JP2017030125A - Power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power tool facilitating an attaching/detaching work of a blade body unit to/from a body section.SOLUTION: A power tool 10 includes: a body section 11 for storing a motor 12; and a blade body unit 21 which has a blade body tool 22 which is operated by receiving driving force from the motor 12. The body section 11 has a drive gear 14a formed at a shaft tip of a motor shaft 14 provided in the motor 12. The blade body unit 21 has a driven gear 24a engaged with the drive gear 14a and a blade body tool 22 which is operated according to a rotary motion of the driven shaft 24 on which the driven gear 24a is mounted. The blade body unit 21 is attached/detached to/from the body section 11 in an engaging section of the drive gear 14a disposed in the body section 11 and the driven gear 24a disposed in the blade body unit 21. Furthermore, when the blade body unit 21 is mounted in the body section 11, the driven shaft 24 is disposed offset from the motor shaft 14.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electric power tool, and in particular, a main body that houses a motor as a driving source and a blade unit having a blade tool that operates by receiving driving force from the motor are detachably configured. It relates to a power tool.

  2. Description of the Related Art Conventionally, there are known electric tools that can perform various operations by transmitting a driving force of a motor as a driving source to a blade tool. There are various types of power tools of this type, such as reciprocating saws, hedge trimmers, clippers, etc., depending on the application. However, when using a conventional power tool as a dedicated machine having only a single function, it is necessary to prepare a plurality of types of power tools in order to perform a plurality of types of work, which is uneconomical for the user. . In addition, in the prior art, an electric tool that can be used for a plurality of operations by exchanging the blade tool has been proposed (for example, see Patent Document 1 below). The tool change operation was not easy and had the disadvantage that it could not be easily assembled.

  Therefore, in order to eliminate these disadvantages of the prior art, in Patent Document 2 below, a power tool (hand-held power cutting tool) that can be easily attached to and detached from the main body and can be easily changed in usage. Has been proposed. The electric power tool (hand-held electric cutting tool) according to Patent Document 2 includes a main body provided with a rotation driving means and a blade unit that is detachable from the main body, and is detachable from the main body. The blade unit includes a pair of upper and lower blade bodies of an upper blade body and a lower blade body, and a longitudinal direction necessary for a cutting operation by rotation of an eccentric cam that engages a base portion of at least one blade body of the pair of upper and lower blade bodies. Alternatively, they are assembled in a state where they are reciprocated in the left-right direction. When the blade unit is mounted on the main body, the rotation drive means of the main body and the rotation drive means of the eccentric cam of the blade body unit can be connected, so that the blade unit can be put into use only by being mounted on the main body. It can be set.

Utility Model Registration No. 2551081 JP 2003-117267 A

  However, in the electric tool (hand-held electric cutting tool) according to Patent Document 2 listed above, the drive connection between the main body having the drive source and the speed reduction unit and the blade body unit having the blade tool and the cam is provided in both. Since the clutch plates are connected to each other, the attachment / detachment operation of the blade unit to the main body is still complicated. Further, in such a configuration, the weight of the apparatus is increased due to the provision of the clutch plate, which has been a factor in reducing workability. In addition, the presence of the clutch plate is a factor for increasing the manufacturing cost.

  Furthermore, in the electric power tool (hand-held electric cutting tool) according to Patent Document 2, since the driven gear for reduction is arranged on the main body side, it is difficult to change the gear reduction ratio depending on the type of blade unit. It was. Furthermore, in the electric power tool (hand-held electric cutting tool) according to Patent Document 2, since the clutch plate is disposed adjacent to the lower side of the driven gear, the support shaft of the driven gear is cantilevered, and the strength is increased. It was a structure that remained uneasy. That is, the electric tool (hand-held electric cutting tool) according to Patent Document 2 still has a lot of room for improvement.

  The present invention has been made in view of various problems existing in the above-described prior art, and an object of the present invention is to attach and detach the blade body unit to the main body, and to easily change the application. It is an object of the present invention to provide an electric power tool that can easily attach and detach the blade unit to and from the main body, and that does not increase the weight of the apparatus as compared with the prior art and does not increase the manufacturing cost.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

  An electric power tool (10, 100, 200) according to the present invention includes a main body (11) that houses a motor (12) that is a driving source, and a blade tool that operates by receiving a driving force from the motor (12). Blade unit (21, 121, 221) having (22, 122), and the main body (11) is formed at the shaft tip of the motor shaft (14) of the motor (12). The blade unit (21, 121, 221) has a driven gear (24a, 124a) that meshes with the drive gear (14a) and is attached to the driven gear (24a, 124a). The drive gear (14a) disposed in the main body (11), and the blade unit, which has a blade tool (22, 122) that operates in accordance with the rotational movement of the driven shaft (24, 124). (21 The blade unit (21, 121, 221) is configured to be attached to and detached from the main body (11) at a meshing portion with the driven gear (24a, 124a) disposed at 121, 221). When the blade unit (21, 121, 221) is attached to the main body (11), the driven shaft (24, 124) is offset from the motor shaft (14). It is characterized by that.

  In the electric tool (10, 100, 200) according to the present invention, the drive gear (14a) and the driven gear (24a, 124a) are configured as helical gears, and the drive gear (14a) and the driven gear The torsional direction and the rotational direction of (24a, 124a) can be set such that axial force acts in a direction that draws the driven gear (24a, 124a) toward the main body (11).

  In the electric tool (10, 100, 200) according to the present invention, it is preferable that the driven shaft (24, 124) has a double-sided support structure in the blade unit (21, 121, 221). It is.

  Furthermore, in the electric tool (10, 100, 200) according to the present invention, the main body (11) is slidably disposed at the attachment / detachment portion with the blade unit (21, 121, 221). A plurality of locking claws (61b) are provided, and each of the plurality of locking claws (61b) is engaged with an attachment / detachment portion of the blade unit (21, 121, 221) with the main body portion (11). A locking portion (71) that can be stopped is provided, and the plurality of locking claws (61b) are always biased in the locking direction by receiving an elastic force from the elastic body (62), It can be assumed that it can be moved to the unlocking position by sliding and receiving a force in a direction against the elastic force exerted by the elastic body (62).

