JP2923149B2 - Automatic transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transfer / transfer device used for transferring a container containing a work in a production factory or the like.

[0002]

2. Description of the Related Art An example of a conventional unmanned transfer truck will be described with reference to FIG. 5. Reference numeral 11 denotes a transfer truck, which transfers a pallet 16 and a mold loaded thereon from a certain station to another machine side. It is transported to a position before the receiving table 17. At this time, the flange of the wheel 12 attached to one side of the carrier 11 prevents the carrier 12 from being displaced in a direction perpendicular to the traveling direction. When the positioning of the transport vehicle 11 with respect to the receiving table 17 is completed, the pins 31 are lowered, and only the two motors 27 on the receiving table 17 side among the four motors 27 of the transport vehicle 11 are rotated. Thereby, only the first transfer table 19 moves to the receiving table 17 side. On the other hand, the movement of the second transfer table 20 is restricted by the other pin 31, and the second transfer table 20 remains locked. Here, the reason why the second carrier 20 is kept stopped is that the center of gravity of the carrier 11 is positioned as close to the center as possible so as to secure the stability of the carrier 11 during pallet transfer.

[0003] Simultaneously with the movement of the first carrier 19, the pins 39 attached to the carriers 19, 20 are lowered and the motors 36 of the carriers 19, 20 are activated. As a result, the pinion 35 rotates, the rack 34 meshed with the pinion 35 moves, and the pallet 16 moves to the receiving table 17 side. In this case, since the height of the lower surface of the receiving plate 33 of the pallet 16 matches the height of the upper surface of the roller 40 of the receiving table 17, the receiving plate 33 of the pallet 16 is moved by the plurality of rollers 40 of the receiving table 17. Received. Thus, the pallet 16 is smoothly pushed out toward the receiving table 17.
Here, as the pallet 16 moves, the second transfer table 2
The pinion 35 on the side of the first transfer table 20 is separated from the rack 3 by the pinion 35 on the zero side.
4, the pallet 16 is transferred to the receiving table 17.

When the pallet 16 moves to a predetermined position,
The pallet 16 is positioned by means not shown. Next, the dies loaded on the pallet 16 are unloaded from the pallet 16 by means of another machine (not shown).

[0005]

Conventional devices generally have the following problems. 1) Two sets of driving units for traversing and transferring in the transporting trolley,
Further, since the control unit is provided, a large space is required and the weight is increased. 2) A trolley-type or reel-type wiring device is required for a power source for power to be supplied to the drive unit of the transport trolley and a control circuit required for control. 3) The apparatus is complicated due to the above 1) and 2), minimizing the size and weight of the apparatus, and hindering the improvement of the moving speed of the carrier, and increasing the cost and power cost.

The present invention has been developed in order to address such a problem, and eliminates the drive unit and the control unit loaded on the transport vehicle and drives the traversing and transfer operations by a chain from outside the transport vehicle. The purpose is to do.

[0007]

The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 4 corresponding to the embodiment.
A transport vehicle 50 traversing orthogonally between the two;
A traveling chain 70X that engages with a first driving sprocket 63X and a first driven sprocket 64X provided at both ends of the traveling rail 60 and connects the end to the front and rear sides of the carrier 50; The second driving sprocket 63Y and the second driven sprocket 64Y provided coaxially with the first driving sprocket 63X and the first driven sprocket 64X engage with the first driving sprocket 63X and the first driven sprocket 64X, and are fixed to one shaft of a bevel gear unit 55 provided on the carrier 50. An endless transfer chain 70Y that engages with a given sprocket 56B,
The second drive sprocket 6 of the transfer chain 70Y
A drive motor 61 having a rotating shaft for fixing the first driving sprocket 63X of the traversing chain 70X via a clutch brake 62 and attached to the traveling rail 60; 55
And a drive conveyor 52 driven on the carrier 50 via a sprocket 56A fixedly mounted on the other shaft.
The clutch brake 62 is closed, and the traversing chain 70X and the transfer chain 70Y are simultaneously driven to traverse the transport trolley 50.
2, the drive conveyor 52 is driven by driving only the transfer chain 70Y while the traversing chain is stationary.

[0008]

According to the present invention, in order to traverse the carriage by the above means, the clutch brake is turned on, the first drive sprocket for traverse is connected to the drive motor, and the drive motor is rotated. This can be done by turning off the clutch brake, and when stopped, the stopped state is forcibly held by the brake of the clutch brake. During this traversing operation, the transfer chain also moves, but since the speed is the same as that of the traverse chain, the transfer chain is relatively stationary with respect to the carrier, and does not rotate the bevel gear unit. .

In order to drive the drive conveyor, if the drive motor is rotated while the carrier is stopped, only the transfer second drive sprocket rotates, so that the bevel gear unit rotates. The roller engaged with the output shaft of the bevel gear unit via a chain rotates.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing the concept of the entire apparatus. In FIG. 1, reference numeral 140 denotes a container containing a small work made by, for example, an injection molding machine or a forming press, and 41 denotes a plurality of rows (two rows in the illustrated example). A conveyor 42 is a storage conveyor composed of a plurality of rows (five rows in the illustrated example), and 50 is a transport trolley. The transport trolley 50 receives the container 140 supplied from one of the supply conveyors 41 and stores the container 140 in the storage conveyor 4.
2 is a transport vehicle for passing to any one of the rows and temporarily storing there. The transport vehicle 50 travels on two rails 60A, 60B arranged in a traversing direction (hereinafter, referred to as an X direction) connecting the plurality of supply conveyors 41,
A drive conveyor 52 capable of transferring the container 140 in a transfer direction (hereinafter, referred to as a Y direction) orthogonal to the X direction is provided at an upper portion.
It has. Reference numeral 80 denotes a limit switch provided on the rail 60A (or the rail 60B) for preventing the carriage 50 from overrunning. Reference numerals 81 and 82 denote supply conveyors 41.
And a limit switch provided on the storage conveyor 42 for knowing that the transport vehicle 50 has exchanged the container 140.

The structure of the transfer device will be described with reference to FIGS. 2 is a top view of the transfer device, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a sectional view taken along line BB of FIG. Mainly referring to FIG. 2 and FIG. 3, the transport trolley 50 is composed of a trolley frame 51 and a drive conveyor 52, and the trolley frame 51 is provided with two wheels 53A and 53B, and each of the rails 6
It is on 0A and 60B. As shown in FIG. 4, the wheel 53A inclines a roller having two V-grooves so as to sandwich the upper corner of the square pipe rail 60A from both sides, thereby preventing displacement in the Y direction. One wheel 53B
Is a cylindrical roller without a flange, which can be freely moved in the Y direction, and relaxes the accuracy requirement of the parallelism between the rails 60A and 60B. The drive conveyor 52 on the upper part of the transport carriage 50 includes one drive roller 54A and a plurality of (six in the illustrated example) driven rollers 54B. The drive roller 54A is attached to the carriage frame 51 as shown in FIG. Sprocket 56A fixed to the output shaft of fixed bevel gear unit 55
The driven roller 54B is driven to rotate via the chain by the driving roller 54A. 61 is a driving motor, 62
Are clutch brakes, all of which are fixed to the rail 60A via a bracket, and the input shaft of the clutch brake 62 is directly connected to the shaft of the motor 61. 63X and 63Y are first and second driving sprockets of the same size. The first driving sprocket 63X is rotatably fitted to the rotation shaft of the motor 61 and is provided with the clutch brake 6X.
When the clutch brake 62 is ON, it is connected to the rotation shaft of the motor 61 and rotates together. When the clutch brake 62 is OFF, the clutch brake 62 is released from the rotation shaft of the motor 61 and is released by the brake of the clutch brake 62. The second driving sprocket 63Y is held so as not to rotate and is fixed to the rotation shaft of the motor 61.

64X and 64Y are first and second driven sprockets of the same size, 65 is a bracket, 66 is a rotating shaft, 67 is a rotary encoder fixed to the bracket 66, and the rotating shaft 66 is a rotatable bracket. The first driven sprocket 64X is supported by a rotating shaft 66.
The second driven sprocket 64 is rotatably fitted on the
The axes of Y and the rotary encoder 67 are fixed to the rotation shaft 66. 70X is a traversing chain. The traversing chain 70X is engaged with a first driving sprocket 63X and a first driven sprocket 64X.
And 70Y is a transfer chain, the transfer chain 70Y is annular and has a second driving sprocket 63Y, a second driven sprocket 64Y, and the bevel gear. It is engaged with a sprocket 56B fixed to the input shaft of the unit 55. Reference numeral 72 denotes an idler sprocket for increasing the winding angle of the transfer chain 70Y with respect to the sprocket of the bevel gear unit 55 and for adjusting the tension of the transfer chain 70Y. The illustration of the anti-slack rails or rollers of both chains is omitted.

The operation of the transport device having the above configuration will be described.
When the container 140 in the supply conveyor 41 is filled with the work, a signal is sent from a sensor on the supply conveyor side to a control device (not shown), and the control device causes the carrier 50 to move to the position of the supply conveyor 41. Instruct (all subsequent operations are also performed according to the instruction of the control device, but the description is omitted). The movement of the carriage 50 in the X direction is performed as follows. The clutch 61 is turned on to start the motor 61. As described above, the first driving sprocket 63X is released from the brake and is directly connected to the shaft of the motor 61. The rotation of the motor 61 pulls the traversing chain 70X in the direction of the instruction to move the carriage 50. . At this time, the transfer chain 70Y moves at the same speed as the traversing chain 70X.
There is no relative movement between 0Y and the carriage 50, so that there is no effect on the sprocket 56B of the bevel gear unit 55. The position of the carrier is monitored by a rotary encoder 67 directly connected to the rotating shaft 66 of the first driven sprocket 64X, and stops when a target position is reached by a signal from the rotary encoder 67. Next, the supply conveyor 41 and the drive roller 54 of the drive conveyor 52 of the transport vehicle are used.
A and the driven 54B rotate, and the container 140
Moved to 0. At this time, the driving roller 5 of the transport carriage 50
The rotation of 4A and the driven roller 54B is performed as follows. When the drive motor 61 is started, the second drive sprocket 63Y rotates and the transfer chain 70Y moves to rotate the sprocket 56B of the input shaft of the bevel gear unit 55, and changes the direction by 90 ° to drive the drive roller 54A to the output shaft.
The driving roller 54A rotates the driven roller 54B via a chain. The transfer of the container 140 is completed by the limit switch 81 provided on the supply conveyor 41 side.
Then, the motor 61 is stopped. Container 140
Is loaded on the transport trolley 50, moves in the X direction in the same manner as described above, moves to the position of the pre-programmed empty storage conveyor 42, and drives the drive conveyor 5 of the transport trolley 50.
2 and the rollers of the storage conveyor 42 are rotated to rotate the container 1
Transfer 40 to storage conveyor 42. Storage conveyor 42
The end of transfer to the storage conveyor is notified by a limit switch 72 provided on the storage conveyor 42 side. The rotation of the conveyor rollers is performed in the same manner as described above.

[0014]

As described above, according to the present invention, the carriage is driven by the traversing chain driven by the first driving sprocket fixed to the rotating shaft of the driving motor mounted on the traveling rail via a clutch brake. The drive conveyor on the carrier is driven by a transfer chain driven via a second drive sprocket fixed to a rotation shaft of a drive motor, and has the following effects. 1) Since there is no traveling drive device and control box in the transport trolley, it is possible to reduce the size and weight of the trolley. 2) Wiring for a driving power supply and a control circuit is not required, and a complicated wiring device such as a trolley type or a reel type is eliminated, and the design is simplified. 3) Cost reduction can be achieved by reducing the size and weight. 4) The acceleration performance of the bogie is improved by the weight reduction, and the cycle time is shortened. 5) Since the return chain passes through the inside of the square pipe, it has a dustproof effect.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing one embodiment of the present invention.

FIG. 2 is a plan view of the transport vehicle.

FIG. 3 is a view taken in the direction of arrows AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a perspective view of a conventional example.

[Explanation of symbols]

 41, 42 Conveyor 50 Conveyor truck 52 Drive conveyor 55 Bevel gear unit 56A Sprocket 56B Sprocket 60 Rail 61 Drive motor 62 Clutch brake 63X First drive sprocket 63Y Second drive sprocket 64X First driven sprocket 64Y Second driven sprocket 70X Crossing chain 70Y Transfer chain

Claims (1)

(57) [Claims] 1. A transport vehicle that crosses a plurality of conveyors in series at right angles, and engages with a first driving sprocket and a first driven sprocket provided at both ends of a traveling rail of the transport vehicle and ends the transport vehicle. And a second driving sprocket and a second driven sprocket provided coaxially with the first driving sprocket and the first driven sprocket of the traversing chain. An endless transfer chain engaged with a sprocket fixed to one shaft of a bevel gear unit provided; and the second drive sprocket of the transfer chain fixedly mounted, and the first drive of the traversing chain. A drive motor having a rotating shaft for fixing a sprocket via a clutch brake and attached to the traveling rail, and the other of the bevel gear unit A drive conveyor driven on the carriage through a sprocket fixed to a shaft, closing the clutch brake and simultaneously driving the traversing chain and the transfer chain to traverse the carriage. And an automatic transport device for driving the drive conveyor by driving only the transfer chain in a state where the clutch brake is opened and the traversing chain is stationary.