JP5385164B2 - Cutting machine - Google Patents

Description

  The present invention relates to a cutting machine capable of adjusting a cutting depth of the rotary blade with respect to the material to be cut by changing an amount of protrusion of the rotary blade with respect to a base abutted against the material to be cut.

  For example, in Patent Document 1, a shielding plate is provided in the casing from the dust generating portion of the opening that opens downward in the casing to the dust inlet connected to the dust collecting device. There is disclosed a cutter with a dust suction port in which an area of a suction port that opens in a dust generating portion of an air passage formed by the casing is smaller than an area of the air passage of the dust suction port.

  According to the cutter with the dust suction port of Patent Document 1, the area of the suction port is smaller than the area of the air passage of the dust suction port. Even if the flow is slow, the flow of air sucked into the suction port becomes extremely fast. Therefore, all the dust generated during the cutting operation can be sucked from the suction port and collected in the dust collector without losing the air flow generated by the rotation of the cutter that cuts the workpiece. .

JP 2001-30232 A

  By the way, in a cutting machine provided with a dust collecting passage as represented by the above cutter with a dust suction port, the rotary blade is covered by a fixed cover supported on a base that comes into contact with the material to be cut, and On the other hand, there is one in which the cutting depth of the rotary blade with respect to the material to be cut can be adjusted by changing the protrusion amount of the rotary blade protruding downward.

  In the above cutting machine, as the protrusion amount is increased, the rotary blade moves away from the dust collection passage, so that a gap may be formed between the rotary blade and the dust collection passage. In such a case, part of the dust generated when the rotary blade is cut into the material to be cut may enter the fixed cover through the gap instead of the dust collection passage. For this reason, when a clearance gap arises between a rotary blade and a dust collection channel | path, all the said dusts cannot be guide | induced to a dust collection channel | path, and there was a concern that the dust collection efficiency of a cutting machine might fall.

  The present invention has been proposed in view of such a situation, and even when the depth at which the rotary blade is cut into the material to be cut is changed, cutting capable of preventing the dust collection efficiency from being lowered. The purpose is to provide a machine.

  The cutting machine according to the first aspect of the present invention is a dust collection passage that is supported on a base that is in contact with a material to be cut and covers a rotary blade, and that is adjacent to the fixed cover and communicates with the outside of the fixed cover. In a cutting machine capable of adjusting the cutting depth of the rotary blade with respect to the material to be cut by changing the amount of protrusion that protrudes the rotary blade downward relative to the base, in conjunction with the amount of protrusion, A closing body that closes a first gap between the rotary blade and the dust collecting passage in the fixed cover is provided.

  The invention according to claim 2 is the tilting body according to claim 1, wherein the closing body is tiltable toward the base when the protruding amount is changed while the rotary blade is rotatably held in the fixed cover. An inclined surface that is inclined in the tangential direction of the rotary blade from the rotary blade toward the dust collecting passage and closes the first gap, and a front end of the inclined surface. A V-shape comprising a folded surface capable of closing a second gap between the dust collection passage and the fixed cover in the dust collection passage by folding the side toward the rotary blade. To do.

According to the cutting machine of the first aspect of the present invention, even in the case where the projection amount is changed to change the depth at which the rotary blade is cut into the material to be cut, the closure body causes the The first gap can be closed. Thereby, the dust generated when the rotary blade is cut into the material to be cut can be guided to the dust collection passage without passing through the first gap, and the dust collection efficiency can be prevented from being lowered. .
According to the invention of claim 2, when dust is generated when the rotary blade is cut into the material to be cut while changing the protrusion amount, the first gap is blocked by the inclined portion. Thus, the dust can be easily guided to the dust collection passage along the upward slope of the inclined portion. In addition, since the second gap is closed by the folded surface, it is possible to prevent dust guided to the dust collection passage from entering the fixed cover through the second gap.

It is the figure which showed the state before the diamond cutter with which the cutter of embodiment of this invention is provided is cut into a stone material. It is the figure which showed the state by which the diamond cutter was cut into the stone material. It is the figure which showed the state before the diamond cutter with which the cutter of other embodiment is provided is cut into a stone material. It is the figure which showed the state by which the diamond cutter of other embodiment was cut into the stone material.

  An embodiment of the present invention will be described with reference to FIGS. 1 and 2. The cutter 1 shown in FIGS. 1 and 2 includes a base 10, a fixed cover 20, a dust collection passage 30, and a motor housing case 40. The cutter 1 is an example of a cutting machine according to the present invention.

  The base 10 is formed in a square shape by a metal plate. For example, the base 10 is used so as to come into surface contact with the upper surface of a stone material W (see FIG. 2). An opening 11 is provided in the base 10, and a diamond cutter 21 described later can be protruded below the base 10 through the opening 11 as shown in FIG. 2. The fixed cover 20 is fixed to the upper surface of the base 10 by screws (not shown). The stone material W is an example of the material to be cut of the present invention.

  A disk-shaped diamond cutter 21 and a cutter frame 25 are arranged inside the fixed cover 20. A spindle 22 to which the rotation of the motor M is transmitted protrudes from the motor housing case 40 (motor housing portion 41) described later into the fixed cover 20. The diamond cutter 21 is attached to the spindle 22 in a posture perpendicular to the base 10. As the motor M rotates and the spindle 22 rotates, the diamond cutter 21 is driven to rotate.

  The cutter frame 25 is tiltable so as to move up and down with respect to the base 10 about the rotation fulcrum shaft 26. A gear case (not shown) that is attached to the front side of the motor M and incorporates a reduction device for the motor M is sandwiched between the cutter frame 25. The spindle 22 projects from the cutter frame 25 toward the inside of the fixed cover 20. Therefore, by tilting the cutter frame 25, the diamond cutter 21 attached to the spindle 22 can be moved up and down with respect to the stone material W that contacts the lower surface of the base 10 while being rotatable by the spindle 22. . Thus, the amount of the diamond cutter 21 protruding downward from the base 10 through the opening 11 (hereinafter referred to as the protrusion amount) is changed, and the cutting depth of the diamond cutter 21 with respect to the stone material W can be adjusted. The cutter frame 25 is an example of a tilting body according to the present invention.

  A metal V-shaped closing plate 28 is fixed to the cutter frame 25. For this reason, the V-shaped closing plate 28 can be tilted integrally with the cutter frame 25 in conjunction with the tilt of the cutter frame 25. As shown in FIGS. 1 and 2, the V-shaped closing plate 28 has an inclined surface 28A and a folded surface 28B.

  As shown in FIG. 1, when the diamond cutter 21 is accommodated in the fixed cover 20 by the cutter frame 25 without protruding downward from the base 10, the inclined surface 28 </ b> A is separated from the diamond cutter 21 by the collection described later. It is located so as to incline upward toward the dust passage 30. At this time, as shown in FIG. 1, the inclined surface 28 </ b> A closes the gap G <b> 1 between the fixed cover 20 and the dust collection passage 30 in the fixed cover 20. In the present embodiment, the upward inclination direction of the inclined surface 28A is made substantially the same as the direction of the tangent line that touches the blade edge at the position where the blade edge of the diamond cutter 21 intersects the lower surface of the base 10. The V-shaped closing plate 28 is an example of the closing body of the present invention, and the gap G1 is an example of the first gap of the present invention.

  The folded surface 28 </ b> B was formed by folding the front end side of the inclined surface 28 </ b> A in the V-shaped closing plate 28 toward the diamond cutter 21. As shown in FIG. 1, the folded surface 28 </ b> B closes a gap G <b> 2 between the dust collection passage 30 and the fixed cover 20 in the dust collection passage 30. The gap G2 is an example of the second gap of the present invention.

  Further, even when the cutter frame 25 is moved so as to approach the base 10 around the rotation fulcrum shaft 26 and the diamond cutter 21 protrudes from the base 10 as shown in FIG. 28A is positioned so as to incline upward from the diamond cutter 21 toward the dust collecting passage 30. At this time, the inclined surface 28 </ b> A closes the gap G <b> 11 between the fixed cover 20 and the dust collecting passage 30 in the fixed cover 20 as in the case shown in FIG. 1. Here, the upward inclination direction of the inclined surface 28 </ b> A is substantially the same as the tangential direction that touches the blade edge at a position where the blade edge of the diamond cutter 21 near the dust collection passage 30 intersects the lower surface of the base 10. The gap G11 is an example of the first gap of the present invention.

  In addition, even when the diamond cutter 21 is protruded from the base 10, the vicinity of the folded portion of the folded surface 28B is fixed to the dust collecting passage 30 in the dust collecting passage 30, as shown in FIG. The gap between the cover 20 and the cover 20 is closed.

  A cover body (not shown) is attached to the fixed cover 20. The cover body faces the cutter frame 25 with the diamond cutter 21 interposed therebetween, and can be opened and closed with respect to the fixed cover 20 by a rotation fulcrum shaft. The diamond cutter 21 can be easily replaced by opening the cover body.

  The dust collection passage 30 is located in front of the fixed cover 20 (on the right side in FIGS. 1 and 2) so as to be adjacent to the fixed cover 20. The inner wall of the dust collection passage 30 is formed so as to be integrated with the inner wall of the fixed cover 20. For this reason, the dust collection passage 30 communicates with the fixed cover 20. Further, a discharge port 31 is opened at the upper end of the dust collection passage 30. Thereby, the fixed cover 20 communicates with the outside of the fixed cover 20 via the dust collection passage 30. A dust collector hose or the like is connected to the discharge port 31. Dust and the like generated when the stone material 21 is cut by the diamond cutter 21 are collected by the dust collector through the opening 11 and the dust collecting passage 30.

  The motor housing case 40 includes a motor housing portion 41 and a grip portion 45. The gear case and the like described above are attached to the distal end side of the motor housing portion 41. The gear case attached to the front end side of the motor accommodating portion 41 is sandwiched by the cutter frame 25 so as to move up and down with respect to the base 10. The cutter frame 25 can be fixed at an arbitrary position with respect to the fixed cover 20 by being pressed by a screw-type stopper 42.

  The grip portion 45 is fixed above the motor housing portion 41. The operator operates the cutter 1 by gripping the grip portion 45 with his / her hand. A cord (electric wire) 46 is connected to the rear end side of the grip portion 45. The cord 46 supplies power for operating the motor M.

  Next, operation | movement of the cutter 1 of this embodiment is demonstrated. The operator turns on the operation start switch of the cutter 1, holds the grip portion 45 with his hand, pushes it down toward the base 10, and moves the motor housing portion 41 so as to approach the base 10. At this time, the cutter frame 25 tilts so as to approach the base 10 around the rotation fulcrum shaft 26. In this way, the operator changes the protrusion amount while rotating the diamond cutter 21, and cuts the stone material W by cutting it into the stone material W as shown in FIG.

  When the stone material W is cut by the diamond cutter 21, dust or the like is generated from the cutting point W1. As indicated by the dotted line arrow in FIG. 2, most of the dust generated from the cutting point W1 passes through the opening 11 and moves in the direction of the tangent line, and then passes through the dust collection passage 30 to the discharge port. Reach 31. Thereafter, dust is sucked and collected outside the fixed cover 20 by the dust collector.

  When the dust moves in the tangential direction, an inclined wall from the diamond cutter 21 toward the dust collecting passage 30 is formed in the gap G11 by the inclined surface 28A as shown in FIG. Thereby, the dust generated from the cutting point W1 is easily guided to the dust collecting passage 30 along the upward inclination of the inclined surface 28A. In addition, as shown by other dotted arrows in FIG. 2, the inclined surface is also formed when the cutting piece (pebbles) generated from the cutting point W <b> 1 collides with the inner wall of the dust collecting passage 30 and moves toward the fixed cover 20 side. By 28A, the cutting piece can be reflected and directed toward the dust collecting passage 30.

  Further, as described above, the gap G11 is blocked by the inclined surface 28A, so that dust and cutting pieces generated from the cutting point W1 can be prevented from entering the fixed cover 20. In addition, as described above, the gap between the dust collection passage 30 and the fixed cover 20 in the dust collection passage 30 is closed by the vicinity of the folded portion of the folding surface 28B. Thereby, it is possible to prevent dust and cutting pieces guided to the dust collection passage 30 from entering the fixed cover 20 through the gap.

  Here, the operation of cutting the stone material W by cutting the diamond material 21 into the stone material W has been described with reference to FIG. 2, but the diamond cutter 21 is changed to a protrusion amount different from that in FIG. Even when cutting into the stone material W, the V-shaped closing plate 28 fixed to the cutter frame 25 is tilted so as to move up and down relative to the base 10 in conjunction with the protruding amount. When the V-shaped closing plate 28 is tilted, the inclined surface 28A is a gap between the fixed cover 20 and the dust collecting passage 30 in the fixed cover 20, as in the case shown in FIGS. And the folded surface 28 </ b> B closes the gap between the dust collection passage 30 and the fixed cover 20 in the dust collection passage 30.

  In addition, in this embodiment, the diamond cutter 21 protrudes from the base 10 rather than when the diamond cutter 21 is accommodated in the fixed cover 20 without protruding downward from the base 10 (state of FIG. 1). When the state (the state of FIG. 2) is set, the dimension between the inclined surface 28A formed in the direction perpendicular to the tangential direction and the inner wall of the dust collecting passage 30 is widened. Thereby, it becomes easy to guide the dust generated from the cutting point W <b> 1 toward the dust collection passage 30.

<Effect of this embodiment>
In the cutter 1 of the present embodiment, as described above and shown in FIGS. 1 and 2, the inclined surface 28 </ b> A of the V-shaped closing plate 28 is connected to the fixed cover 20 in the fixed cover 20 in conjunction with the protruding amount. The gaps G1 and G11 between the dust collection passage 30 are closed. For this reason, even if it is a case where the protrusion amount is changed and the depth at which the diamond cutter 21 is cut into the stone material W is changed, the gap G11 and the like can be closed by the inclined surface 28A. Thereby, when the diamond cutter 21 is cut into the stone material W, dust or the like generated from the cutting point W1 can be easily guided to the dust collecting passage 30 without passing through the gap G11 or the like. Therefore, it is possible to easily collect dust or the like generated from the cutting point W1 through the dust collection passage 30 and from the discharge port 31 by using the dust collector. Therefore, it can prevent that the efficiency which collects the said dust etc. falls.

  Further, as described above and shown in FIGS. 1 and 2, when the V-shaped closing plate 28 tilts in conjunction with the protrusion amount, the inclined surface 28A closes the gaps G1 and G11, and the folded surface 28B. However, the gap G2 between the dust collection passage 30 and the fixed cover 20 in the dust collection passage 30 is closed. For this reason, when the diamond cutter 21 is cut into the stone material W while changing the protruding amount, when dust or the like is generated from the cutting point W1, the fixed cover 20 in the fixed cover 20 is formed by the inclined surface 28A. It is possible to easily guide dust or the like to the dust collection passage 30 along the upward slope of the inclined surface 28A after the gap G11 between the dust collection passage 30 and the like is closed. In addition, when the folded surface 28B closes the gap G2 or the like, dust or the like guided to the dust collection passage 30 can be prevented from entering the fixed cover 20 through the gap G2 or the like.

  The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. For example, as in the cutter 1A shown in FIGS. 3 and 4, instead of the V-shaped closing plate 28, one end side is fixed to the inner wall of the fixed cover 20, and the other end side is fixed to the cutter frame 25 to be a bellows. The gap G21 between the diamond cutter 21 and the dust collecting passage 30 in the fixed cover 20 may be blocked by the closing elastic body (rubber or the like) 29 bent in a shape in conjunction with the protrusion amount. .

  In the embodiment shown in FIG. 4, as in the embodiment shown in FIG. 2, the operator moves the cutter frame 25 closer to the base 10 by pushing down the motor housing 41 toward the base 10. Then, the other end side of the closing elastic body 29 is pulled. As a result, the closing elastic body 29 is positioned so as to incline upward from the diamond cutter 21 toward the dust collection passage 30 in a state where the closing elastic body 29 is extended to close the gap G21. Here, the upward inclination direction of the closing elastic body 29 is substantially the same as the direction of the tangent line as in the case described above and shown in FIG. As a result, as in the embodiment shown in FIG. 2, it is possible to easily guide dust and cutting pieces generated from the cutting point W <b> 1 to the dust collecting passage 30 along the closing elastic body 29. A cutting piece can be prevented from entering the fixed cover 20 through the gap G21 or the like.

  Further, instead of the V-shaped closing plate 28 shown in FIGS. 1 and 2, a metal block body having V-shaped surfaces corresponding to the inclined surface 28A and the folded surface 28B, respectively, the gap G1, G2, G11, G21, etc. may be closed.

  Furthermore, in the embodiment shown in FIGS. 1 and 2, a metal member is used as the V-shaped closing plate 28, but a member formed by an elastic body such as rubber may be used.

  In addition, in each embodiment mentioned above, although the example which cuts a stone material with the diamond cutter 21 was shown, it is not limited to this, You may make it cut concrete, a tile, etc. FIG.

  1, 1A ·· Cutter, 10 ·· Base, 20 ·· Fixed cover, 21 ·· Diamond cutter, 25 ·· Cutter frame, 28 ·· V-shaped closing plate, 28A ·· Inclined surface, 28B ·· Folded surface, 30 ... Dust collection passage, G1, G11, G21 ... Gap between diamond cutter and dust collection passage in fixed cover, G2 ... Gap between dust collection passage and fixed cover in dust collection passage, W ・ ・ Stone

Claims (2)

A fixed cover that is supported on the base that is in contact with the material to be cut and covers the rotary blade is provided with a dust collection passage that is adjacent to the fixed cover and communicates with the outside of the fixed cover. In a cutting machine capable of adjusting the cutting depth of the rotary blade relative to the material to be cut by changing the amount of protrusion protruding downward,
A cutting machine comprising a closing body that closes the first gap between the rotary blade and the dust collecting passage in the fixed cover in conjunction with the protruding amount. The closing body is provided in a tilting body that can tilt toward the base when changing the protrusion amount while rotatably holding the rotary blade in the fixed cover,
An inclined surface that inclines and inclines in the tangential direction of the rotary blade from the rotary blade toward the dust collecting passage to close the first gap, and the front end side of the inclined surface rotates on the front end side. 2. A V-shape comprising a folded surface that can be folded back toward the blade to close the second gap between the dust collecting passage and the fixed cover in the dust collecting passage. Cutting machine as described in.

Images