JP7229747B2 - Transfer device - Google Patents

Description

The present invention relates to transfer devices.

The raw tire forming machine includes a first drum for forming a tubular tread band (raw tire constituent member) including a tread portion, a second drum for forming a tubular carcass band including a bead portion and a side portion, and a tread. and a transfer device for transferring the band. The transfer device disclosed in Patent Document 1 includes a plurality of (six) segments that can move back and forth within a cylindrical frame, and these segments press and hold the outer circumference of a cylindrical tread band.

JP-A-62-222832

In the transfer device of Patent Literature 1, a plurality of segments can hold tread bands with different diameters. However, there is room for improvement in the uniformity of green tires in the transfer device of Patent Document 1 because pressure contact marks are left on the outer circumference of the tread band by the segments.

An object of the present invention is to provide a transfer device capable of improving the uniformity of a green tire to be molded.

The transfer device of the present invention includes a frame that accommodates the green tire constituent member inside so as to surround the outer circumference of the tubular green tire constituent member, and is arranged in the frame so as to face the green tire constituent member. A pair of segments each having a semi-cylindrical inner peripheral surface in surface contact with the outer peripheral surface, an advanced position for holding the raw tire component by the pair of segments, and holding the raw tire component by the pair of segments. and a pair of drive units for respectively advancing and retreating the pair of segments to allow delivery of the raw tire constituent members .

According to this transfer device, the pair of segments having the semi-cylindrical inner peripheral surfaces can hold and transfer the raw tire constituent members inside in a perfectly circular state. Therefore, it is possible to prevent pressure contact marks from being left on the outer periphery of the green tire constituent members by the segments, so that the uniformity of the green tire can be improved.

A first aspect of the present invention includes a control unit that controls the pair of driving units, and the control unit advances one of the pair of segments by the corresponding driving unit, and then moves the pair of segments. A transfer device is provided in which the other of the two is advanced by the corresponding drive unit . Specifically, the pair of segments are arranged on the upper and lower sides of the frame, respectively, and the control unit causes the lower segment of the pair of segments to advance by the corresponding drive unit. , the upper segment is advanced by the corresponding drive. According to this aspect, the segments can be reliably arranged on the outer periphery of the raw tire constituent member by aligning the axis of the raw tire constituent member with the axis of the pair of segments.

A second aspect of the present invention is provided with a pair of attachment members that are detachable from the pair of segments, respectively, and the attachment members are different raw tire constituent members having an outer diameter smaller than the outer diameter of the raw tire constituent members. A transfer device having a semi-cylindrical inner peripheral surface in surface contact with an outer peripheral surface is provided . According to this aspect, green tire constituent members having different outer diameters can be held in a perfectly circular state by one transfer device, so that the versatility of the transfer device can be improved.

A moving mechanism is provided for moving the green tire component to a first position for receiving the green tire component and a second position for delivering the green tire component.
A third aspect of the present invention is a cylindrical frame that can accommodate the raw tire constituent member inside so as to surround the outer periphery of the raw tire constituent member and has a larger outer diameter than the raw tire constituent member. , a pair of segments disposed facing each other in the frame and each having a semi-cylindrical inner peripheral surface in surface contact with the outer peripheral surface of the green tire component; The pair of segments are respectively advanced and retracted to an advanced position where the green tire constituent parts are held and a retracted position where the green tire constituent parts are released from the holding of the green tire constituent parts by the pair of segments, thereby allowing delivery of the raw tire constituent parts. and a pair of drives for.

In the transfer device of the present invention, since the green tire constituent members can be held in a perfect circle within the pair of segments, it is possible to prevent press contact marks from being left on the outer periphery of the green tire constituent members, thereby improving the uniformity of the green tire.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic of the raw tire molding machine using the transfer apparatus of embodiment of this invention. Sectional drawing of a transfer apparatus. FIG. 4 is a cross-sectional view showing a process of holding green tire constituent members by a transfer device; FIG. 4 is a cross-sectional view showing a state in which a raw tire constituent member is held by a transfer device; FIG. 4 is a cross-sectional view showing a state in which the attached member is attached to the transfer device;

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a raw tire forming machine 10 using a transfer device 20 according to an embodiment of the present invention. A raw tire molding machine 10 is a mechanism for molding a tubular tread band 1 (see FIG. 2) and a tubular carcass band 2 (see FIG. 2) and integrating them to form a raw tire. . Note that FIG. 2 shows a state in which the central portion of the carcass band 2 is crimped to the tread band 1 .

As shown in FIG. 1, a green tire forming machine 10 includes a forming drum 12 for forming a tread band (raw tire constituent member) 1 and a forming drum 15 for forming a carcass band 2. The transfer device 20 of this embodiment is provided between them. The transfer device 20 receives the tread band 1 formed by the forming drum 12, transfers it to the outer circumference of the carcass band 2 formed by the forming drum 15, and transfers it to the forming drum 15. - 特許庁Control of the forming drums 12 and 15 and the transfer device 20 is performed by a control unit 30 .

A forming drum 12 for the tread band 1 is rotatable about an axis A1 by means of a drive 13 . The forming drum 12 is formed in a cylindrical shape as a whole by arranging a plurality of plate-shaped segments 12a side by side in the circumferential direction. Each individual segment 12 a can be advanced and retracted radially about the axis A<b>1 by the drive unit 14 .

In the advanced state where the segment 12a is positioned radially outward, a belt, tread rubber, etc. are wound around the outer peripheral surface of the forming drum 12 to form the tubular tread band 1. As shown in FIG. By moving (retracting) the segment 12a radially inward, the tread band 1 can be separated from the forming drum 12 along the axis A1.

A forming drum 15 for the carcass band 2 is rotatable about an axis A2 by means of a drive 16 . The axis A2 of the forming drum 15 is located on the same straight line as the axis A1 of the forming drum 12 . The forming drum 15 has a flexible bladder 15a, and an expandable portion 15b that can be radially expanded about the axis A2 by the driving portion 17 is formed in the center.

An inner liner, a carcass ply, a bead core, a bead filler, a side rubber, and the like are wound around the forming drum 15 in a non-expanded state of the expandable portion 15b to form a cylindrical carcass band 2. As shown in FIG. With the tread band 1 arranged on the outer periphery of the carcass band 2 , the center portion of the carcass band 2 is crimped to the inner surface of the tread band 1 by expanding the diameter of the elastic portion 15 b. By reducing the diameter of the expandable portion 15b, the carcass band 2 including the tread band 1 can be removed from the forming drum 15 along the axis A2.

Also referring to FIG. 2 , the transfer device 20 includes a frame 22 , a segment 24 disposed within the frame 22 , and an air cylinder (drive section) 26 that drives the segment 24 . The transfer device 20 also includes a moving mechanism 27 for moving along a guide rail 18 provided between the forming drum 12 and the forming drum 15 . The moving mechanism 27 includes a plurality of rollers 27A arranged on the guide rail 18 and a drive motor 27B for driving these rollers 27. As shown in FIG.

The frame 22 is a cylindrical body that can surround and accommodate the outer periphery of the tread band 1 and has an inner diameter larger than the outer diameter of the tread band 1 . The frame 22 is arranged on the guide rails 18 so that the axis A3 of the frame 22 is aligned with the axes A1, A2 of the forming drums 12,15.

A plurality of segments 24 (two segments in this embodiment) are provided, and each segment 24 holds the tread band 1 on the inner peripheral surface located radially inward of the frame 22 . The same number of air cylinders 26 as the number of segments 24 are prepared, and the segments 24 are individually advanced and retracted in the radial direction of the frame 22 . The air cylinders 26 are arranged outside the segments 24 of the frame 22 , and rods 26 a passing through the frame 22 are attached to the segments 24 .

The transfer device 20 is moved by the moving mechanism 27 so as to surround the forming drum 12 , and the tread band 1 is held by the segment 24 advanced inward by the air cylinder 26 . Subsequently, the transfer device 20 is moved by the moving mechanism 27 so as to surround the forming drum 15 , thereby transferring the tread band 1 to the outer periphery of the carcass band 2 . In this state, the carcass band 2 is pressure-bonded to the tread band 1 by expanding the diameter of the elastic portion 15 b , and the tread band 1 is held by the forming drum 15 via the carcass band 2 . Thereafter, the segment 24 is retracted outward by the air cylinder 26 to release the tread band 1 from the transfer device 20 , and the transfer device 20 is moved to a neutral position between the forming drums 12 and 15 by the moving mechanism 27 .

The tread band 1 and the carcass band 2 held by the forming drum 15 are pressed from the outside by a pressing member (not shown) to be integrated to complete the raw tire. This green tire is removed from the forming drum 15 by a transfer mechanism (not shown) and transferred to the vulcanization molding machine in the next process.

When the tread band 1 is held by the transfer device 20, the uniformity of the green tire is deteriorated if pressure contact marks are left on the outer peripheral surface 1a of the tread band 1 by the segments 24.例文帳に追加Therefore, in this embodiment, as shown in FIG. 2, each segment 24 is configured by a semi-cylindrical member. Also, as shown in FIG. 4, the segment 24 is semi-cylindrical and has a pair of appendages 28 for holding tread bands 1' having different outer diameters. A plurality of pairs of attachment members 28 are provided for each raw tire (tread band) having a different outer diameter.

As shown in FIG. 2, the frame 22 includes a cylindrical main body 22a and a base 22b provided at the lower end of the main body 22a. The inner diameter of body 22 a is greater than the outer diameter of segment 24 . Specifically, the inner diameter of the main body 22a and the outer diameter of the segment 24 are set so that a movement space defined between the frame 22 and the segment 24 can be secured. This movement space can prevent interference between the segments 24 and the tread band 1 when the transfer device 20 is moved with the pair of segments 24 retracted as shown in FIG.

Continuing with FIG. 2, the pair of segments 24 are arranged in the frame 22 (main body 22a) to face each other vertically so as to move forward and backward in the vertical direction. Each segment 24 is a semi-cylindrical body having a first end face 24a and a second end face 24b that are coplanar. An inner peripheral surface 24c of the segment 24 located radially inside the frame 22 and facing the tread band 1 has a semi-cylindrical shape. In this embodiment, the outer peripheral surface 24d of the segment 24 located on the radially outer side has a concentric arc shape with the inner peripheral surface 24c, but may have a shape other than an arc.

The diameter of the inner peripheral surface 24c (the inner diameter of the segment 24) is set based on the raw tire having the largest outer diameter among a plurality of kinds of raw tires having different outer diameters. Specifically, the diameter of the inner peripheral surface 24c is set to be equal to or smaller than the outer diameter of the tread band 1 having the maximum outer diameter, including a defined tolerance, so as to come into surface contact with the outer peripheral surface 1a. If the diameter of the inner peripheral surface 24c is excessively larger than the outer diameter of the tread band 1, a gap is formed between the inner peripheral surface 24c and the outer peripheral surface 1a, so that the tread band 1 cannot be maintained in a perfectly circular state. , the uniformity of the raw tire deteriorates. If the diameter of the inner peripheral surface 24c is too small, the tread band 1 cannot be held in a perfectly circular state, and the interference between the end faces 24a and 24b leaves pressure contact marks on the outer peripheral surface 1a, resulting in poor uniformity of the raw tire. Therefore, the diameter of the inner peripheral surface 24c is adjusted to the outer diameter of the tread band 1 so that the inner peripheral surface 24c is in surface contact with the outer peripheral surface 1a without any gap and the tread band 1 can be held by the pair of segments 24. It is preferable to set them to be the same.

The semi-cylindrical inner peripheral surface 24c (segment 24) is not limited to a strict semi-cylindrical shape, and includes a substantially semi-cylindrical shape. Specifically, the inner peripheral surface 24c is not limited to a strictly semi-cylindrical shape in which the angle range from the first end surface 24a to the second end surface 24b is 180 degrees, and the angle from the first end surface 24a to the second end surface 24b is It may be substantially semi-cylindrical with an extent of less than 180 degrees. When the angle range of the inner peripheral surface 24c is less than 180 degrees, in the holding state of the tread band 1 shown in FIG. A gap is formed between one second end face 24b and the other first end face 24a. In this state, the angle range of the segment 24 may be less than 180 degrees as long as the tread rubber does not protrude from the gap between the end surfaces 24a and 24b and the outer peripheral surface 1a is not marked.

As described above, the air cylinders 26 are arranged above and below the outer surface of the frame 22 so as to correspond to the pair of segments 24 . A rod 26a passes through the frame 22 and is attached to a central portion of the segment 24 between the first end face 24a and the second end face 24b. As shown in FIG. 3B, by advancing the pair of rods 26a, the pair of segments 24 move to the advanced position where the tread rubber 1 is held. As shown in FIG. 2, by retracting the pair of rods 26a, the pair of segments 24 move to the retracted position where the tread rubber 1 is released.

As shown in FIG. 4, the pair of attachment members 28 are detachably attached to the pair of segments 24, respectively, and hold a different type of tread band 1' having an outer diameter smaller than the outer diameter of the tread band 1 described above. do. Each appendage 28 is semi-cylindrical having a first end face 28a and a second end face 28b which are coplanar. However, like segment 24, attachment member 28 is not limited to a strictly semi-cylindrical shape, but includes a substantially semi-cylindrical shape.

