JPH0988417A - Window regulator - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To always guide a wire for driving a windshield to an appropriate position without using an outer tube. A wire 1 is laid between a guide pulley 31 of an upper wire guide 30, a guide body 41 of a lower wire guide 40, and a rotary drum 51 of a drive mechanism 40, and a portion 1A of the wire 1 is provided. A carrier plate movably guided to the guide rail 10 is connected to the guide rail 31, and the guide pulley 31 is eccentrically rotated with the movement of the wire 1 in the axial direction of the arrows A1 and A2 to change the movement trajectory of the wire 1. Let

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window regulator for opening and closing a window glass of an automobile, and more particularly to a window regulator using a wire for a transmission system of opening and closing driving force of the window glass. .

[0002]

2. Description of the Related Art Conventionally, as this type of window regulator, for example, one disclosed in Japanese Patent Laid-Open No. 60-168887 is known.

Such a window regulator movably guides a carrier plate (in the publication, "glass bracket") holding a window glass to a guide rail, and a pair of guide pulleys attached to both ends of the guide rail. A wire is laid between the guide rail and a rotary drum of a drive mechanism that is separated from the guide rail so as to form a substantially triangular plane, and the rotary drum rotates and the wire extends in the axial direction. By being moved to
The carrier plate moves with the windshield along the guide rail.

By the way, of the three parts corresponding to the three sides of the wire that is wound so as to form a substantially triangular plane,
Each of the portion between the one guide pulley and the rotary drum and the portion between the other guide pulley and the rotary drum are passed through and guided by the first and second outer tubes. One end of the first outer tube is positioned and held at a fixed position near one of the guide pulleys, and the other end is positioned and held at a fixed position near the rotating drum.
Similarly, one end of the second outer tube is positioned and held at a fixed position near the other guide pulley, and the other end is positioned and held at a fixed position near the rotating drum.

[0005]

In the above-mentioned conventional window regulator, since the wire is guided by using the outer tube whose both ends are held at the fixed positions, one end of the outer tube is not attached to the circumferential groove of the guide pulley. Even if the wire is moved in and out of the fixed position where it is held, and the winding position of the wire on the peripheral surface of the rotary drum changes as the rotary drum rotates, there is no possibility that the wire will come off the peripheral groove of the guide pulley.

If the outer tube is to be eliminated in order to reduce the number of parts, the wire is linearly laid between the rotary drum and the guide pulley, and the outer surface of the rotary drum is surrounded. When the winding position of the wire changes with the rotation of the rotary drum, the wire swings in the changing direction of the position, and the position of the wire entering and leaving the guide pulley changes. Therefore, in such a case, it is conceivable to provide an intermediate guide portion at a position near the guide pulley, and the intermediate guide portion regulates the wire entry / exit position with respect to the guide pulley.

However, when the runout of the wire is repeated in a certain direction due to the repeated rotation of the rotating drum,
There is a possibility that the portion of the intermediate guide portion in the deflection direction of the wire is locally worn, and the desired guide function cannot be achieved.

An object of the present invention is to provide a window regulator which can always guide a window glass driving wire to an appropriate position without using an outer tube.

[0009]

A window regulator according to the present invention comprises a carrier plate for holding a window glass, guide rails for movably guiding the carrier plate, and a pair of wires provided at both ends of the guide rail. In a window regulator having a guide, a wire that is bridged between the pair of wire guides and connected to the carrier plate, and a drive mechanism that moves the wire in the axial direction thereof, at least the pair of wire guides. One has a guide pulley in which a guide groove for guiding the wire is formed on the outer periphery and the rotation shaft is eccentric, and at a position facing a portion of the wire that moves in and out of the guide groove of the guide pulley, It is characterized in that an intermediate guide portion for guiding the portion of the wire is provided.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 10 is a guide rail,
It is attached to the door of an automobile with the right end side in FIG. 1 facing upward and the left end side facing downward. In the following, the right end of the guide rail 10 in FIG. 1 is referred to as the upper end, and the left side thereof is referred to as the lower end. On the guide rail 10, a carrier plate 20 holding a window glass (not shown) is movably guided. Between the pair of upper and lower wire guides 30 and 40 provided at both ends of the guide rail 10 and the rotary drum 51 of the drive mechanism 50 integrally connected to the intermediate position of the guide rail 10, a substantially triangular plane is formed. The wire 1 is laid so as to form the wire 1 and the portion 1A of the wire 1 located between the wire guides 30 and 40 is connected to a fixed position of the carrier plate 20. In FIG. 1, 1B is a part of the wire 1 located between the rotary drum 51 and the upper wire guide 30, and 1C is a part of the wire 1 located between the rotary drum 51 and the lower wire guide 40. is there.

