JP2745854B2 - Opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device for opening and closing an opening and closing member by a repulsive force of a damper stay, and more particularly to an opening and closing member for a back door of an automobile.

[0002]

2. Description of the Related Art The applicant of the present invention opens a back door of an automobile by a repulsive force of a damper stay, and winds a wire having one end fixed to the back door with a motor to open the back door. "Automobile door opening and closing device" that closes the door (Japanese Utility Model Application No. 1-116039)
Has filed. Hereinafter, this configuration will be described with reference to the drawings. FIG. 11 is a schematic diagram of the vehicle door opening and closing device.

[0003] A known damper stay 40 has a structure in which a fluid such as a high-pressure gas is sealed in a cylindrical cylinder 41, and a rod 44 which can protrude from one end of the cylinder 41 to the outside. A connected piston (not shown) is slidably fitted. A seal (not shown) is provided at one end of the cylinder 41 so that fluid does not leak outside from between the rod 44. Terminal 42 of cylinder 41 of this damper stay 40
Is attached to the back door 43 and the terminal 4 of the rod 44
5 is rotatably attached to the body 46. This damper stay 40 always opens the back door 43,
That is, the back door 43 is urged in a direction for supporting the back door 43 as shown by a two-dot chain line in the drawing. The wire 47 is fixed to the back door 43 with its one end 48 shifted from the end 42 of the cylinder 41, and the pulley 4 is moved along the damper stay 40.
9, the pulley 49 changes the direction and is connected to the rotating shaft of the motor 50. The rotation axis of the pulley 49 is fixed to the body 46. The wire 47 passes through the inside of the cylindrical guide 51 at a portion along the cylinder 41, further passes through the inside of the cover 52 of the damper stay 40, and passes through the guide 57 between the pulley 49 and the motor 50.

The closed back door 43 has a door lock mechanism 5 that locks an end 53 of the back door 43.
4 is unlocked by the actuator 55 and the wire 47 wound by the motor 50 is loosened, so that the wire 4 is released by the biasing force stored in the damper stay 40. In the process of opening the back door 43, the piston 44 slides in the cylinder 41 by the action of gas pressure or the like, so that the rod 44 protrudes from the inside of the cylinder 41. The damper stay 40 rotates upward. In order to close the back door 43 in the open state, the wire 47 is wound by the driving force of the motor 50 against the urging force of the damper stay 40. When the back door 43 is closed, the door is closed. The lock mechanism 54 is connected to the actuator 5
5 and the motor 50 is stopped. In this closing process, the wire 47 whose one end 48 is fixed to the body 46 is pulled through the pulley 49, so that the damper stay 40 rotates downward around the end 45 of the rod 44, and the rod 44 Cylinder 41
It is pushed inside. The control of the motor 50 and the actuator 55 is performed by the control device 56.

[0005]

As described above, in the above-described automatic door opening / closing apparatus, the wire 47 having one end fixed to the back door 43 is wound up, so that the rod 44 is passed through the back door 43. Is pushed into the cylinder 41, so that the sliding direction of the piston connected to the rod 44 in the cylinder 41 and the direction of the load applied from the back door 43 deviate from each other. For this reason, a load in the bending direction is applied to the damper stay 40, and the smoothness of sliding of the piston with respect to the cylinder 41 is impaired, and the sealing performance of the seal portion sealing one end of the cylinder 41 and the rod 44 is reduced. There was a risk of being damaged.

Therefore, the first invention is to apply a load to the damper stay in accordance with the sliding direction of the piston with respect to the cylinder to close the opening / closing body, so that the load is applied in the bending direction of the damper stay when the opening / closing body is closed. And make the piston slide smoothly against the cylinder,
It is an object to improve the reliability of a seal portion of a cylinder. Another object of the present invention is to improve the reliability of the seal portion of the cylinder by increasing the strength of the damper stay against the bending load so that the piston slides smoothly with respect to the cylinder.

