JPH0410995Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a pallet transfer device that transfers pallets between a pallet changer and a carrier vehicle.

<Prior art> A first pallet in which a first guide member for guiding a pallet is installed on a base, and the pallet is carried in and out between a table of a machine tool installed beside the base and the first guide member. Install loading/unloading equipment,
A second guide member for guiding the pallet was installed on the conveyance vehicle approaching the side of the base, and a second pallet loading/unloading device was installed for loading/unloading the pallet between the first guide member and the second guide member. When the pallet transfer device carries the pallet on the first guide member to the second guide member, it is necessary to release the engagement between the pallet hook and the engagement member of the first pallet carry-in/out device. Therefore, conventionally, the first
The entire pallet loading/unloading device is released by a relief cylinder device in a direction perpendicular to the pallet loading/unloading direction, and the engagement between the pallet hook and the engaging member of the first pallet loading/unloading device is released.

<Problems to be solved by the invention> When pallets are transferred between multiple pallet changers and transport vehicles, it is necessary to provide the relief cylinder device in the first pallet loading/unloading device of each pallet changer. Therefore, a large number of cylinder devices are required, and a sequence control device for controlling the operation of these cylinder devices is required, resulting in a complicated structure and high cost.

<Means for solving the problem> The present invention was made to solve the above-mentioned problem.
The first pallet loading/unloading device for loading and unloading pallets between guide members includes a movable member that is moved along the first guide member by a drive device, and a hook that is fixed to the movable member and fixed to the side surface of the pallet. a contact member that contacts the surface of the hook on the side opposite to the transport vehicle; a claw pivotally supported on a movable member so as to be able to open and close at positions where the hook contacts and does not contact the surface of the transport vehicle; A pusher device is installed on a conveyance vehicle that approaches the side of the base, and opens and closes the claws by overcoming the springs.

<Operation> When the movable member is moved along the first guide member by the drive device, pallets are carried in and out between the table of the machine tool and the first guide member. When loading and unloading pallets between the first and second guide members, first use the pusher device to open the claws to a position where they do not contact the pallet hooks, and then use the second pallet loading and unloading device to move the pallets. Carry out loading and unloading.

<Example> An example of the present invention will be described below based on FIG. 1. 10 is a table of a machining center (machine tool), 20 is a pallet changer installed next to the table 10, and 50 is a carrier that is movable in the A direction and placed next to the pallet changer 20. be.

In the pallet changer 20, a rotary table 22 is installed on a base 21 installed on the floor so as to be able to rotate around a vertical axis P, and a lower surface of a pallet 60 is guided and supported on both sides of the vertical axis P on this rotary table 22. A first guide member 23 is installed. The first guide member 23 is made up of a guide roller 24 that guides the pallet 60 in the left-right direction, and a support roller 25 that supports the pallet 60. Furthermore, two sets of first pallet loading/unloading devices 30 are installed on both sides of the first guide member 23 on the rotary table 22.

The first pallet loading/unloading device 30 includes a table 10 and a first guide member 23 on the table 10 side.
The pallets 60 are carried in and out between them.
In this structure, as shown in FIG.
is installed parallel to the first guide member 23, and this third
An intermediate member 32 is movably guided by the guide member 31, and a movable member 33 is movably guided by the intermediate member 32 in the same direction as the intermediate member 32. The movement of the movable member 33 is achieved by fixing a movable rack 34 to the lower surface of the movable member 33, pivoting a pinion 35 that engages with the movable rack 34 to the intermediate member 32, and moving a fixed rack 36 that engages the pinion 35 to the third guide member 31. The tip of the piston rod of a cylinder device (drive device) 37 installed parallel to the third guide member 31 is connected to the intermediate member 32 via a connecting plate 37a.
This is done by moving the intermediate member 32 and transmitting the movement of the intermediate member 32 to the movable rack 34 via the pinion 35. The movable rack 34, fixed rack 36 and pinion 35 cause the movable member 33 to move at twice the speed and with twice the stroke of the intermediate member 32. On the movable member 33 is a vertical axis P of a hook 61 fixed to the side surface of the pallet 60.
A contact member 36 that contacts the side surface is fixed, and a claw 3 that contacts the surface opposite to the vertical axis P of the hook 61 is fixed.
9 is pivotally supported, and the hook 61 is connected to the contact member 38 and the claw 3.
9, it is sandwiched. This claw 39 is the first
By turning counterclockwise in the figure, it can be released to a position where it does not come into contact with the hook 61.
By passing a spring 41 between a pin 40 fixed to the movable member 33 and the pawl 39, the pawl 39 is biased to a position where it comes into contact with the hook 61. Further, on the movable member 33, the actuating member 42 is attached with two bolts 43.
The actuating member 42 is guided parallel to the moving direction of the movable member 33 through a groove 44, and one end of the actuating member 42 comes into contact with the pawl 39, and the other end comes into contact with a rod of a pusher device to be described later.

A second guide member 51 that guides and supports the pallet 60 is installed parallel to the first guide member 23 on the transport vehicle 50, and a first guide member 51 is provided inside the second guide member 51.
The pallet 6 is moved by the feed table 52 by the second guide member 51.
A second feed table 53 is guided to the first feed table 52 in parallel to the moving direction of the first feed table 52. As shown in FIG. 3, the movement of the second feed table 53 is achieved by placing a feed motor 54 on the transport vehicle 50, and applying rotation of the feed motor 54 to the lower surface of the first feed table 52 via a pinion 55. The rack 56 is transferred to the first feed platform 52.
This is done by transmitting the movement to the second feed base 53 via the sprocket 57 and chain 58.
The sprocket 57 is installed on the first feed table 52, and one end of a chain 58 that meshes with the sprocket 57 is connected to a fixed part 59 of the conveying carriage 50, and the other end is connected to the second feed table 53. The second sprocket 57 and chain 58
The feed table 53 is moved at twice the speed and twice the stroke of the first feed table 52. The sprocket 57 and chain 58 move the second feed table 53 to the left side, and an unillustrated sprocket and chain that move the second feed table 53 to the left side are installed on the right side of the first feed table 52. . A feed engagement rod 80 that engages with an engagement hole 62 formed in the center of the lower surface of the pallet 60 is guided in the second feed base 53 so as to be movable in the vertical direction. It is moved up and down by a motor (not shown) installed on the stand 53 via a pinion (not shown) and a rack (not shown). The first feed base 5 mentioned above
2. A second pallet loading/unloading device 81 is constituted by the second feeding table 53, the rack 56, the sprocket 57, the chain 58, and the feeding engagement rod 80.

A pusher device 70 is installed on the transport vehicle 50 at a position corresponding to the operating member 42 of the first pallet loading/unloading device 30, with the first guide member 23 and the second guide member 51 corresponding to each other. This pusher device 70 is a support stand 7 installed on a carrier vehicle 50.
1, a guide bar 72 and a ball screw 7 installed on this support base 71 in parallel with the second guide member 23.
3, a guide bush 74 guided by a guide bar 72, and a nut 7 screwed into a ball screw 73.
5, a connecting member 76 that connects the guide bush 74 and the nut 75, a rod 77 connected to the connecting member 76 in parallel to the guide bar 72, and a motor 78 that rotationally drives the ball screw 73.

Next, the operation will be explained based on the above-described configuration. When the machining of the workpiece placed on the pallet 60 on the table 10 is completed, the movable member 33 of the first pallet loading/unloading device 30 is moved while the first guide member 23 on which the pallet 60 is not placed is on the table 10 side. Move it to the table 10 side. Raise the table 10 and attach the hook 61 of the pallet 60.
The contact member 38 and the claw 39 are engaged with each other, and the movable member 3
3 is moved in a direction away from the table 10, a pallet 60 on which processed workpieces are placed is placed on the first guide member 23. Next, the pallet 60 with the unprocessed workpiece placed on the first guide member 23 on the right side is indexed toward the table 10 by rotating the rotary table 22, and the pallet 60 with the processed workpiece placed on it is indexed to the opposite side of the table 10. Split to the side. When the movable member 33 on the table 10 side moves toward the table 10, the pallet 60 is placed on the table 10, and the table 10 is lowered to release the engagement between the hook 61, the contact member 38, and the claw 39. Then, the movable member 33 moves to the side opposite to the table 10.