  Furthermore, in the electric tool (10, 100, 200) according to the present invention, the main body portion (11) includes a front housing portion (11a) that houses the motor (12) and a grip that receives a grip from an operator. An upper housing part (11b) as a part, and a lower housing part (11c) serving as an attachment / detachment part of the blade unit (21, 121, 221). An operation portion (61c) for sliding the claw (61b) is disposed on the upper surface of the lower housing portion (11c), and the upper housing portion (11b), the lower housing portion (11c), and It can be configured to be operable from the side of the grasping space (S) formed by being surrounded by.

  According to the present invention, the blade unit can be attached to and detached from the main body portion, and in the electric tool that can be easily changed in usage, the blade body unit can be easily attached to and detached from the main body portion. Compared with this, it is possible to provide an electric tool that does not increase the weight of the apparatus and does not increase the manufacturing cost.

It is an external view which shows the upper surface of the hedge trimmer which concerns on 1st embodiment. It is sectional drawing which shows the code | symbol AA in FIG. It is sectional drawing which shows the code | symbol BB cross section in FIG. It is a figure which shows the state by which the hedge trimmer which concerns on 1st embodiment was isolate | separated into the main-body part and the blade body unit, and the external appearance perspective view at the time of seeing especially from the upper surface side is shown. It is a figure which shows the state by which the hedge trimmer which concerns on 1st embodiment was isolate | separated into the main-body part and the blade body unit, and the external appearance perspective view at the time of seeing especially from the lower surface side is shown. It is a longitudinal section side view in the state where the hedge trimmer concerning a first embodiment was separated into a main part and a blade unit. It is an external appearance perspective view for demonstrating the shape in the components single-piece | unit of the locking member with which the main-body part of the hedge trimmer which concerns on 1st embodiment is provided, and the external appearance perspective view when a partial view (a) is seen from the upper surface side. FIG. 2B is a perspective view of the appearance when the partial view (b) is viewed from the lower surface side. It is sectional drawing which shows the code | symbol CC cross section in FIG. It is sectional drawing which shows the code | symbol DD cross section in FIG. It is an external view which shows the upper surface of the reciprocating saw which concerns on 2nd embodiment. It is sectional drawing which shows the code | symbol EE cross section in FIG. It is a figure which shows the state by which the reciprocating saw which concerns on 2nd embodiment was isolate | separated into the main-body part and the blade body unit, and the external appearance perspective view at the time of seeing especially from the upper surface side is shown. It is a figure which shows the state by which the reciprocating saw which concerns on 2nd embodiment was isolate | separated into the main-body part and the blade body unit, and the external appearance perspective view at the time of seeing especially from the lower surface side is shown. It is a figure for demonstrating the power transmission mechanism of the reciprocating saw which concerns on 2nd embodiment, a part (a) shows the FF cross section in FIG. 11, and a part (b) shows G- in FIG. It is sectional drawing which shows G cross section. It is an external view which shows the upper surface of the clipper which concerns on a deformation | transformation form. It is sectional drawing which shows the code | symbol HH cross section in FIG. The longitudinal cross-section side view in the state where the clipper concerning a modification was separated into a main part and a blade unit is shown. It is a figure which shows the state by which the clipper which concerns on a deformation | transformation form was isolate | separated into the main-body part and the blade body unit, and the external appearance perspective view at the time of seeing especially from the lower surface side is shown.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in each embodiment are essential to the solution means of the invention. Not exclusively.

[First embodiment]
The hedge trimmer 10 as an electric tool according to the first embodiment will be described with reference to FIGS. Here, FIG. 1 is an external view showing an upper surface of the hedge trimmer according to the first embodiment, FIG. 2 is a cross-sectional view showing a cross section AA in FIG. 1, and FIG. It is sectional drawing which shows the code | symbol BB inside. 4 and 5 are views showing a state in which the hedge trimmer according to the first embodiment is separated into the main body portion and the blade unit, and FIG. 4 is an external perspective view when viewed from the upper surface side. FIG. 5 shows an external perspective view when viewed from the lower surface side. FIG. 6 is a vertical cross-sectional side view in a state where the hedge trimmer according to the first embodiment is separated into the main body and the blade unit. Moreover, FIG. 7 is an external perspective view for explaining the shape of a single component of the locking member provided in the main body portion of the hedge trimmer according to the first embodiment, and the partial view (a) is viewed from the upper surface side. The external appearance perspective view in the case is shown, and the partial view (b) shows the external perspective view when viewed from the lower surface side. 8 is a cross-sectional view showing a cross section taken along line CC in FIG. 2, and FIG. 9 is a cross-sectional view showing a cross section taken along line DD in FIG.

  In the first embodiment, the direction of the hedge trimmer 10 is defined as shown in FIGS. 1 and 2 for convenience of explanation. That is, when the operator holds the hedge trimmer 10 according to the first embodiment, “front, rear, upper, lower, left, right” is determined based on the direction when viewed from the operator.

  As shown in FIGS. 2, 4, and 5, the hedge trimmer 10 according to the first embodiment operates by receiving a driving force from the motor unit 12 and a main body 11 that houses a motor 12 that is a driving source. The blade body unit 21 having the blade body tool 22 is configured to be configured, and the main body 11 and the blade body unit 21 are configured to be detachable so as to be separable and connectable.

  As shown in detail in FIG. 2, the outer shape of the main body 11 includes a front housing part 11 a that houses the motor 12, an upper housing part 11 b that functions as a gripping part that receives gripping from an operator, and a blade body The unit 21 includes a lower housing portion 11c serving as an attaching / detaching portion of the unit 21 and a rear housing portion 11d on which an electric cord 15 for supplying electric power from an external power source is installed. The upper housing part 11b is provided with a trigger switch 13 for operating the motor 12 installed in the front housing part 11a, and an operator turns the trigger switch 13 on and off. The motor 12 is started / stopped.

  The motor 12 has a motor shaft 14 whose axial direction is directed in the vertical direction. A driving gear 14 a is formed at the shaft tip portion on the lower side of the motor shaft 14 of the motor 12. As shown in FIG. 5, the drive gear 14 a is provided so as to protrude downward from the lower surface side of the main body 11. In other words, the portion from which the drive gear 14 a protrudes corresponds to the attachment / detachment portion of the main body 11 with the blade unit 21, and protrudes from the main body 11 when the blade unit 21 is attached to the main body 11. The drive gear 14a is configured to be inserted into the blade unit 21 (see FIG. 2 and the like).

