JP2008023764A - Sealing pumping-up device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing pumping-up device capable of suppressing the leak amount of a sealant during repairing. <P>SOLUTION: First, the compressed air formed by a compressor is supplied to a pneumatic tire 32 through piping 14, a branch part 16, piping 20, a changeover valve 28 and a joint hose 30. When the pneumatic tire 32 becomes the set pressure P<SB>1</SB>of internal pressure P ≥ releaf valve 22, the releaf valve 22 is operated, the compressed air is supplied into a solvent container 26 through the releaf valve 22, the sealant of the liquid container 26 is pushed to the changeover valve 28 by inflow air, a flow is changed over in the changeover valve 28 and the sealant is supplied into a tire through the changeover valve 28 and a joint hose 30. Since the liquid container 26 is filled with the sealant after the filling with air, the time from the filling with the sealant to preparatory running is shortened and the leak amount of the sealant from a puncture hole is reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sealing / pump-up device for injecting a sealing agent for sealing a punctured pneumatic tire into the pneumatic tire and supplying compressed air into the pneumatic tire to increase the internal pressure of the pneumatic tire. About.

  In recent years, when a pneumatic tire (hereinafter simply referred to as “tire”) is punctured, the tire is repaired with a sealing agent and the internal pressure is pumped up to a specified pressure without replacing the tire and wheels. Pump-up devices are widespread. As this type of sealing / pump-up device, for example, those described in Patent Documents 1 and 2 are known.

In the conventional sealing / pump-up device, first, the puncture sealing agent in the container provided in the device is injected into the punctured pneumatic tire, then filled with air, and preliminary running is performed. The agent is filled inside the puncture hole and solidified to perform puncture repair.
JP 2006-110762 A JP 2004-338158 A

  By the way, after injecting the sealing agent, it takes time to fill the air up to the internal pressure required for running (the air filling time is, for example, about 10 minutes. Therefore, there is a problem that the sealing agent leaks from the puncture hole to the outside before the puncture hole is closed after the preliminary running. In addition, the container needs to be filled with a large amount of sealing agent in advance in consideration of the amount of leakage from the puncture hole.

  An object of the present invention is to provide a sealing / pump-up device capable of suppressing the leakage amount of the sealing agent during repair in consideration of the above facts.

  A sealing pump-up device according to claim 1 of the present invention includes a liquid agent supply source that contains a sealing agent and includes an air inflow portion and a sealing agent discharge portion, an air supply source that generates compressed air, A gas-liquid supply pipe provided with a connecting portion capable of being connected to a valve of a pneumatic tire on one end side, and the air supply source and the other end side of the gas-liquid supply pipe until reaching a predetermined specified pressure; When the pressure exceeds the specified pressure, the air supply source communicates with the inflow portion of the liquid agent supply source, and the discharge portion of the liquid agent supply source and the other end side of the gas-liquid supply pipe And switching means for communicating with each other.

Next, the operation of the sealing / pump-up device according to claim 1 will be described.
In order to repair a pneumatic tire with the sealing / pump-up device according to the first aspect, first, the connecting portion of the gas-liquid supply pipe is connected to the valve of the pneumatic tire.
When the air supply source is activated, the switching means communicates the air supply source and the other end side of the gas-liquid supply pipe until reaching a predetermined specified pressure, so that the compressed air generated by the air supply source is The pneumatic tire is filled through the gas-liquid supply pipe.

  Thereafter, when the pressure becomes equal to or higher than the specified pressure, the switching unit communicates the air supply source and the inflow portion of the liquid agent supply source, and communicates the discharge portion of the liquid agent supply source and the other end side of the gas-liquid supply pipe. Thereby, compressed air flows in from the inflow part of a liquid supply source, and the sealing agent accommodated in the inside is pushed out from the discharge part. The extruded sealing agent is filled into the pneumatic tire through the gas-liquid supply pipe. After the sealing agent is filled, preliminary running is performed, so that the sealing agent is filled in the puncture holes and solidified, and the pneumatic tire is repaired.

  In the sealing pump-up device according to claim 1, since the air is first filled and then the sealing agent is filled, the time from the filling of the sealing agent to the preliminary running is filled with the air after filling the sealing agent. Therefore, the leakage amount of the sealing agent from the puncture hole can be suppressed.

  According to a second aspect of the present invention, in the sealing / pump-up device according to the first aspect, the switching means includes a switching valve that switches the flow path based on the pressure on the air supply source side. It is characterized by.

