JP2024019762A - Hook for tire - Google Patents

Abstract

To provide a hook for tires capable of holding a green tire while suppressing deformation by self-weight.SOLUTION: A hook 10 for tires includes: a holding part 11 including a first holding part 20 for hooking a chafer CF of a green tire RC in a posture where its axial direction is substantially horizontal, for holding the green tire RC, and for holding a first position CF1, positioned on the upper most part of the chafer CF, a second holding part 30 for holding a second position CF2 separated from the first position CF1 of the chafer CF by a predetermined distance L in a first circumferential direction, and a third holding part 40 for holding a third position CF3 separated from the first position CF1 of the chafer CF by the predetermined distance L in a second circumferential direction opposite from the first circumferential direction; and a hook body 12 for supporting the holding part 11.SELECTED DRAWING: Figure 4

Description

The present invention relates to a tire hook used when a green tire is transported by a transport device such as a trolley conveyor.

As a conventional tire hook, there is one disclosed in Patent Document 1. The tire hook disclosed in Patent Document 1 is applied to hooking a tire mounted on a vehicle and lifting the vehicle. This conventional tire hook is not applicable to transporting tires and green tires in the pneumatic tire manufacturing process. Conventionally, when transporting green tires in a tire manufacturing process, a transport device such as a trolley conveyor is generally used. The conveyance device has a hook for hanging a raw tire (low cover).

FIG. 6A is a schematic front view showing a conventional tire hook. FIG. 6B is a schematic side view showing a conventional tire hook. FIGS. 6A and 6B show a tire hook 100, which is an example of a hook conventionally used for conveying green tires. The tire hook 100 includes a first portion 101 for hooking a green tire, and a second portion 102 for connecting the first portion 101 to a conveyance device (not shown) such as a trolley conveyor. The first portion 101 extends substantially in the front-back direction, and the second portion 102 extends substantially in the vertical direction. The conveying device hooks the green tire onto the first portion 101 of the tire hook 100, and conveys the green tire while holding the green tire in a position where the axial direction is substantially horizontal (the front-rear direction shown in FIG. 6B).

JP2009-102112A

FIG. 7 is a schematic diagram showing how a green tire is held by a conventional tire hook. As shown in FIG. 7, when the raw tire RC is held by being hooked with the tire hook 100, the raw tire RC is suspended at one point and deforms due to its own weight. In recent years, there has been an increasing demand for improved uniformity in pneumatic tires, but it has been found that having a history of such deformation in the raw tire stage affects the quality (uniformity) of pneumatic tires. . Therefore, there is a need for the development of a hook that can hold a green tire while suppressing deformation due to its own weight.

An object of the present invention is to provide a tire hook that can hold a green tire while suppressing deformation due to its own weight.

(1) The tire hook according to the present invention is a tire hook that holds the raw tire by hooking the inner diameter part of the raw tire in a position where the axial direction is approximately horizontal, and the tire hook holds the raw tire by hooking the inner diameter part of the raw tire in a position where the axial direction is approximately horizontal. a first holding part that holds the first portion at the position; a second holding part that holds the second position spaced apart from the top of the inner diameter part by a predetermined distance in the first circumferential direction; and the top part of the inner diameter part. a third holding part that holds the third position spaced from the top by the predetermined distance in a second circumferential direction opposite to the first circumferential direction; a hook body that supports the holding part; , is provided.

According to the tire hook having the above configuration, the green tire can be held at three or more points by the first holding part, the second holding part, and the third holding part, and the green tire can be held while suppressing deformation due to its own weight. can do.

(2) In the tire hook according to the aspect (1) of the present invention, the first holding portion includes a first contact portion capable of contacting the green tire, and a first contact portion that places the green tire on the first contact portion. a first displacement that supports the first contact portion so as to be displaceable between a first operating position when the green tire is placed on the first contact portion and a first standby position when the raw tire is not placed on the first contact portion; The second holding part includes a second contact part capable of contacting the green tire, and a second holding part that is arranged between a second operating position in contact with the green tire and a second standby position in which it does not contact the tire. The third holding part includes a second displacement mechanism that displaceably supports the second contact part, and the third holding part has a third contact part that can come into contact with the green tire, and a third operating position that contacts the tire and a second displacement mechanism that displaceably supports the second contact part. It is preferable to include a third displacement mechanism that supports the third contact portion so that it can be displaced between a third standby position where it does not contact the tire.
According to the tire hook configured as described above, the positions of the second contact portion and the third contact portion can be adjusted according to the size of the green tire. Thereby, green tires of different sizes can be held while suppressing deformation.

(3) The tire hook according to the aspect (2) of the present invention further includes a conversion mechanism that converts the displacement of the first contact part into the displacement of the second contact part and the third contact part, When the first contact part is displaced from the first standby position to the first operating position, the conversion mechanism displaces the second contact part from the second waiting position to the second operating position, and Preferably, the third contact portion is displaced from the third standby position to the third operating position.
According to the tire hook configured as described above, the second contact portion and the third contact portion can be displaced to each operating position by utilizing the weight of the raw tire. In this case, there is no need for the user to adjust the arrangement of the second contact portion and the third contact portion depending on the size of the green tire.

(4) The tire hook according to the aspect (3) of the present invention is configured to bias the second contact portion toward the second standby position and bias the third contact portion toward the third standby position. It is preferable to further include a force section.
According to the tire hook configured as described above, when the green tire placed on the first contact portion is removed, the second contact portion and the third contact portion can be displaced to their respective standby positions. The tire hook having such a configuration does not require a power supply to displace each contact portion, and can be easily applied to existing and new tire manufacturing processes.

(5) In the tire hook according to any one of the aspects (1) to (4) of the present invention, the holding portion includes a one-side holding portion located on one side in the axial direction of the green tire; a second side holding part located on the other side in the axial direction of the green tire, the one side holding part holds the inner diameter part on one side in the axial direction of the green tire, and the other side holding part holds the inner diameter part on one side in the axial direction of the green tire; It is preferable to hold the inner diameter portion on the other side in the axial direction of the raw tire.
According to the tire hook having the above configuration, the weight of the green tire can be dispersed and held in two holding parts in the axial direction of the green tire, and deformation of the green tire due to the weight can be further suppressed.

According to the present invention, a green tire can be held while suppressing deformation due to its own weight.

FIG. 1 is a schematic perspective view showing a tire hook according to an embodiment of the present invention. FIG. 1 is a schematic front view showing a tire hook according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic partial cross-sectional side view showing a tire hook according to an embodiment of the present invention. FIG. 1 is a schematic front view showing a state in which a green tire is held by a tire hook according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the use condition of the tire hook based on one Embodiment of this invention. FIG. 2 is a schematic front view showing a conventional tire hook. FIG. 2 is a schematic side view showing a conventional tire hook. FIG. 2 is a schematic diagram showing a state in which a green tire is held by a conventional tire hook.

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be described in detail based on preferred embodiments, with appropriate reference to the drawings.

[Overall configuration of tire hook]
FIG. 1 is a schematic perspective view showing a tire hook according to an embodiment of the present invention. FIG. 2 is a schematic front view showing a tire hook according to an embodiment of the present invention. FIG. 3 is a schematic partial cross-sectional side view showing a tire hook according to an embodiment of the present invention. FIG. 4 is a schematic front view showing a state in which a green tire is held by a tire hook according to an embodiment of the present invention. A tire hook 10 shown in FIGS. 1 to 3 is an embodiment of a tire hook according to the present invention. The tire hook 10 shown in FIGS. 1 to 3 is applied, for example, to a trolley conveyor (not shown) disposed along the pneumatic tire manufacturing process. The tire hook 10 is provided in a suspended state from an endless conveyor (for example, a wire) of the trolley conveyor. A plurality of tire hooks 10 are arranged at predetermined intervals along the circumferential direction of the carrier.

As shown in FIG. 4, the raw tire RC to be held by the tire hook 10 has an annular shape when viewed in the axial direction. In the following description, the inner diameter portion of the raw tire RC is also referred to as chafer CF. The chafer CF is a part that covers the bead core built into the inner diameter part of the raw tire RC, and is a reinforcing layer that protects the carcass inside the tire from friction with the rim. The tire hook 10 hooks the chafer CF and holds the raw tire RC.

As shown in FIGS. 1 to 4, the tire hook 10 includes a holding portion 11 and a hook body 12. As shown in FIGS. The holding part 11 is a part that contacts and holds the raw tire RC. The hook body 12 is a part that connects a trolley conveyor (not shown) and the holding part 11, and is fixed to the trolley conveyor at one end (upper end) and has a holding part at the other end (lower end). 11 is fixed. The hook body 12 has a first portion 12a that is suspended from the trolley conveyor and faces substantially horizontally, and a second portion 12b that connects the first portion 12a to the trolley conveyor and faces substantially vertically. In this description, the direction in which the first portion 12a extends is referred to as the front-back direction, and the direction in which the second portion 12b extends is referred to as the up-down direction. In this description, the direction orthogonal to the front-rear direction and the up-down direction is referred to as the left-right direction. In this description, the direction of the central axis of the raw tire RC is also referred to as the axial direction. When the raw tire RC is held by the tire hook 10, the axial direction of the raw tire RC is approximately parallel to the longitudinal direction.

As shown in FIG. 2, the tire hook 10 of the present invention includes a plurality (two) of holding portions 11 in the front-rear direction (axial direction). In the following description, the holding part 11 on the front side (one side) in the front-rear direction is also referred to as the front holding part 11A, and the holding part 11 on the rear side (the other side) is also referred to as the rear holding part 11B. In addition, in the following description, when it is simply referred to as "holding part 11", it is description about the structure common to 11 A of front side holding parts, and the back side holding part 11B. In the tire hook 10 of the present invention, the front holding part 11A and the rear holding part 11B are arranged side by side in the front-back direction. In the tire hook 10 of the present invention, the front holding part 11A and the rear holding part 11B have the same structure. In the tire hook 10 of the present invention, the rear holding part 11B has a form obtained by rotating the front holding part 11A by 180 degrees about an axis extending in the vertical direction. Therefore, the following description will mainly describe the structure of the front holding part 11A, and will omit detailed description of the rear holding part 11B.

(holding part)
As shown in FIGS. 1 to 4, the holding section 11 (front holding section 11A and rear holding section 11B) includes a support block 15, a fixing section 16, a first holding section 20, a second holding section 30, and a third holding section 11A and a rear holding section 11B. A holding part 40 is provided.

The support block 15 is a member that connects the first holding part 20, the second holding part 30, and the third holding part 40. The fixing part 16 is a part that fixes the support block 15 to the hook body 12. The fixed part 16 is composed of a stay member 16a fixed to the support block 15, a bar member 16b, a bolt 16c, and a nut 16d. The support block 15 is fixed to the first portion 12a by fastening bolts 16c and nuts 16d with the stay member 16a and the bar member 16b arranged to sandwich the first portion 12a.

The first holding section 20 includes a first contact section 21 and a first displacement mechanism 22 . The first contact portion 21 is a portion on which the raw tire RC is placed and comes into contact with the raw tire RC. The first contact portion 21 is constituted by a plate-shaped member curved around an axis parallel to the front-rear direction. The first contact portion 21 having such a shape easily follows the arcuate chafer CF.

The first contact portion 21 is pressed downward by the weight of the raw tire RC when the raw tire RC is placed thereon. As shown in FIG. 4, the first contact portion 21 contacts a first position CF1 located at the top of the chafer CF in the raw tire RC. The first position CF1 is a portion located at the uppermost side in the vertical direction in the chafer CF of the green tire RC with the axial direction directed substantially horizontally.

