JPH0354008A - Tire valve - Google Patents

Abstract

PURPOSE:To facilitate confirmation of the internal pressure of tire without using an independent exclusive metering unit by providing a float or the like moving with the tire air pressure inside a cover installed on a valve main body so as to display the internal pressure of tire according to the movement of float. CONSTITUTION:In measuring the internal pressure of tire, a cap 15 is first removed, and a core 2 of a valve main body 1 is compressed through a retaining rod operated. A valve seat 18 of the core 2 moves then to open a valve, and thus the air in the tire flows to compress the inner pressure of a float 12 fitted into a cover 4 of the main body 1. The float 12 is stopped at a position where the pressure of air balances with the energizing force of a resilient member 11 compresses the float 12 inward. In this case the indication of an air pressure indication part 8 showing the indication line 13 of the float 12 is read out for confirmation of the inner pressure of tire. A normal region A, caution region B and danger range C are for example provided at the air indication part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire valve that can easily sulfurize the tire internal pressure.

[Prior art and problems to be solved by the invention] Conventionally, in order to check the tire internal pressure, the valve cap knob was removed and the pressure was checked using a dedicated air gauge. However, since the -II dryer does not have this dedicated gauge, there is a problem in that it cannot be easily and accurately determined whether the tire internal pressure is normal or not anytime and anywhere. Therefore, an object of the present invention is to solve such problems.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention removably attaches a cylindrical transparent cover having an air pressure display to a tire valve body having a core for opening and closing the valve, and displays the inside of the cover. A presser bar for pressing the core, and a float that receives tire air pressure and is elastically biased toward the valve body side by a bullet destination member are provided, and the inside of the core is not subjected to pressure. The position of the float at which the number of times is +J+ can be read on the air pressure display section of the cover.

[Effect]

When measuring the internal pressure of a tire, when the presser bar is pressed to press the core, the tire hull becomes inactive, causing the air inside the tire to flow out and pressurize the float. At this time, the air pressure moves while being controlled by the elastic force of the elastic member provided on the float, and stops at a position where the air pressure and the elastic force of the elastic member are balanced, and the float in this state You can check the tire internal pressure by reading the air pressure display shown below.

〔Example] The present invention will be described below based on illustrated embodiments.

FIG. 1 shows an embodiment of a tire valve according to the present invention,
Reference numeral 1 denotes a valve body having a core 2 for opening and closing the valve, and a conventional valve body 1 can be used as is.

A male screw 3 screwed into the open end of the valve body 1 is screwed into a threaded hole at one end of a cylindrical transparent cover 4 made of plastic.

Further, the other end of the cover 4 is threaded with a male screw 5 having the same thread diameter and pitch as the male screw 3, and at the other end, the inner circumferential surface 6 of the cover 4 has a diameter. A narrow, narrow diameter hole 7 is provided through the hole. 8 is an air pressure display section;
The air pressure display section 8 consists of a normal area A, a caution area B, and a dangerous area C, each of which is colored blue, yellow, red, etc. Further, a presser rod 9 for pressing the core 2 is inserted into the cover 4 along its axis. The presser rod 9 has one end capable of coming into contact with the proximal end of the core 2, and the other end is fitted into the hole 7 with a small gap and exposed to the outside of the cover 4. By manually pressing the other end of the exposed presser rod 9, the core 2 is pressed and the valve seat 10 provided at the tip of the core 2 moves, opening the valve (see Figure 2). . Furthermore, a float 12 is fitted inside the cover 4, which receives tire air pressure in an open state and is resiliently biased toward the hull main body 1 by a resilient member 11 such as a coil spring.

The float 12 can slide on the inner circumferential surface 6 of the cover 4 with a minute gap, and in the initial state, it is desirable that the float 12 be in the danger zone C of the air pressure display section 8, and
The characteristics such as the spring constant of the elastic member 11 are set so that the float 12 moves to the normal area A when the tire internal pressure is normal in the valve open state.

At this time, an indicator line 13 may be attached to the float 12 to indicate the position of the float 12. A hole 14 is bored in the center of the float 12, and the presser rod 9 is fitted into the resilient member 11 and into the hole 14 so as to be able to move forward and backward.

15 is a cap, and a conventional one is used.

However, when measuring the tire internal pressure, as shown in Figure 2,
Remove the cap l5 and press the presser bar 9 to remove the core 2.
When pressed, the valve seat 10 moves to open the valve, and the air inside the tire flows as shown by the arrow in the figure, causing the float 1 to move.
Pressurize the inner surface of 2. Arrow P is the pressure that acts at this time. At this time, the air pressure P stops at a position where the elastic biasing force of the resilient member 11 that pushes the float l2 inward is balanced,
In this state, the tire internal pressure can be confirmed by reading the display on the air pressure display section 8 indicated by the indicator line 13 of the float 12.

After the measurement is completed, when the presser bar 9 is released, the core 2 returns to its original position by the action of the spring 16, and the valve seat 10 closes again.

Since there is a minute gap between the float l2 and the inner circumferential surface 6 of the cover 4, and there is also a minute gap between the presser rod 9 and the small diameter hole 7 of the cover 4, air can be drawn from there. flows out, and the float l2 gradually moves and returns to its initial state.

Further, the cover 4 containing the presser rod 9, the resilient member 11, the float 12, etc. may be attached to the valve body 1 at all times, or may be attached (removably) only during measurement. If you install it only for measurement, you can measure the internal pressure of multiple tires with one measuring tool.

Note that the present invention is not limited to the above-described embodiments, and design changes may be made without departing from the gist of the present invention.

For example, you can increase or decrease the level of the air pressure display section 8, or
The pressure may be displayed numerically.

Furthermore, for example, the pressure semiconductor and the display liquid crystal may be moved by the energy of a solar power source set in the hull body 1 (or cover 4) to display numerical values.

[Effects of the Invention] Since the present invention is configured as described above, it produces the remarkable effects described below.

■ Drivers can easily check tire pressure anytime, anywhere.

(2) It has a simple structure in which the presser rod 9, the springing member 11, and the float 12 are provided in the cover 4, so it can be manufactured at low cost.

■ The conventional Harp body 1 can be used as is.

(2) Since the float 12 is resiliently biased by the resilient member 11, measurements can be made no matter where the tire valve body 1 is located.

[Brief explanation of drawings]

FIG. 1 is a half-cut sectional view showing an embodiment of the present invention, and FIG. 2 is an explanatory view of its operation. DESCRIPTION OF SYMBOLS 1... Valve body, 2... Core, 4... Transparent cover 8... Air pressure display section, 9... Presser bar, l1.
...Bulging member, l2...Float. Patent applicant: Sumitomo Rubber Industries, Ltd. Figure 1 Figure 2

Claims (1)

[Claims] 1. A tire valve body 1 having a core 2 for opening and closing the valve,
A cylindrical transparent cover 4 having an air pressure display section 8 is detachably attached, and inside the cover 4 there is a presser rod 9 for pressing the core 2, and a pressure rod 9 for receiving tire air pressure and a resilient member 11 for controlling the valve. A float 12 that is elastically biased toward the main body 1 side is provided, and the position of the float 12 that moves inside the cover 4 under pressure can be read on the air pressure display section 8 of the cover 4. A tire valve characterized by comprising: