JPS5926578B2 - cable shifter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cable shifter (
(cable lateral feeding device).

Before explaining the present invention in detail, two known structural examples of conventional cable shifters and their problems will be explained.

In a first example of a conventional cable shifter for aligning and winding a cable 2 on a winding drum 1, as shown in FIG. 1 of the accompanying drawings, as shown in FIGS. The cable shifter 3 is composed of a screw shaft 4, a nut 5 that engages with the screw shaft, a rotation prevention mechanism 6 for the nut 5, a pulley □ rotatably attached to the nut 5, etc., and the rotation of the winding drum 1 is By rotating the screw shaft 4 in conjunction with to the right, thereby allowing the cables 2 coming from the stationary cable guide 8 to be wound in an aligned manner onto the winding drum 1.

In this case, due to the shape of the cable groove in the pulley 7, in order to prevent the cable 2 from separating from the pulley T,
It is necessary to reduce the angle θ (see Fig. 2) between the pulley T and the cable 2, and for this purpose, it is necessary to increase the distance between the cable guide 8 and the cable shifter 3. Therefore, there is a spatial disadvantage. On the other hand, the fourth
In other examples shown in FIGS. 2 and 5, the pulley T in the previous example shown in FIGS. 2 and 3 is replaced with two rollers 9, and these rollers 9 connect It is rotatably attached, and the cable 2 is sandwiched between two rollers 9 so that it can be moved left and right as seen in FIG.

In the case of this example, even if the distance between the cable guide 8 and the cable shifter 3 is reduced, there is no fear that the cable 2 will come off as in the case of the previous example, but on the other hand, Structurally, the radius of curvature of the cable 2 at the rollers 9 or the cable guide 8 is reduced, which puts strain on the cable 2, resulting in damage to the cable 2 or shortening its lifespan. SUMMARY OF THE INVENTION Therefore, the present invention eliminates the above-mentioned drawbacks of conventionally known cable shifters, allows a cable guide and cable shifter to be brought close to each other, and provides a cable shifter that does not put strain on the cable. Its purpose is to obtain.

Hereinafter, attached drawings Nos. 6 to 10 showing one embodiment of the present invention will be described.
This will be explained based on the diagram.

6 to 10 show a state in which a third embodiment of the cable shifter according to the present invention is installed between the cable guide 8, which is the inlet for the cable 2 from the outside, and the cable winding drum 1. It is something.

As shown in the figure, two pulleys 10 and 1Cf (these pulleys 10 and 1σ do not necessarily have the same diameter) are attached to a bracket 11 made of two opposing substantially Y-shaped plates. It is rotatably mounted via shafts 12 and 17 vertically one above the other between the plates. Two shaft parts 13 and 14 are provided horizontally opposite each other on both sides of the outer ends of the two upper arm parts of this bracket 11, and these are connected to bearings 15 and 14, respectively, which are attached to the fixed side. 16
The bracket 11 is rotatably supported by the shaft portion 13.
and 14 so as to be able to perform pendulum motion. In addition, among these shaft parts, one shaft part 1
3 is provided with a hole 13' in the center thereof (see FIG. 8) through which the cable 2 can pass. Moreover, the positional relationship between the shaft parts 13 and 14 and the upper pulley 10 is as follows:
It is assumed that the relationship is determined so that the following equation is satisfied. Here, that is, this formula is as shown in FIG.
It is shown that when the cable 2 is wound around the pulley 10, the center of the cable 2 at the top of the pulley 10 coincides with the center line 17 of the shafts 13 and 14.

Next, a mechanism for imparting pendulum motion to the bracket 11 will be explained with reference to FIGS. 6 and 10.

Groove 2 of the straight nut guide 20 attached to the fixed side
1, a nut 22 is mounted in a movable manner.

This nut 22 is threadedly engaged with a screw shaft 23 having a male thread that engages with the female thread of the nut 22.
The nut guide 20 is rotatably supported by the nut guide 20. Further, a drive device 25 for rotating the screw shaft 23 is connected to one end (the right end in FIG. 10) of the screw shaft 23. Further, a pin 18 is fixed to the lower end of the lower leg of the bracket 11, and this pin 18 is fitted into a guide groove 26 provided in a nut 22 so as to be able to move vertically. be. In addition, 2 is shown in Figure 7.
As shown by the dotted chain line, the entire stroke of the center position A of the cable 2 at the lowest part of the lower pulley 1σ is required by the entire width of the winding drum 1, and the required movement amount of the nut 22 is also determined by itself.

In addition, in order to make the amount of horizontal movement of the center point A shown in FIG. 7 equal to the diameter of the cable 2 per one rotation of the winding drum 1,
That is, the rotational speed of the screw shaft 23 related to the screw pitch is set in advance to an optimal value. Further, in the present invention, the drive device 25 is not limited in its type, etc., and the number of rotations can be changed according to the rotation speed of the winding drum 1. It may be of any type as long as the direction of rotation changes each time one layer of the material is wound.

The present invention has the above configuration, and its operation will be explained next. 6, 7 and 10 show the state in which the winding drum 1 is rotated in the direction of arrow a shown in FIG. 6 and the cable 2 is wound onto the first layer of the drum 1.

At this time, each of the other components rotates or moves linearly in the direction of the arrow shown in the figure. That is, the cable 2 from the cable guide 8 passes through the hole 13 in the shaft portion 13 of the bracket opening 1 as shown by arrow b, and rotates the pulleys 10 and 10' in the direction shown by arrow c. The direction is changed by 1V, and the winding drum 1 winds up the winding drum. On the other hand, the screw shaft 23 is rotated in the direction shown by the arrow d by the drive device 25 of the cable shifter 3 at a speed corresponding to the rotational speed of the winding drum 1. performs a linear motion in the direction shown by arrow e, pushes pin 18 of bracket 11 in the direction of arrow e, and releases shaft portion 13.
and 14 (which is also the center of the cable 2 coming from the cable guide 8), the bracket 1 is moved around the bearings 15, 16 in the direction of the arrow f.
1 in pendulum motion. Center point A at this time (Kg7
(shown in the figure) is predetermined so that it is equal to the diameter of the cable 2 for one revolution of the winding drum 1, so the cables 2 are wound around the drum 1 in close proximity to each other. It turns out. When the first layer of the cable 2 has been wound onto the winding drum 1 in this way, the drive device 25 stops once and then starts rotating in the opposite direction, moving the nut 22 in the opposite direction to arrow e. The bracket 11 is moved in the opposite direction to the direction of the arrow f shown in FIG.
winding. In this way, the winding drum 1
The cable 2 can be wound in an orderly fashion as shown in FIG. As described above, in the cable shifter according to the present invention, a pulley is rotatably attached to a bracket so that the center of the cable passes through the top, and the bracket is set with the center line of the cable passing through the top of the pulley as the rotation axis. By making a pendulum motion, the cable can be wound in an aligned manner on the winding drum without putting strain on the cable, and the distance between the cable guide and the winding drum which are close to each other can be increased. can be installed in
Therefore, it is possible to extremely reduce the space required for the entire cable winding device.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a state in which cables are wound in an orderly manner on a winding drum, FIG. 2 is a plan view of an example of a conventional cable shifter, and FIG. 3 is an I of FIG. - line sectional view, 4th
Figure 5 is a top view of another example of a conventional cable shifter.
The figure is a sectional view taken along the line v-V in FIG. 4, and FIG.
A side view showing the embodiment, FIG. 7 is a sectional view taken along the line of FIG. 6,
8 is a sectional view taken along the line -- in FIG. 6, FIG. 9 is a sectional view taken along the line in FIG. 6, and FIG. 10 is a sectional view taken along the line X--X in FIG. 6. 1... Winding drum; 2... Cable;
3... Cable shifter; 9... Coro; 10, 10! ... Pulley; 11 ... Bracket; 1217 ... Pin; La 13, 14.
...shaft; 15, 16... bearing; 17.
...Center line of shaft parts 13, 14; 18...
Pin; 20... Nut guide; 22...
・Nut; 23... Screw shaft; 25...
, Drive device: 26... Guide groove.

Claims (1)

[Claims] 1. A cable installed between a winding drum and a cable guide, which is installed approximately on the center line of the winding drum and which is an inlet for the cable from the outside, and used for winding the cable in an orderly manner on the winding drum. The shifter has a pendulum motion section consisting of two upper and lower pulleys and a roughly Y-shaped bracket that rotatably supports the pulleys, and a pendulum motion section that makes pendulum motion around two shafts provided at the top of the bracket. One shaft of the bracket has a cable inlet and is supported through the bracket shaft to allow pendulum movement, and a pin is attached to the lower end of the leg of the bracket. Install the upper pulley so that the distance from the center of the upper pulley to the center line connecting the cable guide and the bracket shaft is equal to the sum of the radius of the outer circumferential groove of the pulley and the radius of the cable, and the pendulum tip of the bracket The outer circumferential groove of the lower pulley on the side serves as a guide for alignment and winding of the winding drum, and the shift guide mechanism is non-rotatably screwed into a screw shaft arranged to be reversely rotatable via a drive device. The nut guide is placed close to the pin of the bracket so that the pendulum movement direction of the bracket is parallel to the longitudinal direction of the nut guide, and the nut is slidably assembled in the groove of the nut guide. , wherein the pin is slidably engaged in a longitudinal groove provided in the nut.
shifter.