JP6598703B2 - Dust collector and work tool - Google Patents

Description

  The present invention relates to a dust collector configured to be detachable from a work tool, and a work tool including the dust collector.

  2. Description of the Related Art There is known a dust collector that is attached to a work tool such as a drill or a hammer drill and sucks dust generated by drilling work or the like. For example, a dust collector disclosed in Patent Document 1 includes a housing attached to a hammer drill, a cylindrical ventilation member, a nozzle connected to the front end of the ventilation member, and having a dust suction port at one end; There is disclosed a dust collector including a hose connected to the other end and extending inside the ventilation member, and a dust box for storing dust transferred through the nozzle and the hose. The ventilation member is inserted into a guide passage provided in the housing so as to be slidable in the front-rear direction with respect to the housing.

JP 2013-78831 A

  In the dust collector, the ventilation member is formed with a rack extending in the front-rear direction. On the other hand, a retaining member capable of engaging with the rack is provided at the front end of the housing. The operator positions the ventilation member with respect to the housing by sliding the ventilation member in the front-rear direction in accordance with the length of the tool bit attached to the hammer drill and engaging the retaining member with the rack in advance. Can do.

  The dust collector is configured such that the retaining member cannot be engaged with the rack unless the retaining member and the ventilation member are operated according to a predetermined procedure. However, in the configuration of the dust collector, the operator may not be aware that he / she is operating in an incorrect procedure until all the steps are completed. Therefore, further improvement is desired for the operability of the dust collector.

  This invention makes it a subject to provide the technique which contributes to the improvement of the further operativity in the dust collection operation | work using a working tool.

  According to one aspect of the present invention, there is provided a dust collector configured to be detachable from a work tool that drives a tip tool to perform a machining operation on a workpiece. The dust collector includes a main body, a cylindrical member, a locking piece, an operation member, and a lock member.

  The main body has an opening that opens to the outside and a first passage that is a passage for transferring dust generated in the processing operation and connected to the opening. A cylindrical member has the 2nd channel | path for the transfer of the said dust inside. The cylindrical member has one end inserted into the opening of the main body so that the first passage and the second passage communicate with each other, can move relative to the main body in the axial direction, and protrudes from the opening. It is held in the main body in an energized state. Typically, the cylindrical member should just be urged | biased in the direction which protrudes from an opening part by the urging | biasing part (for example, spring) with which a dust collector is provided. The tubular member has a plurality of protrusions arranged in a line in the axial direction on the outer surface. The locking piece is configured to be movable relative to the main body together with the cylindrical member in the axial direction of the cylindrical member while being locked to at least one of the plurality of protrusions.

  The operation member is provided on the main body, and is configured to be relatively movable between the first operation position and the second operation position with respect to the main body in accordance with a manual operation from the outside of the main body. The operation member is moved relative to the second operation position from the first operation position on the condition that the locking piece is disposed at a predetermined operation position with respect to the operation member in the axial direction of the cylindrical member. The locking pieces are unlocked from the plurality of protrusions, and the locking pieces are prohibited from moving together with the cylindrical member in the axial direction of the transfer portion. The operation member is moved from the second operation position to the first operation position on the condition that the engagement piece is disposed at the operation position in the axial direction, so that the engagement piece is moved to at least one of the plurality of protrusions. The tubular member is configured so as to be locked in one and prohibited from relative movement in a direction protruding from the opening. The lock member is provided on the operation member. Typically, the lock member is configured to be interlocked with the operation member. The locking member allows the relative movement of the operating member with respect to the main body when the locking piece is disposed at the operating position in the axial direction of the cylindrical member, while the locking member does not allow the operating member to move when the locking piece is not positioned at the operating position. It is configured to prohibit relative movement with respect to the main body.

  When an operator uses the dust collector having such a configuration on a work tool, the worker applies the cylindrical member biased in the protruding direction to the main body in the axial direction (that is, the direction protruding from the opening or the first The amount of protrusion from the opening of the cylindrical member is adjusted according to the length of the tip tool. In this case, the operator first moves the operation member from the first operation position to the second operation position in a state where the locking piece is disposed at a predetermined operation position with respect to the operation member in the axial direction of the cylindrical member. To do. Then, even if the locking of the locking pieces with respect to the plurality of protrusions is released and the cylindrical member is moved in the axial direction, the locking pieces are prohibited from moving together with the cylindrical member. Therefore, the operator appropriately moves only the cylindrical member in the axial direction, and then relatively moves the operation member from the second operation position to the first operation position, so that the locking piece is attached to the cylindrical member. It can be locked to a protrusion different from that before the relative movement. Thereby, the relative movement in the protruding direction of the urged cylindrical member is prohibited, whereby the positioning of the cylindrical member with respect to the main body is completed. In this process, when the locking piece is not arranged at the operating position, the lock member prohibits the relative movement of the operation member itself, so that the operator moves the operation member relative to the main body at this time. I can't do it. Therefore, the operator can immediately notice that he / she has made a mistake and can correct the procedure. That is, according to the dust collector according to this aspect, it is possible to improve operability when adjusting the position of the cylindrical member with respect to the main body (the amount of protrusion of the cylindrical member from the opening).

  As one aspect of the dust collecting apparatus according to the present invention, the lock member is relatively moved in the same direction as the operation member with respect to the main body in accordance with the relative movement of the operation member, so that the locking piece is attached to at least the plurality of protrusions You may also use the latching piece moving member comprised so that it may move between the latching position locked to one, and the cancellation | release position where the latching with respect to several protrusion was cancelled | released. That is, the lock member provided on the operation member functions as a movement prohibition member for the operation member that prohibits relative movement of the operation member when the engagement piece is not disposed at the operation position, while the engagement piece is at the operation position. When arranged, it may function as a moving member for the locking piece that moves relative to the locking member and moves the locking piece between the locking position and the release position by moving together with the operation member. In this case, compared with the case where the movement prohibiting member of the operation member and the moving member of the locking piece are configured as separate members, the above two functions can be achieved with a simpler and more compact configuration.

  As an aspect of the dust collector according to the present invention, the operation member may be configured to be relatively movable with respect to the main body in a direction intersecting the axial direction of the cylindrical member. In this case, the arrangement direction of the plurality of protrusions in the tubular member and the operation direction of the operation member for locking the locking pieces to the protrusions or releasing the locking intersect each other. The stop piece can be locked or released. Moreover, since the relative movement direction of the cylindrical member and the operation direction of the operation member intersect each other, each operation can be distinguished and performed reliably.

  As one aspect of the dust collecting apparatus according to the present invention, when the locking piece is not disposed at the operating position, the locking member interferes with the interference portion provided in the cylindrical member, so that the operation member is relative to the main body. You may be comprised so that a movement may be prohibited. In addition, the interference part should just be provided as a protrusion part extended in the direction which cross | intersects the relative movement direction of an operation member typically. In this case, the function of prohibiting the movement of the operation member by the lock member can be realized by a simple configuration in which the interference member is provided in the cylindrical member.

  As one aspect of the dust collecting apparatus according to the present invention, the lock member is provided on the operation member and is provided with a rotation unit rotatably supported by the operation member, and the rotation unit is urged toward the cylindrical member. And an urging portion to be included. The rotating portion rotates between a movement allowable position where the interference portion does not intervene on the movement path when moving relative to the main body together with the operation member, and a movement prohibition position where the interference portion intervenes on the movement path. It may be configured to be movable. Further, the rotating portion is configured to be disposed at the movement allowable position when the locking piece is disposed at the operating position, and to be disposed at the movement prohibiting position when the locking piece is not disposed at the operating position. May be. In this case, it is possible to easily switch between permission and prohibition of the relative movement of the operation member by the rotation operation between the movement allowable position and the movement prohibition position of the rotation unit.

  As one aspect of the dust collecting apparatus according to the present invention, the locking piece abuts on the rotating portion when moving relative to the operating position from a position different from the operating position in the axial direction of the cylindrical member. May be configured to be rotated from the movement prohibition position to the movement allowable position against the urging force and disposed between the rotation portion and the cylindrical member. An inclined portion that is inclined in the axial direction may be formed in at least one of the contact portion of the rotating portion with the locking piece and the contact portion of the locking piece with the rotating portion. . In this case, when the locking piece relatively moves to the operating position, the operation of contacting the rotating portion to rotate the rotating portion and being disposed between the rotating portion and the cylindrical member is an inclined portion. Is realized smoothly.

  As one aspect of the dust collector according to the present invention, the lock member may be made of metal. By making the lock member made of metal having high rigidity, the operation member movement prohibiting function can be surely achieved. Further, the durability of the lock member can be increased.

  Moreover, according to one aspect of the present invention, there is provided a work tool that drives a tip tool to perform a machining operation on a workpiece. This work tool includes a tool main body and a dust collector that is detachably attached to the tool main body. Any of the above-described dust collectors can be employed as the dust collector. Such a work tool can exhibit the above-described effects realized by the employed dust collector.

