JPH0620742Y2 - Pallet conveyor equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pallet-using conveyor device that is used to simultaneously supply a pair of left and right pallets on which loads are placed to an upstream end and to take them out from a downstream end. Is.

2. Description of the Related Art Conventionally, as a conveyor device of this type, for example,
There is provided a gravitation roller conveyor utilizing pallets found in Japanese Patent Publication 57-77206. In this conventional configuration, a plurality of compartment spaces are formed in a shelf, and a gravity roller conveyor is arranged in each compartment space. Then, by supplying the pallet on which the load is placed to the upper slope side which is the upstream end, this pallet is transported to the downstream end side and taken out from this downstream end. At that time, supply and removal are performed by a forklift.

By the way, recently, two loads, that is, a pair of pallets can be simultaneously supplied by a forklift depending on the shape of the load to be handled. Therefore, by arranging a pair of right and left gravity roller conveyors side by side in the partitioned space, a pair of left and right pallets can be simultaneously supplied (stored) to the upstream end thereof for storage. Then, the pallets (loads) in the storage can be individually taken out (delivered) from the downstream end as needed.

Problems to be Solved by the Invention In the above-mentioned conventional type, normally, a pair of left and right pallets are supplied (stored) in a state where the side surfaces of the load are in contact with each other, and therefore, during storage and storage. Sliding contact will occur at the contact part during (delivery). That is, since the number of storages of the load is different in each transport route (storage route), and therefore the moving distance until the load simultaneously contacted with the load in front is different, the sliding contact occurs by the different distance. It will be. Further, when one load is taken out, sliding contact occurs with the other load. If such a sliding contact occurs, the load may be damaged, the transfer may not be smoothly performed on the transfer route, and the load may be dropped when the forklift takes out the load.

An object of the present invention is to provide a conveyor device using pallets, which can supply two loads at the same time, but does not cause sliding contact during transportation or removal.

Means for Solving the Problems In order to achieve the above-mentioned object, a conveyor device using pallets in the present invention has a pair of left and right conveyors for conveying a load in the front-rear direction, and a mountain-shaped distribution guide body is provided between these conveyors. The sorting guide body is provided with a pair of left and right sorting inclined surfaces for sorting the pallet in the left-right direction and a pair of left and right guide surfaces for guiding one side surface of the pallet conveyed in the front-rear direction. Between the upper ends of the sorting slope,
At the same time, the interval between a pair of left and right pallets placed on both conveyors is formed narrower, and the conveyor is provided with a guide device for guiding the other side surface of the pallet conveyed in the front-rear direction.

According to the structure of the present invention, a pair of pallets supporting loads whose side surfaces are in contact with each other can be simultaneously supplied onto a pair of left and right conveyors by a forklift. Prior to being fed onto the conveyor, the lower corners of the opposite sides abut the chevron distribution ramp and are automatically separated left and right as they are lowered. Therefore, when the load is placed on the conveyor out of the distribution inclined surface, the pair of loads are separated from the side surfaces facing each other.

