JPH09193628A - Tire inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the embedded depth and circumferential pitch of wires, embedded in a tire, without using X-rays and without lowering measuring accuracy. SOLUTION: A tire 1 is rotated around the center axis of the tire by a tire rotatory-driving means 5 to press a truck 4 to the inner peripheral surface of the tire 1, while the truck 4 is moved in the rotation axis direction of the tire 1 (in the width direction of the tire 1) so as to measure the embedded depth and pitch of wires 2, embedded in the tire 1, by a sensor 3 fitted to the truck 4. The embedded depth and circumferential pitch of the wires 2 embedded in the tire 1 are thereby measured without using X-rays and without lowering measuring accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire inspection apparatus for scanning the inner peripheral surface of a tire to measure the embedded depth and circumferential pitch of the wires embedded in the tire.

[0002]

2. Description of the Related Art A radial tire 1 as shown in FIG.
The tire has a carcass 1'reinforced by a steel wire in the rotation axis direction (width direction). The shape of the carcass 1'before tire assembly is a flat belt shape, which is wound around a drum of a tire molding machine to be deformed in three dimensions and further expanded by applying heat and internal pressure by a vulcanizing press. , The shape shown in FIG.

[0003]

The radial tire 1 shown in FIG. 9 has the following problems. (1) The pitch in the circumferential direction of the steel wire of the carcass 1'is ideally equidistant, but if there is a fragile portion during processing, a gap may occur in the pitch in the circumferential direction of the steel wire. This opening causes the radial tire 1 to have insufficient strength and makes the riding comfort worse. Therefore, it is necessary to measure the circumferential pitch of the steel wire.

Conventionally, X-rays are used for measuring the circumferential pitch of the steel wire, but the X-ray apparatus is expensive. Since it has a negative effect on the human body, shielding is required. It was inconvenient to handle. (2) There is an inner liner inside the carcass 1'to keep the internal pressure, but if the thickness becomes too thin due to a change in the processing process, air leakage may occur, so the inner liner should have an appropriate thickness. Is.

Conventionally, the sensor was directly pressed against the inner peripheral surface of the tire in order to measure the thickness of the inner liner (the embedded depth of the wire), but the sectional shape of the tire in the axial direction is complicated. . In addition, there are many shallow grooves for venting air in the vulcanizing press process, which causes vibration and wear of the sensor, which causes a problem of deterioration of measurement accuracy.

The present invention is proposed in view of the above problems, and an object of the present invention is to embed a wire embedded in a tire into a tire without using X-rays and without lowering measurement accuracy. The present invention aims to provide a tire inspection device capable of measuring the pitch and the circumferential pitch.

[0007]

In order to achieve the above object, a tire inspection apparatus of the present invention comprises a tire rotation driving means for rotating a tire around a central axis of the tire and a tire rotation driving means for rotating the tire. Measures the embedding depth and circumferential pitch of the wire embedded in the tire when the trolley is pressed against the inner peripheral surface of the tire and the tire rotates and the trolley moves relative to the inner peripheral surface of the tire. And a sensor which is attached to the carriage (claim 1).

In the tire inspection apparatus according to the first aspect, the carriage may be supported so as to be movable in the rotation axis direction of the tire (the second aspect).

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a tire inspection apparatus of the present invention will be described with reference to an embodiment shown in FIGS. FIG. 1 is an explanatory view showing an outline of the tire inspection device, FIG. 2 is an explanatory view showing an output of a sensor, FIG. 3 is a side view showing an outline of a tire rotation driving means, and FIG. 4 shows the entire tire inspection device. 6 is a side view, FIG. 5 is a vertical sectional front view taken along the line AA of FIG.
7B is a vertical cross-sectional front view of the bogie portion taken along the line BB in FIG. 7B, FIG. 7A is a side view showing the bogie portion, and FIG. 7B is a side view showing the bogie portion and the movable carriage portion. FIG. 8 is a front view of the bogie portion.

