CA2170808A1 - Apparatus for preventing deformation of stacks of flat objects during speed changes - Google Patents
Apparatus for preventing deformation of stacks of flat objects during speed changesInfo
- Publication number
- CA2170808A1 CA2170808A1 CA 2170808 CA2170808A CA2170808A1 CA 2170808 A1 CA2170808 A1 CA 2170808A1 CA 2170808 CA2170808 CA 2170808 CA 2170808 A CA2170808 A CA 2170808A CA 2170808 A1 CA2170808 A1 CA 2170808A1
- Authority
- CA
- Canada
- Prior art keywords
- stacks
- conveyor
- pusher
- belt
- stack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000001133 acceleration Effects 0.000 claims abstract description 20
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000010168 coupling process Methods 0.000 claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/26—Auxiliary devices for retaining articles in the pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/38—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements for effecting intermittent movement of belts or chains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/82—Rotary or reciprocating members for direct action on articles or materials, e.g. pushers, rakes, shovels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3054—Arrangements for removing completed piles by moving the surface supporting the lowermost article of the pile, e.g. by using belts or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3081—Arrangements for removing completed piles by acting on edge of the pile for moving it along a surface, e.g. by pushing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Discharge By Other Means (AREA)
- Intermediate Stations On Conveyors (AREA)
Abstract
Successive groups of stacks of paper sheets are delivered onto the upper reach of an impermeable conveyor belt which is thereupon caused to advance the groups sideways onto another conveyor. In order to prevent deformation of stacks during starting of the conveyor belt, the latter is temporarily coupled with a pusher which is adjacent the rear side of the adjacent last stack of the group to be advanced onto the other conveyor. The coupling can be designed to establish a pneumatic connection between the impermeable belt and the pusher, and such connection can be terminated as soon as the acceleration of the group of stacks to a selected speed is completed. The pusher is thereupon retracted to a starting position.
Description
The invention relates to improvements in app~ratus for transporting stacks of overlapping superimposed staeks of flat objects, such as paper sheets. More particularly, the invention relates to improvements in apparatus~for inter-mittent transport of stacks, for example, in machines or production lines wherein stacks are delivered to a wrapping or packing station for confinement in wrappers, boxes or like receptacles. Still more particularly, the invention relates to improvements in stack transporting apparatus which are designed to prevent deformation of stacks during speed ehanges, such as during acceleration from zero speed to a variable or eonstant speed for advancement from a preeeding station to a next-following station.
It is eustomary to transport groups of staeks of flat objeets (such as paper sheets and hereinafter referred to as sheets or paper sheets) in a machine or produetion line wherein groups of plural aligned stacks are advanced in a first direction to a conveyor which serves to transport the stacks of successive groups in the form of a file or row including a leading stack and a last stack behind the leading stack. For example, the conveyor can advance the files or rows of grouped-together stacks to a singularizing conveyor which, in turn, delivers discrete stacks at desired intervals to a packing or other processing station. Refer-c 2170808 ence may be had, for example, to commonly owned US patentNo. 4,518,075 granted May 21, 1985 to Aykut et a~. for "Apparatus for gathering and singularizing stacks of paper sheets or the like". The stacks can be obtained by severing large stacks of overlapping sheets longitudinally and transverselyl and the thus obtained stacks of requisite size are thereupon transported in groups and/or otherwise toward and into a packing station or to another destination. The means for transporting stacks in such apparatus can include endless belts or bands, endless chains, tongs and/or other mobile stack supporting and/or pulling systems. The disclosure of the patent to Aykut et al. is incorporated herein by reference.
A drawback of heretofore known apparatus of the above outlined character is that they are likely to cause, or cannot prevent, deformation of stacks (e.g., standard reams of paper sheets) during certain stages of transport.
For example, at least some sheets at the top of a stack are likely to lag behind the sheets in the lower portion of such stack in response to an abrupt acceleration of such stack from zero speed or from a lower speed to a higher speed.
Such acceleration is necessary in order to enable a trailing stack to catch up with a stack before it when a row or file of spaced apart stacks is to be converted into a file or row of immediately adjacent (e.g., abutting) stacks. Analo-2~70808 gously, certain sheets of a stack in front of a second stackare likely to lag behind the sheets below them in re~ponse to acceleration of the front stack relative to the trailing stack or stacks, e.g., to singularize a file of closely adjacent stacks into a file wherein successive stacks are disposed at a selected distance from each other. Any defor-mation or distortion of stacks is highly undesirable, e.g., when the stacks are to be fed into a packing station for confinement in wrappers, boxes or the like.
217081~8 The invention is embodied in an apparatus for transporting stacks of a series of stacks of overlapping flat objects (such as paper sheets) in a predetermined direction, e.g., to a singularizing station. The improved apparatus comprises a stack advancing conveyor, means for repeatedly starting and driving the conveyor to advance the stacks thereon in the predetermined direction with attendant acceleration of stacks in response to each starting of the conveyor, and means for preventing deformation of stacks (particularly due to inertia) during acceleration. The de-formation preventing means comprises at least one pusher for stacks on the conveyor and means for moving the at least one pusher in at least substantial synchronism with the conveyor, at least during the acceleration of stacks.
The apparatus further comprises or cooperates with means for supplying to the advancing conveyor requisite numbers of stacks, preferably in a second direction transversely of the predetermined direction. The means for supplying can include at least one second conveyor having means for delivering to the advancing conveyor groups of two or more stacks with the stacks of each group at least substantially aligned in the predetermined direction. The arrangement is preferably such that each group includes a last stack, as seen in the predetermined direction, and the 217080~
at least one pusher is located behind the last stack of the group of stacks on the advancing conveyor.
The means for moving the at least one pusher can include means for temporarily coupling the at least one pusher to the advancing conveyor. The coupling means can include means for compelling the at least one pusher to share the movements of the stacks on the advancing conveyor in the predetermined direction, at least during accelerati-o;n of the stacks. The compelling means of the coupling means can include means for establishing a temporary form locking connection between the advancing conveyor and the at least one pusher. The means for establishing a temporary form locking connection can include means for (e.g., magnetically and/or otherwise) temporarily attracting the at least one pusher to the advancing conveyor. In a presently preferred embodiment, the means for temporarily attracting comprises at least one suction generating device. To this end, the advancing conveyor can include an impermeable mobile support for stacks and the at least one suction generating device can comprise at least one suction port provided in an underside of the at least one pusher (such underside is adjacent the impermeable mobile support of the advancing conveyor).
The apparatus can further comprise means for return-ing the at least one pusher to a starting or retracted posi-~ 217~808 tion by moving the at least one pusher counter to thepredetermined direction upon completion of each st~rting of the advancing conveyor. The returning means can include a fluid-operated motor, e.g., a double-acting pneumatic cy-linder and piston assembly.
In a presently preferred embodiment of the improvedapparatus, the advancing conveyor for discrete stacks or groups of two or more stacks includes an endless flexible belt having a stack-supporting upper reach, and the means for moving the at least one pusher includes means for temporarily attracting (e.g., magnetically and/or pneumatically) the at least one pusher to the upper reach of the endless belt. The belt can be impermeable to fluids, especially if the means for temporarily attracting the at least one pusher to the upper reach of the belt includes a suction generating device.
The novel features which are considered as characteristic of the invention are set forth in particular in the appended claims. The improved apparatus itself, however, both as to its construction and its mode of operation, together with additional features and advantages thereof, will be best understood upon perusal of the following detailed description of certain presently preferred specific embodiments with reference to the accompanying drawings.
FIG. 1 is a schematic elevational view of an apparatus which embodies one form of the invention and is designed to advance groups of stacks of paper sheets or other flat objects onto a singularizing conveyor or to another destination;
FIG. 2 is a plan view of the apparatus, with the pusher shown in a retracted or starting position prior to starting of the stack advancing conveyor; and FIG. 3 is a plan view similar to that of FIG. 2 but showing the pusher in an extended position upon at least partial acceleration of the group of stacks on the advancing conveyor.
The apparatus which is shown in FIG. 1 serves to transport stacks 2 of overlapping sheets in the direction of arrow 3. More specifically, the apparatus serves to intermittently transport groups 1 of three neighboring stacks 2 each from the starting positions shown in FIG.
2 toward and beyond the advanced positions which are shown in FIG. 3. The number of sheets in each of the stacks 2 may but need not be the same and such stacks may but need not have identical heights.
The conveyor which serves to advance successive groups 1 of three stacks 2 each in the direction of the arrow 3 comprises an endless impermeable belt 7 which is trained over suitable pulleys or sheaves and the upper reach or stretch of which serves as a support for the groups 1.
The means 4 for repeatedly starting and driving the conveyor belt 7 to advance the groups 1 of stacks 2 on the upper reach of the belt 7 in the directon of the arrow 3 comprises a suitable prime mover 6, such as an electric motor. The manner in which an electric motor can be repeatedly started - to accelerate and drive a conveyor belt in a desired manner is well known and, therefore, the exact mode of controlling the prime mover 6 forms no part of the present invention.
It suffices to say that, in the absence of any undertakings to the contrary, each and every starting of the belt 7 to 217~80~
accelerate the group 1 of stacks 2 on the upper reach of the belt 7 from zero speed to a desired speed is lik~ly to cause at least some sheets at the top of at least one of the stacks 2, for example, the last or leftmost stack, to lag behind the sheets immediately below the lagging sheets due to inertia and/or the resistance of the surrounding air.
This would result in at least slight deformation or distortion of one or more stacks 2 so that it would be more difficult, or plain impossible, to adequately treat the deformed stacks at the next-following station or stations.
The apparatus of FIG. 1 further comprises or cooperates with one or more second conveyors (not shown) which serves or serve to deliver successive groups 1 of stacks 2 onto the upper reach of the belt 7 while the latter is idle. The stacks 2 of a group 1 can be delivered to the belt 7 simultaneously or one after the other. The second conveyor or conveyors are preferably designed to deliver stacks 2 in a direction transversely of that which is indicated by the arrow 3. Reference may be had to the aforementioned commonly owned US patent to Aykut et al.
which discloses conveyors capable of delivering stacks to a conve.yor analogous to..the belt~7 in the apparatus~.of FIG.
1. The reference character 8 denotes in FIG. 1 a third con-veyor which receives successive rows or files of three stacks 2 each from the upper reach of the belt 7, e.g., for 2~7080~
singularization and/or for delivery to a packing station, not shown.