It is the longitudinal cross-section of the hammer drill with which the dust collector was mounted | worn. It is sectional drawing in the II-II line | wire of FIG. 1 when the latching piece is not arrange | positioned in the operation position. FIG. 3 is a cross-sectional view of a locking mechanism and a peripheral portion corresponding to FIG. 2. It is a perspective view of a locking piece. It is a perspective view of a locking mechanism and a locking piece. It is a perspective view of an operation member. It is a perspective view of a rotation part. It is sectional drawing in the II-II line | wire of FIG. 1 when a securing piece is arrange | positioned in an operation position. FIG. 9 is a cross-sectional view of the lock mechanism and the peripheral portion corresponding to FIG. 8. It is sectional drawing which shows a state when an operation member is moved to the 2nd operation position from the 1st operation position shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment, an electric hammer drill 1 will be described as an example of a working tool that drives the tip tool 19 to perform a machining operation. As an example of the dust collector, a dust collector 3 configured to be detachable from the hammer drill 1 will be described.

  First, the overall configuration of the hammer drill 1 will be described with reference to FIG. As shown in FIG. 1, the hammer drill 1 includes a main body portion 10 and a handle 13. The main body 10 is formed in a long shape. A tool holder 12 to which the tip tool 19 can be attached and detached is provided at one end in the major axis direction of the main body 10, and the handle 13 extends from the other end in a direction intersecting the major axis of the main body 10. It extends. As the tip tool 19 that can be attached to the tool holder 12, a plurality of tools (drill bit, hammer bit, etc.) having different types and lengths are prepared corresponding to various machining operations. The hammer drill 1 of the present embodiment performs an operation (hammer operation) for driving the tip tool 19 linearly in the axial direction of the tip tool 19 and an operation (drill operation) for rotating the tip tool 19 around the axis. It is configured. The operator selects a tip tool 19 of an appropriate type and length according to the actual work to be performed, and inserts the tip tool into the tool holder 12 so that the axial direction of the tool matches the major axis direction of the main body 10. 19 is installed.

  Hereinafter, with reference to FIG. 1, the detailed structure of the main-body part 10 and the handle | steering-wheel 13 is demonstrated in order. In the following description, for convenience, the direction that coincides with the axis of the tip tool 19 mounted on the tool holder 12 (that is, the longitudinal direction of the main body 10) is defined as the front-rear direction of the hammer drill 1, and the tool holder 12 is provided. The side to which the handle is connected is defined as the front side of the hammer drill 1 and the side to which the handle 13 is connected as the rear side. The direction perpendicular to the axis of the tip tool 19 and corresponding to the extending direction of the handle 13 is defined as the up-and-down direction, the side where the handle 13 is connected to the main body 10 is the upper side, and the tip of the handle 13 (free end) ) Is defined as the lower side.

  The main body 10 includes a main body housing 11, a tool holder 12, a motor 20, a motion conversion mechanism 21, a striking element 23, and a rotation transmission mechanism 25. Hereinafter, these configurations will be described in order.

  As shown in FIG. 1, the main body housing 11 is a housing that forms an outline of the main body 10, and houses the tool holder 12, the motor 20, the motion conversion mechanism 21, the striking element 23, and the rotation transmission mechanism 25 therein. . The main body housing 11 is formed by combining a plurality of parts such as a part that accommodates the motor 20 and a part that accommodates the drive mechanism of the tip tool 19 (the motion conversion mechanism 21, the striking element 23, and the rotation transmission mechanism 25). It may be formed or may be formed from one part. Further, the main body housing 11 may be formed as a one-layer housing, or an outer housing that forms an outline of the main body 10 and an inner housing that is disposed in the outer housing and accommodates an internal mechanism. May be. In this case, from the viewpoint of vibration isolation, the inner housing and the outer housing are preferably connected via an elastic element so as to be relatively movable.

  An intake port 15 is provided at a lower portion of the central region in the front-rear direction of the main body housing 11. The intake port 15 is a through hole that allows communication between the inside and the outside of the main body housing 11. Although details will be described later, the intake port 15 is provided so as to communicate with the exhaust port 311 of the dust collector 3 when the dust collector 3 is mounted on the hammer drill 1. The main body housing 11 is also provided with an exhaust port (not shown) for exhausting air flowing from the intake port 15. Further, an engagement hole 17 is provided on the front side of the air inlet 15 at the lower part of the central region in the front-rear direction of the main body housing 11. The engagement hole 17 is a hole recessed upward from the lower surface of the main body housing 11, and is configured such that an engagement piece 314 provided in the dust collector 3 can be engaged.

  In the present embodiment, an AC motor is employed as the motor 20 that functions as a drive source for the tip tool 19. As shown in FIG. 1, the motor 20 is arranged in the rear region of the main body housing 11 so that the axis of the output shaft 201 of the motor 20 is parallel to the axis of the tip tool 19 (that is, extends in the front-rear direction). Is arranged. A cooling fan 26 for cooling the motor 20 is fixed to the front end portion of the output shaft 201. On the front side of the cooling fan 26, a dust collecting fan 27 having a rotating shaft coaxially connected and fixed to the output shaft 201 is provided. The dust collection fan 27 is a fan for generating an air flow that sucks the dust generated in the processing operation by the tip tool 19 and guides it into the dust collector 3. The dust collection fan 27 is disposed above the intake port 15 described above. In the central region in the front-rear direction of the main body housing 11, on the front side of the dust collecting fan 27, a rotating shaft having a driving gear 205 at the front end is connected coaxially with the output shaft 201 and the rotating shaft of the dust collecting fan 27. ing. With this configuration, the cooling fan 26, the dust collection fan 27, and the drive gear 205 rotate integrally with the output shaft 201.

  The motion conversion mechanism 21, the striking element 23, and the rotation transmission mechanism 25 are disposed in the front region of the main body housing 11. The rotational power of the motor 20 is transmitted to the motion conversion mechanism 21 and the rotation transmission mechanism 25 via the drive gear 205. The motion conversion mechanism 21 is configured to convert the rotational motion of the rotating shaft that is rotationally driven in accordance with the rotation of the output shaft 201 into the linear motion of the piston when the swing ring swings. The striking element 23 is configured to apply a striking force in the axial direction of the tip tool 19 to the tip tool 19 in accordance with the linear motion of the piston. As the motor 20 is driven, the tip tool 19 is reciprocated linearly in the long axis direction of the tip tool 19 by the motion conversion mechanism 21 and the striking element 23. The rotation transmission mechanism 25 is composed of a plurality of gears, and is configured to transmit the rotational power of the motor 20 to the tip tool 19 through the tool holder 12 as the final shaft after appropriately reducing the rotational power. As the motor 20 is driven, the tip tool 19 is rotationally driven around the axis (in the circumferential direction) by the rotation transmission mechanism 25. In addition, since the motion conversion mechanism 21, the striking element 23, and the rotation transmission mechanism 25 are well-known techniques, further description here is abbreviate | omitted.

  The hammer drill 1 of the present embodiment is configured such that any one of three modes of a hammer drill mode, a drill mode, and a hammer mode can be selected by operating a mode change lever (not shown) provided in the main body portion 10. Yes. The hammer drill mode is a mode in which the tip tool 19 performs a hammer operation and a drill operation. The drill mode is a mode in which the tip tool 19 performs only a drill operation. The hammer mode is a mode in which the tip tool 19 performs only a hammer operation. Of these modes, the dust collector 3 of the present embodiment is particularly useful when the hammer drill 1 is operated in the hammer drill mode or the drill mode (that is, when a machining operation including a drilling operation is performed). is there. Since the configuration for mode switching is a well-known technique, description thereof is omitted here.

  The handle 13 is a long portion that extends downward from the rear end of the main body 10. The handle 13 includes a handle housing 131 that forms an outline of the handle 13, a power cable 133, and a trigger 135. The handle housing 131 is formed as a separate body from the main body housing 11 and may be coupled to the main body housing 11 or may be formed integrally with at least a part of the main body housing 11. In the hammer drill 1, vibration in the axial direction of the tip tool 19 mainly occurs. Therefore, the main body housing 11 and the handle housing 131 are connected via an elastic element so as to be relatively movable in at least the axial direction of the tip tool 19. And preferred.

  A power cable 133 for connecting to an external AC power source extends from the lower end of the handle housing 131. The trigger 135 is provided on the upper front side of the handle housing 131. A switch, a controller (both not shown) and the like are accommodated in the handle housing 131. A motor 20, a power cable 133, a switch, and the like are electrically connected to the controller. When the operator pulls the trigger 135, the switch is turned on, and the motor 20 is energized and driven. The motor 20 is driven and controlled by a controller.

  Hereinafter, with reference to FIG. 1, the whole structure of the dust collector 3 is demonstrated. In addition, since the dust collector 3 is used in a state of being mounted on the hammer drill 1, in the following description, for convenience, the direction of the dust collector 3 is matched with the direction of the hammer drill 1 when mounted on the hammer drill 1. Stipulate.

  As shown in FIG. 1, the dust collecting device 3 is connected to a main body portion 31 attached to the lower side of the main body portion 10 of the hammer drill 1 and a front end portion of the main body portion 31 so as to protrude forward of the main body portion 31. A suction portion 37 connected to the front end portion of the transfer portion 35, bent upward and extending; and a dust accommodating portion 39 disposed below the rear portion of the main body portion 31. When the motor 20 of the hammer drill 1 is driven, a suction force acts on the suction portion 37 through the inside of the main body portion 31, the accommodation portion 39, and the transfer portion 35 by the dust collecting fan 27 that rotates together with the output shaft 201. Dust generated by the processing operation is sucked from the suction portion 37 together with air by this suction force, and flows into the accommodating portion 39 through the transfer portion 35 and the main body portion 31. In the accommodating part 39, only dust is isolate | separated from air and accommodated. The air after the dust is removed flows into the main body housing 11 of the hammer drill 1 and is discharged from an exhaust port (not shown).

  Hereinafter, with reference to FIGS. 1-7, the detailed structure of the dust collector 3 is demonstrated. First, each structure of the main-body part 31, the transfer part 35, the suction part 37, and the accommodating part 39 is demonstrated with reference to FIGS. As shown in FIG. 1, the main body 31 is formed in an elongated shape slightly shorter than the main body 10 of the hammer drill 1, so that the major axis direction of the main body 31 coincides with the major axis direction of the main body 10 (that is, It is mounted on the lower side of the main body 10 so as to extend in the front-rear direction. The main body 31 includes a housing 310 that forms an outline of the main body 31, an intake connection portion 318 that transfers air containing dust to the inside of the housing portion 39, and air from which dust has been removed from the housing portion 39 to the main body portion. 31 is provided with an exhaust connection portion 319 for transferring to the outside of 31 (inside the main body housing 11 of the hammer drill 1), and an engagement mechanism 313 configured to be detachable from the main body portion 10.

  As shown in FIG. 1, the housing 310 is formed in a cylindrical shape at one end (front end) in the long axis direction (that is, the front-rear direction of the dust collector 3). This cylindrical portion of the housing 310 is referred to as a holding portion 320. The holding part 320 includes an opening 321 provided at the front end for communicating the inside and the outside of the housing 310 and a first passage 322 extending rearward from the opening 321 inside the housing 310. The transfer portion 35 is inserted into the first passage 322 so as to be slidable in the front-rear direction.

  As shown in FIG. 2, the shape of the cross section orthogonal to the front-rear direction of the holding portion 320 is generally rectangular. The holding part 320 is a part configured to hold the transfer part 35 so as to be movable relative to the main body part 31. Specifically, guide rails 325 to 327 that protrude toward the inside of the first passage 322 and extend in the front-rear direction are provided on the inner surface of the holding portion 320. Among these, the guide rail 325 extends in the front-rear direction at the center in the vertical direction of the right inner surface of the holding part 320. The guide rails 326 and 327 extend in the front-rear direction at the upper left portion and the lower left portion of the inner surface of the holding portion 320, respectively.

  Further, the holding unit 320 is provided with the lock mechanism 5. More specifically, the lock mechanism 5 is provided in the vicinity of the opening 321 on the left side of the holding unit 320. The detailed configuration of the lock mechanism 5 will be described later.

  A rectangular box-shaped accommodation part 39 is mounted on the lower rear side of the holding part 320 of the housing 310. In addition, although the accommodating part 39 of this embodiment is comprised so that attachment or detachment is possible with respect to the housing 310, description here is abbreviate | omitted about the structure for attachment / detachment. A filter 392 for separating dust from the air that has been transferred is held in the accommodating portion 39 in an exchangeable manner. The filter 392 is made of a material having air permeability such as paper or nonwoven fabric. The interior of the housing 310 and the interior of the accommodating portion 39 are communicated with each other through communication holes provided at two locations on the front and rear of the lower surface of the housing 310 and the upper surface of the accommodating portion 39.

  One end portion of the intake connection portion 318 is inserted through the front communication hole and protrudes into the housing portion 39. The intake connection portion 318 is a cylindrical member formed in an L shape. The other end portion of the intake connection portion 318 is disposed in the first passage 322 along the axial direction (that is, the front-rear direction) of the holding portion 320 so as to open forward. A flange-like end of the exhaust connection part 319 is fitted into the rear communication hole. The exhaust connection portion 319 is a cylindrical member that can be elastically deformed in the axial direction. The other end of the flange shape of the exhaust connection portion 319 is fitted into an exhaust port 311 provided on the upper surface of the housing 310. In other words, the exhaust connection part 319 allows the inside of the housing part 39 to communicate with the outside of the housing 310. The exhaust port 311 is provided at a position facing the intake port 15 of the main body housing 11 when the dust collector 3 is disposed at a predetermined position with respect to the hammer drill 1.

  The engagement mechanism 313 is provided as one of the configurations that allows the dust collector 3 to be attached to and detached from the hammer drill 1. The engagement mechanism 313 of this embodiment includes an engagement piece 314, an urging spring 315, and an operation unit 316. The engagement piece 314 is configured to be engageable with an engagement hole 17 provided on the lower surface of the main body housing 11 of the hammer drill 1, and protrudes upward from an opening provided on the upper surface of the housing 310. The biasing spring 315 is disposed inside the housing 310 and constantly biases the engagement piece 314 upward. The operation unit 316 is configured to move the engagement piece 314 downward by being pressed from the outside of the housing 310 and release the engagement between the engagement piece 314 and the engagement hole 17.

  Although not shown, in addition to the engagement hole 17 and the engagement mechanism 313, the main body housing 11 and the housing 310 can be engaged with a pair of guide grooves extending in the front-rear direction and the guide grooves. A slide mechanism comprising a pair of guide rails configured as described above is provided. One of the guide groove and the guide rail is provided in the main body housing 11, and the other is provided in the housing 310. When the dust collecting device 3 is slid in the front-rear direction with respect to the hammer drill 1 with the guide rail engaged with the guide groove and is disposed at a predetermined position, the engaging piece 314 engages with the engaging hole 17. . As a result, the slide mechanism restricts the relative movement of the main body housing 11 and the housing 310 in the vertical direction, and the engagement piece 314 and the engagement hole 17 restrict the relative movement of the main body housing 11 and the housing 310 in the front-rear direction. . Thereby, the dust collector 3 is attached to the hammer drill 1 in a stable posture. At this time, the flange-shaped end portion of the exhaust connection portion 319 protruding upward from the exhaust port 311 is pressed against the main body housing 11 around the intake port 15 from below, so that the inside of the housing portion 39 and the inside of the main body housing 11 Are communicated with each other via an exhaust connection portion 319.

  As shown in FIG. 1, the transfer part 35 is a linear cylindrical member. The transfer unit 35 is open at both ends in the axial direction, and has a second passage 352 extending in the axial direction inside. One end of the transfer unit 35 is inserted into the first passage 322 from the opening 321 of the holding unit 320 so that the second passage 352 and the first passage 322 of the holding unit 320 communicate with each other. That is, a part of the transfer part 35 is disposed inside the first passage 322 so that the axis thereof extends in the front-rear direction.

  As shown in FIG. 2, the outer diameter of the transfer unit 35 is formed to be slightly smaller than the inner diameter of the holding unit 320, and the shape of the cross section perpendicular to the axial direction of the transfer unit 35 is substantially the same as that of the holding unit 320. It is rectangular. The transfer unit 35 is held by the holding unit 320 so as to be movable relative to the main body unit 31 in the axial direction of the transfer unit 35. Specifically, a guide groove 355 that is recessed toward the inside in the radial direction extends in the front-rear direction on the right side of the transfer portion 35. A guide rail 325 of the holding part 320 is engaged with the guide groove 355. Further, an engaging portion 356 that protrudes to the left is provided on the left side of the transfer portion 35. The engaging portion 356 extends in the front-rear direction between the guide rails 326 and 327 in a state where the upper end portion and the lower end portion are in contact with the guide rails 326 and 327 of the holding portion 320. With this configuration, the transfer unit 35 is held so as to be slidable in the front-rear direction with respect to the holding unit 320 in a state where relative movement around the axis is restricted.

  Moreover, as shown in FIGS. 1-3, the transfer part 35 has the rack 358 extended in the axial direction of the transfer part 35 in the left outer surface. The rack 358 includes a plurality of protrusions arranged in a line in the axial direction of the transfer unit 35. Each protrusion is formed in a substantially elliptical shape when viewed from the left side. The distance between the protrusions adjacent in the axial direction (front-rear direction) of the transfer unit 35 is set to be shorter than the width (length in the front-rear direction) of the distal end portion 537 of the rotation portion 530 of the lock member 53 described later. (See FIG. 3). A locking piece 55 can be locked to the rack 358. The detailed configuration of the locking piece 55 will be described later.