In FIGS. 1 and 3 to 8, 1 is a tire and 2 of FIG.
Is a steel wire of the tire 1, 4 in FIGS. 3 and 6 to 8 is a dolly, 3 is a sensor attached to the dolly 4, 6 is wheels attached to both sides of the dolly 4, and the sensor 3 is a tire inner circumference of the wheel 6. If you install it slightly inside the contact part to the surface, the sensor 3
Moves while maintaining a constant distance without coming into contact with the inner peripheral surface of the tire 1. Signal obtained by this sensor 3 (see Fig. 2)
Are taken out to the outside through wiring (not shown).

Reference numeral 5 in FIGS. 3 and 5 to 7 denotes a total of four frustoconical rollers (tire rotation driving means) for rotatably supporting the tire 1 from below, and two rollers 5 each. It is arranged on two parallel axes, is rotatably attached to the base 17 of FIGS. 4 and 5, and is driven by a prime mover (not shown). 7 is a caster shaft rotatably attached to the dolly 4, and 8 is a dolly holding metal fitting attached to the caster shaft 7. When the dolly 4 is pressed against the inner peripheral surface of the tire 1 and the dolly holding metal 8 is moved, the dolly 4 is As shown in FIG. 6, the tire 1 moves in the rotation axis direction (see the rotation axis direction of FIG. 9) while being pressed against the inner peripheral surface of the tire 1.

Reference numeral 9 denotes a spring interposed between the carriage 4 and the carriage holding metal fitting 8. The spring 9 holds the carriage 4 so as not to fall when the carriage 4 is set on the inner peripheral surface of the tire 1. It is provided to do so. Reference numeral 10 is a guide metal fitting attached to a movable base 14 described later so as to be swingable via a shaft 14b, 11 is a parallel link connecting the guide metal fitting 10 and the carriage holding metal fitting 8,
Reference numeral 12 is a compression spring (compression spring incorporating a shock absorber) interposed between the guide metal fitting 10 and the carriage holding metal fitting 8. By the guide metal fitting 10, the parallel link 11 and the compression spring 12, the carriage 4 is tired. It also moves in the circumferential direction of 1 (see the circumferential direction of FIG. 9) while maintaining a right angle. The carriage 4, the guide fitting 10, the parallel link 11, and the compression spring 12 are two sets on the left and right.

Reference numeral 14 denotes a moving base of the tire inspection device, 14a,
Reference numeral 14a denotes upper and lower support portions provided on the movable table 14, 13a denotes a rack shaft, 13b denotes a screw shaft integrated with the rack shaft 13a, and 1a.
3c is a rotary shaft attached to the screw shaft 13b via a universal joint 23, the rotary shaft 13c is supported by the upper support part 14a so as to be rotatable and vertically movable, and the screw shaft 13b is screwed into a screw hole of the lower support part 14a. However, the rack shaft 13a is provided with the left and right guide fittings 10.
It meshes with the pionin provided in the.

Reference numeral 20 denotes a motor mounted on the moving base 14, and 21
Is a bevel gear attached to the output shaft of the motor 20, and 22 is a bevel gear attached to the rotating shaft 13c and meshing with the bevel gear 21. The motor 20 is driven and its rotation is bevel gear 21 → bevel gear 22 →
The rotary shaft 13c is transmitted to the rotary shaft 13c to rotate the rotary shaft 13c and the screw shaft 13b, and the rotary shaft 13c and the screw shaft 13b are moved up and down, and this movement is transmitted to the rack shaft 13a via the universal joint 23, thereby the rack shaft 13a. The rack shaft 13a and the left and right guide fittings 1 through the peonyins that mesh with the movement of the rack shaft 13a.
0, the guide metal fitting 10 is swung in the vertical direction about the shaft 14b, and the movement is transmitted to the left and right carriages 4 via the parallel link 11 and the carriage holding metal fitting 8 so that the left and right carriages 4 are tired. The opening / closing movement (moving in the approaching direction and the separating direction) is performed in the rotation axis direction (width direction) of 1 (see the rotation axis direction in FIG. 9).

