JP2014042985A - Attaching arrangement for hand-held motor-driven tools - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arrangement for attaching a bar 1 of a hand-held motor-driven tool, such as a chain saw, to a body 2 of the tool.SOLUTION: The arrangement comprises: at least one bolt 3, which has a first part 3a securely arranged to the body 2 and a second part 3b extending from the body and having an engagement portion 3c engaging with a nut 5, 15; a cover portion 4 in contact with a bar 1 with the bar arranged between the cover portion 4 and the body 2; and at least one nut 5, captively attached to the cover portion 4. The nut engages with the engagement portion 3c of the bolt 3 to secure the bar 1 between the cover portion 4 and the body 2. The nut has a rotation axis X. The nut is also arranged to move a first distance A along the engagement portion 3c of the bolt 3 in the direction of the rotation axis X, and secures the bar 1 between the cover portion 4 and the body 2.

Description

  The present invention relates to an attachment device for a hand-held power tool such as a chainsaw. In particular, the present invention relates to an apparatus for attaching such a hand-held power tool bar to the body of the tool.

  A conventional chainsaw includes a main body and a guide bar that supports the chainsaw. The cover fastens and fixes the guide bar to the main body by a tightening device including a rod bolt and a nut. It may be necessary to remove the cover from the body, for example for reasons such as changing the bar, or if the chain has been disengaged. To remove the cover, the nut must be removed from the rod bolt and the clamping device must be loosened.

  The problem with conventional tightening devices, where the nuts removed from the rod bolts are not connected anywhere, is a problem, especially when in the forest, when the tool operator removes the cover from the body, the nuts can be lost Is that there is. Operators often place nuts that have been removed from rod bolts on the ground, but it will be difficult to find the nuts again because the ground is usually covered with bushes and bushes.

  Patent Document 1 discloses an apparatus that prevents the nut from being lost when the cover is removed by disposing the nut inside the cover. The disadvantage with this device is that the nut hits the bolt before the cover hits the guide bar, so if the nut and bolt do not begin to screw, the cover can be pressed against the body to hold the guide bar in place. It is impossible. Instead, the operator needs to screw the nut with the other hand while holding the guide bar in the correct position with one hand, which complicates the installation work.

  For large chainsaws with long guide bars, two bar bolts and corresponding nuts are commonly used to enhance the mounting because the guide bar clamping device is subject to greater deformation forces. An apparatus having two rod bolts is disclosed in Patent Document 2. In a chainsaw having two or more bar bolts, the device described in Patent Document 1 is inconvenient because the nuts cannot be removed one by one. Instead, the operator must alternately remove the nuts, and it takes a little effort to remove the cover from the body.

  The reason why the operator removes the cover is not only for the purpose of exchanging bars and chains. For example, the operator overhauls once a week, including inspection of brake parts and inspection of a centrifugal clutch. It is necessary to remove the cover during these inspections. Another reason for removing the cover is to allow access when cleaning the groove or hole in the bar that supplies chain oil to the chain. This groove or hole can become clogged with dust when used in harsh working conditions for a long time and sometimes requires cleaning.

US Patent Application Publication No. 2001/0042311 US Pat. No. 5,497,557

  The object of the present invention is to provide an improvement which eliminates at least some of the above-mentioned drawbacks in existing devices.

  This object is achieved by an apparatus for attaching a bar of a hand-held power tool, such as a chainsaw, to the tool body as described in claim 1 of the present invention. The apparatus has at least one first portion having a first portion fixedly disposed on the main body and a second portion having an engaging portion extending from the main body and engaging with the second engaging means. 1 engaging means, a cover part that abuts the bar so that the bar is interposed between the cover part and the main body, and at least one second engaging means moored to the cover part, The second engaging means engages with the engaging portion of the first engaging means, fixes the bar between the cover portion and the main body, and has a rotation axis. The second engaging means is configured to move in the direction of the rotation axis of the second engaging means along the engaging portion of the first engaging means by a first distance (A), Fix the bar between the main body. When the first engaging means and the second engaging means are not engaged, the second engaging means sets the second distance (B) longer than the first distance (A) to the second The engaging means is moored to the cover portion so as to be movable with respect to the cover portion in the rotation axis direction.

