JP2013220515A - Work tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved technique concerning an element that is operated to hold a tip end tool.SOLUTION: An electrically powered vibration tool 100 includes a spindle 120 and a clamp shaft 123, and is configured to drive a blade 200 that is clamped between a flange 122 and a clamp head 124. The electrically powered vibration tool 100 includes a clamp shaft holding member 131 that is engaged with the clamp shaft 123 to hold the clamp shaft 123 and a lever section 151 that moves the clamp shaft holding member 131 to the clamp shaft 123. The lever section 151 includes a coil spring 156 and a movable pin 157 that can be moved by being pressed by the coil spring 156. The movable pin 157 is engaged with a body housing 101 at a storage position of the lever section 151.

Description

  The present invention relates to a work tool for driving a tip tool.

  WO 2005/102605 describes a work tool for driving a tool sandwiched between a work spindle and a fastening element. The work tool is configured to be slidable between a clamping position where the fastening element clamps the tool with respect to the work spindle and an open position where the tool is removed from the work spindle. In the clamping position, a stop assembly provided inside the working spindle clamps the clamping shaft of the fastening element. In other words, a clamping assembly provided inside the work spindle holds the fastening element by a clamping force provided by a spring element provided inside the work spindle. Thereby, the tool is clamped between the working spindle and the fastening element. This stop assembly releases the clamping element clamping via axial displacement of the thrust member by manipulating the cock lever.

WO2005 / 102605 gazette

  In the work tool described in WO 2005/102605, the cock lever is not engaged with the thrust pin after the clamp shaft of the fastening element is clamped by the stop assembly. For this reason, when the work tool is operated, the cock lever is moved, and there is a possibility that the machining work on the workpiece is hindered. Then, an object of this invention is to provide the improvement technique regarding the element operated in order to hold | maintain a tip tool in a working tool in view of the above.

  In order to solve the above problems, according to a preferred embodiment of the work tool according to the present invention, a first shaft having a first clamp portion and a second clamp portion and having a first movable relative to the first shaft are provided. A work tool having two shafts and driving a tip tool sandwiched between the first clamp part and the second clamp part is configured. The work tool includes a holding member that engages with the second shaft and holds the second shaft, and an operation member that moves the holding member relative to the second shaft. The operating member is provided with an elastic member and an engaging member that is movable by being urged by the elastic member. The engaging member is configured to engage with the work tool main body at the operation member storage position.

  According to the present invention, since the engaging member is engaged with the work tool main body, the operation member is reliably held at the storage position when the workpiece is processed by the work tool. In the present invention, typically, the operating member may be held in the storage position by pressing the engaging member against the work tool body by the biasing force of the biasing member, while the engaging member is engaged with the engaging member. For example, a recess or the like may be provided in the work tool main body, and the operation member may be held at the storage position by engagement between the engagement member and the recess.

  According to the further form of the working tool which concerns on this invention, the elastic member is accommodated in the inside of an operation member.

  According to this form, since the elastic member is accommodated in the inside of the operation member, it can suppress that an elastic member obstructs operation, when operating an operation member.

  According to the further form of the work tool which concerns on this invention, an operation member is the structure extended in a predetermined direction from the fulcrum where the said operation member is supported. The elastic member is configured to urge the engaging member along the predetermined direction.

  According to this embodiment, since the engaging member is urged by the elastic member in the direction extending from the fulcrum of the operation member, even when the operation member moves around the fulcrum, the engagement member is reliably The work tool body can be reliably engaged.

  On the other hand, according to another preferable embodiment of the work tool according to the present invention, the second shaft has a first shaft having a first clamp portion and a second clamp portion and is relatively movable with respect to the first shaft. A work tool having a shaft and driving a tip tool sandwiched between the first clamp portion and the second clamp portion is configured. The work tool includes a holding member that engages with the second shaft and holds the second shaft, and an operation member that moves the holding member relative to the second shaft. The operation member is configured to be movable in a plurality of directions, and is configured to be disposed at a storage position where the operation member is stored by movement in at least one of the plurality of directions. The operation member is configured to engage with the work tool main body at the operation member storage position.

  According to the present invention, even in a work tool in which the operation member can move in a plurality of directions, the operation member can be engaged with the work tool main body at the storage position. The operation member may be configured to engage with the work tool main body corresponding to each movement in a plurality of directions.

  According to the further form of the working tool which concerns on this invention, a holding member contains the screwing member screwed together with a 1st shaft or a 2nd shaft as a component. The operation member is configured to rotate the screwing member.

  According to this embodiment, since the operation member is configured to rotate the screwing member, a movement for engaging with the screwing member and a movement for rotating the screwing member are required. That is, even if the operation member is configured to move in a plurality of directions, the operation member can be held by the work direction main body at the storage position.

  According to the further form of the working tool which concerns on this invention, a screwing member is the structure which screws and engages with a 2nd shaft and hold | maintains a 2nd shaft.

  According to this embodiment, since the screwing member and the second shaft are directly screwed together, the second shaft can be reliably held by the screwing member.

  According to the further form of the working tool which concerns on this invention, the screwing member is comprised as a color | collar screwed together with the 1st shaft. The work tool includes a movable member that is engaged with the collar and holds the second shaft. When the collar rotates with respect to the first shaft, the movable member moves in the radial direction of the second shaft by the movement of the collar in the long axis direction of the first shaft so as to hold the second shaft. It is configured.

  According to this embodiment, the movable member is moved in the radial direction of the second shaft by screwing the collar and the first shaft. That is, since the configuration in which the movement of the collar in the major axis direction of the first shaft is converted into the movement of the movable member in the radial direction of the second shaft is achieved by screwing the collar and the first shaft, Thus, a large holding force can be obtained with respect to the force for holding the second shaft.

  ADVANTAGE OF THE INVENTION According to this invention, the improvement technique regarding the element operated in order to hold | maintain a tip tool in a working tool can be provided.

