KR20240061728A - Apparatus for replacing bladder of tire building drum - Google Patents

Abstract

The present invention relates to a tire building drum bladder replacement device. Specifically, according to one embodiment of the present invention, a bladder holding unit in which a ring-shaped bladder to be mounted on a tire forming drum is placed and held, at least a portion of which is movable in a radial direction; and a radial movement driving unit that moves at least a portion of the bladder mounting unit in a radial direction while the bladder is mounted on the bladder mounting unit so that the inner diameter of the bladder is expanded. A tire building drum bladder replacement device including a can be provided.

Description

Tire forming drum bladder replacement device {APPARATUS FOR REPLACING BLADDER OF TIRE BUILDING DRUM}

The present invention relates to a tire building drum bladder replacement device.

Generally, tires are mounted on a vehicle to support the entire load of the vehicle, buffer and absorb shock received from the road surface, and enable the vehicle to run, stop, and change direction through friction with the road surface.

These tires are manufactured by combining various tire semi-finished products such as body ply, inner liner, sidewall, belt, and tread. Tires after all tire semi-finished products are combined and before final vulcanization are called green tires.

Typically, the assembly of the inner liner, body ply, and sidewall semi-finished products is called the first semi-finished product case, and the assembly of the belt, cap ply, and tread semi-finished products is called the secondary semi-finished product case. And finally, by combining the first semi-finished product case and the second semi-finished product case, the green tire is completed.

In the molding process to complete a green tire, air is injected into the bladder mounted on the tire molding drum of the green tire molding machine, and operations such as shaping and bead seating are performed by flowing the rubber using the pressure of the air injected into the bladder. Green tires are made.

The bladder mounted on the tire building drum of the green tire building machine must be replaced when the rubber forming the bladder hardens and tears. Conventionally, when replacing the bladder mounted on a tire forming drum, the bladder does not stretch well, so replacement is not easy, takes a long time, and causes musculoskeletal disorders in workers.

Embodiments of the present invention were invented against the above background, and are a tire building drum bladder replacement method that facilitates replacement of the bladder by easily expanding the inner diameter of the ring-shaped bladder to be mounted on the tire building drum. We would like to provide a device.

According to one aspect of the present invention, a bladder holding unit in which a ring-shaped bladder to be mounted on a tire forming drum is placed and held, at least a portion of which is movable in a radial direction; and a radial movement driving unit that moves at least a portion of the bladder mounting unit in a radial direction while the bladder is mounted on the bladder mounting unit so that the inner diameter of the bladder is expanded. A tire building drum bladder replacement device including a can be provided.

In addition, the bladder mounting unit includes a plurality of radially movable segment members arranged at a predetermined distance from each other in the circumferential direction and moving in a radial direction so that the bladder is mounted; and a plurality of first bladder engaging members disposed on each of the plurality of radially movable segment members and extending in one direction so as to be respectively caught on an inner periphery of the bladder. can be provided.

In addition, the radial driving unit includes a lead screw shaft member disposed at the radial center of the plurality of radial segment members and configured to rotate; a lead screw nut member that moves along the leadscrew shaft member by rotation of the leadscrew shaft member; And one side of each is rotatably connected to the lead screw nut member so that the plurality of radially movable segment members move in the radial direction by movement of the leadscrew nut member along the leadscrew shaft member, and each other A tire building drum bladder replacement device may be provided, wherein the side includes a plurality of link members rotatably connected to each of the plurality of radially movable segment members.

Additionally, when the inner diameter of the bladder is expanded by the radial movement drive unit, a bladder supporter that is inserted into the bladder and can support the inner circumference of the bladder; A tire building drum bladder replacement device may be provided, further comprising:

Additionally, the bladder support includes a support body; and a plurality of second bladder locking members supported on the inner periphery of the support body and spaced apart from each other in the circumferential direction, wherein the bladder support is in a state in which the inner diameter of the bladder is expanded by the radial movement drive unit. A tire building drum bladder replacement device may be provided in which at least one of the plurality of first bladder locking members is disposed between the plurality of second bladder locking members when inserted into the bladder.

According to embodiments of the present invention, the inner diameter of the ring-shaped bladder to be mounted on the tire forming drum is easily expanded to facilitate replacement of the bladder, thereby shortening the bladder replacement time and improving work efficiency. There is an effect that it can be done.

Additionally, according to embodiments of the present invention, the effect on bladder quality can be minimized by increasing the inner diameter of the bladder relatively consistently.

Figure 1 is a front view of a tire building drum bladder replacement device according to an embodiment of the present invention, with some components removed for convenience of explanation.
Figure 2 is a plan view of the bladder mounting unit and radial movement driving unit of the tire building drum bladder replacement device according to an embodiment of the present invention.
Figure 3 is a plan view and a cross-sectional view of the bladder support of the tire building drum bladder replacement device according to an embodiment of the present invention.
Figures 4 to 7 show the inner diameter of the ring-shaped bladder to be mounted on the tire building drum being expanded by the tire building drum bladder replacement device according to an embodiment of the present invention, and then the bladder being mounted on the tire building drum. This is a drawing showing that.

Hereinafter, specific embodiments for implementing the technical idea of the present invention will be described in detail with reference to the drawings.

In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Additionally, when a component is mentioned as being 'connected' or 'supported' by another component, it should be understood that although it may be directly connected to or supported by the other component, other components may exist in between.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, in this specification, expressions such as circumferential direction, upward, radial outer, radial inner, upper, lower, up and down directions are explained based on the drawings, and it is to be understood in advance that they may be expressed differently if the direction of the object is changed. Let it be revealed. For the same reason, in the accompanying drawings, some components are exaggerated, omitted, or schematically shown, and the size of each component does not entirely reflect the actual size.

Additionally, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used only to distinguish one component from another.

As used in the specification, the meaning of "comprising" is to specify a specific characteristic, area, integer, step, operation, element, and/or component, and to specify another specific property, area, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of .

Hereinafter, the specific configuration of a tire building drum bladder replacement device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. The tire building drum bladder replacement device (1) according to an embodiment of the present invention expands the inner diameter of the ring-shaped bladder (3) to be mounted on the tire building drum (2) and then replaces the bladder (3) with the expanded inner diameter. ) can be mounted on the tire forming drum (2).

1 to 3, the tire building drum bladder replacement device 1 according to an embodiment of the present invention includes a bladder mounting unit 100, a radial movement drive unit 200, a support unit 300, and a bladder support 400.

Referring to FIG. 1, a ring-shaped bladder 3 to be mounted on the tire building drum 2 is placed and mounted on the bladder mounting unit 100, and at least a portion of the bladder 3 may be movable in a radial direction. The bladder holding unit 100 may include a plurality of radially movable segment members 110, a plurality of first bladder locking members 120, and a plurality of linearly movable guide members 130.

Referring to FIG. 2, the plurality of radially movable segment members 110 are arranged at a predetermined distance from each other in the circumferential direction so that the bladder 3 is mounted and can move in the radial direction. The plurality of radially movable segment members 110 are disposed at a predetermined distance from each other in the circumferential direction on the support plate 310, which will be described later, included in the support unit 300, and can move in the radial direction. The bladder 3 may be placed and mounted on a plurality of radially movable segment members 110 arranged at a predetermined distance from each other in the circumferential direction. In this case, each of the plurality of radially movable segment members 110 may support the bladder (3). For example, the radially movable segment member 110 may be a plate with a shape similar to part of a fan. Additionally, the bladder 3 may be placed and mounted on a plurality of radially movable segment members 110, which are plates with a shape similar to a portion of a fan. That is, each of the plurality of radially movable segment members 110, which are plates with a shape similar to part of a fan, can support the bladder 3.

