JPH085401Y2 - Back door opening adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a back door opening adjustment mechanism for a vehicle.

(Prior Art) As a spring for holding a back door of an automobile, a hood, a cover of a copying machine, a sliding roof, or the like in an open or closed state, for example, a gas spring as described in Japanese Patent Publication No. 62-19613. It has been known.

This gas spring defines two gas chambers inside a cylinder filled with gas by a piston fixed to a piston rod, and these gas chambers communicate with each other through a small hole formed in the piston, The extension of the rod of the gas spring is locked by the flow of gas through the small hole.

(Problems to be solved by the invention) In the above-described conventional gas spring, since the length of the fully extended extension is fixed, when used as an open stay of the back door, the opening degree above the back door is increased. Will also be decided. Therefore, the length of the gas spring is set to an average value in consideration of conditions such as luggage entry / exit and person's height.

Therefore, when the height of the person who opens and closes the back door is short, it is out of reach when closing the back door, and conversely, when the height is high, the head may hit the open back door, making it impossible I have no choice but to take it.

(Means for Solving the Problems) In order to solve the above problems, according to the present invention, a stay is provided with a valve that opens and closes a gas flow path so that the valve can swing a lever whose one end can abut. An adjuster bolt for adjusting the initial position of the lever is provided on the other end side of the lever, and a projecting portion with which one end side of the lever abuts is provided on the vehicle body side.

(Operation) When the back door is opened, one end of the lever comes into contact with the protrusion on the vehicle body side to allow the stay valve to enter to close the gas flow passage and lock the extension of the stay. At this time, the lever is adjusted by the adjuster bolt. Since the opening of the door until one end of the lever comes into contact with the protrusion on the vehicle body is changed by adjusting the initial position of, the opening of the door can be adjusted steplessly.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic rear view of a vehicle to which a back door opening adjusting mechanism according to the present invention is applied, FIG. 2 is a sectional view of a stay of the mechanism, and FIG. 3 is an enlarged sectional view of a main part of the stay. .

The back door 1 is rotatably supported by a shaft 3 at a rear portion of a body 2 of an automobile, and a stay 4 composed of a gas spring is provided between the back door 1 and the body 2. Stay 4
The inner cylinder 6 is arranged inside the outer cylinder 5. That is, the upper end of the outer cylinder 5 is closed by the cap 7 and the housing 8, the upper end of the inner cylinder 6 is fitted to the inner end of the housing 8, and the rod guide 9 and the oil seal are attached to the lower end of the outer cylinder 5. The inner cylinder 6 is fitted with the sleeve 11, and the lower end portion of the inner cylinder 6 is fitted into the sleeve 11 so that the outer cylinder 5 and the inner cylinder 6 are fitted.
A passage 12 is formed between and.

Also, the rod guide 9, the oil seal 10 and the sleeve
The piston rod 14 is inserted into the inner cylinder 6 through 11 and a piston 17 slidably contacting the inner peripheral surface of the inner cylinder 6 is fixed to the tip end of the piston rod 14, and the inner cylinder 6 is moved by the piston 17. Two gas chambers S1 and S2 are defined, and a mounting bracket 18 is fixed to the rear end of the piston rod 14.

The piston 17 has a through hole that connects the gas chambers S1 and S2.
20 is formed, the portion of the piston 17 on the gas chamber S1 side is a male taper surface 21, and a washer 22 having a hole formed in the step portion of the piston 17 and piston rod 14 is sandwiched between the washer 22 and the male taper surface. A steel ball 23 for opening and closing the through hole 20 is housed in a space surrounded by 21 and the inner peripheral surface of the inner cylinder 6.

Also, as shown in FIG. 3, a through hole 25 is formed in the housing 8 in the axial direction, and a hole 26 that connects the through hole 25 and the passage 12 is formed in the radial direction. Inserts a spool valve 27 slidably, and forms a large-diameter stopper portion 28 facing the gas chamber S2 at one end of the spool valve 27,
Further, the other end of the spool valve 27 penetrates the cap 8 and a mounting bracket 31 described later from the housing 8 and protrudes to the outside. Further, the spool valve 27 is formed with a passage 29 for communicating the hole 26 and the gas chamber S2. There is.

Further, a mounting bracket 31 is attached to the upper surface of the cap 7, and a lever 32, which can be in contact with one end of one side of the spool valve 27, is pivotally supported by a shaft 33 on the bracket 31. The adjuster bolt 34 is screwed to the bracket 31 from below so that the adjuster bolt 34 can move forward and backward, and is fixed with the lock nut 35.The tip of the adjuster bolt 34 is made to face the other end of the lever 32 to adjust the initial position of the lever 32. It is possible.

