Dust collection port

Abstract

To automatize a dust collection operation in a cutting operation using a wire saw machine.SOLUTION: A dust collection port 7 is supported by a fitting unit 8 connected to a pulley unit P, a part of the outer circumference of a pulley 3 is inserted into the dust collection port 7 through a slit 710 of the dust collection port 7 and is arranged adjacently to the pulley unit P and a suction port 70 of the dust collection port 7 is arranged adjacently to a cutting drawing end of dust of a cutting object and oppositely to a drawing direction of a wire saw W from the cutting drawing end, and the wire saw W is inserted into the dust collection port 7 through the suction port 70 of the dust collection port 7 so as to be extended from the slit 710 to the outside of the dust collection port 7.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a dust collector used for wire saw machines, and particularly relates to a dust collection port used for sucking dust (cutting powder) generated during cutting of an object to be cut by a wire saw. Background Art

[0002] Conventionally, a construction method of cutting an object to be cut such as a reinforced concrete structure using a wire saw machine is known. As disclosed in Patent Document 1, this type of construction method comprises: endlessly wrapping a wire saw along the periphery (cutting position) of the object to be cut via a pair of guide pulleys and a drive pulley of a drive device to bring the wire saw into linear contact; rotating the wire saw at a high speed by the drive device; maintaining an appropriate tension required for cutting as the cutting of the object to be cut by the wire saw progresses through the movement of the drive device; and cutting (sawing through) concrete, reinforcing steel and the like of the object to be cut with the wire saw.

[0003] In this construction method, during cutting of the object to be cut by the wire saw, dust is scattered from the cutting and drawing-out end of the dust that is cut by the wire saw and drawn out together with the wire saw, so it is necessary to carry out dust collection work for the dust together with the cutting work of the object to be cut. This dust collection work is performed using a dust collector. This type of dust collector generally consists of a dust collector main body and a dust collection hose extending from the dust collector main body, and a dust collection port is provided at the end of the dust collection hose. The dust collection port is formed of a cylindrical portion having a suction port at the distal end thereof. In dust collection work using this dust collector, generally, in order to install the wire saw machine close to the object to be cut, each member forming a frame arranged around the object to be cut and each auxiliary member arranged around the object are used to support and fix the dust collection port, and the suction port of the dust collection port is arranged oppositely close to the cutting and drawing-out end of the dust of the object to be cut. The dust collection port sucks the dust scattered together with the drawing-out of the wire saw from the cutting and drawing-out end of the dust of the object to be cut. Prior Art Documents Patent Documents

[0004] [Patent Document 1] Japanese Patent Publication No. 2009-101542 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, in dust collection operations using such dust collection devices, especially those using a dust collection port, as previously described, while the wire saw is cutting the object to be cut, the dust collection port, which is supported and fixed near the object to be cut, sucks up the dust that is scattered from the cutting end of the object to be cut along with the extension of the wire saw. Therefore, the support and fixing position of the dust collection port must be changed to match the position of the cutting end of the object to be cut, which is displaced as the wire saw progresses relative to the object to be cut. In other words, while the wire saw is cutting the object to be cut, the position of the cutting end of the object to be cut and the position of the suction port of the dust collection port must be aligned, that is, they must face each other. Therefore, it is necessary to check the position of this dust collection port while the wire saw is cutting the object to be cut. Then, before the position of this dust collection port becomes misaligned, the support and fixing position of the dust collection port must be changed to match the position of the cutting end of the object to be cut. This modification must be performed each time the position of the end of the cutting edge of the material being cut and the position of the dust collection port become misaligned during wire saw cutting, making it an extremely cumbersome process. Furthermore, if the position of the end of the cutting edge of the material being cut and the position of the dust collection port become misaligned, dust collection loss occurs, and dust is scattered around the work area. In this case, if the dust collection loss is excessively large, the risk of dust exposure to workers increases, and on the other hand, the burden of cleaning up dust during or after cutting the material being cut with the wire saw also increases.

[0006] The present invention aims to solve these conventional problems by automating the dust collection process and ensuring worker safety, while also significantly reducing dust collection losses, by positioning the dust collection port close to the pulley and linking it to the pulley. [Means for solving the problem]

[0007] To achieve the above objective, the present invention A dust collection port comprising a cylindrical portion having a suction port at its tip, provided at the end of a dust collection hose extending from a dust collection device, movably positioned on a rail installed near the object to be cut, and positioned close to a pulley unit having a support shaft and pulley around which the wire saw extending from the drive unit of the wire saw machine body is wound and which moves together with the pulling of the wire saw by the drive unit, and which collects dust at the cutting end of the dust that is cut by the wire saw of the object to be cut and pulled out together with the wire saw, The circumferential surface of the cylindrical portion has a slit that allows a part of the outer circumference of the pulley to be inserted from the tip in an axial direction, The suction port of the cylindrical portion is expanded on the side opposite to the slit, and the side of the circumferential surface of the cylindrical portion opposite to the slit protrudes in a triangular pyramidal shape. The cylindrical portion is supported by a mounting unit connected to the support shaft and extending parallel to the pulley from the support shaft, with a portion of the outer circumference of the pulley inserted into the cylindrical portion through the slit in the cylindrical portion, so that the cylindrical portion is positioned close to the pulley unit, and the suction port of the cylindrical portion is positioned close to the cutting end of the dust from the object to be cut, and opposite to the direction in which the wire saw is pulled out from the cutting end of the dust. The wire saw is drawn out from the cutting end of the dust from the object to be cut. 、 The cylindrical portion Expanded Through the aforementioned suction port The side opposite to the aforementioned slit is protruding in a triangular pyramidal shape. Inserted into the cylindrical portion and extending out of the cylindrical portion from the slit, This is the gist of it.

