JP3084290U - Tire pressure regulator - Google Patents

Abstract

(57) [Problem] To provide a tire pressure judging device capable of easily reducing the air pressure in a tire to a predetermined pressure. According to the tire pressure regulator of the present invention,
When the check valve 50 is pushed into the cylindrical mounting portion 11, the check valve 5
0 hits the valve pressing portion 15 and opens, and the compressed air is released from the tire 55 and stays in the bag structure portion 20. Here, if the air pressure in the tire 55 is high, the flexible valve 33 provided in the bag structure section 20 is pushed by the air pressure, and the first discharge port 3
7 is closed. However, the compressed air in the bag structure 20 is discharged out of the normally open second discharge port 24, and the air pressure in the bag structure 20 gradually decreases. When the air pressure in the bag structure section 20 becomes lower than a predetermined value, the flexible valve 33
Is resiliently restored, thereby opening the first outlet 3
7 emits a compressed air, and a sound is generated from the whistle body.
You can remove it from.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tire pressure regulator for regulating the pressure in a tire.

[0002]

[Prior art]

 During driving with a car, for example, there is a case where the road surface condition deteriorates by entering a snowfall area. In such a case, when a snow chain or the like is not prepared, an emergency measure is generally taken to open the check valve of the tire and lower the air pressure in the tire to improve the grip of the tire.

[0003] Conventionally, for example, by deflating the tire by an appropriate amount depending on the operator's feeling, the work of checking the grip of the tire is repeated, and the grip of the tire is improved by trial and error. I was

[0004]

[Problems to be solved by the invention]

 However, in the above-described conventional method, the work is troublesome and relies on the feeling of the operator. For example, a situation may occur in which the tire is damaged due to excessive air bleeding from the tire, or the vehicle may be damaged. A situation can arise in which the balance between the tire pressures becomes poor.

When an air pressure gauge is provided, a method of checking the pressure with the pressure gauge and reducing the air pressure in the tire to a predetermined value can be adopted. It is difficult to do the work.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tire pressure judging device capable of easily reducing the air pressure in a tire to a predetermined pressure.

[0007]

Means for Solving the Problems To achieve the above object, a tire pressure regulator according to the invention of claim 1 comprises a cylindrical mounting portion fitted outside a check valve provided on a tire. The compressed air released from the check valve communicates with the valve pressing part that contacts the tip of the check valve fitted to the cylindrical mounting part and opens the check valve, and the internal space of the cylindrical mounting part. And a first discharge port formed in the bag structure to discharge compressed air in the bag structure to the outside, and a first discharge port inside the bag structure. If the air pressure in the bag structure is higher than a predetermined value, the air pressure is elastically deformed so as to close the first discharge port, and the air pressure in the bag structure is lower than the predetermined value. In such a case, a flexible valve which is restored by elastic force to open the first discharge port, and a first discharge port is provided. The whistling body that generates sound due to the compressed air that passes through it, and the compressed air that is formed in the bag structure and is constantly opened and released so that the pressure of the compressed air that has accumulated in the bag structure gradually decreases. And a second discharge port for discharging.

In the present invention, the term “compressed air” is not limited to compressed air, but broadly means “compressed gas (gas)”. For example, compressed nitrogen gas, argon gas, etc. It is included in "compressed air" in the invention.

A second aspect of the present invention is the tire pressure regulator according to the first aspect, wherein the flexible valve doubles as a whistle.

According to a third aspect of the present invention, there is provided the tire pressure regulator according to the first or second aspect, further comprising an opening area changing means for changing an opening area of the second discharge port. It is characterized in that the air pressure in the tire when the whistle starts to sound is different between the case where the opening area of the second discharge port is made smaller and the case where the opening area is made larger.

According to a fourth aspect of the present invention, in the tire pressure regulator according to the third aspect, the opening area changing means slides with respect to the bag structure portion or the cylindrical mounting portion to open the second discharge opening. In addition to being constituted by a slider that changes the area, the bag structure portion or the cylindrical mounting portion is provided with a plurality of scales indicating the position of the slider, and the scale is provided inside the tire when the whistle starts to sound. The feature is that the air pressure is indicated by a numerical value.

According to a fifth aspect of the present invention, in the tire pressure regulator according to any one of the first to fourth aspects, the cylindrical mounting portion and the bag structure portion are separately formed so as to be detachable from each other. It has a characteristic where it is joined.

[0013]

[Actions and effects of the invention]

 <Invention of claim 1> According to the tire pressure regulator of claim 1, when the check valve is pushed into the cylindrical mounting portion, the check valve hits the valve pressing portion and opens, and the compressed air is released from the tire. To stay in the bag structure. Here, when the air pressure in the tire is high, the air pressure in the bag structure becomes higher than a predetermined value, and the flexible valve provided in the bag structure is pushed by the air pressure to close the first discharge port. However, the compressed air in the bag structure is discharged to the outside through the normally open second discharge port, and the air pressure in the bag structure gradually decreases together with the air pressure in the tire. Then, when the air pressure in the bag structure portion becomes lower than a predetermined value, the flexible valve is restored by the elastic force, whereby the compressed air flows through the opened first discharge port, and the sound from the whistle body is released. Occurs. When the sound is signaled and the tire pressure regulator is removed from the tire, the check valve closes and the air pressure in the tire drops to a predetermined pressure.

As described above, according to the present invention, the air pressure in the tire can be easily reduced to a predetermined pressure without the need for trial and error, because the tire pressure does not depend on the feeling of the worker. It is possible to prevent a situation in which too much air is exhausted from the tires or a situation in which the tire pressures of a plurality of tires are unbalanced. Further, since the sound indicates that the air pressure in the tire has dropped to a predetermined pressure, the work of lowering the air pressure in the tire can be easily performed even at night.

<Invention of Claim 2> In the invention of claim 2, since the flexible valve also serves as a whistle body, the manufacturing cost can be reduced as compared with the case where these are separately provided.

According to the third aspect of the present invention, the opening area changing means changes the opening area of the second discharge port to reduce the air pressure in the tire when the whistle starts to sound. Because of the difference, the air pressure in the tire can be easily reduced to a desired pressure.

According to the invention of claim 4, if the tire pressure regulator is mounted on the check valve of the tire by adjusting the slider to a predetermined scale, the air pressure in the tire is reduced by the slider. The whistle begins to sound when the value is reduced to the value indicated on the scale with. As a result, the air pressure in the tire can be easily reduced to the value indicated on the scale.

<Invention of Claim 5> In the invention of claim 5, since the tubular mounting portion and the bag structure portion are detachable from each other, the whistle body and the flexible valve provided in the bag structure portion have failed. In such a case, the replacement work can be easily performed.

[0019]

[Embodiment of the invention]

 First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The tire pressure regulator 10 of the present embodiment has a cylindrical shape extending in the up-down direction of FIG. 1 as a whole, and one end of the cylinder constitutes a cylindrical mounting portion 11 according to the present invention, while the other end thereof has This constitutes the bag structure 20 according to the present invention. As shown in FIG. 2, the tubular mounting portion 11 and the bag structure portion 20 are separately formed and detachably connected to each other.

The cylindrical mounting portion 11 is shown on the lower side of FIG. 2, and has a structure in which a cylindrical inner cylindrical body 13 is fitted and fixed to the inside of a cylindrical outer cylindrical body 12 halfway. Eggplant Then, as shown in FIG. 1, the bag structure portion 20 is fitted to a portion of the inner cylinder 13 that protrudes from the outer cylinder 12.

As shown in FIG. 3, a column 14 is inserted in an end opening of the inner cylinder 13 located inside the outer cylinder 12 in a radial direction of the opening. The column 14 and the end face 13A of the inner cylinder 13 are substantially flush with each other, and the valve pressing portion 15 protrudes from the center of the column 14.

The check valve 50 can be fitted to the cylindrical mounting portion 11 from the end opposite to the fitting portion with the bag structure portion 20. The check valve 50 projects through a wheel of the tire 55 as shown in FIG. 4, for example. As shown in FIG. 5, the check valve 50 is formed by assembling a valve core 52 inside a tapered metal cylinder 51. Usually, a valve shaft 53 provided in the valve core 52 is, for example, a metal cylinder. 51 extend to a position substantially flush with the distal end surface.

