Dust collection device, dust collection method, cutting device, and cutting method

Abstract

To provide a dust collecting device, a dust collecting method, a cutting device and a cutting method which can surely and safely prevent scattering of chip and dust generated during drilling work, and can be adapted to bits of various lengths.SOLUTION: A pair of pedestal members 110 are arranged at positions facing each other across a central axis of a recess formed in a wall body 500, and a cover part 120 is made of a box body and has an opening on a side where a cutting tool 210 cuts the wall body 500, an insertion hole 122 through which the cutting tool 210 can be inserted to enable cutting of the wall body 500, and a suction hole 123 to which a suction hose connected to a suction device for sucking up dust is connected, and the opening is closed so that the pedestal member 110 and the cover part 120 arranged on the wall body 500 are adsorbed by adsorption means 130.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dust collection device, a dust collection method, a cutting device, and a cutting method, and more particularly to a dust collection device, a dust collection method, a cutting device, and a cutting method that collect dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess. [Background technology]

[0002] Core drills have been known as tools for drilling holes in concrete walls and floors. A core drill is equipped with a bit having, for example, a cylindrical diamond cutting edge, and excavates and drills holes in the concrete wall or floor by rotating the bit at high speed.

[0003] When a core drill is used to drill holes in concrete walls or floors, the bit excavates the concrete, generating chips and dust. The scattering of chips and dust must be kept to a minimum, not only to protect the working environment for workers, but also to protect the living environment for nearby residents and passersby.

[0004] Therefore, an electric tool has been disclosed that can prevent chips and dust from flying by attaching a bellows-shaped dust collection cover to the tip of the core drill and surrounding the bit attached to the tip of the core drill (see, for example, Patent Document 1).

[0005] FIG. 6 is a diagram showing the power tool and the dust collecting device disclosed in Patent Document 1. As shown in FIG. 6, the power tool 10 disclosed in Patent Document 1 includes a power tool body 11, a bit 12, and a dust collection cover 13.

[0006] The cylindrical dust collection cover 13, which is made of a flexible material and formed in a bellows shape, is capable of expanding and contracting along its entire length, and surrounds the bit 12 while maintaining a constant space between the bit 12 and the inner surface of the dust collection cover 13. In addition, the base end side of the dust collection cover 13 is connected to the power tool body 11, and the tip end side of the dust collection cover 13 abuts against the wall surface or the like to be drilled, so that chips and dust generated during the drilling operation can be contained inside the dust collection cover 13.

[0007] Furthermore, the dust collection cover 13 is provided with a coil member inside to extend the dust collection cover 13, and as the coil member extends, the tip of the dust collection cover 13 comes into contact with the wall surface or the like to be drilled.

[0008] In addition, a cylindrical guide portion 13A connected to the power tool body 11 is provided on the base end side of the dust collection cover 13, and the guide portion 13A is designed to enter the inside of the dust collection cover 13 while maintaining a certain space between the bit 12 and the inner surface of the dust collection cover 13.

[0009] The operator supports the power tool body 11 with one hand and retracts the dust collection cover 13 along the outer peripheral surface of the guide portion 13A with the other hand, thereby exposing the tip of the bit 12 from the dust collection cover 13. This allows the operator to align the tip of the bit 12 exposed from the dust collection cover 13 with the drilling position.

[0010] Furthermore, with the tip of the bit 12 exposed from the dust collection cover 13 aligned with the drilling position, loosening the dust collection cover 13 that has been retracted with the other hand along the outer circumferential surface of the guide portion 13A will cause the coil member inside the dust collection cover 13 to expand, causing the tip of the dust collection cover 13 to abut against the wall surface or other portion to be drilled. This surrounds the drilling position between the dust collection cover 13 and the power tool body 11, preventing chips and dust generated during the drilling operation from scattering.

[0011] Furthermore, the guide portion 13A provided on the base end side of the dust collection cover 13 is provided with a discharge hole for discharging the dust inside the dust collection cover 13 to the outside, and by using a suction device connected to the discharge hole via a discharge hose to suck in the dust, chips and dust generated in the dust collection cover 13 during the drilling operation can be discharged to the outside through the discharge hole. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Patent Publication No. 2008-272909 Summary of the Invention [Problem to be solved by the invention]

[0013] However, the power tool disclosed in Patent Document 1 cannot reliably prevent chips and dust from scattering. Specifically, in the power tool disclosed in Patent Document 1, the tip of the dust collection cover 13 abuts against the wall surface or the like to be drilled, and the tip of the dust collection cover 13 is closed, thereby preventing chips and dust from leaking to the outside from the tip side of the dust collection cover 13. However, if a gap is formed between the tip of the dust collection cover 13 and the wall surface, there is a problem that chips and dust will leak to the outside.

