JPH03281119A - Wire saw - Google Patents

Abstract

PURPOSE:To obtain a high cutting efficiency, by providing a cutting driven pulley rotatably at one end of the holding arm of a wire saw and winding an endless linear blade body on the cutting driven pulley and a driving pulley. CONSTITUTION:A cutting driven pulley 4 is interposed at the end 1a of a holding arm 1 and a driving pulley 5 at the other end 1b in the two thin wall members composing the holding arm 1 respectively and are supported rotatably by rotating shafts 2, 3 and an endlessly linked linear blade body 6 is wound in a loop shape on the outer peripheral parts of these pulleys 4, 5. When the linear blade body 6 is traveled at a high speed by rotating the driving pulley 5, a cutting driven pulley 4 is rotated. This linear blade body 6 is provided with a lot of the cylindrical bodies having the abrasive grain layer bonding the abrasive grain of a diamond, etc., on the external face, and the body to be cut is cut when the linear blade body 6 traveling the outer periphery of the driven pulley 4 is press-fitted to the body to be cut.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wire saw used for cutting concrete structures, asphalt road surfaces, etc.

``Conventional technology'' Conventionally, so-called circular saws, which have a thin disk shape and have an abrasive layer containing abrasive particles such as diamond particles as a blade, have been used to cut concrete structures and asphalt road surfaces. .

[Problems to be Solved by the Invention] However, although such circular saws are generally relatively expensive as cutting tools, it has been difficult to obtain high cutting efficiency. Furthermore, if a part of a circular saw is damaged, it is almost impossible to repair and reuse it, even though the abrasive grain layer in other parts is usable. , I had no choice but to discard this.

Further, such circular saws are generally heavy tools, and the equipment for holding and driving them tends to be large. For this reason, cutting work using a circular saw requires a great deal of effort in transporting, installing, etc. the cutting device.

Furthermore, in such a circular saw, the abrasive grain layer used for cutting is installed integrally with the alloy part that holds it, so vibrations caused by cutting propagate from the abrasive grain layer to the alloy, causing the alloy part to become damaged. The drawback is that it generates a lot of noise due to resonance, which may cause a great deal of discomfort to those around you, and it is not recommended to work on Hildink, etc. while it is in operation. In fact, it's impossible.

1. Means for Solving the Problem] The present invention is not intended to solve the above-mentioned problem, but a disc-shaped cutting driven pulley is provided at one end of the holding armoire 3 for rotation I'IJ function. (A large number of cylindrical bodies each having an abrasive layer containing abrasive grains on the outer surface are installed at predetermined intervals on the wheel.)
4. An endless linear blade shaped like a J is wound around the cutting driven pulley and the driving pulley.

1 Effect] In the present invention, when the drive pulley is rotated and the linear blade runs at a high speed of 1 U, the linear blade wraps around IJ.
The driven cutting pulley rotates. This linear blade is
This is a wire with many cylindrical bodies each having an abrasive layer on its outer surface made of diamond or other abrasive grains bonded by metal bonding, electrodeposition, etc., and a sliding line that runs along the outer periphery of a driven pulley for co-rotating electrofiltration cutting. By pressing the blade-like body against the object to be cut, the abrasive layer of the cylindrical body cuts the cut portion of the object to be cut, and the object is cut.

In cutting with such a linear blade, generally the above-mentioned θ)J
Compared to l''-gi and lath saws, the removal of chips from the object to be cut is high, and the coolant can be supplied smoothly.

In addition, since there is a wide range of materials to choose from for the cutting driven boob and the driving boob, the weight of each tool can be reduced by appropriately selecting one material.

Furthermore, with such a linear blade, even if the cylindrical body at the - section is damaged, it can be replaced.

Furthermore, in the present invention, on the linear blade body used for cutting,
Since the cutting driven pulley 7 that holds this is separate, it is possible to suppress the propagation of vibrations generated during cutting from the linear blade body to the cutting driven pulley.

[Embodiment] An embodiment of the present invention will be explained using FIG. 1 to FIG. 5.

In this embodiment, the holding arms L and l are the - end portions 1a.
It is composed of two thin plate-like members each having a semicircular shape and arranged side by side, and at both ends 1a and Ib, as shown in FIG. Rotating shafts 2 and 3 whose axes are YT+ are respectively installed. and,
A driven pulley 4 for cutting is mounted on one end 1al of the holding arm 1, and a driving pulley 5 is mounted on the other end 1b, which are sandwiched between two thin plate-like members that constitute the holding arm 1, and are connected to the rotating shaft. 2.3 is supported by the rotation iiJ function,
An endlessly connected linear blade body 6 is wound around the outer periphery of the cutting driven pulley 4 and the driving pulley 5 in a loop shape.

As shown in FIG. 2, this linear blade 6 includes a wire 11 that is a twisted metal wire, and an abrasive+Cj layer 13 containing abrasive grains such as diamond on the outer peripheral surface of a cylindrical metal tube 12. It has a structure in which a large number of cylindrical bodies 14 formed by metal bonding, electrodeposition, etc. are fixed at predetermined intervals by a method such as crimping.

Further, on the outer periphery of the cutting driven pulley 4, there is a first
As shown in FIG. 3, the groove 4a has a shape corresponding to the cross-sectional shape of the wire 11 of the linear blade 6, and the recess 4 has a shape corresponding to χ·1 to the outer shape of the cylindrical body 14 of the linear blade 6. ．． l) is provided, and this recess 4b is provided in the linear blade body 6 (J
The thickness of the holding arm 1 is equal to the thickness of the cylinder of the linear blade 6 at the end 1a of the holding arm 51. It is set to be smaller than the outer diameter of the shaped body 14.

On the other hand, on the outer peripheral surface of the drive pulley 5, as shown in FIG. 4, which is a YY cross-sectional view of the other end 1b of this embodiment,
1 having a shape corresponding to the cross-sectional shape of the cylindrical body 14 of the linear blade body 6
5a is formed, and this groove 5a is covered with a covering material 5b such as urethane rubber. Further, this drive pulley 5 is connected to a drive device 15 via a rotating shaft 3, and the rotating shaft 3 is fixed by having its bearing inserted into an elongated hole 1c formed in the holding arm 1. By moving this fixed position, the position of the rotating shaft 3 can be adjusted in the longitudinal direction of the holding arm 1.

Furthermore, a rotating device 7 is provided at the middle of the loop of the linear blade 6 to give a twisting motion to the linear blade 6. As shown in FIG. 5, this rotation device 7 includes a rotation shaft 21 connected to a rotation drive device (path shown), and this rotation M2.
It is composed of a barrel-shaped rotor 22 fixed so that the circumference of the body is in contact with the cylindrical body 14 of the linear blade 6.

A cover 8 is attached to the other end 1b side of the holding arm 1 so as to cover the drive pulley 5 and is integrally provided with a handle portion 8a serving as a handle.

To cut an object with a wire saw having such a configuration, first adjust the position of the rotating shaft 3 to hold the linear blade 6 at an appropriate tension, then start the drive device and move the drive pulley 5. is rotated at high speed, and the rotation drive device of the rotation device 7 is started. By starting the rotation drive device, the rotation shaft 21 of the rotation device 7 rotates, and the rotor 226 rotates accordingly, so that the linear blade 6 is given a twisting motion. As a result, the linear blade 6 travels at high speed while performing a twisting motion, causing the cutting driven pulley 4 to rotate at high speed.

After that, by grasping the handle portion 8a of the cover 8 and pressing the driven cutting pulley 4 against the cut portion of the workpiece while supplying coolant, the line running around the outer circumference of the driven cutting pulley 4 is cut. The object to be cut is cut by the shaped blade body 6.

As described above, in the present invention, the object to be cut, such as a concrete structure or an asphalt road surface, can be cut using the linear blade that travels at high speed.

Furthermore, when cutting with such a linear blade, it is highly possible to remove chips from the workpiece that are generated during cutting, and
Since the coolant is supplied smoothly, this method has the advantage that the cutting area per unit time, so-called cutting efficiency, is higher than cutting with a conventional circular saw. Furthermore, even if the same cutting efficiency is obtained, less driving force is required, so it is possible to save labor.

Further, in the present invention, by appropriately selecting the material of the cutting driven pulley and the driving pulley, it is possible to reduce the weight of the tool-shaped tool. Therefore, according to the present invention, the equipment can be easily transported and installed, and a wire saw that can be used in hand-held operations as in the embodiment shown in FIG. 1 can be manufactured.

Furthermore, such linear blades can be manufactured at a lower cost than circular saws, and even if some of the cylindrical blades are damaged, they can be reused by simply replacing them. As a result, running costs can be reduced.

Furthermore, in the present invention, the linear blade body and the cutting driven boob that holds the linear blade body are separate bodies, so that propagation of vibrations during cutting can be suppressed. As a result, resonance due to vibrations is prevented, so the generation of noise can be significantly reduced, making it possible to perform cutting operations in operating buildings or in noise-restricted locations.

In this embodiment, by installing the rotating device 7 in the middle of the loop formed by the linear blade 6, twisting motion is imparted to the linear blade 6 traveling at high speed. In this way, by twisting the linear blade 6, the object to be cut is cut in the circumferential direction of the cutting driven pulley 4 by the linear blade 6. Since cutting is added, cutting efficiency can be further improved. Further, by rotating the linear blade body 6, uneven wear of the abrasive grain layer 13 of the cylindrical body 4 in the circumferential direction can be prevented.

Furthermore, in this embodiment, the rotating device 7 was installed in the middle of the loop of the linear blade 6 to give twisting motion to the linear blade 6.
The twisting motion may be applied to the linear blade body 6 by a method other than this method. For example, by providing the rotation shaft 3 of the drive pulley 5 at an angle with respect to the holding arm l within a range that prevents the linear blade 6 from coming off the drive pulley 5, the linear blade 6 can be
It is also possible to give a twisting motion to. A wire saw having such a configuration does not require a rotation device, a rotation drive device, or the like, and therefore has the advantage of simplifying the structure and saving driving power.

Furthermore, in this embodiment, the linear blade 6 and the cutting driven pulley 4 are prevented from moving relative to each other due to the engagement between the wire II and the groove 4a, and the cylindrical body 11 and Part 4b
Relative movement in the circumferential direction is inhibited by the engagement. This prevents the linear blade 6 from shifting around the outer circumference of the driven cutting pulley 4 and coming off the driven cutting pulley 1 due to contact with the object to be cut, etc., and allows the object to be cut to be smoothly cut. It is possible to make the cut at the same time.

Note that the shape of the driven cutting pulley 1 that engages with the linear blade 6 is not limited to the embodiment shown in FIG. The filter recess is a recess 4 with a circular cross section of
The groove 4a formed on the outer circumferential surface of the driven cutting pulley 4 is covered with a covering material 5d such as urethane rubber.
] may be coated with. The cutting driven pulley 1 of this L-shaped wire saw has a groove 48 (as in the actual example shown in FIG. 1). Relative movement toward the direction [over-movement is prevented, and the recess 4c cuts the cylindrical body 14 of the linear blade 6; 11 relative movement of the driven pulley 4 in the circumferential direction is prevented
I will be killed. Therefore, the linear blade 6 is prevented from coming off the driven cutting pulley 4 or being displaced in the circumferential direction of the driven cutting pulley 4. In the embodiment shown in FIG. 6, the cylindrical body 14 of the linear blade 6 and the recess 4c of the cutting driven pulley 4 are
A minute gap is formed between the two and the chips generated during cutting are removed by this gap, making it possible to further improve the cutting efficiency. Furthermore, it is also possible to prevent impact damage when the cylindrical body I4 collides with a hard work material. In this embodiment, a covering material 4d is provided in the groove 4a of the driven cutting pulley 4, but a structure in which such a covering material 4d is not provided may be used.

In addition, in the embodiment shown in FIG. 1, the outer periphery of the drive pulley 5 is covered with a covering material 5F) such as urethane rubber. In addition to running at a sufficient speed, if sudden resistance is applied to the linear blade 6 and the linear blade 6 stops running, the covering material 5b and the linear blade 6 should be prevented from slipping. -), the drive pulley 5 and IJ idle, and the power from the drive device is cut off. This prevents the cutting driven pulley 4 and the linear blade 6 from being subject to excessive load and being worn out or destroyed.
To 4-Rokoto is possible.

Furthermore, in this embodiment, the thickness of the cutting driven pulley 1 side end 1a of the holding arm 1 is set to be smaller than the outer diameter of the cylindrical body 14 of the linear blade 6. ing. For this reason, even when the cutting work is performed by inserting the driven pulley 1 deeply into the object to be cut, interference between the holding arm 1 and the object to be cut is unlikely, and as a result, the cutting depth can be reduced. The fl that says I won't do anything that would be restricted upside down.
Scored 1 point.

Next, FIG. 7 is a side view showing another embodiment of the present invention, and the same parts as in the embodiment of FIG.

This "Tsui-no" has a holding arm I in a figure 17 shape.
[The structure is given, and the bent part of this holding arm l is provided with a driven pulley 31.
5. Characteristics and features of Orura. In addition, the drive pulley 5 of this example is connected to a drive device 33 via a drive belt 32.
Driven by.

According to this embodiment, the linear blade 61J is driven to run in the horizontal direction by the drive pulley 5, and the driven pulley 31.31
(along the holding arc 151 formed in a 17-shape)
Converts the travel route to the vertical direction.

A cutting driven pulley 4 is installed at one end 1a of this holding arm 1-11 and rotated by the linear blade 6.
By press-contacting the outer periphery of the blade 4' to the cutting site of the object to be cut, the object can be cut by the linear blade 6 running on this outer periphery.

With a wire saw having such a configuration, it is possible to obtain the same effect as the embodiment shown in FIG. 1, and since the cutting portion is bent at right angles to the embodiment shown in FIG. It has the advantage of being easy to perform, such as when cutting asphalt road surfaces.

Further, in this embodiment, the holding arm 1 is bent at a right angle, but by appropriately setting the position and number of the driven pulleys 31,
1-1. It is possible to form a holding arm l bent at an angle corresponding to the work.

[Effects of the Invention] As explained below, in the present invention, the object to be cut is cut by a linear blade that moves at high speed, and the removal of chips from the object is better than that of the conventional circular saw. In addition, since the coolant is supplied smoothly, high cutting efficiency can be obtained.

In addition, in the present invention, the selection range force (broadly speaking,
By appropriately selecting this, it is possible to keep the weight of the tool relatively light. Therefore, the equipment can be easily transported, installed, etc., and it is also possible to construct a wire saw that can be used handheld.

Further, such a linear blade body can be manufactured at a relatively low cost, and since the cylindrical body is replaceable, running costs can be reduced.

Furthermore, in the present invention, the propagation of vibrations during cutting to the pulley is suppressed, so it is possible to reduce noise during the cutting operation. This has the advantage that cutting operations can be carried out in operating buildings or in locations subject to noise regulations.

[Brief explanation of drawings]

1, 6, and 7 are side views showing one embodiment of the present invention, and FIG. 2 is a sectional view of the linear blade 6. FIG. 3 and 4 respectively show the XX cross section and the YY cross section of the embodiment shown in FIG. 1, and FIG. 5 shows the configuration of the rotating device 7 shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Holding arm, 2.3... Rotating shaft, 4... Driven pulley for cutting, 5... Driving pulley, 6... Linear blade, 7... Rotating device, 8... Case , 15.33... Drive device.

Claims (1)

[Claims] An endless wire in which a disc-shaped driven pulley for cutting is rotatably provided at one end of the holding arm, and a number of cylindrical bodies having an abrasive layer containing abrasive grains on the outer surface are provided on the wire at predetermined intervals. A wire saw characterized in that a shaped blade body is wound around the cutting driven pulley and the driving pulley.