JPS59194160A - Mechanism for absorbing elongation of wires - Google Patents

Abstract

PURPOSE:To absorb only the permanent elongation, without absorbing the elastic elongation, of wires caused by overloard by constructing so that both the convex parts of a first concave-convex part provided in a second pulley and a second concave-convex part provided on the inside seating face of a casing are brought in contact with each other at the time of completion of the winding operation of a first wire. CONSTITUTION:A circular first concave-convex part 6 is formed on one side of a second pulley 4 and a circular second concave-convex part 7, which can be fitted to the first concave-convex part 6, is formed on the inside bottom face 1a of a casing 1. The length of wires 11, 12 is adjusted so that both the convex parts of these concave-convex parts 6, 7 are brought in contact with each other at the time when the winding operation of a first wire 11 is completed, e.g., when the moving member 16 of a remote control system is brought in contact with a stopper 18.

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 (11) and (b) are each wired in a tensioned state as shown in FIG. , a drive device (14) having a pulley α8) wound in opposite directions, and a guide member (
a driven device 07) having a movable member (16) which is slidably or rotatably provided on the wire α1) and the other end of the wire α1) and (b) is locked; By rotational drive in the directions of arrows (A) and (B) in (18), one of the wires (11) and (B) is wound around the pulley 03) and the other is unwound, thereby moving the movable member θ6) There are known devices (for example, window regulators) that are configured to perform reciprocating operation (or rotational operation) in the (0) direction or (D) direction.

However, a wire made of stranded metal wire or the like usually has elastic elongation that returns to its original state when the tension applied to the wire is removed, and permanent elongation that does not return to its original state even after 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 07) to the driven device 07). 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 adjusted when the wire is wound up. Absorption mechanisms have been proposed that can absorb
No. 9972, Japanese Patent Application No. 1983-96985, Japanese Patent Application No. 1983-
193979 etc.).

The basic structure of these absorption mechanisms is that the pulley (B) in Fig. 9 is connected to the first pulley (3) as shown by the two-dot chain line.
, the second pulley (4) is divided into two parts, and ratchet teeth (3a) and (4a) are respectively carved on the opposing sides of the two parts. This has the function of absorbing permanent elongation of the wire by causing the first pulley (8) and the second pulley (4) to perform relative rotation only in the direction of absorbing the wire.

However, when such an absorption mechanism is employed as a wire driving device, the movable member 06)
After the winding operation of the first wire (1υ) is completed, the first pulley (3) is stopped.
and the second pulley (4) are rotated relative to each other, and the ratchet tooth (Sa)
, (4aJ may advance in engagement.) Such excessive elastic stretching of the wire has the disadvantage of causing permanent elongation, and furthermore, the rotation axis of other members such as the This has the disadvantage that it causes bending and deflection, making it impossible to operate the operating system.

Therefore, as a result of intensive research to eliminate the above-mentioned drawbacks, the present inventor has developed a casing, a first pulley rotatably provided within the casing, and a first pulley having first ratchet teeth carved on the periphery of one side surface. a drive means for rotating the eleventh ring; and a second ratchet that is rotatably and axially movably provided within the casing and that meshes with the first ratchet teeth on a peripheral edge of one side surface. a second pulley having engraved teeth; an elastic member that urges the 21st pulley toward the second ratchet tooth in the axial direction thereof; and a first wire that is unwound from the outer periphery of the first pulley by the rotational operation of the driving means in the ratchet engaging direction, and a first wire that has an end locked on the outer periphery of the second boob, and that is engaged with the ratchet of the driving means. a second wire that is wound around the outer periphery of the 21st pulley by a rotation operation in the mating direction; a first annular uneven portion is formed on the other side of the second pulley; An annular second uneven portion that can fit into the first four convex portions is formed on the inner bottom surface of the casing, and when the winding operation of the first wire is completed, the first uneven portion and the second uneven portion are formed. When a wire elongation absorption mechanism in which the convex portions are in contact with each other is used as a wire drive device, it absorbs only the permanent elongation of the wire without absorbing the elastic elongation of the wire due to overload. This discovery led to the completion of the present invention.

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

FIG. 1 is a perspective view showing an embodiment of the absorption mechanism of the present invention, FIG. 2 is a schematic perspective view showing an embodiment of a remote control system employing the mechanism shown in FIG. 1 as a wire drive device,
3 to 5 are partially cutaway side views showing different operating states of the embodiment shown in FIG. 1, respectively. FIG. 7～
FIG. 8 is a perspective view showing different embodiments of the absorption mechanism of the present invention.

