JP2010030074A - Wire saw cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the durability of pulleys by cooling a wire saw which is in traveling and kept at a high temperature immediately after cutting. <P>SOLUTION: A wire saw cutting device 1 is equipped with the wire saw 3 set to contact with a concrete body C and a plurality of the pulleys for guiding and driving the wire saw 3 in the traveling direction F2 along its course. In the course of the wire saw 3, in the first driving pulley 41A positioned immediately after the concrete body C is cut by the wire saw 3, a cooling device 5 for spraying cooling gas toward the wire saw 3 immediately after cutting which is wound on the first driving pulley 41A is installed. The first driving pulley 41A is covered with a first cover body 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire saw cutting that cuts an object to be cut by causing the wire saw extended in contact with the object to be cut such as a concrete structure to run in the extending direction and cut into the object to be cut. Relates to the device.

As a cutting device using such a wire saw, for example, in Patent Document 1, an endless shape is provided between outer peripheries of a driving pulley that is rotationally driven by a driving means and a driven pulley that is rotatably provided. In this cutting device, a predetermined tension is applied to the wire saw and the drive pulley is rotated to run the wire saw between the driven pulleys. The object to be cut (electric pole) is cut by pressing it against the outer peripheral surface of the electric pole.
Further, in the cutting apparatus described in Patent Document 1, the cooling water is jetted toward the wire saw so as to cool the wire saw and prevent clogging and suppress dust generation from the cut portion. Yes.
JP 2001-162617 A

However, in the conventional cutting apparatus as in Patent Document 1, a plurality of driving pulleys and driven pulleys wound around the wire saw are driven to guide the wire saw to travel along a predetermined extending path. However, if these pulleys are made of a rubber material, when the wire saw that cuts the workpiece and generates heat at a high temperature passes through the pulleys, Is transmitted to the pulley, the rubber melts and becomes easy to wear, and there is a disadvantage that durability is lowered.
On the other hand, there is a method of injecting cooling water to the wire saw as in Patent Document 1 described above, but it is necessary to cool a large amount of cooling water from the nozzle or the like to the wire saw without using the cooling water. There is a need for a cutting device that can efficiently cool a wire saw and a plurality of pulleys, and there is room for improvement in that respect.

  The present invention has been made in view of the above-described problems. A wire saw cutting device capable of improving the durability of a pulley by cooling a wire saw in a high temperature state immediately after cutting while traveling. The purpose is to provide.

  In order to achieve the above object, in the wire saw cutting device according to the present invention, a wire saw extended so as to be in contact with an object to be cut, and the wire saw are guided in a traveling direction along the extending path. A wire saw cutting device provided with a pulley for driving and running, and is wound around the pulley in a pulley positioned immediately after cutting an object to be cut by a wire saw in an extending path of the wire saw. A cooling device for spraying a cooling gas toward the wire saw immediately after cutting is provided.

In the present invention, a large amount of cooling water can be jetted by spraying a cooling gas with a cooling device on a wire saw wound around a pulley immediately after cutting an object to be cut in the wire saw extending path. In addition, the object to be cut can be cut while cooling the wire saw that has become hot due to friction caused by contact with the object to be cut. Therefore, in other pulleys located on the traveling direction side than the pulley cooled in the traveling direction of the wire saw, the traveling wire saw is in a cooled state, so that the wear caused by the heat transmission of the wire saw is reduced. Can be suppressed.
Furthermore, since the cooling gas is blown to cool the pulley itself that winds the wire saw that is directly cooled by the cooling device, the wear caused by the heat transfer of the wire saw can be suppressed.

  In the wire saw cutting device according to the present invention, the pulley around which the wire saw cooled by the cooling device is preferably covered by the first cover body.

  In the present invention, since the cooling gas blown from the cooling device to the wire saw can be contained in the first cover body, the wire saw and other parts of the pulley to which the cooling gas is not directly blown are also indirectly cooled. There is an effect, and the cooling efficiency can be increased.

  Moreover, in the wire saw cutting device according to the present invention, the respective inner space portions of the first cover body and the second cover body that covers other pulleys that are not pulleys arranged in the first cover body are communicated with each other. Is preferred.

  In the present invention, the cooling gas sealed in the first cover body flows into the second cover body in which the first cover body and the inner space portion are in communication and the other pulleys are accommodated, and the first Since the internal temperature of the two-cover body is also lowered, the temperature of the wire saw can be lowered at the position where it is wound around another pulley.

