JP2005091335A - Tire pressure determination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the complicated work of air pressure measurement for a pneumatic tire. <P>SOLUTION: A square through-hole of about 10cm×10cm is bored in a body 2. When the tire in a boarding weighted state is put on the part of narrow peripheries 3 and 4 of the through-hole, the intermediate point of 3 and 4 located at the bottom of the tire circumferential grounding part which is floating according to the degree of pressure state of the tire makes contact with a horizontal measuring bar 5 to press down it, and a sector gear mounted on the rotating shaft 6 drives a gear mounted on a display drum through an intermediate gear in a speed increasing state. Therefore, a pneumatic amount display scale is rotated to a position where 5 attached to 6 is pressed down and stopped to show the recessed distance of the tire=about the tire pneumatic pressure. When the tire is removed after completion of measurement, the arm shaft of 6 and the horizontal measuring bar 6 are returned to the position before measurement by dint of a mounted return spring and laid in a waiting state. Protruding stoppers are provided on lateral bottom sides of the inner wall of the square hole to prevent the excessive rotation of the arm of 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to simple air pressure measurement of an air-filled tire used as a moving means.

  Conventionally, the air pressure of an air-filled tire is measured by loosening the cap of the air-filling valve of the tire and pressing the pressure gauge or looking at the display of the pressure gauge attached to the compressed air filling tank of the pump. Is increased or decreased. In addition, since the air pressure inside the tire cannot be measured from the outside with a valve using an English-style rubber pipe in a bicycle, etc., the tire pressure in the state where the tire pressure is actually measured by pushing the hardness of the tire with a finger or actually riding it. The air pressure was checked by looking at the air pressure, or the pressure gauge attached to the pump when filling the air.

  The internal pressure of the pneumatic tire decreases with time, and when the internal pressure falls below a certain value, air refilling work is always required. In order to check the internal pressure of the tire, it is at least necessary to remove the valve cap and press the pressure gauge.Because it is impossible to measure the air pressure by temporarily releasing the valve from the outside, the English type valve such as a bicycle cannot be measured. Trying to push the tire stiffness with your finger or actually riding for a while and then knowing the lack of air pressure is real, and tires with any type of valve are generally annoying work tasks .

  In order to solve the above-mentioned problem, paying attention to the fact that the internal pressure of the weighted pneumatic tire and the dent amount of the ground contact surface are in an inversely proportional relationship, the ground contact is made only in a certain small area so as to push the tire with the finger. We thought that it would be possible to know the tire pressure to some extent by measuring the distance that the tire is recessed by applying weight. Therefore, in order to measure the dent distance due to riding load, as shown in the top view of FIG. 3 and the side view of FIG. 1, when a tire loaded with riding weight is placed on the narrow periphery 3, 4, part of the tire, the tire contact surface floats up from the ground, and depending on the tire air pressure state, either of those shown in FIGS. Become close. In this state, the horizontal measurement bar 5 supported by the arm from the rotating shaft 6 touches the point at the bottom of the tire outer peripheral grounding part floating in this state, the intermediate point 3 and 4 shown in FIG. In order to drive the 11 gear attached to the display drum 12 through the intermediate gear 10 in an accelerated state by the sector gear 8 attached to the rotating shaft 6 and pushed down to the lower part of the outer periphery of the tire that has been levitated. The slight movement of the arm shaft increases to a rotation angle of about 22 times equal to the gear ratio, and the air pressure amount display scale 14 printed on 12 rotates to the position where 5 attached to 6 is pushed down together with 12 and stopped. , Tire recess distance = approximate tire filling air pressure. When the measurement is completed and the tire is removed, the arm shaft 6 and the horizontal measurement bar 5 are returned to the pre-measurement position shown in FIG. 4 by the return rotational force of the return spring 9 attached to 8. The stopper 13 prevents the six arms from rotating more than necessary.

  As described above, the device of the present invention allows anyone to easily determine whether the pneumatic tire pressure is excessive or insufficient simply by placing the tire on the device while riding. The optimum value and the range up to underfill close to puncture are continuously displayed in real time. The scale of the display drum is also provided with a function for urging filling with an air pump by providing an air shortage determination zone by color coding. Since most bicycle tires used in Japan have used English valves, it is not possible to easily measure the tire pressure using an air pressure gauge. I checked the air pressure in a way that relied on my senses, such as trying to get on a car. It was the present invention that it was thought that it would be possible to judge the excess or deficiency of tire pressure in a way that is a little more reproducible and easily quantified and requires no experience, and this is the commuting school, post office, police, newspaper that always uses bicycles The tire pressure can be easily determined simply by placing it on the bicycle parking lot departure point or arrival point passage and leaving it on the device. Since the structure is simple and the whole can be constructed firmly, it is possible to produce a robust product that does not break even if it is stepped on or placed in a garage and stepped on by a car. Since no electric circuit or the like is used, a battery is naturally unnecessary, and a rainable structure is not impossible. Since the structure is simplified, it can be commercialized at low cost. It is a very inexpensive and easy-to-use device that provides tire pressure detection devices for many people to prevent punctures and accidents caused by insufficient tire pressure.

  Since the structure is simple, the overall configuration and the operation function are as described in the previous section, but in this section, a detailed description is added. In the description of the previous paragraph, the display portion of the air pressure is in accordance with the description of claim 1, and here, the structure of the description of claim 2 will be further described. 3 is removed, the return spring is left and the fan-shaped gear 8 is also removed from the arm shaft 6 and then an arm with a hole for connecting a linkage wire is attached to the 6 so that it can be seen from the top of the main body. A member with a hole in the center of the arc of the fan-shaped display panel 16 is provided at a position, and it is freely rotated so that it is fastened to the main body, and a short arm part is provided on the opposite side of the fan-shaped display panel to make a hole. By connecting this hole and the hole of the arm provided in the previous step 6 with a linkage wire, the movement of 6 is increased by the relationship with the slightly longer arm provided in 6 than the short arm provided in the fan-shaped display board. See FIG. 10 where the scale can be configured to rotate greatly. Further, as a simple structure, a semicircular large-diameter display drum 17 in which a semicircular rotation display scale is directly printed on the arm shaft 6 may be projected roundly from the surface 7 in FIG. 11 and covered with a transparent cover. The large-diameter display drum that protrudes from the surface 7 can be applied to the implementation of claim 1. In any of the display methods, the display scale portion that can be seen from above can be prevented from being damaged by using a thick, strong transparent PET material or the like. In particular, this display part 15 is molded as an integral box shape and has a waterproof and sealed structure, and only one small waterproof rubber packing is used for the shaft 6 part. If 5 and 6 are made of stainless steel or plastic, it can be used as a raindrop. become. If the main body 2 is shaped like a staircase or a slope as shown in the figure, it is easy to put the tire on the measurement, and the thickness of the main body 2 is designed to be as thin as possible so that the boarding position is only about 1.5 cm when riding Is not expensive and easy to use. The measurement square hole provided in the main body 2 has a penetrating structure, so that the overall thickness can be reduced, so that sand, mud, rain water, etc. that have fallen from the tire can be accumulated. It can also be stored.

  Tire pressure determination device and usage state diagram of the present invention   Main mechanism partial view of the present invention   Completion drawing of the tire pressure judging device of the present invention as seen from above   Side view of a measurement standby state including a fluoroscopic display of the tire pressure determination device of the present invention   Excessive air state side view including a perspective display of the tire pressure determination device of the present invention   Side view of the optimum air condition including a perspective display of the tire pressure judging device according to the present invention   Side view of air shortage state including a perspective display of a tire air pressure determination device according to the present invention   End position state side view including a perspective display of the tire pressure determination device of the present invention   Finished product perspective view of tire pressure determination device of the present invention   FIG. 2 is a diagram showing the completed use of the fan-shaped display panel according to claim 2 of the tire pressure judging device according to the present invention.   A tire air pressure judging device of the present invention according to claim 2 using a semi-circle display drum.

Explanation of symbols

1. Air-filled tire 2, main body 3, narrow and horizontally long area 4 on which the tire ground contact portion provided around the main body square hole is placed, narrow and horizontally long area 5 on which the tire ground contact portion provided around the main body square hole is placed, and arm A horizontal measurement bar 6 that is supported and contacts the tire outer peripheral grounding portion, a rotating shaft 7 of an arm that supports the horizontal measurement bar, a main body upper surface portion 8, a sector gear 9, a return spring 10, an intermediate gear 11, a gear 12 that drives a display drum, Display drum 13, air pressure display scale 15 printed on arm stoppers 14, 12, display portion 16, fan-shaped display board 17, semicircular large-diameter display drum

Claims (2)

  In order to temporarily hold and fix the tire ground contact part several centimeters above the ground, a flat trapezoidal body that can be stably placed on the ground is used. A square hole of about centimeters is provided, the tire is dropped, and the tire ground contact portion is supported by two edge portions provided around the square hole, and the floated tire outermost outermost point, which is an intermediate position between the two points, is supported. In order to measure the distance to the bottom of the trapezoidal body in contact with the lower part, a member attached to a swing arm with a straight bar positioned at right angles to the tire rotation direction inside the square hole is provided. By driving a drum display mechanism having a scale on the outer circumference so that the movement of the arm pivot shaft is accelerated and rotated through several gears, Tire air pressure determining apparatus determining the filling pressure by measuring the amount of dent of Ya.   2. The tire pressure judging device according to claim 1, wherein the speed increasing gear of the display mechanism part in claim 1 is omitted and the movement of the swing arm is displayed directly or by using a crank mechanism.