  As shown in FIG. 1, the suction portion 37 is a cylindrical member formed in a substantially L shape, and has a third passage 372 inside. A suction hood 373 formed so as to cover the tip of the tip tool 19 is provided at one end of the suction portion 37. The suction hood 373 is provided with a suction port 375 through which the tip tool 19 can be inserted. The suction part 37 is connected to the front end part of the transfer part 35 so that the end part having the suction hood 373 is arranged upward. The other end of the suction portion 37 is inserted into the second passage 352 from the opening at the front end of the transfer portion 35 so that the third passage 372 and the second passage 352 of the transfer portion 35 communicate with each other. One end of a telescopic hose 353 with a coil spring 354 is connected to this end. The other end of the hose 353 is connected to one end of an intake connection 318 disposed in the first passage 322. That is, the hose 353 extends in the front-rear direction through the second passage 352 of the transfer portion 35 and the first passage 322 of the holding portion 320, and communicates the suction portion 37 and the intake connection portion 318. The transfer part 35 is urged forward by a coil spring 354 externally attached to the hose 353 in a direction protruding from the holding part 320 (opening 321) (hereinafter referred to as a protruding direction), that is, forward.

  Hereinafter, the configuration of the locking piece 55 configured to be locked to the rack 358 of the transfer unit 35 will be described with reference to FIG. 4. In addition, since the locking piece 55 is always engaged with the rack 358 of the transfer part 35, the direction of the locking piece 55 is prescribed | regulated according to the direction of the dust collector 3 in the following description.

  As shown in FIG. 4, the locking piece 55 is a member in which a base portion 551, an engaging portion 552, and a contact portion 556 are integrally formed. In the present embodiment, the locking piece 55 is made of resin. The base portion 551 is a portion formed in a generally rectangular block shape. The engaging portion 552 is provided on the upper portion of the right surface of the base portion 551 so as to protrude rightward. In the present embodiment, the engaging portion 552 is configured to be engageable with three of the plurality of protrusions constituting the rack 358, and has three engaging recesses formed in a shape corresponding to the protrusion of the rack 358. 553. The engaging recess 553 is opened on the lower side and the right side of the engaging portion 552. A protrusion 554 protruding forward is provided at the front lower end portion of the base portion 551. The lower end surface of the protrusion 554 is formed as an inclined surface 555 that is inclined upward in the forward direction (in the direction away from the base portion 551). The contact portion 556 is a portion that is formed in a generally rectangular block shape and protrudes leftward from the lower portion of the left surface of the base portion 551.

  Hereinafter, the detailed configuration of the lock mechanism 5 provided in the holding unit 320 will be described with reference to FIGS. 2 and 5 to 7. As shown in FIG. 5, the lock mechanism 5 includes an operation member 51 configured to be relatively movable with respect to the holding unit 320, and a lock member 53 provided on the operation member 51. Hereinafter, the operation member 51 and the lock member 53 will be described in order.

  As shown in FIG. 6, the operation member 51 includes a base portion 511, an opposing wall portion 520, and a partition wall portion 525. In the present embodiment, the operation member 51 is integrally formed of resin. The base portion 511 is formed in a substantially rectangular plate shape and has an outer surface 512 and an inner surface 513. The operation member 51 is mounted on the holding unit 320 such that the outer surface 512 is exposed to the outside through a through-hole 323 provided in the holding unit 320 and the longitudinal direction of the base unit 511 coincides with the vertical direction of the dust collector 3. Therefore, in the following description, the direction of the operation member 51 is defined in accordance with the direction of the dust collector 3.

  As shown in FIG. 2, a protrusion 5121 extending in the front-rear direction is provided at a substantially central portion in the vertical direction of the outer surface 512 of the base portion 511. The protrusion 5121 functions as a part where the operator puts his / her finger when moving the operation member 51 relative to the main body 31 in the vertical direction. As shown in FIG. 6, a groove 515 that is recessed from the inner surface 513 side toward the outer surface 512 side extends in the vertical direction (longitudinal direction) at the center portion in the front-rear direction (short direction) of the base portion 511. Is provided. A protrusion 516 that protrudes rightward from the bottom surface of the groove 515 is provided at the lower end of the groove 515. The protrusion 516 is inserted into one end of a coil spring 540, which will be described later, and is configured to support the coil spring 540 (see FIG. 5).

  Opposing wall portions 520 are provided along the groove portion 515 on both sides (front side and rear side) of the groove portion 515. The opposing wall portion 520 includes three pairs of wall portions that protrude from the inner surface 513 to the right in the vertical direction. Specifically, three pairs of wall portions of a lower wall portion 521, an intermediate wall portion 522, and an upper wall portion 523 are arranged in order from the lower end portion of the base portion 511 toward the upper end portion. The upper wall portion 523 and the intermediate wall portion 522 are integrally formed so that the intermediate wall portion 522 is thinner and lower than the upper wall portion 523. On the other hand, the lower wall portion 521 is disposed away from the intermediate wall portion 522 in the vertical direction (the extending direction of the groove portion 515). A gap between the intermediate wall portion 522 and the lower wall portion 521 is provided as a locking piece passage 526 through which the contact portion 556 of the locking piece 55 can pass.

  A pair of projecting portions 5211 and 5212 are provided on the upper end portion of the lower wall portion 521 so as to project in the direction away from the groove portion 515 (forward and backward). Similarly, a pair of projecting portions 5221 and 5222 that project in a direction away from the groove portion 515 (forward and backward) are also provided at the lower end portion of the intermediate wall portion 522. In other words, the protrusions 5211 and 5221 that protrude forward from the lower wall portion 521 and the intermediate wall portion 522 of the front side are arranged opposite to each other in parallel with the locking piece passage 526 interposed therebetween. Similarly, projecting portions 5212 and 5222 that protrude rearward from the lower wall portion 521 and the intermediate wall portion 522 on the rear side are also opposed to each other in parallel with the locking piece passage 526 interposed therebetween. The mutually opposing surfaces of the protrusions 5212 and 5222 are formed as inclined surfaces 5213 and 5223 that are inclined in a direction away from each other toward the rear.

  A pair of support holes 517 that support a support pin 518 (see FIG. 5) that supports a rotation unit 530 described later are provided at the lower end of the upper wall 523 so as not to rotate. On the upper side of the support hole 517 (opposite side of the intermediate wall part 522 with respect to the support hole 517), a partition wall part 525 that protrudes rightward in the vertical direction from the bottom surface of the groove part 515 and connects the upper wall part 523 in the front-rear direction. Is provided. A space formed between the opposing wall portions 520 sandwiching the groove portion 515 is divided into two in the vertical direction by a partition wall portion 525. The upper space defined by the partition wall portion 525 and the upper wall portion 523 is provided as a spring accommodating portion 527 in which a coil spring 57 (see FIG. 2) described later is accommodated. In addition, the opposing surface of the part (upper part from the partition part 525) which forms the spring accommodating part 527 among the upper wall parts 523 is formed as a curved surface which supports the coil spring 57 along the outer periphery of the coil spring 57. ing. A lower space defined by the partition wall portion 525, the lower portion of the upper wall portion 523, the intermediate wall portion 522, and the lower wall portion 521 is provided as a rotating portion accommodating portion 528 in which a rotating portion 530 described later is accommodated. It has been.

  As shown in FIG. 5, the lock member 53 is attached to the rotation portion 530 that is rotatably supported by the support pin 518 with respect to the operation member 51, and the rotation portion 530 toward the direction away from the base portion 511. And a coil spring 540 for energizing.

  As shown in FIG. 7, the rotating part 530 is a member in which a head part 531, an arm part 533, and a tip part 537 are integrally formed. In this embodiment, the rotation part 530 is formed of metal (for example, stainless steel, aluminum alloy, etc.). The head 531 is a portion formed in a substantially cylindrical shape, and has a through hole 532 through which the support pin 518 is inserted. The arm portion 533 extends from the head 531 curved in a U shape in a direction intersecting the axial direction of the through hole 532. The central portion (U-shaped protruding portion) of the arm portion 533 functions as a pressing portion 534 that abuts on the locking piece 55 and presses the locking piece 55. An inclined surface 535 is formed at the rear end portion of the inner side surface (right side surface) of the pressing portion 534 so that the thickness of the arm portion 533 decreases toward the rear. The tip 537 extends linearly from the end of the arm 533 opposite to the head 531 in a direction away from the head 531. The tip 537 has a protrusion 539 that protrudes in the same direction (leftward) as the central portion of the arm 533. The protrusion 539 is configured to be inserted into one end of the coil spring 540 to support the coil spring 540.

  As shown in FIG. 5, in the rotating portion 530, the head 531 is supported by the support pin 518 so as to be rotatable with respect to the operation member 51, and the protrusion 539 of the tip 537 and the protrusion 516 of the groove 515 are coil springs 540. Are accommodated in the rotating portion accommodating portion 528 in a state of being inserted into both end portions. The distal end portion 537 is biased in a direction away from the base portion 511 by the coil spring 540, and the pressing portion 534 of the arm portion 533 is disposed in the locking piece passage 526, and from the head portion 531 and the distal end portion 537. Is also held at a position close to the base portion 511. By attaching the lock member 53 to the operation member 51 in this way, the lock mechanism 5 as an assembly is formed.