In accordance with a feature of the invention, the apparatus further comprises means for preventing deformation (or at least for greatly reducing the likelihood of deformation) of stacks 2 during acceleration from zero speed to a selected speed for advancement with the upper reach of the belt 7 in the direction of the arrow 3. In the il-lustrated apparatus, the deformation preventing means comprises a pusher 9 for stacks 2 on the upper reach of the belt 7 and means for moving the pusher 9 in at least substantial synchronism with the conveyor 7, at least during acceleration of the group 1 of stacks on the upper reach of the belt 7.
The illustrated means for moving the pusher 9 in synchronism with the upper reach of the belt 7 during acceleration of this belt by the prime mover 6 includes means for temporarily coupling the pusher to the beIt, and such coupling means includes means for compelling the pusher to share the movements of the stacks 2 on the belt 7 in the direction of the arrow 3 at least during acceleration of the group 1 of stacks to a desired constant or variable speed for preferably rapid advancement of the group 1 toward and onto the third conveyor 8. The pusher 9 has an underside which is adjacent the upper side of the upper 217~80S
reach of the impermeable belt 7, and this pusher extends upwardly beyond the upper sides of the stacks 2 so~that, while advancing in synchronism with the belt 7, it can effectively prevent the uppermost sheets of the last or leftmost stack 2 from changing their positions relative to the lower sheets of such last stack. At the same time, the last stack prevents the sheets of the other two stacks 2 in a group 1 from shifting their positions relative to other sheets in the same stack or stacks.
The aforementioned coupling means is designed to establish a temporary form locking connection between the conveyor belt 7 and the pusher 9, and the illustrated form locking connection is designed to temporarily attract the underside of the pusher 9 to the upper side of the upper reach of the impermeable belt 7. This can be achieved by resorting to a suitable system of magnets. However, it is presently preferred to employ one or more suction generating devices including a series of suction ports 11 which are pro-vided in the underside of the pusher 9 aand are connected or connectable to a suitable pump 12 or another suction generating device.
Still further, the apparatus of FIG. 1 comprises means for returning the pusher 9 from the extended or advanced position of FIG. 3 back to the initial or starting or retracted position of FIGS. 1 and 2. The means for re-217080~
turning or retracting the pusher 9 to the starting position includes a fluid-operated motor here shown as a double-acting pneumatic cylinder and piston assembly having a piston rod 13 attached to the pusher 9 and connected to a piston (not shown) which is reciprocable in a cylinder 14.
The reference character 16 denotes a suitable fluid flow regulating valve which is connected with the two cylinder chambers at opposite sides of the piston in the cylinder 14 by conduits 18 and 19 and which is further connected to a standard source (not shown) of compressed air or another suitable gaseous fluid.
The illustrated pusher 9 is an elongated plate-like member which extends all the way across the trailing side of the last or leftmost stack 2 on the upper reach of the lS belt 7. However, it is equally within the purview of the invention to replace the illustrated relatively wide pusher with a narrower pusher or with a set of two or more interconnected pushers each of which has at least one suction port 11 so that its underside can be temporarily attracted to the upper side of the upper reach of the belt 7, namely, at least during starting of the belt 7 by the prime mover 6.
The arrow 17 denotes in FIG. 2 the direction of delivery of a group or set 1 of three stack 2 onto the upper reach of the belt 7. At such time, the pusher 9 is maintained in the starting or retracted position of FIGS.
1 and 2, i.e., the pusher is immediately adjace~nt or actually abuts the left-hand side of the last or leftmost stack 2 (as seen in the direction of the arrow 3). In the next step, the suction generating device 12 is operated to draw air from the ports 11 so that the underside of the pusher 9 is attracted to and hence temporarily coupled with the impermeable belt 7. The next following step includes starting of the prime mover 6 so that the belt 7 is started and proceeds to accelerate the group 1 of three stacks 2 thereon in the direction of the arrow 3. At such time, the conduit 18 and the valve 16 connect the right-hand chamber in the cylinder 14 with the atmosphere so that the piston rod 13 can be entrained by the pusher 9 which is then temporarily coupled (attracted~ to the moving belt 7. Such mode of operating the improved apparatus ensures that the mutual positions of stacks 2 forming the group l on the belt 7 need not be changed in any way during advancement of the stacks toward and onto the third conveyor 8.
The acceleration of the group 1 of stacks 2 on the upper reach of the belt 7 is completed when such stacks reach the positions which are shown in FIG. 3. The pusher 9 need not share any further movements of the stacks 2 in the direction of the arrow 3 (toward and onto the conveyor 8), i.e., the force locking connection between the underside of the pusher and the upper side of the upper reach of the belt 7 can be interrupted. The valve 16 is then cau~ed to permit evacuation of flud from the left-hand chamber of the cylinder 14 via conduit 19 and the conduit 18 is connected 5to the source of compressed fluid so that the piston rod 13 is retracted into the cylinder 14 and the piston rod returns the pusher 9 to the starting position of FIGS. 1 and 2. Once the advancement of the group 1 of stacks 2 from the belt 7 onto the conveyor 8 is completed, the upper reach 10of the belt 7 is ready to receive a fresh group 1 of stacks 2 which are delivered in the direction of the arrow 17.
The improved apparatus is susceptible of numerous additional modifications without departing from the spirit of the inve~tion. For example, the means for moving the 15pusher 9 in synchronism with the belt 7 or another suitable stack advancing conveyor can comprise a discrete prime mover whose operation is synchronized with that of the prime mover 6 during starting of the advancing conveyor. A somewhat similar apparatus is proposed in German Auslegeschrift No.
2024 37 665 which discloses an apparatus for gathering piles of flattened hoses or bags and for transporting freshly assembled piles off the gathering conveyor. The provision of the aforediscussed novel means for coupling the belt 7 with the pusher 9 during acceleration of one or more stacks 252 on the upper reach of the impermeable belt 7 has been ` ~ 21 7D808 found to be superior to the prior proposal for a number of important reasons. Thus, it is possible to establish ~a very simple but highly reliable temporary form lock between the pusher 9 and the belt 7 or another suitable stack advancing conveyor, the pusher 9 and the moving and retracting means therefor occupy a small amount of space, and the pusher can invariably advance at the speed of the belt 7 in an optimum position relative to the adjacent stack or stacks 2.
As already mentioned above, the means for temporarily coupling the pusher 9 or an equivalent pusher to the belt 7 can include a magnetic system, e.g., a magnetizable pusher and a magnetic film or coat on the belt 7. Such magnetic system can be employed in addition to or in lieu of the illustrated coupling means including the ports 11 and the suction generating device 12 with the control means therefor.
Another important advantage of the improved apparatus is that the novel means for preventing deformation of stacks during transport by the advancing conveyor can be installed in many existing stack transporting apparatus, e.g., in apparatus of the type disclosed in the aforediscussed commonly owned US patent to Aykut et al.
Though the illustrated apparatus is designed to ensure that the pusher 9 is coupled to the belt 7 only during acceleration of stacks 2 from zero speed to a select-ed speed, it is clear that the means for returning or retracting the pusher to its starting position c~an be actuated subsequent to advancement of the pusher beyond the extended position of FIG. 3. This would even further reduce the likelihood of deformation of stacks 2 on their way toward and onto the conveyor 8.
It is eustomary to transport groups of staeks of flat objeets (such as paper sheets and hereinafter referred to as sheets or paper sheets) in a machine or produetion line wherein groups of plural aligned stacks are advanced in a first direction to a conveyor which serves to transport the stacks of successive groups in the form of a file or row including a leading stack and a last stack behind the leading stack. For example, the conveyor can advance the files or rows of grouped-together stacks to a singularizing conveyor which, in turn, delivers discrete stacks at desired intervals to a packing or other processing station. Refer-c 2170808 ence may be had, for example, to commonly owned US patentNo. 4,518,075 granted May 21, 1985 to Aykut et a~. for "Apparatus for gathering and singularizing stacks of paper sheets or the like". The stacks can be obtained by severing large stacks of overlapping sheets longitudinally and transverselyl and the thus obtained stacks of requisite size are thereupon transported in groups and/or otherwise toward and into a packing station or to another destination. The means for transporting stacks in such apparatus can include endless belts or bands, endless chains, tongs and/or other mobile stack supporting and/or pulling systems. The disclosure of the patent to Aykut et al. is incorporated herein by reference.
A drawback of heretofore known apparatus of the above outlined character is that they are likely to cause, or cannot prevent, deformation of stacks (e.g., standard reams of paper sheets) during certain stages of transport.
For example, at least some sheets at the top of a stack are likely to lag behind the sheets in the lower portion of such stack in response to an abrupt acceleration of such stack from zero speed or from a lower speed to a higher speed.
Such acceleration is necessary in order to enable a trailing stack to catch up with a stack before it when a row or file of spaced apart stacks is to be converted into a file or row of immediately adjacent (e.g., abutting) stacks. Analo-2~70808 gously, certain sheets of a stack in front of a second stackare likely to lag behind the sheets below them in re~ponse to acceleration of the front stack relative to the trailing stack or stacks, e.g., to singularize a file of closely adjacent stacks into a file wherein successive stacks are disposed at a selected distance from each other. Any defor-mation or distortion of stacks is highly undesirable, e.g., when the stacks are to be fed into a packing station for confinement in wrappers, boxes or the like.
217081~8 The invention is embodied in an apparatus for transporting stacks of a series of stacks of overlapping flat objects (such as paper sheets) in a predetermined direction, e.g., to a singularizing station. The improved apparatus comprises a stack advancing conveyor, means for repeatedly starting and driving the conveyor to advance the stacks thereon in the predetermined direction with attendant acceleration of stacks in response to each starting of the conveyor, and means for preventing deformation of stacks (particularly due to inertia) during acceleration. The de-formation preventing means comprises at least one pusher for stacks on the conveyor and means for moving the at least one pusher in at least substantial synchronism with the conveyor, at least during the acceleration of stacks.
The apparatus further comprises or cooperates with means for supplying to the advancing conveyor requisite numbers of stacks, preferably in a second direction transversely of the predetermined direction. The means for supplying can include at least one second conveyor having means for delivering to the advancing conveyor groups of two or more stacks with the stacks of each group at least substantially aligned in the predetermined direction. The arrangement is preferably such that each group includes a last stack, as seen in the predetermined direction, and the 217080~
at least one pusher is located behind the last stack of the group of stacks on the advancing conveyor.
