End machine

Abstract

To reduce a burden during binding work by allowing an operator to select a gripping position of a grip.SOLUTION: A reinforcement binding machine 1E comprises: a first main body portion 100E; a second main body portion 200 having a curl guide 230A curling a wire along a circumference of an object to be bound that is inserted into an opening and a twisting portion 250 including a twisting shaft twisting the curled wire; and a connecting portion 300 connecting the first main body portion 100E and the second main body portion 200. The first main body portion 100E comprises handle portions 150R, 150L having a pair of grips 151R, 151L capable of being gripped by an operator. The handle portions 150R, 150L include grip connecting portions 152R, 152L connecting the grips 151R, 151L and the first main body portion 100E. The grips 151R, 151L are formed in an annular shape, and extend diagonally upward or diagonally downward on both sides of an axial line A2 of the connecting portion 300 or an extension line of the axial line A2, when a direction of an axial line A1 of the twisting shaft is taken as a vertical direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tying machine for tying objects to be tied such as reinforcing bars with a wire or the like.

Background Art

[0002] Conventionally, there has been proposed a reinforcing bar tying machine that winds a wire around a reinforcing bar by a guide portion and twists the wire by a twisting portion to tie a plurality of reinforcing bars (see, for example, Patent Document 1).

[0003] In addition, there has been proposed a tying machine in which a guide portion that curls a wire along the periphery of a reinforcing bar and a twisting portion that twists the wire are arranged at positions away from a handle portion (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] For example, if the grip position of the handle portion is fixed, when tying a reinforcing bar placed on the floor surface, the operator has to work in a bent-forward position, which places a great burden on the operator's waist and the like. On the other hand, in the tying machine described in Patent Document 2, the handle is connected to another part of the machine via a telescopic portion in order to change the handle position. And it is said that the overall length of the machine, that is, the length from the guide portion to the handle, is adjusted by changing the length of the telescopic portion according to the corresponding work and the height of the operator.

[0006] However, if the configuration is such that the length of the telescopic portion can be changed as in Patent Document 2, there is a risk that the internal wiring process will become complicated or the electrical efficiency will deteriorate due to an increase in the length of the electric wire.

[0007] As a method for adjusting the overall length of the tying machine, a method of replacing a part (hereinafter referred to as a connecting part) that connects the handle part and the tying machine main body part having a twisting part etc. can be considered. In that case, since it is necessary to remove the connecting part from the handle part and the tying machine main body part and reassemble the connecting part with different lengths, the handle part, and the tying machine main body part again, the replacement work is complicated and there is a possibility of incorrect assembly. Further, when electrical wiring is arranged inside or on the outer periphery of the connecting part, there is a possibility of problems such as disconnection occurring due to removal and reconnection of the wiring.

[0008] The present invention solves such problems, and an object thereof is to provide a tying machine capable of reducing the burden during the tying operation by enabling an operator to select the position where the grip is held.

Means for Solving the Problems

[0009] In order to solve the above-described problems, a tying machine according to the present invention includes a first main body part, a curl guide having an opening into which an object to be tied can be inserted, and curling a wire along the periphery of the object to be tied inserted into the opening, and a second main body part having a twisting part including a twisting shaft for twisting the curled wire, and a connecting part connecting the first main body part and the second main body part. The first main body part Symmetrically arranged with reference to the axis of the connecting portion or the extension line of the axis, includes a handle part having a pair of grips that can be held by an operator. The handle part has a grip connecting part that connects the grip and the first main body part. The grip Closed is annular Body When the axial direction of the twisting shaft is the vertical direction, The surface formed by the annular body is extends obliquely upward or obliquely downward on both sides of the axis of the connecting part or the extension line of the axis.

Effects of the Invention

[0010] According to the present invention, since the grips extend obliquely upward or obliquely downward on both sides of the axis of the connecting portion, etc., the operator can select the position where the grips are held, and the burden on the operator during the bundling operation can be reduced.

Brief Description of the Drawings

[0011]

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Mode for Carrying Out the Invention

[0012] Hereinafter, with reference to the drawings, an example of a steel bar tying machine as an embodiment of the tying machine of the present invention will be described.

[0013] <The First Embodiment> FIG. 1 is a side view showing the internal configuration of the reinforcing bar tying machine 1A according to the first embodiment, FIG. 2 is a side view showing the external configuration of the reinforcing bar tying machine 1A, FIG. 3 is a front view showing the external configuration of the reinforcing bar tying machine 1A, and FIGS. 4 and 5 are perspective views.

[0014] Further, FIG. 6 is a side view showing the main part configuration of the second main body part of the reinforcing bar tying machine 1A according to the first embodiment, FIG. 7 is a perspective view showing the main part configuration of the first main body part, and FIGS. 8 and 9 are front views showing a configuration example in which the grip height of the reinforcing bar tying machine 1A according to the first embodiment is variable.

[0015] Hereinafter, when the operator operates the reinforcing bar tying machine, the symbols indicating the parts located on the left hand side of the operator, etc. will be suffixed with "L", and the symbols indicating the parts located on the right hand side, etc. will be suffixed with "R" for explanation. The handle part 122L is the handle part on the left hand side of the operator, and the handle part 122R is the handle part on the right hand side of the operator.

[0016] [Configuration example of the reinforcing bar tying machine 1A] The reinforcing bar tying machine 1A includes a first main body part 100 having a pair of grips 120L and 120R that can be gripped by an operator, a second main body part 200 having an opening into which an object to be tied can be inserted, a curl guide 230A that curls a wire W along the periphery of the object to be tied inserted into the opening, and a twisting part 250 that twists the wire W curled by the curl guide 230A, and a connecting part 300 that connects the first main body part 100 and the second main body part 200.

[0017] In the first embodiment, the axis of the twisting shaft 253 that rotates by the rotation of the twisting motor 251 disposed in the twisting part 250 of the second main body part 200 is designated as A1. Also, the axis of the connecting part 300 is designated as A2. Further, the axes of the grip 120L gripped by the operator's left hand and the grip 120R gripped by the operator's right hand are designated as grip axis A3L and grip axis A3R, respectively.

[0018] In addition, in the present embodiment, the side where the curl guide 230 is provided is the tip side or the lower side of the rebar tying machine 1A, and the opposite side, that is, the end side of the first main body 100 is the base end side or the upper side of the rebar tying machine 1A. When the tip of the curl guide 230 is directed in the direction of gravity, the rebar tying machine 1A has a configuration in which the second main body 200, the connecting portion 300, and the first main body 100 are arranged in order from the lower side to the upper side.

[0019] Also, when operating the rebar tying machine 1A, the side where the operator holding the grips 120L and 120R stands is defined as the back side of the rebar tying machine 1A, and the opposite side is defined as the front side of the rebar tying machine 1A. The sides where the grips 120L and 120R are located are respectively defined as the sides of the rebar tying machine 1A, the grip 120R side is defined as the right side of the rebar tying machine 1A, and the grip 120L side is defined as the left side of the rebar tying machine 1A.

[0020] The first main body 100 includes handle portions 122L and 122R each having a pair of grips 120L and 120R, a grip attachment portion 130 having a plurality of grooves to which the handle portions 122L and 122R can be attached, a first housing 102 that supports the upper end side of the long connecting portion 300, and a battery mounting portion 140 to which a battery 142 serving as a power source is detachably attached. The first housing 102 has its tip side connected to the connecting portion 300, and a setting portion 144 for setting various operating conditions of the rebar tying machine 1A is provided on the base end side.

[0021] As shown in FIGS. 4 and 5, the handle portions 122L and 122R are formed of long members having a U shape or an M shape when viewed from the direction D3 of the axis A2 of the connecting portion 300. At least one of the grips 120L and 120R is provided with an operation switch 146 (see FIG. 1) for starting the tying operation.

[0022] The handle part 122L includes a grip 120L and a grip connection part 121L, and the handle part 122R includes a grip 120R and a grip connection part 121R. The grips 120L and 120R are attached to the grip attachment part 130 via the grip connection parts 121L and 121R respectively (see Fig. 7(a)). Note that the handle parts 122L and 122R can adopt various shapes, such as linear when viewed from the axial direction D3 of the connection part 300, or U-shaped or M-shaped when viewed from the front or back direction.

[0023] When the operator holds and operates the grips 120L and 120R, the grips 120L and 120R are provided on both sides of the axis A1 of the torsion shaft 253 when viewed from the operator side, and the positions of the grips 120L and 120R can be changed in the direction of the axis A1 of the torsion shaft 253.

[0024] In order to improve the operability when the operator holds the grips 120L and 120R, as shown in Fig. 1, it is preferable that the grip axes A3L and A3R (not shown) and the axis A1 of the torsion shaft 253 are orthogonal or substantially orthogonal. However, it is not limited to this, and the grip axes A3L and A3R may have an angle of substantially orthogonal or more, for example, an angle of 5 degrees or more, upward or downward with respect to the axis A1 of the torsion shaft 253. Also, the angles of the grip axes A3L and A3R with respect to the gravity direction can be appropriately adjusted by changing the connection angles of the grips 120L, R and the grip connection parts 121L, R.

[0025] The grip attachment portion 130 is formed in a substantially rectangular parallelepiped shape and is attached to the front side of the first housing 102. Mounting mechanisms for attaching handle portions 122L and 122R, each having a pair of grips 120L and 120R, are provided on each of the upper, lower, left, and right side surfaces of the grip attachment portion 130. As the mounting mechanism, for example, the grip attachment portion 130 is composed of a pair of attachment members, a plurality of groove portions for fitting the grips 120R and 120L are formed on the opposing surfaces of the respective attachment members, and the grip connecting portions 121R and 121L are fitted into the respective groove portions and sandwiched between the pair of attachment members, so that the grips 120R and 120L can be fixed to the grip attachment portion 130. Of course, other known mounting mechanisms can also be adopted.

[0026] Note that it is also possible to adopt a configuration in which handle portions 122L and 122R, each having a pair of grips 120L and 120R, are attached to the first housing 102 without providing the grip attachment portion 130 on the first main body portion 100. In that case, the first housing 102 may be provided with a mounting mechanism including a plurality of groove portions.

[0027] The battery mounting portion 140 is provided on the first housing 102 so as to be located above the handle portions 122L and 122R. The battery mounting portion 140 is arranged on the extension line of the axis A2 of the connecting portion 300.

[0028] The setting portion 144 is a part for adjusting the number of turns of the wire W, the torsional torque of the wire W, etc., and is composed of, for example, a dial-type or push-button type switch (see FIGS. 1 and 2).

[0029] Next, an example of setting the grip height H will be described. In FIG. 1, with the reinforcement surface F as the reference position on the lower side of the grip height H and the grip axis A3L as the reference position on the upper side, the height up to the grip axis A3L is shown as the grip height H. Here, the reinforcement surface F means the surface on which the object to be bundled is reinforced. For example, as shown by the dotted line in FIG. 1, it may be the surface connecting the centers of the cross-sections of the upper and lower two steel bars S that are reinforced. When the grip axes A3L and A3R and the axis A1 of the twisting shaft 253 are orthogonal or substantially orthogonal, as shown by the dotted line in FIG. 1, it is preferable to set the position on the grip axis A3L as the reference position on the upper side of the grip height H. When the grip axes A3L and A3R and the axis A1 of the twisting shaft 253 are not orthogonal or substantially orthogonal, any point on the grip axes A3L and A3R, for example, the central position, may be set as the reference position on the upper side of the grip height H.

[0030] As shown in FIG. 1, the second main body 200 includes a second housing 202, a reel housing portion 210 that houses a wire reel 211 around which a wire W is wound, a wire feeding portion 220 that draws out and feeds the wire W from the wire reel 211 housed in the reel housing portion 210, a curl guide 230A that imparts a curl to the wire W and curls it along the periphery of the object to be bundled, a cutting portion 240 that cuts the wire W curled by the curl guide 230A, and a twisting portion 250 that twists the wire W curled by the curl guide 230A and cut by the cutting portion 240. A curl guide 230A is provided at the tip of the second housing 202, and the wire feeding portion 220, the cutting portion, and the twisting portion 250 are housed inside the second housing 202. Further, the second main body 200 includes a contact member 233 that operates a second guide portion 232A (to be described later) of the curl guide 230A when the steel bar S abuts thereon, and a cover portion 206 that covers the lower end portion of the second housing 202.

[0031] The wire feeding section 220 is provided between the reel housing section 210 and the curl guide 230A, and has a pair of feeding gears for feeding the wire. The pair of feeding gears of the wire feeding section 220 are configured to be rotatable forward and backward by the drive of a motor (not shown). Thereby, when the feeding gears are rotated forward, the wire W can be fed toward the curl guide 230A, and when the feeding gears are rotated backward, the wire W can be pulled back toward the reel housing section 210.

[0032] The curl guide 230A has an opening 260 into which the reinforcing bar S can be inserted, and curls the wire W along the periphery of the reinforcing bar S inserted into the opening 260. The curl guide 230A is provided to protrude further forward (in the first direction D1) from the tip of the second housing 202, and is composed of a pair of guide portions, that is, a first guide portion 231A and a second guide portion 232A. The first guide portion 231A and the second guide portion 232A are arranged with a predetermined interval L that forms the opening 260 in the second direction D2 orthogonal to the first direction D1. The first guide portion 231A regulates the traveling direction of the wire W sent from the wire feeding section 220 and gives a curl to the wire W. The second guide portion 232A receives the wire W with a curl formed by the first guide portion 231A and guides it to the twisting section 250. When binding the reinforcing bar S, the reinforcing bar S is inserted into the opening between the first guide portion 231A and the second guide portion 232A.

[0033] As shown in FIGS. 6(a) and 6(b), the cover portion 206 is composed of a metal plate material or the like, and is attached so as to cover the lower end portion of the second housing 202 between the base end side of the first guide portion 231A and the base end side of the second guide portion 232A.

[0034] The contact member 233 is rotatably supported by a shaft 236 attached to the cover portion 206. The contact member 233 is a dogleg (angled) shaped member, and has a pair of contact portions 234 (only one contact portion is shown in FIGS. 6(a) and 6(b)) where the reinforcing bar S abuts on one side of the first guide portion 231A with the shaft 236 interposed therebetween, and a pressing portion 235 extending to the second guide portion 232A side.

[0035] The contact portion 234 is disposed at a position where the reinforcing bar S inserted into the opening 260 can contact, and the pressing portion 235 is in contact with the second guide portion 232A. When the contact member 233 rotates about the shaft 236 as the contact portion 234 is pressed against the reinforcing bar S and moves in a direction opposite to the first direction D1. When the contact member 233 rotates due to the contact portion 234 being pressed against the reinforcing bar S, the pressing portion 235 presses the second guide portion 232A in a direction approaching the first guide portion 231A. As a result, the second guide portion 232A moves from an open position opened with respect to the first guide portion 231A to a closed position closed. In this way, until the reinforcing bar S contacts the contact portion 234, since the second guide portion 232A is open with respect to the first guide portion 231A, it becomes easier to insert the reinforcing bar S into the opening 260 of the curl guide 230A. In particular, in the reinforcing bar bundling machine 1A having a long overall length as in the present embodiment, since the bundling position is away from the operator, it is difficult to insert the reinforcing bar S. Therefore, when the second guide portion 232A is open at the time of bundling, it becomes easier to insert the reinforcing bar S into the opening 260 of the curl guide 230A.

[0036] The twisting portion 250 includes a twisting motor 251, a speed reduction mechanism 252 that performs speed reduction and torque amplification of the twisting motor 251, a twisting shaft 253 connected to the speed reduction mechanism 252 and rotated by the rotation of the twisting motor 251, a movable member 254 displaced by the rotational operation of the twisting shaft 253, and a holding portion 255 that protrudes from the tip side of the movable member 254 and holds and twists the wire W.

[0037] Threads are respectively formed on the outer peripheral surface of the twisting shaft 253 and the inner peripheral surface of the movable member 254, and the thread of the twisting shaft 253 is screwed into the thread of the movable member 254. The movable member 254 moves in the front-rear direction when the twisting shaft 253 rotates while the rotation is restricted, and rotates integrally with the twisting shaft 253 when the rotation restriction is released.

[0038] The holding portion 255 has a plurality of claw portions for holding the wire W. The holding portion 255 opens and closes in accordance with the movement of the movable member 254 in the front-rear direction and rotates in accordance with the rotational operation of the movable member 254.

[0039] The connecting part 300 is a hollow elongated member, and wiring is laid inside. The connecting part 300 is composed of a rod-shaped member thinner than the diameters of the first main body part 100 and the second main body part 200. The length of the connecting part 300 is selected according to, for example, the average height of the operator. For the connecting part 300, metals such as aluminum and stainless steel, non-metals such as resin and carbon fiber can be used. Thereby, the weight of the entire rebar tying machine 1A can be reduced.

[0040] The proximal end side (upper end part) of the connecting part 300 is attached to the first housing 102, and the distal end side (lower end part) of the connecting part 300 is attached to the second main body part 200. The connecting part 300 can be configured to be detachable from the first main body part 100 and the second main body part 200.

[0041] The wiring laid inside the connecting part 300 is connected to the battery 142 and the operation switch 146 of the first main body part 100, the control device of the second main body part 200, etc. Thereby, communication of electrical signals between the first main body part 100 and the second main body part 200 becomes possible, and power supply from the first main body part 100 to the second main body part 200 becomes possible.

[0042] [Operation example of the rebar tying machine 1A] When tying the rebar S, the operator inserts the rebar S into the opening 260 between the first guide part 231A and the second guide part 232A, and presses the rebar S against the contact part 234 of the contact member 233. Along with this, the contact member 233 rotates with the shaft 236 as a fulcrum, the second guide part 232A is pushed by the pressing part 235, and the second guide part 232A moves from the open position to the closed position. The operator turns on the operation switch 146 in a state where the second guide part 232A is closed, and the tying operation is started.

[0043] When the operation switch 146 is turned on, a pair of feed gears of the wire feed unit 220 sandwich and rotate the wire W, and send out the wire W from the wire reel 211 toward the curl guide 230A. The wire W sent by the wire feed unit 220 is curled by the curl guide 230A and then the curled wire W is wound around the reinforcing bar S a plurality of times. The number of times (winding number) of winding the wire W around the reinforcing bar S can be set by the setting unit 144. After the wire W wound around the reinforcing bar S a plurality of times is cut by the cutting unit, it is twisted by the twisting unit 250. By such an operation, the reinforcing bar S can be bundled with the wire W.

[0044] Next, details of the grip attachment portion 130 of the first main body portion 100 in the reinforcing bar bundling machine 1A according to the first embodiment will be described with reference to FIG. 7. FIG. 7(a) is a perspective view of the external configuration of the first main body portion 100, and FIG. 7(b) is a perspective view of the internal configuration of the grip attachment portion 130.

[0045] The grip attachment portion 130 includes grip attachment members 135a and 135b, and the grip attachment members 135a and 135b are screwed together by six screw holes 136 and screws. Semi-circular grooves are respectively formed in the grip attachment members 135a and 135b, and in the combined state, a groove portion that matches the shapes of the grip connection portions 121L and 121R is formed.

[0046] FIG. 7(a) shows the external appearance of the first main body portion 100 when the pair of grips 120L and 120R are attached to the grip attachment portion 130 via the grip connection portions 121L and 121R. Further, FIG. 7(b) shows the external appearance of the grip attachment portion 130 with the grip attachment member 135a removed.

[0047] The grip attachment portion 130 includes a plurality of groove portions in the axial direction A1 of the twisting shaft 253. Thereby, by changing the groove portion to be used, it is possible to make the grip height H (see FIG. 1) in the axial direction A1 of the twisting shaft 253 variable. In the example shown in FIG. 7(b), there are a total of eight types of groove portions, four types on the left hand side and four types on the right hand side of the operator, and the structure is symmetric left and right.

[0048] The grip attachment portion 130 includes a right first groove 131R to a right fourth groove 134R into which the grip connection portion 121R is fitted and fixed, and a left first groove 131L to a left fourth groove 134L into which the grip connection portion 121L is fitted and fixed. The right first groove 131R and the left first groove 131L are provided on the upper right side surface and the upper left side surface of the grip attachment portion 130, respectively. The right second groove 132R and the right third groove 133R are provided on the right side surface of the grip attachment portion 130, and the left second groove 132L and the left third groove 133L are provided on the left side surface of the grip attachment portion 130. The right fourth groove 134R and the left fourth groove 134L are provided on the lower right side surface and the lower left side surface of the grip attachment portion 130, respectively.

[0049] Let the grip heights H in the state where the grip connection portion 121R is fixed to the right first groove 131R, the right second groove 132R, the right third groove 133R, and the right fourth groove 134R be heights HR1, HR2, HR3, and HR4, respectively. Similarly, let the grip heights H in the state where the grip connection portion 121R is fixed to the left first groove 131L, the left second groove 132L, the left third groove 133L, and the left fourth groove 134L be heights HL1, HL2, HL3, and HL4, respectively. Since the left and right groove portions have a bilaterally symmetric structure, the heights of HR1 and HL1, HR2 and HL2, HR3 and HL3, and HR4 and HL4 are the same, respectively. The grip height H is such that the heights of HR1 and HL1 are the highest, and HR2 and HL2, HR3 and HL3, and HR4 and HL4 are in descending order.

[0050] Figs. 1 to 5 and Fig. 7(a) show a state in which the grip connection portions 121L and 121R are respectively fitted and fixed into the left second groove 132L and the right second groove 132R of the grip attachment portion 130. The heights of the grips 120L and 120R are HL2 and HR2, respectively.

[0051] The grip height H can be changed by switching the position of the groove portion of the grip attachment portion 130 that fixes the grip connection portions 121L and 121R. When attaching the handle portions 122L and 122R to the grip attachment portion 130, first, with the grip attachment member 135a removed (see Fig. 7(b)), fit the grip connection portions 121L and 121R of the handle portions 122L and 122R into any one of the semi-circular grooves of the grip attachment member 135b. Next, combine the grip attachment member 135a with the grip attachment member 135b and screw them together with six screw holes 136 and screws.

[0052] When changing the grip height H, after removing the grip attachment member 135a, fit the grip connection portions 121L and 121R of the handle portions 122L and 122R into any one of the grooves of the grip attachment member 135b corresponding to the desired grip height. Then, by combining and screwing the grip attachment member 135a with the grip attachment member 135b again, the handle portions 122L and 122R are fixed to the grip attachment portion 130.

[0053] In the example shown in Fig. 7(b), the left first groove 131L to the left fourth groove 134L are arranged in a substantially radial pattern with the central portion near the center of the left side portion of the grip attachment portion 130 as the center point. Similarly, the right first groove 131R to the right fourth groove 134R are arranged in a substantially radial pattern with the central portion near the center of the right side portion of the grip attachment portion 130 as the center point.

[0054] The left first groove 131L and the right first groove 131R located above the grip attachment portion 130, and the left fourth groove 134L and the right fourth groove 134R located below the grip attachment portion 130 extend in the direction of the axis A1 of the torsion shaft 253, and each constitutes a groove portion to which the grips 120L and 120R can be attached.

[0055] The direction in which the groove portion extends is not limited to the example shown in FIG. 7(b). For example, in order to simplify the structure of the grip attachment portion 130, the left second groove 132L and the left third groove 133L located on the left side surface of the grip attachment portion 130, and the right second groove 132R and the right third groove 133R located on the right side surface may be grooves that extend horizontally in the left-right direction. Also, in order to simplify the structure of the grip attachment portion 130 and improve the workability when the operator holds and works with the grip 120L or 120R with one hand, the right first groove 131R and the left first groove 131L located on the upper side of the grip attachment portion 130 may be grooves that extend vertically upward.

[0056] Also, the types of groove portions are not limited to eight types on both the left and right sides described above. It is sufficient if either the left or right side has two or more types, and both sides have three or more types. Further, the cross-sectional shape of each groove portion is not limited to circular or substantially circular, and may be a polygon such as a quadrilateral. The shapes of the grip connecting portions 121L and 121R may be changed according to the shape of the groove portion and the direction in which the groove portion extends.

[0057] Next, with reference to FIGS. 8 and 9, a configuration example of the rebar tying machine 1A when the grip height is changed will be described.

[0058] In the example shown in FIG. 8(a), the grip connecting portions 121R and 121L are fixed to the right third groove 133R and the left third groove 133L, respectively. The grip heights HR3 and HL3 are lower than the grip heights HR2 and HL2 shown in FIG. 3. Therefore, even an operator with a short stature can hold the grips 120R and 120L in a posture that does not impose a burden on the body and operate the rebar tying machine 1A.

[0059] In the example shown in FIG. 8(b), the grip connecting portions 121R and 121L are fixed to the right first groove 131R and the left first groove 131L, respectively. The grip heights HR1 and HL1 are higher than the grip heights HR2 and HL2 shown in FIG. 3. Therefore, even an operator with a tall stature can hold the grips 120R and 120L in a posture that does not impose a burden on the body and operate the rebar tying machine 1A.

[0060] In the example shown in FIG. 8(c), the grip connecting portions 121R and 121L are respectively fixed to the right fourth groove 134R and the left fourth groove 134L. The grip heights HR1 and HL1 are lower than the height grips HR3 and HL3 shown in FIG. 8(a). Further, since the grip connecting portions 121R and 121L are arranged such that the distance between the grips 120R and 120L is smaller than the horizontal width of the grip mounting portion 130, it is possible to reduce the storage space of the rebar tying machine 1A.

[0061] In the above description, the case where the heights H of a pair of grips are the same has been described. In the rebar tying machine 1A, the height in the direction of the axis A1 of the twisting shaft 243 can be individually changed between one grip and the other grip when the operator holds and operates the pair of grips. An example in which the grip heights H are made different on the left hand side and the right hand side of the operator will be described with reference to FIG. 9.

[0062] In the example shown in FIG. 9(a), the grip connecting portions 121R and 121L are respectively fixed to the right second groove 132R and the left first groove 131L. By doing so, it is possible to set the height H of the grip 120R to HR2, which is lower than the height HL1 of the grip 120L.

[0063] In the example shown in FIG. 9(b), the grip connecting portions 121R and 121L are respectively fixed to the right third groove 133R and the left first groove 131L. By doing so, it is possible to change the height H of the grip 120R to HR3, which is lower than HR2, as compared with FIG. 9(a).

[0064] In the example shown in FIG. 9(c), the grip connecting portions 121R and 121L are respectively fixed to the right first groove 131R and the left second groove 132L. The heights of the left and right grips are reversed compared to FIG. 9(a). For example, by switching between the states of FIGS. 9(a) and 9(c) according to the difference in the dominant hand of the operator, it is possible to improve the operability.

[0065] The combination of the grip heights H of the grips 120L and 120R can also be other than the combinations shown in FIGS. 8(a) to 8(c) and FIGS. 9(a) to 9(c). Also, in FIGS. 8(a) to 8(c) and FIGS. 9(a) to 9(c), an example of the case where the operator grips the left and right grips 120L and 120R has been described. However, it is also possible for the operator to grip only one of the grips 120L and 120R and operate the rebar tying machine 1A.

[0066] For example, with the grip connecting parts 121R and 121L fixed to the right first groove 131R and the left fourth groove 134L respectively, the operator can grip the grip 120R with the right hand and operate the rebar tying machine 1A with only the right hand. Or, the operator can grip the grip 120R with the right hand and grip the grip 120L or the connecting part 300 with the left hand and operate. Or, with only the grip connecting part 121R fixed to the right first groove 131R, the operator can grip the grip 120R with the right hand and grip the connecting part 300 with the left hand and operate. When the working space on the right or left side of the operator is narrow, etc., the workability can be improved by performing the work while gripping only one of the left and right grips.

[0067] [Effects of the First Embodiment] As described above, according to the rebar tying machine 1A of the first embodiment, it is possible to change the left and right grip heights in the direction of the axis A1 of the twisting shaft according to the operating environment, the difference in the height of the operator, the difference in the dominant arm, and the difference in preferences. In this way, since it is not necessary to change the length of the connecting part in order to change the grip height, the internal wiring process does not become complicated, and the electrical efficiency does not deteriorate due to the extension of the wire length.

[0068] In addition, the change in the grip height H in the steel bar tying machine 1A of the first embodiment is achieved by fitting and fixing the handle parts 122L and 122R at the position of the groove corresponding to the desired grip height from among the plurality of grooves provided in the grip attachment part 130. Therefore, compared with the case of fixing the extended part with a screw or the like as in the prior art, the structure is more robust, and there is no concern that displacement may occur during operation and the overall length of the tying machine may change. Also, the adjustable range of the grip height can be made larger than that of the structure that extends the telescopic part as in the prior art. Further, compared with the method of adjusting the overall length of the tying machine by replacing the connecting part, the operation required to change the grip height is simple, and the risk of misassembly and the risk of disconnection of the wiring can also be reduced. Since the operator can easily change the grip height every time the working environment or the like changes, workability is also improved.

[0069] Also, the steel bar tying machine 1A of the first embodiment may have a structure in which the grip attachment part 130 and the handle parts 122L and 122R are provided on the first main body part 100. For the configurations of the second main body part 200, the connecting part 300, etc., the basic configuration of the existing tying machine can be utilized. Therefore, compared with the case of adjusting the overall length of the tying machine by replacing the connecting part, the wiring of the connecting part does not become complicated, and a steel bar tying machine with better power efficiency than the prior art can be obtained.

[0070] <Modification Example of the First Embodiment> Note that in the first embodiment, the steel bar tying machine 1A is configured to start the tying operation by turning on the operation switch 146, but it is not limited thereto. For example, instead of starting the tying operation by turning on the operation switch 146, the tying operation may be started when it is detected that the steel bar S has come into contact with the contact member 233. In this case, since it is not necessary to turn on the operation switch 146 to tie the steel bar S, workability is improved.

[0071] Also, the binding operation may not be started just by the reinforcing bar S coming into contact with the contact member 233, and may be started when the reinforcing bar S comes into contact with the contact member 233 with the operation switch 146 turned on. In this case, if the operation switch 146 is turned on, the reinforcing bars S can be bound one after another, so the workability is excellent. Moreover, if the operation switch 146 is not turned on, the binding operation will not start even if the reinforcing bar S is brought into contact with the contact member, so the execution of an inadvertent binding operation can be suppressed. As a specific structure of this modification, for example, an operation switch that switches between on / off according to the rotational movement of the contact member 233 may be arranged near the contact member 233, and the binding operation may be executed when this operation switch is turned on. For the operation switch, for example, a mechanical switch or a sensor such as a Hall IC can be used.

[0072] When binding the reinforcing bar S, the operator inserts the reinforcing bar S into the opening 260 between the first guide portion 231A and the second guide portion 232A with the operation switch 146 turned on. Thereby, the reinforcing bar S is pressed against the contact portion 234 of the contact member 233, and when the contact member 233 rotates about the shaft 236 as a fulcrum and moves to, for example, the operating position, the second switch is turned on. A control portion (not shown) provided in the second main body portion 200 starts the binding operation when both the operation switch 146 and the operation switch are in the on state. The second guide portion 232A moves from the open position to the closed position by the rotation of the contact member 233.

[0073] <Second Embodiment> Figs. 10(a) and 10(b) are perspective views showing the external configuration of the steel bar bundling machine 1B according to the second embodiment, and Figs. 11(a) and 11(b) are side views showing the external configuration of the steel bar bundling machine 1B. In the steel bar bundling machine 1B according to the second embodiment, a pair of grips are rotatably provided with respect to the first main body portion, and by rotation, the position of the grip can be changed in the direction of the axis A1 of the twisting shaft. In the steel bar bundling machine 1B of the second embodiment, components substantially common to the steel bar bundling machine 1A of the first embodiment described in Figs. 1 to 9 are denoted by the same reference numerals, and only different components will be described in detail.

[0074] [Configuration example of steel bar bundling machine 1B] The steel bar bundling machine 1B includes a first main body portion 100B having rotation handle portions 125L and 125R, a second main body portion 200 having an opening into which an object to be bundled can be inserted, a curling guide 230A that curls a wire W along the periphery of the object to be bundled inserted into the opening, and a twisting portion 250 that twists the wire W curled by the curling guide 230A, and a connecting portion 300 that connects the first main body portion 100B and the second main body portion 200.

[0075] The first main body portion 100B includes rotation handle portions 125L and 125R, a rotation grip attachment portion 137, a first housing 102 that supports the upper end side of the long connecting portion 300, and a battery mounting portion 140 to which a battery 142 as a power source is detachably attached.

[0076] The rotation grip attachment portion 137 is formed in a substantially rectangular parallelepiped shape and is attached to the back side of the first housing 102. Mounting mechanisms for attaching the rotation handle portions 125L and 125R are provided on the left and right side surfaces of the grip attachment portion 130, respectively.

[0077] The rotation handle parts 125L and 125R of the first main body part 100B each include a grip part composed of a first grip part and a second grip part. The grip part held by the operator's left hand has a first grip part 123L1 and a second grip part 123L2, and the grip part held by the operator's right hand has a first grip part 123R1 and a second grip part 123R2. Also, the axes of the first grip parts 123L1 and 123R1 are defined as grip axes A4L1 and A4R1 respectively. Similarly, the axes of the second grip parts 123L2 and 123R2 are defined as grip axes A4L2 and A4R2 respectively.

[0078] The rotation handle part 125L includes a first grip part 123L1, a second grip part 123L2, and a rotation grip connection part 124L. One end of the second grip part 123L2 is connected to the first grip part 123L1, and the other end is connected to the rotation grip connection part 124L. Similarly, the rotation handle part 125R includes a first grip part 123R1, a second grip part 123R2, and a rotation grip connection part 124R. One end of the second grip part 123R2 is connected to the first grip part 123R1, and the other end is connected to the rotation grip connection part 124R. The rotation grip connection parts 124L and 124R are attached to the rotation grip attachment part 137.

[0079] FIG. 10(a) and FIG. 11(a) are a perspective view and a side view respectively of the first main body part 100B when the operator holds the first grip parts 123L1 and 123R1 during the operation of the steel bar bundling machine 1B. FIG. 10(b) and FIG. 11(b) are a perspective view and a side view respectively of the first main body part 100B when the operator holds the second grip parts 123L2 and 123R2 during the operation of the steel bar bundling machine 1B.

[0080] As shown in FIGS. 10(a) and 10(b), the first grip part 123L1 and the second grip part 123L2 are connected such that their respective grip axes A4L1 and A4L2 are non-parallel and not linear. The connection state of the first grip part 123R1 and the second grip part 123R2 is the same.

[0081] Also, as shown in Fig. 10(a), it is preferable that the grip axis A4L1 of the first grip portion 123L1 and the grip axis A4R1 of the first grip portion 123R1 be parallel or substantially parallel. As shown in Fig. 10(b), it is preferable that the grip axis A4L2 of the second grip portion 123L2 and the grip axis A4R2 of the second grip portion 123R2 be parallel or substantially parallel.

[0082] As shown in Figs. 11(a) and 11(b), it is preferable that the grip axes A4L1, A4R1 of the first grip portions 123L1, 123R1 and the grip axes A4L2, A4R2 of the second grip portion during operation be orthogonal or substantially orthogonal to the axis A1 of the torsion axis 253. However, the present invention is not limited to this, and the axes may be at an angle of substantially orthogonal or more, for example, 5 degrees or more, upward or downward. The angles of the grip axes A4L1, A4R1 of the first grip portion and the grip axes A4L2, A4R2 of the second grip portion with respect to the gravitational direction during operation can also be appropriately adjusted by changing the connection angle between the first grip portions 123L1, 123R1 and the second grip portions 123L2, 123R2 and the connection angle between the second grip portions 123L2, 123R2 and the rotation grip connection portions 124L, 124R.

[0083] As shown in Fig. 11(a), a position where the grip axes A4L1, A4R1 of the first grip portions 123L1, 123R1 are orthogonal or substantially orthogonal to the axis A1 of the torsion axis 253 is defined as the first position. Also, as shown in Fig. 11(b), a position where the grip axes A4L2, A4R2 of the second grip portions 123L2, 123R2 are orthogonal or substantially orthogonal to the axis A1 of the torsion axis 253 is defined as the second position.

[0084] The rotation grip attachment portion 137 includes a rotation mechanism (not shown) for rotating the rotation handle portions 125L, 125R attached to the left and right of the rotation grip attachment portion 137, a rotation lock mechanism (not shown) for restricting the range of the rotation angle and locking the rotation at a predetermined rotation angle, and a rotation lock release switch (not shown) for releasing the rotation lock.

[0085] In the steel bar tying machine 1B, a grip part (rotating handle parts 125L and 125R) having first grip parts 123L1 and 123R1 and second grip parts 123L2 and 123R2 respectively rotates with respect to the first main body part 100B, so that the first grip parts 123L1 and 123R1 are in a first position (Fig. 11(a)) orthogonal to the axis A1 of the twisting shaft 253, and the second grip parts 123L2 and 123R2 are in a second position (Fig. 11(b)) orthogonal to the axis A1 of the twisting shaft 253. It is configured to be movable between them.

[0086] The height of the grip is configured such that the height of the first grip part 123L1 in the first position shown in Fig. 11(a) is higher than the height of the second grip part 123L2 in the second position shown in Fig. 11(b).

[0087] In the steel bar tying machine 1B, the grip height change operation performed by the operator will be described. When changing the grip position (height) from the first position (the states of Figs. 10(a) and 11(a)) to the second position (the states of Figs. 10(b) and 11(b)), the operator first operates the rotation lock release switch to release the rotation lock. Next, the operator grips the first grip parts 123L1 and 123R1 and pushes them downward, so that the rotating handle parts 125L and 125R rotate downward. When the rotation is executed to a predetermined angle, the rotation lock mechanism of the rotating grip mounting part 137 operates and the rotation is locked. This state is the state shown in Figs. 10(b) and 11(b), and the operator can start the operation of the steel bar tying machine 1B by gripping the second grip parts 123L2 and 123R2 positioned at a height lower than that of the first grip parts instead of the first grip parts 123L1 and 123R1. The reverse grip height change operation is the same as the operation described above.

[0088] In the above description, the case where the heights H of a pair of grips are the same has been described. In the steel bar tying machine 1B, the height in the direction of the axis A1 of the twisting shaft 243 can be individually changed between one grip and the other grip when the operator holds and operates the pair of grips. That is, the rotation handle parts 125L and 125R can rotate either simultaneously or individually. When rotating them individually, the rotation grip attachment part 137 may be provided with a rotation mechanism, a rotation lock mechanism, and a rotation lock release switch individually for each of the rotation handle parts 125L and 125R. Further, a switching mechanism and a switching operation switch for switching between the case where the rotation handle parts 125L and 125R rotate simultaneously and the case where they rotate individually may be further provided in the rotation grip attachment part 137 or the rotation handle parts 125L and 125R.

[0089] Also, in the above description, an example in which the grip height of the steel bar tying machine 1B is adjusted in two steps has been described, but it is also possible to set the grip height in three or more steps. In that case, the rotation grip attachment part 137 may be provided with a rotation lock mechanism that sets a rotation angle of three or more steps.

[0090] Note that it is also possible to adopt a configuration in which the rotation handle parts 125L and 125R are attached to the first housing 102 without providing the rotation grip attachment part 137 in the first main body part 100B. In that case, the first housing 102 may be provided with a rotation mechanism, a rotation lock mechanism, and a rotation lock release switch.

[0091] [Effects of the Second Embodiment] As described above, according to the steel bar tying machine 1B of the second embodiment, it is possible to individually change the left and right grip heights in the direction of the axis A1 of the twisting shaft according to the operating environment, the difference in the height of the operator, the difference in the dominant arm, and the difference in preferences. In this way, without extending the connecting part, the position (height) of the grip itself can be adjusted, so that the wiring process inside the connecting part does not become complicated, and the electrical efficiency does not deteriorate due to the extension of the wire length.

[0092] In addition, the steel bar tying machine 1B of the second embodiment may have a structure in which a rotating grip attachment portion 137 and rotating handle portions 125L and 125R are provided on the first main body portion 100B, and the configurations of the second main body portion 200, the connecting portion 300, etc. can utilize the basic configuration of an existing tying machine. Therefore, compared with the case where the overall length of the tying machine is adjusted by replacing the connecting portion, the wiring of the connecting portion does not become complicated, and a steel bar tying machine with better power efficiency than the prior art can be obtained.

[0093] In addition, since the grip height of the steel bar tying machine 1B of the second embodiment can be changed by rotating the rotating handle portions 125L and 125R, the working time required to change the grip height can be shortened compared with the steel bar tying machine 1A of the first embodiment.

[0094] <Third Embodiment> Figs. 12(a) and 12(b) are perspective views showing an example of the external configuration of the steel bar tying machine 1C according to the third embodiment, and Figs. 13(a) and 13(b) are side views showing the external configuration of the steel bar tying machine 1C. In the steel bar tying machine 1C of the third embodiment, the components that are substantially common to the steel bar tying machine 1A of the first embodiment described with reference to Figs. 1 to 9 are denoted by the same reference numerals, and only the different components will be described in detail.

[0095] [Configuration Example of Steel Bar Tying Machine 1C] The steel bar tying machine 1C includes a first main body portion 100C, a second main body portion 200 having an opening into which an object to be tied can be inserted, a curling guide 230A that curls a wire W along the periphery of the object to be tied inserted into the opening, and a twisting portion 250 that twists the wire W curled by the curling guide 230A, and a connecting portion 300C that connects the first main body portion 100C and the second main body portion 200 and has a pair of slide grips 126L and 126R that can be gripped by an operator.

[0096] The first main body portion 100C includes a first housing 102 that supports the upper end side of the long connecting portion 300, and a battery mounting portion 140 to which a battery 142 serving as a power source is detachably attached.

[0097] In addition to the configuration of the connecting portion 300 described in the first embodiment, the connecting portion 300C includes slide handle portions 128L and 128R each having a pair of slide grips 126L and 126R that can be gripped by an operator, a slide grip attachment portion 138, a wiring detour portion 320, and a slide groove 330. Attachment mechanisms for attaching the slide handle portions 128L and 128R are provided on the left and right side surfaces of the slide grip attachment portion 138, respectively.

[0098] Let the axes of the slide grip 126L gripped by the operator's left hand and the slide grip 126R gripped by the operator's right hand be the grip axis A5L and the grip axis A5R, respectively.

[0099] The slide handle portion 128L includes a slide grip 126L and a slide grip connecting portion 127L, and the slide handle portion 128R includes a slide grip 126R and a slide grip connecting portion 127R. The slide grips 126L and 126R are attached to the slide grip attachment portion 138 via the slide grip connecting portions 127L and 127R, respectively.

[0100] FIG. 12(a) and FIG. 13(a) are a perspective view and a side view, respectively, of the first main body portion 100C and the connecting portion 300C in a state where the slide grip attachment portion 138 to which the slide handle portions 128R and 128L are attached is located below the slide groove 330. FIG. 12(b) and FIG. 13(b) are a perspective view and a side view, respectively, of the first main body portion 100C and the connecting portion 300C in a state where the slide grip attachment portion 138 to which the slide handle portions 128R and 128L are attached is located above the slide groove 330.

