JP2020070136A5 - - Google Patents

Description

Product stock equipment

The present invention relates to a product stocking apparatus which is arranged adjacent to a manufacturing apparatus and stores one or more products taken out from the manufacturing apparatus by a product unloading machine in a pallet and temporarily stocks them.

According to Japanese Patent Application Laid-Open No. 2017-71468 (Patent Document 1), an empty pallet stacking group in which a plurality of empty pallets are laminated is transported from a carry-in position to a standby position for storing a product in the empty pallet, and is in the standby position. A loading mechanism that transports one empty pallet from the empty pallet stacking group to a storage position adjacent to the standby position, and a stored pallet in which one or more products taken out by the product unloader are stored in the empty pallet at the storage position. However, in the main frame, there is a lift mechanism that transports a plurality of stacked storage pallet stacks to the carry-out transport start position below the storage position, and a carry-out mechanism that carries out the storage pallet stacks from the carry-out transport start position to the carry-out position. An example of a conventional product stocking apparatus provided with a main stock unit in preparation for the above is disclosed.

JP-A-2017-71468

The product stocking device described in Patent Document 1 is manufactured as a dedicated product when a pallet having a specific size is used. Therefore, conventionally, it has been necessary to prepare a product stock device for each pallet having different dimensions.

An object of the present invention is to provide a product stocking device capable of stocking products even when pallets having different dimensions are used.

The present invention is an object of improvement of a product stocking device which is arranged adjacent to a manufacturing device and for storing one or more products taken out from the manufacturing device by a product unloading machine in a pallet and temporarily stocking them. To do. The product stock device of the present invention includes a main stock unit including a carry-in mechanism, a lift mechanism, and a carry-out mechanism in the main frame. The carry-in mechanism transports an empty pallet stacking group in which a plurality of empty pallets are stacked from the carry-in position to a standby position for storing products in the empty pallets, and waits for one empty pallet from the empty pallet stacking group in the standby position. Transport to the storage position adjacent to. The lift mechanism carries out a storage pallet stacking group in which a plurality of stored pallets in which one or more products taken out by a molded product take-out machine are stored in an empty pallet in the storage position are stacked below the storage position. Transport to the transport start position. Then, the carry-out mechanism carries out the storage pallet laminated group from the carry-out transport start position to the carry-out position.

In the present invention, in particular, the carry-in mechanism is configured by a carry-in conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction. Further, the unloading mechanism is composed of a unloading conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction. The carry-in conveyor and the carry-out conveyor are configured so that the dimensions of the distance between the pair of conveyor belt mechanisms in the width direction can be changed. According to the present invention, when stocking pallets having different width dimensions, the dimension of the interval in the width direction of each pair of conveyor belt mechanisms of the carry-in conveyor and the carry-out conveyor is set to the width dimension of the pallet to be stocked. By changing and adjusting according to it, pallets with different width dimensions can be stocked. Therefore, it is not necessary to prepare a product stock device for each pallet having different dimensions as in the conventional case.

One of the pair of conveyor belt mechanisms may be movable in the width direction, or both of the pair of conveyor belt mechanisms may be movable in the width direction.

The main frame is preferably composed of a pair of side frames located in the width direction and a plurality of connecting frames whose ends are connected to the pair of side frames via a connecting structure. By adopting such a structure, even if the width dimension of the main frame is different, the pair of side frames can share the same structure, so that the manufacturing cost can be reduced. Side frames per pair, such is preferably an integral, respectively.

The plurality connecting frames constituting the main frame, a plurality of support for connecting frame for connecting a pair of side frames in the upper region of the pair of side frames to support the loading mechanism, supporting the delivery mechanism Therefore, it is preferable that a plurality of supporting connecting frames for connecting the pair of side frames are included in the lower region below the upper region of the pair of side frames. When such a structure is adopted, the width dimension of the main frame can be easily changed by changing the length of the supporting connecting frame.

The mechanism for adjusting the position of the pair of conveyor belt mechanisms is arbitrary. For example, a slide mechanism that slidably supports a pair of conveyor belt mechanisms in the width direction along a plurality of supporting connecting frames, and a fixing means for fixing the pair of conveyor belt mechanisms to the plurality of supporting connecting frames. A positioning structure for positioning by the above may be provided for a plurality of supporting connecting frames. By moving the conveyor belt mechanism along the slide mechanism, the width direction dimension of the pair of conveyor belt mechanisms is adjusted, and then the conveyor belt mechanism is fixed by the fixing means. Can be easily adjusted to the width direction dimension of the pallet.

The rest of the lift-up mechanism that lifts up the remaining empty pallet stacks in the standby position to enable transport of one empty pallet when transporting one empty pallet from the empty pallet stack to the storage position in the standby position. The engagement structure that engages with the empty pallets at the bottom of the empty pallet stacks lifts up the remaining empty pallet stacks in response to dimensional changes in the widthwise spacing of the pair of conveyor belt mechanisms of the carry-in mechanism. The structure can be changed so that it can be changed. As a result, the lift-up mechanism can be easily adjusted to pallets having different dimensions in the width direction.

The engagement structure has a plurality of claws that engage with the empty pallet at the bottom, and if the multiple claws can be replaced, the lift-up mechanism also replaces the claws with pallets having different dimensions in the width direction. It can be easily adjusted by work.

The engaging structure has a plurality of claws that engage with the empty pallet at the bottom, and the engaging structure may be configured such that the lengths of the plurality of claws can be changed. For example, the length can be changed by supporting the claw portion so as to be slidable.

The engaging structure may be configured so that the positions of the plurality of claws can be changed in the transport direction of the empty pallet. In this way, the empty pallet stacking group can be lifted up by the claws at appropriate positions according to the difference in the center of gravity of the pallets.

Also the extension loading mechanism for supplying empty pallet in loading position from the extension loading position is arranged in series with the loading mechanism, accommodated pallets stacked group from the carry-out position are arranged in series with the delivery mechanism to the extended unloading position An extension stock unit may be further provided in which the carry-in / carry-out combined mechanism constituting the extension carry-out mechanism is provided in the extension frame. In this case, the extension stock unit is further provided with a lift mechanism that moves up and down between the extension carry-out position and the extension carry-in position to raise or lower the carry-in / carry-out combined mechanism between the extension carry-out position and the extension carry-in position. The carry-in / carry-out combined mechanism is composed of a carry-in / carry-out combined conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction. The carry-in / carry-out combined conveyor is configured so that the dimension of the interval in the width direction of the pair of conveyor belt mechanisms can be changed. Therefore, even if an extension stock unit is used, it is possible to cope with a change in the type of pallet.
It should be noted that one of the pair of conveyor belt mechanisms of the carry-in / carry-out mechanism may be movable in the width direction, and both of the pair of conveyor belt mechanisms may be movable in the width direction.

It is a perspective view which shows the whole structure of the product stock apparatus of one Embodiment of this invention. It is a perspective view which shows the embodiment of FIG. 1 excluding the exterior. It is a front view which shows the embodiment of FIG. 1 excluding the exterior. It is a right side view which shows the embodiment of FIG. 1 excluding the exterior. It is a top view which shows the embodiment of FIG. 1 excluding the exterior. It is an enlarged perspective view which shows only the carry-in conveyor part in the embodiment of FIG. It is a top view of the conveyor part of FIG. It is a bottom view of the conveyor part of FIG. FIG. 5 is a plan view showing two examples (A) and (B) of replaceable claws included in the lift-up mechanism according to the embodiment of FIG. It is a figure used for demonstrating another example of the engagement structure included in a lift-up mechanism. (A) and (B) are diagrams for showing another example of an engaging structure in which claws having different lengths can be realized by changing the mounting posture.

An embodiment of the product stocking apparatus of the present invention will be described in detail with reference to the following drawings.

FIG. 1 is a perspective view showing the overall configuration of the product stock device 1 of one embodiment. 2 to 5 are a perspective view, a front view, a right side view, and a plan view showing a state in which the exterior is removed in the embodiment of FIG. 1, respectively. Note that FIG. 2 shows the loaded state of the pallets during actual operation, but in other figures, one pallet is shown at an appropriate place for the purpose of showing the flow of the pallets.

The product stock device 1 of the present embodiment is arranged adjacent to a resin molding machine (manufacturing device) (not shown), and one or more moldings taken out from the resin molding machine by a molded product take-out machine (not shown). It is used for the purpose of storing the product in the empty pallet 9 at the storage position P3 and temporarily stocking the product. The product stock device 1 of the present embodiment includes a main stock unit 3 and an extension stock unit 5 as a basic configuration.

As shown in FIGS. 2 and 3, the main stock unit 3 includes a carry-in mechanism 13, a lift mechanism 21, and a carry-out mechanism 23 in the main frame 4.

The carry-in mechanism 13 conveys the empty pallet stacking group 11 in which a plurality of empty plastic pallets 9 are laminated from the carry-in position P1 to the standby position P2 immediately before storing the product in the empty pallet 9, and is at the standby position P2. One empty pallet 9 is transported from the empty pallet stacking group 11 to the storage position P3 adjacent to the standby position P2.

The empty pallet stacking group 11 is composed of eight empty pallets 9 shown above the extension stock unit 5 in each figure, but the empty pallet stacking group 11 when moving from the carry-in position P1 to the standby position P2 is , Different numbers of empty pallets may be laminated.

The lift mechanism 21 stores a storage pallet stacking group 11'in which a plurality of stored pallets in which one or more products taken out by a product take-out machine are stored in an empty pallet 9 at the storage position P3 are stored in the storage position P3. Transport to the carry-out transport start position P4 below.

The carry-out mechanism 23 carries out the storage pallet stacking group 11'from the carry-out transport start position P4 to the carry-out position P5. The unloading mechanism 23 is composed of a unloading conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction.

The lift-up mechanism 29 for transferring the empty pallets 9 from the empty pallet stacking group 11 in the standby position P2 to the storage position P3 one by one is a storage position for one empty pallet 9 from the empty pallet stacking group 11 in the standby position P2. When transporting to P3, the remaining empty pallet stacking group 11 is lifted up at the standby position P2 so that one empty pallet 9 can be transported. The lift-up mechanism 29 is a pair of two pallets protruding from both sides in the transfer direction of the empty pallets 9 toward the other as an engaging structure that engages with the empty pallets 9 at the bottom of the remaining empty pallet stacking group 11. Has claws 31, 31 of the pallet. In FIGS. 1 and 2, in order to show the presence of the claw portions 31, 31, the pair of claw portions 31, 31 on the front side are raised to the uppermost position. The pair of claws 31, 31 on the back side are in proper positions. That is, in order to actually lift up, it is inserted and arranged under the flange portion of the bottom empty pallet 9 of the remaining empty pallet stacking group 11 on the one empty pallet 9 at the bottom of the empty pallet stacking group 11. ing. Therefore, in FIGS. 1 and 2, the pair of claw portions 31, 31 on the back side cannot be seen.

The pair of claws 31, 31 on the front side and the back side are brought apart from each other in synchronization with each other to form a part of the flange portion of the empty pallet 9 at the bottom of the remaining empty pallet stacking group 11. It can be engaged and disengaged, and can be raised and lowered synchronously. Therefore, a pair of claw portions 31, 31 engage with the flange portion of the second empty pallet 9 from the bottom of the empty pallet stacking group 11, leaving the bottom empty pallet 9 and the empty pallet stacking group 11. Lift up. In this state, the carry-in mechanism 13 described later is operated to transfer only the lowermost empty pallet 9, and when the lowermost empty pallet 9 moves, the pair of claws 31 and 31 of the set are processed and the remaining empty. The pallet stacking group 11 is returned to the original standby position P2. The lowermost empty pallet 9 is conveyed to the storage position P3 side of the remaining empty pallet stacking group 11 by a pair of conveyor belt mechanisms 34 and 36 described later, and then is stored by the transfer slider 14 shown in FIGS. 2 and 5. It is transported to position P3. The transport slider 14 engages with the bottom of the empty pallet 9 to transport the empty pallet 9 to the storage position P3 when sliding in the transport direction. After that, the transport slider 14 disengages from the empty pallet 9 and returns to the original position. After that, this operation is repeated until all the empty pallets 9 included in the empty pallet stacking group 11 are conveyed to the storage position P3.

