JP2005306454A - Multi-stage stacker for stick-like individual package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-stage stacker for individual package, which arranges and boxes sets of individual packages in two or more stacks, each set consisting of a predetermined number of individual packages manufactured such that granular medicine, food, or the like is stored in the form of stick-like individual packages. <P>SOLUTION: The multi-stage stacker is used for arranging and boxing sets of stick-like individual packages in at least two or more stacks, each set consisting of the predetermined number of individual packages collected by an individual package collecting machine. The multi-stage stacker includes a rack lifting/lowering device having a multi-stage movable placing rack; a loading pushing means for successively pushing sets of individual packages from the individual package collecting device onto the movable placing rack, and a delivery pushing means for collectively pushing the two or more stacks of sets of individual packages on the placing rack into a delivery container used for boxing. The rack lifting/lowering device has an endless rotating means which rotate around a pair of rotors vertically arranged and intermittently rotated. The endless rotating means is provided with many placing plates disposed at fixed intervals so as to project outward. The two or more placing plates project horizontally and used as the multi-stage movable placing rack. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The stick-like sachet is manufactured by a sachet making machine that measures a predetermined amount of a powder of medicine or food and fills the stick-like container. The sachet has a cylindrical shape with both ends sealed by thermocompression bonding, and is a container in which a predetermined amount of the above powder is placed in a cylindrical body. The sachets produced by the sachet making machine are sequentially transferred and packed by a boxing machine every predetermined number. At the time of packaging, stick-shaped packages are arranged in parallel in a horizontal direction so that a predetermined number of packages are in close contact with each other, and are preliminarily collected into an aggregate. The packaging and accumulating machine is used to efficiently and automatically pack such stick-shaped packaging into a packaging body.

  As for the conventional technology, on a conveyor (for example, in a bucket conveyor) connected from a sachet making machine to a sachet stacker, usually, stick-like sachets are received and arranged one by one at regular intervals. A transverse groove is formed at right angles to the transport direction and transports the package to the package stacker. For example, as disclosed in Patent Document 1, a conventional packaging and stacking machine is provided with a certain number of substantially parallel guide lanes arranged along a conveyor, and one end of the guide lane is equal to the lateral groove. Arranged at the edges of the conveyor at intervals perpendicular to the transport direction of the conveyor (and thus parallel to the longitudinal direction of the stick-like package on the conveyor), these multiple guide lanes have their respective tips (exit ends) ) The sides are inclined downwards and spaced from each other and are arranged to communicate with the opening of the box-like container to be boxed, while the opposite edge of the conveyor pushes the package into the guide lane The thing of the structure where the pusher for this was provided is known.

  When using this packing and stacking machine, the packings arranged and conveyed by the conveyor are pushed out to the guide lane side by the pusher at the position corresponding to the guide lane, and slide through the guide lane into the box. . As a result, the box-shaped container is packed in a box-shaped container, and the packed box-shaped container is pushed onto the conveyor and moved, and the next empty box-shaped container is arranged at the tip of the guide lane.

The present applicant has proposed another rotary type packing and stacking machine (Patent Document 2). This includes a rotating body fixed to a horizontal rotating shaft that is driven by a motor and is capable of stepping rotation, and a plurality of stacks formed radially on the outer edge of the rotating body, and is provided with a rotating stacking device that rotates sequentially, A filling device is provided on the entrance side, and each package that is transported one by one is sequentially stacked in the stack in the desired number and filled. Each time a predetermined number of packages are stacked in the stack, the rotating body of the rotary stacking device is rotated by one step, and further filled in the next stack. On this outlet side, an accumulation body unloading device that receives and transfers the accumulation bodies of each accumulation warehouse for each accumulation body is provided and is carried out as an accumulation body.
JP-A-62-99504 Japanese Patent Laid-Open No. 11-208605

  A packaging box for storing actual sachets often contains 2 to 3 stages of such an aggregate, but with a conventional sachet and stacker, only one stage of the sachet is prepared. Can not. Therefore, it is necessary to collect the aggregates from the packaging and accumulating machine into two or three stages. For this purpose, the aggregates are extruded one by one into another container and then added, and the aggregates are collected in the container. Was further extruded and charged into a packaging box. In such operations, the packaging may be scattered within the container, and it may not be possible to load all the packages in the packaging box at the time of packaging. Decreased, causing problems.

  In view of such a problem, the present invention has two or several stages in advance in order to facilitate the packing of the packed product collected by the packing and collecting machine into a packaging container or the like of the packed product. It is intended to provide an apparatus for stacking.

