JPH0242035Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention Industrial Application Field: The present invention relates to a cable gripping structure for a cable crossing portion from a fixed part to a swinging part in equipment having a horizontal swinging beam, such as a yard crane.

Conventional technology: The conventional method for such parts is the curtain cable method. This is a method in which a portion of the cable is hung across a guide rail, such as a curtain rail, in a wavy pattern using several hangers, similar to hanging a curtain, and this portion expands and contracts as it is guided by the rotation of the rotating section. This method has the drawback that the length of the cable on the guide rail is long and there is less room for the cable to expand and contract, making it unsuitable for wide angle turns.

Problems to be Solved by the Invention: The present invention provides a cable gripping structure that can be used in the above-mentioned swivel unit and can be swiveled at a wide angle.

Means and action for solving the problems in the structure of the invention: In the invention, the crossing part of the cable is twisted at the center of the turning to accommodate the turning, or the cable is made to hang down in a U-shape so that it can be turned. Therefore, it is designed to wrap around a cable guide that is concentric with the center of rotation.

Example: Fig. 1a is a vertical cross-sectional view of the rotating part of the structure of the present invention before turning, and b is a plan view of the same, in which 1 is the fixed part, 2 is the rotating part, 3 is the center of rotation, 4 is the high voltage cable, and 5 is the same plan view. It is a low voltage cable. In addition, 7 is a high-voltage cable pipe of the fixed part, 8 is a high-voltage cable pipe of the rotating part, and 7a and 8a are the rising and hanging parts respectively placed at the turning center 3, and the high-voltage cable 4 runs seamlessly inside this pipe. Passed by. In the low voltage cable 5, the transition part 5a
One end is fixed to the upper end of the cable mounting frame 9 erected on the floor of the fixed part 1, and the other end is fixed to the rotating part 2 concentrically with the rotation center 3 and hangs down. Clips 11a and 1 are attached to the lower ends of the
1b is fixed, and the crossover electric wire 5a is held in place by the clip 11.
It hangs down in a U-shape between a and 11b. Reference numeral 1a denotes a cylindrical guide for a low-voltage cable transition portion 5a fixed to the fixed part 1 concentrically with the rotation center 3. In the figure, this cylindrical body has the same diameter as the rotation part cable attachment body 2a, and both cylindrical bodies are attached to the ends thereof. Face each other with a short gap. The figure shows a case in which eight low-voltage cables 5 are attached to the outer periphery of the wire attachment body 2a.

Figure 2 shows the rotating part rotated approximately 210 degrees from the state shown in Figure 1, and a and b in the same figure are a and b in Figure 1.
correspond to each. In this state, the high-voltage cable 4 can be twisted within the permissible limit if the length of the transition section is sufficiently long, and the shortening of the length of the transition section due to this twist can be caused by
This can be accommodated with plenty of room for the cables. The low voltage cable also wraps around the guide 1a with its hanging portion 5a to accommodate this turning.

Effect: As described above, all high and low voltage cables can easily cope with the turning of the turning section.

[Brief explanation of the drawing]

Figure 1 a is a longitudinal sectional view of the invented structure before turning, Figure 1 b is a plan view of the same, and Figures 2 a and b are the first view after turning.
FIG. 3 is a drawing corresponding to figures a and b. 1... fixed part, 1a... low voltage cable guide,
2...Swivel part, 3...Swivel center, 4...High voltage cable, 5...Low voltage cable, 7, 8...High voltage cable pipe, 9...Cable mounting frame, 11a, 11b
...Crip.

Claims (1)

[Scope of utility model registration request] In the transition section of the cable from the fixed section to the swivel section, for high-voltage cables, the transition section should be at the center of the swivel, and the length of this section should be long enough to keep the twisting of the cable due to the swivel within an allowable range. To allow room for shrinkage, the transition part of the low-voltage cable is made to hang down in a U-shape, and as the swivel part turns, this hanging part extends to the outer surface of the cable guide provided concentrically with the turning center of the swivel part. A rotating power supply structure with tightly wound high-voltage and low-voltage cables.