  Preferably, when the first engaging means and the second engaging means are not engaged and the cover portion is removed from the main body, the second engaging means is set to the first distance ( A) A longer second distance (B) is tethered to the cover part so as to be movable relative to the cover part in the direction of the rotation axis of the second engagement means.

  Since the second engaging means is anchored to the cover portion in this manner, the cover portion is pressed in the direction of the bar when the operator puts the cover portion on the first engaging means. It is possible to pinch the bar between the cover part and the tool body before starting to engage the means with the first engaging means. Therefore, by using the second engaging means moored to the cover portion, the cover portion can be easily attached to the bar. This solution also ensures that the cover can be accurately attached to the main body, which is particularly difficult when the brake is mounted in the cover.

  According to one embodiment of the present invention, the cover portion is directed to the main body side when the cover portion is attached to the main body, and is directed in the opposite direction to the main body when the cover portion is attached to the main body. And an outer surface. The cover portion further has a through hole extending between the inner side surface and the outer side surface to receive the second portion of the first engaging means. The cover portion further comprises at least one recess to which the attachment portion of the second engagement means is attached to anchor the second engagement means to the cover portion.

  By providing such a recess and a through hole in the cover part, the nut can be moored to the cover part, and the nut has a certain play in the rotation axis direction of the nut with respect to the cover part in the moored state. it can.

  According to another embodiment of the present invention, the cover portion has guide means for guiding the first engagement means to the second engagement means. As a result, the cover part is accurately guided to the first attachment means. This is because when the first attachment means is inserted into the guide means, the first attachment means is guided to the second attachment means, and as a result, the cover portion can be correctly arranged on the main body. It becomes possible.

  According to yet another embodiment of the invention, at least a portion of the through hole has a cross-sectional dimension that is substantially the same as the cross-sectional dimension of the first engagement means. Therefore, the inner wall of the through hole serves as a guiding means for guiding the first engaging means to the second engaging means.

  According to still another embodiment of the present invention, at least one recess of the cover portion is disposed independently of the through hole. As a result, the second distance (B), that is, the distance at which the second engagement means can move with respect to the cover portion is increased, and the first engagement means is changed to the second engagement means. The full length of the through hole can be used as the guiding means for guiding.

  According to a modification of the still another embodiment, the second engaging means includes a holder part and an engaging part, and the engaging part is rotatably attached to the holder part. Since the engaging portion is rotatably attached to the holder portion, the holder portion does not need to be rotatable and can be anchored to the cover portion. For this reason, the cover portion does not need to allow rotational movement in the cover portion of the holder portion, so that the free space required for the second engagement means in the cover portion becomes smaller.

  According to another variation of the further alternative embodiment, at least one attachment portion of the holder portion of the second engagement means has an elastic structure. Thereby, since the holder part snap-fits into at least one recess of the cover part, the second engaging means can be quickly attached to the cover part in the moored state.

  According to yet another variant of the further embodiment, the at least one attachment part comprises at least three attachment parts that cooperate with at least three independent recesses of the cover part. Thereby, regardless of the structural tolerance of the cover part and the nut, the concave part and the attaching part of the nut can be fitted closely.

  According to yet another embodiment of the present invention, the at least one recess for anchoring the second engagement means to the cover part is a part of the through hole for receiving the first engagement means. Therefore, the concave portion and the through hole become the same hole, and the manufacture of the cover portion is simplified.

  According to a modification of the above yet another embodiment, the mounting portion of the second engaging means includes a protruding portion extending in a direction away from the rotation axis of the second engaging means, and the cover portion includes the second portion. A protrusion extending in the rotation axis direction of the engaging means. Since these protrusions are configured to cooperate, the second engaging means is anchored to the cover part. This makes it possible to anchor the nut to the cover part in a cost-effective manner.

  According to another variation of the above yet another embodiment, the cover portion has a base portion and a plate portion, the plate portion is attached to the base portion by an attachment device, and the protruding portion of the cover portion is the plate. Part of the department. Thereby, attachment in the moored state to the cover part of a nut becomes easy. Also, it is easy to replace defective nuts.

  According to a further embodiment of the invention, the attachment device comprises at least two first engagement means and at least two second engagement means, each of the at least two second engagement means. Are each configured to cooperate with one of the at least two first engaging means. By using an attachment device for a tool having at least two first engaging means and corresponding second engaging means according to the present invention, the user corresponds to one second engaging means. After full engagement with the first engagement means, another second engagement means can be engaged with the corresponding first engagement means. As a result, the cover part can be easily attached to the main body. Similarly, when removing the cover portion from the main body, after removing one second engaging means from the first engaging means, the remaining second engaging means is associated with the corresponding first engaging means. The cover part can be easily detached from the main body.

  According to another aspect of the present invention, a hand-held power tool such as a chain saw is required. The tool includes a main body, a bar, and the attachment device of the present invention.

The present invention will be described in more detail below with reference to the accompanying drawings.
1 is a cross-sectional view of a part of a chainsaw including a first embodiment of the present invention. 1 is a cross-sectional view of a part of a chainsaw including a first embodiment of the present invention. It is a perspective view of the nut by a 1st embodiment of the present invention. It is sectional drawing of 2nd Embodiment of this invention.

  The present invention will be described in more detail below with reference to the accompanying drawings showing preferred embodiments of the present invention. However, the invention can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like reference numbers indicate like elements.

  Two preferred embodiments of a mounting device for a hand-held power tool will be described with reference to FIGS. In these embodiments, the hand-held power tool is a chainsaw having a body and a chain guide bar, which conventionally supports and guides the saw chain in a groove at the periphery of the bar. The saw chain is driven by a sprocket covered by a cover part. The main body is provided with an engine for driving the sprocket via a driving device. The guide bar extends forward in the longitudinal direction of the chain saw, and the rear end of the bar is clamped between the main body and the cover part by a tightening device.

  A first embodiment of the present invention is shown in FIGS. 1 and 2 show a portion of a chainsaw that includes the present invention. The cover portion 14 fastens and fixes the guide bar 1 to the main body 2 by a tightening device including the two connecting portions 10 and 20. Each connecting portion includes first engaging means 3 and second engaging means 15. The first engaging means 3 is a bolt, and the second engaging means 15 is a nut.

  Each bolt 3 has a first portion 3a and a second portion 3b. The first portion 3a is fixed to the main body 2 by, for example, press-fitting, and the second portion 3b passes through the hole of the guide bar 1 and the hole 14c of the cover portion 14 in a direction perpendicular to the guide bar plane from the main body. Extend. The cover portion 14 has an inner side surface 14a directed toward the main body 2 and an outer side surface 14b directed in a direction opposite to the main body. The threaded portion 3c of the second bolt portion 3b serving as an engaging portion for engaging the nut with the bolt projects at least partially from the outer surface 14 of the cover portion. In order to clamp the bar 1 between the cover part 14 and the main body 2, the nut 15 is engaged with the screw part 3 c of the bolt 3 and tightened.

  1 and 2 shows a state in which the nut 15 and the bolt 3 are not engaged, but the nut is connected to the holder portion 14 in an anchored state.

  1 and FIG. 2, the nut 3 and the bolt 15 are engaged with each other, and the nut 15 is tightened so that the connection portion firmly holds the bar 1 between the main body 2 and the cover portion 14. Indicates the state.

  In FIG. 2, reference symbol A is a first distance which is the length of the screw engagement between the bolt 3 and the nut 15, i.e., to firmly hold the bar 1 between the main body 2 and the cover portion 14. The distance by which the nut 15 moves in the direction of the nut rotation axis X while being screw-engaged with the bolt 3 is shown. When the nut is not engaged with the bolt, the nut can move the second distance B with respect to the cover portion 14 in the nut rotation axis X direction. In FIG. 2, the second distance B is equal to the distance in the nut rotation axis X direction between the position of the nut 15 on the left side of the figure and the position of the nut 15 on the right side of the figure. Since the second distance B is equal to or longer than the first distance A, it is possible to remove the nuts 15 one by one when removing the cover from the main body.

  The nut 15 includes a hollow main body portion 15b having an internal thread, and the main body portion is rotatably attached to the holder portion 15a as shown in FIG. The main body 15b rotates about the nut rotation axis X with respect to the holder 15a.

  The holder portion 15a includes a substantially circular portion that comes into contact with the main body portion 15b, and three attachment portions 15c that are formed as legs extending from the periphery of the substantially circular portion. The leg portion 15c is flat and extends in a direction away from the main body portion 15b substantially parallel to the nut rotation axis X.

  In each leg 15c, the slot extends from the end of each leg far from the main body toward the main body 15b to a point between the end of the leg 15c and the substantially circular portion of the holder 15a. Thus, a part of each leg 15c is divided into two parallel parts by the slot. Each parallel portion has a hook-shaped protrusion 15d at its end.

  The cover portion 14 has an elongated recess 14e that receives the leg portion 15c of the nut holder portion 15a. There is one independent recess 14e for each leg 15c. The recess 14e is provided separately from the through hole 14c of the cover portion, and the through hole 14c is provided for receiving the bolt 3. The outer surface 14b of the cover part 14 has a protruding part 14d arranged so as to cooperate with the hook 15d of the leg part 15c of the nut holder part. By making the width of the opening of the concave portion 14e smaller than the width at the position of the hook 15d of the leg portion 15c of the nut holder portion by the interval between the projecting portions 14d, the leg portion 15c of the holder portion is placed in the concave portion 14e. Tethered. The depth of each recess 14e is equal to or greater than the length of the holder leg 14c. According to another embodiment, the recess 14e may extend from the outer surface 14a to the inner surface 14b of the main body. That is, the recess may be a through hole.

By providing a slot in each leg portion 15c, the structure of the leg portion 15c of the nut holder portion has elasticity. The outer ends of the two parallel parts can be pressed in the direction of each other, and the leg can be snapped into the opening of the recess 14e in the cover. Once inserted into the recess, the leg portion 15c returns to its original shape. By the leg portion 15 c, the nut 15 can move in the direction of the rotation axis X of the nut with respect to the cover portion 14. When the hook 15d of the leg portion reaches the protruding portion 14d of the cover portion 14, the protruding portion 14d stops the movement of the nut 15 in cooperation with the hook 15d. In this way, the nut 15 is anchored to the cover part 14.
1 to 3, the nut holder portion 15a has three leg portions 15c, and three concave portions 14e of the cover portion 14 that receive the leg portions 15c are provided. The number of leg portions 15c and corresponding recesses 14e may be one, two, four, or more.

  The cross section in FIG. 1 is along a plane intersecting the center of the bolt 3. The cross section in FIG. 2 is parallel to the cross section in FIG. 1 and is along a plane intersecting the leg portion 15c of the nut holder portion 15a.

  When the operator of the tool using the apparatus shown in FIGS. 1 to 3 wants to replace the bar 1, the operator first removes the nut 15. Thanks to the second distance B being longer than the first distance A, ie the length of the screw engagement, the nuts 15 can be loosened and removed one by one. When the nut is removed, the nut 15 that is anchored to the cover together with the cover portion 14 is removed from the chain saw. Thereafter, the operator removes the old bar 1 from the body 2 and the bolt 3 of the clamping device and places the new bar 1 on the bolt 3 through the second part 3b of the bolt in the hole of the new bar 1.

  After the new bar 1 is disposed on the bolt 3, the cover portion 14 is disposed on the bolt 3 by passing the bolt through the through hole 14 c of the cover portion. Since the through hole 14c of the cover part also serves as a guide means for guiding the cover part 14 onto the bolt 3, the cover part 14 is in the correct position, and the nut 15 is the end of the second part 3b of the bolt. Correctly positioned. In a chain saw in which brake parts such as a brake band (not shown) for kickback guard are mounted on the cover part, it is important to increase the placement accuracy of the cover part 14. When the cover portion 14 is attached to the bolt 3 of the main body 2, the through hole 14 c of the cover portion 14 is guided by the second portion 3 b of the bolt 3. The diameter of the second portion 3b of the bolt 3 and the diameter of the through-hole 14c are adjusted so that they are closely fitted and thereby sufficiently guided in order to increase the placement accuracy of the cover portion 4. Is preferred. According to this embodiment, the arrangement accuracy of the cover portion 14 is further improved by the relatively long contact area indicated by the distance C in FIG.

  Since the nut 15 is moored to the cover portion 14 so as to be movable with respect to the cover portion 14 in the direction of the nut rotation axis X in the second distance B longer than the first distance A, the cover 14 is bolt 3 It is possible to place the cover 14 against the bar 1 and the body 2 before tightening the nut 15. This method facilitates accurate placement of the bar between the cover and the body.

  The cover 14 is placed on the bolt 3, the bar 1 is pressed against the main body 2 by the cover 14, and then the nut 15 is screw-engaged with the bolt 3 to tighten the nut 15.

  Another embodiment of the present invention is shown in FIG. As in the embodiment described with reference to FIGS. 1 to 3, the cover portion 4 fastens and fixes the guide bar 1 to the main body 2 by a tightening device including two connecting portions 10 and 20. Each connecting portion includes first engaging means 3 and second engaging means 5. The first engaging means 3 is a bolt, and the second engaging means 5 is a nut.

  4 shows a state where the nut 5 is engaged with the bolt 3 and the bar 1 is firmly held between the cover portion 4 and the main body 2. 4 shows a state in which the nut 5 and the bolt 3 are not engaged with each other, but the nut is connected to the cover portion 4 in an anchored state.

  In the second embodiment, the bolt 3 may be the same as the bolt described with reference to FIGS. Each bolt has a first portion 3a fixed to the main body 2 and a second portion 3b extending from the main body through the holes of the guide bar 1 and the holes 4c and 4g of the cover portion 4. The cover part 4 has an inner surface 4a directed to the main body side and an outer surface 4b directed in the direction opposite to the main body.

  Unlike the embodiment described with reference to FIGS. 1 to 3, the plate 4 f is attached to the outer surface 4 b of the cover part by screws 6. The second portion 3b of the bolt extends through the hole in the plate 4f. The screw portion 3c of the second bolt portion 3b protrudes from the plate 4f in a direction away from the cover portion 4. In order to hold the bar 1 between the cover part 4 and the main body 2, the nut 5 is engaged with the screw part 3 c of the bolt 3 and tightened.

  The nut 5 includes an inner screw main body portion 5c that engages with the screw portion 3c of the bolt. The inner screw main body is provided with a flange 5d that comes into contact with the plate 4f when the nut 5 is tightened. In order to allow movement of the nut 5 in the nut rotation axis X direction, the nut further includes an attachment portion 5a formed as a neck portion inserted through the through holes 4c and 4g of the cover portion 4. The neck portion protrudes from the main body portion in the direction away from the main body portion 5c starting from the flange 5d in the nut rotation axis X direction. The neck portion 5a has a protruding portion 5b formed as a flange at the end far from the flange 5d. The protrusion 5b is configured to cooperate with at least one edge 4d of the hole in the plate 4f, and this at least one edge reduces the diameter of the hole in the plate 4f so that the nut remains anchored to the cover part 4. Determine. The nut 5 configured in this way can be manufactured fairly easily and has few manufacturing errors.

  The holes 4 c and 4 g of the cover part have two parts, that is, an inner part 4 g closest to the inner side surface 4 a of the cover part 4 and an outer side part 4 c closest to the outer side surface 4 b of the cover part 4. The diameter of the inner part 4g is smaller than the diameter of the outer part 4c. The outer portion 4c constitutes a recess in the holes 4c and 4g. More specifically, the diameter of the inner portion 4g is equal to or slightly larger than the diameter of the second portion 3b of the bolt, and the diameter of the outer portion 4c is the diameter of the protruding portion 5b of the nut neck portion 5a. Is greater than or equal to The outer part 4c of the holes 4c, 4g has a larger diameter than the inner part 4g so that it can receive the nut neck part 5a provided with the protruding part 5b.

  The inner part 4g of the present embodiment also serves to guide the cover part 4. In a chain saw in which brake parts such as a brake band (not shown) for kickback guard are mounted on the cover part, it is important to increase the placement accuracy of the cover part 4. When the cover portion 4 is attached to the bolt 3 of the main body 2, the inner portions 4 g of the holes 4 c and 4 g are guided by the second portion 3 b of the bolt 3. The diameter of the second part 3b of the bolt 3 and the diameter of the inner part 4g of the holes 4c, 4g are such that they fit closely together and thereby provide sufficient guidance in order to increase the placement accuracy of the cover part 4. It is preferable to be adjusted to.

  Since the diameter of the hole of the plate 4f is slightly smaller than the diameter of the outer part 4c of the through hole 4c, 4g of the cover part 4, the edge 4d of the hole of the plate 4f has an opening of the hole 4c, 4g of the cover part 4. Cover partially.

  4, when the nut 5 is loosened and the engagement with the screw portion 3c of the bolt is released, the diameter of the protruding portion 5b is slightly larger than the diameter of the hole of the plate 4f. The nut 5 remains connected to the cover part 4.

  In FIG. 4, reference symbol A is a first distance, which is the length of the screw engagement between the bolt 3 and the nut 5, i.e., to firmly hold the bar 1 between the main body 2 and the cover portion 14. The distance by which the nut 15 moves in the direction of the nut rotation axis X while being screw-engaged with the bolt 3 is shown. When the nut is not engaged with the bolt, the nut engages with the cover portion 4 in a state in which the nut can move with respect to the cover portion 4 in the nut rotation axis X direction by the second distance B. 4, the second distance B is equal to the distance in the nut rotation axis X direction between the position of the nut 5 of the connecting portion 10 on the left side of the drawing and the position of the nut 5 of the connecting portion 20 on the right side of the drawing. . Since the second distance B is equal to or longer than the first distance A, the nuts 5 can be removed separately one by one. Reference symbol C indicates the thickness of the cover portion 4, that is, the distance between the outer surface 4b and the inner surface 4a of the cover portion.

  The wall of the inner portion 4g of the through hole serves as a guide means for guiding the bolt 3 toward the nut 5 when the cover portion 4 is put on the bolt 3, and the bar 1 is formed between the cover portion 4 and the main body 2. Sandwiched between. Reference symbol D indicates the length in the nut rotation axis X direction of the inner portions 4g of the through holes 4c and 4g of the cover portion 4 serving as a guide means, that is, the guide length.

  According to one embodiment, the holes in the plate 4f may be oval having a minimum diameter equivalent to the diameter between the edges 4d of the plate 4f and a maximum diameter larger than the diameter of the nut neck portion 5a in the protrusion 5b. . Thereby, when the plate 4f is not attached to the outer surface 4b of the cover part 4, it is inserted into the hole of the plate 4f having a diameter equal to or larger than the diameter of the nut neck part 5a in the protruding part 5b. The nut neck 5a can be inserted by tilting the nut 5 with respect to the plate 4f. When the plate is attached to the cover portion with the screw 6, the plate abuts on the outer surface 4b of the cover portion 4 and the nut neck portion 5a extends into the holes 4c and 4g. Moored.

  In another embodiment, the holes in the plate 4f may be circular with a diameter equivalent to the distance between the plate edges 4d. A slot extending in the direction of the nut rotation axis X may be provided in the nut neck so that the nut neck 5a can be inserted into the hole of the plate 4f, and the nut neck 5a has a structure having elasticity by the slot. Become. By doing so, the nut neck portion 5a can be compressed and snapped into the hole of the plate 4f. Once inserted, the nut neck 5a returns to its original shape, and the nut 5 is connected to the plate 4f in an anchored state.

  The plate 4f may be a separate plate, or may be a component that already exists in a hand-held power tool, such as a chain saw spike or spike bumper.

  Other embodiments of the invention are possible. For example, the mounting device can have only one bolt and one nut.

  As mentioned above, although the tool has been described as a chain saw, the tool can be any kind of hand-held type in which a bar is sandwiched between a cover and a main body, such as a hedge trimmer, a clearing saw, a trimmer, a pole saw, and an electric cutter. An electric tool may be used.

  In the drawings and specification, there have been disclosed preferred embodiments of the invention. Although specific terms were used, they were used in a general and descriptive sense only and not for purposes of limitation. The scope of the invention is set forth in the appended claims.

Claims (3)

A device for attaching the hand-held power tool bar (1) to the tool body (2),
At least one first engaging means (3), a first part (3a) fixedly arranged on the main body (2), and a second engaging means (5) extending from the main body ) And a second portion (3b) having an engaging portion (3c) that engages with the first engaging means (3),
A cover part (4) abutting on the bar (1) so as to interpose the bar (1) between the cover part (4) and the main body (2);
At least one second engaging means (5) moored to the cover part (4), which is engaged with the engaging part (3c) of the first engaging means (3) to cover the cover part (4) And a second engaging means having a rotation axis (X) for fixing the bar (1) between the main body (2) and
The second engaging means has a first distance (A) along the engaging portion (3c) of the first engaging means (3) and the rotation axis (X) of the second engaging means (5). In the device configured to move in a direction and fixing the bar (1) between the cover part (4) and the body (2),
When the first engaging means (3) and the second engaging means (5) are not engaged, the second engaging means (5) is a second longer than the first distance (A). The second engagement means (5) is moved to the cover portion (4) in the direction of the rotation axis (X) of the second engagement means (5). Moored at (4),
The cover (4) has an inner surface (4a) facing the main body when the cover is disposed on the main body (2), and a direction opposite to the main body when the cover is disposed on the main body (2). And the cover portion (4) further extends between the inner side surface and the outer side surface to extend the second portion (3b) of the first engaging means (3). The cover portion (4) further includes at least one concave portion (4c), and the attachment portion (5a) of the second engaging means is the second in the concave portion (4c). Arranged to moor the engagement means of the cover portion,
At least one recess (4c) for anchoring the second engaging means to the cover part (4) is formed in a through hole (4c, 4g) provided for receiving the first engaging means (3). Part of
The recess (4c) is an outer portion of the through hole extending from the outer surface (4b) of the cover portion toward the inner surface (4a), and the recess (4c) is larger than the diameter of the inner portion (4g) of the through hole. A device characterized by having a large diameter.   The attachment portion (5a) of the second engagement means includes a protrusion (5b) extending in a direction away from the rotation axis (X) of the second engagement means, and the cover portion (4) is the second engagement portion. A protrusion (4d) extending in a direction approaching the rotation axis (X) of the coupling means, and the protrusions (5b, 4d) are used to anchor the second engagement means (5) to the cover part (4). The device according to claim 1, wherein the device is arranged to cooperate. A device for attaching the hand-held power tool bar (1) to the tool body (2),
At least one first engaging means (3), a first part (3a) fixedly arranged on the main body (2), and a second engaging means (5) extending from the main body ) And a second portion (3b) having an engaging portion (3c) that engages with the first engaging means (3),
A cover part (4) abutting on the bar (1) so as to interpose the bar (1) between the cover part (4) and the main body (2);
At least one second engaging means (5) moored to the cover part (4), which is engaged with the engaging part (3c) of the first engaging means (3) to cover the cover part (4) And a second engaging means having a rotation axis (X) for fixing the bar (1) between the main body (2) and
The second engaging means has a first distance (A) along the engaging portion (3c) of the first engaging means (3) and the rotation axis (X) of the second engaging means (5). In the device configured to move in a direction and fixing the bar (1) between the cover part (4) and the body (2),
When the first engaging means (3) and the second engaging means (5) are not engaged, the second engaging means (5) is a second longer than the first distance (A). The second engagement means (5) is moved to the cover portion (4) in the direction of the rotation axis (X) of the second engagement means (5). Moored at (4),
The cover part (4) faces the inner surface (4a) facing the main body side when the cover part is disposed on the main body (2) and the opposite direction of the main body when the cover part is disposed on the main body (2). And the cover portion (4) further extends between the inner surface and the outer surface to receive the second portion (3b) of the first engagement means (3). It has through holes (4c, 4g), the cover part (4) further has at least one recess (4c), and the mounting part (5a) of the second engaging means serves as the second engaging means. Arranged to moor on the cover part,
At least one recess (4c) for anchoring the second engaging means to the cover part (4) is a part of the through hole (4c) provided for receiving the first engaging means (3). And
The cover part (4) has a plate part (4f) attached to the outer surface (4b) by the attachment device (6), and the protruding part (4d) of the cover part is a part of the plate part (4f). A device characterized by.

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