JP2524927B2 - Conveyor retention prevention device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor stagnation prevention device which is suitable for conveying a thin object to be conveyed.

[0002]

2. Description of the Related Art For example, in a drum can manufacturing line, the body of a drum can and its top plate and bottom plate are stored and managed in a warehouse, and if necessary, they are delivered from the warehouse.
There are some that were designed to be completed as drums. In such a line, a roller conveyor is provided to convey the top plate and the top plate used as the bottom plate toward the warehouse, and the top plate can be conveyed to the entrance.

Further, a stopper capable of selectively projecting from below is provided between the rollers in front of the storage port so that the top and bottom plates to be conveyed can be sent to the cart riser one by one as appropriate. In this cart riser, for example, a chain that is driven so as to circulate in the vertical direction is provided with dogs that support the top plate in a predetermined pitch so that the top plate can be supported in multiple layers. It can be one.
When the stopper is lowered, the top plate is sent out to the cart riser side, and the top plate is forcibly pulled in by the chain conveyor provided under the cart riser, and the dog is rolled up, so that the chain conveyor The top plate can be pulled up from above.

By the way, the top plate is formed into a flat convex shape by press working or the like, and its flange portion may be deformed due to some cause such as hitting a fixed object during transportation. In some cases, the top plate sent out from the stopper part cannot reach the cart riser because the deformed part of the flange part is caught by the roller or the like.

When the top plate is caught as described above, conventionally, an operator gently presses the top plate with a gold rod or the like to prevent the top plate from staying on the roller conveyor. However, when the above-mentioned worker is required, there is a problem that it cannot be automated and the work becomes complicated.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the main object of the present invention is to provide a conveyor capable of automatically preventing stagnation in a conveyor device for carrying an object to be conveyed. It is to provide a retention prevention device.

[0007]

According to the present invention, there is provided a conveyor for carrying an object to be conveyed, and a first detection sensor provided for detecting passage of the object to be conveyed. And a second detection sensor provided to detect passage of the transported object downstream of the first detection sensor and a transported object retained between the two detection sensors selectively. And a delivery mechanism provided to deliver the first detection sensor and the transported object that has passed the first detection sensor does not pass the second detection sensor until a predetermined time elapses thereafter, the delivery mechanism is operated to cause retention. It is achieved by providing a conveyor stagnation prevention device, characterized in that it has control means for automatically preventing it.

[0008]

With this configuration, it can be determined that the transported object has stayed between the first and second detection sensors based on the detection results of the both detection sensors within a predetermined time, and it can be determined that the transported object has stayed. When detected, the transported object can be automatically delivered by the delivery mechanism.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a layout diagram showing the entire cart riser system for a top plate of a drum to which the present invention is applied. This cart riser system is shown in Figure 1.
As shown in the upper side of the figure, a plurality of units are arranged in two rows, a three-dimensional automatic warehouse 1, a circulation conveyor 2 connected to the units on both ends of one row, and a transfer on the circulation conveyor 2. It is possible and has a plurality of magazine racks 3 provided so as to be stored in the three-dimensional automatic warehouse 1,
A transfer roller conveyor 4 connected to a top plate manufacturing apparatus (not shown), and a top plate 5 on the transfer roller conveyor 4 are transferred to a magazine rack 3 placed at a standby position on the circulation conveyor 2. The cart riser 6, the carry-out roller conveyor 7 connected to a drum can manufacturing device (not shown), and the top plate 5 are transferred from the magazine rack 3 placed at the exit side standby position on the circulation conveyor 2 to the carry-out roller conveyor 7. It has a decartizer 8 for mounting. In addition, the Cart Riser 6 and the Decatur Riser 8 are
Each transfer device 9 and 10 for transferring the top / bottom plate 5 to and from the corresponding magazine rack 3 is attached to each. Further, a stacker crane 11 is provided between the three-dimensional automatic warehouse 1, and the magazine rack 3 is put in and taken out from each unit of the three-dimensional automatic warehouse 1 by the stacker crane 11.
The drive of each of these devices is controlled by a sequencer or the like, and the number of storage / removal of the top plate can be automatically managed.

As shown in FIG. 2, the cart riser 6 is provided in an upright state between the carry-in roller conveyor 4 and the circulating conveyor 2, and has a pair of left and right columns. An endless annular belt 12 is hung around pulleys provided above and below each pair of stanchions, and dogs 13 having an L-shaped cross section hung between paired chains on the left and right are equally pitched in the circumferential direction. Have at intervals. The dogs 13 on the left and right are respectively arranged so as to be located on the same horizontal plane in the vertical direction. Further, although one belt 12 is circumferentially driven by the motor 14 attached to one of the columns, the left and right pulleys are arranged such that the gearbox 1 provided on the magazine rack 3 side.
They are connected to each other via 5 so as to be able to rotate in opposite directions and to be synchronized with each other, and the inner portions of the cart riser 6 of the left and right dogs 13 are driven in the ascending direction in synchronization with each other.

As shown in FIG. 3 which is a schematic diagram showing the procedure for conveying the top plate 5 below the cart riser 6, the top plate 5 conveyed on the carry-in roller conveyor 4 is
A chain conveyor 1 provided below the cart riser 6
A stopper 17 is provided in the vicinity of the downstream end of the roller conveyor 4 so as to be fed one by one onto the conveyor 6, and can be selectively retracted in the vertical direction with respect to the conveying surface thereof. This stopper 17
Has, for example, two left and right rod members that are fixed to the tip of the rod of the air cylinder 18, and the controller 19 can drive the air cylinder 18 as appropriate so that the roller conveyor 4 can project and retract.

In this way, the top and bottom plates 5 conveyed on the roller conveyor 4 are conveyed one by one to the chain conveyor 16
The motor 14 of the cart riser 6 is sent to the upper side and is rotated by a predetermined amount, so that the diagonal edges of the top plate 5 placed on the chain conveyor 16 are moved to the left and right dogs 13.
The top plate 5 can be lifted upward by hooking. When the top plate 5 on the chain conveyor 16 is lifted by the dog 13, the stopper 17 is lowered to send the next top plate 5 to the chain conveyor 16. Then, the top plate 5 is supported by the dogs 13 and held in the cart riser 6 in a laminated state.

The top plate 5 extends over the upper and lower ends of the cart riser 6.
When the sheets are stacked, all the top plates 5 are pushed out by the transfer device 9 and transferred to the magazine rack 3. As shown in FIG. 2, the transfer device 9 pushes out a pair of upper and lower guide rods 21 supported by a mount (not shown) and a top plate 5 stacked in the cart riser 6 to the magazine rack 3 side. Therefore, a plate 22 that is formed to be long in the vertical direction and is supported by the projecting end of each of the guide rods 21, and an air cylinder 23 for selectively pushing out the plate 22 are provided.
It is composed of

The decartizer 8 and its associated transfer device 10 are also constructed similarly to the car riser 6 and its transfer device 9.

By the way, on the downstream side of the stopper 17 of the carry-in roller conveyor 4, as shown in FIG. 3, a first detection sensor 24 which may be, for example, a reflection type photo sensor.
The second detection sensor 25, which may be a reflection type photo sensor, is also arranged in the vicinity of the downstream end of the chain conveyor 16 on the downstream side in the conveying direction. The presence / absence of the top plate 5 conveyed on the roller conveyor 4 and the chain conveyor 16 can be detected by both of these detection sensors 24 and 25, and each detection signal is input to the control device 19. The positions of the detection sensors 24 and 25 in FIG. 3 indicate the positions in the transport direction, and do not specify the positions in the vertical and horizontal directions. That is, the light emitting and receiving type sensors may be arranged on the left and right sides of the conveyor so as to cross the top plate 5.

A claw member 26 of the pushing mechanism is provided on the downstream side of the stopper 17. This claw member 26
Is a pair of upper and lower cylinders 27, which may be a pair of upper and lower cylinders, as schematically shown in FIG.
Each of the 28 rods 27a is supported via a clevis attached to the tip of each 28a. In FIG. 4, a standby state is shown, and in this state, the upper end of the claw member 26 is
The roller conveyor 4 is held in a state of being submerged below the conveying surface. The cylinders 27 and 28 are appropriately driven by the control device 19 described above. In this way, the control means for automatically preventing the retention is constructed.

As described above, the stopper 17 descends,
When the top plate 5 that has been stopped is sent to the chain conveyor 16, a part of the edge of the flange portion 5a of the top plate 5 is deformed for some reason and caught on the roller or the frame of the conveyor. In this case, the first detection sensor 24 detects the passage of the top plate 5, but the second detection sensor 25 does not detect the top plate 5. In the present device, after the detection is performed by the first detection sensor 24, the top plate 5 reaches the standby position on the chain conveyor 16.
Even if the predetermined time required for the
When the detection plate 24 does not detect the top plate 5, it is determined that the top plate 5 is caught on the way,
Activate the pushing mechanism.

In the operating state of the pushing mechanism, as shown in FIG. 5, the claw member 26 is raised, and the upper end of the claw member 26 pushes the inner surface of the top plate 5 as shown by an imaginary line, and the top plate 5 can be pushed out. That is, the strokes of the rods 27a and 28a of the upper and lower cylinders 27 and 28 are different from the upper cylinder 2 with respect to the lower cylinder 28.
7 is designed to be longer, and each rod 27a
In the standby state in which 28a is retracted, the claw member 26 is tilted rearward obliquely (FIG. 4), and the rods 27a.
In the operating state in which 8a is projected, the claw member 26 is raised. Therefore, even when the top plate 5 sent from the roller conveyor 4 is caught on the way, the top plate 5 can be automatically pushed out and the top plate 5 can be prevented from staying.

In this embodiment, the cart riser system for the top plate of the drum can is shown. However, the object to be conveyed is not limited to the top plate, and it is conveyed on a conveyor, especially the flange part. It is applicable to a variety of conveyor devices for transporting such things.

[0020]

As described above, according to the present invention, the first and second detection sensors provided on the upstream and downstream sides in the transport direction can easily detect that the transported object is caught on the way. In that case, by operating the push-out mechanism, it is possible to automatically push out the transferred body and release the hooked state regardless of the operator, and it is possible to automatically prevent retention. The working cost can be reduced.

[Brief description of drawings]

FIG. 1 is a layout diagram showing a cart riser system for a top plate of a drum, to which the present invention is applied.

FIG. 2 is a perspective view showing a cart riser portion in a cart riser system for a roof plate.

FIG. 3 is a schematic side view showing a conveyed state of the top plate.

FIG. 4 is an explanatory view showing a pushing mechanism.

FIG. 5 is an explanatory diagram showing an operating state of a pushing mechanism.

[Explanation of symbols]

 1 three-dimensional automatic warehouse 2 circulation conveyor 3 magazine rack 4 carry-in roller conveyor 5 top plate 5a flange part 6 cart riser 7 carry-out roller conveyor 8 decartizer 9 transfer device 10 transfer device 11 stacker crane 12 belt 13 dog 14 motor 15 gear Box 16 Chain conveyor 17 Stopper 18 Air cylinder 19 Control device 21 Guide rod 22 Plate 23 Air cylinder 24 First detection sensor 25 Second detection sensor 26 Claw member 27 Upper cylinder 27a Rod 28 Lower cylinder 28a Rod

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65G 47/82 B65G 47/82 C 47/88 47/88 B // B65G 43/08 43/08 E

Claims (1)

(57) [Claims] 1. A conveyor for transporting an object to be transported,
A first detection sensor provided to detect passage of the transported object, and a second detection provided to detect passage of the transported object downstream of the first detection sensor in the transportation. A sensor, and a delivery mechanism provided to selectively deliver the transported object retained between the detection sensors,
And a control means for operating the feeding mechanism to automatically prevent retention when the transported object that has passed through the first detection sensor does not pass through the second detection sensor until a predetermined time elapses thereafter. A conveyor stagnation prevention device characterized in that