JP2017132143A - Cutting device and method for strip-shaped rubber member for tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device and method for a strip-shaped rubber member for tire capable of favorably cutting the rubber member without taking risks of burn.SOLUTION: A cutting device for a strip-shaped rubber member comprises: a cutter blade for cutting the strip-shaped rubber member supported on a support table in a width direction; plural rollers rotating so that a tension toward outside in the width direction is applied to the rubber member by pressing the surface of the rubber member at the front position of the cutter blade in a cutter blade-moving direction; and a retention mechanism which retains the cutter blade to have a cutter blade lifting means for lifting from and lowering on the support table and also has plural rollers to move along a rubber member width direction. By movement of the retention mechanism, the cutter blade cuts the rubber member while applying the tension toward outside in the width direction to the rubber member by plural rollers.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tire-like rubber member for a tire, which is obtained by cutting a belt-like rubber member for tire (hereinafter also referred to as “PLY”) produced by coating a topping rubber on a cord into a predetermined length before being attached to a tire molding drum. The present invention relates to a cutting apparatus and a cutting method.

  Generally, in a pneumatic tire manufacturing process, a radial tire carcass or the like in which a cord is arranged in the width direction of a belt-like rubber member, for example, is used as a PLY produced by covering a cord with a topping rubber.

  And such PLY is cut | disconnected by the predetermined length in the middle of being carried on the conveyor for conveyance and a tire shaping | molding drum, Then, it affixes on a tire shaping | molding drum (for example, patent document 1).

  FIG. 4 is a schematic view of a conventional cutting device for a belt-shaped rubber member for a tire as viewed from the side of the cutter blade, and FIG. 5 is a schematic view of the cutting device for a conventional belt-shaped rubber member for a tire as viewed from the front in the advancing direction of the cutter blade. FIG.

  As shown in FIGS. 4 and 5, the cutting device 50 includes a cutting support base 52 provided with a gap 54 through which the cutter blade 56 passes, and a PLY for preventing a PLY misalignment during cutting. A pair of presser plates 58 that are pressed from the upper surface side are provided. Then, the presser plate 58 is pressed about 1/3 from the PLY cutting start position, the cutter blade 56 is positioned in the gap between the presser plate 58 and the cutting support 52, and the cutter blade 56 is moved in the PLY width direction. By doing so, the PLY is cut.

  However, when the number of times of cutting increases, the cutting of the cutter blade 56 becomes worse, and PLY cutting failure occurs. Thus, the heater 60 is provided on the cutter blade 56 to heat the cutter blade 56, thereby suppressing the occurrence of cutting defects.

Japanese Patent No. 2628826

  However, when the PLY is cut by heating the heater 60 with respect to the cutter blade 56, the rubber covering the PLY is burned by the heat of the cutter blade 56 as a new problem, and the rubber residue adheres to the cutter blade 56. As a result, a new cutting defect may occur and the life of the cutter blade may be shortened. Furthermore, when the cutter blade 56 is replaced by the heating of the heater 60, the operator may burn his / her hand.

  Then, this invention makes it a subject to provide the cutting | disconnection apparatus and cutting method of the strip | belt-shaped rubber member for tires which can cut | disconnect the strip | belt-shaped rubber member for tires favorably over a long period of time without the possibility of a burn.

The invention described in claim 1
A tire strip rubber member cutting device for transporting a tire strip rubber member produced by coating a topping rubber on a cord and cutting it into a predetermined length,
A cutting support for placing and supporting the belt-like rubber member for tire that has been conveyed;
A cutter blade for cutting in the width direction the belt-like rubber member for tire supported by the support base for cutting;
The front surface of the rubber band member for tire is pressed at a position ahead of the cutter blade in the direction in which the cutter blade moves, and the tension is applied to the tire band rubber member outward in the width direction. With multiple rollers to
While having the cutter blade raising / lowering means for raising and lowering the cutter blade with respect to the cutting support base while holding the cutter blade, the plurality of rollers are held, and the width of the belt-like rubber member for the tire A holding mechanism that moves along the direction,
As the holding mechanism moves, the cutter blade cuts the tire-like rubber member for tire while a plurality of rollers apply tension toward the outer side of the belt-like rubber member for tire in the width direction. It is the cutting apparatus of the strip | belt-shaped rubber member for tires.

The invention described in claim 2
The plurality of rollers are arranged in front of the cutter blade in the direction in which the cutter blade moves, and a pair of oblique rollers and a pair of rollers arranged in order from the front to the rear in the direction in which the cutter blade moves. With parallel rollers,
The pair of the oblique rollers are provided symmetrically on both sides with the cutter blade in between, and the rotation axes thereof are inclined from a direction orthogonal to the moving direction of the cutter blade, and the holding mechanism moves. By applying a tension toward the outside in the width direction to the belt-like rubber member for tire,
The pair of parallel rollers are provided symmetrically on both sides with the cutter blade in between, and their rotation axes are provided orthogonal to the moving direction of the cutter blade, and the holding mechanism moves to move the tire 2. The cutting device for a belt-shaped rubber member for tire according to claim 1, wherein the tension applied to the belt-shaped rubber member is maintained.

The invention according to claim 3
The belt rubber member cutting device for a tire according to claim 2, wherein an angle formed by a rotation axis of the oblique roller and a moving direction of the cutter blade is 10 to 45 °.

The invention according to claim 4
The cutting device for a belt-shaped rubber member for a tire according to any one of claims 1 to 3, wherein the blade of the cutter blade faces upward.

The invention described in claim 5
5. The tire strip rubber member cutting device according to claim 1, wherein a release treatment is applied to a surface of the cutting support base. 6.

The invention described in claim 6
6. The tire strip rubber member cutting device according to claim 5, wherein the release treatment is a release treatment using a surface modifier.

The invention described in claim 7
7. The tire strip rubber member cutting device according to claim 1, wherein an air blow hole is formed on a surface of the cutting support base.

The invention according to claim 8 provides:
8. The cutter blade lifting and lowering means adjusts a position where the cutter blade hits the rubber band member for a tire by adjusting a protrusion amount of the blade edge of the cutter blade. 9. 2. A cutting device for a rubber band member for tire according to item 1.

The invention according to claim 9 is:
A method for cutting a tire strip rubber member, wherein the tire strip rubber member is cut into a predetermined length by using the tire strip rubber member cutting device according to any one of claims 1 to 8. ,
As the holding mechanism moves, the cutter blade cuts the tire-like rubber member for tire while a plurality of rollers apply tension toward the outer side of the belt-like rubber member for tire in the width direction. This is a cutting method for a rubber band member for tire.

The invention according to claim 10 is:
The method for cutting a tire strip rubber member according to claim 9, wherein the tire strip rubber member is cut using the cutter blade at room temperature.

  ADVANTAGE OF THE INVENTION According to this invention, there is no fear of a burn, and the cutting | disconnection apparatus and cutting method of the strip | belt-shaped rubber member for tires which can cut | disconnect the strip | belt-shaped rubber member for tires favorably over a long term can be provided.

It is the schematic diagram which looked at the cutting device of the belt-shaped rubber member for tires concerning one embodiment of the present invention from the side of the cutter blade. It is the schematic diagram which looked at the cutting | disconnection apparatus of the strip | belt-shaped rubber member for tires which concerns on one embodiment of this invention from the advancing direction front of the cutter blade. It is an arrangement drawing of each roller when a spreading roller part is seen from the belt-like rubber member for tires. It is the schematic diagram which looked at the cutting device of the conventional belt-shaped rubber member for tires from the side of the cutter blade. It is the schematic diagram which looked at the cutting device of the conventional strip | belt-shaped rubber member for tires from the advancing direction front of the cutter blade.

  Hereinafter, an embodiment of a cutting device for a rubber band member for tire according to the present invention will be described with reference to the drawings.

1. Background to the Present Invention The present inventor has studied the cause of the cutting of the cutter blade becoming worse as the number of times of cutting increases in a conventional cutting apparatus for a rubber band member for a tire. As a result, in the case of the conventional cutting method, it has been found that the rubber is concentrated on the cutting portion where the cutter blade is pressed and attached to the cutter blade, which is a cause of poor cutting.

  Accordingly, the present inventor considers that the rubber band rubber member for tire can be cut well if the concentration of rubber on the cutting portion can be suppressed, and tension is applied to the rubber outwardly at the time of cutting. This led to the completion of the present invention.

2. Outline of Cutting Device for Tire Band Rubber Member for Tire The cutting device for a belt rubber member for a tire according to the present embodiment is a method in which a belt rubber member for a tire manufactured by covering a cord with a topping rubber is conveyed to a tire molding drum. A cutting support base, a cutter blade, a plurality of rollers, and a holding mechanism that holds the cutter blade and the plurality of rollers and moves in the width direction of the belt-like rubber member for the tire. ing.

  The tire strip rubber member cutting device according to the present embodiment is a conventional tire strip rubber in that the cutter blade cuts the tire strip rubber member mounted on the cutting support base into a predetermined length. This is the same as the member cutting apparatus. However, instead of the conventional presser plate, a plurality of rollers arranged in front of the cutter blade move together with the cutter blade, and the width direction of the tire band rubber member is in front of the cutter blade in the traveling direction. This is different from the conventional cutting device for a belt-shaped rubber member for a tire in that an outward tension is applied.

  Since the concentration of rubber is prevented by the tension toward the outside in the width direction, the cutting edge of the cutter blade does not decrease even if the number of times of cutting increases, and it is not necessary to heat the cutter blade. Can be cut well. As a result, there is no risk of burns, and the belt-like rubber member for tires can be cut well over a long period of time.

3. FIG. 1 is a schematic view of a cutting device for a tire-like rubber member for tire according to the present embodiment as viewed from the side of a cutter blade, and FIG. 2 is a tire-like shape for a tire according to this embodiment. It is the schematic diagram which looked at the cutting device of the rubber member from the advancing direction front of the cutter blade.

  The tire strip rubber member cutting device 1 includes a holding mechanism 2, a spreading roller unit 3, a cutter blade 18, and a cutting support 4, and further includes a first conveyor belt 5 and a second conveyor belt 5. A conveyor belt 6 and a pair of guide rails 10 and 11 are provided.

(1) Holding mechanism The holding mechanism 2 includes a base 12, a cutter blade lifting cylinder 14, a cutter blade holder 16, and a protrusion adjustment mechanism, and is held by the spreading roller unit 3 and the cutter blade 18. It is held by mechanism 2.

  The base 12 is movable left and right along the pair of guide rails 10 and 11. The cutter blade lifting cylinder 14 fixed to the base 12 can lift and lower the cutter blade holder 16 and the cutter blade 18 fixed by the cutter blade holder mounting jig 19 by extending and contracting the rod 15. When the rod 15 is contracted, the cutting edge of the cutter blade 18 stands by at a position above the surface of the PLY. On the contrary, when the rod 15 is extended, the cutting edge of the cutter blade 18 can penetrate from the front surface of the PLY to the back surface.

  The cutter blade holder 16 is formed with an arc-shaped hole 22 for adjusting the cutter blade angle. The cutter blade holder 16 is screwed to any position of the cutter blade angle adjustment hole 22. Can be swung with the screwing position P as a support shaft. A screw 17 is provided behind the cutter blade holder 16 that is the base side of the cutter blade 18, and a knob 13 is provided behind the screw 17. By turning the knob 13, the cutter blade 18 can be inserted and removed together with the cutter blade holder 16 through the screw 17 so that the allowance of the cutter blade 18 can be adjusted (protrusion allowance adjusting mechanism). The position at which the cutter blade 18 abuts against the PLY surface can be adjusted by this allowance adjustment mechanism, and the substantially entire length of the cutter blade 18 can be used.

  Further, the cutter blade 18 is directed upward with respect to the direction in which PLY is cut (the direction of arrow A). However, the cutter blade 18 is not provided with a conventional heating means, and cuts PLY at room temperature.

