U.S. patent application number 10/568587 was filed with the patent office on 2006-10-26 for vertical filling-packaging device, and method of making bag by the device.
This patent application is currently assigned to Nippon Seiki Co., Ltd.. Invention is credited to Masaki Kumagai, Ysuhito Miyazawa, Toshiaki Nagasawa.
Application Number | 20060236659 10/568587 |
Document ID | / |
Family ID | 34220692 |
Filed Date | 2006-10-26 |
United States Patent
Application |
20060236659 |
Kind Code |
A1 |
Miyazawa; Ysuhito ; et
al. |
October 26, 2006 |
Vertical filling-packaging device, and method of making bag by the
device
Abstract
A vertically filling-packaging device for filling contents,
through a filling mechanism (5), into a packaging bag (P) formed by
forming a film (F) delivered from a film roll (7) into a
cylindrical shape, by longitudinally sealing the film (F) by a
longitudinally sealing mechanism (3), and by laterally sealing the
film (F) by a laterally sealing mechanism (4). The device comprises
a rotating mechanism (41) for rotating a pair of heat seal rolls
(41a) composing the laterally sealing mechanism (4), and a
vertically moving mechanism (42) for moving the heat seal rolls
(41a) upward and downward.
Inventors: |
Miyazawa; Ysuhito; (Nagaoka,
Niigata, JP) ; Kumagai; Masaki; (Nagaoka, Niigata,
JP) ; Nagasawa; Toshiaki; (Nagaoka, Niigata,
JP) |
Correspondence
Address: |
MCDERMOTT WILL & EMERY LLP
600 13TH STREET, N.W.
WASHINGTON
DC
20005-3096
US
|
Assignee: |
Nippon Seiki Co., Ltd.
2-2-34, Higashi-Zach, Nagaoka
Nigata
JP
940-8580
|
Family ID: |
34220692 |
Appl. No.: |
10/568587 |
Filed: |
July 7, 2004 |
PCT Filed: |
July 7, 2004 |
PCT NO: |
PCT/JP04/09631 |
371 Date: |
February 17, 2006 |
Current U.S.
Class: |
53/451 ;
53/551 |
Current CPC
Class: |
B29C 65/745 20130101;
B29C 66/9392 20130101; B29C 65/18 20130101; B29C 66/1122 20130101;
B65B 57/08 20130101; B65B 9/207 20130101; B65B 9/2021 20130101;
B29C 66/4312 20130101; B65B 51/306 20130101; B29C 66/849 20130101;
B29C 66/83513 20130101 |
Class at
Publication: |
053/451 ;
053/551 |
International
Class: |
B65B 9/06 20060101
B65B009/06 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 20, 2003 |
JP |
2003-296233 |
Dec 26, 2003 |
JP |
2003-431918 |
Claims
1. A vertically filling-packaging device for filling contents,
through a filling mechanism, into a packaging bag formed by:
forming a film delivered from a film roll into a cylindrical shape;
longitudinally sealing the film by a longitudinally sealing
mechanism; and laterally sealing the film by a laterally sealing
mechanism, characterized by comprising: a rotating mechanism for
rotating a pair of heat seal rolls composing said laterally sealing
mechanism; and a vertically moving mechanism for moving said heat
seal rolls upward and downward.
2. A vertically filling-packaging device as set forth in claim 1,
characterized: in that the downward movement of said heat seal
rolls is started from the instant when said film is clamped by seal
plates individually attached to said paired heat seal rolls and
having a predetermined seal width; and in that said heat seal rolls
are moved upward at the instant when said seal plates shift from
the clamping state to clamp said film to a non-clamping state,
thereby to return said heat seal rolls to an action original
point.
3. A vertically filling-packaging device as set forth in claim 1,
characterized: in that said film is clamped by seal plates
individually attached to said paired heat seal rolls and having a
predetermined seal width, when said paired heat seal rolls begin to
move downward; and in that said heat seal rolls are moved upward at
the instant when said seal plates shift from the clamping state to
clamp said film to a non-clamping state, thereby to return said
heat seal rolls to an action original point.
4. A vertically filling-packaging device as set forth in any of
claims 1 to 3, further comprising first drive means for
rotationally driving said heat seal rolls, second drive means for
rotationally driving a delivery screw belonging to said vertically
moving mechanism, and control means for electrically controlling
said first and second drive means, characterized in that said
control means controls said first and second drive means so that
the sum of V1+V2 may be substantially equal to a feeding velocity V
of said film, in case said seal plates belonging to said heat seal
rolls have a rotating circumferential velocity V1 and in case said
heat seal rolls have a downward velocity V2 by said vertically
moving mechanism.
5. A vertically filling-packaging device as set forth in any of
claims 1 to 4, characterized: by further comprising a cutting
mechanism disposed on the downstream side of said laterally sealing
mechanism for cutting a packaging bag series formed by said
laterally sealing mechanism; and in that said cutting mechanism
includes a vertically moving mechanism for the cutting mechanism
for moving upward and downward in synchronism with said vertically
moving mechanism of said laterally sealing mechanism.
6. A vertically filling-packaging device as set forth in claim 5,
characterized in that said cutting mechanism cuts said packaging
bag series in case said film is clamped by said seal plates
belonging to said paired heat seal rolls of said laterally sealing
mechanism.
7. A vertically filling-packaging device as set forth in claim 5 or
6, characterized: in that said cutting mechanism includes an
opening/closing mechanism having a pair of film holding plates for
clamping the sealed portion of said packaging bag series for
opening/closing said film holding plates by third drive means,
fourth drive means for moving said cutting mechanism vertically
moving mechanism upward and downward, and fifth drive means for
activating a cutting member to cut said packaging bag series; and
in that control means for electrically controlling said third,
fourth and fifth drive means controls said fourth drive means of
said cutting mechanism vertically moving mechanism so that said
film holding plates may move downward in synchronism with the
downward movement of said packaging bag series, said third drive
means so that said sealed portion of said packaging bag series may
be clamped by said paired film holding plates, said fifth control
means so that said sealed portion may be cut by said cutting member
at a predetermined timing while said sealed portion being held by
said film holding plates, and then said third and fourth drive
means so that said paired film holding plates may perform the
opening action and the upward movement without obstructing the
downward action of the packaging bag series having the seal portion
to be next cut.
8. A vertically filling-packaging device as set forth in claim 7,
characterized in that said control means controls said third and
fourth drive means in said opening/closing mechanism and said
cutting mechanism vertically moving mechanism so that said paired
film holding plates may extend along the shape of a packaging
bag.
