JPS5811801A - Method and device for inspecting liner gauge of vulcanized tire - Google Patents

Abstract

PURPOSE:To detect the thickness of a liner over the entire internal circumferential surface by inserting a liner gauge inspection head into a tire held in a running attitude from its bead part, and then moving up a liner gauge sensitive part along the tire internal surface. CONSTITUTION:After a tire T is held in a running state, a liner gauge inspection held KC is inserted into the tire T from its bead part and the tip of the inspection head KC is abutted on the center part of the intenal surface of the tire T. Then while the tire T is rotated, the inspection head KC is lowered and in accordance with the lowering, liner gauge sensitive parts fitted to holders 30a and 30b of the inspection head KC are moved up along the internal surface of the tire T. Consequently, the thickness of the liner gauge of the tire T, i.e. the liner is detected automatically over the entire internal circumferential surface of the tire T.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for inspecting a liner gauge of a vulcanized tire, and more particularly, the present invention relates to a method and apparatus for inspecting a liner gauge of a vulcanized tire, and more particularly, the present invention relates to a method and apparatus for inspecting a liner gauge of a vulcanized tire having a steel carcass structure. The present invention relates to a method and apparatus for testing.

Conventionally, the thickness of the inner liner of a tire with a steel carcass structure has been visually inspected after vulcanization. However, visual inspection
If the liner wall thickness, that is, the liner gauge, is extremely thin, you can tell because the steel carcass is exposed or there are irregularities along the steel cord, but if the liner gauge is about 0.5 to 1.0 Despite having a negative impact on tire performance, it is difficult to detect through visual inspection.

Therefore, a tactile test is also used, but the current situation is that the results obtained are almost the same as those obtained by the visual test described above.

Recently, inspection devices using radiation have also appeared, but these devices are not only large-scale and expensive, but also have problems such as complicated operation and maintenance.

The object of the present invention is to provide an excellent method and apparatus for inspecting a liner gauge of a vulcanized tire, which eliminates the above-mentioned problems and can automatically inspect the thickness of the liner over the entire inner peripheral surface of the vulcanized tire. It is to do so.

The feature is that after the tire is held in a running position, a liner gauge inspection head is inserted into the tire from the bead, and the tip of this inspection head is brought into contact with the center of the inner surface of the tire. By lowering the inspection head while rotating the tire and moving the liner gauge sensitive part of the inspection head upward along the inner surface of the tire, the liner gauge of the tire, that is, the wall thickness of the liner is measured. is automatically detected over the entire inner circumferential surface of the tire.

Hereinafter, the present invention will be explained in detail by way of examples with reference to the drawings.

First, the apparatus directly used for carrying out the method according to the present invention will be described.

Fig. 1 is a partially cutaway front view showing a liner gauge inspection device for vulcanized tires according to an embodiment of the present invention, Fig. 2 is a top side view of the same, and Fig. 3 is an enlarged front view showing two main parts of the same. Ship number 4
The figure is a side view of the same, FIG. 5 is an enlarged front view of a portion of the liner wall thickness sensor, and FIG. 6 is a side view of the same.

In the figure, K is a vulcanized tire liner gauge inspection device according to an embodiment of the present invention, and one side 1 of a frame 19
a tire rotating device Ka provided on the other side 19b of the frame 19; a tire holding device Kb for holding the tire T(O) on the tire rotating device Ka in a running position; and a tire rotating device Kb provided on the other side 19b of the frame 19. An inspection head drive device Kd that moves the liner gauge inspection head Kc into and out of the tire T held on Ka and moves it up and down.
The liner gauge inspection head Kc is configured such that the liner gauge sensitive part moves upward along the inner surface of the tire T as the tip of the liner gauge inspection head Kc is pressed down.

To further explain this structure, the tire rotation device Ka
As shown in FIG. 2, a drive roll 13 and a free roll 15 rotated in a predetermined direction by a drive motor (not shown) are mounted on bearings 14 on the left and right sides of one side 19a of the frame 19.
a, 14b and 16a.