(2) Spreading roller part FIG. 3 is an arrangement view of each roller when the spreading roller part is viewed from below the belt-like rubber member for tire, and will be described below with reference to FIGS. 1, 2, and 3. To do. The spreading roller unit 3 is provided in front of the cutter blade 18 in the direction in which the cutter blade 18 cuts PLY. That is, in the traveling direction of the cutter blade 18, the spreading roller unit 3 is preceded by a pair of oblique rollers 30 a and 30 b that pushes the PLY rubber member first, and holds the rubber member in a spread state. Parallel rollers 32a and 32b are arranged behind the pair of oblique rollers 30a and 30b and follow. In addition, the spreading roller part 3 presses the belt-like rubber member for tire while rotating by being held by the holding mechanism as described above.

  One oblique roller 30a of the pair of oblique rollers is rotatably attached to the base 12 via an arm 34a. The other oblique roller 30b is similarly attached to the base 12 so as to be rotatable. The angle formed between the rotation shaft 31 of each of the pair of oblique rollers 30a and 30b and the moving direction of the cutter blade 18 is inclined by α. Accordingly, the oblique rollers 30a and 30b are arranged so that the leading side is narrowed and the trailing side is expanded, and between the two axes, the leading side is narrow and the trailing side is wide.

  In addition, it is preferable that angle (alpha) which the rotating shaft of diagonal roller 30a, 30b and the moving direction of a cutter blade make is 10-45 degrees. When the angle α is less than 10 °, the tension toward the outside of the PLY in the width direction is insufficient, and rubber scraps may adhere to the cutter blade 18 when the PLY is cut. On the other hand, when the angle α exceeds 45 °, There is a possibility that the tension toward the outside in the width direction becomes too strong, and the movement of the holding mechanism 2 is braked.

  That is, the pair of oblique rollers 30a and 30b are provided symmetrically on both sides with the cutter blade interposed therebetween, and their rotation axes are inclined from a direction perpendicular to the moving direction of the cutter blade, and the holding mechanism 2 moves. By doing so, it is possible to apply a tension toward the outside in the width direction with respect to PLY. In other words, the pair of oblique rollers 30a and 30b are symmetrical on both sides of the cutter blade, and the distance in the direction orthogonal to the moving direction of the cutter blades between the rotation shafts 31 is from the front in the moving direction of the cutter blade. It is provided so as to narrow toward the rear.

  On the other hand, the pair of parallel rollers 32a and 32b are attached to the base 12 so as to be rotatable in the length direction of the PLY via the arms 36a and 36b, respectively. The directions of the rotation shafts 33 of the pair of parallel rollers 32a and 32b are orthogonal to the traveling direction of the cutter blade 18 (the direction in which the cutter blade 18 cuts PLY) in plan view.

  The pair of parallel rollers 30a and 30b are symmetrically provided on both sides of the cutter blade, the rotation shafts 33 thereof are provided orthogonal to the moving direction of the cutter blade, and the holding mechanism 2 moves, The parallel rollers 30a and 30b press the PLY to maintain the tension applied to the PLY.

  As described above, the pair of oblique rollers 30 a and 30 b and the pair of parallel rollers 32 a and 32 b are in a line-symmetric relationship with respect to the traveling direction of the cutter blade 18.

(3) Cutting support base The cutting support base 4 includes an upstream support base 40 located on the upstream side in the PLY transport direction (length direction) and a downstream support base 41 located on the downstream side. The upstream support base 40 and the downstream support base 41 are each formed in a horizontally long frame shape extending in a direction substantially orthogonal to the PLY transport direction. The upstream support base 40 and the downstream support base 41 are arranged side by side with a gap S therebetween, and the cutter blade 18 is configured to pass through the gap S.

  It is preferable that a release process is performed on the surfaces of the upstream support base 40 and the downstream support base 41 to form a large number of air blow holes 42. Specifically, as the mold release treatment, for example, a mold release treatment by a surface modification treatment (unevenness treatment) using a surface modifier such as tack-free coating (manufactured by Nippon Fuso Techno Coat) is preferable.

(4) 1st conveyor belt The 1st conveyor belt 5 conveys PLY to the cutting device 1 of the strip | belt-shaped rubber member for tires, in order to mount the front end side of PLY on the support base 4 for a cutting | disconnection.

(5) Second conveyor belt The second conveyor belt 6 receives the PLY cut to a predetermined length by the holding mechanism 2 from the support 4 for cutting the belt-like rubber member for tire, and receives the PLY of the belt-like rubber member for tire. It is conveyed from the cutting device 1 to the next process.