  The multi-stage stacking machine according to the present invention is a multi-stage stick-shaped package for stacking a stack of stick-shaped packages collected in a predetermined number by a package stacking machine in two or more layers. The stacking machine is characterized in that the multi-stage stacking machine sequentially pushes the shelf stacking device having a multi-stage vertically movable mounting shelf and the packaging stack from the packaging stacking machine onto the movable mounting shelf. The pushing means for loading, the carry-out container for receiving the package stacks stacked in two or more stages, and the package stacks on the upper and lower stacking shelves in the transport container And pushing out means for pushing out.

  Specifically, the shelf elevating device includes a pair of rotating bodies that are vertically arranged and intermittently driven to rotate, an endless circulating means that is rotatively stretched between the pair of rotating bodies, and an endless rotating means that are spaced at regular intervals. A plurality of mounting plates that are provided and project outward, and in the vertical region of the endless circulation means, the upper and lower two or more mounting plates project horizontally to form a multi-stage movable mounting shelf A lifting member is included. In this apparatus, the package stack transferred from the package stacker is placed on one of the mounting shelves using the loading pushing means, and then the mounting shelf is raised by one step or The descending operation is repeated, and the package stack is placed on two or more placement shelves. The two or more levels of the package stack placed on the mounting shelf are collectively pushed out by the carry-out pushing means into the carry-out container, and the respective packages are parallel and stacked in the carry-out container. Moved to and held.

  In particular, the shelf elevating device is provided with a pair of the shelf elevating members, and is arranged so that the end portions of the mounting plates of the endless circulation means are opposed to and close to each other between the endless circulation means. The plurality of mounting plates are preferably mounting shelves in which the opposing mounting plates are substantially on the same plane.

The rotating body and the endless circulating means use a combination of a sprocket arranged on the upper and lower horizontal shafts and a chain that is engaged with the upper and lower sprockets and stretched between the sprockets, and the mounting plate has one end side thereof. It is fixed to the chain element at every fixed interval of the chain, and the placing plate protrudes from the chain.
In another form, the rotating body and the endless circulating means may be gears arranged vertically and a toothed belt that meshes with these gears. In this case, the mounting plate has one end thereof on the outer surface of the belt. In addition, the protrusions are fixed at equal intervals in the belt direction.

  The charging pushing means includes at least two stages in the vertical direction including a contact plate that contacts the end of the package stack on each mounting shelf and an air cylinder that pushes and pulls the contact plate. The pusher is available.

  Further, at the rear of the shelf lifting device, at least two upper and lower carry-out guides are provided immediately after the movable mounting shelf, and a series of carry-out containers are provided at the rear thereof. Preferably, the carry-out container is one in which a plurality of containers are connected in series by a carry-out device, and can be sequentially moved while being stacked up to the packing position.

  In the present invention, the carry-out pushing means pushes out the package stack on the movable loading shelf at least on the lower two stages from the front side of the shelf elevating device, slides on each carry-out guide, and batches it into the carry-out container. And pushing in.

The carry-out pushing means abuts against the end of the package stack on the movable mounting shelf and pushes the stack into the carry-out container, and air for pushing and pulling the contact plate And a pusher including a cylinder.
The carry-out pushing means is provided with at least two pushers including an air cylinder, and the number of pushers to be operated is set in advance.

  Such a multi-stage stacker further comprises a carrying-out means for arranging and moving the carrying-out container, and a boxing pushing means for packing the multi-stage stack in the carrying-out container at a predetermined position. Have

  The multi-stage stacker of the present invention includes a shelf lifting device having multi-stage movable mounting shelves, loading pushing means for sequentially pushing the package stacks from the packaging stacker into the movable mounting shelves, and upper and lower Since there is a pushing-out means for carrying out the package stacking bodies on the two or more stages of loading shelves collectively into a series of shipping containers, each shipping container has a packing stack from the packaging stacking machine. Further, it can be accommodated in a multi-stage stack, and the multi-stage package assembly in the carry-out container can be further transferred to a packaging container, and a large number of stick-shaped package assemblies are made into multi-stages. Can be packaged together and used for boxing.

  The shelf lifting device is arranged vertically and is driven intermittently and rotated endlessly, the endless rotating means that can circulate around the pair of rotating bodies, and the endless rotating means spaced apart at regular intervals and projecting outward In the vertical region of the endless circulation means, the two or more mounting plates protrude horizontally and include a shelf lifting member that forms a multistage movable mounting shelf. It is effective for stacking in multiple stages and pushing it out to the carry-out container.