The first displacement mechanism 22 is a mechanism that supports the first contact portion 21 so that it can be displaced in the vertical direction. The first displacement mechanism 22 includes a first guide member 23, a first slide member 24, and a first arm member 25. The first guide member 23 is formed of a cylindrical or columnar member, and extends from the support block 15 in the vertical direction. The first slide member 24 has a shaft hole, into which the first guide member 23 is inserted. The first slide member 24 is configured to be slidable in the vertical direction along the first guide member 23. The first arm member 25 has a lower end fixed to the first slide member 24, and is displaced in the vertical direction as the first slide member 24 is displaced. The first arm member 25 is provided with a first contact portion 21 at its upper end. Therefore, the first contact portion 21 is displaced in the vertical direction as the first slide member 24 is displaced. In addition, in the following explanation, the position of the first contact part 21 when it is displaced most upwardly is referred to as the first standby position X1, and the position of the first contact part 21 when it is displaced most downwardly is referred to as a first standby position X1. is referred to as the first operating position Y1. In this embodiment, the first contact part 21 is fixed to the first arm member 25, but a shaft parallel to the front-rear direction is provided at the upper end of the first arm member 25, and the first contact part 21 is fixed to the first arm member 25 by the shaft. 21 may be rotatably supported.

The second holding section 30 includes a second contact section 31 and a second displacement mechanism 32. The second contact portion 31 is a portion of the raw tire RC that contacts the chafer CF. The second contact portion 31 is constituted by a plate-shaped member curved around an axis parallel to the front-rear direction. The second contact portion 31 having such a shape tends to follow the arcuate chafer CF. In the following description, the position where the second contact portion 31 of the chafer CF contacts is referred to as a second position CF2. In other words, the second contact portion 31 contacts the chafer CF at the second position CF2. The second position CF2 is a position where the circumferential phase (angle) of the chafer CF is shifted from the first position CF1 by a predetermined angle θ in the first circumferential direction (counterclockwise in FIG. 4). In the following description, the circumference of the chafer CF between the first position CF1 and the second position CF2 is also referred to as a predetermined distance L. Note that the predetermined angle θ and the predetermined distance L are determined by the size of the raw tire RC.

The second displacement mechanism 32 is a mechanism that supports the second contact portion 31 so that it can be displaced in the left-right direction. The second displacement mechanism 32 includes a second guide member 33, a second slide member 34, and a second arm member 35. The second guide member 33 is constituted by a cylindrical or columnar member, and extends from the support block 15 to the first side (left side) orthogonal to the axial direction and the up-down direction. The second slide member 34 has a shaft hole, into which the second guide member 33 is inserted. The second slide member 34 is configured to be slidable along the second guide member 33. The second arm member 35 has one end fixed to the second slide member 34, and is displaced in the left-right direction as the second slide member 34 is displaced. The second arm member 35 is provided with a second contact portion 31 at the other end. Therefore, the second contact portion 31 is displaced in the left-right direction as the second slide member 34 is displaced. In the following description, the position of the second contact portion 31 when the second slide member 34 is closest to the support block 15 will be referred to as a second standby position The position of the second contact portion 31 at this time is referred to as a second operating position Y2. In this embodiment, the second contact part 31 is fixed to the second arm member 35, but a shaft parallel to the front-rear direction is provided at the left end of the second arm member 35, and the second contact part 31 is fixed to the second arm member 35 by the shaft. 31 may be rotatably supported.

The third holding section 40 includes a third contact section 41 and a third displacement mechanism 42 . The third contact portion 41 is a portion that contacts the inner diameter portion of the raw tire RC. The third contact portion 41 is constituted by a plate-shaped member curved around an axis parallel to the front-rear direction. The third contact portion 41 having such a shape tends to follow the arcuate chafer CF. In the following description, the position where the third contact portion 41 of the chafer CF contacts is referred to as a third position CF3. In other words, the third contact portion 41 contacts the chafer CF at the third position CF3. The third position CF3 is a predetermined angle θ, which is the same as that of the second contact portion 31, from the first position CF1 in the second circumferential direction (clockwise in FIG. 4) with respect to the circumferential phase (angle) of the chafer CF. It is a position with a phase shift of . At this time, the circumference of the chafer CF between the first position CF1 and the third position CF3 is the same predetermined distance L as the circumference of the chafer CF between the first position CF1 and the second position CF2. .

The third displacement mechanism 42 is a mechanism that supports the third contact portion 41 in a movable manner. The third displacement mechanism 42 includes a third guide member 43, a third slide member 44, and a third arm member 45. The third guide member 43 is formed of a cylindrical or columnar member, and extends from the support block 15 to the second side (right side) perpendicular to the axial direction and the up-down direction. The third slide member 44 has a shaft hole, into which the third guide member 43 is inserted. The third slide member 44 is configured to be slidable along the third guide member 43. The third arm member 45 has one end fixed to the third slide member 44, and is displaced in the left-right direction as the third slide member 44 is displaced. The third arm member 45 is provided with a third contact portion 41 at the other end. Therefore, the third contact portion 41 is displaced in the left-right direction as the third slide member 44 is displaced. In the following description, the position of the third contact portion 41 when the third slide member 44 is closest to the support block 15 will be referred to as a third standby position The position of the third contact portion 41 at this time is referred to as a third operating position Y3. In this embodiment, the third contact part 41 is fixed to the third arm member 45, but a shaft parallel to the front-rear direction is provided at the right end of the third arm member 45, and the third contact part 41 is fixed to the third arm member 45 by the shaft. 41 may be rotatably supported.

According to the tire hook 10 having such a configuration, the positions of the second contact portion 31 and the third contact portion 41 are adjusted by the second displacement mechanism 32 and the third displacement mechanism 42 according to the size of the green tire RC. It becomes possible to do so. This makes it possible to hold raw tires RC of different sizes using one tire hook 10.

According to the tire hook 10 having such a configuration, the first contact portion 21 (first position CF1), the second contact portion 31 (second position CF2), and the third contact portion 41 (third position CF3) are Since the raw tire RC can be held at three points, deformation of the raw tire RC due to its own weight can be suppressed.

(link mechanism)
As shown in FIGS. 1 to 4, the tire hook 10 further includes a link mechanism (conversion mechanism) 50. The link mechanism 50 includes a first link member 51 and a second link member 52. The first link member 51 and the second link member 52 have a substantially rectangular shape and are made of steel plates. The link mechanism 50 includes pins 26 and 27 provided on the first arm member 25 of the first holding section 20 , a pin 36 provided on the second arm member 35 of the second holding section 30 , and a pin 36 provided on the second arm member 35 of the second holding section 30 . A pin 46 provided on a three-arm member 45 is included. The pins 26, 27, 36, and 46 all face in the front-rear direction and are parallel to each other. The link mechanism 50 is configured by pin-connecting the first link member 51 to the pins 26 and 36, and by pin-connecting the second link member 52 to the pins 27 and 46.

When the pins 26 and 27 (first arm member 25) are displaced in the vertical direction, the holding part 11 displaces the pin 36 in the left-right direction via the first link member 51, and also displaces the pin 36 in the left-right direction via the second link member 52. The pin 46 is displaced in the left and right direction. In the holding portion 11 , the vertical displacement of the first arm member 25 is converted by the link mechanism 50 into horizontal displacement of the left and right arm members 35 and 45 . As a result, in the holding part 11, as the first contact part 21 is displaced in the vertical direction, the second contact part 31 and the third contact part 41 are displaced in the left-right direction.

In the tire hook 10 having such a configuration, as shown in FIG. 4, when a green tire RC is placed on the first contact portion 21, the first contact portion 21 is displaced downward due to the weight of the green tire RC. The second contact portion 31 and the third contact portion 41 can be displaced using the following. In this case, there is no need for the user to adjust the arrangement of the second contact portion 31 and the third contact portion 41 according to the size of the raw tire RC.

Note that the tire hook 10 of the present invention includes a link mechanism 50 as a conversion mechanism that converts the displacement of the first arm member 25 into the displacement of each arm member 35, 45, but the present invention The conversion mechanism in the tire hook is not limited to a link mechanism, but may be a cam mechanism, for example.

(Spring)
As shown in FIGS. 1 to 4, the tire hook 10 further includes a spring (biasing portion) 60. In the tire hook 10 of the present invention, the spring 60 is provided in the second holding part 30 and the third holding part 40.

In the second holding section 30 , the spring 60 is arranged between the second guide member 33 and the second slide member 34 . The spring 60 has a constant length when the second contact portion 31 is located at the second standby position X2, and is shortest when the second contact portion 31 is located at the second operating position Y2. Ru. Therefore, when the second contact portion 31 is located at the second standby position When the second sliding member 34 is displaced from the position X2 toward the second operating position Y2, a spring force is generated to be applied to the second sliding member 34, and when the second contact portion 31 is located at the second operating position Y2, the second sliding member 34 is moved toward the second operating position Y2. The spring force applied to the slide member 34 becomes maximum.

In the third holding section 40 , the spring 60 is arranged between the third guide member 43 and the third slide member 44 . The spring 60 has a constant length when the third contact portion 41 is located at the third standby position X3, and is shortest when the third contact portion 41 is located at the third operating position Y3. Ru. Therefore, when the third contact portion 41 is located at the third standby position When the third slide member 44 is displaced from the position The spring force applied to the slide member 44 becomes maximum.

In the tire hook 10, the left and right springs 60 bias the left and right slide members 34, 44 toward the respective standby positions X2, X3, so that the first It becomes possible to reciprocate the contact portion 21, the second contact portion 31, and the third contact portion 41. In addition, in the tire hook 10 of this embodiment, the second holding part 30 and the third holding part 40 are each provided with a spring 60, but the first holding part 20 may be provided with the spring 60. In this case, it is preferable that the spring 60 is disposed between the first guide member 23 and the first slide member 24, and the spring 60 biases the first contact portion 21 toward the first standby position X1.

(About usage status of tire hook)
FIG. 5 is a schematic diagram showing how the tire hook according to an embodiment of the present invention is used. As shown in the upper diagram in FIG. The part 31 is located at the second standby position X2, and the third contact part 41 is located at the third standby position X3.

As shown in the lower diagram of FIG. 5, when a raw tire RC is placed on the first contact portion 21, the tire hook 10 has the first slide member 24 and the first arm member 25 pushed down by the weight of the raw tire RC. At the same time, the first contact portion 21 is displaced from the first standby position X1 to the first actuation position Y1, and as a result, the second contact portion 31 is displaced from the second standby position The portion 41 is displaced from the third standby position X3 to the third operating position Y3.

In the tire hook 10, when the raw tire RC is removed from the first contact part 21, the second contact part 31 is moved from the second operating position Y2 to the second standby position X2 by the spring force (biasing force) of the spring 60. At the same time, the third contact portion 41 is also displaced from the third operating position Y3 to the third standby position X3. At this time, the spring force (biasing force) of the spring 60 also acts on the first slide member 24 and the first arm member 25, and the first arm member 25 is displaced upward. As a result, the first contact portion 21 It is displaced from the first operating position Y1 to the first standby position X1. At this time, the tire hook 10 takes the form shown in the upper diagram of FIG. 5 again.

According to the tire hook 10 having such a configuration, when a raw tire RC is placed on the first contact portion 21, the second contact portion 31 and the third contact portion 41 are automatically moved to the respective operating positions Y2, When the raw tire RC is removed from the first contact portion 21, the second contact portion 31 and the third contact portion 41 are automatically displaced to the respective standby positions X2 and X3. be able to. The tire hook 10 having such a configuration does not require a power source to displace the second contact portion 31 and the third contact portion 41, so it can be easily applied to existing and newly installed trolley conveyors. .

(About the shape of raw tires)
As shown in FIG. 4, the tire hook 10 of the present invention is configured to hold a green tire RC at three points. More specifically, the tire hook 10 of the present invention has a front holding part 11A disposed on the front side and a rear holding part 11B disposed on the rear side in the front-rear direction (see FIG. 3). In order to hold the chafer CF located at 3 points and the chafer CF located at the rear side at 3 points, the raw tire RC is held at 6 points in total. In this description, such a mode of holding six points in total is also referred to as three-point holding. Note that the tire hook 10 of this embodiment includes a plurality (two) of holding parts 11 (front holding part 11A and rear holding part 11B) in the front-rear direction, but there is only one holding part 11. You can. In this case, it is preferable that one first contact part 21, one second contact part 31, and one third contact part 41 each have a length spanning each of the front and rear chafers CF.

The green tire RC held by the tire hook 10 of the present invention has its own weight due to the second contact portion 31 being in contact with the second position CF2 and the third contact portion 41 being in contact with the third position CF3. The vertical elongation caused by this is suppressed. The tire hook 10 of the present invention suppresses deformation (vertical elongation) at the stage of raw tire RC, so that the deformation history of raw tire RC affects the quality (especially uniformity) of the final product (pneumatic tire). It is possible to suppress the influence of

In addition, in the tire hook 10 of the present invention, when the green tire RC is placed on the first contact part 21, the second contact part 31 actively presses the second position CF2 to the left (first direction), In addition, the third contact portion 41 may actively press the third position CF3 to the right (second direction).

In the tire hook 10 of the present invention, the second position CF2 and the third position CF3 where the second holding part 30 and the third holding part 40 contact the chafer CF are located in the upper half of the chafer CF. ing. According to such a configuration, the tire hook 10 can be configured compactly. In addition, in the tire hook 10 of the present invention, the second position CF2 and the third position CF3 may be located in the vertical center of the chafer CF or in the lower half of the chafer CF.

[Operations and effects of each embodiment]
(1) The tire hook 10 of the present embodiment hooks the chafer CF of a raw tire RC in a position where the axial direction is substantially horizontal, and holds the raw tire RC. The tire hook 10 is spaced from a first holding part 20 that holds a first position CF1 located at the top of the chafer CF by a predetermined distance L in a first circumferential direction from the first position CF1 of the chafer CF. A second holding part 30 that holds a second position CF2 and a third position CF3 that is spaced a predetermined distance L from the first position CF1 of the chafer CF in a second circumferential direction opposite to the first circumferential direction. The hook body 12 includes a holding part 11 including a third holding part 40, and a hook body 12 supporting the holding part 11.
According to the tire hook 10 having the above configuration, the green tire RC can be held at three or more points by the first holding part 20, the second holding part 30, and the third holding part 40, thereby preventing deformation due to its own weight. It can be held while suppressing it.

(2) In the tire hook 10 of the present embodiment, the first holding part 20 has a first contact part 21 that contacts the raw tire RC, and a first contact part 21 that contacts the raw tire RC, and a first contact part 21 that contacts the raw tire RC, and a The first displacement mechanism 22 supports the first contact part 21 so as to be movable between the first operating position Y1 and the first standby position X1 when no green tire is placed on the first contact part 21. The second holding part 30 includes a second contact part 31 that can contact the raw tire RC, and a second operating position Y2 that contacts the raw tire RC and a second standby position X2 that does not contact the raw tire RC. A second displacement mechanism 32 that displaceably supports the second contact portion 31 is provided. The third holding part 40 includes a third contact part 41 that can contact the raw tire RC, and a third operating position Y3 that contacts the raw tire RC and a third standby position X3 that does not contact the raw tire RC. A third displacement mechanism 42 that displaceably supports the third contact portion 41 is provided.
According to the tire hook 10 configured as described above, the positions of the second contact portion 31 and the third contact portion 41 can be adjusted according to the size of the green tire RC. Thereby, raw tires RC of different sizes can be held while suppressing deformation.

(3) The tire hook 10 of the present embodiment further includes a link mechanism 50 that converts displacement of the first contact portion 21 into displacement of the second contact portion 31 and the third contact portion 41. The link mechanism 50 displaces the second contact portion 31 from the second standby position X2 to the second actuation position Y2 when the first contact portion 21 is displaced from the first standby position X1 to the first actuation position Y1, and The third contact portion 41 is displaced from the third standby position X3 to the third operating position Y3.
According to the tire hook 10 configured as described above, the second contact portion 31 and the third contact portion 41 can be displaced to the respective operating positions Y2 and Y3 using the weight of the raw tire RC. In this case, there is no need for the user to adjust the arrangement of the second contact portion 31 and the third contact portion 41 according to the size of the raw tire RC.

