JPH0576666U - Welding torch conduit cable support structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable welding of the inner surface of a cylindrical target work without restricting the movement of the wrist of the robot arm. [Structure] A guide rail 13 is attached along an upper surface of a robot arm 2 of a welding robot 1. Guide rail 1
The slider 14 is slidably engaged with the slider 3. Slider 14
A cable support portion 18 is provided on the top. Cable support 18
Supports the conduit cable 5. The force acting on the conduit cable 5 is absorbed by the movement of the slider 14. Since the conduit cable 5 is arranged along the arm, it is possible to weld the inner surface portion of the cylindrical target work.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a conduit cable support structure for a welding torch.

[0002]

[Prior Art]

 Conventionally, a conduit cable of a welding torch has a welding wire feeding motor c installed at a rear portion of a robot arm b of a welding robot a as shown in FIG. A conduit cable e is provided up to the torch d. For example, as shown in FIG. 5, a conduit hanger f is installed separately from the robot arm, and the conduit cable e is hung to support the conduit hanger f. Those who are sick are known.

[0003]

[Problems to be solved by the device]

 However, with such a supporting structure, when the target work is box-shaped or tubular and welding is required on the inner surface, when the welding torch d is inserted into the work, it is fed. Since the motor c and the conduit hanger f interfere with the work, the welding torch d cannot be inserted into a deeply located welding site.

Therefore, it is conceivable that the conduit cable e is fixed along the robot arm b. However, if this is done, the movement of the wrist portion at the tip of the robot arm b that supports the welding torch d will cause the conduit cable to move. There is a problem that it is regulated by being restricted by e.

The present invention provides a conduit cable support structure for a welding torch that can weld the inner surface of a cylindrical target work without restricting the movement of the wrist of the robot arm.

[0006]

Means for Solving the Problems The present invention is premised on a conduit cable support structure for a welding torch having a wrist at the tip of a robot arm of a welding robot and a welding torch provided on the wrist. A guide rail is installed on the robot arm of the welding robot along the robot arm, a slide member is slidably provided on the guide rail, and a conduit cable is attached to the slide member. A cable support part that supports along is formed.

[0007]

[Action]

 Since the conduit cable is supported along the robot arm, even if a box-shaped or tubular work requires welding on its inner surface, the welding torch can be used. Can be inserted into the work. Further, in such a case, even if a tensile force acts on the conduit cable due to the movement of the wrist, the slide member having the cable supporting portion for supporting the conduit cable only slides on the guide rail. The movement of the wrist of the robot arm tip is not restricted.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing the overall configuration, 1 is an industrial robot, and a welding torch 3 is attached and fixed to a front end portion of a robot arm 2 via a torch holder 4. A conduit cable 5 is connected to the welding torch 3. The wire of the conduit cable 5 is linked to a welding wire feeding motor 12 mounted and fixed to another support 11.

A guide rail 13 is arranged on the upper surface of the robot arm 2 along the arm longitudinal direction, and sliders 14 and 14 are slidably engaged with the guide rail 13. An intermediate portion of the conduit cable 5 is attached and fixed to each slider 14 via upper and lower blocks 15 and 16 which form a cable supporting portion 18, whereby the conduit cable 5 is attached to the robot arm 2. It is arranged above the robot arm 2. That is, as shown in FIGS. 2 and 3, the lower block 16 has a recess 16a corresponding to the conduit cable 5 formed in the upper portion thereof, and is fixedly mounted on the slider 14 so that the lower block 16 is mounted on the lower block 16. The upper block 15 having the concave portion 15a corresponding to the conduit cable 5 is fixedly fastened via the bolts 17 and 17, whereby the conduit cable 5 is slidably attached to the slider 14. ..

According to the above-mentioned structure, since the conduit cable 5 is arranged on the robot arm 2 along the robot arm 2, it is deep inside the target work such as a cylinder. The welding torch 3 can be inserted deeply, and welding can be performed even on a work having a narrow opening and a deep welding portion.

Moreover, in such a case, for example, if the wrist portion at the tip of the robot arm 2 is twisted, a compressive force and a tensile force act on the conduit cable 5. Only the blocks 15 and 16 moving together with the slider 14 move along the guide rail 13. Therefore, the movement of the blocks 15 and 16 prevents the conduit cable 5 from restraining the movement of the wrist portion of the robot 1, and the movement of the wrist portion at the tip of the robot arm 2 is not restricted.

[0013]

[Effect of the device]

 As described above, according to the present invention, the conduit cable is arranged along the upper surface of the robot arm by using the slide mechanism including the guide rail and the slide member, so that the welding torch has a cylindrical shape or the like. It can be inserted into the inner surface of the target workpiece, and welding can be performed even on workpieces with narrow openings and deep welds. Also, even if tensile force is applied to the conduit cable, the slide mechanism consisting of the guide rail and slide member is used, so the conduit cable follows the movement of the wrist smoothly and does not interfere with welding work. ..

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a conduit cable support structure for a welding torch.

FIG. 2 is a side view of a mounting portion of a conduit cable.

FIG. 3 is a sectional view of the same.

FIG. 4 is an explanatory diagram of a conventional example.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Industrial robot 2 Robot arm 5 Conduit cable 13 Guide rail 14 Slider 18 Cable support

Claims (1)

[Scope of utility model registration request] 1. A conduit cable support structure for a welding torch, which has a wrist at the tip of a robot arm of a welding robot, and a welding torch is provided on the wrist, wherein the welding robot has a wrist cable on the robot arm. A guide rail is installed along the robot arm, a slide member is slidably provided on the guide rail, and a cable support portion for supporting a conduit cable along the robot arm is formed on the slide member. A torch conduit cable support structure for welding.