JPH1135141A - Tire rotation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rotate a tire laid sideways smoothly and uniformly. SOLUTION: When a tire T reaches a prescribed position S, a third roller 48 is appeared to the carrying surface of a carrying conveyer 11 and also a second roller 40 is swung so that the other end is lifted and the tire T is contacted with the first/second/third rollers 35, 40, 48 by three points. Next, when the first/second rollers 35, 40 are driven and rotated in the reverse direction, the tire T is rotated around a rotational axis Z, at this time, as a shoulder part in which letters are not provided so much is contacted with the rollers 35, 40, 48, a rotation is carried out smoothly and uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire rotating device for rotating a horizontally placed tire around a tire rotation axis during transport.

[0002]

2. Description of the Related Art As a conventional tire rotating device, for example, one described in Japanese Patent Application Laid-Open No. 8-257460 is known. This is composed of a roller in a horizontal axis posture on which a tire holding a horizontal posture is placed, and the rollers are separately provided on the left and right through the axis of the tire, and the left and right rollers are placed in the same horizontal direction. In the level, they are driven to rotate in opposite directions.

[0003]

However, in such a conventional tire rotating device, a tire in a horizontal posture is rotated while being supported from below by left and right rollers at the same horizontal level, and is rotated. The outer surface of the tire near the maximum width position (the center of the sidewall portion) comes into contact with these left and right rollers. Since the rollers are often spaced apart in the circumferential direction, the rotational speed applied to the tire when the roller is in contact with a letter or the like and when the roller is in contact with the outer surface of the sidewall portion where no letter or the like is present And there is a difference
There is a problem that the rotation of the tire becomes uneven. Further, when a letter or the like comes into contact with the rollers one after another due to the rotation, the tire repeatedly jumps up, which causes a problem that a vertical vibration is generated in the rotating tire.

[0004] It is an object of the present invention to provide a tire rotating device capable of rotating a horizontally placed tire smoothly and uniformly.

[0005]

SUMMARY OF THE INVENTION The purpose of the invention is as follows.
A tire rotating device that rotates the tire around a rotation axis when a horizontally placed tire is transported to a predetermined position by a transport conveyor, and is located immediately below the tire at the predetermined position and upstream of the tire rotation axis. A first roller extending from one end in the width direction to the other end in the width direction of the conveyor, and a first roller provided immediately below the tire at the predetermined position and downstream of the tire rotation axis, and the other end in the width direction of the conveyor. A second roller extending from the second roller toward one end in the width direction, and a third roller provided immediately below the tire at the predetermined position and upstream of the second roller and extending in the transport direction of the transport conveyor at the widthwise central portion of the transport conveyor. Raising and lowering means for raising and lowering the third roller to cause the third roller to protrude and retract on the transport surface of the transport conveyor; and raising the other end of the second roller. By inclining such that the tire at a predetermined position is brought into contact with the first roller, the second roller, and the third roller appearing on the transport surface, respectively, the tire is attached to the first, second, and third rollers. A rotating means for rotating the tire around a rotation axis by applying a rotational driving force to at least one of the first, second, and third rollers when in contact with the tire; By a tire rotating device including a holding unit that holds the tire at a predetermined position to prevent a displacement,
Secondly, a tire rotating device that rotates a tire placed around a rotation axis when a laterally placed tire is transported to a predetermined position by a transport conveyor, wherein the tire is located immediately below the tire at the predetermined position and upstream of the tire rotation axis. Provided on the side,
A first roller extending from one end in the width direction of the conveyor to the other end in the width direction, provided directly below the tire at the predetermined position and downstream of the tire rotation axis, and extending in the width direction from the other end in the width direction of the conveyor. A second roller extending toward one end, and the first roller immediately below the tire at the predetermined position.
A third roller provided downstream of the roller and extending in the transport direction of the transport conveyor at a central portion in the width direction of the transport conveyor, and an elevating unit that raises and lowers the third roller so that the third roller appears and disappears on the transport surface of the transport conveyor. Means and the first
An inclining means for inclining the roller so that one end thereof rises, so that the tire at a predetermined position is brought into contact with the first roller, the second roller and the third roller appearing on the conveying surface, respectively; Rotating means for rotating the tire around a rotation axis by applying a rotational driving force to at least one of the first, second, and third rollers when the tire is in contact with the third roller; ,
This can be achieved by a tire rotating device provided with a holding means for holding the tire at a predetermined position during rotation of the tire to prevent displacement.

In the case of the first aspect of the invention, when the laterally placed tire is transported to a predetermined position by the transport conveyor, the third roller is raised by the elevating means to appear on the transport surface of the transport conveyor. At the same time, the second roller is tilted by the tilting means so that the other end rises. Thereby, the other end of the tire at the predetermined position is lifted, but at this time, immediately below the tire at the predetermined position and upstream of the tire rotation axis, from one end in the width direction of the conveyor to the other end in the width direction. A second roller extending from the other end in the width direction of the conveyor to one end in the width direction is provided immediately downstream of the tire rotation axis immediately below the tire at the predetermined position. A third roller extending in the conveying direction of the conveyor at a widthwise central portion of the conveyor is provided immediately below the tire at the position and upstream of the second roller. 2. It contacts the third roller at three points. Next, when the rotation means applies a rotational driving force to at least one of the first, second, and third rollers to rotate the roller, the rotation of the roller is transmitted to the tire, and the tire is rotated. The tire is rotated around the tire rotation axis. At this time, the holding means holds the tire at a predetermined position to prevent the tire from shifting. During the rotation as described above, the other end of the tire is lifted and inclined, so that the shoulder portion comes into contact with the first, second, and third rollers. Is rarely provided, so that the tire can rotate smoothly and uniformly. Claim 2
In the case of the invention described in (1), the first roller is inclined so that one end thereof is raised by the inclination means. As a result, the tire at the predetermined position is lifted at one end, but at this time, a first roller extending from one end in the width direction of the conveyor to the other end in the width direction is located upstream of the tire rotation axis.
Further, a second roller extending from the other end in the width direction of the conveyor to one end in the width direction is provided downstream of the tire rotation axis, and a third roller extending in the conveyance direction of the conveyor is provided downstream of the first roller. Since the rollers are provided, the tire contacts the first, second, and third rollers at three points. Next, in the same manner as in the first aspect of the present invention, the roller is rotated by the rotating means to rotate the tire around the rotation axis. At this time, since the tire has one end lifted and inclined, the shoulder The portion comes into contact with the first, second, and third rollers, and the tire rotates smoothly and uniformly.

[0007] According to the third aspect of the present invention, the rotation of the tire is smoother than when driven by one roller. Here, among the rollers that apply the rotational driving force to the tire, the roller farther from the tire rotation axis is the direction of action of the rotational driving force and the rotational direction (circumferential direction) of the tire, as compared with the roller closer to the tire. Is large, there is a possibility that a large slip may occur between the tire and the tire, and the rotation of the tire may become unstable. As described above, it can be prevented by rotating the roller on the far side faster than the roller on the near side. Further, according to the fifth and sixth aspects, the contact position between the second and first rollers and the tire is set to some extent from the tread end, not from the shoulder near the tread end where the end of the lateral groove exists. It can be a distant gentle shoulder. Further, according to the structure described in claim 7, the holding means can be simple in structure and inexpensive.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 11 denotes a transport conveyor that transports a pneumatic tire T that is placed horizontally (the rotation axis Z is vertical) toward the front, and the transport conveyor 11 includes a pair of side frames 12 extending in the front-rear direction. A pair of center frames 13 are provided between the side frames 12 behind the predetermined position S and extend in parallel with the side frames 12. Of the side frame 12 and the center frame 13, both ends of a plurality of rear rollers 14 extending in the width direction are rotatably supported by the center frame 13 and the side frame 12 located on one side in the width direction. The side rollers 14 are arranged at equal distances in the longitudinal direction of the conveyor 11. Pulleys 15 are attached to these rear rollers 14, respectively, and a belt 16 driven and driven by a motor (not shown) is stretched over these pulleys 15. On the other hand, a rear roller 17 similar to the rear roller 14 is also rotatably supported on the center frame 13 and the side frame 12 located on the other side in the width direction, and a pulley 18 attached to these rear rollers 14 is provided. A belt 19 that is driven by a motor and runs synchronously with the belt 16 is stretched. And when the motor operates and the belts 16 and 19 run synchronously, the rear rollers 14 and 17 rotate synchronously,
The tire T placed horizontally is transported forward. Side frame 12, center frame 13, rear roller 1 described above
4, 17, pulleys 15, 18, and belts 16, 19 as a whole constitute a rear conveyor 20.

A pair of center frames 23 is provided between the side frames 12 in front of a predetermined position S, and the center frame 23 and the side frames 12 located on one side in the width direction are provided.
Further, both ends of a plurality of front rollers 24 and 25 are rotatably supported by the center frame 23 and the side frame 12 located on the other side in the width direction, respectively. These front rollers 2
Pulleys 26 and 27 attached to 4 and 25, respectively, are driven by a motor (not shown) and run synchronously.
28 and 29 are passed over. When the motor operates and the belts 28 and 29 run synchronously, the front roller 2
The wheels 4 and 25 rotate in synchronism, and convey the horizontally placed tire T forward. The aforementioned side frame 12, center frame 23, front rollers 24, 25, pulleys 26, 27, belt
28 and 29 constitute the front conveyor 30 as a whole, and the rear conveyor 20 and the front conveyor 30 described above constitute the transport conveyor 11 as a whole. A detection sensor 31 such as a photo sensor for detecting the tire T being transported is installed on the side frame 12 immediately before the predetermined position S. When the detection sensor 31 detects the tire T, the detection sensor 31 detects the tire T, and thereafter, detects the tire T. Of the motor is stopped to stop the tire T at the predetermined position S.

1 and 2, just below the tire T at the predetermined position S, here, between the rear conveyor 20 and the front conveyor 30, from one end in the width direction of the conveyor 11 to the other end in the width direction. Although a first roller 35 extending toward the center is provided, the first roller 35 terminates at the center in the width direction of the conveyor 11, and thus has an axial length that is approximately half the width of the conveyor 11. Long. In addition, the first roller 35 is connected to the front roller after the front conveyors 20 and 30.
At the same height as 14, 17, 24, 25,
The tire T at a predetermined position S is disposed slightly upstream (rear side) from the tire rotation axis Z. 36 is the first roller
35 is a first frame that rotatably supports the 35,
The frame 36 is attached to the side frame 12 and the center frame 13.

1 and 3, a second roller 40 extending from the other end in the width direction of the conveyor 11 to one end in the width direction is provided immediately below the tire T at the predetermined position S. Since the two rollers 40 extend to one end in the width direction of the conveyor 11, the axial length thereof is substantially equal to the width of the conveyor 11. The second roller 40 is located in front of the first roller 35 and is located slightly downstream (front side) of the tire rotation axis Z of the tire T at the predetermined position S. A second frame 41 rotatably supports the second roller 40.
Is rotatably connected to a bracket 42 attached to the side frame 12 via a pin 43. A cylinder 44 extending in the up-down direction as an inclining means is installed directly below the other end of the second frame 41. The cylinder 44 is rotatably supported by the side frame 12. The tip of the piston rod 45 of the cylinder 44 is connected to the other end of the second frame 41, and as a result,
When the piston rod 45 of the cylinder 44 is retracted, the second roller 40 is rearward, and the front rollers 14, 17, 24, 25
And at the same horizontal position H as the first roller 35, but when the piston rod 45 of this cylinder 44 protrudes, the second roller 40 raises the other end around the pin 43. And swings to an inclined position K indicated by a virtual line in FIG. When the second roller 40 swings to the inclined position K and the tire T is stopped at the predetermined position S, the other side of the tire T is lifted by the second roller 40, and the tread end and the sidewall portion are removed. Between the first roller 35 and the second roller 40, and a third roller appearing on a conveyance surface described later at three points. Then, as described above, if the first roller 35 is set to approximately half the width of the conveyor 11 and the second roller 40 is set to be approximately equal in width to the conveyor 11, the first and second rollers 35, The contact position between the tire 40 and the tire T can be a gentle shoulder partly separated from the tread end, instead of the shoulder part near the tread end where the end of the lateral groove is present. It can be rotated uniformly.