[0007]

To achieve the above object, an opening / closing body opening / closing device according to a first aspect of the present invention is connected to a main body having an opening and an opening / closing body capable of opening and closing the opening. Urged by the pressure of the fluid sealed in the cylinder to slidably fit the piston
A damper stay for urging the opening / closing body to be always opened from the main body; and a wire and a wire winding means for operating the opening / closing body to close, and by controlling a winding amount of the wire. In the opening / closing body opening / closing device for opening and closing the opening / closing body, the wire is inserted through the center of the axis of the damper stay.

To achieve the above object, an opening / closing body opening / closing device according to a second aspect of the present invention is connected to a body provided with an opening and an opening / closing body capable of opening and closing the opening, and is slidably fitted in a cylinder. A damper stay that urges the combined piston by the pressure of the fluid sealed in the cylinder to urge the opening / closing body to be always opened from the main body; and a wire that operates to close the opening / closing body. An opening and closing body opening / closing device for opening and closing the opening and closing body by controlling a winding amount of the wire, wherein the opening and closing body has a cylindrical shape or a rod shape concentric with the axis of the damper stay, and includes a cylinder or a piston. And a guide slidable with respect to the other.

[0009]

According to the first aspect of the present invention, in the process of opening the opening / closing body, when the piston slides in the cylinder due to the pressure of the fluid, the wire is drawn into the damper stay. Conversely, in the closing process of the opening / closing body, the wire is wound by the winding means, so that the piston slides in the cylinder against the pressure of the fluid to close the opening / closing body. At this time, since the wire is wound while applying a load in the direction corresponding to the sliding direction of the piston to the damper stay, no load is applied to the bending direction of the damper stay.

According to the second aspect of the invention, the guide slides on the damper stay during the opening and closing of the opening and closing body. At this time, the load in the bending direction applied to the damper stay is borne by the sliding portion between the guide and the damper stay, so that the strength of the damper stay against the bending load is increased.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment including the first invention and the second invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the damper stay, and FIG. 2 is an enlarged view of a portion A in FIG. The cylinder 7 has a cylindrical shape and is filled with a fluid such as a high-pressure gas 24. A piston ring 9 is provided inside the cylinder 7.
The piston 10 in which is fitted is slidably fitted. The piston 10 has a hollow screw 21 and a nut 2
0, a washer 8 is sandwiched between the rod 2 and the piston 10, and a washer 11 is sandwiched between the piston 10 and the nut 20. Since the piston 10 is urged by the pressure of the high-pressure gas 24, the rod 2 is urged to protrude from one end of the cylinder 7 to the outside. Seal portions 3, 4, 5, and 6 are provided between the cylinder 7 and the rod 2 to prevent the high-pressure gas 24 from leaking outside. A spring 13 is provided at the other end of the cylinder 7 to reduce the impact when the rod 2 is pushed into the cylinder 7.
An adapter 22 is provided between the cylinder 3 and the cylinder 7.

The wire 18 is inserted into the damper stay 1 from the center of the cross section of the other end of the cylinder 7, and the innermost part 1 of the hollow part 26 provided at the center of the cross section of the piston 10 and the rod 2.
6 fixed. Here, it is necessary to seal so that the high-pressure gas 24 sealed in the cylinder 7 does not leak. For this reason, the wire 18 is connected to the cylindrical wire guide 1.
7, and is inserted into the damper stay. The inside of the wire guide 17 communicates with the atmosphere, and the outside is slidable with the seal portion 19 provided in the hollow portion 26. Specifically, the wire guide 17 is fixed to the inside of the other end of the cylinder 7 in a state sealed by a seal portion 23, is fitted into the hollow portion 26 with a margin, and a seal portion 19 is provided between the wire guide 17 and the hollow portion 26. Sealed. Therefore,
From the inside of the wire guide 17, the sealing portion 19 of the hollow portion 26
Is the air space, and the wire 18 exists only in the air space.

The damper stay 1 described above is connected to a vehicle body (main body) 30 and a back door (opening / closing body) 31 as shown in FIG. As shown in FIG. 4, the wire 18 having one end fixed to the rod 2 is connected to the lower back 3 along the roof side inner 32, the tower 33, and the floor 34.
5, where it is connected to a drive mechanism 36 which is a wire winding means. As shown in FIG. 5, the driving mechanism 36 includes a gear group 38 combined with a motor 37. As shown in FIG. 6, the drive gear 39, which is the final deceleration output of the gear group 38, meshes with a portion 40 of the wire 18, which is a geared cable, and extends from the damper stays 1, 1 provided on the left and right sides of the vehicle body 30. The incoming wires 18, 18 can be wound simultaneously.

When the motor 37 is rotated so as to extend the wire 18 while decelerating the urging force of the damper stay 1, the rod 2 is projected from the cylinder 7 and the back door 31 is opened. Conversely, when the motor 37 is rotated to pull the wire 18 against the urging force of the damper stay 1, the rod 2 is pushed into the cylinder 7 and closes the back door 31. The control of the motor 37 is performed by a control device (not shown). In the closing process of the back door 31, the direction in which the wire 18 is pulled in by the drive mechanism 36 matches the direction in which the rod 2 of the damper stay 1 is pushed into the cylinder 7, so that no load is applied to the damper stay 1 in the bending direction. , Rod 2 for cylinder 7
Can be pushed smoothly, and the cylinder 7
It is possible to eliminate the possibility that the sealing properties of the seal portions 3, 4, 5, and 6 between the rod and the rod 2 are impaired, and to improve the reliability of the sealing properties 3, 4, 5, and 6.

When the rod 2 is pushed into the cylinder 7 and projected, the hollow portion 26 is formed outside the wire guide 17.
By sliding the sealing portion 19 fixed to the inner wall of the damper stay 1, it is possible to prevent the leakage of the high-pressure gas 24 due to the insertion of the wire 18 into the damper stay 1. Further, since the rod 2 is supported on the cylinder 7 via the wire guide 17 and the strength of the damper stay 1 against bending load is increased, a load in the bending direction is applied to the damper stay 1 in the process of opening and closing the opening / closing body. Also, the rod 2 can be smoothly projected and pushed into the cylinder 7 and the load in the bending direction applied to the seal portions 3, 4, 5, and 6 between the cylinder 7 and the rod 2 can be reduced. Eliminating the possibility that the sealing performance of the cylinder 7 and the rod 2 is impaired,
The reliability of 5 and 6 can be improved. Further, since the wire 18 is always present in the air space, the wire 18 does not come into contact with the fluid 24 in the cylinder 7, so that the fluid 24 does not leak when the wire 18 is assembled. Further, since the wire 18 passes through the inside of the damper stay 1, the wire 18 does not become entangled, and the appearance can be improved.

Next, another embodiment according to the present invention will be described. As a second embodiment, a case where the seal portion around the guide is provided at two places will be described with reference to FIG. FIG. 7 is a schematic diagram corresponding to FIG. Rod 102
To the spring 113 side from the piston 110
2 and the seal portion 119
And a seal portion (FIG. 1)
Only 106 corresponding to the seal portion 6 shown in FIG. By providing another seal portion 120 on the side of ()), the rod 102 can be smoothly projected and pushed into the cylinder 107, and the load on the seal portion 106 in the bending direction can be reduced. Further, the sealing property between the cavity 126 and the wire guide 117 can be improved.

Referring to FIG. 8, a third embodiment in which a guide is a rod and extends in a direction opposite to a piston rod will be described. FIG. 8 is a schematic diagram corresponding to FIG. One end of the rod-shaped guide 217 is fixed to the piston 210. The guide 217 is slidable with the end of the cylinder 207 via the seal 223. The wire 218 is fixed to the other end of the guide 217.

As a fourth embodiment, a cylinder provided with a guide will be described with reference to FIG. FIG. 9 is a schematic diagram corresponding to FIG. One end of a cylindrical guide 317 is fixed to the outer periphery of the cylinder 307, and the other end is slidable with respect to the rod 302 via a seal portion 303. A wire (not shown) is connected to a back door (not shown) and a vehicle body (not shown) along the outer shape of the damper stay 301.

Referring to FIG. 10, a fifth embodiment in which a guide is a rod and extends in the same direction as a piston rod will be described. FIG. 10 is a schematic diagram corresponding to FIG. A rod-shaped guide 417 fixed to the end of the cylinder 407 is fitted with a gap into a hollow portion 426 provided in the piston 410 and the rod 402. The guide 417 is provided in a sealing portion 419 provided in the hollow portion 426.
Through the piston 410. A wire (not shown) is connected to the damper stay 40.
1 is connected to a back door (not shown) and a vehicle body (not shown) along the outer shape of the vehicle. Although the present invention has been described with reference to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments can be considered within the scope of the present invention.

[0020]

According to the first aspect of the present invention, the load in the bending direction of the damper stay applied by winding the wire in the closing process of the opening / closing body can be eliminated.
The piston can be smoothly slid with respect to the cylinder, and the reliability of the seal portion of the cylinder can be improved. Further, since the wire is inserted through the inside of the damper stay, the wire does not get entangled and the appearance can be improved. According to the second aspect, by increasing the strength of the damper stay against the bending load, the piston can be smoothly slid with respect to the cylinder, and the reliability of the seal portion of the cylinder can be improved.

[Brief description of the drawings]

FIGS. 1 to 6 show an opening / closing body opening / closing device according to a first embodiment of the present invention.

FIG. 1 is a longitudinal sectional view of a damper stay constituting an opening / closing body opening / closing device.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a perspective view of a back door of an automobile to which an opening / closing body opening / closing device is attached.

FIG. 4 is a perspective view of a rear portion of the automobile to which the opening / closing body opening / closing device is attached.

FIG. 5 is a perspective view of a drive mechanism constituting the opening / closing body opening / closing device.

FIG. 6 is a perspective view showing a main part of a drive mechanism constituting the opening / closing body opening / closing device. 7 to 10 show another embodiment included in the present invention.

FIG. 7 is a schematic view of a second embodiment corresponding to FIG. 2;

FIG. 8 is a schematic diagram of a third embodiment corresponding to FIG.

FIG. 9 is a schematic view of a fourth embodiment corresponding to FIG.

FIG. 10 is a schematic diagram of a fifth embodiment corresponding to FIG. 2; FIG.
Reference numeral 1 denotes a conventional automobile door opening / closing device.

FIG. 11 is a schematic view of a conventional vehicle door opening and closing device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 damper stay 2 rod 7 cylinder 10 piston 17 wire guide (guide) 18 wire 24 high-pressure gas (fluid) 30 vehicle body (main body) 31 back door (opening / closing body) 36 drive mechanism (wire winding means)

Continuation of the front page (56) References JP-A-58-218571 (JP, A) JP-A-56-125578 (JP, A)

Claims (2)

(57) [Claims] A piston, which is connected to a main body having an opening and an opening / closing body for opening and closing the opening and slidably fitted in the cylinder, is urged by the pressure of a fluid sealed in the cylinder. A damper stay for urging the opening / closing body to be always open from the main body; and a wire and a wire winding means for operating the opening / closing body to close, and controlling a winding amount of the wire. An opening / closing body opening / closing device for opening / closing the opening / closing body, wherein the wire is inserted through a center of an axis of the damper stay. 2. A piston, which is connected to a main body having an opening and an opening / closing body for opening and closing the opening and slidably fitted in the cylinder, is urged by the pressure of a fluid sealed in the cylinder. A damper stay for urging the opening / closing body to be always open from the main body; and a wire and a wire winding means for operating the opening / closing body to close, and controlling a winding amount of the wire. In the opening / closing body opening / closing device for opening and closing the opening / closing body, a guide concentric with the axis of the damper stay is fixed to one of the cylinder and the piston and slidable with respect to the other. An opening / closing body opening / closing device comprising: