JP2019198918A - Grinding attachment - Google Patents

Abstract

To provide a grinding attachment that enables a worker to safely execute grinding work without getting into a narrow space.SOLUTION: A grinding attachment 1 includes: a disc grinder 2; a holding part 3 for holding the disc grinder 2; an operation part 4 that is attached to the holding part 3; and a wheel 42 that is attached to the holding part 3. Thus, grinding work can be executed by moving the grinding attachment 1 to an undersurface 71 of a steel frame S that is an object to be ground. In addition, the holding part 3 comprises a distance adjustment mechanism for adjusting a distance between the disc grinder 2 and the wheel 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grinding apparatus for grinding rust, coating film, and the like of a steel frame under the floor.

  Conventionally, a hand-held disc grinder as described in Patent Document 1 has been used as a grinding tool for grinding rust such as steel frames. This disc grinder grinds dirt such as rust by bringing a grindstone gripped and rotated by a worker performing a grinding operation into contact with a steel frame or the like to be ground.

JP 2002-144244 A

  However, since the disc grinder described in Patent Document 1 is a hand-held type, for example, when grinding a steel frame or the like disposed under the floor, the gap between the ground and the steel frame is narrow, and the operator can In some cases, grinding work could not be performed. Even when the operator can enter the gap, the worker needs to perform the grinding work in a supine state, and the work is physically difficult, and thus grinding unevenness may occur. It was. If the work is performed carefully so as not to cause grinding unevenness, it takes time and there is a problem that the work efficiency is very poor. Furthermore, since the disc grinder is operated with an unreasonable posture, there is a risk that the operator's body contacts the rotating grindstone. Moreover, there also existed a problem that the grind | pulverized piece of rust etc. fell on an operator's body.

  Therefore, an object of the present invention is to provide a grinding apparatus that allows an operator to work safely without entering a narrow space.

  The grinding apparatus according to claim 1 includes a grinding machine, a holding unit that holds the grinding machine, an operation unit that is attached to the holding unit, and a wheel that is attached to the holding unit. .

  The grinding apparatus according to claim 2 is characterized in that the holding portion includes a distance adjusting mechanism capable of adjusting a distance between the grinding machine and the wheel.

  The grinding apparatus according to claim 3 is characterized in that the grinding machine has a grinding part for grinding a non-ground body, and the grinding machine can be attached with the grinding part facing upward.

  The grinding apparatus according to claim 4 is characterized in that the grinding machine has a grinding part for grinding a non-ground body, and the grinding machine can be attached in a state where the grinding part faces sideways.

  The grinding apparatus according to a fifth aspect is characterized in that the holding portion includes an angle adjustment mechanism capable of adjusting an attachment angle of the grinding machine.

  The grinding apparatus according to claim 6 is characterized in that the grinding part is disposed in front of the wheel and the operation part is disposed in the rear of the wheel.

  The grinding device according to a seventh aspect is characterized in that the operation unit includes an operation base fixed to the holding unit and a length adjustment operation unit detachably coupled to the operation base.

  According to the present invention, an operator can safely perform a grinding operation without entering a narrow space.

It is a right view of the grinding device of Example 1 of the present invention. It is a right view which shows the principal part of a grinding apparatus same as the above. It is a top view which shows the principal part of a grinding apparatus same as the above. It is a front view which shows the principal part of a grinding apparatus same as the above. It is a left view of a base part same as the above. It is a top view of a left support part and a right support part same as the above. It is a front view of a left support part and a right support part as above. It is a right view of the grinding device of Example 2 of the present invention. It is a right view which shows the principal part of a grinding apparatus same as the above. It is the figure which looked at the base part from the upper side same as the above. It is a right view of a base part same as the above. It is the figure which looked at the disk grinder of the state fixed to the support part from the bottom same as the above. FIG. 3 is a right side view of the disc grinder in a state of being fixed to the support unit. It is the figure seen from the right side when the grinding part of the disc grinder fixed to the support part is turned to the left side. It is a rear view of the disc grinder of the state fixed to the support part same as the above. It is a front view of the disc grinder of the state fixed to the support part same as the above. FIG. 3 is a rear view of the grinding device when the grinding part of the disc grinder is directed to the right side. FIG. 2 is a rear view of the grinding device when the grinding part of the disc grinder is directed to the left side.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In the embodiment, the description will be made assuming that the right, left, back and front in FIGS. 1 and 8 are the front, back, left and right of the grinding apparatus.

  1 to 7 show a first embodiment of the present invention. As shown in FIG. 1, a grinding apparatus 1 includes a disc grinder 2 as a grinding machine, a holding unit 3 that holds the disc grinder 2, and a grinding operation. An operation unit 4 held by a worker (not shown) to perform and a wheel unit 5 that enables the grinding device 1 to move on the ground G or the like are provided. The present embodiment is a grinding apparatus 1 in which the disc grinder 2 is attached in a state where the grinding portion 6 of the disc grinder 2 faces upward.

  The disc grinder 2 has a main body portion 7 and a grinding portion 6 made of an annular grindstone. When the disc grinder 2 is used alone, the operator grips and uses the main body 7. The grinding part 6 rotates at a high speed (for example, 10,000 revolutions / minute), and grinds the non-ground material brought into contact with the grinding part 6. The disc grinder 2 can be turned on / off by a power button (not shown) provided on the main body 7. The disc grinder 2 of this embodiment is a power source for supplying power to the disc grinder 2. A switch box 9 is provided in the cord 8, and a power button 10 is also provided in the switch box 9. The power button 10 can also be turned on / off. Although not shown, a speed controller for controlling the rotational speed of the grinding unit 6 of the disc grinder 2 is separately provided, and the operator can change the rotational speed of the grinding unit 6 at hand.

  As shown in FIGS. 2 to 7, the holding unit 3 of the grinding apparatus 1 includes a base unit 11, a left support unit 12 </ b> A and a right support unit 12 </ b> B as support units that support the disc grinder 2. The base 11 includes a rectangular bottom plate portion 13, a left side plate portion 14 </ b> A erected from the left end portion of the bottom plate portion 13, and a right side plate portion 14 </ b> B erected from the right end portion of the bottom plate portion 13. The left side plate portion 14A, the right side plate portion 14B, and the bottom plate portion 13 are substantially perpendicular.

  As shown mainly in FIG. 3, two long holes 15 that are long in the left-right direction are formed in the front portion of the base portion 11. Further, two pairs of left and right front screw holes 16 are formed on the rear side of the long hole 15 in the front-rear direction. Further, a pair of left and right rear screw holes 17 and a pair of left and right bolt holes 18 are formed in the rear portion of the bottom plate portion 13 alternately in the front-rear direction. Five pairs of the rear screw hole 17 and the bolt hole 18 are formed. Five pairs of left and right outer long holes 19 are formed on the outer sides in the left-right direction of the rear screw hole 17 and the bolt hole 1.

  As shown in FIG. 5, the left side plate portion 14 </ b> A and the right side plate portion 14 </ b> B have the same shape, a substantially rectangular lower plate portion 20 that is long in the front-rear direction, and an upper portion of the lower plate portion 20 in the front-rear direction center portion. The provided substantially rectangular upper plate portion 21 is integrally formed, and is formed in a substantially convex shape as a whole. An insertion hole 22 is formed in the front portion of the upper plate portion 21, and a nut 24 is fixed to the inner side surface 23 of the upper plate portion 21 at the peripheral portion of the insertion hole 22 by welding. Further, two side plate screw holes 25 arranged in the vertical direction are formed in the rear portion of the upper plate portion 21.

  As shown in FIGS. 6 and 7, the left support portion 12 </ b> A and the right support portion 12 </ b> B have the same shape, and a substantially rectangular horizontal plate portion 26 and a vertical plate portion 27 erected from one side of the horizontal plate portion 26. It is composed of The horizontal plate portion 26 and the vertical plate portion 27 are substantially perpendicular. A laterally long hole 28 that is long in the longitudinal direction of the lateral plate part 26 is formed in the lateral plate part 26. A longitudinally long hole 29 that is long in the longitudinal direction (vertical direction) of the longitudinal plate portion 27 is formed in the longitudinal plate portion 27. It should be noted that by preparing a plurality of vertical plate portions 27 having different lengths in the longitudinal direction (vertical direction), the vertical plate portion 27 is suitable for the distance between the ground G on which the grinding apparatus 1 is placed and the object to be ground. You can select and use one.

  As shown mainly in FIGS. 3 and 4, the left support portion 12 </ b> A is fixed to a bottom plate upper surface 32 that is an upper surface of the bottom plate portion 13 of the base portion 11 by a bolt 30 and a nut 31. The bolt 30 is inserted from the upper side into a laterally long hole 28 perforated in the lateral plate part 26 and a long hole 15 perforated in the bottom plate part 13, and is screwed to the nut 31 at the bottom plate lower surface 33 which is the lower surface of the bottom plate part 13. The Since the bolt 30 is inserted through the horizontally long hole 28 and the long hole 15, the fixing position of the left support portion 12 </ b> A can be adjusted within the range of the length of the horizontally long hole 28 and the long hole 15.

  The right support part 12B is also fixed to the bottom plate upper surface 32 of the base part 11 by bolts 30 and nuts 31 in the same manner as the left support part 12A. The bolt 30 is inserted from above into a horizontally long hole 28 formed in the horizontal plate portion 26 and a long hole 15B formed in the bottom plate portion 13, and is screwed onto the nut 31 on the bottom plate lower surface 33. Since the bolt 30 is inserted through the horizontally long hole 28 and the long hole 15, the fixing position of the right support portion 12 </ b> B can be adjusted within the range of the length of the horizontally long hole 28 and the long hole 15.

  Here, a method of attaching and fixing the disc grinder 2 to the holding unit 3 will be described. A main body bolt hole 35 into which a hexagon bolt 34 can be screwed is formed in the main body 7 of the disc grinder 2 on the left and right. Hexagonal bolts 34 are inserted into the longitudinally long holes 29 of the left support portion 12A and the right support portion 12B from the outside in the left-right direction and screwed into the main body bolt holes 35 so that the front side of the disc grinder 2 is connected to the left support portion 12A and the right support portion. It can be fixed to 12B. The position in the height direction for fixing the disc grinder 2 to the left support part 12 </ b> A and the right support part 12 </ b> B can be adjusted by the position of the hexagon bolt 34 inserted through the vertically long hole 29. That is, the height can be adjusted within the range of the length of the vertically long hole 29.

  The rear side of the disc grinder 2 is fixed to the bottom plate portion 13 of the base portion 11 with a U bolt 36. The U-bolt 36 is externally fitted to the main body portion 7 of the disc grinder 2, is inserted through the outer long hole 19, and is screwed into the nut 37 on the bottom plate lower surface 33 of the bottom plate portion 13.

  The position in the height direction at which the disc grinder 2 is fixed to the bottom plate portion 13 can be adjusted by using a rectangular plate-like spacer 38, and the height is adjusted by the number of spacers 38 stacked. The spacer 38 is inserted into the rear screw hole 17 from the bottom plate lower surface 33 side, and is disposed and held between four support bolts 40 screwed into the nut 39 on the bottom plate upper surface 32 of the bottom plate portion 13. The main body portion 7 of the disc grinder 2 is brought into contact with the upper surface 41 of the uppermost spacer 38 that is overlapped. As shown in FIG. 2, in this embodiment, three spacers 38 are used.

  Further, the abutting bolt 61 is screwed into the front screw hole 16 from the bottom plate lower surface 33 side of the bottom plate portion 13, and the abutting bolt 61 is brought into contact with the main body portion 7 of the disc grinder 2 to support the disc grinder 2.

  In this way, the disc grinder 2 is held and fixed to the holding portion 3 at three positions in the front and rear. In this embodiment, the front side of the disc grinder 2 is fixed to be higher than the rear side. Therefore, the grinding part 6 of the disc grinder 2 can be brought into contact with the workpiece to be inclined. In the present embodiment, the left support portion 12A, the right support portion 12B, the hexagon bolt 34, the spacer 38, and the butting bolt 61 are angle adjusting mechanisms.

  As shown mainly in FIGS. 2 and 4, a wheel unit 5 is attached to the holding portion 3. The wheel unit 5 includes wheels 42 arranged one by one on the left and right sides, a wheel unit base 43 to which the wheels 42 are attached, and a wheel unit fixing part 44 that fixes the wheel unit base 43 to the holding unit 3.

  The wheel unit base portion 43 is formed of a plate-like member, and a wheel attachment portion 45 for attaching the wheels 42 formed on the left and right sides, a concave connection portion 46 formed in a substantially concave shape between the left and right wheel attachment portions 45, It is a front end portion of the wheel unit base 43 and is composed of a plate-like blindfold plate portion 47 connected to the wheel attachment portion 45 and the concave connection portion 46. The wheel 42 is fixed to the wheel mounting portion 45 by four bolts 48.

  The wheel unit fixing portion 44 includes a suspension 51 including a suspension shaft portion 49 and a spring 50, and a mounting plate portion 52 for attaching the suspension 51 to the left side plate portion 14A and the right side plate portion 14B of the holding portion 3. The suspension shaft portion 49 is erected on the upper surface 53 of the wheel mounting portion 45 while being inserted through the spring 50. At the upper part of the suspension shaft portion 49, a retaining portion 54 for preventing the spring 50 from coming off from the suspension shaft portion 49 is provided. A mounting plate portion 52 is fixed to the retaining portion 54. The attachment plate portion 52 is formed in a substantially rectangular plate shape, and a lever long hole 55 that is a long hole that is long in the vertical direction is formed in the front side portion.