9. A vertically filling-packaging device as set forth in claim 1,
characterized in that said filling mechanism performs the feeding
action of said contents continuously.
10. A vertically filling-packaging device as set forth in any of
claims 2, 3, 4 and 6, characterized in that said seal plates are
formed to have a generally arcuate seal face.
11. A bag forming method of a vertically filling-packaging device
for filling contents, through a filling mechanism, into a packaging
bag formed by forming a film delivered from a film roll into a
cylindrical shape, longitudinally sealing the film by a
longitudinally sealing mechanism, and laterally sealing the film by
a laterally sealing mechanism, and including a rotating mechanism
for rotating a pair of heat seal rolls composing said laterally
sealing mechanism, and a vertically moving mechanism for moving
said heat seal rolls upward and downward, characterized by forming
a laterally sealed portion on said film by arranging seal plates
formed to have a predetermined seal width at said paired heat seal
rolls, by clamping said film being continuously delivered by
rotating said paired heat seal rolls, by said seal plates, by
moving said seal plates downward together with the film being
delivered, and by rotating said seal plates continuously during the
downward movement.
12. A bag forming method of a vertically filling-packaging device
as set forth in claim 11, characterized in that said filling
mechanism performs the feeding action of said contents
continuously.
13. A bag forming method of a vertically filling-packaging device
as set forth in claim 11, characterized in that said control means
controls said first and second drive means so chat the sum of V1+V2
may be substantially equal to a feeding velocity V of said film, in
case said seal plates belonging to said heat seal rolls have a
rotating circumferential velocity V1 and in case said heat seal
rolls have a downward velocity V2 by said vertically moving
mechanism.
14. A bag forming method of a vertically filling-packaging device
as set forth in any of claims 11 to 13, characterized in that the
vertically filling-packaging device further comprises a cutting
mechanism disposed on the downstream side of said laterally sealing
mechanism; and in that said cutting mechanism moves upward and
downward in synchronism with said vertically moving mechanism of
said laterally sealing mechanism.
15. A bag forming method of a vertically filling-packaging device
as set forth in claim 14, characterized in that said cutting
mechanism cuts said packaging bag series in case said film is
clamped by said seal plates belonging to said paired heat seal
rolls of said laterally sealing mechanism.
16. A bag forming method of a vertically filling-packaging device
as set forth in claim 14 or 15, characterized: in that said cutting
mechanism includes a pair of film holding plates for clamping a
sealed portion of said packaging bag series, and a cutting member
for cutting said sealed portion; and in that: said film holding
plates move downward in synchronism with the downward movement of
said packaging bag series; said sealed portion of said packaging
bag series is clamped by said paired film holding plates; said
sealed portion is cut by said cutting member at a predetermined
timing while said sealed portion being held by said film holding
plates; and then said paired film holding plates perform the
opening action and the upward movement without obstructing the
downward action of the packaging bag series having the seal portion
to be next cut.
17. A bag forming method of a vertically filling-packaging device
as set forth in claim 16, characterized in that said paired film
holding plates perform the opening action and the upward movement
along the shape of the packaging bag.
Description
RELATED APPLICATION
[0001] This application is the U.S. National Phase under 35 U.S.C.
.sctn. 371 of International Application No. PCT/JP2004/009631,
filed on Jul. 7, 2004, which in turn claims the benefit of Japanese
Application No. 2003-296233, filed on Aug. 20, 2003, and Japanese
Application No. 2003-431918, filed on Dec. 26, 2003, the
disclosures of which Applications are incorporated by reference
herein.
TECHNICAL FIELD
[0002] The present invention relates to a vertically
filling-packaging device for forming a packaging bag by
longitudinally and laterally sealing a film continuously delivered
and for filling contents into the packaging bag, and to a bag
forming method for the device.
BACKGROUND ART
[0003] In the prior art, the packaging bag for filling substances
to be packaged (or contents) such as a liquid, powder or a viscous
substance to seal the contents is generally formed by sealing the
packaging film made of a packaging material of either a film of a
synthetic resin or a laminate of the film and aluminum film,
longitudinally and vertically on the three sides or the four sides.
In order to obtain such packaging bag, there is known the
vertically filling-packaging device for sealing and packaging the
film, which is automatically delivered from a film roll taking up
the film in a roll, on its three or four sides. This vertically
filling-packaging device may be required to obtain a packaging bag
of a large capacity. In this vertically filling-packaging device,
the packaging bag is obtained by sealing the two edges of a folded
film or two overlapped films by a longitudinally sealing mechanism
to form a cylindrical packaging film, by delivering this packaging
film by a film delivering device, by forming a lateral sealed
portion for the bottom portion of the packaging film, while moving
a portion of the film for one pack downward by a box motion type
laterally sealing/(end-sealing) cutting mechanism, and filling the
substance to be packaged into the packaging film, and by returning
the lateral sealing/cutting mechanism again to an original point
position thereby to laterally seal the open side of the packaging
film by the laterally sealing/cutting mechanism. At the time of
cutting the packaging film, the packaging bag series can be cut
separately into the individual packaging bags by activating the
cutter when the sealing/cutting mechanism reaches the lower end.
The vertically filling-packaging device equipped with that box
motion type lateral sealing/cutting mechanism is disclosed in
Patent Publication 1, Patent Publication 2 and so on, for
example.
[0004] Patent Publication 1: JP-A-10-297619; and
[0005] Patent Publication 2: JP-A-10-147304.
[0006] The box motion type laterally sealing mechanism in such
vertically filling-packaging device includes a vertically moving
mechanism for moving a pair of a lateral sealers upward and
downward, and an opening/closing mechanism for opening/closing the
paired lateral sealers. In case the opening/closing mechanism is
"closing", the cylindrical film is clamped by the paired lateral
sealers, and the vertically moving mechanism is moved downward to
form the lateral sealed portion on the cylindrical film. In case
the opening/closing mechanism is "opening", the film is opened, and
the vertically moving mechanism is moved upward to the action
original point.
DISCLOSURE OF THE INVENTION
Problems that the Invention is to Solve
[0007] Here in the box motion type laterally sealing mechanism, the
opening/closing mechanism and the vertically moving mechanism
repeat the "closing".fwdarw."downward
movement".fwdarw."opening".fwdarw."upward movement" so that the
film is intermittently delivered. Therefore, the laterally sealing
mechanism has a problem that it cannot improve the productivity, as
compared with the vertically filling-packaging device having a
rotary laterally sealing mechanism capable of delivering the film
continuously. In the box motion type laterally sealing mechanism,
moreover, the lateral seal is obtained such that the film is
clamped under a predetermined pressure by the paired lateral
sealers while the opening/closing mechanism is between the
"closing" and "opening" states. Since the paired lateral sealers
make face contacts, however, a high seal pressure is required
between the paired lateral sealers for the satisfactory lateral
seals. Anther problem is that the sealing failure easily occurs
when the management of the seal pressure fails. In case, moreover,
the paired lateral sealer performs the heat seal while extruding
the contents such as a liquid being continuously fed, the contents
may be bitten by the heat-sealed portion to cause another problem
that the heat seal fails.
