JP2018069496A - Cap unit for puncture repairing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for surely preventing a backflow of a puncture repairing liquid into a first flow channel.SOLUTION: A cap unit for puncture repairing includes a check valve mechanism 6 that prevents a backflow of a puncture repairing liquid from a bottle container 2 into a first flow channel 3 that introduces compressed air from a compressor 8 into the bottle container 2. The check valve mechanism 6 includes: a ball valve 30 disposed in a valve housing region Y between an upper opening part 3U of the first flow channel 3 and a valve seat part 20, a lid plate 31 disposed in the upper opening part 3U, and a connection part 31 that interlinks the ball valve 30 and the lid plate 31 in a manner that allows a simultaneous vertical movement.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cap unit for puncture repair that repairs a puncture emergency by sequentially injecting a puncture repair liquid and compressed air into a punctured tire.

  For example, Patent Document 1 below proposes a cap unit for puncture repair. The cap unit is stored in the vehicle with the bottle container mounted in advance.

  As shown in FIG. 6, the proposed cap unit includes a first flow path b for taking compressed air from the compressor into the bottle container a, and puncture repair liquid and compressed air from the bottle container a by taking in the compressed air. And a cap body d having a second flow path c for sequentially taking out the. The upper ends of the first flow path b and the second flow path c are opened on the upper surface of the cap body d, respectively. Further, a cylindrical boss e surrounding the upper opening b1 of the first flow path b and the upper opening c1 of the second flow path c protrudes from the upper surface of the cap body d.

  The boss e is fitted with an inner cap f that covers the upper openings b1 and b2 to prevent the puncture repair liquid from leaking out of the cap unit when stored (unused). Yes. The inner cap f can be removed from the boss portion e by compressed air from the first flow path b during puncture repair, and the compressed air can be sent into the bottle container a.

  Here, at the time of puncture repair, first, all the air in the tire is evacuated, and then the tire and the cap unit with the bottle container are connected. However, if the tire is connected to the cap unit with the bottle container without accidentally venting the tire, residual compressed air in the tire flows backward into the second flow path c, the inner cap f is removed, and the puncture repair liquid May flow back into the first flow path b.

  In the case of the cap unit of Patent Document 1, a ball valve is provided in the first flow path b to prevent the back flow of the puncture repair liquid. However, since the ball valve is easy to move and unstable, this is not sufficient, and further improvement is desired.

JP 2010-023244 A

  Accordingly, an object of the present invention is to provide a cap unit for puncture repair that can more reliably prevent the backflow of the puncture repair liquid into the first flow path even when the inner cap is removed due to an erroneous operation or the like. .

The present invention attaches to the mouth of a bottle container containing puncture repair liquid, and also includes a first flow path for taking compressed air from the compressor into the bottle container, and puncture repair liquid from the bottle container by taking in the compressed air. And a cap body having a second flow path for sequentially taking out the compressed air and
And a check valve mechanism arranged in the first flow path for preventing the back flow of the puncture repair liquid from the bottle container,
In the reference posture in which the mouth portion of the bottle container faces downward, the first flow path is formed in a vertical flow path section that extends downward from an upper opening that opens in the bottle container, and the vertical flow path section. And the check valve mechanism is disposed on a valve accommodating region between the upper opening and the valve seat, and is disposed on the upper opening. A lid plate that closes the upper opening, and a connecting portion that connects the ball valve and the lid plate so as to be simultaneously movable up and down are provided.

  In the cap unit for puncture repair according to the present invention, it is preferable that the connecting portion has a shaft shape and is bonded to at least one of the ball valve and the cover plate.

  In the cap unit for puncture repair according to the present invention, it is preferable that the diameter D1 of the ball valve is not less than 0.7 times the inner diameter Di of the valve housing region.

  In the cap unit for puncture repair according to the present invention, the outer diameter D2 of the lid plate is preferably 1.5 times or less of the inner diameter Di of the valve housing region.

  In the cap unit for puncture repair according to the present invention, it is preferable that the ball valve is made of a metal material.

  In the cap unit for puncture repair according to the present invention, the lid plate is preferably made of a synthetic resin material.

  According to the present invention, a check valve mechanism disposed in a first flow path includes a ball valve that closes a valve seat portion of the first flow path, a disk-shaped lid plate that closes an upper opening of the first flow path, and a ball valve. And a cover plate are connected to each other so as to be movable up and down at the same time.

  Therefore, the first flow path can be closed at two locations, the valve seat portion and the upper opening portion, and even when the inner cap is removed due to an erroneous operation or the like, the puncture repair liquid is prevented from flowing back into the first flow path. It becomes possible to prevent reliably.