  The attachment plate portion 52 is attached to the left plate portion 14A and the right plate portion 14B by a clamp lever 56, respectively. Therefore, by tightening the clamp lever 56, the mounting plate portion 52 is fixed to the left side plate portion 14A and the right side plate portion 14B, and by loosening the clamp lever 56, the mounting plate portion 52 can be moved. A lever screw portion 57, which is a screw portion of the clamp lever 56, is inserted into the lever long hole 55 of the mounting plate portion 52, the left side plate portion 14 </ b> A, and the insertion hole 22 of the right side plate portion 14 </ b> B and screwed into the nut 24. Therefore, when the clamp lever 56 is loosened, the holding portion 3 can move in the vertical direction within the range of the length of the lever slot 55. Thereby, the distance D1 between the grinding part 6 of the disc grinder 2 and the wheel 42 can be adjusted. In order to adjust the distance D1, the clamp lever 56 is loosened, the holding portion 3 is moved in the vertical direction, the clamp lever 56 is tightened at a desired position, and the holding portion 3 is fixed. In the present embodiment, the mounting plate portion 52 and the clamp lever 56 are distance adjusting mechanisms.

  A restricting portion 58 formed in a substantially rectangular plate shape for restricting the rearward movement of the attachment plate portion 52 is attached to the rear portions of the left side plate portion 14A and the right side plate portion 14B. The restriction portion 58 has two upper and lower bolt holes 59, and the bolt 60 is inserted into the bolt hole 59 and screwed into the side plate screw holes 25 of the left side plate portion 14A and the right side plate portion 14B. The restricting portion 58 is fixed to the left side plate portion 14A and the right side plate portion 14B.

  As shown mainly in FIGS. 1 and 2, the operation unit 4 includes an operation base 62 attached to the bottom plate lower surface 33 of the holding unit 3, an extension operation unit 63 detachable from the operation base 62, and an operation base 62. It is comprised from the operation end part 64 which can be attached or detached to the extension operation part 63. FIG. The operation base 62, the extended operation part 63, and the operation end part 64 are formed in a substantially cylindrical shape. The operation base portion 62 is fixed to the bottom plate portion 13 of the holding portion 3 at two locations by U bolts 65. The U-bolt 65 externally fitted to the operation base 62 is inserted into the bolt hole 18 from the bottom plate lower surface 33 side of the bottom plate portion 13 and is screwed to the nut 66 on the bottom plate upper surface 32 side of the bottom plate portion 13. In this embodiment, the extension operation part 63 and the operation end part 64 are length adjustment operation parts.

  A plug 67 constituting a connecting portion is provided at the rear end portion of the operation base portion 62. A socket 68 constituting a connecting portion is provided at one end of the extension operation portion 63, and a plug 69 constituting a connecting portion is provided at the other end. By connecting the plug 67 of the operation base 62 and the socket 68 of the extension operation portion 63, the extension operation portion 63 can be connected to the operation base 62. A plurality of extension operation units 63 may be used. A socket 70 constituting a connection portion is provided at one end portion of the operation end portion 64. By connecting the socket 70 of the operation end portion 64 to the plug 67 of the operation base portion 62 or the plug 69 of the extension operation portion 63, the operation end portion 64 can be connected to the operation base portion 62 or the extension operation portion 63. The connecting portion of this embodiment is a so-called quick joint, but other known connecting tools can be used as long as they can removably connect the operation base 62, the extended operation portion 63, and the operation end portion 64 to each other. Good. Moreover, the length of the operation base 62, the extended operation part 63, and the operation end part 64 can each be made into desired length. In addition, as long as the operator can grip, various shapes can be selected as the shapes of the operation base portion 62, the extended operation portion 63, and the operation end portion 64.

  Here, a method of grinding the steel frame S as an object to be ground provided under the floor of the building using the grinding apparatus 1 will be described. The height of the grinding part 6 of the disc grinder 2 is adjusted in advance according to the distance between the steel frame S and the ground G. Then, the grinding part 6 of the disc grinder 2 is brought into contact with the lower surface 71 of the steel frame S as shown in FIGS. When the power button 10 of the switch box 9 is operated to turn on the power of the disc grinder 2, the grinding unit 6 starts to rotate and the lower surface 71 of the steel frame S can be ground. The operator rolls the wheel 42 by pushing and pulling the operation unit 4 in the front-rear direction, and grinds dirt such as rust and coating film attached to the lower surface 71 of the steel frame S along the longitudinal direction of the steel frame S. Can do. Rust and coating film that have been ground and dropped onto the ground G may be collected after the grinding operation.

  Even if the ground G has irregularities or distortions and the wheel 42 moves up and down or tilts when the grinding apparatus 1 moves, the suspension 51 absorbs a certain amount of vertical movement and tilt of the wheel 42, and the grinding unit The contact between 6 and the steel frame S can be maintained. Further, since the suspension 51 is provided, the grinding portion 6 of the disc grinder 2 is pressed against the object to be ground with an appropriate strength. Therefore, the overload on the disc grinder 2 due to the grinding unit 6 being strongly pressed against the workpiece can be reduced.

