JP2012045987A - Tire booster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire booster capable of detecting a tire internal pressure without operating an air compressor.SOLUTION: A flat tire 14 and a liquid container 18 are connected with a joint hose 7, and the liquid container 18 and a pressurized air supply unit are connected with an air pipe 24. The air compressor 20 for pressurizing air is accommodated inside the pressurized air supply unit, and a tip of the air pipe 24 drawn to the pressurized air supply unit is connected to a discharge opening of the air compressor 20. In the air pipe 24, a reverse-current preventing valve 22 is attached for preventing reverse current, onto the side of the air compressor 20, of a sealing agent which is stored in the liquid container 18. A pressure gauge 16 which detects a tire internal pressure is attached in the air pipe 24 between the reverse-current preventing valve 22 and the liquid container 18. A pressure transmission path, between a pressure detection section and a pressure receiving face of the pressure gauge 16 inserted into the air pipe 24, is filled with pressure transmission liquid for transmitting pressure.

Description

  The present invention relates to a tire booster.

  The tire pressure increasing device injects a sealing agent stored in a liquid agent container with pressurized air from an air compressor into a punctured tire and closes the puncture hole with the sealing agent to repair the puncture. At this time, work is performed while checking the tire internal pressure with a pressure gauge.

  As shown in FIG. 5, in the conventional tire pressure increasing device 50, the liquid agent container 18 is disposed between the tire 14 and the air compressor 12, and the backflow of the sealing agent is prevented between the liquid agent container 18 and the air compressor 12. In this configuration, the valve check valve 22 is attached. The pressure gauge 16 is attached between the valve backflow prevention valve 22 and the air compressor 12. This prevents the backflowing sealing agent from entering the pressure gauge 16.

  Since puncture repair is expected to be performed in a bad environment such as outdoors or at night, a tire pressure booster that is easy to use is required. For this reason, for example, a pressure gauge that is easy to view has been proposed (Patent Document 1).

  That is, as shown in FIG. 6, the pressure gauge 16 of the tire pressure increasing device of Patent Document 1 is a transparent plate that first protects the pointer 80 when the pointer 80 is displaced from the initial position (0 position of the scale 86A). 98 is removed from the pressure gauge main body 82. Next, the screw 94 is loosened, and in this state, the scale plate 86 is rotated around the shaft member 84 of the pointer 80 so that the pointer 80 points to the 0 position of the scale 86A. The scale plate 86 is fixed by tightening the screw member 94 at a position where the pointer 80 matches the 0 position of the scale 86A. Thereby, the pressure gauge 16 that is easy to see is provided.

  However, since the pressure gauge 16 is attached to the air compressor 12 side of the sealing agent backflow prevention valve 22, the tire internal pressure cannot be detected unless the air compressor 12 is operated.

JP-A-8-309880

  In view of the above fact, an object of the present invention is to provide a tire pressure increasing device that can detect a tire internal pressure without operating an air compressor.

  A tire pressurizing device according to the invention of claim 1 is provided between a repair liquid container in which a repair liquid for puncture repair is stored and a pressurized air supply means for supplying pressurized air. A first pipe that is sent to the repair liquid container; a second pipe that is provided between the repair liquid container and the tire; and that transports the repair liquid to the tire; and is provided on the first pipe, and the repair liquid Pressure detection means for detecting the internal pressure of the tire, which is attached between the backflow prevention means and the repair liquid container of the first pipe material or the second pipe material, and prevents backflow prevention means for preventing movement to the pressurized air supply means side. And a pressure transmission path that is provided between the pressure receiving surface of the pressure detecting means and the pressure detecting unit and is filled with a pressure transmitting liquid that transmits the pressure of the pressure receiving surface to the pressure detecting unit. It is said.

  According to the first aspect of the present invention, the pressurized air supplied from the pressurized air supply means is conveyed to the repair liquid container by the first pipe material. By this pressurized air, the repair liquid for puncture repair stored in the repair liquid container is pushed out and injected into the tire through the second pipe. At this time, the backflow prevention means attached to the first pipe member prevents the backflow of the repair liquid to the pressurized air supply means side.

Moreover, a pressure detection means is attached between the backflow prevention means of the first pipe material and the repair liquid container, or the second pipe material, and the tire internal pressure is detected by the pressure detection means. A pressure transmission path is provided between the pressure receiving surface of the pressure detection means and the pressure detection unit. The pressure transmission path is filled with a pressure transmission liquid that transmits the tire internal pressure. Since the pressure transmission liquid is already filled, the repair liquid does not enter the pressure transmission path.
As a result, the tire pressure can be detected by the pressure detection means without operating the pressurized air supply means.

  According to a second aspect of the present invention, in the tire pressure increasing device according to the first aspect, the pressure receiving surface protrudes from the first pipe or the second pipe by a protrusion amount H, and the protrusion amount H Is in the range of 0 <H ≦ 2 mm.

According to the second aspect of the present invention, the pressure receiving surface of the pressure detecting means protrudes to the inside of the first tube material or the second tube material by 2 mm or less.
Thereby, adhesion of the repair liquid to the pressure receiving surface and solidification of the repair liquid are suppressed, and the influence on the detection of the tire internal pressure can be reduced.

  A third aspect of the present invention is the tire booster according to the first or second aspect, wherein the pressure transmission path has an inner diameter D1 of the pressure receiving surface of 2 mm or less, and the axis of the pressure transmission path on the pressure receiving surface. Is characterized by being orthogonal to the axis of the first tube material or the second tube material.

That is, since the inner diameter D1 of the pressure transmission path at the pressure receiving surface is 2 mm or less, it is possible to suppress the pressure transmission liquid filled in the pressure transmission path from leaking out due to the surface tension.
Further, the axis of the pressure transmission path is provided orthogonal to the axis of the first tube or the second tube, and the influence of the dynamic pressure of the fluid inside the tube can be avoided.

  According to a fourth aspect of the present invention, in the tire pressure increasing device according to the first aspect, the first pipe member or the second pipe member is formed with a connection portion to which the pressure detecting means is connected, and the connection portion is provided with the connection portion. Is provided with an insertion hole into which the insertion portion having the pressure receiving surface is inserted, and a communication path that connects the inside of the pipe material and the insertion hole, and the pressure receiving surface from the communication path side end of the communication path and the insertion hole. The pressure transmission liquid is filled in between, and the ratio R (D2 / D3) of the inner diameter D2 of the communication path and the inner diameter D3 of the insertion hole of the pipe is in the range of 0.1 to 1.0. It is a feature.

According to invention of Claim 4, a pressure detection means is connected to the connection part formed in the 1st pipe material or the 2nd pipe material. An insertion portion having a pressure receiving surface is inserted into the insertion hole of the connection portion. The inner side of the tube and the insertion hole communicate with each other through a communication path, and a pressure transmission liquid is filled between the communication path and the end of the communication hole on the side of the communication path from the pressure receiving surface.
Further, the ratio R (D2 / D3) between the inner diameter D2 of the communication path and the inner diameter D3 of the insertion hole is in the range of 0.1 to 1.0.

  Thereby, the pressure transmission liquid with which it filled between the pressure-receiving surface from the communicating-path side edge part of a communicating path and an insertion hole can transmit the pressure of a 1st pipe material or a 2nd pipe material to a pressure-receiving surface. Further, since the inner diameter D2 of the communication path is equal to or smaller than the inner diameter D3 of the insertion hole, leakage of the pressure transmission liquid from the communication path can be suppressed.

  According to a fifth aspect of the present invention, in the tire pressure increasing device according to any one of the first to fourth aspects, the pressure transmission liquid is a hydrophobic liquid having a surface tension of more than 72.75 mN / m. It is characterized by.

That is, the pressure transmission liquid is a hydrophobic liquid having a surface tension greater than that of water. Examples of such liquid include silicon oil and glycerin.
Thereby, the penetration of the sealing agent into the pressure transmission part and the leakage of the pressure transmission liquid filled in the pressure transmission path can be suppressed.

  Since the present invention is configured as described above, it is possible to provide a tire booster that can detect the tire internal pressure without operating the air compressor.

It is a figure which shows the basic composition of the tire pressure | voltage rise apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the basic composition of the liquid agent container used with the tire pressure | voltage rise apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the basic composition and attachment part of the pressure gauge of the tire pressure | voltage rise apparatus which concern on the 1st Embodiment of this invention. It is a figure which shows the basic composition of the tire pressure | voltage rise apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the basic composition of the tire pressure | voltage rise apparatus of a prior art example. It is a figure which shows the basic composition of the display part of the pressure gauge of the tire booster of a prior art example.

(First embodiment)
As shown in FIG. 1, the tire booster 10 according to the first embodiment is used during puncture repair. FIG. 1A is a perspective view illustrating an assembled state of the tire pressure increasing device 10, and FIG. 1B is a diagram illustrating a connection state of main components.

  In the tire pressure increasing device 10, the punctured tire 14 and the liquid agent container 18 are connected by a joint hose 78, and the liquid agent container 18 and the pressurized air supply unit 12 are connected by an air pipe 24. On the upper surface of the pressurized air supply unit 12, a display unit of a pressure gauge 16 that detects tire internal pressure and an operation unit of an operation switch 26 that controls the operation of the air compressor 20 are attached.

The tire pressure increasing device 10 is stored in a dedicated storage box and stored in the vehicle except during puncture repair. Hereinafter, the present embodiment will be described in a configuration that is assembled in a state where puncture repair is possible.

  As shown in FIG. 1B, an air compressor 20 that supplies pressurized air is housed inside the pressurized air supply unit 12, and an air pipe 24 that is drawn into the pressurized air supply unit 12. The tip and the pressurized air discharge port of the air compressor 20 are connected. A backflow prevention valve 22 is attached to the air pipe 24 to prevent a backflow of a later-described sealing agent 34 stored in the liquid agent container 18 toward the air compressor 20.

  A pressure gauge 16 for detecting the pressure of the tire 14 is attached between the backflow prevention valve 22 of the air pipe 24 and the liquid agent container 18. Thereby, at the time of puncture repair, the operation of the air compressor 20 can be controlled while checking the tire internal pressure.

Next, the liquid agent container 18 will be described.
FIG. 2 shows a cross-sectional view of the liquid container 18 set in a state where puncture repair can be started. The liquid agent container 18 is a cylindrical body with one end opened, and an amount of the sealing agent 32 necessary for one puncture repair is stored inside. The liquid container 18 is arranged with the opening 18E facing downward, and an injection unit 46 is connected and fixed to the lower part of the opening 18E.

A connecting portion 54 provided with a passage serving as an outlet of the sealing agent 32 is attached to the injection unit 46 outward. A liquid agent unit 48 is constituted by the liquid agent container 18 and the injection unit 46.
One end of the joint hose 78 is connected to the tip of the connection portion 54 with a nipple 56, and the sealing agent 32 is sent from the connection portion 54 toward the tire 14.

  An unsealing device 60 is attached to the lower part of the liquid agent unit 48. At the center of the opening device 60, there is provided a breaching tool 64 that breaks through a sealing material that closes the opening 18E of the liquid agent container 18. FIG. 2 shows a state where the sealing material has already been pierced. The breaching tool 64 projects through the injection unit 46 to the opening 18E. An air passage 62 is provided through the inside of the breaching tool 64, and one end of the air passage 62 is opened inside the sealing agent 34.

  The other end of the air passage 62 is connected to an air injection pipe 52 that projects from the side wall of the opening device 60. The air tube 24 is inserted into the air injection tube 52, and pressurized air is injected.

  Thus, the pressurized air sent by the air pipe 24 is injected from the air injection pipe 52 through the air passage 62 into the liquid container 18 from the tip of the air passage 62. The bottom surface of the opening device 60 is fixed to the housing 90 of the pressurized air supply unit 12 with screws 88.

Next, the pressure gauge will be described.
As shown in FIG. 3A, the pressure gauge 16 is inserted into and fixed to a connecting portion (pressure extracting portion) 28 provided in the air pipe 24. As a method for fixing the pressure gauge 16, the inner circumference of the connection portion 28 and the outer circumference of the pressure gauge 16 are preliminarily threaded and screwed. In addition, the connection part 28 and the pressure gauge 16 may be connected by a connection hose.

  The pressure gauge 16 is a Bourdon tube pressure gauge, and a Bourdon tube 40 is provided therein. One end of the Bourdon tube 40 is opened at the pressure receiving surface 17, and the other end is closed and is in contact with the pressure detection unit. Thereby, the pressure of the pressure receiving surface 17 is transmitted to the pressure detection unit, and the display unit attached to the pressure detection unit displays the detected pressure.

  The Bourdon tube 40 is filled with a pressure transmission liquid 42. The pressure transmission liquid 42 is preferably a hydrophobic liquid having a surface tension greater than 72.75 mN / m, and for example, silicon oil, glycerin, and the like are conceivable. The inner diameter D1 of the Bourdon tube 40 on the pressure receiving surface 17 is desirably 2 mm or less. By appropriately selecting the pressure transmission liquid 42, the pressure transmission liquid 42 does not leak from the Bourdon tube 40 due to surface tension.

Further, the pressure receiving surface 17 of the pressure gauge 16 is attached to the inside of the air pipe 24 so as to protrude so that the protruding amount H is in the range of 0 <H ≦ 2 mm. Thereby, adhesion of the sealing agent 34 to the pressure receiving surface 17 of the pressure gauge 16 and solidification of the adhering sealing agent 34 are suppressed, and the influence on pressure detection can be reduced.

Thereby, since the pressure transmission liquid 42 is already filled in the Bourdon tube 40, the sealing agent 34 cannot enter the Bourdon tube 40 at the time of puncture repair. At this time, the pressure gauge 16 can detect the tire internal pressure via the pressure transmission liquid 42.
Further, since the inner diameter D1 of the tip of the Bourdon tube 40 on the air tube 24 side is made as thin as 2 mm, the pressure transmission liquid 42 does not leak due to the surface tension.

Next, the operation of the present embodiment will be described.
First, when the assembly of the tire booster shown in FIG. 1 is completed, the power switch 26 of the air compressor unit 12 is turned on to operate the air compressor 20. As a result, the pressurized air supplied from the air compressor 20 is supplied to the liquid container 18 through the air pipe 24. As shown in FIG. 2, the pressurized air passes through the air passage 62, floats upward in the liquid agent container 18, rises and is stored in the upper part of the liquid agent container 18, and forms an air layer G.

Next, the sealing agent 32 pressurized and pushed out by the air layer G is supplied to the inside of the tire 14 through the joint hose 78.
After all the sealing agent 32 is supplied to the inside of the tire 14 through the joint hose 78, the compressed air is supplied to the inside of the tire 14 via the liquid agent container 18 and the joint hose 78.

  Next, when it is confirmed by the pressure gauge 16 that the tire internal pressure has become the specified pressure, the compressor 20 is stopped and the valve adapter 70 is removed from the tire valve (not shown).

Thereafter, the vehicle travels preliminarily for a certain distance (for example, about 10 km) using the tire 14 injected with the sealing agent 32 within a certain time. Thereby, the sealing agent 32 is uniformly diffused in the tire inner surface inside the tire 14, and the puncture hole of the tire 14 is closed.
After the preliminary run, check the tire pressure again, and if there is no problem, finish the puncture repair.

  In the present embodiment, even if the operation switch 26 of the air compressor 12 is accidentally turned off or the air pressure remains in the tire during the puncture repair, the backflow prevention valve 22 is used as a sealing agent for the air compressor 12. 32 backflow is prevented. At this time, the Bourdon tube 40 of the pressure gauge 16 is filled with the pressure transmission liquid 42, and the sealing agent 32 can be prevented from entering the Bourdon tube 40.

As described above, according to the present embodiment, the pressure of the tire 14 can be detected by the pressure gauge 16 without operating the air compressor 12 during puncture repair.
As shown in FIG. 2 (B), similarly in the diaphragm type pressure gauge 58, the pressure receiving surface 17 of the pressure gauge 58 is attached to the connection portion 28 of the air pipe 24 so as to protrude into the air pipe 24. Also good. The protrusion amount H is preferably in the range of 0 <H ≦ 2 mm.

Then, by filling the pressure transmission path 40 from the pressure receiving surface 17 to the diaphragm with the pressure transmission liquid 42, the same operation and effect as the Bourdon tube pressure gauge described above can be obtained.
Further, as shown in FIG. 2C, a connection portion 68 provided with an insertion hole 66 of the pressure gauge 16 is formed in the air pipe 24, and the pressure receiving surface 17 of the pressure gauge 16 is formed inside the air pipe 24. It is good also as a structure which does not project directly.

  That is, the connection portion 68 formed in the air pipe 24 is provided with an insertion hole 66 into which the insertion portion having the pressure receiving surface 17 is inserted, and a communication passage 29 that allows the inside of the pipe material to communicate with the insertion hole 66. Then, the pressure transmission liquid 42 is filled between the communication passage 29 and the end portion of the insertion hole 66 on the communication passage 29 side.

Further, the ratio R (D2 / D3) between the inner diameter D2 of the communication passage 29 and the inner diameter D3 of the insertion hole 66 is set in the range of 0.1 to 1.0. At this time, the inner diameter D2 of the communication passage 29 is desirably 2 mm or less.
The pressure gauge 16 may be a Bourdon tube pressure gauge or a diaphragm pressure gauge.

  As a result, the pressure transmission liquid 42 filled between the communication passage 29 and the end portion of the insertion hole 66 on the communication passage 29 side can transmit the pressure of the air pipe 24 to the pressure reception surface 17. Then, the pressure on the pressure receiving surface 17 is transmitted to the pressure detecting unit through the Bourdon tube or the diaphragm inside the pressure gauge 16.

  Further, since the inner diameter D2 of the communication path 29 is equal to or smaller than the inner diameter D3 of the insertion hole 66, leakage of the pressure transmission liquid 42 from the communication path 29 can be suppressed.

  Note that the tip of the connection portion 68 on the air tube 24 side may protrude into the air tube 24 with a protrusion amount H. This protrusion amount H is preferably in the range of 0 <H ≦ 2 mm. Thereby, adhesion of the sealing agent 34 to the tip of the connecting portion 68 and solidification of the attached sealing agent 34 are suppressed.

That is, also in this configuration, the same operation and effect as those in the case where the pressure receiving surface 17 of the pressure gauge 16 is directly projected into the air pipe 24 can be obtained.

(Second Embodiment)
As shown in FIG. 4, in the tire pressure increasing device 30 according to the second embodiment, the position of the pressure gauge 16 is set to a position different from that of the first embodiment. That is, the pressure gauge 16 is attached to a joint hose 78 provided between the liquid agent container 18 and the tire 14.

Other configurations, that is, the structure of the connecting portion between the pressure gauge 16 and the joint hose 78, the structure of the pressure gauge 16, and the like are all the same as those in the first embodiment, and the description thereof is omitted.
Also in the present embodiment, as in the first embodiment, the pressure of the tire 14 can be detected by the pressure gauge 16 without operating the air compressor 20 at the time of puncture repair of the tire 14.

10 Tire pressure booster 14 Tire 16 Pressure gauge (pressure detection means)
17 Pressure receiving surface 18 Liquid container (repair liquid container)
20 Air compressor (Pressurized air supply means)
22 Backflow prevention valve (backflow prevention means)
24 Air pipe (first pipe material)
34 Sealing agent (repair solution)
36 Pressure detector 40 Bourdon tube (pressure transmission path)
42 Pressure transmission fluid 78 Joint hose (second pipe)

Claims (5)

A first pipe member provided between a repair liquid container storing repair liquid for puncture repair and pressurized air supply means for supplying pressurized air, and sending the pressurized air to the repair liquid container;
A second pipe member provided between the repair liquid container and the tire and transporting the repair liquid to the tire;
A backflow preventing means provided on the first pipe material for preventing the repair liquid from moving to the pressurized air supply means;
A pressure detection means for detecting a tire internal pressure, attached between the backflow prevention means of the first pipe material and the repair liquid container, or attached to the second pipe material;
A pressure transmission path that is provided between a pressure receiving surface of the pressure detection means and a pressure detection unit, and is filled with a pressure transmission liquid that transmits the pressure of the pressure receiving surface to the pressure detection unit;
A tire pressure increasing device.   2. The tire booster according to claim 1, wherein the pressure receiving surface protrudes from the first pipe member or the second pipe member by a protrusion amount H, and the protrusion amount H is in a range of 0 <H ≦ 2 mm. .   The pressure transmission path has an inner diameter D1 on the pressure receiving surface of 2 mm or less, and an axis of the pressure transmission path on the pressure receiving surface is orthogonal to an axis of the first tube material or the second tube material. 2. The tire pressure increasing device according to 2. In the first tube material or the second tube material, a connection portion to which the pressure detecting means is connected is formed,
The connecting portion is provided with an insertion hole into which the insertion portion having the pressure-receiving surface is inserted, and a communication path that connects the inside of the pipe material and the insertion hole. To the pressure receiving surface, and the ratio R (D2 / D3) between the inner diameter D2 of the communication path and the inner diameter D3 of the tube insertion hole is in the range of 0.1 to 1.0. The tire pressure raising device according to claim 1.   The tire pressure increasing device according to any one of claims 1 to 4, wherein the pressure transmission liquid is a hydrophobic liquid having a surface tension of greater than 72.75 mN / m.

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