  In the above-described shelf lifting device, two shelf lifting members are provided between the endless surrounding means so that the end portions of the mounting plates of the endless surrounding means face each other and are close to each other. Since the mounting plate is used, it becomes easy to arrange the package assembly on the mounting shelf without fear of dropping.

  The above rotating body is a sprocket, the endless circulation means is a chain that meshes with the sprocket, and the mounting plate is fixed to the chain element on the other end side, so that it does not slip relative to the rotation axis of the sprocket. The raising / lowering of the mounting shelf by the mounting plate can be controlled.

  The above-described charging push means is a pusher including an abutment plate that abuts the wrapping end portion and an air cylinder for pushing and pulling the abutment plate. Can be pushed onto the mounting shelf.

  The rear part of the shelf lifting device is provided with two or more stages of carry-out guides immediately after the movable placing shelf, and the rear part is provided with a receiving and conveying means having a series of carry-out containers for transportation. The advancement means can push the package stacks on the movable mounting shelf into the transport carry-out container in a multi-stage reliably and orderly from the front side of the shelf elevating device.

FIG. 1 and FIG. 6 show an example of a multi-stage stacker of stick-shaped packaging according to the present invention.
This multi-stage stacker includes a shelf elevating device 3 (3a, 3b) having a multi-stage movable mounting shelf, and a stack conveying means 1 for transferring the package stack from the package stacker to the shelf lifting device to the front side. Loading pushing means 2 that are sequentially pushed into the movable placing shelf; unloading pushing means 6 that pushes the package stacks on the upper and lower placing shelves collectively to the shelf lifting device; On the rear side of the shelf lifting / lowering device 3, there is an unloading container 51 that directly receives a two or more-stage package assembly, and unloading transport means 5 that transports the unloading container.

  The shelf elevating device 3 is shown as a top view in FIG. 1, more specifically as a side view in FIG. 2, and further as a perspective view in FIG. 3, but in this example, a pair of left and right shelf elevating members 3a placed opposite to each other. , 3b. Each of the shelf elevating members 3a and 3b includes a pair of rotating bodies arranged vertically, sprockets 31a and 31a (31b and 31b) supported on the rotary shafts 30a and 30b, and the upper and lower sprockets 31a and 31a (31b, In FIG. 31b, two parallel rows of chains 32a and 32a (32b and 32b) are wound as endless circulation means.

  A large number of mounting plates 33 (33a, 33b) having a substantially rectangular outer shape are fixed to the outer peripheral side of the chains 32a, 32b. These mounting plates 33 are connected to the outer peripheral surfaces of the chains 32a, 32b. Are spaced apart at regular intervals and are arranged to project outward.

  In two parallel rows of chains 32, attachments 322 project from the chain elements at regular intervals (see FIG. 3). In each case, each mounting plate 33 is provided with an enlarged portion 331 at the edge thereof, and the mounting plate 33 is fixed by screwing the end surface of the enlarged portion 331 to the attachment 322 described above. Is fixed to the chain 32 so as to project at right angles to the direction of the chain.

  In the vertical region between the chains 32a and 32b, the shelf elevating members 3a and 3b protrude in the horizontal direction so that the corresponding left and right mounting plates 33a and 33b are close to each other, and are substantially flush. It is used as a mounting shelf 34. In this way, in the vertical region where the two shelf elevating members 3a and 3b face each other, the placement plates that are opposed to each other so that the outer edge portions 36 and 36 of the placement plates 33a and 33b come into contact with each other. The tops 33a and 33b are used as shelves on which the package assembly is placed, and a multi-stage, in this example, a 5-stage movable mounting shelf 34 is configured.

  As shown in FIG. 3, the shelf elevating members 3a and 3b have drive and driven gears 301 connected and fixed to the drive shafts 30a and 30b of the left and right sprockets 31a and 31b. Are coupled to each other by a pair of reversing gears 302 and 302, and as a result, the left and right sprockets 31a and 31b rotate at the same speed and opposite to each other. In this case, the drive shaft 30b of the sprocket 31b is intermittently rotated to rotate at the same speed and in opposite directions to each other, and the chains 32 and 32 are driven by the sprocket between the upper and lower rotating bodies to circulate. Thus, the movable mounting shelf 34 in the vertical region between the two shelf elevating members 3a and 3b can be raised or lowered. Normally, the movable mounting shelf 34 is set so as to always descend intermittently. The movable mounting shelf 34 can be set to rise.

