JPH0347094Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a wind regulator for a vehicle, and more particularly to a wire-driven wind regulator.

(Prior art and its problems) In vehicle window regulators, from the viewpoint of reducing size and weight, instead of the conventional arm type, a type in which a drive device and a window glass support bracket are connected with a wire is proposed. Various proposals have already been made. However, in such a wire type window regulator, if permanent elongation (elongation due to plastic deformation) occurs in the wire due to changes over time, the ability of the window glass to follow the movement of the drive device deteriorates, and the window glass cannot be moved to the desired position. Problems arise when stable support is no longer possible. As a countermeasure against this problem, there is a method of providing a tension pulley for absorbing the elongation of the wire and moving the tension pulley according to the elongation of the wire. However, with this method, the pulley must be moved by an operator, making the adjustment work complicated.

Therefore, in order to automate the absorption of wire elongation, the above drive device has been designed as shown in FIG. 6 (see Japanese Utility Model Application No. 17473/1983). That is, the drive device includes a drive shaft 31, guide grooves 32a and 33a on each outer periphery in which each end of a wire (not shown) is wound in opposite directions, and ratchet teeth 32b that engage with each other on opposing surfaces. , 33b, the first drum 32 is fitted to the drive shaft 31 so that it cannot rotate relative to it, and the second drum 33 is fitted to the drive shaft 31 so that it can rotate relative to it. 32 and 33 are biased by a leaf spring 34 in the direction of engagement of both ratchets 32b and 33b. When the wire is stretched, the second drum 33 resists the leaf spring 34 and rotates the ratchet teeth 32b, 33 when winding or unwinding the wire.
By moving in the direction of loosening the engagement of b, the first drum 32 rotates relative to the second drum 33 in the F direction in the figure, that is, in the direction of absorbing wire elongation,
Automatically eliminate loose wires. Note that relative rotation of the first drum 32 in the reverse F direction with respect to the second drum 33 is prevented by the engagement of both ratchet teeth 32b, 33b.

By the way, in the above device, the wire may not be wound accurately along each guide groove 32a, 33a. For example, if such a winding failure occurs, the second drum 33 will cause a large axial movement, causing the wire to be wound around both the ratchet teeth 32b, 33b is completely disengaged, and there is a problem in that the first drum 32 rotates relative to the second drum 33 in the reverse F direction in the figure, which is originally not allowed, that is, in the wire loosening direction.

(Means for Solving the Problems) The present invention has been made in order to avoid the above-mentioned problems. That is, the window regulator according to the present invention includes a glass support means for supporting the window glass, a guide means for slidingly guiding the glass support means, a wire connecting the glass support means and the driving means, and a wire connecting the glass support means to the driving means, and a wire connecting the glass support means to the driving means. comprising drive means for sliding the support means along the guide means;
The driving means includes a drive shaft having ratchet teeth on the outer periphery, a first drum around which one end of the wire is wound and fitted to the drive shaft in a relatively non-rotatable manner, and a first drum around which the other end of the wire is wound and the ratchet teeth. The second drum is fitted to the drive shaft so as to be relatively rotatable in the direction of removing slack in the wire through claw means provided on the inner periphery thereof so as to engage with the second drum.

(Effect of the invention) As described above, in the present invention, the one-way clutch mechanism for removing loose wire is composed of ratchet teeth provided on the drive shaft and pawl means provided on the second drum. engages in the radial direction of the drive shaft, so the operation of the one-way clutch mechanism is extremely reliable. That is, in the present invention, since the ratchet teeth and the pawl means engage in the radial direction of the drive shaft, there is no need for axial movement between the two drums in order to operate the one-way clutch mechanism. Axial movement does not disengage the ratchet teeth from the pawl means. Therefore, the relative rotation between the drive shaft and the second drum is always performed only in the direction of removing slack in the wire, and rotation in the opposite direction is reliably prevented. Thereby, the operability of the wind regulator can be made extremely good.

(Embodiment) An automobile window regulator as an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 4, this window regulator supports a support bracket 3 (glass support means) for a window glass 2 by a guide rail 1 (guide means) installed in a side door of an automobile in a substantially vertical direction. The window glass 2 is opened and closed by sliding the support bracket 3 in a desired direction along the guide rail 1 via a wire 4 using a hand-crank drive means D provided inside the side door.

One end of the wire 4 covered by the outer tube 12 is led out from the drive means D, and is led along the guide rail 1 to the support bracket 3 via guide blocks 5 and 6 provided at the upper part of the guide rail 1 and an upper roller 7. , here, after being fixed to the support bracket 3, the lower roller 8, the guide block 1
0, 11, and 5, the other end is introduced into the driving means D. The wire 4 connects the driving means D and the guide block 6.
In the section between the guide block 10 and the drive means D, the outer tube 12,
Covered and protected by 13.

