WO2017086473A1 - Grinder - Google Patents

Abstract

A grinder is provided with: a motor; a housing for accommodating the motor; a wheel cover for covering a part of a disc-shaped front-end tool which is mounted to a spindle protruding from the housing; a base member protruding from the wheel cover toward the part to be cut of a material to be cut by the front end tool, and provided with a contact plate located on the front end side of the base member in the protruding direction; a mounting member for mounting the base member to the wheel cover so that the position of the contact plate relative to the wheel cover is changeable; and an affixation member for affixing the base member to the wheel cover or the mounting member to determine the position to which the contact plate protrudes from the wheel cover.

Description

Grinder Cross-reference of related applications

This international application claims priority based on Japanese Patent Application No. 2015-227945 filed with the Japan Patent Office on November 20, 2015, and is based on Japanese Patent Application No. 2015-227945. The entire contents are incorporated herein by reference.

This disclosure relates to a grinder that performs processing such as grinding, polishing, and cutting on a workpiece.

The grinder has a spindle that is rotated by a motor. The spindle protrudes from the housing in which the motor is accommodated, and a disc-shaped tip tool is attached to the tip of the spindle. A wheel cover that covers a part of the tip tool is provided on the outer peripheral side of the spindle to which the tip tool is attached. For this reason, when the workpiece is processed by rotating the tip tool by the rotation of the spindle, the wheel cover can suppress scattering of dust generated from the workpiece.

In addition, the tip tool includes a tool for grinding and polishing the workpiece on the plate surface of the tip tool, and a workpiece (hereinafter also referred to as a workpiece) at the outer peripheral edge of the workpiece. There is something to do. When cutting the workpiece with the cutting tool, the user holds the grinder so that the outer peripheral edge of the cutting tool comes into contact with the workpiece and bites the cutting tool into the workpiece. Make it.

When performing such a cutting operation, a base member having a contact plate capable of contacting the material to be cut is used so that the user can position the grinder at a desired position of the material to be cut (for example, a patent) Reference 1).

As described in Patent Document 1, the base member is usually configured by a backing plate and a plate-like fixing portion that protrudes from the back surface opposite to the contact surface of the backing plate to the material to be cut. By attaching the fixing part to the wheel cover, it can be attached to the wheel cover.

In addition, a long hole is formed in the fixed part, a headed male screw is passed through the long hole and the hole provided in the wheel cover, and a wing nut is screwed into the male screw and tightened. Fixed to the wheel cover.

For this reason, the amount of protrusion of the base member from the wheel cover to the backing plate can be adjusted by loosening the tightening of the male screw with the wing nut and moving the base member along the long hole.

Japanese Utility Model Publication No. 61-28683

As described above, since the conventional base member can adjust the amount of protrusion from the wheel cover to the backing plate, the amount of protrusion of the tip tool from the plate surface of the backing plate, that is, the tip of the material to be cut at the time of cutting The amount of biting of the tool (that is, the cutting depth) can be arbitrarily set.

However, since the base member is fixed to the wheel cover by screwing the male screw and the wing nut, if the tightening is loose, the base member is likely to be displaced due to vibrations generated during cutting.

In order to prevent this problem, it is also conceivable to increase the number of screws used for fixing the base member, and to fix the base member to the wheel cover at a plurality of locations. However, if it does in this way, since fastening locations, such as a wing nut, will increase, workability at the time of adjusting the amount of projections of a base member from a wheel cover will fall.

In one aspect of the present disclosure, it is desirable that the grinder can easily and firmly position and fix the base member to the wheel cover.

The grinder according to one aspect of the present disclosure includes a motor, a housing that houses the motor, a spindle that protrudes from the housing and rotates by being driven by the motor in the housing, and a wheel cover.

The wheel cover is disposed on the outer peripheral side of the spindle protruding from the housing, and covers a part of the disc-shaped tip tool attached to the spindle.
Further, the grinder is provided with a contact plate that protrudes from the wheel cover toward the cutting portion of the material to be cut by the tip tool, and that can be brought into contact with the material to be cut by the tip tool on the tip side in the protruding direction. A base member is also provided.

The base member is attached to the wheel cover via the attachment member so that the relative position of the backing plate with the wheel cover can be changed, and is further fixed to the wheel cover or the attachment member via the fixing member. The

For this reason, the relative position of the contact plate with the wheel cover can be determined by the fixing member.
In the grinder of the present disclosure, the base member is fixed to the wheel cover by the mounting member and the fixing member, but the mounting member is simply mounted so that the relative position of the backing plate with the wheel cover can be changed.

Therefore, the mounting member does not need to be tightened to position the base member.
Therefore, according to the grinder of the present disclosure, the amount of protrusion of the base member from the wheel cover, in other words, the relative position of the contact plate with the wheel cover can be adjusted by loosening the fixing by the fixing member. Further, after the adjustment, the base member can be positioned by fixing the base member with the fixing member.

In this state, since the base member is held by the mounting member and the fixing member, it is possible to suppress displacement of the base member due to vibration or the like when the grinder is used. Further, since it is not necessary to tighten the plurality of fixing members in order to suppress the displacement of the base member, the usability of the grinder can be improved.

The mounting member may be configured to swingably mount the base member to the wheel cover.
Here, in the first aspect of the present disclosure, the mounting member includes a main body that is fixed to the periphery of the opening on the side where the outer periphery of the tip tool projects from the wheel cover. And in the main-body part, the hinge which supports a contact plate so that a displacement along the plate | board surface of a tip tool is provided in the location located in the plate | board surface direction one end of a tip tool at the opening part periphery.

The base member includes a guide plate that protrudes from the side opposite to the hinge of the contact plate toward the main body, and the fixing member is configured to fix the guide plate to the main body.
In this way, the backing plate can be fixed to the wheel cover with the hinge of the mounting member, and the relative position with respect to the wheel cover can be changed by turning the hinge as a fulcrum. Become.

In addition, the fixing member fixes the guide plate protruding from the contact plate toward the main body to the main body, so that the protruding amount of the base member from the wheel cover, in other words, the relative position of the contact plate with the wheel cover. Can be positioned.

The mounting member may include a second cover that covers the wheel cover, and the main body may be fixed to the periphery of the opening of the wheel cover via the second cover.
In this case, since the second cover covers the wheel cover, the wheel cover is surrounded by the second cover and the main body, and the main body is firmly fixed to the periphery of the opening of the wheel cover. become.

Therefore, if the mounting member is configured in this manner, the base member can be more firmly fixed to the wheel cover.
In addition, the 2nd cover may be comprised so that the outer periphery of a wheel cover may be covered from the opposite side to the housing of a wheel cover. In this way, the second cover can be attached from the outside of the wheel cover, and the second cover can be easily attached.

In addition, when the wheel cover is for grinding and polishing the workpiece and there is no plate surface protecting portion for protecting the plate surface of the tip tool on the side opposite to the housing, the second cover is attached to the tip tool. It can function as a plate surface protection part.

Further, the mounting member may be fixed to the wheel cover by sandwiching the wheel cover between the second cover and the main body. In this case, for example, if the wheel cover is sandwiched by engaging the opening of the second cover and the main body, the mounting member can be easily fixed to the wheel cover (in other words, one touch). .

Therefore, if the mounting member is configured in this way, the base member can be mounted on the wheel cover with a single touch, improving the workability when mounting the base member and improving the usability of the grinder. be able to.

Further, the fixing member is constituted by a screw portion screwed into a specific position of the main body portion of the mounting member, and the guide plate is inserted with the screw portion and the hinge of the contact plate as a fulcrum. A long hole that guides the rotation to be performed may be provided.

In this way, when the contact plate is rotated with the hinge as a fulcrum, the position of the long hole corresponding to the screw portion changes, so that the user simply tightens the screw portion at the desired position. The board can be positioned.

On the other hand, in the second aspect of the present disclosure, the mounting member is an opening on the wheel cover on the side where a part of the outer periphery of the tip tool projects, and is provided at a position located on one end side in the plate surface direction of the tip tool. It consists of hinges. This hinge is for supporting the contact plate so that it can be displaced along the plate surface of the tip tool, like the hinge of the first aspect described above.

In the base member, a guide plate protruding toward the wheel cover is provided on the side opposite to the hinge of the contact plate, and the fixing member is configured to fix the guide plate to the wheel cover.

For this reason, in the second aspect, the contact plate is directly fixed to the wheel cover by the hinge of the mounting member, and the contact plate is rotated with the hinge as a fulcrum, whereby the position of the contact plate relative to the wheel cover is determined. Can be changed.

Further, the base member (in other words, the contact plate) can be positioned by fixing the guide plate protruding from the contact plate to the wheel cover with the fixing member.
Further, in the second aspect, the contact plate is divided into two on the hinge side and the opposite side of the hinge along the plate surface direction of the tip tool, and the divided first plate portion and second plate portion. And may be connected so as to be able to approach or leave.

In this way, the length of the backing plate can be varied along the plate surface direction of the tip tool. For this reason, even if the size of the wheel cover attached to the grinder is different, a common backing plate can be used.

Also in the second aspect, the fixing member is constituted by a screw portion screwed into a specific position of the wheel cover, and the hinge of the contact plate is inserted into the guide plate in a state where the screw portion is inserted. A long hole may be provided to guide the rotation about the fulcrum.

In this way, as in the first aspect, the position of the long hole corresponding to the screw portion changes when the contact plate is rotated about the hinge as a fulcrum, so that the user can screw the screw plate at a desired position. It is possible to position the contact plate simply by tightening the part.

Next, in a third aspect of the present disclosure, the base member includes a backing plate, and a plate-like fixing portion that protrudes from the back surface opposite to the contact surface of the backing plate to the workpiece. Prepare.
And a mounting member is comprised by the member which mounts so that a fixed part of a base member can be displaced to a wheel cover, and a fixing member fixes a fixing part of a base member to a wheel cover or a mounting member, Position the protruding plate from the wheel cover.

Therefore, even if the grinder is configured in this way, the same effects as those of other grinders of the present disclosure can be obtained.
Here, the grinder of the third aspect may be provided with a base mounting member.

This base mounting member is attached to the cover mounting portion of the housing together with the wheel cover, protrudes from the cover mounting portion to the outside of the wheel cover, and the front end side in the protruding direction is configured as a fixing portion capable of fixing the base member. .

The mounting member is configured to mount the base member to the wheel cover by movably mounting the fixing portion of the base member to the base mounting member, and the fixing member is the base mounting member or the mounting member. On the other hand, the fixing portion of the base member is configured to be fixed.

In this way, the base member can be mounted and fixed to the wheel cover via the base mounting member, the mounting member, and the fixing member. Therefore, even if the grinder is configured in this way, the base member can be easily fixed to the wheel cover as in the case of the other grinders of the present disclosure, and the protruding position of the contact plate from the wheel cover can be easily positioned. Is possible.

Next, the base attachment member includes a first attachment member attached to the cover attachment portion and a second attachment member having a fixing portion. The first attachment member and the second attachment member are attached to the cover. It may be connected so that the length from a part to a fixed part can be adjusted.

In this way, the position of the fixing portion to which the base member is fixed can be changed, and even if the position of the member to which the contact plate is to contact is changed, the position of the contact plate is changed in accordance with the change. It becomes possible to adjust. Moreover, since the base attachment member can adjust the length from a cover attachment part to a fixed part according to the magnitude | size of a wheel cover, a base member can be mounted | worn with a wheel cover from which size differs.

Further, the base mounting member may be fixed to the wheel cover by sandwiching a region from the cover mounting portion to the outer periphery of the wheel cover. If it does in this way, it will become possible to fix the member for base attachment to a wheel cover simply (in other words, one-touch), and the usability of a grinder can be improved.

When the base mounting member is provided on the grinder, the plate surface of the fixing portion of the base member is provided with a long long hole in the direction away from the backing plate, and the fixing member is inserted through the long hole. A screw portion that is screwed to the fixing portion of the base mounting member may be provided.

If it does in this way, it will become possible to fix a base member to a base mounting member by tightening a screw part which constitutes a fixing member, and it is possible to position a projection position from a wheel cover of a target plate by the fixation. Become.

Next, a long hole is provided in the plate surface of the fixing portion of the base member in a direction away from the contact plate, and the fixing member is constituted by a screw portion, and the screw portion and the member constituting the mounting member May be attached to the plate surface protection portion of the wheel cover in a state of being inserted through the long hole of the base member. In addition, the plate | board surface protection part of a wheel cover is a part which covers the plate | board surface of a front-end tool from a housing side in a wheel cover.

In this case, the plate surface protection part of the wheel cover changes the fixing position of the base member by the screw part and arranges the contact plate at the contact position to the material to be cut or at the retracted position on the wheel cover side. It may be configured to be switchable.

And in order to be able to change the position in this way, the fixing position of the base member by the screw portion is changed from the fixing position corresponding to the contact position of the contact plate to the retracting position in the plate surface protection portion. A long hole that can be continuously changed may be provided.

In this case, the base member can be fixed to the plate surface protection portion at an arbitrary position along each long hole by inserting the screw portion through the long hole of the plate surface protection portion and the long hole of the base member. It becomes possible.
In addition, in order to be able to change the position of the base member as described above, a hole for fixing the screw portion at a fixing position corresponding to the contact position of the contact plate, and a contact plate A hole for fixing the screw portion may be provided at a fixed position corresponding to the retracted position.

In this case, although it is necessary to change the fixing position of the screw part to the plate surface protection part of the wheel cover, the contact plate can be positioned and fixed at the contact position or the retracted position even in this way.
When the position of the base member can be changed in this way, the plate surface protecting portion of the wheel cover is engaged with the fixing portion of the base member when the backing plate is in the retracted position, and the base member is An engaging protrusion for positioning may be provided.

On the other hand, the fixing member is not a threaded part that can fix the base member by screwing and tightening, but can be switched between positioning and fixing the base member by a single push operation or pulling operation by the user It may be configured.

If the fixing member is configured in this way, the fixing of the base member with respect to the wheel cover, in other words, the positioning of the contact plate can be easily performed by a single pressing operation or pulling operation of the fixing member (in other words, Can be done with one touch).

Also, a grinder according to another aspect of the present disclosure includes a motor, a housing, a spindle, a wheel cover, a base member, and a fixing member that fixes the base member to the wheel cover.

The fixing member is configured to be switchable between positioning and fixing the base member or being movable by a single pressing operation or pulling operation by the user.
Therefore, even if the grinder is configured in this way, the base member can be fixed to the wheel cover, in other words, the positioning of the contact plate can be easily performed by one pushing operation or pulling operation of the fixing member (in other words, with one touch). ) Will be able to do.

In the case where the contact plate can be positioned with a single touch, the fixing member includes an engagement portion that can be engaged with the base member, and an engagement portion between the engagement position with the base member and the engagement release position. You may provide the holding | maintenance part hold | maintained so that displacement is possible, and the urging member which urges | biases an engaging part to an engagement position.

That is, if the fixing member is configured in this way, the user disengages the engaging portion and the base member by displacing the engaging portion against the urging force of the urging member, The position of the base member with respect to the wheel cover can be changed. Further, the user can fix the base member to the wheel cover by positioning the engaging portion and the base member with the urging force of the urging member, and can position the protruding position of the contact plate.

The engagement and disengagement between the engaging portion and the base member can be switched by a single push operation or pulling operation of the engaging portion, so that the position adjustment and positioning fixing of the target plate with respect to the wheel cover are switched. Can be performed with one touch.

Next, a grinder according to another aspect of the present disclosure includes a motor, a housing, a spindle, a wheel cover, and a base member, and the base member is detachably fixed to the wheel cover via the fixing member. .

According to this grinder, since the base member can be attached to and detached from the wheel cover, the base member can be fixed to the wheel cover, and the material to be cut can be cut. The workpiece can be ground, polished, and the like.

In this way, even when the base member is detachably fixed to the wheel cover by the fixing member, the fixing member fixes the base member to the wheel cover by a single pressing operation or pulling operation by the user. It may be configured to.

In other words, in this way, the base member can be attached to or removed from the wheel cover with a single pressing operation or pulling operation of the fixing member, and the base member can be attached and detached. It can be performed easily (in other words, with one touch).

It is sectional drawing showing the internal structure of a grinder. It is sectional drawing showing the mounting state of the wheel cover to a grinder. It is a top view showing the structure of the whole grinder of 1st Embodiment. It is a perspective view showing the state which removed the base member of 1st Embodiment from the wheel cover. It is a perspective view showing the state which assembled | attached the base member of 1st Embodiment to the wheel cover. It is a perspective view showing the connection state of the base member and mounting member of 1st Embodiment. It is the perspective view which looked at the state which assembled | attached the base member of 1st Embodiment to the wheel cover from the reverse direction of FIG. It is a perspective view showing the state which looked at the grinder of 1st Embodiment from the base member side. It is a perspective view showing the structure of the base member of 2nd Embodiment. It is a perspective view showing the state which assembled | attached the base member of 2nd Embodiment to the wheel cover. It is a top view showing the structure of the whole grinder of 2nd Embodiment. It is a perspective view showing the state which assembled | attached the base member to the base attachment member of 3rd Embodiment. It is a top view showing the state which looked at the base member of Drawing 12 from the contact plate side. It is a perspective view showing the state which assembled | attached the base member of FIG. 12 to the wheel cover. It is a perspective view showing the state which saw the grinder of 3rd Embodiment from the base member side. It is a perspective view showing the base member of 4th Embodiment. It is a perspective view showing the state by which the base member of 4th Embodiment was assembled | attached to the non-contact position of the wheel cover. It is a perspective view showing the state by which the base member of 4th Embodiment was assembled | attached to the normal fixing position of the wheel cover. It is a perspective view showing the structure of the whole grinder of 4th Embodiment. It is a top view showing the structure of the grinder of 4th Embodiment. It is a bottom view showing the structure of the grinder of 4th Embodiment. It is a perspective view showing the state by which the base member of 4th Embodiment was assembled | attached to the non-contact position of the wheel cover of a modification. It is a perspective view showing the state by which the base member of 4th Embodiment was assembled | attached to the normal fixing position of the wheel cover of a modification. It is a perspective view showing the structure of the base member of 5th Embodiment, a mounting member, and a wheel cover. It is a perspective view showing the state which assembled | attached the base member and mounting member of 5th Embodiment to the wheel cover. It is a perspective view showing the structure of the base member and attachment member of 6th Embodiment. It is a perspective view showing the state which separated the base member and mounting member of 6th Embodiment. It is a perspective view showing the state which assembled | attached the base member and mounting member of 6th Embodiment to the wheel cover. It is a perspective view showing the state which assembled | attached the base member to the member for base attachment of 7th Embodiment. It is the perspective view showing the state which looked at the member for base attachment of 7th Embodiment from the reverse direction to FIG. It is a perspective view showing the state which assembled | attached the base member to the wheel cover via the base attachment member of 7th Embodiment. It is sectional drawing showing the state which cut | disconnected the member for base attachment shown in FIG. 31 along the expansion-contraction direction. It is a perspective view showing the state which assembled | attached the base member to the wheel cover via the fixing member of 8th Embodiment. FIG. 34A is a cross-sectional view illustrating an internal configuration when the fixing member illustrated in FIG. 33 is in a fixed state, FIG. 34A illustrates a state in which the fixing member is cut along a direction orthogonal to the plate surface of the wheel cover, and FIG. The state which cut | disconnected the member along the plate | board surface of a wheel cover is represented. FIG. 35A is a cross-sectional view illustrating an internal configuration when the fixing member illustrated in FIG. 33 is in an open state, FIG. 35A illustrates a state in which the fixing member is cut along a direction orthogonal to the plate surface of the wheel cover, and FIG. The state which cut | disconnected the member along the plate | board surface of a wheel cover is represented. It is a perspective view showing the state which assembled | attached the base member to the wheel cover via the mounting member and fixing member of 9th Embodiment. It is sectional drawing showing the internal structure of the mounting member and fixing member shown in FIG. It is a perspective view showing the state which assembled | attached the base member to the wheel cover via the mounting member and fixing member of 10th Embodiment. FIG. 39A is a cross-sectional view showing the internal configuration of the mounting member and the fixing member shown in FIG. 38, FIG. 39A shows a state where the base member is fixed, and FIG. 39B shows a state where the base member is movable. It is a perspective view showing the state which assembled | attached the base member to the wheel cover via the mounting member and fixing member of 11th Embodiment. FIG. 41A is a cross-sectional view showing the internal configuration of the mounting member and the fixing member shown in FIG. 40, FIG. 41A shows a state where the base member is fixed, and FIG. 41B shows a state where the base member is movable.

DESCRIPTION OF SYMBOLS 1 ... Grinder, 12 ... Motor, 24 ... Spindle, 30 ... Inner housing, 40 ... Tip tool, 60 ... Wheel cover, 70, 70A, 70B, 90, 110, 140, 140A, 140B, 140C, 200 ... Base member, 72, 112, 142 ... plate, 73 ... hinge, 74 ... main body, 75, 114, 124, 144, 204 ... fixing part, 76, 96 ... guide plate, 77, 97, 115, 125, 145, 156 ... 80, 80A, 80B ... second cover, 85, 108, 118, 126, 164 ... thumbscrew, 92 ... first plate portion, 94 ... second plate portion, 98 ... shaft portion, 106 ... bearing, 117 ... Rivet, 120, 120A ... Base mounting member, 121 ... First mounting member, 123 ... Second mounting member, 130 ... Coil spring, 154 ... Engaging projection, 152, 1 7 ... male screw, 158 ... wing nut, 170 ... fixing member, 180,190,210 ... mounting member, 175A, 175B, 186,195,216 ... operation unit.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[Basic configuration]
First, a basic internal configuration of a grinder 1 according to first to eleventh embodiments described later will be described.

As shown in FIG. 1, the grinder 1 is a so-called disc grinder that rotates a disc (disc) -shaped tip tool 40 to process a workpiece (grinding, polishing, cutting, etc.), and includes a motor housing 4. The gear housing 6 and the rear cover 8 are mainly configured.

The motor housing 4 is a substantially cylindrical housing and houses the motor 12. The rotating shaft 14 of the motor 12 is disposed so as to protrude toward the gear housing 6.

The rear cover 8 is provided on one end side (right side in FIG. 1) of the motor housing 4 in the central axis direction, and accommodates power supply wiring for driving the motor 12 by receiving power supply from an external power source.

The gear housing 6 is provided on the side opposite to the rear cover 8 of the motor housing 4 (left side in FIG. 1), and houses the first bevel gear 20, the second bevel gear 22, the spindle 24, the bearings 26, 28, and the like.

The first bevel gear 20 is fixed to the rotating shaft 14 of the motor 12 in the gear housing 6. The second bevel gear 22, the spindle 24, and the bearings 26 and 28 are integrally provided in an internal housing 30 configured separately from the gear housing 6, and the internal housing 30 is fitted and fixed in the gear housing 6. As a result, the gear housing 6 is accommodated.

For fixing the inner housing 30 to the gear housing 6, screw holes provided in the same direction as the spindle 24 are used at a plurality of locations around the spindle 24 in each part. That is, it is performed by passing a headed male screw from the inner housing 30 side through the screw hole and screwing with a female screw formed in the screw hole on the gear housing 6 side.

The inner housing 30 is provided with a spindle 24 through a bearing 26 so as to be rotatable. The inner housing 30 has a cylindrical shape coaxial with the central axis of the spindle 24, and is fixed in the gear housing 6 so that the spindle 24 is orthogonal to the rotating shaft 14 of the motor 12.

The second bevel gear 22 is fixed to the spindle 24 and is screwed with the first bevel gear 20 in the gear housing 6 to convert the rotational output of the motor 12 into a rotational force around the axis of the spindle 24.

One end of the spindle 24 is rotatably supported by the gear housing 6 via a bearing 28, and the other end of the spindle 24 protrudes to the outside from the internal housing 30 (in other words, the gear housing 6). .

An inner flange 32 for positioning and fixing the disc-shaped tip tool 40 is provided on the protruding portion of the spindle 24 from the gear housing 6. Further, a screw portion 25 for screwing the lock nut 34 is formed on the outer peripheral portion of the tip of the spindle 24 further than the inner flange 32. The lock nut 34 is for clamping the tip tool 40 with the inner flange 32.

In the grinder 1 configured as described above, the motor 12 rotates when electric power is supplied to the motor 12 through the power supply wiring in the rear cover 8. Then, the rotational output from the motor 12 is transmitted to the spindle 24 via the gear mechanism (the first bevel gear 20 and the second bevel gear 22) in the gear housing 6.

Therefore, as shown in FIG. 1, if the tip tool 40 is fixed to the spindle via the lock nut 34, the tip tool 40 is rotated by the rotation of the motor 12, and operations such as grinding, polishing and cutting are performed. It can be performed. As the tip tool 40 used in the grinder 1 as described above, a grinding wheel, a cutting wheel, a wire brush, and the like can be given.

Also, a fan 15 is provided on the rotating shaft of the motor 12 to introduce outside air from the suction hole of the rear cover 8 and discharge air from the discharge hole 7 provided in the gear housing 6. Due to the rotation of the fan 15, outside air passes around the motor 12, and the motor 12 is cooled.

Next, the portion of the inner housing 30 from which the spindle 24 protrudes has a cylindrical shape that is coaxial with the central axis of the spindle 24 and surrounds the spindle 24, and the wheel cover 60 can be attached and detached as shown in FIG. It functions as a cover mounting portion 31 for fixing to the cover.

The wheel cover 60 is for suppressing dust generated during operations such as grinding, polishing, and cutting from scattering to the operator side, and a part of the tip tool 40 fixed to the spindle 24 (details are omitted in detail). Half) is covered from the gear housing 6 side.

In other words, the wheel cover 60 is disposed so as to face the gear housing side plate surface of the tip tool 40, and extends from the outer peripheral edge of the plate surface protection portion 61 to face the outer peripheral edge of the tip tool 40. And an edge protection part 63 to be arranged.

The plate surface protection part 61 and the edge protection part 63 are integrally formed of a metal plate. Further, the wheel cover 60 shown in FIG. 2 is formed with a curved portion 64 in which the opposite side of the edge protecting portion 63 from the plate surface protecting portion 61 is curved inward in the radial direction of the tip tool 40.

Depending on the application of the wheel cover 60, the outer plate surface protection portion extends on the opposite side of the edge protection portion 63 from the plate surface protection portion 61 so that the tip tool 40 is sandwiched between the plate surface protection portion 61 and the edge protection portion 61. It may be established.

That is, the wheel cover 60 shown in FIG. 2 can be used when cutting the workpiece, but generally, the inner housing 30 of the tip tool 40 is ground on the workpiece using the opposite surface. Used for polishing.

On the other hand, when the wheel cover 60 having the outer plate surface protecting portion cuts the material to be cut at the outer peripheral edge portion (not surrounded by the wheel cover 60) on the side opposite to the wheel cover 60 of the tip tool 40. Used for

Further, in the wheel cover 60, the plate surface protection portion 61 arranged to face the plate surface of the tip tool 40 is attached to the outer periphery of the cover mounting portion 31 of the inner housing 30 so as to be rotatable around the spindle 24.

For this reason, the plate surface protection part 61 is provided with an annular cylindrical part 65 for mounting on the cover attachment part 31.
The cylindrical portion 65 has a part of an annular portion where the plate surface protection portion 61 is not extended, and both sides of the opening are bent to the outside of the annular portion, so that the cover mounting portion 31 is not bent. It is configured as a tightening portion 67 for tightening the cylindrical portion 65 radially inward.

A hole is provided in the tightening portion 67, and a head bolt 68 is passed through the hole and a nut 69 is screwed into the hole cover 60 so that the wheel cover 60 is attached to the inner housing 30 (and thus the grinder 1). It can be firmly fixed (see FIG. 3 etc.).

Next, in the grinder 1 of this embodiment, a cutting tool is used as the tip tool 40 when the material to be cut is cut. The wheel cover 60 is rotated around the spindle 24 so that the semicircular arc portion of the wheel cover 60 is positioned so that the crossing angle with the central axis of the motor housing 4 becomes small (FIG. 3). Etc.).

