JPS6333152Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic indicator valve.

The conventional structure in which a valve cap-type tire pressure indicator is attached to a pneumatic valve can reduce weight, but since it must be tightened by hand, it is difficult to set the tightening torque within an appropriate range when tightening the pneumatic pressure indicator to the pneumatic valve. As a result, if the tightening torque is too low, air may leak from the fitting part of the pneumatic valve and the pneumatic indicator, and if the tightening torque is too high, the air may leak from the fitting part of the pneumatic valve and the pneumatic indicator. There was a possibility that the gasket provided at the fitting part of the product could be damaged. Furthermore, since the pneumatic pressure indicator has a structure that can be removed from the pneumatic valve, if the pneumatic indicator is loosened by a third party for mischief, air loss may occur. Also, there was a concern that the tires would be damaged when driving with low air pressure. On the other hand, if an air pressure indicator was attached to the air pressure valve, there was a problem in that the amount of tire imbalance increased accordingly.

SUMMARY OF THE INVENTION An object of the present invention was to provide an air pressure indicator valve which improves reliability as an indicator and reduces tire imbalance.

In order to achieve this purpose, the present invention
Fix the inner threaded part of the transparent resin cover to the outer threaded part of the mouthpiece, which is screwed onto the outer threaded part of the valve core.
Inside the transparent resin cover, a check valve is provided at the upper end of the valve core to allow air to pass through to the transparent resin cover side, a bellow is provided above the check valve, and a float is provided above the bellow so that it can rise and fall freely. Then, install a spring that biases this float downward.
By covering the inner surface of the transparent resin cover with a cover member, a partially uncovered window is formed, and as the float moves up and down, the part visible through the window is colored in upper and lower sections, and in this way, The constructed pneumatic pressure indicator valve is attached to the tire in a line-symmetrical position with the pneumatic pressure valve separately provided on the tire.

Hereinafter, details of the present invention will be explained using examples shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of the pneumatic indicator valve according to the present invention. As shown in FIG. 2, this pneumatic pressure indicator valve 1 is attached to the tire 3 in a line-symmetrical position with respect to the mounting position of a normal pneumatic pressure valve 2. Now, to explain the structure of the pneumatic indicator valve 1, reference numeral 4 denotes a rubber cover, which constitutes a valve seal portion. A metal core 5 having a substantially hollow cylindrical shape is inserted and coupled to the center of the cover 4, and the core 5 protrudes from the cover 4.
A threaded portion 5a is provided on the outer periphery of the upper end of the
A cap 6 is screwed onto the threaded portion 5a of the core 5. Further, a threaded portion 6a provided on the outer periphery of the base 6 is screwed with a lower end inner threaded portion 7b of a transparent resin cover 7 constituting an air pressure indicator. Part 7
The screw fastening parts between b and the cap 6, and the cap 6 and the core 5 are fixed by adhesive or caulking to prevent loosening. Further, a packing 8 is disposed at the upper end of the core 5, and a flange portion 9a of a check valve 9 is placed on the upper part of the packing 8. Further, on the upper part of the packing 8, a presser washer 10 having a hole 10a in the center is arranged between the packing 8 and the flange portion 9 of the check valve 9.
They are arranged so as to sandwich a. The structure is such that air sealing is performed depending on the amount of interference between the upper end of the core 5 and the packing 8, and the clamping force between the transparent resin cover 7 and the cap 6 is transmitted to the stopper 11 by the press washer 10. It is configured like this. The stopper 11 is connected to the transparent resin cover 7.
The lower end and the pusher washer 1
0 and the lower end flange portion 12a of the bellows 12.
A spacer 13 is interposed between the upper end thereof and the lower end of the window 7a of the transparent resin cover 7. Further, within the transparent resin cover 7, a float 14 is connected to the stopper 11 and the cover 15 at the upper end of the bellows 12.
The float 14 is arranged so that it can move up and down freely between the floats 14 and 14. The outer circumferential portion of the float 14 is configured to have a two-stage cylindrical shape, and the outer circumferential portion includes, for example, the outer circumferential surface of the large cylindrical portion 14a. The outer peripheral surface of the small cylindrical portion 14b is colored blue. Further, the float 14 is
By means of a spring 16 interposed between the float 14 and the cover 15, the stepped portion 14c is normally held in contact with the upper end of the stopper 11 as shown in FIG. The color applied to the outer peripheral surface of the cylindrical portion 14a is displayed on the window 7a of the transparent resin cover 7. The cover 15 also serves as a seat for the spring 16, and is made of a colored resin material.

In the pneumatic indicator valve 1 configured as described above, when air pressure is sent from the direction of arrow A in FIG. Pushing up, this causes the ball valve 9b and the seat surface 9 to
hole 10a of presser washer 10 from the gap created between
It is fed into the bellows 12 through. and,
The float 14 is actuated by the force relationship between the air pressure sent into the bellows 12 and the elasticity of the spring 16. That is, when the pressure inside the bellows 12 is smaller than the elasticity of the spring 16, the large cylindrical portion 14a of the float 14 is released as shown in FIG.
The color colored on the outer circumferential surface of the float 14 is displayed on the window 7a of the transparent resin cover 7. On the other hand, when the pressure inside the bellows 12 becomes greater than the elasticity of the spring 16, the outer circumferential surface of the small cylindrical portion 14b of the float 14 is displayed. The colored color is displayed on the window 7a of the transparent resin cover 7.

As explained above, according to the pneumatic indicator valve according to the present invention, the threaded part on the transparent resin cover side of the pneumatic pressure indicator is fixed to the threaded part on the valve core side via the cap, so that it is difficult to prevent intentional damage caused by a third party. Not only can air leakage be reliably prevented, but also variations in the tightening torque when tightening the pneumatic pressure indicator to the pneumatic valve can be eliminated, so the reliability of the indicator can be improved. In addition, since the pneumatic pressure indicator valve of the present invention is attached to the tire in a line-symmetrical position with the pneumatic pressure valve installed separately on the tire, it has the effect of reducing the amount of unbalance in the tire when viewed as a whole. play.

Furthermore, with the check valve, even if the transparent resin cover or bellows is damaged due to contact with a curb or a flying stone, the air inside the tire will be rapidly removed by the check valve underneath. This can prevent leakage. In addition, the float is colored at the top and bottom, and the air pressure inside the tire can be determined by looking at the colors through the window of the transparent resin cover, so there is no need to read the scale, as is the case with conventional floats, to determine the air pressure. The outside of tires tends to get dirty with dirt and dust, so it is more advantageous to be able to understand this by color than by looking at scales.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the air pressure indicator valve according to the present invention, and FIG. 2 is a schematic structural diagram of a tire equipped with the air pressure indicator valve of the present invention. 1... Air pressure indicator valve, 2... Air pressure valve, 3... Tire, 5... Core, 5a...
Threaded part, 6...Base, 7...Transparent resin cover, 7
b...Lower end inner peripheral thread.

Claims (1)

[Scope of Claim for Utility Model Registration] In a pneumatic indicator valve configured by attaching a pneumatic indicator to the rear side of the pneumatic valve, a cap 6 screwed onto the outer peripheral thread of the valve core 5.
The inner threaded part of the transparent resin cover 7 is fixed to the outer threaded part of the transparent resin cover 7, and a check valve 9 for passing air to the transparent resin cover 7 side is provided at the upper end of the valve core 5 inside the transparent resin cover 7. A bellows 12 is provided above the valve 9, a float 14 is disposed on the bellows 12 so as to be able to rise and fall freely, a spring 16 is attached to bias the float 14 downward, and an inner surface of the transparent resin cover 7 is provided. By covering with the cover members 15 and 11, a partially uncovered window 7a is formed, and as the float 14 moves up and down, the window 7a
This air pressure indicator valve is characterized in that the more visible part is colored top and bottom, and the air pressure indicator valve configured in this manner is attached to the tire in a position symmetrical to the air pressure valve separately provided on the tire.