[0008] Therefore, the invention has been conceived in view of the
problems thus far described, and has an object to provide a
vertically filling-packaging device which is excellent in
productivity even in case a packaging bag of a large capacity is
produced and which can suppress the sealing failures of a laterally
sealed portion, and a bag forming method for the device.
Means for Solving the Problems
[0009] In order to solve the aforementioned problems, according to
claim 1 of the invention, there is provided a vertically
filling-packaging device for filling contents, through a filling
mechanism, into a packaging bag formed by: forming a film delivered
from a film roll into a cylindrical shape; longitudinally sealing
the film by a longitudinally sealing mechanism; and laterally
sealing the film by a laterally sealing mechanism, characterized by
comprising: a rotating mechanism for rotating a pair of heat seal
rolls composing the laterally sealing mechanism; and a vertically
moving mechanism for moving the heat seal rolls upward and
downward.
[0010] In the vertically filling-packaging device as set forth in
claim 1, according to claim 2, the downward movement of the heat
seal rolls is started from the instant when the film is clamped by
seal plates individually attached to the paired heat seal rolls and
having a predetermined seal width; and in that the heat seal rolls
are moved upward at the instant when the seal plates shift from the
clamping state to clamp the film to a non-clamping state, thereby
to return the heat seal rolls to an action original point.
[0011] In the vertically filling-packaging device as set forth in
claim 1, according to claim 3, moreover, the film is clamped by
seal plates individually attached to the paired heat seal rolls and
having a predetermined seal width, when the paired heat seal rolls
begin to move downward, and the heat seal rolls are moved upward at
the instant when the seal plates shift from the clamping state to
clamp the film to a non-clamping state, thereby to return the heat
seal rolls to an action original point.
[0012] In the vertically filling-packaging device as set forth in
any of claims 1 to 3, according to claim 4, the vertically
filling-packaging device further comprises first drive means for
rotationally driving the heat seal rolls, second drive means for
rotationally driving a delivery screw belonging to the vertically
moving mechanism, and control means for electrically controlling
the first and second drive means, and the control means controls
the first and second drive means so chat the sum of V1+V2 may be
substantially equal to a feeding velocity V of the film, in case
the seal plates belonging to the heat seal rolls have a rotating
circumferential velocity V1 and in case the heat seal rolls have a
downward velocity V2 by the vertically moving mechanism.
[0013] In the vertically filling-packaging device as set forth in
any of claims 1 to 4, according to claim 5, the vertically
filling-packaging device further comprises a cutting mechanism
disposed on the downstream side of the laterally sealing mechanism
for cutting a packaging bag series formed by the laterally sealing
mechanism, and the cutting mechanism includes a vertically moving
mechanism for the cutting mechanism for moving upward and downward
in synchronism with the vertically moving mechanism of the
laterally sealing mechanism.
[0014] In the vertically filling-packaging device as set forth in
claim 5, according to claim 6, the cutting mechanism cuts the
packaging bag series in case the film is clamped by the seal plates
belonging to the paired heat seal rolls of the laterally sealing
mechanism.
[0015] In the vertically filling-packaging device as set forth in
claim 5 or 6, according to claim 7, the cutting mechanism includes
an opening/closing mechanism having a pair of film holding plates
for clamping the sealed portion of the packaging bag series for
opening/closing the film holding plates by third drive means,
fourth drive means for moving the cutting mechanism vertically
moving mechanism upward and downward, and fifth drive means for
activating a cutting member to cut the packaging bag series, and
control means for electrically controlling the third, fourth and
fifth drive means controls the fourth drive means of the cutting
mechanism vertically moving mechanism so that the film holding
plates may move downward in synchronism with the downward movement
of the packaging bag series, the third drive means so that the
sealed portion of the packaging bag series may be clamped by the
paired film holding plates, the fifth control means so that the
sealed portion may be cut by the cutting member at a predetermined
timing while the sealed portion being held by the film holding
plates, and then the third and fourth drive means so that the
paired film holding plates may perform the opening action and the
upward movement without obstructing the downward action of the
packaging bag series having the seal portion to be next cut.
[0016] In the vertically filling-packaging device as set forth in
claim 7, according to claim 8, the control means controls the third
and fourth drive means in the opening/closing mechanism and the
cutting mechanism vertically moving mechanism so that the paired
film holding plates may extend along the shape of a packaging
bag.
[0017] In the vertically filling-packaging device as set forth in
claim 1, according to claim 9, the filling mechanism performs the
feeding action of the contents continuously.
[0018] In the vertically filling-packaging device as set forth in
any of claims 2, 3, 4 and 6, according to claim 10, the seal plates
are formed to have a generally arcuate seal face.
[0019] In order to solve the aforementioned problems, according to
claim 11, there is provided a bag forming method of a vertically
filling-packaging device for filling contents, through a filling
mechanism, into a packaging bag formed by forming a film delivered
from a film roll into a cylindrical shape, longitudinally sealing
the film by a longitudinally sealing mechanism, and laterally
sealing the film by a laterally sealing mechanism, and including a
rotating mechanism for rotating a pair of heat seal rolls composing
the laterally sealing mechanism, and a vertically moving mechanism
for moving the heat seal rolls upward and downward, characterized
by forming a laterally sealed portion on the film by arranging seal
plates formed to have a predetermined seal width at the paired heat
seal rolls, by clamping the film being continuously delivered by
rotating the paired heat seal rolls, by the seal plates, by moving
the seal plates downward together with the film being delivered,
and by rotating the seal plates continuously during the downward
movement.
[0020] In a bag forming method of a vertically filling-packaging
device as set forth in claim 11, according to claim 12, the filling
mechanism performs the feeding action of the contents
continuously.
[0021] In a bag forming method of a vertically filling-packaging
device as set forth in claim 11, according to claim 13, the control
means controls the first and second drive means so chat the sum of
V1+V2 may be substantially equal to a feeding velocity V of the
film, in case the seal plates belonging to the heat seal rolls have
a rotating circumferential velocity V1 and in case the heat seal
rolls have a downward velocity V2 by the vertically moving
mechanism.
