JPS6018652A - Regulator for tension of wire - Google Patents

Abstract

PURPOSE:To always perform smooth control, by a method wherein a swing lever is forced into press contact with each wire, and the swing lever is normally energized in a direction in which the wire is slightly bent. CONSTITUTION:The one end of a swing lever 15 is forced into press contact with a first wire 21 and a second wire 26 in a manner that, in case the one is stretched, the other is sharply bent, and in case the other is stretched, the former one is slightly bent. The swing lever 15 is normally energized in a direction in which the first wire 21 is slightly bent through the force of a spring 20. This prevents excessive tightening of the wires 21 and 26 even during excessive control. This prevents increasing of operating resistance due to excessive tension of the wires 21 and 26 and eliminates the need for a high control force, resulting in the possibility to always perform smooth control.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable tension adjustment device used in an automobile window opening/closing device or the like.

Conventionally, a loop-shaped cable, such as a thin wire, has been used as a power transmission means for converting rotational motion into reciprocating motion.

This wire is made by twisting multiple metal wires, and the disadvantage is that it permanently stretches and loosens under load, reducing the tension and preventing smooth transmission of power through the wire. There is. Therefore, the length of the wire is taken up and
Typically, an automatic absorption mechanism is used.

The one shown in FIG. 1 is an example of an automobile window opening/closing device that can absorb such wire stretching.
) with the first and second drums (c
) (d) are locked to each other via ratchet teeth, and the first drum (c
) is biased to one side, and can be rotated in forward and reverse directions via the handle (f).

In addition, the bracket (h) supporting the window glass (g) is movable up and down along the guide rail (l).
The other end of the first wire (k), which has one end fixed to f' (bracket) (h), is attached to the first drum (c). The other end of the two wires (1) is wrapped in a second drum (d).

Therefore, when the handle (f) is rotated left and right, the winding and unwinding operations of the first drum (c) and the second drum (d) cause the window glass (g) to reciprocate up and down. At the same time, the first drum (c) and the second drum (d) rotate relative to each other by a slight angle in only one direction to absorb the elongation of the wire by ratchet teeth, so that the elongation of one wire is This prevents the wire from becoming loose.

However, in such a window opening/closing device, even a slight stretch of the wire that occurs when the operating force of the handle is increased is caused by the spring (
e) The first drum (c) is biased in the winding direction.
), the clearances between guide rails, pulleys, etc., and the play necessary for smooth operation in bearings are eliminated, and excessive tension in the wire increases operating resistance and requires a large operating force. The present invention was made in order to improve the above-mentioned drawbacks, and the above-mentioned winding device equipped with a loosening prevention device is used in a transmission device to prevent the cable from being operated in an over-operated state. It is an object of the present invention to provide a tension adjustment device for cables that can prevent over-tightening of cables by generating appropriate slack.

Hereinafter, an embodiment in which the present invention is applied to an automobile window opening/closing device will be described in detail with reference to FIGS. 2 to 6.

(1) is a rail plate having vertical rails (Ia) (Ia), which is attached to an inner panel (3) of an automobile door by holding a pair of upper and lower leg pieces (2) (2). There is.

(4) is an inverted trapezoid-shaped driven mechanism, that is, a carriage, which is slidably supported along the rail (1a) and has a bracket (4aX4a) on its upper edge, as shown in the imaginary line. Holding the window glass (5) shown.

(6) is a drive mechanism, that is, a winding device, which has a roughly hexagonal configuration and includes a substrate (7) having a rising wall (7a) at the periphery; and a rotatably supported shaft (8), and a shaft (8) supported on this shaft (8).
A cable tension adjustment device provided between a pair of first and second drums (9) (10), these first and 21st rams (9) (QO), and a base plate (7). ttI) and drums (9
) (10) and a cover (121) attached to the substrate (7) so as to cover the board (10).

This board (7) is fixed to the inner panel (3), and a handle (not shown) is attached to the peripheral surface of the end of a shaft (8) that protrudes toward the inside of the vehicle so that it can be operated inside the vehicle. It's starting to linger.

The first drum (9) on the inside of the car and the second drum 00 on the outside of the car
) are locked to each other through ratchet tooth surfaces (9a), (10a) and k formed on opposing surfaces so that they can rotate only in the direction of winding the cable, as explained in the conventional example. A wave washer (131) provided on the outside of the vehicle and the second drum (10) is biased so as to press against each other.

A spiral spring I is interposed between the second drum (10) on the outside of the vehicle and the shaft (8). If elongation occurs, use the second drum 00 only on one side.
) is rotated relative to the first drum (9) to absorb the elongation of the wire.

Next, the cable tension adjustment device dll will be explained.

In FIG. 5, Q51 is a swinging lever, which has a shaft hole (15a) with a flange around the center of its base end.
A pair of long arms (15b) and short arms (15c) are rotatably fitted onto the outer peripheral surface of the first drum (9) and protrude in the radial direction at a predetermined time. There is.

A contactor, that is, a roller (181 (L91)) is rotatably attached to each free end of the long arm (+5b) and short arm (15c) with a shaft (16) (lη).

Further, a biasing means, that is, a tension coil spring (2) is installed between the long arm (+5b) and the cut and raised piece (7b) provided on the rising wall (7a). dynamic lever 0ω
is biased clockwise in FIG. 5, and is blocked by the base plate (7a) cut and raised from the substrate (7).

