U.S. patent application number 10/730558 was filed with the patent office on 2005-05-26 for transporter for delivering secondary supply of inserts to a packet of primary multiple packet inserter apparatus.
This patent application is currently assigned to Kansa Technology, LLC. Invention is credited to Nilsson, Sten, Potter, Marvin.
Application Number | 20050110208 10/730558 |
Document ID | / |
Family ID | 34595331 |
Filed Date | 2005-05-26 |
United States Patent
Application |
20050110208 |
Kind Code |
A1 |
Nilsson, Sten ; et
al. |
May 26, 2005 |
Transporter for delivering secondary supply of inserts to a packet
of primary multiple packet inserter apparatus
Abstract
A method and apparatus for transporting articles comprising
single sheets or short stacks of single sheets from a collating
machine to a high speed newspaper and/or commercial inserter
utilizes a conveyor apparatus intermediate the collator and
inserter that twists or rotates the articles through one-quarter
turn as they move in succession and at high speed along their path
of travel. The one-quarter turn rotation is carried out around an
axis that extends longitudinally of the path of travel of the
articles from the collator to the inserter. Special twister belts
are utilized to grip and convey the articles as they pass through
the article rotating portion of the apparatus. Such quarter-turn
rotation orients the articles into a radial orientation for direct
insertion into rapidly moving pockets of the inserter machine which
are preferably moving in a circular path of travel in a plane that
is perpendicular to the inserting path of travel of the articles.
The articles may have also been previously upended from a flat
stack into an edgewise or upended condition if the initial collator
is of the type which dispenses the articles on a horizontal moving
conveying surface. At all times throughout their conveyance from
the collator to the inserter, the articles are maintained under
firm control despite traveling at high speeds and significant
distances.
Inventors: |
Nilsson, Sten; (Emporia,
KS) ; Potter, Marvin; (Emporia, KS) |
Correspondence
Address: |
HOVEY WILLIAMS LLP
2405 GRAND BLVD., SUITE 400
KANSAS CITY
MO
64108
US
|
Assignee: |
Kansa Technology, LLC
|
Family ID: |
34595331 |
Appl. No.: |
10/730558 |
Filed: |
December 8, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60525863 |
Nov 26, 2003 |
|
|
|
Current U.S.
Class: |
271/184 |
Current CPC
Class: |
B65H 2301/3113 20130101;
B65H 2301/432 20130101; B65H 2301/33212 20130101; B65H 2301/42262
20130101; B65H 29/12 20130101; B65H 31/3027 20130101; B65H 39/045
20130101; B65H 39/065 20130101 |
Class at
Publication: |
271/184 |
International
Class: |
B65H 029/00 |
Claims
1. In conveyor apparatus for transporting generally flat articles,
each comprising at least one flexible sheet, in succession from a
source of supply to an inserting station of a top-loading newspaper
and/or commercial inserting machine, the improvement comprising: an
article rotating portion operable while advancing each successive
article along a path of travel toward the inserting station to
rotate the article a predetermined amount about a longitudinal axis
extending axially of said path of travel to reorient the article
for presentation to the inserting station.
2. In conveyor apparatus as claimed in claim 1, said article
rotating portion including opposed lengths of conveyor belts
disposed to receive and grip each article therebetween as they
advance the article along said path of travel, said opposed
conveyor belt lengths being twisted about said longitudinal axis of
the path of travel.
3. In conveyor apparatus as claimed in claim 2, each article having
a width measured in a direction transverse to said path of travel,
said opposed conveyor belt lengths each having a width measured in
a direction transverse to said path of travel that is narrower than
the width of each article, said opposed conveyor belt lengths being
disposed to engage each article generally centrally thereof.
4. In conveyor apparatus as claimed in claim 2, said article
rotating portion further including stationary guides adjacent said
path of travel configured and arranged to engage and assist in
rotating each article as it is advanced by said opposed conveyor
belt lengths.
5. In conveyor apparatus as claimed in claim 4, said guides
comprising a plurality of opposed, elongated guide rods extending
longitudinally of said path of travel.
6. In conveyor apparatus as claimed in claim 5, said opposed
conveyor belt lengths and said opposed, elongated guide rods being
adapted to rotate each article one-quarter turn.
7. In conveyor apparatus as claimed in claim 6, each of said
articles having an article axis that is normal to the plane of the
sheet in the article, said source of supply being adapted to
present the articles to the conveyor apparatus with said article
axis extending upwardly, said conveyor apparatus further comprising
an article turning portion operable while advancing the articles
along said path of travel to turn each article until its article
axis extends generally horizontally.
8. In conveyor apparatus as claimed in claim 7, said article
turning portion including opposed stretches of conveyor belts
disposed to receive and grip each article therebetween as they
advance the article along said path of travel, said opposed
conveyor belt stretches initially extending generally horizontally
and thereafter turning downwardly to turn the article until its
article axis extends generally horizontally.
9. In conveyor apparatus as claimed in claim 8, said opposed
conveyor belt stretches extending upwardly after initially
extending generally horizontally and before turning downwardly.
10. In conveyor apparatus as claimed in claim 1, each of said
articles having an article axis that is normal to the plane of the
sheet in the article, said source of supply being adapted to
present the articles to the conveyor apparatus with said article
axis extending upwardly, said conveyor apparatus further comprising
an article turning portion operable while advancing the articles
along said path of travel to turn each article until its article
axis extends generally horizontally.
11. In conveyor apparatus as claimed in claim 10, said article
turning portion including opposed stretches of conveyor belts
disposed to receive and grip each article therebetween as they
advance the article along said path of travel, said opposed
conveyor belt stretches initially extending generally horizontally
and thereafter turning downwardly to turn the article until its
article axis extends generally horizontally.
12. In conveyor apparatus as claimed in claim 11, said opposed
conveyor belt stretches extending upwardly after initially
extending generally horizontally and before turning downwardly.
13. In conveyor apparatus as claimed in claim 1, said path of
travel of the articles being upwardly arched.
14. In conveyor apparatus as claimed in claim 1, said article
rotating portion being operable to rotate each article one-quarter
turn.
15. In conveyor apparatus as claimed in claim 1, further comprising
an article discharging portion immediately downstream from said
article rotating portion and operable to maintain each rotated
article in its rotated condition as it continues along said path of
travel and is presented to said inserting station.
16. In conveyor apparatus as claimed in claim 15, said article
discharging portion including a pair of opposed, cooperating
discharge conveyor assemblies operable to grip each successive
article therebetween and to advance the article along said path of
travel upon exiting from said article rotating portion, said
discharge conveyor assemblies being supported in a manner that
permits the direction of article discharge therefrom to be
angularly adjusted.
17. In a method for use in transporting generally flat articles,
each comprising at least one flexible sheet, in succession from a
source of supply to an inserting station of a top-loading newspaper
and/or commercial inserting machine, the improvement comprising:
conveying the articles in succession along a path of travel toward
the inserting station; and while the articles are advancing along
the path of travel, rotating each article a predetermined amount
about a longitudinal axis extending axially of the path of travel
to orient the article for presentation to the inserting
station.
18. In a method as claimed in claim 17, each article being rotated
approximately one-quarter turn.
19. In a method as claimed in claim 17, said rotating step
including gripping the article between a pair of opposed lengths of
elongated, driven conveyor belts that are twisted about their
longitudinal axes.
20. In a method as claimed in claim 17, said opposed conveyor belt
lengths being substantially narrower than the width of each article
and being disposed to engage each article generally centrally
thereof.
21. In a method as claimed in claim 19, said rotating step further
including engaging each article with stationary guides while the
article is being advanced and rotated by the opposed conveyor belt
lengths to assist in rotating the article.
22. In a method as claimed in claim 17, said path of travel being
upwardly arched, presenting an upwardly directed first leg spaced
horizontally from the inserting station, a second leg in which the
path of travel transitions from upwardly directed to downwardly
directed, and a downwardly directed third leg vertically aligned
with said inserting station.
23. In a method as claimed in claim 22, said rotating step being
carried out within said third leg of the path of travel.
24. In a method as claimed in claim 17, each of said articles
having an article axis that is normal to the plane of the sheet in
the article, said source of supply being adapted to initially
present the articles with said article axis extending upwardly,
further comprising while the articles are advancing along the path
of travel, turning each article until its article axis extends
generally horizontally.
25. In a method as claimed in claim 24, said turning of the
articles being carried out upstream from said rotating step.
Description
RELATED APPLICATIONS
[0001] This application claims the priority benefit of provisional
patent application No. ______ filed Nov. 26, 2003, said provisional
application being hereby incorporated by reference into the present
specification.
TECHNICAL FIELD
[0002] This invention relates to the field of handling equipment
for thin, flimsy sheet articles such as advertising materials,
fliers and other inserts for printed newspaper sections and, more
particularly, to conveying apparatus especially adapted for
transporting such articles as individual sheets or short stacks
thereof at high speeds and in succession from a source of supply
such as an in-line collator to the inserting station of a
high-speed newspaper inserting machine.
BACKGROUND AND SUMMARY
[0003] Newspaper and/or commercial inserting machines that stuff
multi-page inserts into opened, generally V-shaped newspaper or
similar jackets moving at high speeds are well-known in the
industry. However, a particular problem is sometimes encountered
when it is desired to stuff thin, flimsy single sheets or stacks of
single sheets into the jackets at the desired high line speeds.
Conventional hopper-type feeders available in association with
conventional machines sometimes have a difficult time dispensing
the individual sheets and are largely incapable of handling
collated stacks of the individual sheets, especially at the
required high line speeds. For capacity reasons, it would be very
desirable to collate a number of different individual sheets into a
short stack and then stuff the assembled stacks in succession into
corresponding jackets, as this would avoid the need to add an
additional dispensing hopper and inserting station at the inserting
machine for each different sheet.
[0004] The present invention is directed to apparatus that replaces
a hopper or other feeder at one of the loading stations of a
multi-station newspaper and/or commercial inserting machine and
which has particular utility in feeding articles that comprise
single sheets or stacks of single sheets to the loading station at
high speeds while maintaining complete control over the articles
throughout their entire path of travel from a source of supply into
the open newspaper or other V-shaped jacket product moving past the
loading station. Although the principles of the present invention
have particular utility in connection with circular, carousel-type
inserting machines such as the well known HARRIS/Heidelberg/AM
Graphics brand circular machine in which a series of product
holding buckets or pockets move sequentially beneath loading
stations having overhead feeders, it will be appreciated that the
present invention is not limited to use with the HARRIS-type
machine or to a carousel-type machine for that matter. It will also
be appreciated that the while the present invention is particularly
suited for use in connection with an inline collating machine as
the source of supply, such as the KANSA MULTI-FEEDER available from
Kansa Technology LLC of Emporia, Kans., the present invention is
not limited to use of a MULTI-FEEDER as the source of supply.
[0005] In a preferred embodiment, the present invention includes a
conveying apparatus and method wherein the single-sheet or
multiple-sheet articles are conveyed along a path of travel from
the source of supply, and in the process of such conveyance are
turned or rotated a certain distance about the longitudinal axis of
the path of travel so as to reposition and properly orient the
articles for insertion into the moving pockets of the inserting
machine. In a preferred embodiment, the articles are rotated
approximately one-quarter turn to accomplish the necessary
reorientation. Preferably, such rotational action is carried out by
a pair of high-speed, relatively narrow and opposed conveyor belt
lengths that are twisted about their respective longitudinal axes
and which clamp and convey the articles along the path of travel
while at the same time causing the rotating action. Special guide
rods located alongside the path of travel of the articles and in
close association with the twisted belt lengths engage the articles
as they are being operated upon by the belts to assist in carrying
out the rotating action. Other cooperating conveyor belt stretches
upstream from the article-rotating portion of the apparatus may be
arranged in such a manner that articles coming from the source of
supply in a horizontal disposition are essentially turned on end
and reoriented for edge-wise vertical delivery down into the
top-loading inserting machine. The conveyor apparatus may be
upwardly arched for carrying out such up-ending of the articles so
that the path of travel of the articles includes and initial
upwardly directed leg, a transition leg in which the path of travel
changes from upwardly to downwardly, and a third downwardly moving
leg immediately above the loading station.
