JPS6012497A - Absorbing mechanism of stretching of wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 absorbing mechanism (hereinafter simply referred to as an absorbing frame structure) 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 61G', 2 are each wired in a tensioned state as shown in FIG. A driving device 6→ having a pulley 6 wound in the opposite direction, and a wire 61) which is slidably or rotatably provided on a guide member 6Q, etc.
, and a driven device 5η having a movable member (A) with the other end of the pulley 6 (arrow (A) locked).
, (B) direction, winds one of the wires 5L52 around the pulley 53 and unwinds the other, thereby moving the movable member (to) in the arrow (0) direction or (D
There are known devices (for example, window regulators) that are configured to perform reciprocating (or rotational) operation in the ) 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 6a to the driven device 6η. 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. 972, Japanese Patent Application No. 1983-96985, Japanese Patent Application No. 1987-1
95979 etc.).

The basic structure of these absorption mechanisms is that the pulley 63 in FIG.
, the second pulley (8) is divided into two parts, and ratchet teeth 03) and H are carved on the opposing sides of both parts, respectively. This has the function of absorbing permanent elongation of the wire by causing the first 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 6 and the guide member 6 becomes temporarily large, or if the movable member (7) If the lever shaft υ is further driven in the direction of arrow (B) after being stopped by the stopper bar 6, that is, after the winding operation of the first wire 6B is completed, the first pulley (6) and the second The pulley (8) is rotated relative to the first wire all (eventually the second
(extending to the wire 6) causes excessive elastic elongation,
Furthermore, there are cases where the engagement of the ratchet teeth (18) and (14) progresses to a state in which the rigidity play of each part is absorbed. Excessive elastic elongation of such a wire has the disadvantage of causing permanent elongation, and also causes bending deflection of the rotation shafts of pulleys (6), (8) and other members, making the operation of the operating system difficult. There is a drawback.

Therefore, the inventor of the present invention has conducted extensive research to eliminate the drawback of tilting, and has found that when the wire elongation absorption mechanism is configured as described below, the ratchet teeth are The present invention was completed based on the completely new discovery that the ratchet teeth do not absorb the elastic elongation of the wire by releasing the meshing.

That is, the present invention includes: (&) 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. (Q) a drive member in which at least one edge in the circumferential direction of the cutout portion is formed in a tapered shape; The first ratchet tooth is provided in the vicinity of the outer periphery of a second side surface opposite to the first fI surface on the flange side, and a circular a first pulley having at least one elongated hole extending in the circumferential direction; (d) adjacent to the first side surface of the first pulley;
and a second boot rotatably provided in the casing concentrically with the shaft and having second ratchet teeth that can mesh with the first ratchet teeth provided near the outer periphery of the side surface; (e) a ratchet separation means that is loosely fitted into the elongated hole of the first boob so as to be movable in the axial direction, and presses the second pulley in the axial direction by being pressed by one edge of the notch; f) an elastic means for pressing the first pulley and the second pulley against each other; The gist of this invention is a wire elongation absorbing mechanism having a power transmission wire wound in substantially one closed loop having a length of 4'79 m.

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

Fig. 1 is a partially cutaway side view showing one embodiment of the mechanism of the present invention, Fig. 2 is a sectional view taken along the line (X)-(X) of Fig. 1 (however, the casing is omitted), and Figs. 3 and 4. FIG. 2 is a sectional view taken along the line (A)-(7) showing different operating states; FIG. 5 is a schematic perspective view of a window regulator employing the mechanism of the present invention; and FIG. (Z) - (Z) line sectional view of , Figures 7 and 8 are partially cutaway side views showing different operating states of other embodiments of the mechanism of the present invention, and Figure 9 is a view of the mechanism of the present invention. It is a longitudinal cross-sectional view which shows another Example.

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 to the outside of the casing (1), and is rotated in the direction of arrow (A) or arrow (B) by, for example, a crank-type handle (II in Fig. 5).
) direction. A bottomed cylindrical flange (3) extending radially outward is fixed to the shaft (2) by welding or the like. The shaft (2) and the flange (3) constitute a driving member. As clearly shown in FIGS. 2 to 4, the flange (3) has a fan-shaped notch 00 and a notch (5) formed along its outer periphery. A smoothly curved or sloped taper part (4) is formed at at least one edge of the cutout part (5).

A first pulley (6) and a second pulley (8) are rotatably provided on the outer periphery of the shaft (2) adjacent to the flange (3) in that order. 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 (lo) is interposed between the second pulley (8) and the casing (1), so that the second pulley (8) is connected to the first pulley (
6) is constantly pressed against the side.

