JPH11123775A - Method for cutting cord-embedded tire member and cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely cut a cord-embedded tire member such as a carcass member along a cord while keeping a freed state constantly in a statisfactory state. SOLUTION: When a band-like cord-embedded tire member in which a cord is arranged in the width direction is cut on an elavating bar 2 attached a conveyor belt, a part T1 to be cut is uplifted from the elevating bar 2 using a forward and a backward lifting means 3 respectively, which are provided in the elevating bar 2, then is clamped between a forward and backward holding means arranged above and both right/left cutting blade 53A, 53B are caused to cut into the part T1. Further, the part T1 is cut in such a manner that it is incised open to the right and the left along the cord.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting a corded tire member, and more particularly, to a cord in which a corded tire member is reliably cut along the cord without cutting the cord. The present invention relates to a method and an apparatus for cutting a tire member containing a tire.

[0002]

2. Description of the Related Art In general, a carcass layer of a pneumatic tire is formed in a long length in advance, and a carcass member wound on a winding drum is pulled out from the drum, and a predetermined length of the carcass is wound along a carcass cord on a conveyor belt. After cutting into pieces,
The cut carcass member is wound around a forming drum and formed.

Conventionally, in the carcass layer forming process as described above, when cutting a carcass member, for example, there has been proposed a technique in which a cut portion is lifted off a conveyor belt and cut (Japanese Patent Laid-Open No. 58-163639). No.). By cutting the portion to be cut in a state of being raised from the surface of the conveyor belt, there is an advantage that the carcass cords densely arranged can be cut along the cords without cutting. .

[0004] However, in order to lift the carcass member, the conveyor belt is divided into two parts, left and right.
In the meantime, the means for lifting the carcass member is arranged, so due to the slight difference in the thickness of the left and right conveyor belts and the error in the diameter of the pulley around which the conveyor belt is wound,
There has been a problem that the left and right feed amounts are different, and that the carcass member is sunk or caught in the central division.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a corded tire member capable of reliably cutting a corded tire member such as a carcass member along a cord while always maintaining a good feed state. An object of the present invention is to provide a cutting method and apparatus.

[0006]

According to the present invention, there is provided a method for cutting a corded tire member according to the present invention, which comprises a belt-shaped corded tire member having cords arranged in a width direction on an elevator bar provided on a conveyor belt. When cutting
A corded tire in which the left and right cutting blades are lifted after the cut portions are lifted from the elevator bar by front and rear lift means provided in the elevator bar, respectively, and clamped between front and rear pressing means disposed above. The member is cut into a cut portion, and the cut portion is cut open left and right along a cord.

In the cording tire member cutting device of the present invention, an elevator bar is installed on a conveyor belt for transporting a belt-shaped corded tire member, and the corded tire member is lifted up and down from the elevator bar in the elevator bar. Providing possible front and rear lift means,
Pressing means for clamping the corded tire member between the front and rear lift means and the lift means in a protruding state is provided, and a width of the corded tire member is provided above the front and rear lift means. Left and right cutting blades that can reciprocate so as to open and close in a direction are arranged so as to be able to move up and down.

As described above, the cut portion of the corded tire member is lifted by the front and rear lift means provided in the elevator bar provided on the conveyor belt.
There is no need to divide the conveyor belt into two parts as in the conventional case. Therefore, it is possible to always maintain a good feed state without causing a problem that the feed amounts on the left and right are different and that the carcass member is sunk or caught in the central division.

Further, since the cut portion of the corded tire member is lifted up and cut open to the left and right along the cord, the cut portion is not strongly tightened but slightly loosened. Since the cords can be cut, even if there is a slight angle deviation between the cutting angles and the densely arranged cords, the cords can always be reliably cut along the cords without cutting the cords.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 show an example of a corded tire member cutting device of the present invention. 1 is a belt conveyor that conveys a belt-shaped corded tire member T in which cords are arranged in the width direction, 2 is an elevator bar that raises and lowers the corded tire member T, and 3 is a lift that lifts the belt-shaped corded tire member T from the elevator bar 2. Means 4,
Is holding means for clamping the lifted corded tire member T, and 5 is cutting means for cutting the corded tire member T along the cord.

The belt conveyor 1 has a conveyor belt 11 for transporting a belt-shaped corded tire member T. On this conveyor belt 11, an elevator bar 2 traverses the conveyor belt 11 in the width direction, and the surface of the conveyor belt 11 11a. As shown in FIG. 4, the elevator bar 2 has a cross-sectional shape formed in a mountain shape in which the central portion in the longitudinal direction of the conveyor belt gradually rises, and the central portion 21 has the conveyor belt 1.
1 is provided with a groove portion 22 crossing in the width direction.