[0006] Even though the articles may be conveyed over a fairly
lengthy path of travel compared to a short path of travel available
with overhead feeding hoppers, the present invention provides a way
of maintaining firm control over the articles throughout the
entirety of the transporting path of travel. A discharging portion
of the conveyor apparatus may be provided immediately downstream
from the article rotating portion thereof for taking control of the
newly reoriented articles and discharging them in rapid succession
down into the receiving pockets that move successfully therepast
and therebelow.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a fragmentary top plan view of conveyor apparatus
constructed in accordance with the principles of the present
invention and illustrated in association with a circular newspaper
or other product stuffing machine and an in-line collator for
supplying individual sheets or stacks of individual sheets to the
conveyor apparatus;
[0008] FIG. 2 is a front elevational view thereof;
[0009] FIG. 3 is a fragmentary, slightly enlarged, vertical cross
sectional view thereof with shields and end panels of the apparatus
removed to reveal details of construction;
[0010] FIG. 4 is an enlarged fragmentary horizontal cross sectional
view through the apparatus taken substantially along line 4-4 of
FIG. 2;
[0011] FIG. 5 is a fragmentary, vertical cross sectional view
through the apparatus taken substantially along line 5-5 of FIG.
4;
[0012] FIG. 6 is a fragmentary, vertical cross sectional view
through the apparatus taken substantially along line 6-6 of FIG.
5;
[0013] FIG. 7 is an enlarged front elevational view of the article
rotating or twisting portion of the apparatus with sidewalls and
housing portions removed to reveal internal details of
construction;
[0014] FIG. 8 is an enlarged, fragmentary right side elevational
view of the article rotating or twisting portion of the apparatus
with sidewalls, panels and housing removed to reveal details of
construction;
[0015] FIG. 9 is an enlarged, fragmentary rear elevational view of
the article rotating or twisting portion of the apparatus with
panels, sidewalls and housings removed to reveal details of
construction;
[0016] FIG. 10 is an enlarged, fragmentary left side elevational
view of the article rotating or twisting portion with panels, walls
and housing removed to reveal details of construction;
[0017] FIG. 11 is a horizontal cross sectional view through the
article rotating or twisting portion of the apparatus taken
substantially along line 11-11 of FIG. 10;
[0018] FIG. 12 is a fragmentary, vertical cross sectional view
through the article rotating apparatus taken substantially along
line 12-12 of FIG. 11;
[0019] FIG. 13 is a fragmentary, vertical cross sectional view of
the article rotating or twisting apparatus taken substantially
along line 13-13 of FIG. 11;
[0020] FIG. 14 is a fragmentary, horizontal cross sectional view of
the article rotating or twisting portion of the apparatus taken
substantially along line 14-14 of FIG. 12;
[0021] FIG. 15 is a fragmentary horizontal cross sectional view
through the article rotating or twisting apparatus showing guides
for the twisting and conveying belt lengths in that region of the
machine;
[0022] FIG. 16 is a fragmentary horizontal cross sectional view
through the article rotating or twisting apparatus from a point
above the twister belt guides of FIG. 15 and illustrating guiding
mechanism at that location;
[0023] FIG. 17 is an enlarged perspective view of a set of guide
rods in the article rotating or twisting portion of the apparatus
that assists in carrying out the one-quarter turn rotation of the
articles as they move along the path of travel, the phantom lines
representing a pair of successive articles that undergo the
rotating action;
[0024] FIG. 18 is a fragmentary perspective view of the twisted,
article rotating belts located in the article rotating or twisting
portion of the apparatus;
[0025] FIG. 19 is an enlarged perspective view of the air cylinder
control assembly at the lower discharge end of the apparatus that
controls the angle of discharge of the cooperating discharge
conveyor assemblies at that location;
[0026] FIG. 20 is a longitudinal cross sectional view through the
control cylinder of FIG. 19;
[0027] FIG. 21 is a schematic diagram illustrating a system for
synchronizing motor speeds of the various parts of the entire
collating, transporting, and inserting mechanism, and for
controlling the angle of discharge of the conveyor assemblies at
the discharge end of the apparatus as a function of the operating
speed of the main newspaper and/or commercial inserting machine;
and
[0028] FIG. 22 is a schematic diagram illustrating the manner in
which articles are rotated one-quarter turn for insertion into the
top loading inserting machine and, if necessary, are turned on edge
from an initial, horizontal position at the source of supply.
DETAILED DESCRIPTION
[0029] The present invention is susceptible of embodiment in many
different forms. While the drawings illustrate and the
specification describes certain preferred embodiments of the
invention, it is to be understood that such disclosure is by way of
example only. There is no intent to limit the principles of the
present invention to the particular disclosed embodiments.
[0030] FIGS. 1 and 2 show transporting or conveying apparatus
broadly denoted by the numeral 10 for supplying articles such as
flimsy single sheets or stacks thereof to a high speed,
multi-station circular newspaper and/or commercial inserting
machine 12. The source of such articles may be an inline collator
denoted by the numeral 14. In one preferred embodiment of the
invention, the collator 14 may take the form of a KANSA
MULTI-FEEDER available from Kansa Technology LLC of Emporia, Kans.
Generally speaking, the collator 14 is most advantageously operable
to collate a number of flat, flexible insert sheets into a stack or
package forming an article to be conveyed into inserting machine
12, although it is within the scope of the present invention for
the source of supply to simply feed individual sheet materials to
the conveying apparatus 10 for subsequent delivery to the newspaper
and/or commercial inserting machine 12. In one preferred
embodiment, the articles supplied by the collator 14 are oriented
horizontally on a flat conveying surface with their planar surfaces
facing upwardly and downwardly respectively. An axis normal to the
plane of such articles thus extends generally vertically
upwardly.
[0031] The present invention has utility in connection with a
variety of different high speed newspaper and/or commercial
inserting machines, both circular and inline. In the illustrated
embodiment, the circular machine 12 may advantageously comprise a
well-known HARRIS/Heidelberg/AM Graphics brand inserting machine
having multiple top loading insert stations about its periphery as
designated generally by the alphabet designations A, B, C, D, E and
F in FIGS. 1 and 2. Stations B-F are provided with dispensing
hoppers 16, 18, 20, 22 and 24 respectively, while the transporting
apparatus 10 takes the place of a dispensing hopper at station A.