Next, the operation of the sealing / pump-up device according to claim 2 will be described.
In the sealing / pump-up device according to claim 2, the switching valve is not switched until the air supply source is operated and the pressure on the air supply source side reaches a predetermined pressure set in advance. Air from the source is supplied to the pneumatic tire.
Then, when the pressure on the air supply source side increases and the pressure reaches a predetermined pressure set in advance, the flow path of the switching valve is switched, and the sealing agent is supplied to the pneumatic tire.

  According to a third aspect of the present invention, in the sealing / pump-up device according to the first aspect, the switching means is a pressure sensor that detects a pressure on the air supply source side, and an electromagnetically operated type that switches a flow path. It has a switching valve, and a control device which operates the switching valve based on a pressure detection signal from the pressure sensor.

Next, the operation of the sealing / pump-up device according to claim 3 will be described.
In the sealing and pump-up device according to the third aspect, the pressure on the air supply source side is detected by the pressure sensor. The control device does not switch the switching valve until the air supply source operates and the pressure on the air supply source side reaches a predetermined pressure set in advance, and the air from the air supply source is supplied to the pneumatic tire. To be supplied.
Then, when the pressure on the air supply source side rises and the pressure reaches a predetermined preset pressure, the control device operates the switching valve to switch the flow path, and the sealing agent is supplied to the pneumatic tire. .

  Since the sealing / pump-up device according to the present invention has the above-described configuration, the sealing / pump-up device has an excellent effect of being able to suppress the leakage of the sealing agent during repair. Moreover, since the leakage amount of the sealing agent can be suppressed, the amount of the sealing agent filled in the liquid supply source can be reduced as compared with the conventional case.

Hereinafter, a sealing / pump-up device according to an embodiment of the present invention will be described.
FIG. 1 shows a sealing / pump-up device 10 according to an embodiment of the present invention. The sealing / pump-up device 10 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. Then, the internal pressure is re-pressurized (pumped up) to a predetermined specified pressure.

  As shown in FIG. 1, the sealing / pump-up device 10 includes a compressor unit 12 that generates compressed air. The compressor unit 12 is provided with a motor, an air compressor, a power supply circuit, a control board, and the like inside, and a power cable extending from the power supply circuit to the outside of the unit. For example, by inserting a plug provided at the tip of the power cable into a socket of a cigarette lighter installed in the vehicle, power can be supplied to a motor or the like through a power circuit by a battery mounted on the vehicle. Here, the compressor unit 12 can generate compressed air having a pressure (for example, 300 kPa or more) higher than a specified pressure defined for each type of pneumatic tire 32 to be repaired by the air compressor.

One end of a pipe 14 is connected to the air discharge port of the compressor unit 12. The other end of the pipe 14 is connected to the pipe 18 and the pipe 20 via the branch 16.
The pipe 18 is connected to the inlet side of the relief valve 22, and one end of the pipe 24 is connected to the outlet side of the relief valve 22. The other end of the pipe 24 is connected to the lower end of the liquid agent container 26 containing the sealing agent.

  The liquid container 26 is molded from various resin materials having gas barrier properties and metal materials such as aluminum alloys. The liquid agent container 26 is filled with a slightly larger amount of sealing agent than a prescribed amount (for example, 200 g to 400 g) according to the type and size of the pneumatic tire 32 to be repaired by the sealing / pump-up device 10. Yes. In the liquid agent container 26 of the present embodiment, the sealing agent is filled without any gaps, but an inert gas such as Ar is sealed at the time of shipment in order to prevent deterioration due to oxidation or the like of the sealing agent. A small amount of the agent may be sealed in the liquid agent container 26.

On the other hand, the pipe 20 is connected to the first inlet 28 </ b> A of the switching valve 28.
One end of a pipe 29 is connected to the lower end of the liquid agent container 26, and the other end of the pipe 29 is connected to the second inlet 28 </ b> B of the switching valve 28.
One end of a joint hose 30 is connected to the outlet 28 </ b> C of the switching valve 28, and a joint 36 that can be connected to the tire valve 34 of the pneumatic tire 32 is attached to the other end of the joint hose 30.

As shown in FIG. 2, the switching valve 28 includes a cylindrical ball storage chamber 42 that stores a steel ball 40 inside a block 38.
A spring accommodating chamber 44 having a smaller diameter than the ball accommodating chamber 42 is provided on one end side in the axial direction of the ball accommodating chamber 42, and communicated with the first inlet 28 </ b> A on the other axial end side of the ball accommodating chamber 42. The first passage 48 is connected. An outlet passage 50 that communicates with the outlet 28 </ b> C communicates with the outer peripheral surface of the ball housing chamber 42.

On the other hand, a second passage 46 communicating with the second inlet 28 </ b> B is connected to the opposite side of the spring accommodation chamber 44 to the accommodation chamber side.
Here, an O-ring 52 is fitted into a step formed between the ball housing chamber 42 and the first passage 48, and this O-ring portion serves as a valve seat.

  An O-ring 54 is fitted into a step formed between the ball storage chamber 42 and the spring storage chamber 44, and this O-ring portion serves as a valve seat.

  A spring 56 for urging the steel ball 40 toward the O-ring 52 is disposed in the spring accommodating chamber 44. Therefore, in a state where no pressure is applied, the steel ball 40 biased by the spring 56 is pressed against the O-ring 52 so that the ball housing chamber 42 and the first passage 48 (first inlet 28A) communicate with each other. Is blocked, and the second passage 46 (second inlet 28B) and the outlet passage 50 (outlet 28C) communicate with each other.

Here, the switching valve 28, the cross-sectional area of the first passage 48, and S the cross-sectional area of the second passage 46, respectively, pressure P _A of the first passage _48, the pressure in the second passage 46 P _B , when the spring force of the spring 56 is Fs, and when P _A · S <P _B · S + Fs, the steel ball 40 is pressed against the O-ring 52 and the second passage 46 and the outlet passage 50 are If the relationship P _A · S> P _B · S + Fs is established, the steel ball 40 is separated from the O-ring 52 so that the first passage 48 and the outlet passage 50 communicate with each other.

(Function)
Next, the operation of the sealing / pump-up device 10 of this embodiment will be described.
When the device is operated and the relationship between the internal pressure P of the pneumatic tire 32 and the set pressure P ₁ of the relief valve 22 is P <P ₁ , the relief valve 22 does not operate and the switching valve 28 has a second passage. 46, no pressure is applied, and P _A · S> P _B · S + Fs is established. Therefore, in the switching valve 28, the first passage 48 and the outlet passage 50 communicate with each other. It is supplied to the pneumatic tire 32 via the branch 16, the pipe 20, the switching valve 28, and the joint hose 30. As a result, the pneumatic tire 32 is filled with air and the internal pressure increases.

Further internal pressure increases and becomes P ≧ P _1, the relief valve 22 is activated, compressed air is supplied into the liquid agent container 26 through the relief valve 22, switched by the air sealing agent of the liquid agent container 26 flows into It is pushed out to the valve 28 side. In the switching valve 28, the pressure P _B of the second passage 46 increases and becomes P _A · S <P _B · S + Fs, so that the steel ball 40 is pressed against the O-ring 52 and the second passage 46 and the outlet passage 50 and the sealing agent are supplied into the tire via the switching valve 28 and the joint hose 30.

When the pneumatic tire is for a passenger car, the internal pressure of the pneumatic tire 32 is approximately 200 kPa, although it varies depending on the load applied. For a pneumatic tire for passenger cars, the set pressure _{P 1} of the relief valve 22 is preferably greater than or equal to 20 kPa, it is preferably set to -10 to-50 kPa for the specified pressure of the pneumatic tire. Also, in the case of pneumatic tires for passenger cars, the set pressure P ₁ of the relief valve 22, it is further preferable to 0 to-10 kPa for the specified pressure of the pneumatic tire.

  After supplying the sealing agent, the operator preliminarily travels the pneumatic tire 32 into which the sealing agent has been injected over a certain distance (for example, 10 km) within a certain time after completion of the tire inflation. As a result, the sealing agent uniformly diffuses inside the tire, and the sealing agent is filled in the puncture hole, so that the puncture hole is reliably closed.

In the sealing / pump-up device 10 according to the present embodiment, the air filling and the sealing agent filling are automatically switched, so that the operation becomes easy.
In addition, since the punctured pneumatic tire 32 is first filled with air and then filled with a sealing agent, the sealing agent is applied to a conventional apparatus that injects air after injecting the sealing agent. The time from the injection to the start of preliminary running is shortened, and the amount of sealing agent leaking from the puncture hole can be suppressed. Further, since the leakage of the sealing agent can be suppressed, the amount of the sealing agent to be filled in the liquid agent container 26 can be reduced as compared with the conventional case, and the liquid agent container 26 can be reduced in size, thereby reducing the cost. As an example, the conventional system has a leakage of about 300 cc, but in this embodiment, the leakage is suppressed to about 80 cc.

[Second Embodiment]
Next, a second embodiment of the sealing / pump-up device 10 will be described. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.

As shown in FIG. 3, in the sealing / pump-up device 10 of this embodiment, a pilot operated switching valve 58 is provided instead of the branch 16 and the relief valve 22, and a check valve is used instead of the switching valve 28. 60 and a branch 62 are provided.
The pilot operated switching valve 58 has a first state in which the pipe 14 and the pipe 20 are communicated and the pipe 14 and the pipe 24 are not communicated, and the pipe 14 and the pipe 24 are communicated and the pipe 14 and the pipe 20 are communicated. It is possible to switch to the second state that is not allowed to occur.

The pilot-operated switching valve 58 is adapted to be switched automatically by the pressure of the piping 14 (pilot pressure), P <when P ₁ is energized the spool were received in one direction by the spring It is in the first state. For this reason, the compressed air generated by the compressor is supplied into the pneumatic tire through the pipe 14, the pilot operated switching valve 58, the pipe 20, the branch 62, and the joint hose 30, and the internal pressure of the pneumatic tire 32 is increased. To rise. In addition, since the check valve 60 is provided, compressed air does not go from the branch 62 to the liquid agent container 26 side.

When the internal pressure rises and P ≧ P ₁ , the pilot operated switching valve 58 switches to the second state (the spool moves to compress the spring), and the compressed air is supplied to the liquid agent via the pilot operated switching valve 58. The sealant in the liquid container 26 is supplied to the inside of the container 26 and is pushed out to the pipe 29 side by the air that has flowed in. The sealing agent pushed out to the pipe 29 is supplied into the pneumatic tire 32 through the check valve 60, the branch 62, and the joint hose 30.

Thus, also in the sealing / pump-up device 10 of the present embodiment, the supply of air and the supply of sealing agent can be automatically switched.
In the case of pneumatic tires for passenger cars, the set pressure _{P 1} of the pilot-operated switching valve 58, preferably greater than or equal to 20 kPa, be set to -10 to-50 kPa for the specified pressure of the pneumatic tire Is preferred. Also, in the case of pneumatic tires for passenger cars, the set pressure P ₁ of the pilot-operated switching valve 58, it is further preferable to 0 to-10 kPa for the specified pressure of the pneumatic tire.

[Third Embodiment]
Next, a third embodiment of the sealing / pump-up device 10 will be described. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.
As shown in FIG. 4, the sealing / pump-up device 10 of this embodiment includes a pilot-operated 4-port 2-position switching valve 64.

  The 4-port 2-position switching valve 64 includes a first connection port 64A, a second connection port 64B, a third connection port 64C, and a fourth connection port 64D. The 4-port 2-position switching valve 64 includes a pipe 24 connected to the liquid agent container 26 at the first connection port 64A, a pipe 14 on the compressor unit 12 side, and a third connection port at the second connection port 64B. The joint hose 30 is connected to the pipe 29 connected to the liquid container 26 at 64C and the fourth connection port 64D.

When the compressor is not operating normally, the 4-port 2-position switching valve 64 is in the first state, the first connection port 64A and the second connection port 64B are closed, and the second connection port 64B The fourth connection port 64D communicates.
On the other hand, in the second state, the first connection port 64A and the fourth connection port 64D communicate with each other, and the second connection port 64B and the third connection port 64C communicate with each other.

The four-port two-position switching valve 64 is adapted to automatically switched by the pressure of the second connection port 64B side (pilot pressure), when P <of P _1, it biased spool spring The first state is brought in one direction. For this reason, the compressed air generated by the compressor is first supplied into the pneumatic tire through the pipe 14, the 4-port 2-position switching valve 64, and the joint hose 30, and the internal pressure of the pneumatic tire 32 increases.

Internal pressure increases and becomes P ≧ P _1, 4-port 2-position switching valve 64 (moved toward the spool compressing the spring) switches to the second state, the compressed air and the second pilot operated changeover valve 58 From the connection port 64B to the inside of the liquid agent container 26 through the third connection port 64C and the pipe 29. Then, the sealing agent in the liquid container 26 pushed out by the inflowing air passes through the piping 24, the first connection port 64 </ b> A of the pilot operated switching valve 58 to the fourth connection port 64 </ b> D, and the joint hose 30. 32 is supplied to the inside.

Thus, also in the sealing / pump-up device 10 of the present embodiment, the supply of air and the supply of sealing agent can be automatically switched.
In the case of pneumatic tires for passenger cars, the set pressure _{P 1} of the 4-port 2-position switching valve 64, preferably greater than or equal to 20 kPa, set to -10 to-50 kPa for the specified pressure of the pneumatic tire It is preferable. Also, in the case of pneumatic tires for passenger cars, the set pressure P ₁ of the 4-port 2-position switching valve 64, it is further preferable to 0 to-10 kPa for the specified pressure of the pneumatic tire.

[Fourth Embodiment]
Next, a fourth embodiment of the sealing / pump-up device 10 will be described. In addition, the same code | symbol is attached | subjected to the same structure as embodiment mentioned above, and the description is abbreviate | omitted.
As shown in FIG. 5, the sealing / pump-up device 10 of this embodiment is a modification of the third embodiment, and the 4-port 2-position switching valve 64 of the third embodiment is an electromagnetically operated type. It is a thing.

Further, the sealing / pump-up device 10 of the present embodiment includes a pressure sensor 68 capable of detecting the pressure (P) of the pneumatic tire 32, a pressure detection signal from the pressure sensor 68, and a pressure value stored (or set) in advance. (P ₂ ) and a control device 70 that controls the 4-port 2-position switching valve 64 and the compressor unit 12 based on the air pressure set in the pneumatic tire 32 and the like. The control device 70 stores (or sets) a designated pressure of the pneumatic tire 32 in advance.

  In the sealing / pump-up device 10 of the present embodiment, first, since the 4-port 2-position switching valve 64 is in the first state as in the third embodiment, the compressed air generated by the compressor is first Is supplied to the inside of the pneumatic tire through the pipe 14, the 4-port 2-position switching valve 64, and the joint hose 30, and the internal pressure of the pneumatic tire 32 increases.

Internal pressure rises, the detected pressure becomes a P ≧ P _2, the control device 70, 4 switches the port 2-position switching valve 64 to the second state, the compressed air is the second four-port two-position switching valve 64 The liquid is supplied from the connection port 64 </ b> B to the inside of the liquid agent container 26 through the third connection port 64 </ b> C and the pipe 29. Then, the sealing agent of the liquid container 26 pushed out by the inflowing air enters the air via the first connection port 64A to the fourth connection port 64D and the joint hose 30 of the pipe 24, the 4-port 2-position switching valve 64. It is supplied to the inside of the tire 32.

  In addition, since discharge | emission of sealing agent will be complete | finished when the preset time passes after the 4 port 2 position switching valve 64 was switched to the 2nd state, the control apparatus 70 stops the action | operation of a compressor. In this embodiment, the operation of the compressor can be automatically stopped, and the workability is further improved.

[Other Embodiments]
In the fourth embodiment, the operation of the compressor is stopped after finishing the discharge of the sealing agent. However, after the operation of the compressor is stopped, the pressure P is detected and the pressure set in the pneumatic tire 32 is reached. If the controller 70 determines that there is no, after switching the 4-port 2-position switching valve 64 to the first state, operating the compressor, filling with air until the specified pressure is reached, and making the final adjustment, The operation of the compressor may be stopped.
In the present embodiment, since the apparatus automatically sets the internal pressure of the pneumatic tire 32 to the pressure set in the pneumatic tire 32, workability is further improved.

1 is a schematic configuration diagram of a sealing / pump-up device according to a first embodiment of the present invention. It is sectional drawing which shows the principal part of a switching valve. It is a schematic block diagram of the sealing and pump-up apparatus which concerns on the 2nd Embodiment of this invention. It is a schematic block diagram of the sealing pump-up apparatus which concerns on the 3rd Embodiment of this invention. It is a schematic block diagram of the sealing pump-up apparatus which concerns on the 4th Embodiment of this invention.

Explanation of symbols

10 Sealing / pump-up device 12 Compressor unit (Air supply source)
22 Relief valve (switching means)
26 Liquid container (Liquid supply source)
28 Switching valve (switching means)
30 Joint hose (gas-liquid supply piping)
32 Pneumatic tire 58 Pilot operated switching valve (switching means)
64 4 port 2 position switching valve (switching means)
68 Pressure sensor 70 Control device

Claims (3)

A liquid supply source that contains a sealing agent and has an air inflow portion and a sealing agent discharge portion;
An air source for generating compressed air;
A gas-liquid supply pipe provided with a connecting portion capable of being connected to a valve of a pneumatic tire on one end side;
The air supply source communicates with the other end of the gas-liquid supply pipe until a predetermined pressure is reached, and when the pressure exceeds the specified pressure, the air supply source and the liquid supply source flow in. And a switching means for communicating the discharge part of the liquid supply source and the other end side of the gas-liquid supply pipe,
A sealing / pump-up device.   The sealing / pump-up device according to claim 1, wherein the switching unit includes a switching valve that switches a flow path based on the pressure on the air supply source side. The switching means includes a pressure sensor for detecting the pressure on the air supply source side,
An electromagnetically operated switching valve for switching the flow path;
A control device for operating the switching valve based on a pressure detection signal from the pressure sensor;
The sealing / pump-up device according to claim 1, comprising:

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