JP2008126579A - Sealant injection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealant injection device which surely protects a sealant from generating clogging caused by solidification thereof in a supply passage and can seal a blowout hole in a short time. <P>SOLUTION: A sealant injection device 10 is provided for injecting a liquid sealant in a flattened pneumatic tire 14 using compressed air. The device has an injection rate control part 13 for controlling the sealant injection rate within a prescribed range by controlling the pressure of the compressed air. The sealant has such a property as to solidify by receiving a shearing force and deforming: the greater the shearing force is, the faster the sealant solidifies. The shearing force is applied to the sealant in the supply passage, particularly at a tire valve 16 when the sealant is injected in the pneumatic tire 14. Accordingly, the range of the shearing force to be applied to the sealant in the supply passage can be controlled by controlling the range of the sealant injection rate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sealing agent injection device that injects a sealing agent for sealing a punctured pneumatic tire into the pneumatic tire.

  In recent years, when a pneumatic tire (hereinafter simply referred to as “tire”) is punctured, a sealing agent that repairs the tire with a sealing agent and pumps the internal pressure up to a predetermined reference pressure without replacing the tire and the wheel. An injection device (also referred to as a sealing / pump-up device) has become widespread (see, for example, Patent Document 1).

  As the sealing agent injection device as described above, for example, there is a sealing agent injection device including a liquid agent container that stores a liquid sealing agent and an injection unit to which the liquid agent container is attached. In this sealing agent injection device, an air supply path that can be connected to an air supply source such as an air compressor via an internal space of the liquid agent container and a gas-liquid supply path that can be connected to a pneumatic tire as a sealing object are mutually connected. The air supply path and the gas-liquid supply path are respectively provided in the injection unit.

  When repairing a pneumatic tire punctured with this sealing agent injection device, when an air supply source such as an air compressor is operated, compressed air is guided from the air inlet to the liquid agent container via the air supply path, and It passes through the sealing agent and gathers in a space (air layer) above the boundary surface of the sealing agent. Thereby, the sealing agent is pressurized by the compressed air in the air layer, and after the pressurized sealing agent is injected into the pneumatic tire through the gas-liquid supply path, a prescribed amount of the sealing agent is injected, The tire is pumped up by supplying compressed air into the tire through the liquid container and the gas-liquid supply path.

By the way, it is more preferable that the sealing agent is solidified in a flow path such as a gas-liquid supply path to reliably prevent clogging and close the puncture hole in a short time.
JP 2006-152239 A

  In consideration of the above-described facts, the present invention provides a sealing agent injecting apparatus that can reliably prevent clogging caused by solidification of a sealing agent in a flow path and can close a puncture hole in a short time. This is the issue.

  The invention described in claim 1 is a sealing agent injecting device for injecting a liquid sealing agent with a pressurized gas into a punctured pneumatic tire, and the flow of the sealing agent is controlled by controlling the pressure of the pressurized gas. A flow rate control means for controlling the flow rate of the sealing agent in the flow path cross-sectional area minimum portion in the path to be within a predetermined range is provided.

  The sealing agent has a property of solidifying by being deformed by receiving a shearing force, and the rate of solidifying is faster as the shearing force is received. This shearing force is applied in the flow path when the sealing agent is injected into the pneumatic tire, and becomes maximum in the flow path cross-sectional area minimum portion of the flow path. Therefore, by controlling the range of the flow rate of the sealing agent in the channel cross-sectional area minimum portion, the range of the maximum shear force that the sealing agent receives in the channel can be controlled.

Therefore, by controlling the upper limit value of the flow rate of the sealing agent, it is possible to control the upper limit value of the maximum shear force received by the sealing agent in the flow path, so that the sealing agent is surely solidified in the flow path. Can be prevented.
In addition, by controlling the lower limit value of the flow rate of the sealing agent, the lower limit value of the maximum shear force received by the sealing agent in the flow path can be controlled, so that the sealing agent is easily solidified to some extent in the flow path. Can be. Accordingly, the time required for the sealing agent in the vicinity of the puncture hole in the tire to solidify can be shortened.

  The flow rate control means may be controlled continuously or intermittently. The sealing agent may be a natural rubber type or a synthetic rubber type, and is not particularly limited. According to the type of the sealing agent, the flow rate control means controls the pressure of the pressurized gas, thereby the sealing agent. It is further preferable to control the injection rate of the liquid.