[0014] For example, because the dust collection cover 13 is made of a flexible accordion-shaped material, when the dust collection cover 13 is manually compressed along the outer circumferential surface of the guide portion 13A and then loosened, if the tip of the extended dust collection cover 13 bends downward, the tip of the dust collection cover 13 will not be able to properly abut. In other words, a gap will be created between the tip of the dust collection cover 13 and the wall surface that is the target of drilling.

[0015] One solution would be to make the dust collection cover 13 from a rigid material rather than making it flexible, but if it were made from a rigid material, it would be difficult to expand and contract the dust collection cover 13, reducing workability. Furthermore, applying force to expand and contract the dust collection cover 13, which is made from a rigid material, could cause the tip of the bit 12 to shift out of position from the drilling position.

[0016] The dust collection cover 13 in the power tool disclosed in Patent Document 1 is structured so that the internal coil member extends and the tip of the dust collection cover 13 abuts against the wall surface or the like to be drilled, but unless the direction of extension of the coil member is perpendicular to the wall surface to be drilled, the tip of the dust collection cover 13 cannot abut correctly.

[0017] Because the operator supports the power tool body 11 with one hand and the guide part 13A with the other, it is not easy to bring the tip of the dust collection cover 13, which is extended by the coil member provided inside the dust collection cover 13, into perpendicular contact with the wall surface to be drilled, and if a gap occurs between the tip of the dust collection cover 13 and the wall surface to be drilled, chips and dust will leak to the outside.

[0018] Therefore, it is conceivable that a worker other than the worker supporting the power tool body 11 would support the tip of the dust collection cover 13 so that the tip of the dust collection cover 13 is properly abutted against the wall surface being drilled without creating a gap between it and the wall surface being drilled. However, because the bit 12 rotates at high speed at the tip of the dust collection cover 13 during drilling, it is extremely dangerous to hold down the tip of the dust collection cover 13 with one's hand, and such an operation is not practical.

[0019] In addition, in the power tool disclosed in Patent Document 1, the discharge hole provided in the guide portion 13A on the base end side is connected to a suction device via a discharge hose, and when the dust collection cover 13 is extended during drilling work, the suction device sucks in the dust collection cover 13 to discharge chips and dust particles inside the dust collection cover 13 to the outside.

[0020] However, when the dust collection cover 13 is extended, the distance between the discharge hole on the base end side and the drilling position becomes longer, which causes a problem of a decrease in the suction force of the chip and dust suction device due to a loss of pressure inside the extended dust collection cover 13.

[0021] It is conceivable to reduce the pressure loss by shortening the distance between the discharge hole and the drilling position, but because the dust collection cover 13 is configured in a bellows shape, it is difficult to provide a discharge hole in the dust collection cover 13. In other words, the only option is to provide a discharge hole in the guide portion 13A on the base end side.

[0022] Furthermore, the power tool disclosed in Patent Document 1 has the problem that it cannot accommodate bits of various lengths. Specifically, the depth of the hole to be drilled in the wall surface or the like varies depending on the specifications, and to drill a deeper hole, it is necessary to select a bit with a length corresponding to the hole depth in advance, or to connect an extension member to the base end of a bit for forming a short hole and adjust the length of the bit to the hole depth.

[0023] In this case, a dust collection cover is required to surround the bit while maintaining a certain space between the bit and the length corresponding to the depth of the hole. In other words, the dust collection cover 13 in the power tool disclosed in Patent Document 1 cannot accommodate bits of all lengths, and there is a problem in that the dust collection cover must be adapted depending on the depth of the hole to be formed.

[0024] If the dust collection cover is lengthened depending on the depth of the hole to be drilled, the dust collection cover will not be able to withstand its weight and the tip of the dust collection cover will droop. If the tip of the dust collection cover droops, it will not be possible to maintain a constant space between the bit and the inner surface of the dust collection cover, and the bit rotating at high speed may come into contact with the dust collection cover, creating a dangerous situation.

[0025] The present invention has been made in consideration of these points, and aims to provide a dust collection device, dust collection method, cutting device, and cutting method that can reliably and safely prevent the scattering of chips and dust generated during drilling operations, and that can also accommodate bits of various lengths. [Means for solving the problem]

[0026] In order to solve the above problem, the present invention provides a dust collection device that collects dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, characterized by comprising: a pair of flat base members that are attached to the workpiece on either side of the recess to be formed; a cover portion that is a box-shaped body with at least one open side and has an insertion hole through which the cutting tool can be inserted so as to be able to cut the workpiece, and a suction hole that is connected via a suction hose to a suction device for sucking up dust; and an adsorption means that adsorbs the cover portion, with the open side facing the workpiece, and the base member.

[0027] As a result, a pair of flat base members are attached to the workpiece with the recess to be formed between them, and the open side of the cover member, which is a box-shaped body with at least one open side and has an insertion hole through which a cutting tool can be inserted to enable cutting of the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust, is faced towards the workpiece, and the suction means adsorbs the cover member and the base member.