[0022] In a bag forming method of a vertically filling-packaging
device as set forth in any of claims 11 to 13, according to claim
14, the vertically filling-packaging device further comprises a
cutting mechanism disposed on the downstream side of the laterally
sealing mechanism, and the cutting mechanism moves upward and
downward in synchronism with the vertically moving mechanism of the
laterally sealing mechanism.
[0023] In a bag forming method of a vertically filling-packaging
device as set forth in claim 14, according to claim 15, the cutting
mechanism cuts the packaging bag series in case the film is clamped
by the seal plates belonging to the paired heat seal rolls of the
laterally sealing mechanism.
[0024] In a bag forming method of a vertically filling-packaging
device as set forth in claim 14 or 15, according to claim 16, the
cutting mechanism includes a pair of film holding plates for
clamping a sealed portion of the packaging bag series, and a
cutting member for cutting the sealed portion; the film holding
plates move downward in synchronism with the downward movement of
the packaging bag series; the sealed portion of the packaging bag
series is clamped by the paired film holding plates; the sealed
portion is cut by the cutting member at a predetermined timing
while the sealed portion being held by the film holding plates; and
then the paired film holding plates perform the opening action and
the upward movement without obstructing the downward action of the
packaging bag series having the seal portion to be next cut.
[0025] In a bag forming method of a vertically filling-packaging
device as set forth in claim 16, according to claim 17, the paired
film holding plates perform the opening action and the upward
movement along the shape of the packaging bag.
Advantages of the Invention
[0026] The present invention relates to a vertically
filling-packaging device for forming a packaging bag by
longitudinally and laterally sealing a film continuously delivered
and for filling contents into the packaging bag, and can provide a
vertically filling-packaging device which is excellent in
productivity even in case a packaging bag of a large capacity is
produced and which can suppress the sealing failures of a laterally
sealed portion, and a bag forming method for the device.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] [FIG. 1] FIG. 1 is a diagram showing the entire construction
of a vertically filling-packaging device of an embodiment of the
invention.
[0028] [FIG. 2] FIG. 2 is a diagram showing a laterally sealing
mechanism of the embodiment.
[0029] [FIG. 3] FIG. 3 is a diagram showing a cutting mechanism of
the embodiment.
[0030] [FIG. 4] FIG. 4 is a block diagram showing the electric
construction of the vertically filling-packaging device of the
embodiment.
[0031] [FIG. 5] FIG. 5 include diagrams showing the action timings
of the laterally sealing mechanism and the cutting mechanism of the
embodiment.
[0032] [FIG. 6] FIG. 6 include diagrams showing the actions of the
laterally sealing mechanism and the cutting mechanism of the
embodiment.
[0033] [FIG. 7] FIG. 7 is a diagram showing the laterally sealing
mechanism and the cutting mechanism of the embodiment.
[0034] [FIG. 8] FIG. 8 include diagrams showing another embodiment
in the cutting mechanism of the invention.
BEST MODE FOR CARRYING OUT THE INVENTION
[0035] An embodiment of the invention is described with reference
to the accompanying drawings.
[0036] FIG. 1 is an entirely schematic diagram of a vertically
filling-packaging device for the four-side sealing. This vertically
filling-packaging device H is mainly constructed to include a film
feeding-guiding mechanism 1, a film bag folding mechanism 2, a
longitudinally sealing mechanism 3, a laterally sealing mechanism
4, a filling mechanism 5 and a cutting mechanism 6.
[0037] The film feeding-guiding mechanism 1 guides a film F from a
film roll 7 mounted at the side portion of the (not-shown) frame,
into the film bag folding mechanism 2 through a guide roll 1a and a
top roll 1b.
[0038] The film bag folding mechanism 2 is equipped with a turn
guide 2a, by which the film F is folded into halves in its
longitudinal direction.
[0039] The longitudinally sealing mechanism 3 obtains the
cylindrical bag forming film F by longitudinally sealing the open
side and the folded side of the film F, which has been folded into
two halves by the film bag folding mechanism 2, with longitudinally
sealing units 3b belonging to a pair of longitudinally sealing roll
units 3a thereby to form longitudinally sealed portions FH. Here,
the longitudinally sealing roll unit 3a is rotationally driven by
drive means 3c composed of a servomotor.
[0040] The laterally sealing mechanism 4 is provided, as shown in
FIG. 1 and FIG. 2, with a rotating mechanism 41 for rotating a pair
of heat seal roll 41a, and a vertically moving mechanism 42 for
moving the heat seal rolls 41a vertically. The rotating mechanism
41 is equipped with seal plates 41b disposed in the longitudinal
direction at a plurality of positions of the outer circumferences
of the paired heat seal rolls 41a for forming laterally sealed
portions FW. The seal plates 41b are heated by the not-shown
heating members arranged in the heat seal rolls 41a. One heat seal
roll 41a is connected through a gear to the rotating shaft of
rotating mechanism drive means 41c composed of a servomotor, and
the other heat seal roll 41a is connected through a gear to that
one heat seal roll 41a. As the rotating shaft of the rotating
mechanism drive means 41c rotates, therefore, the paired heat seal
rolls 41a rotate such that they can be accelerated or decelerated.
Moreover, the rotating mechanism 41 is equipped with pressure means
41d, which is composed of an air cylinder, a hydraulic cylinder or
the like for applying a predetermined pressure to the film F
clamped by the seal plates 41b belonging to the paired heat seal
rolls 41a. As a result, one heat seal roll 41a is pressed onto the
other heat seal roll 41a.
[0041] The vertically moving mechanism 42 is equipped with delivery
means 42a composed of a delivery screw for moving the paired heat
seal rolls 41a vertically. As this delivery means 42a rotates, a
nut portion 42b can move up and down. This nut portion 42b is
equipped with a mounting unit 42c to be connected to a frame body
41e of the paired heat seal rolls 41a. The rotations are
transmitted to the delivery member means 42a by vertically moving
mechanism drive means 42d composed of a servomotor. A first pulley
42e is mounted on the rotating shaft 42d1 of the vertically moving
mechanism drive means 42d, and a second pulley 42f is mounted on
the rotating shaft 42a1 of the delivery means 42a. By causing a
belt 42g to run between the individual pulleys 42e and 42f, the
rotations of the rotating shaft 42d1 of the vertically moving
mechanism drive means 42d can be transmitted to the delivery means
42a.
[0042] The filling mechanism 5 fills the contents, as fed by the
(not-shown) filling pump, through a filling nozzle 5a into a
packaging bag P having the longitudinally and laterally sealed
portions FH and FW. The packaging bag P has a length of 40 cm and a
width of 25 cm, for example, and fills contents of a capacity of 2
liters or more.
