JPH04294996A - Wiring device for industrial robot - Google Patents

Abstract

PURPOSE:To install a connection box for a cable branching of an industrial robot so as to spoil no external appearance and to increase no moment of inertia. CONSTITUTION:A 2nd arm 6 is pivotally supported by a 1st arm 3 which is rocked in the horizontal face pivotally supported on a rocking body 2 and also rocked in the fore and aft direction as well, and the connection box 11 for wiring is stored inside a buckling 5, in the robot having the buckling 5 pivotally attached to a rocking base 2 and the 2nd arm 6 similarly adjacently to the 1st arm 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting electric wires to an industrial robot having a back link.

0002

2. Description of the Related Art FIG. 3 is an overall perspective view of a conventional industrial robot shown in the specification and drawings attached to, for example, Japanese Patent Application No. 2-218671. In the figure, 1 is a fixed base, 2
3 is a swinging base that is pivoted on a fixed base 1 and swings in a horizontal plane; 3 is a first arm whose lower end is pivoted to the swinging base 2 and swings back and forth by a motor 4; and 5 is a swinging base whose lower end swings. a back link pivotally connected to the base 2 and arranged in parallel with the first arm 3;
6 is a second arm which is pivotally connected to the upper end of the first arm 3 and the upper end of the back link 5 and has a wrist shaft 7 at its tip; 8 is attached to the rear end of the second arm 6 and connects the first and second arms 3;
This is a connection box that connects cables (not shown) wired to 6.

The conventional industrial robot is constructed as described above, and the swing base 2 swings in a horizontal plane, and the first arm 3
The second arm 6 moves by the swinging movement in the front-back direction, and the work using the wrist shaft 7 progresses. The cables that supply power to each part of the robot pass through the inside or outside of the first arm 3, are slackened at the elbow joint (the pivot point of the second arm 6), and are drawn into the connection box 8, where they are branched into each part. Wired.

0004

[Problems to be Solved by the Invention] In the conventional industrial robot wiring device as described above, the connection box 8 is connected to the second arm 6.
Since the first arm 3 is mounted on the top of the first arm 3, there is a problem in that there are restrictions on the external design and the moment of inertia around the first arm 3 increases.

The present invention was made to solve the above problems, and provides a wiring device for an industrial robot that can improve the appearance and reduce the moment of inertia around the first arm. The purpose is to provide

[0006]

[Means for Solving the Problems] A wiring device for an industrial robot according to the present invention is such that the inside of a back link adjacent to a first arm serves as a wiring connection box.

[0007]

[Operation] In this invention, since the inside of the back link is used as a connection box for wiring, there is no need to attach the connection box to the second arm.

[0008]

[Embodiment] Figs. 1 and 2 are views showing an embodiment of the present invention. Fig. 1 is an overall perspective view, and Fig. 2 is an enlarged perspective view of main parts of a back link. The same parts as the conventional device are the same. Indicated by sign.

In the figure, reference numeral 11 denotes a connection box housed inside the back link 5, in which a connector 12 is arranged vertically. The front surface of the junction box 11 can be opened and closed with a lid 13, and a connector 1 is provided on the inner surface of the lid 13.
A sponge-like flexible material 14 is attached to suppress the pressure.

In the industrial robot wiring device configured as described above, the power supply cable is connected to the connection box 1.
They are connected and branched by one connector 12. Therefore, the connection box 8 is not attached to the second arm 6, and there is a large degree of freedom in designing the appearance. In addition, the second longitudinal member
Since there is no heavy object at the end of arm 6, the moment of inertia around first arm 3 is reduced. Furthermore, since the position of the junction box 11 is lower than the position of the conventional junction box 8, maintenance work is easier for large robots.

[0011]

[Effect of the invention] As explained above, in this invention, the first
Since the inside of the back link adjacent to the arm is used as a wiring junction box, there is no need to attach the junction box to the second arm.
This has the effect of improving the appearance and reducing the moment of inertia around the first arm.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing an embodiment of a wiring device for an industrial robot according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of the back link in FIG. 1;

FIG. 3 is an overall perspective view showing a conventional industrial robot.

[Explanation of symbols]

1 Fixed stand 2 Rocking table 3 First arm 5 Backlinks 6 Second arm 11 Junction box

Claims (1)

[Claims] 1. A swing base that swings in a horizontal plane is provided on a fixed base, and has a vertically elongated first arm and a back link whose lower ends are pivotally connected to the swing base, respectively,
A wiring device for an industrial robot, characterized in that a second arm is pivotally attached to the upper ends of each of an arm and a back link, and the inside of the back link is used as a wiring junction box.