JP6431320B2 - 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.
About.

  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.

  However, in the 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 is higher than the pressure displayed on the pressure gauge. There is a tendency for a divergence phenomenon to occur. Therefore, in the said patent document 1, suppressing the said divergence phenomenon is proposed by connecting the chamber which stores compressed air to the branch chamber of a compressor apparatus.

  However, in this case, a separate chamber is required, which greatly hinders downsizing and cost reduction of the compressor device.

JP 2012-101373 A

  Therefore, an object of the present invention is to provide a tire puncture repair kit that can suppress a display pressure divergence phenomenon without using a chamber and can reduce the size and cost of a compressor device.

The present invention relates to a puncture repair kit comprising a compressor device having a compressed air discharge port for discharging compressed air, and a bottle unit having an extraction cap attached to the mouth of a bottle container containing puncture repair liquid. ,
The extraction cap is
An intake port portion that can be directly connected to the compressed air discharge port portion and takes compressed air from the compressed air discharge port portion into the bottle container through the first flow path;
A take-out port for sequentially taking out the puncture repair liquid and compressed air from the bottle container through the second flow path by taking in the compressed air;
Including a one-way valve interposed in the first flow path to prevent the puncture repair liquid from flowing back to the compressor device side;
The compressor device accommodates a piston in a reciprocable manner from a bottom dead center to a top dead center, and forms a cylindrical main cylinder portion that forms a pump chamber for compressing air between the piston and the main cylinder portion. A cylinder having a sub-cylinder portion that forms a branch chamber that is continuous and receives compressed air from the pump chamber;
In addition, an air supply passage for sending compressed air from the branch chamber to the compressed air discharge port, a pressure gauge for measuring the pressure of the compressed air, and a relief valve are connected to the branch chamber, and the main cylinder portion The ratio V2 / V1 of the pump chamber volume V2 at the bottom dead center to the pump chamber volume V1 at the top dead center is 7 or less and 4.5 or more, and the height L1 of the pump chamber at the top dead center is 5.0 mm. It is characterized by the above.

  In the tire puncture repair kit according to the present invention, the ratio V2 / V1 is preferably in the range of 4.5 to 5.4.

  In the tire puncture repair kit according to the present invention, in the main cylinder portion of the compressor device, the compression ratio V2 / V1 in the pump chamber is set to 7 or less, which is lower than the conventional one, and the height L1 of the pump chamber at the top dead center. Is set to 5.0 mm or higher, which is higher than before. The conventional compression ratio V2 / V1 was about 30 or more, and the height L1 was about 0.5 mm.

  Thus, by reducing the ratio V2 / V1 and increasing the height L1, the pressure fluctuation range of the compressed air in the branch chamber can be reduced, and the display pressure of the pressure gauge and the actual internal pressure of the tire can be reduced. A divergence phenomenon that is a difference can be suppressed.

It is a perspective view which shows an example of the use condition of the puncture repair kit of this invention. It is sectional drawing which shows one Example 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 the principal part of a compressor main body. It is a schematic sectional drawing explaining the volumes V1 and V2 of a pump chamber. It is a conceptual diagram explaining an effect. It is sectional drawing which shows an extraction cap with a bottle container. It is a fragmentary sectional view which shows the connection state of a compressor apparatus and a bottle unit.

Hereinafter, embodiments of the present invention will be described in detail.
As shown in FIG. 1, the puncture repair kit 1 of this embodiment includes a compressor device 2 having a compressed air discharge port 8 for discharging compressed air, and an extraction cap at the mouth of a bottle container 18 containing puncture repair liquid. And a bottle unit 3 to which 19 is attached.

  As shown in FIG. 7, the bottle container 18 protrudes from the lower end of the body portion 18B with a small-diameter cylindrical mouth portion 18A through which puncture repair liquid can be taken in and out.

  The extraction cap 19 can be directly connected to the compressed air discharge port 8 of the compressor device 2, and an intake port 41 for sending the compressed air from the compressed air discharge port 8 into the bottle container 18, and the compressed air A take-out opening 42 for taking out the puncture repair liquid and compressed air from the bottle container 18 by feeding is provided.

  Specifically, the extraction cap 19 includes a bottom plate portion 31 forming a bottom surface, a bottle mounting portion 32 to which the mouth portion 18A of the bottle container 18 is attached, and a constricted portion 33 disposed therebetween. It has a main body 19A. In the cap main body 19A, a first flow path 35 extending from the intake port portion 41 into the mouth portion 18A of the bottle container 18 and a first flow channel 35 extending from the take-out port portion 42 into the mouth portion 18A of the bottle container 18 are provided. 2 flow paths 36 are formed.

