JP6965176B2 - Dust collection cover - Google Patents

Description

The techniques disclosed herein relate to dust collection covers.

Patent Document 1 discloses a dust collecting cover used in a cutting machine that rotates a cutting blade. This dust collecting cover partially covers the circumference of the cutting blade, and is attached to the cover body having an opening so as to be relatively movable with respect to the cover body, and is a base surface that comes into contact with the object to be cut. It has a base with. In this dust collecting cover, the amount of protrusion of the cutting blade from the base surface can be adjusted by adjusting the position of the base relative to the cover body.

JP-A-2009-172696

In the dust collecting cover of Patent Document 1, since the cover body covers the periphery of the cutting blade, it is difficult to replace the cutting blade. In the dust collecting cover used in the cutting machine, a technique capable of improving workability when replacing the cutting blade is expected.

The present specification discloses a dust collecting cover used in a cutting machine that rotates a cutting blade. The dust collecting cover partially covers the periphery of the cutting blade, is attached to the cover main body having an opening so as to be relatively movable with respect to the cover main body, and comes into contact with the object to be cut. A base having a base surface and a detachable cover detachably attached to either the cover main body or the base so as to cover the opening are provided. In the dust collecting cover, the removable cover is non-detachable when the base is at a position where the cutting blade projects from the base surface with respect to the cover main body.

In the above-mentioned dust collecting cover, the amount of protrusion of the cutting blade from the base surface can be adjusted by adjusting the position of the base relative to the cover body. In the above configuration, when the cutting work is performed by the cutting machine, by attaching the removable cover, the opening of the cover body is covered by the removable cover to prevent the cutting powder from leaking to the outside. Can be done. Further, in the above configuration, when the cutting blade is replaced, the cutting blade can be easily replaced through the opening of the cover body by removing the removable cover. Further, in the above configuration, it is prohibited to remove the removable cover when the cutting blade is in a position where it protrudes from the base surface. Therefore, it is possible to prevent the removable cover from being accidentally removed when the work is being performed using the cutting machine. According to the above-mentioned dust collecting cover, the workability when replacing the cutting blade can be improved by a simple structure.

It is a perspective view of the grinding machine 4 to which the dust collecting cover 2 of an Example is attached seen from the front upper right side. It is a perspective view of the grinding machine 4 to which the dust collecting cover 2 of an Example is attached seen from the front lower left side. It is a vertical sectional view of the grinder 4 to which the dust collecting cover 2 of an Example is attached. It is a perspective view which looked at the dust collection cover 2 of an Example from the rear lower left side. It is a perspective view of the bearing box 12 of the grinding machine 4 to which the dust collecting cover 2 of an Example is attached seen from the rear lower right side. It is a side view which shows the state which the detachable cover 56 was removed about the dust collection cover 2 of an Example. FIG. 5 is a perspective view of the removable cover 56 of the dust collecting cover 2 of the embodiment as viewed from the front upper right side. FIG. 5 is a perspective view of the removable cover 56 of the dust collecting cover 2 of the embodiment as viewed from the rear upper left side. FIG. 5 is a side view showing a state in which the removable cover 56 is detachably attached to the dust collecting cover 2 of the embodiment. It is sectional drawing which shows the structure of the seat surface portion 74c of the right side cover 62 of the dust collection cover 2 of Example, and the seat surface portion 80c of the detachable cover 56. It is sectional drawing which shows the structure of the adjustment part 88 of the dust collection cover 2 of an Example. FIG. 5 is a side view showing a state in which the removable cover 56 is non-detachably attached to the dust collecting cover 2 of the embodiment.

In one or more embodiments, the dust cover may be used in a cutting machine that rotates the cutting blade. The dust collecting cover partially covers the circumference of the cutting blade, and is attached to the cover body having an opening so as to be relatively movable with respect to the cover body, and a base surface that comes into contact with the object to be cut. It may be provided with a base to be held and a detachable cover detachably attached to either the cover main body or the base so as to cover the opening. In the dust collecting cover, the removable cover may not be removable when the base is at a position where the cutting blade protrudes from the base surface with respect to the cover main body.

In the above-mentioned dust collecting cover, the amount of protrusion of the cutting blade from the base surface can be adjusted by adjusting the position of the base relative to the cover body. In the above configuration, when the cutting work is performed by the cutting machine, by attaching the removable cover, the opening of the cover body is covered by the removable cover to prevent the cutting powder from leaking to the outside. Can be done. Further, in the above configuration, when the cutting blade is replaced, the cutting blade can be easily replaced through the opening of the cover body by removing the removable cover. Further, in the above configuration, it is prohibited to remove the removable cover when the cutting blade is in a position where it protrudes from the base surface. Therefore, it is possible to prevent the removable cover from being accidentally removed when the work is being performed using the cutting machine. According to the above-mentioned dust collecting cover, the workability when replacing the cutting blade can be improved by a simple structure.

In one or more embodiments, the cutting blade may be attached to the cutting machine by fasteners. The fastener may be included within the opening when viewed from the direction along the axis of rotation of the cutting blade.

According to the above configuration, the fastener can be easily attached and detached through the opening of the cover body with the detachable cover removed. Workability when replacing the cutting blade can be further improved.

In one or more embodiments, the maximum length of the opening may be greater than the diameter of the cutting edge.

According to the above configuration, the cutting blade can be taken in and out through the opening of the cover body with the removable cover removed. Workability when replacing the cutting blade can be further improved.

In one or more embodiments, the removable cover may be attached to the cover body.

In the configuration in which the removable cover that covers the opening of the cover body is attached to the base, when the base is moved relative to the cover body, the removable cover also moves relative to the cover body. For this reason, it becomes difficult to secure the sealing property of the opening of the cover body by the removable cover. On the other hand, in the above configuration, since the removable cover is attached to the cover body, the removable cover does not move relative to the cover body even if the base is moved relative to the cover body. .. Therefore, it is possible to ensure good sealing performance of the opening of the cover body by the removable cover.

In one or more embodiments, a labyrinth structure may be formed between the removable cover and the cover body.

According to the above configuration, it is possible to secure better sealing performance of the opening of the cover body by the removable cover.

In one or more embodiments, at least a portion of the removable cover may be made of a transparent material.

According to the above configuration, when the cutting operation is performed by the cutting machine, the state of the cutting blade and the object to be cut inside the dust collecting cover can be visually recognized from the outside of the dust collecting cover.

In one or more embodiments, the removable cover may be sandwiched between the cover body and the base when the base is in the first position with respect to the cover body in which the cutting blade projects from the base surface. When the base is in the second position with respect to the cover main body so that the cutting blade does not protrude from the base surface, the removable cover does not have to be sandwiched between the cover main body and the base.

According to the above configuration, the detachable cover can be switched between the removable state and the non-detachable state according to the relative position of the base with respect to the cover body by a simple configuration.

(Example)
As shown in FIGS. 1 and 2, the dust collecting cover 2 of this embodiment is used by being attached to a grinder 4 which is an example of a cutting machine. The grinder 4 can perform cutting, grooving, asphalt road surface cutting, and the like by rotating a diamond wheel 6, which is an example of a cutting blade. In the following description, the longitudinal direction of the grinder 4 is referred to as the front-rear direction, the direction in which the rotation axis of the diamond wheel 6 extends is referred to as the left-right direction, and the direction orthogonal to the front-rear direction and the left-right direction is referred to as the up-down direction.

As shown in FIG. 3, the grinder 4 includes a main body housing 8, a gear housing 10, and a bearing box 12.

A motor 14 is housed inside the front of the main body housing 8. The motor 14 is an inner rotor type brushless DC motor. The motor 14 has an output shaft 16 extending in the front-rear direction. The output shaft 16 is rotatably supported by the main body housing 8 via bearings 18 and 20. A battery 22 is attached to the rear end of the main body housing 8. The battery 22 is a slide-type battery that can be attached and detached by sliding it in the left-right direction (vertical direction in FIG. 3) with respect to the main body housing 8. Inside the rear of the main body housing 8, a control board 24 on which a microcomputer, a switching element for driving the motor 14, and the like are mounted is housed. The electric power supplied from the battery 22 is supplied to the motor 14 via the control board 24. A slide switch 26 that can slide in the front-rear direction is provided on the front left surface (upper surface in FIG. 3) of the main body housing 8. The slide switch 26 can be switched between the on position and the off position by a user operation. The position of the slide switch 26 is detected by the detection switch 28 housed inside the main body housing 8. The detection switch 28 is connected to the control board 24. When the slide switch 26 is in the on position, electric power from the battery 22 is supplied to the motor 14 via the control board 24, and the motor 14 rotates the output shaft 16. When the slide switch 26 is in the off position, the power supply of the battery 22 to the motor 14 is cut off, and the motor 14 stops the output shaft 16. A display unit 30 including an LED or the like is provided on the left rear surface (upper surface in FIG. 3) behind the main body housing 8. The display unit 30 is connected to the control board 24. The display unit 30 notifies the user of the operating state of the grinder 4 and the remaining battery level of the battery 22 by changing the display according to the operating state of the grinder 4 and the remaining battery level of the battery 22.

The gear housing 10 is attached to the front of the main body housing 8. Inside the gear housing 10, a first bevel gear 32 and a second bevel gear 34 arranged so as to mesh with each other are housed. The first bevel gear 32 is fixed to the front end of the output shaft 16. The second bevel gear 34 is fixed to the left end portion (upper end portion in FIG. 3) of the spindle 36 extending in the left-right direction (vertical direction in FIG. 3). Hereinafter, the first bevel gear 32 and the second bevel gear 34 are collectively referred to as a bevel gear 38. The bevel gear 38 transmits the rotation of the motor 14 to the spindle 36. The gear housing 10 holds the left end portion (upper end portion in FIG. 3) of the spindle 36 via the bearing 40. As shown in FIG. 2, a shaft lock 42 is provided on the left surface of the gear housing 10. When the user pushes in the shaft lock 42, the rotation of the second bevel gear 34 is prohibited and the rotation of the spindle 36 is prohibited.

As shown in FIG. 3, the bearing box 12 is attached to the right side (lower part of FIG. 3) of the gear housing 10. The bearing box 12 holds the spindle 36 via the bearing 41. The spindle 36 can rotate about a rotation axis along the left-right direction (vertical direction in FIG. 3) with respect to the bearing box 12. A diamond wheel 6 can be attached to the right end portion (lower end portion in FIG. 3) of the spindle 36 via an inner flange 44 and a locknut 46. The inner flange 44 is fitted to the spindle 36. The diamond wheel 6 is attached to the spindle 36 from the right side (lower part of FIG. 3) of the inner flange 44 and is fitted to the inner flange 44. The locknut 46 is screwed onto the spindle 36 from the right end portion (lower end portion in FIG. 3) of the spindle 36, and sandwiches the diamond wheel 6 with the inner flange 44. In the grinder 4, when the motor 14 rotates, the diamond wheel 6 rotates around the rotation axis together with the spindle 36, so that the object to be cut can be cut.

The dust collection cover 2 is attached to the right side (lower part of FIG. 3) of the bearing box 12. The dust collection cover 2 is used to prevent the cutting powder from scattering around when the diamond wheel 6 cuts the object to be cut, and to collect the cutting powder by a dust collector (not shown).

As shown in FIG. 4, the dust collecting cover 2 includes a cover main body 52, a nozzle 54, a removable cover 56, and a base 58.

The cover body 52 includes a left side cover 60 and a right side cover 62. The left side cover 60 includes a band portion 64 and a cover portion 66. The band portion 64 is a fastener for adjusting the distance between a curved portion 64a in which a band-shaped flat plate is curved into a cylindrical shape, a pair of flat plate portions 64b extending outward from both ends of the curved portion 64a, and a pair of flat plate portions 64b. It is provided with 64c and a substantially triangular reinforcing plate 64d welded to one flat plate portion 64b and the curved portion 64a. The fastener 64c penetrates the pair of flat plate portions 64b from the nut 64f fixed by welding to one outer surface of the pair of flat plate portions 64b and the other outer surface of the pair of flat plate portions 64b, and the nut 64f. It is equipped with 64 g of hexagon socket head cap screw welded to. The cover portion 66 has a flat plate portion 66b having a substantially circular opening 66a, a cylindrical portion 66c that bends outward along the edge of the opening 66a, and a rear end portion of the flat plate portion 66b toward the right side cover 62. It is provided with a support portion 66d that bends and bends. The cylindrical portion 66c is formed in a cylindrical shape having a substantially semicircular cross section. The band portion 64 and the cover portion 66 are fixed to each other by welding the outer peripheral surface of the cylindrical portion 66c and the inner peripheral surface of the curved portion 64a. Ribs 64e are formed on the inner peripheral surface of the curved portion 64a at a portion that is not welded to the outer peripheral surface of the cylindrical portion 66c. Ribs 66e and 66f are formed on the inner peripheral surface of the cylindrical portion 66c.

As shown in FIG. 5, the bearing box 12 is formed with a substantially cylindrical cover mounting portion 68 that projects to the right along the rotation axis direction (that is, the left-right direction) of the spindle 36. A flange 68a protruding outward is formed on the outer peripheral surface near the right end of the cover mounting portion 68. Notches 68b, 68c, 68d are formed on the flange 68a corresponding to the ribs 64e, 66e, 66f of the cover body 52 of the dust collecting cover 2. The dust collecting cover 2 has ribs 64e, 66e, 66f aligned with the cutouts 68b, 68c, 68d so that the cover mounting portion 68 enters the inside of the curved portion 64a and the cylindrical portion 66c. Can be attached to the bearing box 12 by sliding it to the left with respect to the bearing box 12. The position of the dust collecting cover 2 after being attached to the bearing box 12 in a state where the ribs 64e, 66e, 66f are aligned with the notches 68b, 68c, 68d is hereinafter also referred to as a detachable position. The dust collection cover 2 attached to the bearing box 12 is rotatable around the cover attachment portion 68. In other words, the dust collecting cover 2 can rotate about the rotation axis direction (that is, the left-right direction) of the spindle 36 with respect to the bearing box 12. When the dust collection cover 2 is rotated from the attachment / detachment position with respect to the bearing box 12, the ribs 64e, 66e, 66f engage with the flange 68a, and the dust collection cover 2 is prohibited from sliding to the right with respect to the bearing box 12. Will be done. In this case, the dust collecting cover 2 cannot be removed from the bearing box 12. When the dust collection cover 2 is rotated to the attachment / detachment position with respect to the bearing box 12, the ribs 64e, 66e, 66f and the notches 68b, 68c, 68d are aligned and the dust collection cover 2 is aligned to the right with respect to the bearing box 12. Slides are allowed. In this case, the dust collecting cover 2 can be removed from the bearing box 12.

The user can fix the position of the dust collection cover 2 with respect to the bearing box 12 by rotating the dust collection cover 2 to a desired position with respect to the bearing box 12 and then tightening the fastener 64c. When the fastener 64c is tightened, the curved portion 64a and the cylindrical portion 66c are pressed against the cover mounting portion 68, and the rotation of the dust collecting cover 2 with respect to the bearing box 12 is prohibited. When the fastener 64c is loosened, the curved portion 64a and the cylindrical portion 66c are not pressed against the cover mounting portion 68, and the dust collecting cover 2 is allowed to rotate with respect to the bearing box 12.

As shown in FIG. 4, the right side cover 62 is fixed to the left side cover 60 by mounting screws 70. The right side cover 62 includes a nozzle attachment portion 72 to which the nozzle 54 is attached, a detachable cover attachment portion 74 to which the attachment / detachment cover 56 is attached, and a base attachment portion 76 to which the base 58 is attached. The nozzle mounting portion 72 is arranged on the front upper portion of the right side cover 62, the removable cover mounting portion 74 is arranged on the right surface of the right side cover 62, and the base mounting portion 76 is arranged on the front lower portion of the right side cover 62. There is.

The nozzle 54 has a bent cylindrical shape. The nozzle 54 is rotatably fitted to the nozzle mounting portion 72. A hose (not shown) extending from a dust collector (not shown) can be attached to the nozzle 54.

As shown in FIG. 6, an opening 74a is formed in the attachment / detachment cover attachment portion 74 of the right side cover 62. A seating surface portion 74c is formed at a portion of the peripheral edge of the opening portion 74a except for the front side side 74b.

As shown in FIGS. 7 and 8, the removable cover 56 includes a metal frame member 78 and a transparent resin window member 80. As shown in FIG. 7, the frame member 78 is formed in a frame shape that covers the peripheral edge of the window member 80 on the front side (right side) of the window member 80 and does not cover the inside. Therefore, the user can visually recognize how the diamond wheel 6 cuts the object to be cut through the transparent window member 80 when the cutting work is performed by the grinder 4. Further, even if the window member 80 becomes cloudy due to the cutting powder, the window member 80 can be easily cleaned by removing the removable cover 56.

The frame member 78 is fixed to the window member 80 by mounting screws 79. A through hole 80a is formed in the front portion of the window member 80. When the grinder 4 performs the cutting operation, the user can visually recognize how the diamond wheel 6 cuts the object to be cut through the through hole 80a even if the window member 80 is fogged by the cutting powder. can. Further, on the front edge of the window member 80, an insertion piece 80b is formed corresponding to the front side 74b of the opening 74a. As shown in FIG. 8, a support piece 78a projecting to the left is formed in the rear portion of the frame member 78. A notch 78b is formed in the support piece 78a. Further, on the back side (left side) of the window member 80, a seat surface portion 80c is formed corresponding to the seat surface portion 74c.

As shown in FIG. 9, the removable cover 56 has a seat surface portion 80c inserted into the seat surface portion 74c of the right side cover 62 in a state where the front insertion piece 80b is inserted into the right side cover 62 at the front side 74b of the opening 74a. Is mounted on the cover body 52. By inserting the insertion piece 80b of the removable cover 56 into the inside of the right side cover 62, it is possible to prevent the removable cover 56 from being unintentionally removed. As shown in FIG. 10, the seat surface portion 74c of the right side cover 62 is formed with a convex portion and a concave portion, and the seat surface portion 80c of the removable cover 56 is also formed with a corresponding concave portion and a convex portion. A labyrinth structure is formed by the face portion 74c and the seat surface portion 80c. Therefore, when cutting work is performed by the grinder 4 with the removable cover 56 attached to the cover main body 52, cutting powder leaks from the inside of the dust collecting cover 2 to the outside through the gap between the removable cover 56 and the cover main body 52. It can be suppressed from coming out.

As shown in FIG. 4, when the detachable cover 56 is attached to the cover main body 52, the left side cover 60, the right side cover 62, and the detachable cover 56 have a box-shaped opening 81 having a substantially rectangular opening 81 below. The shape is formed. As shown in FIG. 9, when the removable cover 56 is attached to the cover main body 52, the diamond wheel 6 is covered with the cover main body 52 and the removable cover 56 in a state where a part of the diamond wheel 6 protrudes from the opening 81. ..

As shown in FIG. 4, the base 58 includes a side surface portion 82, a contact portion 84 bent from one lower side of the side surface portion 82, a support portion 86 bent from the contact portion 84, and a rear portion of the side surface portion 82. It includes an adjusting portion 88 bent from one side. The side surface portion 82 and the support portion 86 are rotatably attached to the base attachment portion 76 of the right side cover 62 around the rotation shaft 89. The contact portion 84 has a base surface 84a that comes into contact with the object to be cut. The adjusting unit 88 has an elongated hole 88a.

