JPH0546429B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applicable to, for example, back doors, luggage doors,
The present invention relates to an opening/closing body support structure using a gas damper stay that is suitable for application to opening/closing bodies such as side doors and hoods.

[Conventional technology]

In an opening/closing body support structure using a gas damper stay applied to automobiles, the opening/closing body is pivotally supported by the vehicle body and can be opened and closed, and the opening/closing body is opened and closed by a gas damper stay provided between the vehicle body and the opening/closing body. The opening/closing operability is improved by biasing the opening in the opposite direction.

With this gas damper stay, if the gas pressure changes due to changes in the environmental temperature, the stay reaction force will change and the desired opening/closing operability will not be achieved. Various types of compensation have been proposed.

For example, in Utility Model Application Publication No. 52-20616, one end is supported by the opening/closing body, and a crank-shaped support member is provided at the other end of the gas damper stay, and this support member can be fixed at multiple predetermined rotation angles. A configuration in which it is supported on the vehicle body has been proposed. With this configuration, the rotation angle of the support member is changed in response to changes in the environmental temperature, and the support position of the gas damper stay on the vehicle body side is changed to offset changes in the stay reaction force with changes in the moment arm. I'm starting to do that.

However, the above configuration has the disadvantage that the rotation angle of the support member must be changed manually, which makes the operation cumbersome. Further, it is difficult to judge when to perform this operation, and when a large number of fixing positions of the support member are set, it is extremely difficult to judge which position should be fixed.

[Problem that the invention seeks to solve]

In view of the above, the present invention provides an opening/closing body using a gas damper stay that can temperature-compensate the gas damper stay by automatically changing the support position of the gas damper stay to an optimal position in response to changes in environmental temperature. The purpose is to provide a supporting structure.

[Means for solving problems]

The present invention provides an opening/closing body using a gas damper stay that supports an opening/closing body which is pivotably supported by a main body and can be opened/closed by a gas damper stay provided between the main body and the opening/closing body. In the support structure, the gas damper stay is supported by a rocking body pivotally supported by the main body or the opening/closing body, so that the axis of the gas damper stay can move toward and away from the pivot of the opening/closing body to the main body, This oscillator is connected to a temperature compensator that is activated by temperature changes to oscillate the oscillator.

[Effect]

In the present invention having the above configuration, when the environmental temperature changes, the temperature compensation device operates to swing the rocking body, change the support position of the gas damper stay on the main body side or the opening/closing body side, and thereby pivot the opening/closing body to the main body. Change the length of the surrounding moment arm. This results in
Changes in the stay reaction force of the gas damper stay are offset by changes in the moment arm length, so that a substantially constant moment always acts on the opening/closing body regardless of changes in the environmental temperature.

〔Example〕

FIGS. 1 to 5 show a first example of an opening/closing body support structure using a gas damper stay according to the present invention applied to a so-called gull wing type side door of an automobile.
An example is shown. In the figure, the arrow FR direction indicates the front of the vehicle, the arrow UP direction indicates the top of the vehicle,
The arrow IN direction indicates inward in the vehicle width direction.

As shown in FIG. 1, the side door 10, which is an opening and closing body, is pivotally supported by a roof portion 12 of a vehicle body, which is the main body, via a hinge 14, and can be opened and closed about an axis HCL. side door 10
A ring bracket 16 is attached to the ring bracket 16. As shown in FIGS. 2 and 3, the ring bracket 16 attaches to the side door 10 surrounded by a door outer panel 10A and a door inner panel 10B.
The hinge side reinforcement 10C is fixed to the door inner panel 10B in the inner space.
, the flange portion 16A is attached to the bolt 19 and nut 2.
It is attached via 1. The main body portion 16B of the link bracket 16 has a rectangular tube shape, and is inserted into a through hole bored in the door inner panel 10B and the hinge side reinforcement 10C. An intermediate portion of a link 20, which is a swinging body, is pivotally supported on the main body portion 16B of the link bracket 16 via a pin 18. As shown in FIGS. 3 and 4, a bushing 22 made of sintered metal is inserted between the main body portion 16B, the pin 18, and the link 20, and is fitted onto the pin 18.
This allows for smooth rocking.

One end of the link 20 comes out of the space inside the side door 10 and is connected to the upper end of the gas damper stay 26 via a ball joint 28. The gas damper stay 26 has a well-known configuration in which a piston disposed in a cylinder tube 29 is urged by the pressure of gas sealed in the cylinder tube 29, and a piston rod 30 fixed to the piston is extended from the cylinder tube 29. It's starting to come out. The tip of the piston rod 30, which is the lower end of the gas damper stay 26, is connected via a ball joint 32.
As shown in FIG. 3, it is attached to the front pillar outer 34A of the vehicle body. The front pillar outer 34A and the front pillar inner 34B constitute the front pillar 34. The gas damper stay 26 is housed in a space formed between the side door 10 and the front pillar 34 when the side door 10 is fully closed.

On the other hand, a temperature compensating stay 36 that is a temperature compensating device is arranged in a space inside the side door 10. As shown in FIG. 5B, a first piston 44 is fitted into the temperature compensation stay 36 so as to be slidable in the axial direction inside the cylinder tube 40. A first piston rod 46 and a second piston rod 48 are coupled to the first piston 44 coaxially with the first piston 44 and extend in opposite directions. The first piston rod 46 passes through a sealing member 50 fitted to the end of the cylinder tube 40 and comes out of the cylinder tube 40.

A partition member 5 is provided in the middle part of the cylinder tube 40.
2 is fitted, and this partition member 52 connects the first piston 44 and the end wall 54 of the cylinder tube 40.
The space between them is divided into two rooms, A room and B room. The second piston rod 48 is connected to the partition wall member 52.
A second piston 56 is formed at the tip of the piston 56 that extends from the A chamber to the B chamber.
The second piston 56 is slidably fitted inside an inner cylinder tube 58 that extends from the end wall 54 coaxially with the cylinder tube 40 .

The B chamber is separated into two chambers, a B1 chamber and a B2 chamber, by an inner cylinder tube 58 and a second piston 56. The B1 chamber communicates with the A chamber through a hollow portion 60 formed in the second piston rod 48.
High-pressure gas is sealed in chambers A and B1.
Chamber B2 is filled with oil that expands when the temperature rises. As a result, the first piston 44 and the second piston 56 are urged by gas pressure in the direction in which the first piston rod 46 extends from the cylinder tube 40, but since the second piston 56 compresses the oil, the first piston rod The amount of extension of 46 is limited. Since the volume of oil changes with changes in temperature, the amount of extension of the first piston rod 46 changes depending on the temperature.

The temperature compensation stay 36 is connected to the first piston rod 4
6 is connected to the other end of the link 20 via a ball joint 62, and the cylinder tube 40 is connected to the ball joint 64.
and the door inner panel 1 via the bracket 66.
It is attached to 0B.

The gas damper stay 26 acts to push the first piston rod 46 into the cylinder tube 40 via the link 20;
The gas sealed in the cylinder tube 40 is set at a pressure that prevents the first piston rod 46 from being pushed into the cylinder tube 40. The link 20 is positioned as shown in FIG. 5B when the ambient temperature is 20°C. When the temperature rises from this state, the oil in the temperature compensation stay 36 expands.
The first piston rod 46 is the cylinder tube 40
, and the link 20 is swung counterclockwise. When the environmental temperature is 70° C., the link 20 has moved to the position indicated by the center line LCL1.
Further, when the environmental temperature decreases, the oil in the temperature compensation stay 36 contracts, and the first piston rod 46 is extended from the cylinder tube 40.
The link 20 is swung clockwise. When the environmental temperature is -30℃, the link 20 is at the center line.
It has moved to the position indicated by LCL2.

The direction of movement of the link 20 due to the swinging as seen from the front side of the vehicle is such that the axis GCL of the gas damper stay 26 approaches and separates from the axis HCL of the hinge 14, as shown by arrow C in FIG. 5A. There is.
Therefore, the moment arm of the moment M that rotates the side door 10 when the environmental temperature is 20°C, 70°C, and -30°C is L0, L1, and L2, respectively, when the side door 10 is fully closed. . The moment arms L0, L1, and L2 have an environmental temperature of 20℃, 70℃,
It is set based on the relationship with F0, F1, and F2, which are the biasing forces of the gas damper stay 26 at -30℃,
As shown in equation (1) below, the moment M is made to be approximately the same at each temperature. With this setting, the moment M is approximately the same regardless of the environmental temperature between 70°C and -30°C.

M=L0×F0≒L1×F1≒L2×F2…(1) Also, the moment arm is
When 0 is fully open, L01, L11, and
Increases to L21. Even in this state, the moment M at each temperature is approximately the same as shown in equation (2) below, and the moment is approximately the same at any environmental temperature between 70°C and -30°C. Furthermore, in this state, the biasing force of the gas damper stay 26 at each temperature is reduced to F01, F11, and F21, respectively, so the moment M when the side door 10 is fully closed and the moment M when it is fully opened are 70°C. ~−30
It is almost the same at any environmental temperature between ℃. Furthermore, the moment at the intermediate opening degree from fully closed to fully open is also approximately the same at any environmental temperature between 70°C and -30°C.

M=L01×F01≒L11×F11≒L21×F21…(2) In addition, in Fig. 3, the symbol 68 is the fender panel,
70 is a door trim, and 72 is a weather strip.

