JP3175567U - Grinding equipment - Google Patents

Abstract

The present invention provides a grinding apparatus capable of reducing the size and weight while maintaining the mechanical strength, improving the operability and working in a narrow space.
A first frame portion 11 having a generally U-shape and a second end portion integrally provided on a proximal end piece 15 with respect to a bent portion of the first frame portion 11. A main body frame 10 that has a frame portion 12 and is suspended by a hanging machine at a bent portion, and a grindstone 22 that is rotatably provided on a base end piece 15 of the first frame portion 11. The grinding part 20 that grinds the workpiece while being suspended by the suspension machine, and the distal end piece 16 on the distal end side opposite to the base end piece 15 with respect to the bent part of the first frame part 11. And a drive motor 30 that rotationally drives the grindstone 22 via a rotation transmission portion that is spanned between the grindstone 22 and a handle 40 that is attached to the second frame portion 12.
[Selection] Figure 1

Description

  The present invention relates to a suspended grinding apparatus that grinds an object to be ground while being suspended by a suspension machine.

  For example, a casting that has been taken out from a mold is formed with hot water, coughs, burrs, and the like that are unnecessary parts of the product. Therefore, in the post-casting process, a grinding process is performed using a grinder such as a grinder in order to remove these unnecessary portions and to make the rough surface a smooth surface.

  Such a grinding process is generally performed by a hand-held grinder or the like in the case of a casting that is large in size and heavy and difficult for an operator to hold. However, the grinding process performed by a hand-held grinder or the like increases the work time and the burden on the operator in proportion to the shape and size of the unnecessary part. Therefore, the present applicant can rotate the large-diameter grindstone with a large-capacity drive motor so that the grinding process can be performed in a short time, for example, by a hoisting machine such as a hoist type overhead crane. A so-called suspended grinding apparatus that can grind an object to be ground such as a cast in a suspended state has already been manufactured and sold (Non-Patent Document 1).

  For example, as shown in FIG. 13, a conventional suspended grinding apparatus 100 includes a linear main body frame 110, a grinding part 120 having a grindstone 122 for grinding an object to be ground, and a main body via a motor base 131. A drive motor 130 that is attached to the frame 110 and rotationally drives the grinding unit 120 and a handle 140 that is provided integrally with the main body frame 110 are provided.

  However, since the main body frame 110 is long and large, the suspension type grinding apparatus 100 requires a large work space and is heavy and difficult to handle.

  Furthermore, since the handle 140 is a fixed type, the grinding apparatus 100 has a restriction on the working posture. Furthermore, when the grinding apparatus 100 is lowered from the suspension machine and placed on the floor in order to replace the grindstone 122, for example, a stand is required. Furthermore, since the grinding device 100 has a wider grinding wheel cover 160 in order to easily replace the grinding wheel 122, the grinding device 100 blocks the field of view during the grinding process. Further, the grinding apparatus 100 is configured such that the motor base 131 is displaced when adjusting the tension of the connecting belt that connects the driven pulley of the grinding unit 120 and the driving pulley of the driving motor 130, and each pulley is adjusted each time the tension of the connecting belt is adjusted. It is necessary to rework the street, which is troublesome.

“Fujita Manufacturing Co., Ltd.” homepage, [Search January 27, 2012], Internet <URL http://www.fujitam.co.jp/>

  The present invention has been made in view of the above-described problems, and provides a grinding apparatus that achieves reduction in size and weight while maintaining mechanical strength, improving operability, and enabling work in a narrow space. For the purpose.

  In order to solve the above-described problems, a grinding apparatus according to the present invention includes a first frame portion that is formed in a generally U-shape, and a proximal end piece that is proximal to the bent portion of the first frame portion. A main body frame that is suspended by a hanging machine at the bent portion, and a grindstone that is rotatably provided on the base end piece of the first frame portion. A grinding part for grinding an object to be ground in a state where the main body frame is suspended from the suspension machine by the grindstone, and the base end piece with respect to the bent part of the first frame part Is attached to the tip piece on the opposite tip side, and a drive motor for rotating the grindstone via a rotation transmission portion spanned between the grindstone and a handle attached to the second frame portion With.

  According to the grinding apparatus according to the present invention, the first frame portion of the main body frame is provided so as to have a generally U-shape, thereby achieving reduction in size and weight while maintaining mechanical strength. It is possible to improve the operability and work in a narrow space.

It is the perspective view which showed the grinding device to which this invention is applied. It is the side view which showed the grinding device to which this invention is applied. It is the side view which showed the main body frame. It is the front view which showed the main body frame. It is the top view which showed the main body frame. It is the front view which showed the grinding device to which this invention is applied. It is the perspective view which showed a mode that a drive motor was attached to a main body frame via a motor base. It is the rear view which showed the main body frame. (A) is the top view which showed the handle, (B) is the side view which showed the handle. It is the side view which showed the state which put the grinding device to which this invention was applied on the floor. It is the perspective view which showed the state which opened the grindstone cover. It is sectional drawing which showed a mode that rotation of a rotating shaft was controlled by a fixing pin. It is the perspective view which showed the conventional grinding device.