[0008] Furthermore, it is preferable that the dust collection port be specifically designed as follows: (1) The cylindrical part is separate from the dust collection hose, has a suction port at one end and a connecting port at the other end that can be attached to the tip of the dust collection hose, and has a slit cut out from the circumferential surface of the cylindrical part in the axial direction from one end, and is attached to the tip of the dust collection hose in a manner that allows it to be attached to the tip. (2 )toriThe attached unit supports the pulley unit. on the axis The system includes a rod guide extending parallel to the pulley and mounted in any direction around the entire circumference of the support shaft, and a support rod that is slidably engaged with the rod guide in its extending direction and fixed in any sliding position, and extends parallel to the pulley from the rod guide to the outside of the outer circumference of the pulley, with the cylindrical portion being attached to the support rod. ( 3 )the above( 2 Instead of the pulley unit, the mounting unit supports the pulley unit. on the axis The device comprises: a rod guide extending parallel to the pulley and mounted in any direction around the entire circumference of the support shaft; a support rod slidably engaged with the rod guide in its extending direction and fixed in any sliding position, extending from the rod guide parallel to the pulley and outward from the outer circumference of the pulley; a mounting rod extending from the support rod parallel to the support shaft outside the outer circumference of the pulley; and a mounting portion provided on the other end of the cylindrical portion, slidably engaged with the mounting rod, and fixed in a sliding position where the slit faces the outer surface of the pulley and a part of the outer circumference of the pulley can be inserted into the cylindrical portion through the slit. The aforementioned The cylindrical portion may be attached to the mounting rod via the mounting portion.

[0009] Furthermore, it is preferable that this dust collection port be used in a follow-type pulley unit. In this case, the follow-type pulley unit comprises a pulley base movably arranged on a rail, a pulley arm rotatably supported on the pulley base via a pivot shaft, a pulley rotatably supported at one end of the pulley arm via a pivot shaft parallel to the pulley arm, a stopper provided at the other end of the pulley arm so as to be able to contact and separate from the rail by the rotation of the pulley arm, and a spring member that biases the other end of the pulley arm to rotate toward the rail and presses the stopper against the rail in its normal state, and the wire saw is wrapped around the object to be cut, and the drive unit drives the wire saw to cut the object While the wire is being cut, the wire saw is pulled by the drive unit, and when the tension of the wire saw acting on the pulley becomes greater than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm rotates in a direction that causes the stopper to move away from the rail, and when the tension of the wire saw acting on the pulley becomes less than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm is elastically returned by the spring member so that the stopper is pressed against the rail, and it is desirable that the pulley automatically follows the pulling of the wire saw by the drive unit. [Effects of the Invention]

[0010] In the dust collection port of the present invention, the cylindrical portion is supported by a mounting unit that is connected to a support shaft and extends parallel to the pulley from the support shaft. A portion of the outer circumference of the pulley is inserted into the cylindrical portion through a slit in the cylindrical portion, so that the cylindrical portion is positioned close to the pulley unit. The suction port of the cylindrical portion is positioned close to the cutting end of the dust from the workpiece to be cut and opposite to the direction in which the wire saw is pulled out from the cutting end of the dust. The wire saw pulled out from the cutting end of the dust from the workpiece to be cut is inserted into the cylindrical portion through the suction port and extends out of the cylindrical portion through the slit. By positioning the dust collection port close to the pulley unit and linking it with the pulley unit in this way, dust generated from the workpiece to be cut can be automatically and reliably collected by this dust collection port. This automation also ensures the safety of the workers. Furthermore, the structure of this dust collection port significantly improves dust collection efficiency, and dust collection loss can be greatly reduced compared to conventional methods, thus providing a unique and exceptional effect of the present invention. Furthermore, in the dust collection port of the present invention, the suction port of the cylindrical part is expanded on the side opposite the slit, and the side of the circumferential surface of the cylindrical part opposite the slit is projected in a triangular pyramidal shape. The wire saw, which is pulled out from the cutting end of the object to be cut, is inserted through the expanded suction port of the cylindrical part, with the side opposite the slit projecting in a triangular pyramidal shape, and extends out of the cylindrical part from the slit. In this way, the dust cut from the object to be cut by the wire saw and scattered in the direction of the wire saw's pull-out is sucked and guided through the expanded suction port of the cylindrical part, through the triangular pyramidal projection of the cylindrical part, and sent to the dust collection hose. This provides a unique and remarkable effect of the present invention, which ensures that dust generated from the object to be cut is reliably sucked up at the dust collection port, and significantly reduces leakage during suction. [Brief explanation of the drawing]

