JPH084941A - Tire valve cap - Google Patents

Abstract

PURPOSE:To easily check the tire pressure and indicate the tire pressure by providing a tire pressure indicator on a tire valve cap. CONSTITUTION:A tire valve cap consists of a body 1 where a window part 12 is formed, an opening/closing member 4 which is fixed to the inside of the body 1, and opens a valve 3 of a tube 2 of a tire and introduces the air pressure through the integrated movement with the body 1, and closes the valve 3 when not in movement, and a moving member 5 which is moved with the air pressure introduced from an opening/closing part 4 and is provided with a display part 10 to display the tire pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire valve cap having a tire pressure indicator.

[0002]

2. Description of the Related Art As a conventional valve cap, there is a black rubber valve cap for closing a valve of a tire.
A valve mouthpiece is provided at the air port of the tire tube,
A valve set screw is provided inside the valve base. A hole is formed in the central portion of the valve set screw, and a spindle supporting the valve of the tire passes through the hole. When the spindle is protruding, the tire valve is closed, and when the spindle is pushed, the tire valve is opened.

A black rubber cap is provided on the valve mouthpiece of this tire. The cap protects the valve from dust when air is introduced into the tube of the tire, and prevents air from leaking from the valve.

[0004]

However, in such a conventional tire valve cap, when checking the tire pressure or filling air with air, the caps are removed one by one and the air pressure is measured by the air pressure gauge. Is measured
The cap was attached to the valve again after the measurement.

Passenger cars are usually provided with four caps, truck double tires are provided with six caps, and double-wheeled double tires are provided with ten caps, and it is troublesome to check the tire pressure. Was there. In particular,
Recently, the wheel cap that attaches importance to the design has been installed, so even a person who is not accustomed to checking the tire pressure would take a lot of time to check the tire pressure with a single wheel cap.

The present invention has been made in view of the above-mentioned conventional problems, and by providing a tire pressure indicator on the tire valve cap, the tire pressure can be easily checked, and An object of the present invention is to provide a tire valve cap that can constantly display tire pressure.

[0007]

In order to achieve the above object, the present invention provides a valve for a tire tube by a body having a window portion and a tire tube fixed to the inside of the body and moving integrally with the body. Is opened to introduce air pressure, and an opening / closing member that closes the valve when it does not move, and a moving member having a display unit that moves by the air pressure introduced from the opening / closing member to display the tire pressure are provided. Characterize.

Further, the present invention is characterized in that the display portion comprises a plurality of colors colored on the skirt portion of the moving member, and changes in the tire pressure are indicated by the change in the color. Further, according to the present invention, the opening / closing member has a protrusion for pressing the spindle of the valve, an air pressure passage is formed in the opening / closing member, and the air passage is communicated with the outer first air pressure chamber. It is characterized in that holes are formed.

Further, according to the present invention, a nut member having a spline which is screwed into a valve mouthpiece portion of the valve and which allows the body to slide in the axial direction is provided, and the nut member is provided between the nut member and the opening / closing member. A spring member is provided in the air pressure chamber. Also,
The present invention is characterized in that the moving member is a pressure indicating piston which moves by the introduced air pressure and indicates a tire pressure.

Further, the present invention is characterized in that packing which is crushed by screwing the nut member into the valve mouthpiece portion is provided between the valve mouthpiece portion and the nut member. Further, the present invention, a body having a window portion, and an opening member that is fixed inside the body at the time of mounting and moves integrally with the body to constantly open the valve of the tire tube to introduce air pressure, A slide valve that can slide on the inner diameter portion of the body while being airtight and has airtightness with the mouthpiece portion of the valve, a nut member screwed into the valve mouthpiece portion, and introduced from the opening member. It is characterized in that it is provided with a moving member having a display unit that moves by air pressure and constantly displays tire pressure.