  In order to drive the shelf lifting / lowering members 3a and 3b, the drive shaft 30b of one shelf lifting / lowering member 3b transports the package stack 9 from the package stacker to the front side of the shelf lift 3. Are driven intermittently through a sprocket 303 and a chain (not shown). As a result, the movable mounting shelf 34 is interlocked with the stacked body transport means 1, and when the stacked body 9 comes immediately before the movable mounting shelf 34 and is stopped by the stacked body transport means 1, The drive is controlled so that the shelf is formed and stopped.

  In particular, preferably, the outer edges 36, 36 of the mounting plates 33a, 33b are formed with free ends of the concavo-convex portions 361 in a tooth shape, and when the left and right mounting plates 33a, 33b abut, The concave and convex portions 361 are engaged with each other. Thereby, since it can prevent that the clearance gap which follows a longitudinal direction on a mounting board can be formed, the danger that any packaging of the package integration | stacking body 9 will fit in a clearance gap can be prevented.

  Moreover, the side part guide 35 is formed in the mounting plate 33a, 33b as a protrusion on the upper surface near an inner edge side. On the mounting shelf 34 of each stage, the package stack 9 can be stably and neatly placed as is between the side edge guides 35, 35 formed on both sides.

  On the front side of the shelf lifting apparatus, there is provided a stack conveying means 1 for transferring the package stack 9 from the packing stacker to the front side of the shelf lifting apparatus 3. In FIG. 1, FIG. 2 and FIG. 4, in this example, the stack conveying means 1 has a large number of holding members 12a and 12b forming a movable set, and is arranged between a pair of front and rear holding members 12a and 12b. Then, a predetermined number of parcels are transported across the ventral side of the parcel assembly 9 in which the parcels are arranged in parallel.

  A plurality of pairs of sandwiching members 12a and 12b are fixed to the chain 10b (see FIG. 2) at regular intervals and can be moved by the circulation of the chain. The package assembly 9 is sandwiched between the sandwiching members 12a and 12b. While being held between the two, the chain 11 moves while sliding on both sides of the chain or on the guide 11 between the chains. In this way, the stack transport means 1 sequentially uses the package stacks 9 for the predetermined movable mounting shelf 34 of the shelf lifting device 3 (usually, the uppermost mounting shelf among the mounting shelves). Immediately before the loading side guide 29 is stopped, it can be stopped and positioned accurately.

  The loading pushing means 2 sequentially pushes the package stack 9 transferred to the front side of the shelf lifting device 3 by the stack transport means 1 into the movable mounting shelf 43. An air cylinder drive pusher is used as the entry pushing means 2.

  In FIG. 1, FIG. 4 and FIG. 6, the pusher comprising the pushing shaft 22 connected to the air cylinder 20 and the abutting plate 21 whose tip is widened in a T shape is integrated just before the movable mounting shelf 34. It is set so as to cross over the guide 11 of the body conveying means 1. As described above, the contact plate 21 of the pusher is disposed on each of the stacks 9 of the packs 9 with respect to the packs 9 positioned in front of the movable mounting shelf 34 of the shelf lifting device 3 by the stack transport means 1. Abutting against the tip of the package, the integrated body 9 is pushed onto the movable mounting shelf 34 through the loading guide 29 and integrally.

  Usually, the pusher which is the pushing-in pushing means 2 is arranged so as to push the stack 9 into the movable mounting shelf 34 located at the uppermost stage in the vertical region of the shelf lifting device 3. The packaging is pushed into the movable mounting shelf 34 of the shelf lifting device, and then the clamping members 12a, 12b move by one step, and in conjunction with this movement, the drive shafts 30a, 30b of the shelf lifting device 3 Is rotated to lower the movable mounting shelf 34 by the height of one step, and an empty movable mounting shelf 34 is further formed at the uppermost stage. Further, another package stack 9 transported by the stack transport means 1 is pushed into the movable mounting shelf 34 by using the loading pushing means 2, and the movable mounting shelf 34 is moved up one stage. Lower by minutes. By repeating such an operation, the package stack 9 is placed on the desired number of movable placement shelves 34.

  The pushing means for loading may be a pusher that pushes and pulls the contact plate using a motor drive or a solenoid instead of the air cylinder.

