JP2011011268A - Deburring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deburring tool easily mounted to a hole of a workpiece and capable of efficiently removing burrs at the rear side of the workpiece from a surface side.SOLUTION: The deburring tool 10 removes the burrs 3 at the rear side generated during drilling 2 of the workpiece 1 from the surface side. The deburring tool 10 includes an outer cylinder 11 inserted into the hole 2, an operating shaft 12 that is movable in an axial direction to the outer cylinder 11 and is relatively nonrotatably fitted thereto, deburring chips 15 freely turnably mounted in a plurality of openings 13 formed in a circumferential direction at intervals at the tip part of the outer cylinder 11 through a pivot pin 14 and appearable at a use position where they are projected to the outside of the outer cylinder 11 and at a storage position where they are stored in the outer cylinder 11, and switching means 16 arranged at the operating shaft 12 and the deburring chips 15 and allowing the deburring chips 15 to be switched to the use position and the storage position by the operation of the operating shaft 12 in the axial direction.

Description

  The present invention relates to a deburring tool that removes burrs on the back side, which are generated when a workpiece having a closed cross section such as a column is drilled, from the front side.

  When drilling a workpiece with a drill, a burr protrudes along the edge of the drilling hole on the back side of the workpiece, and the bolt sits down when the fingers are damaged or the bolt is assembled to the drilling. Since it becomes unstable, deburring work is performed after drilling.

  Usually, the deburring work from the workpiece is removed by forming a countersink at the rim of the drilling hole from the back side of the workpiece with an electric tool. However, when drilling is performed on a workpiece with a closed cross-section like a square column used in buildings such as high-rise buildings, the power tool cannot be placed inside the column. The burr is removed like this. That is, a method in which a deburring tool such as a spherical grindstone or a spherical cutting tool is attached to the tip of an electric power tool, the deburring tool is pierced from the outer surface side of the column, and the deburring tool is used to remove the deburring Is adopted. However, when removing burrs by this method, it is necessary to remove burrs while moving the deburring tool along the edge of the drilling hole. There was a problem that burrs could not be removed.

  Therefore, a cylindrical body that can be penetrated through the perforation of the workpiece, a deburring member that can be inserted into and retracted from the opening at the tip of the cylindrical body, and that can rotate integrally with the cylindrical body, and a shaft mounted on the cylindrical body A pressing member that is provided so as to be movable in the direction and projects the deburring member outward from the peripheral surface of the cylindrical body, an operating member that can operate the pressing member in the axial direction, and a return spring for the operating member, Has been proposed (for example, see Patent Document 1).

JP 2007-144553 A

  By the way, the deburring tool described in Patent Document 1 is made on the assumption that the burr is removed by manual operation, and the deburring tool is operated while pushing the pressing member against the urging force of the return spring. In order to remove the burrs by rotating the tool, the burrs removal work has been a very complicated work manually. Moreover, since the deburring member can be moved in and out in a state where the pressing member is returned by the return spring, one or more burrs are inserted when the deburring tool is inserted into the drilled hole formed in the horizontal direction. The deburring member may protrude outward due to its own weight, and the deburring member protruding outward is caught on the edge of the drilling, and there is a problem that it takes time to insert the deburring tool into the drilling.

  An object of the present invention is to provide a deburring tool that can be easily attached to a drilling hole of a workpiece and can efficiently remove burrs on the back side of the workpiece from the front side.

  A deburring tool according to the present invention is a deburring tool for removing a burr on the back side generated during drilling of a workpiece from the front side, and an outer cylinder that can be inserted through the drilling, and an axial direction with respect to the outer cylinder And a plurality of openings formed at intervals in the circumferential direction at the distal end portion of the outer cylinder so as to be rotatable via pivot pins. The deburring tip that can be moved in and out of the use position protruding outside the outer cylinder and the storage position stored in the outer cylinder, and the operation shaft and the deburring tip are provided, and the operation shaft is operated in the axial direction. The deburring chip is provided with switching means capable of switching between a use position and a storage position.

  In this deburring tool, the deburring tool is inserted into the drilling hole of the workpiece until the tip protrudes to the back side of the workpiece with the deburring tip immersed in the storage position by the switching means, and then switched. When the workpiece is drilled by the deburring tip that rotates along with the outer cylinder, the deburring tip protrudes to the working position by means, and the deburring tool moves in the pulling direction while rotating the deburring tool with the electric tool. The burrs on the back side will be removed by cutting. Then, after deburring, the deburring tip is rotated to the storage position by the switching means, and the deburring tool is extracted from the perforation of the workpiece. In this way, in this deburring tool, the position of the deburring tip can be switched between the use position and the storage position by the switching means. Therefore, when the deburring tool is inserted into the drilling of the workpiece, the deburring tip has its own weight. , It is possible to effectively prevent some deburring tips from rotating toward the use position, and to smoothly insert the deburring tool into the drilling of the workpiece, and to remove the deburring In this case, insert the deburring tool into the drilling of the work piece, rotate the deburring tip to the working position, and then rotate the deburring tool with the electric tool. Edge burrs can be removed smoothly and cleanly over the entire circumference.

  Here, in the preferred embodiment, as the switching means, an annular groove is formed in the vicinity of the distal end of the operating shaft, and a protrusion inserted into the annular groove is formed in the proximal end portion of the deburring tip. In this case, the protrusion of the deburring tip comes into contact with one axial end surface of the annular groove, the deburring tip is switched to one of the use position and the storage position, and the protrusion of the deburring tip is changed to the other end of the annular groove. By contacting the end face in the axial direction, the deburring tip is switched to the other of the use position and the storage position. Then, the position of the deburring tip can be reliably and stably switched between the use position and the storage position by the switching means having such a simple structure including the annular groove and the projection.

  One of the base end corners of the deburring tip is pivotally supported by the pivot pin, and the deburring tip is held at the use position on the other base end corner of the deburring tip. It is also a preferred embodiment to form a contact portion that contacts the surface. In this case, the contact portion abuts against the operation shaft, so that the reaction force against the operation force in the pulling direction of the deburring tool that acts on the deburring tip at the time of deburring can be received without difficulty. .

  It is also a preferred embodiment to provide a click mechanism that restricts movement of the operation shaft relative to the outer cylinder and holds the deburring tip between the use position and the storage position so that the position can be switched. In this case, the deburring tip moved to the use position is rotated to the storage position side due to vibration or the like during operation of the deburring tool, or the deburring tip moved to the storage position is rotated to the use position side. Can be effectively prevented and the operability of the deburring tool can be improved.

  It is also a preferred embodiment to provide a positioning means for fitting to the edge of the perforation on the surface side of the workpiece to position the base side of the outer cylinder so as to be rotatable relative to the perforation. By providing such positioning means, the base side of the deburring tool can be positioned concentrically with the drilling, so that the stability of the deburring tool during deburring can be improved.

  It is also preferable to form a chucking portion that protrudes outward from the outer cylinder at the base end portion of the operation shaft and is detachably held by the chuck of the electric tool. If comprised in this way, compared with the case where an outer cylinder is hold | maintained at the chuck | zipper of an electric tool, the number of parts of a deburring tool can be decreased and the manufacturing cost can be reduced.

  A conical guide member may be attached to the tip of the outer cylinder. In this case, the insertion property of the deburring tool with respect to the drilling of the workpiece can be improved by the guide member.

  According to the deburring tool of the present invention, since the deburring tip can be switched between the use position and the storage position by the switching means, when the deburring tool is inserted into the drilling of the workpiece, the weight of the deburring tip is reduced. This effectively prevents some deburring tips from turning to the use position, allowing the deburring tool to be smoothly inserted into the workpiece and removing burrs. When removing the deburring tool, insert the deburring tool into the drilling of the workpiece, rotate the deburring tip to the working position, and then rotate the deburring tool with the electric tool. The burr at the lip can be removed smoothly and beautifully over the entire circumference.

Perspective view of deburring tool (A) of the deburring tool is a longitudinal sectional view with the deburring tip rotated to the storage position, and (b) is a longitudinal sectional view of the deburring tip rotated to the use position. (A) of the deburring tool is a vertical cross-sectional view of the main part when the deburring tip is rotated to the storage position, and (b) is a vertical cross-sectional view of the main part when the deburring chip is rotated to the use position. Figure Longitudinal section around the click mechanism End view of V-V line in Fig. 2 Sectional view taken along line VI-VI in Fig. 2 (A) of the deburring tool with the positioning means attached is a longitudinal sectional view of the deburring tip rotated to the storage position, and (b) is a state of rotating the deburring tip to the use position. Longitudinal section at Perspective view of deburring tool with other configuration (A) of the deburring tool is a longitudinal sectional view in a state where the deburring tip is rotated to the use position, and (b) is a longitudinal sectional view in a state where the deburring tip is rotated to the storage position. Front view of the deburring tool

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIGS. 1 to 6, the deburring tool 10 includes an outer cylinder 11 that can be inserted into a perforation 2 formed in a workpiece 1, an axial movement with respect to the outer cylinder 11, and relative rotation. The outer cylinder 11 is rotatably mounted via a pivot pin 14 to an operation shaft 12 that is impossible to fit and a plurality of openings 13 formed at circumferential intervals in the distal end portion of the outer cylinder 11. The deburring tip 15 that can be projected and retracted at the use position protruding outward and the storage position stored in the outer cylinder 11, the operation shaft 12, and the deburring tip 15 are provided, and the operation shaft 12 is operated in the axial direction. Thus, there is provided switching means 16 capable of switching the deburring tip 15 between the use position and the storage position.

  The outer cylinder 11 is composed of a cylindrical member having a smaller diameter than the perforations 2 formed in the workpiece 1, and a through hole 20 is formed in the central portion of the outer cylinder 11 over the entire length. Three slits 21 extending in the axial direction are formed in the distal end portion of the outer cylinder 11 at regular intervals in the circumferential direction, and three leg portions that fit into the distal end side portion of the slit 21 are formed at the distal end portion of the outer cylinder 11. A conical guide member 22 having 22 a is fixed with screws 23. In a state where the guide member 22 is fixed to the distal end portion of the outer cylinder 11, a rectangular hole-shaped opening 13 communicating with the through hole 20 is formed on the base side of the slit 21. Although the number of openings 13 is set to three in the present embodiment, it can be set to an arbitrary number corresponding to the number of deburring tips 15. However, it is preferable to provide a plurality of burrs 3 at regular intervals in the circumferential direction in consideration of the cutting balance when cutting and removing the burrs 3. In addition, although the guide member 22 was provided in order to improve the insertion property of the deburring tool 10 to the piercing | piercing 2, it is not an essential structure and can also be abbreviate | omitted.

  A base through hole 20a having a diameter larger than that of the distal end side is formed on the base end side of the through hole 20 of the outer cylinder 11 via a step portion 24, and the base end side of the base through hole 20a extends in the axial direction 4. A spline groove 20 b is formed, and a snap ring 25 is attached to the base end portion of the through hole 20.

  The operation shaft 12 is fitted into the through hole 20 of the outer cylinder 11. A base end portion of the operation shaft 12 is projected to the outside from the outer cylinder 11 and is a chucking portion 12a that is detachably attached to a chuck of an electric tool (not shown). A large-diameter shaft portion 12b having a larger diameter than the chucking portion 12a is formed in the vicinity of the proximal end of the operation shaft 12, and the movement of the large-diameter shaft portion 12b in the axial direction is different from the stepped portion 24 of the base through-hole 20a. By being restricted by the snap ring 25, the movement range in the axial direction of the operation shaft 12 relative to the outer cylinder 11 is restricted. Four spline ridges 12c that fit into the spline grooves 20b are formed on the base end side of the large-diameter shaft portion 12b. The operation shaft 12 is externally attached by spline fitting between the spline grooves 20b and the spline ridges 12c. The cylinder 11 is fitted so as to be relatively movable in the axial direction but not relatively rotatable.

  Three pivot pins 14 are attached to the distal end portion of the outer cylinder 11 so as to intersect perpendicularly at a fixed distance from the axis of the outer cylinder 11. It is exposed in the center. A substantially rectangular deburring tip 15 is attached to the opening 13, and the deburring tip 15 can freely rotate between a use position shown in FIG. 2A and a storage position shown in FIG. The tip half is protruded outward from the outer peripheral surface of the outer cylinder 11 at the use position so that the burr 3 can be removed by the blade 15a formed on the deburring tip 15. The deburring tip 15 is configured so that substantially the entire deburring tip 15 is disposed on the inner side of the outer peripheral surface of the outer cylinder 11 so that the deburring tool 10 can be smoothly inserted into the perforation 2. In addition, as the deburring tip 15, any other than the rectangular shape can be used as long as the deburring tip 15 can be moved into and out of the use position protruding outside the outer peripheral surface of the outer cylinder 11 and the storage position immersed in the outer peripheral surface of the outer cylinder 11. Shapes can be used.

  The switching means 16 will be described. An annular groove 12d is formed in the vicinity of the distal end of the operation shaft 12, and a pressure receiving portion 12e having the same diameter as that of the intermediate portion is formed at the distal end. The deburring tip 15 has one base end corner portion pivotally supported by the pivot pin 14 and one base end corner portion having a sharp protrusion 15b protruding into the annular groove 12d. A contact portion 15c that contacts the pressure receiving portion 12e at the use position and restricts further rotation of the deburring tip 15 is formed at the base end corner portion. In this switching means 16, the operation shaft 12 is moved relative to the outer cylinder 11 toward the distal end in the axial direction, whereby the protrusion 15b of the deburring tip 15 is pushed by the proximal end surface 12f of the annular groove 12d. As shown in FIG. 3A, the deburring tip 15 is rotated to the storage position, and the operating shaft 12 is moved relative to the outer cylinder 11 toward the proximal end in the axial direction. The protrusion 15b is pushed by the tip end surface 12g of the annular groove 12d, and the deburring tip 15 is rotated about the pivot pin 14 to the use position as shown in FIG. Further, when the burr 3 is removed by cutting, a force is applied to the deburring tip 15 to rotate the deburring tip 15 from the use position to the side opposite to the storage position. Is received when the contact portion 15 c of the deburring tip 15 contacts the pressure receiving portion 12 e of the operation shaft 12. However, as the switching means 16, it is possible to adopt a configuration other than the above as long as the deburring tip 15 can be switched between the storage position and the use position. For example, a rack is provided on the operation shaft 12. Then, a pinion is formed on the deburring tip 15 and the position of the deburring tip 15 can be switched by a rack and pinion mechanism, a protrusion is formed on the operation shaft 12 side, and a recess is formed on the deburring tip 15 side. It is also possible to adopt a configuration in which the deburring tip 15 is configured to be position-switchable.

  A click mechanism 30 is provided in the middle of the deburring tool 10 in the axial direction to hold the deburring tip 15 so that the position can be switched between the storage position and the use position. The click mechanism 30 will be described. A guide groove 31 that is elongated in the axial direction is formed in the middle of the operation shaft 12 over a range of relative movement of the operation shaft 12 with respect to the outer cylinder 11. The holding recesses 32 and 33 are formed corresponding to the position in the axial direction of the operation shaft 12 corresponding to the position. A mounting hole 11a is formed in the outer cylinder 11 so as to correspond to the guide groove 31, and a steel ball 34 that fits in the guide groove 31 and a spring member that biases the steel ball 34 toward the guide groove 31 are formed in the mounting hole 11a. 35 and a plug 36 for retaining the spring member 35 are attached in order from the back side. In the click mechanism 30, when the operation shaft 12 is moved in the axial direction, the steel ball 34 moves along the guide groove 31, and the operation shaft 12 is moved to the outer cylinder 11 as shown in FIGS. When the steel ball 34 is engaged with the holding recess 32 on the base end side, the deburring tip 15 is held at the storage position, and the operation shaft 12 is moved as shown in FIGS. Is moved to the proximal end side of the outer cylinder 11 and the steel ball 34 is engaged with the holding recess 33 on the distal end side, the deburring tip 15 is held in the use position. The operation shaft 12 is held in the axial direction against the urging force of the spring member 35 while the operation shaft 12 is held at a position corresponding to the storage position or the use position of the deburring tip 15. The operation ball 12 can be moved in the axial direction by detaching the steel ball 34 from the recesses 32 and 33.

  The burr 3 removal method using the deburring tool 10 will be described. First, the chucking portion 12a is fixedly held on the chuck of the electric tool. Next, as shown in FIG. 2A, the operating shaft 12 is moved relative to the distal end side of the outer cylinder 11 to move the deburring tip 15 to the storage position, and the deburring tool 10 is processed in this state. Insert into the perforation 2 of the object 1. At this time, the steel ball 34 of the click mechanism 30 is engaged with the holding recess 32 of the guide groove 31 to restrict the movement of the operation shaft 12, the deburring tip 15 is held at the storage position, and the deburring tip 15 is Since the movement to the use position side is restricted by its own weight, the deburring tool 10 can be smoothly inserted into the hole 2.

  Next, with the deburring tool 10 inserted into the perforation 2, as shown in FIG. 2 (b), the operation shaft 12 is relatively moved toward the base end side of the outer cylinder 11, and the deburring tip 15 is used. Turn to. In this state, the steel ball 34 of the click mechanism 30 engages with the holding recess 33 of the guide groove 31, so that the movement of the operation shaft 12 is restricted and the deburring tip 15 is held at the use position. Then, in a state where the deburring tip 15 is held at the use position, the workpiece 1 is moved by the blade portion 15a of the deburring tip 15 by moving the deburring tool 10 in the pulling direction while rotating the deburring tool 10 with an electric tool. The burr 3 formed at the lip of the perforation 2 on the back surface side of the hole is removed. Thus, by moving the deburring tool 10 rearward, the burr 3 formed along the lip of the perforation 2 can be removed, so that the burr 3 is removed using a spherical grindstone or the like as in the prior art. Compared to the case, it is possible to remove the burrs 3 neatly with a simple operation and in a short time.

  In this way, after removing the burr 3, the deburring tool 10 is stopped, and the operation shaft 12 is moved relative to the distal end side of the outer cylinder 11 as shown in FIG. The deburring tool 10 is extracted from the perforation 2 of the workpiece 1 in the state of being moved to. Further, when removing the burrs 3 of the plurality of perforations 2, the above operation is repeated, and the burrs 3 of the plurality of perforations 2 are sequentially removed.

  In addition, the positioning means 40 having the following configuration can be provided for the deburring device 3. As shown in FIG. 7, the positioning means 40 includes a position adjustment ring 41 that is attached to the outer cylinder 11 so as to be movable in the axial direction, and fixes the position adjustment ring 41 to a desired axial position of the outer cylinder 11. The fixing screw 42 to be mounted, the bearing 43 which is externally mounted on the distal end side of the outer cylinder 11 with respect to the position adjustment ring 41, and the end of the perforation 2 are fitted and positioned concentrically with the perforation 2. A positioning member 44 that is rotatably fitted to the outer cylinder 11 via a bearing 43, and a positioning member 44 that is provided between the position adjustment ring 41 and the positioning member 44. A compression spring 45 that is biased toward the distal end side, and a thrust bearing 46 interposed between the compression spring 45 and the positioning member 44 are provided.

  In the deburring tool 10 provided with the positioning means 40, as shown in FIG. 7A, the deburring tool 10 is held in the state where the deburring tip 15 is held in the storage position as described above. Then, as shown in FIG. 7B, the deburring tip 15 is rotated to the use position. In this state, the position adjusting ring 41 is moved to the distal end side of the outer cylinder 11, and the positioning member 44 is moved to the distal end side of the outer cylinder 11 until the compression spring 45 is compressed by a certain amount, and the conical portion 44 a is fitted to the front edge of the hole 2. The position adjusting ring 41 is moved toward the distal end side of the outer cylinder 11 until the workpiece 1 is clamped between the conical portion 44a and the deburring tip 15 by the urging force of the compression spring 45, and then the fixing screw 42 is used. The position adjustment ring 41 is fixed to the outer cylinder 11.

  After the positioning means 40 is attached to the deburring tool 10 in this way, the outer cylinder 11 is pushed into the back side of the perforation 2 against the urging force of the compression spring 45 to separate the deburring tip 15 from the workpiece 1. In this state, the deburring tool 10 is rotated by the electric tool, and the burrs 3 are removed while the outer cylinder 11 is moved in the pulling direction by the urging force of the compression spring 45. At this time, since the base side of the deburring tool 10 is positioned concentrically with the perforation 2 by the conical portion 44a of the positioning member 44, the burr 3 can be removed smoothly. Further, when removing the deburring tool 10 from the perforation 2, the deburring tool 10 is moved to the back side of the perforation 2 against the biasing force of the compression spring 45, and then the deburring tip 15 is moved to the storage position. When removing the burrs 3 of the perforations 2 formed on the workpiece 1 having different thicknesses in the next deburring operation, the mounting position of the positioning means 40 is adjusted in the same manner as described above. However, when removing the burr 3 of the perforation 2 formed in the workpiece 1 having the same thickness, the position of the position adjustment ring 41 is not adjusted, and the conical portion 44a and the burr 3 are the same as described above. The workpiece 1 can be held between the take-up chips 15 by the urging force of the compression spring 45, and the burr 3 can be removed. That is, once the attachment position of the positioning means 40 is adjusted, the burr 3 on the back surface side of the hole 2 can be removed while the deburring tool 10 is sequentially positioned with respect to the plurality of holes 2.

(Second embodiment)
As shown in FIGS. 8 to 10, the deburring tool 50 is internally fitted to an outer cylinder 51 that can be inserted into the perforation 2 formed in the workpiece 1, and to be movable in the axial direction with respect to the outer cylinder 51. The operation shaft 52, the operation means 53 for operating the operation shaft 52 in the axial direction with respect to the outer cylinder 51, and a plurality of openings 54 formed at the distal end portion of the outer cylinder 51 at intervals in the circumferential direction. A deburring tip 56 that is rotatably mounted via a support pin 55 and can protrude and retract to a use position protruding out of the outer cylinder 51 and a storage position stored in the outer cylinder 51, an operation shaft 52, and a burr. The deburring tip 56 is provided with switching means 57 that can switch the deburring tip 56 between the use position and the storage position by operating the operation shaft 52 in the axial direction.

  The outer cylinder 51 is composed of a cylindrical member having a smaller diameter than the perforations 2 formed in the workpiece 1, and a through hole 60 is formed in the central portion of the outer cylinder 51 over the entire length. Three slits 61 extending in the axial direction are formed at regular intervals in the distal end portion of the outer cylinder 51, and a disk-shaped cover member 62 is fixed to the distal end portion of the outer cylinder 51 with screws 63. Yes. In a state where the cover member 62 is fixed to the distal end portion of the outer cylinder 51, a rectangular hole-shaped opening 54 that communicates with the through hole 60 is formed by the slit 61. Although the number of openings 54 is set to three in the present embodiment, it can be set to an arbitrary number corresponding to the number of deburring tips 56. However, it is preferable to provide a plurality of burrs at regular intervals in the circumferential direction in consideration of the cutting balance when cutting and removing burrs. The cover member 62 can be sharply configured as in the case of the guide member 22 of the first embodiment, or can be omitted.

  A screw hole 64 is formed on the base side of the through hole 60 of the outer cylinder 51, and a plug 65 is fastened and fixed to the base end portion of the screw hole 64 at a screw portion 65a. The plug 65 is provided with a chucking portion 65b protruding outward coaxially with the outer cylinder 51. The chucking portion 65b is sandwiched by a chuck of an electric tool (not shown) so that the outer cylinder 51 can be rotated. It is configured.

  A ring-shaped operation member 66 is externally fitted in the vicinity of the rear end of the outer cylinder 51 so as to be movable in the axial direction, and a pair of guide slits 70 elongated in the axial direction are formed in the vicinity of the rear end of the outer cylinder 51. An insertion hole 52a is formed in the base end portion of the operation shaft 52 in a direction orthogonal to the axial center, and a connection pin 67 connected to the operation member 66 through the guide slit 70 is attached to the insertion hole 52a. The operation shaft 52 is attached to the outer cylinder 51 through a guide slit 70 and a connecting pin 67 so as to be movable in the axial direction by a predetermined length and not to be relatively rotatable.

  A flange portion 52 b is formed in the middle of the operation shaft 52, and a ring-shaped screw member 68 through which the middle portion of the operation shaft 52 is inserted is attached to the back of the screw hole 64, and between the flange portion 52 b and the screw member 68. Is provided with a spring member 69 that constantly urges the operation shaft 52 toward the distal end side with respect to the outer cylinder 51.

  Three pivot pins 55 are attached to the distal end portion of the outer cylinder 51 so as to intersect at right angles with a certain distance from the axis of the outer cylinder 51. It is exposed in the center. A substantially rectangular deburring tip 56 is attached to the opening 54, and the deburring tip 56 is rotatable between a use position shown in FIG. 9A and a storage position shown in FIG. 9B. It is pivotally supported by the pivot pin 55, and its tip half is projected outward from the outer peripheral surface of the outer cylinder 51 at the use position, and the burr 3 can be removed by the blade 56 a formed on the deburring tip 56. In the storage position, substantially the entire deburring tip 56 is arranged on the inner side of the outer peripheral surface of the outer cylinder 51 so that the deburring tool 50 can be smoothly inserted into the perforation 2. The deburring tip 56 may be any other shape than a rectangle as long as it can be moved into and out of the use position protruding out of the outer peripheral surface of the outer cylinder 51 and the storage position immersed in the outer peripheral surface of the outer cylinder 51. A shape can be adopted.

  The switching means 57 will be described. An annular groove 52 c is formed in the vicinity of the distal end of the operation shaft 52, and a slightly large diameter switching portion 52 d is formed in the distal end portion of the operation shaft 52. One base end corner of the deburring tip 56 is pivotally supported by a pivot pin 55, and a projection 56b is formed on the one base end corner. In this switching means 57, the operating shaft 52 and the operating shaft 52 are moved relative to the distal end side in the axial direction of the outer cylinder 51 by the urging force of the spring member 69, so that the protrusion 56 b of the deburring tip 56 is based on the annular groove 52 c. As shown in FIG. 9A, the deburring tip 56 is rotated to the use position with the pivot pin 55 as the center, and the operation shaft 52 is moved together with the operation member 66 to the spring member 69. 9B, the protrusion 56b of the deburring tip 56 is pushed by the front end side end surface 52f of the annular groove 52c, and is moved relative to the axial base end side of the outer cylinder 51 against the urging force of FIG. ), The deburring tip 56 rotates to the storage position around the pivot pin 55. Further, when removing the burr 3, a force is applied to the deburring tip 56 to further rotate the deburring tip 56 from the use position to the side opposite to the storage position. The base end surface of the deburring tip 56 is received by contacting the outer peripheral surface of the operation shaft 52. However, as the switching means 57, a configuration other than those described above can be adopted as long as the deburring tip 56 can be switched between the storage position and the use position. The deburring tip 56 is formed, a pinion is formed, and the position of the deburring tip 56 can be switched by a rack and pinion mechanism, a projection 56b is formed on the operation shaft 52 side, and a recess is formed on the deburring tip 56 side. It is also possible to adopt a configuration in which the deburring tip 56 is configured to be position-switchable.

  The deburring method using the deburring tool 50 will be described. First, the chucking portion 65b is fixedly held on the chuck of the electric tool. Next, as shown in FIG. 9B, the operation member 66 is operated, and the operation shaft 52 is moved relative to the proximal end side of the outer cylinder 51 against the urging force of the spring member 69, and the deburring tip is moved. The deburring tool 50 is inserted into the perforation 2 of the workpiece 1 with the 56 being moved to the storage position. As described above, since the operation member 66 is operated to hold the deburring tip 56 in the storage position, the deburring tip 56 is restricted from moving to the use position side by its own weight. Can be smoothly inserted into the perforations 2.

  Next, with the deburring tool 50 inserted into the perforation 2, the hand is released from the operating member 66, and the operating shaft 52 is moved by the urging force of the spring member 69 as shown in FIG. The deburring tip 56 is rotated to the use position. Then, with the deburring tip 56 held in the use position, the deburring tool 50 is moved in the pulling direction while rotating the deburring tool 50 with the electric tool, so that the blade portion 56a of the deburring tip 56 The burr 3 formed on the rim of the perforation 2 on the back side of the workpiece 1 is removed. In this way, by moving the deburring tool 50 in the extraction direction, the burr 3 formed along the edge of the perforation 2 can be removed, so the burr 3 is removed using a spherical grindstone or the like as in the past. Compared with the case where it does, it becomes possible to remove the burr | flash 3 neatly by simple operation and also in a short time.

  After removing the burr 3 in this way, the deburring tool 50 is stopped, and the operation shaft 52 is moved relative to the proximal end side of the outer cylinder 51 by the operation member 66 as shown in FIG. The deburring tool 50 is extracted from the perforation 2 of the workpiece 1 in a state where the cutting tip 56 is moved to the storage position. Further, when removing the burrs 3 of the plurality of perforations 2, the above operation is repeated, and the burrs 3 of the plurality of perforations 2 are sequentially removed. The deburring tool 50 of the second embodiment can be provided with the positioning means 40 similar to that of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Workpiece 2 Drilling 3 Deburring 10 Deburring tool 11 Outer cylinder 11a Mounting hole 12 Operation shaft 12a Chucking part 12b Large diameter shaft part 12c Spline protrusion 12d Annular groove 12e Pressure receiving part 12f Base end side end face 12g Tip end side end face 13 Opening portion 14 Pivoting pin 15 Deburring tip 15a Blade portion 15b Protrusion 15c Contacting portion 16 Switching means 20 Through hole 20a Base through hole 20b Spline groove 21 Slit 22 Guide member 22a Leg portion 23 Screw 24 Stepped portion 25 Snap ring 30 Click Mechanism 31 Guide groove 32 Holding recess 33 Holding recess 34 Steel ball 35 Spring member 36 Plug 40 Positioning means 41 Position adjusting ring 42 Fixing screw 43 Bearing 44 Positioning member 44a Conical portion 45 Compression spring 46 Thrust bearing 50 Deburring tool 51 Outer cylinder 52 Operation axis 52 a insertion hole 52b flange 52c annular groove 52d switching part 52e proximal end face 52f distal end face 53 operating means 54 opening 55 pivot pin 56 deburring tip 56a blade part 56b protrusion 57 switching means 60 through hole 61 slit 62 cover Member 63 Screw 64 Screw hole 65 Plug 65a Screw part 65b Chucking part 66 Operation member 67 Connecting pin 68 Screw member 69 Spring member 70 Guide slit

Claims (7)

A deburring tool that removes from the front side burrs generated during drilling of the workpiece,
An outer cylinder that can be inserted into the perforation;
An operating shaft that is axially movable with respect to the outer cylinder and is fitted so as not to be relatively rotatable.
A plurality of openings formed circumferentially spaced at the distal end of the outer cylinder are pivotally mounted via pivot pins, and are used to protrude out of the outer cylinder, and stored in the outer cylinder. A deburring tip that can appear in the storage position
Switching means provided on the operating shaft and the deburring tip, and capable of switching the deburring tip between the use position and the storage position by an operation in the axial direction of the operating shaft;
A deburring tool characterized by comprising:   2. The deburring tool according to claim 1, wherein an annular groove is formed in the vicinity of the distal end of the operation shaft as the switching means, and a protrusion to be inserted into the annular groove is formed at the proximal end portion of the deburring tip.   One of the base end corners of the deburring tip is pivotally supported by the pivot pin, and the deburring tip is held at the use position on the other base end corner of the deburring tip. The deburring tool according to claim 1, wherein a contact portion that contacts the surface is formed.   The deburring tool according to any one of claims 1 to 3, further comprising a click mechanism that restricts movement of the operation shaft relative to the outer cylinder and holds the deburring tip between a use position and a storage position so as to be switchable. .   The deburring tool according to any one of claims 1 to 4, further comprising a positioning unit that is fitted to a rim of a perforation on the surface side of the workpiece and rotatably positions the base side of the outer cylinder in the perforation. .   The deburring tool according to any one of claims 1 to 5, wherein a chucking portion that protrudes outward from an outer cylinder and is detachably held by a chuck of an electric motor is formed at a base end portion of the operation shaft. The deburring tool of any one of Claims 1-6 which attached the conical guide member to the front-end | tip part of the said outer cylinder.

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