When the check valve 50 is fitted into the cylindrical mounting portion 11, as shown in FIG. 5, the valve shaft 53 of the valve core 52 is moved to the rear side of the metal tube 51 by the valve pressing portion 15. When it is pushed down, the check valve 50 is opened, and the compressed air in the tire 55 passes through the side of the pillar 14 and is discharged into the inner cylinder 13. At this time, the end face 13A of the inner cylinder 13 and the end face of the check valve 50 are in surface contact with each other, thereby restricting the leakage of air downward along the outer face of the check valve 50.

The bag structure 20 is shown on the upper side of FIG. 2, and is formed by assembling a whistle valve core 30 inside a cylindrical body 21. One end of the cylindrical body 21 is open, the cylindrical mounting portion 11 is fitted therein, the other half is closed by a bottom wall 22, and the other half is a semicircular opening 23. Further, a second discharge port 24 (the first discharge port 37 will be described later) is formed laterally at an intermediate portion in the longitudinal direction of the cylindrical body 21.

The whistle valve core 30 is shown in the center of FIG. 2. For example, a metal groove 32 and a metal flexible valve 33 are attached to a cylindrical resin housing 31 having one end and a bottom. Assembled. The cylindrical resin housing 31 has a tapered shape in which the outer diameter is slightly narrowed toward the opening end side, and a pair of the resin housings 31 extends laterally from the outer peripheral surface on the bottom wall side (the upper end side in the figure). The ridges 34, 34 are overhanging. A semicircular opening 35 corresponding to the semicircular opening 23 is formed in the bottom wall.

The groove body 32 extends in the up-down direction in FIG. 2 and has openings in two directions, that is, the upper side and the left side in FIG. The edge of the upper opening has an arc shape and is fitted to the arc portion of the semicircular opening 35.

On the other hand, a flexible valve 33 is opposed to the opening 36 of the groove 32 facing left. More specifically, the flexible valve 33 has a flat plate shape and is always opposed to the edge of the opening 36 with a gap therebetween. When the air pressure in the bag structure portion 20 becomes higher than a predetermined value, The flexible valve 33 closes the edge of the opening 36 and closes the opening 36. Then, when the air pressure in the bag structure section 20 becomes lower than a predetermined value, the flexible valve 33 is restored by the elastic force, and the opening 36 is opened. Here, in the present embodiment, when the flexible valve 33 switches from the closed state to the open state, the rigidity of the flexible valve 33 and the second The opening area and the like of the discharge port 24 are set.

The opening 36 and the semicircular openings 23 and 35 communicate with each other to constitute a first discharge port 37 of the present invention for discharging compressed air from the bag structure 20. Therefore, the first discharge port 37 is opened and closed by the flexible valve 33.

The whistle valve core 30 is inserted to the inner part of the cylindrical body 21 and is assembled so that the semicircular opening 35 of the cylindrical resin housing 31 is aligned with the semicircular opening 23 of the cylindrical body 21. Further, the ridges 34 provided on the cylindrical resin housing 31 are in close contact with the inner peripheral surface of the cylindrical body 21, and air flows through a gap between the outer peripheral surface of the cylindrical resin housing 31 and the inner peripheral surface of the cylindrical body 21. Plays a role in preventing leakage.

The tire pressure regulator 10 of the present embodiment is configured as described above. Next, the operation and effect of the tire pressure regulator 10 will be described. Since the tire pressure regulator 10 of the present embodiment is very small and light in weight as compared with a snow-packing chain, it can be kept in a dashboard in a car, for example.

When the vehicle is driven and, for example, enters a snowfall area, as shown in FIG. 5, the tire pressure regulator 10 is pressed against the check valve 50 of the tire 55. More specifically, the check valve 50 is pressed into the cylindrical mounting portion 11 so that the tire pressure regulator 10 is pressed. Then, as shown in the figure, the valve pressing portion 15 abuts against the valve shaft 53 of the check valve 50 and pushes down in the cylindrical mounting portion 11, whereby the valve core 52 is opened, and the bag structure portion 20 is removed from the tire 55. Compressed air is released and stays inside.