  Hereinafter, a grinding apparatus to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, a grinding apparatus 1 to which the present invention is applied is a so-called suspension that grinds an object 2 while being suspended by a suspension machine such as a hoist type overhead crane. This is a lower mold grinding device. Such a suspended grinding apparatus 1 is used, for example, when grinding a workpiece 2 that is large and heavy and difficult for an operator to hold. Here, it is used when removing unnecessary parts formed on the workpiece 2 such as a casting taken out from the mold, such as a feeder, a cough, and a burr. Since the grinding device 1 is a suspension type grinding device, it can be easily and freely moved in the front-rear direction, the left-right direction, and the up-down direction by operating the suspension machine. Can be easily aligned. Furthermore, the grinding apparatus 1 can grind an unnecessary part of the workpiece 2 by being slid in the front-rear direction and / or the left-right direction by the operator after positioning with respect to the workpiece 2. .

  Specifically, as shown in FIGS. 1 and 2, the grinding device 1 has a generally U-shape, and can be rotated to a main body frame 10 that is suspended by a suspension machine and to a base end side of the main body frame 10. A grinding unit 20 that grinds the workpiece 2, a drive motor 30 that is attached to the distal end side of the main body frame 10 and rotates the grinding unit 20, and a base end side of the main body frame 10 with respect to the main body frame 10. And a handle 40 attached so as to be adjustable to an arbitrary angle in the vertical direction.

  As shown in FIG. 3, the main body frame 10 includes a first frame portion 11 that has a generally U-shape, a second frame portion 12 that is integrally provided on the upper surface side of the first frame portion 11, and The rib portion 13 is integrally provided on the lower surface side of the first frame portion 11. The first frame portion 11, the second frame portion 12, and the rib portion 13 are integrally formed with sufficient mechanical strength by, for example, casting.

  The first frame portion 11, which is formed in a letter-like shape as a whole, includes a proximal end piece 15 on the proximal end side with respect to the bent portion 14 and a distal end piece 16 on the distal end side with respect to the bent portion 14. The base end piece 15 and the front end piece 16 are formed in a plate shape and are provided integrally. In addition, a rib portion 13 is formed on the lower surface 15 a of the base end piece 15 and the lower surface 16 a of the distal end piece 16. As shown in FIG. 4, the rib portion 13 is formed in a plate shape, and is provided integrally with the base end piece 15 and the front end piece 16 so as to be substantially orthogonal to the base end piece 15 and the front end piece 16. .

  Further, as shown in FIG. 3, the second frame portion 12 is integrally provided on the upper surface 15 b of the base end piece 15. The second frame portion 12 is a long member having a substantially rectangular cross section, and a handle 40 is attached to one end 12a in the longitudinal direction so that the angle can be adjusted. A grinding part 20 for grinding the workpiece 2 is attached to the attachment part 19 on the lower surface 15 a of the base end piece 15. Further, a drive motor 30 that rotationally drives the grinding unit 20 via a motor base 31 is attached to the upper surface 16 b of the tip piece 16. The grinding unit 20, the drive motor 30, and the motor base 31 will be described later.

  Moreover, as shown in FIG.1 and FIG.3, the bending part 14 is provided with the attachment part 18 to which the attachment member 17 engaged with the hook part of a hanging machine is attached. The attachment portion 18 is formed in a block shape, and as shown in FIG. 5, a plurality of screw holes 18b for fastening the attachment member 17 are formed on the upper surface 18a. Here, two screw holes 18 b are formed at a predetermined interval in the width direction substantially orthogonal to the longitudinal direction of the first frame portion 11. In addition, the number and arrangement | positioning of the screw hole 18b are not limited to what was mentioned above, It can change suitably.

  The attachment member 17 attached to this attachment part 18 consists of steel materials etc., for example, and as shown in FIG. 1, it attaches to the 1st attachment piece 17a arrange | positioned at the upper surface 18a of the attachment part 18, and the hook part of a suspension machine. It is comprised with the 2nd attachment piece 17b engaged.

  The first mounting piece 17a is formed in a substantially U shape when viewed from the front, and a plurality of elongated through holes 17c are formed on the bottom surface at positions corresponding to the screw holes 18b of the mounting portion 18. After the first mounting piece 17a is arranged on the upper surface 18a of the mounting portion 18, the mounting member 17 is screwed into the screw hole 18b of the mounting portion 18 through the through hole 17c of the first mounting piece 17a. By being combined, it is attached to the attachment portion 18. At this time, since the attachment member 17 has the through hole 17c formed in a long hole shape, the weight balance before and after the grinding device 1 can be easily adjusted by moving the upper surface 18a of the attachment portion 18. Can do.

  The second mounting piece 17b is integrally provided, for example, on the side surface of the first mounting piece 17a by welding or the like, and a plurality of through holes 17e to be engaged with the hook portion of the suspension machine are formed. Here, two through holes 17 e are formed at a predetermined interval in the width direction of the first frame portion 11. The hook portion of the crane sling member 3 in which a plurality of rope members 3b such as a wire or a chain, which are locked to the hook portion of the suspension machine and provided with the hook portion 3a at the tip, are provided in the master ring 3c. 3a is engaged.

  Therefore, the grinding device 1 can be suspended by the suspension machine by attaching the attachment member 17 to the attachment portion 18 and engaging the hook portion 3a of the crane sling member 3 with the through hole 17e of the attachment member 17. it can. At this time, the grinding device 1 can ensure excellent equilibrium stability because the attachment member 17 is attached to the attachment portion 18 in consideration of the center of gravity balance. Furthermore, since the two through-holes 17e are formed in the attachment member 17 at predetermined intervals in the width direction, the grinding device 1 is suspended at two points. Therefore, the grinding device 1 can ensure excellent equilibrium stability.

  The attachment member 17 may be formed with only one through hole 17e, or may be formed with three or more. That is, the attachment member 17 only needs to have at least one through hole 17e.

  In addition, the crane sling member 3 may be provided with a turnbuckle whose total length can be adjusted by rotating the trunk portion instead of or in addition to the wire or the chain on the master ring 3c. Thereby, the grinding device 1 can set the level of the grinding part 20 or the parallelism to the workpiece 2 easily and with high accuracy by adjusting the overall length of the turnbuckle. Furthermore, the grinding device 1 can easily and highly accurately incline the grinding part 20 at a desired angle with respect to the workpiece 2 horizontally or by adjusting the overall length of the turnbuckle.

  As shown in FIG. 6, a grinding portion 20 for grinding the workpiece 2 is attached to the lower surface 15 a of the base end piece 15 of the first frame portion 11.

  The grinding unit 20 includes a rotating shaft 21 that is rotatably supported on the lower surface 15 a of the base end piece 15, and a grindstone 22 that is detachably attached to the rotating shaft 21 and grinds the workpiece 2.

  One end of the rotating shaft 21 protrudes to the left side of the base end piece 15 when viewed from the front, and the other end protrudes to the right side of the base end piece 15 when viewed from the front. It is rotatably supported by a bearing 23 housed in the formed mounting portion 19. The rotating shaft 21 has a grindstone 22 detachably attached to a protruding portion on one end side. Furthermore, the driven shaft 51 is attached to the rotating shaft 21 at the protruding portion on the other end side.

  The driven pulley 51 comprises a rotation transmission mechanism 50 by a drive pulley 52 and a connecting belt 53 on the side of the drive motor 30 which will be described later, and the rotation output of the drive motor 30 is transmitted via the rotation transmission mechanism 50, so Drive to rotate integrally. The rotating shaft 21 integrally rotates the grindstone 22 by the rotation output of the drive motor 30.

  The grindstone 22 is attached to and detached from the rotating shaft 21 by a conventionally known attachment / detachment structure. As the grindstone 22, for example, a disc-shaped grindstone having an outer diameter of 355 mm, a thickness of 50 mm, a mounting hole diameter of 38.1 mm, and a maximum use peripheral speed of 50 M / s or more is used. In addition, the grindstone 22 is not limited to this, For example, it can change suitably according to the kind and shape of the to-be-ground object 2, the capability of the drive motor 30, etc.

  As shown in FIG. 3, the attachment portion 19 to which such a grinding portion 20 is attached is formed in a cylindrical cross-section toward the width direction of the base end piece 15 on the base end side of the lower surface 15 a of the base end piece 15. ing. Specifically, as shown in FIG. 6, the mounting portion 19 includes a pair of bearing storage portions 19 a and 19 a in which a bearing 23 that rotatably supports the rotating shaft 21 is stored, and the pair of bearing storage portions 19 a. , 19a and a communication part 19b through which the rotary shaft 21 is inserted. The mounting portion 19 rotatably supports the rotating shaft 21 inserted therein by a bearing 23 housed in the bearing housing portions 19a and 19a.

  Further, as shown in FIG. 1, a drive motor 30 that rotationally drives the grinding unit 20 is attached to the tip piece 16 of the first frame unit 11.

  As the drive motor 30, a drive motor generally used in a conventional grinding apparatus is used. For example, the drive motor 30 is a three-phase AC motor having characteristics of an output of 2.2 Kw and a no-load rotation speed of about 1730 rotations per minute. The drive motor 30 is activated / stopped by an on / off operation of the motor operation unit 80, and the rotation output is transmitted to the grinding unit 20 by the rotation transmission mechanism 50 to rotate the grindstone 22. As shown in FIG. 6, such a drive motor 30 is attached to the upper surface 16 b of the tip piece 16 via the motor base 31 with its output shaft 30 a protruding from the tip piece 16 to the right in the front view. ing.

  Moreover, the drive pulley 52 is attached to the drive motor 30 at the protrusion part of the output shaft 30a. The drive pulley 52 comprises the rotation transmission mechanism 50 by the driven pulley 51 and the connecting belt 53 on the grinding unit 20 side described above, and transmits the rotation output of the drive motor 30 to the grindstone 22.

  When the power is supplied to the drive motor 30 and the output shaft 30 a is rotated, the rotation transmission mechanism 50 rotates the drive pulley 52 integral with the output shaft 30 a, and the rotation of the drive pulley 52 is transmitted via the connecting belt 53. This is transmitted to the driven pulley 51 to rotate the driven pulley 51. And the rotation transmission mechanism 50 rotates the grindstone 22 by rotating the rotating shaft 21 with which the driven pulley 51 is integral.

  The rotation transmission mechanism 50 is configured by a so-called belt transmission mechanism in which the connecting belt 53 is multiplied between the drive pulley 52 and the driven pulley 51 as described above, but is limited to such a belt transmission mechanism. is not. The rotation transmission mechanism 50 includes, for example, a multiple belt transmission mechanism in which a plurality of belt grooves are formed in the driving pulley 52 and the driven pulley 51 and a plurality of connecting belts are joined together, or a so-called chain transmission in which a chain is joined together. Another appropriate rotation transmission mechanism such as a mechanism may be employed.