(4) The tire hook 10 of the present embodiment further includes a spring 60 that biases the second contact portion 31 toward the second standby position X2 and biases the third contact portion 41 toward the third standby position X3.
According to the tire hook 10 configured as described above, when the raw tire RC is removed from the first contact portion 21, the second contact portion 31 and the third contact portion 41 can be displaced to the respective standby positions X2 and X3. can. The tire hook 10 having such a configuration does not require power supply to displace the second contact portion 31 and the third contact portion 41, and can be easily applied to existing and new tire manufacturing processes.

(5) In the tire hook 10 of the present embodiment, the holding part 11 has a front holding part 11A located on one side (front side) in the axial direction of the green tire RC, and a front holding part 11A located on the other side (rear side) in the axial direction of the green tire RC. side). The tire hook 10 holds the chafer CF on one axial side of the green tire RC by the front holding part 11A, and holds the chafer CF on the other axial side of the green tire RC by the rear holding part 11B. Hold.
According to the tire hook 10 configured as described above, the weight of the raw tire RC can be dispersed and held in the two holding parts 11 (the front holding part 11A and the rear holding part 11B), and the raw tire RC due to its own weight can be held. deformation can be further suppressed.

The tire hook described above may be applied not only to conveying raw tires but also to conveying tires after vulcanization.

10: Tire hook 11: Holding part 11A: Front holding part (one side holding part)
11B: Rear side holding part (other side holding part)
12: Hook body 20: First holding part 21: First contact part 22: First displacement mechanism 30: Second holding part 31: Second contact part 32: Second displacement mechanism 40: Third holding part 41: Third Contact portion 42: Third displacement mechanism 50: Link mechanism (conversion mechanism)
60: Spring (biasing part)
X1: First standby position X2: Second standby position X3: Third standby position Y1: First operating position Y2: Second operating position Y3: Third operating position RC: Raw tire CF: Chafer (inner diameter part)
CF1: 1st position CF2: 2nd position CF3: 3rd position

Claims (5)

A tire hook for holding a raw tire by hooking the inner diameter part of the raw tire in a position where the axial direction is substantially horizontal,
a first holding part that holds a first part located at the top of the inner diameter part;
a second holding part that holds a second position spaced apart from the top of the inner diameter part by a predetermined distance in the first circumferential direction;
a third holding part that holds a third position spaced from the top of the inner diameter part by the predetermined distance in a second circumferential direction opposite to the first circumferential direction;
a hook body that supports the holding part;
Equipped with a tire hook. The first holding part is
a first contact portion capable of contacting the green tire; a first operating position located when the green tire is placed on the first contact portion; and a first operating position when the green tire is not placed on the first contact portion; a first displacement mechanism that supports the first contact portion so as to be displaceable between a first standby position located at the first standby position;
The second holding part is
a second contact part capable of contacting the raw tire; and a second contact part supporting the second contact part so as to be displaceable between a second operating position in contact with the raw tire and a second standby position not in contact with the tire. Equipped with 2 displacement mechanisms,
The third holding part is
a third contact portion capable of contacting the raw tire; and a third contact portion supporting the third contact portion so as to be displaceable between a third operating position where the tire is contacted and a third standby position where the raw tire is not contacted. The tire hook according to claim 1, comprising three displacement mechanisms. further comprising a conversion mechanism that converts the displacement of the first contact part into the displacement of the second contact part and the third contact part,
When the first contact portion is displaced from the first standby position to the first operating position, the conversion mechanism displaces the second contact portion from the second standby position to the second operating position, The tire hook according to claim 2, wherein the third contact portion is displaced from the third standby position to the third operating position. The tire hook according to claim 3, further comprising a biasing part that biases the second contact part to the second standby position and biases the third contact part to the third standby position. The holding portion includes a one-side holding portion located on one side in the axial direction of the green tire, and a second-side holding portion located on the other side in the axial direction of the green tire,
The one side holding part holds the inner diameter part on one side in the axial direction of the green tire, and the other side holding part holds the inner diameter part on the other side in the axial direction of the green tire. The tire hook according to claim 1 or claim 2.

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