A spiral groove 51A around which the wire 1 is wound is formed on the outer peripheral surface of the rotary drum 51, and the spiral groove 51A is rotated by a motor (driving section) 52 about an axis O which is substantially orthogonal to the winding direction of the wire 1. Driven. The rotation of the rotating drum 51 causes the wire 1 to move toward the arrow A1 or A
2, the carrier plate 20 moves up and down along the guide rail 10 in the directions of arrows B1 and B2 along with the window glass (not shown).

The upper wire guide 30 has a guide pulley 31 as shown in FIG. A guide groove 31A for guiding the wire 1 is provided on the outer peripheral surface of the guide pulley 31, and a first shaft portion 32A of the eccentric shaft 32 is integrated with the center portion by serration coupling. The eccentric shaft 32 is provided with second and third shaft portions 32B and 32C that are eccentric from the first shaft portion 32A. FIG.
4, O1 is the axial center of the first shaft portion 32A, O2 is the axial center of the second and third shaft portions 32B, 32C, and FIG.
In, L is the amount of eccentricity between the shaft centers O1 and O2. The second shaft portion 32B is rotatably fitted in the hole 33A of the guide body 33, and the annular groove 32D of the third shaft portion 32C is provided.
A retaining ring 34 that fits in the same keeps it from coming off. Therefore, the guide pulley 31 is an eccentric pulley that rotates around the eccentric shaft center O2. Guide body 33
Is fixed on a bracket 35 coupled to the upper end of the guide rail 10.

In the guide body 33, the guide pulley 31
At a position facing the portion 1A of the wire 1 that moves in and out of the guide groove 31A, a pair of intermediate guide portions 33B and 33C that regulate the position of the portion 1A in the direction orthogonal to the axis O1 and O2, An intermediate guide portion 33 that regulates the position of the portion 1A in the downward direction in FIG. 2 along the centers O1 and O2.
D is provided. A guide surface is formed on the intermediate guide portion 33D so as to be in sliding contact with the portion 1A of the wire 1. Similarly, a pair of intermediate guide portions for restricting the position of the portion 1B in the direction orthogonal to the shaft centers O1 and O2 is provided at a position facing the portion 1B of the wire 1 that moves in and out of the guide groove 31A of the guide pulley 31. 33E and 33F, and an intermediate guide portion 33G that regulates the position of the portion 1B in the downward direction in FIG. 2 along the axes O1 and O2 are provided. A guide surface is formed on the intermediate guide portion 33G so as to be in sliding contact with the portion 1B of the wire 1. Furthermore, the guide body 33
Is provided with a guide portion 33H facing the portion of the wire 1 guided in the guide groove 31A of the guide pulley 31.

On the other hand, the lower wire guide 40 has a guide body 41 in which an arc-shaped guide groove 41A is formed, and the wire 1 is guided in the guide groove 41A. In the present example, considering that the weight of the carrier plate 20, the wind glass, or the like is applied to the portion 1B of the wire 1 and the tension of the portion 1B increases, the upper wire guide 3
No. 0 was provided with the guide pulley 31, and the lower wire guide 40 was not provided with the guide pulley 31. However, like the upper wire guide 30, the lower wire guide 40 may be configured to include the guide pulley 31.

Further, the base plate 53 of the drive mechanism 50
Is provided with two intermediate guide portions 54 for guiding the portion 1A of the wire 1. This intermediate guide part 5
An arcuate guide surface 54A that is in sliding contact with the portion 1A of the wire 1 is formed at 4. Also, this intermediate guide portion 5
4 may be integrally formed with the metal base plate 53, or may be attached to the base plate 53 as a synthetic resin separate from the base plate 53 as shown in FIG. The intermediate guide portion 54 having a separate structure shown in FIG. 3 is attached to a fixed hole of the base plate 53 by the hook portion 54B.

Next, the operation will be described.