The plurality of radially movable segment members 110 may move in a radial direction. For example, each of a plurality of linear movement guide members 130, which will be described later, may be disposed on the support plate 310 of the support unit 300 at a predetermined distance from each other in the circumferential direction. Additionally, each of the plurality of radial movement segment members 110 may be connected to each of the plurality of linear movement guide members 130. By this configuration, a plurality of radially movable segment members 110 are disposed at a predetermined distance from each other in the circumferential direction on the support plate 310 of the support unit 300 and can move in the radial direction.

Referring to FIGS. 1 and 2 , one or more first bladder engaging members 120 are respectively disposed on a plurality of radially movable segment members 110 and may extend in one direction. In addition, the plurality of first bladder locking members 120 are moved in the radial direction of the plurality of radially movable segment members 110, and the inner circumference of the bladder 3 placed and mounted on the plurality of radially movable segment members 110 Each can be caught and the inner diameter of the bladder (3) can be expanded. For example, the first bladder engaging member 120 may be disposed on the radially movable segment member 110 and extend upward. Additionally, two first bladder engaging members 120 may be disposed on the radially movable segment member 110. Additionally, the plurality of first bladder locking members 120 may form a virtual circle. Accordingly, when the plurality of radially movable segment members 110 move in the radial direction, the diameter of the virtual circle formed by the plurality of first bladder engaging members 120 increases and lies on the plurality of radially movable segment members 110. It can be caught on the inner circumference of the mounted bladder (3) and expand the inner diameter of the bladder (3).

The plurality of linear movement guide members 130 may allow the plurality of radial movement segment members 110 to move in the radial direction. To this end, each of the plurality of linear movement guide members 130 may be disposed on the support plate 310 of the support unit 300 at a predetermined distance from each other in the circumferential direction. Additionally, each of the plurality of radial movement segment members 110 may be connected to each of the plurality of linear movement guide members 130. By this configuration, a plurality of radial movable segment members 110 are disposed at a predetermined distance from each other in the circumferential direction on the support plate 310 of the support unit 300 and move in a radial direction along each of the plurality of linear movable guide members 130. You can move to . For example, the linear movement guide member 130 may be an LM guide.

The radial movement drive unit 200 moves at least a portion of the bladder holder 100 in a state in which the bladder 3 is mounted on the bladder mount unit 100 so that the inner diameter of the bladder 3 is expanded. It can be moved in a radial direction. The radial movement drive unit 200 may include a leadscrew shaft member 210, a leadscrew nut member 220, a plurality of link members 230, and a handle 240.

Referring to FIGS. 1 and 2 , the lead screw shaft member 210 may be disposed at the radial center of the plurality of radially movable segment members 110 and be rotatable. The lead screw shaft member 210 may be rotatably disposed on a portion of the support plate 310 of the support unit 300 corresponding to the radial center of the plurality of radially movable segment members 110. For example, the bearing 311 may be disposed on a portion of the support plate 310 of the support unit 300 corresponding to the radial center of the plurality of radially movable segment members 110. Additionally, the lower portion of the lead screw shaft member 210 may be rotatably disposed on the bearing 311 of the support plate 310. That is, the lead screw shaft member 210 can be rotated while being disposed perpendicular to the support plate 310 of the support unit 300. Meanwhile, external threads (not shown) may be formed on the outer circumference of the lead screw shaft member 210.

The leadscrew nut member 220 may move along the lead screw shaft member 210 by rotation of the leadscrew shaft member 210. A through hole (not shown) through which the lead screw shaft member 210 penetrates may be formed in the lead screw nut member 220. Additionally, the leadscrew nut member 220 may be connected to the leadscrew shaft member 210 so that the leadscrew shaft member 210 penetrates the through hole of the leadscrew nut member 220. Additionally, a female thread (not shown) that engages with the male thread on the outer circumference of the lead screw shaft member 210 may be formed in the through hole of the lead screw nut member 220. The leadscrew nut member 2200 may be connected directly or indirectly to the plurality of link members 230 so that it does not rotate with respect to the plurality of link members 230 even when the lead screw shaft member 210 is rotated. When the leadscrew shaft member 221 rotates, the leadscrew nut member 220 rotates relative to the leadscrew shaft member 210, thereby moving along the thread formed on the lead screw shaft member 210, and the lead screw nut member 220 rotates relative to the leadscrew shaft member 210. The screw nut member 220 can move on the lead screw shaft member 210 by moving along the screw thread. For example, when the leadscrew shaft member 210 is disposed perpendicular to the ground, the leadscrew nut member 222 moves vertically along the leadscrew shaft member 210 by rotation of the leadscrew shaft member 210. You can move to .

The plurality of link members 230 move the lead screw nut member 220 along the lead screw shaft member 210, so that the plurality of radial movable segment members 110 of the bladder mounting unit 100 move in the radial direction. You can make it move. One side of each of the plurality of link members 223 is rotatably connected to the lead screw nut member 220, and the other side of each of the plurality of link members 230 is connected to a plurality of radial segments of the bladder holding unit 100. It may be rotatably connected to each member 110. As the leadscrew nut member 220 moves along the leadscrew shaft member 210, the plurality of radially movable segment members 110 may move in the radial direction. For example, as the leadscrew nut member 220 descends along the leadscrew shaft member 210, the plurality of radially movable segment members 110 may move outward in the radial direction. Additionally, as the lead screw nut member 220 rises along the lead screw shaft member 210, the plurality of radially movable segment members 110 may move inward in the radial direction.

The handle 240 may be connected to the leadscrew shaft member 210 so that the leadscrew shaft member 210 rotates. With this configuration, the operator can hold the handle 240 and rotate the lead screw shaft member 210. The handle 240 may be connected to a portion opposite to the portion of the lead screw shaft member 210 that is rotatably disposed. For example, the handle 240 may be connected to the top of the leadscrew shaft member 210.

The support unit 300 may support the bladder mounting unit 100 and the radial movement driving unit 200. The support unit 300 may include a support plate 310 and a support frame 320.

The support plate 310 may support the bladder mounting unit 100 and the radial movement driving unit 200. A plurality of linear movement guide members 130 of the bladder mounting unit 100 may be disposed on the support plate 310 at a predetermined distance from each other in the circumferential direction. Additionally, a bearing 311 that rotates and supports the lead screw shaft member 210 of the radial drive unit 200 may be disposed on the support plate 310. For example, the bearing 311 may be disposed on a portion of the support plate 310 of the support unit 300 corresponding to the radial center of the plurality of radially movable segment members 110 of the bladder mounting unit 100. .

The support frame 320 may support the support plate 310. The support frame 320 may be formed by connecting a plurality of frame members 321 to each other. For example, a plurality of frame members 321 may be connected to each other to form a support frame 320 having a hexahedral shape. Wheels 322 may be connected to the lower part of the support frame 320. Additionally, a brake 323 may be disposed on the wheel 322. In this configuration, when the wheel 322 is rotated, the tire building drum bladder replacement device 1 can be moved to a desired location by the wheel 322. After moving the tire forming drum bladder replacement device (1) to the desired location, if the wheel (322) is prevented from rotating by the brake (323), the bladder replacement device (1) of the forming drum that has moved to the desired location is You can prevent it from moving.

Referring to FIG. 3, when the inner diameter of the bladder (3) is expanded by the radial movement drive unit (200), the bladder support body (400) is inserted into the bladder (3) to cover the inner circumference of the bladder (3). I can support it. The bladder support 400 may include a support body 410 and a plurality of second bladder locking members 420.

The support body 410 may be mounted on the tire building drum 2. For this purpose, the support body 410 may have a ring shape. Additionally, the inner diameter of the support body 410 may be larger than the diameter of the tire building drum 2. Accordingly, the support body 410 can be mounted on the tire building drum 2 so that the tire building drum 2 passes through it. A handle 411 may be formed on the outer periphery of the support body 410. Accordingly, the user can move the bladder support body 400 by holding the handle 411 on the outer periphery of the support body 410.

The plurality of second bladder locking members 420 may be supported on the inner circumference of the support body 410 and spaced apart from each other in the circumferential direction. The diameter of the virtual circle formed by the outer peripheral surface of the plurality of second bladder engaging members 420 may be larger than the diameter of the virtual circle formed by the inner peripheral surface of the plurality of first bladder engaging members 120. When the bladder support 400 is inserted into the bladder 3 with the inner diameter of the bladder 3 expanded by the radial drive unit 200, a plurality of second bladder locking members 420 In between, one or more of the plurality of first bladder holding members 120 of the bladder holding unit 100 may be disposed. Accordingly, the inner circumference of the bladder 3 with an expanded inner diameter can be supported by the plurality of second bladder locking members 420. In addition, while the inner circumference of the bladder 3 with the expanded inner diameter is supported by the plurality of second bladder holding members 420, the bladder support 400 is moved to form the bladder 3 with the expanded inner diameter. ) can be separated from the plurality of first bladder holding members 120 of the bladder holding unit 100. In addition, while the inner circumference of the bladder 3 with an expanded inner diameter is supported by the plurality of second bladder holding members 420, the bladder support 400 is placed on the tire building drum on which the bladder 3 is to be mounted. It can be moved to (2).

Hereinafter, with reference to FIGS. 4 to 7, the operation and effects of the tire building drum bladder replacement device 1 having the above-described configuration will be described.

As shown in FIG. 4, the ring-shaped bladder 3 to be mounted on the tire building drum 2 is placed on the plurality of radially movable segment members 110 of the bladder mounting unit 100. In this case, the first bladder holding member 120 of the bladder holding unit 100 may be located inside the inner circumference of the bladder (3). In this state, when the operator rotates the handle 240 of the radial drive unit 200, the lead screw nut member 220 of the radial drive unit 200 moves along the lead screw shaft member 210, The plurality of radially movable segment members 110 of the bladder holding unit 100 may move in a radial direction.

As shown in FIG. 5, by the radial movement of the plurality of radial movable segment members 110 of the bladder mounting unit 100, the plurality of first bladder locking members of the bladder mounting unit 100 ( 120) are respectively caught on the inner circumference of the bladder (3) and can expand the inner diameter of the bladder (3).

With the inner diameter of the bladder 3 expanded in this way, the bladder support 400 can be moved to the bladder holding unit 100. In addition, as shown in FIG. 6, the bladder support 400 is inserted into the bladder 3 with an expanded inner diameter, and the bladder holding unit 100 is installed between the plurality of second bladder holding members 420. ), one or more of the plurality of first bladder locking members 120 may be disposed. Accordingly, the inner circumference of the bladder 3 with an expanded inner diameter can be supported by the plurality of second bladder locking members 420.

With the inner circumference of the bladder 3 with the expanded inner diameter supported by the plurality of second bladder holding members 420, the bladder support 400 is moved to allow the bladder 3 with the expanded inner diameter to be It can be separated from the plurality of first bladder holding members 120 of the bladder holding unit 100. In addition, while the inner circumference of the bladder 3 with an expanded inner diameter is supported by the plurality of second bladder holding members 420, the bladder support 400 is placed on the tire building drum on which the bladder 3 is to be mounted. It can be moved to (2).

As shown in FIG. 7, with the plurality of second bladder holding members 420 supporting the inner periphery of the bladder 3 with an expanded diameter, the support body 410 of the bladder support 400 is It can be mounted on the tire forming drum (2). With the support body 410 mounted on the tire building drum 2 in this way, the support body 410 can be moved on the tire building drum 2 to a position where the bladder 3 is to be mounted. In addition, a plurality of second bladder holding members 420 supporting the inner periphery of the bladder 3 with an expanded diameter are installed so that the bladder 3 with an expanded diameter is mounted on the tire building drum 2. It can be separated from the inner circumference of (3). Thereby, the bladder 3 can be mounted on the tire building drum 2.

