JP2002194946A - Automatic opening/closing device of opening/closing body for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic opening/closing device of an opening/closing body for a vehicle which prevents the increase of the size of an opening part by enlarging a crossing angle between an connecting link and the opening part so as to reduce a projection area, of which the appearance is improved, and at the same time, which can be conveniently used by preventing it from being drawn in to the opening part and an object from being caught. SOLUTION: A connecting part of one end 12a of the connecting link 12 and the connecting part of the other end 12b are arranged opposite to each other by constantly making a line formed by connecting a pivot shaft 6a and an output shaft 13 as a border during operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle for automatically opening / closing an opening / closing body such as a back door provided at a rear end face of a one-box type automobile by a driving force of a driving device such as a driving motor. The present invention relates to an automatic opening / closing device for an opening / closing body.

[0002]

2. Description of the Related Art Such an automatic opening / closing device for a vehicle opening / closing body is disclosed, for example, in Japanese Utility Model Laid-Open No. 2-1386, in which a back door pivotally supported by an upper edge of a vehicle rear end opening is automatically mounted. A device for opening and closing, wherein a drive motor for rotationally driving an output shaft is fixed near a pivot portion of a back door.
The base end of the swing arm is fixed to the output shaft, one end of a connection link is connected to the tip of the swing arm to form a V-shape, and the other end of the connection link is connected to the vehicle body. An opening / closing drive unit; and a drive control unit for controlling a rotation direction of the drive motor. A four-joint link is formed by the swing arm and the connection link, the vehicle body, and the back door.

[0003] The connecting portion of the connecting link on the back door side swings as the back door swings. Since the back door which hangs in the fully closed state swings about 90 degrees between the fully opened state and the substantially horizontal state, the connecting portion on the other end side of the connecting link swings according to the path of this swing. Then, the swing arm, which is one end of the connecting link, must inevitably move along the swing locus of the back door, so select the range in which the tip of the swing arm moves horizontally from below to the rear. In the prior art, this range is defined as an operating range.

When the opening / closing drive means of such an automatic opening / closing device for a vehicle opening / closing body is disposed in a pillar on the vehicle body side, when the swing arm is rotated from below the vehicle to the rear of the vehicle to move the connecting link. Since the connecting link is connected to the tip of the swing arm near the back door surface and to the back door, the connecting link is disposed substantially parallel to the back door surface.

[0005]

However, in such an arrangement, the movement of the connecting link becomes a movement close to the vertical movement with the swing of the swing arm. For this reason, the opening formed for inserting the connecting link formed in the pillar must be formed with a size larger than the working range of the connecting link arranged in a state close to the pillar surface in a state parallel to the pillar. Disappears. That is, the projection area of the opening becomes extremely large. If the projection area of the opening is large, not only the appearance is poor, but also the objects loaded in the opening may be drawn in, which is inconvenient.

Further, as the angle between the swing arm and the connecting link and the connecting link and the back door, and the connecting link and the pillar, which are formed in a V-shape, become smaller as the vehicle approaches the fully closed state, it is loaded between them. An object may be pinched, which is inconvenient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and prevents the enlargement of the projection area of the opening by increasing the angle at which the connecting link intersects with the opening to reduce the projection area. It is another object of the present invention to provide an automatic opening / closing device for a vehicle opening / closing body which improves the appearance, prevents the object from being pulled into the opening, and prevents the object from being caught.

[0008]

According to the first aspect of the present invention,
A device for automatically opening and closing an opening / closing body pivotally supported by a pivot shaft at an opening edge of a vehicle, wherein an output shaft disposed in the vicinity of the pivot shaft is rotationally driven in forward and reverse directions inside the vehicle body. And a swing arm and a connection link are arranged between the output shaft and the opening / closing body, and one end of the swing arm is fixed to the output shaft, The other end of the arm is swingably connected to one end of the connection link, and the other end of the connection link is swingably connected to the opening and closing body through an insertion opening formed in the vehicle body. In the automatic opening and closing device for a vehicle opening and closing body, the connecting portion at one end of the connecting link and the connecting portion at the other end are always located on opposite sides of a line connecting the pivot shaft and the output shaft during operation. It is characterized by being arranged to be.