As described above, when the rotary drum 51 is rotationally driven by the motor 52, the wire 1 moves in the axial direction of the arrow A1 or A2, and the carrier plate 20 is guided to the guide rail 10 together with the window glass (not shown). It goes up and down in the directions of arrows B1 and B2. At that time, as the rotary drum 51 rotates, its spiral groove 51A
The winding position of the wire 1 inside is displaced in the direction along the axis O. Therefore, the portion 1B of the wire 1 swings in the directions of the axes O1 and O2 by the predetermined height H in FIG. 1 and repeatedly comes into sliding contact with the guide surface of the intermediate guide portion 33G of the guide body 33. Further, the portion 1A of the wire 1 is
The guide surface of the intermediate guide portion 33D and the guide surface 54A of the intermediate guide portion 54 are in sliding contact with each other.

On the other hand, with the movement of the wire 1 in the axial direction of the arrow A1 or B2, the guide pulley 31 of the upper wire guide 30 is centered on the axis O2 as indicated by the solid line and the two-dot chain line in FIG. Eccentric rotation. Therefore, the loci 1A and 1B of the wire 1 are swung by the width of W1 and W2 in FIG.

After all, the intermediate guide portion 33G of the guide body 33
On the other hand, in the portion 1B of the wire 1 that is repeatedly slidably contacted, the slidable contact position in the intermediate guide portion 33G changes within the range of the swing of the width W2. Therefore, the specific position of the intermediate guide portion 33G is not abraded in a concentrated manner, and the abrasion of the intermediate guide portion 33G is dispersed in the swing range of the width W2, and as a result, the durability of the guide body 33 is improved. To do. Similarly, the portion 1 of the wire 1 that is in sliding contact with the guide surface of the intermediate guide 33D and the guide surface 54A of the intermediate guide portion 54.
In the case of A, the sliding contact position on the guide surface 54A changes within the swing range of the width W1. Therefore, the specific position of the guide surface 54A is not abraded in a concentrated manner, and the wear of the guide surface 54A is dispersed in the swing range of the width W1. As a result, the durability of the intermediate guide portion 54 is improved. .

By the way, as in this example, the guide rail 1
In the case of the window regulator in which the drive mechanism 50 is integrated with the 0, the wire 1 can be installed in advance after being installed, and thus the wire 1 can be installed before the installation. Therefore, the wire can be easily routed without using a special part such as an outer tube as a guide means for the wire.

The eccentric position of the guide pulley 31 may be rotatably supported by a fixed shaft without using the eccentric shaft 32 that rotates together with the guide pulley 31. Any structure may be used as long as the core rotates.

[0023]

As described above, the window regulator of the present invention is provided with the guide pulley that rotates eccentrically as a wire guide for guiding the wire for transmitting the driving force.
Since the movement trajectory of the wire is changed by the eccentric rotation of the guide pulley, local abrasion of the intermediate guide portion that guides the portion of the wire entering and leaving the guide pulley is avoided, and the intermediate guide portion is prevented. The durability of can be improved. As a result, it is possible to always guide the wire to an appropriate position and realize the smooth movement of the windshield without using the outer tube as the wire guiding means.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the upper wire guide shown in FIG.

FIG. 3 is a perspective view for explaining another configuration example of the intermediate guide portion shown in FIG.

FIG. 4 is a plan view for explaining the operation of the upper wire guide shown in FIG.

[Explanation of symbols]

1 wire 10 guide rail 20 carrier plate 30,40 wire guide 31 guide pulley 31A guide groove 32 eccentric shaft 33 guide body 33B, 33C, 33D, 33E, 33F, 33G intermediate guide part 50 drive mechanism 51 rotary drum 52 motor (drive) Part) 54 intermediate guide part

Claims (2)

[Claims] 1. A carrier plate for holding a window glass, a guide rail for movably guiding the carrier plate, a pair of wire guides provided at both ends of the guide rail, and between the pair of wire guides. In a window regulator having a wire that is bridged and connected to the carrier plate, and a drive mechanism that moves the wire in its axial direction, at least one of the pair of wire guides is for guiding the wire to the outer periphery. An intermediate guide for guiding a portion of the wire to a position facing the portion of the wire that moves in and out of the guide groove of the guide pulley A window regulator characterized by having a section. 2. The drive mechanism includes a rotary drum having the wire wound around the outer periphery thereof and a rotation axis substantially orthogonal to the wire winding direction, and a drive unit for rotationally driving the rotary drum. The intermediate guide portion has a guide surface that faces a portion of the wire that is bridged between the guide pulley and the rotating drum, and that regulates displacement of the portion of the wire in the rotation axis direction of the rotating drum. The window regulator according to claim 1, wherein: