JP7421374B2 - extension handle - Google Patents

Description

The technology disclosed herein relates to extension handles.

Patent Document 1 discloses an extension handle that is used by being attached to a power tool. The extension handle includes an extension part that holds the electric tool, a relay part that is connected to the extension part and includes a grip member that is gripped by a user, and a relay part that is provided near the grip member and that holds the electric tool. The tool includes an operation section that receives an operation from the user to operate the tool, and an arm support section that is connected to the relay section and includes a cuff member that comes into contact with the arm of the user.

China Utility Model No. 205224619

In the extension handle of Patent Document 1, the position and angle of the arm support section relative to the relay section cannot be adjusted, so the relative positional relationship between the gripping member and the cuff member is fixed. For this reason, depending on the user's physique and posture during work, when the user grips the gripping member and performs the work, the cuff member may not contact the user's arm well, making it impossible to work stably. There are cases. The present specification provides a technique that allows changing the relative positional relationship of a cuff member to a gripping member in an extension handle that is attached to and used in a power tool.

An extension handle is disclosed herein. The extension handle may be used by being attached to a power tool. The extension handle includes an extension part that holds the electric tool, a relay part that is connected to the extension part and includes a grip member that is gripped by a user, and a relay part that is provided near the grip member and that holds the electric tool. The tool may include an operation section that receives an operation from the user to operate the tool, and an arm support section that is rotatably connected to the relay section and includes a cuff member that comes into contact with the user's arm. .

According to the above extension handle, the relative positional relationship of the cuff member to the gripping member can be changed by rotating the arm support part with respect to the relay part. Regardless of the user's physique or working posture, the cuff is attached to the gripping member so that the cuff member properly contacts the user's arm when the user grips the gripping member and performs the work. The relative positional relationship of the members can be adjusted.

Another extension handle is also disclosed herein. The extension handle may be used by being attached to a power tool. The extension handle includes an extension part that holds the electric tool, a relay part that is connected to the extension part and includes a grip member that is gripped by a user, and a relay part that is provided near the grip member and that holds the electric tool. an arm support section including an operation section that receives an operation from the user to operate a tool; and a cuff member that contacts the user's arm, the arm support section movable along the longitudinal direction of the arm support section; The arm support section may include an arm support section connected to the arm support section.

According to the extension handle described above, the relative positional relationship of the cuff member with respect to the gripping member can be changed by moving the arm support part relative to the relay part along the longitudinal direction of the arm support part. Regardless of the user's physique or working posture, the cuff is attached to the gripping member so that the cuff member properly contacts the user's arm when the user grips the gripping member and performs the work. The relative positional relationship of the members can be adjusted.

FIG. 2 is a perspective view showing a state in which an extension handle 100 according to the first embodiment is attached to a reinforcing bar binding machine 2. FIG. FIG. 2 is a perspective view of the reinforcing bar binding machine 2 according to the first embodiment, seen from the upper left rear. FIG. 2 is a perspective view of the internal structure of the main body portion 4 of the reinforcing bar binding machine 2 according to the first embodiment, viewed from the upper right rear side. FIG. 2 is a sectional view of the front portion of the main body portion 4 of the reinforcing bar tying machine 2 according to the first embodiment. FIG. 2 is a perspective view of the internal structure of the main body part 4 and the upper part of the grip part 6 of the reinforcing bar binding machine 2 according to the first embodiment, seen from the upper left front. FIG. 3 is a sectional view of the vicinity of the front end of the extension pipe 104 of the extension handle 100 according to the first embodiment. FIG. 3 is a sectional view of the vicinity of the handle housing 108 of the extension handle 100 according to the first embodiment. FIG. 2 is a perspective view of a connecting portion 111 and a support pipe 112 of the extension handle 100 according to the first embodiment. FIG. 3 is a cross-sectional view of the extension handle 100 in the vicinity of the connecting portion 111 according to the first embodiment. 7 is a side view showing an example of the relative positional relationship between the gripping member 142 and the cuff member 114 in the extension handle 100 according to the first embodiment. FIG. 7 is a side view showing another example of the relative positional relationship between the gripping member 142 and the cuff member 114 in the extension handle 100 according to the first embodiment. FIG. 7 is a side view showing still another example of the relative positional relationship between the gripping member 142 and the cuff member 114 in the extension handle 100 according to the first embodiment. FIG. 7 is a side view showing still another example of the relative positional relationship between the gripping member 142 and the cuff member 114 in the extension handle 100 according to the first embodiment. FIG. FIG. 3 is a perspective view showing a state in which an extension handle 200 according to a second embodiment is attached to a reinforcing bar binding machine 2. FIG. FIG. 3 is a perspective view of the gripping member 212, the connecting portion 205, and the support pipe 112 of the extension handle 200 according to the second embodiment. FIG. 3 is a cross-sectional view of the extension handle 200 in the vicinity of the connecting portion 205 according to the second embodiment. 7 is a side view showing an example of the relative positional relationship between the gripping member 212 and the cuff member 114 in the extension handle 200 according to the second embodiment. FIG. 7 is a side view showing another example of the relative positional relationship between the gripping member 212 and the cuff member 114 in the extension handle 200 according to the second embodiment. FIG. 7 is a side view showing still another example of the relative positional relationship between the gripping member 212 and the cuff member 114 in the extension handle 200 according to the second embodiment. FIG. 7 is a side view showing still another example of the relative positional relationship between the gripping member 212 and the cuff member 114 in the extension handle 200 according to the second embodiment. FIG. FIG. 2 is a perspective view of the vicinity of the front end of the extension handle 100 according to the first embodiment. 7 is a perspective view showing a state in which an extension handle 100 according to a modification of the first embodiment is attached to a reinforcing bar binding machine 2. FIG. 7 is a perspective view of the vicinity of the front end of an extension handle 100 according to a modification of the first embodiment. FIG. 7 is a side view of the vicinity of the rear end of the extension handle 100 according to a modification of the first embodiment. FIG. 7 is a rear view showing the positional relationship between the extension pipe 104, the handle housing 108, and the auxiliary grip 190 of the extension handle 100 according to a modification of the first embodiment. FIG. 7 is a perspective view of the vicinity of the rear end of the extension handle 100 according to another modification of the first embodiment. FIG. 7 is a perspective view of the vicinity of the rear end of the extension handle 100 according to yet another modification of the first embodiment. FIG. 7 is a perspective view of the vicinity of the rear end of the extension handle 100 according to yet another modification of the first embodiment. FIG. 7 is a side view of the vicinity of the rear end of the extension handle 100 according to yet another modification of the first embodiment. FIG.

In one or more embodiments, the extension handle may be used attached to a power tool. The extension handle includes an extension part that holds the electric tool, a relay part that is connected to the extension part and includes a grip member that is gripped by a user, and a relay part that is provided near the grip member and that holds the electric tool. The tool may include an operation section that receives an operation from the user to operate the tool, and an arm support section that is rotatably connected to the relay section and includes a cuff member that comes into contact with the user's arm. .

According to the above extension handle, the relative positional relationship of the cuff member to the gripping member can be changed by rotating the arm support part with respect to the relay part. Regardless of the user's physique or working posture, the cuff is attached to the gripping member so that the cuff member properly contacts the user's arm when the user grips the gripping member and performs the work. The relative positional relationship of the members can be adjusted.

In one or more embodiments, the arm support part may be coupled to the relay part so as to be movable along the longitudinal direction of the arm support part.

In one or more embodiments, the extension handle may be used attached to a power tool. The extension handle includes an extension part that holds the electric tool, a relay part that is connected to the extension part and includes a grip member that is gripped by a user, and a relay part that is provided near the grip member and that holds the electric tool. an arm support section including an operation section that receives an operation from the user to operate a tool; and a cuff member that contacts the user's arm, the arm support section movable along the longitudinal direction of the arm support section; The arm support section may include an arm support section connected to the arm support section.

According to the extension handle described above, the relative positional relationship of the cuff member with respect to the gripping member can be changed by moving the arm support part relative to the relay part along the longitudinal direction of the arm support part. Regardless of the user's physique or working posture, the cuff is attached to the gripping member so that the cuff member properly contacts the user's arm when the user grips the gripping member and performs the work. The relative positional relationship of the members can be adjusted.

In one or more embodiments, the arm support may further include a support beam to which the cuff member is secured. The support beam may be connected to the relay part so as to be movable along the longitudinal direction of the support beam.

If the cuff member is configured to be movable relative to the support beam, when the cuff member is moved in a direction approaching the gripping member, the support beam may protrude beyond the cuff member toward the side closer to the user's body. , which may interfere with the user's work. As mentioned above, if the cuff member is fixed to the support beam and the support beam is movable relative to the relay part, when the cuff member is moved in the direction approaching the gripping member, the support beam Since it protrudes beyond the relay part and away from the user's body, it does not interfere with the user's work. User convenience can be improved.

In one or more embodiments, the extension handle may further include a connection part that connects the support beam and the relay part. The connecting portion includes a sheath portion having a shape that partially covers the outer circumferential surface of the support beam, a first protrusion extending from one circumferential end of the sheath portion, and the other circumferential end of the sheath portion. The connecting member may include a second protruding portion extending from an end of the connecting member, and an adjusting member that adjusts the distance between the first protruding portion and the second protruding portion. When the adjustment member widens the distance between the first protrusion and the second protrusion, movement of the support beam in the longitudinal direction with respect to the relay portion of the support beam may be allowed. When the adjustment member narrows the distance between the first protrusion and the second protrusion, movement of the support beam in the longitudinal direction with respect to the relay portion of the support beam may be prohibited.

According to the above configuration, by adjusting the interval between the first protrusion and the second protrusion, the magnitude of the frictional force acting between the sheath part and the support beam can be switched. With a simple configuration, the support beam can be switched between a movable state and an immovable state with respect to the relay section.

In one or more embodiments, the gripping member may rotatably support the coupling member. The relay section may further include a support member whose position relative to the gripping member is fixed. The adjustment member may include a first adjustment member and a second adjustment member that sandwich the support member, the first protrusion, and the second protrusion. When the distance between the first adjustment member and the second adjustment member is increased, movement of the support beam along the longitudinal direction with respect to the relay portion of the support beam may be allowed, and Rotation relative to the relay portion may be allowed. When the distance between the first adjustment member and the second adjustment member is narrowed, movement of the support beam along the longitudinal direction with respect to the relay portion of the support beam may be prohibited, and Rotation relative to the relay section may be prohibited.

According to the above configuration, by adjusting the interval between the first adjustment member and the second adjustment member, a state in which both rotation of the support beam and movement along the longitudinal direction of the support beam are allowed, and a state in which the support beam It is possible to switch between a state in which both the rotation of the support beam and the movement of the support beam along the longitudinal direction are prohibited. Further, according to the above configuration, the connecting member is rotatable with respect to the gripping member, and the frictional force for fixing the connecting member is applied from the supporting member, so that the position of the rotational axis and the frictional force are The operating positions can be placed apart. Thereby, even if a large moment acts on the support beam in a state where the support beam is fixed to the relay section, it is possible to prevent the support beam from rotating relative to the relay section.

In one or more embodiments, the support member may be positioned between the gripping member and the power tool.

According to the above configuration, when the user performs work, the user's hand holding the gripping member can be protected by the support member.

In one or more embodiments, the gripping member may rotatably support the coupling member. The adjustment member may include a first adjustment member and a second adjustment member that sandwich the gripping member, the first protrusion, and the second protrusion. When the distance between the first adjustment member and the second adjustment member is increased, movement of the support beam along the longitudinal direction with respect to the relay portion of the support beam may be allowed, and Rotation relative to the relay portion may be allowed. When the distance between the first adjustment member and the second adjustment member is narrowed, movement of the support beam along the longitudinal direction with respect to the relay portion of the support beam may be prohibited, and Rotation relative to the relay section may be prohibited.

According to the above configuration, by adjusting the interval between the first adjustment member and the second adjustment member, a state in which both rotation of the support beam and movement along the longitudinal direction of the support beam are allowed, and a state in which the support beam It is possible to switch between a state in which both the rotation of the support beam and the movement of the support beam along the longitudinal direction are prohibited. Further, according to the above configuration, the configurations of the relay section and the connecting section can be simplified.

In one or more embodiments, the power tool may be a rebar tying machine.

When attaching an extension handle to a rebar tying machine and using it in a downward direction, it is necessary to swing up the extension handle each time you perform tying work. According to the extension handle described above, the relative positional relationship of the cuff member to the gripping member can be adjusted so that the cuff member appropriately contacts the user's arm, so that the extension handle can be easily swung up. Can be done.

In one or more embodiments, the extension handle is removably attached to the relay section, and further includes an auxiliary grip that is held by a hand other than the user's hand that grips the gripping member. You may be prepared.

According to the above configuration, the user can grip the gripping member with one hand and the auxiliary grip with the other hand, thereby reducing the burden on the hand that grips the gripping member. . In addition, even when using the extension handle without the cuff member touching the user's arm, the user can grasp the grip member with one hand and the auxiliary grip with the other hand, so the extension handle can be held stably.

In one or more embodiments, the auxiliary grip may be located on an opposite side of the gripping member from the extension when looking at the extension handle from a longitudinal direction of the extension.

According to the above configuration, when the user grips the grip member with one hand and grips the auxiliary grip with the other hand, the extension handle can be stably held.

In one or more embodiments, the extension handle may be used attached to a power tool. The extension handle includes an extension part that holds the electric tool, a relay part that is connected to the extension part and includes a grip member that is gripped by a user, and a relay part that is provided near the grip member and that holds the electric tool. an operation section that accepts an operation from the user to operate the tool; and an auxiliary grip that is detachably attached to the relay section and that is grasped by a hand other than the user's hand that grasps the gripping member. It may further include.

According to the above configuration, the user can grip the gripping member with one hand and the auxiliary grip with the other hand, thereby reducing the burden on the hand that grips the gripping member. .

(Example 1)
As shown in FIG. 1, the extension handle 100 of this embodiment is used by being attached to a reinforcing bar binding machine 2.

(Configuration of reinforcing bar binding machine 2)
As shown in FIG. 2, the reinforcing bar binding machine 2 is a power tool for binding a plurality of reinforcing bars R, which are objects to be bound, using wires W, which are binding wires. The reinforcing bar binding machine 2 includes a housing 3. The housing 3 includes a main body part 4 , a grip part 6 provided at the bottom of the main body part 4 , and a battery attachment part 8 provided at the bottom of the grip part 6 . A battery B is removably attached to the lower part of the battery attachment part 8. The main body portion 4, the grip portion 6, and the battery attachment portion 8 are integrally formed.

As shown in FIG. 3, a reel 10 around which a wire W is wound is detachably housed in the rear upper part of the main body 4. As shown in FIG. 2, the housing 3 includes a reel cover 5 shaped to cover the reel 10 above. The reel cover 5 is rotatably held by cover holding portions 7 provided at the rear left and rear right portions of the main body portion 4. The reel cover 5 opens and closes by rotating relative to the main body 4.

As shown in FIGS. 3 to 5, the reinforcing bar binding machine 2 includes a feed mechanism 12, a guide mechanism 14, a brake mechanism 16, a cutting mechanism 18, and a twisting mechanism 20.

As shown in FIG. 3, the feeding mechanism 12 feeds the wire W supplied from the reel 10 to the guide mechanism 14 in front of the main body 4. The feed mechanism 12 includes a feed motor 22, a driving roller 24, and a driven roller 26. A wire W is held between the driving roller 24 and the driven roller 26. The feed motor 22 is a DC brushed motor. The feed motor 22 rotates the main drive roller 24 . When the feed motor 22 rotates the driving roller 24, the driven roller 26 rotates in the opposite direction, and the wire W held between the driving roller 24 and the driven roller 26 is sent out to the guide mechanism 14, and the wire W is removed from the reel 10. is brought out.

As shown in FIG. 4, the guide mechanism 14 guides the wire W sent from the feed mechanism 12 around the reinforcing bar R in an annular shape. The guide mechanism 14 includes a guide pipe 28, an upper curl guide 30, and a lower curl guide 32. The rear end of the guide pipe 28 opens toward the space between the driving roller 24 and the driven roller 26. The wire W sent from the sending mechanism 12 is fed into the guide pipe 28. The front end of the guide pipe 28 opens toward the inside of the upper curl guide 30. The upper curl guide 30 includes a first guide passage 34 for guiding the wire W sent from the guide pipe 28 and a second guide passage (not shown) for guiding the wire W sent from the lower curl guide 32. ) is provided.

As shown in FIG. 4, the first guide path 34 includes a plurality of guide pins 38 that guide the wire W so as to curl the wire W downward, and a cutter that constitutes a part of the cutting mechanism 18, which will be described later. 40 are provided. The wire W sent from the guide pipe 28 is guided by the guide pin 38 in the first guide path 34, passes through the cutter 40, and is sent out from the front end of the upper curl guide 30 toward the lower curl guide 32.

As shown in FIG. 5, the lower curl guide 32 is provided with a return plate 42. As shown in FIG. The return plate 42 guides the wire W sent from the front end of the upper curl guide 30 and sends it back toward the rear end of the second guide path of the upper curl guide 30.

The second guide passage of the upper curl guide 30 is arranged adjacent to the first guide passage 34. The second guide path guides the wire W sent from the lower curl guide 32 and sends it out from the front end of the upper curl guide 30 toward the lower curl guide 32.

The wire W fed from the feeding mechanism 12 is wound around the reinforcing bar R in an annular shape by the upper curl guide 30 and the lower curl guide 32. The number of turns of the wire W around the reinforcing bar R can be set in advance by the user. When the feeding mechanism 12 feeds out the wire W by a feeding amount corresponding to the set number of windings, the feeding mechanism 12 stops the feeding motor 22 and stops feeding the wire W.

The brake mechanism 16 shown in FIG. 3 stops the rotation of the reel 10 in conjunction with the feeding mechanism 12 stopping feeding out the wire W. The brake mechanism 16 includes a solenoid 46, a link 48, and a brake arm 50. Engagement portions 10a with which the brake arm 50 engages are formed on the reel 10 at predetermined angular intervals in the radial direction. When the solenoid 46 is not energized, the brake arm 50 is separated from the engaging portion 10a of the reel 10. When the solenoid 46 is energized, the brake arm 50 is driven via the link 48 and engages with the engaging portion 10a of the reel 10. The brake mechanism 16 separates the brake arm 50 from the engaging portion 10a of the reel 10 without energizing the solenoid 46 when the feeding mechanism 12 feeds out the wire W. Thereby, the reel 10 can freely rotate, and the feeding mechanism 12 can pull out the wire W from the reel 10. Further, when the feeding mechanism 12 stops feeding out the wire W, the brake mechanism 16 energizes the solenoid 46 to engage the brake arm 50 with the engaging portion 10a of the reel 10. As a result, rotation of the reel 10 is prohibited. Thereby, even after the feeding mechanism 12 stops feeding the wire W, the reel 10 continues to rotate due to inertia, and it is possible to prevent the wire W from loosening between the reel 10 and the feeding mechanism 12.

The cutting mechanism 18 shown in FIGS. 4 and 5 cuts the wire W in a state where the wire W is wound around the reinforcing bar R. The cutting mechanism 18 includes a cutter 40 and a link 52. The link 52 rotates the cutter 40 in conjunction with a torsion mechanism 20, which will be described later. As the cutter 40 rotates, the wire W passing through the cutter 40 is cut.

The twisting mechanism 20 shown in FIG. 5 binds the reinforcing bars R with the wires W by twisting the wires W wound around the reinforcing bars R. The torsion mechanism 20 includes a torsion motor 54, a speed reduction mechanism 56, a screw shaft 58 (see FIG. 4), a sleeve 60, a push plate 61, and a pair of hooks 62.

The torsion motor 54 is a DC brushless motor. The rotation of the torsion motor 54 is transmitted to the screw shaft 58 via the reduction mechanism 56. The torsion motor 54 is rotatable in forward and reverse directions, and accordingly, the screw shaft 58 is also rotatable in forward and reverse directions. The sleeve 60 is arranged to surround the screw shaft 58. When the rotation of the sleeve 60 is prohibited, when the screw shaft 58 rotates in the forward direction, the sleeve 60 moves forward, and when the screw shaft 58 rotates in the opposite direction, the sleeve 60 moves backward. do. The push plate 61 moves in the front-back direction integrally with the sleeve 60 in accordance with the movement of the sleeve 60 in the front-back direction. Further, when the screw shaft 58 rotates while the sleeve 60 is allowed to rotate, the sleeve 60 rotates together with the screw shaft 58.

When the sleeve 60 advances from the initial position to the predetermined position, the push plate 61 drives the link 52 of the cutting mechanism 18 to rotate the cutter 40. A pair of hooks 62 are provided at the front end of the sleeve 60 and are opened and closed depending on the position of the sleeve 60 in the front and back direction. When the sleeve 60 moves forward, the pair of hooks 62 close and grip the wire W. Thereafter, when the sleeve 60 moves rearward, the pair of hooks 62 open and release the wire W.

The torsion mechanism 20 rotates the torsion motor 54 with the wire W wound around the reinforcing bar R. At this time, rotation of the sleeve 60 is prohibited, and the rotation of the screw shaft 58 moves the sleeve 60 forward, and the push plate 61 and the pair of hooks 62 move forward, and the pair of hooks 62 close to grip the wire W. When the sleeve 60 is allowed to rotate, the sleeve 60 rotates due to the rotation of the screw shaft 58, and the pair of hooks 62 also rotate. As a result, the wire W is twisted and the reinforcing bars R are bundled.

When the twisting of the wire W is completed, the twisting mechanism 20 rotates the twisting motor 54 in the opposite direction. At this time, rotation of the sleeve 60 is prohibited, and after the pair of hooks 62 are opened and the wire W is released, the sleeve 60 is retreated by the rotation of the screw shaft 58, and the push plate 61 and the pair of hooks 62 are also retreated. do. As the sleeve 60 retreats, the push plate 61 drives the link 52 of the cutting mechanism 18 to return the cutter 40 to its initial position. Thereafter, when the sleeve 60 retreats to the initial position, rotation of the sleeve 60 is allowed, and the rotation of the screw shaft 58 causes the sleeve 60 and the pair of hooks 62 to rotate, returning to the initial angle.

As shown in FIG. 2, a first operating section 64 is provided at the top of the main body section 4. The first operation unit 64 is provided with a main switch 74 for switching the main power on/off, a main power LED 76 for displaying the on/off status of the main power, and the like.

A second operating section 90 is provided on the front upper surface of the battery mounting section 8 . The user can set the number of turns of the wire W around the reinforcing bar R, the torque threshold value for twisting the wire W, etc. via the second operation unit 90. The second operation unit 90 is provided with a setting switch 98 for setting the number of turns of the wire W around the reinforcing bar R and a torque threshold when twisting the wire W, a display LED 96 for displaying the current settings, and the like. ing.

As shown in FIGS. 2 to 5, when the extension handle 100 is not attached to the reinforcing bar tying machine 2, the user uses the reinforcing bar tying machine 2 while holding the grip part 6. A trigger 84 that can be pulled by the user is provided at the upper front portion of the grip portion 6 . As shown in FIG. 5, a trigger switch 86 that detects whether the trigger 84 is turned on or off is provided inside the grip 6. When the user pulls the trigger 84 and turns on the trigger switch 86, the reinforcing bar binding machine 2 uses the feeding mechanism 12, the guiding mechanism 14, and the brake mechanism 16 to wind the wire W around the reinforcing bar R. The cutting mechanism 18 and the twisting mechanism 20 execute a series of operations of cutting the wire W and twisting the wire W wound around the reinforcing bar R.

(Configuration of extension handle 100)
As shown in FIG. 1, the extension handle 100 includes a tool holder 102, an extension pipe 104, a linkage 106, a handle housing 108, a bracket 110, a support pipe 112, and a cuff member 114. There is.

The tool holder 102 is fixed near the front end of the extension pipe 104. The tool holder 102 is detachably attached to the grip part 6 of the reinforcing bar binding machine 2 and holds the reinforcing bar binding machine 2. As shown in FIG. 21, the tool holder 102 includes a right holder 170, a left holder 172, a hinge 174, and a tightening lever 176. The right side holder 170 includes a clamping part 170a having a shape corresponding to the right surface, the right half of the front surface, and the right half of the rear surface of the gripping part 6 of the reinforcing bar binding machine 2, and a lock part extending rearward from the rear end of the clamping part 170a. 170b, and a fixing part 170c connected to the upper end of the holding part 170a and fixed to the extension pipe 104. The left side holder 172 includes a clamping part 172a having a shape corresponding to the left surface, the left half of the front surface, and the left half of the rear surface of the gripping part 6 of the reinforcing bar binding machine 2, and a lock part extending rearward from the rear end of the clamping part 172a. 172b. A notch 172c is formed in the lock portion 172b. The front end of the clamping part 170a of the right holder 170 and the front end of the clamping part 172a of the left holder 172 are rotatably connected via a hinge 174. The lock portion 170b of the right holder 170 is provided with a male screw 170d that passes through a notch 172c of the lock portion 172b of the left holder 172 and extends leftward. The tightening lever 176 is screwed onto the male screw 170d with the locking portion 172b of the left holder 172 being sandwiched between the locking portion 170b of the right holder 170. When attaching the reinforcing bar binding machine 2 to the tool holder 102, the tightening lever 176 is removed and the left holder 172 is rotated relative to the right holder 170 to open it. In this state, align the gripping part 6 of the reinforcing bar binding machine 2 with the clamping part 170a of the right holder 170, rotate the left holder 172 with respect to the right holder 170 to close it, and attach the tightening lever 176. . Thereafter, by tightening the tightening lever 176 and narrowing the distance between the locking part 170b of the right holder 170 and the locking part 172b of the left holder 172, the clamping part 170a of the right holder 170 and the clamping part 172a of the left holder 172 are bound together with the reinforcing steel. The reinforcing bar binding machine 2 is fixed to the tool holder 102 by being pressed against the gripping part 6 of the machine 2.

In the tool holder 102, an opening 170e for reducing rigidity is formed in the clamping part 170a of the right holder 170, and an opening 172d for reducing rigidity is formed in the clamping part 172a of the left holder 172. has been done. As a result, even if the tightening lever 176 is strongly tightened to the male screw 170d and the distance between the locking part 170b of the right holder 170 and the locking part 172b of the left holder 172 becomes narrower, the gripping part 6 of the reinforcing bar binding machine 2 will hold the clamping part 6. Excessive pressure from the portions 170a and 172a can be suppressed.

The extension pipe 104 has a cylindrical shape and extends in the front-rear direction. The position of the tool holder 102 relative to the extension pipe 104 is fixed. Note that the fixed position of the tool holder 102 with respect to the extension pipe 104 may be adjustable in the front-back direction. In the following description, the tool holder 102 and the extension pipe 104 are also collectively referred to as the extension part 103.

The link mechanism 106 includes a front link 120 (see FIG. 6) located near the front end of the extension pipe 104, a rear link 122 (see FIG. 7) located near the rear end of the extension pipe 104, and a rear link 122 (see FIG. 7) located near the front end of the extension pipe 104. A shaft 124 (see FIGS. 6 and 7) that extends in the front-rear direction, has a front link 120 fixed to its front end, and a rear link 122 fixed to its rear end, and is housed inside the extension pipe 104. The front link 120 is provided with a compression spring 126 (FIG. 6) that biases the front link 120 forward with respect to the extension pipe 104.

As shown in FIG. 6, the front link 120 includes a slider 128 and a bolt 130. The slider 128 is housed inside the extension pipe 104 so as to be slidable in the front-rear direction. The slider 128 is formed with a through hole 128a extending in the front-rear direction and a screw hole 128b communicating with the through hole 128a from the outer surface of the slider 128. The shaft 124 passes through a through hole 128a of the slider 128. A long hole 104a extending in the front-rear direction is formed on the left side near the front end of the extension pipe 104. The bolt 130 is screwed into the threaded hole 128b of the slider 128 from the outside of the extension pipe 104 via the elongated hole 104a. When the bolt 130 is loosened relative to the slider 128, the slider 128 is slidable in the front and rear directions relative to the shaft 124, and the position of the slider 128 relative to the shaft 124 can be adjusted. When the bolt 130 is tightened against the slider 128, the tip of the bolt 130 presses the shaft 124, thereby fixing the position of the slider 128 with respect to the shaft 124. As shown in FIG. 1, when the extension handle 100 is attached to the reinforcing bar tying machine 2, the bolt 130 is arranged along the left-right direction ahead of the trigger 84 of the reinforcing bar tying machine 2.

As shown in FIG. 7, the rear link 122 includes a slider 132, a bolt 134, and a sleeve 136. The slider 132 is housed inside the extension pipe 104 so as to be slidable in the front-rear direction. The slider 132 is formed with a through hole 132a extending in the front-rear direction and a screw hole 132b communicating with the through hole 132a from the outer surface of the slider 132. The shaft 124 passes through a through hole 132a of the slider 132. A long hole 104b extending in the front-rear direction is formed in the lower surface of the extension pipe 104. The sleeve 136 is attached to the bolt 134 so as to cover the outer peripheral surface of the head 134a and shaft portion 134b of the bolt 134. The bolt 134 is screwed into the threaded hole 132b of the slider 132 from the outside of the extension pipe 104 via the elongated hole 104b. When the bolt 134 is loosened relative to the slider 132, the slider 132 is slidable in the front and rear directions relative to the shaft 124, and the position of the slider 132 relative to the shaft 124 can be adjusted. When the bolt 134 is tightened against the slider 132, the tip of the bolt 134 presses the shaft 124, thereby fixing the position of the slider 132 with respect to the shaft 124.

In the extension handle 100 shown in FIG. 1, when the user pulls the sleeve 136 backward, the rear link 122, shaft 124, and front link 120 integrally move rearward, and the trigger of the reinforcing bar binding machine 2 is activated. 84 is pulled. When the user releases the sleeve 136, the front link 120, shaft 124, and rear link 122 integrally move forward due to the biasing force of the compression spring 126, and the trigger 84 of the reinforcing bar binding machine 2 is pulled. It will be canceled.

As shown in FIG. 7, the handle housing 108 includes a fixing member 140 fixed near the rear end of the extension pipe 104, and a gripping member extending downward from the lower surface of the fixing member 140 behind the sleeve 136 of the link mechanism 106. 142, and a support member 144 extending downward from the lower surface of the fixing member 140 in front of the sleeve 136 of the link mechanism 106. The fixing member 140, the gripping member 142, and the supporting member 144 are integrally formed. The fixing position of the fixing member 140 with respect to the extension pipe 104 can be adjusted in the front-rear direction.

As shown in FIG. 1, a wrench attachment groove 144c is formed on the left side of the support member 144 of the handle housing 108. A hexagonal wrench 145 is removably attached to the wrench attachment groove 144c. The hexagonal wrench 145 is attached to the wrench attachment groove 144c so that the short side 145a is arranged along the front-back direction and the long side 145b is arranged along the up-down direction. The user can use the hex wrench 145 to loosen or tighten the bolts 130 and 134. Note that the extension handle 100 does not need to include the hexagonal wrench 145 or the wrench attachment groove 144c.

As shown in FIG. 8, the bracket 110 is attached to a support pipe 112. The bracket 110 includes a lower wall 146 that covers the lower side of the support pipe 112, a right wall 148 that covers the right side of the support pipe 112, and a left wall 150 that covers the left side of the support pipe 112. Note that, hereinafter, the lower wall 146, right wall 148, and left wall 150 of the bracket 110 are also collectively referred to as the sheath portion 151. Bracket 110 further includes a right side protrusion 152 and a left side protrusion 154 located near the front end of bracket 110. The right side protrusion 152 extends upward from the right wall 148, and the left side protrusion 154 extends upward from the left wall 150. Bracket 110 further includes a top wall 156 and a hinge portion 158 located near the rear end of bracket 110. The upper wall 156 connects the right wall 148 and the left wall 150 and covers the support pipe 112 from above. The hinge portion 158 extends upward from the top wall 156.

As shown in FIG. 7, the hinge portion 158 of the bracket 110 is held by the grip member 142 of the handle housing 108 via a hinge pin 159 extending in the left-right direction. Therefore, the bracket 110 is rotatable with respect to the handle housing 108 about the central axis of the hinge pin 159 as the rotation axis RX.

As shown in FIG. 9, the right side protrusion 152 and the left side protrusion 154 of the bracket 110 are fixed to the support member 144 of the handle housing 108 by a fastening member 160. The fastening member 160 includes a bolt 162, a washer 164, and a grip nut 166. A groove 144a in which the bracket 110 can slide is formed in the lower part of the support member 144. Furthermore, a long hole 144b communicating with the groove 144a is formed on the right side of the support member 144. As shown in FIG. 10, the elongated hole 144b extends along an arc centered on the rotation axis RX of the hinge portion 158. As shown in FIG. 9, the head 162a of the bolt 162 is held by the left protrusion 154 of the bracket 110. The shaft portion 162b of the bolt 162 passes through the left protrusion 154 and the right protrusion 152, and further passes through the elongated hole 144b, and protrudes to the outside of the support member 144. The grip nut 166 is screwed onto the bolt 162 from the outside of the support member 144 via the washer 164. In the following description, the bracket 110 and the fastening member 160 are also collectively referred to as the connecting portion 111.

When the grip nut 166 is tightened to the bolt 162, the distance between the head 162a of the bolt 162 and the grip nut 166 narrows, and the head 162a of the bolt 162 and the grip nut 166 separate the right protrusion 152 and the left protrusion 154. , the support member 144 is held. As a result, the distance between the right protrusion 152 and the left protrusion 154 is narrowed, and the sheath part 151 of the bracket 110 presses the outer peripheral surface of the support pipe 112, thereby fixing the bracket 110 to the support pipe 112. In addition, the bracket 110 is fixed to the support member 144 by the right protrusion 152 pressing the support member 144.

As shown in FIG. 10, the support pipe 112 has a cylindrical shape and extends linearly. Cuff member 114 is fixed to the rear end of support pipe 112. As shown in FIG. 1, the cuff member 114 has a band shape curved in a U-shape. In the following description, the support pipe 112 and the cuff member 114 are also collectively referred to as the arm support section 113.

When using the reinforcing bar binding machine 2 with the extension handle 100 attached, the user holds the gripping member 142 of the handle housing 108 and inserts the reinforcing bar R between the upper curl guide 30 and the lower curl guide 32. Set the reinforcing bar tying machine 2 as shown below, and pull the sleeve 136. As a result, the reinforcing bars R are bound together by the wires W. For example, even if the reinforcing bar R is located below the user, the user can perform the tying work without bending down. Further, when using the reinforcing bar binding machine 2 with the extension handle 100 attached, the user's forearm comes into contact with the cuff member 114, so that the user can work stably. In particular, when the reinforcing bars R are located below the user and the reinforcing bar tying machine 2 is used facing downward, it becomes necessary to swing up the extension handle 100 every time the tying work is completed. Even in such a case, since the cuff member 114 is in contact with the user's forearm, the extension handle 100 can be easily swung up.

In the extension handle 100, by loosening the grip nut 166 with respect to the bolt 162, the attachment position of the support pipe 112 to the gripping member 142 and the attachment angle of the support pipe 112 to the gripping member 142 can be adjusted. . For example, by moving the support pipe 112 relative to the bracket 110 along the longitudinal direction of the support pipe 112 from the state shown in FIG. 10, as shown in FIG. It can be done. Alternatively, by rotating the support pipe 112 relative to the handle housing 108 from the state shown in FIG. 10, the cuff member 114 is moved upward relative to the grip member 142 as shown in FIG. be able to. Furthermore, by moving the support pipe 112 relative to the bracket 110 along the longitudinal direction of the support pipe 112 from the state shown in FIG. 12, the cuff member 114 is moved to a position closer to the gripping member 142, as shown in FIG. It can be done. After adjusting the attachment position of the support pipe 112 to the gripping member 142 and the attachment angle of the support pipe 112 to the gripping member 142, the grip nut 166 is tightened to the bolt 162, so that the support pipe 112 is attached to the handle housing 108. Can be fixed.

Note that, as shown in FIGS. 22 and 23, in the extension handle 100, the front link 120 may be provided with a rectangular cylindrical cover 131 that covers the outside of the bolt 130. In this case, since the cover 131 contacts the trigger 84 instead of the bolt 130, the trigger 84 can be pulled by the front link 120 more stably.

As shown in FIGS. 22 and 23, in the extension handle 100, a tool holder 180 may be used instead of the tool holder 102 to hold the reinforcing bar binding machine 2. As shown in FIG. 23, the tool holder 180 includes a right holder 182, a left holder 184, a hinge 186, and a tightening lever 188. The right side holder 182 includes a clamping part 182a having a shape corresponding to the right surface and rear surface of the gripping part 6 of the reinforcing bar binding machine 2, a locking part 182b extending rearward from the left rear end of the clamping part 182a, and an upper end of the clamping part 182a. It is connected to the extension pipe 104 and includes a fixed part 182c fixed to the extension pipe 104. The left side holder 184 includes a clamping part 184a having a shape corresponding to the left side and front surface of the gripping part 6 of the reinforcing bar binding machine 2, and a locking part 184b extending rearward from the left rear end of the clamping part 184a. A notch 184c is formed in the lock portion 184b. The front right end of the right holder 182 and the front right end of the left holder 184 are rotatably connected via a hinge 186. The lock portion 182b of the right holder 182 is provided with a male screw 182d that passes through a notch 184c of the lock portion 184b of the left holder 184 and extends leftward. The tightening lever 188 is screwed into the male screw 182d with the locking portion 184b of the left holder 184 being sandwiched between the locking portion 182b of the right holder 182. When attaching the reinforcing bar binding machine 2 to the tool holder 180, the tightening lever 188 is removed and the left holder 184 is rotated relative to the right holder 182 to open it. In this state, align the gripping part 6 of the reinforcing bar binding machine 2 with the clamping part 182a of the right holder 182, rotate the left holder 184 with respect to the right holder 182 to close it, and attach the tightening lever 188. . Thereafter, by tightening the tightening lever 188 and narrowing the distance between the locking part 182b of the right holder 182 and the locking part 184b of the left holder 184, the clamping part 182a of the right holder 182 and the clamping part 184a of the left holder 184 are tied together with the reinforcing steel. The reinforcing bar binding machine 2 is fixed to the tool holder 180 by being pressed against the gripping part 6 of the machine 2.

In the tool holder 180, an opening 182e for reducing rigidity is formed in the clamping part 182a of the right holder 182, and an opening 184d for reducing rigidity is formed in the clamping part 184a of the left holder 184. has been done. As a result, even if the tightening lever 188 is strongly tightened to the male screw 182d and the distance between the locking part 182b of the right holder 182 and the locking part 184b of the left holder 184 becomes narrower, the gripping part 6 of the reinforcing bar binding machine 2 will hold the clamping part 6. Excessive pressure from the portions 182a and 184a can be suppressed. In the tool holder 180, a hinge 186 connects the front right end of the right holder 182 and the front right end of the left holder 184, and the rear surface of the gripping part 6 of the reinforcing bar binding machine 2 is in contact with the gripping part 182a of the right holder 182. The front surface of the gripping part 6 of the reinforcing bar binding machine 2 contacts the gripping part 184a of the left holder 184. With such a configuration, it is possible to suppress the generation of a gap between the gripping part 6 of the reinforcing bar binding machine 2 and the clamping parts 182a, 184a in the front-back direction, and the reinforcing bar binding machine 2 can be It is possible to suppress wobbling in the front-rear direction. Furthermore, in the tool holder 180, a claw 184e that protrudes toward the front surface of the grip part 6 is formed on the grip part 184a of the left holder 184. With such a configuration, it is possible to further suppress the generation of a gap between the gripping part 6 of the reinforcing bar binding machine 2 and the clamping parts 182a, 184a in the front-back direction, and the reinforcing bar binding machine 2 can be attached to the tool holder. It is possible to further suppress wobbling in the front-rear direction with respect to 180.

As shown in FIG. 22, in the extension handle 100, the handle housing 108 may include a connecting member 143 that connects the lower end of the grip member 142 and the lower end of the support member 144. The connecting member 143 is integrally formed with the gripping member 142 and the supporting member 144. The connecting member 143 has a shape that covers the upper surface of the support pipe 112 and the right and left surfaces of the bracket 110.

As shown in FIG. 22, an auxiliary grip 190 may be detachably attached to the extension handle 100. The auxiliary grip 190 is attached to the handle housing 108 by screwing into the auxiliary grip attachment part 108a provided on the upper surface of the fixing member 140. When attached to handle housing 108 , auxiliary grip 190 extends upwardly from the top surface of fixing member 140 above gripping member 142 . The user grips the gripping member 142 with one hand (for example, the right hand) and grips the auxiliary grip 190 with the other hand (for example, the left hand), thereby using the hand that is gripping the gripping member 142 (for example, the right hand). ) can reduce the burden. Further, as shown in FIG. 22, even when the cuff member 114 is positioned close to the gripping member 142 so that the cuff member 114 does not touch the user's forearm, the gripping member 142 can be gripped with one hand. By grasping the auxiliary grip 190 with the other hand, the extension handle 100 can be easily swung up.

As shown in FIG. 24, the auxiliary grip 190 is disposed on the opposite side of the gripping member 142 from the extension pipe 104 when the extension handle 100 is viewed from the side. Further, as shown in FIG. 25, the auxiliary grip 190 is arranged on the opposite side of the grip member 142 when viewed from the extension pipe 104 when the extension handle 100 is viewed from the rear, that is, from the longitudinal direction of the extension pipe 104. . With this configuration, when gripping member 142 is gripped with one hand and auxiliary grip 190 is gripped with the other hand, extension handle 100 can be held stably.

Note that the auxiliary grip 190 may be attached to the extension handle 100 in a different form from that shown in FIG. 22. For example, as shown in FIG. 26, the auxiliary grip 190 is attached to the handle housing 108 so as to extend upward from the top surface of the fixed member 140 above the support member 144 when attached to the handle housing 108. Good too. Alternatively, as shown in FIG. 27, when the auxiliary grip 190 is attached to the handle housing 108, the auxiliary grip 190 is arranged above the gripping member 142 from the side (for example, the left side) of the fixing member 140 toward the side (for example, to the left). It may be extendably attached to handle housing 108 . Alternatively, as shown in FIG. 28, when the auxiliary grip 190 is attached to the handle housing 108, the auxiliary grip 190 extends from the side (for example, the left side) of the fixing member 140 toward the side (for example, the left side) above the support member 144. It may be extendably attached to handle housing 108 . Alternatively, as shown in FIG. 29, the auxiliary grip 190 may be attached to the bracket 110. In the example shown in FIG. 29, the auxiliary grip 190 is attached to the bracket 110 so as to extend downward from the lower surface of the bracket 110.

As shown in FIG. 24, a wrench attachment groove 144d may be formed in the handle housing 108 instead of the wrench attachment groove 144c. The wrench attachment groove 144d is formed on the right side of the support member 144 of the handle housing 108, and has a through hole (not shown) communicating with the inside of the handle housing 108 at the upper end. In the example shown in FIG. 24, the hexagonal wrench 145 is arranged in the wrench mounting groove 144d such that the short side 145a is inserted into the through hole of the wrench mounting groove 144d, and the long side 145b is arranged along the longitudinal direction of the support member 144. is removably attached to.

As described above, in this embodiment, the extension handle 100 is used by being attached to the reinforcing bar binding machine 2 (an example of a power tool). The extension handle 100 includes an extension part 103 that holds the reinforcing bar tying machine 2, a handle housing 108 (an example of a relay part) that includes a grip member 142 that is connected to the extension part 103 and is gripped by a user, and the grip member 142. It is rotatably connected to a sleeve 136 (an example of an operation section) that accepts an operation from the user to operate the reinforcing bar binding machine 2, and a handle housing 108, so that it can be attached to the user's arm. An arm support part 113 is provided with a cuff member 114 in contact with the arm support part 113.

According to the extension handle 100 described above, by rotating the arm support part 113 with respect to the handle housing 108, the relative positional relationship of the cuff member 114 with respect to the gripping member 142 can be changed. The gripping member is designed so that the cuff member 114 appropriately contacts the user's arm when the user grips the gripping member 142 and performs the work, regardless of the user's physique or posture during work. The relative position of cuff member 114 to 142 can be adjusted.

In this embodiment, the arm support part 113 is movably connected to the handle housing 108 along the longitudinal direction of the arm support part 113.

In this embodiment, the extension handle 100 is used by being attached to a reinforcing bar binding machine 2 (an example of a power tool). The extension handle 100 includes an extension part 103 that holds the reinforcing bar tying machine 2, a handle housing 108 (an example of a relay part) that includes a grip member 142 that is connected to the extension part 103 and is gripped by a user, and the grip member 142. The arm support section 113 includes a sleeve 136 (an example of an operation section) that is provided near the reinforcing bar binding machine 2 and receives an operation from the user to operate the reinforcing bar binding machine 2, and a cuff member 114 that comes into contact with the user's arm. ing. The arm support part 113 is movably connected to the handle housing 108 along the longitudinal direction of the arm support part 113.

According to the extension handle 100 described above, the relative positional relationship of the cuff member 114 with respect to the gripping member 142 is changed by moving the arm support part 113 with respect to the handle housing 108 along the longitudinal direction of the arm support part 113. can do. The gripping member is designed so that the cuff member 114 appropriately contacts the user's arm when the user grips the gripping member 142 and performs the work, regardless of the user's physique or posture during work. The relative position of cuff member 114 to 142 can be adjusted.

In this embodiment, the arm support section 113 further includes a support pipe 112 (an example of a support beam) to which a cuff member 114 is fixed. The support pipe 112 is movably connected to the handle housing 108 along the longitudinal direction of the support pipe 112.

If the cuff member 114 is configured to be movable with respect to the support pipe 112, when the cuff member 114 is moved in the direction approaching the grip member 142, the support pipe 112 will move beyond the cuff member 114 and touch the user's body. There is a risk that it will protrude to the near side and interfere with the user's work. As described above, if the cuff member 114 is fixed to the support pipe 112 and the support pipe 112 is movable relative to the handle housing 108, the cuff member 114 is moved in the direction approaching the grip member 142. Since the support pipe 112 protrudes beyond the handle housing 108 and away from the user's body, it does not interfere with the user's work. User convenience can be improved.

In this embodiment, the extension handle 100 further includes a connection part 111 that connects the support pipe 112 and the handle housing 108. The connecting portion 111 includes a sheath portion 151 having a shape that partially covers the outer circumferential surface of the support pipe 112, and a right side protrusion 152 (an example of a first protrusion) extending from one circumferential end of the sheath portion 151. , the bracket 110 (an example of a connecting member) includes a left side protrusion 154 (an example of a second protrusion) extending from the other end in the circumferential direction of the sheath part 151, and an interval between the right side protrusion 152 and the left side protrusion 154. A fastening member 160 (an example of an adjusting member) to be adjusted is provided. When the distance between the right side protrusion 152 and the left side protrusion 154 is widened by the fastening member 160, the support pipe 112 is allowed to move relative to the handle housing 108 in the longitudinal direction of the support pipe 112. When the distance between the right side protrusion 152 and the left side protrusion 154 is narrowed by the fastening member 160, movement of the support pipe 112 relative to the handle housing 108 in the longitudinal direction of the support pipe 112 is prohibited.

According to the above configuration, by adjusting the distance between the right side protrusion 152 and the left side protrusion 154, the magnitude of the frictional force acting between the sheath part 151 and the support pipe 112 can be changed. With a simple configuration, the support pipe 112 can be switched between a movable state and an immovable state with respect to the handle housing 108.

In this embodiment, the gripping member 142 rotatably supports the bracket 110. The handle housing 108 further includes a support member 144 whose position relative to the gripping member 142 is fixed. The fastening member 160 includes a head 162a of a bolt 162 (an example of a first adjustment member) and a grip nut 166 (an example of a second adjustment member), which sandwich the support member 144, the right side protrusion 152, and the left side protrusion 154. It is equipped with When the distance between the head 162a of the bolt 162 and the grip nut 166 is widened, movement of the support pipe 112 with respect to the handle housing 108 along the longitudinal direction of the support pipe 112 is allowed, and rotation of the support pipe 112 with respect to the handle housing 108 is allowed. movement is allowed. When the distance between the head 162a of the bolt 162 and the grip nut 166 is narrowed, movement of the support pipe 112 in the longitudinal direction with respect to the handle housing 108 is prohibited, and rotation of the support pipe 112 with respect to the handle housing 108 is prohibited. movement is prohibited.

According to the above configuration, by adjusting the distance between the head 162a of the bolt 162 and the grip nut 166, a state is created in which both rotation of the support pipe 112 and movement along the longitudinal direction of the support pipe 112 are permitted. , it is possible to switch between a state in which both rotation of the support pipe 112 and movement along the longitudinal direction of the support pipe 112 are prohibited. Further, according to the above configuration, the bracket 110 is rotatable with respect to the gripping member 142, and the friction force for fixing the bracket 110 is applied from the support member 144, so that the position of the rotation axis and the friction The position where the force acts can be placed at a distance. This prevents the support pipe 112 from rotating relative to the handle housing 108 even if a large moment acts on the support pipe 112 while the support pipe 112 is fixed relative to the handle housing 108. can.

In this embodiment, the support member 144 is arranged between the gripping member 142 and the reinforcing bar binding machine 2.

According to the above configuration, the user's hand holding the grip member 142 can be protected by the support member 144 when the user performs work.

In this embodiment, the electric tool to which the extension handle 100 is attached is the reinforcing bar binding machine 2.

When the extension handle 100 is attached to the reinforcing bar binding machine 2 and used in a downward direction, it is necessary to swing up the extension handle 100 every time a binding operation is performed. According to the extension handle 100 described above, the relative positional relationship of the cuff member 114 to the gripping member 142 can be adjusted so that the cuff member 114 appropriately contacts the user's arm, so that the extension handle 100 can be swung up. can be easily done.

In this embodiment, the extension handle 100 is removably attached to the handle housing 108 and further includes an auxiliary grip 190 that is held by a user's hand other than the hand that grips the gripping member 142.

According to the above configuration, the user can grip the gripping member 142 with one hand and the auxiliary grip 190 with the other hand, thereby reducing the burden on the hand gripping the gripping member 142. be able to. Furthermore, even when using the extension handle 100 without the cuff member 114 touching the user's arm, the user can grasp the grip member 142 with one hand and the auxiliary grip 190 with the other hand. Therefore, the extension handle 100 can be held stably.

In this embodiment, when the extension handle 100 is viewed from the longitudinal direction (that is, the front-back direction) of the extension part 103, the auxiliary grip 190 is disposed on the opposite side of the gripping member 142 when viewed from the extension part 103.

According to the above configuration, when the user grips the grip member 142 with one hand and grips the auxiliary grip 190 with the other hand, the extension handle 100 can be stably held.

In this embodiment, the extension handle 100 is used by being attached to a reinforcing bar binding machine 2 (an example of a power tool). The extension handle 100 includes an extension part 103 that holds the reinforcing bar tying machine 2, a handle housing 108 (an example of a relay part) that includes a grip member 142 that is connected to the extension part 103 and is gripped by a user, and the grip member 142. A sleeve 136 (an example of an operating section) is provided near the handle housing 108 to accept an operation from the user to operate the reinforcing bar binding machine 2, and a sleeve 136 (an example of an operating section) is provided near the handle housing 108, and is attached to the user's grip member 142. It further includes an auxiliary grip 190 that is held by a hand other than the hand that holds the.

According to the above configuration, the user can grip the gripping member 142 with one hand and the auxiliary grip 190 with the other hand, thereby reducing the burden on the hand gripping the gripping member 142. be able to.

(Example 2)
As shown in FIG. 14, the extension handle 200 of this embodiment is used by being attached to a reinforcing bar binding machine 2. The extension handle 200 of this embodiment has substantially the same configuration as the extension handle 100 of the first embodiment. Below, the differences between the extension handle 200 of the present embodiment and the extension handle 100 of the first embodiment will be explained.

(Configuration of extension handle 200)
The extension handle 200 includes a tool holder 102, an extension pipe 104, a link mechanism 106, a handle housing 202, a bracket 204, a support pipe 112, and a cuff member 114.

The handle housing 202 includes a fixing member 210 fixed near the rear end of the extension pipe 104, and a gripping member 212 extending downward from the lower surface of the fixing member 210 behind the sleeve 136 of the link mechanism 106. The fixing member 210 and the gripping member 212 are integrally formed. The fixing position of the fixing member 210 with respect to the extension pipe 104 can be adjusted in the front-rear direction.

As shown in FIG. 15, the bracket 204 is attached to the support pipe 112. The bracket 204 includes a substantially semicylindrical sheath portion 216 that covers the lower, right, and left sides of the support pipe 112, and a right protrusion portion 218 that extends upward from the right end of the sheath portion 216. A left protrusion 220 is provided that extends upward from the left end of the sheath portion 216.

As shown in FIG. 16, a mounting portion 212a is formed at the bottom of the gripping member 212. Rubber washers 222 and 224 are attached to the right and left surfaces of the attachment portion 212a. The right side protrusion 218 and the left side protrusion 220 of the bracket 204 are fixed to the attachment part 212a by a fastening member 226. The fastening member 226 includes a bolt 228 and a grip nut 230. A head 228a of the bolt 228 is held by the left protrusion 220. The shaft portion 228b of the bolt 228 passes through the left protrusion 220, the rubber washer 224, the mounting portion 212a, the rubber washer 222, and the right protrusion 218, and protrudes to the outside of the bracket 204. The grip nut 230 is threaded onto the bolt 228 from the outside of the bracket 204. When the grip nut 230 is loosened with respect to the bolt 228, the bracket 204 is rotatable with respect to the grip member 212 about the central axis of the bolt 228 as the rotation axis RX. Note that in the following description, the bracket 204 and the fastening member 226 are also collectively referred to as the connecting portion 205.

When the grip nut 230 is tightened to the bolt 228, the distance between the head 228a of the bolt 228 and the grip nut 230 narrows, and the head 228a of the bolt 228 and the grip nut 230 cause the right protrusion 218, the gripping member 212, The left protrusion 220 is clamped. As a result, the distance between the right side protrusion 218 and the left side protrusion 220 is narrowed, and the sheath part 216 of the bracket 204 presses the outer peripheral surface of the support pipe 112, thereby fixing the bracket 204 to the support pipe 112. In addition, the bracket 204 is fixed to the grip member 212 by the right side protrusion 218 and the left side protrusion 220 pressing the grip member 212 .

As shown in FIG. 14, when using the reinforcing bar binding machine 2 with the extension handle 200 attached, the user grasps the gripping member 212 of the handle housing 202 and holds the reinforcing bar R between the upper curl guide 30 and the lower The reinforcing bar binding machine 2 is set so as to fit between the curl guides 32, and the sleeve 136 is pulled. As a result, the reinforcing bars R are bound together by the wires W. For example, even if the reinforcing bar R is located below the user, the user can perform the tying work without bending down. Further, when using the reinforcing bar binding machine 2 with the extension handle 200 attached, the user's forearm comes into contact with the cuff member 114, so that the user can work stably. In particular, when the reinforcing bars R are located below the user and the reinforcing bar tying machine 2 is used facing downward, it is necessary to swing up the extension handle 200 every time the tying work is completed. Even in such a case, since the cuff member 114 is in contact with the user's forearm, the extension handle 200 can be easily swung up.

In the extension handle 200, by loosening the grip nut 230 with respect to the bolt 228, the attachment position of the support pipe 112 to the gripping member 212 and the attachment angle of the support pipe 112 to the gripping member 212 can be adjusted. . For example, by rotating the support pipe 112 relative to the handle housing 202 from the state shown in FIG. 17, the cuff member 114 is moved downward relative to the grip member 212, as shown in FIG. be able to. Alternatively, by moving the support pipe 112 relative to the bracket 204 along the longitudinal direction of the support pipe 112 from the state shown in FIG. 17, as shown in FIG. It can be done. Furthermore, by rotating the support pipe 112 relative to the handle housing 202 from the state shown in FIG. 19, the cuff member 114 is moved downward relative to the grip member 212, as shown in FIG. be able to. After adjusting the attachment position of the support pipe 112 to the grip member 212 and the attachment angle of the support pipe 112 to the grip member 212, tighten the grip nut 230 to the bolt 228 to secure the support pipe 112 to the handle housing 202. Can be fixed.

Note that in the extension handle 200 of this embodiment as well, the auxiliary grip 190 may be removably attached to the handle housing 202 or the bracket 204, similarly to the extension handle 100 of the first embodiment.

As described above, in this embodiment, the extension handle 200 is used by being attached to the reinforcing bar binding machine 2 (an example of a power tool). The extension handle 200 includes an extension part 103 that holds the reinforcing bar tying machine 2, a handle housing 202 (an example of a relay part) that includes a grip member 212 that is connected to the extension part 103 and is gripped by a user, and the grip member 212. It is rotatably connected to a sleeve 136 (an example of an operating section) that accepts an operation from the user to operate the reinforcing bar binding machine 2, and a handle housing 202, so that it can be attached to the user's arm. An arm support part 113 is provided with a cuff member 114 in contact with the arm support part 113.

According to the extension handle 200 described above, by rotating the arm support part 113 with respect to the handle housing 202, the relative positional relationship of the cuff member 114 with respect to the gripping member 212 can be changed. The gripping member is designed so that the cuff member 114 appropriately contacts the user's arm when the user grips the gripping member 212 and performs the work, regardless of the user's physique or posture during work. The relative position of cuff member 114 to 212 can be adjusted.

In this embodiment, the arm support part 113 is movably connected to the handle housing 202 along the longitudinal direction of the arm support part 113.

In this embodiment, the extension handle 200 is used by being attached to a reinforcing bar binding machine 2 (an example of a power tool). The extension handle 200 includes an extension part 103 that holds the reinforcing bar tying machine 2, a handle housing 202 (an example of a relay part) that includes a grip member 212 that is connected to the extension part 103 and is gripped by a user, and the grip member 212. The arm support section 113 includes a sleeve 136 (an example of an operation section) that is provided near the reinforcing bar binding machine 2 and receives an operation from the user to operate the reinforcing bar binding machine 2, and a cuff member 114 that comes into contact with the user's arm. ing. The arm support part 113 is movably connected to the handle housing 202 along the longitudinal direction of the arm support part 113.

According to the extension handle 200 described above, the relative positional relationship of the cuff member 114 with respect to the gripping member 212 is changed by moving the arm support part 113 with respect to the handle housing 202 along the longitudinal direction of the arm support part 113. can do. The gripping member is designed so that the cuff member 114 appropriately contacts the user's arm when the user grips the gripping member 212 and performs the work, regardless of the user's physique or posture during work. The relative position of cuff member 114 to 212 can be adjusted.

In this embodiment, the arm support section 113 further includes a support pipe 112 (an example of a support beam) to which a cuff member 114 is fixed. The support pipe 112 is movably connected to the handle housing 202 along the longitudinal direction of the support pipe 112.

If the cuff member 114 is configured to be movable with respect to the support pipe 112, when the cuff member 114 is moved in the direction approaching the grip member 212, the support pipe 112 will move beyond the cuff member 114 and touch the user's body. There is a risk that it will protrude to the near side and interfere with the user's work. As described above, if the cuff member 114 is fixed to the support pipe 112 and the support pipe 112 is movable relative to the handle housing 202, the cuff member 114 is moved in the direction approaching the grip member 212. Since the support pipe 112 protrudes beyond the handle housing 202 toward the side far from the user's body, it does not interfere with the user's work. User convenience can be improved.

In this embodiment, the extension handle 200 further includes a connection part 205 that connects the support pipe 112 and the handle housing 202. The connecting portion 205 includes a sheath portion 216 having a shape that partially covers the outer circumferential surface of the support pipe 112, and a right side protrusion 218 (an example of a first protrusion) extending from one circumferential end of the sheath portion 216. , the bracket 204 (an example of a connecting member) includes a left side protrusion 220 (an example of a second protrusion) extending from the other circumferential end of the sheath portion 216, and the interval between the right side protrusion 218 and the left side protrusion 220. A fastening member 226 (an example of an adjusting member) to be adjusted is provided. When the distance between the right side protrusion 218 and the left side protrusion 220 is widened by the fastening member 226, movement of the support pipe 112 in the longitudinal direction of the support pipe 112 relative to the handle housing 202 is allowed. When the distance between the right side protrusion 218 and the left side protrusion 220 is narrowed by the fastening member 226, movement of the support pipe 112 relative to the handle housing 202 in the longitudinal direction of the support pipe 112 is prohibited.

According to the above configuration, by adjusting the distance between the right side protrusion 218 and the left side protrusion 220, the magnitude of the frictional force acting between the sheath part 216 and the support pipe 112 can be changed. With a simple configuration, the support pipe 112 can be switched between a movable state and an immovable state with respect to the handle housing 202.

In this embodiment, the gripping member 212 rotatably supports the bracket 204. The fastening member 226 includes a head 228a of a bolt 228 (an example of a first adjustment member) and a grip nut 230 (an example of a second adjustment member) that sandwich the grip member 212, the right side protrusion 218, and the left side protrusion 220. It is equipped with When the distance between the head 228a of the bolt 228 and the grip nut 230 is widened, movement of the support pipe 112 with respect to the handle housing 202 along the longitudinal direction of the support pipe 112 is allowed, and rotation of the support pipe 112 with respect to the handle housing 202 is allowed. movement is allowed. When the distance between the head 228a of the bolt 228 and the grip nut 230 is narrowed, movement of the support pipe 112 in the longitudinal direction with respect to the handle housing 202 is prohibited, and rotation of the support pipe 112 with respect to the handle housing 202 is prohibited. movement is prohibited.

According to the above configuration, by adjusting the distance between the head 228a of the bolt 228 and the grip nut 230, a state is created in which both rotation of the support pipe 112 and movement along the longitudinal direction of the support pipe 112 are permitted. , it is possible to switch between a state in which both rotation of the support pipe 112 and movement along the longitudinal direction of the support pipe 112 are prohibited. Further, according to the above configuration, the configurations of the handle housing 202 and the bracket 204 can be simplified.

In this embodiment, the electric tool to which the extension handle 200 is attached is the reinforcing bar binding machine 2.

When the extension handle 200 is attached to the reinforcing bar binding machine 2 and used in a downward direction, it is necessary to swing up the extension handle 200 every time a binding operation is performed. According to the extension handle 200 described above, the relative positional relationship of the cuff member 114 to the gripping member 212 can be adjusted so that the cuff member 114 appropriately contacts the user's arm, so that the extension handle 200 can be swung up. can be easily done.

In addition, in the above-mentioned Examples 1 and 2, the case where the extension handles 100, 200 are used by being attached to the reinforcing bar binding machine 2 was explained, but the extension handles 100, 200 may also be used by attaching them to other types of power tools. You can. Further, in the first and second embodiments described above, the extension handles 100 and 200 do not need to include the support pipe 112 and the cuff member 114.

Although specific examples of the present invention have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The techniques described in the claims include various modifications and changes to the specific examples illustrated above. The technical elements described in this specification or the drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims as filed. Furthermore, the techniques illustrated in this specification or the drawings can achieve multiple objectives simultaneously, and achieving one of the objectives has technical utility in itself.

2 : Rebar binding machine 3 : Housing 4 : Main body part 5 : Reel cover 6 : Gripping part 7 : Cover holding part 8 : Battery mounting part 10 : Reel 10a : Engagement part 12 : Feeding mechanism 14 : Guide mechanism 16 : Brake mechanism 18 : Cutting mechanism 20 : Twisting mechanism 22 : Feed motor 24 : Drive roller 26 : Driven roller 28 : Guide pipe 30 : Upper curl guide 32 : Lower curl guide 34 : First guide path 38 : Guide pin 40 : Cutter 42 : Feedback plate 46: Solenoid 48: Link 50: Brake arm 52: Link 54: Torsion motor 56: Reduction mechanism 58: Screw shaft 60: Sleeve 61: Push plate 62: Hook 64: First operating section 74: Main switch 76: Main Power LED
84: Trigger 86: Trigger switch 90: Second operation section 96: Display LED
98 : Setting switch 100 : Extension handle 102 : Tool holder 103 : Extension part 104 : Extension pipe 104a : Long hole 104b : Long hole 106 : Link mechanism 108 : Handle housing 108a : Auxiliary grip attachment part 110 : Bracket 111 : Connection part 112 : Support pipe 113 : Arm support part 114 : Cuff member 120 : Front link 122 : Back link 124 : Shaft 126 : Compression spring 128 : Slider 128a : Through hole 128b : Screw hole 130 : Bolt 131 : Cover 132 : Slider 132a : Penetration Hole 132b: Screw hole 134: Bolt 134a: Head 134b: Shaft 136: Sleeve 140: Fixing member 142: Gripping member 143: Connection member 144: Supporting member 144a: Groove 144b: Long hole 144c: Wrench mounting groove 144d: Wrench mounting groove 145 : Hex wrench 145a : Short side 145b : Long side 146 : Bottom wall 148 : Right wall 150 : Left wall 151 : Sheath part 152 : Right side protrusion 154 : Left side protrusion 156 : Top wall 158 : Hinge part 159 : Hinge pin 160 : Fastening member 162 : Bolt 162a : Head 162b : Shaft part 164 : Washer 166 : Grip nut 170 : Right side holder 170a : Clamping part 170b : Lock part 170c : Fixed part 170d : Male thread 170e : Opening 172 : Left side Holder 172a: Holding part 172b: Locking part 172c: Notch 172d: Opening 174: Hinge 176: Tightening lever 180: Tool holder 182: Right holder 182a: Holding part 182b: Locking part 182c: Fixed part 182d: Male thread 182e: Opening 184 : Left side holder 184a : Holding part 184b : Lock part 184c : Notch 184d : Opening 186 : Hinge 188 : Tightening lever 190 : Auxiliary grip 200 : Extension handle 202 : Handle housing 204 : Bracket 205 : Connection part 210 : Fixed Member 212: Grip member 212a: Mounting portion 216: Sheath portion 218: Right side protrusion 220: Left side protrusion 222: Rubber washer 224: Rubber washer 226: Fastening member 228: Bolt 228a: Head 228b: Shaft 230: Grip nut

Claims (8)

An extension handle used by being attached to a power tool,
an extension for holding the power tool;
a relay part that is connected to the extension part and includes a grip member that is gripped by a user ; and a support member that is fixed in position with respect to the grip member ;
an operation section that is provided near the gripping member and accepts an operation from the user to operate the power tool;
an arm support section including a cuff member that contacts the arm of the user ; and a support beam to which the cuff member is fixed ;
comprising a connecting part that connects the support beam and the relay part ,
The connecting portion is
a sheath portion having a shape that partially covers an outer peripheral surface of the support beam; a first protrusion extending from one circumferential end of the sheath portion; and a first protrusion extending from the other circumferential end of the sheath portion. a connecting member including a second protrusion;
an adjustment member including a first adjustment member and a second adjustment member that sandwich the support member, the first protrusion, and the second protrusion;
The connecting member is rotatably supported by the gripping member around a rotation axis provided on the gripping member,
When the distance between the first adjustment member and the second adjustment member is widened, movement of the support beam with respect to the relay portion in the longitudinal direction of the support beam is permitted, and movement of the support beam with respect to the relay portion is permitted. Rotation around the rotation axis is allowed,
When the distance between the first adjustment member and the second adjustment member is narrowed, movement of the support beam with respect to the relay portion in the longitudinal direction of the support beam is prohibited, and movement of the support beam with respect to the relay portion is prohibited. An extension handle that is prohibited from rotating around the rotation axis. The extension handle of claim 1 , wherein the support member is located between the gripping member and the power tool. The extension handle according to claim 1 or 2 , wherein the power tool is a reinforcing bar tying machine. The extension handle according to any one of claims 1 to 3 , further comprising an auxiliary grip that is detachably attached to the relay part and that is held by a hand other than a hand that holds the gripping member of the user. . 5. The extension handle of claim 4 , wherein the auxiliary grip is located on the opposite side of the gripping member from the extension when the extension handle is viewed from a longitudinal direction of the extension. An extension handle used by being attached to a power tool,
a tool holder that holds the power tool;
an extension connected to the tool holder ;
a handle housing that is movable in a front-back direction with respect to the extension part;
an operation section that is provided on the handle housing and receives an operation from a user to operate the power tool;
a support beam movable in the front and back direction with respect to the handle housing;
a cuff member connected to the support beam and abutting the user's arm ,
The handle housing includes a fixed part that supports the extension part, a grip part that extends downward from the rear part of the fixed part and in which the operating part is disposed, and a support part that extends downward from the front part of the fixed part. An extension handle, comprising: a connection part that connects a lower part of the grip part and a lower part of the support part and supports the support beam . 7. The extension handle of claim 6, further comprising a hex wrench retained in the handle housing. The extension handle according to claim 6 or 7, further comprising an auxiliary grip that is detachable from the upper surface of the fixed part, extends upward from the fixed part, and is disposed on the opposite side of the grip part when viewed from the extension part. .

Images