JPH0516741U - Case loading device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a case unloading device for mechanically performing unloading work of transport cases stacked on pallets. [Structure] A group of containers stacked at the front end of the pallet on the feed side is brought into contact with an alignment plate that is erected at the unloading position of the transportation conveyor, and the pressing plate of the unloading vehicle that stands by at the unloading position is placed on the pallet sending side The container groups stacked on the rear end are pressed into contact with each other, and the container groups stacked on the same pallet are adjusted in the shipping direction, and then unloaded by one row. In addition, the pallet and the unloading vehicle are moved relative to each other by one pitch for unloading the container group for one row, and the container groups stacked on the pallet are sequentially unloaded while correcting the direction of the container to the shipping direction. , The mechanical work for successively unloading the containers stacked on the pallet can be performed smoothly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a case unloading device used for sequentially unloading a case group in which a plurality of transport cases such as a synthetic resin container and a cardboard box are stacked from a pallet.

[0002]

[Prior Art]

 Conventionally, when a case group in which a plurality of transport cases such as the above example are stacked is sequentially unloaded from a pallet, for example, a transport case in which a product is loaded from the upper side of each case group stacked on the pallet. Multiple workers will pick up one case by one hand and unload them sequentially.

[0003]

[Problems to be solved by the device]

 However, as described above, since a large number of transport cases are sequentially loaded and unloaded by the operator one by one, the loading and unloading of the transport cases takes time and effort. Moreover, the number of stacking stages of the transport case is not only limited to the height at which the worker can load and unload, but the heavy transport case loaded with the product must be sequentially loaded from the top stage of the case group. However, there is a problem that work efficiency is poor.

Further, since each case group on the pallet is stacked by a plurality of workers, the stacking state of the case groups is not uniform. Moreover, the stacking state of the transport cases differs depending on the skill level of the operator, and if the transport cases loaded with the products are stacked in multiple stages, the center of gravity of the case group becomes high and the stacking posture becomes unstable. Therefore, the direction of the case groups is likely to be displaced due to vibrations and impacts that occur during the unloading work, and during the unloading work, the corners of the adjacent case groups come into contact with each other and the case groups stacked on the pallet are touched. There is a problem that it is not possible to unload one column for one column, and it is not possible to mechanically unload it.

In view of the above problems, the present invention makes it possible to mechanically perform the unloading work of the transport case by sequentially unloading the case groups stacked on the pallet in a state where the direction of the case groups is corrected to the shipping direction, and the labor saving of the work is achieved. It is an object of the present invention to provide a case-loading device that can improve efficiency and efficiency.

[0006]

[Means for Solving the Problems]

 In this invention, an alignment plate is erected on one side of a pallet transported to the unloading position of the above-mentioned transporting conveyor so as to face a case group stacked on the pallet, and the unloading position of the above-mentioned transporting conveyor is set. The case unloading device is equipped with a pressing plate for pressing the case group stacked on the pallet to the alignment plate side on the other side of the pallet conveyed to the case.

[0007]

[Action]

 In this invention, a group of cases stacked on one side of the pellet is brought into contact with an alignment plate that is erected at the unloading position of the transporting conveyor, and the pressing plate of the case unloading means that is arranged at the same position is attached to the pallet. Press the case group stacked on the other side to correct the direction of each case group stacked on the pallet to the loading direction, and then drive the case unloading means for one row stacked on the pallet. Unload the case group of. In addition, the pallets and the case unloading means are moved relative to each other by one pitch for loading the case groups for one row, and the case groups stacked on the pallet are corrected in the loading direction, and the rows are sequentially loaded one by one. Take it down.

[0008]

[Effect of the device]

 According to this invention, the case groups stacked on the pallet are aligned in the shipping direction by the pressing operation of the aligning plate and the pressing plate, so that the direction of each of the case groups can be surely corrected, and the case groups can be reliably corrected. Mechanical work for loading and unloading can be done smoothly, and labor saving and efficiency of unloading work can be achieved. However, since the case groups stacked on the pallet are sequentially unloaded while the direction of the case groups is restricted in the loading direction, it is possible to positively prevent the case groups from being displaced during the unloading work, and The loading and unloading work can be done smoothly, and the labor and work of artificially correcting the direction of the case groups stacked in multiple stages as in the conventional example can be omitted, and the personnel and time required for the work can be greatly reduced. ..

[0009]

【Example】

 FIG. 1 shows a case unloading apparatus 1 of the first embodiment used for sequentially unloading a synthetic resin container a from a pallet P. The case unloading apparatus 1 is an unloading device set on a conveyor 2 for transportation. A pallet P (see FIG. 7) in which 50 containers a are stacked at a position is conveyed, and the direction of each container group A ... Stacked on the pallet P is corrected to the shipping direction, and then the same position is set. The arranged unloading car 3 is moved to a position corresponding to the container groups A, A in the first to fifth rows stacked on the pallet P, and the case unloading machine 4 provided on the unloading side of the unloading car 3 is moved. Is driven to sequentially unload the container groups A, A in the first to fifth rows stacked on the pallet P 1, and at the same time, to drive the case separator 5 provided on the separation side of the loading car 3, Containing one row stacked in 5 layers A device that sequentially separating the group A, the A from the lower side.

As shown in FIGS. 2 and 3, the above-mentioned transport conveyor 2 has a feed chain between sprocket wheels 6 and 7 which are axially supported at the feed-side start end and the feed-side end of the transport conveyor 2. The feed chains 8 and 8 are stretched through the sprockets 10 and 11 and the chain 12 by the driving force of the feed motor 9 with a speed reducer arranged at the lower end side. Rotate synchronously with. That is, after placing a pallet P (see FIG. 7) in which 50 containers a are stacked on the feeding chains 8 and 8, the pallet P is transported and fed to the unloading position set during transportation. After unloading all the containers a ... Stacked on the pallet P, the empty pallets P placed on the feed chains 8 and 8 are conveyed and supplied to a pallet stacker (not shown) connected to the terminal end of the feed side. Stack and collect. In addition, on the pallet unloading side of the unloading position set on the transporting conveyor 2, the alignment plate 13 is erected at a height position where it is in contact with the container groups A, A stacked at the front end of the pallet P on the feed side. ing.

As shown in FIGS. 1 and 2, the above-mentioned loading car 3 has traveling rails 14 and 14 laid on the lower floor in parallel with the above-mentioned transporting conveyor 2 and on the traveling rails 14 and 14. The wheels 15 bearing on the lower surface side of the unloading vehicle 3 are engaged with each other, and the driving motor 16 with a reduction gear provided at the bottom of the unloading vehicle 3 drives the pallet P to form one row. The vehicle moves intermittently for one pitch to load and unload container groups A, A. In addition, on the pallet loading side of the unloading car 3, the pressing plates 17, 17 are pivotally supported so as to be openable and closable in the left and right directions at intervals wider than the carrying width of the carrying conveyor 2, and the pressing plates 17 are pivotally supported on both sides. , 17 are connected by an open / close arm 18, and a piston rod of an open / close cylinder 19 arranged on the upper side of the same is connected to an upper end of a pressing plate 17 which is axially supported on one side. That is, by the operation of the opening / closing cylinder 19, the closed position is in contact with one side of the container groups A and A stacked at the feed-side rear end of the pallet P and the feed-side ends of the pallet P are stacked. The container group A is rotated to an open position that allows passage of A.

As shown in FIGS. 1 and 3, the above-mentioned case loader 4 has a size that is in contact with the rear surface of the container group A stacked in five stages on the lower side of the traveling unit 20 constituting the same and on the load side. Vertically formed loading pushers 21 are vertically provided, and guide rollers 22 supported on both side surfaces of the traveling unit 20 are respectively mounted on traveling guides 23 and 23 installed above the loading vehicle 3. The piston rod of the unloading cylinder 24, which is engaged and disposed on the upper part of the unloading car 3, is connected and fixed to the traveling unit 20, and by the operation of the unloading cylinder 24, the unloading position on the conveyor 2 for transportation described above. The container groups A and A for one row are transferred to the retracted position facing the container group A in the rear row on the shipping side of the pallet P transported to the pallet P and the elevating conveyor 25 of the case separator 5 described later. The shipping pusher 21 is moved back and forth to the forward position.

As shown in FIGS. 3 and 4, the above-mentioned case separator 5 has an elevating frame 26 on one side of an elevating conveyer 25 formed to have a size for placing one row of container groups A 1, A 2. Are fixed to each other, and the guide rollers 27, which are rotatably supported at the upper and lower ends of the lifting frame 26, are engaged with the respective guide rails 28, 28 installed at both side positions, and the lifting cylinders are provided at the lower part of the same side. The piston rod of 29 is fixedly connected to the elevating frame 26, and by the operation of the elevating cylinder 29, the middle stage position which is horizontal to the pallet P conveyed to the unloading position of the above-mentioned transport conveyor 2 and the holding arm described later. A lower stage that is level with the conveyor 30 for disposing the containers a and a, which are held horizontally in 31 and 31, and a height position that separates the lowermost containers a and a. The elevator conveyor 25 is stopped at the position.

The above-mentioned holding arms 31, 31 are opposed to the side surfaces of the containers a, a stacked on the second stage from below on the elevator conveyor 25 that has stopped moving up and down to the middle position. The piston rods of the holding cylinders 32 and 32, which are rotatably supported and arranged on both upper side portions at the same position, are connected and fixed to the holding arms 31 and 31, and the holding cylinders 32 and 32 operate in synchronization. Thus, the holding arms 31 and 31 are stopped from rotating to a closed position for holding the second-stage containers a, a placed on the lift conveyor 25 in an intermediate position in a horizontal posture, and an open position for releasing the holding and fixing. To do. In addition, the guide plates 33, 33 are erected on both side edges of the container groups A, A horizontally held by the holding arms 31, respectively, and the container groups A are held in the front row on the shipping side. A guide plate 34 is erected in contact with the front edge portion.

The illustrated embodiment is configured as described above, and as an example of the number of shipping stages by the case shipping device 1, for example, a container a containing a product (not shown) is stacked in five stages. The unloading operation at that time will be described. First, as shown in FIGS. 1 and 2, the pressing plates 17, 17 of the unloading vehicle 3 standing by at the unloading position on the conveyor 2 are opened, and a pallet in which 50 containers a are stacked is stacked. After P (see FIG. 7) is placed on the transport conveyor 2, the transport conveyor 2 is rotationally driven in the feed direction, and the pallet P on which 50 containers a are stacked is placed on the transport conveyor 2. The container groups A, A stacked at the front end of the pallet P on the feed side are brought into contact with the alignment plate 13 standing on the pallet unloading side at the same position. At the same time, the pressing plates 17, 17 of the unloading vehicle 3 standing by at the unloading position are rotated in the closing direction, and these pressing plates 17, 17 are put into the container groups A, A stacked at the rear end of the pallet P on the feed side. The container groups A ... Stacked on the pallet P by pressing are pressed toward the aligning plate 13 side to correct them in the shipping direction.

Next, as shown in FIG. 3, the case unloader 4 of the unloading vehicle 3 is driven to unload the container groups A, A in the first row stacked at the feed-side rear end of the pallet P. The pusher 21 moves the container group A, A in the first row in the loading direction, and transfers the container group A, A in the first row onto the elevator conveyor 25 of the case separator 5. At the same time, as shown in FIG. 4, the holding arms 31 and 31 are respectively locked to the containers a and a on the second stage from the bottom placed on the elevator conveyor 25, and the remaining container groups A and A are retained. Hold in a horizontal position. After that, as shown in FIG. 5, the elevator conveyor 25 is lowered to the lower position to separate the containers a and a stacked in the lowermost stage, and the elevator conveyor 25 is rotationally driven in the loading direction to separate the containers. The containers a, a thus prepared are sequentially transferred onto the feeding conveyor 30, and the feeding conveyor 30 is rotationally driven in the carrying direction to carry and supply the containers a, a to a sorting step (not shown).

Next, as shown in FIG. 6, when the elevating conveyor 25 is raised to the upper position and the remaining container groups A and A held by the holding arms 31 and 31 are placed on the elevating conveyor 25. At the same time, the holding and fixing by these holding arms 31, 31 is released. After that, the elevating conveyor 25 is lowered to the middle stage position, and in the same manner as described above, the holding arms 31, 31 hold the second-stage containers a, a placed on the elevating conveyor 25, and After the elevating conveyor 25 is lowered to the lower position to separate the containers a and a, the separated containers a and a are sequentially transferred onto the feeding conveyor 30 and conveyed and supplied to a sorting step (not shown). In the same manner, the remaining container groups A and A held by the above-mentioned holding arms 31 and 31 are sequentially separated from the lower side.

After the separation operation of the container groups A, A in the first row is completed or before the completion of the separation operation, the shipping pusher 21 of the case loader 4 is returned to the retracted position and the separation operation is completed. The elevating conveyor 25 is stopped up and down at an intermediate position which is horizontal to the pallet P transported to the unloading position of the transporting conveyor 2, and the holding arms 31, 31 pivotally supported on both upper side portions are stopped at the open position.

After that, the loading vehicle 3 is moved by one pitch for loading the container groups A and A for one row, and the container group A in the second row stacked on the rear end of the pallet P on the feed side. , A to which the pressing plates 17, 17 are brought in close proximity or in pressure contact with each other to correct the direction in the shipping direction and then unloaded, and in the same manner as described above, the container groups A, A in the second row are sequentially separated from the lower stage side and separated. The containers a and a thus prepared are sequentially transferred onto the feed conveyor 30 and are conveyed and supplied to the sorting process (not shown). Similarly, in the same manner, the unloading car 3 is sequentially moved by one pitch for unloading the container groups A, A for one row, and the third, fourth, and fifth rows of containers stacked on the pallet P are stacked. The pressing plates 17 and 17 are brought into close contact or pressure contact with the groups A and A to adjust the orientation in the shipping direction, and then the containers are sequentially unloaded, and the container groups A and A in each row are sequentially separated from the lower stage side. The transfer is sequentially performed on the transfer conveyor 30.

Next, after the loading / unloading operation of all the containers a ... Stacked on one pallet P is completed, as shown in FIG. 1, the conveyor 2 for transportation is rotationally driven in the feeding direction to convey the same. The empty pallets P placed on 2 are conveyed and supplied to a pallet stacking machine (not shown) connected to the end portion on the sending side, and stacked and collected. On the other hand, after the pressing plates 17, 17 of the unloading car 3 are rotated to the open position and moved to the initial position, the next pallet P on which 50 containers a are stacked is moved to the unloading position. It is conveyed and supplied, and in the same manner as described above, the pressing plates 17 and 17 are brought close to or in pressure contact with the container groups A and A in the first to fifth rows stacked on the pallet P, and the orientation is corrected in the shipping direction. Then, the containers are sequentially unloaded one by one, the container groups A, A are sequentially separated from the lower stage side, and the separated containers a, a are sequentially transferred onto the feeding conveyor 30 to perform a sorting step (not shown). Transport to.

Since the orientation of each container group A ... Stacked on the pallet P is corrected in the shipping direction by the aligning plate 13 and the pressing plates 17 and 17 as described above, the containers are sequentially unloaded one by one. The mechanical work for successively unloading the container groups A stacked on P can be smoothly performed, and the labor and efficiency of the unloading work can be improved. Moreover, since the container groups A stacked on the pallet P are successively unloaded while the alignment plate 13 and the pressing plates 17, 17 are regulated in the shipping direction, the container groups A are unloaded during the unloading operation. Can be positively prevented from displacing, the loading and unloading work of the container group A can be performed smoothly, and the labor and work to artificially correct the direction of the container group A stacked in multiple stages as in the conventional example. The number of workers and time required for the work can be significantly reduced.

FIG. 8 shows a case separator 5 of the second embodiment used for sequentially separating the cardboard boxes b stacked in five stages from the lower side. Holding members 35 1, 35 made of synthetic rubber or the like are fixed to the lower ends of the constituting holding arms 31, 31 and mounted on the elevating conveyer 25 at the middle position on the boxes b, b of the second from the bottom. The holding members 35, 35 are pressed against each other to hold the remaining group of boxes B, B in a horizontal posture by mutual surface resistance. That is, as shown in FIG. 9, the pallets P on which 50 box bodies b are stacked are transported to the unloading position on the transporting conveyor 2, and are placed at the same position as the alignment plate 13 installed vertically in the same position. The direction of each container group A ... Stacked on the pallet P is corrected to the shipping direction by the pressing plates 17, 17 of the waiting loading vehicle 3. Then, the case unloading machine 4 is driven to sequentially unload the box groups B and B in each row stacked on the pallet P, and the case separator 5 is driven to form the box groups B 1 and B 2 for one row. Since they are sequentially separated from the lower stage side, the mechanical work for successively unloading the group of boxes B stacked on the pallet P can be smoothly performed.

Further, an L-shaped holding plate (not shown) or an adsorbent (not shown) is attached to the lower ends of the holding arms 31 and 31 described above, and the two stages from the bottom placed on the elevator conveyor 25. The eye boxes b, b may be held horizontally.

In the correspondence between the configuration of the present invention and the above-described embodiment, the case group of the present invention corresponds to the container group A and the box group B of the embodiment, and similarly, the case loading / unloading means is the same. It corresponds to the unloading car 3, the case unloading machine 4, the unloading pusher 21, and the unloading cylinder 24, but the present invention is not limited to the configuration of the above-described embodiment.

In the above-described embodiment, the container group A for one row and the container group A for each row stacked on the pallet P are moved by moving the unloading car 3 by one pitch for unloading A. A is configured to be unloaded one by one. For example, the conveyor 2 for transportation is intermittently fed by one pitch for loading and unloading one group of container groups A and A, and one row of five rows is stacked. The container groups A, A may be sequentially unloaded from the pallet P.

[Brief description of drawings]

FIG. 1 is a plan view showing a case shipping device according to a first embodiment.

FIG. 2 is a side view of a case shipping device.

FIG. 3 is a side view showing a container unloading operation of the case unloading machine.

FIG. 4 is a front view on the shipping side showing the container holding operation of the case separator.

FIG. 5 is a shipping side front view showing the container separating operation of the case separator.

FIG. 6 is a shipping side front view showing the container lowering operation of the case separator.

FIG. 7 is a perspective view showing a stacked state of the containers.

FIG. 8 is a front view on the shipping side showing a box holding operation by the case separator of the second embodiment.

FIG. 9 is a perspective view showing a stacked state of boxes.

[Explanation of symbols]

 a ... container A ... container group b ... box body B ... box group 1 ... case unloading device 2 ... transporting conveyor 3 ... loading car 4 ... case unloading machine 5 ... case separating machine 13 ... alignment plate 17 ... pressing plate 21 ... shipping Pusher 25 ... Elevating conveyor 30 ... Feeding conveyor 31 ... Holding arm

Claims (1)

[Scope of utility model registration request] 1. A pallet is transported to a loading / unloading position set on a transporting conveyor, and a case unloading means disposed on the transporting conveyor is moved to a position corresponding to a case group stacked on the pallet. And a case unloading device for sequentially unloading the group of cases stacked on the pallet one by one, which is stacked on the pallet on one side of the pallet conveyed to the unloading position of the transport conveyor. An alignment plate is erected to face the case group, and a pressing plate for pressing the case group stacked on the pallet to the alignment plate side is provided on the other side of the pallet transported to the unloading position of the transport conveyor. A case unloading device equipped with case unloading means.