As a result, at the time of cutting the material to be cut, the tip tool 40 is greatly exposed on one side across the central axis of the motor housing 4. Therefore, if the user holds the grinder 1 so that the outer peripheral edge of the exposed portion of the tip tool 40 is downward, and the outer peripheral edge of the tip tool 40 abuts the material to be cut, the weight of the grinder 1 and the tip tool The material to be cut can be easily cut by the rotation of 40.

Further, when cutting the material to be cut, the user needs to hold the grinder 1 firmly so that the tip tool 40 is not displaced with respect to the material to be cut.
For this reason, the gear housing 6 has a pair of grips 50 for the user to attach to the left and right wall surfaces arranged so as to sandwich the rotating shaft 14 of the motor 12 and the central axis of the spindle 24 from both sides. Screw holes are provided. When the material to be cut is cut, the grip 50 is attached to one screw hole, and the user can hold the grinder 1 firmly by grasping the grip 50 (see FIG. 3 and the like). ).
[First Embodiment]
As shown in FIGS. 3 and 8, the grinder 1 of the present embodiment is configured so that the cutting tool 40 can be positioned at a desired cutting position with respect to the material to be cut when the material to be cut is cut. A base member 70 is provided.

As shown in FIGS. 4, 5, 6, and 7, the base member 70 is disclosed in the opening on the wheel cover 60 on the side where a part (substantially half) of the outer periphery of the tip tool 40 protrudes. The main body 74 as a mounting member and the second cover 80 are assembled.

The second cover 80 includes an edge cover portion 82 that covers the edge protection portion 63 of the wheel cover 60 from the outside, and a plate surface cover that closes the semicircular opening of the wheel cover 60 opposite to the plate surface protection portion 61. Part 84.

The plate surface cover portion 84 is configured to protect the plate surface of the tip tool 40 from the outside by covering the plate surface of the tip tool 40 from the side opposite to the gear housing 6. The plate surface cover portion 84 and the edge cover portion 82 are integrally formed of a metal plate in accordance with the shape of the wheel cover 60.

In the second cover 80, mounting pieces 86 and 87 for fixing the main body portion 74 with screws 88 and 89 are extended at both ends of the edge cover portion 82.
The main body 74 comes into contact with the edge of the opening of the wheel cover 60 covered with the second cover 80 and is screwed to the mounting pieces 86 and 87 of the second cover 80, thereby The wheel cover 60 is sandwiched between the two.

For this reason, the main body 74 has a hollow rectangular shape in accordance with the edge shape of the opening of the wheel cover 60 covered with the second cover 80, and the tip tool 40 passes through the hollow portion to the outside. Protruding. Further, the main body portion 74 is provided with screw holes 78 and 79 for screwing screws 88 and 89 at both ends of the tip tool 40 in the plate surface direction.

On the other hand, the base member 70 includes a backing plate 72 having a shape substantially the same as that of the main body portion 74. The abutting plate 72 is configured by a metal plate having substantially the same shape as the main body portion 74 so as to be laminated on the main body portion 74, and a hollow portion 71 for passing the tip tool 40 is formed on the plate surface. ing.

In the abutting plate 72, one end side in the plate surface direction of the tip tool 40 inserted through the hollow portion 71 is connected to one end side in the plate surface direction of the main body portion 74 via the hinge 73. For this reason, the contact plate 72 can be rotated (swinged) with respect to the main body 74 with the hinge 73 as a fulcrum, and the relative position with respect to the wheel cover 60 is changed by the rotation.

The guide plate 72 is provided with a guide plate 76 that protrudes from the side opposite to the hinge 73 toward the main body 74 along the edge cover portion 82 of the second cover 80. Further, a fixing portion 75 for fixing the guide plate 76 via a thumbscrew 85 is provided on the opposite side of the main body portion 74 from the hinge 73. The guide plate 76 protruding from the contact plate 72 is formed with a long hole 77 through which the thumbscrew 85 screwed from the end cover portion 82 side of the second cover 80 is inserted into the fixing portion 75. Yes.

Therefore, according to the grinder 1 of this embodiment, the contact plate 72 of the base member 70 can be firmly assembled to the wheel cover 60 via the main body 74 and the second cover 80. In addition, since the contact plate 72 can be rotated with the hinge 73 as a fulcrum, the relative position with the wheel cover 60 can be easily adjusted. After the adjustment, the contact plate 72 can be easily positioned and fixed by tightening the thumbscrew 85.

In this state, the abutting plate 72 is fixed to the wheel cover 60 by the hinge 73 constituting the mounting member and the butterfly screw 85 constituting the fixing member. The displacement of 72 can be suppressed.
[Second Embodiment]
As shown in FIGS. 9, 10, and 11, in the grinder 1 of the present embodiment, the base member 90 is an opening on the side from which the wheel cover 60 projects a part (substantially half) of the outer periphery of the tip tool 40. It can be fixed directly to the part.

The wheel cover 60 of the present embodiment is for cutting in which a plate surface protection portion 61 is provided not only on the gear housing 6 side where the cylindrical portion 65 is provided, but also on the opposite side across the tip tool 40. To do.

The hollow part 91 for inserting the tip tool 40 is formed in the contact plate of the base member 90 as in the first embodiment. In the present embodiment, the backing plate is adjusted in the plate surface direction of the tip tool 40 inserted through the hollow portion 91 so that the size of the backing plate can be adjusted according to the size of the opening of the wheel cover 60. It is divided into two along.

The divided first plate portion 92 and second plate portion 94 have two plate portions 92 arranged at intervals in order to form the hollow portion 91 in each plate portion 92 and 94. , 94 are slidably fitted to each other.

That is, the frame portion on the second plate portion 94 side is inserted into the two frame portions constituting the first plate portion 92 in the inner direction from the surface facing the two frame portions constituting the second plate portion 94. For this purpose, an insertion hole 93 is formed, and the frame portion of the second plate portion 94 is sized to be inserted into the insertion hole 93. In addition, a ridge is formed on the inner wall of the insertion hole 93, and a groove 95 is formed in the frame portion of the second plate portion 94 according to the ridge.

Therefore, the first plate portion 92 and the second plate portion 94 constituting the contact plate are connected so that the two frame portions arranged with the hollow portion 91 interposed therebetween can be approached or separated from each other. Therefore, according to the present embodiment, even if the size of the opening of the wheel cover 60 changes, the size of the backing plate can be changed corresponding to the size.

In addition, on one end side (specifically, the second plate portion 94 side) of the hollow portion 91 of the contact plate configured by the first plate portion 92 and the second plate portion 94 as described above, one end of the opening portion of the wheel cover is provided. A shaft portion 98 that constitutes a hinge is provided on the side so as to be pivotable (swingable).

On the other hand, a bearing 106 for fitting the shaft portion 98 is provided projectingly at the outer peripheral end portion on one end side of the opening portion of the wheel cover 60. Therefore, a hinge is formed by fitting the shaft portion 98 of the second plate portion 94 to the bearing 106, and the base member 90 rotates with respect to the wheel cover 60 using the shaft portion 98 constituting the hinge as a fulcrum. It will be fixed so that it can swing.

Further, in the base member 90, a guide plate 96 that is in contact with the end portion of the edge protection portion 63 of the wheel cover 60 is provided at an end edge on the side opposite to the shaft portion 98 (that is, the first plate portion 92 side). Projected. The guide plate 96 has a circular arc surface so that the base member 90 does not move away from the edge protection part 63 even if the base member 90 rotates about the hinge.

The guide plate 96 is provided with a long hole 97 that is linear in the protruding direction from the first plate portion 92, and the long hole 97 has an end of the edge protection portion 63 of the wheel cover 60. A thumbscrew 108 screwed into the part fixing position is inserted.

Therefore, also in the grinder 1 of this embodiment, the 1st board part 92 and the 2nd board part 94 which comprise the contact plate of the base member 90 are firmly assembled | attached with respect to the wheel cover 60 similarly to the thing of 1st Embodiment. be able to.

Further, the base member 90 is rotatable via a hinge constituted by the shaft portion 98 on the second plate portion 94 side and the bearing 106 on the wheel cover 60 side. The position can be adjusted easily. After the adjustment, the base member 90 can be easily positioned and fixed by tightening the thumbscrew 108.

In the present embodiment, the guide plate 96 is arranged so as to move along the edge protection portion 63 on the outer periphery of the wheel cover 60. However, as in the first embodiment, the plate surface protection portion of the wheel cover 60 is provided. It may be arranged so as to move along 61. Moreover, you may comprise the guide plate 76 of 1st Embodiment so that it may move along the edge part of the edge cover part 82 of the 2nd cover 80 similarly to the guide plate of this embodiment.
[Third Embodiment]
As shown in FIGS. 12, 13, 14, and 15, in the grinder 1 of the present embodiment, the base member 110 and the gear cover 6 (details) together with the wheel cover 60 are interposed via the base mounting member 120. Is fixed to the inner housing 30).

The base mounting member 120 includes a first mounting member 121 having a cylindrical portion 122 into which the cylindrical portion 65 of the wheel cover 60 can be fitted, and a second mounting member having a fixing portion 124 for fixing the base member 110. 123.

When the first mounting member 121 and the second mounting member 123 are fixed to the cover mounting portion 31 of the inner housing 30 together with the wheel cover 60 via the cylindrical portion 122, the length from the cover mounting portion 31 to the fixing portion 124 is long. It is connected so that it can be adjusted.

That is, the first attachment member 121 and the second attachment member 123 are each an elongated arm portion so that the fixing portion 124 can be disposed outside the edge protection portion 63 of the wheel cover 60. A long hole 125 is formed in the longitudinal direction.

Then, a butterfly screw 126 is inserted into the long hole 125, and by tightening the butterfly screw 126, the length from the cover mounting portion 31 to the fixing portion 124 can be adjusted to fix the position.

The cylindrical portion 122 has a part of an annular portion that is open so that the cylindrical portion 65 of the wheel cover 60 can be externally fitted, and a fastening portion that is bent outward from the annular ring at both ends of the opening. 128 is formed. For this reason, when the cylindrical portion 65 of the wheel cover 60 is externally fitted by the cylindrical portion 122, the fastening portion 128 is disposed outside the fastening portion 67 of the cylindrical portion 65.

In this embodiment, the wheel cover 60 and the base mounting member 120 are simultaneously connected to the inner housing by passing a headed bolt 68 through the holes passing through the tightening portions 67 and 128 and screwing the nut 69 together. It is fixed to 30 cover mounting portions 31.

Next, the base member 110 includes a backing plate 112 and a plate-like fixing portion 114 erected substantially vertically from the plate surface of the backing plate 112. The contact plate 112 is provided with an opening 111 formed along the plate surface of the tip tool 40 protruding from the wheel cover 60, and a fixing portion 114 is provided outside the opening.

The fixing portion 114 is provided so that the plate surface faces the edge protection portion 63 of the wheel cover 60. This is because the fixing portion 114 of the base member 110 can be brought into contact with the fixing portion 124 of the base mounting member 120. A long hole 115 is formed in the fixing portion 114 of the base member 110 in the longitudinal direction along the plate surface of the tip tool 40.

Further, a rivet 117 serving as a mounting member and a wing screw 118 serving as a fixing member, which are disposed in the long hole 115 along the plate surface direction of the tip tool 40, are inserted into the fixing portion 114.

The rivet 117 has a rivet hole provided in the fixing portion 124 and a long hole on the base member 110 side, and is crimped with a tool from both sides in the axial direction to prevent the rivet 117 from being removed on both sides of each hole. It is the type that forms the head of the. In this embodiment, the rivet 117 is used as the mounting member, but a screw such as a male screw may be used.

Therefore, the base member 110 can move in the direction in which the thumbscrew 118 and the rivet 117 are arranged, and the relative position of the base plate 112 with respect to the wheel cover 60 can be adjusted by the movement.

In addition, after the position adjustment of the contact plate 112, the base member 110 can be fixed to the base mounting member 120 and the contact plate 112 can be positioned by tightening the thumbscrew 118.

For this reason, also in the grinder 1 of this embodiment, the effect similar to said each embodiment can be acquired.
[Fourth Embodiment]
As shown in FIGS. 17, 18, 19, 20, and 21, the grinder 1 of the present embodiment is configured to directly fix the base member 140 to the plate surface protection portion 61 of the wheel cover 60. .

Therefore, as shown in FIG. 16, the base member 140 is similar to the base member 110 of the third embodiment. The base plate 142 and a plate-like fixing portion that is erected substantially vertically from the plate surface of the base plate 142. 144, but the plate surface direction of the fixing portion 144 is different from that of the third embodiment.

That is, the abutting plate 142 is provided with an opening 141 formed along the plate surface of the tip tool 40 protruding from the wheel cover 60, and the fixing portion 144 has a plate surface that is the same as the opening 141. They are provided in the same direction.

Therefore, the base member 110 according to the present embodiment allows the tip tool 40 to pass through the opening 141 of the contact plate 142 by bringing the plate surface of the fixing portion 144 into contact with the plate surface protection portion 61 of the wheel cover 60. Will be able to.

The fixing portion 144 extends from the abutting plate 142 in a direction substantially orthogonal to the plate surface of the abutting plate 142, and a long hole 145 is formed in the plate surface of the fixing portion 144 along the longitudinal direction thereof. Has been.

On the other hand, the plate surface protection portion 61 of the wheel cover 60 is provided with a male screw 152 as a mounting member, a male screw 157 and a wing nut 158 as fixing members.
The base member 140 can rotate (swing) with respect to the wheel cover 60 by inserting the male screw 152 into the elongated hole 145 of the fixing portion 144 and screwing the male screw 152 into the screw hole of the wheel cover 60. Next, it is attached to the plate surface protection part 61 of the wheel cover 60.

Further, the base member 140 is attached to the plate surface protection portion 61 of the wheel cover 60 by passing the male screw 157 through the long hole 145 and the hole on the wheel cover 60 side and screwing with the wing nut 158.

Then, the base member 140 is positioned on the wheel cover by tightening the screwing of the male screw 157 and the wing nut 158 with the base member 140 mounted on the wheel cover 60 in this manner.

Further, even when the contact plate 142 is in the non-contact position (retracted position) shown in FIGS. 17 and 19 or in the normal fixed position shown in FIGS. 18, 20, and 21, the wing nut 158 is interposed. In order to fix the base member 140, the plate surface protection part 61 is provided with a curved long hole 156.

The male screw 157 is inserted into the long hole 156 and the long hole 145 of the base member 140 and screwed with the wing nut 158.
For this reason, the base member 140 is fixed to the wheel cover 60 so that the contact plate 142 can move from the non-contact position to the normal fixed position, and the wing nut 158 is tightened at the position of the desired position. The contact plate 142 can be positioned.

Further, the plate surface protection portion 61 of the wheel cover 60 is engaged with the fixing portion 144 of the base member 140 to position the base member 140 when the contact plate 142 is in the non-contact position. A protrusion 154 is also provided.

For this reason, the base member 140 can position the contact plate 142 without tightening the wing nut 158 when the contact plate 142 is in the non-contact position.
In the present embodiment, the male screw 152 is used as the mounting member, but this is for detachably mounting the base member 140 to the wheel cover 60. Therefore, it is not always necessary to use the male screw 152 as the mounting member, and a rivet may be used.
[Modification]
In 4th Embodiment, in order to enable the contact plate 142 to move to a normal fixed position from a non-contact position, it demonstrated that the curved long hole 156 was formed in the plate surface protection part 61 of the wheel cover 60. FIG.

On the other hand, as shown in FIG. 22 and FIG. 23, when the contact plate 142 is in the non-contact position and when it is in the fixed position, the thumbscrew 164 is screwed, respectively. You may enable it to move only in one direction along the long hole 145. For this purpose, screw holes 161 and 162 into which the thumbscrews 164 can be screwed may be provided at two locations on the plate surface protection portion 61 of the wheel cover 60.

Further, in each of the above embodiments, the description has been made assuming that a wing screw or a wing nut is used as a fixing member for positioning and fixing the base plate of the base member. However, this allows the user to easily operate with a finger. Because. Therefore, the fixing member may be a screw or nut that requires a tool for tightening or the like.

Further, in each of the above embodiments, it has been described that the contact plate is provided with an opening for inserting the tip tool 40. However, if the contact plate is arranged at a position away from the tip tool 40, the contact plate will be described. There is no need to provide an opening in the plate.

On the other hand, in each of the above embodiments, the fixing member or mounting member for fixing or mounting the base member to the wheel cover is provided with a screw or nut, and the base member is attached to the wheel cover by screwing or tightening the screw or nut. It was described as being provided.

On the other hand, the fixing member and the mounting member of the present disclosure may be configured such that the base member can be fixed or mounted on the wheel cover with a single operation by one push operation or pull operation. Therefore, the configuration of the fixing member or the mounting member that can be fixed or mounted with one touch in this way will be described as fifth to eleventh embodiments of the present disclosure. [Fifth Embodiment]
As shown in FIGS. 24 and 25, the mounting member and the base member of this embodiment have the same basic configuration as that of the first embodiment. For this reason, in this embodiment, a different point from 1st Embodiment is demonstrated, about the part similar to 1st Embodiment, the same code | symbol as 1st Embodiment is attached | subjected to FIG.

In the present embodiment, the mounting member includes a main body portion 74 on the base member 70A side to which the contact plate 72 is attached via a hinge 73, and a second cover 80A that covers the wheel cover 60.

The main body portion 74 is provided with clamping pieces 78A and 79A for fixing the mounting pieces 86 and 87 of the second cover 80A by bending both end portions in the plate surface direction of the tip tool 40.

The sandwiching piece 78A is extended and bent in the direction of the rotation center axis of the hinge 73 on the hinge 73 side of the main body 74, and the sandwiching piece 79A is on the side opposite to the hinge 73 of the main body 74. The hinge 73 extends in the opposite direction and is bent toward the hinge 73 side.

This is because when the second cover 80A and the main body 74 are connected via the sandwiching pieces 78A and 79A, the connection is difficult to be removed.
Further, the second cover 80A is fixed to the center of the edge cover portion 82 that covers the edge protection portion 63 of the wheel cover 60 from the outside, and is bent and extended toward the plate surface protection portion 61 side of the wheel cover 60. A piece 83 is provided.

For this reason, the second cover 80A is covered with the wheel cover 60, and the second cover 80A is firmly attached to the wheel cover 60 by placing the outer peripheral center portion of the wheel cover 60 between the plate surface cover portion 84 and the fixed piece 83. Can be installed.

Further, attachment pieces 62 and 66 are extended at both ends of the edge protection portion 63 of the wheel cover 60 corresponding to the attachment pieces 86 and 87 of the second cover 80. Accordingly, the mounting pieces 62 and 66 are clamped by the clamping pieces 78A and 79A of the main body 74 together with the mounting pieces 86 and 87 of the second cover 80A when the main body 74 and the second cover 80A are connected. can do.

For this reason, when the contact plate 72 of the base member 70A is mounted on the wheel cover 60 so as to be displaceable, the wheel cover 60 is sandwiched between the second cover 80A and the main body 74, and the mounting pieces 86A, 79A are sandwiched between the mounting pieces 86A, 79A. 87, 62, and 66 may be sandwiched.