Lift means 3 are provided in the elevator bar 2 before and after in the transport direction R with the groove 22 interposed therebetween. As shown in FIG. 3, both lifting means 3 are hinges 31.
Right and left lift plates (lift members) 32 connected along the longitudinal direction of the elevator bar 2
a and 32b. This lift plate 32a,
32b is arranged in the accommodation space 23 in the elevator bar 2 as shown by a two-dot chain line in FIG.

The left end (one end) of the left (one end) lift plate 32 a is fixed to a fixed plate 34 via a hinge 33. Right (other end) lift plate 32b
Is connected to the left end of a sliding rod 36 slidable along the longitudinal direction of the elevator bar 2 via a hinge 35. At the right end of the sliding rod 36 is the connecting rod 3
The connecting rod 37 has a right end protruding from the right end of the elevator bar 2 as shown in FIG.

A sliding cylinder 38 is disposed on the right end of the elevator bar 2, and a rod 38 protruding rightward thereof is provided.
The right end of the connecting rod 37 is connected to the lower end of the connecting plate 39 which is hung at the end of the sliding plate a. The sliding rod 36 is reciprocated right and left by the operation of the sliding cylinder 38, and the lift plates 32a and 32b are moved to FIG. In the two-dot chain line and the solid line.

A horizontal member 7 extending across the conveyor belt 11 in the width direction is disposed between the upper ends of the columns 6 and 6 erected at both ends of the elevator bar 2. Means 4 and cutting means 5 are provided. The holding means 4 is disposed above the front and rear lifting means 3, 3, respectively, and has a holding block 42 at the lower end of a supporting plate 41 which is respectively suspended on the front and rear (transport direction R) surfaces of the center of the horizontal member 7. doing. The corded tire member T is clamped between the lower surfaces of the front and rear holding blocks 42 and the hinges 31 between the lift plates 32a and 32b that have been raised to the protruding positions.

The cutting means 5 has a pair of left and right slide members 52a, 52b which can reciprocate left and right along a guide rail 51 extending along the longitudinal direction on the lower surface of the horizontal member 7. Cutting blades 53A and 53B are attached to the lower end of 52b so as to be located above the front and rear lift means 3, respectively. The left cutting blade 53A has a blade portion 53a formed along the left edge portion having the concave portion x, and the right cutting blade 53B has a blade portion 53b formed along the right edge portion having the concave portion x.

On both ends of the horizontal member 7, left and right sprockets 54, 54 having a vertical rotation axis are disposed, and an endless chain 55 is wound therebetween.
A cutting cylinder 57 is installed on one side of the horizontal member 7, and the tip of the rod 55 a is connected to the chain 55 via a connecting piece 56. Further, the slide members 52a and 52b are respectively connected to the chain 55, and when the chain 55 rotates in one direction by the operation of the cutting cylinder 57, the slide members 52a and 52b move in the opening direction, and the chain 55 moves in the other direction. , The slide members 52a and 52b move in the closing direction, and the left and right cutting blades 5
3A and 53B are reciprocally movable so as to open and close in the width direction of the corded tire member T. Also, the cutting blade 53
A and 53B can be moved up and down by a guide air cylinder (not shown) attached to the slide members 52a and 52b.

A support arm 8 extending in the width direction of the conveyor belt 11 is connected to an upper surface of a central portion of the horizontal member 7 through a connecting portion 9, and a nut 9 b screwed into a bolt 9 a of the connecting portion 9. And the horizontal member 7 is rotated right and left around the bolt 9a as indicated by an arrow Y, so that the angle of the horizontal member 7 with respect to the transport direction R of the conveyor belt 11, that is,
The cutting angles of the cutting blades 53A and 53B can be changed. The elevator bar 2 is arranged so as to contact the conveyor belt surface 11a by the support of the support arm 8.

According to the method for cutting a corded tire member of the present invention, when the cut portion T1 of the belt-shaped corded tire member T conveyed on the conveyor belt 11 comes to the elevation bar 2, The sliding cylinder 38 of each of the lifting means 3 is operated to move the sliding rod 36 to the left, and lift plates 32a and 32b are moved in FIG.
It is raised to the position shown in FIG. Thereby, the cutting portion T
1 is lifted from the elevator bar 2 and clamped between the holding block 42 of each of the front and rear holding means 4 disposed above and the hinge 31 between the lift plates 32a and 32b.

Next, the left and right cutting blades 53A and 53B are lowered, and the cut portion T1 lifted as shown in FIG.
After cutting, the rod 57a of the cutting cylinder 57
Is extended to rotate the chain 55 in one direction, thereby moving the slide members 52a and 52b in the left and right opening directions. With the movement of the slide members 52a and 52b, the left and right cutting blades 53A and 53B move in the opening direction in the groove portion 22 of the elevator bar 2 and cut while cutting open right and left along the cord so as to hang the cut portion T1 on the concave portion x. (FIG. 5C). Since the cut portion T1 is in a state of being lifted, the cut portion T1 does not become a state in which the cut portion T1 is strongly tightened but has a state in which the cut portion T1 has a slight slack. Even if there is, the cord can always be reliably cut along the cord, and the cord is not cut. Further, since the cut portion T1 is lifted from the elevator bar 2 by the front and rear lift means 3, 3 provided in the elevator bar 2 disposed on the conveyor belt 11, the conveyor belt can be handled without being divided into two right and left parts. Therefore, there is no problem such as a difference between the left and right feed amounts as in the related art, so that a good feed state can always be maintained.

After the cutting, the sliding rod 36 is moved leftward by the operation of the sliding cylinder 38 of each lift means 3.
The lift plates 32a and 32b are lowered to the sunk position in FIG. On the other hand, the cutting blades 53A, 5
After 3B has risen, the operation of the cutting cylinder 57 causes
The chain 55 rotates in the other direction, and the slide members 52a,
52b moves in the closing direction, and the left and right cutting blades 53A, 53
B is returned to the closed position shown in FIG.

In the present invention, it is preferable that the elevator bar 2, the holding means 4, and the cutting device 5 are integrally formed with the support 6 and the horizontal member 7 as described above, thereby changing the cutting angle. In this case, it can be moved integrally, so that the setup change operation can be performed extremely easily, and a wide range of cutting angles can be accommodated. In the above-described embodiment, the left and right lift plates 32a, 32b connected via the hinge 31 are used to lift the corded tire member T by the lift means 3, but instead of one spring, A plate may be used.

The present invention can be preferably used particularly for cutting a carcass member as the corded tire member T, but is not limited thereto. The cord extends in the member width direction (even if it is parallel to the width direction, the cord is inclined). May be extended)
As long as the strip-shaped corded tire members T arranged as described above are cut along the cord, any corded tire member can be suitably used.

[0024]

As described above, according to the present invention, when a belt-shaped corded tire member is cut, the cut portion is lifted up by front and rear lift means provided in an elevator bar disposed on a conveyor belt, and arranged upward. After being clamped between the front and rear holding means, it is cut by the left and right cutting blades so that it is cut open to the right and left along the cord. The corded tire member can be reliably cut along the cord while always maintaining a good state.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an example of a corded tire member cutting device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional view of a main part of FIG.

FIG. 4 is a view taken in the direction of arrows BB in FIG. 3;

FIGS. 5A to 5D are explanatory views showing a method for cutting a corded tire member of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Elevator bar 3 Lift means 4 Holding means 5 Cutting means 7 Horizontal member 8 Support arm 9 Connecting part 11 Conveyor belt 11a Surface 22 Groove parts 31, 33, 35
Hinge 32a, 32b Lift plate 36 Connecting rod 38 Cylinder 42 Holding block 51 Guide rail 52a, 52b
Slide member 53A, 53B Cutting blade 57 Cutting cylinder T Corded tire member T1 Cutting part x recess

Claims (4)

[Claims] When cutting a belt-shaped corded tire member in which cords are arranged in a width direction on an elevator bar provided on a conveyor belt, the cut portion is provided by front and rear lift means provided in the elevator bar. After each lifted from the elevator bar and clamped between the front and rear pressing means disposed above, the left and right cutting blades are cut into the cut portions of the lifted corded tire member, and the cut portions are cut into cords. A method for cutting a corded tire member that cuts open and cut along the left and right. 2. An elevator bar is provided on a conveyor belt for transporting a belt-shaped corded tire member, and lift means is provided in the elevator bar for retracting the corded tire member from the elevator bar. Pressing means for clamping the corded tire member is provided above the lift means and between the lift means in the extended state, and opened and closed in the width direction of the corded tire member above the front and rear lift means. A cutting device for a corded tire member in which left and right cutting blades that can reciprocate are arranged to be able to move up and down. 3. The lift means has a lift member extending in the width direction of the conveyor belt within the elevator bar so as to be able to protrude and retract, and a reciprocally movable connection rod is connected to an end of the lift member. 3. The cutting device for a corded tire member according to claim 2, wherein the lift member protrudes and retracts by moving the connecting rod. 4. The cutting device for a corded tire member according to claim 2, wherein the elevator bar, the pressing member, and the cutting blade are configured to be integrally movable.