The means for moving the at least one pusher can include means for temporarily coupling the at least one pusher to the advancing conveyor. The coupling means can include means for compelling the at least one pusher to share the movements of the stacks on the advancing conveyor in the predetermined direction, at least during accelerati-o;n of the stacks. The compelling means of the coupling means can include means for establishing a temporary form locking connection between the advancing conveyor and the at least one pusher. The means for establishing a temporary form locking connection can include means for (e.g., magnetically and/or otherwise) temporarily attracting the at least one pusher to the advancing conveyor. In a presently preferred embodiment, the means for temporarily attracting comprises at least one suction generating device. To this end, the advancing conveyor can include an impermeable mobile support for stacks and the at least one suction generating device can comprise at least one suction port provided in an underside of the at least one pusher (such underside is adjacent the impermeable mobile support of the advancing conveyor).
The apparatus can further comprise means for return-ing the at least one pusher to a starting or retracted posi-~ 217~808 tion by moving the at least one pusher counter to thepredetermined direction upon completion of each st~rting of the advancing conveyor. The returning means can include a fluid-operated motor, e.g., a double-acting pneumatic cy-linder and piston assembly.
In a presently preferred embodiment of the improvedapparatus, the advancing conveyor for discrete stacks or groups of two or more stacks includes an endless flexible belt having a stack-supporting upper reach, and the means for moving the at least one pusher includes means for temporarily attracting (e.g., magnetically and/or pneumatically) the at least one pusher to the upper reach of the endless belt. The belt can be impermeable to fluids, especially if the means for temporarily attracting the at least one pusher to the upper reach of the belt includes a suction generating device.
The novel features which are considered as characteristic of the invention are set forth in particular in the appended claims. The improved apparatus itself, however, both as to its construction and its mode of operation, together with additional features and advantages thereof, will be best understood upon perusal of the following detailed description of certain presently preferred specific embodiments with reference to the accompanying drawings.
FIG. 1 is a schematic elevational view of an apparatus which embodies one form of the invention and is designed to advance groups of stacks of paper sheets or other flat objects onto a singularizing conveyor or to another destination;
FIG. 2 is a plan view of the apparatus, with the pusher shown in a retracted or starting position prior to starting of the stack advancing conveyor; and FIG. 3 is a plan view similar to that of FIG. 2 but showing the pusher in an extended position upon at least partial acceleration of the group of stacks on the advancing conveyor.
The apparatus which is shown in FIG. 1 serves to transport stacks 2 of overlapping sheets in the direction of arrow 3. More specifically, the apparatus serves to intermittently transport groups 1 of three neighboring stacks 2 each from the starting positions shown in FIG.
2 toward and beyond the advanced positions which are shown in FIG. 3. The number of sheets in each of the stacks 2 may but need not be the same and such stacks may but need not have identical heights.
The conveyor which serves to advance successive groups 1 of three stacks 2 each in the direction of the arrow 3 comprises an endless impermeable belt 7 which is trained over suitable pulleys or sheaves and the upper reach or stretch of which serves as a support for the groups 1.
The means 4 for repeatedly starting and driving the conveyor belt 7 to advance the groups 1 of stacks 2 on the upper reach of the belt 7 in the directon of the arrow 3 comprises a suitable prime mover 6, such as an electric motor. The manner in which an electric motor can be repeatedly started - to accelerate and drive a conveyor belt in a desired manner is well known and, therefore, the exact mode of controlling the prime mover 6 forms no part of the present invention.
It suffices to say that, in the absence of any undertakings to the contrary, each and every starting of the belt 7 to 217~80~
accelerate the group 1 of stacks 2 on the upper reach of the belt 7 from zero speed to a desired speed is lik~ly to cause at least some sheets at the top of at least one of the stacks 2, for example, the last or leftmost stack, to lag behind the sheets immediately below the lagging sheets due to inertia and/or the resistance of the surrounding air.
This would result in at least slight deformation or distortion of one or more stacks 2 so that it would be more difficult, or plain impossible, to adequately treat the deformed stacks at the next-following station or stations.
The apparatus of FIG. 1 further comprises or cooperates with one or more second conveyors (not shown) which serves or serve to deliver successive groups 1 of stacks 2 onto the upper reach of the belt 7 while the latter is idle. The stacks 2 of a group 1 can be delivered to the belt 7 simultaneously or one after the other. The second conveyor or conveyors are preferably designed to deliver stacks 2 in a direction transversely of that which is indicated by the arrow 3. Reference may be had to the aforementioned commonly owned US patent to Aykut et al.
which discloses conveyors capable of delivering stacks to a conve.yor analogous to..the belt~7 in the apparatus~.of FIG.
1. The reference character 8 denotes in FIG. 1 a third con-veyor which receives successive rows or files of three stacks 2 each from the upper reach of the belt 7, e.g., for 2~7080~
singularization and/or for delivery to a packing station, not shown.
In accordance with a feature of the invention, the apparatus further comprises means for preventing deformation (or at least for greatly reducing the likelihood of deformation) of stacks 2 during acceleration from zero speed to a selected speed for advancement with the upper reach of the belt 7 in the direction of the arrow 3. In the il-lustrated apparatus, the deformation preventing means comprises a pusher 9 for stacks 2 on the upper reach of the belt 7 and means for moving the pusher 9 in at least substantial synchronism with the conveyor 7, at least during acceleration of the group 1 of stacks on the upper reach of the belt 7.