  The drive gear 14a formed at the shaft tip of the motor shaft 14 is configured as a helical gear having a helix angle. The twisting direction of the drive gear 14a according to the first embodiment is right-handed as shown in FIG. 5, and the drive gear 14a rotates clockwise when the hedge trimmer 10 is viewed from the upper surface side. Is configured to do.

  On the other hand, as shown in FIGS. 2 and 6, the blade unit 21 has a driven gear 24 a that meshes with the drive gear 14 a of the main body 11, and the rotational movement of the driven shaft 24 to which the driven gear 24 a is attached. It has a blade tool 22 that operates with it.

  When the blade unit 21 is attached to the main body 11, the driven gear 24a is configured to mesh with the drive gear 14a. That is, the driven gear 24a is configured as a left-twisted helical gear having the same helix angle as the drive gear 14a. When the hedge trimmer 10 is viewed from the upper surface side, if the drive gear 14a rotates clockwise, the driven gear 24a rotates counterclockwise.

  Further, as shown in FIG. 9, an eccentric cam 25 is attached to the driven shaft 24 to which the driven gear 24a described above is attached. In the case of the first embodiment, two eccentric cams 25 are installed in the vertical direction with respect to the driven shaft 24, and these two eccentric cams 25 cooperate with a blade tool 22 described later. Thus, it can function as a motion conversion mechanism that converts the rotational motion of the motor 12 transmitted via the motor shaft 14, the drive gear 14 a, the driven gear 24 a, and the driven shaft 24 into the longitudinal motion of the blade tool 22. it can.

  Next, the configuration of the blade tool 22 will be described with reference to FIGS. 1, 2, and 4 to 6. The blade tool 22 includes a plate-like upper blade 22a and a lower blade 22b that function as a cutting blade. The upper and lower blades 22a and 22b have long portions 22c and 22d extending in the front-rear direction, and a plurality of cutting blades 22c 'and 22d' arranged in a comb shape on both sides of the long portions 22c and 22d. . Above the long portion 22c of the upper blade 22a, there is disposed an upper blade holder 31 formed of a metal plate material in a U-shape in cross section, and below the long portion 22d of the lower blade 22b, A lower blade holder 32 made of a metal plate is disposed. A cylindrical guide spacer 33 is disposed between the upper blade holder 31 and the lower blade holder 32. A long hole (not shown) into which the guide spacer 33 is loosely fitted is formed in the long portions 22c and 22d of the upper and lower blades 22a and 22b. The blade tool 22 has a guide spacer 33 loosely fitted in a long hole (not shown), and the upper blade holder 31, the upper blade 22a, the lower blade 22b, and the lower blade holder 32 are stacked in this order from above. The upper blade holder 31 and the lower blade holder 32 are connected via the guide spacer 33 by inserting the screw 34 from the side and tightening the nut 35 on the upper side, and between the upper blade holder 31 and the lower blade holder 32. The upper blade 22a and the lower blade 22b are arranged so as to be movable in the front-rear direction. For this reason, the distance between the upper blade holder 31 and the lower blade holder 32 defined by the guide spacer 33 is set slightly larger than the total thickness of the upper blade 22a and the lower blade 22b. Further, as shown in FIG. 9, oval cam grooves 22a 'and 22b' into which the above-described two eccentric cams 25 are inserted and formed are formed at the rear portions of the upper blade 22a and the lower blade 22b. . Further, the rear part of the lower blade holder 32 is fixed to the lower surface of the blade unit 21.

  In the above-described configuration, when the motor 12 is driven by turning on the trigger switch 13, the two eccentric cams 25 rotate and change their phases. Then, due to the action of the two eccentric cams 25 and the two cam grooves 22a 'and 22b', the upper blade 22a and the lower blade 22b reciprocate back and forth with a phase difference of 180 degrees. By such an operation by the blade tool 22, it becomes possible to cut a plant or the like that has entered between the cutting blades 22c ′ and 22d ′.

  The blade unit 21 is provided with an auxiliary handle 28 from the central portion toward the front, and a guard member 29 is provided in front of the auxiliary handle 28. By using the auxiliary handle 28, the operability of the operator can be improved, and by installing the guard member 29, it is possible to appropriately protect the operator from chips and the like flying from the direction of the blade tool 22. It has become.

  The basic configuration of the hedge trimmer 10 according to the first embodiment has been described above. By providing the above-described configuration, the hedge trimmer 10 according to the first embodiment exhibits various significant effects described below.

  That is, as described above, in the hedge trimmer 10 according to the first embodiment, in the meshing portion between the drive gear 14a disposed in the main body 11 and the driven gear 24a disposed in the blade body unit 21, the main body 11 The structure which attaches / detaches the blade unit 21 to / from is adopted. That is, in the first embodiment, the driven gear 24 a that functions as a speed reduction mechanism is installed with respect to the blade unit 21. Such a configuration indicates that the driven gear 24 a can be changed for each blade unit 21. That is, according to the hedge trimmer 10 according to the first embodiment, since the number of teeth of the driven gear 24a can be arbitrarily changed according to the type of the blade tool 22, it is optimal for various blade tools. The gear reduction ratio can be easily selected.

  In addition, since the hedge trimmer 10 according to the first embodiment does not need to be equipped with a clutch plate as in the prior art, it is possible to design a device that reduces an increase in device weight. Further, since a clutch plate that causes an increase in cost is unnecessary, an effect of reducing the manufacturing cost can be obtained.

  In the hedge trimmer 10 according to the first embodiment, when the blade unit 21 is attached to the main body 11, the driven shaft 24 is disposed offset from the motor shaft 14. That is, the center axis of the driven shaft 24 is deviated from the center axis of the motor shaft 14, and the center axis of the driven shaft 24 is rearwardly shifted from the center axis of the motor shaft 14. Yes. Such a configuration contributes to storing the driven shaft 24 in a space-saving manner in the lower housing portion 11c that constitutes the main body portion 11, and the main body portion 11 is made compact. Further, by providing the driven shaft 24 while being shifted rearward with respect to the central axis of the motor shaft 14, the driven shaft 24 can have a double-supported structure in the blade unit. Specifically, as shown in FIG. 2, the driven shaft 24 according to the first embodiment is pivotally supported by a coupling bearing 26 having a hat shape on the upper side and formed on the lower blade holder on the lower side. It is pivotally supported by the hole 27. The configuration of the driven shaft 24 is very advantageous for the driven shaft 24 that functions as a motion conversion mechanism that converts the rotational motion of the motor 12 into the longitudinal motion of the blade tool 22, and the motion conversion is stable and smooth. In addition to exhibiting the effect of the above, the improvement of the life of the apparatus can be obtained by improving the strength and safety factor of the driven shaft 24.

  In the hedge trimmer 10 according to the first embodiment, as described above, the drive gear 14a and the driven gear 24a formed at the shaft tip portion of the motor shaft 14 are configured as a helical gear having a helix angle. And about the twist direction of the drive gear 14a which concerns on 1st embodiment, as FIG. 5 shows, when the hedge trimmer 10 is seen from the upper surface side, the drive gear 14a turns clockwise. It is configured to rotate. On the other hand, the twist direction of the driven gear 24a according to the first embodiment is left-handed to correspond to the drive gear 14a shown in FIG. 5, and when the hedge trimmer 10 is viewed from the upper surface side, When the drive gear 14a rotates clockwise, the driven gear 24a is configured to rotate counterclockwise. Such a configuration exerts an action in which an axial force acts in a direction in which the driven gear 24a is pulled toward the main body 11 side. As described above, the axial force acts in the direction of pulling the driven gear 24a toward the main body 11 (upper side) with respect to the twist angle and the rotation direction of the drive gear 14a of the main body 11 and the driven gear 24a of the blade unit 21. By setting as described above, the blade body unit 21 is attracted to the main body 11, and thus it is possible to suitably prevent the blade body unit 21 from being accidentally dropped from the main body 11.

  Furthermore, the hedge trimmer 10 according to the first embodiment has a configuration for suitably attaching the blade unit 21 to the main body 11. This attachment mechanism will be further described.

  First, the hedge trimmer 10 according to the first embodiment has a positioning mechanism for stably attaching the blade unit 21 to the main body 11. Specifically, as shown in FIG. 5, the drive gear 14 a protrudes downward from the lower surface side of the main body 11, and a circular convex portion 51 having a circular shape is formed around the drive gear 14 a. Is formed. In addition, two cylindrical convex portions 52 are formed behind the circular convex portion 51. On the other hand, as shown in FIG. 4, the circular convex portion 51 is fitted into the upper surface of the blade unit 21 corresponding to the circular convex portion 51 and the two cylindrical convex portions 52. Two small circular concave portions 42 for fitting the circular concave portion 41 and the two cylindrical convex portions 52 are formed. Therefore, when the blade unit 21 is attached to the main body 11, the circular convex portion 51 and the circular concave portion 41 are fitted, and the two cylindrical convex portions 52 and the two small circular concave portions 42. Will be in a fitted state, and the main body 11 and the blade unit 21 will be in a three-point support state, and displacement in the front-rear and left-right directions will be prevented.

  Furthermore, the hedge trimmer 10 according to the first embodiment has a position holding mechanism for holding the attachment state of the blade unit 21 to the main body 11. Specifically, as shown in FIG. 4 to FIG. 7, a locking member 61 disposed so as to be slidable is installed at a part of the main body 11 that is attached to and detached from the blade unit 21. As shown in more detail in FIG. 7, the locking member 61 includes a locking member main body 61a configured as a plate-shaped member, and downward from the four corners on the lower surface side of the locking member main body 61a. It has four latching claws 61b having a substantially L-shape projecting toward the top, and an operation part 61c formed to project upward from the rear upper surface side of the latching member main body 61a. Has been. And this latching member 61 is installed with respect to the lower surface side of the main-body part 11 as FIG. 6 shows in detail, The inside of the lower housing part 11c which forms the downward part of the main-body part 11 is shown. It is installed through. And the operation part 61c which the locking member 61 has is arrange | positioned so that it may expose on the upper surface of the lower housing part 11c, and the holding space formed by being surrounded by the upper housing part 11b and the lower housing part 11c It is configured to be operable from the part S side. Further, a coil spring 62 as an elastic body is installed between the locking member main body 61a of the locking member 61 and the lower surface side of the lower housing portion 11c. Due to the action of the elastic force exerted from the coil spring 62, the locking member 61 is always biased toward the front of the main body 11.

  On the other hand, at the attachment / detachment portion of the blade unit 21 with the main body 11, four locking holes 71 are provided as the four locking portions to which the four locking claws 61 b described above can be locked (see FIG. 4). The four locking holes 71 have a substantially L-shaped groove shape so that the four locking claws 61b can be locked when the four locking claws 61b having a substantially L shape are inserted. (See FIG. 3).

  Therefore, when the main body part 11 is lowered straight toward the blade body unit 21 from the state shown in FIGS. 4 to 6, that is, the state where the main body part 11 and the blade body unit 21 are separated, first, The locking claw 61b comes into contact with a plane in front of the four locking holes 71 (that is, the upper surface of the blade unit 21). Here, as shown in more detail in FIG. 3, the lower ends of the front ends of the four locking claws 61 b are configured to have inclined portions 61 b ′, and front entrances of the four locking holes 71. Since the inclined surface 71 ′ is also configured, the locking member 61 is directed rearward against the elastic force exerted from the coil spring 62 by the action of the inclined portion 61 b ′ and the inclined surface 71 ′. A force for moving the slide is exerted. Then, the locking member 61 receives a force in a direction against the elastic force exerted by the coil spring 62 and slides backward, so that the four locking claws 61 b are inserted into the four locking holes 71. It becomes. Then, the four locking holes 71 have a substantially L-shaped groove shape so that the four locking claws 61b can be locked when the four locking claws 61b having a substantially L shape are inserted. Therefore, the force against the elastic force of the coil spring 62 is released, and the locking member 61 is biased in the locking direction (forward direction of the hedge trimmer 10) by receiving the elastic force exerted by the coil spring 62. Thus, the connected state of the main body 11 and the blade unit 21 as shown in FIG. 3 is realized. That is, by the action of the four locking claws 61b and the four locking holes 71, the main body portion 11 and the blade unit 21 are connected so as not to be separated in the vertical direction, and the circular convex portion 51 and the circular concave shape are connected. The main body 11 and the blade body unit 21 are supported at three points by the fitting action of the portion 41 and the two cylindrical convex portions 52 and the two small circular concave portions 42 to prevent positional deviation in the front-rear and left-right directions. It will be connected in the state where it was done.

  When the main body 11 and the blade unit 21 are separated from the state in which the main body 11 and the blade unit 21 are connected, the operation unit 61c that can be operated from the gripping space S side is moved backward. By doing so, the locked state of the four locking claws 61b and the four locking holes 71 is released, so that the main body part 11 and the blade can be removed by pulling the main body part 11 upward from the blade body unit 21. Separation from the body unit 21 is possible. That is, according to the first embodiment, the attachment work of the main body part 11 and the blade unit 21 can be realized with one action, and the removal work of the main body part 11 and the blade unit 21 is Since it can be realized by two actions, it is possible to very easily perform the attaching and detaching work of the blade unit 21 which has been troublesome in the prior art.

  In the first embodiment, the four locking claws 61b of the locking member 61 are moved from the meshing position of the drive gear 14a and the driven gear 24a, which are power transmission parts between the main body 11 and the blade unit 21. Since it is arrange | positioned at each of the right and left of the position spaced apart back and forth, this structure also contributes to realization of the stable connection state of the main-body part 11 and the blade body unit 21. FIG.

  Furthermore, the operation portion 61c of the locking member 61 is configured to be operable from the gripping space portion S side formed by being surrounded by the upper housing portion 11b and the lower housing portion 11c. For example, it is possible to suitably prevent the operation unit 61c from malfunctioning due to a foreign object or the like.

  In addition, when connecting the main-body part 11 and the blade body unit 21, it has been confirmed that the meshing of the drive gear 14a and the driven gear 24a is automatically achieved by the tooth surfaces following each other. Even when the end surfaces of the teeth are in contact with each other, it is confirmed that the contact state of the tooth end surfaces is canceled by the slight movement of the drive gear 14a and the driven gear 24a, and a smooth connecting operation is possible. ing.

  Incidentally, in addition to the switch device 13a for the trigger switch 13, the main body portion 11 is provided with a switch device 13b for a safety device at a rear position of the lower housing portion 11c. When the blade unit 21 is connected to the main body 11, the switch device 13b is configured such that the safety device projection 55 formed behind the blade unit 21 pushes the switch contact piece of the switch device 13b. The switch is turned on, and the hedge trimmer 10 can be operated for the first time when the switch is turned on. That is, when the main body 11 and the blade unit 21 are separated, the safety switch device 13b is turned off, so that the hedge trimmer 10 does not operate even if the trigger switch 13 is operated. Thus, it can be said that the hedge trimmer 10 according to the first embodiment is a device with high safety.

  The embodiment in the case where the power tool according to the present invention is configured as the hedge trimmer 10 has been described above. However, the electric power tool of the present invention can be applied to any type of electric power tool, and by installing another form of blade unit on the main body 11 according to the first embodiment described above, It can be used as a kind of electric tool. Therefore, next, as a second embodiment, an embodiment in the case where the electric tool according to the present invention is configured as a reciprocating saw will be described.

[Second Embodiment]
The reciprocating saw 100 as an electric tool according to the second embodiment will be described with reference to FIGS. Here, FIG. 10 is an external view showing the top surface of the reciprocating saw according to the second embodiment, and FIG. 11 is a cross-sectional view showing a section taken along line EE in FIG. 12 and 13 are views showing a state in which the reciprocating saw according to the second embodiment is separated into the main body portion and the blade unit, and FIG. 12 is an external perspective view when viewed from the upper surface side. FIG. 13 shows an external perspective view when viewed from the lower surface side. Furthermore, FIG. 14 is a figure for demonstrating the power transmission mechanism of the reciprocating saw which concerns on 2nd embodiment, a part (a) shows the FF cross section in FIG. 11, and part (b) shows It is sectional drawing which shows the GG cross section in FIG.

  In the second embodiment, the direction of the reciprocating saw 100 is defined as shown in FIGS. 10 and 11 for convenience of explanation. That is, when the operator grips the reciprocating saw 100 according to the second embodiment, “front, rear, upper, lower, left, right” is determined based on the direction when viewed from the operator.

  The reciprocating saw 100 according to the second embodiment operates in response to a driving force from the motor unit 12 and the main body 11 that houses the motor 12 that is a driving source, as shown in FIGS. 11, 12, and 13. The blade body unit 121 having the blade body tool 122 to be configured, and the main body 11 and the blade body unit 121 are configured to be detachable so as to be separable and coupled.

  Here, the main body 11 included in the reciprocating saw 100 according to the second embodiment has the same configuration as the main body 11 included in the hedge trimmer 10 according to the first embodiment described above. Therefore, in the second embodiment described below, members that are the same as or similar to those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 11, the blade unit 121 according to the second embodiment includes a driven gear 124 a that meshes with a drive gear 14 a included in the main body 11, and rotates a driven shaft 124 to which the driven gear 124 a is attached. It has a blade tool 122 that moves with movement.

  When the blade unit 121 is attached to the main body 11, the driven gear 124a is configured to mesh with the drive gear 14a. That is, the driven gear 124a is configured as a left-twisted helical gear having the same helix angle as the drive gear 14a. When the reciprocating saw 100 is viewed from the upper surface side, if the drive gear 14a rotates clockwise, the driven gear 124a rotates counterclockwise.

  Further, as shown in FIGS. 11 and 14, two eccentric cams (upper eccentric cam 125a and lower eccentric cam 125b) are attached to the driven shaft 124 to which the driven gear 124a described above is attached. These two eccentric cams 125a and 125b are arranged so that the center position of the eccentric cam 125 deviates from the axis center of the driven shaft 124, and are arranged 180 degrees out of phase with each other. In the case of the second embodiment, the two eccentric cams 125a and 125b cooperate with a blade arbor 122a and a counterweight 127 included in a blade tool 122, which will be described later, so that the motor shaft 14, the drive gear 14a, and the driven The rotary motion of the motor 12 transmitted via the gear 124 a and the driven shaft 124 can function as a motion conversion mechanism that converts the blade tool 122 into a stable longitudinal motion.

