JP2012176474A - Disk grinder and cover to be mounted thereon - Google Patents

Abstract

An object of the present invention is to improve the workability of surface grinding work using a portable disk grinder.
An attachment portion 33 is provided in a cover body 32 of a dust collection cover 31, the attachment portion 33 is fixed to a boss portion 15 a of a gear case 15, and the dust collection cover 31 is attached to the disc grinder 11. A handle stand 41 is integrally provided on the top wall 32 b of the cover body 32. The handle stand 41 is composed of a semi-cylindrical stand 41a protruding from the top wall 32b on the opposite side to the opening of the cover body 32, and a circular handle 41b provided at the upper end of the stand 41a, and the dust collecting cover 31 is a disc grinder. 11, the axis of the handle 41 b is aligned with the axis of the spindle 16.
[Selection] Figure 2

Description

  The present invention relates to a portable disc grinder used for surface grinding work of a work material and a cover that is attached to the disc grinder and covers a disc-shaped tip tool.

  A portable disk grinder equipped with a disk-shaped (wheel-shaped) tip tool is often used for a surface grinding operation for flatly grinding the surface of a work material such as concrete or stone.

  The disc grinder includes a cylindrical case that accommodates a drive source such as an electric motor or an air motor, and a cylindrical boss portion is provided at the front end side of the case perpendicular to the axial direction of the case. . A spindle serving as an output shaft of the disc grinder protrudes from the boss portion, and a tip tool is attached to the tip of the spindle. The spindle is connected to a drive source via a gear mechanism, and when the drive source is activated, the tip tool is rotationally driven by the drive source together with the spindle.

  The disc grinder is equipped with a dust collection cover, also called a dust collection adapter, in order to prevent scattering of dust and the like generated during the grinding operation. This dust collection cover is formed in a cup shape with a peripheral wall that covers the entire circumference of the tip tool and a top wall that covers the back side, and the mounting portion provided on the top wall is fixed to the boss portion. Mounted on disc grinder.

  The surface grinding operation using such a disc grinder is performed by pressing the entire surface of the tip tool uniformly against the surface of the work material and moving it forward, backward, left and right. Therefore, it is difficult to hold only the case portion of the disc grinder and uniformly press the entire surface of the tip tool against the work material.

  Therefore, in a conventional disc grinder, a rod-like handle is attached to a screw hole provided in a side portion of the case, and in addition to the case portion, the handle can be gripped to perform a grinding operation (see, for example, Patent Document 1). .

JP 2004-249428 A

  However, in the structure in which the handle is attached to the screw hole provided in the side portion of the disc grinder, the handle is arranged so as to be displaced in the radial direction with respect to the spindle center. Therefore, it is difficult to apply a force so that the entire surface of the tip tool is uniformly pressed against the surface of the work material by grasping the handle.

  On the other hand, the structure is designed so that force can be applied to the tip tool from directly above by fixing the stay in the screw hole of the case and using this stay to place the handle on the spindle axis. It is done.

  However, in this structure, since the screw hole of the case is displaced from the spindle center, the stay has a complicated shape, and it is difficult to accurately position the handle on the spindle shaft with the complicated shape of the stay. The problem will arise.

  Further, since the positions and sizes of the screw holes provided in the case vary depending on the type of the disc grinder, there arises a problem that it is necessary to prepare a dedicated stay for each disc grinder.

  An object of the present invention is to improve workability of surface grinding work using a portable disc grinder.

  The disc grinder of the present invention is a portable disc grinder in which a disc-shaped tip tool is attached to a spindle, and includes a peripheral wall that covers the entire circumference of the tip tool and a top wall that covers the back side, and one end is open. A cover body formed in a cup shape, a mounting portion provided on the top wall and fixed to a boss portion of the disc grinder from which the spindle protrudes, and the opening from the top wall to the top wall is opposite to the opening A stand that protrudes toward the side, and a handle that is provided at an upper end of the stand and is disposed on the spindle shaft when the mounting portion is fixed to the boss portion. To do.

  The disc grinder of the present invention is characterized in that the handle is attached to the stand so that the angle can be adjusted.

  The disc grinder according to the present invention is characterized in that the handle is detachably provided on the stand and can be exchanged for a plurality of types of handles having different shapes.

  The disc grinder of the present invention is characterized in that the stand is detachably attached to the top wall.

  The cover of the present invention is a cover that is attached to a portable disc grinder having a disc-shaped tip tool attached to a spindle and covers the tip tool, and is provided with a peripheral wall and a top wall, and has a cup shape with one end opened. A cover body formed on the top wall, a mounting portion provided on the top wall and fixed to a boss portion of the disc grinder from which the spindle protrudes, and the top wall facing away from the opening from the top wall. And a stand provided at the upper end of the stand, and a handle disposed on the spindle shaft when the mounting portion is fixed to the boss portion.

  The cover of the present invention is characterized in that the handle is attached to the stand so that the angle can be adjusted.

  The cover of the present invention is characterized in that the handle is detachably provided on the stand and can be exchanged for a plurality of types of handles having different shapes.

  The cover of the present invention is characterized in that the stand is detachably attached to the top wall.

  According to the present invention, when the cover is attached to the disc grinder, the handle is disposed on the spindle axis, and therefore, a pressing force can be applied to the tip tool from directly above using the handle. Thereby, the operation | work which presses the whole surface of a front-end | tip tool uniformly on the surface of a workpiece can be facilitated, and the workability | operativity of the surface grinding operation using a disk grinder can be improved. In addition, since the handle is provided at the upper end of the stand provided on the cover, the handle can be easily and accurately positioned on the spindle axis with the stand having a simple shape by attaching the cover to the disc grinder. it can. In addition, since the handle is provided at the upper end of the stand provided on the cover, the handle can be easily and surely secured by attaching the cover to a plurality of types of disc grinders with different shapes such as cases. Can be positioned on the axis.

  According to the present invention, since the handle is attached to the stand so that the angle can be adjusted, the workability of the surface grinding work using the disc grinder is further improved by adjusting the handle angle to an angle that is easy for the operator to grip. be able to.

  According to the present invention, the handle can be attached to and detached from the stand so that it can be exchanged with a plurality of types of handles having different shapes. By replacing the handle with a shape that is easy to grip according to the preference of the operator, The workability of the surface grinding work using the disc grinder can be further enhanced.

  According to the present invention, since the stand is detachably attached to the top wall of the cover, when the stand or the handle hinders the work, such as when working in a narrow place, the handle and the stand are removed from the cover. be able to. Thereby, the form of the cover can be changed according to the work content, and the workability of the disc grinder can be improved.

It is a perspective view of the disc grinder which is one embodiment of the present invention. It is sectional drawing which shows the structure of the dust collecting cover shown in FIG. It is sectional drawing which shows the shape of the stand shown in FIG. It is a modification of the dust collecting cover shown in FIG. 2, Comprising: It is sectional drawing which shows the case where a handle | steering-wheel is attached to the upper end of a stand so that angle adjustment is possible. It is a modification of the dust collecting cover shown in FIG. 2, Comprising: It is sectional drawing which shows the case where a handle | steering_wheel is provided in the upper end of a stand so that attachment or detachment is possible, and it can replace | exchange for several types of handles. It is a modification of the dust collecting cover shown in FIG. 2, Comprising: It is sectional drawing which shows the case where a stand is attached to the ceiling wall of a cover so that attachment or detachment is possible.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  The portable (hand-held) disc grinder 11 shown in FIGS. 1 to 3 is also called a disc sander, and is used for a surface grinding operation for grinding the surface of a work material 12 such as concrete or stone flatly.