It is a perspective view showing the whole electric vibration tool composition concerning a 1st embodiment of the present invention. It is sectional drawing which shows the whole structure of the electrically driven vibration tool which concerns on 1st Embodiment of this invention. FIG. 3 is a partially enlarged view of FIG. 2. It is sectional drawing in the IV-IV line of FIG. It is sectional drawing in the VV line of FIG. It is sectional drawing of the clamp shaft holding member in the VI-VI line of FIG. It is sectional drawing which shows the state which made the lever part of FIG. 2 turn around a turning axis. It is sectional drawing which shows the state which turned the lever part of FIG. 7 around the spindle. It is a top view of an electric vibration tool. FIG. 10 is a top view showing a state where the lever portion of FIG. 9 is turned around the spindle. It is sectional drawing which shows the whole structure of the electrically driven vibration tool which concerns on 2nd Embodiment of this invention. It is the elements on larger scale of FIG. It is the elements on larger scale of FIG. It is a perspective view which shows a clamp member. It is a fragmentary sectional view in the XV-XV line | wire of FIG. It is a fragmentary sectional view in the XVI-XVI line of FIG. FIG. 13 is a cross-sectional view showing a state where the lever portion of FIG. 12 is turned around a turning axis. It is sectional drawing which shows the state which turned the lever part of FIG. 17 around the spindle. It is a fragmentary sectional view of the electric vibration tool which concerns on 3rd Embodiment of this invention. It is sectional drawing in the XX-XX line of FIG. It is a disassembled perspective view of a clamp shaft holding mechanism. It is sectional drawing which shows the state which turned the cam lever mechanism in FIG.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. The present embodiment is an example in which the present invention is applied to an electric vibration tool as a work tool.

  As shown in FIG. 1, the electric vibration tool 100 selectively attaches a plurality of types of tools such as a blade and a polishing pad, and vibrates the attached tool so that the tool is applied to a workpiece. It is a work tool that performs processing such as cutting and polishing according to the type. In the present embodiment, description will be made using a blade 200 as an example of a tool. The tool such as the blade 200 is an implementation configuration example corresponding to the “tip tool” in the present invention.

  As shown in FIGS. 1 and 2, the electric vibration tool 100 is mainly configured by a main body housing 101 in which a drive mechanism 102 and a rotation control mechanism 104 are accommodated, a tool holding mechanism 103 for holding a blade 200, and the like. ing. This main body housing 101 is an implementation structural example corresponding to the "work tool main body" in this invention.

  As shown in FIG. 4, the drive mechanism 102 is mainly composed of a motor 110, an eccentric shaft 112, a bearing 113, a driven arm 114, a spindle connecting portion 115, and the like. The eccentric shaft 112 is disposed at the tip of the output shaft 111 of the motor 110 and at a position eccentric to the rotation shaft of the output shaft 111 so as to extend in a direction parallel to the rotation shaft. The bearing 113 is attached to the outside of the eccentric shaft 112. As shown in FIG. 4, the driven arm 114 is composed of two arm portions 114 a extending from the spindle connection portion 115 toward the motor 110. The driven arm 114 is disposed so that the two arm portions 114 a come into contact with the bearing 113 at two opposite positions outside the bearing 113.

  As shown in FIGS. 3 and 5, the tool holding mechanism 103 is a mechanism that holds the blade 200 and transmits the output of the motor 110 to the blade 200 to vibrate the blade 200. The tool holding mechanism 103 is mainly composed of a spindle 120, a clamp shaft 123, a clamp shaft holding mechanism 130, and the like.

  As shown in FIG. 3, the spindle 120 is a hollow cylindrical member, and is arranged so that the major axis direction extends in a direction intersecting the output shaft 111 of the motor 110. The spindle 120 is supported by the main body housing 101 via bearings 125 and 126 so as to be rotatable around the long axis direction at two locations in the long axis direction. A spindle extension member 121 is attached to the tip of the spindle 120. A disc-shaped flange 122 is attached to the tip of the spindle extension member 121. The spindle 120 is an implementation configuration example corresponding to the “first shaft” in the present invention.

  The clamp shaft 123 is a substantially columnar member, has a clamp head 124 formed integrally at one end portion, and has a screw portion 125 on the other end portion side. The screw portion 125 is formed with a male screw. The clamp shaft 123 can be inserted into the spindle 120 and is detachable from the spindle 120. This clamp shaft 123 is an implementation structural example corresponding to the "second shaft" in the present invention.

  The spindle 120, the spindle extension member 121, the flange 122, and the clamp shaft 123 configured as described above can hold the blade 200 between the clamp head 124 and the flange 122 facing the clamp head 124.

  As shown in FIG. 3, the clamp shaft holding mechanism 130 is a mechanism that holds the clamp shaft 123 by screwing with the clamp shaft 123. The clamp shaft holding mechanism 130 is mainly composed of a clamp shaft holding member 131 and an O-ring 132. The clamp shaft holding member 131 is a hollow substantially cylindrical member.

  As shown in FIG. 6, the hollow portion of the clamp shaft holding member 131 is provided with a screw portion 133 that is screwed with the screw portion 125 of the clamp shaft 123. An internal thread is formed on the threaded portion 133. As shown in FIGS. 3 and 5, the clamp shaft holding member 131 is formed with a groove portion 134 that engages with the engaging member 141. Further, the clamp shaft holding member 131 is formed with a protruding portion 135 protruding in the radial direction. The clamp shaft holding member 130 is disposed inside the spindle 120, and the protruding portion 135 is disposed on the spindle 120 and the spindle extension member 121. As a result, the clamp shaft holding member 131 is rotatable relative to the spindle 120 and the spindle extension member 121 in the circumferential direction. An O-ring 132 is disposed on the outer periphery of the clamp shaft holding member 131. When the clamp shaft holding member 131 rotates in the circumferential direction, a frictional resistance is generated between the inner wall of the spindle 120. Yes. This clamp shaft holding member 131 is an implementation configuration example corresponding to the “screw member” in the present invention.

  As shown in FIGS. 3 and 5, the rotation control mechanism 104 is a mechanism that controls the relative rotation of the clamp shaft holding member 131 with respect to the spindle 120. The rotation control mechanism 104 is mainly composed of a thrust pin 140, an engaging portion 141, a connecting portion 142, a coil spring 143, a cam lever mechanism 150, and the like.

  The thrust pin 140 is disposed inside the spindle 120, is slidable in the major axis direction, and is rotatable in the circumferential direction of the spindle 120. The engaging portion 141 can be engaged with the groove portion 134 of the clamp shaft holding member 131 and is disposed at the distal end portion of the thrust pin 140. The connecting portion 142 is a disk-like member that protrudes from the thrust pin 140 in the intersecting direction, and is disposed between the thrust pin 140 and the engaging portion 141. The thrust pin 140 and the engaging portion 141 are coupled via a connecting portion 142, and can integrally slide inside the spindle 120 in the major axis direction and can turn in the circumferential direction of the spindle 120. It is configured. An end portion of the thrust pin 140 opposite to the engaging portion 141 is formed in a curved surface shape. Further, an O-ring 144 is disposed on the thrust pin 140. The O-ring 144 is disposed so as to contact the inner wall of the spindle 120, and blocks dust that passes between the thrust pin 140 and the spindle 120 from the outside and enters the inside of the spindle 120. The coil spring 143 is disposed inside the spindle 120, and one end is in contact with the connecting portion 142 and the other end is in contact with the spindle 120. Thus, the coil spring 143 biases the thrust pin 140, the engaging portion 141, and the connecting portion 142 in the spindle 120 in the direction in which the clamp shaft holding member 131 is disposed.

  As shown in FIGS. 3 and 5, the cam lever mechanism 150 is a member that slides the thrust pin 140 in the major axis direction. The cam lever mechanism 150 is mainly composed of a lever portion 151, a turning shaft 153, and a rotating member 154. The cam lever mechanism 150 is configured such that the lever portion 151 can turn in the circumferential direction of the turning shaft 153 and can turn in the circumferential direction of the spindle 120. This lever part 151 is the implementation structural example corresponding to the "operation member" in this invention.

  The lever part 151 has an eccentric part 152. A hole through which the turning shaft 153 passes is formed in the eccentric portion 152. The turning shaft 153 is inserted through the eccentric portion 152 and is held so as to be movable in the major axis direction of the spindle 120 with respect to the rotating member 154. Thereby, the lever part 151 can be turned in the circumferential direction of the turning shaft 153. The center portion of the eccentric portion 152 is arranged eccentrically with respect to the axis center of the turning shaft 153 so that the distance from the shaft center of the turning shaft 153 is different at each position on the outer periphery of the eccentric portion 152. It is configured.

  Further, as shown in FIG. 3, the lever portion 151 has a through hole 151 a formed along the longitudinal direction of the lever portion 151. A stepped portion 151b is formed in the through hole 151a. The coil spring 156 and the movable pin 157 have a through-hole 151 a accommodated therein, whereby the coil spring 156 and the movable pin 157 are arranged along the long axis direction of the lever portion 151. The movable pin 157 is formed with a protruding portion 157 a that protrudes in a direction intersecting the major axis direction of the movable pin 157. The protruding portion 157a is configured to contact the stepped portion 151b of the lever portion 151. The coil spring 156 has one end in contact with the thrust pin 140 and the other end in contact with the protruding portion 157 a of the movable pin 157. As a result, the coil spring 156 biases the movable pin 157. In other words, the coil spring 156 biases the movable pin 157 along the long axis direction of the lever portion 151 extending from the turning shaft 153 that is a fulcrum of the lever portion 151.

  The movable pin 157 has a curved tip at the end opposite to the side where the coil spring 156 is disposed. Further, the movable pin 157 is biased by the coil spring 156 so that the tip portion protrudes from the lever portion 151, and the tip portion is pressed against the biasing force of the coil spring 156 so that the movable pin 157 enters the lever portion 151. Has been. The movable pin 157 is configured so that the movable pin 157 does not fall out of the lever portion 151 when the protruding portion 157 a abuts on the stepped portion 151 b of the lever portion 151.

  As shown in FIG. 7, the main body housing 101 is formed with an engaging recess 101 a that engages with the movable pin 157. As shown in FIG. 3, the movable pin 157 engages with the engagement recess 101 a, and the lever portion 151 is fixed to the main body housing 101. The position of the lever portion 151 shown in FIG. 3 is an implementation configuration example corresponding to the “operating member storage position” in the present invention.

  As shown in FIG. 5, the rotating member 154 is attached to the main body housing 101 via an O-ring 155 so as to be rotatable in the circumferential direction of the spindle 120. The rotating member 154 includes a turning portion 154a having a substantially circular cross section, and two support portions 154b extending from the turning portion 154a in the long axis direction of the spindle 120. A pivot shaft 153 is held between the two support portions 154b. In addition, the lever member 151 is configured to be rotatable in the circumferential direction of the spindle 120 by the rotation of the rotating member 154 in the circumferential direction of the spindle 120.

  As shown in FIGS. 9 and 10, the lever portion 151 is configured to be turnable in the circumferential direction of the spindle 120, and is turnable in the circumferential direction of the turning shaft 153 as shown in FIGS. 3 and 7. It is configured. At this time, since the tip end portion of the thrust pin 140 is formed in a curved surface shape, the coil spring 156 smoothly slides on the surface of the thrust pin 140 when the lever portion 151 is turned. That is, the tip portion of the thrust pin 140 is configured so that the coil spring 156 smoothly slides on the surface of the thrust pin 140 regardless of whether the lever portion 151 is swung in the circumferential direction of the spindle 120 or the swiveling shaft 153. It is formed in a curved shape with respect to the direction. Thereby, the lever part 151 is comprised so that turning in a some direction is possible.

  Further, since the distal end portion of the movable pin 157 is formed in a curved shape, when the lever portion 151 is turned, the distal end portion comes into contact with the main body housing 101, so that the movable pin 157 enters the lever portion 151. . The distal end portion of the movable pin 157 is formed in a curved shape with respect to the respective directions of the circumferential direction of the spindle 120 and the circumferential direction of the turning shaft 153 that are turning directions of the lever portion 151. Thereby, by turning the lever part 151, the movable pin 157 can be engaged with the engaging recess 101a, or the engagement can be released. In other words, the movable pin 157 can be engaged with or released from the engaging recess 101a even if the lever 151 is turned in any of a plurality of directions.

  The rotation control mechanism 104 configured as described above turns the thrust pin 140 to the long axis by turning the lever portion 151 in the circumferential direction of the turning shaft 153 between the position shown in FIG. 3 and the position shown in FIG. Can be moved in the direction. By moving the thrust pin 140, the engaging portion 141 can be engaged with the groove portion 134 of the clamp shaft holding member 131. Since the clamp shaft holding member 131 is rotatable with respect to the spindle 120, depending on the position of the groove portion 134, if the lever portion 151 is simply turned in the circumferential direction of the turning shaft 153, The groove part 134 may not engage. When the engaging portion 141 and the groove portion 134 are not engaged, the engaging portion 141 and the groove portion 134 can be engaged by turning the lever portion 151 in the circumferential direction of the spindle 120 as shown in FIG. it can.

  When attaching and detaching the blade 200, the lever 151 is pivoted in the circumferential direction of the spindle 120 with the engaging member 141 and the groove 132 engaged, so that the clamp shaft holding member 131 in the circumferential direction of the spindle 120 is rotated. Control the rotation.

  Specifically, the clamp shaft 123 and the clamp shaft holding member 131 are screwed together or screwed by turning the lever portion 151 in the circumferential direction of the spindle 120 with the clamp shaft 123 being held unrotatable. Can be released. The blade 200 can be attached and detached by removing the clamp shaft 123 from the clamp shaft holding member 130. Further, the clamp shaft 123 is screwed and held to the clamp shaft holding member 131, whereby the blade 200 is sandwiched between the flange 122 and the clamp head 124. This clamp shaft holding member 131 is an implementation configuration example corresponding to the “holding member” in the present invention.

  According to the first embodiment described above, since the clamp shaft holding member 131 is configured to be screwed directly with the clamp shaft 123, the clamp shaft 123 can be reliably held by the clamp shaft holding member 131.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 11, the second embodiment is different from the first embodiment in the tool holding mechanism 203. As shown in FIG. 12, the tool holding mechanism 203 is configured such that the screwing member 231 of the clamp shaft holding mechanism 230 is screwed with the spindle 220. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 12, a first stepped portion 220a and a second stepped portion 220b are formed inside the spindle 220. Further, a screw thread 220 c that is screwed with the screwing member 231 is formed inside the spindle 220. A guide member 221 is attached to the tip of the spindle 220. As shown in FIG. 13, the guide member 221 is a substantially cylindrical member that is engaged and fixed to the outside of the spindle 220. In addition, a disk-shaped flange 222 is attached to the guide member 221. The spindle 220, the guide member 221 and the flange 222 are an implementation configuration example corresponding to the “first shaft” in the present invention.

  As shown in FIG. 13, the clamp shaft 223 has a clamp head 224 that is integrally formed at the end of a substantially cylindrical shaft. The clamp shaft 223 can be inserted into the spindle 220 via the guide member 221 and can be attached to and detached from the spindle 220. The other end of the clamp shaft 223 is formed in a spherical shape. The clamp shaft 223 is an implementation configuration example corresponding to the “second shaft” in the present invention.

  The tool holding mechanism 203 can hold the blade 200 between the flange 222 and the clamp head 224. The flange 222 and the clamp head 224 are implementation configuration examples corresponding to the “first clamp portion” and the “second clamp portion” in the present invention, respectively.

  As shown in FIG. 13, the clamp shaft holding mechanism 230 is a mechanism that holds the clamp shaft 223. The clamp shaft holding mechanism 230 is mainly composed of a screwing member 231, a clamp member 232, and a rotational force transmission member 233.

  As shown in FIG. 13, the screwing member 231 is a substantially cylindrical member, and is disposed inside the spindle 220. On the outer peripheral surface of the screw member 231, a screw thread 231 a that is screwed with the screw thread 220 c of the spindle 220 is formed. Thereby, the screwing member 231 is configured to be movable in the long axis direction of the spindle 220 by being screwed and rotated with respect to the spindle 220.

  As shown in FIG. 15, the screwing member 231 has a clamp shaft insertion hole 234 into which the clamp shaft 223 is inserted in the center region. Furthermore, the screwing member 231 has a clamp member holding portion 235 connected to the clamp shaft insertion hole 234. The clamp member holding portion 235 is formed in a concave shape with respect to the clamp shaft insertion hole 234. The clamp member holding portion 235 is provided with engagement recesses 235a that engage with the projections 232b of the clamp member 232 at two locations. Further, as shown in FIG. 13, the clamp member holding portion 235 is formed with an inclined surface 235 b inclined with respect to the major axis direction of the spindle 220. Further, as shown in FIG. 15, an engagement recess 236 that engages with the engagement projection 233 c of the rotational force transmission member 233 is formed on the outer peripheral surface of the screwing member 231.

  As illustrated in FIGS. 13 to 15, the clamp member 232 is a substantially wedge-shaped member and is disposed in the clamp member holding portion 235. The clamp member 232 is configured to hold the clamp shaft 223 in cooperation with the screwing member 231. That is, the clamp member 232 is formed with an inclined surface 232 a that engages with the inclined surface 235 b of the screwing member 231. Further, on the side surface of the clamp member 232, convex portions 232b that engage with the engaging concave portions 235a of the screwing member 231 are provided at two locations. Further, the clamp member 232 is formed with two movement restricting portions 232c formed to protrude downward.

  As shown in FIG. 13, the rotational force transmission member 233 is a member that rotates the screwing member 231 relative to the spindle 220 by transmitting the rotation of the thrust pin 140 to the screwing member 231. The rotational force transmission member 233 has a main body portion 233a formed in a substantially disc shape. As shown in FIG. 16, the main body 233a is formed with a substantially rectangular engagement hole 233b with which the engagement portion 141 of the thrust pin 140 is engaged. Further, as shown in FIG. 15, the rotational force transmitting member 233 has two convex portions 233c that engage with the engaging concave portion 236 of the screwing member 231 and are connected to the main body portion 233a so as to protrude from the main body portion 233a. Is formed.

  In the clamp shaft holding mechanism 230 configured as described above, the screw member 231 is rotated by the rotation force transmission member 233 being rotated by the thrust pin 140. Thereby, the screwing member 231 is moved in the long axis direction of the spindle 220. As the screwing member 231 moves, the inclined surface 235a of the clamp member holding portion 235 and the inclined surface 232a of the clamp member 232 engage with each other, and the movement of the clamp member 232 in the major axis direction of the spindle 220 moves. Is converted into radial movement. Thereby, the clamp member 232 moves in the radial direction of the spindle 220, and the clamp shaft 223 inserted into the spindle 220 can be held. This clamp member 232 is an implementation structural example corresponding to the "holding member" in this invention.

  In the second embodiment, the thrust pin 140 is moved in the long axis direction by turning the lever portion 151 in the circumferential direction of the turning shaft 153 between the position shown in FIG. 12 and the position shown in FIG. Can do. By moving the thrust pin 140, the engaging portion 141 can be engaged with the engaging hole 233b of the rotation transmitting member 233. Since the rotation transmitting member 233 is rotatable with respect to the spindle 220, depending on the position of the engagement hole 233b, the rotation of the lever 151 around the rotation shaft 153 is not related to the engagement 141. The joint hole 233b may not engage. When the engagement portion 141 and the engagement hole 233b do not engage with each other, as shown in FIG. 18, the lever portion 151 is turned around the long axis of the spindle 220, so that the engagement portion 141 and the engagement hole 233b are moved. Can be engaged.

  As shown in FIG. 18, when the engaging portion 141 and the engaging hole 233 b are engaged, the lever portion 151 is turned in the circumferential direction of the spindle 220, so that the rotational force transmitting member 233 is moved in the circumferential direction of the spindle 220. Can be rotated. By the rotation of the rotational force transmission member 233, the convex portion 233c of the rotational force transmission member 233 rotates the screwing member 231 in the circumferential direction of the spindle 220. As a result, the screwing member 231 rotates relative to the spindle 220 and moves in the major axis direction of the spindle 220.

  When the screwing member 231 moves in the major axis direction of the spindle 220 to the side where the cam lever mechanism 150 is disposed (upward), the clamp shaft 223 inserted into the clamp shaft insertion hole 234 is held by the clamp member 232. Can do. That is, when the screwing member 231 moves upward, the clamp member 232 held by the clamp member holding portion 235 also moves upward. When the rotational force transmission member 233 comes into contact with the second stepped portion 220b and the clamp member 232 comes into contact with the rotational force transmission member 233, the clamp member 232 is sandwiched between the rotational force transmission member 233 and the screwing member 231. Thus, the upward movement of the clamp member 232 is restricted. Further, when the screwing member 231 is moved upward, the moving direction of the clamp member 232 is converted by the inclined surface 232a and the inclined surface 235b, and the clamp member 232 moves in the direction toward the center in the radial direction of the spindle 220. Is done. Thereby, the clamp shaft 223 is held between the screw member 231 by the clamp member 232. As a result, the blade 200 is sandwiched between the flange 222 and the clamp head 224.

  On the other hand, when the lever portion 151 is rotated around the long axis of the spindle 220 and the screwing member 231 is moved to the side where the flange 222 is disposed (downward) in the long axis direction of the spindle 220, the clamp member Clamping of the clamp shaft 223 by 232 can be released. When the screw member 231 is moved downward by being rotated by the thrust pin 140, the movement restricting portion 232c of the clamp member 232 comes into contact with the guide member 221, and the downward movement of the clamp member 232 is restricted. . Further, when the screwing member 231 is moved downward, the engagement between the inclined surface 232a and the inclined surface 235b is released. Thereby, holding | maintenance of the clamp shaft 223 by the clamp member 232 is cancelled | released, and the clamp shaft 223 can be removed. By removing the clamp shaft 223, the blade 200 sandwiched between the flange 222 and the clamp head 224 can be replaced.

  According to the second embodiment described above, the holding member 232 is moved in the radial direction of the clamp shaft 223 by the screwing of the screwing member 231 and the spindle 220. That is, since the movement due to the screwing of the screwing member 231 and the spindle 220 is converted into the movement of the holding member 232 in the radial direction of the clamp shaft 223, the holding force for holding the clamp shaft 223 is large. Can be easily generated.

  Also in the second embodiment, as shown in FIG. 12, the movable pin 157 engages with the engagement recess 101 a, and the lever portion 151 is fixed to the main body housing 101. Further, the lever portion 151 is configured to be rotatable in the circumferential direction of the spindle 220 and the circumferential direction of the turning shaft 153, but the distal end portion of the movable pin 157 is arranged in the circumferential direction of the spindle 120 and the circumferential direction of the turning shaft 153. Therefore, even if the lever portion 151 is swung in any of a plurality of directions, the tip end abuts against the main body housing 101, and the movable pin 157 becomes the lever portion 151. Get inside. Accordingly, the movable pin 157 can be engaged with or released from the engaging recess 101a even if the lever portion 151 is turned in any of a plurality of directions.

  According to the first and second embodiments described above, the lever portion 151 can turn in the circumferential direction of the turning shaft 153 and in the circumferential direction of the spindles 120 and 220. In other words, the lever part 151 can turn in a plurality of directions. The lever 151 is provided with a movable pin 157, and the tip of the movable pin 157 has a curved surface, so that the movable pin 157 is engaged with the main body housing 101 regardless of the direction of rotation. It can be engaged with the mating recess 101a. Accordingly, the lever portion 151 can be held by the main body housing 101 regardless of which direction the lever portion 151 is turned. In particular, the electric motors of the first and second embodiments require the lever portion 151 to pivot in a plurality of directions in order for the thrust pin 140 to engage with the screwing member and rotate the screwing member. This is effective in the vibration tool 100.

(Third embodiment)
Next, a third embodiment of the present invention will be described in detail with reference to FIGS. In the third embodiment, the clamp shaft holding mechanism 330 in the tool holding mechanism 303 is configured such that the clamp member 331 holds the clamp shaft 323 by the urging force of the O-ring 332 and the coil spring 334. Further, by operating the lever portion 351, the tool holding release mechanism 304 is operated, and thereby the blade 200 is configured to be detachable. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 19, the spindle 320 in the third embodiment is a hollow cylindrical member, and is arranged so that the major axis direction extends in a direction intersecting the output shaft 111 of the motor 110. . The spindle 320 is supported by the main body housing 101 via bearings 325 and 326 so as to be rotatable around the long axis direction at two locations in the long axis direction. The spindle 320 is formed with a clamp member insertion hole 320a penetrating in the radial direction of the spindle 320 in an intermediate region between the bearings 325 and 326 in the long axis direction. As shown in FIG. 20, the spindle 320 is a direction intersecting with the clamp member insertion hole 320 a in the intermediate region between the clamp member insertion hole 320 a and the bearing 326 in the long axis direction, and the radial direction of the spindle 320. An engagement pin insertion hole 320b that penetrates through is formed. A flange 322 is attached to the tip of the spindle 320. The spindle 320 corresponds to the “first shaft” according to the present invention, and the flange 322 corresponds to the “first clamp portion” according to the present invention.

  The clamp shaft holding mechanism 330 is a mechanism that holds the end of the clamp shaft 323 opposite to the clamp head 324. As shown in FIGS. 19 to 21, the clamp shaft holding mechanism 330 is mainly composed of a clamp member 331, an O-ring 332, an annular member 333, and a coil spring 334.

  As shown in FIG. 19, the clamp members 331 are members that are disposed at two opposing positions in the circumferential direction of the spindle 320 and are inserted through the clamp member insertion holes 320 a of the spindle 320. The clamp member 331 is configured to be movable in the radial direction of the spindle 320 through the clamp member insertion hole 320a. The clamp member 331 has a plurality of convex portions that can be engaged with the engagement grooves of the clamp shaft 323 at positions facing the clamp shaft 323. As shown in FIG. 21, the clamp member 331 has an inclined surface 331 a that is inclined with respect to the major axis direction of the spindle 320. The inclined surface 331a is configured to engage with the inclined surface of the annular member 333.

  As shown in FIG. 19, an O-ring 332 is disposed outside the clamp member 331. The O-ring 332 biases the clamp member 331 in the radial direction toward the center of the spindle 320. Thereby, the convex part formed in the clamp member 331 engages with the engagement groove of the clamp shaft 323 disposed inside the spindle 320, so that the clamp shaft 323 can be held. Further, the O-ring 332 not only applies an urging force for holding the clamp shaft 323 to the clamp member 331, but also makes the posture of the clamp member 331 even when the clamp member 331 does not hold the clamp shaft 323. An urging force for holding is applied to the clamp member 331.

  The annular member 333 is an annular member disposed so as to surround the outer side of the clamp member 331 in the radial direction of the spindle 320. The annular member 333 is configured to be movable in the major axis direction of the spindle 320. The annular member 333 has an inclined surface that engages with the inclined surface 331 a of the clamp member 331. The coil spring 334 is disposed around the spindle 320 along the long axis direction of the spindle 320. The annular member 333 is urged in the long axis direction of the spindle 320 by the urging force of the coil spring 334, thereby engaging with the inclined surface 331 a of the clamp member 331, so that the clamp member 331 has a diameter of the spindle 320. Energized in the direction. That is, the clamp member 331 is moved in the radial direction of the spindle 320 by the engagement of the inclined surfaces of the clamp member 331 and the annular member 333.

  In the clamp shaft holding mechanism 330 configured as described above, the clamp member 331 is biased in the radial direction of the spindle 320 by the O-ring 332 and holds the clamp shaft 323. Further, the annular member 333 biased by the coil spring 334 engages with the inclined surface 331 a of the clamp member 331, thereby converting the biasing force of the coil spring 334 into the radial biasing force of the spindle 320. Accordingly, the coil spring 334 biases the clamp member 331 in the radial direction of the spindle 320 and holds the clamp shaft 323. That is, the clamp shaft 323 is held by the urging force of the O-ring 332 and / or the urging force of the coil spring 334.

  The coil spring 334 biases the annular member 333, thereby holding the clamp shaft 323 and urging the clamp shaft 323 upward. Accordingly, the clamp head 324 is urged in the direction approaching the flange 322, and the blade 200 is sandwiched between the flange 322 and the clamp head 324.

  The tool holding release mechanism 304 is a mechanism that allows the blade 200 held between the flange 322 and the clamp shaft 323 to be detachable by releasing the holding of the clamp shaft 323 held by the clamp shaft holding mechanism 330. As shown in FIG. 19, the tool holding release mechanism 304 is mainly configured by a thrust pin 340, an engagement pin 341, a clamp shaft holding release member 342, a cam lever 350 mechanism, and the like.

  As shown in FIG. 19, the thrust pin 340 is disposed inside the spindle 320 and is slidable in the major axis direction of the spindle 320. As shown in FIG. 20, the engagement pin 341 is inserted through the engagement pin insertion hole 320 b of the spindle 320 and is engaged with the clamp shaft holding release member 342. The engaging pin 341 is configured to move in contact with the thrust pin 340 as the thrust pin 340 moves.

  As shown in FIG. 21, the clamp shaft holding / releasing member 342 is a cylindrical member surrounding the outer periphery of the spindle 320. The clamp shaft holding / releasing member 342 is movable together with the engaging pin 341 in the long axis direction of the spindle 320. Further, the clamp shaft holding / releasing member 342 is configured to be movable in the longitudinal direction of the spindle 320 together with the annular member 333 by engaging with the annular member 333.

  As shown in FIGS. 19 and 20, the cam lever mechanism 350 is a member that abuts against the thrust pin 340 and slides the thrust pin 340 in the major axis direction of the spindle 320. The cam lever mechanism 350 is mainly composed of a lever portion 351, an eccentric portion 352, and a turning shaft 353. In the third embodiment, the lever portion 351 is configured to turn only around the turning shaft 353.

  As shown in FIG. 19, the lever portion 351 houses a coil spring 356 and a movable pin 357. The coil spring 356 and the movable pin 357 are disposed along the long axis direction of the lever portion 351. The coil spring 356 has one end in contact with the eccentric portion 352 and the other end in contact with the movable pin 357. As a result, the coil spring 356 biases the movable pin 357. In other words, the coil spring 356 biases the movable pin 357 along the long axis direction of the lever portion 351 extending from the turning shaft 353 that is a fulcrum of the lever portion 351.

  The movable pin 357 has a curved tip at the end opposite to the side in contact with the coil spring 356. That is, it is formed in a curved shape with respect to the circumferential direction of the turning shaft 353 that is the turning direction of the lever portion 351. Further, the movable pin 357 is configured to be urged by the coil spring 356 so that the distal end portion protrudes from the lever portion 351 and enters the lever portion 351 by pressing the distal end portion against the urging force of the coil spring 356. Has been.

  As shown in FIG. 19, when the lever portion 351 is positioned in the direction from the turning shaft 353 toward the motor 110 (hereinafter referred to as a clamp position), the eccentric portion 352 is not in contact with the thrust pin 340. On the other hand, as shown in FIG. 22, when the lever portion 351 is turned so that the lever portion 351 is positioned in a direction opposite to the clamp position from the turning shaft 353 (hereinafter referred to as a release position), the eccentric portion 352. Is in contact with the thrust pin 340. That is, by turning the lever portion 351 from the clamp position toward the release position, the eccentric portion 352 contacts the thrust pin 340 on the way to the release position. Further, the eccentric portion 352 moves the thrust pin 340 downward in the longitudinal direction of the spindle 320 by turning the lever portion 351 toward the release position from that position.

  The tool holding release mechanism 304 configured as described above turns the lever portion 351 from the clamp position to the release position and slides the thrust pin 340, whereby the engagement pin 341 and the clamp shaft holding release member 342 are moved to the spindle. 320 moves downward in the major axis direction. At this time, the clamp shaft holding / releasing member 342 moves together with the annular member 333 downward in the major axis direction of the spindle 320, and moves the clamp member 331 in the major axis direction of the spindle 320. After the clamp member 331 comes into contact with the spindle 320, the clamp shaft holding / releasing member 342 moves downward together with the annular member 333 in the longitudinal direction of the spindle 320, so that the inclined surface 331a of the annular member 333 and the clamp member 331 is moved. The engagement can be released. Thereby, the urging force of the coil spring 334 is not transmitted to the clamp member 331, and the urging force of the coil spring 334 acting on the clamp shaft 323 can be released. By reducing the biasing force for holding the clamp shaft 323, the holding of the clamp shaft 323 can be released, and the clamp shaft 323 can be detached from the spindle 320. Thereby, the blade 200 can be removed.

  On the other hand, when the blade 200 is mounted, the lever portion 351 is swung from the release position to the clamp position with the blade 200 disposed between the flange 322 and the clamp head 324 and the clamp shaft 323 inserted into the spindle 320. Let As the lever portion 351 turns, the thrust pin 340 and the annular member 333 are moved upward in the longitudinal direction of the spindle 320 by the biasing force of the coil spring 334. Then, the inclined surface of the annular member 333 and the inclined surface 331a of the clamp member 331 are engaged, and the urging force of the coil spring 334 is converted into the urging force in the radial direction of the spindle 320. As a result, the clamp member 331 is moved toward the center of the spindle 320 in the radial direction, and the convex portion of the clamp member 331 engages with the engagement groove of the clamp shaft 323 to hold the clamp shaft 323. At this time, the urging force of the coil spring 334 moves the clamp head 324 in the direction close to the flange 322 by holding the clamp shaft 323 via the clamp member 331 and moving the held clamp shaft 323 upward. Let As a result, the blade 200 is held between the flange 322 and the clamp head 324.

  In addition, as shown in FIG. 19, when the lever portion 351 is located at the clamp position, the movable pin 357 engages with the engagement recess 101 a of the main body housing 101, and the lever portion 351 is relative to the main body housing 101. Fixed. The position of the lever portion 351 shown in FIG. 19 is an implementation configuration example corresponding to the “operating member storage position” in the present invention.

  Further, when the lever portion 351 is turned between the position shown in FIG. 19 and the position shown in FIG. 22, the movable pin 357 comes into contact with the main body housing 101 so that the tip end portion resists the urging force of the coil spring 356. It is pressed and enters the lever portion 351. That is, since the distal end portion of the movable pin 357 is formed in a curved shape, when the lever portion 351 is turned, the distal end portion comes into contact with the main body housing 101, so that the movable pin 357 enters the lever portion 351. . Thereby, by turning the lever part 351, the movable pin 357 can be engaged with the engaging recess 101a, or the engagement can be released.

  According to the third embodiment described above, the clamp shaft 323 disposed inside the spindle 320 can be held by the urging force of the O-ring 332 or the coil spring 334 disposed outside the spindle 320. Can be made thinner. Therefore, the spindle 320 is reduced in weight, and the electric vibration tool 100 can be reduced in weight.

  In the electric vibration tool 100 according to the first to third embodiments configured as described above, when the motor 110 is energized and driven, as shown in FIG. And the bearing 113 is converted into a reciprocating motion in a direction indicated by an arrow A (hereinafter, A direction). The reciprocating motion in the A direction is transmitted to the driven arm 114, and is predetermined in the circumferential direction (hereinafter referred to as the B direction) around the spindles 120, 220, and 320 indicated by the arrow B around the spindle connecting portion 115. It is converted into a rotational motion that makes an angle of. As a result, the spindle 120 connected to the spindle connecting portion 115 is driven to reciprocate in the B direction. As a result, the blade 200 sandwiched between the flanges 122, 222, 322 and the clamp heads 124, 224, 324 can be vibrated to perform processing such as cutting on the workpiece.

  According to each of the embodiments described above, the lever portions 151 and 351 can be held by the movable pins 157 and 357 engaging with the engaging recesses of the main body housing 101. That is, since the lever portions 151 and 351 are held in a state where the blade 200 is held, the lever portions 151 and 351 are securely held when the electric vibration tool 100 performs a machining operation on the workpiece. The Thereby, the movement of the lever parts 151 and 351 at the time of a machining operation can be suppressed.

  Further, according to the above, since the coil springs 156 and 356 and the movable pins 157 and 357 are accommodated in the lever portions 157 and 357, the lever portion 151 is compared with the configuration in which the lever portions 151 and 351 are held from the outside. , 351, there is no member that interferes with the operation. That is, when holding the lever portions 151 and 351 from the outside, it is necessary to provide holding members for holding the lever portions 151 and 351 on the main body housing 101 side, for example. However, when the holding member is provided on the main body housing 101 side, there is a possibility that the user's operation may be hindered when operating the lever portions 151 and 351. Therefore, according to the present invention, since the coil springs 156 and 356 and the movable pins 157 and 357 are accommodated in the lever portions 151 and 351, the user's operation is not hindered.

  Further, according to the above, the coil springs 156 and 356 are arranged in a direction extending in the major axis direction of the lever portions 151 and 351 from the turning shafts 153 and 353 which are fulcrums of the lever portions 151 and 351. Therefore, the movable pins 157 and 357 are biased in the major axis direction of the lever portions 151 and 351 by the coil springs 156 and 356. Therefore, the lever portions 151 and 351 are held by the main body housing 101 at a portion separated from the fulcrum of the lever portions 151 and 351, which is particularly effective in the configuration of holding the lever portions 151 and 351 that perform the turning operation.

  In the above embodiment, the coil springs 156 and 356 and the movable pins 157 and 357 are accommodated in the lever portions 157 and 357, but this is not restrictive. For example, the coil springs 156 and 356 and the movable pins 157 and 357 may be exposed on the surfaces of the lever portions 157 and 357. Further, the coil springs 156 and 356 and the movable pins 157 and 357 may be provided in the main body housing 101.

  In the above description, the blade 200 is used as the tip tool. However, the present invention is not limited to this. For example, another type of tip tool such as a polishing pad may be attached as the tip tool.

  In the above-described embodiment, the electric vibration tool 100 has been described as the work tool. However, the present invention is not limited to this, and a work tool that sandwiches the tip tool may be a grinder or a circular saw, for example. The present invention can also be applied to a work tool in which the tip tool rotates.

(Correspondence between each component of the embodiment and each component of the present invention)
This embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment. The correspondence between each component of the present embodiment and each component of the present invention is shown below.
The electric vibration tool 100 is an example of a configuration corresponding to the “work tool” of the present invention.
The blade 200 is an example of a configuration corresponding to the “tip tool” of the present invention.
The spindles 120, 220, and 320 are an example of a configuration corresponding to the “first shaft” of the present invention.
The flanges 122, 222, and 322 are an example of a configuration corresponding to the “first clamp portion” of the present invention.
The clamp shafts 123, 223, and 323 are an example of a configuration corresponding to the “second shaft” of the present invention.
The clamp heads 124, 224, and 324 are an example of a configuration corresponding to the “second clamp portion” of the present invention.
The clamp shaft holding member 131 is an example of a configuration corresponding to the “holding member” of the present invention.
The clamp member 232 is an example of a configuration corresponding to the “holding member” of the present invention.
The clamp member 331 is an example of a configuration corresponding to the “holding member” of the present invention.
The lever portions 151 and 351 are an example of a configuration corresponding to the “operation member” of the present invention.
The coil springs 156 and 357 are an example of a configuration corresponding to the “elastic member” of the present invention.
The movable pins 157 and 357 are an example of a configuration corresponding to the “engagement member” of the present invention.
The main body housing 101 is an example of a configuration corresponding to the “work tool main body” of the present invention.
The clamp shaft holding member 131 is an example of a configuration corresponding to the “screwing member” of the present invention.
The screwing member 231 is an example of a configuration corresponding to the “screwing member” of the present invention.
The screwing member 231 is an example of a configuration corresponding to the “color” of the present invention.
The clamp member 232 is an example of a configuration corresponding to the “movable member” of the present invention.

In view of the gist of the above invention, the working tool according to the present invention can be configured in the following manner.
(Aspect 1)
“A work tool according to claim 4,
The operating member is provided with an elastic member and an engaging member that is urged and moved by the elastic member,
The work tool is configured so that the engagement member engages with the work tool main body at the storage position of the operation member. "

(Aspect 2)
“A work tool according to aspect 1,
The work tool characterized in that the elastic member is accommodated in the operation member. "

(Aspect 3)
“A work tool according to aspect 1 or 2,
The operation member is configured to extend in a predetermined direction from a fulcrum supporting the operation member,
The work tool characterized in that the elastic member is configured to bias the engaging member along the predetermined direction. "

(Aspect 4)
"A work tool according to any one of claims 1 to 7 and aspects 1 to 3,
The work tool main body is formed with a recess that can be engaged with the engagement member. "

DESCRIPTION OF SYMBOLS 100 Electric vibration tool 101 Main body housing 101a Engagement recessed part 102 Drive mechanism 103 Tool holding mechanism 104 Rotation control mechanism 110 Motor 111 Output shaft 112 Drive shaft 113 Bearing 114 Driven arm 115 Spindle connection part 120 Spindle 121 Spindle extension member 122 Flange 123 Clamp shaft 124 Clamp head 130 Clamp shaft holding mechanism 131 Clamp shaft holding member 132 O-ring 133 Screw part 134 Groove part 135 Protruding part 140 Thrust pin 141 Engaging part 142 Coupling part 143 Coil spring 144 O-ring 150 Cam lever mechanism 151 Lever part 152 Eccentric part 153 Rotating shaft 154 Rotating member 155 O-ring 156 Coil spring 157 Movable pin 157a Protruding portion 200 Blade 203 Tool holding mechanism 22 Spindle 220a First stepped portion 220b Second stepped portion 220c Thread 221 Guide member 222 Flange 223 Clamp shaft 224 Clamp head 230 Clamp shaft holding mechanism 231 Screw member 231a Thread 232 Clamp member 232a Inclined surface 232b Protruding portion 232c Movement Restriction portion 233 Rotation transmission member 233a Main body portion 233b Engagement hole 234 Clamp shaft insertion hole 235 Clamp member holding portion 235a Engagement recess 235b Inclined surface 236 Engagement recess 303 Tool holding mechanism 304 Tool holding release mechanism 320 Spindle 320a Clamp member insertion hole 320b engagement pin insertion hole 322 flange 323 clamp shaft 330 clamp shaft holding mechanism 331 clamp member 331a inclined surface 332 O-ring 333 annular member 334 coil spring 50 cam lever mechanism 351 lever portion 352 eccentric portion 353 pivot 356 coil spring 357 movable pin

Claims (7)

A first shaft having a first clamp portion;
Having a second clamp part and having a second shaft movable relative to the first shaft;
A work tool for driving a tip tool sandwiched between the first clamp part and the second clamp part,
A holding member that engages with the second shaft and holds the second shaft;
An operation member for moving the holding member relative to the second shaft;
The operation member is provided with an elastic member and an engagement member that is movable by being urged by the elastic member,
The work tool is configured so that the engagement member engages with the work tool main body at the storage position of the operation member. The work tool according to claim 1,
The work tool characterized in that the elastic member is accommodated in the operation member. The work tool according to claim 1 or 2,
The operation member is configured to extend in a predetermined direction from a fulcrum on which the operation member is supported,
The work tool characterized in that the elastic member is configured to bias the engaging member along the predetermined direction. A first shaft having a first clamp portion;
Having a second clamp part and having a second shaft movable relative to the first shaft;
A work tool for driving a tip tool sandwiched between the first clamp part and the second clamp part,
A holding member that engages with the second shaft and holds the second shaft;
An operation member for moving the holding member relative to the second shaft;
The operation member is configured to be movable in a plurality of directions, and is configured to be disposed at a storage position in which the operation member is stored by movement in at least one of the plurality of directions.
A work tool, wherein the operation member is configured to engage with a work tool main body at the storage position of the operation member. The work tool according to any one of claims 1 to 4,
The holding member includes a screwing member that is screwed with the first shaft or the second shaft,
The operating tool is configured to rotate the screwing member. The work tool according to claim 5,
The work tool, wherein the screwing member is configured to be screwed with the second shaft to hold the second shaft. The work tool according to claim 5,
The screwing member is configured as a collar screwed with the first shaft,
A movable member engaged with the collar and holding the second shaft;
When the collar rotates with respect to the first shaft, the movable member moves in the radial direction of the second shaft by the movement of the collar in the long axis direction of the first shaft. It is comprised so that it may hold | maintain, The work tool characterized by the above-mentioned.

Images