  That is, the blade unit 121 according to the second embodiment is configured to include the blade arbor 122a related to the upper eccentric cam 125a. The blade arbor 122a functioning as a transmission part in the second embodiment is, as shown in particular in FIG. 14, a main part that is a long plate formed extending in the front-rear direction, and a blade tool on the front side of the main part. And a clamp for attaching 122. The main part of the blade arbor 122 a is disposed so as to extend in the front-rear direction inside the blade unit 121, and the clamp is disposed so as to protrude forward of the blade unit 121. An oblong cam groove 122b is formed in the main part of the blade arbor 122a. In the cam groove 122b, the above-described upper eccentric cam 125a is installed in a rollable state. Arbor metal 131, which is a bearing disposed on the left and right in the blade unit 121, is disposed on the left and right side surfaces of the blade arbor 122a across the cam groove 122b. The blade arbor 122a The movement in the left-right direction within the blade unit 121 is regulated by the action of the metal 131 (see the partial diagrams (a) in FIGS. 11 and 14). The shape of the left and right side surfaces of the blade arbor 122a in contact with the arbor metal 131 can be formed, for example, as a projecting shape having a rounded arc shape. It can be configured such that a sliding movement can be performed.

  Further, the blade unit 121 according to the second embodiment is configured to include a counterweight 127 related to the lower eccentric cam 125b. The counterweight 127 is a member for balancing the weight of the blade arbor 122a that reciprocates in the front-rear direction and the blade tool 122 attached to the blade arbor 122a. The counterweight 127 is configured as a weight member installed immediately below the blade arbor 122a, as shown in a partial diagram (b) in FIGS. 11 and 14, and has an elliptical cam groove 122c. Is formed. In the cam groove 122c, the lower eccentric cam 125b described above is installed in a rollable state. Arbor metal 131, which is a bearing disposed on the left and right in the blade unit 121, is disposed on the left and right side surfaces of the counterweight 127 with the cam groove 122c interposed therebetween, and the counterweight 127 is an arbor. The movement in the left-right direction within the blade unit 121 is regulated by the action of the metal 131 (see the partial diagrams (b) in FIGS. 11 and 14). The shape of the left and right side surfaces of the counterweight 127 that contacts the arbor metal 131 can also be formed, for example, in a protruding shape having a rounded arc shape, similar to the blade arbor 122a described above. The counterweight 127 can be configured to perform a smooth sliding motion in the front-rear direction.

  With the above configuration, when the motor 12 is driven by turning on the trigger switch 13, the motor shaft 14 is rotated by the rotational drive of the motor 12, and further via the drive gear 14 a, the driven gear 124 a and the driven shaft 124. Thus, the rotational driving force is transmitted, and the two eccentric cams (the upper eccentric cam 125a and the lower eccentric cam 125b) perform rotational motion. Then, the blade arbor 122a performs a reciprocating linear motion in the front-rear direction by the eccentric rotational movement around the driven shaft 124 by the upper eccentric cam 125a and the sliding action of the upper eccentric cam 125a and the cam groove 122b. Further, the counterweight 127 performs a reciprocating linear motion in the front-rear direction by the eccentric rotational movement around the driven shaft 124 by the lower eccentric cam 125b and the sliding contact action between the lower eccentric cam 125b and the cam groove 122c. Become. At this time, the blade arbor 122a and the counterweight 127 reciprocate back and forth with a phase difference of 180 degrees by the action of the two eccentric cams 125a and 125b and the two cam grooves 122b and 122c. The change in the center of gravity is kept almost constant. At this time, since the blade arbor 122a and the counterweight 127 are restricted from moving in the left-right direction by the arbor metal 131, the blade arbor 122a and the counterweight 127 can smoothly slide in the front-rear direction. Yes. And since the blade-shaped tool 122 in the shape of a knife is attached to the front side of the blade arbor 122a, it becomes possible to cut wall plates, vegetation and the like by the back-and-forth operation of the blade tool 122.

  As shown in FIG. 11, the driven shaft 124 according to the second embodiment is axially supported by a coupling bearing 26 having a hat shape on the upper side and a metal plate 27 ′ having a plate shape on the lower side. It is supported. The configuration of the driven shaft 124 is very advantageous for the driven shaft 124 that functions as a motion conversion mechanism that converts the rotational motion of the motor 12 into the longitudinal motion of the blade tool 122, and the motion conversion is stable and smooth. In addition to the effects of the above, the improvement of the life of the apparatus can be obtained by improving the strength and safety factor of the driven shaft 124.

  The basic configuration of the reciprocating saw 100 according to the second embodiment has been described above. The reciprocating saw 100 according to the second embodiment can exhibit the same operational effects as the hedge trimmer 10 according to the first embodiment described above by having the above-described configuration. That is, according to the reciprocating saw 100 according to the second embodiment, the number of teeth of the driven gear 124a can be arbitrarily changed according to the type of the blade tool 122, so that it is optimal for various blade tools. It is possible to easily select the gear reduction ratio. Further, in the reciprocating saw 100 according to the second embodiment, since it is not necessary to equip the clutch plate as in the prior art, it is possible to design the apparatus with reduced increase in the apparatus weight. Further, since a clutch plate that causes an increase in cost is unnecessary, an effect of reducing the manufacturing cost can be obtained. Further, in the reciprocating saw 100 according to the second embodiment, when the blade unit 121 is attached to the main body 11, the driven shaft 124 is offset with respect to the motor shaft 14, so that the apparatus The downsizing is realized. Further, in the reciprocating saw 100 according to the second embodiment, since the driven shaft 124 has a both-end support structure, motion conversion can be performed stably and smoothly, and the strength and safety factor of the driven shaft 124 can be improved. As a result, the effect of improving the device life can be obtained.

  Furthermore, in the reciprocating saw 100 according to the second embodiment, the drive gear 14a and the driven gear 124a formed at the shaft tip of the motor shaft 14 are configured as a helical gear having a helix angle. And about the twist direction of the drive gear 14a which concerns on 2nd embodiment, as FIG. 13 shows, when the reciprocating saw 100 is seen from the upper surface side, the drive gear 14a turns clockwise. It is configured to rotate. On the other hand, as described above, the twisted direction of the driven gear 124a according to the second embodiment is left-twisted so as to correspond to the drive gear 14a shown in FIG. 13, and the reciprocating saw 100 is moved from the upper surface side. When viewed, if the drive gear 14a rotates clockwise, the driven gear 124a is configured to rotate counterclockwise. Such a configuration exerts an action in which an axial force acts in a direction of pulling the driven gear 124a toward the main body 11 side. As described above, the axial force acts in the direction of pulling the driven gear 124a toward the main body 11 (upper side) with respect to the torsion angle and the rotational direction of the drive gear 14a of the main body 11 and the driven gear 124a of the blade unit 121. By setting as described above, the blade unit 121 is attracted to the main body 11, and thus it is possible to suitably prevent the blade unit 121 from being accidentally dropped from the main body 11.

  In the reciprocating saw 100 according to the second embodiment, the configuration for suitably attaching the blade unit 121 to the main body 11 is the same as that of the hedge trimmer 10 according to the first embodiment.

  That is, the reciprocating saw 100 according to the second embodiment has a positioning mechanism for stably attaching the blade unit 121 to the main body 11. Specifically, as shown in FIG. 13, a drive gear 14a protrudes downward from the lower surface side of the main body 11, and a circular convex portion 51 having a circular shape is formed around the drive gear 14a. Is formed. In addition, two cylindrical convex portions 52 are formed behind the circular convex portion 51. On the other hand, as shown in FIG. 12, the circular convex portion 51 is fitted into the upper surface of the blade body unit 121 corresponding to the circular convex portion 51 and the two cylindrical convex portions 52 described above. Two small circular concave portions 142 for fitting the circular concave portion 141 and the two cylindrical convex portions 52 are formed. Therefore, when the blade unit 121 is attached to the main body 11, the circular convex portion 51 and the circular concave portion 141 are in a fitted state, and the two cylindrical convex portions 52 and the two small circular concave portions 142. Will be in a fitted state, and the main body 11 and the blade unit 121 will be in a three-point support state, and displacement in the front-rear and left-right directions will be prevented.

  Furthermore, the reciprocating saw 100 according to the second embodiment has a position holding mechanism for holding the attachment state of the blade body unit 121 to the main body 11, and as shown in FIGS. 12 and 13, the main body 11 is provided with a locking member 61 that is slidably disposed at a part of the blade unit 121 that is detachable from the blade unit 121. The locking member 61 has a locking member body 61a configured as a plate-shaped member, and a substantially L-shape that protrudes downward from the four corners on the lower surface side of the locking member body 61a. It has four latching claws 61b and an operation portion 61c formed to project upward from the upper surface side behind the latch member main body 61a. And this latching member 61 is installed with respect to the lower surface side of the main-body part 11 as FIG. 12 and FIG. 13 shows in detail, The lower housing part which forms the downward part of the main-body part 11 11c is penetrated and installed. And the operation part 61c which the locking member 61 has is arrange | positioned so that it may expose on the upper surface of the lower housing part 11c, and the holding space formed by being surrounded by the upper housing part 11b and the lower housing part 11c It is configured to be operable from the part S side (see also FIG. 11). Further, a coil spring 62 as an elastic body is installed between the locking member main body 61a of the locking member 61 and the lower surface side of the lower housing portion 11c. Due to the action of the elastic force exerted from the coil spring 62, the locking member 61 is always biased toward the front of the main body 11.

  On the other hand, a locking hole 171 as four locking portions that can be locked with each of the four locking claws 61b described above is provided at a part of the blade unit 121 that is attached to and detached from the main body 11 (see FIG. 12). The four locking holes 171 have a substantially L-shaped groove shape so that the four locking claws 61b can be locked when the four locking claws 61b having a substantially L shape are inserted. It is configured.

  Therefore, when the main body portion 11 is lowered straight toward the blade body unit 121 from the state shown in FIGS. 12 and 13, that is, the state where the main body portion 11 and the blade body unit 121 are separated, first, The locking claw 61b comes into contact with a plane in front of the four locking holes 171 (that is, the upper surface of the blade unit 21). Then, the locking member 61 receives a force in a direction against the elastic force exerted by the coil spring 62 and slides backward, so that the four locking claws 61b are inserted into the four locking holes 171. It becomes. Then, the four locking holes 171 have a substantially L-shaped groove shape so that the four locking claws 61b can be locked when the four locking claws 61b having a substantially L shape are inserted. Thus, the force against the elastic force of the coil spring 62 is released, and the locking member 61 is biased in the locking direction by receiving the elastic force exerted by the coil spring 62, as shown in FIG. The connected state of the main body 11 and the blade unit 121 is realized.

  When the main body 11 and the blade unit 121 are separated from the state in which the main body 11 and the blade unit 121 are connected, the operation unit 61c that can be operated from the gripping space S side is moved backward. By doing so, the locked state of the four locking claws 61b and the four locking holes 171 is released, so that the main body part 11 and the blade can be removed by pulling the main body part 11 upward from the blade body unit 121. Separation from the body unit 121 is possible. That is, according to the second embodiment, the attachment work between the main body 11 and the blade unit 121 can be realized with one action, and the removal work between the main body 11 and the blade unit 121 is Since it can be realized with two actions, it is possible to very easily perform the attachment / detachment work of the blade unit 121, which is troublesome in the prior art.

  In the second embodiment, the four locking claws 61b of the locking member 61 are moved from the meshing position of the drive gear 14a and the driven gear 124a, which are power transmission parts between the main body 11 and the blade unit 121. Since it arrange | positions at each of the right and left of the position spaced apart back and forth, the stable connection state of the main-body part 11 and the blade body unit 121 is implement | achieved.

  Furthermore, the operation portion 61c of the locking member 61 is configured to be operable from the gripping space portion S side formed by being surrounded by the upper housing portion 11b and the lower housing portion 11c. For example, it is possible to suitably prevent malfunctions caused by contact with foreign matter.

  It has been confirmed that when the main body 11 and the blade unit 121 are connected, the meshing between the drive gear 14a and the driven gear 124a is automatically achieved by the tooth surfaces following each other. Even when the end surfaces of the teeth are in contact with each other, it is confirmed that the contact state of the tooth end surfaces is canceled by the slight movement of the drive gear 14a and the driven gear 124a, and a smooth coupling operation is possible. ing.

  Incidentally, in addition to the switch device 13a for the trigger switch 13, the main body portion 11 is provided with a switch device 13b for a safety device at a rear position of the lower housing portion 11c. When the blade unit 121 is connected to the main body 11, the switch device 13b is configured such that the safety device projection 155 formed behind the blade unit 121 pushes the switch contact piece of the switch device 13b. The reciprocating saw 100 can be operated for the first time when the switch is turned on. That is, when the main body 11 and the blade unit 121 are separated, the safety device switching device 13b is turned off, so that even if the trigger switch 13 is operated, the reciprocating saw 100 does not operate. Thus, it can be said that the reciprocating saw 100 according to the second embodiment is a device with high safety.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment. That is, in the first and second embodiments described above, the embodiments in the case where the power tool according to the present invention is configured as the hedge trimmer 10 or the reciprocating saw 100 have been described. However, the electric power tool of the present invention is further applicable to all types of electric power tools, and another type of blade unit is installed on the main body 11 according to the first and second embodiments described above. Thus, it can be used as another type of electric tool.

  For example, in the hedge trimmer 10 and the reciprocating saw 100 described above, the blade tools 22 and 122 reciprocate in the front-rear direction. However, in the electric tool according to the present invention, the blade tool such as a clipper is horizontally horizontal. It can also be applied to a type that moves in a direction. Specifically, the electric tool according to the present invention can be configured as the clipper 200 as shown in FIGS. 15-18 is a figure which shows an example of the various deformation | transformation form which this invention can take, and especially FIG. 15 is an external view which shows the upper surface of the clipper which concerns on a deformation | transformation form, FIG. It is sectional drawing which shows the code | symbol HH cross section in FIG. 15, FIG. 17 has shown the longitudinal cross-section side view in the state by which the clipper which concerns on a deformation | transformation form was isolate | separated into the main-body part and the blade body unit. FIG. 18 is a view showing a state where the clipper according to the modified embodiment is separated into the main body and the blade unit, and particularly shows an external perspective view when viewed from the lower surface side. 15 to 18, members that are the same as or similar to the members described in the first and second embodiments described above are denoted by the same reference numerals.

  In the clipper 200 according to this modification, the main body 11 has the same configuration as the main body 11 described in the first and second embodiments. On the other hand, the basic configuration of the blade unit 221 including the configuration for attaching and detaching is exactly the same. However, in the blade unit 221 according to this modification, the second reduction gear 223 is installed as the second reduction gear that meshes with the driven gear 24a. By additionally installing the second reduction gear 223, a suitable gear reduction ratio according to various blade tools can be realized. As described above, the blade unit 221 according to the present invention can arbitrarily change the number of gears in accordance with the type of blade tool, the intended use, the required specifications, etc. Can be provided at low cost.

  The mechanism for converting the rotational movement from the motor 12 into the horizontal and horizontal movement is a well-known matter and will not be described here. However, as illustrated in FIGS. For such a blade unit, it is possible to apply various tools having all types and functions, and according to the present invention, it is an economic advantage for users who need power tools for various purposes. Can be provided.

  It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Hedge trimmer, 11 Main part, 11a Front housing part, 11b Upper housing part, 11c Lower housing part, 11d Rear housing part, 12 Motor, 13 Trigger switch, 13a, 13b Switch device, 14 Motor shaft, 14a Drive gear, 15 Electricity Code, 21 Blade unit, 22 Blade tool, 22a Upper blade, 22a 'Cam groove, 22b Lower blade, 22b' Cam groove, 22c, 22d Long section, 22c ', 22d' Cutting blade, 24 Drive shaft, 24a Drive gear, 25 eccentric cam, 26 coupling bearing, 27 holes, 27 'metal plate, 28 auxiliary handle, 29 guard member, 31 upper blade holder, 32 lower blade holder, 33 guide spacer, 34 screw, 35 nut, 41 circular Concave part, 42 Small circular concave part, 5 Circular convex part, 52 Cylinder convex part, 55 Safety device convex part, 61 Locking member, 61a Locking member main body part, 61b Locking claw, 61b 'inclined part, 61c Operation part, 62 Coil spring, 71 Locking Hole, 71 'inclined surface, 100 reciprocating saw, 121 blade unit, 122 blade tool, 122a blade arbor, 122b, 122c cam groove, 124 driven shaft, 124a driven gear, 125a upper eccentric cam, 125b lower eccentric cam, 127 Counterweight, 131 Arbor metal, 141 circular concave part, 142 small circular concave part, 155 safety device convex part, 171 locking hole, 200 clipper, 221 blade unit, 223 second reduction gear, S gripping space part.

Claims (5)

A main body for storing a motor as a drive source;
A blade unit having a blade tool that operates by receiving a driving force from the motor;
With
The main body has a drive gear formed at the shaft tip of the motor shaft of the motor,
The blade unit has a driven tool that engages with the drive gear and has a blade tool that operates in accordance with the rotational movement of the driven shaft to which the driven gear is attached,
The blade body unit is configured to be attached to and detached from the body portion at a meshing portion between the drive gear disposed in the body portion and the driven gear disposed in the blade body unit.
The electric power tool characterized in that the driven shaft is arranged offset with respect to the motor shaft when the blade unit is attached to the main body. The power tool according to claim 1,
The drive gear and the driven gear are configured as a helical gear,
An electric power tool characterized in that a twisting direction and a rotating direction of the driving gear and the driven gear are set so that an axial force acts in a direction of pulling the driven gear toward the main body. In the electric tool according to claim 1 or 2,
The driven tool has a dual-support structure in the blade unit. In the electric tool according to any one of claims 1 to 3,
A plurality of latching claws disposed so as to be slidable are provided at the attachment / detachment portion of the main body portion with the blade unit,
At the attachment / detachment portion of the blade unit with the main body, a locking portion that can lock each of the plurality of locking claws is provided,
The plurality of locking claws are always urged in the locking direction by receiving an elastic force from an elastic body, and are slid by receiving a force in a direction against the elastic force exerted by the elastic body. An electric tool characterized in that it can be moved to the unlocking position. In the electric tool according to any one of claims 1 to 4,
The main body is
A front housing portion for housing the motor;
An upper housing portion as a gripping portion for receiving gripping from an operator;
A lower housing part to be a detachable part of the blade unit;
At least, and
An operation portion for slidingly moving the plurality of locking claws is disposed with respect to the upper surface of the lower housing portion, and a gripping space formed by being surrounded by the upper housing portion and the lower housing portion A power tool configured to be operable from the side.

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