JPH0716499Y2 - Stage damper - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a stay damper, and more particularly to improvement of a stay damper most suitable for use in a back door of an automobile.

[Conventional technology]

BACKGROUND ART It is well known that a stay damper is used as a means for reducing the operation force when opening and closing a back door of an automobile.

As a stay damper as a means for reducing the operating force, for example, there is a usage form as shown in FIG.

That is, the stay damper S is pivotally mounted by using a mounting pin (not shown) fixed to the body B side of the automobile with the bracket 3 at the bottom side end of the cylinder body 1 and is projected and retracted in the cylinder body 1. The bracket 4 at the end of the rod body 2 is supposed to be pivotally mounted by using a mounting pin (not shown) fixed to the back door D side of the automobile.

The back door D and the body B are centered on the rotation center C, and an imaginary line arrow d in FIG.
It is said that it will be opened and closed as shown in.

Also, the stay damper S tends to contract when the back door D is closed, and the stay damper S when the back door D is opened.
Will operate in the stretching direction.

Therefore, the back door D in the vehicle equipped with the stay damper S can be easily opened by the extension force of the stay damper S.

That is, the back door D can be easily opened even if it is made large and heavy.

[Problems to be solved by the invention]

However, the above-mentioned proposal of the stay damper S has a disadvantage that the back door D of the automobile cannot be stopped at the opening position.

That is, the stay damper S itself can be extended to the so-called full stroke at the time of the extension operation, and in addition, the upper and lower end brackets 1a and 2a of the stay damper S and the mounting pins on the body B side and the back door D side of the automobile are attached. Since the back door D itself can be freely rotated, the rotation of the back door D itself is stopped by an appropriate means, or unless the stay damper S itself is formed so as to be able to stop the extension at an arbitrary extension position. The back door D is so-called fully opened.

Therefore, for example, when the user of the vehicle is a short person, the tip of the back door D cannot be reached without so-called stretching, or in extreme cases, the stay damper S can be reached. The stay damper S acts as a so-called handle instead of applying a force, and a desired so-called door closing operation must be performed.

If the stay damper S itself is made to have expansion and contraction multi-stage performance in order to stop and open the back door D at an intermediate position, the stay damper S itself becomes extremely expensive and is not adopted. Even if the means for stopping the opening of the back door D on the way is formed between the back door D and the body B, the design change of the automobile itself is invited, and the adoption thereof is not realized.

Therefore, the present invention is a stay damper that allows the back door of an automobile to be halfway opened and stopped by an extremely simple means without causing unnecessary design changes to the stay damper and the body and back door of the automobile. The purpose is to newly provide.

[Means for solving problems]

In order to solve the above-mentioned problems, in the structure of the stay damper according to the present invention, a bracket disposed at one end of the stay damper can rotate a mounting pin disposed on either a body side or a back door side of an automobile. A circle having a hole for inserting a pin, which is a circular hole to be inserted, and a bracket provided at the other end of the bracket for rotatably inserting a mounting pin provided on either the body side or the back door side of the automobile. A pin insertion hole formed of a hole, and the pin insertion hole in the bracket at the other end is fitted with a protrusion formed on a part of the shaft portion of the mounting pin inserted into the hole. The groove is formed in a part of the circular hole.

Further, it is assumed that the projection is formed in a single rib-like shape, while the groove into which the rib-like projection is fitted is formed in a single or a plurality of holes in the pin insertion holes.

In addition, the protrusion may be a male spline and the groove may be a female spline.

Further, it is assumed that the pin insertion hole having the groove is formed in the bracket arranged at the bottom side end of the cylinder body.

[Action]

When the shaft portion of the mounting pin, that is, the shaft portion without the protrusion is inserted into the pin insertion hole of the bracket, the protrusion cannot interfere with the groove formed in the pin insertion hole. In this state, therefore, the bracket can be freely rotated with respect to the mounting pin.

When the protrusion formed on the mounting pin is fitted into the groove formed in the pin insertion hole, rotation of the bracket with respect to the mounting pin is blocked.

The fitting of the projection into the groove and the release of the projection are due to the external force acting in the axial direction of the mounting pin on the bracket.

〔Example〕

 Hereinafter, the present invention will be described based on the illustrated embodiments.

As shown in FIG. 1, a stay damper S according to the present invention
Has a rod body 2 inserted into the cylinder body 1 so as to be retractable, a bracket 3 is attached to the bottom side end of the cylinder body 1, and a bracket 4 is attached to the tip end of the rod body 2. It is attached.

Mounting pins 5 and 6 to be described later are attached to the brackets 3 and 4, respectively.
Circular holes 3a, 4a are formed as holes for inserting the mounting pins 5, 6 into the circular holes 3a, 4a, respectively. Is going to be done.

Further, in the present embodiment, the mounting pins 5 and 6 are arranged such that one of the mounting pins 5 is fixed to the back door D side of the automobile by welding, and the other mounting pin 6 is arranged. Argues that the base portion 6a is fixedly attached to the body B side of the automobile by welding.

Also, the mounting pins 5 and 6 are those in which the shaft portions 5b and 6b are planted in the center of the base portions 5a and 6a, and the shaft portions 5b and 6b are respectively placed in the circular holes 3a and 4a. It is said to be inserted so that it can rotate freely.

In addition, an annular groove 6c is formed on the tip side of the shaft portion 6b of the mounting pin 6, and after the shaft portion 6b is inserted into the circular hole 4a of the opposing bracket 4, the annular groove 6c is inserted. By fitting the E-ring 7 on the bracket 4, the mounting pin 6 and the bracket 4 can be maintained in the pivotally connected state.

A rib-shaped projection 5c is provided on a part of the shaft portion 5b of the mounting pin 5, that is, on the tip end side in this embodiment.