[0011] [Figure 1] A diagram (perspective view) showing the configuration of a dust collection port according to one embodiment of the present invention, together with the mounting unit and pulley unit. [Figure 2] The diagram shows the configuration of the dust collection port along with the mounting unit ((a) is a top view, (b) is a front view, and (c) is a side view). [Figure 3] This diagram (exploded perspective view) shows the configuration of the dust collection port along with the mounting unit and pulley unit. [Figure 4] This diagram (perspective view) shows the dust collection port attached to the pulley unit using a mounting unit. [Figure 5] Diagram showing how to attach the mounting unit to the pulley unit, and how to attach the dust collection port to the mounting unit. [Figure 6] A diagram (side view) showing the configuration of a follow-type pulley unit to which the dust collection port is applied. [Figure 7] This diagram (enlarged perspective view) shows the dust collection port attached to a follow-type pulley unit. [Figure 8] Figure (perspective view) showing a wire saw machine using the same pulley unit with a dust collection port [Figure 9] Figure (perspective view) showing a modified example of the dust collection port, illustrating the dust collection port together with a mounting unit and a pulley unit [Figure 10] Figure showing a modified example of the dust collection port ((a) is a plan view, (b) is a front view, (c) is a side view) [Figure 11] Figure (perspective view) showing a modified example of the dust collection port and illustrating a wire saw machine using the pulley unit with the same dust collection port MODE FOR CARRYING OUT THE INVENTION

[0012] Next, an embodiment for carrying out the present invention will be described with reference to the drawings. FIGS. 1 to 4 show a dust collection port of a dust collector used for a pulley unit of a wire saw machine.

[0013] As shown in FIG. 1, a pulley unit P of a wire saw machine comprises a support shaft 31 and a pulley 3, (refer to FIG. 8 here) is movably arranged on a rail (R) installed in the vicinity of an object to be cut, and has a wire saw (W) extended from a drive unit M11 of a wire saw machine body wound thereon, so that the wire saw (W) is moved along with the traction of the wire saw (W) by the drive unit (M11). In this case, the pulley 3 has a bearing (not shown) integrally incorporated at the center, and the support shaft 31, as shown in FIG. 3, is composed of a shaft 311 that passes through the bearing of the pulley 3 and is fixed to a pulley base (1 (see FIG. 8)), and a head 312 at the base end of the shaft 311. As shown in FIGS. 1 and 2, the dust collection port 7 of the dust collector comprises a cylindrical portion 71 having a suction port 70 at the tip, is provided at the tip of a dust collection hose extended from the dust collector, is arranged adjacent to the pulley unit P, and is configured to collect dust at the cutting and drawing-out end of the object to be cut where dust cut by the wire saw and drawn out together with the wire saw is collected.

[0014] As shown in Figures 2 and 3, the dust collection port 7 has a slit 710 on the circumferential surface of the cylindrical portion 71, allowing a portion of the outer circumference of the pulley 3 to be inserted axially from the tip. This cylindrical portion 71 is supported by a mounting unit 8 that is connected to the support shaft 31 of the pulley unit P and extends from the support shaft 31 parallel to the pulley 3 (the plane around its center). A portion of the outer circumference of the pulley 3 is inserted into the cylindrical portion 71 through the slit 710 of the cylindrical portion 71, so that the cylindrical portion 71 is positioned close to the pulley unit P, and the suction port 70 of the cylindrical portion 71 is positioned close to the cutting end of the dust from the object to be cut, and opposite to the direction in which the wire saw is pulled out from the cutting end of the dust from the object to be cut. In this way, the wire saw pulled out from the cutting end of the dust from the object to be cut is inserted into the cylindrical portion 71 through the suction port 70 of the cylindrical portion 71 and extends out of the cylindrical portion through the slit 710.

[0015] As shown in Figures 1 and 2, the cylindrical portion 71 of the dust collection port 7 is separate from the dust collection hose, has a suction port 70 at one end and a connecting port 72 at the other end that can be attached to the tip of the dust collection hose, and has a slit 710 cut out from the circumferential surface of the cylindrical portion 71 in the axial direction from one end, so that it can be attached to the tip of the dust collection hose.

[0016] In this case, the cylindrical portion 71 is formed in a basic rectangular shape, and the suction port 70 at one end is expanded on the side opposite to the slit 710, so that the side of the circumferential surface of the cylindrical portion 71 opposite to the slit 710 protrudes in a triangular pyramidal shape, and a connecting port 72 is formed to protrude cylindrically at the other end. In this case, the cylindrical portion 71 is formed in a basic rectangular shape with a square cross-section. The opening at one end of this cylindrical portion 71, i.e., the suction port 70, is square, and the side opposite to the slit 710 is expanded, so that the suction port 70 extends toward the opposite side and takes on an elongated rectangle shape. Along with the expansion of the opening at one end of the cylindrical portion 71, the side of the circumferential surface opposite to the slit 710 protrudes in a triangular pyramidal shape. In this case, the surface opposite to the slit 710 on the circumferential surface is one side of a rectangular tubular shape with a square cross-section, and one end of this surface protrudes in a triangular pyramidal shape. This surface has two side portions 711 that protrude in a right-angled triangular shape from both sides, and a long, narrow rectangular inclined surface portion 712 connected between the slanted edges that form the hypotenuse of the right-angled triangle on these two side portions 711, with the other end being flat. The surface on the slit 710 side is one side of a rectangular tubular shape with a square cross-section and is formed as a whole to be flat. The slit 710 is formed on this surface from one end in the axial direction, with a width slightly larger than the width of the pulley 3 and a length slightly smaller than the diameter of the pulley 3, so that a part of the outer circumference of the pulley 3 can be inserted through it. At the other end of this tubular portion 71, a connecting portion 72 is formed cylindrically and concentrically with the axis of the tubular portion 71. In this case, the connecting portion 72 is formed so that it can be press-fitted into the opening at the tip of the dust collection hose.

[0017] Furthermore, this cylindrical portion 71, that is, the dust collection port 7, may be made of metal, plastic, or the like.