  The disc grinder 11 includes a main body case 13 formed in a cylindrical shape, and an electric motor (not shown) is accommodated in the main body case 13. The electric motor is connected to a commercial power source (not shown) via a power cord 14 drawn from the rear end of the main body case 13, and is operated by electric power supplied from the commercial power source.

  A gear case 15 is attached to the distal end portion of the main body case 13. The gear case 15 includes a cylindrical boss portion 15 a orthogonal to the axial direction of the main body case 13, and the gear case 15 is rotatably supported by the boss portion 15 a and provided with a spindle 16. The spindle 16 is disposed coaxially with the boss portion 15 a, and a tip portion of the spindle 16 protrudes from the boss portion 15 a toward the outside of the gear case 15. A pair of bevel gears (not shown) are accommodated in the gear case 15, and the rotation of the electric motor is transmitted to the spindle 16 by changing the direction of 90 degrees by these bevel gears.

  As shown in FIG. 2, a diamond grinding wheel 17 as a disk-shaped (wheel-shaped) tip tool is attached to the tip of the spindle 16. The diamond wheel 17 includes a substrate 17a formed of a steel plate in a cup shape, and a plurality of diamond wheels 17b arranged in a plane are fixed to the surface of the substrate 17a by means such as adhesion. . The diamond grinding wheel 17 is attached to the tip of the spindle 16 at the center of the substrate 17a, and is fixed by being sandwiched between a washer 18 attached to the spindle 16 and a nut 19 screwed to the tip of the spindle 16. Has been.

  The gear case 15 is provided with a spindle lock button 21, and by pressing the spindle lock button 21, the spindle 16 can be brought into a locked state in which it does not rotate. When the nut 19 is screwed to the spindle 16 in order to fix the diamond wheel 17, the spindle 16 can be prevented from rotating together with the nut 19 by pressing the spindle lock button 21.

  When a power switch (not shown) provided in the main body case 13 is turned on, electric power is supplied to the electric motor, and the diamond grindstone wheel 17 together with the spindle 16 is driven by the electric motor to rotate. By uniformly pressing the entire surface of the rotated diamond grinding wheel 17 against the surface of the work material 12 and moving it back and forth and from side to side, a surface grinding operation for grinding the surface of the work material 12 flat can be performed.

  In this embodiment, the diamond grindstone wheel 17 is used as the disk-shaped tip tool. However, the present invention is not limited to this, and the work material is pressed by pressing the entire surface against the surface of the work material 12. Other tip tools such as a sanding disk may be used as long as the tool can grind the surface of 12 in a flat manner.

  The disc grinder 11 is provided with a dust collection cover 31 as a cover in order to prevent scattering of dust such as grinding powder generated by grinding operation.

  The dust collection cover 31 is also called a dust collection adapter, and includes a cover main body 32 formed of a resin material such as polycarbonate. The cover main body 32 is formed in a cylindrical shape having a larger diameter than the diamond grinding wheel 17 and a disk shape perpendicular to the axial direction of the spindle 16 and closes the axial end of the peripheral wall 32a. It is formed in a shape having a ceiling wall 32b. In other words, the cover main body 32 is formed in a cup shape (cylindrical shape with a bottom) in which only one end side that is the grinding surface side of the diamond grinding wheel 17 is opened.

  A mounting portion 33 that is fixed to the boss portion 15 a of the disc grinder 11 is provided on the top wall 32 b of the cover body 32. The mounting portion 33 is formed in a semi-cylindrical first adapter 33a having the same inner diameter as the outer diameter of the boss 15a, and a semi-cylindrical having the same inner diameter as the outer diameter of the boss 15a. A second adapter 33b combined with the first adapter 33a. The first adapter 33a is formed integrally with the top wall 32b of the cover body 32, and the second adapter 33b is formed of a resin material separately from the first adapter 33a. The inner peripheral surface of the first adapter 33a is brought into contact with the outer peripheral surface of the boss portion 15a, and the inner peripheral surface of the second adapter 33b is brought into contact with the outer peripheral surface of the boss portion 15a from the opposite side. By fastening the part with a fastening member 33c such as a bolt, the boss part 15a is sandwiched between the two adapters 33a and 33b, and the attachment part 33 is fixed to the boss part 15a. Then, the cover main body 32 is fixed to the disc grinder 11 by fixing the attachment portion 33 to the boss portion 15a.