  In FIG. 5, the multi-stage stacker of this example further includes means for carrying out the stacked bodies 9 stacked in multiple stages in the same number of stages. A multistage unloading guide 4 (4a, 4b, 4c) is provided at the rear of the shelf lifting device 3 immediately after the movable mounting shelf 34, and a unloading conveyance having a series of unloading containers 51 for the rear thereof. Means 5 is arranged, and on the front side of the shelf lifting and lowering device 3, there is a push-out pushing means 6 for pushing the package stacks 9 on the movable mounting shelf 34 into the carry-out container 51 in a lump. .

  In FIG. 5, the carry-out guide 4 is composed of three-stage carry-out guides 4a, 4b and 4c which are stacked one above the other. Each guide has a flat surface or an inclined surface, and has an edge 41 on both sides. The upper surfaces of the carry-out guides 4a, 4b, 4c are flush with the upper surfaces of the lower three-stage movable mounting shelves 34, 34, 34 when stopped. Or it is fixed to be slightly lower. If the package assembly 9 on the movable placement shelves 34, 34, 34 is extruded, it can be easily moved onto the corresponding carry-out guide 4.

  As shown in FIGS. 5 to 7, the unloading conveying means 5 is a box-shaped series of unloading containers 5 that are open at both ends, fixed on a chain 52 that circulates. A series of carry-out containers 51 can be moved by the rotation of the chain 52 and placed on the guide 53. By driving the motor of the chain 52, the series of carry-out containers 51 can move intermittently so that the open ends thereof are stopped and moved toward immediately before the carry-out guide 4.

  As shown in FIGS. 6 and 7, the carry-out pushing means 6 is in front of the shelf lifting device 3 and abuts at right angles to the propulsion shaft connected to the ends of the air cylinder 60 and the pushing shaft 62. A pusher made of a plate 61. As shown in FIG. 6, the unloading pushing means 6 is arranged directly below the loading pushing means 1, and the pushing shaft of the unloading pushing means 6 intersects directly below the stack conveying means 1. Are arranged.

  The pusher of the carry-out pushing means 6 has a number of stages corresponding to the lower movable mounting shelf 34. In this example, three contact plates 61a, 61b, 61c are provided and driven by independent air cylinders 60a, 60b, 60c, respectively. A required contact plate can be selected by selecting the air cylinders 60a, 60b, 60c to be operated.

  By the operation of the carry-out pushing means 6, the contact plates 61 a, 61 b, 61 c of the selected pushers are moved from the front of the movable placement shelf 34 of the shelf lifting device 3 to the movable placement shelf 34 and each carry-out guide 4. The stroke reaches the opening end of the carry-out container 51 through the upper surface. By extruding the pusher, the package stack 9 placed on the movable placement shelf 34 of the shelf lifting device 3 is pushed out, and further passes through the upper surface of each carry-out guide 4a, 4b, 4c, and the above-mentioned carry-out container It is transferred to the inside of the open end of 51. FIG. 7 shows the stroke of the pusher 61 c for pushing the package assembly 9 on the movable mounting shelf into the carry-out container 51 by the lowermost pusher 61 c.

  As the carry-out pushing means, a pusher that pushes and pulls the contact plate using a motor or a solenoid is used instead of the pusher driven by the air cylinder.

  In this way, the carry-out pushing means 6 simultaneously pushes the two-stage or three-stage pushers so that the package stack on the two-stage or three-stage movable mounting shelf is simultaneously placed in the carry-out container. It can be moved while holding two or three stages. In this way, the package stacks on the movable mounting shelves in a plurality of stages are accumulated, and then the package stacks are transported in an orderly manner in a state of being stacked in a plurality of stages by using the push-out pushing means 6. They can be collected in the container 51. Accordingly, the package assembly in the carry-out container 51 can be further filled in a packaging container (not shown) for packing using the same pushing means (not shown) in the next step.

  As described above, in the multi-stage stacker of this embodiment, the shelf lifting device intermittently lowers the movable mounting shelf 43, and the loading pushing means 2 is moved by the stack conveying means 1 to the shelf lifting device. When the package stack 9 transferred to the front side is stopped, it is sequentially pushed onto the uppermost movable mounting shelf 43, and the shelf lifting device lowers the movable mounting shelf 43 to the upper and lower movable mounting shelves 43. The process of placing the package assembly 9 is continued. On the other hand, the carry-out pushing means 6 is configured to push out two or three pushers from the bottom at the same time each time the movable mounting shelf 43 on which the package stack 9 is placed reaches the lowest stage. Alternatively, the three-stage stacked package assembly can be systematically transferred to the unloading container 51 of the unloading transport means 5 and is moved by one unloading container each time the unloading container receives the package stack.

  The carrying means for carrying out is further provided with a boxing pushing means for packing the multistage assembly in the carrying container at a predetermined position, which is not shown in the figure. A certain package assembly is further filled with a package in a product packaging container and then boxed.

The top view which shows the multistage stacker of the stick-shaped package which concerns on embodiment of this invention. The front view which shows the outline | summary of operation | movement of the shelf raising / lowering apparatus of the multistage stacker which concerns on embodiment of this invention. The perspective view of the multistage stacker which shows the basic structure of the shelf raising / lowering apparatus of the multistage stacker which concerns on embodiment of this invention. The perspective view which shows the front side of a shelf raising / lowering apparatus of a multistage stacker according to an embodiment of the present invention and a package assembly transport means. The perspective view which shows the rear side of the shelf raising / lowering apparatus of the multistage stacker according to the embodiment of the present invention and the carrying means for carrying out. The side view which shows the multistage stacker concerning embodiment of this invention including the conveyance means for carrying out, and the pushing-out means for carrying out. It is a cross-sectional view which shows the multistage stacker which concerns on embodiment of this invention including the pushing-out means for insertion, the conveying means for carrying out, and the pushing-out means for carrying out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condensate conveyance means 2 Loading pushing means 3 Shelf raising / lowering device 31 Sprocket 32 Chain 33 Mounting plate 34 Movable loading shelf 4 Unloading guide 5 Unloading conveying means 51 Unloading container 6 Unloading pushing means

Claims (9)

In a multi-stage stacking machine for stacking at least two or more sachets in which stick-like sachets are collected in a predetermined number by a sachet accumulator;
A multi-stage stacker includes a shelf lifting device having a multi-stage movable mounting shelf, a charging push means for sequentially pushing the packaging stack from the packaging stacker into the movable mounting shelf, and two or more stages. An unloading container for receiving the stacked package stacks, and an unloading pushing means for collectively pushing the package stacks placed on the upper and lower mounting shelves into the unloading container. A multi-stage stacker for stick-shaped sachets, characterized by comprising: The shelf elevating device is provided with a pair of rotating bodies arranged vertically and driven to rotate intermittently, an endless rotating means that can be circulated around the pair of rotating bodies, and an endless rotating means spaced apart from each other at regular intervals. Comprising a plurality of mounting plates protruding outward, and two or more mounting plates horizontally projecting in the vertical region of the endless circulating means to include a multistage movable mounting shelf,
By repeating the operation of placing the package stack transferred from the package stacking machine on one of the mounting shelves by the loading pushing means and raising or lowering the mounting shelf one step at a time. The multi-stage stacker for stick-shaped packages according to claim 1, wherein the package stack is mounted on the mounting shelf.   In the above-described shelf lifting device, a pair of the shelf lifting members are provided so that the free end portions of the mounting plates of the endless surrounding means are opposed to and close to each other between the endless surrounding means. The multi-stage stacking machine according to claim 2, wherein the mounting plate is a mounting shelf in which each opposing mounting plate forms substantially the same surface.   The rotating body is a sprocket, the endless circulating means is a chain that is engaged with the sprocket and stretched up and down, and the mounting plate has its fixed end fixed to a chain element. The multistage stacker according to claim 2 or 3.   The above-mentioned push-up means for loading is a pusher including a contact plate that contacts the end of the package stack that has been moved immediately before each mounting shelf and an air cylinder that pushes and pulls the contact plate. The multistage stacker according to claim 1, wherein The rear part of the shelf lifting device is provided with at least two upper and lower carry-out guides immediately after the movable placing shelf, and the rear part is provided with a carrying means for carrying out having a series of carry-out containers,
The carry-out pushing means pushes the package stacks on at least the lower two movable loading shelves into the carry-out container collectively from the front side of the shelf lifting device via the carry-out guides. The multistage stacker according to claim 2 or 3.   The unloading pushing means abuts against the end of the package stack on the movable mounting shelf and pushes the stack into the unloading container, and air for pushing and pulling the contact plate The multistage stacker according to claim 1, 2 or 6, wherein the pusher includes a cylinder.   The multistage stacker according to claim 7, wherein the carry-out pushing means is provided with pushers including an air cylinder in at least two stages, and the number of pushers to be operated is set in advance. The multi-stage stacker further includes a carrying-out means for moving the above-mentioned carry-out containers in an array, and has a boxing pushing means for packing the multi-stage stack in the carry-out container at a predetermined position. The multistage stacker according to claim 1, 6 or 7, characterized by the above.

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