JPH07232827A - Stacker and stacker system - Google Patents

Abstract

PURPOSE:To improve safety without outward projection of a stacker when a table is moved by forming the table of a stacker capable of bending along its moving direction. CONSTITUTION:A traveling table 22 is adopted to be bendable along its traveling direction for bending and moving between the upper space 34a and the rear space 34b of a pallet supporting floor 40. A pallet 24 is mounted on the pallet supporting floor 40 and a load by one step is supplied on the traveling table 22 which becomes horizontal in the upper space 34a. Then, movement of the load 3 on the traveling table 22 is blocked by a stopper 46 and the load 3 falls downward and it is piled on the pallet 24 if the traveling table 22 is moved to the rear space 34b. Then, the traveling table 22 is returned on the pallet 24 again when the pallet 24 falls by one step. These actions are repeated so as to pile up the designated steps of the loads 3 on the pallet 24 and the loads 3 are carried out by a fork lift, etc., from an opening 25.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to stackers and stacker systems. Specifically, the present invention relates to a stacker and system for stacking loads on a load receiving portion such as a pallet.

[0002]

[Prior art]

(First Conventional Example) For example, books such as shrink-wrapped or kraft-wrapped books are aligned on a table, and then transferred onto a pallet under the table so that they are transferred in a plurality of stages on the pallet. Stackers are used to stack on.

FIGS. 19A to 19G are schematic sectional views showing a stacker K for palletizing which has been used conventionally and its operation. Reference numeral 101 in the figure is a table for aligning the loads 105 for one stage, and has a rigid structure of a single plate, which can be raised and lowered in the skeleton 102, and further moves in the horizontal direction to move the inside and outside of the skeleton 102. It is designed to go in and out of. Reference numeral 103 denotes a pallet on which a plurality of stages of loads 105 are placed, and the pallet 103 is placed in the lower part of the body 102. Reference numeral 104 denotes a carry-in portion (for example, an opening portion of the skeleton 102) for carrying the load 105 onto the table 101.

The operation of the stacker K is shown in FIG.
A description will be given according to (g). First, the table 101 is lifted to the height of the carry-in section 104, and the loads 105 for each row are sequentially carried into the table 101 through the carry-in section 104 (FIG. 19A). Loads for multiple rows on table 101
After arranging 05, the table 10 on which the load 105 is placed
1 descends near the pallet 103 (see FIG. 19).
(B)) Then, the table 101 horizontally moves toward the outside of the skeleton 102. At this time, load 1 on table 101
When the position of 05 is regulated by a stopper (not shown) so as not to move out of the frame 102 together with the table 101, the load 105 on the table 101 falls down and is transferred onto the pallet 103 (FIG. )). After this, the table 101 is returned to the inside of the frame 102 again, and the carrying-in section 1 again.
Ascends to the height of 04, and loads 105 for a plurality of rows are placed (FIG. 19D). Table 10 on which load 105 is placed
1 descends (FIG. 19 (e)), then moves horizontally toward the outside of the skeleton 102, drops the load 105 on the table 101 and stacks it on the load 105 on the pallet 103 (FIG. 19 (e)). f)). In this way, the pallet 10
When a plurality of stages of loads 105 have been stacked on top of 3 (Fig. 19
(G)), The pallet 103 on which the load 105 is placed is carried out of the skeleton 102 by a forklift or the like.

(Second Conventional Example) Further, a paper (large-sized base paper or the like) is placed on a table, and the paper is dropped on a pallet below the table to stack the paper high on the pallet. Stackers are also used for this purpose.
In a stacker for such a purpose, paper is generally supplied onto a table by manual work, so that the stacker is an open type in which the upper part of the table is opened without the box-shaped body. FIG. 21 is a schematic view showing an open type stacker L, and a table drive mechanism 113 for vertically moving and horizontally moving the table 112 is provided adjacent to a position where the pallet 111 is placed. Then, in FIG.
As shown in FIG.
Paper 114 on the table 112 with the table retracted
When the table 112 is placed, the table 112 is horizontally moved together with the paper 114 and is moved above the pallet 111, and the table 112 is retracted while only the paper 114 is constrained, the paper 114 on the table 112 is stacked on the pallet 111. To be Then, the table drive mechanism 113 raises the table 112 by the height of the paper 114 stacked on the pallet 111, and waits until the paper 114 is supplied onto the table 112.