[0028] The present invention also provides a dust collection method for collecting dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, the dust collection method comprising the steps of: attaching a pair of flat base members to the workpiece on either side of the recess to be formed; facing the open side of a cover member, which is a box-shaped body with at least one open side, and which has an insertion hole through which the cutting tool can be inserted so as to be able to cut the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust, toward the workpiece; and adsorbing the cover member and the base member with an adsorption means.

[0029] As a result, a pair of flat base members are attached to the workpiece with the recess to be formed between them, and the open side of the cover member, which is a box-shaped body with at least one open side and has an insertion hole through which a cutting tool can be inserted to enable cutting of the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust, is faced towards the workpiece, and the suction means adsorbs the cover member and the base member.

[0030] The present invention also provides a cutting device equipped with a dust collection device that collects dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, characterized in that the cutting device comprises a pair of flat base members that are attached to the workpiece on either side of the recess to be formed, a cover portion that is a box-shaped body with at least one open side and that has an insertion hole through which the cutting tool can be inserted so as to be able to cut the workpiece, and a suction hole that is connected via a suction hose to a suction device for sucking up dust, and an adsorption means that adsorbs the cover portion, with the open side facing the workpiece, and the base member.

[0031] As a result, a pair of flat base members are attached to the workpiece with the recess to be formed between them, and the open side of the cover member, which is a box-shaped body with at least one open side and has an insertion hole through which a cutting tool can be inserted to enable cutting of the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust, is faced towards the workpiece, and the suction means adsorbs the cover member and the base member.

[0032] The present invention also provides a cutting method using a cutting device equipped with a dust collection device that collects dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, comprising the steps of: attaching a pair of flat base members to the workpiece on either side of the recess to be formed; facing the open side of a cover member, which is a box-shaped body with at least one open side and has an insertion hole through which the cutting tool can be inserted so as to be able to cut the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust, toward the workpiece; and adsorbing the cover member and the base member with an adsorption means.

[0033] As a result, a pair of flat base members are attached to the workpiece with the recess to be formed between them, and the open side of the cover member, which is a box-shaped body with at least one open side and has an insertion hole through which a cutting tool can be inserted to enable cutting of the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust, is faced towards the workpiece, and the suction means adsorbs the cover member and the base member. [Effects of the Invention]

[0034] According to the dust collection device, dust collection method, cutting device, and cutting method of the present invention, a pair of flat base members are attached to the workpiece on either side of the recess to be formed, and the cover member is a box-shaped body with at least one open side, and is equipped with an insertion hole through which a cutting tool can be inserted to enable cutting of the workpiece, and a suction hole connected via a suction hose to a suction device for sucking up dust.The open side of the cover member faces the workpiece, and the suction means adsorbs the cover member and the base member, thereby achieving the following effects.

[0035] The cover part is a box-shaped body with at least one open side, and the open side faces the workpiece. The pair of flat plate-shaped base members attached to the workpiece and the cover part are attached by suction with the suction means, so that the open side is closed by the workpiece. This allows the cover part to cover the part where the cutting tool cuts the workpiece. Furthermore, because the suction means attaches the base member and cover part to each other, there is no need to hold the cover part by hand.

[0036] Furthermore, the suction device uses a suction hose connected to a suction hole in the cover to suck up the cutting dust generated by the cutting tool inside the covered cover, allowing for safe and reliable suction of cutting dust.

[0037] Furthermore, since the box-shaped cover is attached to the base member attached to the workpiece while covering the cutting portion, there is no need to change the size of the cover even if the cutting tool is longer. In other words, it can accommodate cutting tools of various lengths. [Brief explanation of the drawings]

[0038] [Figure 1] 1 is a schematic front view showing the entire dust collecting device according to an embodiment of the present invention. [Figure 2] 1A to 1C are a front view, a rear view, a left side view, a right side view, a plan view, and a bottom view showing details of the cover portion. [Figure 3] 10A and 10B are diagrams showing a process of fixing the base member and the magnetic body M to the wall body. [Figure 4] 10 is a diagram showing a state in which a hole has been formed in a wall body using a cutting device equipped with a core bit, which is a cutting tool, and a dust collecting device. FIG. [Figure 5] 10A and 10B are diagrams showing a process of forming a continuous hole in a wall body using a cutting device equipped with a core bit, which is a cutting tool, and a dust collecting device. [Figure 6] 1 is a diagram showing a power tool and a dust collecting device disclosed in Patent Document 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic front view showing the entire dust collecting device according to the present embodiment. The dust collection device 100 according to this embodiment is a device that collects dust particles generated when a cutting device 200 (not shown here) equipped with a rod-shaped cutting tool rotates a cutting tool 210 (not shown here) to form recesses such as holes, continuous holes, or grooves in a workpiece.

[0040] The following description will be given using an example in which a recess is formed in a wall 500 as the workpiece, but the workpiece is not limited to the wall 500, and a recess may be formed in a floor surface as the workpiece. Also, the description will be given using an example in which a 32 mm core bit is used as the rod-shaped cutting tool 210 to form a hole or continuous holes as a recess in the wall 500, but other cutting tools 210 can be selected, and the shapes of the respective components can be changed accordingly.

[0041] As shown in FIG. 1, the dust collecting device 100 includes a base member 110, a cover portion 120, and an adsorption means . The base member 110 is fixed to the wall body 500 and is used to adsorb the cover portion 120 via the adsorption means 130, and is a pair of flat, planar bodies arranged in opposing positions across the central axis of the hole, which is the recess to be formed in the wall body 500, which is the workpiece.

[0042] Specifically, base member 110 is a flat metal plate with a thickness of 0.8 mm and a width of 25 mm, fixed to the wall surface at a desired length. Base member 110 is fixed to wall 500 by, for example, masking tape, which is a tape material with a sliding property and an adhesive applied to the back surface of one side.

[0043] Furthermore, a flat magnetic body M serving as attraction means 130 is fixed to the upper layer of base member 110 fixed to wall body 500. Magnetic body M is, for example, a strip-shaped magnet having a thickness of 4 mm and a width of 25 mm, and is formed to the same length as base member 110. It is fixed so as to be superimposed on the upper layer of base member 110 fixed to wall body 500.

[0044] The magnetic material M may be fixed to the base member 110 by its magnetic force, but it is also preferable to fix it with masking tape so as to cover the upper layer of the magnetic material M that is layered on the upper layer of the base member 110 fixed to the wall body 500.

[0045] The base member 110 and the magnetic body M are fixed at positions facing each other across the central axis of the hole, which is the recess to be formed in the wall body 500, which is the workpiece. Specifically, in this embodiment, the two base members 110 and the magnetic body M are fixed to the wall body 500 at positions 80 mm apart from each other, with the recess to be formed as the center.

[0046] The cover portion 120 covers the area where the cutting tool 210 (described later) cuts the wall 500, which is the workpiece, thereby preventing the scattering of dust generated when the cutting tool 210 cuts the wall 500, and is provided with a box main body portion 121, an insertion hole 122, a suction hole 123, and an adsorption base 124.

[0047] Box body main body 121 is a box-shaped body having an opening on the side where cutting tool 210 cuts wall body 500, which is the workpiece. Specifically, box body main body 121 is made by cutting a hollow square bar with a thickness of 2.5 mm to a height of 60 mm and closing one side to form a box shape.

[0048] Box body main body 121 may be made of any material, but is preferably made of a lightweight material because cover 120 is attached to base member 110. Box body main body 121 in this embodiment is made of aluminum.

[0049] The box body main body 121 is disposed between the two base members 110 and the magnetic body M with the opening of the box body main body 121 facing the wall body 500 so as to close the opening. The box body main body 121 is supported by the thickness of the two base members 110 and the magnetic body M and can move between the two base members 110 and the magnetic body M along the gap between the two base members 110 and the magnetic body M.

[0050] The insertion hole 122 is a hole for inserting a cutting tool 210 so that the workpiece can be cut. Specifically, it is a hole formed with a diameter of 32 mm to 35 mm and provided on one side surface closed by the box body main body 121. A 32 mm core bit is inserted into the insertion hole 122 as the rod-shaped cutting tool 210.

[0051] In this embodiment, the rotation axis of the cutting device 200 and the rotation axis of the rod-shaped cutting tool 210 are arranged coaxially, and the rotation axes of the cutting device 200 and the cutting tool 210 are brought into contact with the wall surface in a direction perpendicular to the wall surface, so that the insertion hole 122 is provided on one side surface closed by the box body main body portion 121, but the insertion hole 122 can also be provided on another surface of the box body main body portion 121.

[0052] For example, if the rotation axis of the cutting device 200 and the rotation axis of the cutting tool 210 can be flexibly changed, an insertion hole 122 can be formed on the side of the box body main body 121, and the rotation axis of the cutting device 200 inserted through the insertion hole 122 can be changed inside the box body main body 121.

[0053] Specifically, when the opening of the box body main body 121 is installed so as to be closed by the wall body 500, an insertion hole 122 is provided on the lower side surface, and the rotation axis of the cutting device 200 is inserted from the lower side toward the upper side through the insertion hole 122, and the rotation axis of the cutting tool 210 can be changed to a direction perpendicular to the wall body 500 inside the box body main body 121.

[0054] Suction hole 123 is a hole provided for connecting suction device 300 for sucking dust to suction hose SH, which connects box body main body 121. Suction hole 123 can be provided at any position on box body main body 121, and can be provided at any position depending on the position of insertion hole 122 formed in box body main body 121. Also, a joint 123A can be provided in advance to make it easier to connect suction hole 123 and suction hose SH.

[0055] The adsorption base 124 is for adsorbing the box body main body 121 to the magnetic body M and the base member 110. Specifically, it is a metal angle bar with a thickness of 0.8 mm cut to a length of 50 mm.

[0056] One outer surface of the suction base 124 faces the opening side of the box body main body portion 121, and the other outer surface of the suction base 124 faces the side of the box body main body portion 121, and the other outer surface of the suction base 124 and the side of the box body main body portion 121 are fixed together.

[0057] As a result, when the opening of the box body main body 121 is closed by the wall 500 and the box body main body 121 is placed between the two base members 110 and the magnetic body M, one outer surface of the adsorption base 124 and the magnetic body M are adsorbed to each other.

[0058] At this time, one outer surface of the suction base 124 facing the opening side of the box body main body portion 121 should be fixed at a position spaced apart from the opening of the box body main body portion 121 by the thickness of the base member 110 and the magnetic material M, i.e., about 4.8 mm.

[0059] As a result, the opening of the box body main body 121 is attracted to the wall 500 with the opening of the box body main body 121 being closed between the two base members 110 and the magnetic body M. That is, the box body main body 121 can cover the portion of the wall 500 where the cutting tool 210 cuts.

[0060] In this way, by adsorbing the cover portion 120 and the base member 110 fixed to the wall body 500 via the adsorption means 130, the portion where the cutting tool 210 cuts the wall body 500 is covered, and the cutting tool 210 is inserted through the insertion hole 122 provided in the cover portion 120, and while the cutting tool 210 cuts the wall body 500, the suction device 300 sucks up the generated dust through the suction hose SH connected to the suction hole 123, so that dust does not fly out from the cover portion 120.

[0061] In order to improve the sealing accuracy, an elastic member can be provided at the contact point between the cover portion 120 and the wall body 500 or the base member 110, but since the suction device 300 sucks inside the cover portion 120, the scattering of dust can be sufficiently suppressed even if there is a small gap.

[0062] If a gap occurs at the contact point between the cover portion 120 and the wall body 500 or the base member 110, a member for filling the gap may be inserted from the outside to close the gap.

[0063] Furthermore, since the cover portion 120 is attached to the wall body 500 by the suction means 130, there is no need to hold down the cover portion 120 by hand, and therefore the wall body 500 can be cut safely with the cutting tool 210.

[0064] Furthermore, by adsorbing the cover portion 120 to the wall body 500 by the adsorption means 130, the cover portion 120 can be easily moved along the gap between the two base members 110 and the magnetic body M. In other words, a recess can be formed in the wall body 500 at any position along the gap between the two base members 110 and the magnetic body M.

[0065] At this time, as mentioned above, the magnetic body M is fixed with masking tape so as to cover the upper layer, so when the cover part 120 is adsorbed to the magnetic body M, the masking tape is interposed between the cover part 120 and the magnetic body M as an intervening layer.

[0066] This weakens the magnetic force of the magnetic material M, or due to the sliding properties of one side of the masking tape, makes it possible to easily move the cover portion 120 along between the two base members 110 and the magnetic material M.

[0067] Furthermore, because the cover portion 120 is attached to the wall body 500 by the suction means 130, even if the length of the cutting tool 210 increases, there is no need to increase the size of the cover portion 120 as in the accordion-shaped dust collection cover 13 of the prior art. In other words, the dust collection device 100 of this embodiment can accommodate bits of various lengths.

[0068] In the present embodiment, the magnetic body M is provided as the adsorption means 130 on the upper layer of the base member 110, but the magnetic body M may be provided only on the other outer surface of the adsorption base 124. In this case, it is preferable to provide an intervening layer between the magnetic body M provided on the other outer surface of the adsorption base 124 and the base member 110 fixed to the wall body 500.

[0069] Furthermore, the attraction means 130 is not limited to the magnetic material M, and since the base member 110 is formed in a flat plate shape, a suction cup can be provided on the cover part 120 as the attraction means 130. Specifically, a suction cup as the attraction means 130 provided on the other outer surface of the attraction base 124 can be attached to the flat plate-shaped base member 110 fixed to the wall body 500.

[0070] Alternatively, the cover portion 120 can be installed on the wall 500 so that the opening of the cover portion 120 is closed, and an suction device 300 connected to the cover portion 120 can be used to reduce the internal pressure of the cover portion 120, thereby adsorbing the cover portion 120 to the base member 110, thereby serving as the suction means 130.

[0071] FIG. 2 is a front view, a rear view, a left side view, a right side view, a plan view, and a bottom view showing the details of the cover portion. As shown in FIG. 2, the cover 120 includes a box body 121, an insertion hole 122, a suction hole 123, and a suction base 124, and may further include a cutting tool guide 125 and a vent hole 126.

[0072] Box body main body 121 is a box-shaped body having an opening on the side where cutting tool 210 cuts wall body 500, which is the workpiece. For example, it is made by cutting an aluminum hollow block to an arbitrary length and closing one of the open sides with base material 121A to form a box shape.

[0073] The base material 121A that closes one side may be made of any material, but since the cover portion 120 is attached to the base member 110 by suction, it is preferable that it be made of a lightweight material.

[0074] In this embodiment, base material 121A is formed to a thickness of approximately 10 mm using a foam with appropriate elasticity, such as calcium carbonate foam, calcium silicate, or expanded polystyrene, and the opening in box body main body 121 is closed by fitting and fixing base material 121A so as to close one of the open sides.

[0075] The insertion hole 122 is a hole for inserting a cutting tool 210 so that the workpiece can be cut. Specifically, it is a hole formed with a diameter of 32 mm to 35 mm and provided in the base material 121A of the box body main body 121. A 32 mm core bit is inserted into the insertion hole 122 as the rod-shaped cutting tool 210.

[0076] Furthermore, insertion hole 122 can be provided with an on-off valve 122A that opens insertion hole 122 when cutting tool 210 is inserted and closes insertion hole 122 when cutting tool 210 is not inserted, i.e., when cutting tool 210 is withdrawn. As a result, on-off valve 122A closes insertion hole 122 when cutting tool 210 is withdrawn from insertion hole 122, it is possible to prevent dust generated inside cover portion 120 from leaking out through insertion hole 122 to the outside when cutting tool 210 is withdrawn from insertion hole 122.

[0077] The opening / closing valve 122A is provided to close the insertion hole 122 with a resin sheet material such as rubber having elastic recovery properties, and the resin sheet material provided to close the insertion hole 122 has a structure with slits cut radially from the center of the closed insertion hole 122.

[0078] When the cutting tool 210 is inserted into the insertion hole 122, the opening / closing valve 122A has slits cut radially from the center of the resin sheet material, so that the multiple triangular valves formed around the mouth of the insertion hole 122 bend in the insertion direction of the cutting tool 210, thereby opening the insertion hole 122.

[0079] Furthermore, when the cutting tool 210 is not inserted, i.e., when it is pulled out, the elastic restoring property of the resin sheet material that forms the opening / closing valve 122A allows the multiple valves that have restored to their original state to block the insertion hole 122 to restore, thereby closing the insertion hole 122.

[0080] The suction hole 123 is a hole provided for connecting a suction device 300 for sucking dust to a suction hose SH that connects the box body main body 121. A joint 123A can be provided in advance to make it easier to connect the suction hole 123 and the suction hose SH.

[0081] The adsorption base 124 is a metal angle member provided to adsorb the box body main body 121 to the magnetic body M and the base member 110. One outer surface 124A of the suction base 124 faces the opening side of the box body main body portion 121, and the other outer surface 124B of the suction base 124 faces the side surface of the box body main body portion 121, and the other outer surface of the suction base 124 and the side surface of the box body main body portion 121 are fixed together.

[0082] The cutting tool guide portion 125 is for guiding the cutting tool 210 inserted through the insertion hole 122 in the cutting direction inside the cover portion 120. Specifically, the inner dimensions of the cover portion 120 are adjusted to match the outer diameter width of the cutting tool by extending the opposing inner side surfaces of the cover portion 120 inward.

[0083] As a result, the movement of cutting tool 210 inserted inside cover part 120 is restricted by cutting tool guide part 125, so that cutting tool 210 can be guided in the cutting direction inside cover part 120.

[0084] Cutting tool guide portion 125 may be made of any material, but is preferably made of a lightweight material because cover portion 120 is attached to base member 110. In this embodiment, the inner side surface of cover portion 120 is extended inward using a foam with appropriate elasticity, such as calcium carbonate foam, calcium silicate, or expanded polystyrene.

[0085] The ventilation hole 126 is a hole that can be provided as needed to adjust the pressure inside the cover part 120. The pressure inside the cover part 120 is reduced by suction using a suction device 300 connected to the suction hole 123 via a suction hose SH.

[0086] If the pressure inside the cover part 120 becomes excessively low, the pressure inside the cover part 120 can be adjusted by providing an air vent 126 at any position on the cover part 120 to allow outside air to enter the inside of the cover part 120.

[0087] FIG. 3 is a diagram showing a process of fixing the base member and the magnetic body M to the wall body. As shown in FIG. 3(A), the base members 110 are placed at positions facing each other across the central axis of the hole, which is the recess to be formed in the wall body 500, which is the workpiece, and are fixed to the wall body 500 with masking tape T1.

[0088] Next, as shown in Figure 3(B), a flat magnetic material M is attracted by magnetic force to the upper layer of the base member 110 fixed to the wall body 500 by the masking tape T1, i.e., the upper layer of the masking tape T1 that fixes the base member 110 to the wall body 500.

[0089] Next, as shown in FIG. 3(C), a masking tape T2 is applied as an intermediate layer so as to cover the flat magnetic material M adsorbed to the upper layer of the masking tape T1 that fixes the base member 110 to the wall body 500.

[0090] FIG. 4 is a diagram showing a state in which a hole has been formed in a wall body using a cutting device equipped with a core bit, which is a cutting tool, and a dust collecting device. 4, a base member 110 and a magnetic body M are fixed to the wall body 500, and the cover part 120 is attracted to the base member 110 via the magnetic body M. A core bit, which is a cutting tool 210 attached to the cutting device 200, is inserted through the insertion hole 122 to cut the wall body 500.

[0091] The cutting device 200 is connected to a movement mechanism (not shown) that includes a forward / backward movement mechanism for moving the cutting device 200 forward or backward relative to the wall body 500, and an up / down movement mechanism for moving the forward / backward guide mechanism up and down parallel to the wall surface of the wall body 500.

[0092] By moving the cutting device 200 forward using the forward / backward movement mechanism, the cutting tool 210 can come into contact with the wall 500 and cut the wall 500, and by moving the cutting device 200 up and down using the up / down movement mechanism, the cutting portion of the cutting tool 210 can be moved in the vertical direction.

[0093] The cover portion 120 is attracted to the wall body 500 so that the opening of the cover portion 120 is closed between the two base members 110 and the magnetic body M. Therefore, the cover portion 120 can cover the portion of the wall body 500 where the cutting tool 210 cuts.

[0094] In this state, the cutting tool 210 is inserted through the insertion hole 122 provided in the cover part 120, and while the wall body 500 is cut with the cutting tool 210, the suction device 300 sucks up the generated dust through the suction hose SH connected to the suction hole 123. Dust generated by cutting with cutting tool 210 is generated inside cover portion 120, and since the cutting portion is covered by cover portion 120, dust does not fly out from cover portion 120.

[0095] Furthermore, since the cover portion 120 is attached to the wall body 500 by the suction means 130, there is no need to hold down the cover portion 120 by hand, and therefore the wall body 500 can be cut safely with the cutting tool 210.

[0096] Furthermore, cutting device 200 can be connected to compressor 600, which supplies compressed air. Compressed air supplied from compressor 600 via air hose AH is connected to the main body of cutting device 200, and the main body of cutting device 200 is provided with a flow path for supplying the supplied compressed air to cutting tool 210, whereby the compressed air is discharged from cutting tool 210.

[0097] This reduces the increase in frictional heat that occurs when the cutting tool 210 rotates and cuts the wall body 500. In addition, by supplying compressed air to the cutting portion, clogging of the cutting portion with dust can be prevented. The compressed air sent to the cutting tool 210 is sucked together with dust generated by cutting by a suction device 300 connected to a suction hole 123 of the cover part 120 .

[0098] FIG. 5 is a diagram showing a process of forming a continuous hole in a wall body using a cutting device equipped with a core bit, which is a cutting tool, and a dust collecting device. 5, a pair of flat base members 110 are arranged at positions facing each other across the central axis of a recess to be formed in wall body 500, and a box-shaped cover member 120 is attached to base members 110 by suction so as to close the opening. Then, a cutting device 200 having a cutting tool 210 attached thereto is used to form a continuous hole at the position of the recess to be formed in wall body 500.

[0099] First, the cover part 120 is placed so that it is aligned with the uppermost end of the continuous hole to be formed and the central axis of the continuous hole to be formed. At this time, the center of the uppermost end of the continuous hole to be formed and the center of the insertion hole 122 of the cover part 120 are aligned.

[0100] In this state, the tip of cutting tool 210 is inserted into insertion hole 122 and placed so that the tip of cutting tool 210 is at the center position of the top end of the continuous hole to be formed. Next, cutting device 200 is rotated and moved forward perpendicular to wall body 500, and cutting tool 210 attached to cutting device 200 is inserted into wall body 500.

[0101] When the tip of the core bit reaches the depth of the hole to be formed, the cutting device 200 is retracted and the core bit is removed from the wall body 500 and the cover part 120. This forms the uppermost hole of the continuous hole in the wall body 500.

[0102] Next, the position of the next hole to be formed is determined so that the hole formed at the top end overlaps the hole to be cut next, moving downward in the longitudinal direction of the continuous hole to be formed. Then, the cover part 120 is moved so that the center of the next hole to be formed coincides with the center of the insertion hole 122 of the cover part 120.

[0103] Then, the tip of cutting tool 210 is inserted into insertion hole 122 again, and the tip of cutting tool 210 is positioned at the center of the next hole to be formed. Cutting device 200 is then advanced perpendicularly to wall body 500, and the core bit attached to cutting device 200 is inserted into wall body 500. This forms the next hole in wall body 500.

[0104] Thereafter, similarly, the position where the formed hole and the next hole to be cut overlap is determined toward the longitudinal lower portion of the continuous hole to be formed, and the cover part 120 is moved so that the center of the hole coincides with the center of the insertion hole 122 of the cover part 120.The tip of the core bit attached to the cutting device 200 is inserted through the insertion hole 122, and the process of cutting the wall body 500 is repeated, thereby forming a continuous hole in the wall body 500.

[0105] Furthermore, by using a special bit with cutting blades on the entire circumferential surface of a rod-shaped cutting tool, for example, it is possible to cut continuous groove-like recesses while moving the cover part 120 without moving the cutting device 200 back and forth.

[0106] Specifically, first, the uppermost end of the continuous hole to be formed is cut with a core bit to form the hole, and then the core bit is removed from the cover part 120. Without moving the cover part 120, the core bit attached to the cutting device 200 is changed to a special bit with cutting blades on the entire circumferential surface.

[0107] The cutting device 200 equipped with the special bit is moved and inserted into the hole at the top end that has been formed, and the cutting device 200 is rotated. While the cutting device 200 is being rotated, the cutting device 200 is moved downward in the longitudinal direction of the groove-shaped recess to be formed.

[0108] Since the special bit is inserted into the insertion hole 122 of the cover part 120, by moving the cutting device 200 toward the longitudinal bottom of the groove-shaped recess to be formed, the cover part 120 also moves toward the longitudinal bottom together with the cutting device 200.

[0109] Since the special bit has cutting edges on the entire circumferential surface, a groove-shaped recess is formed in the wall body 500 by the cutting device 200 moving downward in the longitudinal direction while rotating. At this time, the cutting area moves toward the longitudinal bottom of the groove-shaped recess to be formed, but the cover part 120 also moves toward the longitudinal bottom together with the cutting device 200, so the cutting area is always covered by the cover part 120.

[0110] Dust generated inside the cover 120 is sucked in by a suction device, so the dust does not scatter around. This makes it possible to reliably and safely prevent chips and dust generated during drilling work from scattering. [Explanation of symbols]

[0111] 100 Dust collector 110 Base member 120 Cover 121 Box body part 122 Insertion hole 123 Suction hole 123A Joint 124 Adsorption Base 130 Adsorption means 200 Cutting equipment 300 Suction device 500 wall SH suction hose

Claims

1. A dust collecting device that collects dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, a pair of flat-plate-shaped base members attached to the workpiece with a recess to be formed therebetween; a cover portion which is a box-shaped body with at least one side open, and which includes an insertion hole through which the cutting tool is inserted so as to be able to cut the workpiece, and a suction hole which is connected via a suction hose to a suction device for suctioning dust; a suction means for suction-attaching the cover portion, the open surface of which faces the workpiece, to the base member; A dust collecting device comprising:

2. The base member is A metal plate material, The adsorption means is Adsorption via a magnetic substance M; 2. The dust collecting device according to claim 1,

3. The magnetic body M is being disposed on the upper layer of the metal plate; 3. The dust collecting device according to claim 2, wherein:

4. an intervening layer provided between the metal plate and the magnetic body M; 3. The dust collecting device according to claim 2, further comprising:

5. The intermediate layer is The tape material has a sliding property and an adhesive applied to the back side of one side.

5. The dust collecting device according to claim 4, wherein:

6. The tape material is It is masking tape, 6. The dust collecting device according to claim 5,

7. The insertion hole is an on-off valve that closes the insertion hole when the cutting tool is not inserted; 2. The dust collecting device according to claim 1, further comprising:

8. The on-off valve is A resin sheet material having slits cut radially from the center.

8. The dust collecting device according to claim 7,

9. The cover portion is a guide portion that guides the cutting tool inserted through the insertion hole in a cutting direction; 2. The dust collecting device according to claim 1, further comprising:

10. The cover portion is Ventilation holes to let outside air in 2. The dust collecting device according to claim 1, further comprising:

11. The base member is The recesses are disposed at positions facing each other across the central axis of the recess in the longitudinal direction.

2. The dust collecting device according to claim 1,

12. A dust collection method for collecting dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, comprising: a step of attaching a pair of flat-plate-shaped base members to the workpiece with a recess to be formed therebetween; a step of orienting a cover part, which is a box-shaped body with at least one open side, and which has an insertion hole through which the cutting tool can be inserted so as to be able to cut the workpiece, and a suction hole connected via a suction hose to a suction device for suctioning dust, with the open side facing the workpiece; a step of adsorbing the cover portion and the base member by an adsorption means; A dust collection method comprising:

13. A cutting device including a dust collector that collects dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, a pair of flat-plate-shaped base members attached to the workpiece with a recess to be formed therebetween; a cover portion which is a box-shaped body with at least one side open, and which includes an insertion hole through which the cutting tool is inserted so as to be able to cut the workpiece, and a suction hole which is connected via a suction hose to a suction device for suctioning dust; a suction means for suction-attaching the cover portion, the open surface of which faces the workpiece, to the base member; A cutting device comprising:

14. A cutting method using a cutting device equipped with a dust collection device that collects dust generated when a rod-shaped cutting tool cuts a workpiece to form a recess, comprising: a step of attaching a pair of flat-plate-shaped base members to the workpiece with a recess to be formed therebetween; a step of orienting a cover part, which is a box-shaped body with at least one open side, and which has an insertion hole through which the cutting tool can be inserted so as to be able to cut the workpiece, and a suction hole connected via a suction hose to a suction device for suctioning dust, with the open side facing the workpiece; a step of adsorbing the cover portion and the base member by an adsorption means; A cutting device comprising:

Images