JPH11189252A - System and method for attaching/detaching plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach/detach a plug to/from an opening for sealing easily and rapidly. SOLUTION: A plug is comprised of a plug-shaped plug body 12 having a sealing part 12B which can be inserted into an opening 11 of a work W and a flange part 13 provided on the body 12 in opposition to the insertion direction thereof, and a hole 15 is formed axially into the body 12 from the flange part 13. When forces are applied from the outside, the plug body 12 and flange part 13 contract radially, allowing the hole 15 to contract radially. When a plug 10 is attached to the opening 11, a first jig is inserted into the hole 15 to impact a pushing force to the plug so that the flange part 13 is brought into contact with a surface S of the work W to limit the insertion position of the plug. And if a second jig is inserted into the hole 15 to impact a pushing force, the flange part 13 falls into the hole 15, allowing the plug 10 to drop down in the same direction as the insertion direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug attaching / detaching system and a plug attaching / detaching method, and more particularly, to a plug attaching / detaching system and a plug which can be very easily and quickly attached to and detached from an opening forming a portion to be sealed. It relates to a detaching method.

[0002]

2. Description of the Related Art An opening for mounting a valve is formed in a wheel for mounting a tire. This type of wheel must not leak in the case of tubeless tires, so it is necessary to seal the inside and outside of the wheel with a plug at the valve mounting opening during a leak test at the wheel manufacturing stage. is there.

At the time of the test, for example, a plug stopper having a form as shown in FIG. 8 is used. The plug plug 30 has a cylindrical plug body 31 having a tapered surface 31A on the distal end and an outer peripheral surface formed as a seal portion 31B, and a rear end side opposite to the insertion direction of the plug body 31. And a flange portion 32 provided.
The plug 30 is entirely formed of rubber as a molding material, and the opening 33 is sealed by the seal portion 31B when the plug 30 is inserted into the opening 33 of the work W. .

When inserting the plug plug 30 into the opening 33, the taper surface 31A side of the plug main body 31 is slightly inserted by hand, and a rod-shaped jig 34 abutted against the flange portion 32 is used. This is performed by applying a pushing force in the direction of the arrow in the figure. On the other hand, when the plug plug 30 is removed, the flange portion 32 is gripped by an appropriate jig and pulled out in the direction opposite to the insertion direction.

[0005]

However, in the conventional plug plug 30, as shown in FIG. 8A, a partial expansion portion 31C is generated in the sealing portion 31B of the plug main body 31 at the time of insertion. It tends to be. This is due to the fact that the molding material is made of rubber in order to obtain a sealing effect, and that the outer diameter of the plug body 30 is set so that the insertion is in a press-fit state. Therefore, when the above-mentioned inflated portion 31C is generated, there is no allowance for the portion to escape and the flange portion 32
This causes an inconvenience that it becomes difficult to insert the surface up to a position where it comes into contact with the surface of the work W.

As shown in FIG. 8 (B), when the plug plug 30 is pushed in the insertion direction and is to be removed, the outer periphery of the flange 32 expands, and the plug 32 is renewed in the insertion direction. Even if a certain pushing force is applied, the plug stopper 30 cannot be removed in that direction. Therefore, the operation of removing the plug plug 30 is conventionally performed by using the flange 3
This was done by grabbing 2 and pulling it in the anti-insertion direction. However, since the plug stopper 30 has elasticity as a whole, it is not always easy to grasp the flange portion 32. In addition, the pulling force in the direction opposite to the insertion direction requires more labor than the pushing operation at the time of insertion, and together with the difficulty in mounting, the operation of attaching and detaching the plug 30 can be performed simply and quickly. There was a disadvantage that it could not be expected. In addition, the flange portion 32
Due to the inevitable operation of grasping the plug 32, the flange portion 32 may be damaged, and the plug plug 30 cannot be reused thereafter, which is disadvantageous in terms of economy. Was.

[0007]

SUMMARY OF THE INVENTION The present invention was devised in view of the inconvenience of the conventional example, and its object is to form a stopper with an extremely simple structure, and to easily attach and detach the stopper. It is an object of the present invention to provide a plug attaching / detaching system and a plug attaching / detaching method which can be performed quickly and can effectively avoid a damage factor at the time of attaching / detaching operation.

[0008]

In order to achieve the above object, the present invention relates to a plug attaching / detaching system for attaching / detaching a plug to / from a work using first and second jigs, wherein the plug has a cylindrical shape. A stopper having a bottom surface formed from the side of the stopper to the middle of the stopper body, the first jig comprising: The second jig is inserted into the hole and pushes the bottom surface when the second jig is inserted into the hole and pressed against the workpiece to prevent deformation of the stopper. The hole is provided in a shape that allows the diameter of the hole to be reduced, and the first jig is inserted into the hole and the plug body is pushed in so that the plug can be attached to the work, while the plug is attached to the work. By inserting the second jig into the hole and pushing it in, the diameter of the hole is reduced. Thereby dropping stoppered with deformation of the stopper, and employs a configuration that.

Further, the present invention is a stopper attaching / detaching system for attaching / detaching a stopper to / from a work using first and second jigs, wherein the stopper is a cylindrical stopper main body, A stopper formed to be able to regulate an insertion position and deformable by applying a predetermined pushing force; and a hole formed from the stopper side to the middle of the plug body and having a bottom surface, wherein the first The jig includes a portion that prevents the stopper from being deformed when inserted into the hole and presses the bottom surface, and the second jig is inserted into the hole and presses the bottom surface. The first jig is provided in a shape allowing the diameter of the hole to be reduced, and the plug can be attached to the work by inserting the first jig into the hole and pushing in the plug body. Insert the jig No. 2 into the hole and push it in. Thereby dropping the stoppered inlet the same direction, configuration is also employed that, but also tried to achievement of the objectives of the aforementioned by such configuration.

Further, the present invention is a plug attaching / detaching system for attaching / detaching a plug to / from a work using first and second jigs, wherein the plug is a cylindrical plug main body, and one end of the plug is attached to another end. The plug has a hole opening at one end side and having a bottom surface in the middle of the plug body, and the first jig is inserted into the hole portion to contact the bottom surface. The second jig is inserted into the hole, contacts the bottom surface, and contacts the work piece. The first jig is inserted into the hole, and the plug body is pushed in when the first jig is inserted into the hole so that the plug can be attached to the work. Inserting the second jig into the hole portion and pushing in with the plug attached to the plug, the insertion of the plug Direction and thereby dropping the plug in the same direction, taking the structure that is obtained by trying to achieve the above-described objects.

The present invention also relates to a plug attaching / detaching method for sealing the inside and the outside of an opening formed in a work, comprising: a plug main body having a seal portion insertable into the opening; A stopper provided on the direction side and capable of regulating the insertion position of the stopper main body, and a stopper provided with a hole formed from the stopper side to an intermediate position of the stopper main body, making it impossible to deform the stopper. Inserting the first jig into the hole, applying the pushing force to the jig to the position where the stopper regulates the insertion position, and attaching the plug into the opening, while allowing the stopper to be deformable. A method is adopted in which a jig is inserted into the hole, and the stopper is dropped into the opening while applying a pushing force to the second jig to drop the plug in the same direction as the insertion direction.

In the present invention, the stopper side is positioned in the direction opposite to the insertion direction with respect to the inside of the opening of the work. In this state,
The first jig is inserted into a hole extending from the stopper side into the plug body, and a pushing force is applied. At this time, the plug body is inserted in a manner of being pressed into the opening, and a large frictional force is generated against the seal portion. Since the force for inserting the plug body presses the tip of the first jig, that is, the bottom surface of the hole, a force for pulling the plug body in the longitudinal direction is generated by interaction with the frictional force generated in the seal portion. Since the plug body is made of an elastic material such as rubber, when it is subjected to a tensile force in the longitudinal direction, it tends to contract in its radial direction. Since an appropriate gap is provided between the hole of the plug main body and the first jig, the plug main body does not hinder the force to shrink in the radial direction.
Thereby, it is possible to insert while reducing the frictional resistance between the seal portion and the opening. When the stopper provided on the stopper body reaches the position where it comes into contact with the work,
The large diameter portion of the first jig prevents the plug body from trying to contract in the radial direction, and the insertion of the plug body is restricted at that position. Thereafter, by releasing the pushing force, the mounting of the stopper is completed.

