JP2007044953A - Sealing pump-up device of tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the leak of a sealing agent from a pressure release valve. <P>SOLUTION: In the sealing pump-up device of a tire, a pressure release valve 43 is attached to common use piping 46 for allowing an air compressor 34 to communicate with a suction port 49. That is, the pressure release valve 43 is not provided on the downstream side of a liquid agent container 40 through which the sealing agent 36 injected in a punctured tire 80 flows but provided on the upstream side of the liquid agent container 40 through which the sealing agent 36 injected in the punctured tire 80 does not flow. By this constitution, in the process for injecting the sealing agent 36 in the punctured tire 80, the sealing agent 36 does not pass through the pressure release valve 43 to be prevented from leaking from the pressure release valve 43. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, when a pneumatic tire is punctured, the pneumatic tire is repaired with a sealing agent without replacing the pneumatic tire and the wheel, and the internal pressure of the pneumatic tire is increased (pumped up) to a predetermined reference pressure. This relates to a tire sealing / pump-up device.

  In recent years, when a pneumatic tire (hereinafter simply referred to as “tire”) is punctured, the tire is repaired with a sealing agent without replacing the tire and the wheel, and the internal pressure is increased (pumped up) to a predetermined reference pressure. ) Tire sealing / pump-up devices (hereinafter simply referred to as “pump-up devices”) are in widespread use. As a pump-up device, a pump-up device disclosed in Patent Document 1 is known.

As shown in FIG. 3, the pump-up device 1 of Patent Document 1 includes an air compressor 2 for supplying pressurized air to the tire 9, and a discharge port that accommodates the sealing agent 4 and can discharge the sealing agent 4. 3A and a container 3 having an inlet 3B through which air can flow.
Between this container 3 and the air compressor 2, the rotary valve 14 as a 4 port 2 position switching valve which has the 1st-4th ports 15-18 is arrange | positioned. The first port 15 of the rotary valve 14 and the air compressor 2 communicate with each other via the first conduit 6.

The second port 16 of the rotary valve 14 and the inlet 3 </ b> B of the container 3 communicate with each other via the second conduit 7. The third port 17 of the rotary valve 14 and the discharge port 3 </ b> A of the container 3 communicate with each other via the third conduit 8.
One end of the fourth conduit 10 is connected to the fourth port 18 of the rotary valve 14, and the other end of the fourth conduit 10 can be connected to the tire valve 11 of the tire 9. By connecting the other end of the fourth conduit 10 to the tire valve 11 of the tire 9, the fourth port 18 of the rotary valve 14 communicates with the inside of the tire 9.

According to this configuration, when the air from the tire 9 is released, the rotary valve 14 is rotated to the first position where the first port 15 and the fourth port 18 are communicated (see FIG. 3).
When the rotary valve 14 is rotated to the first position, the first conduit 6 and the fourth conduit 10 communicate with each other via the conduit 12 in the rotary valve 14, and a passage from the air compressor 2 to the inside of the tire 9 is formed. . Through this passage, pressurized air is supplied from the air compressor 2 to the tire 9 to increase the internal pressure of the tire 9.

Further, when the tire 9 is punctured, the rotary valve 14 is rotated to the second position where the first port 15 and the second port 16 are communicated and the third port 17 and the fourth port 18 are communicated. (See FIG. 4).
When the rotary valve 14 is rotated to the second position, the first conduit 6 and the second conduit 7 communicate with each other via the conduit 19 in the rotary valve 14, and the third conduit 8 and the fourth conduit 10 are connected to the rotary valve. Communicating via a conduit 13 in 14.

As a result, a passage from the air compressor 2 to the inlet 3B of the container 3 and a passage from the discharge port 3A of the container 3 to the tire 9 are formed.
By supplying pressurized air from the air compressor 2 to the container 3 through the passage leading from the air compressor 2 to the inlet 3B of the container 3, the sealing agent 4 in the container 3 is pushed out, and the extruded sealing agent is 3 is injected into the tire 9 through a passage that leads to the tire 9 from the discharge port 3A.

Further, when the sealing agent 4 in the container 3 is injected into the tire 9 and the container 3 becomes empty, pressurized air is supplied from the air compressor 2 to the tire 9 via the empty container 3. In this way, the puncture of the tire 9 is repaired.
Here, in the pump-up device, after supplying pressurized air to the tire, a pressure release valve that draws out the air in the tire and finely adjusts the air pressure is usually arranged in a conduit on the tire valve side of the tire. In the pump-up device 1 disclosed in Patent Document 1, the pressure relief valve is disposed in the fourth conduit 10.

JP-T-2004-518560

However, in the pump-up device 1 of Patent Document 1, if a pressure release valve is arranged in the fourth conduit 10, the sealing agent 4 passes through the pressure release valve in the process of injecting the sealant 4, so that the pressure release The sealing agent 4 may leak from the valve.
In view of the above-described facts, an object of the present invention is to provide a tire sealing and pumping device that can prevent a sealing agent from leaking from a pressure relief valve.

  A tire sealing / pump-up device according to claim 1 of the present invention includes an air supply means for supplying pressurized air to the outside, a liquid agent discharge port for containing the sealing agent inside and discharging the sealing agent. And a liquid container having an air inlet for receiving pressurized air therein, an intake port communicating with the air supply means, and a first discharge port communicating with the air inlet of the liquid container via a first conduit And a second discharge port communicating with the liquid agent discharge port of the liquid agent container via a second conduit, and a first position where the suction port communicates with the first discharge port, and the suction port A three-port two-position switching valve that can be switched to a second position for communicating with the second discharge port, one end communicating with the second conduit, and the other end connected to a tire valve of a pneumatic tire A joint member, provided between said air supply means the 3-port 2-position switching valve, characterized by comprising a depressurization a valve capable of releasing air.

According to this configuration, first, the other end of the joint member whose one end communicates with the second conduit is connected to the tire valve of the pneumatic tire. Thereby, the liquid agent discharge port of the liquid agent container communicates with the pneumatic tire via the second conduit and the joint member. That is, a passage is formed from the liquid agent discharge port of the liquid agent container to the inside of the pneumatic tire.
Next, by switching the 3-port 2-position switching valve to the first position, the suction port communicating with the air supply means and the first discharge port communicating with the air receiving port of the liquid container via the first conduit are communicated. Let

Thereby, a passage leading from the air supply means to the air receiving port of the liquid container is formed. Through this passage, pressurized air is supplied from the air supply means to the inside of the liquid agent container to increase the internal pressure of the liquid agent container.
Thereby, the sealing agent accommodated inside the liquid agent container is pushed out from the liquid agent discharge port of the liquid agent container, and is injected from the liquid agent discharge port of the liquid agent container into the pneumatic tire through the second conduit and the joint member.

After injecting the sealing agent into the tire, the three-port two-position switching valve is switched to the second position, thereby communicating with the suction port communicating with the air supply means and the liquid agent discharge port of the liquid agent container via the second conduit. The second discharge port is connected.
Thus, the air supply means communicates with the pneumatic tire via the second conduit and the joint member. That is, a passage leading from the air supply means to the pneumatic tire is formed.

Through this passage, pressurized air is supplied from the air supply means to the pneumatic tire to increase the internal pressure of the pneumatic tire.
After supplying pressurized air to the pneumatic tire, when the internal pressure of the pneumatic tire is higher than the specified pressure, the air supply means and the pneumatic tire communicate with each other via the second conduit and the joint member. Between the air supply means and the 3-port 2-position switching valve, the air is extracted by the pressure release valve, thereby extracting the air in the pneumatic tire through the second conduit and the joint member, and adjusting the air pressure in the pneumatic tire. To do.

Here, in the structure of Claim 1 of this invention, the pressure release valve is provided between the air supply means and the 3 port 2 position switching valve. That is, the pressure release valve is provided not on the downstream side of the liquid agent container through which the sealing agent injected into the pneumatic tire flows but on the upstream side of the liquid agent container through which the sealing agent injected into the pneumatic tire does not flow.
For this reason, in the process of injecting the sealing agent into the pneumatic tire, the sealing agent does not pass through the pressure release valve, and the sealing agent can be prevented from leaking from the pressure release valve.
Accordingly, since the sealing agent does not enter the pressure relief valve, it is not necessary to replace the pressure relief valve, and the tire sealing / pump-up device is easy to use.

