JP5941487B2 - Tire puncture repair kit - Google Patents

Description

  The present invention relates to a tire puncture repair kit for repairing a puncture emergency by sequentially injecting a puncture repair liquid and compressed air into a punctured tire.

  As a puncture repair kit that repairs puncture as soon as possible, a kit using a compressor device that generates compressed air and a bottle unit that has an extraction cap attached to the mouth of a bottle container that contains puncture repair liquid has been proposed. (For example, refer to Patent Document 1). In the puncture repair kit, puncture repair liquid is injected from the bottle unit into the tire by compressed air from the compressor device. Thereafter, the pressure of the tire is increased while visually checking the pressure gauge by using the compressed air that is continuously supplied, and the pressure increase is terminated after confirming that the necessary tire pressure has been reached.

  The compressor device is provided with a relief valve for releasing the overpressure when the compressed air exceeds a specified pressure. The specified pressure is normally set to an allowable maximum pressure of the tire, and damage to the tire due to filling with a pressure exceeding the specified pressure is prevented.

  In the above puncture repair kit, when the pressure of the puncture repaired tire is increased to the relief pressure of the relief valve with the compressor device turned on, the actual internal pressure of the tire becomes higher than the pressure displayed on the pressure gauge. There is a tendency that a divergence phenomenon occurs. Therefore, in the said patent document 1, suppressing the said divergence phenomenon is proposed by connecting the chamber which stores compressed air to the surge chamber of a compressor apparatus.

  However, in this case, a relief valve and a chamber are separately required, which greatly hinders downsizing and cost reduction of the compressor device.

JP 2012-101373 A

  The present invention provides a tire puncture repair kit that can achieve pressure regulation of compressed air and suppression of a divergence phenomenon of display pressure without using a relief valve or a chamber, and can reduce the size and cost of a compressor device. The challenge is to do.

The present invention is a puncture repair kit comprising a compressor device and a bottle unit in which an extraction cap is attached to the mouth of a bottle container containing puncture repair liquid,
The extraction cap comprises an intake port for sending compressed air from the compressor device into the bottle container, and an extraction port for sequentially taking out the puncture repair liquid and compressed air from the bottle container by feeding this compressed air,
The compressor device has a main cylinder part that forms a pump chamber for compressing air, and a compressor body having a cylinder that has a sub cylinder part that is connected to the main cylinder part and forms a surge chamber that receives compressed air from the pump chamber,
And a pressure gauge for measuring the pressure of the compressed air in the surge chamber,
The pressure gauge is
A cylindrical body having a conduction hole leading to the surge chamber at the front end, and a cap attached to the rear end;
A piston that has a seal ring that seals between the inner peripheral surface of the cylindrical body and that can move in the longitudinal direction in the cylindrical body by compressed air from the conduction hole;
A spring that is disposed between the piston and the cap, biases the piston toward the front end, and changes in displacement according to the pressure of compressed air;
And the display part which displays the movement amount of the said piston is formed in the surrounding wall of the said cylindrical trunk | drum,
An exhaust port is provided in the peripheral wall of the cylindrical body, and the exhaust port is connected to the conduction hole to exhaust the compressed air when the compressed air reaches a specified pressure and the seal ring exceeds the exhaust port. It is characterized by.

  In the compressor device of the tire puncture repair kit according to the present invention, it is preferable that at least a portion where the display portion is formed is transparent in the cylindrical body portion.

  In the compressor device of the tire puncture repair kit according to the present invention, it is preferable that the seal ring serves as a pointer of the display portion and informs the moving position of the piston by being reflected through the transparent portion.

  In the compressor device of the tire puncture repair kit according to the present invention, the piston preferably includes a cylindrical blindfold covering the spring.

  In the compressor device of the tire puncture repair kit according to the present invention, it is preferable that the cap has a guide portion that guides the piston concentrically.

  In the tire puncture repair kit according to the present invention, the pressure gauge of the compressor device functions as follows. In the pressure gauge, the spring is displaced according to the pressure of the compressed air flowing from the surge chamber into the cylindrical body, and the piston is moved to the rear end side. And since the display unit displays the movement amount of the piston, it can function as a pressure gauge that displays the pressure of compressed air.

  The pressure gauge has an exhaust port on the peripheral wall of the cylindrical body. The exhaust port can exhaust the compressed air when the compressed air reaches a specified pressure and the piston seal ring exceeds the exhaust port. That is, the pressure gauge can also function as a relief valve that can release overpressure from the exhaust port and regulate the compressed air to a specified pressure.

  Moreover, since the pressure gauge itself also functions as a relief valve, there is no time lag between the pressure control of the compressed air and the pressure display. As a result, it is possible to suppress the divergence phenomenon between the actual tire internal pressure and the display pressure without connecting the chamber to the surge chamber. Thus, since it is not necessary to provide a relief valve or a chamber, the number of parts and the accommodation volume can be reduced, which can greatly contribute to downsizing and cost reduction of the compressor device.

It is a perspective view which shows an example of the use condition of the puncture repair kit of the tire of this invention. It is a perspective view which shows one Example of the compressor apparatus used for a puncture repair kit. It is a top view which shows the inside of a compressor apparatus. It is a perspective view which shows the principal part of a compressor main body. It is sectional drawing which shows a cylinder with a piston. It is sectional drawing which shows a pressure gauge. It is a top view which shows a pressure gauge. It is a perspective view which shows the other example of a puncture repair kit.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 shows an example of a use state of a tire puncture repair kit 1 according to the present invention. The puncture repair kit 1 includes a compressor device 2 and a bottle unit 3, and the bottle unit 3 includes a bottle container 41 containing a puncture repair liquid and an extraction cap 42 attached to the mouth of the bottle container 41.

The extraction cap 42 has an intake port portion 42a that feeds compressed air from the compressor device 2 into the bottle container 41, and an extraction port portion that sequentially extracts puncture repair liquid and compressed air from the bottle container 41 by feeding this compressed air. 42b. In this example, the case where the hose 43a and 43b respectively connect between the compressor apparatus 2 and the intake port part 42a, and between the extraction port part 42b and the tire T is illustrated. However, as shown in FIG. 8, the compressor device 2 and the intake port portion 42a may be configured to be directly connectable without using the hose 43a.

  As shown in FIGS. 2 and 3, the compressor device 2 includes at least a compressor body 5 that generates compressed air and a pressure gauge 6 that measures the pressure of the compressed air in a storage case 4.

  The compressor body 5 includes a motor M, a piston 8 connected to the motor M via a crank mechanism 7, and a cylinder 9 that accommodates the piston 8 so as to be capable of reciprocating. As the motor M, various commercially available DC motors that operate with a 12V DC power source of an automobile can be employed. A power cord having a power plug that can be connected to a cigarette lighter socket of an automobile is connected to the motor M via a power switch SW that is attached to the upper plate portion 4A of the storage case 4. As the crank mechanism 7, various known structures can be employed.

  The cylinder 9 includes a main cylinder portion 9A and a sub cylinder portion 9B. As shown in FIG. 5, the main cylinder portion 9 </ b> A accommodates the piston 8 so as to reciprocate from the bottom dead center to the top dead center, and forms a pump chamber 12 </ b> A that compresses air with the piston 8. . The sub cylinder portion 9B is connected to the main cylinder portion 9A, and forms a surge chamber 12B that receives the compressed air compressed in the pump chamber 12A through the one-way valve 13 in this example. This surge chamber 12B suppresses the pulsation of compressed air from the pump chamber 12A and stabilizes the pressure.

  The piston 8 of this example is provided with an intake valve 14 for sucking outside air into the pump chamber 12A. The intake valve 14 has an intake hole 14A extending through the piston 8 in the axial direction, and closes the intake hole 14A with a spring property from the pump chamber 12A side, for example, an elastic material such as rubber, synthetic resin, or metal. It is formed from a valve 14B such as a body.

  The one-way valve 13 includes a connection hole 13A formed in a partition wall portion 9C between the pump chamber 12A and the surge chamber 12B, and a valve body 13B made of, for example, a rubber member that closes the connection hole 13A from the surge chamber 12B side. And a spring 13C that urges the valve body 13B toward the connection hole 13A. The one-way valve 13 is activated by pressurization of the pump chamber 12A and opens the connection hole 13A.

  As shown in FIGS. 3 and 4, connecting cylinder parts 15 and 16 protrude from the sub cylinder part 9B, and a pressure gauge 6 for measuring the pressure of compressed air is connected to one connecting cylinder part 15. . The other connecting cylinder portion 16 forms an air supply path 17 for supplying compressed air to the bottle unit 3 side. In this example, the connection cylinder part 16 is a hose connection part, and the case where it connects with the bottle unit 3 via the said hose 43a is shown.

  As shown in FIGS. 6 and 7, the pressure gauge 6 includes a cylindrical body 18, a piston 19, and a spring 20.

  The said cylindrical trunk | drum 18 has the conduction | electrical_connection hole 21 which leads to the surge chamber 12B in a front-end part, and the cap 22 attaches to a rear-end part. Specifically, the cylindrical body portion 18 of this example includes a cylindrical body portion 18A having a center hole 18A1, and a small-diameter connector portion 18B concentrically connected to the front end of the body portion body 18A via a step. With The conduction hole 21 opens at the front end of the connector portion 18B, and continues from the opening through the connector portion 18B to the central hole 18A1. The connector portion 18B is airtightly connected to the connecting tube portion 15 via a seal ring 23 such as an O-ring that is attached to the outer periphery thereof. The cap 22 is screwed to the rear end portion of the trunk body 18A.

  The piston 19 includes a piston main body 19A made of, for example, synthetic resin that is loosely inserted into the cylindrical body 18, and a seal ring 24 such as an O-ring that is attached to the outer periphery of the piston main body 19A. The space between the inner peripheral surface of the cylindrical body 18 is sealed. The piston 19 can move in the longitudinal direction in the cylindrical body portion 18 by the compressed air from the conduction hole 21.

  The spring 20 is disposed between the piston 19 and the cap 22 and urges the piston 19 to the front end side. The spring 20 of this example is a compression coil spring, and its displacement (in this example, the amount of compression) changes depending on the pressure of the compressed air.

  The cap 22 of this example is provided with a holding cylinder portion 22A that is inserted into the spring 20 and holds the spring 20 concentrically. The holding cylinder portion 22A also functions as a guide portion that guides the piston 19 concentrically. Specifically, the piston 19 of the present example includes a guide shaft portion 19B concentrically extending rearward from the rear end of the piston main body 19A. The guide shaft portion 19B is slidably inserted into the central hole of the holding cylinder portion 22A, whereby the piston 19 is guided concentrically.

  A display portion 26 for displaying the movement amount of the piston 19 is formed on the peripheral wall of the cylindrical body portion 18. On the display unit 26 of this example, a scale for displaying the amount of movement of the piston 19 in pressure conversion is formed by printing, marking, or the like. The seal ring 24 of the piston 19 serves as a pointer for the display unit 26. Specifically, the cylindrical body portion 18 is transparent at least at a portion where the display portion 26 is formed, and the seal ring 24 is reflected through the transparent portion, so that the piston 19 moves, that is, is compressed. The pressure of air can be indicated. That is, it can function as a pressure gauge.

  The piston 19 is provided with a cylindrical blindfold 19C that covers the spring 20 and the like so that the spring 20 and the like are not reflected in the transparent portion. The blindfold 19C extends concentrically rearward from the rear end of the piston body 19A and covers the periphery of the spring 20.

  An exhaust port 27 is provided in the peripheral wall of the cylindrical body 18. When the compressed air reaches a specified pressure and the seal ring 24 exceeds the exhaust port 27, the exhaust port 27 is connected to the conduction hole 21 and exhausts the compressed air. That is, the pressure gauge 6 can also function as a relief valve that can release overpressure from the exhaust port 27 and regulate the compressed air to a specified pressure.

  Thus, since the pressure gauge 6 itself functions as a relief valve, a time lag between the pressure control of the compressed air and the pressure display does not occur. As a result, it is possible to suppress a divergence phenomenon between the actual tire internal pressure and the display pressure without connecting the chamber to the surge chamber 12B. Reference numeral 28 in FIG. 7 denotes a locking hook that is rotatably attached to the connector portion 18B, and is locked to the connecting tube portion 15 to prevent the pressure gauge 6 from falling off the connecting tube portion 15.

  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, a compressor apparatus having an internal structure shown in FIG. 3 and using a pressure gauge having the structure shown in FIGS. In addition, a pressure gauge having a cylindrical body portion without an exhaust port was made as a comparative example, and a pressure gauge using a commercially available Bourdon tube pressure gauge was made as a prototype. In addition, a relief valve is separately attached to the conventional example and the comparative example.

  Then, each compressor device was connected to the tire, and the tire was pressurized from an internal pressure of 0 to 250 kPa.

  In the case of the conventional example, when the display pressure reaches the specified pressure (250 kPa), the relief valve is operated to suppress the increase in the tire pressure (actual tire internal pressure). However, if the pressure was continuously increased, there was a difference between the displayed pressure and the tire pressure (actual tire internal pressure), and the tire pressure began to gradually increase while the displayed pressure remained constant.

  In the case of the comparative example, it is the same as the conventional example. If the pressure is continuously increased after the relief valve is operated, there is a difference between the displayed pressure and the tire pressure (actual tire internal pressure), and the tire pressure gradually increases while the displayed pressure remains constant. Began to rise.

  In the case of the embodiment, the piston moves until the indicated pressure reaches the specified pressure (250 kPa), and when the pressure exceeds the exhaust port, the piston stops moving, and the tire pressure is increased by exhausting the compressed air from the exhaust port. Suppressed. That is, it functioned as a relief valve. Further, even if the pressure increase was continued as it was, no difference between the displayed pressure and the tire pressure was observed. The results are shown in Table 1.

  As shown in Table 1, it can be confirmed that in the embodiment, the compressed air can be regulated to the specified pressure and the pressure divergence can be suppressed without using a relief valve or a chamber.

DESCRIPTION OF SYMBOLS 1 Tire puncture repair kit 2 Compressor apparatus 5 Compressor main body 6 Pressure gauge 9 Cylinder 9A Main cylinder part 9B Subcylinder part 12A Pump chamber 12B Surge chamber 18 Cylindrical trunk | drum 19 Piston 19C Blindfold 20 Spring 21 Conduction hole 22 Cap 24 Seal Ring 25 Guide part 26 Display part 27 Exhaust port

Claims (5)

A puncture repair kit comprising a compressor device and a bottle unit having an extraction cap attached to the mouth of a bottle container containing puncture repair liquid,
The extraction cap comprises an intake port for sending compressed air from the compressor device into the bottle container, and an extraction port for sequentially taking out the puncture repair liquid and compressed air from the bottle container by feeding this compressed air,
The compressor device has a main cylinder part that forms a pump chamber for compressing air, and a compressor body having a cylinder that has a sub cylinder part that is connected to the main cylinder part and forms a surge chamber that receives compressed air from the pump chamber,
And a pressure gauge for measuring the pressure of the compressed air in the surge chamber,
The pressure gauge is
A cylindrical body having a conduction hole leading to the surge chamber at the front end, and a cap attached to the rear end;
A piston that has a seal ring that seals between the inner peripheral surface of the cylindrical body and that can move in the longitudinal direction in the cylindrical body by compressed air from the conduction hole;
A spring that is disposed between the piston and the cap, biases the piston toward the front end, and changes in displacement according to the pressure of compressed air;
And the display part which displays the movement amount of the said piston is formed in the surrounding wall of the said cylindrical trunk | drum,
An exhaust port is provided in the peripheral wall of the cylindrical body, and the exhaust port is connected to the conduction hole to exhaust the compressed air when the compressed air reaches a specified pressure and the seal ring exceeds the exhaust port. Tire puncture repair kit characterized by   The tire puncture repair kit according to claim 1, wherein at least a portion where the display portion is formed is transparent.   3. The tire puncture repair kit according to claim 2, wherein the seal ring serves as a pointer for the display unit and informs a moving position of the piston by being reflected through the transparent portion.   The tire puncture repair kit according to claim 2, wherein the piston includes a cylindrical blindfold covering the spring. The tire puncture repair kit according to any one of claims 1 to 4 , wherein the cap includes a guide portion that guides the piston concentrically.

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