  According to the wire saw cutting device of the present invention, the wire saw immediately after cutting the object to be cut is cooled by being blown with a cooling gas together with the pulley around which the wire saw is wound, and the traveling direction in the traveling direction of the wire saw rather than the pulley. Even in the other pulleys located on the side, the traveling wire saw passes in a cooled state, so it is possible to suppress wear caused by the heat transfer of the wire saw and improve the durability of all pulleys. Can be made.

Hereinafter, an embodiment of a wire saw cutting device of the present invention will be described with reference to FIGS. 1 to 4.
1 is a view showing a state of cutting a concrete body using a wire saw cutting device according to an embodiment of the present invention, FIG. 2 is a partially broken front view of the wire saw cutting device shown in FIG. 1, and FIG. It is a side view of a saw cutting device, and is an AA line arrow view shown in Drawing 2, and Drawing 4 is a top view of a wire saw cutting device.

Reference numeral 1 in FIG. 1 indicates a wire saw cutting device (hereinafter, simply referred to as a “cutting device”) in the present embodiment for cutting a concrete body C forming an object to be cut. As this concrete body C, for example, concrete such as pillars of structures, slabs, roadbeds, piers, etc. are applicable, and may be reinforced concrete. Here, the concrete body C of the present embodiment is in a state where the vertical direction is the thickness direction on the paper surface of FIG. 1 and a space is provided on the lower surface side.
In addition, in this Embodiment, the width direction of the cutting device 1 is used as the left-right direction, and the thickness direction of the concrete body C is used as an up-down direction as needed.

Although the cutting device 1 can cut in any direction, in the present embodiment, the case where the cutting device 1 is installed on the concrete body C and the concrete body C is cut in the thickness direction will be described.
Here, cutting grooves M (M1, M2) penetrating in the thickness direction are formed in advance at positions corresponding to both sides of the width dimension D of the cutting apparatus 1 for the concrete body C to be cut. The cutting grooves M1 and M2 have one end in the length direction opened on the surface side (upper surface side) of the concrete body C, and the other end opened on the back surface side (lower surface side). Of course, it may be a through hole such as a circular hole.

  As shown in FIG. 1 thru | or FIG. 3, the cutting device 1 is equipped with the base 2, the wire saw 3, the drive device 4, and the cooling device 5 as a main structure, These are further provided with the dust collector 6. It is roughly structured. Among these, the base 2 includes a base 21 made of a plate-like member for fixing to the surface of the concrete body C, and a support member 22 that extends close to and parallel to the installation surface of the base 21.

  The wire saw 3 has an annular bead (not shown) having an abrasive layer including diamond abrasive grains on the outer periphery of a flexible wire obtained by twisting a number of metal wires such as steel wires. A large number of wires are attached at predetermined intervals in the longitudinal direction of the wire, and a peritoneum such as rubber is coated on the outer periphery of the wire between the beads adjacent in the longitudinal direction.

  The drive device 4 is fixed to the base 2 by, for example, an anchor or the like in a state of being placed on the concrete body C, and a plurality of pulleys 41, 42, and 43 for winding the endless wire saw 3 are attached. . Among them, a part of pulleys (moving pulleys 43 to be described later) are separated from the fixed side of the base 2 in a direction orthogonal to the installation surface of the base 2 (upward from the plane of FIG. 1 to FIG. 3, FIG. 1 and FIG. The moving mechanism 44 for moving in the direction of arrow E shown in Fig. 2 is arranged at the approximate center in the width direction of the cutting device 1.

  The pulleys around which the wire saw 3 is wound are arranged symmetrically on both sides in the width direction of the base 2, and a pair of drive pulleys 41 (41A, 41B) that transmit rotational force to the wire saw 3 by a drive motor 45 (see FIG. 3). ) And three fixed pulleys 42 (42A, 42B, 42C) that are rotatably fixed to the support member 22 between the drive pulleys 41A, 41B, and the fixed pulleys 42A to 42C are separated so as to approach and separate from each other. It consists of a pair of moving pulleys 43 (43A, 43B) that can move in the direction (arrow E direction). Each drive pulley 41A, 41B is configured to apply a rotational force in the direction of arrow F2 (see FIG. 1) to the wire saw 3 by rotating clockwise in FIG. 2 (in the direction of arrow F1).