Moreover, in the structure of Claim 1 of this invention, the path | route through which the sealing agent inject | poured into a pneumatic tire passes differs from the path | route through which air passes in the process of extracting the air of a pneumatic tire.
That is, the sealing agent injected into the pneumatic tire flows from the liquid agent discharge port of the liquid agent container to the portion where the joint member of the second conduit is connected, and is injected from here through the joint member into the pneumatic tire. On the other hand, the air extracted from the pneumatic tire flows into the second conduit from the pneumatic tire through the joint member, and flows to the first discharge port in the direction opposite to the side where the liquid agent discharge port of the liquid agent container is provided.

Therefore, the air extracted from the pneumatic tire does not flow at least from the inside of the liquid container and from the liquid discharge port of the liquid container to the portion where the joint member of the second conduit is connected.
For this reason, even if the sealing agent remains in the liquid agent container and between the liquid agent discharge port of the liquid agent container and the portion where the joint member of the second conduit is connected, the sealing agent is removed from the pneumatic tire. The sealing agent can be prevented from leaking from the pressure relief valve without being pushed by air and flowing back to the upstream pressure relief valve.

  A tire sealing / pump-up device according to a second aspect of the present invention is the tire sealing / pump-up device according to the first aspect, wherein a pressure gauge for measuring air pressure is provided between the air supply means and the three-port two-position switching valve. It is characterized by that.

According to this configuration, when the air pressure of the pneumatic tire is adjusted, the air supply means and the pneumatic tire communicate with each other via the second conduit and the joint member. By measuring the air pressure with a pressure gauge provided between the valves, the air pressure of the pneumatic tire can be measured.
Thereby, the operator can adjust the air quantity of the pneumatic tire extracted with a pressure release valve based on the measurement result measured with the pressure gauge.

  According to a third aspect of the present invention, there is provided a tire sealing / pump-up device according to the first or second aspect, wherein the tire is provided in the second conduit, and the fluid from the liquid agent discharge port of the liquid agent container to the joint member is provided. And a check valve that prevents the fluid from flowing from the joint member to the liquid agent discharge port of the liquid agent container.

According to this configuration, the check valve provided in the second conduit allows fluid to flow from the liquid agent discharge port of the liquid agent container to the joint member, and allows fluid to flow from the joint member to the liquid agent discharge port of the liquid agent container. Block distribution.
As a result, when the pressurized air is supplied to the pneumatic tire, the pneumatic supply means and the pneumatic tire are pressurized from the pneumatic supply means to the pneumatic tire in a state where they communicate with each other via the second conduit and the joint member. Even if air is supplied, pressurized air does not flow into the liquid container.

  For this reason, since a high air pressure (back pressure) that is substantially equal to the reference pressure of the pneumatic tire does not act on the liquid container, a container having low strength and no special high airtightness can be used as the liquid container. Compared with a sealing / pump-up device using a pressure vessel as a liquid container, the manufacturing cost of the liquid container can be effectively reduced.

  According to a fourth aspect of the present invention, there is provided a tire sealing / pump-up device according to any one of the first to third aspects, wherein the tire sealing / pump-up device is provided in the first conduit and is supplied to the air of the liquid container from the first discharge port. A check valve is provided that allows fluid to flow into the receiving port and prevents flow of fluid from the air receiving port of the liquid container to the first discharge port.

If the air pressure on the pneumatic tire side is higher than the liquid container, the sealing agent in the liquid container may flow backward to the first discharge port side.
According to the configuration of the fourth aspect of the present invention, the check valve provided in the first conduit allows the fluid to flow from the first discharge port to the air receiving port of the liquid agent container, and receives the air in the liquid agent container. The flow of fluid from the inlet to the first discharge port is blocked.

