U.S. patent application number 12/644748 was filed with the patent office on 2010-07-01 for beating method of used paper processing apparatus, used paper processing method, beating device of used paper processing apparatus, and used paper processing apparatus.
Invention is credited to Yuji Koyama, Shigeru Tamai.
Application Number | 20100163655 12/644748 |
Document ID | / |
Family ID | 42102581 |
Filed Date | 2010-07-01 |
United States Patent
Application |
20100163655 |
Kind Code |
A1 |
Tamai; Shigeru ; et
al. |
July 1, 2010 |
BEATING METHOD OF USED PAPER PROCESSING APPARATUS, USED PAPER
PROCESSING METHOD, BEATING DEVICE OF USED PAPER PROCESSING
APPARATUS, AND USED PAPER PROCESSING APPARATUS
Abstract
The invention presents a beating technology of used paper
processing apparatus of furniture size, capable of preventing leak
or disclosure of confidential information, personal information or
any other information securely and capable of holding a high
confidentiality, that can be installed not only in a large office,
but also in a small shop or general household. In the beating
process of the beating unit in the used paper processing apparatus
of furniture size, by using at least one grinder having beating
action surfaces disposed oppositely across a tiny beating gap, and
a pair of beating disks rotating relatively, the beating gap of the
beating action surfaces is controlled or adjusted to be narrower
gradually from the beginning till the end of the beating process.
As a result, a smooth and efficient beating operation is realized
from the beginning till the end of the beating process.
Inventors: |
Tamai; Shigeru; (Osaka,
JP) ; Koyama; Yuji; (Osaka, JP) |
Correspondence
Address: |
Cheng Law Group, PLLC
1100 17th Street, N.W., Suite 503
Washington
DC
20036
US
|
Family ID: |
42102581 |
Appl. No.: |
12/644748 |
Filed: |
December 22, 2009 |
Current U.S.
Class: |
241/28 ;
241/220 |
Current CPC
Class: |
D21B 1/32 20130101; Y02W
30/64 20150501; D21D 1/30 20130101; Y02W 30/646 20150501 |
Class at
Publication: |
241/28 ;
241/220 |
International
Class: |
D21D 1/30 20060101
D21D001/30 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 27, 2008 |
JP |
2008-335489 |
Claims
1. A beating method of used paper processing apparatus, being a
beating method applied in a used paper processing apparatus
comprising a fragmenting process of agitating, grinding and
fragmenting used paper, and a beating process of beating the used
paper fragmented in the fragmenting process, wherein, in the
beating process, by using at least one beating means provided with
a pair of beating disks rotating relatively, with beating action
surfaces disposed oppositely across a tiny beating gap, the beating
gap of the beating action surfaces is gradually narrowed from the
beginning till the end of the beating process.
2. The beating method of used paper processing apparatus of claim
1, wherein a used paper pulp circulation route is formed by
disposing at least one beating means, and the used paper pulp
beaten by the beating means is circulated in the used paper pulp
circulation route and beaten in the beating process, and the
beating gap of the beating action surfaces is gradually narrowed
from the beginning till the end of the beating process.
3. The beating method of used paper processing apparatus of claim
2, wherein, in the beating process, the beating gap of the beating
means is controlled to be narrowed in gradual steps from the
beginning till the end of the beating process.
4. The beating method of used paper processing apparatus of claim
2, wherein, in the beating process, the beating gap of the beating
means is controlled to be narrowed gradually and continuously from
the beginning till the end of the beating process.
5. The beating method of used paper processing apparatus of claim
1, wherein a used paper pulp route is formed by disposing a
plurality of the beating means in series, and the beating gap of
the plurality of beating means is fixed and set to be narrower
gradually from the upstream side to the downstream side.
6. The beating method of used paper processing apparatus of claim
5, wherein the opening area of the beating gap in the plurality of
beating means is set so that the flow rate of the used paper pulp
may be substantially uniform.
7. The beating method of used paper processing apparatus of claim
1, wherein the beating means is formed as a grinder having a pair
of beating disks rotating relatively, beating action surfaces of
the disks are disposed oppositely across a tiny beating gap each
other, and the beating action surfaces have annular flat surfaces
formed on the outer circumference of the beating disks, and the
annular flat surfaces form the beating gap.
8. The beating method of used paper processing apparatus of claim
7, wherein the beating action surfaces are grinding surfaces formed
by coupling multiple abrasive grains by means of a binding
material.
9. A used paper processing method of used paper processing
apparatus comprising a fragmenting process of agitating, grinding
and fragmenting the used paper, and a beating process of beating
the used paper fragmented in the fragmenting process, wherein, in
the beating process, by using at least one beating means provided
with a pair of beating disks rotating relatively, with beating
action surfaces disposed oppositely across a tiny beating gap, the
beating gap of the beating action surfaces is gradually narrowed
from the beginning till the end of the beating process.
10. The used paper processing method of used paper processing
apparatus of claim 9, wherein the fragmenting process is
characterized by using agitating means disposed rotatably in a
fragmenting tank, the used paper is charged into the fragmenting
tank, and water in a quantity corresponding to the charged amount
of the used paper is supplied to the fragmenting tank, and the used
paper and water are agitated by the agitating means, thereby the
used paper is fragmented and beaten.
11. The used paper processing method of used paper processing
apparatus of claim 10, wherein shredder means is provided at a used
paper inlet of the fragmenting tank, and the used paper charged
from the used paper inlet is preliminarily shredded by the shredder
means, and is agitated by the agitating means.
12. A beating device of used paper processing apparatus, being a
beating device for composing the beating unit in the used paper
processing apparatus which comprises a fragmenting unit for
agitating, grinding and fragmenting the used paper, and a beating
unit for beating the used paper fragmented in the fragmenting unit,
these fragmenting unit and beating unit are installed in an
apparatus case of furniture size, the beating device comprising: at
least one beating means, wherein the beating means is formed as a
grinder having a pair of beating disks rotated and driven
relatively, beating action surfaces of the beating disks are
disposed oppositely across a tiny beating gap each other, wherein
the beating gap of the beating action surfaces of the beating means
is set to be narrower gradually from the beating means at the
beginning of the beating process toward the beating means at the
end.
13. The beating device of used paper processing apparatus of claim
12, wherein the beating means includes a beating tank having a
supply port for supplying the used paper pulp from the upstream
side and a discharge port for discharging the beaten used paper
pulp to the downstream side, a pair of beating disks disposed
relatively and rotatably in the beating tank, and a rotation drive
source for rotating and moving these beating disks relatively, and
the used paper pulp supplied from the supply port is pressurized
and beaten by the beating action surfaces while being passed
through the beating gap between the beating disks.
14. The beating device of used paper processing apparatus of claim
13, wherein gap adjusting means is provided for moving the pair of
beating disks relatively in the rotation axial direction, and
adjusting the beating gap of these beating disks.
15. The beating device of used paper processing apparatus of claim
12, wherein one of the pair of beating disks is a fixed beating
disk provided fixedly in the rotating direction, and the other is a
rotatable beating disk provided ratatably, and an inlet
communicating with the supply port of the beating tank is formed in
a central position of the beating action surface of the fixed
beating disk, and two annular flat surfaces formed on the outer
peripheral edges of the beating action surfaces of the pair of
beating disks form an exit communicating with a discharge port of
the beating tank and having the beating gap.
16. The beating device of used paper processing apparatus of claim
15, wherein the beating action surfaces are grinding surfaces
formed by coupling multiple abrasive grains by means of a binding
material.
17. The beating device of used paper processing apparatus of claim
12, wherein a used paper pulp circulation route is formed by
disposing at least one beating means, and circulating means for
circulating the used paper in the used paper pulp circulation route
is provided, the used paper pulp fragmented and processed in the
fragmenting unit is circulated in the used paper pulp circulation
route by means of the circulating means, and is beaten in the
beating process by the beating means, and the beating gap of the
beating action surfaces of the beating means is set to be narrower
gradually from the beating means at the beginning of the beating
process toward the beating means at the end.
18. The beating device of used paper processing apparatus of claim
17, wherein at least one beating means is provided in the used
paper pulp circulation route, and the beating gap of the beating
means is controlled to be narrowed at same size in gradual steps
from the beginning till the end of the beating process.
19. The beating device of used paper processing apparatus of claim
17, wherein at least one beating means is provided in the used
paper pulp circulation route, and the beating gap of the beating
means is controlled to be narrowed gradually and continuously at
same size from the beginning till the end of the beating
process
20. The beating device of used paper processing apparatus of claim
17, further comprising: beating control means for controlling the
beating means, wherein the beating control means is configured so
as to execute the beating process while circulating the used paper
pulp after the beating process by the beating means in the used
paper pulp circulation route by the circulating means, and the
drive source of the beating means is driven and controlled so that
the beating gap of the beating action surfaces may be narrower
gradually from the beginning till the end of the beating
process.
21. The beating device of used paper processing apparatus of claim
20, wherein, in the used paper pulp circulation route, a
fragmenting tank of the fragmenting unit is included, and when
executing the beating method, the agitating means of the
fragmenting unit is driven and controlled.
22. The beating device of used paper processing apparatus of claim
21, wherein, in the used paper pulp circulation route, a bypass
route including a reserve tank for storing the used paper pulp
beaten by the beating means is connected by means of changeover
means, and when executing the beating method, the changeover means
is driven and controlled so as to change over and use selectively
the fragmenting tank of the fragmenting unit and the reserve tank
of the bypass route.
23. The beating device of used paper processing apparatus of claim
12, wherein a used paper pulp route is formed by consecutively
linking the plurality of beating means, and the beating gap of
beating action surfaces of the beating means are fixed and set so
as to be narrower gradually from the beginning beating means till
the ending beating means in the beating process.
24. The beating device of used paper processing apparatus of claim
23, further comprising: beating control means for controlling the
beating means, wherein the beating control means drives and
controls the drive source of the plurality of beating means
disposed consecutively in the used paper pulp route, thereby
executing the beating process.
25. The beating device of used paper processing apparatus of claim
23, wherein the opening areas of the beating gaps in the plurality
of beating means are set to be substantially same in the flow rate
of used paper pulp.
26. A used paper processing apparatus installed in an apparatus
case of furniture size for fragmenting and beating the used paper
to make into pulp, comprising: a fragmenting unit for agitating,
grinding and fragmenting the used paper, and a beating unit for
beating the used paper fragmented by the fragmenting unit, wherein
the beating unit has at least one beating means, and the beating
means is formed as a grinder having a pair of beating disks rotated
and driven relatively, beating action surfaces of the beating disks
are disposed oppositely across a tiny beating gap each other, and
the beating gap of the beating action surfaces of the beating means
is set to be narrower gradually from the beating means at the
beginning of the beating process toward the beating means at the
end.
27. The used paper processing apparatus of claim 26, wherein the
fragmenting unit includes a fragmenting tank having a used paper
feed port for feeding and supplying the used paper, and a discharge
port for discharging the fragmented used paper pulp to the
downstream side, and agitating means provided rotatably in this
fragmenting tank, and the used paper supplied from the used paper
feed port is mixed with water and agitated by the agitating means,
and fragmented and beaten.
28. The used paper processing apparatus of claim 27, wherein
shredder means is provided at the used paper feed port of the
fragmenting tank, and the used paper supplied into the used paper
feed port is preliminarily shredded by the shredder means, and is
agitated by the agitating means.
29. The used paper processing apparatus of claim 27, wherein the
fragmenting unit has water feed means for supplying water into the
fragmenting tank.
30. The used paper processing apparatus of claim 26, further
comprising: dewatering means for dewatering the used paper pulp
beaten to become pulp by the beating unit.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a beating method of used
paper processing apparatus, a used paper processing method, a
beating device of used paper processing apparatus, and a used paper
processing apparatus, and more particularly to a used paper
processing technology for processing so-called used paper, that is,
used and unnecessary documents such as confidential papers in
government offices or private companies, or personal documents in
general household, effectively while preventing leak or disclosure
of confidential information, personal information, and various
other information written or printed in such documents.
[0003] 2. Description of the Related Art
[0004] In daily activities at government offices or private
companies, customer information, personal information, project
information, in-company information, plans and schemes, apparatus
design documents, and various confidential information are printed
in documents and managed and used, and in daily life at general
household, letters and postcards carrying the name and address of
individuals, electric bill and gas meter bill and other documents
carrying the personal information are used, and these documents are
used and not required, they are discarded as used paper.
[0005] In the modern life of electronic society in the background
of rapid progress in information technology, it is essential to
prevent leak or disclosure of customer information written in used
paper confidential information printed in design paper, name and
address and other personal information, and various other
information written or printed in such documents, and the
preventive measures and technology are developed competitively.
[0006] Among them, the shredder is used widely in office or at
home, as a useful tool for preventing leak of important corporate
information or personal information. That is, the shredder is
provided with a function of shredding used documents into small
pieces (see, for example, Japanese Patent Unexamined Publication
No. 6362752), and the characters and drawings printed in the used
paper are dissected into small pieces so as not to be visible or
legible, and the confidential information and personal information
contained in the characters and drawings can be effectively
prevented from being leaked or disclosed.
[0007] However, the recent dramatic technical progress has made it
possible to restore the original documents from the shredded pieces
of paper (shredded chips), and reproduce and collect confidential
information from the shredded documents. As a result, the
reliability of the shredder once believed to be the protector of
confidential information or personal information is no longer
trusted completely.
[0008] In this relation, the present applicant developed and
presented a used paper processing apparatus as disclosed, for
example, in Japanese Patent Unexamined Publication Laid-Open No.
2007-308837.
[0009] This used paper processing apparatus has realized a used
paper recycling technology of a large size equal to a used paper
recycling plant, in a small size to be installed in a small shop,
or in a room of general household, and the apparatus is contained
in an apparatus case of furniture size, and includes a pulp making
unit for making used paper pulp by fragmenting and beating used
paper, a paper making unit for manufacturing recycled paper from
the used paper pulp manufactured in the pulp making unit, and a
control unit for driving and controlling by interlocking the pulp
making unit and the paper making unit, and the pulp making unit
consists of a fragmenting unit for agitating, grinding and
fragmenting the used paper, and a beating unit for beating the used
paper fragmented in the fragmenting unit.
[0010] The used paper is agitated, fragmented and beating by the
fragmenting unit of the pulp making unit, and made into pulp, and
is further beaten and pulverized by the beating unit, and a desired
used paper pulp is prepared, which is made into recycled paper
later by the paper making unit. In this case, in the pulp making
process, the used paper is decomposed into a fiber level, and the
written characters and drawings are completely decomposed and
destroyed, and cannot be restored, and leak or disclosure of
confidential information and personal information composed of
characters and drawings can be securely prevented.
BRIEF SUMMARY OF THE INVENTION
[0011] It is hence a primary object of the present invention to
present a novel beating technology of used paper processing
apparatus solving the problems of the prior art.
[0012] It is other object of the present invention to present a
beating technology of used paper processing apparatus of furniture
size to be installed not only in a large office, but also in a
small shop or a room in general household, capable of preventing
leak or disclosure of confidential information, personal
information or various data securely, and keeping a high
confidentiality, by further improving and specializing the
mechanical technology of the pulp making section in the used paper
processing apparatus.
[0013] To achieve the objects, the beating method of used paper
processing apparatus of the present invention is a beating method
of used paper processing apparatus including a fragmenting process
of agitating, grinding and fragmenting the used paper, and a
beating process of beating the used paper fragmented in the
fragmenting process, and in beating process, beating action
surfaces are disposed oppositely across a tiny beating gap, and the
beating gap of the beating action surfaces is controlled to be
narrower gradually from the beginning to the end of the beating
process by using at least one beating means having a pair of
beating disks rotating relatively.
[0014] A preferred embodiment may be composed as follows.
[0015] (1) A used paper pulp circulation route is formed by
disposing at least one beating means, the used paper pulp beaten by
the beating means is circulated in the used paper circulation route
in the beating process, and the beating gap of the beating action
surfaces is gradually narrowed from the beginning till the end of
the beating process.
[0016] (2) In the beating process, the beating gap of the beating
means is controlled to be narrowed in gradual steps from the
beginning till the end of the beating process.
[0017] (3) In the beating process, the beating gap of the beating
means is controlled to be narrowed gradually and continuously from
the beginning till the end of the beating process.
[0018] (4) The plurality of beating means are formed in a series of
used paper pulp route, and the beating gap of the plurality of
beating means is fixed and set to be narrower gradually from the
upstream side to the downstream side.
[0019] (5) The opening area of the beating gap in the plurality of
beating means is set so that the flow rate of the used paper pulp
may be substantially uniform.
[0020] (6) The beating means is formed as a grinder having a pair
of beating disks rotating relatively, beating action surfaces of
the beating disks are disposed oppositely across a tiny beating gap
each other, and the beating action surfaces have annular flat
surfaces formed on the outer circumference of the beating disks,
and the annular flat surfaces form the beating gap.
[0021] (7) The beating action surfaces are grinding surfaces formed
by coupling multiple abrasive grains by means of a binding
material.
[0022] The used paper processing method of the present invention
includes a fragmenting process of agitating, grinding and
fragmenting the used paper, and a beating process of beating the
used paper fragmented in the fragmenting process, and the beating
process is realized by the beating method as mentioned above.
[0023] A preferred embodiment may be composed as follows.
[0024] (1) The fragmenting process is characterized by using
agitating means disposed rotatably in a fragmenting tank, the used
paper is charged into the fragmenting tank, and water in a quantity
corresponding to the charged amount of the used paper is supplied
to the fragmenting tank, and the used paper and water are agitated
by the agitating means, thereby the used paper is fragmented and
beaten.
[0025] (2) Shredder means is provided at a used paper inlet of the
fragmenting tank, and the used paper charged from the used paper
inlet is preliminarily shredded by the shredder means, and is
agitated by the agitating means.
[0026] The beating device of the used paper processing apparatus of
the present invention is a beating device of used paper processing
apparatus, being a beating device for composing the beating unit in
the used paper processing apparatus which comprises a fragmenting
unit for agitating, grinding and fragmenting the used paper, and a
beating unit for beating the used paper fragmented in the
fragmenting unit, these fragmenting unit and beating unit are
installed in an apparatus case of furniture size, the beating
device comprising at least one beating means, in which the beating
means is formed as a grinder having a pair of beating disks rotated
and driven relatively, beating action surfaces of the beating disks
are disposed oppositely across a tiny beating gap each other, and
the beating gap of the beating action surfaces of the beating means
is set to be narrower gradually from the beating means at the
beginning of the beating process toward the beating means at the
end.
[0027] A preferred embodiment may be composed as follows.
[0028] (1) The beating means includes a beating tank having a
supply port for supplying the used paper pulp from the upstream
side and a discharge port for discharging the beaten used paper
pulp to the downstream side, a pair of beating disks disposed
relatively and rotatably in the beating tank, and a rotation drive
source for rotating and moving these beating disks relatively, in
which the used paper pulp supplied from the supply port is
pressurized and beaten by the beating action surfaces while being
passed through the beating gap between the beating disks.
[0029] (2) Gap adjusting means is provided for moving the pair of
beating disks relatively in the rotation axial direction, and
adjusting the beating gap of these beating disks.
[0030] (3) One of the pair of beating disks is a fixed beating disk
provided fixedly in the rotating direction, and the other is a
rotatable beating disk provided ratatably, and an inlet
communicating with the supply port of the beating tank is formed in
a central position of the beating action surface of the fixed
beating disk, and two annular flat surfaces formed on the outer
peripheral edges of the beating action surfaces of the pair of
beating disks forms an exit communicating with a discharge port of
the beating tank and having the beating gap.
[0031] (4) The beating action surfaces are grinding surfaces formed
by coupling multiple abrasive grains by means of a binding
material.
[0032] (5) A used paper pulp circulation route is formed by
disposing at least one beating means, and circulating means for
circulating the used paper in the used paper pulp circulation route
is provided, in which the used paper pulp fragmented and processed
in the fragmenting unit is circulated in the used paper pulp
circulation route by means of the circulating means, and is beaten
in the beating process by the beating means, and the beating gap of
the beating action surfaces of the beating means is set to be
narrower gradually from the beating means at the beginning of the
beating process toward the beating means at the end.
[0033] (6) At least one beating means is provided in the used paper
pulp circulation route, and the beating gap of the beating means is
controlled to be narrowed in gradual steps from the beginning till
the end of the beating process.
[0034] (7) At least one beating means is provided in the used paper
pulp circulation route, and the beating gap of the beating means is
controlled to be narrowed gradually and continuously from the
beginning till the end of the beating process
[0035] (8) Beating control means for controlling the beating means
is provided, and this beating control means is configured so as to
execute the beating process while circulating the used paper pulp
after the beating process by the beating means in the used paper
pulp circulation route by the circulating means, and the drive
source of the beating means is driven and controlled so that the
beating gap of the beating action surfaces may be narrower
gradually from the beginning till the end of the beating
process.
[0036] (9) In the used paper pulp circulation route, a fragmenting
tank of the fragmenting unit is included, and when executing the
beating method, the agitating means of the fragmenting unit is
driven and controlled.
[0037] (10) In the used paper pulp circulation route, a bypass
route including a reserve tank for storing the used paper pulp
beaten by the beating means is connected by means of changeover
means, and when executing the beating method, the changeover means
is driven and controlled so as to change over and use selectively
the fragmenting tank of the fragmenting unit and the reserve tank
of the bypass route.
[0038] (11) A used paper pulp route is formed by consecutively
linking the plurality of beating means, and the beating gap of
beating action surfaces of the beating means is fixed and set so as
to be narrower gradually from the beginning beating means till the
ending beating means in the beating process.
[0039] (12) Beating control means for controlling the beating means
is provided, and this beating control means drives and controls the
drive source of the plurality of beating means disposed
consecutively in the used paper pulp route, thereby executing the
beating process.
[0040] (13) The opening areas of the beating gaps in the plurality
of beating means are set to be substantially same in the flow rate
of used paper pulp.
[0041] Further, the used paper processing apparatus of the present
invention is a used paper processing apparatus installed in an
apparatus case of furniture size for fragmenting and beating the
used paper to make into pulp, including a fragmenting unit for
agitating, grinding and fragmenting the used paper, and a beating
unit for beating the used paper fragmented by the fragmenting unit,
in which the beating unit is composed of the beating device
described above.
[0042] A preferred embodiment may be composed as follows.
[0043] (1) The fragmenting unit includes a fragmenting tank having
a used paper feed port for feeding and supplying the used paper,
and a discharge port for discharging the fragmented used paper pulp
to the downstream side, and this fragmenting tank has rotatable
agitating means, and the used paper supplied from the used paper
feed port is mixed with water and agitated by the agitating means,
and fragmented and beaten.
[0044] (2) Shredder means is provided at the used paper feed port
of the fragmenting tank, and the used paper supplied into the used
paper feed port is preliminarily shredded by the shredder means,
and is agitated by the agitating means.
[0045] (3) The fragmenting unit has water feed means for supplying
water into the fragmenting tank.
[0046] (4) Dewatering means is provided for dewatering the used
paper pulp beaten by the beating unit.
[0047] (i) According to the present invention, in the beating
process for beating the used paper fragmented in the preceding
fragmenting process, the beating action surfaces are disposed
oppositely across a tiny beating gap, and by using at least one
beating means having a pair of beating disks rotating relatively,
the beating gap of the beating action surfaces is gradually
narrowed from the beginning till the end of the beating process,
and therefore smooth and efficient beating is realized from the
beginning till the end of the beating process.
[0048] That is, for example, in an early stage of beating, the
beating gap of the beating action surfaces is set to a clearance
dimension corresponding to the size of the fibers of used paper
pulp fragmented in the preceding fragmenting process, and hence the
used paper pulp is smoothly promoted to pass through the beating
gap, and a high beating rate is achieved, and in a later stage of
beating, the clearance dimension is adjusted to a size capable of
beating to fibers of used paper pulp of desired finishing
dimension, so that the used paper pulp of desired fiber size will
be obtained finally. As a result, a smooth and efficient beating is
realized from the beginning till the end of the beating
process.
[0049] Accordingly, the used paper is decomposed into fiber level
(to be pulp), and the written characters and drawing are completely
removed and eliminated, and cannot be restored, and leak of
disclosure of confidential information or personal information
written in characters and drawings can be prevented securely, and a
high confidentiality is assured.
[0050] (ii) Moreover, for such smooth and efficient beating, large
power is not needed, and the used paper processing apparatus of
furniture size can be installed in a small shop, small office or
household room, and leak or disclosure of any information written
in various documents can be securely prevented, from the individual
level of private letters in general household, to the public level
of confidential documents in government offices and private
enterprises, and the running cost is also low.
[0051] (iii) The used paper pulp circulation route is formed by
disposing at least one beating means, and the used paper pulp
beaten by the beating means is circulated in the used paper pulp
circulation route in the beating process, so that the used paper
pulp may be beaten efficiently according to the purpose, and an
appropriate beating effect will be obtained.
[0052] In particular, because of the used paper processing
apparatus of furniture size, the used paper pulp beating process
route of an infinite length basically not limited in length can be
formed in a limited process space, and the compact used paper
processing apparatus of furniture size is capable of assuring a
wide beating process space nearly equal to the beating process in a
large apparatus.
[0053] (iv) The used paper processing apparatus employing such
beating technique is compact in the apparatus structure, and can be
installed not only in a large office, but also in a small shop or
general household, and from this viewpoint, too, leak or disclosure
of confidential information, personal information or other
information can be prevented securely.
[0054] The other objects and features of the present invention will
be understood and appreciated by reading the following detailed
description along with the accompanying drawings, and novel facts
indicated in the claims thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
[0055] FIG. 1 is a front sectional view showing an overall outline
configuration of a used paper processing apparatus in preferred
embodiment 1 of the present invention.
[0056] FIG. 2 is a magnified front view of a partial section of
principal configuration of a beating unit of the used paper
processing apparatus.
[0057] FIG. 3 is a magnified front view of an internal
configuration of a grinder as a principal component of the beating
unit.
[0058] FIG. 4 is a perspective exploded view of principal parts of
the grinder of the beating unit.
[0059] FIG. 5 is a circuit diagram of a configuration of used paper
pulp circulation route of the beating unit.
[0060] FIG. 6 is a block diagram of control configuration of the
used paper processing apparatus.
[0061] FIG. 7 is a perspective view of outline configuration of the
used paper processing apparatus.
[0062] FIG. 8 is a circuit diagram of a configuration of used paper
pulp circulation route of a beating unit in a used paper processing
apparatus in preferred embodiment 3 of the present invention.
[0063] FIG. 9 is a circuit diagram of a configuration of used paper
pulp circulation route of a beating unit in a used paper processing
apparatus in preferred embodiment 4 of the present invention.
[0064] FIG. 10 is a front sectional view of an overall outline
configuration of a used paper processing apparatus in preferred
embodiment 5 of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0065] Preferred embodiments of the present invention are
specifically described below while referring to the accompanying
drawings. Throughout the drawings, same reference numerals refer to
same components or elements.
Preferred Embodiment 1
[0066] The used paper processing apparatus of the present invention
is shown in FIG. 1 to FIG. 7, in which a used paper processing
apparatus 1 is installed specifically at the site of origin of used
paper, and is an apparatus for fragmenting and beating the used
paper UP and processing into pulp, and such used paper UP includes
confidential documents occurring in government offices and private
companies, and private letters in general household, and other used
and unnecessary documents.
[0067] The used paper processing apparatus 1 has a furniture size
as shown in FIG. 7, that is, size and shape similar to office
equipment, such as document rack, locker, desk, copier, or personal
computer, and is mainly composed of a fragmenting unit 2, a beating
unit (beating device) 3, and a device control unit 4 as shown in
FIG. 1, and these device components 2 to 4 are contained in an
apparatus case 5 in a compact design, and the drive source of the
fragmenting unit 2 and the beating unit 3 is a motor-driven power
source driven by a general household alternating-current power
source.
[0068] The apparatus case 5 has a furniture size as mentioned
above, and the specific dimensions and shape are designed properly
depending on the purpose and application. The apparatus case 5 in
the illustrated preferred embodiment is a cubic box having
dimensions and shape like a copier used in an office, and the outer
circumference is covered with a decorative case cover 5a. The
bottom of the apparatus case 5 is provided with casters 80, 80, . .
. as moving means so as to be moved freely on the floor. In the
ceiling of the apparatus case 5, a closable inlet 81 is provided
for supplying used paper UP, and a closable pulp recovery port 82
is provide at the side for taking out and collecting the used paper
pulp UPP.
[0069] The fragmenting unit 2 is a process unit for agitating,
grinding, and fragmenting the used paper UP, and is mainly composed
of a fragmenting tank 10, an agitating device (agitating means) 11,
and a water feed device (water feeding means) 12.
[0070] The fragmenting tank 10 is provided with the inlet (used
paper inlet) 81 for feeding and supplying used paper UP in the
ceiling wall as shown in FIG. 1, and a discharge port 83 for
discharging the fragmented used paper pulp UPP to the downstream
side is provided in the bottom wall. The inner volume of the
fragmenting tank 10 is determined depending on the number of sheets
of used paper UP to be agitated and processed in batch. In the
shown preferred embodiment, about 98 liters of water is added, and
the fragmenting tank 10 has a capacity of agitating and processing
about 500 sheets (about 2000 g) of used paper UP of A4 format PPC
(plain paper copier) (in batch process). At this time, the
concentration of used paper pulp UPP to be fragmented is about
2%.
[0071] The inlet 81 can be opened to outside of the case cover 5a
of the apparatus case 5. The discharge port 83 can be opened and
closed by an opening valve 84, and communicates with a used paper
pulp circulation route 38 described below. At the position of the
discharge port 83, a debris filter 13 is provided for removing
paper clips, staples, wires and others used for binding used paper
UP, UP, . . . which may become troubles in the subsequent beating
process.
[0072] The opening valve 84 is specifically opened and closed by
the crank motion of a crank mechanism 86 by a drive motor 85. The
drive motor 85 is specifically an electric motor, and the drive
motor 85 is electrically connected to the device control unit
4.
[0073] The agitating device 11 is provided inside of the
fragmenting tank 10, and is provided with an agitating impeller 15
and a drive motor 16.
[0074] The agitating impeller 15 has its rotation shaft 15a
rotatably supported upright in the central position of the bottom
of the fragmenting tank 10, and is provided so as to be free to
rotate horizontally, and the lower end of the rotation shaft 15a is
driven and coupled to a rotation shaft 16a of the drive motor 16 by
way of transmission means 17 composed of a transmission pulley 17a,
a transmission belt 17b, and a transmission pulley 17c.
[0075] By rotation and driving of the drive motor 16, the agitating
impeller 15 is continuously or intermittently rotated and driven
normally and reversely. The drive motor 16 is specifically an
electric motor, and the drive motor 16 is electrically connected to
the device control unit 4.
[0076] As the agitating impeller 15 is rotated normally and
reversely, if the used paper UP is agitated directly in its
original A4 format, by the water jet action of normal rotation and
reverse rotation of the agitating impeller 15, the used paper is
dispersed effectively, and entangling on the agitating impeller 15
can be effectively prevented.
[0077] The blade shape of the agitating impeller 15 is designed so
as to be different in the agitating force (dispersion effect) in
normal rotation and reverse rotation, and hence the used paper UP,
UP, . . . may be fragmented and beaten uniformly.
[0078] The operating conditions of the agitating impeller 15, such
as changeover timing of normal rotation and reverse rotation, and
the agitation time are determined on the basis of the preliminary
experiment data so as to obtain desired fragmenting and beating
effects of used paper UP, UP, . . . .
[0079] The water feed device 12 is to supply water into the
agitating device 11, and is provided outside of the apparatus case
5 as shown in FIG. 1 in the illustrated preferred embodiment.
[0080] The water feed device 12 is not specifically shown in its
structure, but includes a water feed source such as water feed
tank, and a water feed pump 20 for supplying the water of the water
feed source as the power, and by this water feed pump 20, the water
from the water feed source is supplied into the fragmenting tank 10
through the water feed piping 12a.
[0081] In this relation, a weight sensor 21 is provided in the
bottom of the fragmenting tank 10, and the amount of used paper UP,
UP, . . . and water to be processed in batch in the fragmenting
tank 10 is measured and controlled, and the weight sensor 21 is
electrically connected to the device control unit 4.
[0082] The weight sensor 21 of the illustrated preferred embodiment
is a load cell, and is designed to detect and measure the total
weight of the weight of the fragmenting tank 10, the amount of used
paper UP, UP, . . . and water supplied into the fragmenting tank
10.
[0083] In a specific control configuration of the fragmenting unit
2, first the worker opens the inlet 81, and used paper UP, UP, . .
. are charged into the fragmenting tank 10, and the weight detected
and measured by the weight sensor 21, and when reaching a specified
amount (number of sheets), the worker is informed by sound and/or
display. According to the display, the worker closes the inlet 81,
and the water feed device 12 is driven, and the water feed pump 20
supplies the water in the water supply source into the fragmenting
tank 10 by the amount corresponding to the weight (number of
sheets) of charged used paper UP, UP, . . . .
[0084] In the illustrated preferred embodiment, as mentioned above,
when the used paper UP of A4 format of about 500 sheets (about 2000
g) is charged into the fragmenting tank 10, the worker is informed
at this moment by sound and/or display, and when the inlet 81 is
closed, about 98 liters of water is supplied into the water feed
device 12.
[0085] In the agitating device 11, the used paper UP, UP, . . .
charged into the fragmenting tank 10 from the opening or the inlet
81 of the apparatus case 5 are, by normal and reverse rotation of
the agitating impeller 15 by the drive motor 16, agitated and mixed
for a specified time (about 10 minutes to 20 minutes in the
illustrated preferred embodiment) in the water supplied from the
water feed device 12, and thereby the used paper UP, UP, . . . are
fragmented and beaten, and transformed into used paper pulp
UPP.
[0086] The discharge port 83 of the fragmenting tank 10 is closed
by the opening valve 84 during normal operation of the fragmenting
unit 2, and flow of used paper UP or used paper pulp UPP from the
fragmenting tank 10 into the used paper pulp circulation route 38
is blocked, and during operation of the beating unit 3 mentioned
below, the discharge port 83 is opened by the opening valve 84, and
flow of used paper UP from the fragmenting tank 10 into the used
paper pulp circulation route 38 is permitted along with the
circulatory flow.
[0087] The beating unit 3 is a process unit for beating the used
paper UP fragmented in the fragmenting unit 2, and more
specifically the used paper UP fragmented in the fragmenting unit 2
is pressurized and beaten, and inks forming characters and drawings
on the used paper UP (including printing inks forming characters
and drawings on the used paper UP various printing techniques, or
inks forming characters and drawings on the used paper UP by
pencil, ballpoint pen, fountain pen, other writing tools) are
ground and pulverized (until micro-fibers).
[0088] The beating unit 3 has at least one beating means (one unit
in the illustrated preferred embodiment) 30.
[0089] The beating means 30 is a grinder mainly having a pair of
beating disks 31, 32 rotated and driven relatively as principal
components as shown in FIG. 2 and FIG. 3, and the pair of beating
disks 31, 32 have beating action surfaces 31a, 32a disposed
oppositely and concentrically a cross a tiny beating gap G.
[0090] The beating gap G of the beating action surfaces 31a, 32a of
the grinder (beating means) 30 is set to be narrower gradually from
the beginning of the grinder 30 till the end of the grinder 30 in
the beating process as described below.
[0091] In the beating unit 3 of the present preferred embodiment,
as shown in FIG. 5, the used paper pulp circulation route 38 having
one grinder 30 is formed, and the used paper pulp UPP is beaten and
processed as being circulated for a specified time by way of the
grinder 30 in the circulation system.
[0092] By execution of the beating process by this used paper pulp
circulation route 38, in spite of the small and limited process
space in the apparatus case 5 of furniture size, the used paper
pulp circulation route of an infinite length basically not limited
in length can be formed, and it is capable of assuring a wide
beating process space nearly equal to the beating process in a
large apparatus, and an appropriate beating effect is obtained
depending on the purpose.
[0093] Besides, since one grinder 30 beats and processes throughout
the whole process of the beating process, this one grinder 30 plays
the function of a plurality of grinders, from the grinder at the
beginning till the grinder at the end of the beating process.
Specifically, the beating gap G of the beating action surfaces 31a,
32a of the grinder 30 is controlled and adjusted to be narrower
gradually from the beginning till the end of the beating
process.
[0094] The grinder 30 in the illustrated preferred embodiment is
provided on an apparatus machine body 90 for composing the
apparatus case 5, adjacently to the fragmenting tank 10 of the
fragmenting unit 2, and includes, as shown in FIG. 2, a beating
tank 35 communicating with the fragmenting tank 10 of the
fragmenting unit 2, a pair of beating disks 31, 32 provided in the
beating tank 35 to be rotatable relatively, a rotation drive source
36 for relatively rotating and driving the pair of beating disks
31, 32, and gap adjusting means 37 for adjusting the beating gap G
of the pair of beating disks 31, 32.
[0095] The beating tank 35 formed in a closed cylindrical shape so
as contain the pair of beating disks 31, 32, and has a feed port
35a for supplying the used paper pulp UPP from the upstream side,
and a discharge port 35b for discharging the beaten used paper pulp
UPP to the downstream side.
[0096] More specifically, the feed port 35a is opened in the center
of the bottom of the beating tank 35 toward the vertical direction,
and the discharge port 35b is opened at the cylindrical side of the
beating tank 35 toward the horizontal direction. The feed port 35a
and the discharge port 35b communicate with the fragmenting tank 10
of the fragmenting unit 2 by way of circulation piping 38a, 38b
respectively, and the discharge port 35b further communicates with
a used paper pulp collection tank 40 by way of a discharge piping
39.
[0097] Reference numeral 41 is a direction changeover valve, and by
the changeover action of this direction changeover valve 41, the
used paper pulp UPP discharged from the discharge port 35b is
selectively refluxed into the fragmenting tank 10, or collected in
the used paper pulp collection tank 40. The direction changeover
valve 41 is specifically an electromagnetic opening valve, and is
electrically connected to the device control unit 4.
[0098] The pair of beating disks 31, 32 consist of one fixed
beating disk fixed in the rotating direction, and other rotatable
beating disk, and in the illustrated preferred embodiment, as shown
in FIG. 4, the upper beating disk 31 is the rotatable side, and the
lower beating disk 32 is the fixed side.
[0099] The lower fixed side beating disk 32 is fixed to the inner
side of the bottom of the beating tank 35 by means of a screw-type
hollow fixing member 42, and the upper rotary side beating disk 31
is disposed oppositely to this fixed side beating disk 32,
concentrically and rotatably relatively across a tiny beating gap
G.
[0100] This rotary side beating disk 32 is driven and coupled by a
drive motor 36 by way of a rotation spindle 44 supported on an
apparatus base 43 mounted and fixed on an apparatus machine body 90
rotatably and movably in the axial direction.
[0101] The rotation spindle 44 is supported on an elevating member
45 of the gap adjusting means 37 described later, rotatably by
bearings 46, 46, and the rotary side beating disk 32 is formed at
its leading end portion 44a concentrically and integrally by means
of a mounting nut member 47, and its base end portion 44b driven
and coupled to a rotation shaft 36a of the drive motor 36 by means
of a shaft coupling 48, integrally in the rotating direction and
movably in the axial direction relatively.
[0102] The drive motor 36 is a rotation drive source, which rotates
and moves the pair of beating disks 31, 32 relatively, and it is
specifically an electric motor, and this drive motor 36 is
electrically connected to the device control unit 4.
[0103] The leading end portion 44a of the rotation spindle 44 is
opposite to the inside of the beating tank 35 by way of an opening
49 in the center of the ceiling of the beating tank 35, and the
interval of the opening 49 and the rotation spindle 44 is not
sealed, and the inside and the outside of the beating tank 35
communicate with each other, and the seal structure is simplified.
The sealing performance of this location is assured by controlling
and adjusting the volume of the used paper pulp UPP so that the
discharge amount from the discharge port 35b may be larger than the
supply amount from the feed port 35a.
[0104] The opposite sides 31a, 32a of the both beating disks 31, 32
having the tiny beating gap G cooperate to form the beating action
surfaces. These opposite beating action surfaces 31a, 32a formed as
grinding surfaces having multiple abrasive grains bonded by a
bonding material, and the both beating action surfaces 31a, 32a are
formed in a taper shape, as shown in FIG. 3 and FIG. 4, so that the
diameter dimensions may be larger continuously in the mutually
opposite directions, and annular flat surfaces 31b, 32b are formed
so that the outermost peripheral edges may be parallel to each
other, and these annular flat surfaces 31b, 32b are forming the
beating gap G.
[0105] In other words, in the pair of beating disks 31, 32, in the
central position of the beating action surface 32a of the fixed
side beating disk 32, an inlet 50 communicating concentrically with
the feed port 35a of the beating tank is formed, and two annular
flat surfaces 31b, 32b formed on the outer peripheral edge of the
beating action surfaces 31a, 32b of the pair of beating disks 31,
32 communicate with the discharge port 35b of the beating tank 35,
and form an outlet 51 having the beating gap G.
[0106] On the outer circumference of the rotary side beating disk
31, a plurality of blades 52, 52, . . . are provided at specified
intervals in the circumferential direction, and these blades 52,
52, . . . have pump actions for extruding the used paper pulp UPP
discharged from the discharge port 51 toward the discharge port 35b
of the beating tank 35 by the centrifugal force by rotation of the
rotary side beating disk 31.
[0107] By the drive motor 36, the rotary side beating disk 31 is
rotated and driven oppositely to the fixed side beating disk 32,
and the used paper pulp UPP supplied from the fragmenting tank 10
of the fragmenting unit 2 into the beating space B by way of the
feed port 35a of the beating tank 35 and the inlet flows from the
inlet 50 into the beating space B, and passes through the beating
space B, and receives the pressurizing and the beating action by
the relatively rotating beating action surfaces 31a, 32a, and the
ink particles forming the characters and drawings on the used paper
UP are pulverized and destroyed, and the used paper pulp UPP is
discharged from the discharge port 35 of the beating tank 35 by way
of the outlet 51.
[0108] When being discharged from the outlet 51, the used paper
pulp UPP further receives the pressurizing and the beating action
at the position of the outlet 51 having the beating gap G, and is
pulverized to specified micron size (to become micro fibers) by the
beating gap G.
[0109] In this regard, in the present preferred embodiment, as
mentioned above, one grinder 30 is installed in the used paper pulp
circulation route 38 in the circulatory beating process (see FIG.
5), and one grinder 30 functions as a plurality of grinders, from
the grinder at the beginning the grinder at the end of the beating
process, and the beating gap G of the grinder 30 is controlled and
adjusted to be narrower gradually from the beginning till the end
of the beating process by way of the gap adjusting means 37.
[0110] The gap adjusting means 37 is specifically shown in FIG. 2,
in which the pair of beating disks 31, 32 are relatively moved in
the direction of axis of rotation, and the beating gap G of these
beating disks 31, 32 is controlled and adjusted, and it is mainly
composed of moving means 55 for moving the rotary side beating disk
31 in the direction of the axis of rotation, that is, in the axial
direction of the rotation spindle 44, and a drive source 56 for
driving this moving means 55.
[0111] The moving means 55 has the elevating member 45 mentioned
above and a rotary mechanism 57 for rotating and moving this
elevating member 45. The elevating member 45 is nearly cylindrical,
and is supported, as shown in FIG. 2, on an apparatus base 43 to as
to be movable back and forth concentrically and vertically on the
pair of beating disks 31, 32, and the rotation spindle 44 is
rotatably supported in the inside by way of the bearings 46, 46. At
the upper end of the elevating member 45, a gear 57a of a rotary
mechanism 57 is provided integrally, and a pinion 57b to be engaged
with the gear 57a is mounted and fixed on a rotation shaft 56a of
the drive motor 56 as the drive source.
[0112] The drive motor 56 is specifically an electrical motor, and
this drive motor 56 is electrically connected to the device control
unit 4.
[0113] By rotation of this drive motor 56, the elevating member 45
ascends and descends together with the rotation spindle 44 on the
apparatus base 43 by way of the rotary mechanism 57, and the rotary
side beating disk 31 integral with the rotation spindle 44 moves in
the vertical direction to the fixed side beating disk 32, that is,
in the direction of the axis of rotation, and thereby the beating
gap G of the both beating disks 31, 32 is controlled and
adjusted.
[0114] For this purpose, a position detection sensor 58 (see FIG.
6) is provided for detecting the elevating position of the rotary
side beating disk 31, and depending on the detection result of the
position detection sensor 58, the drive motor 56 is driven and
controlled. The position detection sensor 58 may be realized by an
encoder for detecting the number of revolutions of the drive motor
56, a proximity sensor for detecting the rotating position of the
gear 57a or the pinion 57b of the rotary mechanism 57, or a
proximity sensor for detecting directly the elevating position of
the rotary side beating disk 31, and in the shown illustrated
preferred embodiment, a proximity sensor for detecting the rotating
position of the gear 57a of the rotary mechanism 57 is used. This
position detection sensor 58 is electrically connected to the
device control unit 4.
[0115] The beating gap G of the beating disks 31, 32 is controlled
and adjusted by the gap adjusting means 47 as shown in FIG. 5, in
mutual cooperation with the circulation pump 60 as circulating
means in the circulatory beating process in the used paper pulp
circulation route 38.
[0116] That is, as shown in FIG. 5, the used paper pulp circulation
route 38 is composed of circulation piping 38a and 38b, being
formed in an annular loop by way of the fragmenting tank 10 of the
fragmenting unit, the circulation pump 60, and one grinder 30, and
at an intermediate point of the circulation piping 38b, a discharge
piping 39 is branched and connected to communicate with the used
paper pulp collecting tank 40 by way of the discharge piping 39
through the direction changeover valve 41.
[0117] The used paper pulp UPP fragmented and processed by the
fragmenting unit 2 is circulated in the used paper pulp circulation
route 38 by means of the circulation pump 60, and the beating
process is executed by the grinder 30, and the beating gap G of the
beating action surfaces 31a, 32a of the grinder 30 is adjusted at
this time by the gap adjusting means 37 so as to be narrower
gradually from the beginning till the end of the beating
process.
[0118] By the gap adjusting means 37, the beating gap G of the
grinder 30 is controlled and adjusted in the following methods: (i)
the beating gap G of the grinder 30 is controlled to be narrower
gradually from the beginning till the end of the beating process,
(ii) the beating gap G of the grinder 30 is controlled to be
narrower continuously from the beginning till the end of the
beating process, and others, and the former method is employed in
the illustrated preferred embodiment.
[0119] The timing and magnitude of gradual narrowing of the beating
gap G of the grinder 30 may be determined appropriately so that the
beaten used paper pulp UPP may not be clogged in the beating gap G
according to the conditions obtained by tests in consideration of
the relation of the concentration of the used paper pulp UPP and
the circulation flow rate and time of the used paper pulp UPP by
the circulation pump 60.
[0120] In the illustrated preferred embodiment, the conditions are
set as follows.
[0121] (a) Concentration of used paper pulp UPP being beaten: about
2%
[0122] (b) Size of beating gap G of the grinder: 4 stages as the
following timing.
[0123] First stage: the beating gap G is 1 mm, being circulated for
5 minutes.
[0124] Second stage: the beating gap G is 0.4 mm, being circulated
for 25 minutes.
[0125] Third stage: the beating gap G is 0.12 mm, being circulated
for 45 minutes.
[0126] Fourth stage: the beating gap G is 0.05 mm, and the beaten
pulp is discharged and collected in the used paper pulp collecting
tank 40.
[0127] The fragmenting tank 10 of the fragmenting unit 2 is
included in the used paper pulp circulation route 38, and therefore
in the beating process, the agitating device 11 of the fragmenting
unit 2 is driven and controlled, and the fragmenting unit 2 is
driven simultaneously with the beating unit 3.
[0128] In other words, in the circulatory beating process, while
the used paper pulp UPP flows out from the fragmenting tank 10 into
the used paper pulp circulation route 38, the used paper pulp UPP
beaten by the grinder 30 flows into the fragmenting tank 10, and
therefore in the fragmenting tank 10, components of used paper pulp
UPP different in the degree of beating coexist, and by the
agitating action of the agitating device 11, the degree of beating
of the used paper pulp UPP in the fragmenting tank 10 becomes more
uniform, so that the fragmenting process is promoted.
[0129] The used paper pulp collecting tank 40 is a location for
collecting the used paper pulp UPP beating and pulverized to
desired size by the beating unit 3, and the used paper pulp UPP
collected in this location is dewatered and processed by a
dewatering device 62 outside of the apparatus by means of a
discharge pump 61, and is discarded or used as material for
recycled paper, or directly taken out of the apparatus and
discarded as refuse.
[0130] The dewatering device 62 has a conventional known basic
structure, and more preferably a mechanical dewatering device of
centrifugal dewatering system or pressurized dewatering system may
be employed. A drive source 63 of this dewatering device 62 is
electrically connected to the device control unit 4.
[0131] The device control unit 4 is designed to control the
operations of the drive units such as fragmenting unit 2, beating
unit 3, and dewatering device 62 automatically by mutual
cooperation, and is specifically composed of a microcomputer
including CPU, ROM, RAM and I/O ports.
[0132] The device control unit 4 stores programs for executing the
fragmenting process of the fragmenting unit 2 and the beating
process of the beating unit 3 (and the dewatering process of the
dewatering device 62) continuously, and is composed of, as shown in
FIG. 6, a main control unit 70, a fragmenting control unit 71 for
controlling the drive sources 16, 20 of the fragmenting unit 2 (11,
12), a beating control unit 72 for controlling the drive sources
36, 60, 56 of the beating unit 3 (30, 37), and a dewatering control
unit 73 for controlling the drive source 63 of the dewatering
device 62.
[0133] The main control unit 70 stores various information
necessary for driving of the drive sources of the drive units 2, 3,
62, for example, the driving time and rotating speed of the
agitating device 11 in the fragmenting unit 2, the water feed
timing and water feed volume of the water feeding device 12, the
driving time and circulation amount of the circulation pump 60 in
the beating unit 3, the driving time and rotating speed of the
grinder 30, the adjusting timing and adjusting amount of beating
gap G of the gap adjusting means 37, the driving time of the drive
source of the dewatering device 62, and others are appropriately
and selectively entered by the keyboard and the like of the
operation board as control data, and according to such control
data, the weight sensor 21 receives the detection result of the
position detection sensor 58, and controls the control units 71,
72, 73 appropriately.
[0134] The used paper processing apparatus 1 having such
configuration is started when the power source is turned on, and
the individual driving units are automatically controlled in mutual
cooperation by the device control unit 4, and the following
processes are executed. Consequently, the used paper UP, UP, . . .
charged into the used paper processing apparatus 1 are fragmented
and beaten by the fragmenting unit 2 and the beating unit 3, and
leak or disclosure of the confidential information or personal
information written in the used paper UP can be effective
prevented.
[0135] i) The worker puts a specified number of sheet (about 500
sheets or about 2000 g in the illustrated preferred embodiment) of
used paper UP of A4 format PPC into the fragmenting tank 10, and
closes the inlet 81 after the notice by sound and/or display, and
about 98 liters of water is charged into the water feeding device
12.
[0136] ii) The agitating device 11 is driven, and the used paper
UP, UP, . . . charged in the fragmenting tank 10 are agitated in
normal and reverse rotation of the agitating impeller 15 driven by
the drive motor 16, and mixed for a specified time (about 10
minutes to 20 minutes in the illustrated preferred embodiment) in
the water supplied from the water feeding device 12, and the used
paper UP, UP, . . . are fragmented and beaten to be used paper pulp
UPP.
[0137] iii) By driving of the agitating device 11 for a specified
time, the used paper UP, UP, . . . are transformed into used paper
pulp UPP, and the discharge port 83 of the fragmenting tank 10 is
opened by the opening valve 84, and the fragmenting tank 10
communicates with the used paper pulp circulation route 38, and the
circulation pump 60, the grinder 30 and the gap adjusting means 37
of the beating unit 3 are driven.
[0138] The agitating device 11 of the fragmenting unit 2 is driven,
and the used paper pulp UPP left over in the fragmenting tank 10
and the used paper pulp UPP refluxed in the fragmenting tank 10 are
agitated, and the degree of beating of the used paper pulp UPP in
the fragmenting tank 10 is made uniform, and the beating process is
promoted.
[0139] iv) In FIG. 5, the used paper pulp UPP fragmented by the
fragmenting unit 2 is circulated in the used paper pulp circulation
route 38 by the circulation pump 60, and is beaten by the grinder
30 (beating process). At this time, the beating gap G of the
beating action surfaces 31a, 32a of the grinder 30 is adjusted to
be narrower gradually from the beginning till the end of the
beating process by means of gap adjusting means 37, and the beating
process continues.
[0140] v) In the illustrated preferred embodiment, as mentioned
above, at the first stage, the beating gap G is adjusted to 1 mm,
and the used paper pulp UPP is circulated for 5 minutes, and
pressurized and beaten by the grinder 30.
[0141] vi) At the second stage, the beating gap G is adjusted to
0.4 mm, and the used paper pulp UPP is circulated for 25 minutes,
and pressurized and beaten by the grinder 30.
[0142] vii) At the third stage, the beating gap G is adjusted to
0.12 mm, and the used paper pulp UPP is circulated for 45 minutes,
and pressurized and beaten by the grinder 30.
[0143] viii) At the final fourth stage, the beating gap G is
adjusted to 0.05 mm, and the used paper pulp UPP is pressurized and
beaten by the grinder 30, and is pulverized to a specified micron
size (micro fibers are formed).
[0144] ix) The direction changeover valve 41 of the used paper pulp
circulation route 38 is changed over, and the used paper pulp UPP
discharged from the grinder 30 is discharged and collected in the
used paper pulp collecting tank 40 by way of the discharge piping
39.
[0145] x) The used paper pulp UPP collected in the used paper pulp
collecting tank 40 is dewatered a dewatering device 62 outside of
the apparatus by a discharge pump 61, and is discarded or recovered
as material for recycled paper, or is directly taken out of the
apparatus, and discarded together with other refuse.
[0146] In the used paper processing apparatus 1 having such
configuration, in the beating process by the beating unit 3, the
beating action surfaces 31a, 32a are disposed oppositely across a
tiny beating gap G, and by using at least one grinder (beating
means) 30 having a pair of beating disks 31, 32 rotating
relatively, the beating gap G of the beating action surfaces 31a,
32a is adjusted to be narrower gradually from the beginning till
the end of the beating process, so that a smooth and efficient
beating operation is realized from the beginning till the end of
the beating process.
[0147] That is, in an initial stage of the beating process, the
beating gap G of 31a, 32a is set to a clearance corresponding to
the fiber size of used paper pulp UPP fragmented in the preceding
fragmenting process (fragmenting unit 2) (that is, 1 mm in the
illustrated preferred embodiment), and a high beating rate is
maintained while promoting invasion and passing of used paper pulp
UPP smoothly into the beating gap G, and in a final stage of the
beating process, the gap size is adjusted to the clearance for
pulverizing to the fiber size of used paper pulp UPP of desired
finish size (0.05 mm in the illustrated preferred embodiment), so
that the used paper pulp UPP of desired fiber size can be obtained
finally. Therefore, from the beginning till the end of the beating
process, a smooth and efficient beating is realized.
[0148] As a result, the used paper UP is decomposed into fiber
level (to be pulp), and the characters and drawings written in the
paper are completely decomposed and lost, and cannot be restored,
and leak or disclosure of the confidential information or personal
information composed of characters and drawings written in the used
paper UP can be effective prevented, and a high confidentiality is
maintained.
[0149] Moreover, since particularly large power is not needed for
such smooth and efficient beating process, it is ideal for the used
paper processing apparatus 1 of furniture size that can be
installed in a small shop or in a room of general household, and it
is effective to prevent leak or disclosure of the confidential
information or personal information written in documents, from
personal information written in private letters to confidential
information of government offices and general enterprises printed
in various documents, and the running cost is also suppressed
low.
[0150] Besides, the used paper pulp circulation route 38 is formed
by using at least one grinder 30, and the used paper pulp UPP after
the beating process by the grinder 30 is circulated in the used
paper pulp circulation route 38, and is processed, and the used
paper pulp UPP is beaten efficiently according to the purpose, and
an adequate beating efficiency is obtained.
[0151] In particular, in a limited process space of the used paper
processing apparatus of furniture size, the used paper pulp beating
process route of infinite length not limited in length, in
principle, can be formed, and the used paper processing apparatus
of furniture size may have a wide beating process space nearly
equal to that of the beating process in a large-scale
apparatus.
[0152] The used paper processing apparatus 1 of such beating
technology is compact in the apparatus structure, and can be
installed anywhere, from a large office to a small office or a
private home, and from this point of view, too, leak or disclosure
of confidential information and personal information can be
securely prevented.
Preferred Embodiment 2
[0153] This preferred embodiment is indicated by double dot chain
line in FIG. 5, and it is similar to preferred embodiment 1, except
that the structure of the beating unit (beating device) 3 is
modified.
[0154] That is, in the beating unit 3 of this preferred embodiment,
the used paper pulp circulation route 38 includes a bypass route
101 having a reserve tank 100 for storing the used paper pulp UPP
beaten by the grinder 30, being connected by way of a direction
changeover valve 102 as changeover means. The direction changeover
valve 102 is specifically an electromagnetic valve, and is
electrically connected to a beating control unit 72 of the device
control unit 4.
[0155] The beating control unit 72 is designed to drive and control
the direction changeover valve 102 so that the fragmenting tank 10
of the fragmenting unit 2 and the reserve tank 100 of the bypass
route 101 may be changed over and used selectively, when executing
the beating method in preferred embodiment 1.
[0156] More specifically, in the beating process in preferred
embodiment 1, the used paper pulp UPP flowing out into the used
paper pulp circulation route 38 from the fragmenting tank 10 by the
circulation pump 60 is beaten by the grinder 30, and is not
refluxed into the fragmenting tank 10, but flows into the reserve
tank 100 of the bypass route 101 from the direction changeover
valve 102, and this state is maintained until all of used paper
pulp UPP in the fragmenting tank 10 flows out. When all of used
paper pulp UPP in the fragmenting tank 10 flows out, the direction
changeover valve 102 is changed over, and this time the used paper
pulp UPP flowing out in the used paper pulp circulation route 38
from the reserve tank 100 is beaten by the grinder 30, and is not
refluxed into the reserve tank 100, but flows into the fragmenting
tank 10 of the used paper pulp circulation route 38 from the
direction changeover valve 102, and this state is maintained until
all of used paper pulp UPP in the reserve tank 100 flows out.
Thereafter, changeover of the direction changeover valve 102 is
repeated.
[0157] Thus, two storage tanks 10, 100 are used alternately, and in
the circulatory beating process of this preferred embodiment, it is
possible to avoid the circumstance in which the used paper pulp UPP
flows out from the fragmenting tank 10 (or reserve tank 100) into
the used paper pulp circulation route 38 while the used paper pulp
UPP beaten by the grinder 30 flows into the fragmenting tank 10 (or
reserve tank 100), and thereby preventing mixture of used paper
pulp UPP different in the degree of beating within the fragmenting
tank 10 (or reserve tank 100), and not only it is not necessary to
drive the agitating device 11 as in preferred embodiment 1, but
also the beating process efficiency is enhanced as compared with
the beating process in preferred embodiment 1.
[0158] The other structure and action are same as in preferred
embodiment 1.
Preferred Embodiment 3
[0159] This preferred embodiment is shown in FIG. 8, and it is
similar to preferred embodiment 1, except that the structure of the
beating unit (beating device) 3 is modified.
[0160] That is, in the beating unit 3 of the preferred embodiment,
a plurality of (two in the preferred embodiment) grinders 30, 30
are disposed in series in the used paper pulp circulation route
38.
[0161] The beating gaps G, G of these grinders 30, 30 are
controlled to be narrower gradually at same dimension from the
beginning till the end of the beating process.
[0162] In this case, the beating gaps G, G of the grinders 30. 30
by the gap adjusting means 37 is controlled and adjusted, same as
in preferred embodiment 1, in the following methods: (i) the
beating gaps G, G of the grinders 30, 30 are controlled to be
narrower gradually at same dimension from the beginning till the
end of the beating process, (ii) the beating gaps G, G of the
grinders 30. 30 are controlled to be narrower continuously at same
dimension from the beginning till the end of the beating process,
and others, and the former method is employed in the illustrated
preferred embodiment.
[0163] The timing and magnitude of gradual narrowing of the beating
gaps G, G of the grinders 30, 30 may be determined appropriately,
same as in preferred embodiment 1, so that the beaten used paper
pulp UPP may not be clogged in the beating gap G according to the
conditions obtained by tests in consideration of the relation of
the concentration of the used paper pulp UPP, and the circulation
flow rate and time of the used paper pulp UPP by the circulation
pump 60.
[0164] In the illustrated preferred embodiment, the conditions are
set as follows.
[0165] (a) Concentration of used paper pulp UPP being beaten: about
2%
[0166] (b) Size of beating gap G of the grinder 30: 4 stages as the
following timing.
[0167] First stage: the beating gap G is 1 mm, being circulated for
2.5 minutes.
[0168] Second stage: the beating gap G is 0.4 mm, being circulated
for 12.5 minutes.
[0169] Third stage: the beating gap G is 0.12 mm, being circulated
for 22.5 minutes.
[0170] Fourth stage: the beating gap G is 0.05 mm, and the beaten
pulp is discharged and collected in the used paper pulp collecting
tank 40.
[0171] Evidently, in the beating process of this preferred
embodiment, by disposing two grinders 30, 30 in series, the beating
efficiency is 2 times higher, and the required time for beating
process is 1/2 as compared with preferred embodiment 1.
[0172] The other structure and action are same as in preferred
embodiment 1.
Preferred Embodiment 4
[0173] This preferred embodiment is shown in FIG. 9, and it is
similar to preferred embodiment 1, except that the structure of the
beating unit (beating device) 3 is modified.
[0174] That is, in the beating unit 3 of the preferred embodiment,
a plurality of (n units in the illustrated preferred embodiment)
grinders 30.sub.1, 30.sub.2, . . . 30.sub.n are disposed in series
to compose a used paper pulp circulation route 138, and beating
gaps G.sub.1, G.sub.2, . . . , G.sub.n of beating action surfaces
31a, 32a, 31a, 32a, . . . , 31a, 32a of these grinders 30.sub.1,
30.sub.2, . . . 30.sub.n are fixed and set to be narrower gradually
from the grinder 30.sub.1 at the beginning of the beating process
to the grinder 30.sub.n at the end.
[0175] For example, in the grinder 30.sub.1 at the beginning of the
beating process, the beating gap G.sub.1 of the beating action
surfaces 31a, 32a is set to a clearance corresponding to the fiber
size of used paper pulp UPP fragmented in the preceding fragmenting
process (fragmenting unit 2) (that is, 1 mm in the illustrated
preferred embodiment), and a high beating rate is maintained while
promoting invasion and passing of used paper pulp UPP smoothly into
the beating gap G.sub.1, and in a final stage of the beating
process of the grinder 30.sub.n, the gap size is adjusted to the
clearance for pulverizing to the fiber size of used paper pulp UPP
of desired finish size (0.05 mm in the illustrated preferred
embodiment), so that the used paper pulp UPP of desired fiber size
can be obtained finally.
[0176] In this configuration, so as to be equal in the grinding
efficiency in the beating gaps G.sub.1, G.sub.2, . . . , G.sub.n of
the grinders 30.sub.1, 30.sub.2, . . . , 30.sub.n, the opening area
of the beating gaps G.sub.1, G.sub.2, . . . , G.sub.n, that is, the
opening area of the outlets 51.sub.1, 51.sub.2, . . . , 51.sub.n is
determined so as to be substantially equal in the flow rate of the
used paper pulp UPP. Specifically, the outside diameter size of the
pair of beating disks 31, 32 for composing the grinders 30.sub.1,
30.sub.2, . . . , 30.sub.n is determined so as to be larger
gradually from the upstream side to the downstream side.
[0177] In the used paper processing apparatus 1 having such
configuration, the used paper pulp UPP finished in the fragmenting
process in the fragmenting unit 2 flows into the used paper pulp
circulation route 138 from the discharge port 83 of the fragmenting
tank 10, and is sequentially pressurized and beaten by the
plurality of grinders 30.sub.1, 30.sub.2, . . . , 30.sub.n (n units
in the illustrated preferred embodiment) disposed in series, and is
finally pulverized to a desired micron size defined by the beating
gap G.sub.n of the grinder 30.sub.n (to be micro fiber), and is
discharged and collected in the used paper collecting tank 40 by
way of the discharging piping 39.
[0178] The other structure and action are same as in preferred
embodiment 1.
Preferred Embodiment 5
[0179] This preferred embodiment is shown in FIG. 10, and it is
similar to preferred embodiment 1, except that the structure of the
fragmenting unit 2 and others is modified.
[0180] That is, in the used paper processing apparatus 1 of the
preferred embodiment, a shredder unit (shredder means) 110 is
provided in the used paper inlet 81 of the fragmenting tank 10 of
the fragmenting unit 2, and the used paper UP charged into the
inlet 81 is preliminarily shredded by the shredder unit 110, and
the efficiency of fragmenting and beating by the agitating device
11 is enhanced. A specific structure of the shredder unit 110 is
similar to a conventional shredder, and has a basic structure of
cutting the used paper UP into small pieces (double cut type, cross
cut type, etc.).
[0181] This preferred embodiment is similar to preferred embodiment
1, except that the water feeding device (water feeding means) 12
and the dewatering device (dewatering means) 62 provided outside of
the apparatus case 5 of the used paper processing apparatus 1 are
built in the apparatus case 5 as components of the fragmenting unit
2 and the beating unit 3.
[0182] The other structure and action are same as in preferred
embodiment 1.
[0183] Having described preferred embodiments of the present
invention with reference to the accompanying drawings, it is to be
understood that the present invention is not limited to those
precise preferred embodiments, and that various changes, and
modifications may be effected therein by one skilled in the art
without departing from the scope or spirit of the present invention
as defined in the appended claims.
* * * * *