According to the first aspect of the present invention, the connecting portion at one end of the connecting link and the connecting portion at the other end are always located on opposite sides of the line connecting the pivot shaft and the output shaft during operation. The projection area can be reduced by increasing the angle at which the connecting link intersects with the opening. Accordingly, the opening formed for inserting the connecting link can be small. As described above, the appearance can be improved and the usability can be improved by preventing the object from being pulled into the opening or being caught by the object.

According to a second aspect of the present invention, the swing range of the swing arm is a position where the swing arm is directed from the position substantially perpendicular to the opposing surface when the opening / closing body is closed to the pivot shaft. And

According to the second aspect of the present invention, the operation of the connecting link can be performed in the longitudinal direction, and the angle change during the movement can be reduced, so that the lower end position of the opening for inserting the connecting link can be further raised. And eventually the vertical dimension of the opening can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show an automatic opening / closing device for a vehicle opening / closing body according to an embodiment of the present invention. In this embodiment, an example in which the present invention is applied to a back door of a one-box type automobile will be described. In FIGS. 1 to 4, the left side of the drawing indicates the front of the vehicle, and the right side of the drawing indicates the rear of the vehicle.

In FIG. 1 and FIG. 2, an opening 3 for unloading cargo is formed in the rear end face of the body 2 of the one-box type automobile 1, and the opening 3 is an "opening / closing body". A back door 4 is provided. The upper edge 4a of the back door 4 is pivotally supported by a hinge 6 on the roof panel 5 at the upper edge of the opening 3. Connect the back door 4 to the hinge 6
The opening 3 is configured to be opened and closed by pivoting vertically about a hinge pin 6a, which is a “pivot shaft”. A gas stay 7 is attached between the vehicle body 2 and the back door 4.
Are connected to the vehicle body 2 and the back door 4 at both ends. The gas stay 7 has a compressed gas sealed therein and is urged in the extension direction to generate an auxiliary urging force for opening and closing the back door 4.

The back door 4 of the present embodiment has
An automatic opening and closing device 10 is provided. The automatic opening and closing device 10 is provided in a pillar 2a at the rear end of the vehicle body 2 and is capable of rotating forward and reverse (not shown), and a reduction mechanism (not shown) for reducing the output of the drive motor and transmitting the output to the output shaft 13. , A connection link 12 connecting the drive unit 11 and the back door 4, an opening / closing control device not shown for controlling the rotation direction of the drive motor, and an opening / closing control not shown. And an open / close operation switch for inputting an open / close operation signal to the device. The drive motor drives the back door 4 to open from the fully closed state to the fully opened state by the forward rotation through the automatic opening and closing device 10, and from the fully opened state to the fully closed state by the reverse rotation through the automatic opening and closing device 10. 4 is driven to close the door.

The output shaft 13 protrudes from the side surface of the drive unit 11. The output shaft 13 has a swing arm 1
4 has one end 14a fixed thereto. The swing arm 14 is
With the forward and reverse rotation of the output shaft 13, the output shaft 13 swings around one end 14a.

On the other end 14b side of the swing arm 14, one end 12a of the connecting link 12 is swingably connected to the first connecting pin 12
They are connected by c. The other end 12b of the connection link 12
It is swingably connected to a bracket 15 attached near the hinge 6 of the back door 4 by a second connection pin 12d. An opening 2b through which the connecting link 12 is inserted is formed in the rear end surface 2aa of the pillar 2a which is the "opposing surface" when the back door 4 is closed. The opening 2b is
The connecting link 12 is formed to have a size D large enough to operate.

Here, the center of the output shaft 13 and the hinge pin 6a
Between the center of the vehicle body side link 16, the swing arm 14, the connecting link 12, and the hinge pin 6 a of the back door 4 and the second connecting pin 12 d of the bracket 15. The back door-side link 17 integrally present in the back door 4 constitutes a four-bar link.

The hinge pin 6a, the output shaft 13, the first connecting pin 12c, and the second connecting pin 12d, which are connecting portions,
Each of them forms a four-link link.

Therefore, when the output shaft 13, which is one of the four-links, is swung, the swing arm 14 having one end 14a fixed to the output shaft 13 swings, and the other end 14b of the swing arm 14 is swung. Is connected to the bracket 15 of the back door 4 to transmit a driving force to swing the back door 4 in the opening and closing direction about the hinge pin 6a.

The first connecting pin 12c, which is the connecting portion of the one end 12a of the connecting link 12, is always in contact with the second connecting pin 12d, which is the connecting portion of the other end 12b, during operation.
6 are disposed on opposite sides of each other. That is, the vehicle body side link 16 and the connection link 12 are disposed so as to always intersect during operation.

The swing range of the swing arm 14 is substantially perpendicular to the rear end surface 2aa of the pillar 2a, which is the "opposing surface" when the back door 4 is closed, ie, the pillar 2a Swings from the substantially horizontal position to the position facing the hinge pin 6a on the inner side of the
The angle is set in a range of about 90 degrees from a horizontal direction facing the front of the vehicle body 2 to an upper direction.

Next, the operation of the automatic opening and closing device 10 will be described with reference to FIGS.

3A and 3B are explanatory views showing the open / closed state of the back door 4. FIG. 3A shows a fully closed state A, FIG. 3B shows an intermediate state B, and FIG. 3C shows a fully open state C. Show. FIG. 4 is an explanatory diagram showing a fully closed state A of the series of operations by a solid line, and an intermediate state B and a fully open state C by an imaginary line.

Next, the process of opening the open / close operation switch to operate the automatic open / close device 10 under the control of the open / close control device and bringing the back door 4 in the fully closed state A to the fully open state C will be described.

First, in the fully closed state A, FIG.
As shown by a solid line in FIG. 4, the swing arm 14 is stopped in a substantially horizontal state facing the front of the vehicle body 2. At this time, the connection link 12 extends obliquely upward rearward from the other end 14 b of the swing arm 14 and is connected to the bracket 15 of the back door 4. At this time, the back door 4 is still in the fully closed state A, and is in a substantially suspended state pivotally supported by the hinge pin 6a.

When the open / close operation switch is opened from the fully closed state A of the back door 4 and the drive motor rotates forward under the control of the open / close control device, the swing arm 14 starts swinging clockwise. Accordingly, the connecting link 12 moves, and the back door 4 connected to the connecting link 12 is moved.
Also starts to open the door.

In the intermediate state B, as shown by imaginary lines in FIG. 3B and FIG.
Swings to a state in which it faces almost obliquely upward in front of. At this time, the connecting link 12 is connected to the other end 14 of the swing arm 14.
b, extends obliquely upward rearward and is connected to the bracket 15 of the back door 4. Link 12
Moves in the longitudinal direction of the connecting link 12 and does not swing much in the width direction thereof. At this time, the back door 4 is in a half-open state, is pivotally supported by the hinge pin 6a, is inclined downward and rearward, and is inclined.

In the fully opened state C, as shown by the imaginary lines in FIG. 3C and FIG. 4, the swing arm 14 is facing upward and stopped in a substantially upright state. At this time, the connection link 12 extends obliquely upward rearward from the other end 14 b of the swing arm 14 and is connected to the bracket 15 of the back door 4. At this time, the back door 4 is in the fully opened state C, is pivotally supported by the hinge pin 6a, faces rearward, and is in a substantially horizontal state.

When the opening / closing operation switch is closed from the fully opened state C of the back door 4 and the drive motor rotates reversely under the control of the opening / closing control device, the swing arm 14 starts swinging counterclockwise. Along with that, link 1
2 moves, and the back door 4 at the fully open position C connected to the connection link 12 also starts closing. Since the movement of each link and the like is only reverse to the case of the door opening operation, detailed description is omitted.