[0043] The cutting mechanism 6 is equipped, as shown in FIG. 1 and
FIG. 3, with a film holding-cutting mechanism 61, and a vertically
moving mechanism (i.e., a vertically moving mechanism for the
cutting mechanism) 62. The film holding-cutting mechanism 61 is
equipped with a pair of film holding plates 61a generally having a
C-shape. These film holding plates 61a are so mounted on a support
plate 61b through mounting portions 61c as can individually move
longitudinally back and forth. The drives of the film holding
plates 61a are controlled by film clamping drive means 61d (i.e.,
third drive means) composed of a servomotor, as will be detailed
hereinafter. The film holding-cutting mechanism 61 is further
equipped at its one film holding plate 61a with a blade (i.e., a
cutting member) 61e for cutting a packaging bag series RP into the
individual packaging bags P. The blade 61e is arranged over the
supporting plate 61b such that it can move, while the packaging bag
series RP is being clamped by the paired film holding plates 61a,
from the back position of one film holding plate 61a to the cutting
position, thereby to cut the packaging bag series RP. The blade 61e
can be moved back and forth under the pneumatic control of a
solenoid valve by the drive source of an air cylinder.
[0044] On the other hand, the vertically moving mechanism 62 is
equipped with delivery means 62a composed of a delivery screw for
moving the support plate 61b vertically. As the delivery means 62a
rotates, a nut portion 62b can move up and down. This nut portion
62b is equipped with a mounting portion 62c for moving the support
plate 61b up and down according to the vertical movements of the
nut portion 62b. The rotations are transmitted to the delivery
member means 62a by vertically moving mechanism drive means (i.e.,
fourth drive means) 62d composed of a servomotor. A first pulley
62e is mounted on the rotating shaft 62d1 of the vertically moving
mechanism driving means 62d, and a second pulley 62f is mounted on
the rotating shaft 62a1 of the delivery means 62a. The rotations of
the rotating shaft 62d1 of the vertically moving mechanism drive
means 62d can be transmitted to the delivery means 62a by causing a
belt 62g to run between the individual pulleys 62e and 62f.
[0045] With the individual units thus far described, the vertically
filling-packaging device H is constructed: by folding back the film
F continuously delivered from the film roll 7, by the film bag
folding mechanism 2 into the cylindrical shape; by longitudinally
sealing the two end portions of the film F folded, with the
longitudinally sealing mechanism 3 to form the bag forming film F
having the longitudinally sealed portions FH; by laterally sealing
the bag films with the laterally sealing mechanism 4 to form the
laterally sealed portions FW for the bottom portions; by filling
contents of a predetermined quantity through the filling mechanism
5 into the bag films having the bottom portions; by laterally
sealing the opening sides of the bag forming films F again with the
laterally sealing mechanism 4 to form the laterally sealed portions
FW thereby to form the packaging bag series RP; and by cutting the
packaging bag series RP by the cutting mechanism 6 at the portions
forming the laterally sealed portions FW thereby to obtain the
individual packaging bags P.
[0046] Next, the electric configuration of the major portions of
the invention is described with reference to FIG. 4. Reference
numeral 20 designates control means composed mainly of a
microcomputer. This control means 20 is configured to include: a
CPU 20a for executing the later-described processing program; a ROM
20b stored with the processing program; a RAM 20c for storing the
operation results or the read results temporarily; and an
input/output (I/O) interface circuit 20d for connecting the
later-detailed input/output units of the individual mechanisms of
the vertically filling-packaging device H. The individual units
20a, 20b, 20c and 20d described above are connected through a bus
20e. Moreover, the control means 20 is provided with nonvolatile
storage means 20f for storing a variety of set values, which are
set by the later-described setting means, in a rewritable
state.
[0047] With the input/output interface circuit 20d, there are
connected as input means: a film delivery state detecting sensor 21
for detecting the rotating state of the top roll 1b composed of the
delivery state detecting roller rotated together with the delivery
of the film F; a regi-mark detecting sensor 22 for detecting a
register mark (as will be called the "regi-mark") M, as shown in
FIG. [[6]] 5, to be printed on the film F; setting means 23 made of
touch panels for setting and displaying a variety of set values;
and a rotation detecting sensor 24 for detecting the rotating state
(or the sealing state) of the sealing plates 41b provided to the
heat seal rolls 41a of the laterally sealing mechanism 4. Here,
each of the detection sensors 21, 22 and 24 is composed of a
transmission type sensor or a proximity sensor. The detection
sensor 21 is enabled to detecting the rotating state of the top
roll 1b by detecting the presence/absence of a slit formed in the
top roll 1b or a detection target member. On the other hand, the
detection sensor 24 detects the seal plates 41b arranged on the
heat seal rolls 41a of the laterally sealing mechanism 4.
[0048] With the input/output interface circuit 20d, moreover, there
are connected as output means through the (not-shown) individual
drivers: the drive means 3c composed of a servomotor for rotating
the heat seal roll 3a of the longitudinally sealing mechanism 3;
the drive means (i.e., the first drive means) 41c composed of a
servomotor for rotating a heat seal roll 4a of the laterally
sealing mechanism 4; the vertically moving mechanism driving means
(i.e., the second drive means) 42d composed of a servomotor for
moving the laterally sealing mechanism 4 up and down; the
vertically moving mechanism drive means 62d composed of a
servomotor for moving the cutting mechanism 6 up and down; the film
clamping drive means 61d composed of a servomotor for moving the
paired film holding plates 61a of the cutting mechanism 6 back and
forth to shift the film F either from the unclamped state to the
clamped state or from the clamped state to the unclamped state; and
a solenoid valve 61f acting as the drive source of a cylinder for
moving the blade 61e of the cutting mechanism 6 back and forth to
change the packaging bag series RP into the individual packaging
bags P.
[0049] Here in the electric configuration thus far described, the
control means 20 can also act to control another mechanism
electrically. In this case, the controlled devices other than the
aforementioned ones are connected with the input/output interface
circuit 20d, but their electric configuration is omitted for
simplifying the description.
[0050] Next, a bag forming method of a bag filling-packaging device
A is detailed with reference to FIG. 5 to FIG. 7. Here, the bag
forming method to be described in the following is exemplified by
the case, in which the longitudinally sealing mechanism 3 is used
as the mechanism for letting off the film F to be delivered from
the film roll 7. In the bag forming method of this embodiment,
moreover, the regi-mark M is formed on the film F so that the
formed position of the regi-mark is laterally sealed and cut by the
laterally sealing mechanism 4 and the cutting mechanism 6.