As illustrated in FIG. 1, the conveying apparatus 10 and collator
14 approach circular machine 12 in a radial direction.
[0032] Generally speaking, and as well understood by those skilled
in the art, the inserting machine 12 has a number of buckets or
pockets 26 that move sequentially in a circular path of travel
beneath the dispensing hoppers 16-24 and the outlet of conveyor
apparatus 10 for the purpose of receiving insert articles into
opened newspaper or other product sections or jackets within the
pockets 26. Each pocket 26 receives an insert article at each of
the stations A-F during one complete revolution so as to build up a
complete package of jacketed inserts. The complete jacketed package
is discharged from each successive pocket 26 by means not
illustrated. Advertising slicks, weekly news magazines, and
specialty sections are but a few of the wide variety of different
article types that can be inserted at the machine 12 by hoppers
16-24. Advantageously, the station A with conveyor apparatus 10 and
collator 14 may be utilized to insert a stacked compilation of
individual sheet items at one station, thereby greatly increasing
the capacity of the machine 12 without adding additional inserting
stations and hoppers thereto.
[0033] With reference initially to FIGS. 1-3, the conveyor
apparatus 10 generally includes three primary portions, i.e., a
transporting and turning portion 26 leading from collator 14 for
traversing most of the distance between collator 14 and inserter
machine 12 and for turning the articles from a horizontal condition
to an on-end or edgewise orientation; an article rotating portion
28 vertically aligned with insert station A above the later for
receiving the edgewise article from turning portion 26 and rotating
it through a one-quarter turn for proper insertion into the
radially extending pockets 26 of inserting machine 12; and an
article discharging portion 30 at the lower end of rotating portion
28 for receiving the quarter-turned articles from rotating portion
28, establishing firm control over such quarter-turned articles,
and driving them down into the radially oriented pockets 26 passing
rapidly in succession below discharging portion 30.
[0034] This turning, rotating and discharging action is depicted
generally in a simplified manner in FIG. 22 wherein it may be seen
that the overall path of travel 32 of the articles from collator 14
to the inserting machine 12 is upwardly arched to present an
upwardly oriented first leg 34, a gently arched intermediate or
second leg 36 in which the path of travel 32 transitions from
upwardly directed to downwardly directed, and a third downwardly
directed leg 38 leading from second leg 36 and aligned directly
above insert station A. A representative article 40 in FIG. 22
departs from collator 14 in a horizontal condition with an axis 42
that is normal to the plane of article 40. Article 40 then moves
upwardly along the first leg 34 of path of travel 32 through the
transporting and turning portion 26 of conveyor apparatus 10.
Article 40 then moves around the apex of its path of travel through
second leg 36 and turns downwardly as it nears third leg 38
comprising the article rotating portion 28. By the time it enters
third leg 38 of its path of travel, article 40 is on edge with
article axis 42 projecting horizontally as it needs to for
insertion into pocket 26. As article 40 continues along third leg
38, it is rotated or twisted one-quarter turn about the
longitudinal axis 44 of path of travel 32 so that the plane of
article 40 is extending in a radial direction with respect to the
axis of rotation of circular machine 12. As article 40 completes
its descent along the lower region of its path of travel 32, it is
maintained in its radial orientation and is inserted down into the
pocket 26.
[0035] As illustrated particularly in FIGS. 1, 3, 4 and 5, collator
14 has a horizontally disposed discharge conveyor 46 that supports
the horizontally disposed articles as they move leftwardly out of
the machine and generally toward inserter 12. As the articles exit
conveyor 46, they are received by a receiving conveyor assembly 48
that includes a top set of four, relatively narrow conveyor belts
50 looped around rollers 52 on a cross shaft 54 that overlies
conveyor 46 and is driven by collator 14. At their opposite end,
belts 50 are looped around four corresponding rollers 56 mounted on
a transversely extending common shaft 58 that is supported at its
opposite ends by a pair of links 60, 62 that extend longitudinally
of the path of travel and back toward collator 14. The two links
60, 62 are journaled at their upstream ends to a transverse pivot
shaft 64 so that links 60, 62 can swing upwardly and downwardly to
a certain extent about pivot shaft 64. Another pair of laterally
spaced links 66 and 68 are pivoted on pivot shaft 64 slightly
outboard of links 60, 62 and extend therefrom in an upstream
direction to support a transverse shaft 70 carrying four idler
rollers 72 below the top stretch of belts 50. Links 66, 68 may thus
also move up and down about pivot shaft 64 to a certain extent
during operation.
[0036] Receiving conveyor assembly 48 further includes four
relatively narrow conveyor belts 74 (FIG. 5; only one belt 74 being
illustrated) immediately below belts 50 and in vertical alignment
therewith. Belts 74 are wrapped around four rollers 76 on a
transverse shaft 78 that is journaled by opposite sides of the
frame of conveyor apparatus 10. Shaft 78 projects outwardly beyond
such frame on the backside thereof as shown in FIG. 4 for driving
connection with collator 14 by a pulley 80 and a belt 82. Rollers
76 associated with belts 74 are disposed in close proximity to the
discharge end of discharge conveyor 46 so as to effectively form a
continuation of the lower conveying surface provided by discharge
conveyor 46. At their downstream ends, belts 74 are looped around a
set of four corresponding idlers 84 mounted on a shaft 86 directly
below pivot shaft 64. Articles leaving collator 14 on discharge
conveyor 46 thus become clamped between conveyor 46 and belts 74 on
the bottom and belts 50 on the top so as to positively drive and
control the articles. Rear links 66 may pivot upwardly about pivot
shaft 64 as need be to permit idler rollers 72 to be forced
upwardly by the moving article as may be necessary to accommodate
the particular thickness of the article being conveyed.