1 and 4, a third roller 48 is provided immediately below the tire T at the predetermined position S and extends in the transport direction of the transport conveyor 11, that is, in the front-rear direction. At the upstream side (rear side) of 40, the central portion in the width direction of the conveyor 11;
It is located between them. 49 is the third roller 48 that rotates freely
A plurality of guide rods 50 extending in the vertical direction are fixed to the lower surface of the third frame 49. Reference numeral 51 denotes a plurality of guides attached to a support plate 52 fixed to the center frame 13, and the guide rods 50 are slidably inserted into these guides 51. 53 is a support plate 52 directly below the third frame 49
The end of a piston rod 54 of the cylinder 53 is connected to the third frame 49. As a result, when the piston rod 54 of the cylinder 53 is retracted, the third roller 48 is retracted below the upper ends of the front rollers 14, 17, 24, 25, that is, below the transport surface of the transport conveyor 11. When the piston rod 54 of the cylinder 53 projects, the third roller 48 later rises to the same height as the front rollers 14, 17, 24, 25 and appears on the transport surface of the transport conveyor 11. Immediately below the tire T at the predetermined position S, a fourth roller 56 rotatably supported by a fourth frame 55 is provided.
Is disposed on the downstream side (front side) of the second roller 40 at the center in the width direction of the transport conveyor 11, specifically between the center frames 23, and extends in the transport direction of the transport conveyor 11. The fourth roller 56 is also moved up and down by the elevating means (cylinder) in the same manner as the third roller 48. Note that the fourth roller 56 is an auxiliary member for preventing the tire T from being displaced when the tire T spins while rotating.

2 and 3, reference numeral 60 denotes a pulley attached to an output shaft of a motor 61 fixed to the first frame 36. The pulley 60 is connected to a pulley 62 attached to the first roller 35. A belt 63 is stretched between them. Reference numeral 64 denotes a pulley attached to the output shaft of a motor 65 fixed to the second frame 41, and a belt 67 is stretched between the pulley 64 and the pulley 66 attached to the second roller 40. ing. Pulleys 60, 62, 6 described above
4, 66, the motors 61 and 65, and the belts 63 and 67 as a whole are at least one of the first, second, and third rollers 35, 40, and 48, here, the first and second rollers 35, A rotating means 68 for applying a rotational driving force to the motor 40 is provided. When the tire T is being conveyed forward, the rotating means 68 follows the first and second rollers 35 and 40, and the front rollers 14, 1
Drive and rotate in the same direction as the rotation direction of 7, 24, 25,
When rotating the tire T at the predetermined position S around the tire rotation axis Z, the first and second rollers 35 and 40 are driven and rotated in opposite directions. When the rotation of the tire T at the predetermined position S is performed by the reverse rotation of the first and second rollers 35 and 40, the rotation of the tire T is reduced as compared with the case of driving by one roller. Become smooth. At this time, of the first and second rollers 35 and 40, the roller farther from the tire rotation axis Z, here, the first roller 35 is rotated at a higher speed than the roller on the closer side, here, the second roller 40. ing. This is because, of the rollers that apply the rotational driving force to the tire T, the first roller 35 on the side farther from the tire rotation axis Z has the same action direction of the rotational driving force as the second roller 40 on the closer side. Since the intersection angle with the rotation direction (circumferential direction) of the tire T is large, there is a possibility that a large slip may occur between the tire T and the rotation of the tire T and the rotation of the tire T may become unstable. If the first roller 35 on the far side is rotated at a higher speed than the second roller 40 on the near side, such a sliding amount can be added to the first roller 35 in advance, whereby the tire T This is because rotation is stabilized.

