JPH071319A - Wire bead saw - Google Patents

Abstract

PURPOSE:To prevent a ring-like base from rotating around a wire rope and avoid the wear and abrasion of a resin coated layer due to cutting beads by forming rotation preventive grooves in the internal peripheral surface of the ring-like base and by fixing the internal peripheral surface to the external peripheral surface of the wire rope through the resin coated layer. CONSTITUTION:A wire rope 1 comprises a plurality of metal wires twisted, and the external peripheral surface of the wire rope 1 is coated with a resin coated layer 2. A ring-like base 3 is set around the wire rope 1 and is buried in a resin coated layer 2, and a plurality of rotation preventive grooves 3a is formed in the internal peripheral surface of the ring-like base 3. In addition, cutting beads 4 are formed into cylindrical pipe-like substances respectively by sintering allay powder containing diamond powder 4a and are fixed to the external peripheral surface of the ring-like base 3. A rotation preventing coated resin layer 5 is fixed to the external peripheral surface of the ring-like base 3 on the rear side more than the cutting beads 4 to the direction A in which the cutting beads 4 advance in cutting. This constitution prevents the ring-like base 3 from running idle around the wire rope 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire bead saw for cutting stone materials, concrete structures and the like.
More specifically, the present invention relates to a wire bead saw in which a plurality of cutting beads are externally fixed at intervals in the longitudinal direction of the wire rope.

[0002]

2. Description of the Related Art A typical example of a conventional wire bead saw is described in Japanese Patent Publication No. 4-64804. That is, as shown in FIG. 5, it has a metal rope 51, a thin projection 53 which is externally inserted on the rope at a predetermined interval and protrudes from the inner peripheral edge to both axial ends, and a diamond coating 57 is provided on the outer periphery. Beads 52
And a flexible covering 55 that is integrally formed to surround the outer circumference of the rope, and the flexible covering 55 is interposed between adjacent beads to form a spacer for beads 56. And an annular layer 54 interposed between the beads and the rope
Are integrally molded in a continuous tube shape with the same outer diameter, and the beads 52 are fixed to the rope 51 via the covering body 55.

[0003]

The use of the conventional wire bead saw causes the beads 52 to spin around the annular layer 54. When such a wire bead saw is further used, the beads cause the end of the coating body on the side opposite to the running direction of the wire rope to be worn at the end of the bead together with cutting waste such as stone material. In particular, if the beads have sharp edges, they further wear. As a result, the metal rope 51 was exposed and was often broken at this portion.

An object of the present invention is to provide a wire bead saw that ameliorates the above-mentioned drawbacks of the prior art.

[0005]

According to the present invention, a wire rope, a resin coating layer, a plurality of tubular bases externally inserted into the wire rope and embedded in the resin coating layer, and the tubular base. The above-mentioned object is achieved by a wire bead saw fixed to the outer circumference of the tubular base, the tubular base having an anti-rotation groove on its inner peripheral surface and being fixed to the wire rope through a resin coating layer. can do.

The anti-rotation groove is preferably a groove which is substantially parallel to the tube axis direction of the tubular base or is skewed or corrugated.

The tubular base is preferably 2 to 2.5 times as long as the cutting beads in the axial direction of the tube.

When the length of the cutting beads in the axial direction of the tubular base tube is L, the cutting beads are preferably provided at a distance of 1/2 L or less from the end surface of the tubular base on the cutting beads traveling direction side during cutting. The tubular base has a length in the axial direction of the tube of at least 2 L or more.

[0009]

EXAMPLE A wire rope having sufficient strength and flexibility to cut stones and the like is used. Usually, a wire formed by twisting a plurality of metal wires is used, but a single wire may be used. As the material of the wire rope, for example, stainless steel or steel can be used.

The resin coating layer coats the wire rope and the tubular base, and is formed of a resin having abrasion resistance, flexibility and elasticity. For example, rubber or urethane resin can be used.

The tubular base is to be inserted onto the wire and embedded in the resin coating layer, and is usually made of a metal that does not easily deform.

The inner peripheral surface of the tubular base has an anti-rotation groove. The rotation prevention groove may have any shape as long as it can prevent the tubular base from spinning around, and is preferably a groove having a main axis of the groove in a direction substantially parallel to the tube axis direction of the tubular base. For example, the groove is formed so as to be substantially parallel to the tube axis direction of the tubular base or oblique or wavy. The oblique or corrugated groove has an intersection angle between the central axis (main axis of the groove) of the traveling direction and the tubular base tube axis of 7
It should be 0 ° or less (preferably 30 to 45 °). The number of grooves in the case of forming the rotation-preventing grooves substantially parallel to the tube axis direction of the tubular base (including skew) can be, for example, about 10 to 30. Moreover, the area of the groove is preferably 50 to 7 with respect to the area of the inner peripheral surface of the tubular base (when there is no groove).
Set at 0%. The cross section of the groove in the direction perpendicular to the tube axis of the tubular base may be a polygon such as a quadrangle.

The outer peripheral cross section of the tubular base in a direction perpendicular to the tube axis of the tubular base is preferably circular.

The cutting beads are fixed to the outer peripheral surface of the tubular base by, for example, brazing or electrodeposition and project outward from the coating layer (outward in the radial direction of the wire rope). It is for cutting a cut object. The shape of the cutting beads is preferably a continuous ring in the outer peripheral direction of the tubular base. Cutting beads
The cutting beads may contain hard particles (abrasive grains) as a whole, or the cutting beads may have hard particles contained in the outermost peripheral surface layer portion. The hard particles of the cutting beads can be bound by a binder such as resin, metal or ceramic. As the hard particles (abrasive particles), for example, particles of diamond, cubic silicon nitride, silicon carbide, tungsten carbide, boron carbide or the like can be used. The preferred cutting beads are of a sintered alloy containing diamond powder.

The cutting beads are usually joined to the tubular base by, for example, brazing or electrodeposition, but they are formed as a continuous integrated product or the inner circumference of the cutting beads which is a part of the tubular base and the cutting beads. The part may be integrally formed, and the surface layer part of the cutting beads containing hard particles may be formed on the outer periphery of the inner peripheral part.

An example of the wire bead saw of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a wire rope of an example of the wire bead saw of the present invention. FIG. 2 is a perspective view showing an axial cross section of the tubular base and the cutting beads fixed to the outer circumference of the tubular base. FIG. 3 is a cross-sectional view of the cutting beads of the wire bead saw of the present invention in a direction perpendicular to the longitudinal direction of the wire rope. First, a description will be given based on these FIGS.

The wire rope 1 is formed by twisting a plurality of metal wires, and is covered with a resin coating layer 2. The tubular base 3 is externally inserted into the wire rope 1 and embedded in the coating layer 2. As shown in FIG. 3, the tubular base 3 has a circular outer peripheral cross section, which is perpendicular to the axial direction of the tubular base 3 (the direction parallel to the arrow A). The inner peripheral surface of the tubular base 3 has a plurality of anti-rotation grooves 3a that are parallel or oblique to the tube axis direction, and the tubular base 3 has a wire rope with a coating layer surrounded by the inner peripheral surface of the tubular base. Since it is fixed to the wire rope, it can be prevented from turning around in the circumferential direction of the wire rope.

The cutting beads 4 are beads in the shape of a cylindrical tube (ring) obtained by sintering an alloy powder containing the diamond powder 4a. The cutting beads 4 are fixed to the outer periphery of the tubular base 3 by brazing or electrodeposition, and the outermost peripheral surface of the cutting beads is projected from the surface of the coating layer in the radial direction of the wire rope (in the direction of arrow B). I am letting you.

The rotation preventing resin coating layer portion 5 is fixedly provided on the outer periphery of the tubular base 3 on the rear side of the cutting beads 4 with respect to the traveling direction of the cutting beads 4 (the direction indicated by the arrow A) during cutting. There is. The rotation preventing resin coating layer portion 5 has a cylindrical ring shape having the same diameter as the cutting beads 4. Anti-rotation resin coating layer 5
The material is the same resin as the coating layer 2, and is provided continuously and integrally with the coating layer 2. Anti-rotation resin coating layer 5
The part where the end face of the cutting bead and the end face of the cutting bead 4 contact each other is fixed to each other.

The length of the cutting beads 4 in the axial direction of the tubular base tube is indicated by L and can be, for example, about 6.5 to 10 mm. The length of the rotation preventing resin coating layer portion 5 in the axial direction of the tubular base tube is M.
And can be, for example, about 6.5 to 10 mm. The length M in FIG. 1 is the same as the length L, but in addition to this, it can be ½ L or more.

The cutting beads 4 are provided at a distance N from the end surface of the tubular base on the advancing direction side (direction indicated by the arrow A) of the cutting beads 4 during cutting. That is, the distance between the end surface of the tubular base and the end surface of the cutting beads on the advancing direction side of the cutting beads is N. The distance N is 1/2 or less of the length L of the cutting beads in the axial direction of the tubular base tube.

The distance P between the rear ends of the tubular bases and the tips of the other tubular bases in the advancing direction of the wire ropes of adjacent tubular bases is set to a length that does not hinder the bending of the wire during cutting. For example, it can be within 16 to 50 mm.

The outer diameter of the resin coating layer portion 2 is preferably smaller than the outer diameter of the cutting beads 4 by 0.5 mm or more.

Further, as shown in FIG. 4, the outer diameter Q of the rotation preventing resin coating layer portion is equal to or less than the outer diameter of the cutting beads.

The wire bead saw of the present invention is usually
The endless wire rope is mostly used, but even if it is not, as shown in FIG. 4, the end portion and the end portion are reconnected by a cylindrical tubular connecting copper pipe 41 and used as an endless ring as shown in FIG. be able to.

In the illustrated wire bead saw, a tubular base 3 having cutting beads 4 fixed on the outer periphery is externally inserted at a predetermined distance from the wire rope 1 in a mold having a predetermined length, and The process of filling the space portion of the mold with the molten resin and cooling it can be repeated in the longitudinal direction of the wire rope.

[0028]

The wire bead saw of the present invention comprises a wire rope, a resin coating layer, a plurality of tubular bases externally inserted into the wire rope and embedded in the resin coating layer, and an outer periphery of the tubular base. The tubular base has a rotation-preventing groove on its inner peripheral surface and is fixed to the wire rope through a resin coating layer. Can be prevented from spinning around. Therefore,
It is possible to prevent the cutting beads from abrading the resin coating layer, exposing the wire rope, and breaking the wire rope at that portion.

The rotation preventing resin coating layer portion of the cutting beads having a diameter larger than the diameter of the resin coating layer and smaller than the diameter of the cutting beads and fixed to the cutting beads is cut in the traveling direction of the cutting beads during cutting. When the tubular base is provided on the outer periphery of the tubular base behind the beads, it is possible to more effectively prevent the tubular base from spinning around the wire rope.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a wire rope of an example of a wire bead saw of the present invention.

FIG. 2 is a partial cross-sectional perspective view showing the tubular base in the axial direction and the tubular base of the cutting beads fixed to the outer periphery of the tubular base in the present invention.

FIG. 3 is a cross-sectional view of cutting beads in the direction perpendicular to the longitudinal direction of the wire rope of the wire bead saw of the present invention.

FIG. 4 is a longitudinal cross-sectional view of a wire rope of an example of the wire bead saw of the present invention in which the ends are joined to form a ring.

FIG. 5 is a longitudinal sectional view of a conventional wire bead saw.

[Explanation of symbols]

 1 ... Wire rope 2 ... Resin coating layer 3 ... Tubular base 3a ... Rotation prevention groove 4 ... Diamond cutting beads 5 ... Rotation prevention resin coating layer

Claims (4)

[Claims] 1. A wire rope, a resin coating layer, a plurality of tubular bases externally inserted into the wire rope and embedded in the resin coating layer, and cutting beads fixed to the outer periphery of the tubular base. The wire bead saw, wherein the tubular base has an anti-rotation groove on its inner peripheral surface and is fixed to a wire rope through a resin coating layer. 2. The wire bead saw according to claim 1, wherein the anti-rotation groove is a groove which is substantially parallel to the tube axis direction of the tubular base or is oblique or corrugated. 3. The wire bead saw according to claim 1, wherein the tubular base is 2 to 2.5 times as long as the cutting beads in the tube axis direction. 4. The length of the cutting beads in the axial direction of the tubular base tube is L, and the cutting beads are provided at a distance of ½ L or less from the end surface of the tubular base on the cutting beads traveling direction side during cutting. The wire base saw according to claim 1, wherein the tubular base has a length in the tube axis direction of at least 2 L or more.