JPH0475444B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a liner gauge inspection device for vulcanized tires, and more specifically, it is used to measure the wall thickness of an inner liner in a vulcanized tire with a steel carcass structure. This invention relates to a liner gauge inspection device that automatically inspects the entire inner peripheral surface.

[Conventional technology]

Conventionally, the thickness of the inner liner of a tire with a steel carcass structure has been visually inspected after vulcanization.

[Problems to solve the problems of the invention]

However, in visual inspection, if the liner wall thickness, i.e., the liner gauge, is extremely thin, the steel carcass is exposed or there is unevenness along the steel cord, which can be detected, but the liner gauge is 0.5 to 1.0 mm. Although it has a negative effect on tire performance,
It was difficult to detect by 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.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and is an excellent liner gauge inspection method for vulcanized tires that can automatically inspect the thickness of the liner over the entire inner peripheral surface of the vulcanized tire. The purpose is to provide a device.

[Means for solving the invention]

In order to achieve the above object, the present invention includes a tire holding device that holds the tire in a running position on a tire rotating device installed on a frame, and a tire holding device that holds the tire in a running position, and a tire rotating device that holds the tire in a running position on the side of the tire holding device. An inspection head drive device is installed to drive a liner gauge inspection head held above to inspect the wall thickness of the inner liner of a tire in a vertically movable, rotating, and horizontally movable manner, and the liner gauge inspection head is driven by the inspection head drive device. It has a link mechanism consisting of two joints connected to the ends of arms connected to the device, two arms connected to the ends of the joints, and a holder connected between the ends of the arms. A holder is provided at the tip of the joint of this link mechanism, which is movable together with the joint and which can come into contact with the inner surface of the tire via a guide rod that is biased in the opposite direction to the tip of the joint. The gist of the present invention is to provide a liner gauge sensing portion for detecting the wall thickness of the inner liner, and to provide the holder of the link mechanism with an abutting member that comes into contact with the inner surface of the tire as the arm descends.

[Action of the invention]

The present invention is constructed as described above, and after holding the tire in a running position, inserting the liner gauge inspection head into the tire from the bead part, and bringing the tip of the inspection head into contact with the center of the inner surface of the tire, Thereafter, 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, thereby measuring the liner gauge of the tire, that is, the wall thickness of the liner. is automatically detected over the entire inner circumferential surface of the tire.

[Embodiments of the invention]

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

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

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 essential parts of the same. Figure 4 is a side view of the same as above, Figure 5 is an enlarged front view of the liner wall thickness sensor section, and Figure 6 is an enlarged front view of the liner wall thickness sensor.
The figure is a side view of the same as above.

In the figure, K is a vulcanized tire liner gauge inspection device according to an embodiment of the present invention, which includes a tire rotating device Ka provided on one side 19a of a frame 19, and a tire T running on this tire rotating device Ka. a tire holding device Kb that holds the tire in a posture; and an inspection head drive device that is provided on the other side 19b of the frame 19 and moves the liner gauge inspection head Kc into and out of the tire T held on the tire rotation device Ka, and raises and lowers the liner gauge inspection head Kc. Kd, and the liner gauge inspection head Kc is constructed 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 depressed.

To further explain this structure, the tire rotation device Ka includes a drive roll 13 and a free roll 15, which are rotated in a predetermined direction by a drive motor (not shown), on one side 19a of a frame 19, as shown in FIG. Bearings 14a, 14b and 16 on the left and right sides of
a, 16b, and rotates the tire T, which is held in a running position on each roll 13, 15 by a tire holding device Kb (described later), at the time of inspection. , 15, the tire T can be automatically centered. Further, below the tire rotating device Ka, there is provided a kicking device Ke for kicking out the tire T after the inspection from the device K, as shown in FIG. This kicking device Ke is an L-shaped kicking arm 17 that is positioned between the rolls 13 and 15 of the tire rotating device Ka described above and is pivotably mounted on one side 19a of the frame via a bearing.
Then, the base is pivoted to the frame 19, and the rod 1
8a and an air cylinder 18 which is pivoted to the base 17a of the arm 17, and by operating this air cylinder 18, the kicking arm 17 can be operated and the inspected tire T can be kicked out of the machine. It's becoming like that.

The tire holding device Kb is positioned above the tire rotation device Ka as shown in FIGS. 1 and 2, and is mounted on both the left and right sides so that the liner gauge inspection head Kc can be inserted into and taken out from the side of the frame (not shown). Two lower guide rolls 11a, 1
1b, 11c, 11d and upper guide roll 12
a, 12b, 12c, and 12d, and each guide roll rotates the tire rotation device.
The tire T carried onto Ka can be rotatably held 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 each tire.

Next, the above-mentioned inspection head drive device Kd and the liner gauge inspection head attached to it.
The structure of Kc will be explained in detail.

The square pipes 34 and 9 constituting the inspection head drive device Kd are attached to a frame 19c that is erected on the other side 19b of the frame 19, as shown in FIG.
Bearings 5 are attached to linear ways 4a and 4b fixed to
The air cylinder 1 is attached to the square pipe 34, and the cylinder rod 1a is
The square pipe 34 is connected to the square pipe 9 through a through hole provided therein. Further, a rod 10a of an electric cylinder 10 is connected to this square pipe 9, and the electric cylinder 10 is connected to a frame 19c. Therefore, if the cylinder rod 10a of the electric cylinder 10 does not operate, the square pipe 9
cannot be moved up or down. When the cylinder rod 10a of the electric cylinder 10 is operated, the cylinder rod 10a moves upward or downward.
That is, the square pipe 9 and the square pipe 34 operate simultaneously. On the other hand, when the cylinder 1 fixed to the square pipe 34 is actuated, the square pipe 9 connected to the rod with a pin is fixed to the frame 19 via the electric cylinder 10 when the cylinder rod 1a is extended. Since the cylinder 1 is bent, the square pipe 34 is pushed up. When the air pressure of the cylinder 1 is switched, the cylinder 1 moves down the square pipe 34.

With such a structure, the rectangular pipe 34 can be lowered by actuation of the cylinder 1, and then the rectangular pipe 34 can be further lowered (or raised) by the electric cylinder 10. On the contrary, electric cylinder 10
When the rod 10a is raised, the square pipes 9 and 34 are raised, and then the air cylinder 1 is operated, and when the cylinder rod 1a is released, the square pipe 34 is further raised and moved to the stroke end.

Further, the cylinder 2, which together with the cylinder 1 described above constitutes the inspection head drive device Kd, is fixed to a square pipe 34 via a cylinder mounting plate 35.
The cylinder rod 2a is fixed to a square pipe 7 via a pin. The square pipe 34 has a bearing 6
a and 6b are 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. The cylinder rod 3a is connected to an arm 40 by a pin. A bearing 36 is integrated at the tip of the square pipe 7, and a shaft 39 constituting the liner gauge inspection head Kc can be rotated via the bearings 37, 38. This axis 3
9 and the arm 40 are fixed, and the stroke of the cylinder 3 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 liner gauge inspection head Kc is fixed to the shaft 39. Bearings 21a and 21b are fixed to this arm 20, and guide rods 22a and 22b fixed to a holder 43 move up and down. A retaining ring 45a is located near the upper end of the guide rods 22a and 22b.
45b is attached. Said guide rod 22
a and 22b slide down on the bearings 21a and 21b, and retaining rings 45a and 45b are attached to the bearings 21a and 21b.
is a hit and a stopper. A contact member 41 is fixed to the lower side of the holder 43 by a shaft 42 and is rotatable in contact with the inner surface of the tire as the arm 20 descends. The bolt 44 is attached to the holder 43 and serves as a stopper when the arm 20 is lowered.

Next, the configuration of the link mechanism disposed at the tip of the arm 20 and the engagement relationship with the runner gauge sensing section will be described. Arm 20 and joint 26
a, 26b are connected by pins 23a, 23b, and the holder 43 and arms 25a, 25b are connected by setscrews 24a, 24b.
5b and joints 26a, 26b are pins 46a,
46b. Here pins 23a, 2
3b, pins 46a, 46b, set screws 24a, 2
4b are perpendicular to the same plane, and the pins 23a to 23b and set screw 24 on the same plane
The axes of a to 24b are parallel, and the pins 23a and 2
3b, a line connecting the midpoints of the axes of the setscrews 24a and 24b is perpendicular to a line connecting the axes of the pins 23a to 23b.
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, pins 23a and 23b, pins 46a and 46
(b) It is symmetrical with respect to a line connecting the midpoints of the axes of the setscrews 24a and 24b. Furthermore, since the axes of the guide rods 22a and 22b are also set parallel to this line, when the holder 43 is fixed and the arm 20 is lowered, the arms 25a and 25b will be attached to the setscrews 24a and 25b.
24b as the center, joints 26a, 26
b is connected to pins 23a and 23b via the link mechanism described above.
(The figure to the right of the center in FIG. 3 shows the state in which the arm 20 is lowered).

In addition, the liner gauge sensitive section or sensor 32
The bearings 27a, 2 are attached to the joints 26a, 26b.
7b, 27c, 27d, guide rod 28a, 2
8b, 28c, 28d, joint 33a, 33
To the holders 30a and 30b provided via b,
Since they are attached to each other, when the arm 20 is lowered, it can make a fan-shaped movement (swivel) around the pins 23a and 23b via the link mechanism, as shown in FIG. 7 (the hatched portion in FIG. 7 is The line L indicates the operating range of the liner gauge sensitive section 32.
is the maximum operating locus of holder 30a, and line M is holder 3
0a).