  As shown in FIG. 7, the motor base 31 has the drive motor 30 attached to the upper surface 31 a and is attached to the upper surface 16 b of the tip piece 16. The motor base 31 is made of, for example, steel, and is formed in a substantially rectangular plate shape wider than the tip piece 16 and the drive motor 30.

  The motor base 31 has a plurality of first fixing holes 32 for fixing the drive motor 30. The first fixing holes 32 are, for example, screw holes, and a plurality of first fixing holes 32 are formed at positions corresponding to the mounting holes 30 b formed in the drive motor 30. Here, the drive motor 30 is formed with four mounting holes 30 b, and the motor base 31 is formed with four first fixing holes 32. The number and arrangement of the attachment holes 30b and the first fixing holes 32 can be changed as appropriate. After the drive motor 30 is disposed on the upper surface 31a, the motor base 31 is fastened to the first fixing hole 32 from the drive motor 30 side via the mounting hole 30b, whereby the drive motor 30 is mounted on the upper surface 31a. Is attached.

  Further, the motor base 31 is formed with a plurality of second fixing holes 34 for fixing the motor base 31 to the upper surface 16 b of the tip piece 16. The second fixing hole 34 is, for example, a screw hole, and a plurality of the second fixing holes 34 are formed at positions corresponding to the elongated mounting holes 16 c formed in the upper surface 16 b of the tip piece 16. Here, four oblong mounting holes 16c are formed in the upper surface 16b of the tip piece 16, and four second fixing holes 34 are formed in the motor base 31 at positions corresponding to the mounting holes 16c. Has been. The number and arrangement of the mounting holes 16c and the second fixing holes 34 can be changed as appropriate. In the motor base 31, for example, after the drive motor 30 is attached to the upper surface 31a and disposed on the upper surface 16b of the tip piece 16, the screw 35 is connected to the second fixing hole 34 from the tip piece 16 side through the attachment hole 16c. Is attached to the upper surface 16 b of the tip piece 16. The first fixing hole 32 and the second fixing hole 34 are through holes, and the drive motor 30 and the motor base 31, and the motor base 31 and the tip piece 16 are fastened with bolts and nuts, respectively. May be.

  Further, a guide portion 31 c is formed on the lower surface 31 b of the motor base 31. The guide portion 31c is formed in a concave shape on the lower surface 31b of the motor base 31 in the longitudinal direction. When the motor base 31 is disposed on the upper surface 16 b of the tip piece 16, the guide portion 31 c engages with a guide rail 36 that is formed on the upper surface 16 b of the tip piece 16 so as to protrude in the longitudinal direction of the tip piece 16. Is done. That is, the motor base 31 is combined with the tip piece 16 in an inlay shape. The guide portion 31 c is guided by the guide rail 36 when the motor base 31 is moved in a direction (longitudinal direction) approaching and separating from the grinding portion 20 by being engaged with the guide rail 36. Thereby, the motor base 31 can move in parallel with the direction of approaching and separating from the grinding part 20 on the upper surface 16 b of the tip piece 16.

  In the conventional grinding apparatus 100, as shown in FIG. 13, when adjusting the tension of the connecting belt, the motor base 131 is only temporarily fixed to the elongated mounting hole of the main body frame 110 by bolts and nuts. Therefore, when the motor base 131 is moved in the direction of approaching and separating from the grinding part 120, the motor base 131 is displaced, and the parallelism between the driving pulley and the driven pulley is upset. For this reason, in the conventional grinding apparatus 100, a pair of tension adjusting bolts 137 are provided at positions corresponding to both longitudinal sides of the motor base 131 of the main body frame 110, and the protruding amounts of the four tension adjusting bolts 137 are provided. It is necessary to readjust the parallelism of the driving pulley and the driven pulley while adjusting the tension of the connecting belt while adjusting the tension of the connecting belt to reset the pulley.

  On the other hand, the motor base 31 moves parallel to the direction of approaching and separating from the grinding unit 20 on the upper surface 16b of the tip piece 16 because the guide portion 31c is engaged with the guide rail 36. Can do. Therefore, in the grinding apparatus 1, it is not necessary to readjust the parallelism when adjusting the tension of the connecting belt 53. Therefore, in the grinding apparatus 1, it is possible to adjust the tension of the connecting belt 53 more easily than in the conventional grinding apparatus 100, and it is possible to shorten the work time for tension adjustment.

  Further, as shown in FIG. 1, in the grinding apparatus 1, it is only necessary to provide one adjustment bolt 37 for adjusting the tension of the connecting belt 53 at a position corresponding to any side surface of the motor base 31 in the longitudinal direction. Here, as shown in FIG. 8, an adjustment screw hole 18 d is formed in the side surface 18 c of the mounting portion 18, and one adjustment bolt 37 is provided. In the grinding apparatus 1, the adjustment bolt 37 is screwed into the adjustment screw hole 18 d to adjust the protrusion amount of the adjustment bolt 37 with respect to the mounting portion 18, and the motor base 31 is brought close to the grinding portion 20. The tension of the connecting belt 53 is adjusted by moving it parallel to the separating direction. Therefore, the tension of the connecting belt 53 can be adjusted more easily in the grinding device 1 than in the conventional grinding device 100. Furthermore, in the grinding apparatus 1, the configuration can be simplified, the number of parts can be reduced, and the cost can be reduced as compared with the conventional grinding apparatus 100.

  As shown in FIGS. 1 and 2, a handle 40 is attached to one end 12 a of the second frame portion 12 so as to be adjustable at an arbitrary angle in the vertical direction with respect to the second frame portion 12. .

  As shown in FIGS. 9A and 9B, the handle 40 includes an operation portion 41 that is substantially U-shaped in plan view and a mounting portion 42 that is provided integrally with the operation portion 41. . The operation unit 41 is formed by bending or welding a pipe member having a substantially circular or square cross section made of a metal material or the like. Specifically, the operation unit 41 includes a connecting portion 41a and a pair of gripping portions 41b and 41b provided at both ends of the connecting portion 41a so as to be substantially orthogonal to the connecting portion 41a. The attachment portion 42 is configured by a pipe member having a predetermined length and made of a metal material or the like and having a substantially circular or square cross section. One end 42a of the mounting portion 42 is provided integrally with the connecting portion 41a. At this time, the operation unit 41 is provided, for example, such that the gripping part 41b is substantially parallel to the attachment part 42 in a plan view and has a predetermined angle in the vertical direction in a side view.

  Furthermore, an engaging shaft portion 43 is formed on the other end portion 42b of the mounting portion 42 or in the vicinity thereof so as to project substantially parallel to the axial direction of the connecting portion 41a. The engaging shaft portion 43 is disposed in the handle post hole 45a having a semicircular cross section formed in the one end 12a of the second frame portion 12, and then the handle post hole 45a and the one end 12a of the second frame portion 12. And a handle post hole 45b having a semicircular cross section of the handle post 44 attached to the handle post 44. As a result, the handle 40 is attached to the one end 12 a of the second frame portion 12.

  As shown in FIG. 3, the handle post 44 for attaching the handle 40 to the one end 12a of the second frame portion 12 is constituted by a rectangular parallelepiped member made of a metal material. The handle post 44 has a semi-circular handle post hole 45b having substantially the same diameter as the handle post hole 45a at a position facing the handle post hole 45a on one side surface 44a that contacts the one end 12a of the second frame portion 12. Is formed. When the handle post 44 is attached to the one end 12a of the second frame portion 12, the handle post hole 45b is formed with the handle post hole 45a of the second frame portion 12 so that the handle post hole 45 has a substantially circular cross section. Form. The handle post hole 45 is formed to have a diameter substantially the same as or slightly smaller than the engagement shaft portion 43.

  Furthermore, a plurality of screw holes 12b for fastening the handle posts 44 are formed at one end 12a of the second frame portion 12. The handle post 44 has a through hole 44b at a position corresponding to the screw hole 12b. Here, two screw holes 12b and two through holes 44b are formed. The numbers of the screw holes 12b and the through holes 44b can be changed as appropriate. The handle post 44 is attached to the one end 12a of the second frame portion 12 by fastening the screw 46 from the handle post 44 side to the screw hole 12b of the one end 12a of the second frame portion 12 through the through hole 44b. It is done. Here, a clamp lever is used as one screw 46. Thus, the operator can freely tighten and loosen the screw 46 without a tool.

  Accordingly, after the handle 40 is set so that the engagement shaft portion 43 is disposed in the handle post hole 45a of the second frame portion 12 and has a predetermined angle in the vertical direction with respect to the second frame portion 12. By attaching the handle post 44 to the one end 12a of the second frame portion 12, the engaging shaft portion 43 is held between the handle post hole 45a and the handle post hole 45b of the handle post 44, and the second frame portion 12 is attached to one end 12a.

  Therefore, the grinding device 1 loosens or tightens the screw 46 that fastens the handle post 44 to the one end 12 a of the second frame portion 12, so that the handle 40 can be arbitrarily moved in the vertical direction with respect to the second frame portion 12. Can be adjusted to any angle. Therefore, the grinding device 1 can freely adjust the angle according to the height of the worker, the work content, etc., and there is no restriction on the work posture, so that the operability can be improved.

  Furthermore, as shown in FIG. 10, the grinding apparatus 1 is lowered from the suspension machine by, for example, replacing the grindstone 22 by adjusting the angle of the handle 40 so as to be substantially orthogonal to the second frame portion 12. In contrast, unlike the conventional grinding apparatus 100, it can be placed directly on the floor 4 or the like without a stand. Therefore, the grinding device 1 can perform the replacement work of the grindstone 22 more easily than the conventional grinding device 100.

  Furthermore, as shown in FIG. 1, a motor operation unit 80 is attached to one gripping part 41 b of the operation unit 41. As shown in FIG. 9A, the motor operation unit 80 is attached on a holder 41c provided on one gripping portion 41b of the operation unit 41. The motor operation unit 80 includes a switch for performing on / off operation of power supply to the drive motor 30. For example, when the operator turns on the drive motor 30, the drive motor 30 rotates, and when the drive motor 30 is turned off, the drive is performed. The rotation drive of the motor 30 is stopped. The motor operation unit 80 can be operated at hand by being attached to the grip 41b of the operation unit 41, and can be easily operated even during work.

  Further, as shown in FIG. 1, a crane operation portion 81 is attached to the other gripping portion 41 b of the operation portion 41. The crane operation unit 81 is attached on a holder 41d provided on the other gripping part 41b of the operation unit 41, as shown in FIG. The crane operation unit 81 includes a switch for performing an operation for moving the suspension machine in the front-rear direction, the left-right direction, and the up-down direction. When operated by an operator, the crane operation unit 81 moves the suspension machine in the front-rear direction and the left-right direction, or the amount of the rope member drawn from the suspension machine changes, whereby the grinding device 1 is moved in the front-rear direction, the left-right direction, and the up-down direction. The crane operation part 81 can be operated by hand by being attached to the grip part 41b of the operation part 41, and can be easily operated even during work.

  Further, as shown in FIGS. 1 and 11, a grindstone cover 60 that covers the upper part of the grindstone 22 is attached to the side surface of the first frame portion 11 on the left side when viewed from the front (right side in FIGS. 1 and 11). It has been.

  Specifically, the grindstone cover 60 is formed in a semi-cylindrical shape with a sheet metal or the like, and is formed in a semicircular shape with a first cover portion 61 that houses the grindstone 22 therein, and the first cover portion 61. And a second cover portion 63 that is connected through a hinge portion 62 so as to be openable and closable. As shown in FIG. 3, the first cover portion 61 includes, for example, a cover attachment portion 13 a formed on the rib portion 13 of the first frame portion 11, a cover attachment portion 18 e formed on the attachment portion 18, and a second cover attachment portion 18 e. Are attached to a cover attachment portion 12c formed on the frame portion 12 by a fastening member such as a screw.

  Further, as shown in FIGS. 1 and 11, the first cover portion 61 is provided with at least one knob 64 on the outer peripheral portion. Here, one knob 64 is provided at a position symmetrical to the hinge portion 62 with the grindstone 22 interposed therebetween, and one knob 64 is provided at a substantially intermediate position between the symmetrical position and the hinge portion 62. The number and arrangement of the knobs 64 can be changed as appropriate. The knob 64 is provided so as to be rotatable in a direction of approaching and separating from the second cover portion 63. The second cover portion 63 is provided with an engaged portion 65 to which the knob 64 is engaged at a position corresponding to the knob 64. In the engaged portion 65, for example, a notch 65b having a width substantially the same as the diameter of the knob 64 is formed on a protrusion 65a protruding outward from the edge 63a of the second cover portion 63. The knob 64 is engaged with the portion 65b.

  Therefore, as shown in FIG. 1, in the grindstone cover 60, the second cover portion 63 closes the first cover portion 61, and the knob 64 is rotated toward the second cover portion 63 to engage the engaged portion. By engaging 65, the upper part of the grindstone 22 can be covered and the closed state can be maintained. Therefore, the grindstone cover 60 can prevent the operator from being in danger during grinding, for example, and can reduce adhesion and scattering of dust and the like on the grindstone 22.

  Further, as shown in FIG. 11, the grindstone cover 60 releases the engagement state between the knob 64 and the engaged portion 65 by rotating the knob 64 to the side away from the second cover portion 63. Further, the side surface of the grindstone 22 can be exposed by rotating the second cover portion 63 around the hinge portion 62 in a direction away from the first cover portion 61. Therefore, the grindstone cover 60 can easily replace the grindstone 22 as compared with the conventional grinding apparatus 100. Furthermore, the grindstone cover 60 can be narrower than the conventional grinding apparatus 100, and can prevent the view from being obstructed during the grinding process. The grindstone cover 60 may be configured such that the engaged portion 65 is provided in the first cover portion 61 and the knob 64 is provided in the second cover portion 63.

  As shown in FIG. 3, the base end piece 15 of the first frame portion 11 has a through hole 15 d through which a fixing pin 90 that restricts the rotation of the rotating shaft 21 is inserted when the grindstone 22 is replaced. Is formed. The through hole 15d is formed so that the outside communicates with the communication portion 19b of the attachment portion 19. Further, as shown in FIG. 6, the rotation shaft 21 is formed with a rotation restricting hole 21a at a position corresponding to the through hole 15d. As shown in FIG. 12, when the grindstone 22 is replaced, the rotation shaft 21 is engaged with the fixing pin 90 across the through hole 15d and the rotation restriction hole 21a, and the rotation is restricted. Therefore, the grinding device 1 can regulate the rotation of the rotating shaft 21 by the fixing pin 90 when the grindstone 22 is replaced, and can easily replace the grindstone 22.

  Further, as shown in FIGS. 1 and 2, a rotation transmission mechanism cover 70 that covers the rotation transmission mechanism 50 is provided on the side surface of the first frame portion 11 on the right side in the front view (left side in FIGS. 1 and 2). It is attached. The rotation transmission mechanism cover 70 is formed in a bottomed elliptical cylinder shape by sheet metal or the like so as to cover the driving pulley 52, the driven pulley 51, and the connecting belt 53. As shown in FIG. 3, such a rotation transmission mechanism cover 70 is formed on, for example, the cover attachment portion 15 c formed on the base end piece 15 of the first frame portion 11 and the tip piece 16 of the first frame portion 11. The cover attaching part 16d formed and the cover attaching part 18e formed on the attaching part 18 are attached by fastening members such as screws. The rotation transmission mechanism cover 70 covers the drive pulley 52, the driven pulley 51, and the connecting belt 53 of the rotation transmission mechanism 50, thereby protecting the rotation transmission mechanism 50 and preventing the danger of the operator. Adhesion of dust or the like can be reduced.