As shown in FIGS. 5 to 7, in the present embodiment, the carry-in mechanism 13 is composed of a carry-in conveyor 17 provided with a pair of conveyor belt mechanisms 34 and 36 arranged at intervals in the width direction. Further, the unloading mechanism 23 is composed of a unloading conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction. Since the carry-in mechanism 13 and the carry-out mechanism 23 have the same basic configuration, the carry-in mechanism 13 will be described in detail here as a representative example, and the description of the carry-out mechanism 23 will be omitted. In particular, in the present embodiment , the carry-in conveyor 17 and the carry-out conveyor are characterized in that the dimensions of the spacing in the width direction of the pair of conveyor belt mechanisms 34 and 36 can be changed, respectively. This feature makes it possible to handle pallets with different dimensions in the width direction.

As shown in FIGS. 2 and 5, in the present embodiment, the main frame 4 is connected to a pair of side frames 67, 67 located in the width direction and a pair of side frames 67, 67 at both ends. It is composed of a plurality of supporting connecting frames 69 and 71, which are respectively connected via the above. By adopting such a structure, even if the width dimension of the main frame 4 is different, the pair of side frames 67, 67 can share the same structure by changing the length of the supporting connecting frame. The cost can be reduced. In the present embodiment, the pair of side frames 67 and 67 are integrally formed by welding, respectively.

In the present embodiment, the plurality of supporting connecting frames 69 constituting the main frame 4 have the pair of side frames 67, in the upper region of the pair of side frames 67, 67 for supporting the carry-in mechanism 13. In addition to the plurality of supporting connecting frames 69'that connect the 67, as shown in FIG. 2, below the upper region of the pair of side frames 67, 67 for supporting the carrying-out mechanism 23. A plurality of supporting connecting frames 71'that connect a pair of side frames 67, 67 in the lower region of the above are included. When such a structure is adopted, the width dimension of the main frame 4 can be easily changed by changing the lengths of the supporting connecting frames 69, 69'and 71, 71'.

The mechanism for adjusting the positions of the pair of conveyor belt mechanisms 34 and 36 is arbitrary, but in the present embodiment, the pair of conveyor belt mechanisms 34 and 36 are arranged along a plurality of supporting connecting frames 69'and 71'. A positioning structure for positioning by a slide mechanism that slidably supports in the width direction and a fixing means that fixes a pair of conveyor belt mechanisms to a plurality of support connecting frames 69'and 71' is connected to a plurality of supports. It is provided for frames 69 and 71. By moving the conveyor belt mechanism along the slide mechanism, the width direction dimension of the pair of conveyor belt mechanisms is adjusted, and then the conveyor belt mechanism is fixed by the fixing means. Can be easily adjusted to the width direction dimension of the pallet.

As shown in FIGS. 6 to 8, the carry-in mechanism 13 of the present embodiment includes a carry-in drive source 15 including an electric motor and a pair of conveyor belt mechanisms 34 and 36 driven by the carry-in drive source 15. It is equipped with a conveyor 17. The carry-in conveyor 17 is arranged at intervals in the width direction, and has a structure in which a pair of conveyor belts 35, 37 of a pair of conveyor belt mechanisms 34, 36 are arranged in parallel. The pair of conveyor belts 35 and 37 are bridged between the pair of drive pulleys 39 and 41 located on the upstream carry-in position P1 side and the pair of driven pulleys 43 and 45 located on the downstream storage position P3 side, respectively. The pair of conveyor belts 35 and 37 can be driven by rotating the pair of drive pulleys 39 and 41 via the drive shaft 47 driven by the carry-in drive source 15.

The size of the interval in the width direction of the pair of conveyor belt mechanisms 34, 36 including the pair of conveyor belts 35, 37, the pair of drive pulleys 39, 41, the pair of driven pulleys 43, 45, etc. can be changed. That is, the drive pulley 39 and the driven pulley 43 are rotatably attached to the first conveyor frame 49 to form one conveyor belt mechanism 34, and the drive pulley 41 and the driven pulley 45 are rotatably attached to the second conveyor frame 51. It is attached to the other conveyor belt mechanism 36. The first conveyor frame 49 and the second conveyor frame 51 are fixed to the slide type fixtures 53 and 55 and the slide type fixtures 57 and 59, respectively. Below the first conveyor frame 49 and the second conveyor frame 51, a pair of guide rails 61 constituting a supporting connecting frame 69'in which both ends are connected to a pair of side frames 67, 67 via a connecting structure, respectively. , 63 are arranged near both ends of the carry-in conveyor 17 at intervals in the transport direction. The slide-type fixtures 53 and 57 are slidably attached to the guide rail 61, and the slide-type fixtures 55 and 59 are slidably attached to the guide rail 63, respectively.

Each slide type fixture 53 to 59 is provided with a fixing screw 65 as a fixing means for the pair of conveyor belt mechanisms 34 and 36, respectively. By moving the conveyor belt mechanism along the slide mechanism including the guides 53 to 59 and the guide rails 61 and 63, the widthwise dimensions of the pair of conveyor belt mechanisms are adjusted, and then the fixing screws 65 are guided to each guide. The conveyor belt mechanism can be fixed to the guide rails 61 and 73 by screwing them into a plurality of adjusting screw holes provided in advance on the rails 61 and 63. By removing the fixing screws 65 from the screw holes of the guide rails 61 and 63, the conveyor belt mechanism can be made slidable. Further, the drive shaft 47 is a ball spline, and the drive pulleys 39 and 41 are configured to be slidable along the axis of the drive shaft 47. In the present embodiment, the carry-in drive source 15 is fixed to the guide rail 61.

Therefore, in the first conveyor frame 49 and the second conveyor frame 51, the dimension of the mutual spacing in the width direction can be changed, and therefore the dimension of the spacing between the pair of conveyor belt mechanisms can be adjusted according to the width dimension of the pallet. is there.

The carry-out mechanism 23 also has the same configuration as the carry-in mechanism 13, and includes a carry-out conveyor in which the dimension of the interval in the width direction of the pair of conveyor belt mechanisms can be changed.

In the present embodiment, both the first conveyor frame 49 and the second conveyor frame 51 are movable in the width direction, but in other embodiments, only one may be movable in the width direction.

The extension stock unit 5 in the present embodiment is arranged in series with the carry-in mechanism 13 of the main stock unit 3 and supplies an empty pallet stacking group from the extension carry-in position P6 to the carry-in position P1 and an extension carry-in mechanism and a carry-out mechanism. It is provided with a carry-in / carry-out combined mechanism 81 which is arranged in series with respect to 23 and constitutes both an extension carry-out mechanism for carrying out the storage pallet stacking group from the carry-out position P5 to the extension carry-out position P7. The carry-in / carry-out combined mechanism 81 is raised or lowered between the extended carry-out position P7 and the extended carry-in position P6 by the lift mechanism 83 further provided in the extension stock unit 5.

The carry-in / carry-out combined mechanism 81 has the same configuration as the carry-in mechanism 13, that is, it is composed of a carry-in / carry-out combined conveyor 85 provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction, and is used for both carry-in / carry-out. The conveyor 85 is configured so that the dimension of the interval in the width direction of the pair of conveyor belt mechanisms can be changed. Therefore, even if the extension stock unit 5 is used, it is possible to cope with the change of the pallet type.

As with the carry-in mechanism 13, both of the pair of conveyor belt mechanisms of the carry-in / carry-out combined mechanism 81 can move in the width direction, but in other embodiments, only one of them can move in the width direction.

9 (A) and 9 (B) are a pair of claws 31 and 31 of the lift-up mechanism 29 according to the present embodiment, and a pair of claws 31 and 31 corresponding to pallets having smaller dimensions in the width direction, respectively. The replacement claws 73 and 73 are shown. As is clear from FIG. 9, the replacement claw portions 73, 73 extend longer than the claw portions 31, 31. Therefore, it is possible to engage a pallet having a smaller width dimension by exchanging the pallet according to the width dimension. In the present embodiment, the remaining empty pallet stacking group 11 can be lifted up in response to the dimensional change of the interval in the width direction of the pair of conveyor belt mechanisms of the carry-in mechanism 13. As a result, the lift-up mechanism 29 can be easily adjusted to pallets having different dimensions in the width direction.

FIG. 10 shows another example of the engagement structure. In this engaging structure, the lengths and positions of the two claws 75, 75 that engage with the empty pallet at the bottom can be changed, respectively. Therefore, an elongated groove 75A extending in the longitudinal direction of the claw portion is formed in the two claw portions 75, 75, and a groove 76A extending in a direction orthogonal to the groove 75A is formed in the fixed portion 76 for fixing the claw portion. .. The claw portions 75, 75 are fixed to the fixed portion 76 by screwing a nut into a bolt 77 penetrating the groove 75A and the groove 76A. In this engaging structure, the effective dimensions and positions of the two claw portions 75, 75 can be adjusted by adjusting the positional relationship between the groove 75A and the groove 76A. In particular, according to this engaging structure, the positions of a plurality of claws can be changed in the transport direction of the empty pallet, so that the empty pallets are laminated by the claws at appropriate positions according to the difference in the center of gravity of the pallets. You can lift up the flock.

11 (A) and 11 (B) are diagrams for explaining an example of another engaging structure.

In this structure, L-shaped claws are used as the claws 78 and 78. Grooves 78B and 78D are formed in both arms 78A and 78C of the L-shaped claw portion, respectively. Then, the bolts 81 erected on the fixed portion 80 are fitted into the grooves 78B or 78D, and the arms 78A and 78C are fixed to the fixed portion 80 by tightening the nuts on the bolts. FIG. 11A shows a case where the long arm portion 78A is used as the engaging claw portion, and FIG. 1B shows a case where the short arm portion 78C is used as the claw portion. By using this engaging structure, the length and position of the claw portion can be changed by changing the mounting posture of the claw portion.

As described above, according to the product stock device according to the present embodiment, the carry-in mechanism 13 and the carry-out mechanism 23 for transporting the empty pallet 9 or the storage pallet have a pair of conveyor belt mechanisms arranged at intervals in the width direction. It is composed of a carry-in conveyor 17 and a carry-out conveyor, and the pair of conveyor belt mechanisms can be used to stock products even when pallets with different dimensions are used because the dimensions of the spacing in the width direction can be changed. It is possible.

According to the product stocking apparatus of the present invention, products can be stocked even when pallets having different dimensions are used. Therefore, it is not necessary to prepare a product stock device for each pallet having different dimensions as in the conventional case.

1 Product stock device 3 Main stock unit 4 Main frame 5 Extension stock unit 9 Empty pallet 11 Empty pallet stacking group 11'Storage pallet stacking group 13 Carry-in mechanism 15 Carry-in drive source 17 Carry-in conveyor 21 Lift mechanism 23 Carry-out mechanism 29 Lift-up mechanism 31 Claws 34,36 Conveyor belt mechanism 35,37 Conveyor belt 39,41 Drive pulley 43,45 Driven pulley 49 First conveyor frame 51 Second conveyor frame 53,55,57,59 Slide type fixture 61,63 Guide rail 65 Fixing screw 67 Side frame 69,71 Supporting connection frame 69', 71' Supporting connection frame 73 Replacement claw part 75,78 Claw part 81 Carry-in / carry-out combined mechanism 83 Lift mechanism 85 Carry-in / carry-out combined conveyor P1 Carry-in position P2 Standby position P3 Storage position P4 Carry-out transfer start position P5 Carry-out position P6 Extended carry-in position P7 Extended carry-out position

Claims (14)