  Next, with reference to FIG. 2 and FIG. 3, attachment to the holding | maintenance part 320 of the locking mechanism 5 is demonstrated. A rectangular through hole 323 that is long in the vertical direction is provided in the vicinity of the opening 321 of the holding part 320. The operation member 51 has a base portion 511 and an opposing wall portion 520 fitted in the through hole 323 and is held by the holding portion 320 so as to be slidable in the vertical direction with respect to the holding portion 320. That is, the operation member 51 can move relative to the holding unit 320 in a direction intersecting the axial direction and the radial direction of the transfer unit 35.

  In addition, the coil spring 57 is accommodated in the spring accommodating portion 527 of the operation member 51 in a state in which both end portions abut against the upper surface portion of the holding portion 320 and the partition wall portion 525 and are compressed in the vertical direction. The operation member 51 is normally biased downward by the coil spring 57 and is held at a position where the lower end portion of the lower wall portion 521 contacts the lower surface of the holding portion 320 (position shown in FIG. 2). This position is the lowest position within the vertical sliding range of the operation member 51, and is hereinafter referred to as a first operation position. On the other hand, when an upward force against the biasing force of the coil spring 57 is applied to the operation member 51 by the operator, the operation member 51 is moved upward according to the applied force. The In the present embodiment, the uppermost position in the vertical sliding range of the operation member 51 is the position when the coil spring 57 is compressed to the maximum by being sandwiched between the upper surface portion of the holding portion 320 and the partition wall portion 525. . Hereinafter, this position is referred to as a second operation position.

  Hereinafter, the relationship between the position of the locking piece 55 and the operation of the lock mechanism 5 will be described with reference to FIGS. 2, 3, and 8 to 10. As shown in FIG. 3, the locking piece 55 is disposed on the left side of the transfer unit 35, and at any time, any three of the plurality of protrusions of the rack 358 engage with the engaging recess 553, so that the rack 358. It is locked to. Therefore, when the transfer part 35 moves relative to the main body part 31 in the axial direction of the transfer part 35 (forward direction of the dust collector 3), the locking piece 55 locked to the rack 358 is also transferred together with the transfer part 35. It moves relative to the axial direction of the portion 35 (the front-rear direction of the dust collector 3).

  The operation member 51 and the lock member 53 are respectively in the axial direction of the transfer unit 35 (the front-rear direction of the dust collecting device 3) when the locking piece 55 is disposed at a predetermined operation position with respect to the operation member 51. It is configured to perform a different operation when it is not disposed (in other words, when it is disposed at a non-operation position other than the operation position). Here, in this embodiment, as shown in FIGS. 8 and 9, the operation position is such that the locking piece 55 is located between the operation member 51 and the transfer unit 35 in the radial direction (left-right direction) of the transfer unit 35. The position is set. More specifically, the operation position of this embodiment is such that the left surface of the base portion 551 of the locking piece 55 contacts the right surface (projecting end surface) of the intermediate wall portion 522, and the contact portion 556 is the locking piece of the operation member 51. The position is set in the passage 526 (see FIG. 5). Further, in the relationship with the rotating part 530, the locking piece 55 arranged at the operating position is sandwiched between the pressing part 534 arranged in the groove part 515 and the transfer part 35. With respect to the vertical direction, the locking piece 55 arranged at the operating position includes an upper end of the lower wall portion 521 and a tip portion 537 of the rotating portion 530, a lower end of the upper wall portion 523, and a head portion 531 of the rotating portion 530. It is sandwiched between.

  First, the operation of the lock member 53 and the operation member 51 when the locking piece 55 is not disposed at the operating position (that is, when it is disposed at the non-operating position other than the operating position) will be described. As shown in FIG. 2, when the locking piece 55 is not disposed at the operating position, the rotating portion 530 causes the tip portion 537 to approach the transfer portion 35 by the urging force of the coil spring 540 (clockwise in FIG. 2). And the tip 537 is held at a position where it abuts against a contact surface 329 provided inside the holding part 320. This position is a position (rightmost position) closest to the transfer unit 35 within the rotation range of the rotation unit 530, and is hereinafter referred to as a movement prohibition position.

  When the rotating part 530 is in the movement prohibition position, a part of the pressing part 534 protrudes from the groove part 515 to the right. The tip 537 is disposed below the rack 358 of the transfer unit 35 held in the first passage 322. In other words, the rack 358 is disposed on the moving path of the tip portion 537 that relatively moves upward together with the operation member 51. In the present embodiment, only a minute gap is provided between the tip 537 and the rack 358. Therefore, even if the operator tries to move the operation member 51 located at the lowermost position upward with respect to the holding portion 320, any projection of the rack 358 interferes with the tip end portion 537 and is substantially moved. I can't. As described above, the lock member 53 is configured to prohibit the relative movement of the operation member 51 with respect to the holding portion 320 when the locking piece 55 is not disposed at the operation position with respect to the operation member 51. Further, the rack 358 functions as an interference portion that interferes with the lock member 53 when the locking piece 55 is not disposed at the operating position with respect to the operation member 51.

  As shown in FIG. 3, when the locking piece 55 is not disposed at the operating position, the locking piece 55 does not interfere with the operation member 51 and the rotating portion 530, so that the transfer portion 35 is connected to the main body portion 31 ( It is possible to freely move relative to the holding unit 320) in the axial direction of the transfer unit 35 (the front-rear direction of the dust collector 3).

  Next, operations of the lock member 53 and the operation member 51 when the locking piece 55 is disposed at the operation position will be described. As shown in FIG. 8, when the locking piece 55 is disposed in the operating position, the locking piece 55 resists the biasing force of the coil spring 540 by the contact portion 556 coming into contact with the pressing portion 534. Thus, the rotating portion 530 is rotated in a direction (counterclockwise direction in FIG. 8) in which the distal end portion 537 is separated from the transfer portion 35 (contact surface 329), and the pressing portion 534 is accommodated in the groove portion 515. Hold. This position is the position (leftmost position) farthest from the transfer section 35 within the rotation range of the rotation section 530, and is hereinafter referred to as a movement allowable position.

  When the rotation part 530 is in the movement allowable position, the tip part 537 is disposed on the lower left side with respect to the rack 358 of the transfer part 35 held in the first passage 322. That is, the front end portion 537 is not disposed at a position overlapping the rack 358 when viewed from above. In other words, the rack 358 is not disposed on the moving path of the tip portion 537 that relatively moves upward together with the operation member 51. Therefore, when the operator tries to move the operation member 51 at the first operation position in the upward direction with respect to the holding unit 320, any protrusion of the rack 358 does not interfere with the tip portion 537. . Therefore, as shown in FIG. 10, the operation member 51 is slid upward with respect to the holding portion 320 against the urging force of the coil spring 57. Thus, the lock member 53 is configured to allow relative movement of the operation member 51 with respect to the holding portion 320 when the locking piece 55 is disposed at the operation position with respect to the operation member 51.

  As described above, the operation member 51 is always held at the first operation position by the biasing force of the coil spring 57 as shown in FIG. At this time, the locking piece 55 is disposed at a locking position locked to the rack 358. The rotation portion 530 of the lock member 53 transfers the locking piece 55 arranged at the locking position by the biasing force of the coil spring 540 compressed between the base portion 511 and the tip end portion 537 of the operation member 51. Press against part 35.

Further, as described above, the transfer unit 35 is urged in the protruding direction (forward) by the coil spring 354 externally mounted on the hose 353. On the other hand, as shown in FIG. 9, in the axial direction (front-rear direction) of the transfer unit 35, the holding unit 320 to the transfer unit 35 are located on the opening 321 side (projection direction side) with respect to the operating position of the locking piece 55. A projecting portion 328 projecting toward is provided. The protrusion 328 is a protrusion prohibition that prohibits the transfer part 35 from moving relative to the holding part 320 in the protrusion direction when the locking piece 55 is disposed at the operating position and is disposed at the locking position. It is configured as a part. More specifically, the protruding portion 328 is formed when the locking piece 55 is disposed at the operating position and the locking member 55 is disposed at the locking position by the operation member 51 being disposed at the first operation position. In addition, the abutting force of the coil spring 354 causes the transfer unit 35 to protrude with respect to the holding unit 320 by contacting the locking piece 55 (specifically, the front lower end portion of the locking piece 55) from the opening 321 side. It is prohibited to move relative to On the other hand, in the axial direction (front-rear direction) of the transfer portion 35, a member that interferes with the locking piece 55, such as the protruding portion 328, is provided on the opposite side of the opening 321 with respect to the operating position of the locking piece 55. It is not done. Therefore, for example, when the suction hood 373 is pressed against the workpiece during the processing operation in a state where the locking piece 55 is disposed at the operating position and is disposed at the locking position, or the operator's operation Thus, when the transfer part 35 is moved in the direction of retracting the holding part 320 against the biasing force of the coil spring 540 (hereinafter referred to as the retracting direction), that is, rearward, the locking piece 55 is locked to the rack 358. As it is, it moves from the operating position to another position in the axial direction (the contact portion 556 comes out of the locking piece passage 526). In this case, the rotation unit 530 rotates from the movement allowable position to the movement prohibited position by the biasing force of the coil spring 540.