It is a perspective view which shows an example of the puncture repair kit using the cap unit of this invention. It is sectional drawing of the said cap unit. It is sectional drawing which expands and shows a check valve. (A), (B) is sectional drawing which shows the effect of this invention. (A), (B) is sectional drawing which further shows the effect of this invention. It is sectional drawing which shows the structure of the non-return valve of the conventional cap unit.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 shows an example of a puncture repair kit K using the cap unit 1 of the present invention. This puncture repair kit K includes a cap unit 1, a bottle container 2, and a compressor 8. The puncture repair liquid and compressed air are sequentially injected into the punctured tire to repair the puncture quickly.

  FIG. 2 is a sectional view of the cap unit 1 and shows a state in which the bottle container 2 is mounted. The bottle container 2 has a well-known structure in which a small-diameter cylindrical mouth portion 2A for taking out the puncture repair liquid is protruded from the lower end of the container section 2B for storing the puncture repair liquid. Below, the cap unit 1 is demonstrated in the reference | standard attitude | position which the opening part 2A of the bottle container 2 faces below.

  As shown in FIG. 2, the cap unit 1 of the present embodiment includes a cap body 5 having a first flow path 3 and a second flow path 4, and a check valve mechanism 6 disposed in the first flow path 3. With The first flow path 3 sends the compressed air from the compressor 8 into the bottle container 2. Further, the second flow path 4 sequentially takes out the puncture repair liquid and the compressed air from the bottle container 2 by feeding the compressed air.

  Specifically, the cap body 5 of this example includes a bottle mounting recess 9 for mounting the mouth portion 2A on the upper end of a cylindrical body portion 5A. An inner screw portion for screwing the mouth portion 2A is formed on the inner peripheral surface of the bottle mounting recess 9. A boss portion 10 extending in the bottle container 2 and an annular rib 23 surrounding the boss portion 10 protrude from the bottom surface of the bottle mounting recess 9. The boss 10 and the annular rib 23 in this example are formed concentrically with the bottle mounting recess 9.

  A first connection part 11 for connecting a compressor and a second connection part 12 for connecting a tire project from the side surfaces of the cap body 5. The first connection portion 11 of this example is formed as a connection nozzle that can be directly connected to the compressed air discharge port 8A (shown in FIG. 1) of the compressor 8 without a hose. Further, the second connecting portion 12 of this example is formed as a hose connecting portion that can connect a hose extending from the tire T.

  As shown in FIG. 3, among the first and second flow paths 3 and 4 formed in the cap body 5, the first flow path 3 has a vertical flow path portion 15 and a horizontal flow path portion 16. The longitudinal flow path portion 15 extends downward from the upper opening 3U that opens at the upper end of the boss portion 10. The horizontal flow path portion 16 extends substantially horizontally from the lower opening 3L (shown in FIG. 2) that opens at the tip of the first connection portion 11 and intersects the lower end of the vertical flow path portion 15 in an L shape.

The longitudinal flow path portion 15 of the first flow path 3 is provided with a valve seat portion 20 and a valve accommodating region Y disposed on the upper side thereof. In this embodiment, the lower region portion Y _L valve housing zone Y, when forming the stepped shape having slightly the diameter of the upper region portion Y _U than shown. The valve seat portion 20 has a cone-shaped valve seat surface 20s whose diameter is reduced downward.

  The second flow path 4 has a vertical flow path portion 17 and a horizontal flow path portion 18. The longitudinal channel portion 17 extends downward from the upper opening 4U that opens between the boss portion 10 and the annular rib 23 and at the bottom surface of the bottle mounting recess 9. The horizontal flow path portion 18 extends substantially horizontally from a lower opening 4L (shown in FIG. 2) that opens at the tip of the second connection portion 12 and intersects the lower end of the vertical flow path portion 17 in an L shape.

  A check valve mechanism 6 that prevents the back flow of the puncture repair liquid from the bottle container 2 is disposed in the first flow path 3.

  The check valve mechanism 6 includes a ball valve 30, a cover plate 31, and a connecting portion 32.

The ball valve 30 is disposed in the valve housing area Y. The ball valve 30 is loosely inserted in the valve accommodating region Y so as to be movable up and down, and can sink due to its own weight to close the valve seat portion 20. In the present example, since the valve housing zone Y is comprises a lower region portion Y _L, suppressing the positional deviation in the radial direction of the ball valve 30 of the closed state. Note the lower region portion Y _L and the upper region portion Y _U may be the same diameter.

  The cover plate 31 has a disk shape, and closes the upper opening 3U by contacting the upper surface of the upper opening 3U. The connecting portion 32 connects the ball valve 30 and the cover plate 31 so as to be movable up and down simultaneously.

  The connecting portion 32 has a rigid shaft shape and can push up the cover plate 31 with respect to the upward movement of the ball valve 30, for example. That is, the ball valve 30 and the cover plate 31 can move up and down together.

  The ball valve 30 may be a synthetic resin material such as polypropylene (PP) or polyamide (PA), and a metal material such as zinc alloy or stainless alloy as long as it has a specific gravity greater than that of the puncture repair liquid. It can be adopted as appropriate. In particular, a stainless alloy can be preferably employed because of its strong oxidative deterioration (such as rust) over time.

  Further, as the cover plate 31, as long as it has a specific gravity larger than that of the puncture repair liquid, a synthetic resin material such as polypropylene (PP) or polyamide (PA), and a metal material such as zinc alloy or stainless alloy, for example. Can be adopted as appropriate. In particular, polypropylene (PP) can be preferably employed because the material cost is relatively low.

  In addition, as the connection part 32, a synthetic resin material and a metal material can be used. The connecting portion 32 is connected to at least one of the ball valve 30 and the cover plate 31 by bonding. Bonding includes welding using an adhesive, welding of resin materials, welding of metals. As an example, for example, when the ball valve 30 and the connecting portion 32 are metal and the cover plate 31 is a synthetic resin, the ball valve 30 and the connecting portion 32 are connected by welding, and the connecting portion 32 and the cover plate 31 are bonded with an adhesive or It can connect by welding of resin. For example, when the ball valve 30 is a metal and the cover plate 31 and the connecting portion 32 are made of synthetic resin, the cover plate 31 and the connecting portion 32 are integrally molded without bonding, and the connecting portion 32 and the ball valve 30 are bonded with an adhesive. Or it can connect by welding of resin.

As shown in FIG. 5 (B), the diameter D1 of the ball valve 30 is preferably 0.7 times or more the inner diameter Di of the valve accommodating region Y. When the valve housing area Y has a stepped shape as in this example, the inner diameter of the large-diameter side area (upper area Y _{U in} this example) is adopted as the inner diameter Di. In the case of D1 <0.7 × Di, the movement of the ball valve 30 in the valve accommodating region Y becomes large, the impact sound with the wall surface becomes strong, and the quietness in the storage state is impaired. From such a viewpoint, the lower limit value of the diameter D1 is preferably 0.75 times or more the inner diameter Di. The upper limit of the diameter D1 is at least smaller than the inner diameter Di, but is preferably not more than 0.9 times the inner diameter Di in order to smoothly move up and down.

  The outer diameter D2 of the lid plate 31 is preferably 1.5 times or less of the inner diameter Di. In the case of D2> 1.5 × Di, the cover plate 31 may protrude from the outer periphery of the boss portion 10, and in this case, the degree of freedom in designing the inner cap 33 described later is impaired. From such a viewpoint, the upper limit of the outer diameter D2 is preferably equal to or smaller than the outer diameter Do of the boss portion 10. The lower limit of the outer diameter D2 is at least larger than the inner diameter Di, but is preferably 1.1 times or more the inner diameter Di in order to close the upper opening 3U.

  Next, as shown in FIG. 3, in the cap unit 1, the inner cap 33 is detachably fitted to the annular rib 23. The inner cap 33 of this example includes a large-diameter lower cylindrical portion 34, a small-diameter upper cylindrical portion 35, a tapered joint 36 connecting the lower cylindrical portion 34 and the upper cylindrical portion 35, and the upper end of the upper cylindrical portion 35. It has a closed conical head 37.

  The lower cylindrical portion 34 is fitted to the outer peripheral surface of the annular rib 23. The upper cylindrical portion 35 is fitted to the outer peripheral surface of the boss portion 10.

  As shown in FIG. 4B, in the cap unit 1 of this example, when the compressed air flows from the compressor 8 into the first flow path 3, the ball valve 30 is pushed up by the compressed air, and the valve seat portion 20 is opened. To do. Along with this, the cover plate 31 is pushed up by the push-up through the connecting portion 32 from the ball valve 30 and the compressed air that has passed through the valve seat portion 20. Then, the cover plate 31 pushes up the inner cap 33 while colliding with the inner cap 33, thereby fitting the lower cylindrical portion 34 and the annular rib 23 and fitting the upper cylindrical portion 35 and the boss portion 10. Is removed and the inner cap 33 is removed.

  On the other hand, when there is no cover plate 31, as shown to FIG. 4 (A), the inner cap 33 is pushed up only by the internal pressure by compressed air. That is, there is a problem that the inner cap 33 is difficult to come off because the force due to the collision of the lid plate 31 does not act.

  That is, by providing the cover plate 31, it is possible to obtain an effect that the inner cap 33 is easily detached. This effect is useful for preventing the inner cap 33 from becoming hard and difficult to come off, particularly when performing puncture repair in an environment of extremely low temperature (for example, minus 30 ° C. or less).

  Further, as shown in FIGS. 5A and 5B, when the tire T is connected to the second flow path 4 of the cap unit 1 without accidentally or completely removing the air from the tire T, the tire T The residual compressed air inside flows into the second flow path 4 and the inner cap 33 may come off. At this time, as shown in FIG. 5A, when there is no cover plate 31, the puncture repair liquid in the bottle container 2 flows into the first flow path 3 from the upper opening 3U. Although the first flow path 3 is closed by the ball valve 30, it is due to the weight of the ball valve 30. Therefore, there is a possibility that the ball valve 30 moves due to the flow or vibration of the puncture repair liquid and a gap is generated. is there. And there remains a risk that the puncture repair liquid flows backward to the compressor 8 from the gap.

  On the other hand, as shown in FIG. 5B, when the cover plate 31 is provided, inflow of the puncture repair liquid can be prevented at the position of the upper opening 3U in addition to the position of the valve seat portion 20. . In other words, by providing the cover plate 31, it is possible to more reliably prevent the puncture repair liquid from flowing back into the first flow path 3 even when the inner cap 33 is removed due to an erroneous operation or the like. Can do.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

  In order to confirm the effect of the present invention, an example having the structure shown in FIG. 2 and having a check valve mechanism in which a ball valve and a cover plate are connected by a connecting portion was manufactured. For comparison, a comparative example having a check valve mechanism consisting only of a ball valve was also prototyped. The embodiment and the comparative example differ only in the check valve mechanism.

  And after storing the cap unit with a bottle container in a cryogenic environment (-40 degreeC) for 24 hours, it connected to the compressor immediately and confirmed the removal state of the inner cap. As a result, it was confirmed that the example was more reliably removed than the comparative example.

  In addition, when residual compressed air (200 kPa) in the tire flows into the second flow path of the cap unit and the inner cap is removed, test how the puncture repair liquid flows back into the first flow path. did.

  In the normal state, in the comparative example, it was confirmed that the backflow was prevented at the position of the valve seat, and in the example, the backflow was prevented at the position of the upper opening. Therefore, when the residual compressed air in the tire was introduced while giving vibration (frequency: 10 Hz, amplitude: 16 mm) to the comparative example and the example, in the comparative example, there was a case where a reverse flow was caused beyond the valve seat portion. However, in the example, it was confirmed that the backflow was prevented at the upper opening or the valve seat.

DESCRIPTION OF SYMBOLS 1 Cap unit 2 Bottle container 2A Mouth part 3 1st flow path 3U Upper opening part 4 2nd flow path 5 Cap main body 6 Check valve mechanism 8 Compressor 15 Longitudinal flow path part 20 Valve seat part 30 Ball valve 31 Cover plate 32 Connection Part Y Valve storage area

Claims (6)

A first flow path for taking in the compressed air from the compressor into the bottle container, and a puncture repair liquid and compressed air from the bottle container by taking in the compressed air. A cap body having a second flow path for sequentially taking out
And a check valve mechanism arranged in the first flow path for preventing the back flow of the puncture repair liquid from the bottle container,
In the reference posture in which the mouth portion of the bottle container faces downward, the first flow path is formed in a vertical flow path section that extends downward from an upper opening that opens in the bottle container, and the vertical flow path section. And the check valve mechanism is disposed on a valve accommodating region between the upper opening and the valve seat, and is disposed on the upper opening. A cap unit for puncture repair, comprising a cover plate for closing the upper opening, and a connecting portion for connecting the ball valve and the cover plate so as to be movable up and down simultaneously.   The cap unit for puncture repair according to claim 1, wherein the connecting portion has a shaft shape and is bonded to at least one of the ball valve and the cover plate.   The cap unit for puncture repair according to claim 1 or 2, wherein a diameter D1 of the ball valve is 0.7 times or more an inner diameter Di of the valve housing region.   The cap unit for puncture repair according to any one of claims 1 to 3, wherein an outer diameter D2 of the cover plate is 1.5 times or less of an inner diameter Di of the valve housing region.   The cap unit for puncture repair according to any one of claims 1 to 3, wherein the ball valve is made of a metal material.   The cap unit for puncture repair according to any one of claims 1 to 3, wherein the lid plate is made of a synthetic resin material.

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