  In the present embodiment, since the grinding unit 6 is disposed in front of the wheel 42 and the operation unit 4 is disposed behind the wheel 42, the wheel 42 is supported by moving the operation unit 4 in the vertical direction. The height of the grinding part 6 can be changed. That is, when the operation unit 4 is lifted upward, the grinding unit 6 is lowered, and when the operation unit 4 is lowered downward, the grinding unit 6 is raised.

  As described above, the grinding apparatus 1 according to the present embodiment includes the disc grinder 2, the holding unit 3 that holds the disc grinder 2, the operation unit 4 that is attached to the holding unit 3, and the wheels 42 that are attached to the holding unit 3. , The wheel 42 is rolled to move the grinding device 1 below the workpiece, and the disc grinder 2 can grind the workpiece. For this reason, the operator does not have to go under the workpiece.

  Further, in the grinding device 1 of this embodiment, the holding portion 3 includes the mounting plate portion 52 and the clamp lever 56 that can adjust the distance D1 between the disc grinder 2 and the wheel 42, so that the grinding portion 6 of the disc grinder 2 can be adjusted. The position can be adjusted to the height of the workpiece. Therefore, even a plurality of objects to be ground having different heights can be ground according to the height of each object to be ground.

  Further, the grinding apparatus 1 of the present embodiment has a grinding unit 6 for grinding the non-ground body by the disc grinder 2, and the disc grinder 2 can be attached with the grinding unit 6 facing upward. The lower surface 71 of the ground object can be easily ground.

  In the grinding apparatus 1 of the present embodiment, the holding unit 3 includes the left support unit 12A, the right support unit 12B, the hexagon bolt 34, the spacer 38, and the abutting bolt 61 that can adjust the mounting angle of the disc grinder 2. The grinding part 6 can be brought into contact with the object to be ground at a desired angle for grinding.

  Further, the grinding apparatus 1 of the present embodiment is ground by raising and lowering the operation unit 4 because the grinding unit 6 is disposed in front of the wheel 42 and the operation unit 4 is disposed behind the wheel 42. The position of the part 6 in the vertical direction (height direction) can be adjusted. Therefore, without changing the height of the grinding part 6 by the mounting plate part 52 and the clamp lever 56, the grinding operation can be performed while appropriately changing the position of the grinding part 6 by the operation of the operation part 4 by the operator.

  In the grinding apparatus 1 of the present embodiment, the operation unit 4 includes an operation base 62 fixed to the holding unit 3, an extended operation unit 63 detachably connected to the operation base 62, and an operation end 64. Thereby, the length of the operation part 4 can be made into a desired length, and a grinding operation can be facilitated.

  FIGS. 8-18 shows Example 2 of this invention, and attaches | subjects the same code | symbol to the same part as the said Example 1, and abbreviate | omits the detailed description. The present embodiment is a grinding device 81 to which the disc grinder 2 is attached in a state where the grinding unit 6 faces the right side. Since the disc grinder 2 and the operation unit 4 of the present embodiment are the same as those of the first embodiment, description thereof is omitted.

  As shown in FIG. 8, the grinding device 81 includes a holding unit 82 that holds the disc grinder 2, an operation unit 4 that is held by an operator (not shown) that performs the grinding operation, and the grinding device 1 on the ground G or the like. A wheel unit 83 that is movable is provided.

  As shown in FIGS. 9 to 18, the holding portion 82 includes a base portion 84 and a support portion 85 that supports the disc grinder 2. The base portion 84 is a rectangular plate-like bottom plate portion 86 that is long in the front-rear direction, a front plate portion 87, a rear plate portion 88, a left plate portion 89, and a right plate portion 90 that are erected from four sides of the bottom plate portion 86, It has a front support portion 92 provided at the center portion in the left-right direction of the inner side surface 91 of the front plate portion 87 and a rear support portion 94 provided at the center portion in the left-right direction of the inner side surface 93 of the rear plate portion.

  As shown in FIGS. 10 and 11, two pairs of left and right insertion holes 95 are formed in the bottom plate portion 86 in the front-rear direction. Further, the front support portion 92 and the rear support portion 94 are connected to the bottom plate portion 86.

  The left plate portion 89 and the right plate portion 90 have the same shape, and two hook insertion holes 96 are formed in the front and rear. A lever insertion hole 97 and two screw holes 98 are formed between the front and rear hook insertion holes 96. A nut 100 is fixed by welding to the inner side surface 99 of the left plate portion 89 and the peripheral edge portion of the hook insertion hole 96.

  The front support portion 92 is formed in a plate shape, and the upper side extends to the front side from the front plate portion 87. At the upper end portion of the front support portion 92, a front side lock receiving portion 101 that is locked to the support portion 85 is formed. The front side latch receiving part 101 has a shape that is cut out at a substantially right angle, and the lower side receiving part 102 that supports the support part 85 from the lower side and the support part 85 moves to the rear side. It comprises a front receiving portion 103 that regulates.