The first side surface (6a) on the flange (B) side of the first pulley (6)
) and the side surface (8a) of the second pulley (8) adjacent to the first pulley (6) are provided with a first ratchet tooth (13) and a second ratchet tooth, respectively. 04) are carved so as to mesh with each other.

A fan-shaped protrusion 6 that can be engaged with the fan-shaped notch is protruded from the first side surface (6a) of the first pulley (6),
Further, it penetrates from the first side surface (6a) to the second side surface,
) is formed in an arc-shaped elongated hole extending in the circumferential direction. On the first side surface (6a) side of the edge of the elongated hole α, a ratchet separation means is provided, which once extends to the second side surface (6b) side, and a second side surface (
6b) One end of a flexible bent piece 06) which is folded back at the near piece and whose free end 07) protrudes from the first side face (6a) is fixed.

The free end (16 &) of the bent piece 06) is the flange (3)
The tapered portion (4) of the cutout portion (5) can be easily bent so that the tapered portion (4) of the cutout portion (5) comes into contact with the piece 06.
) is further folded back so as to be pressed in the direction of the arrow (a).

The outer peripheries of the first pulley (6) and the second boolean 9 (8) are provided with a first wire G that substantially forms one closed loop, similar to a conventional wire elongation absorption mechanism. υ and the second wire (
! One end of each gong is locked and wrapped in opposite directions. The direction of wrapping is the first pulley (
6) to the second pulley (8) with ratchet teeth Qa),
When rotated in the direction in which H is engaged (direction of arrow (A) in Figure 1), the first wire e1) is unwound from the first pulley (6), and the second wire e1) is connected to the second pulley. (8) is the winding direction.

Next, the wire elongation absorbing mechanism constructed in a diagonal manner is shown in FIG. 5 in the window regulator driving device T:
The effect when used as J4 will be explained.

The driven device 67) shown in FIG. 5 has the same configuration as the conventional driven device, and includes five guide members and the guide member 69
A movable member l that is slidably provided on the! i0, and a stopper 6 for stopping the sliding of the movable member (a).

The mechanism of the present invention exhibits substantially the same effect as the conventional mechanism as long as the movable member 60 slides smoothly.

That is, in Figs. 1 and 2, the shaft (2) is connected to the ratchet teeth (
13) When rotating in the direction of arrow (A), which is the direction of engagement of (I4), the fan-shaped notch (A) of the flange (3) pushes the fan-shaped projection can in the direction of arrow (A), thereby The first pulley (6) is also rotated in the direction of arrow (A).

In this case, the notch (5) and the bent piece 06) do not come into contact with each other. Furthermore, ratchet teeth α3), 0→
Since this is the meshing direction, the second pulley (8) also rotates in the direction of arrow (A) together with the first pulley (6). The second wire H is thus wound around the second pulley (8), the first wire 01) is unwound from the first pulley (6), and the loop of wire circulates in one direction, e.g. The movable member 6fjl is moved in the direction of arrow (0). In this case, even if permanent elongation occurs in the wires e1), 2), it will not be absorbed.

Next, when rotating the shaft (2) in the direction of the arrow (B), which is the direction in which the ratchet teeth (13) and Q') are idling, the tapered part (4) of the notch (5) of the flange (3) The free end (16a) of the bent piece 06) is pushed in the direction of the arrow (E), thereby the second pulley (8) moves in the direction of the arrow (K), and the teeth of the ratchet teeth (18) and (+4) are adjusted. It comes off. Further, since the fan-shaped notch (A) pushes the protrusion 0η on the flat plate 1 in the direction of the arrow (B), the first pulley (6)
B) rotate in direction. Therefore, the first wire (21) is wound around the outer circumference of the first pulley (6). In that case, the effect differs as described below depending on whether or not the wire is permanently elongated.

If there is no permanent elongation in the wire, the wire is stretched from the second pulley (8) to 7j by the amount wound around the first pulley (6).
[The first pulley (6) and second pulley (γ
) 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.

If permanent elongation has occurred in the wires e1), 2), the second pulley (8) will be immediately pulled out by the braking force of the wave onesie α [phase] or the balance spring (c32 in Fig. 9), which will be described later. It does not rotate.

Therefore, only the first pulley (6) rotates in the direction of arrow (B). Therefore, the permanent elongation of the wire is the 11th (6)
The tension is absorbed by being wound around the wire, 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 permanent elongation has not occurred, or when the permanent elongation of the wire has been absorbed by the above action. After the movable member 6 contacts the stopper hammer, or the movable member 60 and the guide member 6ω
, or if a large sliding resistance temporarily occurs between the window glass and the sash (not shown), when attempting to further rotate the shaft (2) in the direction of the arrow (B), the original It has an excellent effect.