The present invention is also characterized in that packing is adhered to the slide valve, the large diameter side of the cone spring is fitted to the inner diameter side of the slide valve, and the small diameter side is fitted to the opening member. Further, the present invention is characterized in that the nut member and the body are fitted to each other without sliding the body with respect to the nut member.

[0012]

According to the tire valve cap of the present invention having such a configuration, the valve of the tire tube is opened by pressing the body and opening and closing the valve of the tire by the opening and closing member that is fixed inside the body and moves integrally with the body. The tire pressure is displayed by a moving member that is introduced and moves by the introduced air pressure.

That is, the tire valve cap of the present invention has a tire pressure indicator, and when the body is pushed, the tire pressure is displayed, for example, in color. For example, red indicates that the pressure is required to be low at low pressure, yellow indicates that the tire pressure is sufficient for normal running, and blue indicates that the tire pressure is for high speed running. In this way, the tire pressure can be easily checked, and even a person who does not understand the meaning of the tire pressure can secure safety by simply pushing the head portion of the valve cap before traveling.

Also, since the replacement of the valve cap is the same as the conventional man-hours for replacing the valve cap, it is sufficient to remove and install the valve cap only for tires with insufficient pressure. Therefore, the valve cap with normal air pressure can be removed. , The number of mounting steps can be reduced.
Further, when the valve cap is attached so that the valve is always open and the tire pressure is constantly displayed, the tire pressure can be checked only by looking closely. In this case, for example, when the person is running without noticing, another vehicle can notify the tire pressure drop state of the vehicle.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention. The left half of FIG. 1 shows the mounted state, and the right half of FIG. 1 shows the state in which the tire pressure is entered by pushing the head in order to check the pressure.

In FIG. 1, reference numeral 1 is a body, and the body 1 is composed of a small diameter portion 1A and a large diameter portion 1B, and is made of a transparent material such as transparent plastic. 1E is the head of the body 1. The valve 3 of the tire tube 2 is provided at a predetermined position of the inner diameter portion 1D of the body 1.
A center piece 4 as an opening / closing member for opening / closing the valve mouthpiece portion 3A is fixed, and the center piece 4 moves integrally with the body 1.

Reference numeral 5 denotes a pressure indicating piston as a moving member slidably provided inside the body 1, and an O-ring 6 is interposed between the pressure indicating piston 5 and the inner diameter portion 1C of the body 1. The O-ring 6 prevents the air from escaping behind. The skirt 7 is on the pressure indication piston 5.
Is formed, and the outer cylinder portion of the skirt portion 7 is provided in stripes with blue, yellow, and red colors from the lower side. Pressure display piston 5
A spring 8 is interposed between the inner wall of the body 1 and the inner wall of the body 1,
The magnitude of the movement of the pressure indicating piston 5 differs depending on the magnitude of the air pressure introduced into the second air pressure chamber 9.

Therefore, the colors of blue, yellow and red constitute the display portion 10 for displaying the moving amount of the pressure indicating piston 5, that is, the tire pressure. For example, red indicates the need for pressure supply at low pressure, yellow indicates tire pressure during normal driving,
Blue indicates tire pressure when running at high speed. These displays can be displayed numerically or on a scale when there is space like a track and it is desired to strictly manage the pressure.

On the inner diameter portion 1C of the body 1, a coating portion 11 is provided.
A and 11B are provided, and the coating parts 11A and 11B are provided.
The portion B is opaque so that the skirt portion 7 of the internal pressure indicating piston 5 cannot be seen. However, since the window portion 12 is transparent, it is possible to confirm each color of the skirt portion 7 from this window portion 12. it can. The center piece 4 has a protrusion 4A at the center thereof, and an air pressure passage 4B is formed inside the center piece 4. The air pressure passage 4B is the second
Communicating with the air pressure chamber 9.

A communication hole 4C is formed in the projection 4A, and the air pressure passage 4B communicates with the first air pressure chamber 13 outside the center piece 4 through the communication hole 4C.
A spring 14 is interposed in the first air pressure chamber 13 and biases the body 1 upward through the center piece 4. That is, the anchor nut (nut member) 15
A spring 14 is interposed between the center piece 4 and the center piece 4, and the snap ring 16 provided in the inner diameter portion 1D of the body 1 prevents the body 1 from popping out by the force of the spring 14.

The anchor nut 15 is screwed into a screw 17 cut on the outer diameter portion of the valve mouthpiece portion 3A of the tire, and the thrust due to this screwing in causes the valve mouthpiece portion 3A.
The packing 18 interposed between the end surface of the first air pressure chamber 13 and the anchor nut 15 is crushed so that the air pressure in the first air pressure chamber 13 does not leak to the outside. That is, the packing 18
Is made of a flexible material such as rubber or plastic, and is prevented from being crushed by the thrust force of the anchor nut 15 screwed in and leaking air pressure from between the valve mouthpiece portion 3A and the anchor nut 15.

A spline 19 is formed on the outer diameter portion of the anchor nut 15, and this spline 19 is formed on the inner diameter portion 1D of the body 1 and is fitted with the spline 20.
The body 1 can slide axially with respect to the anchor nut 15. Further, an O-ring 2 is provided between the anchor nut 15 and the inner diameter portion 1D of the body 1.
1 is interposed, and the first air pressure chamber 13 is provided by the O-ring 21.
This prevents the air pressure from leaking to the outside.

Reference numeral 2 is the tube, the material of which is made of rubber, and the valve mouth portion 3A is attached to the air port of the tube 2 and the valve mouth portion 3A.
A valve set screw 22 is screwed into the inside of the. When viewed from the axial direction, the valve set screw 22 has a hole formed in a central portion cut into two widths, and a spindle 23 that supports the valve 3 of the tire penetrates the hole.

When the spindle 23 is projected to the upper side as shown in the left half of FIG. 1, the valve 3 of the tire is closed and air pressure does not leak, but as shown in the right half of FIG. Then, the valve 3 is opened, and the air pressure in the tube 2 is changed to the first air pressure chamber 13, the communication hole 4C,
It is supplied to the second air pressure chamber 9 from the air pressure passage 4B. Next, the operation will be described.

When air is introduced into the tire tube 2, the valve cap having the pressure indicator of the present embodiment is attached to the air port of the tire tube 2 in the same manner as an ordinary valve cap. This state is shown in the left half of FIG. 1, and the protrusion 4A of the center piece 4 is not in contact with the spindle 23 of the valve 3 of the tire.

Therefore, the valve 3 is closed, the air pressure inside the tube 2 of the tire is not generated outside, and the first air pressure chamber 13, the communication hole 4C, the air pressure passage 4B, and the second air pressure chamber 9 are closed. Atmospheric pressure. Therefore, the pressure display piston 5
Is pushed downward by the spring 8 and the center piece 4 is in contact therewith. The window 12 of the body 1 shows a red color painted on the skirt 7 of the pressure indicating piston 5.

Here, in order to check the tire pressure, when the head 1E of the body 1 is pushed with a finger, the center piece 4 moves downward together with the body 1, and the protrusion 4A thereof is a valve of the tire. Push up the spindle 23 of 3. Therefore, the valve 3 is opened, and the air pressure inside the tube 2 is
Enters the second air pressure chamber 9 through the communication hole 4C and the air pressure passage 4B, and the color displayed through the window 12 of the body 1 by moving the pressure indicating piston 5 is from red to yellow or blue. Changes to.

When the color is yellow, it indicates that the tire pressure is sufficient for normal running, and when the color is blue, it indicates that the tire pressure is for high speed running. The display unit 10 displays the tire pressure according to the amount of shift of the pressure display piston 5. If the valve cap is normal, it is possible to check the tire pressure each time without removing the valve cap.

Even if the head 1E of the body 1 is pushed, the window 12
When the color seen from is still red and does not change, it indicates that the air pressure in the tire tube 2 is low. In this case, the valve cap may be removed and air pressure may be applied to normalize the valve cap. In this way, the air pressure can be checked easily. As a result, even a person who does not understand the meaning of tire pressure can use the head 1 of the body 1 before traveling.
You can check the safety just by pressing E.

Further, since the replacement of the valve cap is the same as the conventional man-hours for replacing the valve cap, it is sufficient to remove and install the valve cap on a tire with insufficient air pressure. Therefore, the valve cap with normal air pressure can be removed. The number of mounting steps can be reduced. When the set pressure of the air pressure differs depending on the vehicle type, the spring force of the spring 8 that presses the pressure indicating piston 5 may be changed according to the set pressure. Further, when there is a sufficient space near the valve 3 as in a large truck or a bus, detailed pneumatic pressure information may be given as a scale display or numerical display instead of the color. A diaphragm or bellows may be used instead of the pressure indicating piston 5. In this case, the structure becomes simple.

Next, FIG. 2 is a sectional view showing another embodiment of the present invention. The left half of FIG. 2 shows a state where the valve cap is attached to the valve of the tire, and the right half of FIG. 2 shows a state where the attachment of the valve cap to the valve is completed. In this embodiment, the valve of the tire is opened by attaching the valve cap, and the tire pressure is always displayed without pushing the body with a finger.

In FIG. 2, 4D is a center piece as an opening member, and the center piece 4D is a body 1
It is fixed to the inner diameter portion 1D of the body 1 and moves integrally with the body 1.
When the valve cap is attached, the center piece 4D moves downward together with the body 1 and always opens the valve 3.
The anchor nut 15A is fitted to the body 1 without sliding in the axial direction by the splines 19 and 20.

Reference numeral 31 is a packing, and the packing 31 is adhered to the lower surface 32A of the slide valve 32 so that it cannot be removed. The large diameter side of the cone spring 33 is fitted to the slide valve 32, and the small diameter side of the cone spring 33 is fitted to the protrusion 4A of the center piece 4D with a tight margin. The spring 33, slide valve 32, and packing 31 cannot be removed.

In the left half of FIG. 2, the valve cap is attached to the air port of the valve mouthpiece 3A of the tube 2 of the tire, and the screw 17 of the valve mouthpiece 3A is slightly tightened. Since the protrusion 4A of the center piece 4D is not yet in contact with the spindle 23 of the valve 3, the packing 31 is starting to be in contact with the end surface 3B of the valve mouthpiece 3A.

Therefore, even if the protrusion 4A of the center piece 4D pushes the spindle 23 of the valve 3 to release the air pressure of the tube 2 by tightening the valve cap, the air pressure is sealed in the packing 31. Therefore, air does not leak to the outside. That is, the air pressure does not leak from the first air pressure chamber 13 to the outside. Figure 2
As shown in the right half of Fig. 4, when the valve cap is tightened and the anchor nut 15A provided in contact with the center piece 4D is screwed into the screw 17 of the valve mouthpiece portion 3A to a predetermined position, the protruding portion 4A of the center piece 4D becomes Push the spindle 23 of the valve 3 to open the valve 3.

The air pressure in the tube 2 passes through the first air pressure chamber 13, the communication hole 4C, and the air pressure passage 4B to enter the second air pressure chamber 9, and pushes the pressure indicating piston 5 upward. The moving amount of the pressure indicating piston 5, that is, the tire pressure is displayed on the display unit 10. That is, each color (blue, yellow, red) painted on the skirt portion 7 of the pressure indicating piston 5 is always visible through the window portion 12 of the body 1. Yellow indicates that the tire pressure is sufficient for normal running, blue indicates that the tire pressure is for high speed running, and red indicates that the tire pressure is low.