It is configured by attaching via 16b,
During the inspection, the tire T, which is held in a running position by a tire holding device Kb (described later) on each of the rolls 13 and 15, is rotated, and the tire T is automatically centered by the left and right rolls 13 and 15. It is now possible to do so. In addition, this tire rotation device Ka
(4) As shown in FIG. 2, there is provided a kicking device Ke for kicking out the inspected tire T from the device K. This kicking device Ke is connected to each row/row of the tire rotating device Ka mentioned above.
An L-shaped kicking arm 17 is positioned between 1/13 and 15 and is rotatably pivoted to the frame 19" via a bearing, and the base is pivoted to the frame 19, and the rod 18a is attached to the frame 19". It consists of an air cylinder 18 pivoted to the base 17a of the arm 17, and the air cylinder 1
8, the kicking arm 17 is actuated and the inspected tire T can be kicked out of the machine.

The tire holding device Kb is positioned above the tire rotating device Ka as shown in FIGS. 1 and 2, and the liner gauge inspection head K is mounted on a frame (not shown).
There are two lower guide rolls 11a on each of the left and right sides so that c can be put in and taken out from the side.

11b l llc, 11d and upper guide roll 12
a, 12b.

12c and 12d, and each guide roll can rotatably hold the tire T carried onto the tire rotating device Ka in a running position. Note that the distance between the left and right guide rolls described above can be adjusted in accordance with the size of the tire.

Next, the structure of the above-mentioned inspection head drive device Kd and the liner gauge inspection head Kc installed therein will be explained in detail.

As shown in FIG.
Bearings 5 are mounted on linear ways 4a and 4b that are fixed upright on 9a.
The air cylinder 1 is attached to the square pipe 34, and the cylinder rod 1a passes through the through hole provided in the square pipe 34. It is connected to the square pipe 9.

Also, the rod 1 of the electric cylinder 10 is attached to this corner/guive 9.
0a is connected, while the electric cylinder 10 is connected to the frame 19
is connected to. Therefore, unless the cylinder rod 10a of the electric cylinder 10 operates, the square vibrator 9 cannot move up and down. When the cylinder rod tea of the electric cylinder 10 operates, the cylinder rod 10a moves upward or downward, that is, the square pipe 9 and the square pipe 6
4 operate simultaneously. On the other hand, when the cylinder 1 fixed to the square vibro 4 is actuated, when the cylinder rod 1a is out, the square pipe 9 connected to the rod with a pin is fixed to the frame 19 via the electric cylinder 10. , the cylinder 1 pushes up the square pipe 34. When the air pressure of the cylinder 1 is switched, the cylinder 1 moves down the square vibro 4.

With this structure, the rectangular vibro 4 can be lowered by operating the cylinder 1, and then the rectangular pipe 34 can be further lowered (or raised) by the electric cylinder 10. Conversely, when the rod 10a of the electric cylinder 10 is raised, the square pipes 9, 34 are raised, and then the air cylinder 1 is operated, and when the cylinder rod 1a is out, the square pipes 34 are raised.
further rises and moves to the stroke end.

In addition, the cylinder 2, which together with the cylinder 1 described above constitutes the inspection head drive (7) movement MKd, is connected to the cylinder mounting plate 3.
5, and its cylinder rod 2a is fixed to a square pipe 7 via a pin. The square pipe 34 has a bearing 6a.

6b is fixed, and a linear way 49 fixed to the square pipe 7 slides on the bearing. Therefore, when the cylinder 2 is actuated, the square pipe 7 moves left and right.

Furthermore, a cylinder 3, which together with the cylinders 1 and 2 described above constitutes an inspection head drive device Kd, is connected and fixed to the square pipe 7 with a pin. And the cylinder rod 7
a is connected to the arm 40 by a pin. A bearing 66 is integrated at the tip of the square pipe 7, and the bearing 3
7.68, a shaft 69 constituting the liner gauge inspection head Kc can be rotated. The shaft 69 and the arm 40 are fixed, and the stroke of the cylinder A is set so that the arm 40 turns 90 degrees when the rod 3a of the cylinder 3 is extended and at the return limit. Furthermore, an arm 20 constituting the linerage (8) and one-stage inspection head Kc is fixed to the shaft 39. Bearings 21a and 21b are fixed to this arm 20, and a guide rod 2 fixed to a holder 43 is fixed to the arm 20.
2a and 22b move up and down. Guide rod 22a
, Stop near the upper edge of 22b @ 45a , 45
b is the installation. The guide rods 22a, 22b
slides down the bearings 21a, 21b ]-, and the bearing 2
Retaining rings 45a and 45b contact 1a and 21b and act as stoppers. A bearing 41 is fixed to the lower side of the holder 43 by a shaft 42. The bolt 44 is attached to the holder 43 and serves as a stopper when the arm 20 is lowered.

Arm 20 and joints 26a and 26b are pin 23
a.

23b, and the holder 43 and arm 25a.

25b is connected with set screws 24a, 24b, and is connected to arms 25a, 25b and joints 26a, 26b.
is pin 46a.

46b. Here pin 23a + 23
b.

Pins 46a, 46b, set screws 24a, 24b
The axes of the pins 238 to 23b and set screws 24a to 24b on the same plane are parallel, and the axes of the pins 23a and 23b and set screws 24a and 24b are parallel to each other. The line connecting the midpoints of pins 23a to 23
It is in a positional relationship perpendicular to the line connecting the axes that connect b. Further, the axial distances between the pins 23a to 46a and the pins 23b to 46b are set to be equal, and the axial distances between the pins 46a to the set screw 24a and the pins 46b to the set screw 24b are set to be equal.

Therefore, they are symmetrical with respect to a line connecting the midpoints of the axes of pins 23a and 23b, pins 46a and 46b, and set screws 24a and 24b. Also, a guide rod 22a.

Since the axis of 22b is also set parallel to this line, the holder 4
3 is fixed and the arm 20 is lowered, the arm 26a,
26b pivots around pins 23a and 23b (the figure to the right of the center in FIG. 3 shows the arm 20 in a lowered state).

Bearings 27a and 27b are attached to the joints 26a and 26b.
and bearings 27c and 27d are fixed. Guide rods 28a, 28b, 28e, 28d are arranged in each bearing, and shaft centers 28a, 28b, 28c are provided.
and 28d are provided in parallel. The guide rod is joint 33a.

Guide rods 28a, 28b, 28c, 28d fixed to 33b (see FIGS. 5 and 6)
A retaining ring is provided at the upper end of the bearing 27a.
, 27b, 27c.

27d to prevent the guide rods from falling out (retaining rings 45a and 4 of the guide rod 22).
(Same as 5b). Joints 33a, 33b and bearing 2
Guide rod 22a between 7a, 27b, 27c, and 27d.

A spring 29a is installed on the outside of 22b, 22c, and 22a.
, 29b, 29c.

29d is included. The joints 33a and 33b are connected to the bearing 27a in the axial direction of the guide rod by the force of the spring.

Lower side of 27b, 27c, 27d (joint 3
6However, it is pressed by 1). When the joint 66 is pushed upward, it can be moved until the springs 29a, 29b, 29c, and 29d come into close contact.

Joints 33a and 33b have screws 31a and 3
1b, 31c.

31d is attached, and the holders 30a and 30b are fixed by the pin portion at the tip, which is the same as each screw. Each holder 30a, 30b can swing about an axis connecting screws 31a and 61b and screws 31e and 31d. Liner gauge sensitive parts, that is, sensors 62a and 62b are fixed to the holder slots Oa and 30b with W nuts 47. Between the sensor 32 and the holder 30 (
11) has a gap, and the holder 30 is threaded so that the sensor 62 can be cooled with air supplied from the air hose. It is preferable that the radius of the portion of the holder 30 that contacts the inner surface of the tire is approximately similar to the curvature of the cross section of the tire (see FIG. 3) (radius R is shown in FIG. 6). Further, both edges of the R portion of the holder 60 shown in FIG. 6 are slightly rounded to make it easier to slide on the inner surface of the tire. Screws 31a and 31 that hold the holder 30 in place
b.

The fulcrums of 31c and 31d are as low as possible (tire T
It is preferable that the curvature R of the lower m of the holders 30a and 30b automatically matches the curvature of the inner surface of the tire.

Since the sensors 32a and 32b are fixed so that the bottom surfaces of the holders 30a and 30b are located a few inches from the bottom of the holders 30a and 30b, the holders 30a and 30b are in contact with the inner surface of the tire T, and the sensors 32a + 32b are not in contact with the inner surface of the tire T. .

Next, the operations of the liner gauge inspection head Kc and inspection head driving device Kd described above will be explained.

(12) Symbols E, F, and G in FIG. 1 indicate the respective positions of the bearings 66, and the state of E means that the tire T is transferred from the previous process to the drive roll 16 of this device. This is a case where the tire T, which has been inspected by moving onto the roll 15 or by the kicking arm 17 of this device, is sent to the next process. The state of E is the inspection head drive device K.
d, the cylinder rod of cylinder 1 is at the extension limit, the cylinder rod of cylinder 2 is at the return limit, and the cylinder rod of cylinder 3 is at the return limit. ), the cylinder rod of the electric cylinder 10 is at the return limit. Next, the tire T is attached to the drive roll 13 of the device. The tire T is placed on the roll 15 and rotated by the tire rotation device Ka, and the tire T is rotated by the tire rotation device Ka.
Guide rolls 12a, 12b, 1 constituting b
2c, 12d and guide o w 11 a +11
Centered from both sides with b l 1ie l 11d. The guide rolls 12a, 12c and 12b, 12d, and the guide rolls lla, llc and 11b and 11d are interlocked so that the distances drawn perpendicularly to each guide roll from a plane passing through section F in FIG. 1 are always equal. Therefore, the center in the width direction of the tire T centered by each guide roll is always constant regardless of the tire width, and is located on the vertical plane of section F in FIG.

Next, cylinder 2 moves to section E or section F. A liner gauge inspection head Kc is installed between both beads of the tire T.
enters. In state F, the cylinder rod of cylinder 2 is at its extension limit, and the rest remain in the state of part E.

Next, the liner gauge inspection head Kc enters the inner surface of the tire T, or the cylinder rod of the cylinder 1 reaches its return limit.

At this time, the inner surface of the tire and the liner gauge inspection head K
The tip end portion c, that is, the bezel ring 41 is not in contact with the inner surface of the tire. The liner gauge inspection head Kc is rotated by 90 degrees by the cylinder 3 and becomes oriented as shown in FIG. 1 or 3. Next, the cylinder rod of the electric cylinder 10 is lowered and the holders 30a and 30b of the liner gauge inspection head Kc come into contact with the inner surface of the tire T. When the cylinder rod of the electric cylinder is further lowered, the bearing 41 rolls on the inner surface of the tire. Furthermore, the cylinder rod 1 of the electric cylinder 10
When 0a is lowered, the arm 20 is lowered and the holder 30a is lowered.
, 30b slides on the inner surface of the tire and moves from part of the shoulder to the side part.

Since the tire is rotating, the holder 30 of the liner gauge inspection head Kc can trace almost the entire inner surface of the tire T by slowing down the descending speed of the electric cylinder 10. If the electric cylinder 10 is stopped at any position, the holder 3
It is possible to inspect the part where 0 is in contact with the inner surface of the tire T.

Therefore, depending on the relative relationship between the rotational speed of the tire T and the speed of the electric cylinder 10, the inner surface of the tire T can be formed into a spiral shape.
The holder 30 can be traced in a ring shape or over the entire surface to inspect the liner gauge, that is, local non-uniformity in the wall thickness of the liner.