That is, when rotating the shaft (2) in the direction of the arrow (B) as described above, the bent piece (16)
5) is pushed in the direction of the arrow (K), and the ratchet teeth Qa) % ('') are separated from each other.

Therefore, in that state, the first wire Gl! Even if the elastic elongation of υ is wound around the first pulley (6), the ratchet teeth θ
8), 04 meshing position does not advance. That is, the fourth
When the torque on the shaft (2) is loosened from the state shown in the figure, the first wire (
21), the first pulley (6) is returned in the direction of the arrow (A), and the bent piece (16) is accommodated in the notch (5) again as shown in FIG. 2 pulleys (
8) returns in the direction of the arrow ('y). Therefore, the ratchet teeth (IL%) mesh only after the first wire 01) recovers (contracts) to a state where an appropriate tension is applied, and is prevented from absorbing the elastic elongation of the wire.

Although in the embodiment described above, the first pulley (6) is rotated by the engagement of the fan-shaped notch (7) and the fan-shaped protrusion G71, the present invention is not limited to this embodiment. For example, by increasing the rigidity of the bent piece 06), the notch part (5) and the bent piece 06
) may transmit torque from the shaft (2) to the first pulley (6).

Furthermore, the tapered portion 4) of the notch (5), the folding rate (7), and the second pulley (8) may be configured to move in the direction of the arrow (E). In normal use, torque can be transmitted from the flange (3) to the first pulley (6) via the tapered part (4), so it is necessary to provide the fan-shaped protrusion (4a) and the fan-shaped notch (4). In this case, the function of absorbing permanent elongation of the wire and the function of preventing absorption of elastic elongation when a secondary load is applied are the same as in the embodiment shown in FIG.

Furthermore, the bent portion θ6) and the cutout portion (5) are
It may be provided at one location each as in the embodiment shown in FIGS. 1 to 4, but it may also be provided at two or more locations.

As in the embodiment shown in FIGS. 1 and 2, a fan-shaped notch (to) is formed in the flange (3), and a fan-shaped protrusion GD that can be engaged with the fan-shaped notch (7) with play is provided in the eleventh ring. (6
), as shown in FIG.
It is preferable to provide a flexible protruding piece (to) at a position separated by ), so that when the bent piece (16) returns from the deformed state as shown in Fig. 4 to the state shown in Fig. 6. , the elasticity of the protruding piece allows it to return more smoothly.

Furthermore, before the notch (5) presses the bent piece 06) in the direction of the arrow (G), the fan-shaped notch (G) is configured to come into contact with the protruding piece (-), and the protruding piece (-) When giving a certain degree of rigidity to the fan-shaped notch (to)
Axial torque is transmitted from the shaft (2) to the first pulley (6) by the protruding piece until the force pushing the protruding piece (to) exceeds a certain level; When the shaft (goods) can no longer support the shaft torque, the protruding piece (to) bends, and the shaft (2) further rotates relative to the first pulley (6),
The notch (5) of the flange (S) is the bent piece 06)
Push out in the direction of the arrow (g) to separate the 0Φ check teeth 03) and α→. When configured in this way, the ratchet teeth (
11), ('→ are in mesh and the ratchet tooth is 0 only when a certain amount of torque is applied to the handle lever
3), (1→ is difficult to separate. At that time, the protruding piece (a) bent
Is the fan eI? Since it is supported by the first pulley (37a), it will not break and there is no gap (37a).
6) Even if torque is applied to the ratchet tooth α3
) and 0→ are separated, so the elastic elongation of the wire is not absorbed.

Note that the ratchet separating means in the present invention is not limited to the bent piece 06) as in the above embodiment, but may be an elastic piece (06) projecting obliquely from the inner wall of the elongated hole (as shown in FIGS. 7 and 8). 41 and an elastic piece (4) protruding from the side surface (8a) of the second pulley (8) and passing through the long hole
The tapered part (4) presses the second pulley (8) in the direction of the arrow (I) via the elastic piece (4G) and the protrusion aυ to ratchet the second pulley (8). Tooth (18), (1 → teeth separation, etc.)
Various ratchet separation means may be employed. In other words, the ratchet separating means referred to in the claims refers to the first pulley (
6) is loosely fitted into the elongated hole α so as to be freely movable in the axial direction, and is pressed in the axial direction by the tapered portion (4) formed at the edge of the notch (5) of the flange (3). 1 pulley (6
) and the second pulley (8), which means a means capable of transmitting a separating force against the pressing force of the elastic means, and one or both ends of which are connected to the first pulley (6) or the second pulley (8). 8) or each pulley (6L
It is not limited by whether it is independent from (8).