The starting end of the first wire (2υ) is fixed to the second drum 00, and the middle part thereof is wound around the second drum α0), and is wrapped around the roller (181) as shown in FIG. After passing through the bush (2) attached to the rising wall (7a), it passes through the fixed roller (23) provided at the upper end of the rail plate (1), and its terminal end passes through the bush (23) attached to the rising wall (7a). ).

The starting end of the second wire (26) is fixed to the first drum (9), and the middle part thereof is wound around the first drum (9) and attached to a bushing attached to the rising wall (7a). After passing through the hole, it passes through a fixed roller (251) provided at the lower end of the rail plate (1), and its terminal end is fixed to the lower part of the carriage (4).

In the automobile window opening/closing device configured as described above,
Handle (path shown) 'ff: When the shaft (8) is rotated clockwise in Fig. 5, the second drum (10
) winds the first wire 0υ, and the first drum (9) winds the second wire 0υ.
By unwinding the wire (26), the carriage (4) is indexed upwards and the window is closed by raising the pane (5).

Conversely, when the shaft (8) is rotated counterclockwise in FIG. 5, the first drum (9) winds the second wire (26), and the second drum (10) winds the first wire (2υ). By returning
The carriage (4) is indexed downward and the window opens.

As shown in Figure 5, when you turn the handle on the car after opening the window, the second wire (26) becomes tense and tries to straighten, pushing the roller on the short arm (+5c) side. move,
The swinging lever 05) of the cable adjustment device OD is rotated counterclockwise by a predetermined angle (α) against the biasing force of the tension coil spring (20), and as a result, as shown in FIG. As a result, the swing lever α■ cannot be rotated any further.

Such a swinging leno: - By the USO rotation, the first wire Cυ that comes into contact with the roller (18) on the long arm (T5b) side is bent more than the amount of deflection on the second wire (26) side, In this state, if you stop applying pressure to the handle or take your hand off the handle, the restoring force of the tension coil spring will cause the swing lever aS+ to move to the second position. The state shown in FIG. 5 is restored, and at this time, the first wire CD and the second wire (26) are
The desired loosening will occur by subtracting the small bend caused by the roller force from the large bend caused by the roller (18).

That is, the elongation of the first wire (2) due to excessive tension of the second wire (26) is not absorbed by the elongation absorption mechanism in the second drum 00), and remains as it is as a desired play. It will be done.

Therefore, when operating the handle again to raise the window glass (5) and close the window, there is a certain amount of play in the entire first wire (2+) and second wire, so the operation can be performed smoothly. be able to.

In addition, if excessive force is applied to the handle with the window closed, the mechanism that absorbs the stretch only works in one direction, so the mechanism that absorbs the stretch does not operate on the second wire. If you do not do this and loosen the force, the string will be re-tightened, so no excessive tension will be maintained.

As explained in detail above, in the cable tension adjustment device of the present invention, the cable winding mechanism is adapted to absorb slack in the cable by excessively winding one side of the cable. In a transmission device, a sling equipped with a slack prevention device prevents the adjacent parts of the cable that can absorb slack and the cable that cannot absorb slack, so that if one of them is under tension, the other will be greatly bent. Each end of the swinging lever supported by an appropriate fixed part is pressed against each other so that one side of the swinging lever will bend slightly when the other is bent and the other side is tensed. By constantly biasing the cable in the direction of slightly bending the cable, it is possible to prevent the cable from being over-tightened even during excessive operation, thereby reducing the increase in operating resistance due to excessive tension of the cable. It also has the advantage that it does not require a large operating force and can be operated smoothly at all times.

In addition, in the above embodiment, the cable adjustment device (11)
Although the winding drum is provided adjacent to the wire winding drum, the winding drum may be provided separately from the winding drum device.

In other words, if the first wire and the second wire are in a close positional relationship, there is a gap between these wires.
A tensioning device for the Vrx cord can be installed.

one! In addition, the cable tension adjustment device M of the present invention is not limited to an automobile window opening/closing device as in the embodiment, but is applicable to various power transmission devices using cables, such as a reciprocating one. Needless to say, the present invention can be applied to a cable tension adjustment device in an automatic door opening/closing device using cables.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a conventional automobile window opening/closing device, FIG. 2 is a front view of an automobile window opening/closing device to which an embodiment of the present invention is applied, and FIG. 3 is a schematic front view of a conventional automobile window opening/closing device. Figure 4 is a side view of only the collecting device.
The cross-sectional view taken along line A-A in FIG. 2, and FIGS. 5 and 6 are all partially cut away to explain different operating states of the winding device shown in FIG. FIG. (11 rail plate (4) carriage (5) window glass (6) winding device (7) board (9) first drum α0) second drum (tl) tension adjustment device (15)
Swinging lever a8ha91o -raα first wire
(23) Fixed loan 2nd wire 4th figure et al.

Claims (1)

[Claims] The cable winding mechanism is equipped with a loosening prevention device that absorbs slack in the cable by winding one side of the cable excessively. If one of the cables is strained, the other will bend a lot, and if the other is tensed, one of the cables will bend a little. Each end of a swinging lever supported by a suitable fixed part is pressed against each other so that the swinging lever can be bent sharply, and the swinging lever is
A cable tension adjustment device, characterized in that the cable is constantly biased in a direction in which the cable is slightly bent.