  The invention described in claim 2 is characterized in that a compressor for supplying pressurized gas is provided, and the flow rate control means controls the pressure of the pressurized gas by controlling the output of the compressor. Thereby, an excessive load is not applied to the compressor.

The invention according to claim 3 is characterized in that the flow rate control means controls the output of the compressor in accordance with the temperature of the sealing agent.
In the third aspect of the invention, as described above, the flow rate of the sealing agent is controlled by controlling the output of the compressor in accordance with the temperature of the sealing agent. Therefore, in particular, a sealing agent whose solidification rate fluctuates due to temperature fluctuations is injected. Even in this case, the solidification rate can be controlled with high accuracy. The temperature of the sealing agent is usually the same as the use environment temperature of the sealing agent injection device.

The invention according to claim 4 is characterized in that the flow path cross-sectional area minimum portion is a tire valve of the pneumatic tire.
In the invention according to claim 4, the upper limit value of the injection rate of the sealing agent is set by the upper limit value of the flow velocity in the tire valve.

The invention according to claim 5 is characterized in that after injecting the sealing agent, compressed air is fed into the pneumatic tire to increase the internal pressure of the pneumatic tire.
Thereby, after injection | pouring of a sealing agent, a pneumatic tire can be pumped up to predetermined internal pressure as it is, and workability | operativity is good.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the sealing agent injection | pouring apparatus which can avoid reliably that a sealing agent solidifies in a flow path and a clogging arises, and can block | close a puncture hole for a short time.

Hereinafter, a sealing agent injection device according to an embodiment of the present invention will be described.
FIG. 1 shows a sealing agent injection device according to an embodiment of the present invention. The sealing agent injection 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. This is a so-called integrated device that re-pressurizes (pumps up) the internal pressure to a predetermined reference pressure.

As shown in FIG. 1, the sealing agent injection device 10 includes a compressor unit 12. The compressor unit 12 includes a motor, an air pump, a power circuit, and the like. A power cable (not shown) extending to the outside is provided. 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 the reference pressure defined for each type of the tire 14 to be repaired by the air pump.
Further, the compressor unit 12 is provided with a flow rate control unit 13 that controls the flow rate of a sealing agent in a tire valve 16 described later within a predetermined range by controlling the pressure of the compressed air. In the present embodiment, the smallest portion of the cross-sectional area of the sealing agent flow path is the tire valve 16, and the flow rate of the sealing agent is maximum in the tire valve 16.

  As shown in FIG. 2, the sealing agent injection device 10 is provided with a liquid agent container 18 containing a sealing agent 32 and an injection unit 20 to which the liquid agent container 18 is fused. A substantially cylindrical neck 26 protruding downward is integrally formed at the lower end of the liquid container 18. The neck portion 26 is formed to have a smaller diameter than the container main body portion above it. An aluminum seal 30 for sealing the sealing agent 32 in the liquid container 18 is disposed at the opening (lower end) of the neck portion 26.

  Here, the liquid container 18 is molded from various resin materials having gas barrier properties and metal materials such as aluminum alloys. The liquid agent container 18 is filled with a slightly larger amount of the sealing agent 32 than a prescribed amount (for example, 200 g to 400 g) according to the type, size, etc. of the tire 14 to be repaired by the sealing agent injection device 10.

  In the liquid agent container 18 of the present embodiment, as shown in FIG. 2, the sealing agent 32 is filled without a space without providing a space, but the alteration of the sealing agent 32 due to oxidation, nitridation, or the like is prevented. Therefore, a little amount of an inert gas such as Ar may be enclosed in the liquid container 18 together with the sealing agent 32 at the time of shipment.

  In the sealing agent injection device 10, when the liquid agent container 18 is set upright above the injection unit 20, the sealing agent 32 in the liquid agent container 18 is pressed against the aluminum seal 30 of the liquid agent container 18 by its own weight.

  As shown in FIG. 2, the injection unit 20 is provided with a unit main body 34 formed in a substantially cylindrical shape and a plate-like leg portion 36 extending from the lower end portion of the unit main body 34 to the outer peripheral side. Yes. On the upper part of the unit main body 34, a part of the neck portion 26 of the liquid agent container 18 is fused in a pressed state.

A substantially cylindrical pressurized liquid supply chamber 40 that communicates with the inside of the liquid agent container 18 when the aluminum seal 30 is pierced is provided in the unit main body 34. Specifically, as shown in FIG. 2, the shape of the pressurized liquid supply chamber 40 is formed such that the right side of the drawing from the center of the pressurized liquid supply chamber 40 is deeper than the left side of the drawing.
In the center of the injection unit 20, a jig insertion hole 42 having a circular cross section extending in the vertical direction from the lower surface toward the pressurized liquid supply chamber 40 is formed.

  Further, the sealing agent injection device 10 is provided with a pressure-resistant hose 44 extending from the compressor unit 12 as shown in FIG. 1, and extended from the injection unit 20 as shown in FIG. A pressure pipe 48 is provided that is detachably connected to the pressure-resistant hose 44 via 46. The base end of the pressure hose 44 is connected to an air pump in the compressor unit 12, and the compressed air generated by the air pump is supplied to the pressure hose 44 side when the compressor unit 12 is operated. Further, the distal end portion of the pressure pipe 48 passes through the peripheral wall portion of the unit main body 34 and opens at an intermediate portion of the jig insertion hole 42 extending in the vertical direction.

  In the jig insertion hole 42, the shaft portion 50A of the piercing member 50 is inserted on the pressurized liquid supply chamber 40 side. The piercing member 50 includes a disc-shaped piercing portion 50B that expands radially outward in the upper end portion of the shaft portion 50A. A plurality of blades 50C for easily breaking through the aluminum seal 30 are formed on the upper surface of the perforated part 50B.

A pair of O-ring grooves 56 is formed in the shaft portion 50 </ b> A, and an O-ring 58 is fitted in each O-ring groove 56.
The entire shaft portion 50A is inserted into the jig insertion hole 42, and the distal end portion of the pressure pipe 48 is closed between the O-ring 58 and the O-ring 58 of the shaft portion 50A.

  Further, the shaft portion 50 </ b> A is held inside the jig insertion hole 42 by friction between the O-ring 58 and the inner peripheral surface of the jig insertion hole 42. In this state, the perforated part 50 </ b> B faces the center of the front surface of the aluminum seal 30, and a slight gap is provided between the perforated part 50 </ b> B and the aluminum seal 30.

  Further, the sealing agent injection device 10 is provided with a joint hose 54 whose base end portion is connected to the unit main body 34 via a nipple 52. As shown in FIG. 2, the joint hose 54 communicates with the inner surface on the lower end side in the pressurized liquid supply chamber 40 through the nipple 52. As shown in FIG. 1, a valve adapter 76 that is detachably connected to the tire valve 16 of the tire 14 is provided at the distal end portion of the joint hose 54.

(Jig)
Next, the jig 60 used when discharging the sealing agent 32 from the sealing agent injection device 10 will be described.

  As shown in FIG. 2, the jig 60 includes a rod-shaped insertion portion 60A and a disk-shaped base portion 60B formed integrally with one end of the insertion portion 60A.

  The insertion portion 60A is formed with a first passage 62 extending from the tip opposite to the base portion side toward the base portion side, and penetrates from the base side end of the first passage 62 to the outer periphery. A plurality of second passages 64 are formed. An annular groove 66 serving as an air passage is formed in the opening portion of the second passage 64 on the outer peripheral surface of the insertion portion 60A, and a pair of O-ring grooves 68 are formed on both sides of the groove 66. Yes. An O-ring 70 is fitted in the O-ring groove 68.

  In addition, in the jig 60 of this embodiment, although the front-end | tip of 60 A of insertion parts inclines so that it cut off diagonally, you may be right-angled with respect to an axial direction.

Distance L ₁ from the base portion 60B of the jig 60 to the tip of the first passage 62 (as shown in FIG. 2, when the opening of the first passage 62 is inclined, the end on the base portion side in the opening) Is set shorter than the distance L ₀ from the lower surface of the leg portion 36 of the sealing agent injection device 10 to the inner upper wall surface of the liquid agent container 18.

Further, the distance L ₃ from the base portion 60 B of the jig 60 to the center of the second passage 64 is set to the same dimension as the distance L ₄ from the lower surface of the leg portion 36 of the sealing agent injection device 10 to the center portion of the pressure pipe 48. Has been.

(Flow rate control unit)
Next, the flow rate control unit 13 (see FIG. 1) built in the compressor unit 12 will be described.

  In the present embodiment, the compressor unit 12 is provided with a thermistor, and the flow rate control unit 13 is provided with an output control circuit (not shown). With this configuration, the flow rate controller 13 controls the pressure of the compressed air for each temperature region (for example, −20 to 0 ° C., 0 to 15) so that the sealing agent 32 is injected at an appropriate injection speed at the temperature of the usage environment. At four temperature ranges of 15 ° C., 15 to 35 ° C., and 35 to 50 ° C.).

  In the present embodiment, the flow velocity control unit 13 controls the output of the compressor unit 12 as follows.

  In the storage unit (not shown) of the flow rate control unit 13, as shown by a line J in FIG. 4, the injection speed of the sealing agent 32 and the good sealing performance of the puncture hole (for example, how much sealing agent is in the puncture hole) (Hereinafter, this relationship is referred to as a sealing property relationship) is input. Similarly, as shown by line K in FIG. 4, the relationship between the injection rate of the sealing agent and the difficulty of clogging in the tire valve 16 (for example, how much latex adhered to the tire valve 16 is small) This relationship is also called “difficulty relationship”. The horizontal axis and vertical axis of the line J are the lower axis and the left axis, respectively, and the horizontal axis and vertical axis of the line K are the lower axis and the right axis, respectively. FIG. 4 shows that the better the sealing performance and the harder the clogging, the better the numerical value increases, that is, the higher the value on the vertical axis. As can be seen from FIG. 4, the higher the injection rate, the better the sealing property, and the lower the injection rate, the better the clogging relationship.

  Furthermore, a performance curve N drawn in consideration of both the sealing property relationship and the clogging difficulty relationship is stored in the storage unit of the flow rate control unit 13. This performance curve N has a property of moving mainly in the left-right direction in FIG. 4 depending on the temperature. Therefore, the flow rate control unit 13 sets the allowable range of the injection rate of the sealing agent 32 (the allowable range of injection rate R in the hatched region in FIG. 4) in consideration of the moving range of the performance curve N in each temperature range. . This allowable injection rate range R is a range in which it is possible to reliably avoid clogging due to solidification of the sealing agent at the tire valve 16 and to close the puncture hole in a short time.

  Furthermore, the flow rate control unit 13 sets an appropriate injection speed in the injection speed allowable range R, and controls the output of the compressor unit 12 so that the sealing agent 32 is injected at the injection speed. The appropriate injection speed is an injection speed at which the flow rate of the sealing agent 32 in the tire valve 16 is an appropriate flow rate.

  For example, as shown in Table 1, the output of the compressor unit 12 is 100% of the maximum output when the temperature region (air temperature) is in the range of -20 to 0 ° C, and 70% in the range of 0 to 15 ° C. The output is controlled by the flow rate control unit 13 at 50% in the range of ° C and 30% in the range of 35 ° C or higher.

なお、表１に示したように、シーリング剤は、温度が高くなるほど固化し易い場合が多い。従って、温度が高いほどコンプレッサユニット１２の出力を低下させることが多く、これにより、コンプレッサユニット１２が高温になり過ぎることが防止される。

In addition, as shown in Table 1, the sealing agent tends to solidify as the temperature increases. Therefore, the higher the temperature, the lower the output of the compressor unit 12 is often reduced, thereby preventing the compressor unit 12 from becoming too hot.

(Operation of sealing agent injection device)
Next, an operation procedure for repairing the punctured tire 14 using the sealing agent injection device 10 according to the present embodiment will be described.

  When puncture occurs in the tire 14, first, the operator screws the valve adapter 76 of the joint hose 54 onto the tire valve 16 of the tire 14 and passes the pressurized liquid supply chamber 40 through the joint hose 54 into the tire 14. To communicate.

Next, the operator inserts the insertion portion 60 </ b> A of the jig 60 into the jig insertion hole 42 of the sealing agent injection device 10 and abuts the base portion 60 </ b> B of the jig 60 against the leg portion 36 of the sealing agent injection device 10. As a result, the piercing part 50B of the piercing member 50 pushed by the insertion part 60A breaks through the aluminum seal 30 and is pushed into the container, and the insertion part 60A enters the container.
Thereafter, the sealing agent injection device 10 is disposed, for example, on the road surface so that the leg portion 36 is downward and the liquid agent container 18 is upward.

  When the insertion portion 60A of the jig 60 is inserted into the jig insertion hole 42 of the sealing agent injection device 10, the distal end of the insertion portion 60A is positioned near the inner upper wall surface of the liquid agent container 18 as shown in FIG. The sealing agent 32 in the container flows out into the pressurized liquid supply chamber 40 through an annular gap between the hole 30A and the insertion portion 60A. As a result, a space 72 corresponding to the volume of the sealing agent 32 that has flowed out into the pressurized liquid supply chamber 40 is formed in the upper portion of the container, and the end of the first passage 62 that opens to the tip of the insertion portion 60A is sealed. It can be positioned above the liquid level of the agent 32.

  Then, the compressor unit 12 is operated while holding the injection unit 20 and the liquid agent container 18 such that the liquid agent container 18 is positioned above the injection unit 20 as shown in FIG. The compressed air generated by the compressor unit 12 is supplied to the liquid agent container 18 through the pressure hose 44, the pressure pipe 48, the second passage 64 of the jig 60, and the first passage 62. As described above, since the end portion of the first passage 62 is located above the liquid surface of the sealing agent 32, the compressed air does not float as bubbles in the sealing agent 32.

  When compressed air is supplied into the container, the volume of the space 72 formed in the upper part of the container is expanded to pressurize the sealing agent 32, and the pressurized sealing agent 32 is a hole formed in the aluminum seal 30. It is supplied into the pneumatic tire 14 through the pressurized liquid supply chamber 40 and the joint hose 54 through an annular gap between 30A and the insertion portion 60A.

  At that time, the flow rate control unit 13 is injected with the sealing agent 32 at an appropriate injection rate according to the use environment temperature (that is, the flow rate of the sealing agent 32 in the tire valve 16 becomes an appropriate value). The air pressure of the compressed air is controlled by controlling the output of the compressor unit 12. Therefore, clogging of the sealing agent in the tire valve 16 is reliably avoided, and a shearing force is applied to the sealing agent 32 so that the sealing agent 32 is easily solidified to some extent.

  After all the sealing agent 32 in the container is discharged, the sealing agent 32 in the pressurized liquid supply chamber 40 is pressurized and supplied into the pneumatic tire 14 through the joint hose 54.

  Thereafter, when the entire amount of the sealing agent 32 is discharged from the sealing agent injection device 10, the compressed air is supplied into the tire 14 via the liquid agent container 18, the pressurized liquid supply chamber 40, and the joint hose 54.

  Next, when the operator confirms that the internal pressure of the tire 14 has become the specified pressure by the pressure gauge 78 provided in the compressor unit 12, the operator stops the compressor unit 12 and removes the valve adapter 76 from the tire valve 16. Remove.

  The worker travels preliminarily for a certain distance using the tire 14 into which the sealing agent 32 has been injected within a certain time after the completion of the inflation of the tire 14. As a result, the sealing agent 32 is uniformly diffused inside the tire 14, and the sealing agent 32 is filled in the puncture hole to close the puncture hole. Here, as described above, when the sealing agent 32 passes through the tire valve 16, a shearing force is applied by the control of the flow rate control unit 13 so that the sealing agent 32 is easily solidified to some extent. The sealing agent 32 is solidified and blocked at the puncture hole in a short time.

  After completion of the preliminary travel, the operator re-measures the internal pressure of the tire 14, screwing the valve adapter 76 of the joint hose 54 to the tire valve 16 again as necessary, and restarting the compressor unit 12 to remove the tire 14. Pressurize to the specified internal pressure. Thereby, the puncture repair of the tire 14 is completed, and the tire 14 can be used to travel at a constant speed or less (for example, 80 km / h or less) within a certain distance range.

  As described above, in the sealing agent injection device 10 of the present embodiment, the sealing agent 32 can be injected into the pneumatic tire 14 at an appropriate injection speed by the flow rate controller 13. Thereby, since the maximum flow velocity of the sealing agent 32 becomes an appropriate value in the tire valve 16, it can be reliably avoided that the sealing agent is solidified and clogged in the tire valve 16 where the sealing agent 32 receives the maximum shearing force. And a puncture hole can be plugged up in a short time.

Moreover, the compressor unit 12 which supplies compressed air is provided, and the flow-rate control part 13 is performing output control of the compressor unit 12 according to temperature. This makes it possible to control the solidification rate with high accuracy even when injecting the sealing agent 32 whose solidification rate varies greatly depending on the temperature.
Further, since the air is not passed through the sealing agent 32 when the sealing agent 32 in the container is discharged, the sealing agent 32 can be quickly supplied into the tire.

  Further, at the time of storage, the liquid agent container 18 is sealed with the aluminum seal 30, the jig insertion hole 42 is closed with the piercing member 50, and the pressure pipe 48 and the pressurized liquid supply chamber 40 are hermetically sealed. The foreign material can be prevented from entering the flow path, and the sealant 32 can be discharged by a simple operation of pushing the jig 60 into the jig insertion hole 42 during use.

  In this embodiment, the flow rate control unit 13 stores the performance curve N. However, the flow rate control unit 13 does not store the performance curve N and calculates the allowable injection rate range R from the line J and the line K. It is also possible to configure the setting.

<Test example>
In order to confirm the effect of the present invention, the inventor changed the injection speed of the sealing agent 32 as a parameter by controlling the output of the compressor unit 12 in the sealing agent injection device 10 of the above embodiment, and (1) The good sealing performance of the puncture holes by the sealing agent 32 and (2) the difficulty of clogging the sealing agent (latex) in the tire valve 16 were measured, and performance evaluation was performed. In this test example, the tire valve 16 is a snap-in valve defined by 2006 JATMA, and the environmental temperature is 25 ° C.

  Table 2 shows the injection rate of the sealing agent 32 and the evaluation values of the good sealing performance and the difficulty of clogging the latex at each injection rate. In the evaluation values shown in Table 2, the higher the numerical value, the better the performance.

（１）シール性については、注入後、１ｋｍ以内の走行でパンク孔が完全に塞がれたときを評価値４、１〜３ｋｍの走行でパンク孔が完全に塞がれたときを評価値３、３〜５ｋｍの走行でパンク孔が完全に塞がれたときを評価値２、５ｋｍ以上の走行でパンク孔が完全に塞がれたときを評価値１とした。なお、走行速度は何れの場合も同じである。

(1) For the sealing performance, the evaluation value is 4 when the puncture hole is completely closed after running within 1 km after the injection, and the evaluation value is when the puncture hole is completely closed after running 1 to 3 km. An evaluation value of 2 was obtained when the puncture hole was completely blocked by running from 3 to 3 km, and an evaluation value of 1 was assigned when the puncture hole was completely blocked by running of 5 km or more. The traveling speed is the same in any case.

  (2) About the difficulty of clogging latex, when the latex adhering to the valve core was 5 mg or less immediately after injection, the evaluation value was 4 to 5 to 20 mg and the evaluation value was 3 to 20 mg. The evaluation value was 2, and the evaluation value 1 was 40 mg or more.

  As can be seen from Table 2, the test results indicate that the injection rate of the sealing agent is preferably in the range of 8 to 30 cc / s, and more preferably in the range of 12 to 20 cc.

  The embodiments of the present invention have been described with reference to the embodiments. However, the above embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above embodiment.

It is a block diagram which shows the structure of the sealing agent injection | pouring apparatus which concerns on one Embodiment of this invention. It is side surface sectional drawing which shows the liquid agent container in the sealing agent injection | pouring apparatus shown by FIG. 1, the structure of an injection | pouring unit, and a jig. It is sectional drawing of the liquid agent container which inserted the jig, and an injection | pouring unit. In one Embodiment of this invention, it is a graph which shows the data memorize | stored in the flow-rate control part of the sealing agent injection | pouring apparatus.

Explanation of symbols

10 Sealant injection device 12 Compressor unit (compressor)
13 Flow rate control unit (flow rate control means)
14 Pneumatic tire 16 Tire valve 32 Sealing agent

Claims (5)

A sealing agent injection device for injecting a liquid sealing agent with pressurized gas into a punctured pneumatic tire,
A sealing agent characterized by comprising a flow rate control means for controlling the flow rate of the sealing agent in a flow passage cross-sectional area minimum portion of the sealing agent in a predetermined range by controlling the pressure of the pressurized gas. Injection device. A compressor for supplying pressurized gas is provided;
The sealing agent injection device according to claim 1, wherein the flow rate control means controls the pressure of the pressurized gas by controlling the output of the compressor.   The sealing agent injection device according to claim 2, wherein the flow rate control means controls the output of the compressor in accordance with the temperature of the sealing agent.   The sealing agent injection device according to any one of claims 1 to 3, wherein the flow path cross-sectional area minimum portion is a tire valve of the pneumatic tire.   The sealing agent injection device according to any one of claims 1 to 4, wherein after the sealing agent is injected, compressed air is supplied into the pneumatic tire to increase the tire internal pressure.

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