After the pallets are supplied, each pallet is conveyed in the front-rear direction on the conveyor while one side surface thereof is guided by the guide surface of the sorting guide body and the other side surface thereof is guided by the guide device.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 50 denotes a shelf frame, which includes a plurality of left and right front columns 51, a plurality of left and right rear columns 52, a front cross member 53 connecting the front columns 51, and a rear column 52. Rear cross member 54
And a front and rear member 55 connecting the front and rear of the front support column 51 and the rear support column 52. A pair of left and right roller conveyors 1 and 2 are respectively formed in a plurality of partition portions 57 formed between the columns 51 and 52 of the shelf frame 50 in the left-right direction, and the conveyance direction 4 is horizontal in the front-rear direction, and a plurality of upper and lower stages are respectively provided. (4 in the embodiment
). These roller conveyors 1 and 2 have the same or symmetrical shape and are composed of a pair of left and right conveyor units 3A and 3B, respectively. That is, FIGS. 1 to 5
As shown in the figure, the main body frame 5 of both conveyor sections 3A and 3B includes a pair of left and right side frames 5A and 5B, and these side frames 5A and 5B.
5B and a base frame 5C connecting the lower parts of the 5B. The number of base frames 5C is several in the carrying direction 4,
It is connected between both side frames 5A and 5B via bolts and nuts 6A and 6B which are passed from below. Further, both side frames 5A and 5B located outside are provided with the shelf frame 50 and a distribution guide body (described later) via bolts and nuts 7A and 7B.
Fixed to. L-shaped guide portions 8A and 8B are formed on the inner side surfaces of the side frames 5A and 5B, which face each other, and dovetail groove portions 10A and 10B that allow the nut bodies 9A and 9B to slide are formed on the upper portions. A guide rail 12 is disposed in the frame length direction on the outer side frame 5A of the one conveyor portion 3A, on the inner surface side of the lower portion thereof, via a mounting portion 11. On the inner surfaces of the side frames 5A and 5B, resin supporting frames 13A and 13B are provided so that their lower ends are fitted to each other so that the positions can be changed (sliding) in the frame length direction.
Is fixed at the changed position by screwing bolts 15A and 15B, which are inserted through mounting holes 14A and 14B formed in the intermediate portion, into the nut bodies 9A and 9B. One conveyor section 3
A support frame 13A on the outer side of A is case-shaped, and is connected from the inner surface of the lower half of the base plate portion 16 to the inner side with the base plate portion 16 in which the lower end to be fitted to the guide portion 8A and the mounting hole 14A are formed. It is formed by a pair of front and rear cover plate parts 17 provided and a connecting plate part provided between the lower ends of these cover plate parts 17, and a pair of upper and lower through holes 18a above the mounting holes of the base plate part 16, 18b is formed. The same through holes 18a and 18a are formed in the inner supporting frame 13A of the other conveyor section 3B.
b is formed. The remaining support frames 13B of both conveyors 3A and 3B are rectangular plate-like, and have locking grooves 19a and 19b with upper and lower end surfaces in the height direction and inner side surfaces open on both sides across a pair of mounting holes 14B. Are formed. Here the locking groove 19
Distances H ₁ and H from the back of a and 19b to the mounting hole 14B
₂ is equal to the distances H ₁ and H ₂ from the mounting hole 14A to the through holes 18a and 18b in the one support frame 13A. Between the support frames 13A and 13B, resin idle rollers 22 and 22a are rotatably provided via a roller shaft 21. That is, one end of the roller shaft 21 that is inserted freely relative to each other is inserted into one of the through holes 18a and 18b, and the other end is dropped into one of the locking grooves 19a and 19b from above so that the roller shaft 21 It can be attached, and can be freely rotated around the roller shaft center 23. A support shaft 24 along a roller shaft center 23 is attached to an outer support frame 13A of one conveyor portion 3A so as to be vertically swingable. That is, the bearing hole portion 25 is provided at the lower end of the substrate portion 16.
Is formed, and the inner end of the support shaft 24 is fitted into the bearing hole portion 25 so as to be vertically swingable. An L-shaped plate portion 26 made of resin is inserted and mounted between the free ends of the cover plate portion 17, and the outer end of the support shaft 24 is fitted into a vertical recess formed in the vertical plate of the L-shaped plate portion 26. In addition, the vertical swing range of the support shaft 24 is restricted. A sprocket 27 is rotatably attached to the support shaft 24, and a transmission roller 28 is attached to a boss portion of the sprocket 27.
Is fitted to the outside so that both 27 and 28 can rotate together. The transmission roller 28 is made of urethane rubber, and the outer periphery of the transmission roller 28 can be brought into contact with and separated from the lower outer periphery of the idler roller 22. And an air cylinder device which is an operating device for performing contact and separation.
29 is the cylinder rubber receiver 30 attached to the outer end of the support shaft 24 and L
It is interposed between the shaped plate portion 26 and the lateral plate. 24 above
The transmission device 31 is made into one unit by 30. The transmission device 31 is provided with the idler roller 22 via the support frames 13A and 13B.
And a plurality of them are arranged on the main body frame 5. A common drive chain 32 that is linked to each sprocket 27 is stretched between a drive sprocket 33 and a driven sprocket 34, and the drive sprocket 33 is linked to a motor 36. Here, in the drive chain 32, the outward path of the working side meshes with the upper part of the sprocket 27 group, the return path of the non-working side meshes with the lower part of the sprocket 27 group, and the lower surface of the drive chain 32 is supported by the guide rail 12 in the returning path. You are being guided.

By disposing the idler roller 22 paired with the drive device 31 and the free idler roller 22a not paired with each other at the set pitch P on the main body frame 5 as described above, both conveyor parts 3A, 3B Thus, the transport path 37 is formed. 38 is a load and is handled via the pallet 39. In addition, pallet 39
A fork insertion space 39a is formed therein. A stopper 56 fixed to the shelf frame 50 side is provided at the terminal end of the transport path 37.

As described above, the idler roller 22 paired with the transmission 31.
Is a predetermined array 6 as shown in FIG.
There are a plurality of groups, one group being 8 groups A, B, C, D, E, F, G, H in the embodiment, and a transmission device 31 can be freely separated and connected via an air cylinder device 29 for each group. I am trying. That is, for each group, an air supply / exhaust hose 40 in which the air cylinder devices 29 are connected in series is provided, and the downstream ends of these air supply / exhaust hose 40 are connected to the common air supply device 42 via the electromagnetic valve device 41. Air supply hose
It is configured to be connectable / disconnectable as an alternative to 43. The valve device 41 is of an electromagnetic type, and is switched and operated by a load detection device 46 that detects a load by the upper hand of the idler roller 22 on the most downstream side in each of the groups A to H. That is, the valve device 41 is
When the load 38 is absent and the presence detection device 46 is not detected, the supply / discharge hose 40 is connected to the supply hose 43, and when the presence of the load 38 and the presence detection device 46 is detected, the supply / discharge hose 40 is connected. It operates to divide the air supply hose 43. Although a photoelectric tube device is used as the presence detection device 46, this may be another type such as a limit switch. In the groups C to H other than the two groups A and B on the downstream side,
The upstream end of each supply / discharge hose 40 has one lower group B to G.
Is connected to the downstream end of the supply / discharge hose 40 via a communication hose 44. In the two downstream groups A and B, the connecting hoses 45 connect the upstream ends of the supply / discharge hoses 40. The above-mentioned hoses 40, 43, 44, 45 and the like constitute an operating circuit 48 in which the transmission device 31 and the valve device 41 are interposed, and the operating circuits 48 are adjacent to each other in the carrying direction 4.
When the downstream side group of the two groups is absent, both transmission devices 31 are connected, and the most downstream group A separates the transmission device 31 when there is a load.

As shown in FIGS. 1 to 3, a mountain-shaped distribution guide body 60 is arranged between the pair of left and right roller conveyors 1, 2.
The sorting guide body 60 includes a short-width top plate portion 61, a pair of left and right inclined plate portions 62 extending downward from the top plate portion 61, and a side plate portion 63 hanging from the free ends of the inclined plate portions 62. The side plate portions 63 are fixed to the side frames 5A and 5B through the bolts and nuts 7A and 7B. And the inclined plate portion 62
The outer inclined surface 62a is formed by the outer surface, and the outer inclined surface 62a is formed by the outer surface of the side plate portion 63.

The space between the upper end portions of the pair of left and right sorting inclined surfaces 62a (that is, the width of the top plate portion 61) is formed to be narrower than the distance between the pair of left and right pallets 39 placed on both roller conveyors 1 and 2 at the same time. There is. A guide roller 20, which is an example of a guide device, is provided on the outer side frames 5A and 5B so as to face the guide surface 63a. The forklift includes a double forklift 65 having a double fork (four forks) 64 capable of simultaneously handling two pallets 39 and a single forklift 67 having a single fork (two forks) 66 capable of handling one pallet 39. It

Next, the carrying work in the above embodiment will be described.

3 and 4, the valve device 41 is actuated to the connection side in order to supply compressed air to the supply / discharge hose 40, and the support shaft 24 is swung upward by the extension of the air cylinder device 29, so that the transmission roller 28 is moved. It shows a state in which each of the rollers is pressed against the corresponding idler roller 22 from below. At this time, the drive chain 32 is constantly driven by the motor 36, so that the sprocket 27 in which the drive chain 32 meshes with the upper part and the lower part is rotating around the support shaft 24. Further, the transmission roller 28 is in contact with the lower portion of the outer periphery of the idler roller 22 to forcibly rotate the idler roller 22 group. As a result, the pallet 39 on the transport path 37 is supported between the idler rollers 22 and 22a of both the conveyor units 3A and 3B, and receives the transport force by the forced rotation of the idler roller group 22 on one side, It can be transported on this transport path 37.

The roller conveyors 1 and 2 including the pair of conveyor units 3A and 3B are basically pallets (loads) as described above.
Although 39 is conveyed, the conveyance control is actually performed based on the presence detection device 46 detecting / non-detecting the pallet 39. That is, when the conveyance path 37 is empty, since the presence detection devices 46 are not detected and communicate with the valve device 41, the air from the air supply hose 43 is supplied through the valve device 41. Each air cylinder device is supplied to the exhaust hose 40
All 17 idle rollers of all groups A to H by extending 17
22 is forced to rotate. In this state, when the pallet 39 is unloaded onto the group H at the upstream end by the double forklift 65, the valve device 41 of the group H performs the dividing operation by the presence detection of the presence detection device 46, but one group downstream G
As described above, in the valve device 41 of the above, since the presence detection device 46 is not detected, a part of the air supplied to the group G is supplied to the supply / discharge hose 40 via the connection hose 44, and The air cylinder device 29 will be connected and moved,
As a result, the idle rollers 22 of the groups H and G are forcibly rotated to convey the pallet 39 from the group H to the group G. When Pallet 39 enters Group G, this Group G
However, since the in-load detection device 46 of the group F does not detect the group F as described above, similarly, the idle rollers 22 of the group G are forcibly rotated and the pallet 39 moves to the group G.
Is transported to the group F. In this way, the pallet 39 sequentially conveyed to the downstream side comes into contact with the stopper 56, stops, and is stored in the group A. The pallet 39 is detected by the presence detection device 46 of the group A and the valve device 41 is detected.
When the supply / discharge hose 40 of the group A is stopped at the same time as the supply / discharge hose 40 of the group A is opened, the drive device 31 of the group A is separated to force all idle rollers 22. Stop rotation. The second pallet 39 is also conveyed in the same manner, abuts against the pallet 39 of the group A and is stored in the group B. Group B at this time
However, since the group A is also detected, the group B is also separated. It is assumed that the loads 38 are stored in all the groups A to H and all of them are separated by such work. In this state, if the load 38a of the group A is taken out by the single forklift 67 as shown in FIG. 6, the presence detection device 46 of the group A becomes non-detected, so that the groups A and B are connected and moved. As shown in FIG. 7, the load 38b of the group B is conveyed to the group A. Then, the presence detection device 46 of the group B becomes non-detected, so that the groups B and C are connected to each other, so that the load 38c of the group C is moved to the group B as shown in FIGS. 5 and 8. Transport. By repeating such an operation, the load 38 can be sequentially fed.

The above-described unloading (loading) of the load 38 to the upstream end is performed by the double fork lift 65 having the double fork 64 at the same time. That is, as shown in FIG. 2A, the two pallets 39 are carried into the upstream end of the partition 57 by the double forklift 65 in a state where the side surfaces of the load 38 are in contact with each other. Then, when the double fork 65 is lowered, first, the lower corner portions on the opposite sides of both pallets 39 come into contact with the distribution inclined surface 62a, and as they are subsequently lowered, the lower corner portions are guided by the distribution inclined surface 62a and horizontally. As a result, the pallets 39 are automatically separated right and left. Therefore both pallets
39 is separated from the sorting inclined surface 62a, and both roller conveyors 1,
When placed on the second side, the pair of loads 38 are separated from the side surfaces facing each other. As a result, the conveyance to the downstream side does not cause sliding contact between the opposite side surfaces,
Moreover, one side surface of each pallet 39 is guided by the guide surface 63a of the sorting guide body 60, and the other side surface is guided by the guide roller 2.
It will be guided by 0.

When the two pallets 39 are distributed to the left and right, a lateral sliding contact occurs between the pallet 39 and the double fork 64 in the fork insertion space 39a, but this does not disturb the desired fork support. It should be noted that the storage at the upstream end can be carried out one by one using the single forklift 67 having the single fork 66.

The above-mentioned removal (delivery) of the load 38 from the downstream end is performed one by one by the single forklift 67 having the single fork 66. At this time, since the side surfaces of the load 38 are separated from each other, the load 38 can be taken out without sliding contact or the like.

Although the transport path 37 is horizontal in the above embodiment, the transport path 37 may be inclined when a brake device is provided for each of the groups A to H. Also the transport route
It may be a gravity roller conveyor type in which 37 is inclined or a belt conveyor type. Further, it may be a floor conveyor type in which a pair of left and right conveyors are arranged side by side on the floor.

When the drive control type of a plurality of groups A to H is adopted as in the above embodiment, the load 38 supplied to the upstream end can be sequentially conveyed to the downstream end. Then, it is stored from the downstream end toward the upstream, but at this time, in the most downstream group, the presence detection device 46 detects the presence and the transmission device 31 is separated and becomes non-driving. In the group, since the transmission device 31 is separated and becomes non-driving due to the simultaneous presence detection with the downstream group based on the detection operation of the presence detection device 46, the transmission device is stored in the stored load 38.
31 does not feed, and damage to the load 38 and the transmission 31 can be prevented. Then, it is possible to sequentially take out from the most downstream load 38 by forking, but at this time, when a group in which the load 38 does not exist occurs, this group and the upstream load group are driven simultaneously and upstream. Side load 38 can be transported downstream, which
38 can be sent in sequence and can be densely stored from the downstream side to the upstream side. In this way, only the required load 38 can be forcibly moved within the shelf, and reliable movement (sequential feeding) can always be performed irrespective of the variation in load and the material of the pallet. Moreover, since the moving speed can be kept constant, stable transportation can be performed.

EFFECTS OF THE INVENTION According to the present invention having the above-described structure, a pair of pallets supporting loads whose side surfaces are in contact with each other can be efficiently supplied onto a pair of left and right conveyors simultaneously by a forklift. At that time, both pallets shall be moved to the left and right automatically as the lower corners on the opposite sides abut on the mountain-shaped distribution inclined surface before being fed onto the respective conveyors, and as they descend. And thus when placed on the conveyor off the sorting ramp,
The pair of loads can separate the opposite side surfaces. As a result, the load can be smoothly conveyed on the downstream side and taken out from the downstream end without causing damage or dropping due to sliding contact.

After the pallets are supplied, each pallet is smoothly transported in the front-rear direction on the conveyor while one side surface thereof is guided by the guide surface of the sorting guide body and the other side surface thereof is guided by the guide device.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of the whole, FIG. 2 is a front view of the same main part, FIG. 3 is a partially cutaway front view of the main part, and FIG. 4 is the same. Partial cutaway side view, FIG. 5 is a schematic side view of a main part, and FIGS. 6 to 8 are schematic side views for explaining the operation. 1, 2 ... Roller conveyor, 3A, 3B ... Conveyor section, 4
… Transport direction, 5… Main frame, 12… Guide rail, 13
A, 13B ... Support frame, 21 ... Roller shaft, 22, 22a ... Idler roller, 2
4 ... spindle, 27 ... sprocket, 28 ... transmission roller, 29 ... air cylinder device, 31 ... transmission device, 32 ... drive chain, 36 ...
Motor, 37 ... Conveyance path, 38, 38a to 38f ... Load, 39 ... Pallet, 39a ... Fork insertion space, 41 ... Valve device, 46 ... Load detection device, 48 ... Actuation circuit, 50 ... Shelf frame, 57 ... Compartment, 60 ...
Sorting guide body, 62a ... Sorting inclined surface, 63a ... Guide surface,
64 ... Double fork, 65 ... Double forklift, 66 ...
Single fork, 67 ... Single forklift.

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right conveyors that convey a load in the front-rear direction are arranged side by side, and a mountain-shaped distribution guide body is disposed between these conveyors, and a left-right pair that distributes a pallet in the left-right direction to the distribution guide body. And a pair of left and right guide surfaces that guide one side surface of the pallet conveyed in the front-rear direction, and a pair of left and right conveyors that are placed on both conveyors at the same time between the upper ends of the above-mentioned both distribution inclined surfaces. A conveyor device using pallets, characterized in that it is formed to be narrower than the interval between the pallets, and the conveyor is provided with a guide device for guiding the other side surface of the pallets conveyed in the front-rear direction.