[0037] A diverter gate broadly denoted by the numeral 88 is
disposed immediately downstream from idler shaft 86 and includes a
series of fingers 90 that are interspersed between belts 50 as
illustrated in FIG. 4 and are normally maintained down at the level
of the other surface of belt 74 as illustrated in FIG. 5. However,
fingers 90 are interconnected by a transverse rod 92 and are
mounted for up and down swinging movement about a transverse pivot
shaft 94 at their downstream ends so that fingers 90 can be flipped
up from their stowed positions of FIG. 5 into the path of travel of
the moving articles for the purpose of blocking further advancement
of the articles and diverting them downwardly out of the path of
travel of the conveying apparatus in the event that such diversion
of the articles is temporarily needed for any reason. An air
cylinder 96 (FIG. 5) is operably coupled with diverter gate 88 for
operating the same between its two extreme positions.
[0038] Receiving conveyor assembly 48 additionally includes a
relatively short bottom set of narrow belts 98 that are looped
around corresponding downstream rollers 100 mounted on a transverse
shaft 102 directly below corresponding upper rollers 56. The
upstream ends of belts 98 are looped around four small rollers 104
on the pivot shaft 94 of diverter gate 98. Shaft 102 of rollers 100
projects outwardly beyond the rear of the frame of the conveyor
apparatus as shown in FIG. 4 and is drivingly coupled with the
drive mechanism of collator 14 by a drive belt 106 and a pulley 108
on the other end of shaft 102. As illustrated in FIG. 6, tension
springs 110 apply downward bias to a crossbar 112 that structurally
interconnects swingable links 60, 62 to urge top rollers 56 down
into engagement with bottom rollers 100.
[0039] The transporting and turning portion 26 of conveyor
apparatus 10 primarily includes two opposed pairs of long,
relatively wide and continuous belts 114 and 116 that are guided by
a multiplicity of transverse rollers. At the upstream end of
conveyor portion 26, an upper transverse roller 118 cooperates with
a lower transverse roller 120 to define an entry nip for articles
from the discharge end of receiving conveyor assembly 48 as
illustrated in FIG. 5. The side-by-side belts 116 are wrapped
around top roller 118 at that location, while belts 114 are looped
around the lower roller 120. Belts 114 and 116 extend upwardly
along a tall upright leg 122 of the conveyor frame defining the
first upright leg 34 of the path of article travel, then along an
arched portion 124 of the frame defining the second leg 36 of the
path of travel 32, and thence partly down a third, downwardly
extending leg 126 of the conveyor frame defining portions of the
third leg 38 of the path of article travel.
[0040] Shortly after entering the downwardly projecting leg 126 of
the conveyor frame, the two sets of belts 114 and 116 are looped
around two pairs of opposed, transverse drive rollers 128 and 130,
the belts 114 being looped around rollers 130 and the belts 116
being looped around rollers 128. Located between the upstream
rollers 118, 120 and the downstream rollers 128, 130 are a
multiplicity of transverse guide rollers 132 that cooperate to
support the belts 114, 116 and to create a pair of opposed,
inter-engaging stretches that serve to effectively clamp and drive
successive articles from rolls 118, 120 on the one hand to the
rolls 128, 130 on the other hand. Although rolls 118, 120 are
opposed to one another at the upstream end of the belt runs and
rolls 128, 130 are similarly opposed at the downstream end of the
stretches, the guide rollers 32 are so disposed that none of the
rollers are directly opposed to one another along the remaining
length of the opposed stretches. This facilitates accommodating
various thicknesses of articles without the need for making any of
the guide rollers 132 moveable toward and away from one another.
Cooperating pairs of edge guide rollers 134 are strategically
positioned along the slack side runs of belts 114 and 116 in
disposition for engaging opposite edges of such belts to maintain
proper positioning of the belts along the length of the guide
rollers 132, the entry rollers 118, 120, and the exit rollers 128,
130.
[0041] Referring also now to FIGS. 7-10, the belts 114, 116 are
driven by a motor 136 supported at the upper end of a frame tower
138 associated with article rotating portion 28 of the conveyor
apparatus. As illustrated in FIG. 9, motor 136 has an output shaft
140 on the backside of conveyor apparatus 10 that carries a pulley
142 drivingly engaged by an endless drive belt 144. Belt 144 is
looped around a driven pulley 145 on a shaft 146 that carries roll
128 so as to supply driving power from motor 136 to rolls 128. Belt
144 is also looped around a number of additional pulleys 148, 150
and 152.
[0042] Pulley 148 is fixed to a shaft 154 that passes completely
through the apparatus and exits on the front side thereof where a
pulley 156 is fixed thereto (FIGS. 8 and 10). Pulley 156 is
entrained by a belt 158 looped around a lower pulley 160 which, in
turn, is fixed to a shaft 162 that carries the belt drive rolls
130. In this manner, motor 136 also supplies driving power to drive
rolls 130. The shaft 154 also serves as a support means for one of
the guide rollers 132 which is rotatable relative to shaft 154.
[0043] The shaft 162 for rolls 130 is carried at the lower ends of
a pair of depending links 164 and 166 that are swingably supported
at their upper ends on the shaft 154. Thus, while rolls 128 are
fixed in their positions, rolls 130 can swing toward and away from
rolls 128 to vary the width of the gap or nip created between rolls
128 and 130. Arcuate clearance slots 168 (FIGS. 7 and 9) in the
opposite side walls of the frame of the conveyor of the apparatus
provide clearance for such movement of shaft 162. In FIG. 7, rolls
128 and 130 are shown somewhat separated, although they would
normally be essentially contacting one another except during those
times when articles are passing therebetween. An air spring
cylinder 170 yieldably biases rolls 130 toward rolls 128 through a
cross bar 172 that interconnects a pair of arms 174 and 176 fixed
to respective links 164 and 166 below the axis of swinging movement
thereof defined by shaft 154. Spring cylinder 170 and other spring
cylinders hereinafter described may take the form of cylinders
available from SMC Pneumatics Incorporated of Indianapolis, Ind.
Such cylinders are advantageously provided with an SMC series 2000
fast release regulator.
[0044] The rolls 128 and 130 represent the termination of the
transporting and turning portion 26 of conveyor apparatus 10 and
the beginning of article rotating portion 28. In this respect, one
primary component of the article rotating portion 28 is a pair of
cooperating twister belts 178 and 180 that not only continue the
advancement of the articles along their path of travel but also
twist and rotate such articles one-quarter turn about an axis
extending axially of the path of travel. The upper end of twister
belt 178 is looped around a pulley 182 (FIG. 10) rotatably mounted
on shaft 146 associated with rolls 128. As illustrated in FIG. 10,
pulley 182 is disposed between the two rolls 128. Similarly, the
upper end of twister belt 180 is looped around a pulley 184
rotatably mounted on driven shaft 162 associated with rolls 130,
the pulley 184 being located between such rolls 130. Belts 178 and
180 are so disposed as to present a pair of downwardly moving,
opposed lengths 178a and 180a that cooperate to engage and grip
opposite faces of the article during its movement through this
portion of conveyor apparatus.
[0045] As illustrated particularly in FIG. 18, each of the belts
178, 180 is twisted one-quarter turn about its longitudinal axis so
that although the upper ends of belts 178, 180 are looped around
fore-and-aft axes defined by shafts 146 and 162, the lower ends of
twister belts 178, 180 are looped around transverse axes defined by
a pair of shafts 186 and 188 respectively. Shafts 146, 162 are thus
perpendicular to shafts 186, 188. The lower end of belt 178 is
looped around a pulley 190 fixed to shaft 186, while the lower end
of belt 180 is looped around a pulley 192 fixed to shaft 188.
Pulleys 190 and 192 are drive pulleys and are provided with
circumferential, centrally disposed ribs 194 that are received
within longitudinal extending, complemental grooves 196 on the
interior surfaces of belts 178 and 180.
[0046] Belts 178 and 180 are relatively narrow compared to the
overall width of articles being conveyed, as will subsequently be
seen. Moreover, it will be noted that runs 178a and 180a of belts
178, 180 engage the articles substantially centrally thereof to
facilitate the rotating and twisting action imparted to the
articles. Belts 178, 180 are confined adjacent their upper ends
against twisting by a pair of opposed belt guide assemblies 198 and
200 as shown in FIG. 16 that engage the return or slack sides of
belts 178, 180. Below guides 198, 200, belts 178 and 180 are free
to twist one-quarter turn and are guided in this respect by edge
guides 202 and 204 illustrated in detail in FIG. 15.
[0047] The article rotating portion 28 of conveyor apparatus 10
further includes as a primary component a set of stationary guides
broadly denoted by the numeral 206 alongside the path of travel of
articles as they are advanced by twister belts 178, 180. FIG. 17
illustrates stationary guides 206 isolated from other structure of
the conveyor apparatus 10 and shows a preferred form of such guides
206, namely a series of elongated, stationary guide rods 208, 210,
212, 214, 216 and 218. Guide rods 208, 210 and 212 are supported at
their upper ends 208a, 210a and 212a respectively by a fore-and-aft
extending beam 220 that also supports the upper twister belt guides
200 for belt 178. Similarly, on the other lateral side of the path
of travel of the articles the guide rods 214, 216 and 218 are
supported at their upper ends 214a, 216a and 218a by a fore-and-aft
extending beam 222 that carries the upper belt guide assembly 198
for belt 180. Guide rods 208-218 form a structure that is analogous
to a twisted cage for confining articles as they are acted upon
twister belts 178 and 180 and for assisting in such rotating action
imparted by belts 178, 180. It will be seen in this respect that
lower ends 208b, 210b and 212b are supported by a lower transverse
mounting bar 224 that extends at right angles to upper support beam
220. Similarly, lower rod ends 214b, 216b and 218b are supported on
a lower mounting bar 226 that extends at right angles to upper
support beam 222 as illustrated in FIG. 17. An article 40 moving
downwardly through stationary guides 206 is encouraged to rotate
one-quarter turn between the upper end of stationary guides 206 and
the lower end thereof. The rods of stationary guides 206 are
configured so as to present a fairly wide but tapering entrance
thereto adjacent the upper end thereof and a narrower outlet
therefrom adjacent the lower end thereof.
[0048] Referring now also to FIGS. 11-16, the article discharging
portion 30 is disposed below article rotating portion 28 and is
adapted to receive articles from the twister belts 178, 180 and the
stationary guide rods 206. The lower exit end of rotating portion
128 and the upper entrance end of discharge portion 30 coincide
with one another at the axes of rotation of lower pulleys 190, 192
for twister belts 178 and 180. The shafts 186 and 188 for pulleys
190 and 192 respectively are carried at the upper ends of four
upwardly converging support links 228, 230, 232 and 234, with the
links 228 and 230 supporting the front shaft 188 and the links 232
and 234 supporting the rear shaft 186. At their lower ends, the
support links 228, 230 are swingably mounted on a cross shaft 236
that spans the tower frame. Similarly, the lower ends of links 232
and 234 are swingably mounted on a cross shaft 238. Drive shafts
186, 188 and pulleys 190, 192 are thus rendered swingable toward
and away from one another.
[0049] Lower ends 208b, 210b and 212b of guide rods 208, 210 and
212 are also rendered moveable toward and away from the lower ends
214b, 216b and 218b of guide rods 214, 216 and 218 by virtue of
swingable links 228, 230 232 and 234. In this regard, it will be
seen that mounting bar 224 for lower guide rod ends 208b, 210b and
212b is carried by a centrally disposed block 240 that is in turn
carried by a longer, horizontally extending beam 242. Beam 242 is
rigidly connected to links 232 and 234 by a corresponding pair of
arms 244 and 246. An air spring cylinder 247 is operably coupled
between the frame tower and beam 242 to yieldably bias twister belt
pulley 190 toward twister belt pulley 192. Similarly, on the front
side of the apparatus, the front mounting bar 226 is carried by a
centrally disposed block 248 that is in turn supported by a
transversely horizontally extending beam 250. Beam 250 is rigidly
joined to the front links 228 and 230 by a pair of spaced arms 252
and 254 respectively. An air spring cylinder 256 is operably
coupled between the tower frame and beam 250 to yieldably bias
lower front twister belt pulley 192 toward lower rear twister belt
190. Manifestly, air cylinders 247 and 256 also serve to bias the
lower ends of guide rods 208-218 toward one another.
[0050] The lower discharging portion 30 of apparatus 10 includes a
pair of generally vertically extending, opposed conveyor assemblies
258 and 260 that are supported by and depend from links 228-234.
Rear conveyor assembly 260 includes four endless, relatively narrow
belts 262, 264, 266 and 268 that are wrapped around four
corresponding rollers 270, 272, 274 and 276 fixed to shaft 186.
Shaft 186 at its opposite ends is rotatably supported by a pair of
upright side frames 278 and 280. At their lower ends, the four
belts 262-268 are wrapped around four corresponding rollers 282,
284, 286 and 288 (FIG. 9), which are in turn fixed to a lower shaft
290 journaled at its opposite ends by the lower ends of side frames
278 and 280.
[0051] Correspondingly, front conveyor assembly 258 includes four
endless, relatively narrow belts 292, 294, 296 and 298 entrained at
their upper ends around a corresponding set of four rollers 300,
302, 304 and 306 that are fixed to shaft 188 for rotation
therewith. Shaft 188 is journaled at its opposite ends by a pair of
upwardly extending side frames 308 and 310. At their lower ends,
side frames 308, 310 journal a shaft 312 carrying four rollers 314,
316, 318 and 320 fixed thereto for the corresponding belts 292,
294, 296 and 298.
[0052] At their lower ends, the rear side frames 278, 280 are fixed
to a transversely extending moveable member 322 (FIG. 14).
Likewise, at their lower ends the side frames 308, 310 are fixed to
a moveable member 324. Members 322 and 324 are operably
interconnected by a double-acting air cylinder 326 (FIG. 14) that
is adapted to maintain only a slight differential in air pressure
on opposite sides of the internal piston thereof so that only a
light compressive action is maintained by air cylinder 326 against
the lower ends of conveyor assemblies 258 and 260. A suitable
cylinder for cylinder 326 is also readily available from SMC
Pneumatics Incorporated of Indianapolis, Ind.
[0053] Located directly above differential air cylinder 326 as
detailed in FIG. 12 is equalizing linkage 328 that maintains the
upper ends conveyor assemblies 258, 260 equally spaced apart
relative to the center of the path of travel of articles
therebetween as the upper ends of conveyor assemblies 258 and 260
move toward and away from one another during passage of articles
therebetween. Linkage 328 includes a rear link 330 pivotally
connected at its upper end to a trunnion 332 on rear beam 242.
Likewise, a front link 334 is pivotally connected at its upper end
by a trunnion 334 to the front beam 250. At their lower ends, links
330 and 334 are swivel-connected to opposite upper and lower ends
of a generally upright rocker lever 338 attached intermediate its
opposite ends to the frame of the tower by a horizontal pivot
340.
[0054] Driving power for the discharge conveyor assemblies 258 and
260, and also for twister belts 178 and 180, is provided via a long
endless belt 342 on the backside of the frame tower. At its upper
end belt 342 is entrained around a pulley 344 disposed beside the
pulley 152 that receives driving power from motor 136. Pulleys 152
and 344 may advantageously comprise side-by-side, fixed
interconnected halves of a double pulley so that when pulley 152 is
rotated by belt 144, so also is pulley 344, which in turn drives
belt 342. At its lower end belt 342 is looped around a pulley 346
fixed to an input shaft 348 of a right angle gearbox 350. Gearbox
350 has an output shaft 352 (FIG. 10) that carries a pulley
354.
[0055] Pulley 354 is entrained by an endless drive belt 356 that
also wraps around three additional pulleys 358, 360 and 362. Pulley
358 is fixed to the outer end of driven shaft 236 for rotating the
same, while pulley 360 is fixed to the outer end of driven shaft
238 for rotating that shaft. Pulley 362 is an idler. Thus, both
shafts 236 and 238 are driven shafts for supplying driving power to
conveyor assemblies 258, 260 and twister belts 178, 180.
[0056] Driven shaft 236 has a pulley 364 fixed thereto slightly
inboard of link 230. Pulley 364 is entrained by an endless upwardly
extending belt 366 that at its upper end is looped around another
pulley 368 fixed to shaft 188. Shaft 188 in turn supplies driving
power to upper rollers 300, 302, 304 and 306 of front conveyor
assembly 258, as well as to lower twister belt pulley 192.
Similarly, a pulley 370 is fixed to shaft 238 just inboard of link
234 and is entrained by a belt 372. Belt 372 at its upper end is
entrained around a pulley 374 (FIG. 11) fixed to shaft 186 for, in
turn, driving upper rollers 270, 272, 274 and 276 of rear conveyor
assembly 260, as well as lower belt twister pulley 190.
[0057] The lower discharge end of the conveyor assemblies 258, 260
is maintained in a vertical orientation as illustrated throughout
the drawings when conveyor apparatus 10 and the circular inserting
machine 12 are either idle or moving fairly slowly. However, it
will be appreciated that as the inserting machine 12 is speeded up
to normal operating speeds, the pockets 26 move underneath and past
discharge conveyor assemblies 258, 260 quite rapidly. Therefore, it
has been found desirable to adjust the angle of discharge of
conveyor assemblies 258, 260 in accordance with the operating speed
of circular inserter 12 so that conveyor assemblies 258, 260 are
angled somewhat forwardly at their lower ends with respect to the
direction of circular travel of pockets 26. Thus, discharge
conveyor assemblies 258, 260 somewhat lead the pockets 26 at full
line speed so as to provide additional time for the discharging
articles to travel the distance between discharge assemblies 258,
260 and pockets 26.
[0058] Such adjustment of the discharge angle is accomplished in
part by a discharge angle adjustment air cylinder broadly denoted
by the numeral 376 illustrated in detail in FIGS. 19 and 20, but
also seen in several of the other figures. Angle adjustment
cylinder 376 comprises a modified double-acting air cylinder that
includes a barrel 378 having an internal chamber 380. Ports 382 and
384 communicate from the outside with chamber 380 at opposite ends
thereof to receive air from supply lines 386 and 388 as shown in
FIG. 19. A piston 390 is adapted to shift within chamber 380 toward
and away from opposite ends thereof, depending upon the air
pressure supplied to ports 382 and 384. Piston 390 has a stem 392
that projects outwardly from one end thereof and is mechanically
coupled with the side frame 280 of rear conveyor assembly 260 by a
connector 394 as seen in FIGS. 11 and 13.
[0059] Secured to the end of barrel 378 opposite stem 392 is a
cylindrical block 396 and a cylindrical end cap 398. An externally
threaded stop rod 400 passes through the end of barrel of 378,
block 396 and end cap 398 and carries a gripping knob 402 at the
outer end thereof. An internally threaded sleeve 404 contained
within end cap 398 threadably engages rod 400 so as to advance or
retract stop rod 400 within chamber 380 when knob 402 is rotated
after loosening a set screw 406. The inboard end of stop rod 400
thus serves as a limit stop for piston 390, determining the amount
of retraction of stem 392 into barrel 378. Because stem 392 is
mechanically connected to the sideframe of rear conveyor assembly
260, when pressurized air is admitted into port 382, rear conveyor
assembly 260 is pulled angularly out of its vertical position until
piston 390 comes into engagement with the inboard end of stop rod
400. Due to the pressure differential air cylinder 326 that always
seeks to maintain the lower discharge ends of discharge conveyors
258, 260 in contacting engagement with one another, front conveyor
258 swings along with rear conveyor 260 into the angled position.
The extent of such angled position is determined by appropriate
adjustment of knob 402, followed by retightening set screw 406 to
retain stop rod 400 in the selected position. On the other hand,
the admittance of pressurized air into the port 384 when piston 390
is against stop rod 400 causes piston 390 to move to the opposite
end of barrel 378, extending stem 392 and returning the discharge
conveyors 258, 260 to their vertical positions as shown throughout
the figures.
[0060] FIG. 21 is a schematic illustration of a system for
controlling and synchronizing the motor speeds of the inserting
machine 12, the conveyor apparatus 10, and the collator 14 with the
discharge angle control cylinder 376. A motor 408 of the circular
inserter 12 is mechanically coupled to an encoder 410 that produces
a pulsed output signal related to the speed of motor 408. That
signal is delivered to a drive controller 412 associated with the
conveyor apparatus drive motor 136 to control the speed of conveyor
apparatus 10. An output from drive controller 412 is delivered to a
control unit 414 which processes the signal and sends an output to
a solenoid valve 416 that controls which of the ports 382, 384 of
control cylinder 376 will receive pressurized air, and which will
be communicated with atmosphere. Both of the lines 386, 388 leading
to cylinder 376 are provided with adjustable needle valves 418 and
420 respectively for feathering the entry and exit of pressurized
air to and from cylinder 376.
[0061] When the inserter motor 408 reaches a predetermined speed as
sensed by encoder 410, drive controller 412 and control unit 414,
solenoid 416 is actuated to admit pressurized air into cylinder 376
through line 388 so as to retract stem 392 to the extent permitted
by the adjusted stop rod 400, correspondingly changing the delivery
or discharge angle of the discharge conveyors 258, 260. On the
other hand, when the operating speed drops below the set level,
solenoid 416 is deactuated to admit pressurized air into cylinder
376 via line 386 and exhaust air via line 388, extending stem 392
and returning discharge conveyor assemblies 258, 260 to their
normal vertical orientations. Control unit 414 also sends control
signals to drive controllers associated with collator 14 such as,
for example, the four drive controllers 422, 424, 426, and 428.
Such controllers regulate the speeds of their corresponding motors
430, 432, 434 and 436, it being noted that the number of such
motors and drive controllers can vary widely depending upon the
nature of collator 14 and the number of loading stations associated
therewith.
[0062] One type of encoder suitable for performing the function of
the encoder 410 is available from Heidenhain Corporation of
Schamburg, Ill. as Model ROD4861024. The control unit 414 and the
various drive controllers 412, 422, 424, 426 and 428 may also be
obtained from Heidenhain Corporation as a DKCO2.3 drive controller
featuring a SERCOS interface and a CCD control unit with a SERCOS
interface. The barrel 378 and related parts of control cylinder 376
may comprise a standard double-acting single rod series CG1
cylinder available from SMC Corporation of Indianapolis, Ind., and
fast release regulators associated with each of the air spring
cylinders of the conveyor apparatus 10 may comprise SMC series 2000
regulators.
[0063] Operation
[0064] The operation and use of conveyor apparatus 10 should be
apparent from the foregoing description. Therefore, suffice it to
say at this juncture that, as illustrated in FIG. 22, as the
articles 40 travel in succession from collating machine 14 along
the path of travel 32, they are upended into a vertical or upright
orientation along the article turning portion 26 of conveyor
apparatus 10 and are twisted or rotated about an axis 44 extending
longitudinally of the path of travel 32 along the article rotating
portion 28 of apparatus 10. This orients the articles 40 radially
to match the radial orientation of the pockets 26 so that articles
40 can be forcibly, rapidly and reliably stuffed down into pockets
26 as the latter move successively past and below the discharge
portion 30 of conveyor apparatus 10.
[0065] Due to the cooperating efforts of the conveyor belts 114 and
116 of article turning portion 26, the articles are maintained
under complete control at all times, notwithstanding the fact that
they may comprise loose, flimsy sheets stacked one upon the other.
As such articles leave conveyor belts 114 and 116 and enter the
twister portion 28 of apparatus 10, the twister belts 178 and 180
assume firm, secure control over the articles and turn them
one-quarter turn into their proper radial orientations. Guide rods
208-218 cooperate during this quarter-turn twisting action to
maintain control over the articles and to assist in carrying out
the quarter-turning motion. When the articles are then received by
the cooperating discharge conveyor assemblies 258 and 260 of
discharge portion 30, the articles are maintained in their radial
dispositions for a short distance of travel so as to assure that
complete control continues to be exerted as they are stuffed down
into the pockets 26.
[0066] The inventor(s) hereby state(s) his/their intent to rely on
the Doctrine of Equivalents to determine and assess the reasonably
fair scope of his/their invention as pertains to any apparatus not
materially departing from but outside the literal scope of the
invention as set out in the following claims.
* * * * *