[0051] In response to a detection signal from the detection sensor
22, the control means 20 controls the drive means 3c of the
longitudinally sealing mechanism 3 to establish a film feeding
velocity V to be set by the setting means 23. The control means
[[22]] 20 decides whether or not the input time period of the
detection signal from the detection sensor 22 is inputted for a
constant period based on the film feeding velocity V, so that the
film F can be fed out at a synchronized velocity by controlling the
acceleration/deceleration of the drive means 3c on the basis of the
decision result.
[0052] The control means 20 sets the rotating velocity of the heat
seal rolls 41a of the laterally sealing mechanism 4, that is, a
rotating circumferential velocity V1 of the heat seal rolls 41a.
The control means 20 determines the rotating circumferential
velocity V1 of the seal plates 41b of the laterally sealing
mechanism 4 from a mechanically structural distance L1 from the
arranged position of the regi-mark detection sensor 22 to the
laterally sealing position by the laterally sealing mechanism 4,
the size (i.e., the length of the packaging bag P in the delivering
direction or the forming interval of the regi-mark M) L2 of the
packaging bag P, and the film feeding velocity V. In case the
downward velocity of the heat seal rolls 41a by the vertically
moving mechanism 42 of the laterally sealing mechanism 4 is
designated by V2, the rotating circumferential velocity V1 is so
set that the sum (V1+V2) of itself and the downward velocity V2 may
be larger than the film feeding velocity V or may not be smaller
than the film feeding velocity V. Moreover, the distance L1 is such
a parameter as is mechanically structurally predetermined, and the
size L2 is a variable set by the setting means 23. Here, the
control means 20 decides the validity of the rotating
circumferential velocity y1 on the basis of the input coming from
the rotation detection sensor 24 for detecting the rotating state
of the heat seal rolls 41a of the laterally sealing mechanism 4,
and adjusts the acceleration/deceleration of the drive means 41c on
the basis of the decision result.
[0053] The control means 20 controls the drive means 41c of the
heat seal rolls 41a of the laterally sealing mechanism 4 thereby to
establish the rotating circumferential velocity V1, which has been
calculated by sealing the formed position of the regi-mark M of the
film F to be delivered, with the seal plates 41b. FIG. 5(a) shows a
drive waveform S1 of the drive means 41c in the rotating mechanism
41 of the laterally sealing mechanism 4, and a constant velocity
control time t1 in the drive waveform S indicates that the formed
area of the regi-mark M of the film F is laterally sealed with the
width of the seal plates 41b. For the time t1, as shown in FIG.
6(a), the laterally sealing mechanism 4 shifts the seal plates 41b
from a sealing state A to a sealing state C thereby to form the
laterally sealed portions FW in the bag forming film F.
[0054] Here are detailed the seal plates 41b belonging to the heat
seal rolls 41a of the laterally sealing mechanism 4. The seal
plates 41b are formed to have arcuate seal faces, as shown in FIG.
6(a). The seal plates 41b is enabled by the squeezing action to
extrude the contents being fed without interruption through the
filling mechanism 5 into the bag forming film F, from the laterally
sealed portions FW of the film F into the bag forming film F which
is positioned on the upstream side (i.e., oppositely of the
delivering direction of the film F). As a result, the lateral seal
can be so made that the laterally sealed portion FW may not bite
the aforementioned contents.
[0055] The control means 20 controls, on the basis of the drive
waveform S1, the drive means 41c in the rotating mechanism 41 of
the laterally sealing mechanism 4 so that the film (or the bag
forming film F) F is laterally sealed (or heat-sealed) by the seal
plates 41b arranged on the heat seal rolls 41a, and controls the
vertically moving mechanism drive means 42d of the vertically
moving mechanism 42 of the laterally sealing mechanism 4, as shown
in FIG. 5(b). FIG. 5(b) shows a drive waveform S2 of the vertically
moving mechanism drive means 42d of the laterally sealing mechanism
4. The control means 20 starts the downward movement of the
vertically moving mechanism 42 earlier than the seal timing by the
laterally sealing mechanism 4 (i.e., the timing to clamp the film F
with the seal plates 41b), and controls the vertically moving
mechanism drive means 42d of the vertically moving mechanism 42 so
that the synchronous state may be established before the seal
timing (as referred to FIG. 6(a)) by the seal plates 41b. After the
end of the laterally seal in the synchronous state (i.e., on and
after the sealing state C of FIG. 6(a)), the control means 20
further controls the vertically moving mechanism drive means 42d of
the vertically moving mechanism 42 so that the upward moving action
of the vertically moving mechanism 42 may be started to return the
vertically moving mechanism 42 to the original position. The
downward velocity V2 of the vertically moving mechanism 42 is so
set that the sum (V1+V2) of itself and the rotating circumferential
velocity V1 of the seal plates [[1]] 41b may be larger than the
film feeding velocity V or may not be smaller than the film feeding
velocity [[Va]] V. Here, the upward velocity V3 of the vertically
moving mechanism 42 may be in time for the timing, at which the
position to have the next regi-mark M formed is laterally
sealed.
[0056] As described above, the control means 20 controls the
individual drive means 41c and 42d of the laterally sealing
mechanism 4 so that the sum of the rotating circumferential
velocity V1 of the seal plates 41b provided to the heat seal rolls
41a and the downward velocity V2 of the heat seal rolls 41a by the
vertically moving mechanism 42 may be substantially equal to the
feeding velocity V of the film.
[0057] Next, the cutting method of the cutting mechanism 6 is
described. Here, FIG. 6(b) shows the motions of the cutting
mechanism 6 in synchronism with the vertical movements of the
sealing mechanism 4. In FIG. 6(b): arrow D indicates the
downward/upward motions of the film holding-cutting mechanism 61;
arrow E indicates the opening/closing motions of the paired film
holding plates 61a; and arrow F indicates the forward/backward
motions of the blade 61e of the film cutting holding-cutting
mechanism 61.
[0058] The control means 20 controls the drive means 61d in the
film holding-cutting mechanism 61 of the cutting mechanism 6 in
synchronism with the drive waveform S1 of the drive means 41c in
the rotating mechanism 41 of the laterally sealing mechanism 4.
FIG. 5(c) shows a drive waveform S3 for driving the drive means 61d
of the film holding-cutting mechanism 61 in synchronism with the
drive waveform S1 of the drive means 41c. In synchronism with the
timing (i.e., the seal state A of FIG. 6(a)), at which the film F
is clamped by the paired seal plates 41b to start the lateral
seal), as indicated by the drive waveform S3 of the drive means
61d, the control means 20 causes the paired film holding plates 61a
to close (as indicated by the arrow E of FIG. 6(b)) thereby to
clamp the film F. In synchronism with the timing (i.e., the seal
state C of FIG. 6(a)), at which the seal plates 41b leave the film
F to end the lateral seal), the control means 20 causes the paired
film holding plates 61a (as indicated by the arrow E of FIG. 6(b))
thereby to release the film F.
[0059] In synchronism with the drive waveform S2 of the vertically
moving mechanism drive means 42d in the vertically moving mechanism
42 of the laterally sealing mechanism 4, moreover, the control
means 20 controls the vertically moving mechanism drive means 62d
in the vertically moving mechanism 62 of the cutting mechanism 6.
FIG. 5(d) shows a drive waveform S4 for driving the vertically
moving mechanism drive means 62d in the vertically moving mechanism
62 of the cutting mechanism 6. In synchronism with the timing, at
which the downward movement of the vertically moving mechanism 42
of the laterally sealing mechanism 4 is started, the control means
20 starts (as indicated by the arrow D of FIG. 6(b)) the downward
movement of the vertically moving mechanism 62 of the cutting
mechanism 6. The control means 20 controls the vertically moving
mechanism drive means 62d of the vertically moving mechanism 62 so
that the synchronous state may be established before the timing, at
which the film F is clamped by the paired film holding plates 61a
of the film holding-cutting mechanism 61. A downward velocity V4 at
this time is substantially equal to the film feeding velocity
[[Va]] V.
[0060] The control means 20 activates the blade 61e of the film
holding-cutting mechanism 61 while being timed to the action of the
film holding plates 61a. FIG. 5(e) shows a drive waveform S5 of the
solenoid valve 61f for moving the blade 61e back and forth. When
the bag forming film F is laterally sealed in the sealed state B of
FIG. 6(a) by the laterally sealing mechanism 4 and when the film
forming bag F is clamped (as referred to the arrow E of FIG. 5(c)
and FIG. 6(b)) by the paired film holding plates 61a of the film
holding-cutting mechanism 61 so that the bag forming film F and the
packaging bag series RP are held by the laterally sealing mechanism
4 and the cutting mechanism 6, respectively, the control means 20
activates the solenoid valve 61f to move the blade 61e forward
thereby to cut the laterally sealed portion FW of the film F (as
indicated by the arrow F of FIG. 6(b)), and then controls the
solenoid valve 61f (i.e., a fifth drive means) to move the blade
61e backward (as indicated by the arrow F of FIG. 6(b)). The
control means 20 moves the blade 61e forward, while aiming at the
general center of the laterally sealed portion FW formed by the
seal plates 41b of the laterally sealing mechanism 4, as apparent
from the drive waveform S5, thereby to cut the film F. After the
packaging bag series RP was cut by the film holding-cutting
mechanism 61, the control means 20 starts the upward movement of
the vertically moving mechanism 62 and returns the vertically
moving mechanism 62 to the original position (as indicated by the
arrow D of FIG. 6(b)). The upward velocity V5 at this time may be
in time, at the aforementioned original position, for clamping the
position to form a next lateral seal by the paired film holding
plates G1a.
[0061] Here, the control means 20 determines the cutting timing on
the basis of a mechanically structural distance L3 from the
arranged position of the regi-mark detection sensor 22 to the
position to be cut by the cutting mechanism 6, the size L2 of the
packaging bag P, and the film feeding velocity [[Va]] V. Moreover,
the distance L3 is the parameter which is mechanically structurally
predetermined.
[0062] The vertically filling-packaging device H is enabled to
acquire the packaging bag P of a large capacity type by executing
the aforementioned processing without interrupting the feed of the
film F.
[0063] Next, another embodiment of the cutting mechanism 6 is
described with reference to FIG. 8, but the detailed description of
portions similar or corresponding to those of the aforementioned
embodiment is omitted by designating them by the common reference
numerals. FIG. 8 presents actions of the film holding-cutting
mechanism 61 and the vertically moving mechanism 62 in the cutting
mechanism 6. It is assumed that the position of the cutting
mechanism 6 shown in FIG. 8(a) is the original position. The
control means 20: controls the vertically moving mechanism drive
means 62d of the vertically moving mechanism 62 so that the paired
film holding plates 61a may move downward according to the downward
movement of the packaging bag series RP; controls the film clamping
drive means 61d (FIG. 8(a) so that the laterally sealed portion FW
(i.e., the sealed portion) of the packaging bag series RP may be
clamped by the paired film holding plates 61a; controls (ON) the
solenoid valve 61f (FIG. 8(b)) so that the laterally sealed portion
FW may be cut generally at its center with the blade 61b at a
predetermined timing of the laterally sealed portion FW being
clamped by the film holding plates 61a; and then controls the film
clamping drive means 61d and the vertically moving mechanism drive
means 62d (FIG. 8(c) and FIG. 8(d)) so that the paired film holding
plates 61a may act in the opening direction (as will be called the
"opening action") and may move upward without obstructing the
downward movement of the packaging bag series RP having the
laterally sealed portion FW to be next cut. After this, the control
means 20 controls the film clamping drive means 61d and the
vertically moving mechanism drive means 62d (FIG. 8(e) so that the
film holding-cutting mechanism 61 and the vertically moving
mechanism 62 may be returned to their respective original
positions. In case the delivery velocity of the film F (i.e., the
downward velocity of the packaging bag series RP) is high, the
paired film holding plates 61d may be moved upward after the end of
or during the opening action of the paired film holding plates
61d.
[0064] In the actions to open and move upward the film holding
plates 61a, the control means 20 performs the opening action and
the upward moving action along the mode of the packaging bag series
RP having the laterally sealed portion FW to be next cut, so that
the film holding plates 61a can act along the mode of the packaging
bag series RP without any contact with the packaging bag series RP.
Therefore, it is possible to shorten the cycle time, for which the
control means 20 arrives at the action point from an original point
position of the cutting mechanism 6 and then returns to the
original point position, thereby to improve the productivity of the
vertically filling-packaging device H for attaining the packaging
bag P of a large capacity.
[0065] This vertically filling-packaging device H and its bag
forming method comprises the rotating mechanism 41 for rotating the
paired heat seal rolls 41a or the laterally sealing mechanism 4,
and the vertically moving mechanism 42 for moving the paired heat
seal rolls 41a vertically. The seal plates 41b formed to obtain the
predetermined seal width are individually arranged on the paired
heat seal rolls 41a. The laterally sealed portions FW are formed at
the bag forming film F by clamping the film F being continuously
delivered by rotating the paired heat seal rolls 41a, between the
seal plates 41b, by moving the seal plates 41b downward together
with the film F being delivered, and by rotating the seal plates
41b continuously during the downward moving action. As compared
with the vertically filling-packaging device equipped with the
laterally sealing mechanism of the box motion type of the prior
art, the packaging bag P of the large capacity can be obtained
while delivering the film F continuously without any interruption.