Then, the projection 5c is formed so that the axial direction of the shaft portion 5b and the axial direction of the shaft portion 5b coincide with each other, and the length thereof is the shaft portion.
It is set to be approximately half the length of 5b.

On the other hand, the bracket 3 arranged at the bottom side end of the cylinder body 1 has a groove 3b formed by cutting out a part of the circumference of the circular hole 3a.

The groove 3b is formed in a shape that allows the protrusion 5c to be fitted therein, and in the present embodiment, one location,
That is, it is considered to be singular.

Therefore, when the base end side of the shaft portion 5b of the mounting pin 5 is inserted into the circular hole 3a of the bracket 3 (see the solid line diagram in FIG. 2), the bracket 3 rotates with respect to the mounting pin 5. It will be connected freely, and as shown in FIG.
When the protrusion 5c of the shaft portion 5b of the mounting pin 5 is fitted into the groove 3b of the circular hole 3a of the bracket 3 (see the phantom diagram in FIG. 2), the bracket 3 is attached to the mounting pin 5 with respect to the mounting pin 5. Therefore, they are connected in a so-called fixed state in which the rotation is blocked.

As a result, when the back door D is opened while the connecting state between the mounting pin 5 and the bracket 3 is in the so-called rotatable state as shown by the solid line in FIG. 2, the imaginary line arrow d in FIG.
As shown in, the extension of the stay damper S is allowed until the stroke end, and the back door D is
The bracket 3 will be opened so-called as much as possible.
The rotation position of is the protrusion 5c of the mounting pin 5 and the groove 3b of the bracket 3.
When it comes to a position where it can be fitted with, the moving operation of the stay damper S is performed as shown by the solid line arrow P in FIG. 2 and so-called rotation stop is performed as shown in the imaginary line diagram in FIG. When the state is brought into a state, as shown by an imaginary line arrow d ₁ in FIG. 4, the extension of the stay damper S is stopped halfway, and the back door D is stopped halfway open. Become.

That is, even when the user of the vehicle is a short person, it is possible to stop the opening of the back door D at an intermediate position where the hand of the person can easily reach.

Further, if the fitting between the protrusion 5c and the groove 3b is released, the back door D can be further opened as shown by an imaginary line arrow d ₂ in FIG. 4, and the so-called door closing can be performed. Will be acceptable.

In this embodiment, the mounting pin 5 is attached to the bracket 3
After the insertion of the stopper member 8, as shown in FIG. 1, the stopper member 8 is inserted in the screw portion 5d formed inside the tip of the shaft portion 5b.
The bracket 3 is prevented from coming off from the mounting pin 5 by screwing.

In the embodiment described above, the projection 5c formed on the shaft portion 5b of the mounting pin 5 and the circular hole of the bracket 3 into which the projection 5c is fitted.
Although the number of the grooves 3b of 3a is singular, it is needless to say that the number of the grooves 3b may be plural instead of this.

In this case, it goes without saying that the opening of the back door D can be stopped in the middle of multiple stages.

Further, in the above-described embodiment, the rotation of the bracket 3 with respect to the mounting pin 5 is prevented by the engagement of the projection 5c and the groove 3b corresponding thereto, but instead of this, the mounting pin 5 is replaced. A so-called spline connection may be allowed between the upper end side of the shaft portion 5b and the circular hole 3a of the bracket 3 so that the rotation can be prevented.

In this case, when the back door D is opened, it is possible to stop the opening midway in multiple stages at an extremely fine angle.

[Effect of device]

As described above, according to the present invention, it is possible to open the back door of the automobile entirely, and it is possible to stop the door halfway during the opening.

Further, according to the present invention, it is sufficient to make a slight modification to the mounting pin arranged on the automobile side and a slight modification to the bracket, which causes a great design change on the automobile side. There is no advantage.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a stay damper according to an optimum embodiment of the present invention with a mounting pin partially broken away, and FIG. 2 is a partial sectional view showing an engagement state between a bracket and a mounting pin. FIG. 4 is a partial sectional view showing a state in which the projection of the shaft portion of the mounting pin is fitted in the groove of the hole of the bracket, and FIG. 4 shows the operating state of the stay damper of the present invention mounted on an automobile together with the open state of the back door. FIG. 5 is a schematic diagram showing an open / closed state of a back door in a vehicle equipped with a conventional stay damper, similar to FIG. 1 ... Cylinder body, 2 ... Rod body, 3,4 ... Bracket, 3a, 4a ... Circular hole, 3b ... Groove, 5,6 ... Mounting pin, 5b, 6
b ... Shaft, 5c ... Protrusion, 7 ... E-ring, 8 ... Stopper, B ... Body, C ... Center of rotation, D ... Backdoor, S ... Stay damper.

Claims (4)

[Scope of utility model registration request] 1. A bracket disposed at one end has a pin insertion hole formed of a circular hole into which a mounting pin disposed on either a body side or a back door side of an automobile is rotatably inserted. The bracket disposed at the other end has a pin insertion hole formed of a circular hole for rotatably inserting the mounting pin disposed on either the body side or the back door side of the automobile. A hole for inserting a pin in the bracket at the other end is formed in a part of a circular hole into which a projection formed to project on a part of a shaft part of a mounting pin inserted in the hole is fitted. Characteristic stay damper 2. A utility model registration claim 1 in which a single projection is formed in a rib shape, and a single groove or a plurality of grooves for fitting the rib projection are formed in a hole for inserting a pin. Listed stay damper 3. The projection is a male spline,
The stay damper according to claim 1, wherein the groove is a female spline. 4. A stay damper according to claim 1, wherein a pin insertion hole having a groove is formed in a bracket arranged at the bottom side end of the cylinder body.