JP2002166371A - Grinding rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding rope allowing the judgment of replacement time by identifying the wear state of an edge body without interrupting a working operation. SOLUTION: A spiral edge body 30 having an edge body unit 20 with abrasive grains W for cutting fixed thereto on the side facing toward the outside is installed on a metallic rope 10 by winding, a rope covering member 40 of double layer structure formed of an inner layer 2 formed on the rope 10 side and an outer layer 42 formed on the outside of the inner layer 41 is formed in a spiral clearance in the blade body 30. The colors of the inner layer 41 and the outer layer 42 are differentiated from each other, and the inner layer 41 is formed radially with a specified thickness (d) in the area ranging from the outer peripheral surface 10a of the rope 10 to the position H of the edge body unit 20 where the abrasive grains W are fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding rope which is wound around a work, such as a structure made of concrete or asphalt, and is circulated by a plurality of pulleys to process the work.

[0002]

2. Description of the Related Art Conventionally, when a concrete or asphalt-made building such as a building or a bridge is cut to reinforce or remove it, a flexible wire such as a metal rope is used. Wire saws in which bead-shaped blades obtained by sintering abrasive grains are arranged at predetermined intervals have been used. More specifically, the wire saw is inserted into a through hole formed in the work, and further, the wire saw is wound around the work, and then the wire saw is connected to a plurality of pulleys according to the installation location. While hanging it around the drive pulley and applying appropriate tension to the wire saw,
A wire saw has been driven by a driving pulley to cut and cut a workpiece. FIG. 2 shows an example of a cutting process of a workpiece using such a wire saw. For example, the wire saw B is wound around the work C, wound around the pulleys 600 and 600, led to the drive pulley 700, and connected endlessly.
The wire saw B is driven by rotating the wire saw 0. Thus, the work C is cut and cut by the wire saw B. Note that the driving pulley 700 is
It is assumed that the wire saw B moves on the table 800 away from the work C together with 0, so that a constant tension is always applied to the wire saw B when performing the cutting process, and the wire saw B is always bitten into the cutting surface. I am trying to cut it.

When a workpiece is cut using a wire saw having the above-described configuration, the workpiece is cut off intermittently by blades arranged at predetermined intervals, so that cutting resistance increases. Since the noise increases, the spiral blade is attached to a flexible wire such as a metal rope, and the pitch of the blades is made smaller than the interval between the bead-shaped blades, so that the blade is continuously covered. Attempts have been made to cut and machine a workpiece. Hereinafter, a wire in which a helical blade is attached to a flexible wire will be referred to as a grinding rope. FIGS. 3 and 4 show an example of a grinding rope having such a configuration. In the figure, a grinding rope 900 is a flexible metal rope 100 made of carbon steel, stainless steel, or the like.
And a blade body 300 which is attached so as to be wound over the entire length of the rope 100 and has ultra-hard abrasive grains W such as diamond fixed to the side facing the outside of the spiral blade body 200 by brazing or the like. And Further, in the spiral gap of the blade body 300, for example, a rope covering member 40 made of natural rubber mixed with carbon for improving abrasion resistance is used.
Numeral 0 is formed by injection molding or the like, and is configured to maintain the spiral pitch of the blade body 300 and protect the rope 100 from breakage during processing of the workpiece.

[0004]

However, when the work of machining a workpiece is performed using the grinding rope having the above-described structure, even if the blade body is worn and the side to which the abrasive grains are fixed is worn. Since there is no means for identifying the wire rod, the working operation may be continued until the wire is broken. When the wire is broken, the wire causes a high-speed whipping motion, which could lead to a fatal accident, and there was a problem in terms of safety. So far, in order to prevent wire breakage and ensure safety, temporarily suspend machining work and check the wear condition of the blade, determine an appropriate replacement time, or have no significant wear Since there was no choice but to replace it with a new grinding rope at an early stage, there was a problem that the workability was reduced and the cost was inevitably increased. Further, when the wire coating member is formed by injection molding, there is also a disadvantage that the pitch of the blade body is changed by being pushed by the flowing wire coating member. Blades tend to wear faster in areas where the pitch is large, and if this part wears out first, the grinding rope must be replaced, even though other parts are not yet completely worn out. This has led to the problem of increased costs.

The present invention has been made in view of the above circumstances, and provides a grinding rope capable of identifying a worn state of a blade body and judging a replacement time without interrupting a machining operation. It is in. Another object is to provide a grinding rope that can make the pitch of the blade bodies uniform.

[0006]

According to a first aspect of the present invention, there is provided a wire rod having a flexible wire, and abrasive grains for grinding fixed to a side facing the outside of a spiral blade body. A grinding blade comprising a spiral blade body mounted to be wound around the wire over the entire length of the wire, and a wire rod covering member formed in a spiral gap of the blade body, wherein the wire rod covering member Has a two-layer structure, and comprises an inner layer formed on the wire side and an outer layer formed outside the inner layer.

In the present invention, the wire covering member formed in the spiral gap of the blade body is formed to have a two-layer structure, and has an inner layer formed on the wire side and an outer layer formed on the outer side of the inner layer. And an outer layer. Thereby, the use of the grinding rope can be diversified by using different materials for the inner layer and the outer layer, and the convenience can be enhanced.

According to a second aspect of the present invention, in the grinding rope according to the first aspect, the inner layer and the outer layer have different colors, and the inner layer has
It is characterized in that it is formed with a predetermined thickness in the radial direction from the outer peripheral surface of the wire to a position where the abrasive grains of the blade body are fixed.

With such a configuration, the wear of the blade body progresses with the progress of the machining operation, and when the side of the blade body to which the abrasive grains are fixed is worn, the outer layer of the wire coating member is also worn, The inner layer of the wire coating member formed with a predetermined thickness in the radial direction to the position where the abrasive grains for grinding of the blade body are fixed appears. At this time, since the inner layer and the outer layer have different colors, when the blade body is worn, a change in the color of the grinding rope appears during the machining operation. Since this color change can be recognized even when the grinding rope is driven, without interrupting the processing operation,
The change in the color of the grinding rope makes it possible to identify the state of wear of the blade body and determine the time to replace the grinding rope.

According to a third aspect of the present invention, in the grinding rope according to any one of the first and second aspects, the inner layer is formed so that the inner layer is screwed into a helical gap of the blade body. And is formed so as to extend spirally with a width of, and to maintain the pitch of the blade body.

With this configuration, the inner layer of the wire covering member is screwed into the gap between the spiral blades to maintain the pitch of the blades. As the outer layer of the wire-coated member, for example, natural rubber mixed with carbon is used to improve abrasion resistance, and when the wire-coated member is formed by injection molding, the blade is pressed so that the pitch does not change. The inner layer of the wire covering member supports the blade body. Thus, the pitch of the blades can be made uniform. Further, at the time of machining the work, the pitch of the blades can be kept more uniform as compared with a case where the work does not have a two-layer structure.

According to a fourth aspect of the present invention, in the grinding rope according to any one of the first to third aspects, the inner layer is made of a resin.

[0013] With this configuration, the color of the inner layer of the wire covering member can be easily changed. In addition, the inner layer has sufficient rigidity against shrinkage in the direction along the wire, and can maintain the pitch of the blade uniformly, and the inner layer has sufficient flexibility for bending to be machined. It is possible to keep the curvature when winding around an object or around a pulley small.

According to a fifth aspect of the present invention, in the grinding rope according to any one of the first to third aspects, the inner layer is made of a metal.

With this configuration, even when processing a hard work material, the blade has a sufficient rigidity against shrinkage in the direction along the wire and can maintain a uniform pitch of the blade body. At the same time, the wire can be reinforced.

According to a sixth aspect of the present invention, in the grinding rope according to the fifth aspect, the metal is copper.

With this configuration, even when processing a hard work material, the blade has a sufficient rigidity against shrinkage in the direction along the wire and can maintain a uniform pitch of the blade body. At the same time, the wire can be reinforced. Then, the wear state of the blade body can be easily identified based on the color of the copper, and the replacement time of the grinding rope can be determined. Furthermore, since it is easy to be deformed, it is excellent when performing a machining operation with a small curvature of the grinding rope.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A grinding rope according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a grinding rope according to the present invention. In the figure, a grinding rope A is provided with a flexible metal rope 10 made of carbon steel, stainless steel, or the like, and a spiral blade body 20 which is mounted so as to be wound over the entire length of the rope 10. Ultrahard abrasive grains W (grinding abrasive grains) such as diamond are brazed on the substantially half side (the part of the blade body 20 substantially outside the position shown by the dashed-dotted line H in the figure) facing the outside. And a blade body 30 fixed by the above. The blade body 30
It has a length of about 1 m as a single unit, and is attached to the rope 10 at the time of attachment to the rope 10, and the adjacent blade bodies 30 are combined by point welding or one turn at the ends. It is attached so as to be integrated.
Here, the outer diameter of the rope 10 is about 4.8 mm, the diameter of the blade body 20 is about 1.1 mm, and the pitch of the spiral is about 3 mm.

A rope covering member 40 (a wire covering member) is formed in the spiral gap of the blade body 30 to maintain the spiral pitch of the blade body 30 when machining a workpiece. It is configured to protect the rope 10 from breakage. The rope covering member 40 has a two-layer structure, and includes an inner layer 41 formed on the rope 10 side and an outer layer 42 formed outside the inner layer 41. The inner layer 41 is made of resin and has a thickness d in the radial direction from the outer peripheral surface 10a of the rope 10 to the position H where the abrasive grains W of the blade body 20 are fixed. In the present embodiment, the thickness d is approximately half the diameter of the blade body 20. Further, the inner layer 41 is formed to extend spirally with the width D of the gap so as to be screwed into the spiral gap of the blade body 30 and formed so as to uniformly maintain the pitch of the blade body 30. Have been. That is, the spiral inner layer 41 formed in advance by injection molding or the like is screwed into the blade body 30 having a total length of about 1 m to be integrated with the blade body 30,
Together with the rope 10, the rope 1
0 is formed on the outer peripheral surface. The outer layer 42 is, for example,
It is made of natural rubber mixed with carbon for improving abrasion resistance, and is formed by injection molding so as to fill the spiral gap of the blade body 20. Here, the color of the outer layer 42 is black, and the color of the inner layer 41 is different from the color of the outer layer 42 such as white or red.

The grinding rope A shown in FIG.
In the above, when the outer layer 42 of the rope covering member 40 is formed by injection molding, the inner layer 41 supports the blade body 30 so that the pitch is not changed by pushing the blade body 30,
The pitch interval of 0 is kept uniform. Also, when machining a work piece, compared to a case without a two-layer structure,
The pitch of the blade body 30 is supported by the inner layer 41, and is kept more uniform. The inner layer 41 also has sufficient flexibility for bending, so that the curvature of the grinding rope A when it is wound around a workpiece or around a pulley is kept small. Then, as the machining operation progresses, the blade 30
When the side of the blade body 30 to which the abrasive grains W are fixed wears, the outer layer 42 of the rope covering member 40 is similarly worn and formed up to the position H where the abrasive grains W of the blade body 20 are fixed. The inner layer 41 appears. At this time, the inner layer 41 and the outer layer 42
Are different colors from each other, and when the blade body 30 is worn, a change in the color of the grinding rope A appears during the processing operation. This color change is caused by the grinding rope A
Can be recognized even in the state in which the grinding rope A is driven, so that the change of the color of the grinding rope A can be used to identify the abrasion state of the blade body and to determine the replacement time of the grinding rope A without interrupting the machining operation. be able to.

As described above, according to the present embodiment, the pitch of the blade 30 can be made uniform, and the grinding rope A can be replaced by identifying the worn state of the blade without interrupting the machining operation. The time can be determined.

In the above embodiment, the inner layer 41 is
Although it is formed in advance in a spiral shape and formed so as to be screwed to the blade body 30, it may be formed by winding it around a spiral gap of the blade body 30 like a tape. If rubber or vinyl is used for the inner layer 41, the cost can be reduced,
It is also easy to manufacture.

The material used for the inner layer 41 may be metal instead of resin. Thereby, the blade body 30
Can be made more uniform, and it can also be used to reinforce the rope 10 when processing a hard work. In particular, when copper is used as the metal, the color is reddish, which is not only convenient for quickly identifying the wear of the blade 30 but also easy to deform, so that the curvature of the grinding rope A is reduced. Excellent when performing machining operations.

[0025]

The present invention has the following effects. According to the invention described in claim 1, a blade body having abrasive grains fixed to the side facing the outside of the spiral blade body is mounted over the entire length of the flexible wire rod, Since the wire covering member formed in the spiral gap of the blade has a two-layer structure, and is composed of an inner layer formed on the wire side and an outer layer formed outside the inner layer, grinding is performed. The use of rope can be diversified,
The convenience can be improved.

According to the second aspect of the present invention, the inner layer and the outer layer have different colors, and the inner layer has abrasive grains for grinding the blade body fixed from the outer peripheral surface of the wire. Since it is formed with a predetermined thickness in the radial direction to the position,
It is possible to identify the wear state of the blade body without interrupting the machining operation and determine the replacement time of the grinding rope.

According to the third aspect of the present invention, the inner layer is formed to extend spirally with the width of the gap so as to be screwed into the spiral gap of the blade body. The pitch of the blades can be made uniform.

According to the fourth aspect of the present invention, since the inner layer is made of resin, the color of the inner layer can be easily changed. Further, the pitch of the blades can be kept uniform, and the curvature at the time of bending can be kept small.

According to the fifth aspect of the present invention, since the inner layer is made of metal, the pitch of the blade can be maintained even when processing a hard work material, and the wire is reinforced. can do.

According to the sixth aspect of the present invention, since copper is used as the metal of the inner layer, the pitch of the blade can be maintained even when processing a hard work material, and the wire rod can be formed. Further, the wear state of the blade body can be easily identified based on the color of the copper, and the replacement time of the grinding rope can be determined.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention,
It is sectional drawing which shows an example of a grinding rope.

FIG. 2 is a diagram illustrating a state in which a workpiece is cut using a wire saw.

FIG. 3 is a diagram showing an example of a conventional grinding rope.

FIG. 4 is a partial perspective view showing an example of a conventional grinding rope blade body in a partially broken manner.

[Explanation of symbols]

 A: Grinding rope W: Abrasive grains (abrasive grains for grinding) 10: Rope 10a: Outer peripheral surface 20: Blade body 30: Blade body 40: Rope covering member (Wire covering member) 41 ... inner layer 42 ... outer layer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeru Masaki 1-5-1, Otemachi, Chiyoda-ku, Tokyo Mitsubishi Materials Corporation (72) Inventor Toshio Yao 681 Saedo-cho, Tsuzuki-ku, Yokohama, Kanagawa Japan Inside Diamond Co., Ltd. (72) Inventor Masayo Akasaka 1-14-16 Kudankita, Chiyoda-ku, Tokyo Techno-Oteuchi Corporation F-term (reference) 3C058 AA05 AA09 CA01 CB04 CB05 CB06 DA03 3C063 AA08 BA27 BB02 BC02 BG01 BG03 BG22 BG24 EE16 EE31 FF13 3C069 AA01 BA06 BB01 CA07 EA01 EA03

Claims (6)

[Claims] 1. A wire having flexibility, and abrasive grains for grinding are fixed on a side facing the outside of a spiral blade body, and are mounted so as to be wound around the wire over the entire length of the wire. And a wire covering member formed in a spiral gap of the blade body, wherein the wire covering member has a two-layer structure, A grinding rope comprising an inner layer formed on the side and an outer layer formed outside the inner layer. 2. The grinding rope according to claim 1, wherein the inner layer and the outer layer have different colors, and the inner layer is used for grinding the blade body from an outer peripheral surface of the wire. A grinding rope formed to have a predetermined thickness in a radial direction up to a position where abrasive grains are fixed. 3. The grinding rope according to claim 1, wherein the inner layer extends spirally with a width of the gap so as to be screwed into a spiral gap of the blade body. A grinding rope formed so as to maintain the pitch of the blade body. 4. The grinding rope according to claim 1, wherein the inner layer is made of a resin. 5. The grinding rope according to claim 1, wherein the inner layer is made of a metal. 6. The grinding rope according to claim 5, wherein the metal is copper.