  The rear support portion 94 is formed in a plate shape, and the length in the vertical direction is shorter than that of the front support portion 92. A rear side latch receiving portion 104 that is engaged with the support portion 85 is formed at the upper end portion of the rear side support portion 94. The rear side latch receiving portion 104 has a shape that is cut out at a substantially right angle, and the lower side receiving portion 105 that supports the support portion 85 from the lower side and the support portion 85 moves to the front side. The rear receiving part 106 to be regulated is configured.

  As shown mainly in FIGS. 12 to 14, the support portion 85 is formed in a plate shape, and a rear side plate portion 107 facing the back side of the disc grinder 2, and a front side member erected from the front side of the rear side plate portion 107. It has a stop 108, a rear locking portion 109 erected from the rear side of the back side plate portion 107, and a pressing plate portion 110 that holds the disc grinder 2 on the front side.

  The back plate 107 has seven pairs of upper and lower long holes 111 formed therein. Between the upper and lower elongated holes 111, seven pairs of upper and lower screw holes 112 are formed. In addition, on the rear side of the long hole 111 and the screw hole 112, a long hole 113 that is long in the longitudinal direction (front-rear direction) of the back side plate portion 107 is formed vertically.

  As shown in FIG. 15, the front locking portion 108 is formed in a substantially rectangular plate shape, a rectangular groove 115A is formed on the upper side 114A, and a rectangular groove is formed on the lower side 114B. 115B is formed. The groove widths of the recessed groove portions 115 </ b> A and 115 </ b> B are formed slightly larger than the plate thickness of the front support portion 92. Further, the concave groove 115A is inclined in the direction away from the virtual line L1 with respect to the virtual line L1 parallel to the back side plate part 107, and the concave groove part 115B is relative to the virtual line L1 parallel to the back side plate part 107. The lower side is inclined in a direction away from the imaginary line L1. In this embodiment, the inclination angle θ of the concave grooves 115A and 115B is 3 °, but the inclination angle θ can be changed as appropriate.

  As shown in FIG. 16, the rear locking portion 109 is formed in a substantially rectangular plate shape, a rectangular concave groove portion 117A is formed in the upper side portion 116A, and a rectangular concave portion is formed in the lower side portion 116B. A groove 117B is formed. The groove widths of the concave groove portions 117 </ b> A and 117 </ b> B are slightly larger than the plate thickness of the rear support portion 94. A cable groove 119 through which the extension cable 8 is inserted is formed on the right side 118 of the rear locking portion 109. In addition, the concave groove portion 117A is inclined in the direction away from the virtual line L2 with respect to the virtual line L2 parallel to the back side plate portion 107, and the concave groove portion 117B is relative to the virtual line L2 parallel to the back side plate portion 107. The lower side is inclined in a direction away from the imaginary line L2. In the present embodiment, the inclination angle θ of the concave grooves 117A and 117B is 3 °, but the inclination angle θ can be changed as appropriate.

  As shown in FIGS. 12 to 14, as shown in FIG. 14, the presser plate portion 110 includes a substantially rectangular plate-shaped first plate portion 120 that abuts on the back side plate portion 107 of the support portion 85, and a main body portion of the disc grinder 2. 7 is composed of a second plate portion 121 having a substantially rectangular plate shape that abuts against the second plate portion 121. The second plate portion 121 is substantially perpendicular to the first plate portion 120. Two screw holes 122 are formed in the first plate portion 120.

  Here, a method for attaching and fixing the disc grinder 2 to the holding portion 82 will be described. First, the disc grinder 2 is placed on the back side plate portion 107 of the support portion 85, and the front side of the main body portion 7 is brought into contact with the front side locking portion 108. Next, the second plate portion 121 of the holding plate portion 110 is brought into contact with the rear side of the main body portion 7, and the butterfly bolt 123 is inserted into the long hole 113 from the outer surface 124 side of the back side plate portion 107, so that the holding plate portion 110 Screwed into the screw hole 122. Thereby, the disc grinder 2 is held so as not to move in the front-rear direction. Since the butterfly bolt 123 is inserted into the long hole 113, the position of the holding plate 110 in the front-rear direction can be easily adjusted within the range of the long hole 113. Next, two U bolts 36 are externally fitted to the main body 7 of the disc grinder 2, and the U bolt 36 is inserted into the long hole 111 and screwed into the nut 37 on the outer surface 124 side. Finally, the abutting bolt 125 is screwed into the screw hole 112 from the outer surface 124 side of the back side plate portion 107, and the abutting bolt 125 is brought into contact with the main body portion 7 of the disc grinder 2 to support the disc grinder 2.

  Next, the attachment method to the base part 84 of the support part 85 is demonstrated. The concave groove portion 115B of the front side locking portion 108 of the support portion 85 is engaged with the front side locking receiving portion 101 of the base portion 84, and the rear side locking portion 109 and the concave groove portion 117B of the support portion 85 are connected to the base portion 84. The rear side latch receiving portion 104 is engaged. As described above, since the concave groove portion 115B and the concave groove portion 117B are formed with an inclination of 3 °, when the support portion 85 is attached to the base portion 84, the grinding portion 6 of the disc grinder 2 is inclined. The grinding part 6 can be brought into contact with an inclination. Next, the support portion 85 is held at two locations by the rubber belt 127 provided with hooks 126 at both ends. The hook 126 is locked in the hook insertion hole 96 of the support portion 85. A hook 126 is provided only at one end portion of the rubber belt 127, and the other end portion is fixed to a hook insertion hole 96 formed in the left plate portion 89 with bolts and nuts (not shown). The support portion 85 may be held by engaging with a hook insertion hole 96 formed in the right plate portion 90. The rubber belt 127 may be made of a material other than rubber as long as it can hold the disc grinder 2 and the support portion 85 on the base portion 84. In this embodiment, the front side latch receiving portion 101 is formed longer in the vertical direction (height direction) than the rear side latch receiving portion 104, so that the front side of the disc grinder 2 is higher than the rear side. It is fixed.

  As shown in FIGS. 17 and 18, the wheel unit 83 has wheels 128 arranged one by one on the left and right sides, and a wheel unit fixing portion 129 to which the wheels 128 are attached.

  The wheel unit fixing portion 129 is formed in a plate shape, and includes an axle fixing portion 131 for fixing the axle portion 130 of the wheel 128, a rectangular horizontal plate portion 132 bent about 95 ° from the axle fixing portion 131, and a horizontal plate portion. The vertical plate portion 133 is bent at a substantially right angle from 132 and extends upward.

  The axle fixing portion 131 is formed in a substantially rectangular shape, and has an axle hole 134 through which the axle portion 130 is inserted. The vertical plate portion 133 is formed in a substantially rectangular shape, and has a height adjustment hole 135 that is long in the longitudinal direction (vertical direction) of the vertical plate portion 133 (see FIG. 9).

  The wheel unit fixing portion 129 is attached to the left plate portion 89 and the right plate portion 90 of the base portion 84 by the clamp lever 136, respectively. By tightening the clamp lever 136, the wheel unit fixing portion 129 is fixed to the left plate portion 89 and the right plate portion 90, and by loosening the clamp lever 136, the wheel unit fixing portion 129 can be moved. Thereby, the distance D2 between the disc grinder 2 and the wheel 128 can be adjusted. In order to adjust the distance D2, the clamp lever 136 is loosened, the holding portion 82 is moved in the vertical direction, the clamp lever 136 is tightened at a desired position, and the holding portion 82 is fixed. In this embodiment, the wheel unit fixing portion 129 and the clamp lever 136 are distance adjusting mechanisms.

  As shown in FIG. 9, a restricting portion 137 formed in a substantially rectangular plate shape is fixed to the left plate portion 89 and the right plate portion 90 on the front side of the vertical plate portion 133. The restriction part 137 has two bolt holes (not shown). The bolts 139 are inserted into the bolt holes (not shown), and the bolts 139 are inserted into the left plate part 89 and the right plate part 90. The restricting portion 137 is fixed to the left plate portion 89 and the right plate portion 90 by being screwed into the drilled screw hole 98. The restricting portion 137 restricts the vertical plate portion 133 from moving to the front side.

  As shown mainly in FIG. 9, the operation base portion 62 of the operation portion 4 is fixed to the bottom plate portion 86 of the base portion 84 at two locations by U bolts 65. The U-bolt 65 externally fitted to the operation base portion 62 is inserted into the insertion hole 95 from the lower surface 140 side of the bottom plate portion 86 and is screwed to the nut 66 on the upper surface 141 side of the bottom plate portion 86.

  Here, a method of grinding the steel frame S as an object to be ground provided under the floor of the building using the grinding device 81 will be described. The height of the disc grinder 2 is adjusted in advance according to the distance between the steel frame S and the ground G. Then, as shown in the figure, the grinding portion 6 of the disc grinder 2 is brought into contact with the side surface 142 of the steel frame S. When the power button 10 of the switch box 9 is operated to turn on the power of the disc grinder 2, the grinding unit 6 starts to rotate and the side surface 142 of the steel frame S can be ground. The operator rolls the wheel 42 by pushing and pulling the operation unit 4 in the front-rear direction, and the rust, coating film, etc. attached to the side surface 142 (see FIG. 17) of the steel frame S along the longitudinal direction of the steel frame S. Dirt can be ground. Rust and coating film that have been ground and dropped onto the ground G may be collected after the grinding operation.