Reference numeral 15 is a cylinder attached to the movable table 14,
The cylinder 15 is used to lift the left and right trolleys 4 that have moved to the closed position as shown in FIG. 4 and to pass the bead portion of the tire 1. 17 is the base of the tire inspection device,
Reference numeral 16 is a support pillar standing on the base 17, and 24 is an arm attached to the support pillar 16. The movable base 14 is supported by the arm 24 so as to be movable in the radial direction of the tire 1.

Reference numeral 18 denotes a positioning roller for the tire 1. Next, the operation of the tire inspection device shown in FIGS. 1 to 8 will be specifically described. When measuring the embedded depth and the circumferential pitch of the steel wire 2 embedded in the tire 1, the tire 1 is supported by each roller 5, and each roller 5 is rotated in the arrow direction of FIG. Rotate in the direction of the arrow in FIG.

At this time, the moving base 14 is moved outward in the radial direction of the tire 1 so that each wheel 6 of the left and right carriages 4 is moved to the tire 1.
Press on the inner surface of. Then, drive the motor 20,
The rotation is transmitted to the bevel gear 21 → the bevel gear 22 → the rotary shaft 13c, the rotary shaft 13c and the screw shaft 13b are rotated, and the rotary shaft 13c and the screw shaft 13b are moved up and down. To the rack shaft 13a, and the rack shaft 13
a is moved up and down, the movement of the rack shaft 13a is transmitted to the left and right guide fittings 10 via the peonyins that mesh with the rack fittings, and the guide fittings 10 are swung in the vertical direction about the shaft 14b, and the movements thereof are linked in parallel. 11 is transmitted to the left and right trolleys 4 via the trolley holding metal fittings 8, and the left and right trolleys 4 are opened and closed in the rotation axis direction (width direction) of the tire 1 (see the rotation axis direction in FIG. 9) (approaching direction and separating direction). Then, the embedded depth and the circumferential pitch of the steel wire 2 embedded in the tire 1 are measured by the sensor 3 attached to each carriage 4.

[0018]

As described above, the tire inspection apparatus of the present invention rotates the tire about the center axis of the tire by the tire rotation driving means to press the truck against the inner peripheral surface of the tire, while the truck is used for the tire rotation. By moving in the direction of the rotation axis and measuring the embedding depth and circumferential pitch of the wires embedded in the tire by the sensor attached to the truck, X
It is possible to measure the embedding depth and circumferential pitch of the wire embedded in the tire without using a wire and without lowering the measurement accuracy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an outline of an embodiment of a tire inspection device of the present invention.

FIG. 2 is an explanatory diagram showing an output of a sensor of the inspection apparatus.

FIG. 3 is a side view showing an outline of tire rotation driving means of the inspection apparatus.

FIG. 4 is a side view showing the entire tire inspection apparatus.

5 is a vertical sectional front view taken along the line AA in FIG.

FIG. 6 is a vertical sectional front view of a bogie portion taken along line BB in FIG. 7 (b).

FIG. 7A is a side view showing a dolly portion of the tire inspection apparatus, and FIG. 7B is a side view showing a dolly portion and a moving pedestal portion.

FIG. 8 is a front view of the bogie portion.

FIG. 9 is a perspective view showing a part of a radial tire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tire 2 wire 3 sensor 4 bogie 5 tire rotation driving means (roller) 6 wheel 7 caster shaft 8 bogie holding metal fitting 9 spring 10 guide metal fitting 11 parallel link 12 compression spring 13a rack shaft 13b screw shaft 13c rotary shaft 14 moving base 15 cylinder

Claims (2)

[Claims] 1. A tire rotation drive means for rotating a tire around a central axis of the tire, and a trolley which is pressed against the inner peripheral surface of the tire rotated by the tire rotation drive means.
And a sensor for measuring the embedded depth and circumferential pitch of the wire embedded in the tire when the tire rotates and the vehicle moves relative to the tire inner peripheral surface. A tire inspection device characterized in that it is attached to. 2. The tire inspection apparatus according to claim 1, wherein the trolley is supported so as to be movable in a rotation axis direction of the tire.