As described above, the first connecting pin 12c, which is the connecting part of the one end 12a of the connecting link 12, is always connected to the hinge pin 6a during the operation with respect to the second connecting pin 12d, which is the connecting part of the other end 12b. Body side link 16 connecting shaft 13
Are arranged opposite to each other with respect to, and the intersection angle between the connecting link 12 and the opening 2b can be increased to reduce the projected area. Therefore, the opening 2b formed for inserting the connecting link 12 can be small. Therefore, the appearance can be improved, and the usability can be improved by preventing the object from being pulled into the opening 2b or being caught by an object.

The swing of the other end 14b of the swing arm 14 is set so as to be substantially along the longitudinal direction of the connecting link 12. On the other hand, the swing of the second connection pin 12 d, which is a connection portion between the other end 12 b of the connection link 12 and the back door 4, is also set to substantially follow the longitudinal direction of the connection link 12. With this setting, the connecting link 12 does not largely move in the width direction during the movement, and the angle change during the movement is reduced. As a result, the opening 2b through which the connecting link 12 is inserted can be reduced.

In this embodiment, an example is shown in which the automatic opening and closing device of the present invention is applied to the back door of a one-box type automobile. However, the present invention is not limited to this, and the present invention is not limited to this. Needless to say, it may be applied to a door.

[0033]

According to the first aspect of the present invention, the connecting portion at one end of the connecting link and the connecting portion at the other end are always located on opposite sides of the line connecting the pivot shaft and the output shaft during operation. Since the angle of intersection between the connecting link and the opening can be increased and the projected area can be reduced, the opening formed for inserting the connecting link can be small.
Therefore, the appearance can be improved, and the usability can be improved by preventing the object from being pulled into the opening or being caught by the object.

According to the second aspect of the present invention, since the operation of the connecting link can be performed along the longitudinal direction and the angle change during movement can be reduced, the opening for inserting the connecting link can be further reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle equipped with an automatic opening / closing device according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of FIG.

3A and 3B are explanatory views showing the open / closed state of the back door of FIGS. 1 and 2, wherein FIG. 3A is a fully closed state A, FIG. 3B is an intermediate state B, and FIG. C is shown.

FIG. 4 is an explanatory diagram showing a fully closed state A by a solid line and a halfway state B and a fully open state C by an imaginary line in a series of operations of the back door of FIGS. 1 and 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Body 2b Opening 3 Opening 4 Back door (opening / closing body) 6a Hinge pin (pivot shaft) 10 Automatic opening / closing device 11 Drive unit 12 Connection link (opening / closing drive means) 12a One end 12b Other end 12c First connection pin (Connecting part) 12d Second connecting pin (connecting part) 13 Output shaft 14 Swing arm 14a One end 14b Other end

Claims (2)

[Claims] 1. A device for automatically opening and closing an opening / closing body pivotally supported by a pivot shaft at an opening edge of a vehicle, wherein an output shaft disposed in the vicinity of the pivot shaft is rotated forward and backward inside a vehicle body. A drive unit that can be driven to rotate in the reverse rotation direction is fixed, and a swing arm and a connecting link are disposed between the output shaft and the opening / closing body, and one end of the swing arm is fixed to the output shaft. The other end of the swing arm is swingably connected to one end of the connection link, and the other end of the connection link swings to the opening / closing body through an insertion opening formed in the vehicle body. In the automatic opening / closing device for a vehicle opening / closing body that is connected as possible, the connecting portion at one end of the connecting link and the connecting portion at the other end are always bounded by a line connecting the pivot shaft and the output shaft during operation. Vehicle opening and closing characterized by being arranged on opposite sides of each other Automatic body opening and closing device. 2. The automatic opening / closing device for a vehicle opening / closing body according to claim 1, wherein a swing range of the swing arm is substantially perpendicular to an opposing surface when the swing arm is closed. An automatic opening / closing device for an opening / closing body for a vehicle, wherein the automatic opening / closing body is located at a position facing a pivot shaft.