WO2011059026A1

WO2011059026A1 - Closing plug for vehicles

Info

Publication number: WO2011059026A1
Application number: PCT/JP2010/070111
Authority: WO
Inventors: 真一園田
Original assignee: 株式会社ニフコ
Priority date: 2009-11-12
Filing date: 2010-11-11
Publication date: 2011-05-19
Also published as: CN102612616B; JP2011121575A; CN102612616A; JP5498890B2

Abstract

The disclosed closing plug is equipped with: a flange, the undersurface of which can abut the periphery of a hole; an insertion section which is suspended from the undersurface of the flange and which can pass through the hole; a step section which projects outwards from the insertion section and can hold the periphery of the hole so that the periphery is clamped between the flange and the step section; an external wall surface which is positioned on the insertion section and provided between the step section and the flange, and which has approximately the same diameter as the inner diameter of the hole; and a pair of catches which protrude from both edges of the step section in the peripheral direction.

Description

Automotive plugs

The present invention relates to a plug for closing a hole such as a drain hole formed in a panel such as a floor board of an automobile.

Conventionally, as this kind of closure plug, there is known one having a flange portion and an insertion portion, and the insertion portion is provided with a plurality of radially engaging claws protruding from the outer peripheral surface ( (For example, see Patent Document 1, page 2, right column, lines 2-7, right column, page 15-18, and FIGS. 1-4).

No. 02-8867

However, the above-described conventional closure plug has a problem of high insertion force because it is press-fitted using the elasticity of the material of the locking claw.
Therefore, the present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to protrude from both end portions in the circumferential direction to the stepped portion protruding from the insertion portion. By providing a pair of claw portions, the claw portion is bent at the time of press-fitting, so that the insertion force of the insertion portion into the hole portion can be reduced.

The present invention has been made to achieve the above object, and the present invention is characterized by the following points.

The first is a closing plug that closes a hole formed in a panel of an automobile.
Secondly, the closure plug has the following configuration.
(1) Flange part A flange part is a thing in which a back surface can contact | abut to the peripheral part of a hole.

(2) Insertion part The insertion part hangs down from the back surface of the flange part and can pass through the hole part.
(3) Stepped portion The stepped portion extends from the insertion portion and can sandwich the peripheral portion with the flange portion.

(4) Outer peripheral wall surface The outer peripheral wall surface is located at the insertion portion, is provided between the stepped portion and the flange portion, and has substantially the same diameter as the inner diameter of the hole portion.
(5) Nail | claw part A nail | claw part protrudes from the both ends of the circumferential direction of a step part, respectively, and is formed in a pair.
The present invention may also include the following features.

That is, a plurality of, for example, three step portions are formed at a predetermined interval with respect to the circumferential direction of the insertion portion.
In addition, although three pieces were illustrated as the number of step parts, it is not limited to this, You may form two or four or more.
If it carries out like this, the insertion force of each step part can be reduced by forming several step parts at predetermined intervals with respect to the circumferential direction of an insertion part.

The present invention may also include the following features.

That is, a clearance groove is provided between the inner surface of the claw portion and the outer peripheral surface of the insertion portion to allow the claw portion to bend toward the outer peripheral surface of the insertion portion. If it carries out like this, a nail | claw part can be made easy to bend toward an escape groove.
The present invention may also include the following features.

That is, the back surface of the flange portion is provided with a recess that is recessed along the circumferential direction of the outer peripheral wall surface. If it carries out like this, distortion of a flange part can be prevented by providing a cyclic | annular recessed part in the back surface of a flange part, when attaching to a hole part.
The present invention may also include the following features.
First, between adjacent step portions, a groove portion that is recessed in the radial direction and a bridge-shaped inner wall that surrounds the groove portion and connects the claw portions of the adjacent step portions to each other are provided.
Secondly, the inner wall is bent inward in the radial direction and elastically bent when the claw is bent toward the groove by being pushed by the inner peripheral surface of the hole.
In this way, the bridge-shaped inner wall that connects the claws to each other is pushed by the inner peripheral surface of the hole, curved inward in the radial direction, and elastically bent, thereby accumulating a spring restoring force, and the spring The claw part can be made difficult to come off by elastically pressing the claw part toward the inner peripheral surface of the hole by the restoring force.

Since the present invention is configured as described above, the step portion protruding from the insertion portion is provided with a pair of claw portions respectively protruding from both ends in the circumferential direction, whereby the claw portion is bent at the time of press-fitting. By doing so, the insertion force of the insertion part to a hole part can be reduced.

FIG. 8 is a cross-sectional view taken along line AA in FIG. 7. It is a partial cross section figure of the panel of the state equipped with the obstruction | occlusion stopper concerning the 1st Embodiment of this invention. It is a top view which shows the hole of a panel. It is the perspective view of the state which looked at the obstruction | occlusion stopper from upper direction. It is the perspective view of the state which looked at the obstruction plug from the lower part. It is a side view of the obstruction stopper which made one half a section. It is a top view of an obstruction stopper. It is a bottom view of an obstruction stopper. It is sectional drawing which follows the BB line of FIG. FIG. 7 is a cross-sectional view taken along the line CC in FIG. 6. The 2nd Embodiment of this invention is shown, The figure is the state which inserted the insertion part of the obstruction | occlusion stopper in the hole of the panel, Comprising: It is a cross-sectional view of a half of an insertion part. It is the side view of the obstruction | occlusion stopper which showed the 2nd Embodiment of this invention and made one half a cross section. It is sectional drawing which follows the DD line | wire of FIG. Corresponding to FIG. 11, this figure explains the process of inserting the insertion portion of the obstruction plug into the hole of the panel, and is a cross-sectional view of a half of the insertion portion. The second embodiment of the present invention is shown, which is a longitudinal sectional view of a half of the obstruction plug, illustrating the process of inserting the insertion portion of the obstruction plug into the hole of the panel. A second embodiment of the present invention is shown, which illustrates a process of inserting the insertion portion of the obstruction plug into the hole of the panel, and is a cross-sectional view of the insertion portion.

(Occlusion stopper 10)
In the figure, reference numeral 10 denotes an obstruction plug according to the present invention. As shown in FIG. 2, the obstruction plug 10 closes a hole 21 such as a drain hole formed in a panel 20 such as a floor board of an automobile. Is to do.
In addition, although the floor board of the motor vehicle was illustrated as the panel 20, it is not limited to this, Moreover, although the drain hole was illustrated as the hole 21, it is not limited to this.

As shown in FIG. 3, the hole 21 is formed in a circular shape and penetrates the front and back surfaces of the panel 20.
The closing plug 10 is integrally formed of a thermoplastic resin having an appropriate elasticity and rigidity, for example, an olefin elastomer (TPO).
Specifically, as shown in FIGS. 1, 4, and 5, the closure plug 10 includes the following parts when roughly classified.

The following (1) and (2) will be described later.
(1) Flange part 30
(2) Insertion section 40
In addition, each part of the obstruction | occlusion stopper 10 is not limited to above-mentioned (1) and (2).
(Flange part 30)
As shown in FIG. 2, the flange portion 30 has a back surface that can come into contact with the peripheral edge portion of the hole portion 21.

Specifically, as shown in FIGS. 1, 4, and 5, the flange portion 30 is formed in an annular shape, and the outer peripheral edge thereof is an annular umbrella shape inclined obliquely downward toward the surface of the panel 20, or It is formed in a suction cup shape.
As shown in FIG. 1, a concave portion 31 that is annularly recessed along the circumferential direction of the outer peripheral wall surface is provided on the back surface of the flange portion 30 between the insertion portion 40 to be described later.
(Insert section 40)
As shown in FIGS. 1, 5, and 5, the insertion portion 40 hangs down from the back surface of the flange portion 30 and can pass through the hole portion 21 as shown in FIG. 2.

Specifically, as shown in FIGS. 1, 4, and 5, the insertion unit 40 includes the following units when roughly classified.
The following (1) to (4) will be described later.
(1) Outer cylinder 50
(2) Annular bottom wall 60
(3) Inner cylinder 70
(4) Annular groove 80
Each part of the insertion part 40 is not limited to the above (1) to (4).
(Outer cylinder 50)
As shown in FIG. 1, the outer cylinder 50 is formed in a cylindrical shape that hangs down from the back surface of the flange portion 30 and slightly sinks downward.

As shown in FIGS. 1, 4, and 5, the outer cylinder 50 includes the following parts when roughly classified.
The following (1) and (2) will be described later.
(1) Reduced diameter part 90
(2) Groove 100
In addition, each part of the outer cylinder 50 is not limited to the above (1) and (2).
(Annular bottom wall 60)
As shown in FIG. 1, the annular bottom wall 60 projects radially inward from the annular lower end of the outer cylinder 50 that is slightly recessed.
(Inner cylinder 70)
As shown in FIG. 1, the inner cylinder 70 is formed in a cylindrical shape that extends from the annular inner end of the annular bottom wall 60 and is slightly recessed upward.

The inside of the inner cylinder 70 is formed hollow, the upper surface thereof is closed, and the bottom is open.
(Annular groove 80)
As shown in FIG. 1, the annular groove 80 is formed between the inner cylinder 70 and the outer cylinder 50, the bottom is closed by the annular bottom wall 60, and the upper surface is open.
(Reduced diameter part 90)
As shown in FIGS. 1, 5, and 8 to 10, the reduced diameter portion 90 protrudes from the outer periphery from the outer cylinder 50, passes through the hole 21 of the panel 20 with a reduced diameter, and after passing, It is restored by the elasticity of the resin.

The reduced diameter portion 90 includes the following portions as shown in FIGS.
Each part of the reduced diameter portion 90 is not limited to the following (1) to (5).
(1) Step 91
1, 5, and 9, the step portion 91 projects from the outer peripheral surface of the reduced diameter portion 90 of the insertion portion 40 and sandwiches the peripheral edge portion with the flange portion 30 as shown in FIG. 2. It is possible.

Specifically, the step portion 91 is formed in a right triangle shape with a cross section having a horizontal surface facing the back surface of the flange portion 30 with the slope facing downward from the middle of the height of the reduced diameter portion 90. . Further, the step portion 91 is located at the center in the circumferential direction of the reduced diameter portion 90, and the length in the circumferential direction is set shorter than the length in the circumferential direction of the reduced diameter portion 90.
The diameter of the outer cylinder 50 at the step 91 is set larger than the inner diameter of the hole 21 of the panel 20.

(2) Outer wall surface 92
As shown in FIGS. 1 and 5, the outer peripheral wall surface 92 is located at the insertion portion 40, is provided between the step portion 91 and the flange portion 30, and has substantially the same diameter as the inner diameter of the hole portion 21. .
(3) Nail part 93
As shown in FIGS. 5 and 8 to 10, the claw portions 93 protrude from both end portions in the circumferential direction of the step portion 91 and are formed as a pair.

Specifically, the claw portions 93 are respectively positioned at both ends of a reduced diameter portion 90 surrounded by a groove portion 100 described later, and are formed in a tapered shape or a sharply sharp cross-sectional triangle or V-shaped cross-section. .
(4) Relief groove 94
As shown in FIGS. 5 and 8 to 10, the escape groove 94 is located between the inner surface of the claw portion 93 and the outer peripheral surface of a groove portion 100 described later of the insertion portion 40, and the claw portion 93 is inserted into the insertion portion 40. This is to allow bending toward the outer peripheral surface of the groove portion 100.

Specifically, the escape groove 94 is formed in an acutely sharp cross-sectional triangle or V-shape.
(5) Recess 95
The recess 95 is positioned on the outer peripheral surface of the reduced diameter portion 90 facing the annular groove 80 as shown in FIGS.
(Groove 100)
As shown in FIGS. 4, 5, and 7 to 10, the groove portion 100 is recessed from the outer periphery from the outer cylinder 50 and divides the reduced diameter portion 90 into a plurality of, for example, three in the circumferential direction.

Specifically, three grooves 100 are provided at intervals of 120 degrees.
The reason why the three groove portions 100 are provided at intervals of 120 degrees is to prevent the above-described reduced diameter portion 90 formed between the adjacent groove portions 100 from being positioned diagonally.
That is, if four diameter-reduced portions 90 are provided at intervals of 90 degrees, the diameter-reduced portions 90 are positioned on the diagonal line, so that the diameter-reduced portion 90 positioned in the diagonal direction is pushed by the hole 21 of the panel 20. There is a detrimental effect of increasing the insertion force by interfering with each other in an inward direction.

Although three grooves are illustrated as the number of the groove portions 100, there is a problem that the insertion force is increased. However, the number is not limited to this, and the diameter may be two or four or more. Similarly, the number of the reduced diameter portions 90 and the stepped portions 91 is not limited to three, and may be two or four or more.
On the other hand, as shown in FIGS. 7, 9, and 10, the inner periphery of the groove portion 100 is a convex portion 101 that protrudes toward the annular groove 80.
(how to use)
Next, a method for using the obstruction plug 10 having the above-described configuration will be described.

First, the insertion portion 40 of the closing plug 10 is inserted in accordance with the hole portion 21 of the panel 20 as shown in FIG.
When the insertion portion 40 is inserted, the step portion 91 comes into contact with the inner edge of the hole portion 21. Here, when the flange portion 30 of the closing plug 10 is strongly pushed toward the hole portion 21, the step portion 91 is pushed by the inner edge of the hole portion 21, and the reduced diameter portion 90 of the outer cylinder 50 is directed toward the annular groove 80. The outer diameter of the reduced diameter portion 90 is reduced and the stepped portion 91 advances into the hole portion 21.

Thereafter, when the step portion 91 passes through the hole portion 21, the reduced diameter portion 90 is restored by the elasticity of the resin. At this time, the step portion 91 abuts on the back surface of the panel 20, and the panel 20 is displayed between the flange portion 30 and the flange portion 30. By holding the scissors from the back surface, the blocking plug 10 is fixed to the hole 21.
At this time, the outer peripheral wall surface 92 of the reduced diameter portion 90 is located inside the hole portion 21.
(Tolerance of panel 20 thickness)
On the other hand, when the insertion portion 40 is inserted, the suction cup-shaped flange portion 30 is pushed by the surface of the panel 20 and bends upward, and is elastically pressed against the surface of the panel 20 by the elastic restoring force of the resin.

For this reason, the water tightness can be improved by the flange portion 30 being elastically pressed against the surface of the panel 20.
Further, due to the elastic restoring force of the flange portion 30, a force in the direction of coming out of the through hole 21 acts on the insertion portion 40. For this reason, the stepped portion 91 strongly contacts the back surface of the panel 20.
Since the stepped portion 91 strongly contacts the back surface of the panel 20, it is possible to prevent the insertion portion 40 from rattling in the through hole 21.

In addition, since the annular recess 31 is formed in the flange portion 30, the recess 31 has a relief shape, and distortion when the flange portion 30 is bent can be prevented. For this reason, it is possible to prevent the flange portion 30 from coming into non-uniform pressure contact with the surface of the strain panel 20 and to improve water tightness.
On the other hand, even when the thickness of the panel 20 changes, although not shown, the change in the thickness of the panel 20 can be absorbed by the change in the amount of deflection of the flange portion 30.

As a result of the experiment, the watertightness could be maintained even when the thickness of the panel 20 changed about twice.
(Tolerance of inner diameter of hole 21)
When the inner diameter of the hole portion 21 is less than the outer diameter of the entire reduced diameter portion 90 excluding the stepped portion 91, the claw portion 93 comes into contact with the inner edge of the hole portion 21. Here, when the closing plug 10 is strongly pushed toward the hole portion 21, the claw portion 93 is pushed by the inner edge of the hole portion 21 and is bent toward the escape groove 94 between the groove portion 100, thereby reducing the diameter. The outer diameter of the portion 90 is reduced, and the step portion 91 advances into the hole portion 21.

Thereafter, the stepped portion 91 passes through the hole portion 21, so that the closing plug 10 is fixed to the hole portion 21. At this time, in a state where the claw portion 93 is pressed against the inner edge of the hole portion 21, It elastically contacts the inner edge of the hole 21 by the elastic restoring force.
For this reason, it is possible to prevent backlash of the insertion portion 40 in the through hole 21.
Further, at the time of insertion, the insertion force can be reduced by the claw portion 93 being pushed by the inner edge of the hole portion 21 and being bent toward the escape groove 94.

At the same time, the allowance of the inner diameter of the hole 21 can be improved by the bending of the claw portion 93.
As a result of the experiment, water tightness could be maintained even if the inner diameter of the hole 21 changed by plus or minus about 5%.

(Second Embodiment)
Next, another embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 11, the present embodiment is characterized in that a bridge-shaped inner wall 200 that connects the claws 93 to each other is pushed by the inner peripheral surface of the hole 21 and curved inward in the radial direction. It is the point which made it flex.
That is, as shown in FIGS. 11 to 14, the insertion portion 40 of the closure plug 10, as shown in FIGS. 11 to 14, surrounds the groove portion 100 that is recessed in the radial direction, and is adjacent to the groove portion 100. A bridge-shaped inner wall 200 that connects the claw portions 93 of the step portion 91 to each other.
As shown in FIG. 13 and FIG. 14, the groove portion 100 has a concave shape inward in the radial direction, and an end surface thereof is open outward in the radial direction.
As shown in FIGS. 13 and 14, the inner wall 200 has a channel-shaped cross section or a “K” shape of a katakana with the claws 93 of the adjacent stepped portions 91 connected to both ends and surrounding the three sides of the groove 100. Is bent. In addition, between the both end portions of the inner wall 200 and the claw portion 93, the inner wall 200 is deformed by bending the cross section into a “Z” shape with an alphabetic capital letter compared to when the cross section is bent into a crank shape. Has been made easier.
In the description of the present embodiment, the same components as those in the first embodiment described above with reference to FIGS. 1 to 10 are denoted by the same reference numerals and the description thereof is omitted.

When the insertion portion 40 of the obturator plug 10 having the above-described configuration is inserted in accordance with the hole 21 of the panel 20 as shown in FIG. 14, it is formed on the inner peripheral surface of the hole 21 as indicated by the arrow in FIG. When pressed, the claw portion 93 bends toward the groove portion 100.
At that time, as shown in FIG. 11, the inner wall 200 is curved inward in the radial direction, for example, the letter “C” of the capital letter of the alphabet or “Ω” (omega) of the capital letter of the Greek letter, Elastically bends.
By bending and bending the inner wall 200, a spring restoring force that is an elastic restoring force of the resin is accumulated, and the claw portion 93 is elastically pressed toward the inner peripheral surface of the hole 21 by the spring restoring force. The nail part 93 can be made difficult to come off.

On the other hand, as shown in FIG. 12, the flange portion 30 of the closing plug 10 is formed in an annular shape, and its outer peripheral edge is formed in an annular umbrella shape or suction cup shape inclined obliquely downward toward the surface of the panel 20. ing. Further, since the annular groove 80 is formed between the inner circumference 50 of the outer cylinder 50 having the flange portion 30 and the outer circumference of the inner cylinder 70, the suction cup-shaped flange portion 30 is easily deformed. .
When the insertion portion 40 of the blocking plug 10 is inserted into the hole portion 21 of the panel 20, the flange portion 30 is pushed against the surface of the panel 20 as shown in FIG. Bend upward as shown. At this time, the outer periphery of the tip end portion of the suction cup-shaped flange portion 30 is elastically adhered to the surface of the panel 20, and water-tightness can be maintained by the suction cup-shaped flange portion 30 alone.
The specification, claims, drawings and Japanese Patent Application No. 2009-258580 filed on Nov. 12, 2009 and Japanese Patent Application No. 2010-177302 filed on Aug. 6, 2010. The entire contents of the abstract are hereby incorporated by reference as the disclosure of the specification of the present invention.

Claims

In the closure plug that closes the hole made in the panel of the automobile,
In the plug,
A flange portion whose back surface can come into contact with a peripheral edge portion of the hole portion;
An insertion part that hangs down from the back surface of the flange part and can pass through the hole part;
A stepped portion that projects from the insertion portion and can sandwich the peripheral portion with the flange portion,
An outer peripheral wall surface located at the insertion portion, provided between the stepped portion and the flange portion, and having substantially the same diameter as the inner diameter of the hole portion;
An automotive closure plug, comprising: a pair of claw portions projecting from both ends in the circumferential direction of the stepped portion.
An automotive closure plug according to claim 1,
A plurality of the stepped portions are formed at predetermined intervals with respect to the circumferential direction of the insertion portion.
An obstruction plug for an automobile according to claim 1 or 2,
Between the inner surface of the claw portion and the outer peripheral surface of the insertion portion,
A closure plug for an automobile, wherein a relief groove is provided to allow the claw portion to bend toward the outer peripheral surface of the insertion portion.
A plug for automobile according to any one of claims 1 to 3,
On the back surface of the flange portion,
An automotive closure plug, comprising a recess recessed along the circumferential direction of the outer peripheral wall surface.
A plug for an automobile according to claim 2,
Between the adjacent steps,
A groove recessed in the radial direction;
A bridge-shaped inner wall that surrounds the groove and connects the claw portions of the adjacent stepped portions to each other;
The inner wall is
An obstruction plug for an automobile, which is bent radially inward and elastically bent when the claw is bent toward the groove by being pushed by the inner peripheral surface of the hole. .