As described above, in this embodiment, the tire pressure is displayed only by looking at it in the vicinity, which is convenient. For example, if the person is traveling without noticing,
It is also possible for another vehicle to notify the state of tire pressure drop of that vehicle. A diaphragm or a bellows can be used instead of the pressure indicating piston 5 which is moved by air pressure, and in this case, a simple structure can be adopted.

Also, in the method of displaying the air pressure, the amount of change due to the axial movement of the pressure indicating piston 5 is displayed, but the present invention is not limited to this, and the amount of change can also be displayed in the rotational direction.

[0039]

As described above, according to the present invention, by pushing the body, the valve of the tire tube is opened to introduce the air pressure, and the tire pressure is displayed by displaying the tire pressure. Because of this, it is possible to easily check the tire pressure, and it is possible to reduce the number of man-hours for removing and installing the valve cap with normal air pressure.

Further, when the valve is always opened by attaching the valve cap, the tire pressure is always displayed, and the tire pressure can be checked by looking closely.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1: Body 1A: Small diameter portion 1B: Large diameter portion 1C, 1D: Inner diameter portion 1E: Head portion 2: Tube 3: Valve 3A: Valve mouthpiece portion 3B: End face 4: Center piece (opening / closing member) 4A: Projection portion 4B: Air pressure passage 4C: Communication hole 4D: Center piece (opening member) 5: Pressure display piston (moving member) 6, 21: O-ring 7: Skirt portion 8, 14: Spring 9: Second air pressure chamber 10: Display portion 11A , 11B: coating part 12: window part 13: first pneumatic chamber 15, 15A: anchor nut (nut member) 16: snap ring 17: screw 18: packing 19, 20: spline 22: valve set screw 23: spindle 31 : Packing 32: Slide valve 32A: Lower surface 33: Cone spring

Claims (9)

[Claims] Claim: What is claimed is: 1. A body having a window portion, and a valve fixed to the inside of the body to move integrally with the body to open a valve of a tire tube to introduce air pressure, and when it does not move, close the valve. A tire valve cap, comprising: an opening / closing member, and a moving member that has a display unit that moves by air pressure introduced from the opening / closing member and displays a tire pressure. 2. The tire valve cap according to claim 1, wherein the display portion is composed of a plurality of colors colored on the skirt portion of the moving member, and changes in the tire pressure are indicated by the change in color. 3. The opening / closing member has a protrusion for pressing the spindle of the valve, an air pressure passage is formed in the opening / closing member, and a communication hole for communicating the air pressure passage and the first air pressure chamber on the outside. The tire valve cap according to claim 1, wherein the tire valve cap is formed. 4. A nut member having a spline that is screwed into a valve mouthpiece portion of the valve and that allows the body to slide in the axial direction, and is provided between the nut member and the opening / closing member and inside the first pneumatic chamber. The tire valve cap according to claim 1, further comprising a spring member. 5. The tire valve cap according to claim 1, wherein the moving member is a pressure indicating piston that moves by the introduced air pressure to indicate the tire pressure. 6. The tire valve cap according to claim 1, wherein a packing that is crushed by screwing the nut member into the valve mouthpiece is provided between the valve mouthpiece and the nut member. 7. A body having a window formed therein, an opening member fixed to the inside of the body at the time of mounting and moving integrally with the body to always open a valve of a tire tube to introduce air pressure, and the body. A slide valve that can slide while having airtightness on the inner diameter of the valve and has airtightness with the valve mouthpiece, a nut member screwed into the valve mouthpiece, and an air pressure introduced from the opening member. A tire valve cap comprising a moving member that has a display unit that moves and constantly displays tire pressure. 8. A packing is adhered to the slide valve,
The tire valve cap according to claim 7, wherein a large diameter side of the cone spring is fitted to an inner diameter side of the slide valve, and a small diameter side is fitted to the opening member. 9. The tire valve cap according to claim 7, wherein the nut member and the body are fitted to each other without sliding the body with respect to the nut member.