A bolt 90 penetrates through the elongated hole 88a of the adjusting portion 88. Washers 92 and 94, wing nuts 96, and nuts 98 are attached to the bolts 90. As shown in FIG. 11, the head of the bolt 90 is arranged in the space between the support portion 66d of the right side cover 62 and the left side cover 60, and the shaft portion penetrates the support portion 66d of the left side cover 60 and is attached and detached. It passes through the notch 78b of the support piece 78a of the cover 56, further penetrates the elongated hole 88a of the adjusting portion 88 of the base 58, and the screw portion protrudes to the outside. The washers 92 and 94 and the wing nut 96 are attached to the threaded portion of the bolt 90 from the outside of the adjusting portion 88. By attaching the nut 98 to the tip of the screw portion of the bolt 90, it is possible to prevent the washers 92 and 94 and the wing nut 96 from falling off. Even if the nut 98 is removed and the wing nut 96, washer 92, and 94 are removed, the base 58 cannot be removed from the cover body 52 because the bolt 90 penetrates the elongated hole 88a of the base 58. No. With such a configuration, it is possible to prevent the base 58 from being unintentionally detached from the cover main body 52.

When the wing nut 96 is loosened, the support portion 66d of the left side cover 60, the support piece 78a of the detachable cover 56, and the adjusting portion 88 of the base 58 are not fastened to each other. Therefore, the removable cover 56 is not fixed to the cover main body 52, and the base 58 is not fixed to the cover main body 52 either. On the other hand, when the wing nut 96 is tightened, the head of the bolt 90 and the washer 92 fasten the support portion 66d of the left side cover 60, the support piece 78a of the detachable cover 56, and the adjustment portion 88 of the base 58 to each other. Will be done. Therefore, the removable cover 56 is fixed to the cover main body 52, and the base 58 is also fixed to the cover main body 52.

When using the grinder 4, the user loosens the wing nut 96 and adjusts the rotation angle of the base 58 with respect to the cover body 52 to adjust the amount of protrusion of the diamond wheel 6 from the base surface 84a (that is, the base surface). The depth of cut from 84a) can be adjusted. After adjusting the rotation angle of the base 58 with respect to the cover main body 52, the base 58 can be fixed to the cover main body 52 by tightening the wing nut 96.

As shown in FIG. 1, a guide member 100 is provided above the front of the contact portion 84 of the base 58. The guide member 100 is slidably attached to the base 58 in the left-right direction. A guide line 100a that can be visually recognized by the user is formed on the upper surface of the guide member 100. By adjusting the position of the guide member 100 in the left-right direction so that the guide line 100a coincides with the cutting line by the diamond wheel 6, the user cuts the object to be cut when performing the cutting work by the grinder 4. You can check the position. The user can align the cutting position of the object to be cut with the black line by aligning the guide line 100a with the black line when performing the cutting work with the grinder 4.

As shown in FIG. 12, in a state where the base 58 is rotated with respect to the cover main body 52 so that the diamond wheel 6 projects from the base surface 84a, the side surface portion 82 of the base 58 overlaps with the detachable cover 56. In this case, since the removable cover 56 is sandwiched between the base 58 and the right side cover 62, the removable cover 56 cannot be removed from the cover main body 52 even when the wing nut 96 is loosened.

Unlike this, as shown in FIG. 9, when the base 58 is rotated with respect to the cover body 52 to a rotation angle at which the diamond wheel 6 does not protrude from the base surface 84a, the side surface portion 82 of the base 58 is attached and detached. It does not overlap with the cover 56. In this case, the detachable cover 56 is not sandwiched between the base 58 and the right side cover 62, and the detachable cover 56 can be removed from the cover main body 52 by loosening the wing nut 96.

In the grinder 4 to which the dust collecting cover 2 is attached, when replacing the diamond wheel 6, loosen the wing nut 96 and base the diamond wheel 6 to a rotation angle that does not protrude from the base surface 84a as shown in FIG. The 58 is rotated with respect to the cover body 52. Then, as shown in FIG. 6, the detachable cover 56 is removed from the cover main body 52. Then, after removing the locknut 46 through the opening 74a, the diamond wheel 6 is removed from the spindle 36, and the diamond wheel 6 is taken out from the opening 74a. Then, a new diamond wheel 6 is inserted through the opening 74a, the diamond wheel 6 is attached to the spindle 36, and the locknut 46 is attached via the opening 74a. After that, as shown in FIG. 9, the detachable cover 56 is attached to the cover main body 52. Then, after adjusting the rotation angle of the base 58 with respect to the cover body 52 so that the diamond wheel 6 projects from the base surface 84a by a desired amount of protrusion, the wing nut 96 is tightened to bring the base 58 and the removable cover 56 together. It is fixed to the cover body 52.

In the dust collecting cover 2 of the present embodiment, with the removable cover 56 removed, the base 58 is rotated with respect to the cover body 52 so that the diamond wheel 6 protrudes from the base surface 84a, and the grinder 4 It is also possible to perform cutting work by.

As described above, the dust collecting cover 2 according to the embodiment is used for the grinder 4 (example of a cutting machine) for rotating the diamond wheel 6 (example of a cutting blade). The dust collecting cover 2 partially covers the periphery of the diamond wheel 6, and is attached to the cover main body 52 having the opening 74a and the cover main body 52 so as to be relatively movable, and is attached to the object to be cut. A base 58 having a base surface 84a to be abutted against and a removable cover 56 detachably attached to the cover main body 52 so as to cover the opening 74a are provided. In the dust collecting cover 2, the removable cover 56 is non-detachable when the base 58 is at a position where the diamond wheel 6 projects from the base surface 84a with respect to the cover main body 52. In the above configuration, the amount of protrusion of the diamond wheel 6 from the base surface 84a can be adjusted by adjusting the position of the base 58 relative to the cover body 52. In the above configuration, when the grinder 4 performs the cutting work, by attaching the detachable cover 56, the detachable cover 56 covers the opening 74a of the cover main body 52, and the cutting powder leaks to the outside. Can be suppressed. Further, in the above configuration, when the diamond wheel 6 is replaced, the removable cover 56 can be removed so that the diamond wheel 6 can be easily replaced through the opening 74a of the cover body 52. .. Further, in the above configuration, when the diamond wheel 6 is in a position where it protrudes from the base surface 84a, it is prohibited to remove the detachable cover 56. Therefore, it is possible to prevent the removable cover 56 from being accidentally removed when the grinder 4 is used for the work. According to the above-mentioned dust collecting cover 2, the workability when replacing the diamond wheel 6 can be improved by a simple structure.

In the dust collecting cover 2 according to the embodiment, the diamond wheel 6 is attached to the grinder 4 by a locknut 46 (an example of a fastener). As shown in FIG. 6, in the dust collecting cover 2, the locknut 46 is included in the range of the opening 74a when viewed from the direction along the rotation axis of the diamond wheel 6. According to the above configuration, the locknut 46 can be easily attached or detached through the opening 74a of the cover main body 52 with the detachable cover 56 removed. Workability when replacing the diamond wheel 6 can be further improved.

In the dust collecting cover 2 according to the embodiment, the maximum length of the opening 74a is larger than the diameter of the diamond wheel 6. According to the above configuration, the diamond wheel 6 can be taken in and out through the opening 74a of the cover main body 52 with the removable cover 56 removed. Workability when replacing the diamond wheel 6 can be further improved.

In the dust collecting cover 2 according to the embodiment, the removable cover 56 is attached to the cover main body 52. In the above configuration, since the removable cover 56 is attached to the cover main body 52, even if the base 58 is moved relative to the cover main body 52, the removable cover 56 moves relative to the cover main body 52. do not. Therefore, it is possible to secure good sealing performance of the opening 74a of the cover main body 52 by the removable cover 56.

In the dust collecting cover 2 according to the embodiment, a labyrinth structure is formed between the removable cover 56 and the cover main body 52. According to the above configuration, it is possible to secure better sealing performance of the opening 74a of the cover main body 52 by the removable cover 56.

In the dust collecting cover 2 according to the embodiment, the window member 80, which is at least a part of the removable cover 56, is made of a transparent material. According to the above configuration, when the cutting operation is performed by the grinder 4, the state of the diamond wheel 6 and the object to be cut inside the dust collecting cover 2 can be visually recognized from the outside of the dust collecting cover 2.

In the dust collecting cover 2 according to the embodiment, when the base 58 is in the first position (see FIG. 12) where the diamond wheel 6 projects from the base surface 84a with respect to the cover main body 52, the removable cover 56 is the cover main body. It is sandwiched between the 52 and the base 58. In the dust collection cover 2, when the base 58 is in the second position (see FIG. 9) where the diamond wheel 6 does not protrude from the base surface 84a with respect to the cover body 52, the removable cover 56 is the cover body 52 and the base 58. Not sandwiched between. According to the above configuration, the detachable cover 56 can be switched between a removable state and a non-detachable state according to the relative position of the base 58 with respect to the cover main body 52 by a simple configuration.

In the above embodiment, the detachable cover 56 is attached to the cover body 52, but the detachable cover 56 may be attached to the base 58.

In the above embodiment, the configuration in which the base 58 is rotatable with respect to the cover main body 52 has been described, but the base 58 may be translatable with respect to the cover main body 52.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples illustrated above. The technical elements described herein or in the drawings exhibit their technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques illustrated in the present specification or drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes itself has technical usefulness.

2: Dust collection cover 4: Grinder 6: Diamond wheel 8: Body housing 10: Gear housing 12: Bearing box 14: Motor 16: Output shaft 18: Bearing 20: Bearing 22: Battery 24: Control board 26: Slide switch 28: Detection switch 30: Display 32: 1st bevel gear 34: 2nd bevel gear 36: Spindle 38: Bevel gear 40: Bearing 41: Bearing 42: Shaft lock 44: Inner flange 46: Lock nut 52: Cover body 54: Nozzle 56: Detachment Cover 58: Base 60: Left side cover 62: Right side cover 64: Band part 64a: Curved part 64b: Flat plate part 64c: Fastener 64d: Reinforcing plate 64e: Rib 64f: Nut 64g: Hexagon socket head cap screw 66: Cover part 66a: Opening 66b: Flat plate 66c: Cylindrical 66d: Support 66e: Rib 66f: Rib 68: Cover mounting 68a: Flange 68b: Notch 68c: Notch 68d: Notch 70: Mounting screw 72: Nozzle mounting 74 : Detachable cover mounting part 74a: Opening 74b: Side 74c: Seat surface part 76: Base mounting part 78: Frame member 78a: Support piece 78b: Notch 79: Mounting screw 80: Window member 80a: Through hole 80b: Insert piece 80c: Seat surface 81: Opening 82: Side surface 84: Contact 84a: Base surface 86: Support 88: Adjusting part 88a: Long hole 89: Rotating shaft 90: Bolt 92: Washer 94: Washer 96: Butterfly Nut 98: Nut 100: Guide member 100a: Guide wire

Claims (7)

A dust collecting cover used in a cutting machine that rotates a cutting blade.
A cover body that partially covers the periphery of the cutting blade and has an opening,
A base that is movably attached relative to the cover body and has a base surface that abuts on the object to be cut.
A detachable cover that is detachably attached to either the cover body or the base is provided so as to cover the opening.
A dust collecting cover in which the removable cover is non-detachable when the base is at a position where the cutting blade projects from the base surface with respect to the cover main body. The cutting blade is attached to the cutting machine by a fastener, and the cutting blade is attached to the cutting machine.
The dust collecting cover according to claim 1, wherein the fastener is included in the range of the opening when viewed from a direction along the rotation axis of the cutting blade. The dust collection cover according to claim 1 or 2, wherein the maximum length of the opening is larger than the diameter of the cutting blade. The dust collecting cover according to any one of claims 1 to 3, wherein the removable cover is attached to the cover main body. The dust collection cover according to claim 4, wherein a labyrinth structure is formed between the removable cover and the cover body. The dust collecting cover according to any one of claims 1 to 5, wherein at least a part of the removable cover is made of a transparent material. When the base is in the first position where the cutting blade projects from the base surface with respect to the cover main body, the removable cover is sandwiched between the cover main body and the base.
According to claim 1, when the base is in a second position with respect to the cover main body so that the cutting blade does not protrude from the base surface, the removable cover is not sandwiched between the cover main body and the base. Dust collection cover according to any one of 6.

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