As a result, it is possible to provide the vertically
filling-packaging device of excellent productivity for obtaining
the large-capacity type packaging bag. Moreover, the laterally
sealed portions FW can be formed by using the rotating mechanism 41
of the laterally sealing mechanism 4 at the sealing step
accompanied by the squeezing action of the seal plates 41b, thereby
to suppress occurrence of the sealing failure of the laterally
sealed portions FW.
[0066] The vertically filling-packaging device further comprises
the drive means 41c for rotationally driving the heat seal rolls
41a of the laterally sealing mechanism 4, and the vertically moving
mechanism drive means 42d for rotationally driving the delivery
screw belonging to the vertically moving mechanism 42 of the
laterally sealing mechanism 4. The control means 20 sets the sum
(V1+V2) and the film feeding velocity V substantially equal to each
other, in case the seal plates 41b belonging to the heat seal rolls
41a of the longitudinally laterally sealing mechanism 4 has the
rotating circumferential velocity V1 and in case the heat seal
rolls [[41b]] 41a of the vertically moving mechanism 42 of the
longitudinally laterally sealing mechanism 4 has the downward
velocity V2. This setting eliminates disadvantages such as the
formation of wrinkles at the time of laterally sealing the film F
being continuously delivered, the distortion of the packaging
shape, as might otherwise be caused when the film F is pulled, or
the dispersion of the cutting position of the cutting mechanism 6
arranged at the latter stage.
[0067] The vertically filling-packaging device further comprises
the cutting mechanism 6 on the downstream side of the laterally
sealing mechanism 4, and this cutting mechanism 6 is provided with
the vertically moving mechanism 62 for moving up and down in
synchronism with the vertically moving mechanism 42 of the
laterally sealing mechanism 4. The cutting mechanism 6 is
controlled to cut the packaging bag series RP in case the film F is
clamped by the seal plates 41b belonging to the paired heat seal
rolls 41a of the laterally sealing mechanism 4. In the case of
cutting the packaging bag series RP of a large capacity, the
pulsations at the cutting time can be suppressed to ensure a
satisfactory cutting.
[0068] Moreover, the seal faces of the seal plates 41b belonging to
the laterally sealing mechanism 4 are made arcuate so that the
contents can be extruded into the bag forming film F positioned
below, by the squeezing actions of the paired seal plates 41b even
in case the contents exist at the position to form the laterally
sealed portions FW when these laterally sealed portions are to be
formed. It is possible to obtain the laterally sealed portions FW
of a satisfactory appearance without any bite of the contents by
the laterally sealed portions FW.
[0069] Since the feeding action of the contents by the filling
mechanism 5 can be continuously made, the intermittent filling
actions of the filling pump for feeding the contents can be
eliminated to improve the productivity of the vertically
filling-packaging device for obtaining the packaging bag of the
large capacity type.
[0070] Moreover, the cutting mechanism 6 causes the film holding
plates 61a to perform the opening actions and the upward moving
actions of the film holding plates 61a along the shape of the
packaging bag series RP having the laterally sealed portions FW to
be cut next, so that the film clamping holding plates 61a can be
moved along the shape of the packaging bag series RP without any
contact with the packaging bag series RP. It is, therefore,
possible to shorten the cycle time of the cutting mechanism 6
thereby to improve the productivity of the vertically
filling-packaging device H for obtaining the packaging bag P of the
large capacity.
[0071] In the embodiment of the invention, the respective
vertically moving mechanisms 42 and 62 of the laterally sealing
mechanism 4 and the cutting mechanism [[5]] 6 are so constructed as
to be driven independently of each other. However, the invention
may also use a cam mechanism for acting in synchronism with the
vertical movements of the laterally sealing mechanism 4.
[0072] After the paired heat seal rolls 41a started to move
downward, according to the embodiment of the invention, the film F
is clamped by the seal plates 41b individually belonging to the
paired heat seal rolls 41a and having the predetermined seal width,
and the heat seal rolls 41a are moved upward at the instant when
the seal plates 41b shift from the clamping state to clamp the film
F to the non-clamping state, thereby to return to their original
points. In the invention, however, the downward actions of the heat
seal rolls 41a may be started from the instant when the film F is
clamped by the seal plates 41b individually belonging to the paired
heat seal rolls 41a, and the heat seal rolls 41a may be moved
upward at the instant when the seal plates 41b shift from the
clamping state to clamp the film F to the non-clamping state
thereby to return the heat seal rolls 41a to the action original
point.
[0073] Moreover, the embodiment of the invention is exemplified by
the case, in which the film F having the regi-mark M formed is used
to form the laterally sealed portion FW at the position having the
regi-mark M formed, but can also be applied to the case using the
film F having no regi-mark M. In the control method of the
laterally sealing mechanism 4 of this case, the rotating
circumferential velocity V1 of the seal plates 41b is determined on
the basis of the film feeding velocity V, the size L2 of the
packaging bag and the spacing between the plural seal plates 41b
arranged to the heat seal rolls [[41b]] 41a, and the rotations of
the heat seal rolls 41a are controlled with reference to the
detection signal coming from the rotation detection sensor 24 for
detecting the rotating states of the seal plates 41b of the
laterally sealing mechanism 4. In the method for controlling the
cutting mechanism 6, on the other hand, the cutting timing of the
cutting mechanism 6 is determined on the basis of the film feeding
velocity V, the size L2 of the packaging bag, and the mechanically
structural distance from the laterally sealing position by the
laterally sealing mechanism 4 to the cutting position by the
cutting mechanism 6, so that the film holding-cutting mechanism 61
in the cutting mechanism 6 is controlled with reference to the
detection signal coming from the rotation detection sensor 24 for
detecting the rotating state of the seal plates 41b of the
laterally sealing mechanism 4. In the control method of the
vertically moving mechanism 62 of the cutting mechanism 6, on the
other hand, the control is synchronized with the vertically moving
mechanism 42 of the laterally sealing mechanism 4.
INDUSTRIAL APPLICABILITY
[0074] The present invention can be applied to the vertically
filling-packaging device for three-side sealing or the four-side
sealing, and to the vertically filling-packaging device for forming
a cylindrical bag by folding one film sheet into halves, by
overlaying two film sheets, or through a sailor's plate.
* * * * *