JPS6029400Y2 - Automatic pallet exchange device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic exchange device for pallets on which workpieces are attached in various machine tools such as hammer machining centers and transfer machines.

Automatic pallet changing devices (AWC) are used in various machine tools such as machining centers to improve the efficiency of workpiece replacement.The automatic pallet changing device (AWC) is used to improve the efficiency of workpiece replacement. This is to replace the .

As shown in Fig. 1, the conventional automatic pallet exchange device (■) has the base end of an arm 01 pivoted to the machine tool (■) side, and the tip end of which moves up and down on the side of the table of the machine tool (■) using a fluid pressure cylinder (02). The two pallets 03a and 0
3b is arranged on the arm 01 so that it can be moved forward and backward by a hydraulic cylinder 05. When the pallet 03a on the table 06 and the pallet 03b on the fork 04 are exchanged, the pallet 03a on the table 06 is moved onto the fork 04. When the arm 01 is lowered, the fork 04 moves forward in the direction of arrow A in the figure, and the arm 0
1 by the fluid pressure cylinder 02, the fork 04
The pallet is replaced by moving the pallet up and down in the direction of the arrow, using the movement of the arm to move up and down and the fork to move forward and backward.

In such an automatic pallet exchange device, the pallet with the workpiece attached is lifted by the entire fork, which makes the mechanism complicated and increases the cost.

Furthermore, since the arm swings when lifting the pallet, the posture becomes unstable, which also poses a safety problem.

The present invention eliminates these conventional drawbacks, stabilizes the posture when lifting the pallet, increases safety, and simplifies the mechanism, making maintenance easier and reducing costs. Automatic pallet replacement The purpose is to provide equipment.

The structure of the present invention, which is distantly related to such an object, is an automatic pallet exchange device that is attached to a machine tool and exchanges a pallet on which a processed workpiece is attached. A pallet exchange member for placing two pallets along the moving direction of the table is located on the side of the table and is movable forward and backward with respect to the table.

Hereinafter, one practical example of the present invention will be explained in detail based on the drawings.

Figures 2a and 2b show the automatic pallet exchange device of the present invention together with a machine tool, where a is a plan view and b is a front view. It was established.

FIGS. 3 to 5 show an extract of the automatic pallet exchange device I. FIG.

A fixed guide 1 is fixed horizontally via a bracket 3 attached to the machine body 2, and on this fixed guide 1 is a U-shaped notched loading section 5a so that two pallets 4, 4a can be stacked side by side. , 5b, a pallet exchange member 5 having
(hereinafter referred to as fork) is provided, and guide rollers 6.6a attached to both left and right ends of the fork 5 are connected to the fixed guide 1.
It can move forward freely by rolling along the upper end surface and inner surface.

Moreover, the driving part of this fork 5 is shown in FIGS. 3 and 4.
As shown in the figure, a support 8 is fixed to the tip of a fluid pressure cylinder 7 attached to a bracket 3, and gears 9, 9a are attached to this support 8 via a shaft 10 and a bearing 11.

A moving rack 12 that meshes with one of the gears 9
is attached to the central lower surface of the fork 5, and the gear 9a is divided into two pieces so as to sandwich the gear 9, and a fixed rack 13 that meshes with the gear 9a is attached to the upper end surface of the bracket 3.

Therefore, by expanding and contracting the rond of the hydraulic cylinder 7, the fork 5 is
can move forward and backward.

Furthermore, in order to position the pallets 4, 4a on the fork 5, as shown in FIG. A link 15 having a spherical tip is inserted into the lower part of the positioning pin 14, and the base end is supported coaxially with the pinion 16.

This pinion 16 meshes with a rack connected to a hydraulic cylinder 17 for positioning.

Therefore, the pinion 16 rotates as the fluid pressure cylinder 17 expands and contracts, the link 15 swings, and the positioning pin 14 can be moved up and down for positioning.

In the figure, 18 is a table on the side of the machine body 2, and 19 is a lifting mechanism for a pallet provided on the table 18. Both may be conventionally used sliding mechanisms or lifting mechanisms, and their explanations will be omitted.

Next, the operation of the device of the present invention is shown in FIG. 6a.

b - In the first hard drawing, 20 is a machined pallet on which the workpiece has been machined, and 21 is a next processing bullet for processing the workpiece next.

During processing of the workpiece, as shown in FIGS. 6a and 6b, the processed pallet 20 is placed on the table 18 on the machine tool side, and the pallet lifting mechanism 19 is in the retracted position, that is, the pallet 20 is moved to the table. 18, and the fork 5 is also in the retracted position.

Further, one loading section 5a of the fork 5 is empty, but the next processing bullet 21 is placed on the other loading section 5b.

Next, when the machining of the workpiece on the processed pallet 20 is completed, the table 18 moves in the direction of arrow A in the figure due to the operation of the machine tool, and as shown in FIGS. 7a and 7b, the machined pallet 20 is stopped at a position facing the empty loading portion 5a of the fork 5.

Thereafter, as shown in FIGS. 8a and 8b, the processed pallet 20 is unclamped from the table 18 and is raised horizontally by the pallet lifting mechanism 19.

In this state, as shown in Fig. 9a and b, the fork 5
moves forward toward the table 18, and the empty loading section 5a is located below the processed pallet 20, and the next processing bullet 21 is also located on the machine tool side.

When the advance of the fork 5 is completed, FIG. 10a.

As shown in b, the pallet lifting mechanism 19 places the lowered pallet 20 on the fork 5.

Next, the table 18 moves in the direction of the arrow in the figure and is located below the next processing bullet 21 loaded on the fork 5.

When this positioning is done, as shown in FIGS. 11a and 11b, the pallet lifting mechanism 19 rises again to lift the next processing valet 21, so that the fork 5 can be moved back.

After this, as shown in Fig. 12a and b, fork 5
is moved backward, and the next processing bullet 21 is lowered onto the table 18 and clamped, completing the replacement.

In this way, the work on the next processing bullet 21 is processed, the work is removed from the processed pallet 20, and an unprocessed work is attached to prepare for the next pallet exchange.

Then, by repeating the same operations as described above, the work can be continued.

As described above in detail with the embodiments, according to the present invention, the swing arm of the pallet lifting mechanism is not required, making it possible to make the entire apparatus compact and to reduce costs.

Furthermore, since the pallet can be moved in a horizontal state without swinging, safety can also be improved.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional automatic pallet exchange device, Figure 2
Figures a, b to 5 show an embodiment of the automatic pallet exchange device of the present invention, and Figures 2 a and b are shown together with a machine tool, where a is a plan view, b is a front view, and Figure 3 is a plan view. Figure a,
b is an automatic pallet exchange device, a is a plan view, b is a front view, Fig. 4 is a view taken along the line A-A in Fig. 3a, Fig. 5 is a detailed view of the positioning pins, Fig. 6a, b to explanatory diagrams of the first factor automatic exchange operation; each figure a is a schematic plan view, and each figure is a schematic front view; In the drawing, ■ is an automatic pallet exchange device, ■ is a machine tool,
1 is a fixed guide, 2 is a machine body, 3 is a bracket, 4,
4a is a pallet, 5 is a pallet replacement member (fork),
5at5b is a loading section; 6; 6a is a guide roller, 7 is a fluid pressure cylinder, 8 is a support, 9, 9a are gears, 10 is a shaft, 11 is a bearing, 1
2 is a movable rack, 13 is a fixed rack, 14 is a positioning pin, 15 is a link, 16 is a pinion, 17 is a fluid pressure cylinder for positioning, 18 is a table on the machine body 2 side, 1
9 is a lifting mechanism, 20 is a processed pallet, and 21 is a next processed pallet.

Claims (1)

[Scope of utility model registration request] In an automatic pallet exchange device that is attached to a machine tool and exchanges a pallet on which a processed workpiece is attached and a pallet on which an unprocessed workpiece is attached, a mechanism is provided for vertically raising and lowering the pallet on the table of the machine tool, and An automatic pallet changing device characterized in that a pallet changing member for placing two pallets along the moving direction of the table is located on the side of the table and is freely provided in a 1.7 base pair on the cheaply. .