  That is, the wire saw 3 wound around each pulley 41, 42, 43 is wound around the outer peripheral portion on the opposite side to the installation surface of the base 2 of the second drive pulley 41B located on the right side in the left-right direction, Among these, the edge part located in the width direction outer side of the cutting device 1 passes through the inside of the cutting grooves M1 and M2 previously provided so as to wind the concrete body C, and further protrudes from the cutting groove M2. The end portion is wound around the outer peripheral portion opposite to the installation surface of the first drive pulley 41A located on the left side in the left-right direction, and then alternately wound around the fixed pulleys 42A to 42C and the moving pulleys 43A and 43B. , Connected to the other end wound around the second drive pulley 41B and connected endlessly. The first drive pulley 41A corresponds to the pulley of the present invention.

  As shown in FIG. 4, the moving mechanism 44 has one end fixed to the base 21 and a columnar guide rail 46 extending in a direction orthogonal to the installation surface of the base 21, and is slidable along the guide rail 46. The movable plate 47 and a slide drive motor 48 for driving the movable plate 47 are provided. The moving plate 47 is attached to a pair of moving pulleys 43A and 43B so as to be rotatable around a rotation axis, and is guided by a guide rail 46 so as to advance and retreat in the vertical direction.

  Thus, in the cutting device 1, the wire saw 3 travels along the extending path described above in the clockwise direction (traveling direction F2) in FIG. When 43B moves in the tension direction E, a tension force can be applied to the wire saw 3 wound around the concrete body C, and the cut surface where the concrete body C and the wire saw 3 come into contact (FIG. 1). The two-dot chain line shown in FIG. 2 is cut while moving little by little in the tension direction E.

Further, the present cutting apparatus 1 is provided with a first cover body 7 that covers the first drive pulley 41 </ b> A that is disposed at a position immediately after the wire saw 3 cuts the concrete body C in the extending path of the wire saw 3. The first cover body 7 is provided with a cooling device 5 so that the cooling device 5 can spray cooling gas onto both the first drive pulley 41A and the wire saw 3 wound around the first driving pulley 41A. It has become.
In the present embodiment, an auxiliary cover body 8 (second cover body) that covers the other second drive pulley 41B is provided, and an auxiliary cover body 9 (second cover) that covers all of the fixed pulley 42 and the moving pulley 43 is provided. Body) is provided, and the inner space portions of the first cover body 7 and the second cover bodies 8 and 9 are in communication with each other.

  As shown in FIG. 2 and FIG. 3, the cooling device 5 employs a cooling device using a vortex tube, and is located immediately after the concrete body C is cut by the wire saw 3 in the extending path of the wire saw 3. In the 1 drive pulley 41A, it arrange | positions so that cooling gas may be sprayed toward the wire saw 3 just wound around the 1st drive pulley 41A. That is, in the cooling device 5, an air supply pipe 52 to which compressed air is supplied from a compressor (not shown) is connected to a tubular apparatus body 51 having a built-in vortex tube, and the compressed air supplied from the air supply pipe 52. Is rotated at a high speed by the vortex tube to generate a vortex in the apparatus main body 51, compressed and expanded to be separated into cold air and hot air, and discharged from an injection port 51 a at one end of the apparatus main body 51. It has become.

The position of the injection port 51a is a position that is slightly spaced (separated) from the outer periphery of the first drive pulley 41A inside the first cover body 7, and is located along with the outer periphery of the first drive pulley 41A. The cooling gas can be simultaneously blown onto the wire saw 3 that is wound. The separation distance is 2 mm to 10 mm from the point that the cooling temperature rises by about 10 ° C. every time the injection port 51 a is separated from the wire saw 3 by 5 ° C. and the point that the contact due to the shake during the traveling of the wire saw 3 is reduced. The degree is preferred.
The injection port 51a is formed of a material such as rubber so that the wire saw 3 is not damaged even if the wire saw 3 comes into contact with the shake. The temperature or the like of the cooling gas ejected from the cooling device 5 can be adjusted according to the pressure and temperature of the supplied compressed air, the supply amount, and the specifications of the vortex tube, which will be specifically described later.

  Further, the dust collector 6 has a suction pipe 61 connected to a suction means (not shown) attached at a position close to the opening of the cutting groove M of the cover bodies 7, 8. Chips (concrete powder) of an object to be ejected from the concrete body C toward the traveling direction F <b> 2 are accommodated in the cover body 7 </ b> A and sucked from the suction pipe 61 to be collected.

Next, a wire saw cutting method in the case of partially cutting the concrete body C as an object to be cut as described above by the wire saw cutting device 1 configured as described above will be described based on the drawings.
As shown in FIG. 1, first, the wire saw 3 that is spanned and connected in an endless manner so as to form the above-described extension path is formed between the cutting grooves M1 and M2 formed in the concrete body C. By driving the slide drive motor 48 of the moving mechanism 44 and moving the moving pulleys 43A and 43B along with the moving plate 47 in the tension direction E so as to be in close contact with the inner surface, the fixed pulley 42 and the moving pulley 43 Will pull each other and a predetermined tension is introduced.

  In this state, the drive pulley 41A, 41B is rotated by the drive motor 25 to cause the wire saw 3 to travel in the traveling direction F2, while the moving plate 47 is further separated from the installation surface together with the pair of moving pulleys 43A, 43B ( By moving in the tension direction E), further tension force is applied to the wire saw 3 located in the concrete body C, and the concrete body C is cut as shown by the two-dot chain line in FIG. The position where the wire saw 3 comes into contact with the wire saw 3 is cut while gradually changing toward the surface side of the concrete body C (the cutting device 1 side).

At this time, in the present cutting apparatus 1, the wire wound around the outer peripheral portion of the first drive pulley 41 </ b> A immediately after cutting the concrete body C in the extending path of the wire saw 3, that is, immediately after coming out of the cutting groove M. By blowing the cooling gas onto the saw 3 by the cooling device 5, the concrete body is cooled while the wire saw 3 that has become hot due to friction caused by contact with the concrete body C is cooled without blowing a large amount of cooling water. C can be cut.
Therefore, the traveling wire saw 3 is cooled also in other pulleys (reference numbers 41B, 42A to 42C, 43A, and 43B pulleys) positioned on the traveling direction side of the first drive pulley 41A in the traveling direction of the wire saw 3. Since it is the state by which it was made, the abrasion which arises by the heat transfer of the wire saw 3 can be suppressed.
Furthermore, since the cooling gas is blown and cooled also in the first drive pulley 41A itself around which the wire saw 3 that is directly cooled by the cooling device 5 is wound, wear caused by heat transfer of the wire saw 3 can be suppressed. .

The temperature of the cooling gas sprayed on the wire saw 3 in this way depends on the cutting area of the object to be cut (concrete body C), the presence or absence of internal reinforcing bars, the outer diameter of the wire saw 3, the traveling speed, and the like as described above. in the case it is adjusted, for example, the temperature of the wire saw 3 immediately after the cutting is exothermic to 120 ° C. to 210 ° C., at a pressure of ^{0.6MPa~0.7MPa,} 0.4m ³ /min~0.8m 3 / The temperature of the wire saw 3 can be lowered to 30 ° C. to 50 ° C. by spraying a cooling gas of 0 ° C. to −40 ° C. with an air volume of min.
If the temperature of the cooling gas is too low, the rubber of the peritoneum coated between the beads of the wire saw 3 will be peeled off due to low-temperature deterioration, and the wire inside will be exposed and the wire saw 3 There is a risk of shortening the life of the product. Therefore, in such a wire saw cutting method, the temperature of the cooling gas is preferably in the range of 0 ° C to -40 ° C.

  Moreover, in this Embodiment, since the separation distance of the injection port 51a of the cooling device 5 and the wire saw 3 is set to 2 mm-10 mm as mentioned above, it is wound around 41 A of 1st drive pulleys. Cooling can be effectively performed at a position close to the wire saw 3 and the first drive pulley 41 </ b> A while suppressing contact with each other due to vibration caused by the traveling of the wire saw 3.

Furthermore, since it is a cooling method that does not use water, it is possible to perform cutting work while maintaining a clean environment without splashing or flowing out water mixed with cooling water or chips around the work site. There is an effect.
In addition, by blowing the cooling gas onto the wire saw 3 in this way, it is possible to blow away and remove the chips (the concrete powder scraped off from the concrete body C in this embodiment) adhering to the surface of the wire saw 3. As a result, the wire saw 3 can be prevented from being clogged with chips, and further reliable cooling can be achieved.

And since the cooling gas sprayed on the wire saw 3 from the cooling device 5 can be enclosed in the 1st cover body 7, other of the wire saw 3 and 1st drive pulley 41A which are not directly sprayed with a cooling gas The portion also has an effect of indirectly cooling, and the entire pulley can be efficiently cooled.
Moreover, the cooling gas sealed in the first cover body 7 flows into the second cover bodies 8 and 9 in which the first cover body 7 and the inner space communicate with each other and other pulleys are accommodated. Then, since the internal temperature of the second cover 8, 9 body also decreases, the temperature of the wire saw 3 is set at the position where it is wound around the other pulleys (pulleys 41B, 42A to 42C, 43A, 43B) and the pulleys. It is possible to lower.

Furthermore, according to the present embodiment, the wire saw 3 is cooled and once returned to a low temperature in a range in which the wire saw 3 is not cut in contact with the concrete body C in the extending path of the wire saw 3,
An effect of suppressing heat generation at the time of cutting the concrete body C can be provided.

  On the other hand, in the present cutting apparatus 1, since the suction pipe 61 of the dust collector 6 is disposed in the first cover body 7 and the second cover body 8, chips attached to the wire saw 3 are discharged. It is collected in the cover bodies 7 and 8 and sucked and collected by the suction pipe 61, so that chips can be prevented from scattering.

  As described above, in the wire saw cutting device according to the present embodiment, the wire saw 3 immediately after cutting the concrete body C is cooled by blowing the cooling gas together with the first drive pulley 41A around which the first wire pulley 3 is wound. Even in the other pulleys (pulleys 41B, 42A to 42C, 43A, 43B) located on the traveling direction side in the traveling direction of the wire saw 3 relative to the drive pulley 41A, the traveling wire saw 3 is cooled. Since it passes, the wear caused by the heat transfer of the wire saw 3 can be suppressed, and the durability of all the pulleys can be improved.

As mentioned above, although embodiment of the wire saw cutting device by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the present embodiment, the pulley for blowing the cooling gas is the first drive pulley 41A, but is not limited to this, and the pulley to be cooled is set according to the arrangement form of the pulley provided in the wire saw cutting device do it. The point is that the wire saw 3 immediately after cutting the object to be cut can be cooled together with the pulley, and the pulley itself may be a driving pulley or a driven pulley.
The configuration of the extending path of the wire saw 3 and the arrangement, quantity, size, etc. of the pulleys 41, 42, 43 of the driving device 4 is not limited to this embodiment, and the shape of the object to be cut, It can be set arbitrarily according to conditions such as the material and cutting range.

  Moreover, the position of the jet outlet 51a of the cooling device 5 should just be the range of the outer peripheral part of the 1st drive pulley 41A around which the wire saw 3 immediately after cutting | wrapping is wound, and the position does not need to be one specified point. For example, it goes without saying that the cooling effect is higher as the winding start position is closer to the winding start position of the outer periphery of the first drive pulley 41A.

  In the present embodiment, the second cover bodies 8 and 9 are provided. However, the present invention is not limited to this, and only the first cover body 7 covering the first drive pulley 41A may be used. And also in the 1st cover body 7, although it is preferable also from the point of the cooling effect mentioned above, the structure abbreviate | omitted may be sufficient.

  Furthermore, in the wire saw cutting device of the present embodiment, the cooling device 5 using a vortex tube is used, and a simple structure capable of generating a low-temperature cooling gas simply by supplying compressed air from the compressor. However, in addition to such a cooling device 5, for example, a liquefied gas such as low-temperature carbon dioxide gas or liquid nitrogen is mixed with air or the like as necessary to adjust the temperature. A cooling device that sprays the wire saw 3 as a cooling gas may be used.

It is a side view which shows schematic structure of the mold clamping apparatus of the injection molding machine by embodiment of this invention. It is a partially broken front view of the wire saw cutting device shown in FIG. It is a side view of a wire saw cutting device, Comprising: It is an AA arrow directional view shown in FIG. It is a top view of a wire saw cutting device.

Explanation of symbols

1 Cutting device (Wire saw cutting device)
DESCRIPTION OF SYMBOLS 3 Wire saw 4 Driving device 41, 41A, 41B Driving pulley 42, 42A-42C Fixed pulley 43, 43A, 43B Moving pulley 44 Moving mechanism 5 Cooling device 51a Injection port 6 Dust collector C Concrete body (to-be-cut object)
E Tension direction F1 Rotation direction of drive pulley 41 F2 Travel direction of wire saw 3

Claims (3)

A wire saw cutting device comprising a wire saw extended so as to come into contact with an object to be cut, and a pulley for guiding and driving the wire saw in a traveling direction along the extending path. ,
A cooling device that blows a cooling gas toward a wire saw immediately after cutting, which is wound around the pulley in a pulley positioned immediately after the workpiece is cut by the wire saw in the extending path of the wire saw. A wire saw cutting device characterized by comprising:   The wire saw cutting device according to claim 1, wherein a pulley around which the wire saw cooled by the cooling device is covered with a first cover body.   3. The inner space of each of the first cover body and the second cover body that covers the other pulley that is not the pulley disposed in the first cover body is communicated with the first cover body. Wire saw cutting device.

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