JP2004284401A - Opening and closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an opening and closing device applicable to a door on which the weight of a baggage acts and using a small-sized driving device. <P>SOLUTION: The driving device 20 is provided with a driving arm 22 slidably engaged with a second link 52 and rotated by the driving device 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an opening and closing device for opening and closing a rear door and the like that is swingably mounted on a vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a device for opening and closing a rear door for a vehicle, a device that operates to lift and open a lower end of a door rotatably attached to a vehicle at an upper end portion is used. Such an opening / closing device includes a drive motor attached to one of the vehicle side and the door side, and an arm that swings by operation of the drive motor. A link pivotally connected to the arm is connected to the other of the vehicle side and the door side to open and close the rear door. (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 2-1386 [0004]
[Problems to be solved by the invention]
For example, as shown in FIG. 1, a rear door rotatably attached to a vehicle at a lower end portion and operated to open with the upper end lowered, when loading and unloading luggage in a flat state when the rear door is opened. This is done with luggage on top. For this reason, when the above-described conventional opening and closing device is applied to such a rear door, the weight of the door and the load acts on the driving device via the link and the arm. For this reason, since the strength of the driving device needs to be extremely increased, the weight and the manufacturing cost increase, which is a problem.
[0005]
An object of the present invention is to realize an opening / closing device which can be applied to a door on which the weight of luggage or the like acts by using a small driving device.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, a first technical means adopted in the present invention includes a first link rotatably supported by an opening / closing body rotatably mounted on a vehicle body, and a first link rotatably mounted on the vehicle body. A second link attached to and rotatably coupled to the first link; and an opening / closing device including a driving device for driving the second link to rotate with respect to the vehicle body, wherein the driving device is configured to be connected to the second link. A drive arm slidably engaged and rotated by the drive device.
[0007]
By this means, a configuration is possible in which the load is supported by the first link and the second link, and the load acting on the drive arm can be reduced.
[0008]
Further, a second technical means is that, in addition to the first means, the first link and the second link are arranged on a substantially straight line when the opening / closing body is open.
[0009]
By this means, the load of the opening / closing body acts so as to be transmitted to the vehicle body by the first link and the second link, and does not act on the drive arm.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the switching device 30 according to the present invention will be described with reference to FIGS.
[0011]
FIG. 1 shows an embodiment in which the opening / closing device 30 is applied to a device for opening / closing a rear door 12 to which a rear portion of a vehicle is attached. The rear door 12 is attached to the vehicle body 10 at its lower end by a hinge 14, rotates around the hinge 14, and opens and closes by raising and lowering the upper end. The opening / closing device 30 includes a driving device 20 and a link mechanism 50 for opening and closing the rear door 12 by the driving device 20. The link mechanisms 50 are usually mounted on both sides in the width direction of the vehicle, and the driving device 20 drives the link mechanism 50 on one side. Here, only the drive device 20 side will be described. The link mechanism 50 may be configured only on one side of the rear door 12 as necessary, and the other side may be configured by a wire or a chain.
[0012]
As shown in FIG. 1, the rear door 12 is placed on the opened rear door 12 when loading and unloading the luggage 9 in the vehicle. And the weight of the load 9 acts. The link mechanism 50 is configured to support this load.
[0013]
FIG. 2 shows a state where the rear door 12 is closed. A first link 51 is rotatably attached to the rear door 12 at a substantially central portion in the vehicle vertical direction by a connecting pin 13. Further, the other end of the first link 51 is rotatably connected to the second link 52 by a connecting pin 53. The other end of the second link 52 is rotatably connected to the vehicle body 10 by a pin 15. The link mechanism 50 composed of the first link and the second link is configured such that each link rotates in the plane in the up-down direction and the front-back direction of the vehicle.
[0014]
The drive device 20 is attached to the vehicle body by fastening means (not shown) such as bolts. The drive device 20 includes a drive motor 26 serving as a drive source, and the drive motor 26 is configured to be able to rotate a drive shaft 24 via a speed reduction mechanism 23. The drive arm 22 is fixed to the drive shaft 24. With this configuration, the drive arm 22 swings within a predetermined angle range by rotation of the drive motor 26 in one direction or the other direction.
[0015]
A drive pin 25 is attached to the distal end of the drive arm 22, and fits into an elongated hole 54 formed along an axis connecting both ends of the second link 52, and is slidable. When the drive arm 22 swings, the second link 52 can be rotated around the pin 15 while the drive pin 25 moves in the elongated hole 54.
[0016]
Next, the operation of the opening and closing device 20 configured as described above will be described.
[0017]
From the state where the rear door 12 shown in FIG. 2 is closed, the drive arm 22 of the drive device 20 rotates counterclockwise, and rotates the second link 52 counterclockwise via the drive pin 25. As a result, the first link pushes the rear door 12 to rotate in the clockwise direction, and as shown in FIG. 3, the rear door 12 is moved to a position where one surface thereof is substantially horizontal upward. It rotates and becomes open. When the rear door 12 is in the opened state, the link mechanism 50 has the first link 51, the second link 52, and the connecting portions 15, 53, and 13 in a straight line. Therefore, the link mechanism 50 has sufficient strength to support the heavy load 9 even if the heavy load 9 is placed on the rear door 12.
[0018]
The weight of the load 9 and the rear door 12 supported by the link mechanism 50 is transmitted to the vehicle body 10 by the connecting pin 15. Therefore, no load acts on the drive pin 25. Therefore, since the load is not transmitted to the driving device 20, the driving device 20 can be made small.
[0019]
The operation of returning the rear door 12 from the opened state in FIG. 3 to the closed state in FIG. 2 again is performed by operating the driving device 20 in the opposite direction to the above. When the rear door 12 in FIG. 2 is closed, a method of holding the rear door 12 using a lock device (not shown) is used. The opening / closing device 30 of the present invention operates together with the lock device in accordance with a command from a control device (not shown) including an operation switch.
[0020]
【The invention's effect】
As described above, according to the configuration of the present invention, a large load acts on the link mechanism 50 when the rear door 12 is open, but no load acts on the drive device 20. Does not need to have high strength, can be made compact, and can be lightweight and reduce manufacturing costs.
[Brief description of the drawings]
FIG. 1 is a side view in which an opening / closing device according to the present invention is applied to a rear door of a vehicle.
FIG. 2 is a side view showing a state in which a rear door is closed by the opening / closing device according to the present invention.
FIG. 3 is a side view showing a state in which a rear door is opened by the opening / closing device according to the present invention.
[Explanation of symbols]
10 Body 12 Opening / closing body (rear door)
20 Drive 22 Drive Arm 51 First Link 52 Second Link

Claims (2)

A first link rotatably supported by an opening / closing body rotatably attached to the vehicle body;
A second link rotatably attached to the vehicle body and rotatably coupled to the first link;
An opening / closing device including a driving device that rotationally drives the second link with respect to the vehicle body;
The opening / closing device, wherein the driving device includes a driving arm slidably engaged with the second link and rotated by the driving device. The opening / closing device, wherein the first link and the second link are arranged on a substantially straight line when the opening / closing body is in an open state.

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