[0006]

However, in the former stacker K having the above structure, when the load is transferred from the table to the pallet, the load is set by projecting the table out of the body. Since the table is pulled out from the middle of the pallet, the table unexpectedly pops out from the skeleton, and the table pops out at high speed, and the height at which the table pops out cannot be predicted, which is very dangerous for the worker.

Further, since the table pops out of the body, the area A in FIG. 20 needs to be a restricted area, for example, in order to ensure safety, and the occupied area and occupied space are smaller than the size of the palletizing stacker. It had the drawback of becoming large.

Further, even in the latter open type stacker, there is a problem that the total installation area is about twice the size of the table, the stacker becomes large and the installation area becomes large. In particular, when it is installed adjacent to a cutting machine, a small stacker with a small installation space is desired.

Further, in the open type stacker, since the exposed table is driven horizontally, there is a risk that the hem of clothes or the like may be accidentally caught on the table when working close to the stacker.

The present invention has been made in view of the above-mentioned drawbacks of the conventional examples, and an object thereof is to provide a stacker and a stacker system which have a small occupation area and a small space at the time of installation and have high safety. To provide.

[11]

The stacker of the present invention comprises:
By moving the table so that the load placed on the table located above the load receiving section remains above the load receiving section, the load on the table is dropped onto the load receiving section,
A stacker in which loads are stacked on the load receiving portion is characterized in that the table has a structure that can be bent along the moving direction.

For this purpose, for example, the table can be stored in the space around the load receiving portion. Alternatively, the table may be wound and stored. Alternatively, the table passes around above and below the load receiving section to circulate,
It is also possible that the table circulates above the load receiving portion.

In the above stacker, the height of the load receiving portion may be adjustable. Alternatively, the height of the table may be adjustable.

Air blowing means may be provided on the table.

Further, a sheet may be stretched on the upper surface of the table to reduce friction with a load. In that case, it is preferable to store the table and the sheet by separate storage means.

Further, in the stacker, the load holding device for gripping the end of the load placed on the table is rotatably supported and is held by rotating the load holding device. It is also possible to release the load.

The stacker system of the present invention is characterized by having the stacker and a load supply device for arranging loads to be supplied one by one on a table of the stacker.

[0018]

In the stacker and the stacker system of the present invention, since the table of the stacker has a structure that can be bent along the moving direction thereof, when the table on which the load is placed is moved from above the load receiving portion, By bending the table, for example, the table can be stored in the outer peripheral space, wound, or rotated. Therefore, unlike the conventional stacker, it is possible to prevent the table from protruding to the outside in the moving state of the table.

If the height of the load receiving portion or the table can be adjusted, the distance between the table and the upper surface of the load on the load receiving portion can be made as small as possible, so that the load receiving portion can be moved from the table to the load receiving portion. It is possible to reduce the drop distance of the load to and transfer the load smoothly.

If air is blown from the table, an air layer can be formed between the table and the load to make the load slip well.

Further, by tensioning the sheet on the upper surface of the table, friction with the load can be reduced, so that when the table is pulled out from the lower surface of the load, the table can be pulled out smoothly without being caught by the load. it can. In this case, the table and the seat can be smoothly stored by storing the table and the seat by separate storage means.

Further, by providing a load holding device for grasping the end of the load placed on the table, the load can be prevented from moving together with the table, and the load can be reliably dropped onto the load receiving portion. it can. Moreover, if the load holding unit is rotatably supported and the load held by rotating the load holding device is released, the load holding unit is moved horizontally to release the load. The load holding part can be made compact as compared with.

[0023]

1 is a front view showing a stacker system A for palletizing according to an embodiment of the present invention, and FIG. 2 is a schematic sectional view thereof. Reference numerals 1 and 2 denote a belt conveyor and a roller conveyor for conveying the loads 3 one by one, and a shrink wrapping machine or a kraft wrapping machine, for example, packs a plurality of books into a shrink wrapping or kraft wrapping package 3 and sends it. come. An attitude control unit 4 stands upright with two plates facing each other, the distance between the two plates is wide on the inlet side and narrow on the outlet side, and the width on the outlet side is the short side of the load 3. Adjusted to equal width. Therefore, the belt conveyor 1
The load 3 conveyed above is forcibly adjusted in its direction when passing through the posture control unit 4 (that is, the load 3 is oriented in such a direction that the transport direction and the longitudinal direction of the load 3 are parallel to each other). . Reference numeral 5 denotes a posture conversion unit, which can rotate the direction of the load 3 aligned by the posture control unit 4 by 90 degrees as necessary.

A stopper plate 6 is provided at the end of the roller conveyor 2 so that the load 3 conveyed in sequence can be obtained.
Stop against the stopper plate 6 and are arranged in a line on the roller conveyor 2. Reference numeral 7 denotes a space adjuster provided with a pair of insertion plates 8
Can move up and down, and can also move in the direction of the distance. When the loads 3 for one row are lined up on the roller conveyor 2, the insertion plate 8 is inserted between the loads 3 as necessary, and an appropriate space is opened between the loads 3 by moving in the interval direction. For example, the outer size of the load 3 for one row is adjusted to be constant.

The palletizing stacker B includes a lifter 10 for lifting the load 3 up to the height of the loading section 9.
Is attached integrally. In this lifter 10, on the left and right sides, a chain 15 is wound around a drive side sprocket 13 and a driven side sprocket 14 driven by a motor 12 via a shaft 11, and a guide rail 16 is used to lift and lower the table. Both ends of the lifting table 17 are supported so that they can be raised and lowered, and both ends of the lifting table 17 are connected to the chain 15. Therefore, by rotating the chain 15 with the motor 12, the elevating table 17 can be moved up and down between the height of the upper surface of the roller conveyor 2 and the height of the carry-in section 9. The lifter 10 is arranged adjacent to the roller conveyor 2. The lifting table 17 is lowered to the height of the upper surface of the roller conveyor 2, and when one row of the loads 3 is lined up on the roller conveyor 2, the plate 19 of the extruder 18 moves in the width direction of the roller conveyor 2 and The load 3 for the row is pushed out onto the lifting table 17. In this way, when the load 3 for one row is placed on the lift table 17, the lift table 17 is lifted in the lifter 10 and lifts the load 3 to the height of the carry-in section 9 of the stacker B.

A pusher 20 is disposed in front of the carry-in section 9. When the load 3 for one row is lifted up to the height of the carry-in section 9 by the lifter 10, the projecting section 21 of the pusher 20 projects and the lifting table is lifted. A horizontal traveling table 22 in which the load 3 for one row on 17 is positioned behind the loading section 9
Send it on.

There is a large opening 25 on the side surface of the skeleton 23 of the stacker B for taking in and out the pallet 24, and on the left and right side surfaces in front of this opening 25 (on the carrying-in side), the intermediate sprocket 26 and the driven side. Sprocket 2
A chain 28 is hung around the opening 7 and the opening 25
On the left and right sides behind the drive side sprocket 30 and the driven side sprocket 3 driven by the motor 29.
A chain 32 is hung around 1 and. further,
Drive side sprocket 30 and intermediate sprocket 26
A chain 33 is hung around. Reference numeral 40 denotes a pallet support floor on which the pallet 24 is placed. The four corners of the pallet support floor 40 are connected to the chains 28, 32. When the motor 29 is driven, the chains 28, 3
It can be vertically moved up and down by 2, 33.

Reference numeral 22 denotes a traveling table having a bendable structure, and rails (not shown) arranged in a substantially L shape along the upper space 34a and the rear space 34b in the ascending / descending region of the pallet support floor 40. ), The both ends are slidably held, and the traveling table 22 can be smoothly slid along the rail from the upper space 34a of the skeleton 23 to the rear space 34b. Also,
The chain 35 includes sprockets 36a, 36b, 36c,
36d, the upper space 34a and the rear space 34
The traveling table 22 is stretched in parallel with the rails over b, and the side ends of the traveling table 22 are connected to the chain 35. A chain 39 is also wound around the driving sprocket 38 driven by the motor 37 and the sprocket 36a. Then, when the motor 37 is driven, the chain 35 is driven via the chain 39, and the chain 35 moves the traveling table 22 into the upper space 34a and the rear space 3.
4b can be run. The traveling table 22
In order to make the traveling of the vehicle smooth, rollers may be provided at both end portions of the traveling table 22 and the rollers may be supported by rails.

FIG. 3 is a perspective view showing an example of such a traveling table 22 in which slender slats 41 such as steel products and aluminum extruded products are sequentially bendably connected (for example, shutters for entrances and exits of houses, etc.). The same structure as). The travel table 22 flexes freely in the length direction, which is the moving direction, but does not bend in the width direction, so that the load can be supported by the rigidity in the width direction. In addition,
It is preferable that the surface of the traveling table 22 has a smooth shape with no unevenness. FIG. 4 shows a traveling table 2
FIG. 7 is a partially enlarged view showing a part of another example of FIG. 2, in which the traveling table 22 is one in which a single smooth sheet 42 is stretched on the surface of the connected body of the slats 41. Since the surface of the traveling table 22 is smoothed by stretching the seat 42, the load 3 is less likely to be caught when the traveling table 22 is moved, and the load 3 is less likely to be tilted and fall when dropped. Therefore, the material of the sheet 42 is preferably a flexible resin sheet or cloth having a friction coefficient as small as possible and having abrasion resistance, a resin-processed cloth, or the like. 5 (a) and 5 (b) are a partially broken perspective view and a sectional view showing the structure of another traveling table 22, and the traveling table 22 has parallel shafts 43 arranged at regular intervals. Both ends of each are connected by chain pieces 44a and 44b, respectively. In such a structure, since the traveling table 22 can be incorporated in a part of the chain 35, the structure can be simplified. Further, FIG. 6 shows the traveling table 2
6 is a partial cross-sectional view showing still another example of No. 2, in which a sleeve 45 is rotatably fitted on the outer periphery of a shaft 43 of FIG. 5, and the sleeve 45 rotates freely so that the load 3 on the traveling table 22 is smooth. It is designed to be able to move to.

7A to 7F are views for explaining the operation of the stacker B, and FIG. 7A shows a state in which the pallet 24 is placed on the pallet support floor 40. When the pallet 24 is placed on the pallet support floor 40, the pallet support floor 40 raises the pallet 24 below the traveling table 22. Then, the load 3 fed from the lifter 10 one row at a time is loaded on the traveling table 2
When it reaches one step on 2 (FIG. 7B), the traveling table 2
2 moves at a high speed from above the pallet 24 and moves to the rear space 3
It is stored in 4b. At this time, the load 3 on the traveling table 22 is prevented from moving and positioned by the stopper 46, and at the moment when the traveling table 22 is pulled out from the lower surface of the load 3, one stage of the load 3 is smoothly placed on the pallet 24. It falls (FIG. 7 (c)). At this time, the load for one step 3
If the load 3 is dropped while being pressed from all sides by pushers (not shown), the load 3 can be dropped so as not to fall apart. Next, after the pallet 24 is lowered by one step, the traveling table 22 returns to above the pallet 24 again (FIG. 7 (d)), and the load 3 is fed from the lifter 10 again by one row. When the delivered load 3 reaches one level (FIG. 7 (e)), the traveling table 22 is moved to the rear space 3 again.
4b, and the load 3 for one step on the traveling table 22
Are dropped on the upper surface of the load 3 on the pallet 24, and the loads 3 are stacked (FIG. 7 (f)). After that, when the pallet 24 descends by one step, the traveling table 22 returns to above the pallet 24 again. When a predetermined number of loads 3 are stacked on the pallet 24 by repeating such operations, the pallet 24 loaded with a plurality of levels of loads 3 is carried out from the opening 25 by a forklift.

The direction of each load 3, the number of rows, the number of rows, etc. are registered in the computer in advance, and the above operation is automatically executed according to a program registered in advance. . Further, in the above-described embodiment, since the opening 25 is provided on the side surface, the traveling table 22 is accommodated in the rear space 34b of the body 23. However, for example, the opening 25 is provided on the back surface of the stacker B and the pallet 2 is inserted from the rear side.
4 when moving in and out, the traveling table 22 is the body 2
It is also possible to store it in any one of the side spaces 3 of the above.

In the above embodiment, the traveling table 22 is moved in and out by reversing the rotation direction of the chain 35. However, the traveling direction of the chain 35 is set to one direction, and the traveling table 22 is set to the upper space 34a and the rear space. 34
The traveling table 22 may be put in and taken out by rotating around with b.

FIGS. 8A, 8B, 8C and 8D are schematic views showing the structure and operation of a stacker C for palletizing in another embodiment of the present invention. In this embodiment, the upper space 34a, the rear space 34b, the front space 34.
c and the lower space 34d at the lowermost position of the pallet support floor 40
A rail (not shown) and a chain 35 are arranged so as to pass therethrough, and the traveling table 22 travels in an annular shape in the spaces 34a to 34d around the skeleton 23. That is, as shown in FIG. 8A, the traveling table 22 is on standby in the upper space 34 a, and the traveling table 22 is placed above
When the load 3 for one step is placed (FIG. 8 (b)), the traveling table 22 travels and the load 3 for one step is dropped on the pallet 24 (FIG. 8 (c)). The vehicle travels around the opening 25 (FIG. 8D), returns to the upper space 34a again, and stands by. By repeating such an operation, the loads 3 are stacked on the pallet 24 in a plurality of stages.