The embodiment of the mechanism of the present invention shown in FIG.
), a first pulley (8) fitted so as to rotate together with the shaft (2), and a second pulley (4) rotatably and movably disposed on the shaft (2) in the axial direction. It has

The first pulley (8) and the second pulley (4) are in contact with each other on one side, and a first ratchet tooth (3a) and a second ratchet tooth (4a) are provided on the periphery of the side surface, respectively.
They are carved so that they interlock with each other. Second pulley (
4) is urged toward the first pulley (8) by an elastic member (5) inserted between the second pulley (4) and the casing (1). Further, on the other side of the second pulley (4), a first annular uneven portion (6) as shown in detail in FIG. 6 is formed, and the inner bottom surface (1a) of the casing (1) An annular second uneven portion (7) that can be fitted into the first uneven portion (6) is formed on. Those uneven parts (6) and (7) are formed when the first wire (1υ winding operation is completed, for example, the movable member 06 of the remote control system in Fig. 2) comes into contact with the stopper (E). Wires (11), (b) so that the respective convex parts are in contact with each other.
The length of the stopper (118) M) is adjusted. The outer periphery of the first pulley (3) has a locking hole (6b
) is bored, and the first wire (11) has a locking metal fitting (11aJ) fixed to the terminal that is locked to the locking hole (3b) and is wound around the outer circumference of the first pulley (8). , is roughly guided to the outside of the casing (1).The direction in which the first wire 01) is wound around the outer circumference of the first pulley (3) is as follows: On the other hand, when the wire is rotated to idle (direction (B) in FIG. 1), the first wire is wound around the first pulley. A locking fitting (12a) fixed to the end of the second wire (B) is also locked to a locking hole (4b) drilled on the outer periphery of the second wire (B), and the second pulley (4) When the wire is rotated so as to idle around the first pulley (3) (direction (A) in FIG. 1), the direction in which the second wire is wound around the 21st pulley, that is, the first wire 01 ) is wound in the opposite direction and roughly guided to the outside of the casing (1). (21) is a lever fixed to the shaft end of the shaft (2) as a driving means for rotating the first pulley (3).

Next, the operation when the wire elongation absorbing mechanism constructed as described above is used as the drive device (1141J) of the driven device αη shown in FIG. 2 will be explained.

The driven device αη shown in FIG.
The movable member 06) has the same configuration as 0η) in the figure and is slidably provided on the guide member) and the guide member).
and a stopper (E) for stopping sliding of the guide member (16).

First, move the first pulley (3) with the arrow (A) using lever QI).
) direction, the second pulley (4) also rotates in the direction of arrow (A) since the ratchet is in the engaging direction.

In this case, as shown in FIG. 3, the second pulley (4) is urged in the direction of the arrow (IIi) by the elastic member (5), so it is separated from the inner bottom surface (1a) of the casing (1). , Therefore, the second pulley (4) has an uneven portion (6),
It can rotate freely without being hindered by (γ). As a result, the second wire (b) is wound around the second pulley (4), and the tension of the second wire (b) causes the movable member 06) of the driven device aη to slide in the direction of the arrow (0).

Note that the first wire (11) is connected to the arrow CA of the first pulley (3).
) direction, it is sent out from the first pulley (8).

As described above, when the lever e0 is rotated in the direction of the arrow (A), the first boot 9 (8) and the second pulley (4) rotate together, so that the elongation of the wire is not absorbed.

Next, move the first pulley (3) with the arrow (B) using the lever Q0.
) direction, the wire (11),
(b) holds sufficient tension, the torque is transmitted from the first pulley (3) to the second pulley (4) through the first pulley θ1), the movable member 06) and the second wire ( The second wire (b) is pulled out from the second pulley (4) according to the amount of winding of the first wire (11). As a result, the first pulley (3) and the second pulley (4)
) rotate at the same time and do not absorb any further elongation of the wire (e.g. elastic elongation of the wire). Note that the second pulley (
Since the rotational torque directly transmitted to the second ratchet tooth (4a) of 4) is extremely small, the second pulley (4)
The force pushed in the direction of the arrow (F) due to the rotation of the pulley (3) does not overcome the biasing force of the elastic member (5), and therefore the second pulley (4) is pushed in the direction of the arrow (1'). Don't move. Therefore, the uneven portions (6) and (7) are
Rotation of the pulley (4) is not hindered.

Such a winding operation of the first wire (11) onto the first pulley (3) is performed when the movable member (16) is stopped by the stopper (]8).
is completed by touching the lever, and then the lever (
21) when trying to rotate it in the direction of arrow (B),
The tension of the first wire (11) is no longer transmitted to the second wire (12). Therefore, torque is transmitted directly from the first pulley (3) to the second pulley (4) through the ratchet teeth (5a
), (4), and therefore, the second pulley (4) receives a pressing force in the direction of arrow (F) by No. 11-9 (3). However, at that point, the second pulley (4) The uneven portion (6) formed on the other side of the casing (1) and the uneven portion (7) formed on the inner bottom surface (1a) of the casing (1) are in contact with each other. (see Figure 4), the pressing force is applied to the casing (see Figure 4).
1), and the second pulley (4) cannot move in the direction of arrow (F). Therefore, the 21st-li (
Only the rotational component of the force directly received from the 11th pulley (3) acts on the wire 4), and the wire rotates only slightly in the direction of arrow (B) together with the first pulley (3). absorption of elastic elongation is prevented.

Next, move the first pulley (8) with the arrow (B) using the lever.
) direction, the wire (11),
(When permanent elongation occurs in (2), the first pulley (
The force is transmitted from the second pulley (4) to the second pulley (4) using a wire (1υ
, (b), but directly to the ratchet tooth (3a).
), (4&). Therefore, before the winding operation of the wire (11) to the eleventh li (3) is completed, for example, the movable member (16)
When sliding in the direction D), the second pulley (4) moves in the direction of the arrow (F) due to the axial component force received from the first pulley (S).
) while being pressed in the direction of rotation, the 11th-
It is rotationally driven in the direction of arrow (B) together with li (3). Therefore, the uneven portion (6) of the second pulley (4)
) when it fits into the uneven part (7) and rotates to the hanging position (
In this embodiment, the second pulley (4) moves in the direction of the arrow (F), so that the ratchet teeth (3a) and (4a) move over each other and move in the direction of the arrow (F). 11
- pulley (3) and second pulley (4) rotate relative to each other. Therefore, the permanent elongation of the wire (1υ, (b)) corresponding to the rotation angle is absorbed by being wound around the 11th wire (8).

In the above embodiment, if the load on the movable member 06) differs depending on the direction of sliding force, for example, a balance spring 01) as shown in FIG.
The balance spring CIl+ is housed in the cavity c32 formed in the cavity c32, and both ends of the balance spring CIl+ are connected to the inner wall surface 61 of the six cavities of the 21st-li (8) and the inner bottom surface (of the casing (1)).
It is preferable to bias the second pulley (4) in the direction of the arrow (A) by engaging the surface of the post C34) projected in 1a), thereby equalizing the load and reducing the lever operating force. It can be reduced.

Further, the wire elongation absorption mechanism of the present invention is applicable not only to the case where the first pulley (3) and the second pulley (4) are in direct contact as in the above embodiment, but also to the case where the first pulley (3) and the second pulley (4) are in direct contact with each other as shown in FIG. The pulley (8) and the 21st pulley (4) are the idle gear hIl,
It can also be used in cases where there is indirect meshing due to hz.

The shapes of the uneven portions (6) and (γ) in the present invention are formed as fan-shaped protrusions (6a) and (7a) arranged at equal intervals on the circumference, respectively, as shown in FIGS. 1 and 6. It is preferable to
, (7b) can be brought into reliable contact with each other, and a braking function can be provided to stop the rotation of the second boolean IJ (4=) when the wire elongation is absorbed.

Further, it is preferable that the end surfaces (6b) and (7b) are formed in a tapered shape, thereby making it easy to fit the uneven parts (6) and (7) into and out of each other.

Furthermore, the uneven portion (7) of the casing (1) in the present invention
In addition to being engraved directly on the inner bottom surface (1a) of the casing (1), a disc with uneven parts formed thereon can be fixed to the inner bottom surface (1a) of the casing (1) at any angle. This makes it easier to adjust the protrusions to abut each other at the operating end of the driven device.

As shown above, the wire elongation absorption mechanism of the present invention has the remarkable effect of selectively absorbing only the permanent elongation without absorbing the elastic elongation of the wire due to overload, and its practical value is It is extremely large.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the absorption mechanism of the present invention, FIG. 2 is a schematic perspective view showing an embodiment of a remote control system employing the mechanism shown in FIG. 1 as a wire drive device,
3 to 5 are partially cutaway side views showing different operating states of the embodiment shown in FIG. 1, and FIG. 6 is a perspective view showing an embodiment of the uneven portion of the second boob according to the present invention. 7 and 8 are perspective views showing different embodiments of the absorption mechanism of the present invention, and FIG. 9 is a perspective view of a remote control system employing the conventional absorption mechanism. (Main symbols in the drawings) (1): Casing (8): First pulley (5a): First ratchet tooth (4): 21st pulley (4a): Second ratchet tooth (5): Elastic member (6 ): First uneven portion (7): Second uneven portion (U): First wire (12): Second wire (15) Ni guide member (16): Movable member (E): Stopper): Lever Fig. 5 Figure 4 O8 Ward = 397-

Claims (1)

[Claims] 1. A casing, a first boot rotatably provided within the casing and having first ratchet teeth carved on the periphery of one side surface, and a drive means capable of rotationally operating the first boot; A second ratchet tooth is rotatably and axially movably provided in the casing, and has second ratchet teeth carved on the periphery of one side surface to mesh with the first ratchet teeth.
a pulley; an elastic member that biases the second bobbin toward the second ratchet tooth in the axial direction thereof; The first wire is unwound from the outer periphery of the first pulley by a rotational operation to the 21st pulley, and the terminal is latched to the outer periphery of the 21st pulley, and by the rotational operation of the drive means in the ratchet engagement direction, the second a second wire wound around the outer periphery of the pulley, and an annular wire on the other side of the second pulley.
A first uneven portion is formed, and a second annular uneven portion that can fit into the first uneven portion is formed on the inner bottom surface of the casing facing the other side surface, and the winding operation of the first wire is completed. The wire elongation absorbing mechanism is configured such that the first uneven portion and the second uneven portion are brought into contact with each other at the point when the first uneven portion and the second uneven portion are brought into contact with each other.