JP3626039B2 - Door glass lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door glass lifting device provided on a door of an automobile or the like.
[0002]
[Prior art]
In general, an automobile door is provided with a door glass elevating device (window regulator) for elevating and lowering the door glass. For example, as in the conventional example described in Japanese Patent Application Laid-Open No. 10-102902, the door glass is slidably supported by the front and rear sashes, and the carrier plates are respectively locked to the pair of front and rear wire rope moving parts. A window regulator has been proposed in which the front and rear portions of the door glass are supported by a carrier plate.
[0003]
In the case where the door glass is driven up and down by a rope body such as a wire rope as in the door glass lifting device, a stopper member is required to regulate the position of the lower end (bottom dead center) of the door glass. Conventionally, it has been considered to provide this stopper member at the lower end of the sash, or at the lower panel that connects the lower ends of the front and rear sashes.
[0004]
[Problems to be solved by the invention]
In the case where the cable body is moved up and down by a driving pulley that is rotated by a motor like a power window, after the door glass reaches the rising end or the falling end, the motor continues to rotate to some extent, resulting in an increase in torque. As the supply current increases, the supply current to the motor is cut off.
[0005]
For this reason, when the door glass reaches the descending end, the door glass tries to push down the stopper member, while the rope body tries to pull up the pulley. For this reason, the longer the distance between the stopper member and the pulley, that is, the force transmission path, the larger the moment between them. That is, a large bending stress acts on the force transmission path, and if the rigidity of the members constituting the force transmission path is low, deformation or breakage may occur. For this reason, a reinforcing measure or the like for increasing the rigidity is required.
[0006]
Accordingly, an object of the present invention is to provide a door glass lifting device that can efficiently suppress the movement of the door glass by shortening the transmission path of the force for receiving the door glass.
[0007]
[Means for Solving the Problems]
The door glass lifting device according to claim 1 for fulfilling the above object is provided, wherein when the door glass reaches the bottom dead center, the glass lifting body abuts against a stopper rubber provided on the pulley shaft, and compresses the stopper rubber. Stop. At this time, the glass elevating body is supported by the pulley shaft via the stopper rubber. That is, the force transmission path for receiving the glass lifting body is substantially only the pulley shaft, so the force transmission path is very short. And, the force in the direction of pushing down the stopper rubber and the force in the direction of pulling up the pulley, that is, the force for driving the rope body upward are offset through the pulley shaft, and the glass lifting body is surely stopped. Become.
[0008]
The stopper rubber referred to in the present invention is a concept including not only synthetic rubber but also an elastic member such as a synthetic resin elastomer and a spring. In short, the stopper rubber is not particularly limited as long as it can elastically receive the glass lifting body.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a door glass lifting apparatus according to an embodiment of the present invention will be described with reference to the drawings.
An automobile door 10 shown in FIG. 4 includes a door module 12 incorporated in a door panel unit 11 mainly including an outer panel. The front portion of the door 10 is mounted on the vehicle body by a hinge member 13.
[0010]
The door module 12 includes a frame structure 20 that forms the skeleton thereof. The frame structure 20 includes a front sash 21 located on the front side of the vehicle, a rear sash 22 located on the rear side of the vehicle, an upper sash 23 located on the top of the door module 12, and a horizontal position located below the upper sash 23. An intermediate frame 24 extending in the direction, a lower frame 25 positioned at the lowermost part of the door module 12, and the like. The upper sash 23 has a shape along an upper edge 60a of a door glass 60 described later. A door glass lifting device 30 and a door latch mechanism 31 are attached to the frame structure 20.
[0011]
The door glass lifting device 30 includes a base plate 35 disposed between the intermediate frame 24 and the lower frame 25, and a pair of front and rear frame members 36 and 37 that are fixed to the base plate 35 and extend in the vertical direction. The lower ends of each of the frame members 36 and 37 are fixed to the lower frame 25.
[0012]
As shown in FIG. 5 and the like, upper pulleys 40 and 41 and lower pulleys 42 and 43 are provided at the upper and lower ends of the frame members 36 and 37, respectively. The lower pulleys 42 and 43 constitute pulley units 80 and 81 having a down stopper function according to the present invention, respectively. Details of the pulley units 80 and 81 will be described later. The base plate 35 is provided with a drive pulley 44 (wire drum) and a motor 45 for rotating the drive pulley 44. The motor 45 is a DC motor with a reduction gear that can rotate forward and backward using an in-vehicle battery (not shown) as a power source.
[0013]
A single cord body 50 made of a wire rope or the like is routed to these pulleys 40 to 44 in a state of crossing in an X shape. In other words, the cable body 50 is formed in a vertical direction between the front side moving portion 50a stretched between the front upper pulley 40 and the lower pulley 42 and the rear side upper pulley 41 and the lower pulley 43. The rear side moving portion 50b stretched, the first slant portion 50c slanted between the upper pulley 41 and the drive pulley 44, and the slant between the lower pulley 42 and the drive pulley 44. A second oblique portion 50d stretched and a third oblique portion 50e obliquely stretched between the upper pulley 40 and the lower pulley 43 are provided.
[0014]
The first and second oblique portions 50c, 50d and the third oblique portion 50e cross in an X shape. A carrier plate 61 that functions as a glass support member for supporting the door glass 60 is fixed to each of the intermediate portions in the vertical direction of the front side moving part 50a and the rear side moving part 50b. The door glass 60 and the carrier plate 61 constitute a glass elevating body 62 referred to in the present invention.
[0015]
One end side of the cable body 50, that is, the end portion of the first inclined portion 50c is locked to the drive pulley 44, and a length that allows the lifting and lowering stroke of the door glass 60 is wound around the drive pulley 44. ing. The other end side of the cable body 50, that is, the end portion of the second slanted portion 50d is also locked to the drive pulley 44, and a length that allows the lifting / lowering stroke of the door glass 60 is wound around the drive pulley 44. It has been.
[0016]
Therefore, when the drive pulley 44 rotates counterclockwise in FIG. 5, the first slanted portion 50 c of the cable body 50 is fed out from the drive pulley 44, and the second slanted portion 50 d becomes the drive pulley 44. The carrier plate 61 and the door glass 60 are lowered integrally by being wound and the front and rear moving parts 50a and 50b descending in synchronization with each other.
[0017]
When the drive pulley 44 rotates clockwise, the first slanted portion 50c is wound around the drive pulley 44, and the second slanted portion 50d is fed out from the drive pulley 44 to move the front and rear moving portions 50a, The carrier plate 61 and the door glass 60 rise together as the 50b rises in synchronization with each other. Then, when the upper edge 60a of the door glass 60 comes into contact with the upper sash 23, the rise of the door glass 60 is stopped.
[0018]
In the motor 45, when the door glass 60 reaches the rising end or the falling end and stops, the torque increases, so that the supply current to the motor 45 becomes excessive. In this embodiment, the control circuit detects that the supply current to the motor 45 has become excessive, thereby cutting off the current to the motor 45.
[0019]
After the door glass 60 reaches the descending end, the motor 45 tends to continue to rotate to some extent, so that the driving pulley 44 is slackened. In order to absorb this slackness, a tension mechanism 65 including a tension pulley or the like is provided in the first inclined portion 50c. Even when the door glass 60 reaches the upper and lower end, the motor 45 tends to continue to rotate to some extent, so that the driving pulley 44 is slackened. In order to absorb this slackness, a tension mechanism 66 including a tension pulley and the like is also provided in the second oblique portion 50d.
[0020]
The carrier plate 61 extends in the front-rear direction along the lower end portion 60 b of the door glass 60, and a locking portion 70 for fixing the front and rear moving portions 50 a, 50 b of the cable body 50 at two front and rear portions of the carrier plate 61. , 71 are provided. Both end portions of the carrier plate 61 are fixed to the door glass 60 by fixing members 72 such as screws. A glass support portion 73 and an auxiliary support portion 74 are provided in the middle portion in the longitudinal direction of the carrier plate 61. A lightening hole 75 (shown in FIG. 3) punched out by a press for weight reduction is formed at an appropriate portion of the carrier plate 61.
[0021]
As shown in FIG. 4, the front edge portion 60 c of the door glass 60 is in contact with a weather strip 76 provided on the front sash 21 so as to be slidable in the vertical direction. The rear edge portion 60d of the door glass 60 is in contact with a weather strip 77 provided on the rear sash 22 so as to be slidable in the vertical direction. That is, the door glass 60 moves up and down while being guided by the pair of front and rear sashes 21 and 22 while maintaining a close contact state with the weather strips 76 and 77 as the carrier plate 61 moves up and down. Become.
[0022]
Pulley units 80 and 81 including the pulleys 42 and 43 are provided below the door glass lifting device 30. These pulley units 80 and 81 include, as representatively shown in FIG. 1, pulley shafts 82 fixed to frame members 36 and 37, and pulleys 42 and 43 rotatably attached to the respective pulley shafts 82. A stopper bracket 83 attached to the pulley shaft 82, a stopper rubber 84 held by the stopper bracket 83, a guide member 85 for guiding the winding of the cable body 50, and the like. The stopper bracket 83 is shaped to wrap the lower side of the stopper rubber 84. The upper surface 84a of the stopper rubber 84 in the illustrated example is, for example, corrugated, but a circular or other appropriate stopper rubber may be employed.
[0023]
The stopper rubber 84 is located at a position facing directly below the lower end surface 61a of the carrier plate 61. When the door glass 60 is lowered to a predetermined position, that is, near the lower end, the lower end surface 61a of the carrier plate 61, that is, below the glass elevating body 62. The end surface comes into contact with the upper surface 84 a of the stopper rubber 84.
[0024]
Next, the operation of the door glass lifting device 30 provided with the pulley units 80 and 81 will be described.
In FIG. 5, when the drive pulley 44 is rotated counterclockwise by the motor 45, the first slanted portion 50c of the cable body 50 is fed out from the drive pulley 44 and the second slanted portion 50d is driven. When the front and rear moving parts 50a and 50b descend in synchronization with each other by being wound around the pulley 44, the glass elevating body 62 descends.
[0025]
Then, the lower end surface 61a of the carrier plate 61 contacts the upper surface 84a of the stopper rubber 84, and the lower end surface 61a of the carrier plate 61 is lowered to the position indicated by the symbol H in FIG. 1 while the stopper rubber 84 is compressed. At that time, when the deflection of the stopper rubber 84 reaches the limit, the glass elevating body 62 stops, and the current supplied to the motor 45 exceeds a predetermined value as the torque of the motor 45 increases. As a result, the rotation of the drive pulley 44 stops.
[0026]
Thus, when the glass elevating body 62 is stopped by the stopper rubber 84, the force that the glass elevating body 62 tries to push down the stopper rubber 84 and the force that the cable body 50 tries to pull up the pulleys 42 and 43 are generated. , They are offset via the pulley shaft 82. Here, the force transmission path from the stopper rubber 84 to the pulleys 42 and 43 is substantially only the pulley shaft 82, and the force transmission path is very short. The body 62 can be reliably stopped at the bottom dead center, and the possibility of deformation or breakage can be avoided.
[0027]
Moreover, since the bracket 83 holding the stopper rubber 84 is attached to the pulley shaft 82, the bracket 83 can be attached so as to be able to rotate to some extent around the pulley shaft 82. In that case, when the lower end surface 61a of the carrier plate 61 abuts against the stopper rubber 84, the stopper rubber 84 is in a posture such that the upper surface 84a of the stopper rubber 84 is compatible with the lower end surface 61a of the carrier plate 61. And the contact between the stopper rubber 84 and the glass elevating body 62 is further improved.
[0028]
When the drive pulley 44 rotates in the clockwise direction, the first slanted portion 50c is wound around the drive pulley 44, and the second slanted portion 50d is fed out from the drive pulley 44 to move the front and rear moving portions 50a, The glass elevating body 62 rises as 50b rises in synchronization with each other. Then, when the upper edge 60a of the door glass 60 comes into contact with the upper sash 23, the rise of the door glass 60 is stopped. Also in this case, when the torque of the motor 45 increases and the current supplied to the motor 45 exceeds a predetermined value, the current is cut off and the rotation of the drive pulley 44 is stopped.
[0029]
In carrying out the present invention, the lower end surface of the door glass may be brought into direct contact with the stopper rubber. Further, it goes without saying that each element constituting the present invention such as a frame member, a glass elevating body, and a rope body constituting the door glass elevating device, as well as a pulley shaft and a stopper rubber, can be appropriately modified and implemented.
[0030]
【The invention's effect】
According to the door glass lifting apparatus described in claim 1, when the glass lifting body is lowered to the bottom dead center by the cable body wound around the pulley, the glass lifting body is stopped by the stopper rubber. Since this stopper rubber is attached to the pulley shaft, the transmission path of the force for receiving the glass lifting body is short, the movement of the glass lifting body can be stopped efficiently, and the possibility of deformation and breakage is suppressed. . Since the stopper rubber is attached using the pulley shaft, there is no need to separately provide a member for supporting the stopper rubber and a position for providing the stopper rubber, which can contribute to simplification of the configuration.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a part of a pulley unit and a glass lifting body according to an embodiment of the present invention.
FIG. 2 is a front view of the pulley unit shown in FIG.
FIG. 3 is a front view of a state where a glass elevating body abuts against a stopper rubber of the pulley unit shown in FIG.
4 is a side view of a vehicle door having the pulley unit shown in FIG. 1. FIG.
5 is an enlarged side view showing a part of the vehicle door shown in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Door 21, 22 ... Sash 30 ... Door glass raising / lowering device 36, 37 ... Frame member 40, 41, 42, 43, 44 ... Pulley 50 ... Strip body 60 ... Door glass 61 ... Carrier plate 62 ... Glass raising / lowering body 80 , 81 ... Pulley unit 82 ... Pulley shaft 84 ... Stopper rubber

Claims (1)

A glass lifting body that moves up and down along the sash provided before and after the door;
A rope body connected to the glass lifting body and routed between a plurality of pulleys provided on a frame member of the door to drive the glass lifting body;
A pulley shaft that rotatably supports the pulley;
A stopper rubber attached to the pulley shaft and a lower end surface of the glass lifting body abuts when the glass lifting body is lowered to a predetermined position;
The door glass raising / lowering apparatus characterized by comprising.

Images