[0018] As shown in Figure 1, the mounting unit 8 includes a rod guide 81 that extends parallel to the pulley 3 (the plane around its center) on the support shaft 31 of the pulley unit P and is mounted in any direction around the entire circumference of the support shaft 31, and a support rod 82 that is slidably engaged with the rod guide 81 in the direction in which it extends and is fixed in any sliding position, and extends from the rod guide 81 parallel to the pulley 3 and outward from the outer circumference of the pulley 3, and the cylindrical portion 71 is attached to the support rod 82. In this case, the cylindrical portion 71 may be directly fixed to the support rod 82 by welding, bolts and nuts, etc.

[0019] However, the mounting unit 8, in particular as shown in Figure 4, includes a rod guide 81 (see Figure 1) that extends parallel to the pulley 3 at the tip of the support shaft 31 of the pulley unit P and is mounted in any direction in the circumferential direction of the support shaft 31; a support rod 82 (see Figure 1) that is slidably engaged with the rod guide 81 in the direction in which it extends and is fixed in any sliding position, and extends from the rod guide 81 parallel to the pulley 3 to the outside of the outer circumference of the pulley 3; a mounting rod 83 that extends from the support rod 82 parallel to the support shaft 31 on the outside of the outer circumference of the pulley 3; and a mounting portion 84 provided on the other end of the cylindrical portion 71, which is slidably engaged with the mounting rod 83, and is fixed in a sliding position where the slit 710 (see Figure 1) of the cylindrical portion 71 faces the outer circumferential surface of the pulley 3, and a part of the outer circumference of the pulley 3 can be inserted into the cylindrical portion 71 through the slit 710.

[0020] In this case, it is desirable that the rod guide 81 of the mounting unit 8, the support rod 82, the mounting rod 83, and the mounting portion 84 of the cylindrical portion 71 each have the following configurations.

[0021] As shown in Figure 1, the rod guide 81 comprises a mounting plate 811 and a cylindrical guide 812 fixed to one end of the mounting plate 811. The mounting plate 811 is an L-shaped plate, having a large, vertically elongated rectangular flat plate and a smaller, horizontally elongated rectangular flat plate that protrudes from one end of the large flat plate perpendicular to the plane of the flat plate. The large flat plate has a support shaft insertion hole 810 formed in the center of the width direction on the other end, serving as the mounting portion for the mounting plate 811, while the smaller flat plate serves as the mounting portion for the guide 812. The guide 812 is a rectangular tube, in this case a rectangular tube with a square cross-section, made of a rectangular pipe, and is sized to be positioned on the right-angle surface between the large flat plate and the small flat plate on one end of the mounting plate 811, and is fixed to this right-angle surface by welding, bolts and nuts, etc. Furthermore, as shown in Figure 4, screw holes 813 are drilled at appropriate positions on the circumferential surface of the guide 812, and fixing screws S1 for fastening the guide 812 to the support rod 82 can be screwed into these screw holes 813. The cross-sectional shape of the guide 812 corresponds to the cross-sectional shape of the support rod 82, which will be described later. For example, if the support rod 82 has a rectangular cross-section, the guide 812 will also have a rectangular tubular cross-section, and if the support rod 82 has a circular cross-section, the guide 812 will also have a cylindrical cross-section. In addition, the guide 812 only needs to have the function of moving and guiding the support rod 82 so that it can move forward and backward. Even if the guide 812 is cylindrical, it may have a slit on one side of the cylinder, or the guide 812 may have a U-shaped cross-section instead of a cylinder, and furthermore, the guide 812 may be frame-shaped or consist of multiple rings.

[0022] As shown in Figures 1 and 4, the support rod 82 is slidably fitted into the guide 812 of the rod guide 81, and is made of a rectangular tube or rectangular bar corresponding to the cross-sectional shape inside the guide 812, in this case a rectangular pipe, and has a length that is at least greater than the radius of the pulley 3, and in this case longer than the diameter of the pulley 3. Furthermore, since the mounting rod 83, which will be described later, is extended from this support rod 82, an extension rod 821 is provided for extending the mounting rod 83. The extension rod 821 extends from the end of the support rod 82 that extends to the outside of the outer circumference of the pulley 3, parallel to the pulley 3 and perpendicular to the support rod 82, with the same cross-sectional shape as the support rod 82, in this case a rectangular cross-section, to a predetermined length by the length necessary to attach the mounting rod 83, which will be described later.

[0023] As shown in Figure 4, the mounting rod 83 is formed in a T-shape overall and consists of a connecting portion 830 that can be connected to the extension rod 821 of the support rod 82, and a mounting portion 831 that can be slidably engaged with the mounting portion 84, which will be described later. The connecting portion 830 is formed to fit onto the extension rod 821, and has the same cross-sectional shape as the extension rod 821, but slightly larger; that is, it is a rectangular shape with a square cross-section and shorter than the extension rod 821, and in this case it is made of a rectangular pipe. In addition, screw holes 830a are drilled at appropriate positions on the circumferential surface of this connecting portion 830, and fixing screws S2 for fastening this connecting portion 830 to the extension rod 821 can be screwed into these screw holes 830a. The mounting portion 831 extends perpendicularly to the circumferential surface of the connecting portion 830, in this case from the middle of the length direction of one side, and is formed to a predetermined length with a cross-sectional shape that can engage with the mounting portion 84 of the cylindrical portion 71, which will be described later. Here, the mounting portion 831 is made of a square pipe with a square cross-section so that the mounting portion 84 of the cylindrical portion 71, which will be described later, can be fitted onto it. In this way, the mounting rod 83 extends from one side of the connecting portion 830 in a direction parallel to the support shaft 31 of the pulley 3 and perpendicular to the support rod 82.

[0024] As shown in Figure 4, the mounting portion 84 is formed in a rectangular tubular shape, slightly larger than the mounting portion 831 and approximately the same length as the mounting portion 831, so that it can slide around the mounting portion 831 of the mounting rod 83 by inserting the mounting portion 831 through it. In this case, it is made of a rectangular pipe with a square cross-section. The mounting portion 84 only needs to have the function of moving and guiding the mounting rod 83 so that it can move forward and backward. Even if the mounting portion 84 is cylindrical, it may have a slit on one side of the cylindrical shape, or the mounting portion 84 may have a U-shaped cross-section instead of being cylindrical, and furthermore, the mounting portion 84 may be frame-shaped or made of multiple rings. The mounting portion 84 is fixed by welding or the like to one side of the dust collection port 7, in this case the side opposite to the side with the slit 710, approximately in the center in the longitudinal direction of the dust collection port 7, with the axial direction of the mounting portion 84 oriented perpendicular to the longitudinal direction of the surface of the dust collection port 7.

[0025] In this way, the mounting unit 8 is attached to the pulley unit P via the support shaft 31, and the dust collection port 7 is attached to the mounting rod 83 via the mounting portion 84 and supported by the mounting unit 8.

[0026] Figure 5 shows how the mounting unit 8 is attached to the pulley unit P, and how the dust collection port 7 is attached to the mounting unit 8. Please also refer to Figure 3. In these mountings, the pulley unit P is installed with the axis of the pulley 3 oriented horizontally.

[0027] To attach the mounting unit 8 to the pulley unit P, first, as shown in Figure 5(1), the rod guide 81 is attached to the head 312 side end of the support shaft 31 of the pulley unit P. In this case, as shown in Figure 3, the mounting plate 811 of the rod guide 81 is positioned on the outer surface of the pulley 3 via a collar 32, with the guide 812 positioned horizontally along the surface of the pulley 3 above the bearing of the pulley 3. The support shaft 31 is inserted through the support shaft insertion hole 810 of the mounting plate 811, through the collar 32, into the bearing of the pulley 3, and the mounting plate 811 is attached to the head 312 side end of the support shaft 31 (shaft 311).

[0028] Next, as shown in Figure 5(2), the support rod 82 is passed through the guide 812 of the rod guide 81, with the extension rod 821 facing upwards, and the extension rod 821 is positioned near the outer edge of the pulley 3.

[0029] Next, as shown in Figure 5(3), the mounting rod 83 is connected to the support rod 82 via the extension rod 821. In this case, the extension rod 821 is passed through the connecting portion 830 of the mounting rod 83 and the connecting portion 830 is attached around the extension rod 821. Then, the fixing screw S1 is tightened through the screw hole 830a of the connecting portion 830 to fasten and secure the connecting portion 830 and the extension rod 821.

[0030] Then, as shown in Figures 5(4) and (5), the dust collection port 7 is attached to the mounting portion 831 of the mounting rod 83 via the mounting portion 84 of the cylindrical portion 71, and then attached and supported by the mounting unit 8. In this case, the slit 710 of the cylindrical portion 71 of the dust collection port 7 is directed toward the pulley unit P, the end of the mounting portion 831 of the mounting rod 83 and the end of the mounting portion 84 of the cylindrical portion 71 are brought into contact, the end of the mounting portion 831 of the mounting rod 83 is inserted into the mounting portion 84 of the cylindrical portion 71, and the mounting portion 84 of the cylindrical portion 71 is slid around the mounting portion 831 of the mounting rod 83 toward the connecting portion 830, so that the slit 710 of the cylindrical portion 71 is aligned with the position of the outer circumferential surface of the pulley 3 and they face each other. From this state, the support rod 82 is pushed back within the rod guide 81 and a part of the outer circumference of the pulley 3 is positioned inside the cylindrical portion 71 through the slit 710 of the cylindrical portion 71. Then, the fixing screw S1 is tightened through the screw hole 813 of the rod guide 81 to secure the rod guide 81 to the support rod 82. This completes the installation of the mounting unit A and the dust collection port 7.

[0031] Figures 6, 7, and 8 illustrate specific examples of how this dust collection port 7 can be used. Furthermore, it is preferable that this dust collection port 7 be used in the follow-type pulley unit P proposed by the present inventor in a previous application (Japanese Patent Publication No. 2022-70671). Figure 6 shows this follow-type pulley unit P, Figure 7 shows the dust collection port 7 attached to this follow-type pulley unit P, and Figure 8 shows a wire saw machine M using this pulley unit P and dust collection port 7.

[0032] As shown in Figure 6, this follow-type pulley unit P comprises a pulley base 1 movably positioned on the rail R, a pulley arm 2 rotatably supported on the pulley base 1 via a pivot shaft 211, a pulley 3 rotatably supported at one end of the pulley arm 2 via a pivot shaft 31 parallel to the pulley arm 2, a stopper 4 provided at the other end of the pulley arm 2 so as to be able to contact and separate from the rail R by the rotation of the pulley arm 2, and a spring member (coil spring) 5 that biases the other end of the pulley arm 2 toward the rail R and presses the stopper 4 against the rail R in its normal state. This pulley unit P has the following configuration: the wire saw is wrapped around the object to be cut, and while the object is being cut by the wire saw driven by the drive unit, the wire saw is pulled by the drive unit. When the tension of the wire saw acting on the pulley 3 becomes greater than the rotational biasing force of the spring member 5 acting on the pulley arm 2, the pulley arm 2 rotates in a direction that causes the stopper 4 to move away from the rail R. When the tension of the wire saw acting on the pulley 3 becomes less than the rotational biasing force of the spring member 5 acting on the pulley arm 2, the pulley arm 2 is elastically returned by the spring member 5, and the stopper 4 is pressed against the rail R, and the pulley 3 automatically follows the pulling of the wire saw by the drive unit. For further details, please refer to Japanese Patent Publication No. 2022-70671.

[0033] As shown in Figure 7, the dust collection port 7 is attached to the pulley unit P by the mounting unit 8 as previously described. A portion of the outer circumference of the pulley 3 is inserted into the cylindrical portion 71 of the dust collection port 7 through the slit 710 of the cylindrical portion 71, so that the cylindrical portion 71 is positioned close to the pulley unit P, and the suction port 70 of the cylindrical portion 71 is positioned close to the cutting end of the dust from the workpiece to be cut, and opposite to the direction in which the wire saw W is pulled out from the cutting end of the dust. In this way, the wire saw W pulled out from the cutting end of the dust from the workpiece to be cut is inserted into the cylindrical portion 71 through the suction port 70 of the cylindrical portion 71 and extends out of the cylindrical portion 71 through the slit 710. The dust collection port 7 is provided at the end of a dust collection hose extending from the dust collection device body, as in the conventional method. In the case of this dust collection port 7, the connecting port 72 at the other end of the cylindrical portion 71 is press-fitted into the end of the dust collection hose to connect and fix it.

[0034] As shown in Figure 8, the wire saw machine M using the pulley unit P with dust collection port 7 comprises a drive unit M11 of the main body, a pair of rails R installed in parallel on both sides of the object to be cut, a pair of follow-type pulley units P installed movably on each rail R, and a wire saw W extending from the drive unit M11 around which each pulley unit P is wound. The wire saw W between each pulley unit P is wound around the object to be cut, and the drive unit M11 is driven to rotate and pull the wire saw W, while moving each pulley unit P on each rail R to cut the object. In this case, the pair of follow-type pulley units P move in approximately the same position on both sides of the object to be cut, resulting in a pull-cut type. For further details, please refer to Japanese Patent Publication No. 2022-70671.

[0035] In this wire saw machine M, the dust collection port 7 is positioned so that its suction port 70 is close to the end of the cutting process from which dust is drawn out of the workpiece, and opposite to the direction in which the wire saw W is drawn out from the end of the cutting process. As the wire saw W cuts through the workpiece, the dust collection port 7 (suction port 70) moves along each rail R together with each pulley unit P, sucking up the dust. In this case, the dust collection operation is performed automatically in conjunction with the pulley unit P without the use of any special driving means. Furthermore, in this case, the suction port 70 of the dust collection port 7 is expanded on the side opposite to the slit 710, and the side of the circumferential surface opposite to the slit 710 is extended in a triangular pyramidal shape. The wire saw W passes through the triangular pyramidal passage of the cylindrical section 71 from the expanded part of the suction port 70, and the dust cut from the workpiece by the wire saw W and scattered in the direction in which the wire saw W is drawn out is sucked and guided through the triangular pyramidal passage of the cylindrical section 71 from the expanded part of the suction port 70 and sent to the dust collection hose. This ensures that dust generated from the object being cut is reliably sucked up by the dust collection port 7, resulting in significantly less dust loss.

[0036] As explained above, in this dust collection port 7, as previously described, the cylindrical portion 71 is supported by a mounting unit 8 that is connected to the support shaft 31 and extends from the support shaft 31 parallel to the pulley 3, and a part of the outer circumference of the pulley 3 is inserted into the cylindrical portion 71 through the slit 710 of the cylindrical portion 71, so that the cylindrical portion 71 is positioned close to the pulley unit P, and the suction port 70 of the cylindrical portion 71 is positioned close to the cutting end of the dust from the object to be cut and opposite to the direction in which the wire saw W is pulled out from the cutting end of the dust from the object to be cut, so that the wire saw W pulled out from the cutting end of the dust from the object to be cut is inserted into the cylindrical portion 71 through the suction port 70 of the cylindrical portion 71 and extends out of the cylindrical portion 71 through the slit 710. By positioning the dust collection port 7 close to the pulley unit P and linking it with the pulley unit P, the dust collection port 7 can automatically and reliably collect dust generated from the object being cut. This automation of dust collection reduces the workload on the worker and ensures safety. In other words, unlike in the past, there is no need to perform the cumbersome tasks of checking the position of the dust collection port 7 or changing the support and fixing position of the dust collection port 7 while the wire saw W is cutting the object. This reduces the workload on the worker in dust collection, significantly reducing the overall workload. Furthermore, since the worker does not need to work as close to the wire saw machine M, worker safety is also fully ensured.

[0037] Furthermore, the structure including the mounting unit 8 for the dust collection port 7 significantly improves dust collection efficiency, and dust collection loss can be drastically reduced compared to conventional methods. In other words, while the wire saw W is cutting the object to be cut, the position of the cutting end of the dust from the object to be cut and the position of the dust collection port 7 are always aligned, so dust collection loss by the dust collection port 7 is eliminated or significantly reduced, and the amount of dust scattered at the work site is drastically reduced compared to conventional methods, and the burden of cleaning up dust during or after cutting the object to be cut can be drastically reduced compared to conventional methods. In addition, this significant reduction in dust collection loss also greatly reduces the risk of dust exposure to workers, and in this respect as well, worker safety can be fully ensured.

[0038] Furthermore, this dust collection port 7 has the following advantages: (1) The cylindrical portion 71 is separate from the dust collection hose and has a suction port 70 at one end and a connecting port 72 at the other end that can be attached to the tip of the dust collection hose. A slit 710 is cut out from the circumferential surface of the cylindrical portion 71 in the axial direction from one end and is provided to be attached to the tip of the dust collection hose in a detachable manner. This simplifies the structure of the dust collection port 7, making it easy to attach it to the pulley unit P by the mounting unit 8, and also allows the dust collection port 7 to be manufactured at low cost. (2) The suction port 70 of the cylindrical portion 71 is expanded on the side opposite to the slit 710, and the side of the circumferential surface of the cylindrical portion 71 opposite to the slit 710 protrudes in a triangular pyramidal shape, so that dust can be reliably sucked up with the simple structure of the dust collection port 7. (3) The mounting unit 8 has a rod guide 81 that extends parallel to the pulley 3 at the tip of the support shaft 31 of the pulley unit P and is attached to the support shaft 31 in any direction around its circumference, and a support rod 82 that is attached to the rod guide 81 so as to be slidable in the direction in which it extends and so as to be fixed in any sliding position and extends from the rod guide 81 parallel to the pulley 3 and outward from the outer circumference of the pulley 3, and the cylindrical portion 71 is attached to the support rod 82, so that the mounting unit 8 has a simple structure, the dust collection port 7 can be easily attached to the pulley unit P, and the mounting unit 8 can be manufactured at low cost. (4) In particular, the mounting unit 8 includes a rod guide 81 that extends parallel to the pulley 3 at the tip of the support shaft 31 of the pulley unit P and is mounted in any direction in the circumferential direction of the support shaft 31, a support rod 82 that is slidably engaged with the rod guide 81 in the direction in which it extends and is mounted so as to be fixed in any sliding position and extends from the rod guide 81 parallel to the pulley 3 and outward from the outer circumference of the pulley 3, a mounting rod 83 that extends from the support rod 82 parallel to the support shaft 31 on the outer circumference of the pulley 3, and the other end of the cylindrical portion 71 The mounting unit 8 has a mounting portion 84 provided on the side, which is slidably engaged with the mounting rod 83, and the cylindrical portion 71 is fixed in a sliding position where the slit 710 faces the outer surface of the pulley 3, and a part of the outer circumference of the pulley 3 can be inserted into the cylindrical portion 71 through the slit 710. Since the cylindrical portion 71 is attached to the mounting rod 83 via the mounting portion 84, the mounting unit 8 has a simpler structure, the dust collection port 7 can be easily attached by the pulley unit P, and the mounting unit 8 can be manufactured at a low cost.

[0039] Furthermore, by combining this dust collection port 7 with the aforementioned follow-type pulley unit P and mounting it on the wire saw machine W, the effectiveness of both the cutting operation of the object to be cut and the dust collection operation of the wire saw machine W can be significantly improved.

[0040] In this embodiment, a wire saw machine M using a pulley unit P with a dust collection port 7 is shown as an example of a pull-cut type in which a pair of follow-type pulley units P move in approximately the same position on both sides of the workpiece to be cut. However, even in a push-cut type in which a pair of follow-type pulley units move in different positions front and back on both sides of the workpiece to be cut, the same dust collection port can be attached to the pulley unit using the same mounting unit and used in the same way. In this case, the wire saw is wound from the leading pulley to the trailing pulley, and the direction in which the wire saw is drawn from the cutting end of the dust from the workpiece to be cut changes. In this case, the mounting angle of the rod guide on the support shaft can be changed to rotate and displace the support rod toward the direction closer to the workpiece to be cut, and the suction port of the dust collection port can be brought closer to the cutting end of the dust from the workpiece to be cut and opposite to the direction in which the wire saw is drawn. Alternatively, the mounting of the dust collection port can be made easier by modifying the mounting unit to be used for push-cutting.

[0041] In this case, the mounting unit can be fixed to the connecting portion (square pipe) of the mounting rod by tilting the mounting portion (square pipe) to the required angle. By doing so, as shown in Figure 9, after attaching the mounting unit 8 to the pulley unit P, the mounting portion 84 of the dust collection port 7 can be fitted and attached to the mounting portion 831 of the mounting rod 83 of the mounting unit 8 in accordance with its tilt, so that the dust collection port 7 after being attached to the mounting rod 83 is tilted to the required angle, and the suction port 70 of the dust collection port 7 can be positioned close to the cutting end of the dust from the object to be cut and facing the direction in which the wire saw is pulled out from this end.

[0042] In this way, the mounting unit 8 can be attached to the pulley unit P, and the dust collection port 7 can be attached to the mounting unit 8, respectively, in the same manner as in the above embodiment. Therefore, even if the pair of follow-type pulley units P are of the push-cut type, the same dust collection port 7 as above can be attached to the pulley unit P using a mounting unit that has been slightly modified from the above mounting unit 8, and used in the same manner. This method also produces the same effects and advantages as the above embodiment.

[0043] In the case of this push-cut type, the cylindrical portion 71 of the dust collection port 7 may be a simple cylindrical or rectangular shape, as shown in Figures 10 and 11.

[0044] Furthermore, although this embodiment illustrates the attachment of the dust collection port to a follow-type pulley unit, the dust collection port can also be attached in the same manner to a self-propelled pulley unit that is equipped with wheels rotated by a motor or other power source and is movable on rails, and by attaching this dust collection port, the same effects and advantages as in the above embodiment can be achieved. [Explanation of Symbols]

[0045] R Rail M Wire Saw Machine M1 Wire Saw Machine Body (Main Unit) M11 Drive Unit W Wire Saw P Follow-up pulley unit 1 Pulley base 2 Pulley arms 211 Rotary shaft 3 Pulley 31 Spindle 311 Shaft 312 heads 32 colors 4 Stoppers 5. Spring component (coil spring) 7 Dust collection port 70 Suction port 71 Cylinder part 710 Slit 72 Connection port 8 Mounting Unit 81 Rod Guides 810 Pivot shaft insertion hole 811 Mounting Plate 812 Guide 813 screw holes S1 screw 82 Support rod 821 Extension Rod 83 Mounting Rod 830 Connection section 830a screw hole 831 Mounting part S2 screw 84 Mounting part

Claims

1. A dust collection port comprising a cylindrical portion having a suction port at its tip, provided at the end of a dust collection hose extending from a dust collection device, movably positioned on a rail installed near the object to be cut, and positioned close to a pulley unit having a support shaft and pulley around which the wire saw extending from the drive unit of the wire saw machine body is wound and which moves together with the pulling of the wire saw by the drive unit, and which collects dust at the cutting end of the dust that is cut by the wire saw of the object to be cut and pulled out together with the wire saw, The circumferential surface of the cylindrical portion has a slit that allows a portion of the outer circumference of the pulley to be inserted from the tip in an axial direction, the suction port of the cylindrical portion is expanded on the side opposite to the slit, and the surface of the circumferential surface of the cylindrical portion opposite to the slit protrudes in a triangular pyramidal shape, The cylindrical portion is supported by a mounting unit connected to the support shaft and extending parallel to the pulley from the support shaft, with a portion of the outer circumference of the pulley inserted into the cylindrical portion through the slit in the cylindrical portion, so that the cylindrical portion is positioned close to the pulley unit, and the suction port of the cylindrical portion is positioned close to the cutting end of the dust from the object to be cut, and opposite to the direction in which the wire saw is pulled out from the cutting end of the dust. The wire saw, which is drawn out from the cutting end of the dust of the object to be cut, is inserted into the cylindrical part through the expanded suction port of the cylindrical part, with the side opposite the slit protruding in a triangular pyramidal shape, and extends out of the cylindrical part from the slit. A dust collection port characterized by the following features.

2. The dust collection port according to claim 1, wherein the cylindrical portion is separate from the dust collection hose, has a suction port at one end, and has a connecting port at the other end that is detachable from the tip of the dust collection hose, and a slit is cut out from the circumferential surface of the cylindrical portion in the axial direction from one end, and is detachably provided at the tip of the dust collection hose.

3. The dust collection port according to claim 1 or 2, wherein the mounting unit comprises a rod guide extending parallel to the pulley on the support shaft of the pulley unit and mounted in any direction in the circumferential direction of the support shaft, and a support rod slidably engaged with the rod guide in the direction of its extension and fixed in any sliding position, and extending parallel to the pulley from the rod guide to the outside of the outer circumference of the pulley, and the cylindrical portion is attached to the support rod.

4. The mounting unit comprises: a rod guide extending parallel to the pulley on the support shaft of the pulley unit and mounted in any direction in the circumferential direction of the support shaft; a support rod slidably engaged with the rod guide in the direction of its extension and fixed in any sliding position, extending from the rod guide parallel to the pulley and to the outside of the outer circumference of the pulley; a mounting rod extending from the support rod parallel to the support shaft on the outside of the outer circumference of the pulley; and a mounting portion provided on the other end of the cylindrical portion, slidably engaged with the mounting rod, and fixed in a sliding position where the cylindrical portion is inserted into the cylindrical portion through the slit, with the slit facing the outer circumferential surface of the pulley, and the cylindrical portion being attached to the mounting rod via the mounting portion, wherein the cylindrical portion is attached to the mounting rod via the mounting portion.

5. The pulley unit comprises a pulley base movably positioned on a rail, a pulley arm rotatably supported on the pulley base via a pivot shaft, a pulley rotatably supported on one end of the pulley arm via a pivot shaft parallel to the pulley arm, a stopper provided on the other end of the pulley arm so as to be able to contact and separate from the rail by the rotation of the pulley arm, and a spring member that biases the other end of the pulley arm toward the rail and presses the stopper against the rail in its normal position, wherein the wire saw is wrapped around the object to be cut and the wire saw cuts the object to be cut by the drive unit, the wire saw is driven A dust collection port according to claim 1 or 2, which is employed in a follow-type pulley unit, wherein when the tension of the wire saw acting on the pulley, which is pulled by a moving part, becomes greater than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm rotates in a direction in which the stopper moves away from the rail, and when the tension of the wire saw acting on the pulley becomes less than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm is elastically returned by the spring member so that the stopper is pressed against the rail, and the pulley is a follow-type that automatically follows the pulling of the wire saw by the drive unit.

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