The illustrated means for moving the pusher 9 in synchronism with the upper reach of the belt 7 during acceleration of this belt by the prime mover 6 includes means for temporarily coupling the pusher to the beIt, and such coupling means includes means for compelling the pusher to share the movements of the stacks 2 on the belt 7 in the direction of the arrow 3 at least during acceleration of the group 1 of stacks to a desired constant or variable speed for preferably rapid advancement of the group 1 toward and onto the third conveyor 8. The pusher 9 has an underside which is adjacent the upper side of the upper 217~80S
reach of the impermeable belt 7, and this pusher extends upwardly beyond the upper sides of the stacks 2 so~that, while advancing in synchronism with the belt 7, it can effectively prevent the uppermost sheets of the last or leftmost stack 2 from changing their positions relative to the lower sheets of such last stack. At the same time, the last stack prevents the sheets of the other two stacks 2 in a group 1 from shifting their positions relative to other sheets in the same stack or stacks.
The aforementioned coupling means is designed to establish a temporary form locking connection between the conveyor belt 7 and the pusher 9, and the illustrated form locking connection is designed to temporarily attract the underside of the pusher 9 to the upper side of the upper reach of the impermeable belt 7. This can be achieved by resorting to a suitable system of magnets. However, it is presently preferred to employ one or more suction generating devices including a series of suction ports 11 which are pro-vided in the underside of the pusher 9 aand are connected or connectable to a suitable pump 12 or another suction generating device.
Still further, the apparatus of FIG. 1 comprises means for returning the pusher 9 from the extended or advanced position of FIG. 3 back to the initial or starting or retracted position of FIGS. 1 and 2. The means for re-217080~
turning or retracting the pusher 9 to the starting position includes a fluid-operated motor here shown as a double-acting pneumatic cylinder and piston assembly having a piston rod 13 attached to the pusher 9 and connected to a piston (not shown) which is reciprocable in a cylinder 14.
The reference character 16 denotes a suitable fluid flow regulating valve which is connected with the two cylinder chambers at opposite sides of the piston in the cylinder 14 by conduits 18 and 19 and which is further connected to a standard source (not shown) of compressed air or another suitable gaseous fluid.
The illustrated pusher 9 is an elongated plate-like member which extends all the way across the trailing side of the last or leftmost stack 2 on the upper reach of the lS belt 7. However, it is equally within the purview of the invention to replace the illustrated relatively wide pusher with a narrower pusher or with a set of two or more interconnected pushers each of which has at least one suction port 11 so that its underside can be temporarily attracted to the upper side of the upper reach of the belt 7, namely, at least during starting of the belt 7 by the prime mover 6.
The arrow 17 denotes in FIG. 2 the direction of delivery of a group or set 1 of three stack 2 onto the upper reach of the belt 7. At such time, the pusher 9 is maintained in the starting or retracted position of FIGS.
1 and 2, i.e., the pusher is immediately adjace~nt or actually abuts the left-hand side of the last or leftmost stack 2 (as seen in the direction of the arrow 3). In the next step, the suction generating device 12 is operated to draw air from the ports 11 so that the underside of the pusher 9 is attracted to and hence temporarily coupled with the impermeable belt 7. The next following step includes starting of the prime mover 6 so that the belt 7 is started and proceeds to accelerate the group 1 of three stacks 2 thereon in the direction of the arrow 3. At such time, the conduit 18 and the valve 16 connect the right-hand chamber in the cylinder 14 with the atmosphere so that the piston rod 13 can be entrained by the pusher 9 which is then temporarily coupled (attracted~ to the moving belt 7. Such mode of operating the improved apparatus ensures that the mutual positions of stacks 2 forming the group l on the belt 7 need not be changed in any way during advancement of the stacks toward and onto the third conveyor 8.
The acceleration of the group 1 of stacks 2 on the upper reach of the belt 7 is completed when such stacks reach the positions which are shown in FIG. 3. The pusher 9 need not share any further movements of the stacks 2 in the direction of the arrow 3 (toward and onto the conveyor 8), i.e., the force locking connection between the underside of the pusher and the upper side of the upper reach of the belt 7 can be interrupted. The valve 16 is then cau~ed to permit evacuation of flud from the left-hand chamber of the cylinder 14 via conduit 19 and the conduit 18 is connected 5to the source of compressed fluid so that the piston rod 13 is retracted into the cylinder 14 and the piston rod returns the pusher 9 to the starting position of FIGS. 1 and 2. Once the advancement of the group 1 of stacks 2 from the belt 7 onto the conveyor 8 is completed, the upper reach 10of the belt 7 is ready to receive a fresh group 1 of stacks 2 which are delivered in the direction of the arrow 17.
The improved apparatus is susceptible of numerous additional modifications without departing from the spirit of the inve~tion. For example, the means for moving the 15pusher 9 in synchronism with the belt 7 or another suitable stack advancing conveyor can comprise a discrete prime mover whose operation is synchronized with that of the prime mover 6 during starting of the advancing conveyor. A somewhat similar apparatus is proposed in German Auslegeschrift No.
2024 37 665 which discloses an apparatus for gathering piles of flattened hoses or bags and for transporting freshly assembled piles off the gathering conveyor. The provision of the aforediscussed novel means for coupling the belt 7 with the pusher 9 during acceleration of one or more stacks 252 on the upper reach of the impermeable belt 7 has been ` ~ 21 7D808 found to be superior to the prior proposal for a number of important reasons. Thus, it is possible to establish ~a very simple but highly reliable temporary form lock between the pusher 9 and the belt 7 or another suitable stack advancing conveyor, the pusher 9 and the moving and retracting means therefor occupy a small amount of space, and the pusher can invariably advance at the speed of the belt 7 in an optimum position relative to the adjacent stack or stacks 2.