  Here, the outer peripheral surface of the boss portion 15a and the inner peripheral surface of each of the adapters 33a and 33b are slightly smaller in outer diameter on the distal end side (side from which the spindle 16 protrudes) than on the proximal end. It is formed in a large taper shape. Accordingly, the cover main body 32 can be reliably fixed to the boss portion 15a so that the adapters 33a and 33b are not easily detached from the boss portion 15a.

  When the attachment portion 33 is fixed to the boss portion 15a, the dust collecting cover 31 is attached to the disc grinder 11 while being positioned by the boss portion 15a. When the dust collecting cover 31 is attached to the disc grinder 11, the entire circumference of the diamond grinding wheel 17 is covered by the peripheral wall 32 a of the cover body 32, and the back side opposite to the grinding surface of the diamond grinding wheel 17 is the cover body. 32 top walls 32b.

  A skirt (seal member) 34 is provided at the end of the peripheral wall 32a in order to close a gap generated between the peripheral wall 32a and the surface of the work material 12 when the diamond wheel 17 contacts the surface of the work material 12. Is provided. The skirt 34 is formed in a cylindrical shape having a slightly smaller diameter than the peripheral wall 32a. In the illustrated case, the skirt 34 is made of felt.

  The skirt 34 is not limited to the one made of felt, and other members such as a brush and a sponge may be used.

  A resin holding piece 35 is fixed to the upper end of the skirt 34, and the holding piece 35 engages with a holding groove 32c formed on the inner periphery of the peripheral wall 32a, so that the skirt 34 is axially connected to the peripheral wall 32a. It is designed to be held movably. In addition, a radially outwardly protruding partition piece 32d is provided on the inner peripheral surface of the peripheral wall 32a, and a spring member 36 such as a spring is disposed between the partition piece 32d and the holding piece 35. . The skirt 34 is urged by the spring member 36 in the axial direction toward the opening side of the peripheral wall 32a.

  When the surface of the diamond grinding wheel 17 is pressed against the surface of the work material 12 during the grinding operation, the tip of the skirt 34 comes into sliding contact with the surface of the work material 12. Thereby, the gap between the peripheral wall 32 a and the surface of the work material 12 is closed by the skirt 34. Further, even when the dust collecting cover 31 is inclined with respect to the surface of the work material 12 during the grinding operation, the spring member 36 is elastically deformed in accordance with this inclination, so that the skirt 34 is formed on the work material 12. Can follow the surface. Thereby, it is possible to prevent dust generated by the grinding operation from leaking to the outside of the cover main body 32 from between the peripheral wall 32a and the surface of the work material 12.

  A portion partitioned by the partition piece 32d and the top wall 32b inside the dust collecting cover 31 is a fan accommodating portion 32e, and a dust collecting fan 37, which is a centrifugal fan, is accommodated in the fan accommodating portion 32e. . The dust collecting fan 37 is fixed to the base portion of the spindle 16 and rotates together with the spindle 16. By rotating the dust collecting fan 37, dust inside the cover main body 32 is sucked and the dust collecting duct is collected. 38 to be sent. The dust collection duct 38 is provided integrally with the cover main body 32 and protrudes outward from the cover main body 32. A dust collecting hose 39 is connected to the tip of the dust collecting duct 38, and dust sent to the dust collecting duct 38 is collected through a dust collecting hose 39 to a dust collecting device (not shown). As described above, the dust collecting cover 31 is a self-collecting type in which dust is forcibly collected by the dust collecting fan 37 in the dust collecting device.