Next, the joints 26a, 26b, the bearing 2
7a, 27b, 27c, 27d, guide rod 2
8a, 28b, 28c, 28d, joint 33
a, 33b, holder 30a, 30b, sensor 32
The engagement relationship will be explained in detail. Bearings 27a, 27b and bearing 2 are attached to joints 26a and 26b.
7c and 27d are fixed. Guide rods 28a, 28b, 28c, and 28d are attached to each bearing, and axes 28a, 28b, 28c, and 28d are provided in parallel. The guide rods are fixed to joints 33a and 33b (see FIGS. 5 and 6). Guide rod 28a, 2
Retaining rings are attached to the upper ends of the bearings 27a, 27b, 27c, 27.
d, each guide rod is designed to prevent it from falling out (retaining ring 45 of guide rod 22).
a, 45b). Joint 33a, 33b
Springs 29a, 29b, 29c, and 29d are installed outside the guide rods 28a, 28b, 28c, and 28d between the bearings 27a, 27b, 27c, and 27d. The joints 33a, 33b move the bearings 27a, 27b, 2 in the axial direction of the guide rod by the force of the spring.
7c and 27d are pushed to the lower side (joint 33 side). When joint 33 is pushed upward, spring 2
It can be moved until 9a, 29b, 29c, and 29d are in close contact with each other. Screw 3 is attached to joints 33a and 33b.
1a, 31b, 31c, 31d are attached,
It is the same as each screw, and the pin part at the tip is the holder 30a,
30b is fixed. Each holder 30a, 30
b is designed to be able to slide on an axis connecting screws 31a, 31b, and screws 31c and 31d. A liner gauge sensing section, that is, a sensor 32 is fixed to the holders 30a and 30b with W nuts 47. Between the sensor 32 and the holder 30 is
The holder 30 is threaded so that the sensor 32 can be cooled with air supplied from the air hose 48.
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). or,
Both edges of the R portion of the holder 30 in FIG. 6 are slightly chamfered to make it easier to slide on the inner surface of the tire. Screws 31a, 31b, 31c fixing the holder 30,
It is preferable that the fulcrum of the holder 31d is set as low as possible (in the direction of the surface where the inner surface of the tire T and the holder contact), so that the curvature R of the lower surface of the holders 30a and 30b easily matches the curvature of the inner surface of the tire. Since the lower surface of the sensor 32 is fixed several mm above the lower surface of the holders 30a, 30b, the holders 30a, 30b come into contact with the inner surface of the tire T.
Sensor 32 does not make contact. With the above configuration, the liner gauge sensitive section 32 can be moved along the inner wall surface of the tire T by lowering the arm 20 via the link mechanism as in the example shown in FIG.

Next, the liner gauge inspection head Kc mentioned above is
The operation of the inspection head drive device Kd will now be explained.

The symbols E, F, and G in FIG. This is a case where the tire T, which has been inspected by the kick-out arm 17, is sent to the next process. E condition is cylinder 1 of the inspection head drive device Kd.
The cylinder rod of cylinder 2 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 the return limit. Next, tire T
enters the drive roll 13 and roll 15 of this device, and the tire T is rotated by the tire rotation device Ka, and the guide rolls 12a, 12b, 12c, 12d and guide rolls 11a, 11b, 11c that constitute the tire holding device Kb are rotated by the tire rotation device Ka. , 11d from both sides. The guide rolls 12a, 12c and 1
2b, 12d, guide rolls 11a, 11c and 1
1b and 11d are interlocked. 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 inserted between both beads of the tire T. In state F, cylinder 2
The cylinder rod is at its limit, and the rest remain in the state of section E.

Next, either 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 tip of the liner gauge inspection head Kc, that is, the contact member 41, are not yet in contact with the inner surface of the tire. cylinder 3
As a result, the liner gauge inspection head Kc is rotated by 90° 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, 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 10 is further lowered, the contact member 41 contacts the inner surface of the tire T and rolls on the inner surface of the tire. Furthermore, the cylinder rod 10 of the electric cylinder 10
When the arm 20 is lowered, the holder 30
a and 30b slide on the inner surface of the tire and move from the shoulder portion to the side portion. Since the tire is rotating, if the descending speed of the electric cylinder 10 is slowed down, almost the entire inner surface of the tire T can be covered by the liner gauge inspection head.
The holder 30 of Kc can be traced. By stopping the electric cylinder 10 at an arbitrary position, the portion where the holder 30 is in contact with the inner surface of the tire T can be inspected. Therefore, depending on the relative relationship between the rotational speed of the tire T and the speed of the electric cylinder 10, the tire T
The holder 30 traces the inner surface of the liner in a spiral shape, a ring shape, or the entire surface, and it is possible to inspect the liner gauge, that is, local non-uniformity in the wall thickness of the liner.

Next, the cylinder rod 10 of the electric cylinder 10
a rises and returns to its original position. Then, the sensitive part of the liner gauge inspection head Kc separates from the inner surface of the tire T. Next, cylinder rod 3a of cylinder 3
becomes the return limit, and the liner gauge inspection head Kc is
Rotate 90°. Next, the cylinder rod of cylinder 1 reaches its limit and moves from section G to section F. Next, 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 free roll 13 and the free roll 15, the liner gauge inspection head is placed on the extension line of the maximum and minimum center points of the tire outer diameter.
It is preferable that the core of Kc moves. This is because when each tire size is used in common, the space in the vertical direction of the tire bead is maximized, the liner gauge inspection head Kc can easily insert and remove the inner diameter part of the tire T, and the holder 30 is tightly attached to the inner surface of the tire. This is necessary in order to ensure that the holder 30 in the direction connecting the axes of the screws 31a and 31b and the inner surface of the tire always come into uniform contact when doing so. Also, the size of the tire,
At small times, the holders 30a, 30b always hold the springs 29a, 29b, 2 due to the difference in the inner profile.
9c and 29d so that they are pressed against the inner surface of the tire T.

The liner gauge sensitive part, that is, the sensor 32 uses a sensor that can detect the distance to the metal of the innermost steel carcass, and sets the minimum (or maximum) gauge of the tire liner gauge, that is, the necessary liner thickness in advance, The sensor 32 detects the thickness from the inner surface of the tire to the steel carcass layer,
If it is thinner than the set value (if it is thicker), the tire is reset without being sent to the next process.

〔Effect of the invention〕

A tire holding device for holding the tire in a running position is disposed on the tire rotating device installed on the frame, and an inner liner of the tire held on the tire rotating device is attached to the side of the tire holding device. An inspection head drive device is installed to drive a liner gauge inspection head for inspecting wall thickness so that it can move up and down, rotate, and move horizontally, and the liner gauge inspection head is connected to the tip of an arm that is connected to the inspection head drive device. It has a link mechanism consisting of two joints, two arms connected to the ends of the joints, and a holder connected between the ends of the arms. A holder is provided that can move with the joint and come into contact with the inner surface of the tire via a guide rod that is biased in the opposite direction to the tip of the joint. A gauge sensitive part is provided, and the holder of the link mechanism is provided with a contact member that comes into contact with the inner surface of the tire as the arm descends, so that the liner gauge of the tire, that is, the wall thickness of the liner, can be adjusted to the entire inner circumferential surface of the tire. It is possible to automatically detect the liner gauge of a vulcanized tire, and therefore it is not only possible to inspect the liner gauge of a vulcanized tire with extremely high efficiency, but also compared to conventional equipment that uses radiation. It is superior in terms of equipment costs, running costs, safety, 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 top side view of the same, and FIG. 3 is an enlarged front view showing essential parts of the same. 4 is a side view of the same, FIG. 5 is an enlarged front view of the liner thickness sensor portion, FIG. 6 is a side view of the same, and FIG. 7 is an explanatory view of the operating range of the liner gauge sensing section. 19...Frame, 20...Arm, 25a,
25b...Arm, 26a, 26b...Joint, 28a, 28b, 28c, 28d...Guide rod, 32...Liner gauge sensitive section, 41...
...Abutting member, 43...Holder, Ka...Tire rotating device, Kb...Tire holding device, Kc...Liner gauge inspection head, Kd...Inspection head drive device.

Claims (1)

[Claims] 1 On the tire rotation device placed on the frame,
A tire holding device that holds the tire in a running position is provided, and a liner gauge inspection head that inspects the wall thickness of the inner liner of the tire held on the tire rotation device is raised and lowered on the side of the tire holding device. The liner gauge inspection head has two joints connected to the tip of an arm connected to the inspection head drive, and two joints connected to the ends of the arms connected to the inspection head drive. It has a link mechanism consisting of two arms connected at the tips and a holder connected between the tips of the arms, and is movable with the joint at the tip of the joint of this link mechanism. A holder is provided that can come into contact with the inner surface of the tire via a guide rod that is biased in the opposite direction to that of the link mechanism. A liner gauge inspection device for a vulcanized tire, further comprising a contact member that comes into contact with the inner surface of the tire as the arm descends.