JP2010046729A - Cutting tool for sheet material containing steel cord - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handy cutting tool for a sheet material containing a steel cord capable of surely cutting along the steel cord without damaging a rubber material coated on the steel cord. <P>SOLUTION: The cutting tool includes a first arm 4 having a rotatable cylindrical rotary roller 2 at the tip and a grip 3a at the base end, and a second arm 6 having a rotatable circular blade 5 at the tip and a grip 3b at the base end. The sheet material W having a plurality of arranged steel cords K formed as a sheet by rolling and coating with a rubber material R during a rolling step is pinched between the rotary roller 2 and the circular blade 5 to be cut by pushing or pulling, thereby cutting the rubber material R between the steel cords K. The rotary roller 2 is structured to be slidable laterally from a spindle 8 supported by a supporting bracket 7 and is structured to be axially movable by interposing a spring or the like on the spindle 8 between a terminal of the rotary roller 2 and a side face of the supporting bracket 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cutting tool for steel cord-containing sheet material, and more particularly, when cutting a sheet material made of a rubber-like elastic material roll-coated with a plurality of aligned steel cords along the steel cord. The present invention relates to a cutting tool for steel cord-containing sheet material that can efficiently and reliably cut a rubber material between steel cords without exposing the steel cord.

  Conventionally, sheet materials containing steel cords such as carcass materials and breaker materials used as reinforcing materials for rubber-like products, such as tires, are formed by rolling a plurality of aligned steel cords with a rubber material in a rolling process. A sheet material is manufactured, and the sheet material is cut and used as necessary.

  When cutting a steel cord-containing sheet material into a required length or width, a device that cuts the sheet material while moving the cutter along the steel cord from the terminal portion of the sheet material during the sheet material conveyance process (for example, Patent Document 1) And a method of cutting the sheet material by cutting it into two in the center of the width direction of the sheet material and tearing it to the left and right along the steel cord. Patent Document 2), and a method in which a heated cutter or the like is pressed against a steel cord-containing sheet material and cut manually.

  However, in the conventional methods as described above, particularly by manual cutting, when the rubber material between the steel cords is cut along the steel cord, it is cut along one of the wires of the steel cord. Therefore, the rubber material coated on the steel cord is scraped off and the wire of the steel cord may be exposed.

Such exposure of the wire is not preferable in terms of product quality, and the conventional cutting apparatus has a large size and high equipment cost, and there is a problem that it is difficult to perform a manual cutting operation.
JP-A-2-219632 Japanese Patent Laid-Open No. 11-77584

  This invention pays attention to such a conventional problem, and provides a handy type steel cord-containing sheet material cutting tool capable of reliably cutting along the steel cord without damaging the rubber material coated on the steel cord. It is intended to provide.

  In order to achieve the above object, the present invention provides a cylindrical rotating roller that can be rotated at the distal end, a first arm that has a gripping portion at the proximal end, and a round blade that can be rotated at the distal end. The first arm and the second arm are crossed so that the surface of the rotating roller and the round blade are opposed to each other, and the crossing part is interposed via a support pin. The gist is that they are rotatably connected.

  Here, between the first arm and the second arm, a detachable elastic member for biasing in a direction in which the round blade and the rotating roller always approach each other is interposed, or provided at the tip of the first arm. It is also possible to configure the rotating roller to be movable in the axial direction.

  When the distance from the center of the support pin to the rotation center of the round blade is La and the distance from the center of the support pin to the rotation center of the rotary roller is Lb, the distance is set to La ≦ Lb, and the round The blade is configured to be replaceable with a round blade having an arbitrary thickness corresponding to the pitch in the parallel direction of the steel cord and the thickness of the sheet material.

  As described above, the present invention is provided with a cylindrical rotating roller that can be rotated at the distal end, a first arm that is provided with a gripping portion at the base end portion, and a round blade that can be rotated at the distal end, and is gripped at the base end portion. The first arm and the second arm intersect each other so that the surface of the rotating roller and the round blade face each other, and the intersecting portion can be rotated via a support pin. Since it is connected to the steel cord, it can be cut reliably along the steel cord without scraping off the rubber material coated on the steel cord, and it can be used as a cutting tool for sheet material containing handy steel cord. effective.

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

  1 is an overall perspective view of a steel cord-containing sheet material cutting tool embodying the present invention, FIG. 2 is a side view of the cutting tool, FIG. 3 is an enlarged front view of a round blade of the cutting tool, and FIG. The cutting tool 1 which concerns on this AA arrow sectional view is shown, and as shown in FIGS. 1-4, the cylindrical rotation roller 2 which can be rotated is provided in the front-end | tip, and the holding part 3a is provided in the base end part. A plurality of aligned steel cords K are rolled. The first arm 4 is provided with the first arm 4 and the second arm 6 is provided with the rotatable round blade 5 at the distal end and the gripping portion 3b at the proximal end. In the process, the sheet material W rolled and coated with the rubber material R is sandwiched between the rotating roller 2 and the round blade 5 and pressed (long distance cut) or drawn (short distance cut). The rubber material R between the cords K is cut.

  The rotating roller 2 is formed into a cylindrical shape having a length of 40 mm to 80 mm and a diameter of φ10 mm to 30 mm by a material S45C or the like. The rotating roller 2 can be rotated by a support bracket 7 having a concave cross section through a support shaft 8. The central bottom surface in the longitudinal direction of the support bracket 7 is supported and is attached to the tip of the first arm 4 via a fixing bolt 7a.

  The rotating roller 2 is configured to be slidable in the left-right direction with respect to the support shaft 8 supported by the support bracket 7, specifically, between the end portion of the rotating roller 2 and the side surface of the support bracket 7. The support shaft 8 is configured to be movable in the axial direction by interposing a spring or the like.

  Further, as shown in FIG. 3, the round blade 5 is formed in a disk shape having a thickness W of 1.0 mm to 2.5 mm and a diameter of 40 mm to 80 mm by a material SKH51 or the like. Depending on the pitch of the steel and the diameter of the steel cord K, generally 10 to 45 degrees are preferable. In addition, it is desirable to use a material whose hardness of the round blade 5 is higher than that of the rotating roller 2.

  The round blade 5 is rotatably supported by a bracket 9 having a U-shaped cross section via a support shaft 10, and the back surface of the bracket 9 is integrally fixed to the tip of the second arm 6 by welding or the like. . The round blade 5 is configured to be replaceable with a round blade 5 having an arbitrary thickness W corresponding to the pitch of the steel cord K in the parallel direction.

  Then, the first arm 4 and the second arm 6 are crossed so that the surface of the rotating roller 2 and the round blade 5 face each other, and the crossing portion X is rotatably connected via the support pin 11. It is.

  Also, an elastic member 12 such as a coil spring that urges the round blade 5 and the rotating roller 2 in a direction in which the round blade 5 and the rotating roller 2 always approach is attached / detached inside the gripping portions 3a and 3b of the first arm 4 and the second arm 6. The elastic member 12 is configured to be able to set the strength of the elastic force according to the thickness of the sheet material W to be cut, the hardness of the rubber material R, and the like.

  Further, when the distance from the center of the support pin 11 to the rotation center 5a of the round blade 5 is La and the distance from the center of the support pin 11 to the rotation center 2a of the rotary roller 2 is Lb, the distance is La ≦ Lb. By setting, when the sheet material W is sandwiched between the rotating roller 2 and the round blade 5 and cut (long distance cut) or pulled (short distance cut), the sheet material W is cut in a stable state. Is something you can do.

  Next, a method of using the cutting tool when cutting the steel cord-containing sheet material having the above-described configuration will be described.

  The steel cord-containing sheet material is obtained by rolling and coating a plurality of steel cords K arranged as described above with a rubber material R in a rolling process to form a sheet material W having a predetermined thickness. The side edges of W are covered with a thin rubber sheet material called ear rubber in order to prevent the steel cord K from being scattered or the end portion of the steel cord K being exposed.

  When cutting such a sheet material W, the rubber material R between the steel cord K at a predetermined position from the end of the sheet material W is interposed between the rotating roller 2 and the round blade 5 as shown in FIG. Sandwich. In other words, the gripping portions 3a and 3b of the first arm 4 and the second arm 6 are held with one hand against the elastic force of the elastic member 12 urged in the direction in which the round blade 5 and the rotating roller 2 always approach each other. The rubber material R between the steel cord K at a predetermined position from the end portion of the sheet material W is sandwiched between the rotary roller 2 and the round blade 5 while being pressed inward and the round blade 5 and the rotary roller 2 are pushed open. By loosening the gripping force in this state, the rubber material R between the steel cords K is sandwiched between the rotating roller 2 and the round blade 5 by the elastic force of the elastic member 12.

  Then, the sheet material W is cut toward a predetermined position from the terminal portion of the sheet material W, that is, in a state where the thick portion where the ear rubber is laminated is sandwiched between the rotating roller 2 and the round blade 5 ( When the cutting work of the terminal portion of the sheet material W is completed, the cutting tool 1 is then pushed toward the cutting direction of the sheet material W. While pushing.

  At the time of this cut-off cutting, the rubber material R between the steel cords K is firmly held between the rotating roller 2 and the round blade 5 by the elastic force of the elastic member 12 and the center between the steel cords K is elastically applied by the elastic member 12. Since the rubber material R of the part can be cut along the steel cord K, the rubber material R covering the steel cord K is scraped off and the steel cord K is not exposed, so that the cutting work is always performed in a stable state. It can be done easily by hand.

  The clamping force and cutting force of the rubber material R can be arbitrarily adjusted by exchanging the round blade 5 or exchanging the elastic member 12, and further from the center of the support pin 11 to the rotation center 5a of the round blade 5. By setting the distance La and the distance from the center of the support pin 11 to the rotation center 2a of the rotation roller 2 to L ≦ Lb, the sheet material W is sandwiched between the rotation roller 2 and the round blade 5. When pushing (cutting a long distance) or pulling (cutting a short distance), the cutting can be performed in a stable state.

It is a whole perspective view of the cutting tool of the sheet material containing steel cord which implemented this invention. It is a side view of a cutting tool. It is an enlarged front view of the round blade of a cutting tool. It is AA arrow sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Rotating roller, 2a Rotation center 3a, 3b Holding part 4 1st arm 5 Round blade 5a Rotation center 6 2nd arm 7 Support bracket 7a Fixing bolt 8 Support shaft 9 Bracket 10 Support shaft 11 Support pin 12 Elastic member K Steel cord R Rubber material W Sheet material X Intersection

Claims (5)

  A first rotating arm provided with a cylindrical rotating roller at the distal end and a gripping portion provided at the proximal end; a second arm provided with a rotatable round blade at the distal end and provided with a gripping portion at the proximal end; The first arm and the second arm intersect each other so that the surface of the rotating roller and the round blade face each other, and the intersecting portion is rotatably connected via a support pin. Cutting tool for sheet material with steel cord.   The cutting | disconnection of the sheet | seat material containing a steel cord of Claim 1 which interposed the detachable elastic member which urges | biases in the direction in which a round blade and a rotation roller always approach between the said 1st arm and the 2nd arm. tool.   The cutting tool for steel cord-containing sheet material according to claim 1 or 2, wherein a rotating roller provided at a tip of the first arm is configured to be movable in an axial direction.   The distance is set such that La ≦ Lb, where La is the distance from the center of the support pin to the rotation center of the round blade and Lb is the distance from the center of the support pin to the rotation center of the rotating roller. Or the cutting tool of the sheet material containing a steel cord of 3.   The steel blade according to claim 1, 2, 3 or 4, wherein the round blade is configured to be replaceable with a round blade of any thickness corresponding to the pitch in the parallel direction of the steel cord and the thickness of the sheet material. Cutting tool for sheet material.

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