  For this reason, even if the sealing agent in the liquid agent container flows backward to the first discharge port side, the sealing agent does not flow into the first discharge port, and is provided between the air supply means and the 3-port 2-position switching valve. The sealing agent does not flow into the air supply means communicating with the pressure release valve and the first discharge port.

  A tire sealing / pump-up device according to a fifth aspect of the present invention is the relief valve according to any one of the first to fourth aspects, wherein the relief valve is provided between the air supply means and the three-port two-position switching valve. Is provided.

According to this configuration, the relief valve provided between the air supply means and the switching valve causes the air pressure in the tire sealing / pump-up device to reach a predetermined value between the air supply means and the switching valve. Let the air escape.
For this reason, when the air supply means supplies pressurized air to the liquid agent container or the pneumatic tire, it is possible to prevent damage to the liquid agent container or the conduit caused by excessive internal pressure of the liquid agent container or the conduit.

  Since this invention set it as the said structure, it can prevent that a sealing agent leaks from a pressure relief valve.

Hereinafter, a tire sealing / pump-up device according to an embodiment of the present invention will be described.
(Configuration of sealing / pump-up device)
FIG. 1 shows a tire sealing / pump-up device (hereinafter simply referred to as “pump-up device”) 30 according to an embodiment of the present invention. The pump-up device 30 repairs a tire with a sealing agent without replacing the tire and the wheel when a pneumatic tire (hereinafter simply referred to as “tire”) mounted on a vehicle such as an automobile punctures. The internal pressure of the tire is increased (pumped up) to a predetermined reference pressure.

As shown in FIG. 1, the pump-up device 30 includes an air compressor 34 as air supply means for supplying pressurized air to the outside.
The air compressor 34 is formed with an air discharge port 44 for discharging pressurized air to the outside. When operating, the air compressor 34 sucks air from the outside through an air suction port (not shown), pressurizes the suction air at a predetermined compression ratio, and discharges the air from the air discharge port 44 to the outside. The air compressor 34 has a compression capacity capable of compressing atmospheric air to about 0.5 MPa to 1.0 MPa.

The air discharge port 44 of the air compressor 34 is connected to the start end portion (the left end portion in FIG. 1) of the common pipe 46 composed of a pressure-resistant hose, a pipe and the like.
A pressure gauge 45 that measures the air pressure in the common pipe 46 and displays the measurement result is attached to an intermediate portion of the common pipe 46.

In a state where the common pipe 46 and the tire 80 communicate with each other, the air pressure in the tire 80 can be measured by measuring the air pressure in the common pipe 46 with the pressure gauge 45.
Further, a pressure relief valve 43 capable of releasing the air in the common pipe 46 to the outside is attached to the common pipe 46 at a position between the air compressor 34 and the pressure gauge 45.

  Furthermore, a relief valve 42 is attached to the common pipe 46 at a position between the air compressor 34 and the pressure relief valve 43. The relief valve 42 is configured to automatically open the valve when the inside of the common pipe 46 reaches a predetermined pressure (set pressure) and release the air inside the common pipe 46 to the outside. Thereby, the maximum pressure in the common pipe 46 and the pipe connected to the common pipe 46 is defined.

An electromagnetic rotary valve 48 as a three-port two-position switching valve having a suction port 49, a first discharge port 50, and a second discharge port 51 is disposed on the terminal end side (right end side in FIG. 1) of the common pipe 46. ing.
A terminal portion (right end portion in FIG. 1) of the common pipe 46 is connected to the suction port 49. That is, the suction port 49 communicates with the air compressor 34 via the common pipe 46.

The first discharge port 50 is connected to a start end (lower end in FIG. 1) of a first air pipe (first conduit) 56 made of a fluid hose or the like. Connected to the second discharge port 51 is a start end portion (left end portion in FIG. 1) of a second air pipe (second conduit) 54 made of a pipe material having sufficient pressure resistance such as a pressure hose and a metal pipe. .
The rotary valve 48 rotates to be in a first position where the suction port 49 and the first discharge port 50 are communicated (see FIG. 1), and a second position where the suction port 49 and the second discharge port 51 are communicated. (See FIG. 2).

  As the common pipe 46 and the second air pipe 54, a pipe that can withstand a pressure obtained by multiplying the reference pressure of the tire 80 by a predetermined safety factor (usually 2.0 to 5.0) is used. In addition, the reference pressure of the tire 80 varies widely depending on the type of vehicle and the like, but is appropriately set within a range of 0.20 MPa to 0.30 MPa for a passenger car.

  A liquid agent container 40 that accommodates the sealing agent 36 is disposed inside the first air pipe 56 on the end side (the right end side in FIG. 1). The liquid agent container 40 contains a sealing agent 36 in an amount (for example, 200 cc) or more specified for each type of tire to be repaired by the pump-up device 30.

  The sealing agent 36 includes rubber latex such as SBR (styrene butadiene rubber) latex, NBR (acrylonitrile-butadiene rubber) latex, and rubber latex of a mixture of SBR latex and NBR latex, and an aqueous dispersion or an emulsion thereof. It has a resin adhesive added in the state.

Further, the sealing agent 36 may be mixed with a fiber material or whisker made of polyester, polypropylene, glass or the like, or a filler (filler) made of calcium carbonate, carbon black or the like in order to improve the sealing performance against the puncture hole. In addition, silicate or polystyrene particles may be mixed in order to stabilize the sealing performance.
In addition to the above-described components, anti-freezing agents such as glycol, ethylene-glycol, and propylene glycol, antifoaming agents, pH adjusters, and emulsifiers are generally added to the sealing agent 36.

  The liquid container 40 is formed of a resin such as polyethylene or polypropylene. As the liquid container 40, a container having a pressure resistance considerably lower than a pressure (reference pressure) defined as an internal pressure of a general pneumatic tire is used.

  In addition, an air receiving port (air receiving port) 39 for receiving pressurized air and a liquid agent discharge port 38 for discharging the sealing agent 36 are provided at the lower end of the liquid agent container 40. A terminal portion (right end portion in FIG. 1) of the first air pipe 56 is connected to the air receiving port 39.

  Accordingly, the first discharge port 50 of the rotary valve 48 communicates with the air receiving port 39 of the liquid agent container 40 via the first air pipe 56. The first air pipe 56 allows a fluid flow from the first discharge port 50 to the air receiving port 39 and prevents a fluid flow from the air receiving port 39 to the first discharge port 50. Is attached.

In addition, the liquid agent discharge port 38 of the liquid agent container 40 is connected to a start end portion (upper end portion in FIG. 1) of a liquid injection pipe (second conduit) 58 formed of a low-pressure fluid hose or the like.
At the terminal end (right end in FIG. 1) of the liquid injection pipe 58, the terminal end (upper end in FIG. 1) of the second air pipe 54 and the start end (left end in FIG. 1) of the joint hose (joint member) 66 are provided. Is connected.

Thereby, the liquid agent discharge port 38 of the liquid agent container 40 and the second discharge port 51 are communicated with each other via the second air pipe 54 and the liquid injection pipe 58.
A check valve 72 that allows fluid to flow from the liquid agent discharge port 38 to the joint hose 66 and prevents fluid from flowing from the joint hose 66 to the liquid agent discharge port 38 is attached to an intermediate portion of the liquid injection pipe 58. It has been.

  An adapter (not shown) that can be screwed to the tire valve 82 of the tire 80 is attached to a terminal end portion (right end portion in FIG. 1) of the joint hose 66. As the joint hose 66, one having a pressure resistance substantially equal to that of the common pipe 46 and the second air pipe 54 is used. Specifically, as the joint hose 66, it is preferable to use a pressure resistant hose reinforced by reinforcement of nylon or the like.

  The pump-up device 30 is provided with an operation panel (not shown) including a drive / control circuit (not shown) and a power cable (not shown). For example, by inserting the power cable into a socket of a cigarette lighter installed in the vehicle, power is supplied from the vehicle to the drive / control circuit. The drive / control circuit drives and controls the air compressor 34, the pressure relief valve 43, and the rotary valve 48, respectively, according to the operation of the operation panel performed by the operator.

(Operation of sealing / pump-up device)
Next, an operation procedure for repairing the punctured tire 80 using the pump-up device 30 according to the present embodiment will be described.

When the tire 80 is punctured, first, the operator screws the joint hose 66 adapter onto the tire valve 82 of the tire 80 and connects the joint hose 66 to the punctured tire 80.
Accordingly, the punctured tire 80 communicates with the liquid agent discharge port 38 of the liquid agent container 40 via the liquid injection pipe 58 and the joint hose 66.

At this time, the air compressor 34 is stopped, the rotary valve 48 is located at the first position shown in FIG. 1, and the suction port 49 and the first discharge port 50 are in communication with each other.
Thereby, the air compressor 34 communicates with the air receiving port 39 of the liquid agent container 40 through the common pipe 46 and the first air pipe 56. That is, a passage from the air compressor 34 to the air receiving port 39 of the liquid container 40 is formed.

Next, the operator inserts the power cable (not shown) into the socket of the cigarette lighter of the vehicle, and then operates the operation panel (not shown) to activate the air compressor 34. Thus, pressurized air is sent from the air compressor 34 into the liquid agent container 40 through a passage that leads from the air compressor 34 to the air receiving port 39 of the liquid agent container 40.
As a result, the sealing agent 36 accommodated in the liquid agent container 40 is pushed out from the liquid agent discharge port 38 of the liquid agent container 40 by the static pressure of the pressurized air, and the sealing agent 36 passes through the liquid injection pipe 58 and the joint hose 66. It is injected into the tire 80 through.

  Note that the static pressure in the air layer portion of the liquid agent container 40 is set according to the viscosity of the sealing agent 36, and specifically, the static air pressure in the liquid agent container 40 is set to 0. 0 according to the viscosity of the sealing agent 36. The pressure is set in a range of 05 MPa to 0.15 MPa, and the higher the viscosity of the sealing agent 36 in this range, the higher the pressure. Further, when injecting the sealing agent 36 from the liquid agent container 40 into the tire 80, the drive motor of the air compressor 34 is connected to the tire 80 by a drive / control circuit so that the static air pressure in the liquid agent container 40 does not increase suddenly. It is preferable to perform control so as to rotate at a lower speed than when pumping up.

In addition, when the air pressure on the tire 80 side is higher than the liquid container 40, the sealing agent 36 in the liquid container 40 may flow backward to the first discharge port 50 side (shared pipe 46 side).
In the present embodiment, the check valve 70 attached to the first air pipe 56 allows the fluid to flow from the first discharge port 50 to the air receiving port 39 of the liquid agent container 40, and allows the air reception of the liquid agent container 40. The flow of fluid from the inlet 39 to the first discharge port 50 is blocked.

For this reason, even if the sealing agent 36 in the liquid container 40 flows backward to the first discharge port 50 side, the sealing agent 36 does not flow into the first discharge port 50 and the common pipe 46 on the upstream side thereof. The sealing agent 36 does not flow into the air compressor 34 communicating with the pressure relief valve 43 and the common pipe 46 attached to the pipe 46.
When the operator completes the injection of the predetermined amount of the sealing agent 36 from the liquid container 40 into the tire 80, the operator rotates the rotary valve 48 to the second position shown in FIG. 2, and the suction port 49 of the rotary valve 48. Is switched from the first discharge port 50 to the second discharge port 51.

  The completion of the injection of the sealing agent 36 may be determined using the time from the start of the injection as a parameter, and a transparent window portion is provided in the liquid agent container 40, and an operator can inject the amount of the sealing agent 36 through this window portion. You can make sure.

When the suction port 49 and the second discharge port 51 communicate with each other, the air compressor 34 communicates with the tire 80 into which the sealing agent 36 has been injected via the common pipe 46, the second air pipe 54, and the joint hose 66. . That is, a passage from the air compressor 34 to the tire 80 into which the sealing agent 36 is injected is formed.
Through this passage, pressurized air is supplied from the air compressor 34 to the tire 80 to increase the internal pressure of the tire 80 and inflate the tire 80.

In addition, since the check valve 72 is attached to the liquid injection pipe 58, even if pressurized air is supplied from the air compressor 34 to the tire 80, the pressurized air does not flow into the liquid agent container 40.
For this reason, since a high air pressure (back pressure) that is substantially equal to the reference pressure of the tire 80 does not act on the liquid container 40, a container that has low strength and does not require special high airtightness should be used as the liquid container 40. The manufacturing cost of the liquid container can be effectively reduced as compared with a sealing / pump-up device using a pressure vessel as the liquid container.

In addition, when the air compressor 34 supplied pressurized air to the liquid agent container 40 and the tire 80, the air pressure was attached to the common pipe 46 even if the internal pressure of the liquid agent container 40 and each of the pipes 46, 54, 56, 58 was excessive. Since the relief valve 42 allows air to escape from the common pipe 46, the liquid agent container 40 and the pipes 46, 54, 56, and 58 can be prevented from being damaged.
Thereafter, the operator confirms that the internal pressure of the tire 80 has become the specified pressure with the pressure gauge 45 attached to the common pipe 46, operates the operation panel (not shown), and stops the air compressor 34. .

When the air compressor 34 is stopped, if the internal pressure of the tire 80 measured by the pressure gauge 45 is higher than the specified pressure, the air in the common pipe 46 is vented by the pressure relief valve 43 attached to the common pipe 46. Thus, the air in the tire 80 is extracted through the second air pipe 54 and the joint hose 66 to adjust the air pressure in the tire 80.
Next, the worker removes the adapter from the tire valve 82 and disconnects the joint hose 66 from the tire 80.

  The operator travels preliminarily for a certain distance using the tire 80 into which the sealing agent 36 has been injected after the tire 80 has been expanded at the specified pressure and before the sealing agent 36 has been cured. As a result, the sealing agent 36 is uniformly diffused inside the tire 80, and the sealing agent 36 is filled in the puncture hole to close the puncture hole. When the internal pressure of the tire 80 is lowered after the preliminary traveling is completed, the adapter of the joint hose 66 is screwed to the tire valve 82 again, and the air compressor 34 is operated to pressurize the tire 80 to a specified internal pressure. As a result, the puncture repair of the tire 80 is completed, and if the joint hose 66 is removed from the tire 80, normal running using the tire 80 becomes possible.

  Here, in the pump-up device 30 according to the present embodiment, the pressure relief valve 43 is attached to a common pipe 46 that allows the air compressor 34 and the suction port 49 to communicate with each other. That is, the pressure release valve 43 is not located downstream of the liquid agent container 40 through which the sealing agent 36 injected into the punctured tire 80 flows, but upstream of the liquid agent container 40 where the sealing agent 36 injected into the punctured tire 80 does not flow. Is provided.

For this reason, in the process of injecting the sealing agent 36 into the punctured tire 80, the sealing agent 36 does not pass through the pressure relief valve 43, and the sealing agent 36 can be prevented from leaking from the pressure relief valve 43.
Thereby, since the sealing agent 36 does not enter the pressure release valve 43, it is not necessary to replace the pressure release valve 43, and the usability of the pump-up device 30 is improved.

Further, in the configuration of the present embodiment, the path through which the sealing agent 36 injected into the punctured tire 80 passes and the path through which air passes in the process of removing air from the tire 80 supplied with pressurized air are different.
That is, the sealing agent 36 injected into the punctured tire 80 is injected into the tire 80 through the liquid injection pipe 58 and the joint hose 66 from the liquid agent discharge port 38 of the liquid agent container 40. On the other hand, the air drawn from the tire 80 flows into the second air pipe 54 from the tire 80 through the joint hose 66, flows to the first discharge port 51, and flows from here to the common pipe 46.

Therefore, the air extracted from the tire 80 does not flow at least in the liquid agent container 40 and the liquid injection pipe 58.
For this reason, even if the sealing agent 36 remains in the liquid container 40 and the liquid injection pipe 58, the sealing agent 36 is pushed by the air extracted from the tire 80 and flows back to the common pipe 46 on the upstream side. The sealing agent can be prevented from leaking from the pressure relief valve 43.

  In the above embodiment, an air compressor is used as the air supply means. However, when the pump-up device 30 is discarded after one use, compressed air, nitrogen, etc. as the air supply means A gas cylinder filled with this gas may be used, and the pressurized gas supplied from the gas cylinder may be supplied to the liquid container 40 and the tire 80.

  In this embodiment, the rotary valve 48 is used as the three-port two-position switching valve. However, the three-port two-position switching valve of the present invention is not limited to this, for example, a three-way electromagnetic valve that switches by direct acting. It may also be a seat valve using a ball or poppet.

  In this embodiment, the rotary valve 48 as a 3-port 2-position switching valve is electrically controlled by operating the operation panel. However, the switching operation of the valve is performed manually or using air pressure. Any other method may be used.

Moreover, in this embodiment, although the 2nd conduit | pipe of this invention is comprised by two piping of the injection piping 58 and the 2nd air piping 54, you may be comprised by single piping, You may be comprised with three or more piping.
Moreover, in this embodiment, although the 1st conduit | pipe of this invention is comprised by the single 1st air piping 56, you may be comprised by several piping.
The present invention is not limited to the embodiment described above, and various forms are possible.

FIG. 1 is a circuit diagram when a sealing agent is injected into a punctured pneumatic tire in the tire sealing / pump-up device according to the embodiment of the present invention. FIG. 2 is a circuit diagram when supplying pressurized air to a pneumatic tire after injecting a sealing agent into the pneumatic tire in the tire sealing / pump-up device according to the embodiment of the present invention. FIG. 3 is a view showing a conventional tire sealing / pump-up device. FIG. 4 is a view showing a conventional tire sealing / pump-up device.

Explanation of symbols

30 Tire sealing / pump-up device 34 Air compressor (air supply means)
36 Sealant 38 Liquid Discharge Port 39 Air Inlet (Air Inlet)
40 Liquid Agent Container 42 Relief Valve 43 Pressure Relief Valve 45 Pressure Gauge 48 Rotary Valve (3 Port 2 Position Switching Valve)
49 Intake port 50 First exhaust port 51 Second exhaust port 54 Second air piping (second conduit)
56 1st air piping (1st conduit)
58 Injection pipe (second conduit)
66 Joint hose (joint member)
70 Check Valve 72 Check Valve 80 Pneumatic Tire 82 Tire Valve

Claims (5)

Air supply means for supplying pressurized air to the outside;
A liquid agent container that contains a sealing agent inside, a liquid agent discharge port for discharging the sealing agent, and an air receiving port for receiving pressurized air inside;
A suction port that communicates with the air supply means, a first discharge port that communicates with an air receiving port of the liquid agent container via a first conduit, and a liquid agent discharge port of the liquid agent container that communicates via a second conduit. 3 port 2 having 2 discharge ports and switchable to a first position for communicating the suction port and the first discharge port and a second position for communicating the suction port and the second discharge port A position switching valve;
A joint member having one end communicating with the second conduit and the other end being connectable to a tire valve of a pneumatic tire;
A pressure relief valve provided between the air supply means and the 3-port 2-position switching valve, capable of releasing air;
A tire sealing / pump-up device.   The tire sealing / pump-up device according to claim 1, wherein a pressure gauge for measuring air pressure is provided between the air supply means and the 3-port 2-position switching valve.   A check that is provided in the second conduit and allows fluid to flow from the liquid agent discharge port of the liquid agent container to the joint member, and prevents flow of fluid from the joint member to the liquid agent discharge port of the liquid agent container. The tire sealing / pump-up device according to claim 1 or 2, further comprising a valve.   Provided in the first conduit, allows fluid to flow from the first discharge port to the air receiving port of the liquid agent container, and allows fluid to flow from the air receiving port of the liquid agent container to the first discharge port. The tire sealing / pump-up device according to any one of claims 1 to 3, further comprising a check valve for blocking.   The tire sealing / pump-up device according to any one of claims 1 to 4, wherein a relief valve is provided between the air supply means and the 3-port 2-position switching valve.

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