Here, FIG. 7 shows a transition of the air pressure in the tire 55. As shown in the drawing, the tire 55 is filled with compressed air at an optimum pressure of 5 atm under normal road surface conditions. In the initial stage when the tire pressure regulator 10 is mounted, the air pressure in the bag structure 20 is increased by receiving 5 atm in the tire 55, and the flexible valve 33 provided in the bag structure 20 is The first discharge port 37 (specifically, the opening 36) is closed by being pressed by air pressure. However, since the air pressure in the bag structure portion 20 is gradually released to the outside through the normally open second discharge port, the air pressure in the bag structure portion 20 gradually decreases together with the air pressure in the tire 55. .

Then, when the air pressure in the tire 55 becomes 1.5 atm, the air pressure in the bag structure 20 becomes lower than a predetermined value, and the flexible valve 33 is restored by the elastic force. As shown in (1), the first discharge port 37 (specifically, the edge of the opening 36) is opened. Then, as shown in the figure, compressed air flows outward from the first discharge port 37, and the flexible valve 33 vibrates to generate sound. When this sound is signaled, the tire pressure regulator is removed from the tire 55, the check valve 50 is closed, and the air pressure in the tire 55 is reduced to a predetermined pressure (1.5 atm).

As described above, according to the present invention, the air pressure in the tire 55 can be easily reduced to a predetermined pressure without the need for trial and error, since the air pressure in the tire 55 can be easily reduced without relying on the feeling of the worker. It is possible to prevent a situation where too much air is extracted from the tire 55 or the balance of the air pressure of each tire 55 is deteriorated. Further, since the sound informs that the air pressure in the tire 55 has dropped to a predetermined pressure, the work of lowering the air pressure in the tire 55 can be easily performed even at night. Moreover, since the flexible valve 33 also serves as a whistle body, it is possible to reduce the manufacturing cost as compared with the case where these are separately provided. Further, since the tubular mounting portion 11 and the bag structure portion 20 are detachable from each other, when the flexible valve 33 or the like breaks down, the whistle valve core 30 can be easily replaced.

In FIG. 7, when a certain time has elapsed from the timing when the flexible valve 33 generated the sound (T1 in FIG. 7), the sound continued to be emitted, and the air was evacuated. Air pressure drops to 1 atm. Therefore, it is also possible to fine-tune the air pressure in the tire 55 by adjusting the sounding time.

Second Embodiment A tire pressure regulator 40 of the present embodiment is shown in FIGS. 8 and 9, and has a cylindrical slider outside the bag structure 20 described in the first embodiment. The first embodiment differs from the first embodiment only in that 41 is provided so as to be slidably fitted and that a scale is provided on the outer surface of the bag structure portion 20. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration will be denoted by the same reference numeral, without redundant description.

The slider 41 can slide outside the bag structure section 20 to change the opening area of the second discharge port 24. A plurality of scales are provided along the sliding direction of the slider 41 on the side of the second discharge port 24, and each scale is provided with a numerical value. If the slider 41 is adjusted to a predetermined scale and the tire pressure regulator 40 is mounted on the check valve 50 of the tire 55, the air pressure in the tire 55 decreases to the value indicated on the scale with the slider 41 adjusted. Then, the flexible valve 33 starts to sound. Thus, the air pressure in the tire 55 can be easily reduced to the pressure indicated on the scale.

<Other Embodiments> The present invention is not limited to the above-described embodiment. For example, the following embodiments are also included in the technical scope of the present invention. Various changes can be made without departing from the scope of the invention.

(1) The tire pressure regulator 10 of the first embodiment has a structure in which the entirety extends straight in a cylindrical shape and includes a valve pressing portion 15 inside the cylindrical mounting portion 11. As in the tire pressure regulator 43 shown in FIG. 10, a structure in which the tubular mounting portion 44 and the bag structure portion 45 intersect at right angles may be adopted. Further, in this case, a valve pressing portion 46 for opening the check valve 50 may be constituted by a rod penetrating the wall of the bag structure portion 45.

(2) In the tire pressure regulator 10 of the first embodiment, the flexible valve 33 also serves as a whistle body, but may have a configuration in which the flexible valve and the whistle body are separately provided. . Specifically, a flexible valve 62 is arranged with a gap between the first discharge port 61 and the first discharge port 61, as in a tire air pressure control 60 shown in FIG. A cap 63 is attached to the outside of the cap 63, and a cylindrical whistle body 65 having a thinned tip is projected from the edge of the through hole 64 formed in the cap 63 toward the discharge port 61. Is also good. In the air pressure adjustment 60 in the tire shown in the figure, a cylindrical mounting portion 66 and a bag structure portion 67 are continuously formed to form one cylindrical body, and a column member 68 is penetrated in the middle of the cylindrical body. The column member 68 has a valve pressing portion 69 protruding therefrom.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a tire pressure regulator according to a first embodiment of the present invention.

FIG. 2 is an exploded sectional view of the tire pressure regulator.

FIG. 3 is an exploded perspective view of the tire pressure regulator.

FIG. 4 is a perspective view of a tire and a check valve.

FIG. 5 is a side sectional view showing a state in which a tire pressure regulator is mounted on a check valve.

FIG. 6 is a side sectional view showing a state in which a tire pressure regulator is mounted on a check valve.

FIG. 7 is a graph showing changes in air pressure in a tire.

FIG. 8 is a side sectional view of a tire pressure regulator according to a second embodiment.

FIG. 9 is a side view of the tire pressure regulator.

FIG. 10 is a side sectional view of a tire pressure regulator of Modification Example 1.

FIG. 11 is a side sectional view of a tire pressure regulator of Modification Example 2.

[Explanation of symbols]

 10, 40, 43, 60 ... tire pressure regulator 11, 44, 66 ... cylindrical mounting part 15, 46, 69 ... valve pressing part 20, 45, 67 ... bag structure part 24 ... second discharge port 33, 62 ... Flexible valves 37,61 ... First discharge port 41 ... Slider 50 ... Check valve 55 ... Tire 65 ... Whistle body

Claims (5)

[Utility model registration claims] A cylindrical mounting portion fitted to the outside of a check valve provided on a tire; and a check valve abutting against a tip of the check valve fitted to the cylindrical mounting portion. A valve pressing portion that opens the airbag, a bag structure communicating with the internal space of the cylindrical mounting portion, and for retaining compressed air discharged from the check valve; and a bag formed in the bag structure and the bag. A first discharge port for discharging the compressed air in the structure to the outside; and a first discharge port disposed inside the bag structure to face the first discharge port, and an air pressure in the bag structure is higher than a predetermined value. When the air pressure is high, the first discharge port is elastically deformed so as to close the first discharge port. When the air pressure in the bag structure portion is lower than a predetermined value, the first discharge port is restored by a resilient force, and A flexible valve that opens the first outlet; and a compressed air that passes through the first outlet generates a sound. A whistle body, and a second discharge port formed in the bag structure portion and always opened to discharge the compressed air to the outside so as to gradually reduce the pressure of the compressed air retained in the bag structure portion. A tire pressure regulator, comprising: 2. The tire pressure regulator according to claim 1, wherein the flexible valve also serves as the whistle body. 3. An opening area changing means for changing an opening area of the second discharge port, wherein the opening area of the second discharge port is reduced and increased by the opening area changing means. The tire pressure regulator according to claim 1 or 2, wherein the air pressure in the tire when the whistle body starts to sound is made different. 4. The opening area changing means is constituted by a slider which slides on the bag structure section or the cylindrical mounting section to change an opening area of the second discharge port. The structure portion or the cylindrical mounting portion is provided with a plurality of scales indicating the position of the slider, and the air pressure in the tire when the whistle body starts to sound is indicated by a numerical value. The tire pressure regulator according to claim 3. 5. The tire pressure regulator according to claim 1, wherein the cylindrical mounting portion and the bag structure portion are separately formed and detachably connected to each other. .