  Next, the operation of the grinding apparatus 1 having the above configuration will be described. Specifically, the operation from the state in which the grinding apparatus 1 is placed on the floor 4 to the grinding of the workpiece 2 will be described.

  First, as shown in FIG. 10, the grinding device 1 is mounted on the mounting portion 40 while the handle 40 is directly placed on the floor 4 with the angle adjusted so as to be substantially orthogonal to the second frame portion 12. The hook portion 3a of the crane sling member 3 that is locked to the hook portion of the suspension machine is engaged with the through holes 17e and 17e of the attachment member 17 attached to 18.

  Next, as shown in FIGS. 1 and 2, in the grinding apparatus 1, the crane operation unit 81 is operated by an operator, is moved upward, and is suspended by a suspension machine. Next, in the grinding apparatus 1, the screw 46 that fastens the one end 12 a of the second frame portion 12 and the handle post 44 is loosened by the operator, and the handle 40 is arbitrarily positioned in the vertical direction with respect to the second frame portion 12. Then, the screw 46 is retightened, and the handle 40 is adjusted to an arbitrary angle in the vertical direction with respect to the second frame portion 12.

  Next, in the grinding apparatus 1, the crane operation unit 81 is operated by an operator, and the grinding apparatus 1 is moved in the front-rear direction, the left-right direction, and the up-down direction, and is aligned with the workpiece 2. At this time, in the grinding apparatus 1, the operator adjusts the overall length of the turnbuckle to adjust the level of the grindstone 22 and the parallelism to the workpiece 2, or the level of the grindstone 22 and the workpiece 2 are adjusted. Is adjusted to be inclined at a desired angle.

  Next, the grinding device 1 is turned on by the operator at the motor operation unit 80, the drive motor 30 is rotationally driven, and the rotation output of the drive motor 30 is transmitted to the grinding unit 20 by the rotation transmission mechanism 50, and the grindstone 22. Is driven to rotate. Next, in the grinding apparatus 1, the gripping portions 41b and 41b are gripped by an operator and slid in the front-rear direction and / or the left-right direction, and unnecessary portions of the workpiece 2 are ground.

  As described above, the grinding apparatus 1 grinds an unnecessary portion of the workpiece 2 while being suspended by the suspension machine.

  In the grinding apparatus 1 to which the present invention is applied, since the first frame portion 11 is provided so as to be entirely in the shape of a letter, the size and weight are reduced as compared with the main body frame 110 of the conventional grinding apparatus 100. Therefore, the entire apparatus can be made smaller and lighter than the conventional grinding apparatus 100. Accordingly, the grinding device 1 has improved operability and can be operated in a narrow work space. Furthermore, since the 1st frame part 11 is provided with the rib part 13 over the whole lower surface, even if the grinding apparatus 1 is provided so that the whole may form a square shape, sufficient mechanical strength is provided. Can have.

  Further, the grinding device 1 loosens or retightens the screw 46 that fastens the handle post 44 to the one end 12 a of the second frame portion 12, thereby moving the handle 40 in the vertical direction with respect to the second frame portion 12. It can be adjusted to any angle. Therefore, the grinding device 1 can freely adjust the angle according to the height of the worker, the work content, etc., and there is no restriction on the work posture, so that the operability can be improved.

  Furthermore, the grinding apparatus 1 adjusts the angle of the handle 40 so as to be substantially orthogonal to the second frame portion 12, for example, when the grinding apparatus 1 is lowered from the suspension machine by exchanging the grindstone 22. Unlike 100, it can be placed directly on the floor 4 or the like without a stand. Therefore, the grinding device 1 can perform the replacement work of the grindstone 22 more easily than the conventional grinding device 100.

  Further, the grinding device 1 has a first cover portion 61 that houses the grindstone 22 therein, and a second cover portion 63 that is connected to the first cover portion 61 via a hinge portion 62 so as to be opened and closed. In addition, a grindstone cover 60 that covers a part of the grindstone 22 is provided, and either one of the first cover portion 61 and the second cover portion 63 is provided with a knob 64, and the other is provided with a knob 64. Since the engaged portion 65 to be engaged is provided, the engagement state between the knob 64 and the engaged portion 65 is released, and the second cover portion 63 is moved to the first cover around the hinge portion 62. The side surface of the grindstone 22 can be exposed by rotating in a direction away from the portion 61. Therefore, the grinding apparatus 1 does not need to remove the grindstone cover 60 from the main body frame 10 when exchanging the grindstone 22, and can perform the exchanging work of the grindstone 22 more easily than the conventional grinding apparatus 100.

  Further, in the grinding apparatus 1, the rotation shaft 21 has a rotation restriction hole 21 a on the outer peripheral surface, and a through hole 15 d is formed at a position corresponding to the rotation restriction hole 21 a of the base end piece 15 of the first frame portion 11. Therefore, the rotation of the rotating shaft 21 can be restricted by engaging the fixing pin 90 across the through hole 15d and the rotation restricting hole 21a. Therefore, the grinding device 1 can regulate the rotation of the rotating shaft 21 by the fixing pin 90 when the grindstone 22 is replaced, and can easily replace the grindstone 22.

  Further, the grinding apparatus 1 includes a guide portion engaged with a guide rail 36 formed on the motor base 31 on the upper surface 16b of the tip piece 16 of the first frame portion 11 so as to approach and separate from the grinding portion 20. Since 31c is formed, when the motor base 31 is moved in the direction approaching and separating from the grinding part 20, it is guided by the guide rail 36, and the motor base 31 is approached and separated from the grindstone 22. Can move in parallel. Therefore, in the grinding apparatus 1, it is not necessary to readjust the parallelism when adjusting the tension of the connecting belt 53, the tension of the connecting belt 53 can be easily adjusted, and the work time for adjusting the tension is shortened. be able to.

  The suspension machine is not limited to a hoist type overhead crane, and any other suspension crane or post type jib crane can be used as long as it can suspend the grinding apparatus 1. Good.

  Further, the grinding device 1 to which the present invention is applied is not limited to the grinding device 1 shown in the above-described embodiment described with reference to the drawings, and the utility model registration claims attached to the present specification and Various changes and replacements can be made to the constituent elements without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Grinding device, 2 Workpiece, 3 Crane sling member, 3a Hook part, 3b Rope member, 3c Mastering, 4 Floor, 10 Main body frame, 11 1st frame part, 12 2nd frame part, 12a One end, 12b Screw hole, 12c Cover mounting portion, 13 Rib portion, 13a Cover mounting portion, 14 Bending portion, 15 Base end piece, 15a Lower surface, 15b Upper surface, 15c Cover mounting portion, 15d Through hole, 16 Tip piece, 16a Lower surface, 16b Upper surface, 16c mounting hole, 16d cover mounting portion, 17 mounting member, 17a first mounting piece, 17b second mounting piece, 17c through hole, 17d screw, 17e through hole, 18 mounting portion, 18a upper surface, 18b screw hole , 18c side surface, 18d adjusting screw hole, 18e cover mounting portion, 19 mounting portion, 19a bearing housing portion, 19 Communication part, 20 Grinding part, 21 Rotating shaft, 21a Rotation restricting hole, 22 Grinding stone, 23 Bearing, 30 Drive motor, 30a Output shaft, 30b Mounting hole, 31 Motor base, 31a Upper surface, 31b Lower surface, 31c Guide part, 32 1 screw hole, 33 screw, 34 second screw hole, 35 screw, 36 guide rail, 37 adjustment bolt, 40 handle, 41 operation part, 41a connecting part, 41b gripping part, 41c holder, 41d holder, 42 mounting Part, 42a one end part, 42b other end part, 43 engagement convex part, 44 handle post, 44a one side, 44b through hole, 45 handle post hole, 46 screw, 50 rotation transmission mechanism, 51 driven pulley, 52 drive pulley, 53 connecting belt, 60 grinding wheel cover, 61 first cover part, 62 hinge part, 63 second cover Part, 63a edge part, 64 knob, 65 engaged part, 65a protrusion, 65b notch part, 70 rotation transmission mechanism cover, 80 motor operation part, 81 crane operation part, 90 fixing pin

Claims (7)

A first frame part having a generally U-shape, and a second frame part integrally provided on a proximal end piece on the proximal side with respect to the bent part of the first frame part; A main body frame suspended by a suspension machine at the bent portion;
A grinding part that has a grindstone rotatably provided on a base end piece of the first frame part, and grinds an object to be ground in a state where the main body frame is suspended from the suspension machine by the grindstone;
The grindstone is attached to the distal end piece on the side opposite to the base end piece with respect to the bent portion of the first frame portion, and the grindstone is connected to the grindstone via a rotation transmission portion. A drive motor for rotational driving;
A grinding apparatus comprising: a handle attached to the second frame portion.   2. The grinding apparatus according to claim 1, wherein the handle is attached to the second frame portion so as to be rotatable in the vertical direction. A grindstone cover attached to the first frame portion and covering a part of the grindstone;
The grindstone cover includes a first cover portion that houses the grindstone therein, and a second cover portion that is openably and closably connected to the first cover portion via a hinge portion,
One of the first cover part and the second cover part is provided with a knob, and the other is engaged with an engaged part to which the knob is engaged,
The first cover part and the second cover part are maintained in a closed state when the knob is engaged with the engaging part. Grinding equipment. The grinding part further includes a rotating shaft that is rotatably supported by the base end piece of the first frame part and to which the grindstone is detachably attached,
The rotation shaft has a rotation restricting hole on an outer peripheral surface, and a fixing pin is engaged between the through hole formed in the base end piece of the first frame portion and the rotation restricting hole, so that the rotation shaft is rotated. 4. The grinding apparatus according to claim 1, wherein the grinding apparatus is regulated. A motor base for attaching the drive motor to the tip piece of the first frame portion;
The said motor base has a guide part engaged with the guide rail formed in the direction which adjoins and separates with respect to the said grindstone on the upper surface of the front-end | tip piece of the said 1st frame part, The 1st thru | or characterized by the above-mentioned. 4. The grinding apparatus according to any one of 4 above.   6. The grinding apparatus according to claim 1, wherein a rib is provided on the first frame portion.   The grinding apparatus according to claim 1, wherein the first frame part is integrally formed by casting.

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