As shown in FIG. 1, the stay 4 pivotally supports the bracket 18 on the back door 1 by means of a shaft 38, and a bracket
31 is rotatably supported on the body 2 by a shaft 39, and is interposed between the back door 1 and the body 2. The body 2 is provided with a protrusion 40 with which the other end of the lever 32 of the stay 4 abuts.

The operation of the door opening adjustment mechanism configured as described above will be described below.

First, when the back door 1 is closed, the spool valve 27 is pushed out by the gas pressure filled in the stay 4 and pushes the lever 32 in the direction of arrow D in FIG. The portion swings at a position where it abuts on the adjuster bolt 34. The gas chamber S2 of the mater 4 is in communication with the gas chamber S1 through the passage 29, the hole 26 and the passage 12 of the spool valve 27, and at this time, the pressure receiving area of the piston 17 on the gas chamber S2 side is the gas chamber S1 side. Is larger than the pressure receiving area, the force in the direction of projecting the piston rod 14 acts on the piston rod 14 according to the difference in the pressure receiving area.

Then, by unlocking the back door 1 from this state, the piston rod 14 of the stay 4 projects and the back door 1 opens. At this time, the stay 4 rotates in the direction of the arrow A in FIG. Rotate.

Then, when the back door 1 is opened to the position shown by the phantom line in the figure, one end of the lever 32 of the stay 4 is moved to the body 2
Since the lever 32 swings in the direction of arrow C in FIG. 2 and pushes the spool valve 27 into the stay 4 as shown in FIG. Is cut off, the piston rod 14 stops projecting, the stay 4 is locked, and the back door 1 stops.

In this case, the initial position of the lever 32 changes and changes depending on the amount of the adjuster bolt 34 entering, and the opening degree of the back door 1 when the lever 32 contacts the protrusion 40 of the body 2 changes.
When the adjuster bolt 34 is screwed to increase the amount of entry, the opening of the back door 1 when the lever 32 comes into contact with the protrusion 40 of the body 2 increases, and the adjuster bolt 34 is retracted to reduce the amount of entry. Sometimes the opening of the back door 1 when the lever 32 contacts the protrusion 40 of the body 2 becomes small, so that the opening of the back door 1 can be adjusted steplessly.

When the back door 1 is closed from the open state, the piston rod 14 is pushed by lowering the back door 1, and at this time the steel ball 23 separates from the through hole 20,
The gas chambers S1 and S2 are directly communicated with each other through the through hole 20 so that the piston rod 14 can move.

Further, when it is desired to stop the back door at an arbitrary position, when the spool bolt 27 is pushed into the stay 4 by screwing the adjusting bolt while holding the back door at the arbitrary position, it is locked at that position.

As described above, according to the present invention, when the back door is opened, one end of the lever comes into contact with the protrusion on the vehicle body and the stay valve is advanced to close the gas flow path. Since the extension of the stay is locked, by adjusting the initial position of the lever with the adjuster bolt, it is possible to change the opening of the door until one end of the lever abuts the protrusion on the vehicle body, The opening can be adjusted steplessly. Thereby, the opening degree of the back door can be adjusted according to the height and the like.

It is also possible to stop the back door at any position.

[Brief description of drawings]

FIG. 1 is a schematic rear view of a vehicle to which a back door opening adjusting mechanism according to the present invention is applied, FIG. 2 is a sectional view of a stay of the mechanism, and FIG. 3 is an enlarged sectional view of a main part of the stay. . In the drawings, 1 is a back door, 2 is a body, 4 is a stay, 5 is an outer cylinder, 6 is an inner cylinder, and 8 is a cylinder.
Is a housing, 12 is a passage, 14 is a piston rod, 27 is a spool valve, 31 is a mounting bracket, 32 is a lever, 34
Is an adjuster bolt, and 40 is a protrusion of the body.

Claims (1)

[Scope of utility model registration request] 1. A back door having a stay composed of a gas spring interposed between the stay and a vehicle body. A valve for opening and closing a gas passage is provided in the stay so that the stay can move forward and backward. A lever, one end of which can abut on the valve, is swingably provided, an adjuster bolt for adjusting the initial position of the lever is provided on the other end of the lever, and one end of the lever abuts on the vehicle body side. An opening adjustment mechanism for a back door, which is provided with a protrusion.