JPS6229695Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control cable used for remote control in various devices, and more particularly to a control cable having the ability to automatically adjust the length of an inner cable.

The control cable has a structural problem in that the wire inner cable extends in proportion to the number of times it is used, and the extension leads to a lack of the originally specified stroke, resulting in dissatisfaction with the fact that the original purpose cannot be achieved. be.

As a device for automatically adjusting the extension of the cable, there is, for example, an automatic cable adjustment device for a cable actuating mechanism proposed in Japanese Utility Model Application Publication No. 56-30617.

This device is configured to automatically adjust the cable extension by operating a control lever or clutch pedal.

Therefore, the cable extension cannot be adjusted unless the operating lever or clutch pedal is operated.
It is necessary to operate a control lever or a clutch pedal to adjust the cable extension, and there is a structural problem in that the cable extension cannot be automatically adjusted without operating the control lever or clutch pedal.

The present invention was developed in view of the above-mentioned circumstances, and an object of the present invention is to provide a control cable that can automatically adjust the extension length of an inner cable.

Therefore, in the present invention, the outer 1 is connected in the middle with a straight outer pipe 2, and the screw rods 4 and 5 are respectively fixed to the ends of the inner cable 3 that can be separated in the outer tube 2, and both screw rods 4, 5 are screwed into both ends of a straight inner pipe 6 which is movable in the pipe direction within the outer pipe 2 so as to be freely threadable in the pipe direction, and between the center of the inner pipe 6 and both threaded rods 4, 5. Coil springs 7 and 8 are respectively mounted with their ends fixedly attached, and a conduit 9 is connected to the outer 1 end so that it cannot rotate around the axis of the tube and can be removed freely. Pair connecting rod 1 formed with a protrusion 11a that fits with the guide groove 10 along the tube axis direction
The tip of the connecting rod 11 is built in such a way that it can move freely in the tube axis direction while being restricted to non-rotatable, and the tip of the pair connecting rod 11 and the 3 ends of the inner cable are integrally connected, and the conduit 9 is removed from the outer 1 and the inner Rotate the cable in the opposite direction to the direction in which it is twisted, and
1. The coil springs 7 and 8 are tightened through the inner cable 3 and the screw rods 4 and 5, and the conduit 9 can be reconnected to the outer 1 with the restoring torque accumulated in the coil springs 7 and 8. As a feature,
The length of the inner cable can be automatically adjusted.

As a result, the present invention has the following advantages.

As the inner cable is extended and the tension applied to the inner is reduced or eliminated, the coil spring that has accumulated restoring torque uses its restoring torque to move the screw rod toward the center of the inner pipe. The inner cable, which is integrated with this threaded rod, is pulled into the inner pipe, the previous extension is eliminated, and the inner cable automatically returns to its original specified stroke.

There is no need for artificial stroke adjustment after setting, and various devices are always operated in the best setting state, which is useful.

Structurally, the cable only has a straight pipe part in the outer pipe part in the middle of the outer cable, so the flexibility of the entire cable is not lost, and it has the same usability as the conventional cable.

The restoring rotational force of both coil springs is accumulated by the rotational force in the opposite direction to the twisting direction of the inner cable, because the rotational directions are opposite to each other.
Twisting caused by the rotation of both inner cables through the screw rod is canceled out at the inner pipe portion, so no twist remains in both inner cables, and their functions are not affected.

The configuration of the embodiment shown in FIGS. 1 to 3 will be described below.

The outer 1 and the outer pipe 2 are concentrically connected and fixed together through the joint pipes 12 and 13, and a conduit 9 is connected to both ends of the outer 1 through the joint pipe 14.
are non-rotatably and removably connected around the tube axis. Specifically, the connection pipe portion 14a of the joint pipe 14 with the conduit 9 has a square diameter cross section, into which the square hole 9a of the conduit 9 is fitted, and this connection state is maintained by a ring. 15 is keeping it.

In the conduit 9, a protrusion 11a is provided at the tip of the pair connecting rod 11 which is firmly connected to the end of the inner cable 3, and this protrusion 11a is freely fitted and slid along the guide groove 10. Therefore, the pair connecting rod 11 is free only to slide relative to the conduit 9, and is also free to rotate when the conduit 9 is rotated.

The inner cable 3 can be twisted (twisted) due to its twisted structure, and does not hinder the rotation of the screw rods 4 and 5. Specifically, when applying restoring rotational force to the coil springs 4 and 5 by the conduit 9, there is twisting freedom for slight untwisting and slight tightening of the twist, and with this twisting freedom, the coil springs 7, 8 enables the screw rods 4 and 5 to rotate.

Inner cable 3 and screw rod 4, which is an integrated connection rod,
5 are screwed into threaded holes 6a and 6b of the inner pipe 6, respectively, and are screwed by receiving the rotational force of the conduit 9 through the inner cable 3 and the pair connecting rod 11, thereby causing the coil springs 7 and 8 to move in the pipe direction. It can be wound and tightened as if it were pulled on each side. Specifically, the screw rod 4 screws away from each other in the clockwise rotation direction, and the screw rod 5 screws away from each other in the counterclockwise rotation direction, thereby applying restoring rotational force to the coil springs 7 and 8, respectively. (Fig. 1) Both coil springs 7 and 8 are installed by fixing their ends to the shafts 16 and 17 installed in the center of the inner pipe 6 and the screw rods 4 and 5, and are connected to the inner cable 3. With the extension, the screw rods 4 and 5 are respectively screwed in the reverse rotation direction by the accumulated restoring rotational force to draw the inner cable 3 closer to each other and eliminate the extension. (FIG. 4) In the embodiment shown in FIG.
This figure shows an embodiment in which the coil springs 7 and 8 are connected only at one end (the rest is the same as the embodiment shown in FIG. 1). Connecting force to the rod 11,
Inner cable 3, screw rod 5 to coil spring 8
After applying restoring rotational force to the coil spring 8, the coil spring 8, shaft 17, inner pipe 6, shaft 16
It is transmitted to the coil spring 7 through the coil spring 7 and tightened to provide restoring rotational force.

In this embodiment configuration, the conduit 9 only needs to be installed at one end of the outer 1, which is easy and inexpensive to manufacture, and the coil springs 7 and 8 can be tightened by rotating only one conduit 9. There are advantages. Such operational advantages are common to the embodiment configuration shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing one embodiment of the control cable of the present invention. FIG. 2 is a vertical sectional side view taken along the - line. FIG. 3 is a vertical sectional side view taken along the - line. FIG. 4 is a longitudinal sectional front view showing a state in which the extension allowance of the extended inner cable has been eliminated. FIG. 5 is a longitudinal sectional front view showing another embodiment. FIG. 6 is a longitudinal sectional front view showing a state in which the extension allowance of the extended inner cable has been eliminated. In the figure, 1 is an outer pipe, 2 is an outer pipe, 3 is an inner cable, 4 and 5 are screw rods, 6 is an inner pipe, 7,
8 is a coil spring, 9 is a conduit, 10 is a guide groove, 1
1 is a pair connecting rod, and 11a is a protrusion.

Claims (1)

[Scope of utility model registration request] The outer part is connected with a straight outer pipe, and screw rods are fixed to the ends of the split inner cable in this outer pipe, so that both screw rods are movable in the direction of the pipe within the outer pipe. A coil spring is installed in both ends of the pipe so that it can be freely screwed in the direction of the pipe, and a coil spring is attached to the center of the inner pipe and both screw rods, and a conduit is attached to the outer end. The conduit is connected so as to be non-rotatable and removable around the axis, and has a protrusion formed in the conduit that fits with the guide groove along the pipe axis direction on the same inner surface. It is built so that it can be moved freely in the direction of the tube axis, and the tip of the pair connecting rod and the end of the inner cable are integrally connected, and the conduit is removed from the outer and rotated in the opposite direction to the twisting direction of the inner cable. A control cable characterized in that a coil spring is wound around an inner cable and a screw rod, and the conduit can be reconnected to the outer in a state in which restoring rotational force is accumulated in the coil spring.