  The dust collection cover 31 is provided with a handle stand 41 in order to improve the workability of the disc grinder 11. The handle stand 41 has a stand 41a standing on the top wall 32b and a handle 41b provided on the upper end of the stand 41a.

  The stand 41a is made of resin integrally formed with the top wall 32b, and protrudes in parallel with the axial direction of the spindle 16 from the upper surface of the top wall 32b toward the side opposite to the opening of the cover body 32. As shown in FIG. 3, the stand 41a includes a cylindrical portion 41a1 formed in a semi-cylindrical shape coaxial with the spindle 16 and the boss portion 15a. By setting the stand 41a to include the semi-cylindrical cylindrical portion 41a1, the stand 41a can be configured in a small size and with high strength. Further, the base portion of the cylindrical portion 41a1 is formed integrally with the first adapter 33a of the mounting portion 33, and the strength of the stand 41a is also increased by this.

  When the dust collecting cover 31 is attached to the disc grinder 11, the cylindrical portion 41 a 1 of the stand 41 a is disposed so as to surround the tip portion of the gear case 15 of the disc grinder 11. In order to avoid interference with the distal end portion of the gear case 15, a concave portion 41 a 2 along the distal end portion is formed on the inner peripheral surface of the cylindrical portion 41 a 1. Thereby, the diameter of the cylindrical portion 41a1 can be reduced, and the stand 41a can be reduced in size.

  The cylindrical portion 41a1 is provided with a notch 41a3 adjacent to the spindle lock button 21 provided on the gear case 15. The cutout portion 41a3 is formed in a shape in which the side portion of the cylindrical portion 41a1 is cut out in the circumferential direction. By providing the notch 41a3, the spindle lock button 21 can be easily operated while avoiding the cylindrical portion 41a1 even when the dust collecting cover 31 is mounted.

  In the case shown in the figure, the notch 41a3 is formed in a shape in which the side portion of the cylindrical portion 41a1 is cut out in the circumferential direction. You may make it form.

  As shown in FIG. 2, the cylindrical portion 41a1 extends to a height exceeding the upper end of the gear case 15, and an upper end wall portion 41a4 perpendicular to the axial direction is provided at the tip, that is, the upper end of the cylindrical portion 41a1. . The upper end wall portion 41a4 is formed integrally with the cylindrical portion 41a1, and when the dust collecting cover 31 is attached to the disc grinder 11, the upper end wall portion 41a4 is an upper side opposite to the boss portion 15a of the gear case 15. The part is to be covered.

  The handle 41b is integrally provided on the upper end wall portion 41a4 that is the upper end of the stand 41a. The handle 41b has a flat portion formed so as to intersect the axis of the mounting portion 33. The flat part is formed in a thick disk shape with a slightly raised central part, and its area is about the size of a palm. The handle 41b is disposed coaxially with the cylindrical portion 41a1. When the attachment portion 33 is fixed to the boss portion 15a and the dust collecting cover 31 is attached to the disc grinder 11, the spindle 16 is located above the gear case 15. And are arranged coaxially. That is, the handle 41 b is disposed so that the axis of the handle 41 b coincides with the axis of the spindle 16 when the dust collecting cover 31 is attached to the disc grinder 11.

  When performing the surface grinding operation of the surface of the work material 12 using the disc grinder 11, the main body case 13 of the disc grinder 11 is grasped with one hand and the handle 41b is grasped with the other hand. be able to. At this time, since the handle 41b is arranged coaxially with the spindle 16 to which the diamond grinding wheel 17 is attached, by pushing the handle 41b downward by hand, a force is applied to the axis of the diamond grinding wheel 17. Can do. That is, by using this handle 41b, the work of uniformly pressing the entire surface of the diamond grinding wheel 17 against the surface of the work material 12 is facilitated. Therefore, by using this handle 41b, the surface grinding operation of the disc grinder 11 can be facilitated and the workability thereof can be improved.

  Thus, in the present invention, the dust collection cover 31 is provided with the handle stand 41, and when the dust collection cover 31 is attached to the disc grinder 11, the handle 41b is arranged coaxially with the spindle 16. By using the handle 41b, the work of pressing the entire surface of the diamond grindstone wheel 17 uniformly against the surface of the work material 12 can be facilitated, and the workability of the surface grinding work using the disc grinder 11 can be enhanced.

  Further, in the present invention, since the handle 41b has a flat portion formed so as to intersect with the axis of the mounting portion 33, a force can be applied uniformly to the handle 41b using a palm, so that surface grinding work It is possible to further improve the workability.

  Furthermore, since the handle stand 41 is formed in a substantially cylindrical shape having the axis of the mounting portion 33 on the inner peripheral side, it can be configured to be small and high in strength, and stable when a force is applied to the handle 41b. It is possible to improve the property and to suppress breakage and the like.

  Further, in the present invention, the handle 41b is provided at the upper end of the stand 41a erected on the cover main body 32, so that the handle 41b can be easily placed on the axis of the spindle 16 with the stand 41a having a simple shape such as a semi-cylindrical shape. And it can position correctly.

  Furthermore, in the present invention, since the handle 41b is provided at the upper end of the stand 41a provided in the cover body 32, if the boss portion 15a has the same outer diameter dimension, the shape of the gear case or the like is the same. Even if they are different, the handle 41b can be easily and reliably positioned on the axis of the spindle 16 by attaching the dust collecting cover 31.

  FIG. 4 is a cross-sectional view showing a modification of the dust collecting cover shown in FIG. 2 and a case where the handle is attached to the upper end of the stand so that the angle can be adjusted.

  In the case shown in FIG. 2, the handle 41b is integrally provided on the upper end wall portion 41a4 of the stand 41a. On the other hand, in the modification shown in FIG. 4, the handle 41b is formed separately from the stand 41a, that is, the upper end wall 41a4, and is attached to the upper end wall 41a4 so that the angle can be adjusted. A hinge 51 is provided on one end side of the handle 41b, and the handle 41b is rotatably supported by the upper end wall portion 41a4 by the hinge 51. The axial direction of the hinge 51 is directed in the width direction of the main body case 13, that is, the direction perpendicular to the axial direction of both the spindle 16 and the main body case 13, and the handle 41 b is moved in the vertical direction about the hinge 51. The angle can be adjusted.

  On the other hand, an arc-shaped leg 52 centered on the hinge 51 is integrally provided on the other side of the handle 41b, and the leg is supported by a screw member 53 such as a bolt inserted into an adjustment groove 52a provided in the leg 52. By fastening the part 52 to the upper end wall part 41a4, the angle of the handle 41b can be fixed.

  In this way, in the present invention, the handle 41b is attached to the stand 41a so that the angle can be adjusted, so that the angle of the handle 41b is set so that the operator can easily grip it, and the surface grinding work using the disc grinder 11 is performed. The sex can be further enhanced.

  FIG. 5 is a modification of the dust collecting cover shown in FIG. 2, and is a cross-sectional view showing a case where a handle is detachably provided at the upper end of the stand so that it can be replaced with a plurality of types of handles.

  In the case shown in FIG. 2, the handle 41b is integrally provided on the upper end wall portion 41a4 of the stand 41a. On the other hand, in the modification shown in FIG. 5, the handle 41b is formed separately from the stand 41a, and is fixed to the upper end wall portion 41a4 by a screw member 54 such as a bolt. Thereby, the handle 41b is configured to be detachable from the stand 41a. By providing a plurality of types of handles 41b having different shapes and materials, the handle 41b selected by the operator according to his / her preference can be attached to the stand 41a. That is, it is possible to easily replace only the handle 41b with the stand 41a as it is according to the preference of the operator.