Next, the cylinder rod 10a of the electric cylinder 10 rises and returns to its original position. Then, the sensitive part of the liner gauge inspection head Kc moves away from the inner surface of the tire T. Next, the cylinder rod 3a of cylinder O becomes the return limit, and the liner gauge inspection head Kc rotates 90 degrees. Next, the cylinder port (15) of the cylinder 1 reaches its limit and moves from the G section to the F section.

Next, the cylinder rod 2a of cylinder 2 becomes the return limit, and F
The part moves to part E and returns to the initial state.

When the tire T is placed on the drive roll 13 and the roll 15,
It is preferable that the core of the liner gauge inspection head Kc moves on an extension line of each of the maximum and minimum center points of the tire outer diameter. This is because when each tire size is used in common, the space below the tire bead is maximized, the liner gauge inspection head Kc can be easily inserted and removed from the inner diameter of the tire T, and the holder 30 is mounted on the inner surface of the tire. Holder 3 in the direction that connects the axes of screws 31a and 31b when they are in close contact.
This is necessary to ensure that the 0 and the inner surface of the tire are always evenly in contact with each other. Also, when the tire is large or small, and the inner profile differs, the holders 30a and 30b always hold the spring 2.
Tire T at 9a, 29b, 29c, 29d
so that it is pressed against the inner surface of the

Liner gauge sensitive section, ie sensor 32a.

32b uses a sensor that can detect the distance to the metal of the innermost steel carcass, and sets the minimum (or maximum) liner gauge of the tire (16) in advance, that is, the necessary liner thickness, and then removes the steel from the inner surface of the tire. The thickness up to the carcass layer is detected by sensors 32a and 32b, and if it is thinner (or thicker) than a set value, the tire is rejected without being sent to the next process.

As described above, after a tire is held in a running position, the liner gauge inspection head is inserted into the tire from the bead, and the tip of the inspection head abuts the center of the inner surface of the tire. After that, the inspection head is lowered while rotating the tire, and as the tire is lowered, the liner gauge sensitive part of the inspection head is moved upward along the inner surface of the tire. The thickness can be automatically detected over the entire inner circumferential surface of the tire.

Therefore, the present invention not only enables inspection of liner gauges of vulcanized tires with extremely high efficiency, but also reduces equipment costs, running costs, and safety compared to conventional equipment that uses radiation.

It is superior in terms of equipment space, etc.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing a liner gauge inspection device for vulcanized tires according to an embodiment of the present invention, Fig. 2 is a side view of the same, and Fig. 3 is an enlarged front view showing the main parts of the same. , 4th
5 is an enlarged front view of the liner wall thickness sensor portion, and FIG. 6 is a side view of the same. 19... Frame, Ka... Tire rotating device, Kb...
- Tire holding device, Kc - Liner gauge inspection head, Kd... Inspection head drive device, 32... Liner gauge sensitive section. Agent Patent Attorney Makoto Ogawa − Patent Attorney No [1 Ken Teru Patent Attorney Kazuhiko Saishita (19)

Claims (1)

[Scope of Claims] 1. After holding the tire in a running position, inserting a rad into the tire from its bead portion to the liner gauge inspection, and bringing the tip of the inspection head into contact with the center of the inner surface of the tire;
After that, it was evening. By lowering the inspection head while rotating the ear, and moving the liner gauge sensitive part of the inspection head upward along the inner surface of the tire as it descends, the liner gauge of the tire, that is, the wall thickness of the liner, is measured. A liner gauge inspection method for vulcanized tires that automatically detects the entire inner circumferential surface. 2. A tire rotating device is provided on the frame, and a tire holding device that holds the tire in a running position is arranged on the tire rotating device, and a liner gauge inspection head is moved into and out of the tire held by the tire rotating device. and a liner gauge inspection device for a vulcanized tire, wherein the liner gauge inspection head is configured to be movable up and down, and the liner gauge sensitive part moves upward along the inner surface of the tire as the tip of the liner gauge inspection head is depressed. .