When the carrier 50 without the pallet 60 placed on the second guide member 51 is placed next to the base 21,
The first feed table 52 of the second pallet loading/unloading device 81
Then, the second feeder 53 moves toward the base 21 and raises the engagement rod 80 to a position where it engages with the engagement hole 62. Thereafter, the rod 77 moves forward toward the actuating member 42 and releases the pawl 39 to a position where it does not engage the hook 61. In this state, the first feed stand 52 and the second feed stand 53 are moved to the conveyance truck 50 side, and the pallet 60 with the processed workpiece placed on the second guide member 51
At the same time as loading the rod 77, the rod 77 is moved backward.

When the carrier 50 carrying the pallet 60 carrying unprocessed workpieces is placed next to the base 21, the rod 77 moves forward toward the actuating member 40, releases the pawl 39, and then moves to the first feed platform 52. Then, the second feed table 53 moves toward the base 21 side. As a result, the pallet 60 is placed on the first guide member 23 with the claw 39 retracted to a position where it does not interfere with the hook 61. At the same time, when the rod 77 is moved backward, the claw 39 turns clockwise by the spring 41 and engages the hook 61, so that the pallet 6 carried into the first guide member 23 is
Lock 0. Subsequently, the engaging rod 80 is lowered to move the first feed table 52 and the second feed table 53 toward the carrier vehicle 50.

In the above embodiment, the ball screw 73 is used to move the rod 77 forward, but a cylinder device may be used to move the rod 77 forward and backward. We also described an example of application to a pallet changer using a rotary table.
It can also be applied to a shuttle-type pallet changer in which two sets of first guide members 23 are installed in parallel.

<Effects of the invention> As described above, in the present invention, the first pallet loading/unloading device for loading/unloading pallets between the table of the machine tool and the first guide member on the base can a movable member that is moved along a guide member; a contact member that abuts a surface of a hook fixed to the movable member and fixed to a side surface of the pallet on the side opposite to the transport vehicle; and a contact member that contacts the surface of the hook on the transport vehicle side. It consists of a claw pivoted on a movable member so that it can be opened and closed in a contacting position and a non-contacting position, and a spring that urges this claw to a contacting position. Since the structure is equipped with a pusher device that opens and closes the claws by overcoming the spring, the engagement between the hook and the claws can be released by a single pusher device installed on the transport vehicle, which reduces the need for a drive device and reduces the structure. This simplifies the process and has the effect of reducing costs.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a plan view of the pallet delivery device, FIG. 2 is a partial sectional view showing the first loading/unloading device, and FIG.
The figure is a simplified side view showing the second loading/unloading device. DESCRIPTION OF SYMBOLS 10... Table, 20... Palette changer, 21... Base, 23... First guide member, 30
...First pallet loading/unloading device, 33...Movable member, 38...Abutment member, 39...Claw, 41...Spring, 50...Transportation cart, 51...Second guide member,
60... Pallet, 61... Hook, 62... Engaging hole, 70... Pusher device, 77... Rod,
80...Feed engagement rod, 81...Second pallet loading/unloading device.

Claims (1)

[Scope of utility model registration request] A first guide member for guiding the pallet is installed on the base, and a first pallet loading/unloading device is installed for loading/unloading the pallet between the table of the machine tool installed beside the base and the first guide member. death,
A second guide member for guiding the pallet was installed on the conveyance vehicle approaching the side of the base, and a second pallet loading/unloading device was arranged for loading/unloading the pallet between the first guide member and the second guide member. In the pallet transfer device, the first pallet loading/unloading device includes a movable member that is moved along a first guide member by a drive device, and a transport carriage of hooks fixed to the movable member and fixed to the side surface of the pallet. an abutting member that abuts the opposite surface; a pawl that is pivotally supported by a movable member so as to be able to open and close at a position that abuts and does not abut the surface of the hook on the transport vehicle side; 1. A pallet transfer device, comprising a biasing spring, and a pusher device is installed on the carrier vehicle to open and close the claws by overcoming the springs.