  Further, as described above, when the locking piece 55 is disposed at the operating position with respect to the operation member 51, the lower wall portion 521 and the distal end portion 537, the upper wall portion 523, and the head portion 531 in the vertical direction. (See FIG. 5). Therefore, when the operation member 51 and the lock member 53 are relatively moved in the vertical direction with respect to the holding portion 320, the locking piece 55 is also moved in the vertical direction together with the operation member 51 and the lock member 53. When the operation member 51 is moved from the first operation position to the second operation position, the protrusion of the rack 358 is detached from the engagement recess 553 of the engagement piece 55. That is, the locking piece 55 is released from the locking position (see FIG. 8) locked to the rack 358 from the locking position locked to the rack 358 as the operation member 51 and the locking member 53 move relative to each other. (See FIG. 10). Thereby, even when the transfer unit 35 is moved in the axial direction (front-rear direction) with respect to the holding unit 320, the locking piece 55 is held at the release position and does not move relative to the transfer unit 35. As described above, the operation member 51 is moved relative to the second operation position from the first operation position when the locking piece 55 is disposed at the predetermined operation position with respect to the operation member 51, thereby The engagement of the engagement piece 55 with respect to 358 is released, and the engagement piece 55 is prohibited from moving together with the transfer portion 35 in the axial direction.

  Further, as shown in FIG. 10, when the locking piece 55 is arranged at the release position, the prohibition of relative movement in the protruding direction (forward) with respect to the main body portion 31 (holding portion 320) of the transfer portion 35 is released. Therefore, the transfer unit 35 can move relative to the holding unit 320 in the axial direction (front-rear direction) both in the protruding direction (front) and in the retracting direction (rear).

  When the operation member 51 is moved to the first operation position from the state where the operation member 51 is disposed at the second operation position and the engagement piece 55 is disposed at the release position (see FIG. 10), the engagement piece 55 is also moved. It moves downward with respect to the holding part 320 and the transfer part 35 together with the operation member 51 and the lock member 53. And the locking piece 55 is arrange | positioned in the locking position locked by the rack 358 (refer FIG. 8). As a result, the protrusion 328 prohibits relative movement of the transfer part 35 in the protrusion direction (forward) with respect to the holding part 320. As described above, the operation member 51 is moved from the second operation position to the first operation position on the condition that the locking piece 55 is disposed at the operation position in the axial direction of the transfer unit 35, thereby The stop piece 55 is locked to the rack 358 so that the transfer unit 35 is prohibited from moving relative to the holding unit 320 in the protruding direction.

  When the dust collector 3 configured as described above is mounted on the hammer drill 1 to perform a machining operation, the operator performs the following procedure to position the transfer unit 35 with respect to the main body 31 (transfer from the opening 321). The amount of protrusion of the portion 35) can be adjusted.

  At the start of the machining operation, the locking piece 55 locked to one of the protrusions of the rack 358 is disposed at the operating position with respect to the operation member 51. This is because the transfer unit 35 is pushed into the first passage 322 of the holding unit 320 during the previous machining operation, and the locking piece 55 is disposed inside (rearward) the holding unit 320 rather than the operating position (FIG. 3). This is because when the machining operation is completed, the transfer portion 35 is biased in the protruding direction by the coil spring 354 and returns to the position where the locking piece 55 is disposed at the operating position. When the locking piece 55 moves to the operating position, the rotating portion 530 in the movement prohibiting position is rotated to the movement allowable position against the urging force of the coil spring 540, and the rotating portion 530 and the transfer portion are rotated. 35. As described above, when the locking piece 55 is relatively moved from the rear toward the front toward the operating position by the inclined surface 535 formed at the rear end portion on the inner side (right side) of the pressing portion 534, the rotating portion 530 is provided. The operation of rotating the rotating part 530 in contact with the rotating part 530 and arranging the rotating part 530 between the rotating part 530 and the transfer part 35 is smoothly realized.

  Further, as described above, the inclined surfaces 5213 and 5223 are formed on the opposing surfaces of the projecting portions 5212 and 5222 that protrude rearward from the rear lower wall portion 521 and the intermediate wall portion 522 with the locking piece passage 526 interposed therebetween. (See FIG. 6). Moreover, the inclined surface 555 is formed in the lower end surface of the protrusion 554 which protrudes ahead from the front lower end part of the base part 551 of the latching piece 55 (refer FIG. 4). By these inclined surfaces 5213, 5223, and 555, the locking piece 55 moves smoothly to the operating position without interfering with the protrusions 5212 and 5222 when relatively moving from the rear to the front toward the operating position. Can do.

  The operator holds the transfer part 35 with one hand and the operation member 51 from the first operation position to the second while holding the holding part 320 with the other hand in a state where the locking piece 55 is disposed at the operating position. Move to the operation position (see FIG. 10). As a result, the locking piece 55 is moved from the locking position locked to the rack 358 to the release position above the rack 358. The operator slides the transfer unit 35 in the front-rear direction with respect to the holding unit 320 in a state where the operation member 51 is maintained at the second operation position, and from the opening 321 according to the length of the tip tool 19. The amount of protrusion of the transfer part 35 is adjusted appropriately. At this time, the locking piece 55 is held at the release position by the operation member 51 and the lock member 53 and is not allowed to move together with the transfer portion 35. Move back and forth.

  After adjusting the protrusion amount of the transfer part 35, the operator returns the operation member 51 from the second operation position to the first operation position (see FIG. 8). As a result, the locking piece 55 is moved from the release position above the rack 358 to the locking position locked to the rack 358. At this time, the locking piece 55 is locked to the rack 358 on the rack 358 extending in the axial direction of the transfer section 35 at a position different from that when the operator starts the position adjustment. That is, the locking piece 55 is locked to a projection different from the projection that was initially locked among the plurality of projections constituting the rack 358. Further, the projecting portion 328 abuts against the locking piece 55 from the front, so that the transfer portion 35 is prohibited from moving in the projecting direction with respect to the holding portion 320 by the biasing force of the coil spring 354. Therefore, even if the worker releases the holding of the transfer unit 35, the transfer unit 35 and the suction unit 37 are maintained in that position. In this way, the operator can start a desired machining operation in a state where the position of the transfer unit 35 with respect to the main body 31 is appropriately set according to the length of the tip tool 19.

  By the way, an operator may not know the above procedure or may mistakenly adjust the position of the transfer unit 35 with respect to the main body 31. Specifically, it is assumed that the protrusion of the transfer portion 35 from the opening 321 is adjusted to a desired amount and the operation member 51 is to be operated without disposing the locking piece 55 at the operating position. . However, according to the dust collector 3 of the present embodiment, when the locking piece 55 is not disposed at the operating position, the lock member 53 (more specifically, the tip 537 of the rotating portion 530) interferes with the rack 358. By doing so, the operation member 51 is prohibited from being moved from the first operation position to the second operation position. That is, the operator cannot try to move the operation member 51 to the second operation position. Therefore, the operator can immediately notice that he / she has made a mistake and can correct the procedure.

  As described above, the dust collector 3 of the present embodiment is configured to be attachable to and detachable from the hammer drill 1 that drives the tip tool 19 and performs a machining operation on the workpiece. The dust collector 3 includes a main body portion 31, a transfer portion 35, a locking piece 55, an operation member 51, and a lock member 53. The transfer unit 35 is held by the holding unit 320 in a state in which the transfer unit 35 can move relative to the main body unit 31 in the front-rear direction (the axial direction of the transfer unit 35) and is biased in the protruding direction. A rack 358 is formed of a plurality of protrusions arranged in a line in the front-rear direction (the axial direction of the transfer unit 35). The locking piece 55 is configured to be movable relative to the main body 31 in the front-rear direction together with the transfer unit 35 while being locked to the protrusion of the rack 358.

  The operation member 51 provided in the holding unit 320 is configured to be relatively movable between the first operation position and the second operation position with respect to the main body unit 31 in accordance with a manual operation from the outside. The operation member 51 is relatively moved from the first operation position to the second operation position on the condition that the locking piece 55 is disposed at a predetermined operation position with respect to the operation member 51 in the front-rear direction. The latching piece 55 is unlocked from the rack 358, and the latching piece 55 is prohibited from moving in the front-rear direction together with the transfer portion 35. Further, the operation member 51 is moved from the second operation position to the first operation position on the condition that the engagement piece 55 is disposed at the operation position, so that the engagement piece 55 is engaged with the rack 358. Thus, the relative movement in the protruding direction of the transfer part 35 is prohibited. The lock member 53 provided on the operation member 51 allows the relative movement of the operation member 51 with respect to the main body 31 when the locking piece 55 is disposed at the operating position, while the locking piece 55 is disposed at the operating position. When not, the relative movement of the operation member 51 with respect to the main body 31 is prohibited.

  With this configuration, as described above, even if the operator makes a mistake in the procedure for adjusting the position of the transfer unit 35 with respect to the main body 31 (the amount of protrusion of the transfer unit 35 from the opening 321), the operator immediately makes an error. Can be noticed. From this point of view, the lock member 53 prohibits relative movement of the operation member 51 relative to the main body 31 when the locking piece 55 is not disposed at the operating position with respect to the main body 31 in the axial direction of the transfer portion 35. By doing so, it can be said that it is comprised as an alerting | reporting mechanism which alert | reports that the latching piece 55 is not arrange | positioned in an operation position. Thus, according to the dust collector 3 of this embodiment, the operability when adjusting the position of the transfer unit 35 relative to the main body 31 (the amount of protrusion of the transfer unit 35 from the opening 321) can be improved. it can.

  Further, in the present embodiment, the lock member 53 (specifically, the rotation portion 530) moves relative to the main body portion 31 in the same direction as the operation member 51 in accordance with the relative movement of the operation member 51. The locking piece moving member configured to move the locking piece 55 between the locking position where the locking piece 55 is locked to the rack 358 and the release position where the locking is released is also used. That is, the lock member 53 provided on the operation member 51 functions as a movement prohibition member of the operation member 51 that prohibits relative movement of the operation member 51 when the engagement piece 55 is not disposed at the operation position. When the piece 55 is disposed at the operating position, it also functions as a moving member for the locking piece 55 that moves relative to the operating member 51 to move the locking piece 55 between the locking position and the release position. Therefore, compared with the case where the movement prohibiting member of the operation member 51 and the moving member of the locking piece 55 are configured as separate members, the above two functions can be achieved with a simpler and more compact configuration.

  In the present embodiment, the operation member 51 is configured to be relatively movable with respect to the main body 31 in the vertical direction intersecting with the front-rear direction that is the axial direction of the transfer unit 35. Therefore, the arrangement direction of the plurality of protrusions of the rack 358 and the operation direction of the operation member 51 for locking the locking piece 55 to the rack 358 or releasing the locking intersect each other. Compared with the case where the arrangement direction and the operation direction of the operation member 51 are the same direction, the locking piece 55 can be locked or released with a simpler configuration. In addition, the operator can reliably perform the respective operations. Furthermore, in the present embodiment, the relative movement direction of the operation member 51 intersects with the radial direction of the transfer unit 35. That is, the operation member 51 is not relatively movable in the radial direction of the transfer unit 35. Therefore, since the operator does not perform an operation of pushing the operation member 51 inward in the radial direction of the transfer unit 35, it is avoided that a finger is caught between the through hole 323 of the holding unit 320 and the operation member 51. Can do.

  In the present embodiment, the lock member 53 (specifically, the rotating portion 530) interferes with any one of the protrusions that constitute the rack 358 of the transfer portion 35 when the locking piece 55 is not disposed at the operating position. Thus, the relative movement of the operation member 51 with respect to the main body 31 is prohibited. By using the rack 358 for locking the locking piece 55 as an interference part with the lock member 53 (specifically, the rotation part 530), the lock member 53 is not provided separately in the rack 358. The movement prohibition function of the operation member 51 can be realized.

  The lock member 53 according to the present embodiment includes a rotation unit 530 that is rotatably supported by the operation member 51, and a coil spring 540 that is provided on the operation member 51 and biases the rotation unit 530 toward the transfer unit 35. Including. Then, the rotation unit 530 has a movement allowable position where the interference unit (rack 358) does not intervene on the movement path when moving relative to the main body unit 31 together with the operation member 51, and an interference unit intervenes on the movement path. It is configured to be rotatable between a movement prohibition position. Further, the rotating portion 530 is configured to be disposed at the movement allowable position when the locking piece 55 is disposed at the operating position, and to be disposed at the movement prohibiting position when the locking piece is not disposed at the operating position. Has been. Therefore, it is possible to easily switch between permitting and prohibiting the relative movement of the operation member 51 by the rotation operation between the movement allowable position and the movement prohibition position of the rotation unit 530.

  The locking piece 55 of the present embodiment abuts against the rotating portion 530 and resists the urging force of the coil spring 540 when moving relative to the operating position from the position different from the operating position in the front-rear direction. Then, it is configured to be rotated from the movement prohibition position to the movement allowable position and disposed between the rotation unit 530 and the transfer unit 35. An inclined surface 535 that is inclined rearward is formed on the pressing portion 534 that contacts the locking piece 55. By the inclined surface 535, the operation when the locking piece 55 is relatively moved to the operating position can be smoothly realized.

  The rotating part 530 of this embodiment is made of metal having higher rigidity and higher durability than resin. Therefore, the rotation unit 530 can reliably perform the function of prohibiting the movement of the operation member 51 without bending.

  The above embodiment is merely an example, and the dust collector and the work tool according to the present invention are not limited to the configurations of the dust collector 3 and the hammer drill 1 illustrated. For example, the changes exemplified below can be added. Note that only one or a plurality of these changes can be adopted in combination with the dust collector 3 and the hammer drill 1 shown in the embodiment or the invention described in the claims.

  The dust collector 3 may be applied to a work tool other than the hammer drill 1. Specifically, the present invention can be applied to a work tool in which it is desirable to adjust the position of the transfer unit 35 with respect to the main body 31 according to the length of the tip tool 19. Examples of such work tools include work tools (vibrating drills, electric drills, etc.) for performing drilling work.

  Moreover, the structure which makes the dust collector 3 detachable with respect to the hammer drill 1 or another work tool is not restricted to the engagement mechanism 313 and the slide mechanism exemplified in the above embodiment. For example, an engagement mechanism composed of a combination of a hook and an engagement hole can be employed. The same change can be applied to the attachment / detachment configuration provided on the hammer drill 1 or other work tool corresponding to the dust collector 3. In addition, the configuration in which the dust collector 3 is attachable to and detachable from the hammer drill 1 or other work tool is not necessarily provided in the main body 31 of the dust collector 3, and is a dust collector different from the main body 31. 3 may be provided in one part, or may be provided separately from the dust collector 3. For example, the dust collector 3 may be mounted on the tool body of the hammer drill 1 or other work tool using a belt with a fastener or an annular member formed of a flexible material such as rubber.

  In the dust collecting device 3, the sucked dust is transferred to the accommodating portion 39 through the third passage 372 of the suction portion 37, the second passage 352 of the transfer portion 35, and the first passage 322 of the main body portion 31. The transfer path may be partially changed. For example, the transfer unit 35 may have a suction port, and dust may be transferred only through the second passage 352 and the first passage 322. Further, the first passage 322 may be connected to the accommodating portion 39 via another passage. A configuration may be adopted in which dust is directly transferred through these passages without using the hose 353. In this case, the transfer part 35 should just be urged | biased in the direction which protrudes from the holding | maintenance part 320 by the urging | biasing part (coil spring etc.) provided separately.

  The storage unit 39 that stores the sucked dust is not limited to a configuration that can be attached to and detached from the dust collector 3, and may be provided integrally with the main body 31 of the dust collector 3. It may be a separate body connected via The configuration for generating the suction force for sucking the dust does not necessarily need to be provided in the hammer drill 1. The dust collection device 3 may be provided with a dust collection fan 27 and a dedicated motor that drives the dust collection fan 27. A compressor may be connected to the dust collector 3.

  The transfer part 35 and the holding | maintenance part 320 should just be formed in the hollow cylinder shape, and the cross-sectional shape orthogonal to an axial direction is not restricted to the rectangular shape illustrated by embodiment. You may form in the cylinder shape which has polygonal cross-sectional shape other than circular, an ellipse, and a rectangle.

  In the above embodiment, the locking piece 55 is configured to be locked to three of the protrusions constituting the rack 358. In order to more reliably inhibit the relative movement in the protruding direction of the transfer unit 35 with respect to the main body 31, the locking piece 55 is preferably configured to be locked to a plurality of protrusions. It may be configured to be locked. Further, the shape of the protrusion and the engagement recess 553 of the locking piece 55 can be changed as appropriate.

  In the above embodiment, the lock member 53 (specifically, the rotating portion 530) serves as both the movement prohibiting member of the operation member 51 and the moving member of the locking piece 55, but the lock member 53 moves the operation member 51. It functions only as a prohibiting member, and the function as the moving member of the locking piece 55 may be achieved by another member. For example, when the locking piece 55 is in the operating position, the locking piece 55 may be sandwiched in the vertical direction only by the operation member 51 and relatively moved between the locking position and the release position.

  As described in the above embodiment, the relative movement direction of the operation member 51 with respect to the main body 31 is preferably a direction that intersects the axial direction and the radial direction of the transfer unit 35 from the viewpoint of operability. However, the relative movement direction of the operation member 51 may be a direction that intersects only the axial direction of the transfer unit 35, and the axial direction of the transfer unit 35 is not excluded.

  In the above-described embodiment, the protrusions constituting the rack 358 interfere with the lock member 53 (specifically, the rotating portion 530) when the locking piece 55 is not disposed at the operating position, so that the operation member 51 It also functions as an interference unit that prohibits relative movement. However, the transfer unit 35 may be provided with an interference unit separate from the rack 358. For example, when the locking piece 55 is not disposed at the operating position along the front-rear direction (the axial direction of the transfer unit 35) below the rack 358, it interferes with the tip 537 of the rotating unit 530. A ridge may be provided.

