JPH0516085U - Work positioning device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the occurrence of distortion and damage to the work that is positioned and fixed on the jig. [Structure] An upper end surface of a suction cup 4a formed so as to be able to support the work 2 in a state where the internal pressure is equal to the atmospheric pressure is provided so as to protrude above the receiving piece 3a of the jig 3, and the suction cup 4 is provided.
The depressurizing mechanism 4c that depressurizes the internal pressure of a to elastically deform the suction cup 4a and adsorb it to the work 2 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work positioning device for positioning and fixing a work on a receiving piece of a jig.

[0002]

[Prior Art]

 Conventionally, for example, in a vehicle manufacturing line, when applying a structural adhesive to a work such as a body panel of a vehicle, after the work is placed on a positioning jig in advance and positioning is performed, a predetermined process is performed by a robot or the like. Has been given. FIG. 4 shows an example of the work positioning device 10, in which the lifter 13 projecting upward in the central portion of the jig 11 once receives the work 2 and then descends to move it onto the receiving piece 12. It is configured to replace the work 2 with. Further, the work 2 is clamped by the clamp portion 15 of the clamp device 14 as shown in FIG. 5, and fixed at a predetermined position of the receiving piece 12.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional positioning device, since the work 2 placed by the lifter 13 is clamped on the receiving piece 12 by the clamp device 14, the load is concentrated on the clamp portion 15, so the work 2 It is easy to cause distortion and scratches. Therefore, in the present invention, it is a technical subject to be solved to reduce the distortion and the hit damage that occur in the work when the work is positioned and fixed on the jig.

[0004]

[Means for Solving the Problems]

 A technical means for solving the above problems is to configure a work positioning device as follows. That is, a work positioning device for placing and fixing a work on a receiving piece of a jig, the upper end surface of which is higher than the work mounting surface of the receiving piece in a state where internal pressure is equal to atmospheric pressure. While in the state, the work is placed on the suction cup to elastically deform and suck the work when the internal pressure is reduced to a predetermined atmospheric pressure or less, and the internal pressure of the suction cup is reduced to the predetermined atmospheric pressure or less. Therefore, a pressure reducing device is provided for abutting the end surface of the work to the receiving piece and for positioning and fixing the work when the work is sucked.

[0005]

[Action]

 According to the work positioning device having the above configuration, when the work is placed on the suction cup provided so as to project above the receiving piece, the pressure inside the suction cup is reduced by the decompression device, and the suction cup becomes the work. Adsorb. At this time, since the suction cup elastically deforms, the work comes into contact with the receiving piece, and the work is positioned and fixed on the receiving piece by the suction force of the suction cup.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view illustrating a work positioning device provided in a process of applying a structural adhesive to a vehicle body panel (work) in a vehicle manufacturing line. In FIG. 1, the positioning device 1 is composed of a jig 3 for positioning and fixing the work 2, and a suction device 4 for sucking the work 2 and fixing the work 2 on the jig 3. .. The jig 3 is such that a receiving piece 3a formed corresponding to the shape of the peripheral portion of the work 2 is attached to the base 3b. The suction device 4 is composed of a suction cup 4a on which the work 2 is placed, a mounting base 4b for supporting the suction cup 4a, and a pressure reducing mechanism 4c capable of reducing the atmospheric pressure inside the suction cup 4a. A plurality of jigs 3 are arranged according to the shape of the work 2. The suction cup 4a is formed of rubber or the like into a hollow conical shape, and is mounted on the base 3b via the mounting base 4b so as to project above the receiving piece 3a (about 2 mm in this embodiment). Even when the work 2 is placed, the work 2 has a strength such that the work 2 does not come into contact with the receiving piece 3a when it is placed on the work piece 2, and the work piece 2 is deformed by the suction force when picked up so that the work piece 2 can come into contact with the receiving piece 3a. Has been formed. Incidentally, FIG. 2 shows a partial view for explaining a state in which the work 2 is in contact with the receiving piece 3a. The depressurization mechanism 4c can adsorb the suction cup 4a to the work 2 by reducing the internal air pressure of the suction cup 4a when air is supplied from the air supply device 5.

Next, as shown in FIG. 3, the air supply device 5 includes an electromagnetic valve 5a, a pressure reducing valve 5b, and an air supply device 5c such as an air pump. It is piped so that it can be supplied. Therefore, the suction force of the suction cup 4a can be easily adjusted by controlling the air pressure with the pressure reducing valve 5b.

Next, the operation of the work positioning apparatus according to the present invention will be described. First, the work 2 is placed on the suction cup 4a provided above the receiving piece 3a. At this time, since the work 2 does not come into contact with the receiving piece 3a due to the existence of the suction cup 4a, the work 2 receives the receiving piece 3a. There is no scratch. This state is shown in FIG. When necessary air is supplied from the air supply device 5 to the pressure reducing mechanism 4c, the pressure inside the suction cup 4a is reduced by the action of the pressure reduction mechanism 4c, so that the suction cup 4a is adsorbed to the work 2. Moreover, since the suction cup 4a attached to the mounting base 4b is elastically deformable by the suction force during suction, the supporting position of the work 2 is lowered. Therefore, as shown in FIG. 2, the work 2 descends, the end surface of the work 2 comes into contact with the receiving piece 3a, and the work 2 is pulled downward on the receiving piece 3a by the suction force of the suction cup 4a, so that The shape is fixed in the corresponding predetermined position.

The work positioning device is configured as described above, and since the work 2 is once placed on the suction cup 4a, the work 2 is not only scratched by the suction cup 4a but also scratched by the receiving piece 3a. Does not occur. Further, since the suction cup 4a projects slightly above the receiving piece 3a, the setting position of the work piece 2 is accurate, so that scratches are less likely to occur in the process of being fixed to the receiving piece 3a. Together with being fixed by the suction cup 4a whose suction force is adjusted, it is possible to prevent the work 2 from being distorted during fixing. Further, the step of placing the work 2 on the jig 3 and the step of clamping the work 2 at a predetermined position of the receiving piece 3a can be continuously performed, and the work positioning efficiency is improved. be able to. Since the work positioning device can be simplified as compared with the conventional example including the lifter and the clamp, the manufacturing cost of the device can be reduced.

[0010]

[Effect of the device]

 As described above, in the workpiece positioning device according to the present invention, the suction cup is elastically deformed by the suction force of the suction cup provided by projecting the work above the receiving piece of the jig, and at the same time, the workpiece hits the receiving piece. Since it is configured to contact and position and fix, it is possible to reduce the distortion and the occurrence of scratches when the work is fixed on the jig, which has the effect of maintaining high quality of the product. ..

[Brief description of drawings]

FIG. 1 is a front view of a main part of a work positioning device.

FIG. 2 is a partial front view for explaining a suction cup.

FIG. 3 is an explanatory diagram of an air supply device.

FIG. 4 is a front view for explaining a lifter according to a conventional example.

FIG. 5 is a partial front view for explaining a clamp according to a conventional example.

[Explanation of symbols]

 1 Positioning Device 2 Work 3 Jig 3a Receiving Piece 4a Sucker 4c Pressure Reduction Mechanism 5 Air Supply Device

Claims (1)

[Scope of utility model registration request] 1. A work positioning device for mounting and positioning a work on a receiving piece of a jig, the upper end surface of which is a work mounting surface of the receiving piece with internal pressure equal to atmospheric pressure. While located in a higher state, a suction cup that elastically deforms and adsorbs the work when the work is placed and the internal pressure is reduced to a predetermined atmospheric pressure or less, and the internal pressure of the suction cup is set to the predetermined atmospheric pressure or less. A work positioning device, comprising: a pressure reducing device for bringing the end face of the work into contact with the receiving piece and positioning and fixing the work when the work is attracted by depressurizing.