As described above, according to the tire building drum bladder replacement device 1 according to an embodiment of the present invention, the inner diameter of the ring-shaped bladder 3 to be mounted on the tire building drum 2 is easily expanded. This has the effect of allowing the bladder 3 to be easily replaced. Accordingly, there is an effect of shortening the bladder 3 replacement time and improving work efficiency.

Meanwhile, as described above, by the radial movement of the plurality of radial movable segment members 110 of the bladder holding unit 100, the plurality of first bladder locking members of the bladder holding unit 100 are moved to the bladder. Since each is caught on the inner circumference of (3) and expands the inner diameter of the bladder (3), the effect on the quality of the bladder (3) can be minimized by making the inner diameter of the bladder (3) relatively constant. there is.

Although embodiments of the present invention have been described above as specific embodiments, this is merely an example, and the present invention is not limited thereto, and should be construed as having the widest scope following the technical idea disclosed in this specification. A person skilled in the art may implement a pattern of a shape not specified by combining/substituting the disclosed embodiments, but this also does not depart from the scope of the present invention. In addition, a person skilled in the art can easily change or modify the embodiments disclosed based on the present specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

1: Tire building drum bladder replacement device 2: Tire building drum
3: Bladder 100: Bladder holding unit
110: Radial movement segment member 120: First bladder catching member
130: Linear movement guide member 200: Radial movement drive unit
210: Leadscrew shaft member 220: Leadscrew nut member
230: Link member 240: Handle
300: support unit 310: support plate
311: bearing 320: support frame
321: frame member 322: wheel
323: Brake 400: Bladder support
410: support body 411: handle
420: Second bladder catching member

Claims (5)

A bladder holding unit in which a ring-shaped bladder to be mounted on a tire forming drum is placed and held, at least a portion of which is movable in a radial direction; and
a radial movement driving unit that moves at least a portion of the bladder mounting unit in a radial direction while the bladder is mounted on the bladder mounting unit so that the inner diameter of the bladder is expanded; Including,
Tire building drum bladder replacement device. According to claim 1,
The bladder holding unit,
a plurality of radially movable segment members arranged at a predetermined distance from each other in the circumferential direction and moving in a radial direction so that the bladder is mounted; and
Comprising a plurality of first bladder engaging members each disposed on one or more of the plurality of radially movable segment members and extending in one direction so as to be respectively caught on an inner periphery of the bladder,
Tire building drum bladder replacement device. According to claim 2,
The radial movement driving unit is
A lead screw shaft member disposed at the radial center of the plurality of radially movable segment members and configured to rotate;
a lead screw nut member that moves along the lead screw shaft member as the lead screw shaft member rotates; and
One side of each is rotatably connected to the leadscrew nut member so that the plurality of radially movable segment members move in the radial direction by movement of the leadscrew nut member along the leadscrew shaft member, and each other side is rotatably connected to the leadscrew nut member. Comprising a plurality of link members rotatably connected to each of the plurality of radially movable segment members,
Tire building drum bladder replacement device. According to claim 2,
a bladder supporter that is inserted into the bladder and can support the inner circumference of the bladder when the inner diameter of the bladder is expanded by the radial movement drive unit; Containing more,
Tire building drum bladder replacement device. According to claim 4,
The bladder support is
support body; and
It includes a plurality of second bladder engaging members supported on the inner periphery of the support body and spaced apart from each other in the circumferential direction,
When the bladder support body is inserted into the bladder with the inner diameter of the bladder expanded by the radial drive unit, the plurality of first bladders are caught between the plurality of second bladder locking members. One or more of the members are placed,
Tire building drum bladder replacement device.

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