In the above embodiment, the wave washer (10) is interposed between the second pulley (8) and the casing (1), but as in the embodiment shown in FIG.
6) is provided so as to be movable in the axial direction with respect to the shaft (2), and the first
A coil spring (C) may be interposed between the pulley (6) and the flange (3), or an elastic member such as a wave washer may be interposed between the first pulley (6) and the casing (1). . In such an embodiment, as shown in FIG. 3, the tapered portion (4) of the notch (5) presses the free end (16&) of the folded piece (16) in the direction of the arrow (IIC). Possibly a folded piece (16
) is deformed as shown in FIG.
IP) direction. Therefore, in that case as well, the ratchet teeth α8) and (+4) are out of alignment and operate in the same manner as the embodiment shown in FIG.

That is, in the mechanism of the present invention, it is sufficient that either the first pulley (6) or the second pulley (8) is movable in the axial direction and is constantly pressed against the other pulley by an elastic member.

Furthermore, when the wire elongation absorption mechanism of the present invention is employed as a drive device for a window regulator, a conventionally known balance spring Oz is housed in the recess c33) of the second pulley (8) as shown in FIG. By locking both ends to the boss 041 of the casing (1) and the inner wall surface of the second pulley (8), the weight of the window glass can be balanced, making it easier to raise the window glass. Become.

Also, as shown in the two-dot chain line in Figure 2 or in Figure 9,
Covering the conventionally known brake spring C351 (1b
) and the flange (3), and are bent inward in the radial direction.
) is formed in the flange (3) with a fan-shaped cutout (
(a) and the respective end faces of the fan-shaped protrusion C (7) protruding from the side of the first pulley (6), the window glass may slide down due to vibrations of the car.
and the window glass is prevented from being pried open from the outside.

In addition, as a method of rotatably and concentrically supporting the first pulley (6) and the second pulley (8) within the casing according to the present invention, as shown in FIG.
In addition to being supported above, the main body (1a) of the casing (1)
Various modifications can be made, such as supporting it on a fixed shaft fixed to the side.

As shown above, the wire elongation absorption mechanism of the present invention can selectively absorb only the permanent elongation without absorbing the elastic elongation that occurs in the wire, so the wire tension can always be maintained within an appropriate range. It can produce excellent effects and its practical value is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing one embodiment of the mechanism of the present invention, Fig. 2 is a sectional view taken along the line (X)-(X) of Fig. 1 (however, the casing is omitted), and Figs. 3 and 4. FIG. 2 is a sectional view taken along the line (Y)-(7) showing different operating states; FIG. 5 is a schematic perspective view of a window regulator employing the mechanism of the present invention; and FIG. (Z)-(Z) line sectional view of , FIGS. 7 and 8 are partially cutaway side views showing different operating states of other embodiments of the mechanism of the present invention, and FIG. 9 is a cross-sectional view of the mechanism of the present invention. FIG. 10 is a longitudinal sectional view showing another embodiment, and is a schematic perspective view of a window regulator using a conventional wire elongation absorbing mechanism as a driving device. (Main symbols in the drawing) (1): Casing (2): Shaft (3) j Flange (4): Tapered part (5): Notch part (6): 1st pulley (8): 21st pulley ( 1o), wave washer 08): 1st ratchet tooth 04): 2nd ratchet tooth (1→: long hole θ6): bent piece Q]): 1st wire: 2nd wire Patent applicant Nippon Cable System Representative Patent Attorney Co., Ltd. Naso Asahi Tadate 1 Sword 2 Figure 3 Figure 6 (2) ? Figure 7 No. 90

Claims (1)

[Scope of 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 drive member having at least one edge in the circumferential direction of the cutout portion formed in a tapered shape; (C) the casing adjacent to the flange and concentric with the shaft; a second side surface opposite to the first side surface on the flange side, and having first ratchet teeth near the outer periphery thereof, and penetrating the side surface in the radial direction of the first ratchet teeth; , a first pulley having at least one elongated hole extending in the circumferential direction, and (d) the eleventh-
rotatably provided within the casing so as to be adjacent to the first side surface of the
a second pulley having second ratchet teeth that can mesh with the ratchet teeth near the outer periphery of the side surface; (θ) the first pulley;
a ratchet separation means that is loosely fitted into the elongated hole of the pulley so as to be movable in the axial direction, and presses the second boot in the axial direction by being pressed by one edge of the notch;
(f) elastic means for pressing the first pulley and the second pulley against each other; A wire elongation absorption mechanism having eight power transmission wires wound in opposite directions to form substantially one closed loop. 2. The ratchet separating means extends from the first side surface to the second side ml side of the inner wall surface of the elongated hole, and is folded back so that its free end protrudes from the first side surface side and meets the edge of the notch. 2. The wire elongation absorbing mechanism according to claim 1, characterized in that it is at least one flexible bent piece that abuts against each other.