JPH0639342U - Workpiece loading / unloading device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a workpiece loading / unloading device capable of automatically loading / unloading a large heavy workpiece with a machine tool. A guide rail 3 extending in the left-right direction is installed in front of the machine tool 1, and the guide rail 3 reciprocates between a workpiece receiving position I and a front position of a jig 2 of the machine tool 1. The moving carriage 4a and the carry-out carriage 4b that travels back and forth between the front position of the jig 2 of the machine tool 1 and the workpiece receiving position 0 are guided so as to be self-propelled, and the carry-in carriage 4a and On the unloading carriage 4b, a pair of workpiece supports 9 holding the workpiece W on both sides, and between the pair of workpiece supports 9 are orthogonal to the traveling directions of the loading carriage 4a and the unloading carriage 4b. A first table 12 that can move back and forth in the horizontal direction, and a second table 12 that moves up and down on the first table 12.
The table 15 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for loading and unloading a workpiece to and from a workpiece processing position of a machine tool.

[0002]

[Prior art]

 When machining a workpiece with a machine tool, if the workpiece is relatively small, the workpiece is automatically carried in and out of the machining position.For example, a large heavy workpiece such as a rear axle housing of a large vehicle. When machining a machine with a machine tool, the work piece is carried in and out of a jig provided at the work piece processing position of the machine tool by a lifting tool and a hoist.

[0003]

[Problems to be solved by the device]

 Therefore, carrying in a large heavy workpiece requires manpower, and in particular, the worker carries out the work in such a posture that the upper half of his / her body is placed on the jig in the machine tool, which poses a risk as well as work. There was a limit to the improvement in efficiency.

An object of the present invention is to enable a large heavy workpiece to be automatically loaded and unloaded from a workpiece processing position of a machine tool.

[0005]

[Means for Solving the Problems]

 The configuration of the present invention for achieving the above object is a guide rail that is installed in front of a machine tool and extends in the left-right direction, and is guided by the guide rail so as to be self-propelled. The carry-in carriage is provided with a carry-in carriage that moves back and forth between the jig front position of the machine tool and a carry-out carriage that travels back and forth between the jig front position and the workpiece receiving position of the machine tool. And a pair of workpiece supports that both hold a workpiece on the unloading carriage, and a forward / backward movement between the pair of workpiece supports in the horizontal direction orthogonal to the traveling direction of the loading carriage and the unloading carriage. A movable first table and a second table that moves up and down on the first table are provided.

[0006]

[Action]

 With the above configuration, the work is delivered from the hoist etc. to the loading carriage located at the workpiece receiving section, and the loading carriage automatically travels to the front of the jig of the machine tool. Next, the second table is moved up to lift the workpiece, and in that state, the first table is moved forward in the jig direction to position the workpiece on the jig. After that, the second table is moved down to load the workpiece into the jig, the first table is moved backward, and the loading carriage is returned to the workpiece receiving section.

The workpiece carried into the jig is subjected to predetermined machining, and when the machining is completed, the unloading carriage located at the workpiece receiving section automatically travels to the front of the jig, and the first table is moved. It moves forward to position the second table below the workpiece on the jig that has been machined, and lifts the second table to lift the workpiece from the jig and support it on the second table. Next, the first table is moved backward to carry out the workpiece from the jig, the carrying cart is returned to the workpiece receiving section, and the workpiece on the carrying cart is conveyed to the next step.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a machine tool, and 2 is a jig installed in the machine tool 1. A guide rail 3 is installed in front of the machine tool 1 so as to extend in the left-right direction. On the guide rail 3, two carriages, a carriage 4a for carry-in and a carriage 4b for carry-out, are guided so as to be automatically driven. There is.

The carry-in carriage 4a and the carry-out carriage 4b have the same structure. The structure will be described below with reference to FIG. In the automatic traveling mechanism of the carry-in carriage 4a and the carry-out carriage 4b, the rack 6 is provided on the guide rail 3 in the extending direction of the guide rail 3, and the carry-in servomotors for traveling are provided to the carry-in carriage 4a and the carry-out carriage 4b. 7 is fixed, and the rotation shaft of the servomotor 7 is provided with a pinion 8 that meshes with the rack 6.

Further, on the carrying-in carriage 4a and the carrying-out carriage 4b, a pair of work support bases 9 for holding the work W on both sides is mounted on a support member 10 via a spring 11 so that the work support base 9 is always mounted upward. It is supported so that it can be moved up and down by urging. Although not shown in the drawing, when the workpiece W is supported by the workpiece support base 9, the workpiece support base 9 has a limit switch which is lowered by the weight of the workpiece W and has a limit switch. The servo motor 7 is operated by a support detection signal of the work W by a limit switch.

On the carry-in carriage 4a and the carry-out carriage 4b, a forward / backward movement is performed between the pair of workpiece supports 9 in a horizontal direction orthogonal to the traveling direction of the carry-in carriage 4a and the carry-out carriage 4b. A possible first table 12 and a second table 15 which moves up and down on this first table 12 are provided.

The first table 12 is guided by guide rollers 13 provided on the carry-in carriage 4a and the carry-out carriage 4b, and is operated by a forward / backward moving cylinder 14.

The second table 15 is connected to a piston rod of a vertical movement cylinder 16 fixedly mounted on the first table 12 in the vertical axis direction.

The operation of the present invention will be described with reference to FIG. As shown in FIG. 3 (A), normally, the loading carriage 4a is located on the left end of the guide rail 3 at the workpiece receiving section I, and the unloading carriage 4b is located on the right end of the guide rail 3 at the workpiece receiving section. Located in place O. Furthermore, the first table 12 is located at the retracted end, and the second table 15 is located at the descended end.

First, the work W is delivered from a hoist or the like to the work support base 9 of the loading carriage 4a located at the work receiving section I. As a result, the servomotor 7 is activated by the support detection signal of the workpiece W by the limit switch, and the loading carriage 4a automatically moves to the front of the jig 2 of the machine tool 1 as shown in FIG. 3 (B). Run and stop.

Next, the vertical movement cylinder 16 is actuated to move the second table 15 upward so as to lift the workpiece W on the workpiece support base 9, and in that state, move the first table 12 toward the jig 2. The workpiece W is moved forward and positioned on the jig 2. After that, the second table 15 is moved down to load the workpiece W into the jig 2, and the first table 12 is moved backward. As shown in FIG. 3C, the loading carriage 4a is moved to the workpiece receiving portion. Returned to I. Then, the work W loaded onto the jig 2 is started to be machined by the machine tool 1.

As a result of the processing completion signal, the carry-out carriage 4b automatically travels to the front of the jig 2 of the machine tool 1 and stops, as shown in FIG. 3 (D). Next, the first table 12 moves forward in the direction of the jig 2, and the second table 15 moves upward to move the machined workpiece W on the jig 2 from the jig 2 by the workpiece support base 9. receive. In this state, the first table 12 moves backward, and as shown in FIG. 3 (E), the carry-out carriage 4b returns to the workpiece receiving section O and conveys the workpiece W to the next step.

Between the processing of the workpiece W and the transportation of the workpiece W to the next step by the unloading carriage 4b, the unloading carriage 4a returned to the workpiece receiving section I is processed next. The workpiece W is transferred to the machine tool 1 for waiting for the next operation, and the unloading carriage 4b returned to the workpiece receiving section O transfers the processed workpiece W. After transporting to the next process, the workpiece receiving section O waits until the next workpiece unloading operation, and the above operation is repeated to continuously and automatically load the workpiece W into the machine tool 1. To do.

[0019]

[Effect of device]

 As described above, according to the present invention, the guide rail extending in the left-right direction is installed in front of the machine tool, and is guided by the guide rail so as to be self-propelled. A carry-in carriage that travels back and forth between a position and a carry-out carriage that travels back and forth between the jig front position of the machine tool and the workpiece receiving position, and the carry-in carriage and the carry-out carriage. Above, a pair of workpiece supports that hold the workpieces on both sides, and between the pair of workpiece supports that can move forward and backward in a horizontal direction orthogonal to the traveling direction of the loading carriage and the unloading carriage. Since it has a structure in which one table and a second table which moves up and down on the first table are provided, it becomes possible to automatically carry in and out when a large heavy work piece is machined by a machine tool. Directly by hoist Along with the dangerous task of loading and unloading is no longer for the ingredients, thereby improving the work efficiency.

[Brief description of drawings]

FIG. 1 is a perspective bottom view of the present invention.

FIG. 2 is a bottom view of the cross section of the main part of the present invention.

FIG. 3 is a diagram for explaining the operation of the present invention.

[Explanation of symbols]

 1 Machine Tool 2 Jig 3 Guide Rail 4a Carrying Carriage 4b Carrying Carriage 5 Wheels 6 Rack 7 Servo Motor 8 Pinion 9 Workpiece Support 12 First Table 14 Cylinder for Advance / Retreat 15 Second Table 16 Cylinder for Vertical Movement

Claims (1)

[Scope of utility model registration request] 1. A guide rail that is installed in front of a machine tool and extends in the left-right direction, and is guided by the guide rail so as to be self-propelled, and between a workpiece receiving position and a jig front position of the machine tool. And a carry-out carriage that moves back and forth between the jig front position and the workpiece receiving position of the machine tool, and a workpiece is placed on the carry-in carriage and the carry-out carriage. A pair of workpiece supports that are held on both sides, a first table that is movable between the pair of workpiece supports in a horizontal direction orthogonal to the traveling direction of the carry-in carriage and the carry-out carriage, and the first table. A workpiece loading / unloading device, which is provided with a second table that moves up and down on one table.