JP2011185434A - Valve connection fitting and tire repairing kit using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent spout of a flat tire sealant from a valve connection fitting due to wrong operation without impairing operability. <P>SOLUTION: A valve means having a valve element moved backward by pressure of a valve core to open a duct is provided in a connection fitting body having the duct connecting between a hose connecting part and a valve connecting part. The valve element is integrally provided with: a valve part capable of blocking up a center hole of a valve seat ring; a valve core pressing shaft part projecting forward from the valve part through the center hole; and an abutting part having an abutting surface projecting backward from the valve part and also abutting on a stopper part provided in the duct to limit backward movement of the valve part. The abutting surface is formed by a tapered cone face, and the stopper part is formed by at least three projecting parts projecting from the inner peripheral surface of the duct. The projecting ends of the projecting parts are provided with centering surfaces having the same inclination as the cone face. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is used to connect a supply hose and a tire valve, and injects a puncture sealing agent and compressed air into a punctured pneumatic tire in order to repair the puncture quickly, and uses the same. Related to the puncture repair kit.

  For example, as shown in FIG. 18A, the tire T and the compressor c are connected to the sealing agent container a using hoses d1 and d2 as a puncture repair device for repairing a punctured tire as an emergency. By sending the compressed air from the compressor c into the sealing agent container a, the sealing agent in the sealing agent container a is pumped into the tire T, and then the tire T is automatically pumped up by the compressed air that continues to flow. What is made to suggest is proposed (for example, refer patent document 1). The hose d2 for feeding the sealing agent used in such a puncture repair device is provided with a valve connection fitting f that can be connected to the tire valve V at the front end thereof.

  However, in the puncture repair device, the compressor c may be erroneously operated before the valve connection fitting f is connected to the tire valve V during the puncture repair. At this time, in the case of the conventional valve connection fitting f, there arises a problem that the puncture sealing agent is ejected from the tip thereof and the surroundings are soiled.

  In Patent Document 2 below, as shown in FIG. 18 (B), the valve connection of the connection fitting main body h provided with a valve connection portion g connectable to the tire valve V on the distal end side as the valve connection fitting f. Proposals have been made in which a closing cap i is attached to the part g. However, this is inconvenient because it is necessary to remove the closing cap i when connecting to the tire valve V, and further improvement is desired.

Japanese Patent Laid-Open No. 2001-212883 JP 2009-291952 A

  Accordingly, the present invention provides a valve body that opens a conduction path by connection to a tire valve in the connection fitting body, and has a stopper portion having a centering surface that holds the valve body concentrically with the conduction path when the valve is opened. Protruding from the inner peripheral surface, it is possible to reliably prevent the puncture sealant from being ejected from the valve fitting due to incorrect operation without impairing operability, and guide the valve body when the valve is opened. To provide a valve connection fitting that can be held concentrically with a passage, stabilizes the flow of a puncture sealant in a conduction path, and suppresses flow resistance and fluctuation thereof, and a puncture repair kit using the same. It is an object.

In order to solve the above-mentioned problems, the invention of claim 1 of the present application provides a hose connection portion on the rear end side that can be connected to a feeding hose that feeds the puncture sealing agent, and a valve connection portion on the front end side that can be connected to a tire valve. And a fitting body having a conduction path that conducts between the hose connection part and the valve connection part,
And a valve connection fitting provided inside the connection fitting main body and having valve means having a valve body that retreats by pressing from the valve core accompanying connection to the tire valve and opens the conduction path. ,
The valve means includes
An annular valve seat ring having a central hole that forms part of the conduction path;
A valve portion that can contact the rear surface of the valve seat ring to close the central hole, and a valve core pusher that protrudes forward from the valve portion through the central hole and that is pressed from the valve core to retract the valve portion. A valve that integrally includes a shaft portion and a contact portion that protrudes rearward from the valve portion and contacts a stopper portion provided in the conduction path and has a contact surface that restricts retreat of the valve portion at a rear end portion body,
And a biasing spring that biases the valve portion forward to abut against the valve seat ring,
The abutment surface is composed of a cone surface that is tapered toward the rear,
In addition, the stopper portion protrudes from the inner peripheral surface of the conduction path and is spaced apart in the circumferential direction, and the protruding end receives the cone surface by making the same inclination as the cone surface, and the contact is made. It is characterized by comprising at least three protrusions having a centering surface for holding the part concentrically with the conduction path.

  According to a second aspect of the present invention, the valve core pushing shaft portion includes a base shaft portion that passes through the center hole, a rib shape that protrudes from the outer peripheral surface of the base shaft portion and extends in the axial direction, and an inner peripheral surface of the center hole. And at least three core misalignment prevention ribs that suppress core misalignment with respect to the center hole of the valve core push shaft portion.

  According to a third aspect of the present invention, the valve seat ring is made of a rubber-like elastic body and can be compressed and deformed.

According to a fourth aspect of the present invention, the connection fitting main body includes a hose connection cylinder having the hose connection portion, and a valve connection cylinder having the valve connection portion and rotatably inserted in the hose connection cylinder. And
The outer peripheral surface of the valve seat ring is fitted into the inner hole of the hose connection cylinder and the front end portion thereof, and is kept airtight.

  The invention according to claim 5 is characterized in that the outer peripheral surface of the valve seat ring and the inner peripheral surface of the valve connecting cylinder are not in contact with each other.

  According to a sixth aspect of the present invention, the hose connection cylinder is formed with a peripheral groove on its outer peripheral surface for accommodating an O-ring for sealing between the inner peripheral surface of the valve connection cylinder and the O-ring. The cross-sectional thickness is set to be larger than the groove depth of the circumferential groove and equal to or less than the gap between the groove bottom of the circumferential groove and the inner peripheral surface of the valve connecting cylinder.

The invention of claim 7 includes a compressor device having a compressed air discharge port for discharging compressed air,
A puncture repair kit comprising a bottle unit with a cap attached to the mouth of a bottle container containing a puncture sealant,
The cap of the bottle unit is connectable to the compressed air discharge port portion, and a connection nozzle that feeds compressed air from the compressed air discharge port portion into the bottle container by connection,
A feeding hose having a rear end connected to a sealing agent / compressed air outlet port for sequentially taking out the puncture sealing agent and compressed air from the bottle container by feeding the compressed air, and a front end of the feeding hose The valve connection fitting according to any one of claims 1 to 6 is connected to the portion.

  As described above, the present invention includes valve means inside the connection fitting body. The valve means has a valve body that opens the conduction path by pressing from the valve core accompanying connection to the tire valve. Therefore, an extra operation such as removal of the closing cap is unnecessary, and the operability is not impaired, and the puncture sealing agent can be reliably prevented from being ejected from the valve connection fitting.

  The valve body has a contact surface at its rear end portion that contacts the stopper portion when the valve is opened, and this contact surface is a cone surface that tapers toward the rear. In addition, the stopper portion includes at least three protruding portions protruding from the inner peripheral surface of the conduction path and spaced apart in the circumferential direction, and the protruding end of each protruding portion is used as a centering surface having the same inclination as the cone surface. Yes.

  As described above, since the stopper portion is formed by the protruding portion protruding from the inner peripheral surface of the conduction path, the puncture sealing agent can flow forward through the protruding portion when the valve is opened. In addition, since the rear end of the valve body is held concentrically with the conduction path by the centering surface of the stopper, the gap formed between the valve body and the inner peripheral surface of the conduction path is uniform and stabilized in the circumferential direction. To do. Therefore, the flow of the puncture sealing agent when the valve is opened can be stabilized, and the flow resistance itself and fluctuations in the flow resistance can be suppressed low.

  Further, in the case of the closing cap, the puncture sealing agent can be prevented from being ejected due to an erroneous operation, but at that time, the high-pressure puncture sealing agent is confined in the feeding hose. Therefore, if an operation error occurs once, for example, the compressor is stopped, and after that, even if you try to remove the closing cap and connect the valve fitting to the tire valve, the puncture sealing agent will spout when the closing cap is removed. Therefore, connection to the tire valve becomes difficult. That is, there is a problem that once a mistake is made, puncture repair cannot be performed.

  However, in the case of the valve means, the valve is opened in a state where the valve fitting and the tire valve are screwed to some extent. Therefore, even if an erroneous operation is performed once, the valve fitting can be connected to the tire valve without discharging the high-pressure puncture sealing agent confined in the feeding hose. In other words, even if it is erroneously operated once, it can be reconnected to the tire valve to perform puncture repair.

It is a perspective view which shows the use condition of the puncture repair kit using the valve | bulb connection metal fitting of this invention. It is a perspective view which shows a compressor apparatus. It is sectional drawing which shows the internal structure of a compressor apparatus. It is a disassembled perspective view which shows a compressor main body. It is a fragmentary sectional view which shows the principal part. It is sectional drawing which shows the state before joining of a compressed air discharge part and a connection nozzle. It is sectional drawing which shows the joining state of a compressed air discharge outlet part and a connection nozzle. It is sectional drawing which shows a cap with a bottle container. (A), (B) is a fragmentary sectional view explaining the function of an auxiliary | assistant removal means. It is sectional drawing which shows a valve connection metal fitting. It is a disassembled perspective view which shows the principal part. It is sectional drawing explaining the misalignment prevention function by a valve core pushing shaft part. (A), (B) is sectional drawing which shows the valve closed state and full open state in a valve connection metal fitting. It is sectional drawing which shows the general structure of a tire valve. It is a fragmentary sectional view which expands and shows the other example of a valve connection metal fitting. It is sectional drawing which expands and shows the attachment state of an O-ring. It is a fragmentary sectional view showing other examples of a valve connection metal fitting. (A) is a perspective view which shows an example of a puncture repair apparatus, (B) is sectional drawing which shows the conventional valve | bulb connection metal fitting.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a perspective view showing a use state of a puncture repair kit 1 using a valve connection fitting 5 according to the present invention. This puncture repair kit 1 is a compressor having a compressed air discharge port 8 for discharging compressed air. The apparatus 2 includes a bottle unit 3 in which a cap 6 is attached to a mouth portion 4A of a bottle container 4 containing a puncture sealing agent.

  In this example, the compressor device 2 includes a cylinder 12 that forms a pump chamber 11 between a motor M and a piston 10 connected to the motor M, as shown in FIGS. The compressor main body 13 having at least is housed. The storage case 9 is formed in a flat and substantially rectangular parallelepiped box shape with a small height, and in this example, the storage case 9 is formed so as to be divided into upper and lower case portions.

  As the motor M, various commercially available DC motors that operate with a 12V DC power source of an automobile can be used. A power cord provided with a power plug 15 that can be connected to a cigar socket 18 of an automobile is connected to the motor M via a power switch 16 of the compressor device 2. In this example, the power switch 16 is arranged on the upper surface of the storage case 9 and the power plug 15 can be taken out into a recess (not shown) provided on the side surface or the bottom surface of the storage case 9. Stored.

  Next, as shown in FIGS. 4 and 5, the compressor body 13 includes a piston 10 connected to the motor M via a crank mechanism 17, and accommodates the piston 10 so as to be capable of reciprocating. And a cylinder 12 forming a pump chamber 11 therebetween. The piston 10 has an intake hole 19A extending through the piston 10 in the axial direction, and the intake hole 19A is closed from the pump chamber side with a spring property, such as an elastic material such as rubber, synthetic resin, or metal. An intake valve 19 using a valve 19B such as a body is formed.

  In the present example, the cylinder 12 is a surge tank that stores compressed air from the pump chamber 11 at the rear end side of the cylindrical cylinder body 20 forming the pump chamber 11 and suppresses pressure pulsation by the piston 10. A cylinder sub-portion 21 for forming the chamber 21A is integrally provided. In this example, the surge tank chamber 21A is electrically connected to the pump chamber 11 through a small hole 20A1 formed in the partition wall 20A that closes the rear end of the cylinder body 20.

  A compressed air discharge port 8 for discharging compressed air projects from the peripheral wall of the cylinder sub-part 21. In this example, a first connecting part 24A for attaching the pressure gauge 22 and a second connecting part 24B for attaching the relief valve 23 are provided in the peripheral wall of the cylinder sub-part 21 in different directions. Is done.

  As shown in FIG. 6, the compressed air discharge port portion 8 has a cylindrical shape protruding from the cylinder sub-portion 21, and a discharge passage 26 extending from the surge tank chamber 21 </ b> A is formed therein. In addition, the inner hole of the compressed air discharge port portion 8 is provided with tapered surface portions 8B and 8C that form a tapered cone toward the cylinder sub-portion 21 before and after the parallel hole portion 8A having a constant inner diameter.

  Next, the bottle unit 3 includes a bottle container 4 containing a puncture sealing agent and a cap 6 attached to the opening 4A. The bottle unit 3 is placed in the compressor device 2 in an inverted state with the cap 6 directed downward. Connected directly.

  The cap 6 is connectable to the compressed air discharge port 8 and is connected to a connection nozzle 41 that feeds compressed air from the compressed air discharge port 8 into the bottle container 4. 4 includes a cap body 29 having a sealing agent / compressed air outlet 7 for sequentially taking out the puncture sealing agent and compressed air from 4, and a feed hose 28 connected to the sealing agent / compressed air outlet 7. Yeah. In this example, the case where the connection nozzle 41 is fitted and directly connected to the compressed air discharge port portion 8 is exemplified. For example, the compressed air discharge port portion 8 is also formed in a nozzle shape, and the compressed air discharge port portion 8 is formed. And the connection nozzle 41 can be configured to be connected by a hose.

  As shown in FIG. 8, the cap body 29 of this example includes a bottom plate portion 31 forming a bottom surface, a mouth portion attaching portion 32 to which the mouth portion 4A of the bottle container 4 is attached, and a constricted portion 33 disposed therebetween. Provide one. Further, in the cap body 29, an air flow path 35 leading from the connection nozzle 41 to the mouth portion 4 </ b> A of the bottle container 4, and a sealing agent / compressed air outlet port portion 7 to the mouth portion 4 </ b> A of the bottle container 4. A extending sealing agent / compressed air outlet passage 36 is formed.

  The mouth mounting portion 32 has a mounting recess 32A for fixing the mouth 4A, and a boss portion 32B protruding from the bottom surface of the mounting recess 32A. The mounting recess 32A can be screwed into the mouth portion 4A with an internal screw provided on the inner wall surface thereof. Further, on the upper surface of the boss portion 32B, an air flow path upper opening 35a which is the upper end of the air flow path 35 and a sealing agent / compressed air take-off flow path upper opening 36a which is the upper end of the sealing agent / compressed air take-out flow path 36a. And open respectively.

  The air flow path 35 includes a vertical flow path portion 35A extending downward from the air flow path upper opening 35a, and an air flow path that is bent at the lower end of the vertical flow path portion 35A and opened at the tip of the connection nozzle 41. An L-shape is formed which includes a horizontal flow path portion 35B extending to the lower opening 35b. In this example, a one-way valve 39 for preventing the puncture sealing agent from flowing backward from the air flow path upper opening 35a is formed in the vertical flow path portion 35A.

  The sealing agent / compressed air take-out flow path 36 is bent at the vertical flow path portion 36A extending downward from the sealing agent / compressed air take-out flow path upper opening 36a, and the lower end of the vertical flow path portion 36A and is sealed. It forms an L-shape consisting of a horizontal flow path portion 36B extending to the lower end opening 36b of the sealing agent / compressed air discharge flow path that opens at the tip of the agent / compressed air discharge opening 7. In this example, the vertical flow path portion 36A is formed as a central hole passing through the center of the boss portion 32B.

  The cap body 29 is provided with an inner lid 34. As shown in FIGS. 9 (A) and 9 (B), the inner lid 34 includes a cup-shaped inner lid main body 34A that is fitted to the outer peripheral surface of the boss portion 32B, and an upper portion of the inner lid main body 34A. A plug portion 34B that protrudes downward from the plate portion and is inserted into the sealing agent / compressed air outlet passage upper opening 36a and closes the sealing agent / compressed air outlet passage opening 36a.

  During storage, the inner lid 34 closes the air flow path upper opening 35 a and the sealing agent / compressed air take-out flow path upper opening 36 a so that the puncture sealant can be confined in the bottle container 4. Further, at the time of puncture repair, the boss portion 32B is automatically removed by the pressure of the compressed air flowing into the inner lid body 34A from the air flow path 35.

  Reference numeral 50 in the figure denotes auxiliary removal means for manually removing the inner lid 34 when the inner lid 34 cannot be removed by the pressure of the compressed air. The auxiliary removing means 50 is continuous with the lower end Q of the vertical flow path portion 36A, and extends in a straight line with the vertical flow path portion 36A up to the lower opening 51a that opens on the bottom surface side of the cap body 29. The extension channel portion 51 includes a push shaft 52 that is slidably held up and down in the extension channel portion 51 and that can push the plug portion 34B upward by sliding upward. .

  The push shaft 52 includes an insertion portion 52A that is airtightly arranged in the extension flow path portion 51 via an O-ring, and a protrusion portion 52B that continues to the insertion portion 52A and protrudes downward from the lower opening 51a. With The push shaft 52 has a lower position YL whose upper end is lower than the lower end Q of the vertical flow path portion 36B, and a raised position YU where the lower end of the plug portion 34B is pushed upward to remove the inner lid 34. Can move between. A lever 52C that pushes the push shaft 52 upward by manual operation is disposed at the lower end portion of the push shaft 52, and the bottom plate portion 31 of the cap body 29 has a lower end of the push shaft 52 at the lowered position YL. A stopper 31A is formed in contact with the portion. The protruding portion 52B is provided with spring means 53 that urges the push shaft 52 downward to return it to the lowered position YL.

  Next, the connection nozzle 41 protrudes from the constricted portion 33 toward the compressed air discharge port 8 and is directly connected by fitting into the compressed air discharge port 8.

  As shown in FIGS. 6 and 7, the connection nozzle 41 has a tapered cone-shaped tapered surface portion 41B on the distal end side of the parallel nozzle body 41A, and the compressed air discharge port on the outer periphery of the nozzle body 41A. An O-ring 43 that seals between the inner peripheral surface of the portion 8 is attached. In this example, the O-ring 43, which is a consumable item, is disposed on the cap body 29 side, so that the compressor device 2 can be used repeatedly without maintenance.

  The rear tapered surface portion 8C in the compressed air discharge port portion 8 has substantially the same inclination as the tapered surface portion 41B. When the connecting nozzle 41 is inserted into the compressed air discharge port portion 8, the tapered surface portion 41B is formed. It functions as a receiving surface that receives and concentrically holds it.

  The cap body 29 is provided with a pair of locking claws 45 on both sides of the connection nozzle 41 (upper and lower sides in this example), and the compressor device 2 is opposed to the locking claws 45. In addition, a claw engagement hole 46 is formed for engaging the locking claw 45 to fix the compressor device and the bottle unit 3 in the directly connected state.

  The locking claw 45 has a right-angled triangular hook portion 45B protruding outward from the tip of a main portion 45A extending from the cap body 29 in parallel with the connection nozzle 41. The claw engaging hole 46 has a rectangular hole shape in the present example in which the locking claw 45 is inserted, and is engaged with the hook portion 45B at its upper and lower edges to be prevented from coming off. The locking claw 45 and the cap body 29 are formed as an integrally molded body made of plastic such as nylon, polypropylene, or polyethylene, or reinforced plastic in which short fibers such as glass fiber are blended. Further, in this example, the claw engagement hole 46 is formed by a frame frame 47 supported by the compressed air discharge port portion 8, and the frame frame 47, the compressed air discharge port portion 8, the cylinder 12, and the like. Is formed as an integral molded body made of a lightweight alloy such as a zinc alloy or an aluminum alloy.

  Next, the feed hose 28 is connected at its rear end to the sealing agent / compressed air outlet 7 and, at the front end of the feed hose 28, as shown in FIG. The metal fitting 5 is connected.

  The valve connector 5 includes a hose connecting portion 56 on the rear end side that can be connected to the feeding hose 28, a valve connecting portion 57 on the front end side that can be connected to the tire valve V, and the hose connecting portion 56 and the valve connecting portion. A connection fitting main body 59 having a conduction path 58 that conducts between the connection fitting 57 and valve means 60 provided inside the connection fitting main body 59.

  Specifically, the connection fitting main body 59 includes a hose connection tube 61 having a hose connection portion 56 and a valve connection tube 62 having a valve connection portion 57 and rotatably inserted in the hose connection tube 61. Have.

  The hose connection cylinder 61 has a stepped cylinder shape having an inner hole 61H, and in this example, the feeding hose 28 can be connected to the rear end side of the large-diameter cylinder body 61a by, for example, bamboo shoots. A hose connection portion 56 is formed. The inner hole 61H includes a small-diameter hole 61Ha that passes through the hose connection part 56, a large-diameter hole 61Hb that passes through the cylinder body 61a, and an inclined surface 61Hc that connects between the inner hole 61H and the cylindrical body 61a. It is formed.

  The valve connection cylinder 62 has a straight cylinder shape with, for example, a knurled outer peripheral surface. The valve connection cylinder 62 has an internal thread portion to which the tire valve V can be connected to the front end of the inner hole 62H by screwing. A portion 57 is formed. In this example, the valve connecting portion 57 is formed by inserting a ring body 57a having the inner screw portion into the valve connecting cylinder 62 from the rear end side. Further, the inner hole 62H is formed with a holding surface 62Ha on the rear end side of the valve connecting portion 57 via the step surface D for rotatably holding the cylindrical portion main body 61a. A peripheral groove 64 for receiving an O-ring 63 that seals with the holding surface 62Ha is provided on the outer peripheral surface of the cylindrical portion main body 61a. Further, the hose connection cylinder 61 is prevented from coming off by a stop ring 65 fixed to the rear end portion of the inner hole 62H.

  Next, the valve means 60 can close the center hole 66H by contacting an annular valve seat ring 66 having a center hole 66H forming a part of the conduction path 58 and a rear surface of the valve seat ring 66. A valve body 68 having a valve portion 67 and a biasing spring 69 that biases the valve portion 67 forward to abut against the valve seat ring 66 are provided.

  The valve seat ring 66 is made of a rubber-like elastic body that is compressible and deformable in this example, and is sandwiched between the step surface D and the front end of the hose connection cylinder 61. In this example, the conduction path 58 is formed by the center hole 66H and the inner hole 61H.

  The valve body 68 is, for example, a disc-shaped valve portion 67 capable of closing the center hole 66H, and protrudes forward from the valve portion 67 through the center hole 66H and is connected to the tire valve V in connection with the valve core. A valve core pushing shaft portion 70 that retreats the valve portion 67 by pressing from Vc and a stopper portion 71 that protrudes rearward from the valve portion 67 and is provided in the conduction path 58 to limit the retreat of the valve portion 67. A contact portion 72 having a contact surface 72S at the rear end is integrally provided.

  The valve core pushing shaft portion 70 is formed of a straight shaft-shaped base shaft portion 70a passing through the center hole 66H and at least three core misalignment prevention ribs 70b protruding from the outer peripheral surface of the base shaft portion 70a and extending in the axial direction. Is done. As shown in FIG. 12, the core misalignment prevention rib 70b is close to the inner peripheral surface of the center hole 66H, thereby ensuring the necessary flow passage area and the core with respect to the center hole 66H of the valve core push shaft portion 70. Misalignment can be suppressed. From the viewpoint of securing the flow path area, it is preferable that the misalignment prevention rib 70b is three. Further, the difference (D2-D1) between the outer diameter D1 of the misalignment prevention rib 70b and the inner diameter D2 of the center hole 66H is the outer diameter D3 (shown in FIG. 11) of the valve portion 67 and the inner diameter of the large diameter hole portion 61Hb. It is set smaller than the difference from D4 (D4-D3).

  Further, in the valve closed state Y1 in which the valve portion 67 contacts the valve seat ring 66, the front end of the valve core pushing shaft portion 70 is located behind the front end of the valve connecting portion 57, and the distance L between the front ends is as follows. It is preferable to secure 2 mm or more. As shown in FIG. 13A, this means that the valve connection fitting 5 and the tire valve V are screwed together by a distance L until the valve body 68 is operated, that is, until the valve starts to open. means. As a result, even if the compressor device 2 is erroneously operated before the connection of the valve connection fitting 5, the valve connection fitting 5 is somewhat affected before the high-pressure puncture sealing agent confined in the supply hose 28 is discharged. And the tire valve V can be connected. In other words, even if an erroneous operation is performed once, the puncture repair can be performed by reconnecting the valve fitting 5 without causing the puncture sealing agent to scatter. As shown in the general structure of the tire valve V in FIG. 14, the protrusion distance δ from the tip of the tire valve V at the tip of the valve core Vc varies in a range of approximately +0.25 to −0.90 mm. By setting the above to the above range, the above-described valve fitting 5 can be reconnected. In addition,-(minus) display of protrusion distance (delta) means that the valve core Vc front-end | tip is falling rather than the tire valve | bulb V front-end | tip. In the tire valve V, as is well known, the valve core Vc is pushed and retracted to open the valve portion V1, and the stroke K1 of the valve core Vc until fully open is about 1.5 mm. In the fully open state Y2 of the valve (shown in FIG. 13B), the valve core push shaft portion 70 projects forward by a distance N from the valve seat ring 66.

  Next, as shown in FIG. 10, the contact portion 72 has a body 72a having a smaller diameter than the valve portion 67 and loosely inserting a biasing spring 69 therearound, and a rear end portion thereof. The contact surface 72S is formed of a cone surface 73 that is inclined in a tapered manner toward the rear. In the valve body 68, the valve portion 67, the valve core pushing shaft portion 70, and the contact portion 72 are formed concentrically.

  Further, the stopper portion 71 abuts against the abutment surface 72S to limit the backward movement of the valve portion 67. That is, in the valve means 60, as shown in FIGS. 13A and 13B, when the tire valve V is screwed in, the valve core Vc first presses the valve core pushing shaft portion 70 to retract the valve body 68. Then, the abutting part 72 comes into contact with the stopper part 71, and the valve is fully opened Y2. The stroke K2 (stroke from the valve closed state Y1 to the fully open state Y2) of the valve body 68 at this time is about 2.0 mm in this example. Thereafter, when the tire valve V is further screwed in, the valve core Vc is pressed and pressed by the valve core pushing shaft portion 70, the valve core Vc is retracted relative to the valve stem, and the valve portion V1 of the tire valve V is opened. Thus, the puncture sealing agent can flow into the tire (hereinafter, this state is referred to as a tire valve open state Y3).

  As shown in FIGS. 10 and 11, the stopper portion 71 protrudes from the inner peripheral surface of the conducting path 58 (in the present example, the joint surface 61Hc) and is arranged at intervals in the circumferential direction (in this example). Then, the four protrusions 74 are formed. Further, a centering surface 75 that receives the cone surface 73 and holds the contact portion 72 concentrically with the conduction path 58 is formed at the projecting end of each projecting portion 74 by making the same inclination as the cone surface 73. .

  Therefore, in the valve means 60, the puncture sealant flows forward through the gap J1 (shown in FIGS. 11 and 13B) between the protrusions 74 and 74 in the fully open state Y2 of the valve. Can do. Moreover, since the contact portion 72 of the valve body 68 is held concentrically with the conduction path 58 by the centering surface 75, the flow path that is the gap J2 between the valve body 68 and the inner peripheral surface of the conduction path 58 is circumferential. Uniform and stable. Therefore, the flow of the puncture sealant is stabilized, and the flow resistance and its fluctuation can be suppressed low. The protrusion 74 is formed with a recess 74 a that receives the rear end of the biasing spring 69.

Here, the distance N preferably satisfies the following formula (1).
N> K1-δ --- (1)
When the protrusion distance δ varies from +0.25 to −0.90 mm as described above, the distance N is greater than 2.4 mm when the stroke K1 of the valve core Vc is 1.5 mm. As a result, in the tire valve open state Y3 (indicated by a two-dot chain line in FIG. 13B), the tire valve V can be pressed against the valve seat ring 66, and the space between the tire valve V and the puncture sealant is sealed. Leakage can be reliably prevented. For this purpose, it is also necessary that the valve seat ring 66 is made of a rubber-like elastic body that can be compressed and deformed.

  Next, in order to screw the valve connecting fitting 5 to the tire valve V, the valve connecting fitting 62 is pressed against the tire valve V while the valve connecting fitting 62 is connected to the hose connecting fitting 61 and the valve connecting fitting 5. It is necessary to rotate with respect to.

  However, when the valve connection fitting 5 has a structure as shown in FIGS. 10 and 13 (hereinafter sometimes referred to as the first embodiment), the outer peripheral surface of the valve seat ring 66 is the inner peripheral surface of the valve connection cylinder 62. Since the contact area is large and the contact area is large, the resistance during rotation tends to increase and the mounting workability tends to be inferior.

  Therefore, in order to improve this mounting workability, it is preferable to employ the valve connection fitting 5 of the second embodiment described below. As shown in FIG. 15, the valve fitting 5 of the second embodiment holds the outer peripheral surface of the valve seat ring 66 in an airtight manner by pressure-bonding the outer peripheral surface of the valve seat ring 66 to the inner hole 61 </ b> H of the hose connection cylinder 61 and its front end. A valve seat ring holding portion 76 is formed.

  In this example, the inner peripheral surface of the large-diameter hole portion 61Hb of the hose connection cylinder 61 is used as the valve seat ring holding portion 76 as it is.

  The valve seat ring 66 includes a cylindrical valve seat main body 66A whose outer peripheral surface is fitted to the valve seat ring holding portion 76, and a flange-shaped flange portion 66B provided at the front end of the valve seat main body 66A. With. The flange portion 66 </ b> B functions as a stopper that regulates the positional displacement to the rear side by contacting the front end surface of the hose connection cylinder 61. Further, in this example, the outer diameter of the flange 66B is made smaller than the inner diameter of the inner hole 62H of the valve connection cylinder 62, so that the outer peripheral surface of the valve seat ring 66 and the inner diameter of the valve connection cylinder 62 are reduced. The peripheral surface is not contacted.

  Therefore, when the valve connection fitting 5 is screwed to the tire valve V, the resistance during rotation of the valve connection cylinder 62 is greatly reduced, and the mounting workability can be improved. Even when the outer diameter of the flange portion 66B is equal to or larger than the inner diameter of the inner hole 62H of the valve connection tube 62, and the outer peripheral surface of the flange portion 66B is in contact with the inner peripheral surface of the valve connection tube 62, Since the contact area is greatly reduced as compared with the case of the first embodiment, the rotational resistance is small, and the mounting workability can be improved. Non-contact is more preferable.

  In the case of this second embodiment, since the valve seat ring 66 is closely fitted to the hose connection cylinder 61, the compressor device 2 is mistakenly connected before the valve connection fitting 5 is connected to the tire valve V. Even if it has been activated, leakage of the puncture sealing agent can be reliably prevented in the valve closed state Y1. Even in the tire valve open state Y3 in which the valve fitting 5 is connected to the tire valve V, the tip of the tire valve V is pressed against the front end surface of the valve seat ring 66, so that leakage of the puncture sealing agent is prevented.

  Further, when the valve connection fitting 5 is removed from the tire valve V after injecting the puncture sealant and the high-pressure air, or when the valve connection fitting 5 is attached to the tire valve V after the compressor device 2 is erroneously operated, the valve seat Since the front end surface of the ring 66 is in contact with the step surface D, leakage of the puncture sealing agent is prevented. However, for the sake of safety, in this example, a peripheral groove 78 is provided on the outer peripheral surface of the hose connection cylinder 61, and an O-ring 77 that seals between the inner peripheral surface of the valve connection cylinder 62 in the peripheral groove 78. Is housed.

  As shown exaggeratedly in FIG. 16, the O-ring 77 has a cross-sectional diameter D 77 larger than the groove depth H of the peripheral groove 78 and the groove bottom of the peripheral groove 78 and the valve connecting cylinder 62. Or less, the compression ratio of the O-ring 77 is set to 0%. Thereby, an increase in the rotational resistance of the valve connection cylinder 62 due to the O-ring 77 is suppressed.

  FIG. 17 shows another example of the valve fitting 5 of the second embodiment. In this example, as the valve seat ring holding portion 76, a circumferential groove 80 is formed that is recessed in the inner peripheral surface of the large-diameter hole portion 61Hb of the hose connection cylinder 61. The valve seat ring 66 protrudes from the outer peripheral surface of the cylindrical valve seat main body 66A and continuously extends in the circumferential direction, and closes in the circumferential groove 80 (valve seat ring holding portion 76). And a fitting convex portion 66 </ b> C to be fitted into the fitting portion. Also in this case, the outer peripheral surface of the valve seat ring 66 and the inner peripheral surface of the valve connection cylinder 62 are not in contact with each other, and the rotational resistance of the valve connection cylinder 62 can be reduced.

  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.

DESCRIPTION OF SYMBOLS 1 Puncture repair kit 2 Compressor apparatus 3 Bottle unit 4 Bottle container 4A Mouth part 5 Valve connection metal fitting 6 Cap 7 Sealing agent and compressed air outlet part 8 Compressed air discharge part 28 Feed hose 41 Connection nozzle 56 Hose connection part 57 Valve Connecting portion 58 Conducting path 59 Connecting metal fitting body 60 Valve means 61 Hose connecting tube 62 Valve connecting tube 66 Valve seat ring 66H Center hole 67 Valve portion 68 Valve body 69 Energizing spring 70 Valve core push shaft portion 70a Base shaft portion 70b Core misalignment prevention rib 71 Stopper portion 72 Contact portion 72S Contact surface 73 Cone surface 74 Projection portion 75 Centering surface 77O Ring 78 Circumferential groove V Tire valve Vc Valve core

Claims (7)

A hose connection portion on the rear end side that can be connected to a supply hose that feeds the puncture sealant, a valve connection portion on the front end side that can be connected to a tire valve, and the hose connection portion and the valve connection portion are electrically connected. Connection fitting body having a conduction path,
And a valve connection fitting provided inside the connection fitting main body and having valve means having a valve body that retreats by pressing from the valve core accompanying connection to the tire valve and opens the conduction path. ,
The valve means includes
An annular valve seat ring having a central hole that forms part of the conduction path;
A valve portion that can contact the rear surface of the valve seat ring to close the central hole, and a valve core pusher that protrudes forward from the valve portion through the central hole and that is pressed from the valve core to retract the valve portion. A valve that integrally includes a shaft portion and a contact portion that protrudes rearward from the valve portion and contacts a stopper portion provided in the conduction path and has a contact surface that restricts retreat of the valve portion at a rear end portion body,
And a biasing spring that biases the valve portion forward to abut against the valve seat ring,
The abutment surface is composed of a cone surface that is tapered toward the rear,
In addition, the stopper portion protrudes from the inner peripheral surface of the conduction path and is spaced apart in the circumferential direction, and the protruding end receives the cone surface by making the same inclination as the cone surface, and the contact is made. A valve connecting bracket comprising at least three projecting portions having a centering surface for holding the portion concentrically with the conduction path.   The valve core pushing shaft portion has a base shaft portion that passes through the center hole and a rib shape that protrudes from the outer peripheral surface of the base shaft portion and extends in the axial direction, and is close to the inner peripheral surface of the center hole. 2. The valve connecting bracket according to claim 1, further comprising at least three core misalignment prevention ribs for suppressing misalignment with respect to the center hole of the shaft portion.   3. The valve connection fitting according to claim 1, wherein the valve seat ring is made of a rubber-like elastic body and can be compressed and deformed. The connection fitting body includes a hose connection cylinder having the hose connection part, and a valve connection cylinder having the valve connection part and rotatably inserted into the hose connection cylinder,
The valve connection fitting according to any one of claims 1 to 3, wherein an outer peripheral surface of the valve seat ring is fitted into an inner hole of the hose connection cylinder and a front end thereof to be kept airtight.   The valve connection fitting according to claim 4, wherein the outer peripheral surface of the valve seat ring and the inner peripheral surface of the valve connection cylinder are not in contact with each other.   The hose connection cylinder is formed with a peripheral groove on the outer peripheral surface thereof for accommodating an O-ring that seals between the hose connection cylinder and the inner peripheral surface of the valve connection cylinder. The valve connection according to any one of claims 1 to 6, wherein the valve connection is larger than the groove depth of the groove and not more than a gap between a groove bottom of the circumferential groove and an inner peripheral surface of the valve connecting cylinder. Hardware. A compressor device having a compressed air discharge port for discharging compressed air;
A puncture repair kit comprising a bottle unit with a cap attached to the mouth of a bottle container containing a puncture sealant,
The cap of the bottle unit is connectable to the compressed air discharge port portion, and a connection nozzle that feeds compressed air from the compressed air discharge port portion into the bottle container by connection,
A feeding hose having a rear end connected to a sealing agent / compressed air outlet port for sequentially taking out the puncture sealing agent and compressed air from the bottle container by feeding the compressed air, and a front end of the feeding hose A puncture repair kit, wherein the valve connection fitting according to any one of claims 1 to 6 is connected to the portion.

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