JPH0741736Y2 - Cable winding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device having a rotating part and a fixed part, such as an antenna device and a telescope, in which a rotating part rotates a cable group connecting the rotating part and the fixed part. The present invention also relates to a mechanism for winding a cable group without damaging it.

[Conventional technology]

FIG. 4 is a view showing a conventional cable winding mechanism. In the figure, 1 is a rotating portion arranged in the central portion, 2 is a fixed portion arranged around the rotating portion, 3 is a rotating shaft, 4 is a cable group for transmitting power or signals, and one end of the rotating portion 1 The other end of the fixing member 5 is connected to the fixing member 5 of the fixing portion 2 and is attached in a state of being bent into a substantially U shape.

Next, the operation will be described. The cable group 4 suspended downward from the fixture 5 attached to the rotating part 1 is bent at the lower part of the fixing part 2 and fixed to the fixture 6 attached to the upper part of the fixing part 2, and the rotating part and the fixing part are fixed. Are connected between.

As shown in FIG. 5, when the rotating part 1 rotates by α °, the cable group near the fixture 5 rotates by α °, which is the same as the amount of rotation of the rotating part, but the cable group near one fixture 6 is fixed. Part 2
It does not rotate because it is fixed to. Therefore, rotating part 1
When is rotated by α °, the cable group between the fixtures 5 and 6 is twisted by α ° around the axis of the cable.

Since the durability of the cable group 4 is determined by this twist amount, the length of the cable group between the fixtures 5 and 6
The allowable amount of twist of this cable group is determined, and the maximum rotation amount of the cable winding mechanism is determined.

[Problems to be solved by the device]

Since the conventional cable winding mechanism is configured as described above, there is a problem that the rotation amount of the rotating portion is limited.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a winding mechanism in which the rotatable portion has a larger rotatable amount without damaging the cable group.

[Means for Solving the Problems]

The cable winding mechanism according to the present invention includes a cable winding mechanism for a cable group in the vicinity of the lower part and the upper part of the fixed part between the rotating part and the fixed part.
Twisting direction of the cable group is provided by providing a foldable section of the cable group, and by installing a rotatable suspender in the fold section near the upper part of the fixed section of the cable group, it can rotate around an axis parallel to the rotation axis of the rotating section. The bending part near the upper part of the fixed part rotates,
This is to reduce the twist of the cable group.

[Action]

The cable winding mechanism according to the present invention reduces the twist of the cable generated when the rotating part is rotated by the rotatable suspender provided near the upper part of the fixed part, and prevents the cable group from being damaged and rotating. Increase the rotatable amount of the part.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a rotating portion, which has a disk-shaped rotary fixing tool 5 rotatable about a rotary shaft 3. 2 is a fixed part,
A ring-shaped upper fixture 6 arranged around the rotation fixture 5, and a plurality of suspenders 7 rotatably suspended around the upper fixture 6 via suspension wires 8;
A ring-shaped lower fixing member 9 provided corresponding to the upper fixing member 6 is provided. Then, after the cable group 4 having one end connected to the upper fixture 5 hangs down and is bent in a U shape, the cable group 4 is fixed in the state of being bent again at the suspending tool 7 and further hangs down so that the lower end thereof has the ring shape. It is connected to the lower fixture 9 of. That is, the cable groups 4 that are hung from the disc-shaped rotary fixing tool 5 and are bent in a U-shape in a radial direction are doubly bent by the hanging tool 7, and then one end of each cable group is connected to the ring-shaped lower fixing tool 9. It is fixed.

Next, the operation will be described. As shown in FIG. 2, when the rotating unit 1 rotates about the rotation axis, the cable group between the fixing tool 5 and the suspending tool 7 twists around the axis of the cable. The amount of twist is determined by the amount of rotation α ° of the rotating unit 1 and
Amount α obtained by subtracting the amount of rotation β ° about the axis parallel to the rotation axis 8 of
Equal to ° -β °.

Since the strength of the cable group 4 is determined by the amount of twist around the axis of the cable, the amount of twist of the cable group 4 can be made smaller than that of the conventional mechanism. It will be possible to take.

In the above embodiment, the suspending tool 7 and the suspending wire 8 are used as means for suspending the cable group near the upper portion of the fixing portion, but a suspending rod 10 and a washer 11 can also be used as shown in FIG. In FIG. 3, reference numeral 7 denotes a hanger, and 4 denotes one cable of the cable group. The suspending tool 7 is rotatable around the axis of the suspending rod 10 and has the same effect as the suspending wire 8.

[Effect of device]

As described above, according to the present invention, by mounting the mechanism for reducing the twist of the cable caused by the rotation of the rotating part, it is possible to increase the rotatable amount of the rotating part without damaging the cable.

[Brief description of drawings]

FIG. 1 is a perspective view of a cable winding mechanism according to an embodiment of the present invention, FIGS. 2a and 2b are a plan view and a front view showing its action, and FIG. 3 is a schematic view showing another embodiment of the present invention. Enlarged view,
FIG. 4 is a perspective view showing a conventional cable winding mechanism, and FIG.
FIGS. A and b are a plan view and a front view showing the operation. In the figure, 1 is a rotating part, 2 is a fixing part, 3 is a rotating shaft, 4 is a cable group, 5 and 6 are fixing tools, 7 is a hanging tool, 8 is a hanging wire,
9 is a fixture, 10 is a hanging rod, and 11 is a washer. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A rotary fixing tool arranged at a central portion and connecting one end of a cable group, a fixed ring-shaped upper fixing tool arranged around the rotating fixing tool, and rotatably suspended on the upper fixing tool. Attached to the rotary fixing tool, one end of which is connected to the rotary fixing tool, and the hanging cable is bent and fixed at the upper part of the cable group that is hung radially, and a ring shape that connects the lower ends of the bent cable group. Cable winding mechanism with lower fixing device.