Therefore, according to the present embodiment, as in the first embodiment, the second cover 80 and the main body 74 can be connected very easily without using screws. Further, the base member 70 </ b> A can be firmly attached to the wheel cover 60 by the sandwiching pieces 78 </ b> A and 79 </ b> A and the fixing piece 83.
[Sixth Embodiment]
As shown in FIGS. 26 to 28, the mounting member and the base member of the present embodiment have the same basic configuration as that of the first embodiment. For this reason, in this embodiment, differences from the first embodiment will be described, and the same reference numerals as in the first embodiment are given to FIGS. 26 to 28 for the same parts as in the first embodiment, and description thereof will be omitted. .

As shown in FIG. 26, the mounting member of this embodiment includes a main body portion 74 on the base member 70B side to which the contact plate 72 is attached via a hinge 73, and a second cover 80B that covers the wheel cover 60. The two cover 80B is fixed to the hinge 73 of the main body 74.

For this reason, as shown in FIG. 27, a pair of protrusions 73A for rotatably fixing the second cover 80B are provided on both sides of the rotation center axis of the hinge 73 of the main body 74. The mounting piece 86 of the second cover 80B is provided with a pair of protrusions 86A that sandwich the hinge 73 from both sides, and each protrusion 86A is provided with a hole for inserting the protrusion 73A. .

Further, the end of the main body 74 opposite to the hinge 73 is bent in the direction opposite to the contact plate 72 to engage with the mounting piece 87 of the second cover 80B, so that the main body 74 is attached to the second cover. An engagement piece 79B for positioning and fixing to 80B is provided.

The engaging piece 79B has a curved shape so that when the main body 74 is fixed to the second cover 80B, the distal end portion of the mounting piece 87 is brought into contact and deformed outward, and the distal end portion is fitted. It has become.

For this reason, the main body 74 is connected to the second cover 80B due to the elasticity of the engaging piece 79B, and the user opens the engaging piece 79B to the outside, so that the main body 74 and the second cover 80B are opened. Can be disconnected.

Similarly to the fifth embodiment, the second cover 80A extends to the center of the edge cover portion 82 that covers the edge protection portion 63 of the wheel cover 60 from the outside and to the plate surface protection portion 61 side of the wheel cover 60. A fixed piece 83 is provided and bent.

Thus, in this embodiment, the main body portion 74 of the mounting member is fixed to the second cover 80B via the hinge 73 so as to be rotatable.
For this reason, the space between the main body portion 74 and the second cover 80B is expanded to surround the wheel cover 60, and then the space between the main body portion 74 and the second cover 80B is closed to sandwich the wheel cover 60, thereby The member 70B can be easily attached to the wheel cover 60 with one touch.

As shown in FIG. 28, after the mounting, the base member 70B can be firmly held by the engaging piece 79B and the fixing piece 83 so that the base member 70B is not detached from the wheel cover 60.
[Seventh Embodiment]
As shown in FIGS. 29 to 32, in the present embodiment, the base member 110 is fixed to the wheel cover 60 via the base mounting member 120A. In this embodiment, only the configuration of the base mounting member 120A is different from that of the third embodiment, and other configurations such as the base member 110 are the same as those of the third embodiment. For this reason, in FIGS. 29 to 32, the same parts as those of the third embodiment are denoted by the same reference numerals as those of the third embodiment, and the description thereof is omitted.

As shown in FIGS. 29 and 30, the base mounting member 120 </ b> A is used to fix the base member 110 and the first mounting member 121 having a cylindrical portion 122 to which the cylindrical portion 65 of the wheel cover 60 can be fitted. And a second mounting member 123 having a fixing portion 124.

A guide portion 127 for attaching the length from the cover mounting portion 31 to the fixing portion 124 to the first mounting member 121 so as to be adjustable is provided at the distal end portion of the second mounting member 123 on the cylindrical portion 122 side. It has been. This guide part 127 fixes the 2nd attachment member 123 so that a movement is possible with respect to the 1st attachment member 121 by gripping the 1st attachment member 121 from the outside.

Further, the first mounting member 121 is provided with a long hole 125 as in the third embodiment. The elongated hole 125 is provided with a coil spring 130 that connects the first mounting member 121 and the second mounting member 123 and generates a biasing force in a direction in which the first mounting member 121 and the second mounting member 123 approach each other.

Further, in the fixing portion 124 of the second mounting member 123, the plate surface on the guide portion 127 side (in other words, the cylindrical portion 122 side) is in contact with and fixed to the edge protection portion 63 on the outer periphery of the wheel cover 60. A contact member 132 for positioning the portion 124 is provided. The contact member 132 is made of rubber or elastic synthetic resin, and absorbs an impact when the fixed portion 124 contacts the wheel cover 60 and functions as a slip stopper.

Further, in the fixing portion 124, a fitting protrusion 134 capable of fitting an edge portion on one end side in the outer peripheral direction of the edge protection portion 63 of the wheel cover 60 is provided on the plate surface on which the contact member 132 is provided. Yes.

When attaching the base mounting member 120A of the present embodiment thus configured to the wheel cover 60, first, the cylindrical portion 122 is fitted to the cylindrical portion 65 of the wheel cover 60 as shown in FIG.

After that, the fixing portion 124 is pulled to the outside of the wheel cover 60 against the urging force of the coil spring 130 and is released at a desired position, so that the base mounting member 120A is moved to the wheel cover as shown in FIG. 60 can be mounted.

Further, at the time of mounting, the base mounting member 120 </ b> A can be easily fixed to the wheel cover 60 by fitting the fitting protrusion 134 with one end side in the outer circumferential direction of the edge protection portion 63 of the wheel cover 60. Can do.

In addition, after fixing, the fixing member 124 is not displaced from the fixing position with respect to the wheel cover 60 by the contact member 132, so that the base member 110 can be easily and firmly fixed to the wheel cover 60.
[Eighth Embodiment]
As shown in FIG. 33, in the present embodiment, as in the fourth embodiment, the base member 140A is directly fixed to the plate surface protection portion 61 of the wheel cover 60, and the wheel cover 60 is used as a mounting member. The projection 166 is provided so as to project from the plate surface protection unit 61.

As shown in FIGS. 34A and 35A, the protrusion 166 has a columnar shape, and the diameter of the tip portion on the opposite side to the plate surface protection portion 61 is large.
Further, the plate surface protection portion 61 of the wheel cover 60 is provided with three protrusions 166. As shown in FIG. 33, two of the three protrusions 166 pass the base tool 140A through the tip tool 40 into the opening 141 of the pad plate 142 so that the pad plate 142 comes into contact with the material to be cut. Used to place. The other protrusion 166 is used for disposing the contact plate 142 at a non-contact position where the contact plate 142 does not contact the material to be cut.

That is, the two protrusions 166 that arrange the base member 140A at the contact position with the material to be cut are arranged at a predetermined interval. The other protrusion 166 is perpendicular to a straight line connecting the two protrusions 166 for arranging the contact position and passes through one of the two protrusions 166 with a certain distance from the one protrusion 166. Has been placed.

In addition, the fixing portion 144 of the base member 140A is provided with two insertion holes 147 through which the two protrusions 166 provided at regular intervals in the plate surface protection portion 61 of the wheel cover 60 can be inserted simultaneously. It has been. In addition, in the fixing portion 144 of the base member 140A, the periphery of the two insertion holes 147 is a mounting portion 146 that is wider than the other portions and is easily mounted on the wheel cover 60.

The mounting portion 146 is provided with a fixing member 170 disposed between the wheel cover 60 and the plate surface protection portion 61 for fixing the base member 140A to the plate surface protection portion 61 with one touch. .

As shown in FIGS. 35B and 36B, the fixing member 170 has a flat box shape, a case 171 having an opening substantially the same shape as the plate surface of the mounting portion 146 of the base member 140A, and two protrusions in the case 171. And a pair of clamping members 174A and 174B provided so as to be capable of clamping 166.

The pair of sandwiching members 174A and 174B is configured as a frame having a size that divides the opening into approximately two when the case 171 is viewed from the opening side. As shown in FIG. The leaf springs 178A and 178B are arranged on the outermost side in the case 171.

As shown in FIGS. 34A and 35B, the inner frames of the holding members 174A and 174B respectively correspond to the side walls of the protrusions 166 so that the two protrusions 166 can be held in this arrangement position. The semicircular contact portions 176A, 177A, and 176B, 177B are provided.

Further, the outer frame of each clamping member 174A, 174B protrudes outside the case 171 and is pressed against the case 171 by the user so that each clamping member resists the biasing force of the leaf springs 178A, 178B. Operation portions 175A and 175B for displacing 174A and 174B into the case 171 are provided.

The operation portions 175A and 175B and the inner frames of the holding members 174A and 174B are connected by connecting portions 179A and 179B.
Therefore, when the operation portions 175A and 175B are pushed into the case 171, the contact portions 176A, 177A and 176B and 177B are in the same direction as the operation portions 175A and 175B, respectively, as shown in FIGS. 35A and 35B. Thus, each protrusion 166 is opened.

Note that a flange portion 172 in which a screw hole for fixing to the fixing portion 144 of the base member 140A with a screw 159 is formed on the outer side of the case 171 of the fixing member 170.
As described above, according to the present embodiment, the base member 140A is easily fixed to and removed from the plate surface protection portion 61 of the wheel cover 60 by pushing the operation portions 175A and 175B of the fixing member 170 toward the case 171. be able to.

Further, the plate surface protection portion 61 of the wheel cover 60 is provided with three protrusions 166 as mounting members. Then, by changing the protrusion 166 to be clamped by the clamping members 174A and 174B of the fixing member 170, the fixing position of the base member 140A with respect to the wheel cover 60 can be set to either the contact position with respect to the member to be cut or the non-contact position. Can be changed easily.
[Ninth Embodiment]
As shown in FIG. 36, the mounting member 180 of the present embodiment is configured to detachably fix the base member 140B to the plate surface protection portion 61 of the wheel cover 60 and pull the operating portion 186 provided on the mounting member 180. Thus, the position of the base member 140B can be adjusted.

Note that the base member 140B of the present embodiment has the same basic configuration as the base member 140 of the fourth embodiment shown in FIG. 16, but the fixed portion 144 is provided at substantially equal intervals instead of the long holes 145. A plurality of mounting holes 149 are provided.

The mounting member 180 includes a case 181 having a rectangular box shape with one side opened. On both sides of the opening portion of the case 181, flange portions 183 that are fixed to the plate surface protection portion 61 of the wheel cover 60 via a pair of screws 184 are provided.

The case 181 is screwed to the wheel cover 60 so that the opening faces the plate surface protection portion 61 side. However, the base member 140B is interposed between the case 181 and the plate surface protection portion 61 by the flange portion 183. An insertion hole 182 for inserting the fixing portion 144 is formed.

The base member 140B can adjust the position of the contact plate 142 with respect to the wheel cover 60 when the fixing portion 144 is inserted and moved through the insertion hole 182 of the case 181.

As shown in FIG. 37, a fixing member 188 having a pair of protrusions 189 that can be simultaneously inserted into two mounting holes 149 provided in the fixing portion 144 of the base member 140B is provided in the case 181. .

On the opposite side of the fixing member 188 from the protrusion 189, a rod-shaped operation protrusion 187 that protrudes out of the case 181 through a hole provided in the case 181 is provided. In addition, a coil spring 185 that is provided around the operation protrusion 187 and biases the fixing member 188 toward the fixing portion 144 of the base member 140B is housed in the case 181.

An operation portion 186 for pulling and operating the operation protrusion 187 outside the case 181 is provided at the distal end portion of the operation protrusion 187.
According to the mounting member 180 of the present embodiment configured as described above, the fixing portion 144 of the base member 140B can be positioned and fixed to the wheel cover 60 by the fixing member 188 provided in the case 181.

Further, by pulling the operation portion 186, the fixing portion 144 of the base member 140B can be moved, so that the position of the contact plate 142 with respect to the wheel cover 60 can be easily adjusted with one touch.

Therefore, fixing and position adjustment of the base member 140B can be performed very easily without using a screw.
In the present embodiment, the protrusion 189 of the fixing member 188 functions as the engaging portion of the present disclosure, the case 181 functions as the holding portion of the present disclosure, and the coil spring 185 functions as the biasing member of the present disclosure. .
[Tenth embodiment]
As shown in FIG. 38, the mounting member 190 of the present embodiment detachably fixes the base member 200 to the plate surface protection portion 61 of the wheel cover 60 and pushes a part of the operation portion 195 provided on the mounting member 190. By being operated, the position of the base member 200 can be adjusted.

In the base member 200 of the present embodiment, the contact plate 202 and the fixing portion 204 are separated from each other, and the contact plate 202 has a contact surface with a workpiece to be connected to the fixing portion 204. A plate-like projecting piece 203 erected on the back surface on the opposite side is provided.

The abutting plate 202 is fixed by disposing the protruding piece 203 so as to overlap the fixing portion 204, passing the male screw 205 through the hole provided in the overlapping portion, and screwing the wing nut 206 into the male screw 205. It is fixed to the part 204. For this reason, in this embodiment, the contact angle to the to-be-cut member of the contact plate 202 can be adjusted by loosening the screwing of the male screw 205 and the wing nut 206.

Further, the fixing portion 204 is provided with a plurality of mounting holes 208 for position adjustment and fixing at substantially equal intervals along the longitudinal direction thereof. The mounting hole 208 is an elongated hole that is elongated in a direction orthogonal to the longitudinal direction of the fixed portion 204 (in other words, the arrangement direction of the mounting holes 208).

The mounting member 190 has a main body portion 191 fixed at both ends to the plate surface protection portion 61 of the wheel cover 60 via screws 193, and an operation portion 195 sandwiched between the main body portion 191 and the wheel cover 60. And a pair of projecting pieces 192 erected.

In order to hold the fixing portion 144 movably in the longitudinal direction by inserting the fixing portion 204 of the base member 200 between the main body portion 191 and the plate surface protecting portion 61 on the surface on the plate surface protecting portion 61 side. Are provided.

As shown in FIG. 39, the operation unit 195 is provided to be rotatable around the support shaft 194 with respect to the support shaft 194 provided between the pair of projecting pieces 192 of the mounting member 190. A protrusion 196 that can be fitted into the mounting hole 208 of the fixing portion 204 is provided at the lower end portion of the base member 200 on the contact plate 202 side. Further, the projection 196 of the operation portion 195 is urged toward the fixed portion 204 by a torsion spring 197 provided on the support shaft 194.

For this reason, in the mounting member 190 of this embodiment, when the user presses the opposite side of the operation portion 195 to the fixing portion 204 toward the fixing portion 204, the protrusion 196 is fixed to the fixing portion as shown in FIG. 39A. Apart from 204, the position of the contact plate 142 with respect to the wheel cover 60 can be adjusted.

Further, when the user stops the pushing operation of the operation portion 195, the projection 196 of the operation portion 195 is brought into contact with the fixing portion 204 by the urging force of the torsion spring 197. In this state, when the base member 200 is moved with respect to the operation portion 195, the protrusion 196 is fitted into the mounting hole 208 of the fixing portion 204 as shown in FIG. Positioning and fixing.

Therefore, even if the mounting member 190 of the present embodiment is used, the position of the contact plate 202 with respect to the wheel cover 60 can be easily adjusted with one touch, and the base member 200 can be fixed and adjusted without using a screw. It can be done very easily.

In the present embodiment, the projection 196 of the operation unit 195 functions as an engagement unit of the present disclosure, the projecting piece 192 functions as a holding unit of the present disclosure, and the torsion spring 197 functions as a biasing member of the present disclosure. To do.
[Eleventh embodiment]
As shown in FIG. 40, the mounting member 210 according to the present embodiment is configured such that the base member 140 </ b> C is detachably fixed to the plate surface protection portion 61 of the wheel cover 60 and the operation portion 216 provided on the mounting member 210 is pushed. Thus, the position of the base member 140C can be adjusted.

The base member 140C of the present embodiment has the same basic configuration as the base member 140 of the fourth embodiment shown in FIG. 16, but the elongated holes 145 of the fixing portion 144 are elongated at substantially equal intervals. A plurality of mounting holes 148 having a diameter larger than the width of 145 are provided.

The mounting member 210 includes a case 211 for holding the fixing portion 144 movably in the longitudinal direction through the fixing portion 144 of the base member 140C, and a space between the case 211 and the plate surface protection portion 61 of the wheel cover 60. A plate-like fixing base 212 is provided.

The case 211 is for holding the fixing portion 144 so that the plate surface of the fixing portion 144 is parallel to the plate surface protection portion 61 of the wheel cover 60. Screws 214 are provided on both sides of the fixing portion 144. A flange portion 213 is provided for fixing to the wheel cover 60 via the.

41, the entire case 211 including the flange portion 213 is placed on the plate surface protection portion 61 of the wheel cover 60 with the fixing base 212 interposed therebetween. Then, the mounting member 210 is fixed to the plate surface protection unit 61 by passing a screw 214 through holes provided in the flange portion 213 and the fixing base 212 and screwing the screw 214 into the screw hole of the plate surface protection unit 61. Is done.

In the case 211, a rod-shaped movable member 217 is provided. The diameter of the movable member 217 is smaller than the width of the long hole 145 of the fixed portion 144, and the distal end portion of the movable portion 217 on the fixed base 212 side has a large diameter larger than the width of the long hole 145. Yes.

As shown in FIG. 41A, the large diameter portion is inserted into the mounting hole 148 of the fixing portion 144 to prevent the fixing portion 144 of the base member 140C from moving, and the base member with respect to the wheel cover 60 is prevented. It is the engaging part 218 for positioning 140C.

Further, the side of the movable member 217 opposite to the engaging portion 218 protrudes from the case 211 through a hole provided in the case 211, and the tip portion thereof is connected to the operation portion 216.
In addition, a hole for bringing the engaging portion 218 into contact with the fixing base 212 is provided on the fixing base 212 side of the case 211, and the fixing base 212 is fitted into the hole to be engaged with the engaging portion. An annular protrusion 219 is provided so as to surround the outer periphery of 218.

In addition, a coil spring 215 is provided between the operation unit 216 and the case 211 so as to surround the movable member 217, and the movable member 217 is urged in a direction away from the case 211 by the coil spring 215. ing.

According to the mounting member 210 of the present embodiment configured as described above, the engagement portion 218 at the distal end of the movable member 217 is inserted into the attachment hole 148 of the fixing portion 144 of the base member 140C, so that the wheel cover 60 is provided. On the other hand, the base member 140C can be positioned and fixed.

Also, as shown in FIG. 41B, by pushing the operation portion 216, the engagement portion 218 can be moved to the fixed base 212 side and the engagement portion 218 can be separated from the mounting hole 148. In this state, since the base member 140C can be moved in the longitudinal direction while the small diameter portion of the movable member 217 is inserted into the long hole 145, the position of the contact plate 142 with respect to the wheel cover 60 is also You can easily adjust with one touch.

Further, when the pushing operation of the operation portion 216 is stopped, the engaging portion 218 moves to the fixing portion 144 side of the base member 140C by the urging force of the coil spring 215. For this reason, when the base member 140C is displaced in the longitudinal direction of the fixing portion 144 in this state, the engaging portion 218 is inserted into the mounting hole 148 of the base member 140C, and the base member 140C is fixed.

Therefore, even if the mounting member 210 of the present embodiment is used, the position of the contact plate 142 with respect to the wheel cover 60 can be easily adjusted with one touch, and the base member 140C can be fixed and adjusted without using a screw. It can be done very easily.

In the present embodiment, the operation unit 216 and the movable member 217 provided with the engaging portion 218 at the tip function as a fixed member of the present disclosure, and the case 211 functions as a holding unit of the present disclosure. The coil spring 215 functions as a biasing member of the present disclosure.

As mentioned above, although embodiment of this indication was described, this indication is not limited to an embodiment, and can take various modes within the range which does not deviate from the gist of this indication.
For example, in the first embodiment and the second embodiment, the guide plates 76 and 96 are provided with the long holes 77 and 97, and the thumbscrews 85 and 108 inserted through the long holes 77 and 97 are tightened, whereby the wheel cover 60 is fixed. The description has been made assuming that the contact plates 72 and 92 are positioned.

However, the guide plates 76 and 96 are displaceably supported by the mounting members 180, 190, and 210 of the ninth to eleventh embodiments and operate the operation portions 186, 195, and 216 of the mounting members 180, 190, and 210. By doing so, you may make it fix to a desired position.

In other words, the functions of one constituent element in each of the above-described embodiments or modifications may be provided in a plurality of constituent elements, or the functions of the plurality of constituent elements are integrated into one constituent element. May be. In addition, a part of the configuration in each of the above-described embodiments or modifications may be omitted, and may be added to or replaced with the configuration of the other embodiments. That is, all aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

Claims (22)

1. A motor,
   A housing for housing the motor;
   A spindle protruding from the housing and driven and rotated by the motor in the housing;
   A wheel cover disposed on the outer peripheral side of the spindle protruding from the housing and covering a part of a disc-shaped tip tool attached to the spindle;
   A base member that protrudes from the wheel cover toward the cutting portion of the material to be cut by the tip tool and has a contact plate that can contact the material to be cut by the tip tool on the tip side in the protruding direction. When,
   A mounting member for mounting the base member to the wheel cover so that a relative position of the base plate with the wheel cover can be changed;
   A fixing member that positions the protruding position of the backing plate from the wheel cover by fixing the base member to the wheel cover or the mounting member;
   A grinder equipped with.
2. The grinder according to claim 1, wherein the mounting member is configured to swingably mount the base member to the wheel cover.
3. The mounting member is
   A main body fixed to the periphery of the opening on the side from which a part of the outer periphery of the tip tool protrudes in the wheel cover;
   In the main body portion, provided at a position located at one end side in the plate surface direction of the tip tool at the periphery of the opening portion, and a hinge for supporting the contact plate displaceably along the plate surface of the tip tool;
   With
   The base member includes a guide plate that protrudes toward the main body from the side opposite to the hinge of the pad.
   The grinder according to claim 1, wherein the fixing member is configured to fix the guide plate to the main body portion.
4. The mounting member includes a second cover that covers the wheel cover,
   The grinder according to claim 3, wherein the main body is fixed to the periphery of the opening of the wheel cover via the second cover.
5. The grinder according to claim 4, wherein the second cover is configured to cover an outer periphery of the wheel cover from a side opposite to the housing of the wheel cover.
6. The grinder according to claim 5, wherein the mounting member is fixed to the wheel cover by sandwiching the wheel cover between the second cover and the main body.
7. The fixing member is constituted by a screw portion screwed into a specific position of the main body portion of the mounting member,
   7. The guide plate according to claim 3, wherein the guide plate is provided with a long hole that guides rotation about the hinge of the contact plate in a state where the screw portion is inserted. The grinder described in the paragraph.
8. The mounting member is an opening on the wheel cover where a part of the outer periphery of the tip tool projects, and is provided at a position located on one end side in the plate surface direction of the tip tool. Consists of hinges that are displaceably supported in the surface direction of the tool,
   In the base member, a guide plate that protrudes toward the wheel cover is provided on the opposite side of the contact plate from the hinge.
   The grinder according to claim 1, wherein the fixing member is configured to fix the guide plate to the wheel cover.
9. The abutting plate is divided into two along the plate surface direction of the tip tool, the hinge side and the opposite side of the hinge, and the divided first plate portion and second plate portion approach or The grinder according to claim 8, wherein the grinder is detachably connected.
10. The fixing member is composed of a threaded portion screwed into a specific position of the wheel cover,
    The grinder according to claim 8 or 9, wherein the guide plate is provided with a long hole that guides rotation about the hinge of the abutting plate in a state where the screw portion is inserted. .
11. The base member includes the backing plate, and a plate-like fixing portion protruding on the back surface opposite to the contact surface of the backing plate to the material to be cut.
    The mounting member is configured by a member that mounts the fixed portion of the base member to the wheel cover so as to be displaceable,
    The fixing member is configured to position a protruding position of the cover plate from the wheel cover by fixing a fixing portion of the base member to the wheel cover or the mounting member.
    The grinder according to claim 1 or claim 2.
12. For mounting the base, which is attached to the cover mounting portion of the housing together with the wheel cover, protrudes from the cover mounting portion to the outside of the wheel cover, and has a distal end in the protruding direction as a fixing portion capable of fixing the base member. Element,
    The mounting member is configured to mount the base member to the wheel cover by movably mounting the fixing portion of the base member to the base mounting member.
    The said fixing member is comprised so that the protrusion position from the said wheel cover of the said cover plate may be positioned by fixing the fixing | fixed part of the said base member with respect to the said base attachment member or the said mounting member. The grinder according to 11.
13. The base mounting member is:
    A first attachment member attached to the cover attachment portion;
    A second mounting member having the fixing portion;
    The grinder according to claim 12, wherein the first mounting member and the second mounting member are connected so that the length from the cover mounting portion to the fixing portion can be adjusted.
14. The grinder according to claim 12 or 13, wherein the base mounting member is fixed to the wheel cover by sandwiching a region from the cover mounting portion to the outer periphery of the wheel cover.
15. On the plate surface of the fixed portion of the base member, a long hole is provided in a direction away from the contact plate,
    The fixing member includes a screw portion that is screwed into the fixing portion of the base mounting member in a state of being inserted through the elongated hole, and the base member can be fixed to the base mounting member by tightening the screw portion. The grinder according to any one of claims 12 to 14, which is:
16. On the plate surface of the fixed portion of the base member, a long hole is provided in a direction away from the contact plate,
    The fixing member includes a screw portion, and the members constituting the screw portion and the mounting portion respectively cover the plate surface of the tip tool from the housing side in a state of being inserted through the long hole of the base member. It is attached to the plate surface protection part of the wheel cover,
    The plate surface protection portion changes the fixing position of the base member by the screw portion constituting the fixing member, and arranges the abutting plate at a contact position to the material to be cut, or the wheel cover side The grinder according to claim 11, wherein the grinder is configured to be switchable to be disposed at the retracted position.
17. The plate surface protecting portion has a length that allows the base member to be fixed at a fixed position by the screw portion continuously from a fixing position corresponding to the contact position of the abutting plate to a fixing position corresponding to the retracted position. Holes are provided,
    The screw portion is inserted into the long hole of the plate surface protection portion and the long hole of the base member, and the base member can be fixed to the plate surface protection portion at an arbitrary position along each long hole.
    The grinder according to claim 16.
18. The plate surface protection portion includes a hole for fixing the screw portion at a fixed position corresponding to the contact position of the contact plate, and the screw portion at a fixed position corresponding to the retracted position of the contact plate. The grinder according to claim 16, wherein a hole is provided for fixing the screw.
19. The said plate surface protection part is provided with the engagement protrusion which engages with the said fixing | fixed part of the said base member and positions the said base member when the said contact plate exists in the said retracted position. The grinder according to any one of claims 18 to 18.
20. The fixing member is configured to be switchable between positioning and fixing or movement of the base member by a single pressing operation or pulling operation by a user. The grinder according to any one of 11 to 14.
21. A motor,
    A housing for housing the motor;
    A spindle protruding from the housing and driven and rotated by the motor in the housing;
    A wheel cover disposed on the outer peripheral side of the spindle protruding from the housing and covering a part of a disc-shaped tip tool attached to the spindle;
    A base member that protrudes from the wheel cover toward the cutting portion of the material to be cut by the tip tool and has a contact plate that can contact the material to be cut by the tip tool on the tip side in the protruding direction. When,
    A fixing member for fixing the base member to the wheel cover so that the relative position of the base plate with the wheel cover can be changed;
    And the fixing member is configured so that a user can switch whether the base member is positioned and fixed or moved by one touch.
22. A motor,
    A housing for housing the motor;
    A spindle protruding from the housing and driven and rotated by the motor in the housing;
    A wheel cover disposed on the outer peripheral side of the spindle protruding from the housing and covering a part of a disc-shaped tip tool attached to the spindle;
    A base member that protrudes from the wheel cover toward the cutting portion of the material to be cut by the tip tool and has a contact plate that can contact the material to be cut by the tip tool on the tip side in the protruding direction. When,
    A fixing member for detachably fixing the base member to the wheel cover;
    A grinder equipped with.

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