  In order to perform grinding of the side surface 143 on the opposite side of the steel frame S, as shown in FIG. 18, the disc grinder 2 is attached and used with the grinding portion 6 facing the left side. In order to change the direction of the disc grinder 2, the hook 126 is disengaged from the state where the grinding portion 6 shown in FIG. 17 faces the right side, the rubber belt 127 is removed, and the disc grinder 2 is fixed to the support portion 85. Lift up and remove from base 84. The disc grinder 2 and the support portion 85 are turned over, and the support portion 85 is attached to the base portion 84 with the grinding portion 6 facing left. At this time, the groove portion 115A is locked to the front side locking receiving portion 101, and the groove portion 117A is locked to the rear side locking receiving portion 104. Then, the hook 126 is locked in the hook insertion hole 96 and the disc grinder 2 and the support portion 85 are fixed to the base portion 84 by the rubber belt 127. And what is necessary is just to make the grinding part 6 contact | abut to the side surface 143 (refer FIG. 18) of the steel frame S. FIG.

  As described above, the grinding device 81 according to the present embodiment includes the disc grinder 2, the holding unit 82 that holds the disc grinder 2, the operation unit 4 that is attached to the holding unit 82, and the wheels 128 that are attached to the holding unit 82. , The wheel 128 is rolled to move the grinding device 81 below the workpiece, and the disc grinder 2 can grind the workpiece. For this reason, the operator does not have to go under the workpiece.

  In addition, the grinding device 81 of the present embodiment includes the wheel unit fixing portion 129 and the clamp lever 136 in which the holding portion 82 can adjust the distance D2 between the disc grinder 2 and the wheel 128, so that the grinding portion 6 of the disc grinder 2 can be adjusted. Can be adjusted to the height of the workpiece. Therefore, even a plurality of objects to be ground having different heights can be ground according to the height of each object to be ground.

  Further, the grinding apparatus 1 of the present embodiment has a grinding unit 6 for grinding the non-ground body by the disc grinder 2, and the disc grinder 2 can be attached with the grinding unit 6 facing sideways. The side surfaces 142 and 143 of the workpiece can be easily ground.

  In addition, the grinding device 1 of this embodiment is ground by raising and lowering the operation unit 4 because the grinding unit 6 is disposed in front of the wheel 128 and the operation unit 4 is disposed behind the wheel 128. The position of the part 6 in the vertical direction (height direction) can be adjusted. Therefore, without changing the height of the grinding part 6 by the wheel unit fixing part 129 and the clamp lever 136, the grinding operation can be performed while appropriately changing the position of the grinding part 6 by the operation of the operation part 4 by the operator. .

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, if it is possible to grind rust or a deteriorated coating film of the object to be ground, the grinding unit 6 may use a wire brush, a brass brush, a nylon brush or the like instead of a grindstone.

1 Grinding equipment 2 Disc grinder
3 Holding part 4 Operating part 6 Grinding part 12A Left support part (angle adjustment mechanism)
12B Right support (angle adjustment mechanism)
34 Hexagon bolt (angle adjustment mechanism)
38 Spacer (Angle adjustment mechanism)
42 Wheel 52 Mounting plate (distance adjustment mechanism)
56 Clamp lever (Distance adjustment mechanism)
61 Butting bolt (angle adjustment mechanism)
62 Operation base 63 Extension operation part 64 Operation end part 81 Grinding device 82 Holding part 128 Wheel 129 Wheel unit fixing part (distance adjustment mechanism)
136 Clamp lever (Distance adjustment mechanism)

Claims (7)

A grinding machine,
A holding unit for holding the grinding machine;
An operation unit attached to the holding unit;
And a wheel attached to the holding portion.   The grinding apparatus according to claim 1, wherein the holding unit includes a distance adjusting mechanism capable of adjusting a distance between the grinding machine and the wheel. The grinding machine has a grinding part for grinding a non-ground body;
The grinding apparatus according to claim 1 or 2, wherein the grinding machine can be attached with the grinding part facing upward. The grinding machine has a grinding part for grinding a non-ground body;
The grinding apparatus according to claim 1, wherein the grinding machine can be attached in a state where the grinding part faces sideways.   The grinding apparatus according to any one of claims 1 to 3, wherein the holding unit includes an angle adjustment mechanism capable of adjusting an attachment angle of the grinding machine.   The grinding apparatus according to claim 3, wherein the grinding unit is disposed in front of the wheel, and the operation unit is disposed in rear of the wheel.   The said operation part is comprised from the operation base part fixed to the said holding | maintenance part, and the length adjustment operation part connected with the said operation base part so that attachment or detachment is possible. The grinding apparatus described in 1.

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