Arranged adjacent to the manufacturing equipment, one or more products taken out from the manufacturing equipment by the product unloading machine are stored in a pallet and temporarily stocked.
An empty pallet stacking group in which a plurality of empty pallets are stacked is transported from a carry-in position to a standby position for storing a product in the empty pallet, and one empty pallet is placed on standby from the empty pallet stacking group in the standby position. A carry-in mechanism that transports to a storage position adjacent to the position,
A storage pallet stacking group in which a plurality of stored pallets in which one or more products taken out by the product take-out machine are stored in the empty pallet in the storage position is carried out below the storage position. A lift mechanism that transports to the transport start position and
A product stock device including a main stock unit having a carry-out mechanism in the main frame for carrying out the storage pallet laminated group from the carry-out transport start position to the carry-out position.
The carry-in mechanism is composed of a carry-in conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction.
The unloading mechanism is composed of a unloading conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction.
The carry-in conveyor and the carry-out conveyor are product stock devices, each of which is configured such that the dimension of the interval in the width direction of the pair of conveyor belt mechanisms can be changed. The product stocking device according to claim 1, wherein one of the pair of conveyor belt mechanisms is movable in the width direction. The product stocking device according to claim 1, wherein both of the pair of conveyor belt mechanisms are movable in the width direction. The main frame is composed of a pair of side frames located in the width direction and a plurality of connecting frames whose ends are respectively connected to the pair of side frames via a connecting structure. The product stocking apparatus according to any one of 3. The product stocking device according to claim 4, wherein the pair of side frames are integrated with each other. The plurality of connecting frames
A plurality of supporting connecting frames for connecting the pair of side frames in the upper region of the pair of side frames to support the carry-in mechanism.
4. Claim 4 including a plurality of supporting connecting frames for connecting the pair of side frames in a lower region below the upper region of the pair of side frames in order to support the carrying-out mechanism. Or the product stocking apparatus according to 5. A slide mechanism that slidably supports the pair of conveyor belt mechanisms in the width direction along the plurality of supporting connecting frames, and the pair of conveyor belt mechanisms for the plurality of supporting connecting frames. The product stock device according to claim 6, wherein a positioning structure for positioning by a fixing means for fixing is provided for the plurality of supporting connecting frames. When one empty pallet is transported from the empty pallet stacking group to the storage position at the standby position, the remaining empty pallet stacking group is lifted at the standby position so that the one empty pallet can be transported. The engaging structure that engages with the empty pallet at the bottom of the remaining empty pallet stacking group of the lift-up mechanism corresponds to the dimension change of the interval in the width direction of the pair of conveyor belt mechanisms of the carry-in mechanism. The product stocking apparatus according to claim 1, wherein the structure can be changed so that the remaining empty pallet laminated group can be lifted up. The engaging structure has a plurality of claws that engage the empty pallet at the bottom.
The product stocking apparatus according to claim 8, wherein the plurality of claws are replaceable. The engaging structure has a plurality of claws that engage the empty pallet at the bottom.
The product stocking device according to claim 8, wherein the engaging structure is configured so that the lengths of the plurality of claws can be changed. The product stocking device according to claim 10, wherein the engaging structure is configured so that the positions of the plurality of claws can be changed in the transport direction of the empty pallet. An extension loading mechanism for supplying the empty pallets to said loading position from the extension loading position is arranged in series with the carry mechanism, to the extended unloading position from the unloading position are arranged in series with the discharge mechanism An extension stock unit is further provided, which includes a carry-in / carry-out mechanism that constitutes an extension carry-out mechanism for carrying out the storage pallet laminated group in the extension frame.
The extension stock unit further includes a lift mechanism that moves up and down between the extension carry-out position and the extension carry-in position to raise or lower the carry-in / carry-out combined mechanism between the extension carry-out position and the extension carry-in position. Ori
The carry-in / carry-out combined mechanism is composed of a carry-in / carry-out combined conveyor provided with a pair of conveyor belt mechanisms arranged at intervals in the width direction.
The product stock device according to any one of claims 1 to 10, wherein the carry-in / carry-out combined conveyor is configured such that the dimension of the interval in the width direction of the pair of conveyor belt mechanisms can be changed. .. The product stocking device according to claim 12, wherein one of the pair of conveyor belt mechanisms is movable in the width direction. The product stocking apparatus according to claim 12, wherein both of the pair of conveyor belt mechanisms are movable in the width direction.