JPH0120444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire elongation absorption mechanism in a wire drive device. More specifically, the present invention relates to a wire elongation absorption mechanism (hereinafter simply referred to as absorption mechanism) that has been improved to absorb only the permanent elongation of the wire without absorbing the elastic elongation of the wire due to overload.

Conventionally, as a remote control system, two wires 51 and 52 are each wired in tension as shown in FIG. A driven device having a drive device 54 having a pulley 53 wound in a direction, and a movable member 56 which is slidably or rotatably provided on a guide member 55 or the like and to which the other ends of the wires 51 and 52 are locked. The device 57 rotates the pulley 53 in the directions of arrows A and B to wind one of the wires 51 and 52 around the pulley 53 and unwind the other, thereby moving the movable member 56 in the direction of arrow C or A device (for example, a wind regulator) configured to perform reciprocating operation (or rotational operation) in the D direction is known.

However, normally, wires made of stranded metal wires have elastic elongation that returns to their original state when the tension applied to the wire is removed, and permanent elongation that does not return to their original state even when the tension is removed. If the latter permanent elongation occurs, the tension applied to the wire is lost and further play occurs in the wire, making it impossible to accurately transmit the operation of the drive device 54 to the driven device 57. Therefore, recently, in the above operation system, when permanent elongation occurs in the wire, it is possible to absorb the permanent elongation, and when used as a wire drive device, the permanent elongation of the wire is automatically Absorption mechanisms have been proposed that can absorb
-96985, Patent Application No. 1979-193979, etc.).

The basic structure of these absorption mechanisms is that the pulley 53 in FIG.
It is divided into two parts, the pulley 6 and the second pulley 8, and each has ratchet teeth 1 on the opposing sides.
3 and 14 are engraved on it. This one is the first
It has a function of absorbing permanent elongation of the wire by causing the pulley 6 and the second pulley 8 to rotate relative to each other.

However, when such an absorption mechanism is employed as a wire driving device, if the sliding resistance between the movable member 56 and the guide member 55 becomes temporarily large, or if the movable member 56 touches the stopper 58. Therefore, when the lever 61 is further driven in the direction of arrow B after the winding operation of the first wire 51 has been stopped, that is, after the winding operation of the first wire 51 is completed, the first pulley 6 and the second pulley 8 are rotated relative to each other. This causes excessive elastic elongation in the first wire 51 (eventually extending to the second wire 52), and furthermore, the ratchet teeth 1 are stretched to a state where rigidity play in each part is absorbed.
3 and 14 may advance in engagement. Such excessive elastic elongation of the wire has the disadvantage of causing permanent elongation, and also causes bending and deflection of the rotation shafts of the pulleys 6, 8 and other members, making it difficult to operate the operating system. .

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides a mechanism in which the ratchet teeth do not absorb elastic elongation even if the wire is elastically elongated.

That is, the present invention comprises (a) a casing, (b) a shaft rotatably provided within the casing, and a flange extending radially outward from the shaft and having a notch formed along its outer periphery. (c) a driving member rotatably provided in the casing adjacent to the flange and concentrically with the shaft, and having a first side surface on the flange side at one end edge of the notch; a second side surface opposite to the flange; a fan-shaped protrusion that abuts; and an elastic protrusion that is adjacent to one side of the fan-shaped protrusion with a gap and abuts the other edge of the notch; (d) a first pulley having first ratchet teeth near the outer periphery of the pulley; The second that can mesh with
a second pulley having ratchet teeth near the outer periphery of the side surface; (e) elastic means for pressing the first pulley and the second pulley against each other; (f) against rotation of the second pulley; (g) means for applying a braking force; (g) both ends of each of the first and second pulleys are locked to the outer peripheries thereof and are wound in opposite directions to form substantially one closed loop; (h) the other edge of the notch is formed into an inclined surface so as to widen the distance between the flange and the first pulley when it comes into contact with the elastic protrusion and is bent; The gist of this paper is the elongation absorption mechanism of the wire.

Note that the term "means for applying a braking force to the rotation of the second pulley" includes any means that resists the torque transmitted to the second pulley when the first pulley is rotated in the direction in which the first and second ratchet teeth are idling. It is. Then, there are those that urge the second pulley in the axial direction to generate a frictional force between the second pulley and the stationary member, and those that apply a torque in the opposite direction to the torque transmitted to the second pulley.

Next, the wire elongation absorption mechanism of the present invention will be explained with reference to the drawings.

Fig. 1 is a longitudinal sectional view showing an embodiment of the mechanism of the present invention, Fig. 2 is a sectional view taken along the line X-X of Fig. 1, and Fig. 3 shows the mechanism of the present invention employed as a wire drive device. FIG. 4 is a schematic perspective view of the wind regulator, FIG. 4 is a vertical cross-sectional view showing the operating state of the mechanism of the present invention, and FIG. 5 is a vertical cross-sectional view showing another embodiment of the mechanism of the present invention.

In FIG. 1, 1 is a casing consisting of a bottomed cylindrical main body 1a and a cover 1b. A shaft 2 is rotatably provided inside the casing 1. One end 2a of the shaft 2 protrudes outside the casing 1, and is used, for example, as a crank handle (third
It is driven by 61) in the figure. A bottomed cylindrical flange 3 extending radially outward is fixed to the shaft 2 by welding or the like. Shaft 2 and flange 3
constitutes a driving member. Flange 3 has a second
As clearly shown in the figure, a fan-shaped cutout 4 is formed along the outer periphery.

A first pulley 7 and a second pulley 8 are provided on the outer periphery of the shaft 2 adjacent to the flange 3 so as to be rotatable in that order. 1st pulley 7
The second pulley 8 is further provided so as to be movable in the axial direction relative to the shaft 2 by a gap 9. A wave washer 10 is interposed between the second pulley 8 and the casing 1, so that the second pulley 8 is always pressed toward the first pulley 7, and the first pulley 7 is pressed toward the flange 3. .

As shown in detail in FIG. 2, an elastic projection 6 and a sector-shaped projection 5 that can be engaged with the sector-shaped notch 4 are protruded from the first side surface of the first pulley 6 on the flange 3 side. A first ratchet tooth 11 and a second ratchet tooth 12 are formed on the second side surface 7a opposite to the pulley 3 and on the side surface 8a of the second pulley 8 so as to mesh with each other. The end surface of the fan-shaped notch 4 that comes into contact with the elastic protrusion 5 is formed into a tapered shape as shown in FIG.

Two wires 2 substantially forming one closed loop are disposed on the outer periphery of the first pulley 7 and the second pulley 8.
1 and 22 are locked at both ends, and are wound around each other in opposite directions. The winding direction is such that when the first pulley 7 is rotated so that the ratchet teeth engage with the second pulley 8, the first wire 21 is unwound from the first pulley 7, and the second wire 22 is unwound from the second pulley 7.
The direction is such that it is wound around the pulley 8.

In this embodiment, a wave washer 10 is used as means for applying a braking force to the rotation of the second pulley.
This applies to the casing 1a. That is, when the first ratchet tooth 11 rotates in the idling direction relative to the second ratchet tooth 12, the second pulley 8 is pressed against the casing 1a via the wave washer 10, and a frictional force is generated. This frictional force then becomes the braking force.

Next, the operation when the wire elongation absorbing mechanism constructed as described above is used as the drive device 54 of the wind regulator shown in FIG. 3 will be explained.

A driven device 57 shown in FIG. 3 has the same configuration as a conventional driven device, and includes a guide member 55 and a movable member 5 slidably provided on the guide member 55.
6, and a stopper 58 for stopping the sliding of the movable member 56.

The mechanism of the present invention exhibits substantially the same effect as the conventional mechanism as long as the movable member 56 slides smoothly.

That is, when the shaft 2 is rotated in the direction of arrow A, which is the direction in which the ratchet teeth 11 and 12 mesh in FIGS. The first pulley 6 is also rotated in the direction of arrow A.

Furthermore, since the ratchet teeth 11 and 12 are in the meshing direction, the second pulley 8 also rotates in the direction of arrow A together with the first pulley 7. Therefore, the second wire 22
is wound around the second pulley 8, the first wire 21 is unwound from the first pulley 7, and the loop of wire circulates in one direction, e.g.
6 in the direction of arrow C. In this case, even if permanent elongation occurs in the wires 21 and 22, it will not be absorbed.

Next, when the shaft 2 is rotated in the direction of arrow B, which is the direction in which the ratchet teeth 11 and 12 are idling, the fan-shaped notch 4 of the flange 3 comes into contact with the elastic protrusion 6 adjacent to the fan-shaped protrusion 5, and the elastic protrusion 6 Rotate in the direction of arrow B. Along with this, the first pulley 7 also rotates in the direction of arrow B.

Therefore, the first wire 21 is wound around the outer periphery of the first pulley 7.

In this case, different effects will be exerted as described below depending on whether or not the wire is permanently elongated.

First, if there is no permanent elongation in the wire, the second pulley 8 will be
As a result, the first pulley 7 and the second pulley 8 rotate together in the direction of arrow B, and the loop of wire circulates in the direction of arrow D. In that case, no further elongation of the wire is absorbed. Furthermore, in this case, the elastic protrusion 6 rotates the first pulley without being bent.

If permanent elongation occurs in the wires 21 and 22, the second pulley will not rotate immediately due to the braking force of the wave washer 10 or the like.

Therefore, only the first pulley 7 rotates in the direction of arrow B. Therefore, the permanent elongation of the wire is absorbed by being wound around the first pulley 7, and the tension corresponding to the braking force is restored to the wire. That is, in the present invention, the tension of the wire can be freely adjusted by adjusting the braking force.

As described below, the mechanism of the present invention works when a suitable tension is maintained in the wire, that is, when no permanent elongation occurs, or after the permanent elongation of the wire is absorbed by the above action.
After the movable member 56 contacts the stopper 58, or if large sliding resistance temporarily occurs between the movable member 56 and the guide member 55, or between the window glass and the sash (not shown), the shaft 2 in the direction of arrow B, it exhibits its original excellent effect.

That is, when the shaft 2 is rotated in the direction of the arrow B as described above, the elastic protrusion 6 is bent and comes into contact with the fan-shaped protrusion 5, as shown in FIG. Therefore, the first pulley 7 is pressed toward the second pulley, that is, in the E direction, and the first pulley 7
Both pulley 7 and second pulley 8 are moving in the direction of arrow E. Therefore, the second pulley 8 does not have enough room to move in the axial direction. Further, since the biasing force of the wave washer 10 is large, the ratchet teeth 11 and 12 are strongly engaged, so that the meshing position of the ratchet teeth 11 and 12 does not advance. In other words, when an overload is applied, the ratchet teeth 11, 12
Since the first pulley is pressed in the E direction by the notch 4 of the flange 3 via the elastic protrusion, the first pulley is strongly meshed and is prevented from absorbing the elastic elongation of the wire.

Note that when the rotation of the shaft 2 is stopped due to overload in the B direction, the elastic protrusion 6 pushes the fan-shaped notch 4 slightly back in the A direction due to its elasticity, so that the first pulley 7 due to the fan-shaped notch 4 The pressure on is released.

In the embodiment described above, the second pulley 8 is configured to be movable in the axial direction, and the wave washer 10
presses the second pulley 8 toward the first pulley 7, but as shown in FIG. 5, the first pulley 7 is made movable in the axial direction and the An elastic member such as a coil spring 25 or a wave washer (not shown) may be inserted between the pulley 7 and the casing 1. In that case, as shown in FIG. 5, the first pulley 7 is always separated from the flange 3 and moves toward the flange 3 only when absorbing the elongation of the wire. However, when excessive tension is applied to the first wire 21 and the elastic protrusion 6 bends into an inclined shape and comes into contact with the fan-shaped protrusion 7, the first pulley 6
movement toward the flange 3 side is prevented. As a result, the meshing of the ratchet teeth 11 and 12 progresses excessively,
Even the elastic elongation of the wire is prevented from being absorbed. That is, in the present invention, it is sufficient that the first pulley 7 and the second pulley 8 are urged to be pressed against each other, and that either the second pulley 8 or the first pulley 7 is movable in the axial direction.

Furthermore, when the wire elongation absorption mechanism of the present invention is employed as a drive device for a wind regulator,
As shown in FIG. 5, a conventionally known balance spring 32 is housed in a recess 33 of the second pulley 8, and its both ends are locked to the boss 34 of the casing 1 and the inner wall surface of the second pulley 8 (not shown). By keeping the window glass in place, the weight of the window glass can be balanced, making it easier to raise the window glass.

Furthermore, as shown by the two-dot chain line in FIG.
When interposing the fan-shaped notch 4 formed in the first pulley 7 and the end faces of the fan-shaped protrusion 5 protruding from the side surface of the first pulley 7,
The window glass is prevented from sliding down due to car vibrations and the window glass is prevented from being forced open from the outside.

The coil spring 25 and the balance spring 32 correspond to the means for applying a braking force to the rotation of the second pulley in this embodiment.
The coil spring 25 urges the second pulley 8 in the axial direction and generates a frictional force between it and the casing 1a. The balance spring 32 also applies a torque to the second pulley 8 in a direction that prevents it from rotating. Therefore, also in this embodiment, the wires 21, 22
When permanent elongation occurs, the second pulley 8 does not rotate immediately due to the braking force, and the elongation absorbing action is performed.

In addition, as a method of rotatably and concentrically supporting the first pulley 7 and the second pulley 8 in the casing 1 in the present invention, as shown in FIG.
In addition to being supported on a fixed shaft fixed to the main body 1a side of the casing 1, various modifications can be made.

As mentioned above, the wire elongation absorption mechanism of the present invention does not absorb the elastic elongation that occurs in the wire.
Since it can selectively absorb only permanent elongation, it has the excellent effect of always maintaining the tension of the wire within an appropriate range, and its practical value is extremely large.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the mechanism of the present invention, Fig. 2 is a cross-sectional view taken along the line X-X of Fig. 1 (however, the casing is omitted), and Fig. 3 is a wire-driven mechanism of the present invention. A schematic perspective view of the wind regulator employed as the device, FIG. 4 is a vertical cross-sectional view showing the operating state of the mechanism of the present invention, and FIG. 5 is a vertical cross-sectional view showing another embodiment of the mechanism of the present invention. , FIG. 6 is a schematic perspective view showing a conventional wind regulator. 1: Casing, 2: Shaft, 3: Flange, 4:
Notch, 5: Fan-shaped projection, 6: Elastic projection, 7:
1st pulley, 8: 2nd pulley, 10: wave washer, 11: 1st ratchet tooth, 12: 2nd ratchet tooth, 21: 1st wire, 22: 2nd wire.

Claims (1)

[Claims] 1. (a) a casing; (b) a shaft rotatably provided within the casing; and a flange extending radially outward from the shaft and having a notch formed along its outer periphery. (c) a driving member rotatably provided in the casing adjacent to the flange and concentrically with the shaft, and having a portion of the notch on a first side surface on the flange side; A fan-shaped protrusion that abuts the edge, and an elastic protrusion adjacent to one side of the fan-shaped protrusion with a gap and abutting the other edge of the notch are protruded, and the elastic protrusion is provided on the opposite side of the flange. (d) a first pulley having first ratchet teeth provided near the outer periphery of a second side surface; (d) a first pulley rotatably provided within the casing adjacent to the first pulley and concentrically with the shaft; , a second ratchet tooth meshing with the first ratchet tooth;
a second pulley having ratchet teeth near the outer periphery of the side surface; (e) elastic means for pressing the first pulley and the second pulley against each other; (f) against rotation of the second pulley; (g) means for applying a braking force; (g) both ends of each of the first and second pulleys are locked to the outer peripheries thereof and are wound in opposite directions to form substantially one closed loop; (h) the other edge of the notch is formed into an inclined surface so as to widen the distance between the flange and the first pulley when it comes into contact with the elastic protrusion and is bent; Wire stretch absorption mechanism.