Next, the operation of this embodiment will be explained.

When the environmental temperature is 20° C., which is the design temperature, the link 20 is in the position shown in FIG. . side door 1
0 is opened, the piston rod 30 of the gas damper stay 26 is extended from the cylinder tube 29 by gas pressure, and is swung about the ball joint 32 as a fulcrum to urge the side door 10 in the opening direction. Thereby, the side door 10 can be opened with reduced operating force. As the side door 10 is opened wide, the gas damper stay 26
The biasing force becomes smaller, but the moment arm around the axis HCL becomes larger, and the moment remains approximately constant over the entire range from fully closed to fully open the side door 10, so a stable operating feeling can be obtained. This also applies when the side door 10 is closed.

When the environmental temperature rises, the first piston rod 46 is drawn into the cylinder tube 40 against the gas pressure due to the expansion of oil in the temperature compensating stay 36 . As a result, the link 20 is swung and the ball joint 28, which is the attachment part of the gas damper stay 26 to the side door 10, is moved, and the axis GCL of the gas damper stay 26 is moved in the direction approaching the axis HCL of the hinge 14. be done. As the environmental temperature rises, the biasing force of the gas damper stay 26 increases, but the axis
Since the moment arm around HCL decreases,
The moment remains approximately the same as when the environmental temperature is 20°C.

Further, when the environmental temperature decreases, the oil in the temperature compensating stay 36 contracts, and the first piston rod 46 is extended from the cylinder tube 40 by gas pressure. As a result, the link 20 is swung in the opposite direction, the ball joint 28 is moved, and the axis GCL of the gas damper stay 26 is moved in a direction away from the axis HCL. The biasing force of the gas damper stay 26 decreases as the environmental temperature decreases, but the axis HCL
Since the moment arm around it increases, the moment remains approximately the same as when the ambient temperature is 20°C.

In this way, in the opening/closing body support structure using the gas damper stay of this embodiment, the mounting position of the gas damper stay 26 to the side door 10 can be adjusted to 70° by the temperature compensating stay 36 and the link 20 without any troublesome operations. It automatically changes steplessly to the optimal position depending on the environmental temperature in the range of ℃ to -30℃.

Furthermore, in this embodiment, as the opening degree of the side door 10 increases, the moment arm around the axis HCL increases, and the rate of increase in this moment arm corresponds to the rate of decrease in the biasing force of the gas damper stay 26. Therefore, the side door 10 can be operated with substantially constant force from fully closed to fully open.

FIG. 6 shows a second embodiment of the invention. This embodiment is applied to a back door 74 of an automobile, and the basic configuration is the same as that of the first embodiment, but the gas damper stay 26 is supported by the back door 74, which is an opening/closing body, and the link 20 and The stay 36 is supported by the main body of the vehicle. In the case of this embodiment, the gas damper stay 26 has a ball joint 28 that is attached to the vehicle body side, which is moved due to a change in environmental temperature, and its axis moves toward and away from the axis HCL of the hinge 14. It will be moved.

〔Effect of the invention〕

As explained above, in the opening/closing body support structure using the gas damper stay according to the present invention, the supporting position of the gas damper stay is automatically changed to the optimal position in response to changes in the environmental temperature. It has the effect of being able to compensate for temperature.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of an opening/closing body support structure using a gas damper stay according to the present invention applied to a side door of an automobile, and FIG. 1 is a schematic perspective view of the vicinity of the side door; Figure 2 is a perspective view of the side door seen from the back side, Figure 3 is a view taken along the - line in Figure 1, Figure 4 is a view taken in the - line direction of Figure 3, and Figure 5
Figure A is a layout diagram of the gas damper stay seen from the front of the vehicle, Figure 5B is a side projection view of Figure 5A, and Figure 6 is a perspective view showing a second embodiment of the present invention applied to a back door of an automobile. It is a diagram. 10... Side door (opening/closing body), 12... Roof part (main body), 14... Hinge, HCL... Axis line,
18...Pin, 20...Link (oscillating body), 26
...Gas damper stay, GCL...Axis line, 34...
...Front pillar (main body), 36...Temperature compensation stay (temperature compensation device), 74...Back door (opening/closing body).

Claims (1)

[Claims] 1. In an opening/closing body support structure using a gas damper stay that supports an opening/closing body which is pivotally supported by the main body and can be opened/closed, and is biased in the opening direction by a gas damper stay provided between the main body and the opening/closing body. , the gas damper stay is supported by a rocking body that is pivotally supported on the main body or the opening/closing body, so that the axis of the gas damper stay can move toward and away from the pivot support of the opening/closing body on the main body, and this rocking body An opening/closing body support structure using a gas damper stay, characterized in that a temperature compensator is connected to a temperature compensating device that operates in response to temperature changes to swing a rocking body.