FIG. 9 is a schematic view showing the structure of a stacker D for palletizing according to still another embodiment of the present invention. In this embodiment, in the structure as shown in FIG. 8, the chain 35 is provided with a plurality of traveling tables 22. By providing a plurality of traveling tables 22 in this way, the traveling distance of the traveling tables 22 can be shortened, and wasteful traveling of the traveling tables 22 can be reduced and rationalized.

FIGS. 10A and 10B are schematic views showing the structure and operation of a stacker E for palletizing according to still another embodiment of the present invention. In this embodiment, the pallet 2 is wound by winding the traveling table 22 around the winding shaft 47.
4 is to be retracted and stored from above. According to this embodiment, since the traveling table 22 is directly wound around the winding shaft 47 without using the chain 35, the noise caused by the chain 35 can be reduced.

11A and 11B are schematic views showing the structure and operation of a stacker F for palletizing according to still another embodiment of the present invention. In this embodiment, the two sprockets 4 provided on the elevating part 48 that can be elevated and lowered.
A chain 35 is hung between 9 and 50, and both ends of the traveling table 22 held in rails (not shown) are connected to the chain 35. A motor (not shown) for rotating the chain 35 is also provided in the elevating part 48. Therefore, the traveling table 22 can revolve above the pallet 24. In this embodiment, as shown in FIG. 11A, the load 3 is placed on the traveling table 22 which is horizontally extended above the pallet 24, and the traveling table 22 is caused to travel, as shown in FIG. 11B. The load 3 can be dropped onto the pallet 24 by folding it in half on one side and storing it. According to this embodiment, the traveling distance of the traveling table 22 can be shortened and the speed can be increased as compared with the structure of the embodiment shown in FIG. Further, according to this embodiment, the lifting unit 48
Since the traveling table 22 can be raised and lowered by raising and lowering, the pallet support floor 40 can be fixed and the height of the traveling table 22 can be changed.
It can be realized with a simple structure.

It should be noted that the structure other than that shown in FIG. 11 may be used even if the pallet support floor 40 is fixed and the height of the traveling table 22 is changed. Further, in the structure as shown in FIG. 11, the height of the traveling table 22 is fixed and the pallet support floor 4
There is no problem even if the height of 0 is changed.

12 and 13 are sectional views showing still another stacker G of the present invention. The stacker G is mainly used for stacking paper on the pallet 51. For example, the stacker G is installed adjacent to a cutting machine, moves the cut paper onto the traveling table 52, and the pallet 51 under the paper. Can be loaded on.

FIG. 14 is a partially cutaway perspective view showing the structure of the traveling table 52 used in the stacker G. The traveling table 52 also has a bendable structure. That is, the traveling table 52 is formed in a planar shape by laying out the hollow rectangular pipe-shaped bars 53 in parallel, and the lower surfaces of both ends of each bar 53 are fixed to the chain 54, respectively. That is, the bars 53 are connected to each other via the chain 54 to form a bendable integral structure. The two chains 54 are respectively arranged on both sides of the table frame portion 55, and as shown in FIG. 12, the three sprockets 5 in the table frame portion 55 are arranged.
6, 57, 58 and a motor 59 installed therebelow are wound around a sprocket 60. When the motor 59 drives the chain 54 to pull out the traveling table 52 into the space above the lifter 61 surrounded by the table frame portion 55, the traveling table 52 is horizontally extended and can receive paper. Becomes Also, the chain 5
When the driving table 4 is driven and the traveling table 52 is housed in the space behind the lifter 61, the space above the lifter 61 is opened. In the traveling table 52 shown in FIG. 14, the bars 53 are separated and independent from each other, but adjacent bars 53 may be connected by a flexible connecting portion such as a hinge structure or resin.

As shown in FIG. 14, a sheet 62 made of a flexible material such as resin or rubber is laid on the upper surface of the traveling table 52, but the sheet 62 and the traveling table 52 are only at the leading edge portion. The seats 62 are connected to each other and the seat 62 is simply placed on the traveling table 52 in the other portions. The sheet 62 has its direction changed by an intermediate roller 63 provided on the upper surface of the rear portion of the table frame 55, and is then wound up by a winding roller 64 disposed above the intermediate roller 63. When the traveling table 52 and the seat 62 are stored, it is difficult to wind or store the traveling table 52 and the seat 62 together due to the difference in the winding diameters. The sheet 62 and the sheet 62 are stored or wound by individual storing means. As a result, the traveling table 52 and the seat 62 can be stored smoothly without damaging them. Further, in order to keep the winding speed (peripheral speed) of the sheet 62 wound around the winding roller 64 consistent with the traveling speed of the traveling table 52, the winding roller 64 is driven by the motor 65 with a slip clutch. There is.