  The lock member 53 allows the relative movement of the operation member 51 when the locking piece 55 is arranged at the operating position, and prohibits the relative movement of the operating member 51 when the locking piece 55 is not arranged at the operating position. Any configuration may be used. From this point of view, the lock member 53 has a movement allowable position where no interference part is present on the movement path when moving relative to the main body 31 together with the operation member 51, and a movement prohibition position where the interference part is interposed on the movement path. And when the locking piece 55 is disposed at the operating position, it is disposed at the movement allowable position. When the locking piece 55 is not disposed at the operating position, it is disposed at the movement prohibiting position. What is necessary is just to be comprised so that. In this case, the lock member 53 is held by the operation member 51 so as to be slidable in the left-right direction (the radial direction of the transfer unit 35), for example, in addition to the rotation unit 530 and the coil spring 540 of the above embodiment. The slidable portion and the urging portion that urges the slidable portion toward the transfer portion 35 can be configured. Then, as the locking piece 55 moves relative to the operation member 51 in the front-rear direction (the axial direction of the transfer unit 35) between the operating position and the other positions, the movement prohibited position and the movement allowable position. It is only necessary to slide between the two.

  From the viewpoint of smoothing the operation when the locking piece 55 relatively moves from the position different from the operation position to the operation position, it is preferable that the inclined surface 535 is provided on the rear end side of the pressing portion 534. The inclined surface 535 is not necessarily provided. Further, a similar inclined surface may be provided on the rear end side of the surface of the contact portion 556 that contacts the pressing portion 534.

  The lock member 53 is preferably made of metal, but may be formed of other materials such as resin.

  In the dust collector 3 of the above-described embodiment, when the locking piece 55 is disposed at the operating position in the axial direction of the transport unit 35 and is disposed at the latch position where the latch piece 358 is locked, the transport unit 35 is A protrusion prohibiting portion configured to prohibit relative movement in a direction protruding from the opening 321 is provided. As a specific configuration example, a protrusion 328 is cited. The protruding portion 328 is provided on the opening 321 side with respect to the operating position of the locking piece 55 in the axial direction of the transfer portion 35, and protrudes from the main body portion 31 toward the transfer portion 35. The projecting portion 328 makes relative movement in the projecting direction of the transfer portion 35 by contacting the retaining piece 55 on the condition that the retaining piece 55 is disposed at the operating position and is disposed at the retaining position. Ban. However, the protrusion prohibition portion is not limited to the example of the protrusion 328. For example, provided that the operating member 51 is provided on the opening 321 side with respect to the operating position in the axial direction of the transfer section 35, the locking piece 55 is disposed at the operating position, and is disposed at the locking position. As an example, a protrusion that prohibits relative movement of the transfer part 35 in the protrusion direction by contacting the locking piece 55 may be provided.

  The correspondence between each component of the above embodiment and each component of the present invention is shown below. The dust collector 3 is a configuration example corresponding to the “dust collector” of the present invention. The main body 31, the opening 321 and the first passage 322 are configuration examples corresponding to the “main body”, “opening” and “first passage” of the present invention, respectively. The plurality of protrusions constituting the transfer portion 35, the second passage 352, and the rack 358 are configuration examples corresponding to the “tubular member”, the “second passage”, and the “plurality of protrusions” of the present invention, respectively. The locking piece 55 is a structural example corresponding to the “locking piece” of the present invention. The operation member 51 is a configuration example corresponding to the “operation member” of the present invention. The lock member 53 is a configuration example corresponding to the “lock member” and “locking piece moving member” of the present invention. The rotating unit 530 and the coil spring 540 are configuration examples corresponding to the “rotating unit” and the “urging unit” of the present invention, respectively. Each protrusion of the rack 358 is a configuration example corresponding to the “interference part” of the present invention. The inclined surface 535 is a configuration example corresponding to the “inclined portion” of the present invention. The hammer drill 1 and the main body 10 are configuration examples corresponding to the “work tool” and “tool main body” of the present invention.

DESCRIPTION OF SYMBOLS 1 Hammer drill 10 Main body part 11 Main body housing 12 Tool holder 13 Handle 131 Handle housing 133 Power cable 135 Trigger 15 Intake port 17 Engagement hole 19 Tip tool 20 Motor 27 Dust collecting fan 3 Dust collector 31 Main body part 310 Housing 311 Exhaust port 313 Engagement mechanism 314 Engagement piece 315 Energizing spring 316 Operation part 318 Intake connection part 319 Exhaust connection part 320 Holding part 321 Opening part 322 First passage 323 Through hole 325, 326, 327 Guide rail 328 Protrusion part 329 Contact surface 35 Transfer portion 352 Second passage 353 Hose 354 Coil spring 355 Guide groove 356 Engagement portion 358 Rack 37 Suction portion 372 Third passage 373 Suction hood 374 Suction port 39 Storage portion 392 Filter 51 Operation member 511 Base portion 515 Groove portion 516 Protrusion 5 8 Support Pin 520 Opposite Wall 521 Lower Wall 522 Intermediate Wall 523 Upper Wall 525 Partition 526 Locking Piece Path 527 Spring Housing 528 Rotating Portion Storage Portion 53 Lock Member 530 Rotation Portion 531 Head 533 Arm 534 Pressing part 535 Inclined surface 537 Tip part 539 Protrusion 540 Coil spring 55 Locking piece 551 Base part 552 Engaging part 553 Engaging recess 556 Abutting part 57 Coil spring

Claims (8)

A dust collector configured to be attachable to and detachable from a work tool that drives a tip tool to perform a machining operation on a workpiece,
A main body having an opening that opens to the outside, and a first passage that is connected to the opening and through which dust generated in the processing operation is transferred;
A cylindrical member having a second passage through which the dust is transferred, and having one end inserted into the opening so that the first passage and the second passage communicate with each other, A cylindrical shape that is relatively movable in the axial direction and is held by the main body in a state of being biased in a direction protruding from the opening, and has a plurality of protrusions arranged in a row in the axial direction on the outer surface Members,
A locking piece configured to be movable relative to the main body together with the cylindrical member in a state of being locked to at least one of the plurality of protrusions;
An operation member provided on the main body and configured to be movable relative to the main body between a first operation position and a second operation position in response to a manual operation from the outside of the main body;
A locking member provided on the operation member,
The operation member is relatively moved from the first operation position to the second operation position on the condition that the locking piece is disposed at a predetermined operation position with respect to the operation member in the axial direction. Thus, the engagement of the locking pieces with respect to the plurality of protrusions is released, and the locking pieces are configured to prohibit relative movement in the axial direction together with the cylindrical member,
The operation member is moved from the second operation position to the first operation position on the condition that the engagement piece is disposed at the operation position in the axial direction, so that the engagement piece is It is configured to be engaged with at least one of the plurality of protrusions and prohibit the relative movement of the tubular member in a direction protruding from the opening,
The locking member allows relative movement of the operation member with respect to the main body when the locking piece is disposed at the operating position in the axial direction, while the locking piece is not disposed at the operating position. A dust collector configured to prohibit relative movement of the operation member with respect to the main body. It is a dust collector of Claim 1, Comprising:
The lock member is moved relative to the main body in the same direction as the operation member with the relative movement of the operation member, thereby locking the locking piece to at least one of the plurality of protrusions. A dust collecting apparatus, which also serves as a locking piece moving member configured to move between a locking position and a release position where the locking of the plurality of protrusions is released. The dust collector according to claim 1 or 2,
The dust collector according to claim 1, wherein the operation member is configured to be relatively movable with respect to the main body in a direction intersecting the axial direction of the cylindrical member. It is a dust collector as described in any one of Claims 1-3,
The lock member prohibits relative movement of the operation member with respect to the main body by interfering with an interference portion provided in the cylindrical member when the locking piece is not disposed at the operating position. A dust collector characterized by comprising. It is a dust collector of Claim 4, Comprising:
The lock member includes a rotation portion that is rotatably supported by the operation member, and a biasing portion that is provided in the operation member and biases the rotation portion toward the cylindrical member,
The rotation unit includes a movement allowable position where the interference unit does not intervene on a movement path when moving relative to the main body together with the operation member, and a movement prohibition position where the interference unit intervenes on the movement path. It is configured to be rotatable between
The rotating portion is disposed at the movement allowable position when the locking piece is disposed at the operating position, and is disposed at the movement prohibiting position when the locking piece is not disposed at the operating position. It is comprised so that the dust collector characterized by the above-mentioned. It is a dust collector of Claim 5, Comprising:
When the locking piece relatively moves in the axial direction from a position different from the operating position to the operating position, the locking piece abuts on the rotating part and moves the rotating part against the biasing force. It is configured to rotate from the prohibition position to the movement allowable position, and is arranged between the rotation portion and the cylindrical member,
An inclined portion that is inclined in the axial direction is formed in at least one of a contact portion of the rotating portion with the locking piece and a contact portion of the locking piece with the rotating portion. A dust collector characterized by that. It is a dust collector as described in any one of Claims 1-6,
The dust collecting apparatus, wherein the lock member is made of metal. A work tool that drives a tip tool to perform a machining operation on a workpiece,
A tool body;
The work tool provided with the dust collector as described in any one of Claims 1-7 detachably mounted | worn with the said tool main body.

Images