An inner peripheral surface 28c of the attached member 28 positioned radially inward is semi-cylindrical. An outer peripheral surface 28d of the attached member 28 positioned radially outwardly has a semi-cylindrical shape concentric with the inner peripheral surface 28c. Similar to the inner peripheral surface 24c of the segment 24, the diameter of the inner peripheral surface 28c is set equal to or smaller than the outer diameter of the tread band 1'. The diameter of the outer peripheral surface 28d is set to be the same as the diameter of the inner peripheral surface 24c of the segment 24, with a defined tolerance.

The attachment member 28 has a mounting piece 28e that protrudes radially outward. The attachment piece 28 e has an L-shaped cross section and is hooked onto the outer peripheral surface 24 d of the segment 24 . The attached member 28 is fixed to the segment 24 by bolting the mounting piece 28e to the segment 24, for example. In this case, the bolt holes formed in the segment 24 extend from the outer peripheral surface 24d toward the inner peripheral surface 24c and are constituted by non-through recesses closed on the inner peripheral surface 24c side.

Movement of the transfer device 20 by the movement mechanism 27 and movement of the segment 24 by the air cylinder 26 are performed by commands from the control unit 30 . In the following, the control when the tread band 1 is transported by the pair of segments 24 will be described, but the control when the attached member 28 is attached to the segments 24 is the same.

When the tread band 1 is held by the transfer device 20, as shown in FIG. Move in direction X toward drum 12 (first position). When the transfer device 20 moves to the forming drum 12, the controller 30 advances the lower segment 24 radially inward by the lower air cylinder 26 as shown in FIG. Then, the upper segment 24 is advanced radially inward by the upper air cylinder 26 . As a result, the pair of inner peripheral surfaces 24c are brought into pressure contact with the outer peripheral surface 1a, and the transfer 1 is held by the pair of segments 24. As shown in FIG. In this state, the transfer device 20 receives the tread band 1 from the forming drum 12 by retracting the segment 12 a radially inward.

When transferring the tread band 1 by the transfer device 20, the control unit 30 moves the transfer device 20 to the forming drum 15 (second position) by the moving mechanism 27 while maintaining the segment 24 at the advanced position shown in FIG. 3B. Move in the direction Y. When the transfer device 20 is moved to the forming drum 15 , the expansion/contraction portion 15 b of the forming drum 15 is expanded in diameter, so that the carcass band 2 is crimped to the tread band 1 .

Thereafter, when releasing the tread band 1 from the holding by the transfer device 20, the control unit 30 causes the upper air cylinder 26 to retract the upper segment 24 radially outward (see FIG. 3A). A cylinder 26 retracts the lower segment 24 radially outward (see FIG. 2). As a result, the pair of inner peripheral surfaces 24 c are separated from the outer peripheral surface 1 a and the transfer 1 is released from the pair of segments 24 , whereby the tread band 1 is transferred from the transfer device 20 to the forming drum 15 .

As described above, in the transfer device 20, the pair of segments 24 having the semi-cylindrical inner peripheral surfaces 24c can hold the tread band 1 inside in a perfectly circular state and transfer it. Therefore, it is possible to prevent pressure contact marks from being formed on the outer peripheral surface 1a of the tread band 1 by the segments 24, so that the uniformity of the raw tire can be improved.

By attaching an attachment member 28 to the segment 24, the tread band 1', which has a different diameter from the tread band 1, can be kept perfectly circular. Further, by exchanging the attachment member 28 according to the diameter of the tread band 1', it is possible to hold a plurality of types of tread bands 1' having different diameters, as in the conventional case, so that the versatility of the transfer device 20 can be improved.

In order to move one (lower side) of the pair of segments 24 and then move the other (upper side) of the pair of segments 24, the control unit 30 aligns the axis of the tread band 1 with the axis of the pair of segments 24, respectively, to move the tread. The segment 24 can be reliably arranged on the outer circumference of the band 1. - 特許庁Therefore, it is possible to prevent the occurrence of scars (dents) due to the interference of the end surfaces 24a and 24b of the segments 24 with the outer peripheral surface 1a, thereby preventing deterioration of the uniformity of the raw tire.

It should be noted that the transfer device 20 of the present invention is not limited to the configuration of the above embodiment, and various modifications are possible.

For example, the pair of segments 24 may be arranged with respect to the frame 22 so that the segments 24 are horizontally opposed to each other. The drive unit is not limited to the air cylinder 26, and may be modified as necessary as long as the segment 24 can move forward and backward between the advanced position and the retracted position. Also, the control of the transfer device 20 by the control section 30 can be changed as necessary.

The outer shape of the pair of segments 24 can be changed if necessary, provided that the portion facing the tread band 1 is provided with a semi-cylindrical inner peripheral surface 24c that is in surface contact with the outer peripheral surface 1a. Also, the shape of the frame 22 can be changed as required, as long as it has an inner surface shape corresponding to the outer surface shape of the pair of segments 24 . For example, the main body 22a of the frame 22 may have a square tubular shape, the segment 24 may have a square outer shape, and the segment 24 may have a semi-cylindrical inner peripheral surface 24c.

The transfer device 20 may be fixed and the forming drums 12, 15 may be movable. Moreover, all of the forming drums 12 and 15 and the transfer device 20 may be made movable, and the forming drum 12 and the transfer device 20, and the forming drum 15 and the transfer device 20 may be moved relatively.

1,1' tread band (raw tire component)
1a outer peripheral surface 2 carcass band 10 raw tire forming machine 12 forming drum 12a segment 13 driving device 14 driving section 15 forming drum 15a prada 15b expansion and contraction section 16 driving device 17 driving section 18 guide rail 20 transfer device 22 frame 22a main body 22b base 24 segment 24a first end face 24b second end face 24c inner peripheral face 24d outer peripheral face 26 air cylinder 26a rod 27 moving mechanism 27A roller 27B drive motor 28 attached member 28a first end face 28b second end face 28c inner peripheral face 28d outer peripheral face 28e mounting piece 30 control unit

Claims (6)

a frame that accommodates the raw tire constituent member inside so as to surround the outer periphery of the tubular raw tire constituent member;
a pair of segments disposed facing each other in the frame, each having a semi-cylindrical inner peripheral surface that is in surface contact with the outer peripheral surface of the green tire constituent member;
The pair of segments are advanced and retracted to an advanced position where the green tire component is held by the pair of segments and a retracted position where the green tire component is released from being held by the pair of segments, thereby forming the green tire structure. a pair of drive units for allowing delivery of the member ;
a control unit that controls the pair of driving units;
with
The transfer device, wherein the control unit advances one of the pair of segments by the corresponding driving unit, and then advances the other of the pair of segments by the corresponding driving unit. The pair of segments are arranged above and below the frame, respectively,
2. The transfer according to claim 1, wherein the control unit advances the lower segment of the pair of segments by the corresponding driving unit, and then advances the upper segment by the corresponding driving unit . Device. A pair of attachment members detachable from the pair of segments,
3. The attached member according to claim 1 , wherein the attached member has a semi-cylindrical inner peripheral surface that is in surface contact with an outer peripheral surface of a different raw tire constituent member having an outer diameter smaller than the outer diameter of the green tire constituent member. transfer device. a frame that accommodates the raw tire constituent member inside so as to surround the outer periphery of the tubular raw tire constituent member;
a pair of segments disposed facing each other in the frame, each having a semi-cylindrical inner peripheral surface that is in surface contact with the outer peripheral surface of the green tire constituent member;
The pair of segments are advanced and retracted to an advanced position where the green tire component is held by the pair of segments and a retracted position where the green tire component is released from being held by the pair of segments, thereby forming the green tire structure. a pair of drive units for allowing delivery of the member;
a pair of attachment members that can be attached to and detached from the pair of segments, respectively;
with
The transfer device, wherein the attached member has a semi-cylindrical inner peripheral surface that is in surface contact with an outer peripheral surface of a different raw tire constituent member having an outer diameter smaller than that of the raw tire constituent member. 5. The transfer device according to any one of claims 1 to 4, comprising a moving mechanism for moving the green tire component to a first position for receiving the green tire component and a second position for delivering the green tire component. a tubular frame that is capable of accommodating the raw tire constituent member inside so as to surround the outer circumference of the tubular raw tire constituent member and that is larger than the outer diameter of the raw tire constituent member;
a pair of segments disposed facing each other in the frame, each having a semi-cylindrical inner peripheral surface that is in surface contact with the outer peripheral surface of the green tire constituent member;
The pair of segments are moved back and forth between an advanced position attached to the frame and holding the green tire component by the pair of segments and a retracted position where the green tire component is released from the pair of segments. and a pair of drive units for allowing delivery of the raw tire constituent members
a transfer device.

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