  In this case, a circular positioning boss 55 is provided on the surface of the upper end wall portion 41a4 coaxially with the cylindrical portion 41a1, and a circular positioning recess 56 corresponding to the positioning boss 55 is provided on the shaft center of the bottom surface of the handle 41b. It has been. By engaging the positioning recess 56 of the handle 41 b with the positioning boss 55, the handle 41 b can be accurately positioned on the axis of the spindle 16.

  The screw member 54 is inserted into a through hole 57 provided in the shaft center of the handle 41b, and is screwed to a screw hole 58 provided in the shaft center of the positioning boss 55 of the upper end wall portion 41a4.

  Thus, in the present invention, the handle 41b is detachably attached to the stand 41a and can be exchanged for a plurality of types of handles 41b having different shapes. Therefore, the handle 41b has a shape that is easy to grip according to the preference of the operator. It is possible to replace it with another, and the workability of the surface grinding work using the disc grinder 11 can be further enhanced.

  FIG. 6 is a modification of the dust collecting cover shown in FIG. 2 and is a cross-sectional view showing a case where a stand is detachably attached to the top wall of the cover.

  In the case shown in FIG. 2, the stand 41 a is provided integrally with the top wall 32 b of the cover main body 32. On the other hand, in the modification shown in FIG. 6, the stand 41 a is formed separately from the top wall 32 b and can be attached to and detached from the top wall 32 b with the screw member 61.

  As described above, in the present invention, the stand 41a can be detachably attached to the top wall 32b of the cover main body 32 using the screw member 61. Therefore, when working in a place with a low height or a narrow place, etc. When the handle stand 41 hinders work, the handle stand 41 can be removed from the dust cover 31 to perform work. Thereby, the form of the dust collecting cover 31 can be changed according to the work content, and the workability of the disc grinder 11 can be improved.

  A flange 62 projecting radially outward is integrally provided at a root portion of the cylindrical portion 41a1 of the stand 41a, and the stand 41a is fixed to the top wall 32b by a screw member 61 inserted through the flange 62. A stepped portion 63 having an enlarged inner diameter is formed on the inner peripheral surface of the base portion of the cylindrical portion 41a1, and by bringing the inner peripheral surface of the stepped portion 63 into contact with the outer peripheral portion of the first adapter 33a, The handle stand 41 can be accurately positioned on the top wall 32b. As a result, the handle 41b can be accurately positioned coaxially with the spindle 16.

  4 to 6, the members corresponding to the members described above are denoted by the same reference numerals.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the disk grinder 11 of the present invention is exemplified by an electric motor as a drive source. However, the present invention is not limited to this, and a disk grinder provided with another drive source such as an air motor, for example. You may make it apply this invention to.

  In the above embodiment, the handle 41b is arranged coaxially with the spindle 16. However, the present invention is not limited to this, and the handle 41b is arranged so that a part of the handle 41b overlaps the axis of the spindle 16. Just do it.

  Furthermore, in the said embodiment, although the case where this invention is applied to the self-dust collection type dust collection cover 31 provided with the dust collection fan 37 and the dust collection duct 38 is shown, not only this but, for example, The present invention may be applied to other covers such as a protective cover that does not have a dust collecting function.

  Furthermore, in the above-described embodiment, the attachment portion 33 is provided integrally with the top wall 32b of the cover body 32, and the skirt 34 that follows the work material 12 is provided on the peripheral wall 32a. The top wall 32b is separated into a portion where the mounting portion 33 is provided and a portion connected to the peripheral wall 32a, and the separated portion is connected by an elastic body such as a spring, whereby the cover main body 32 is attached to the surface of the work material 12. It is good also as a structure made to track. In this case, the handle stand 41 is provided at a portion on the side where the attachment portion 33 of the top wall 32b is provided.

  Further, in the above-described embodiment, the stand 41a is formed in a semi-cylindrical shape coaxial with the spindle 16 and the boss portion 15a. However, the axis may be shifted, and it is configured in a rod shape instead of a cylinder. May be.

  Furthermore, in the said embodiment, although the handle | steering-wheel 41b was set as the structure formed in disk shape, it is not restricted to disk shape. Further, such a substantially rod-like handle may extend in a direction substantially perpendicular to the axis of the spindle 16.

DESCRIPTION OF SYMBOLS 11 Disc grinder 12 Work material 13 Main body case 14 Power cord 15 Gear case 15a Boss part 16 Spindle 17 Diamond grindstone wheel (tip tool)
17a Substrate 17b Diamond grinding wheel 18 Washer 19 Nut 21 Spindle lock button 31 Dust collecting cover 32 Cover body 32a Peripheral wall 32b Top wall 32c Holding groove 32d Partition piece 32e Fan housing portion 33 Mounting portion 33a First adapter 33b Second adapter 33c Fastening member 34 Skirt 35 Holding piece 36 Spring member 37 Dust collection fan 38 Dust collection duct 39 Dust collection hose 41 Handle stand 41a Stand 41a1 Cylindrical portion 41a2 Recessed portion 41a3 Notch portion 41a4 Upper end wall portion 41b Handle 51 Hinge 52 Leg portion 52a Adjustment groove 53 Screw member 54 Screw member 55 Positioning boss 56 Positioning recess 57 Through hole 58 Screw hole 61 Screw member 62 Flange 63 Stepped portion

Claims (12)

A portable disc grinder in which a disc-shaped tip tool can be attached to a spindle,
A cover body formed in a cup shape with one end opened, comprising a peripheral wall covering the entire circumference of the tip tool and a top wall covering the back side;
An attachment portion provided on the top wall and fixed to a boss portion of the disc grinder from which the spindle protrudes;
A stand provided on the top wall so as to protrude from the top wall toward the opposite side of the opening;
A disc grinder comprising a handle provided on an upper end of the stand and disposed on an axis of the spindle when the attachment portion is fixed to the boss portion.   2. The disc grinder according to claim 1, wherein the handle has a flat portion extending in a direction substantially orthogonal to the axis of the mounting portion.   3. The disc grinder according to claim 1, wherein the stand is formed in a substantially cylindrical shape having an axis of the attachment portion on an inner peripheral side.   The disc grinder according to any one of claims 1 to 3, wherein the handle is attached to the stand so as to be adjustable in angle.   The disc grinder according to any one of claims 1 to 3, wherein the handle is detachably provided on the stand and can be exchanged for a plurality of types of the handles having different shapes.   The disc grinder according to any one of claims 1 to 5, wherein the stand is detachably attached to the top wall. A cover that is attached to a portable disc grinder capable of mounting a disc-shaped tip tool on a spindle and covers the tip tool,
A cover body that is provided with a peripheral wall and a ceiling wall, and is formed in a cup shape with one end opened;
An attachment portion provided on the top wall and fixed to a boss portion of the disc grinder from which the spindle protrudes;
A stand provided on the top wall so as to protrude from the top wall toward the opposite side of the opening;
A cover provided on an upper end of the stand, and having a handle disposed on an axis of the spindle when the attachment portion is fixed to the boss portion.   The cover according to claim 7, wherein the handle has a flat portion extending in a direction substantially orthogonal to the axis of the attachment portion.   The cover according to claim 7 or 8, wherein the stand is formed in a substantially cylindrical shape having an axis of the mounting portion on an inner peripheral side.   The cover according to any one of claims 7 to 9, wherein the handle is attached to the stand so as to be adjustable in angle.   The cover according to any one of claims 7 to 10, wherein the handle is detachably provided on the stand and can be replaced with a plurality of types of the handles having different shapes.   The cover according to any one of claims 7 to 11, wherein the stand is detachably attached to the top wall.

Images