4). Cutting Method for Tire Band Rubber Member For Tire A PLY cutting method using the cutting device 1 for a tire band rubber member having the above configuration will be described.

  As shown in FIG. 2, the PLY is placed on the first conveyor belt 5 and conveyed in the PLY length direction until the leading end of the PLY reaches a predetermined position on the cutting support 4.

  The holding mechanism 2 stands by on the upper right side (FIG. 1) of the first conveyor belt 5, and when the cutting position of the PLY is placed on the cutting support base 4, the PLY is in a state where the rod 15 is extended. The cutter blade 18 moves along the guide rails 10 and 11 in the direction in which the cutter blade 18 cuts the PLY (in the direction of the arrow A in FIG. 1, ie, the width direction of the PLY) so that the cutter blade 18 is positioned at the same position.

  By the movement of the holding mechanism 2, the pair of oblique rollers 30 a and 30 b preceding the spreading roller unit 3 in front of the cutter blade 18 spreads the rubber member at a cutting portion substantially in the middle of the two cords of PLY. After applying the tension toward the outer side in the width direction of the PLY, the pair of parallel rollers 32a and 32b in the subsequent line maintain the tension applied to the PLY.

  Next, the cutter blade 18 cuts into the PLY to which the tension toward the outside of the PLY width direction is applied by the spreading roller unit 3, and moves the holding mechanism 2 in the direction of the arrow A shown in FIG. Disconnect. At this time, the cutter blade 18 is in a state where the blade edge penetrates from the front surface of the PLY to the back surface.

  The PLY cut to a predetermined length by the holding mechanism 2 is received from the cutting support 4 by the second conveyor belt 6 and conveyed from the cutting device 1 to the next process.

  Thereafter, the rod 15 of the holding mechanism 2 is contracted, and the holding mechanism 2 is caused to travel in the direction opposite to the direction of the arrow A to return to the original state.

5. Advantages of the present embodiment (1) According to the present embodiment, in the direction in which the cutter blade 18 cuts the PLY, the spreading roller portion 3 that spreads the PLY rubber member in front of the cutter blade 18 is provided. Therefore, the rubber member of the cutting portion is tensioned outward in the PLY width direction by the pair of oblique rollers 30a and 30b, and the rubber is concentrated while maintaining the tension applied to the PLY by the pair of parallel rollers 32a and 32b. Therefore, the cutting of the cutter blade 18 is not reduced without heating the heater, and the PLY can be cut. Furthermore, since the spreading roller unit 3 presses the surface of the PLY before cutting, the conventional presser plate 58 becomes unnecessary, and the cutting work can be facilitated.

(2) Further, since it is not necessary to cut by heating with a heater and it is possible to cut using the cutter blade 18 at room temperature, the rubber covering the PLY is not burned at the time of cutting, and the cutter blade 18 It is difficult for rubber debris to adhere to the surface, and the occurrence of defective cutting can be suppressed from this surface as well. Moreover, power consumption can be reduced by eliminating the heater. Furthermore, when the cutter blade 18 is replaced, there is no risk that the operator may burn his / her hand due to heating of the heater.

(3) Further, by providing the spreading roller unit 3 in front of the cutter blade 18, the spreading roller unit 3 spreads the PLY rubber member even after cutting. Re-adhesion can be prevented, and occurrence of defective cutting due to re-adhesion can be suppressed.

(4) In addition, since the allowance adjustment mechanism of the cutter blade 18 is provided so that the allowance adjustment of the cutter blade 18 can be easily performed, the substantially entire length of the cutter blade 18 can be used, and the cutter Costs can be reduced by extending the life of the blade 18. Specifically, although depending on the length of the cutter blade 18, as an example, the life of the cutter blade 18 can be extended about ten times.

(5) Moreover, it can prevent that PLY adheres to the surface of the cutting support stand 4 by performing the mold release process on the surface of the cutting support stand 4. Further, since the air blow hole 42 is formed on the surface of the cutting support 4, it is possible to prevent PLY from coming into close contact with the cutting support 4 and being caught in the gap S of the cutting support 4.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to said embodiment. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

DESCRIPTION OF SYMBOLS 1,50 Tire band-like rubber member cutting device 2 Holding mechanism 3 Spreading roller parts 4, 52 Cutting support 5 First conveyor belt 6 Second conveyor belt 10, 11 Guide rail 12 Base 13 Knob 14 Elevating and lowering for cutter blade Cylinder 15 Rod 16 Cutter blade holder 17 Screw 18 Cutter blade 19 Cutter blade holder mounting jig 22 Cutter blade angle adjustment holes 30a, 30b Diagonal rollers 31, 33 Rotating shafts 32a, 32b Parallel rollers 34a, 36a, 36b Arm 40 Upstream Support base 41 Downstream support base 42 Air blow hole 54 Cutting support base gap 56 Cutter blade 58 Presser plate 60 Heater A PLY cutting direction S Clearance P Screwing position α Inclination angle of rotation axis of oblique roller

Claims (10)

A tire strip rubber member cutting device for transporting a tire strip rubber member produced by coating a topping rubber on a cord and cutting it into a predetermined length,
A cutting support for placing and supporting the belt-like rubber member for tire that has been conveyed;
A cutter blade for cutting in the width direction the belt-like rubber member for tire supported by the support base for cutting;
The front surface of the rubber band member for tire is pressed at a position ahead of the cutter blade in the direction in which the cutter blade moves, and the tension is applied to the tire band rubber member outward in the width direction. With multiple rollers to
While having the cutter blade raising / lowering means for raising and lowering the cutter blade with respect to the cutting support base while holding the cutter blade, the plurality of rollers are held, and the width of the belt-like rubber member for the tire A holding mechanism that moves along the direction,
As the holding mechanism moves, the cutter blade cuts the tire-like rubber member for tire while a plurality of rollers apply tension toward the outer side of the belt-like rubber member for tire in the width direction. A cutting device for a belt-shaped rubber member for tires. The plurality of rollers are arranged in front of the cutter blade in the direction in which the cutter blade moves, and a pair of oblique rollers and a pair of rollers arranged in order from the front to the rear in the direction in which the cutter blade moves. With parallel rollers,
The pair of the oblique rollers are provided symmetrically on both sides with the cutter blade in between, and the rotation axes thereof are inclined from a direction orthogonal to the moving direction of the cutter blade, and the holding mechanism moves. By applying a tension toward the outside in the width direction to the belt-like rubber member for tire,
The pair of parallel rollers are provided symmetrically on both sides with the cutter blade in between, and their rotation axes are provided orthogonal to the moving direction of the cutter blade, and the holding mechanism moves to move the tire 2. The cutting device for a belt-like rubber member for a tire according to claim 1, wherein a tension applied to the belt-like rubber member is maintained.   The cutting apparatus for a rubber band member for tire according to claim 2, wherein an angle formed by a rotation axis of the oblique roller and a moving direction of the cutter blade is 10 to 45 °.   The cutting device for a belt-shaped rubber member for tire according to any one of claims 1 to 3, wherein a blade of the cutter blade is upward.   5. The cutting device for a belt-like rubber member for a tire according to claim 1, wherein a release treatment is performed on a surface of the support base for cutting. 6.   6. The cutting device for a belt-shaped rubber member for tire according to claim 5, wherein the releasing treatment is a releasing treatment using a surface modifier.   7. The cutting device for a tire-like rubber member according to claim 1, wherein an air blow hole is formed on a surface of the cutting support base. 8.   8. The cutter blade lifting and lowering means adjusts a position where the cutter blade hits the rubber band member for a tire by adjusting a protrusion amount of the blade edge of the cutter blade. 9. The cutting device for a belt-shaped rubber member for tire according to item 1. A method for cutting a tire strip rubber member, wherein the tire strip rubber member is cut into a predetermined length by using the tire strip rubber member cutting device according to any one of claims 1 to 8. ,
As the holding mechanism moves, the cutter blade cuts the tire-like rubber member for tire while a plurality of rollers apply tension toward the outer side of the belt-like rubber member for tire in the width direction. A method for cutting a rubber band member for tire.   The method for cutting a tire strip rubber member according to claim 9, wherein the tire strip rubber member is cut using the cutter blade at room temperature.

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