The sheet 62 is provided to reduce the friction with the paper placed on the traveling table 52 and improve the slippage of the paper, but further reduce the friction of the paper on the traveling table 52. The traveling table 5
2 has means for blowing air from the upper surface. That is, both ends of the bar 53 at substantially regular intervals are closed by the end face plates 66, and the air outlet 67 is opened on the upper surface of the bar 53. Further, an air passage hole 68 is opened in the sheet 62 so as to coincide with the air outlet 67. Air is blown into the bar 53 having the air outlet 67 from the blower 69. When air is blown into the bar 653, air is blown from the upper surface of the sheet 62 through the air outlet 67 and the air passage hole 68. Blown out. Therefore, when the paper is placed on the sheet 62 of the traveling table 52, an air layer is formed between the paper and the sheet 62, and the paper can move smoothly on the traveling table 52.

When the bar 53 and the bar 53 are independent and there is a gap therebetween as in this embodiment, unless the sheet 62 is provided on the traveling table 52, the air is blown out from the air outlet 67. Air is bar 53 and bar 53
The sheet 62 is necessary because it leaks downwards from between and cannot create an air layer between the paper and the travel table 52. That is, when the seat 62 is provided on the traveling table 52, there is no risk that the air blown out from the air blow-out hole 67 will leak from between the bars 53 after flowing out to the upper surface of the seat 62 through the air passing hole 68. , Paper and sheets 62
And becomes an air layer. However, bar 62 and bar 62
If there is no risk of air leaking from between the bars 62 because the spaces are connected by a hinge means or the like, a structure without the seat 62 may be used.

The structure for sending air to the bar 53 of the traveling table 52 is not particularly limited, but for example, referring to FIGS. 12 to 14, it is arranged so as to travel substantially parallel to the chain 54. An air outlet 67 is provided by an air hose 71 installed in the cable bear 70.
Any one of the bars 53 having a blower 69 is connected, and the bar 53 having an air outlet 67 is further connected.
Comrades are connected by an air hose 72. With such a configuration, air can be blown out from the air blowing port even while the traveling table is traveling. Although not shown, the air connection port is fixed at a position facing the side surface of the traveling table 52 on the inner side surface of the table frame portion 55, and the bar 53 of the traveling table 52 is provided only when the traveling table 52 is pulled out. Can be connected to the air connection port so that air can be blown out from the air blowing port 67.

In FIG. 12, 73 is a width-shifting plate and 74 is a stopper, and the width-shifting plate 73 and the stopper 74 face each other in parallel. Width adjustment plate 7
The reference numeral 3 is attached to a guide rail portion 75 which is horizontally crossed forward and backward above the right side portion of the table frame portion 55 in the figure, and can be translated back and forth along the drive mechanism portion 76 along the guide rail portion 75. It is like this. Further, an alignment surface 77 is provided below the guide rail portion 75. Then, when the paper is carried onto the traveling table 52 so that the edges thereof come into contact with the stopper 74 and the alignment surface 77, the width-shifting plate 73 is driven to move the paper on the traveling table 52 to the stopper 74 side. Is pushed to
The sheets are aligned by being sandwiched between the stopper 74 and the width-shifting plate 73 and positioned at a fixed position. Further, the paper positioned at the position of the stopper 74 is gripped by the paper holding device 78.

FIG. 15 is a view showing the structure of the paper holding device 78. The base 79 is rotatably supported by a pivot portion 80 with respect to a fixed portion, and the rod tip of an air cylinder 81 whose base end portion is rotatably supported by the fixed portion is rotated by the base 79. It is movably connected. Two right and left support columns 82 are slidably inserted into the base 79, and a comb-shaped lower holding plate 83 is fixed to the lower end of the support column 82, and is attached to the upper end of the support section 82. Is base 7
The rod tip of the air cylinder 84 fixed to 9 is connected. A fixing plate 85 is fixed to the two supporting columns 82 above the lower holding plate 83.
The base portion of the upper holding piece 86 is slidably inserted into the support column 82 below 5, and the rod tip of the air cylinder 87 fixed to the fixed plate 85 is connected to the base portion of the upper holding piece. Then, the air cylinder 87
Only the upper holding piece 86 can be moved up and down by driving and expanding and contracting, and the paper can be grasped or separated between the upper holding piece 86 and the lower holding plate 83. Also,
Since the column portion 82 can be slid up and down by driving and expanding and contracting the air cylinder 84, both the upper holding piece 86 and the lower holding plate 83 can be moved up and down, for example, the upper holding piece 86 and the lower holding plate. It is possible to move up and down while holding the paper between 83 and it. Further, the air cylinder 81 is normally contracted so that the base 79 is horizontal, and the upper holding piece 86 and the lower holding plate 83 project from between the stoppers 74. However, when the air cylinder 81 is driven to extend, Since 79 rotates up and down, for example, by extending the air cylinder 81 and rotating the base 79 upward, as shown in FIG.
Also, the lower holding plate 83 can be retracted inward from the stopper 74.

With the structure in which the upper holding piece 86 and the lower holding plate 83 are pulled out and retracted by rotating in this manner, the upper holding piece 86 and the lower holding plate 83 are moved horizontally to be pulled out and retracted. The structure is simpler and the size is more compact than that of the stacker G
Contribute to downsizing.

Next, the operation or use of the stacker G will be described. In the standby state, the traveling table 52 is horizontally pulled out on the lifter 61 as shown in FIG. Air is blown from the air blowout port 67 of the traveling table 52. When the paper 88 is carried onto the traveling table 52, the edge of the paper 88 is properly set on the alignment surface 77 and the stopper 74, and then the automatic start button is pressed. When the stacker G starts to operate, the width-shifting plate 73 is driven to push the paper 88 toward the stopper 74, and the paper 88 of an arbitrary size is brought into contact with the stopper 74 and positioned accurately. When the paper 88 has been moved to the stopper 74 side, the upper holding piece 86 of the paper holding device 78 descends and the upper holding piece 86 and the lower holding plate 83 grip the edge of the paper 88 from above and below and hold it.
Then, as shown in FIG. 16 (b), the traveling table 52 is housed rearward and the sheet 62 is taken up by the winding roller 64.
The paper 88 is wound on the pallet 51 or the pallet 5
It falls on the paper 88 on 1. At this time, the upper holding piece 86 and the lower holding plate 83 of the paper holding device 78 also go down together with the paper 88 while holding the paper 88. Since the paper 88 is positioned by the stopper 74, it is neatly arranged and stacked on the pallet 51. Paper 88 is pallet 51
When the upper holding piece 86 of the paper holding device 78 rises to release the paper 88, the upper holding piece 86 and the lower holding plate 83 rotate together with the base 79 to rotate the upper holding piece 86 and the lower holding piece. The plate 83 retracts inside the stopper 74, whereby the lower holding plate 83 is pulled out from between the paper sheets 88. When the lower holding plate 83 comes off, the paper holding device 78 returns to the original position. When the paper 88 is stacked on the pallet 51, the lifter 61 lowers and stops while detecting with a sensor (not shown) so that the upper end surface of the stacked paper 88 has a constant height,
The traveling table 52 and the seat 62 are again pulled out above the lifter 61.

When the sheets 88 are stacked at a predetermined height, the stacked sheets 88 are carried out in front of the stacker G together with the pallet 51. The table frame portion 55 is U-shaped in a plan view and the front portion is open. Further, the paper holding device 78 has one side portion rotatably attached by a hinge 89, so that it is shown in FIG. Paper holding device 78
By rotating and opening, the paper 88 stacked on the pallet 51 can be easily carried out of the stacker G even if the pile of paper 88 is high.

As described above, the traveling table 5 of the stacker G is
By stacking 2 to allow storage, the stacker G can be made very compact, and an installation space that is almost half that of a conventional stacker can be realized.

FIG. 18 is a schematic view showing a stacker H according to still another embodiment of the present invention, in which a take-up roller 64 for taking up the sheet 62 is provided below and a traveling table 52 is provided.
Similarly to the above, the seat 62 is also accommodated downward.

[0051]

According to the present invention, even when a table on which a load is placed is moved from above the load receiving portion, by bending the table, for example, the table can be stored in the outer peripheral space, wound, or rotated. By doing
Since it is possible to prevent the table from protruding to the outside, there is no risk of the table colliding with a worker who is working in the surroundings, safety is improved, and a working environment can be improved.

Further, since the table can be compactly housed without popping out to the outside, the stacker can be downsized, and the occupied area and space at the time of installation can be reduced.

If the height of the load receiving portion or the height of the table can be adjusted, the distance that the load falls from the table to the load receiving portion can be reduced, so that the load can be smoothly transferred to the load receiving portion. Can be posted.

Further, if air is blown from the table, the slip of the load can be improved when the load is dropped from the table.

Further, by tensioning the sheet on the upper surface of the table, the friction with the load can be reduced. Therefore, when the table is pulled out from the lower surface of the load, the table can be pulled out smoothly without disturbing the arrangement of the load. be able to.

Further, by providing the load holding device for grasping the end of the load placed on the table, the load can be prevented from moving together with the table, and the load can be reliably dropped onto the load receiving portion. it can. Moreover, if the load holding unit is rotatably supported and the load held by rotating the load holding device is released, the load holding unit is moved horizontally to release the load. The load holding portion can be made compact as compared with the above, and the stacker can be made more compact.

[Brief description of drawings]

FIG. 1 is a front view showing a stacker system according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view showing the structure of the above stacker system.

FIG. 3 is a perspective view showing a traveling table of the above.

FIG. 4 is a partially enlarged side view showing a part of another traveling table.

5A and 5B are a partially enlarged perspective view and a cross-sectional view showing a part of a traveling table having still another structure.

FIG. 6 is a cross-sectional view showing a part of a traveling table having still another structure.

7 (a), (b), (c), (d), (e), and (f) are schematic views for explaining the operation of the above stacker.

8A, 8B, 8C and 8D are schematic views showing the structure and operation of a stacker according to another embodiment of the present invention.

FIG. 9 is a schematic view showing the structure of a stacker according to still another embodiment of the present invention.

10A and 10B are schematic diagrams showing the structure and operation of a stacker according to still another embodiment of the present invention.

11A and 11B are schematic diagrams showing the structure and operation of a stacker according to still another embodiment of the present invention.

FIG. 12 is a side sectional view showing the structure of a stacker according to another embodiment of the present invention.

FIG. 13 is a sectional view of the above.

FIG. 14 is a partially cutaway perspective view showing the structure of the above table.

FIG. 15 is a side view showing the inside of the above paper holding device.

16 (a) and 16 (b) are operation explanatory views of the above stacker.

FIG. 17 is a schematic plan view showing a state in which the above paper holding device is opened.

FIG. 18 is a schematic view showing the structure of a stacker according to still another embodiment of the present invention.

19 (a) (b) (c) (d) (e) (f)
(G) is a schematic view showing a structure and operation of a stacker for palletizing according to a conventional example.

FIG. 20 is a diagram for explaining a defect of the conventional example.

FIG. 21 is a schematic view showing another conventional stacker.

[Explanation of symbols]

 1 Belt Conveyor 2 Roller Conveyor 3 Cargo 9 Carry-in Section 10 Lifter 22 Traveling Table 24 Pallet 25 Opening 35 Chain 40 Pallet Support Floor 41 Slat 42 Sheet 47 Winding Spindle 52 Traveling Table 54 Chain 62 Sheet 64 Winding Roller 67 Air Blowout Port 68 Air through hole

Claims (12)

[Claims] 1. The load on the table is dropped onto the load receiving section by moving the table so that the load placed on the table located above the load receiving section remains above the load receiving section. A stacker in which loads are stacked on a section, wherein the table has a structure that can be bent along a moving direction thereof. 2. The stacker according to claim 1, wherein the table can be stored in a space around the load receiving portion. 3. The stacker according to claim 1, wherein the table is wound so as to be stored. 4. The stacker according to claim 1, wherein the table is configured to pass above and below the load receiving portion and revolve. 5. The stacker according to claim 1, wherein the table is configured to circulate above the load receiving portion. 6. The stacker according to claim 1, wherein the height of the load receiving portion can be adjusted. 7. The stacker according to claim 1, 2, 3, 4 or 5, wherein the height of the table is adjustable. 8. The stacker according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the table is provided with air blowing means. 9. The sheet according to claim 1, wherein a sheet for reducing friction with a load is stretched on the upper surface of the table. Stacker. 10. The table according to claim 1, wherein the table and the sheet are accommodated by separate accommodating means. Stacker. 11. A load holding device for gripping an end of a load placed on the table is rotatably supported, and the load held is released by rotating the load holding device. Claims 1, 2, 3, characterized in that
The stacker according to 4, 5, 6, 7, 8, 9 or 10. 12. The method according to claim 1, 2, 3, 4, 5, 6, 7,
A stacker system comprising: the stacker described in 8, 9, 10 or 11, and a load supply device for arranging loads to be supplied one by one on a table of the stacker.