  The bottle attachment portion 32 has an attachment recess 32A for fixing the mouth portion 18A, and a boss portion 32B protruding from the bottom surface of the attachment recess 32A. The mounting recess 32A can be screwed into the mouth portion 18A with an internal screw provided on the inner wall surface thereof. On the upper surface of the boss portion 32B, a first flow path opening 35a that forms the upper end of the first flow path 35 and a second flow path opening 36a that forms the upper end of the second flow path 36 are provided. Each is open. The first flow path 35 is provided with a one-way valve 37 for preventing the puncture repair liquid from flowing back to the compressor device 2 side. Various well-known structures can be employed as the one-way valve 37.

  In this example, the intake port portion 41 is a connection nozzle that protrudes from the constricted portion 33 toward the compressed air discharge port portion 8, and as shown in FIG. 8, the connection nozzle (intake port portion 41). Is fitted directly into the compressed air outlet 8 so that it is directly connected without a hose.

  Next, as shown in FIG. 2, the compressor device 2 accommodates a compressor body 4 that generates compressed air in a storage case 9 so as to be integrally transportable. The compressor body 4 includes a motor M, a piston 5 connected to the motor M via a crank mechanism 11, and a cylinder 7 that accommodates the piston 5 so as to be capable of reciprocating.

  The storage case 9 forms a flat, substantially rectangular parallelepiped box having a small height. 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 10 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 of the storage case 9. As the crank mechanism 11, various known structures can be employed.

  As shown in FIGS. 3 and 4, the cylinder 7 includes a main cylinder portion 7A and a sub cylinder portion 7B. The main cylinder portion 7A accommodates the piston 5 so as to be capable of reciprocating from the bottom dead center PL (shown in FIG. 5) to the top dead center PU and compresses air between the piston 5 and the piston chamber 6A. Form. The sub cylinder portion 7B is connected to the main cylinder portion 7A, and forms a branch chamber 6B that receives the compressed air compressed in the pump chamber 6A through the exhaust valve 13. In the branch chamber 6B, an air supply path 16 for sending compressed air from the branch chamber 6B to the compressed air discharge port 8, a pressure gauge 17 for measuring the pressure of the compressed air, and an overpressure of the compressed air are released. A relief valve 15 is connected. Known pressure gauges 17 and relief valves 15 can be used.

  The exhaust valve 13 includes a conduction hole 13A that conducts the pump chamber 6A and the branch chamber 6B, a valve body 13B that is made of, for example, a rubber member that closes the conduction hole 13A from the branch chamber 6B side, and a sub-portion with the valve body 13B. Coil spring-like spring means 13C arranged between the cylinder portion 7B and the lid portion 7B1 and biasing the valve body 13B toward the conduction hole 13A. The exhaust valve 13 is activated by pressurization of the pump chamber 6A, and opens the conduction hole 13A. The operating force at this time is preferably as small as possible, 80 kPa or less, further 50 kPa or less when converted to the pressure to the valve body 13B.

  The intake valve 12 includes an intake hole 12A that passes through the piston 5 and sucks outside air into the pump chamber 6A, and a valve body 12B that elastically closes the intake hole 12A from the pump chamber 6A side. . When the intake valve 12 descends from the top dead center PU, the intake hole 12A is opened by the negative pressure in the pump chamber 6A, and outside air is sucked into the pump chamber 6A. Further, when rising from the bottom dead center PL, the intake hole 12A is closed by the elasticity of the valve body 12B and the pressurization in the pump chamber 6A.

  In the cylinder 7, as shown in FIG. 5, the ratio V2 / V1 between the volume V2 of the pump chamber 6A at the bottom dead center PL and the volume V1 of the pump chamber 6A at the top dead center PU is set to 7 or less, which is lower than the conventional one. In addition, the height L1 of the pump chamber at the top dead center PU is set to 5.0 mm or higher, which is higher than before. The conventional ratio V2 / V1 is about 30 or more, and the height L1 is about 0.5 mm.

  Thus, by making the ratio V2 / V1 small and the height L1 large, the pressure fluctuation range of the compressed air in the branch chamber 6B can be kept small. As a result, it is possible to suppress a divergence phenomenon that is a difference between the display pressure of the pressure gauge 17 and the actual internal pressure of the tire T without using a conventional chamber.

As conceptually shown in FIG. 6, the pressure of the pump chamber 6A at the top dead center PU is P1, the pressure of the pump chamber 6A at the bottom dead center PL is P2 (= atmospheric pressure), and the volume of the branch chamber 6B is VB, compressed. When the pressure in the previous branch chamber 6B is PBa and PBb after compression, the following relationship is established.
V1 × P1 = V2 × P2 --- (1)
PBb × (VB + V1) = (VB × PBa + V1 × P1) --- (2)
That is,
PBb = (VB × PBa + V2 × P2) / (VB + V1) --- (3)

  Here, when V2 is fixed and V1 is a variable, as V1 increases, PBb after compression decreases from Equation (3), and the pressure fluctuation in the branch chamber 6B before and after compression can be reduced. I understand. Therefore, by making V1 relatively large with respect to V2, that is, by reducing the ratio V2 / V1, it is possible to suppress the pressure fluctuation in the branch chamber 6B.

  In particular, when the ratio V2 / V1 is 7 or less and the height L1 is 5.0 mm or more, the display pressure deviation phenomenon can be suppressed. When the ratio V2 / V1 exceeds 7, the pressure fluctuation cannot be sufficiently suppressed. On the other hand, if the height L1 is less than 5.0 mm, and further less than 3.0 mm, the pressure rise rate of the compressed air is slowed, and the puncture repair is delayed.

The maximum air pressure of passenger car tires, and the maximum air pressure in light and standard versions of light truck tires is 350 to 450 kPa (gauge pressure). Therefore, it is preferable that the maximum pressure of the compressed air generated by the compressor device 2 is in the range of 350 to 450 kPa (gauge pressure) in order to suppress an increase in cost due to excessive performance. Accordingly, when the maximum pressure is 350 kPa (4511.33 kPa in absolute pressure), V2 / V1 = P1 / P2 = 451.33 / 101.33≈4.5 from the above equation (1).
When the maximum pressure is 450 kPa (5511.33 kPa in absolute pressure), V2 / V1 = P1 / P2 = 551.33 / 101.33≈5.4 from the above equation (1).

  Accordingly, the ratio V2 / V1 is preferably 4.5 to 5.4 in order to suppress excess performance.

  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, the compressor apparatus 2 shown in FIGS. And each compressor apparatus 2 was connected to the tire, and when the compressor apparatus 2 was operated, the pressure fluctuation in the branch chamber 6B was monitored using a pressure sensor (different from the pressure gauge 17). The pressure fluctuations are the maximum pressure Pmax (pressure when the piston reaches top dead center PU) and the minimum pressure Pmin (when the piston reaches bottom dead center PL) when 15 minutes have passed. Pressure). Further, the difference (deviation) between the tire internal pressure at the time of 15 minutes and the display pressure of the pressure gauge 17 was evaluated.

  As shown in Table 1, in the example, it can be confirmed that the pressure fluctuation in the branch chamber and the difference between the tire internal pressure and the display pressure of the pressure gauge are small.

DESCRIPTION OF SYMBOLS 1 Punk repair kit 2 Compressor apparatus 3 Bottle unit 5 Piston 6A Pump chamber 6B Branch chamber 7 Cylinder 7A Main cylinder part 7B Subcylinder part 8 Compressed air discharge port 15 Relief valve 16 Air supply path 17 Pressure gauge 18 Bottle container 18A Port Portion 19 Extraction cap 35 First flow path 36 Second flow path 37 One-way valve 41 Inlet port 42 Outlet port PL Bottom dead center PU Top dead center

Claims (2)

A puncture repair kit comprising a compressor device having a compressed air discharge port for discharging compressed air, and a bottle unit having an extraction cap attached to the mouth of a bottle container containing puncture repair liquid,
The extraction cap is
An intake port portion that can be directly connected to the compressed air discharge port portion and takes compressed air from the compressed air discharge port portion into the bottle container through the first flow path;
A take-out port for sequentially taking out the puncture repair liquid and compressed air from the bottle container through the second flow path by taking in the compressed air;
Including a one-way valve interposed in the first flow path to prevent the puncture repair liquid from flowing back to the compressor device side;
The compressor device accommodates a piston in a reciprocable manner from a bottom dead center to a top dead center, and forms a cylindrical main cylinder portion that forms a pump chamber for compressing air between the piston and the main cylinder portion. A cylinder having a sub-cylinder portion that forms a branch chamber that is continuous and receives compressed air from the pump chamber;
In addition, an air supply passage for sending compressed air from the branch chamber to the compressed air discharge port, a pressure gauge for measuring the pressure of the compressed air, and a relief valve are connected to the branch chamber, and the main cylinder portion The ratio V2 / V1 of the pump chamber volume V2 at the bottom dead center to the pump chamber volume V1 at the top dead center is 7 or less and 4.5 or more, and the height L1 of the pump chamber at the top dead center is 5.0 mm. Tire puncture repair kit characterized by the above.
The tire puncture repair kit according to claim 1, wherein the ratio V2 / V1 is set in a range of 4.5 to 5.4.

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