1 and 3, reference numeral 71 denotes an application roller which functions as a positioning roller provided between the third roller 48 and the second roller 40. The application roller 71 rotates (at an inclined position K). By rotating around an axis parallel to the tire rotation axis Z, for example, silicon is applied while contacting the outer surface of the bead portion of the tire T. A cylinder 72 as an insertion mechanism supported by the center frame 13 is provided below the application roller 71, and the application roller 71 is rotatably supported at the tip of a piston rod 73 of the cylinder 72. When the piston rod 73 of the cylinder 72 is retracted, the application roller 71 is located below the transport surface of the transport conveyor 11, but when the piston rod 73 of the cylinder 72 projects, it rises to a predetermined position S In the tire T, and comes into contact with the bead portion.
When the application roller 71 is inserted into the tire T and comes into contact with the bead portion as described above, the position of the tire T is regulated by the application roller 71 and is held at the predetermined position S. The above-described application roller 71 and cylinder 72 as a whole constitute a holding means 74 for holding the tire T at a predetermined position S during rotation of the tire T to prevent displacement. If the holding means 74 is composed of the application roller 71 and the cylinder 72 for moving the application roller 71 up and down, the holding means
74 can be made simple and inexpensive. 75 and 76 are first
A swing arm whose base end is swingably supported by the side frames 12 on both sides of the roller 35, these swing arms
Pressing rollers 77 and 78 are rotatably supported at the tips of 75 and 76. When the tire T is at the predetermined position S, the swing arms 75 and 76 are swinged by a swing mechanism (not shown) so that the swing arms 75 and 76 close (the leading ends thereof come close to each other), and the pressing rollers 77 and 78 are moved. It is pressed against the tire T,
At this time, the tire T is sandwiched between the pressing rollers 77 and 78 and the coating roller 71 from both sides, so that the displacement is reliably prevented. The swing arms 75 and 76, the press roller 77 described above,
Numeral 78 as a whole constitutes an auxiliary holding mechanism 79 for assisting in preventing a displacement of the tire T at the predetermined position S.

Next, the operation of the first embodiment of the present invention will be described. Now, the second roller 40 is located at the horizontal position H, the third and fourth rollers 48, 56, and the application roller 71 are located below the transport surface of the transport conveyor 11, and the swing arms 75, 76 It is assumed that the robot is swung until it is parallel to the side frame 12 and stands by the side of the conveyor 11. Next, after running the belts 16, 19, 28, and 29, after the front conveyors 20, 30, the front rollers 14, 17, 24, and 25 are synchronously rotated, and the motors 61 and 65 are operated to operate the first rollers. Then, the second rollers 35 and 40 are rotated in the same direction as the rollers. As a result, the laterally mounted tires T placed on the conveyor 11
Is transported forward (downstream side) by the transport conveyor 11, but when the tire T is transported to a predetermined position S,
The detection sensor 31 detects the tire T, temporarily stops the conveyor 11, and stops the tire T at a predetermined position S.

Next, the piston rod 54 of the cylinder 53 is protruded to move the third roller 48 behind, and the front rollers 14, 17, 24, 25
And appear on the transfer surface of the transfer conveyor 11. At the same time, the piston rod 45 of the cylinder 44
, The second roller 40 swings about the one end (the pin 43) so that the other end thereof rises from the horizontal position H, whereby the second roller 40 is inclined until the second roller 40 reaches the inclined position K. . Due to such swinging of the second roller 40, the other end of the tire K at the predetermined position S is lifted. At this time, the tire K is transported immediately below the tire T at the predetermined position S and upstream of the tire rotation axis Z. A first roller 35 extending from one end in the width direction of the conveyor 11 to a center in the width direction,
Immediately below the tire T at the predetermined position S and downstream of the tire rotation axis Z, a second roller 40 extending from the other end in the width direction to one end in the width direction of the conveyor 11 is further provided. The second roller 40 just below T
On the further upstream side, the third roller 48 extending in the transport direction of the transport conveyor 11 is provided at the central portion in the width direction of the transport conveyor 11, so that the tire T is mounted on the first, second, and third rollers 35. , 40, 48 at three points. At this time, the fourth roller 56 is also raised to a position very close to the tire T.

Next, the application rod 71 is inserted into the tire T at the predetermined position S by projecting the piston rod 73 of the cylinder 72, and is brought into contact with the bead portion of the tire T. At this time, the swing arms 75 and 76 are swung in the horizontal plane in the closing direction by the swing mechanism, and the pressing rollers 77 and 78 are pressed against the outer surfaces of the tire T on both sides of the application roller 71. Next, the motors 61 and 65 are operated to drive and rotate the first and second rollers 35 and 40 in opposite directions. As a result, the first and second rollers 35 and 40 rotating under the driving force and the third roller 48 rotating freely are provided with three
The tire T contacting at a point is the first and second rollers 3
Tire rotation axis Z by the rotation driving force transmitted from 5, 40
At this time, for example, silicon is applied on the outer surface of the bead portion of the tire T by a rotating application roller 71 in a circumferential direction. During this rotation, the tire T is sandwiched between the pressing rollers 77 and 78 and the application roller 71 from both sides as described above, so that the positional deviation is regulated and the tire T is securely held at the predetermined position S. Also, at the time of rotation as described above, the other end of the tire T is lifted and inclined, so that the shoulder portion of the tire T contacts the first, second, and third rollers 35, 40, and 48 at three points. However, since a letter or the like is scarcely provided on such a shoulder portion, the tire T can rotate smoothly and uniformly.

When silicon is applied to the bead portion of the tire T over the entire circumference in this way, the piston rods 45, 73 of the cylinders 44, 72 are retracted to move the second roller 40 from the inclined position K to the horizontal position H. And the application roller
71 is lowered below the transfer surface of the transfer conveyor 11.
At the same time, the third and fourth rollers 48 and 56 are also transported on the conveyor.
While lowering below the transfer surface of 11, the swing arms 75 and 76 are swung in the opening direction to return to the initial position.
Then, afterward, the front rollers 14, 17, 24, 25 and the first and second rollers 35, 40 are rotated in the same direction as described above, and the tire T
Is transported forward.

FIG. 5 is a view showing a second embodiment of the present invention. In this embodiment, a first roller 81 extending from one end in the width direction to the other end in the width direction of the conveyor 11 immediately below the tire T at the predetermined position S and upstream of the tire rotation axis Z, A transport conveyor immediately below the tire T at a predetermined position S and downstream from the tire rotation axis Z.
The second roller 82 extending from the other end in the width direction to the center in the width direction of the transport conveyor 11 is further provided immediately below the tire T at the predetermined position S and downstream of the first roller 81. , A third roller 83 extending in the transport direction of the transport conveyor 11 is provided. Further, a fourth roller 84 is provided immediately below the tire T at the predetermined position S and upstream of the first roller 81 at a central portion in the width direction of the conveyor 11 in the conveying direction of the conveyor 11. The other configuration is the same as that of the first embodiment. In the case of this embodiment, the first roller 81 is connected to the cylinder
Incline so that one end is raised by 44,
Lift one end of the tire T at the predetermined position S,
At this time, as described above, the first roller 81 extending from one end in the width direction to the other end in the width direction of the conveyor 11 is provided on the upstream side of the tire rotation axis Z, and on the downstream side of the tire rotation axis Z. A second roller 82 extending from the other end in the width direction of the conveyor 11 to the center in the width direction, further comprising a first roller 81
Further downstream, a third extending in the transport direction of the transport conveyor 11
Since the rollers 83 are provided, the tire T also comes into contact with the first, second, and third rollers 81, 82, and 83 at three points as described above. Next, the first and second rollers 81, 82
Is rotated in the opposite direction as described above to rotate the tire T around the tire rotation axis Z. At this time, since the tire T has one end lifted and inclined, the shoulder portions are first, second, and third. The tire T comes into contact with the third rollers 81, 82, and 83, and the tire T rotates smoothly and uniformly. The other operations are the same as in the first embodiment.

In the first embodiment, the length of the first roller 35 in the axial direction is set to approximately one-half of the width of the conveyor 11.
In the second embodiment, the axial length of the second roller 40 is substantially equal to the width of the conveyor 11, and in the second embodiment, the axial length of the first roller 81 is substantially equal to the width of the conveyor 11. , The axial length of the second roller 82 is set to approximately half the width of the conveyor 11.
However, in the present invention, the axial lengths of the first and second rollers may be set to appropriate lengths. At this time, the second roller 40 and the first roller 81 may be oscillated about the center in the width direction of the conveyor 11. Further, in the above-described embodiment, the tire T is rotated around the tire rotation axis Z by applying a rotational driving force in the opposite direction to the first and second rollers 35, 40, 81, and 82. In the present invention, the first, second and third rollers 3
The tire T may be rotated by applying a rotational driving force to at least one of the rollers 5, 40, 48 or 81, 82, 83. Furthermore, in the above-described embodiment, the tire T is held at the predetermined position S by using the application roller 71 inserted into the tire T (the pressing rollers 77 and 78 are used as auxiliary). In the present invention, the tire T may be held at the predetermined position S by using three or more pressing rollers that contact the tread portion of the tire T from outside. In the above-described embodiment, in order to apply silicon to the bead portion of the tire T,
Although the tire T is rotated, in the present invention, the tire T is rotated in order to read a bar code provided on the tire T, or to attach a mark to the tire T or perform an inspection. You may do so.

[0021]

As described above, according to the present invention, a horizontally placed tire can be smoothly and uniformly rotated.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II in FIG. 1;

FIG. 3 is a sectional view taken along the line II-II in FIG.

FIG. 4 is a partially cutaway view taken along the line III-III of FIG. 1;

FIG. 5 is a schematic plan view showing a second embodiment of the present invention.

[Explanation of symbols]

 11 ... Conveyer 35 ... First roller 40 ... Second roller 44 ... Inclination means 48 ... Third roller 53 ... Elevating means 68 ... Rotating means 71 ... Positioning roller 72 ... Insertion mechanism 74 ... Holding means S ... Predetermined position T ... Tire Z: Tire rotation axis

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akihiko Nakazawa 3-1-1 Ogawa Higashicho, Kodaira City, Tokyo Inside Bridgestone Technology Center Co., Ltd.

Claims (7)

[Claims] 1. A tire rotating device for rotating a tire placed around a rotation axis when a horizontally placed tire is conveyed to a predetermined position by a conveyance conveyor, wherein the tire is located just below the tire at the predetermined position from a tire rotation axis. A first roller provided on the upstream side and extending from one end in the width direction of the conveyor to the other end in the width direction, and a first roller provided immediately below the tire at the predetermined position and downstream from the tire rotation axis, and provided in the width direction of the conveyor. A second roller extending from the other end toward one end in the width direction, and a second roller provided immediately below the tire at the predetermined position and upstream of the second roller, and extending in the transport direction of the transport conveyor at a widthwise central portion of the transport conveyor. Third
A roller, elevating means for elevating and lowering the third roller so that the third roller protrudes and retracts on the transport surface of the transport conveyor,
An inclining means for inclining the tire at a predetermined position with the first roller, the second roller, and the third roller appearing on the conveying surface by inclining the second roller so that the other end thereof rises; When the tire is in contact with the second and third rollers, the tire is rotated around a rotation axis by applying a rotational driving force to at least one of the first, second, and third rollers. A tire rotating device comprising: a rotating unit; and a holding unit that holds the tire at a predetermined position during rotation of the tire to prevent displacement. 2. A tire rotation device for rotating a tire placed around a rotation axis when a horizontally placed tire is conveyed to a predetermined position by a conveyance conveyor, the tire rotation device being located immediately below the tire at the predetermined position and having a tire rotation axis. A first roller provided on the upstream side and extending from one end in the width direction of the conveyor to the other end in the width direction, and a first roller provided immediately below the tire at the predetermined position and downstream from the tire rotation axis, and provided in the width direction of the conveyor. A second roller extending from the other end toward one end in the width direction, and a second roller provided immediately below the tire at the predetermined position and downstream of the first roller, and extending in a widthwise central portion of the transport conveyor in the transport direction of the transport conveyor. Third
A roller, elevating means for elevating and lowering the third roller so that the third roller protrudes and retracts on the transport surface of the transport conveyor,
An inclining means for inclining the tire at a predetermined position to contact the first roller, the second roller, and the third roller appearing on the conveying surface by inclining the first roller so that one end thereof rises; 2. When the tire is in contact with the third roller, a rotation driving force is applied to at least one of the first, second, and third rollers to rotate the tire around the rotation axis. And a holding means for holding the tire at a predetermined position during rotation of the tire to prevent displacement. 3. The tire rotating device according to claim 1, wherein the tire is rotated by driving and rotating the first and second rollers in opposite directions by driving means. 4. The tire rotation device according to claim 3, wherein a roller farther from the tire rotation axis of the first and second rollers is rotated at a higher speed than a roller closer to the rotation axis. 5. The method according to claim 5, wherein the first roller is set to approximately one-half of the width of the conveyor.
2. The tire rotating device according to claim 1, wherein the length of the second roller is substantially equal to the width of the conveyor. 6. The tire rotating device according to claim 2, wherein the first roller has a length substantially equal to the width of the conveyor, and the second roller has a length approximately half the width of the conveyor. 7. A positioning roller for rotating the holding means around an axis parallel to the tire rotation axis during rotation, and raising and lowering the positioning roller along the tire rotation axis so that the positioning roller is located inside the tire. 2. An insertion mechanism which is inserted into the bead and comes into contact with the bead portion.
Or the tire rotation device according to 2.