When removing the plug from the opening, the second jig is inserted into the hole, and the pushing force is applied as it is in the insertion direction. At this time, since the second jig has a structure that allows the stopper to be deformed in the radial direction, the second jig is moved in the longitudinal direction of the plug body by the frictional resistance generated between the opening and the seal portion and the pushing force. A pulling force is generated, and as a result, a force contracting in the radial direction acts, and the stopper is deformed in a direction of being pulled into the opening by a cooperative action with the pulling force. Can be dropped off.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a plug according to the present embodiment, and FIGS. 2 and 3 are cross-sectional views showing a state where the plug is attached and detached. In these figures, a plug 10 is mounted on an opening 11 for mounting a valve of a work W composed of a wheel or the like. The plug 10 is formed of a rubber or the like that can be elastically deformed as a molding material. And a flange portion 13 as a stopper provided.

At the tip of the plug body 12 in the insertion direction, a tapered surface 12A is formed.
The outer peripheral surface of the plug body 12 connected to A is formed as a seal portion 12B. The outer diameter of the plug main body 12 is set to be slightly larger than the inner diameter of the opening 11, and is provided so that the insertion mode is press-fit.

The flange portion 13 is provided in such a size that the flange surface 13A on the insertion direction side can abut on the surface S of the work W. The flange portion 13 has a position where the flange surface 13A abuts on the surface S of the work W. The mounting position of the plug body 12 can be regulated.

A hole 15 is provided substantially on the center axis of the plug body 12 from the flange portion 13 side to an intermediate position of the plug body 12. The hole 15 is located at a position slightly in front of the tip of the plug body 12 without penetrating the plug body 12 and the bottom surface 1.
5A. Therefore, the plug body 1
When an external force is applied to the second seal portion 12B,
The plug body 12 and the flange portion 13 can be elastically deformed in the diameter reducing direction. The length of the hole 15 may be any length as long as it exceeds at least the thickness of the flange portion 13.

The attachment and detachment of the stopper 10 is performed by using first and second jigs 20, 21 schematically shown in FIGS. As shown in FIG. 2, the first jig includes a small-diameter rod 22 and a large-diameter rod 23 connected to the small-diameter rod 22. The outer diameter of the small-diameter rod 22 is set to be smaller than the inner diameter of the hole 15, and the outer peripheral surface of the large-diameter rod 23 It is set to the length located inside. Further, the outer diameter of the large-diameter rod 23 is set to be substantially equal to or slightly smaller than the inner diameter of the hole 15, so that elastic deformation of the flange portion 13 in the diameter-reducing direction is impossible. Have been.

As shown in FIG. 3, the second jig 21 is constituted by a small-diameter rod 25 having the same outer diameter in the axial direction. The outer diameter of the small diameter rod 25 is set to be substantially the same as the small diameter rod 22 in the first jig 20.

Next, a method of attaching and detaching the stopper 10 will be described with reference to FIG.
This will be described with reference to FIGS.

First, as shown in FIG. 6, the opening 11 of the work W is set with the tapered surface 12A side of the plug 10 as the tip on the insertion side.
The first jig 2 into the hole 15 from the flange portion 13 side.
The small-diameter rod 22 of 0 is inserted until it contacts the bottom surface 15A of the hole 15. Then, the tip of the plug 10 is inserted into the opening 11, and a pushing force is applied by the first jig 20. At this time, the sealing portion 12B of the plug body 12 comes into frictional contact with the inner surface of the opening 11, and the pushing force of the first jig 20 is changed to the hole 1
5 pushes the bottom surface 15A, so that a longitudinal pulling force is generated in the plug body 12, and as a result, the sealing portion 12B is elastically deformed in the direction of reducing the diameter, and the frictional resistance is inserted while reducing the resistance. be able to. On the other hand, as shown in FIG. 2, since the flange portion 13 is maintained in a state of being substantially in contact with the outer peripheral surface of the large-diameter rod 23 of the first jig 20, reduction in the radial direction is restricted. Flange surface 13
The subsequent insertion is physically restricted at the position where B contacts the surface S of the work W, and the position is set as the mounting completed position, and the insertion operation is completed.

Next, when removing the plug 10, a second jig 21 is used as shown in FIGS. That is, when the tip of the small-diameter rod 25 of the second jig 21 is pressed against the bottom surface 15A of the hole 15 to apply a pushing force, the inner surface of the opening 11 in the workpiece W and the sealing portion 12 are formed.
In the presence of the frictional resistance force generated between the plug 10 and the plug B, the pushing force is generated throughout the plug 10 as a pulling force in the longitudinal direction of the plug body 12. Therefore, the sealing portion 12B of the plug body 12 is deformed in the diameter reducing direction, and at the same time, the flange portion 1
3, the same deformation occurs, and the flange 13 falls into the opening 11 as shown in FIG. And
By applying a further pushing force, as shown in FIG. 5, the entire stopper 10 falls off in the insertion direction as it is. The dropped plug 10 can be removed after a leak test or the like is completed, and can be reused for another test. In order for the flange 13 to pass through the opening 11 smoothly, as shown in FIG.
It is desirable that the sum of the diameter a1 + a2 of 3 and the diameter b of the small-diameter rod 25 be equal to or smaller than the inner diameter of the opening 11.

Therefore, according to such an embodiment, since the hole 15 is formed substantially in the center of the plug main body 12 and the flange portion 13 along the axial direction, the hole 15 is inserted along with the insertion using the first jig 20. The pulling force acts on the plug body 12 between the force pressing the bottom surface 15A of the 15 and the frictional force acting on the seal portion 12B, and as a result, the plug body 12 can be deformed in the diameter reducing direction,
The effect of being able to mount the plug 10 extremely smoothly is that there is no generation of a conventional inflatable portion in the seal portion 12B of the plug main body 12.

In addition, the flange portion 13 acting as a stopper is connected to the plug body 12, and the large diameter portion 23 of the first jig 20 physically restricts the deformation of the flange portion 13 in the diameter reducing direction. Therefore, the fixed position mounting and the subsequent insertion regulation can be realized by the position where the flange portion 13 abuts on the surface S of the work W.

When removing the plug 10, the second
And the second jig 21 is provided with an outer diameter that allows the flange portion 13 to be deformed in the diameter-reducing direction, so that the pushing force is applied in the insertion direction as described above. , It is possible to remove the plug by pulling it, and it is possible to easily and quickly remove the plug from the conventional method in which the plug is removed by pulling.
In addition, since there is no need to grip any part of the plug 10 during this removal, the risk of damaging the plug 10 at the time of removal can be avoided, and the reusability of the plug 10 can be assured dramatically.

The plug 10 according to the present invention is not limited to the structure of the embodiment described above. For example, as shown in FIG. 7, a tapered surface 26 is provided between the plug body 12 and the flange 13. It can be replaced by one formed. According to this, when the plug 10 is removed, the flange portion 13 can be more smoothly dropped into the opening 11,
An additional effect is obtained that the subsequent removal can be performed with a small resistance. Further, the plug body 12 does not need to be long enough to have a plug shape as long as there is an area where the plug body 12 can be pressed into the opening 11 and the hole 15 can be formed. In short, the plug 10 according to the present invention can be variously changed in design when the first and second jigs 20 and 21 are used as long as the same operation as described above can be produced. Incidentally, the shape of the plug main body 12 may be a polygonal cylinder or the like in addition to the cylinder depending on the use. Further, as shown in FIG. 7, the bottom surface 15A side of the hole 15 may be tapered or hemispherical,
According to this, there is obtained an effect that the first and second jigs 20 and 21 come to the center at the time of contact with the bottom surface and are easily inserted in the longitudinal direction of the plug 10.

Further, in the above-described embodiment, the case where the flange portion 13 is employed as the stopper has been shown and described. However, as long as the stopper body 12 can be set at the predetermined mounting position, the shape of the stopper can be variously changed. It is. For example, a configuration in which a plurality of engagement pieces extending in the radial direction are provided at the end opposite to the insertion side of the plug main body 12 and the engagement pieces abut on the surface S of the workpiece W to regulate the insertion position is exemplified. it can.

Further, the present invention is used as a stopper particularly preferably used for a leak test on a road wheel of an automobile. However, when the present invention is used for other purposes that do not require a sealing property, for example, when used as a simple cap or the like, The plug 10 can be formed using a resin or a metal material as a molding material. In this case, by providing a split groove or the like extending in the axial direction in the plug main body, the same deformation as described above can be permitted, and the plug can be removed with a pushing force in the same direction as the insertion direction.

[0030]

The present invention is configured as described above, and
According to this, according to this, while adopting an extremely simple configuration of forming a hole reaching an intermediate position of the plug body, it is possible to easily permit the deformation of the plug body and simplify the mounting work, and By providing two types of jigs for use in the present invention, it is possible to provide a plug attaching / detaching system and a plug attaching / detaching method which have an unprecedented superior effect that the attaching / detaching can be performed easily and quickly with a pushing force in the same direction as the inserting direction. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a stopper according to the present embodiment is attached to an opening of a work.

FIG. 2 is a cross-sectional view showing a state where a stopper is mounted using a first jig.

FIG. 3 is a cross-sectional view illustrating an initial state when a stopper is removed using a second jig.

FIG. 4 is a cross-sectional view showing a deformed state when removing the stopper.

FIG. 5 is a cross-sectional view showing a state where the stopper is removed.

FIG. 6 is a perspective view showing an external configuration of the embodiment.

FIG. 7 is a sectional view showing a modification of the plug.

8 (A) and (B) are side views showing a conventional stopper.

[Explanation of symbols]

10 stopper, 11 opening, 12 stopper body, 1
2B: seal portion, 13: flange portion as stopper, 15: hole, 15A: bottom surface, 20:
1st jig, 21 ... 2nd jig, W ... Work

Claims (4)

[Claims] 1. A plug attaching / detaching system for attaching / detaching a plug to / from a work using first and second jigs, wherein the plug is a cylindrical plug main body, and regulates an insertion position of the plug main body. A stopper having a bottom and a hole formed from the stopper side to the middle of the plug body and having a bottom surface, wherein the first jig is inserted into the hole, abuts on the bottom surface and is pushed into the work. The second jig is provided in a shape that allows the diameter of the hole to be reduced when the second jig is inserted into the hole and the bottom surface is pressed in, the second jig is provided. By inserting the jig into the hole and pushing in the plug body, the plug can be attached to the work, while the second jig is inserted into the hole and pushed in with the stopper attached to the work. The stopper is dropped by the deformation of the stopper accompanying the diameter reduction of the hole. Plug removable system. 2. A plug attachment / detachment system for attaching / detaching a plug to / from a workpiece using first and second jigs, wherein the plug is a cylindrical plug main body, and regulates an insertion position of the plug main body. A stopper provided so as to be capable of being deformed by applying a predetermined pushing force, and a hole formed from the stopper side to the middle of the plug body and having a bottom surface, the first jig includes: A portion for preventing deformation of the stopper when inserted into the hole and pressing the bottom surface, wherein the second jig is inserted into the hole and reduces the diameter of the hole when the bottom surface is pressed. The first jig is inserted into the hole and the plug body is pushed in so that the plug can be attached to the work, while the second jig is attached to the work with the stopper attached. Into the hole and push it into Plug detachable system, characterized in that for dropping the plug direction. 3. A plug attachment / detachment system for attaching / detaching a plug to / from a work using first and second jigs, wherein the plug is a cylindrical plug main body, and one end is larger than other portions. A hole having an opening at one end side and having a bottom surface in the middle of the plug body, wherein the first jig is inserted into the hole portion and abuts on the bottom surface, and And a deformation preventing portion for preventing deformation of the one end portion when pushed in. The second jig is inserted into the hole, abutted against the bottom surface and pushed into the work. Sometimes, the hole is provided in a shape that allows the diameter of the hole to be reduced, and the first jig is inserted into the hole and the plug body is pushed in so that the plug can be attached to the work, while the plug is attached to the work. In this state, insert the second jig into the hole and push it in, so that it is in the same Plug detachable system, characterized in that for dropping the stoppered. 4. A plug attaching / detaching method for sealing the inside and outside of an opening formed in a work, comprising: a plug main body having a seal portion insertable into said opening; and a plug main body provided on a side opposite to the insertion direction of the plug main body. A first stopper for preventing deformation of the stopper by using a stopper having a stopper capable of restricting an insertion position of the stopper body and a hole formed from the stopper side to an intermediate position of the stopper body. A second jig that allows the stopper to be deformable while inserting the plug into the opening by applying a pushing force to the jig to a position where the stopper regulates the insertion position while the stopper is deformable. Insert into the hole,
A plug attaching / detaching method, wherein the stopper is dropped into an opening while applying a pushing force to the second jig, and the plug is dropped in the same direction as the insertion direction.