Next, the internal structure of the driving means D will be explained. 1st~
As shown in FIG. 3, the drive means D accommodates a drive shaft 15 and first and second drums 16 and 17 in a bottomed cylindrical casing 14, and the open end of the casing 14 is connected to the outside of the casing. It is configured to be closed by a cover 18 that is raised toward the side. Above drive shaft 1
5, one end of the small diameter portion 15a is the casing bottom portion 20.
The proximal end of the handle 21 extending in the radial direction of the drive shaft is connected to the other end corner 15b which protrudes to the outside of the casing through the hole of the raised part 18a of the cover 18. Fixed.

A spiral guide groove 16 is formed on the outer periphery of the first drum 16.
a is provided, and the large diameter portion 1 in the second drum 17
A guide groove 17b continuous to the guide groove 16a is formed on the outer periphery of the guide groove 7a. The guide groove 16a is the first
It goes around the outer circumference of the drum several times, while the guide groove 17
b revolves around the outer periphery of the large diameter portion of the second drum about once.
A large-diameter locking tool (not shown) provided at one end of the wire 4 fits into the locking groove 16b at the upper end of the first drum.
fixed, and one end side 4 of the wire near the locking tool
A is wound around a portion of the guide groove 16a close to the cover 18 in the reverse A direction in FIG. 3 when viewed from the above-mentioned locking tool. On the other hand, a large-diameter locking tool (not shown) provided at the other end of the wire 4 fits into a locking groove 17c of the second drum large-diameter portion 17a.
The other end of the wire 4b is wound around the guide groove 17b and the bottom portion 20 of the guide groove 16a in the direction of FIG. 3A when viewed from the locking tool in the locking groove 17c.

The first drum 16 is fitted into the center corner portion 15c of the drive shaft 15 in a small diameter square hole portion 16c so as to be relatively non-rotatable. Further, the second drum 17 is fitted to the drive shaft 15 at the inner periphery of the small diameter portion 17d so as to be relatively rotatable, and the outer periphery of the small diameter portion 17d is fitted to the first drum 16.
The outer periphery of the medium diameter portion 17e is in the medium diameter round hole portion 16d.
They are respectively fitted into the large diameter round holes 16e of the drum 16 so as to be relatively rotatable.

A one-way clutch mechanism is provided between the drive shaft 15 and the second drum 17. That is, ratchet teeth 15d are formed on the outer circumferential portion of the drive shaft 15 adjacent to the small diameter portion 15a at one end. On the other hand, at opposing positions on the inner periphery of the middle diameter portion 17e of the second drum 17, there is a base portion 22a that extends substantially in the circumferential direction of the second drum 17, and a second drum that is inclined at an obtuse angle with respect to the base portion 22a in the radial direction of the second drum. In contrast, the inclined portion 22b extends in a direction slightly offset to the right in FIG.
A plurality of support grooves 22 having a substantially L-shaped cross section are formed at intervals corresponding to the pitch of the ratchet teeth 15d. Each of the inclined portions 22b gradually becomes wider as it goes inward in the radial direction of the second drum 17. A pawl spring 23 having a base portion 23a and a slope portion 23b corresponding to the support groove 22 is fitted into each support groove 22, and the tip of the slope portion 23b of the pawl spring 23 engages with the ratchet tooth 15d.
As a result, the drive shaft 15 (and the first drum 16) is moved toward the second drum 17 by arrow A in FIGS. 1 and 3.
Relative rotation is possible only in the direction. As described above, since the inclined portion 22b of the support groove 22 becomes wider as it goes radially inward, the inclined portion 23b of each pawl spring 23 can be slightly bent in the circumferential direction of the second drum. Therefore, the relative rotation of the drive shaft in the direction of arrow A with respect to the second drum 17 is performed extremely smoothly.

The boss 20a and the large diameter portion 17 of the second drum 17
A spiral spring 24 is housed in the space between the inner peripheries a,
The inner circumferential bent end of the spiral spring 24 is a boss 20a.
The bent ends on the outer peripheral side are respectively engaged with the locking portions on the inner circumference of the large diameter portion of the second drum. The second drum 17 is biased by the spiral spring 24 in the opposite direction A in FIG.

A cap-shaped sleeve 25 is fitted onto the drive shaft 15 within the raised portion 18a of the cover 18 by press fitting or the like, and the top of the raised portion 18a and the sleeve 25
A coil spring 26 is arranged between the lower end flanges 25a. The coil spring 26 has a flange 25a.
The first and second drums 16 and 17 are urged toward the bottom portion 20 through.

Next, the operation will be explained. 1, 3 and 4, when the handle 21, that is, the drive shaft 15 is rotated in the direction of arrow A (clockwise), the first drum 16
are integrally rotated in the direction A, and one end side 4 of the wire 4
a moves in the direction B in FIG. 3 and is wound up by the first drum 16. Further, the rotational force of the first drum 16 is transmitted to the second drum 17 via the wire 4,
The other end side 4b of the wire 4 moves in the C direction and is unwound from the second drum 17. Along with this, wire 4
The portion 4c existing within the guide rail 1 moves in the E direction in FIG. 4, and the window glass 2 slides along the guide rail 1 in the downward direction, that is, in the opening direction.

In the lowering operation of the window glass 2, if the wire 4 is not loosened due to permanent elongation or the like, when the first drum 16 starts to rotate in the direction A together with the drive shaft 15, the rotational force is immediately transferred to the second drum through the wire 4. 17, so the first drum 16
The winding of the one end side 4a and the unwinding of the other end side 4b by the second drum 17 are started at the same time. On the other hand, if there is slack in the wire 4, the second drum 17 is moved in the opposite direction by the spiral spring 24 as described above.
The first drum 16 is biased in the direction A to provide a braking force against rotation in the A direction, and the first drum 16
Since it can rotate relative to the drum 17 in the A direction, even if the first drum 16 starts rotating in the A direction, the second drum 17 does not start rotating immediately.
By rotating only the first drum 16 by a predetermined angle, the slack in the wire 4 is removed and the wire 4 begins to rotate only when a predetermined tension is applied to the wire 4. In this way, in this embodiment, the slack in the wire 4 is automatically removed when the window glass 2 is lowered. Note that since each pawl spring 23 can be bent in the circumferential direction of the second drum, as described above, the relative rotation of the first drum 16 with respect to the second drum 17 is performed extremely smoothly even when there is slack in the wire 4. As a result, the operating feeling of the handle 21 when removing loosening can be improved.

If it is desired to move the window glass 2 in the upward direction, that is, in the closing direction, the drive shaft 15 may be rotated in the reverse A direction using the handle 21. Drive shaft 15 and first drum 16 for second drum 17
Since relative rotation in the reverse A direction is not allowed, in this case, the drive shaft 15 and the first and second drums 16, 1
7 rotates integrally. In other words, when the window glass 2 is raised, even if there is slack in the wire 4, the slack is not removed. Note that since the operation to raise the window glass 2 is performed against the force of gravity acting on the window glass 2, the operating force of the handle 22 during the upward operation is greater than that during the downward operation. drum 1
7 is biased in the reverse A direction (corresponding to the upward direction) by the spiral spring 18, so that the handle operation force during the upward operation can be reduced accordingly.

FIG. 5 shows a modified example. Each of these modified examples extends in a direction that is slightly offset to the right in FIG. A substantially arc-shaped claw member 28 having a plurality of claw-like protrusions 27 (claw means) that engages with the key 17e on the inner periphery of the second drum 17
The claw member 28 is fitted and fixed to the inner circumference of the second drum 17 via a key groove 28a provided on the outer circumference of the claw member 28 correspondingly. Note that the operation of this modification is substantially the same as that of the previous embodiment, so a description thereof will be omitted.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a partially broken main part of the driving means in a wind regulator according to the present invention, FIG. 2 is a vertical sectional view of the driving means, and FIG.
4 is a perspective view of a wind regulator according to the present invention; FIG. 5 is an exploded perspective view showing a modified example of the driving means with a part cut away; FIG. FIG. 6 is an exploded perspective view of a main part of a driving means in a conventional window regulator. 1... Guide rail (guide means), 3... Glass support bracket (glass support means), 4...
Wire, 15... Drive shaft, 15d... Ratchet tooth, 16... First drum, 17... Second drum,
23...Claw spring (claw means).

Claims (1)

[Claims for Utility Model Registration] A glass support means for supporting a window glass, a guide means for slidingly guiding the glass support means, a wire connecting the glass support means and a driving means, and a wire for connecting the glass support means via the wire. In a wind regulator equipped with a drive means for sliding along a guide means, the drive means has a drive shaft having ratchet teeth on the outer periphery, one end of a wire is wound around the drive shaft, and the drive shaft is fitted to the drive shaft in a relatively non-rotatable manner. Relative rotation in a direction in which the first drum and the other end of the wire are wound and the slack of the wire is removed from the drive shaft through pawl means provided on the inner periphery so as to engage with the ratchet teeth. A wind regulator comprising a second drum that is removably interlocked with the second drum.