As already mentioned above, the means for temporarily coupling the pusher 9 or an equivalent pusher to the belt 7 can include a magnetic system, e.g., a magnetizable pusher and a magnetic film or coat on the belt 7. Such magnetic system can be employed in addition to or in lieu of the illustrated coupling means including the ports 11 and the suction generating device 12 with the control means therefor.
Another important advantage of the improved apparatus is that the novel means for preventing deformation of stacks during transport by the advancing conveyor can be installed in many existing stack transporting apparatus, e.g., in apparatus of the type disclosed in the aforediscussed commonly owned US patent to Aykut et al.
Though the illustrated apparatus is designed to ensure that the pusher 9 is coupled to the belt 7 only during acceleration of stacks 2 from zero speed to a select-ed speed, it is clear that the means for returning or retracting the pusher to its starting position c~an be actuated subsequent to advancement of the pusher beyond the extended position of FIG. 3. This would even further reduce the likelihood of deformation of stacks 2 on their way toward and onto the conveyor 8.
Claims (15)
1. Apparatus for transporting stacks of a series of stacks of overlapping flat objects in a predetermined direction, comprising a stack advancing conveyor; means for repeatedly starting and driving said conveyor to advance the stacks thereon in said direction with attendant acceleration of stacks in response to each starting of the conveyor; and means for preventing deformation of stacks during acceleration including at least one pusher for stacks on said conveyor and means for moving said at least one pusher in at least substantial synchronism with said conveyor at least during the acceleration of stacks.
2. The apparatus of claim 1, further comprising means for supplying to said conveyor stacks in a second direction transversely of said predetermined direction.
3. The apparatus of claim 2, wherein said means for supplying includes a second conveyor having means for delivering to said advancing conveyor groups of stacks with the stacks of each group at least substantially aligned in said predetermined direction.
4. The apparatus of claim 3, wherein each of said groups includes a last stack, as seen in said predetermined direction, and said at least one pusher is located behind the last stack of the group of stacks on said advancing conveyor.
5. The apparatus of claim 1, wherein said means for moving said at least one pusher includes means for temporarily coupling said at least one pusher to said conveyor.
6. The apparatus of claim 5, wherein said coupling means includes means for compelling said at least one pusher to share the movements of stacks on said conveyor in said predetermined direction at least during acceleration of the stacks.
7. The apparatus of claim 5, wherein said coupling means includes means for establishing a temporary form locking connection between said conveyor and said at least one pusher.
8. The apparatus of claim 5, wherein said coupling means includes means for temporarily attracting said at least one pusher to said conveyor.
9. The apparatus of claim 8, wherein said means for temporarily attracting includes at least one suction generating device.
10. The apparatus of claim 9, wherein said conveyor includes an impermeable mobile support for stacks and said at least one pusher has an underside adjacent said support, said suction generating device comprising at least one suction port in said underside.
11. The apparatus of claim 1, further comprising means for returning said at least one pusher to a starting position by moving said at least one pusher counter to said predetermined direction upon completion of each starting of said conveyor.
12. The apparatus of claim 11, wherein said returning means comprises a fluid-operated motor.
13. The apparatus of claim 12, wherein said motor includes a double-acting pneumatic cylinder and piston assembly.
14. The apparatus of claim 1, wherein said conveyor includes an endless flexible belt having a stack-supporting upper reach and said means for moving includes means for temporarily attracting said at least one pusher to said upper reach.
15. The apparatus of claim 14, wherein said belt is impermeable to fluids and said means for attracting includes a suction generating device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995107049 DE19507049A1 (en) | 1995-03-01 | 1995-03-01 | Device for transporting sheet layers |
| DE19507049.6 | 1995-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2170808A1 true CA2170808A1 (en) | 1996-09-02 |
Family
ID=7755296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2170808 Abandoned CA2170808A1 (en) | 1995-03-01 | 1996-03-01 | Apparatus for preventing deformation of stacks of flat objects during speed changes |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0729907A1 (en) |
| JP (1) | JPH08259074A (en) |
| CA (1) | CA2170808A1 (en) |
| DE (1) | DE19507049A1 (en) |
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| CN102976093A (en) * | 2012-12-06 | 2013-03-20 | 信阳市四通机械制造有限公司 | Drying and feeding device for expanded perlite plates |
| CN103043430A (en) * | 2012-12-28 | 2013-04-17 | 江阴大地装备股份有限公司 | Feeding device for large bars |
| CN103662763A (en) * | 2013-11-18 | 2014-03-26 | 无锡市正阳机械有限公司 | Sheet conveying device |
| CN104176524A (en) * | 2014-08-14 | 2014-12-03 | 天津长荣印刷设备股份有限公司 | Automatic feeding device and operating method thereof |
| CN110194366A (en) * | 2019-05-29 | 2019-09-03 | 襄阳汇博机械设备有限公司 | A kind of bidirectional hydraulic pusher |
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|---|---|---|---|---|
| EP0979204B1 (en) * | 1997-04-30 | 2002-09-25 | Siemens Aktiengesellschaft | Device for transferring articles between two conveyors |
| DE10140842A1 (en) * | 2001-08-21 | 2003-03-06 | Bielomatik Leuze & Co | Acceleration conveyor for stacks of reams has transporting slide consisting of carriage below transporting plane and at least one rod projecting above this plane |
| CN101804916A (en) * | 2010-03-02 | 2010-08-18 | 句容金猴机械研究所有限公司 | Automatic tile picking device |
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| CN102991980A (en) * | 2012-12-11 | 2013-03-27 | 山东科技大学 | Plate loading device |
| CN106865198A (en) * | 2015-12-14 | 2017-06-20 | 天津市格瑞达工贸有限公司 | A kind of feeding pushing mechanism |
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Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805757A (en) * | 1955-10-31 | 1957-09-10 | Cutler Hammer Inc | Newspaper conveyors |
| DE1096283B (en) * | 1956-01-11 | 1960-12-29 | Courtaulds Ltd | Conveyor for feeding stacks of rigid plates to a dividing device for individual delivery |
| DE1959549U (en) * | 1963-07-24 | 1967-05-03 | Fischer & Krecke Kg | APPLICATION DEVICE FOR CUTTING WORK PIECES, IN PARTICULAR HOSES. |
| DE2160709B1 (en) * | 1971-12-07 | 1973-05-24 | Windmoller & Holscher, 4540 Len gench | CONVEYOR DEVICE FOR TRANSFERRING STACKS OF PAPER OR PLASTIC HOSE SECTIONS FROM A HOSE MACHINE INTO A FLOOR PLAYER |
| DE2437665C3 (en) * | 1974-08-05 | 1979-01-11 | Windmoeller & Hoelscher, 4540 Lengerich | Device for transporting away a stack of flat workpieces, in particular hose sections or sacks |
| CH579496A5 (en) * | 1975-02-03 | 1976-09-15 | Grapha Holding Ag | |
| DE2900178A1 (en) * | 1979-01-04 | 1980-07-17 | Keller Gmbh & Co Kg | Roof tile handling separating unit - moves tiles standing upright in parcels into flat position with holding band, holding wheels are coordinated with conveyor system |
| IT1112722B (en) * | 1979-04-24 | 1986-01-20 | Sitma Soc Italiana Macchine Au | STACKER FOR SLICED SHAPED SHAPES, WHICH NEWSPAPERS AND, REVISED |
| DE3116679A1 (en) * | 1980-05-10 | 1982-01-28 | E.C.H. Will (Gmbh & Co), 2000 Hamburg | Transport finger of a transport system extending along a conveyor track |
| DE3214350C2 (en) * | 1981-05-08 | 1986-05-28 | E.C.H. Will (Gmbh & Co), 2000 Hamburg | Device for transporting sheet layers |
| JPH0617168B2 (en) * | 1981-05-08 | 1994-03-09 | エ−・ツェ−・ハ−・ウイル・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Sheet layer transport device |
| FR2616421A1 (en) * | 1987-06-15 | 1988-12-16 | Bet B Roulon | Rapid loading device, particularly for transferring objects between two transporters |
| DE4100458C2 (en) * | 1991-01-09 | 1996-12-05 | Erwin Jenkner | Panel feeder for panel sizing saws |
| DE4135727A1 (en) * | 1991-05-03 | 1992-11-05 | Rueckle Carl Maschinenbau | Collecting together individual wooden elements from packets - by subjecting them to various stages of sepn. and gluing of edges and pressing together to form panels of parquet flooring |
| US5386981A (en) * | 1992-12-11 | 1995-02-07 | Dainippon Ink & Chemicals, Inc. | Automatic paper processing method and cut-sheet feed rotary press having automatic paper processing apparatus |
| DE4309485A1 (en) * | 1993-03-24 | 1994-09-29 | Schmidt Rsa Entgrat Tech | Loading system for the automatic aligned feed of parts to a machining station |
-
1995
- 1995-03-01 DE DE1995107049 patent/DE19507049A1/en not_active Ceased
-
1996
- 1996-02-28 JP JP4152196A patent/JPH08259074A/en not_active Withdrawn
- 1996-03-01 CA CA 2170808 patent/CA2170808A1/en not_active Abandoned
- 1996-03-01 EP EP96102431A patent/EP0729907A1/en not_active Withdrawn
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| CN102976093A (en) * | 2012-12-06 | 2013-03-20 | 信阳市四通机械制造有限公司 | Drying and feeding device for expanded perlite plates |
| CN102976093B (en) * | 2012-12-06 | 2016-05-04 | 信阳市四通机械制造有限公司 | Expanded perlite sheet material is dried plate feeding device |
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| CN103043430B (en) * | 2012-12-28 | 2016-01-20 | 江阴大地装备股份有限公司 | The feeding device of big stick-means of intimidation |
| CN103662763A (en) * | 2013-11-18 | 2014-03-26 | 无锡市正阳机械有限公司 | Sheet conveying device |
| CN104176524A (en) * | 2014-08-14 | 2014-12-03 | 天津长荣印刷设备股份有限公司 | Automatic feeding device and operating method thereof |
| CN110194366A (en) * | 2019-05-29 | 2019-09-03 | 襄阳汇博机械设备有限公司 | A kind of bidirectional hydraulic pusher |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08259074A (en) | 1996-10-08 |
| DE19507049A1 (en) | 1996-09-05 |
| EP0729907A1 (en) | 1996-09-04 |
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