[0101] The slide grip attachment part 138 is provided in the slide groove 330. The slide groove 330 includes a slide mechanism (not shown) for sliding the slide grip attachment part 138 to which the slide handle parts 128L and 128R are attached in the direction of the axis A2 of the connecting part 300C, a slide lock mechanism (not shown) for restricting the sliding range and locking the slide at a predetermined position, and a slide lock release switch (not shown) for releasing the lock.

[0102] The wiring detour part 320 is provided to connect the wiring laid inside the connecting part 300C to the first main body part 100C by detouring the slide groove 330. By providing the wiring detour part 320, the wiring is separated from the slide groove 330, so that it is possible to avoid the occurrence of defects such as disconnection of the wiring due to the sliding operation of the slide grip attachment part 138.

[0103] The slide grips 126L and 126R are provided on both sides of the axis A2 of the connecting part 300C when viewed from the operator side when the operator holds and operates the slide grips 126L and 126R, and the positions of the slide grips 126L and 126R can be changed in the direction of the axis A1 of the torsion shaft 253.

[0104] In order to improve the operability when the operator holds the slide grips 126L and 126R, as shown in FIGS. 13(a) and 13(b), the grip axes A5L and A5R (not shown) of the slide grips during operation are preferably orthogonal or substantially orthogonal to the axis A1 of the torsion shaft 253. However, it is not limited to this, and it may have an angle of substantially orthogonal or more, for example, an angle of 5 degrees or more, in the upward or downward direction. Also, the angles of the grip axes A5L and A5R of the slide grips with respect to the gravitational direction during operation can be appropriately adjusted by changing the connection angles between the slide grips 126L and 126R and the slide grip connection parts 127L and 127R, respectively.

[0105] In the reinforcing bar tying machine 1C, the operation for changing the grip height performed by the operator will be described. When changing the grip height from the states shown in FIGS. 12(a) and 13(a) to the states shown in FIGS. 12(b) and 13(b), the operator first operates the slide lock release switch to release the lock. Next, the operator grips the slide grips 126L and 126R and pushes them upward, so that the slide grip attachment portion 138 to which the slide handle portions 128L and 128R are attached slides upward in the direction of the axis A2 of the connecting portion 300 by the slide groove having a slide mechanism. When the slide is executed to a predetermined position, the slide lock mechanism of the slide grip attachment portion 138 operates, and the slide of the slide grip attachment portion 138 is locked. This state is the state shown in FIGS. 12(b) and 13(b), and the operator can start the operation of the reinforcing bar tying machine 1C by gripping the slide grips 126L and 126R that have moved to a position higher than before the change. The operation for changing the grip height in the reverse direction is the same as the operation described above.

[0106] In the above description, the case where the heights H of the pair of grips are the same has been described. In the reinforcing bar tying machine 1C, the height in the direction of the axis A1 of the twisting shaft 243 can be individually changed between one grip and the other grip when the operator grips and operates the pair of grips. That is, the slide handle portions 128L and 128R can slide either simultaneously or individually. When sliding them individually, an attachment portion for attaching the slide handle portions 128L and 128R separately, and a slide mechanism, a slide lock mechanism, and a slide lock release switch corresponding to those attachment portions may be provided. Further, a switching mechanism and a switching operation switch for switching between the case where the slide handle portions 128L and 128R slide simultaneously and the case where they slide individually may be further provided in the slide handle portions 128L and 128R.

[0107] In the above description, an example of adjusting the grip height of the rebar tying machine 1C in two steps has been described, but it is also possible to set the grip height in three or more steps. In that case, the slide grip attachment portion 138 may be provided with a slide lock mechanism that sets three or more slide positions.

[0108] [Effects of the Third Embodiment] As described above, according to the rebar tying machine 1C of the third embodiment, it is possible to change the left and right grip heights in the direction of the axis A1 of the twisting shaft 253 according to the operating environment, the height of the operator, the difference in the dominant arm, and the difference in preferences. In this way, in order to change the grip height, without extending the connecting portion 300C, the grip itself is moved, so that the wiring process inside the connecting portion 300C does not become complicated, and the electrical efficiency does not deteriorate due to the extension of the wire length.

[0109] Further, the rebar tying machine 1C of the third embodiment may have a structure including a slide grip attachment portion 138, slide handle portions 128L and 128R, a slide groove 330, etc. in the connecting portion 300C. The configurations of the first main body portion 100 and the second main body portion 200 can utilize the basic configuration of an existing tying machine. Further, by further having the wiring detour portion 320, compared with the case of adjusting the overall length of the tying machine by replacing the connecting portion 300C, the wiring of the connecting portion 300C does not become complicated, and a rebar tying machine with better power efficiency than the prior art can be obtained.

[0110] Further, since the grip height of the rebar tying machine 1C of the third embodiment can be changed by sliding the slide handle portions 128L and R, the working time required to change the grip height can be shortened compared to the rebar tying machine 1A of the first embodiment.

[0111] [Fourth Embodiment] FIG. 14 is a side view showing the internal configuration of the reinforcing bar tying machine 1D according to the fourth embodiment. The reinforcing bar tying machine 1D according to the fourth embodiment differs in configuration from the reinforcing bar tying machine 1A according to the first embodiment in that the contact member 233 is not provided. Since the reinforcing bar tying machine 1B does not include the contact member 233, the curl guide 230B does not open or close even when the reinforcing bar S is inserted into or removed from the opening 260. Note that the reinforcing bar tying machine 1B has the same configuration as the reinforcing bar tying machine 1B except that the contact member 233 is not provided.

[0112] <Fifth Embodiment> In the reinforcing bar tying machine 1E according to the fifth embodiment, the configuration of the first main body 100E is particularly different from the configuration of the first main body 100 of the reinforcing bar tying machine 1A according to the first embodiment. Therefore, hereinafter, in the reinforcing bar tying machine 1E of the fifth embodiment, the same reference numerals are given to the components that are substantially common to the reinforcing bar tying machine 1A of the first embodiment described with reference to FIGS. 1 to 9, and the different components will be described in detail.

[0113] [Configuration Example of Reinforcing Bar Tying Machine 1E] FIG. 15 is a side view showing the external configuration of the reinforcing bar tying machine 1E according to the fifth embodiment, and FIG. 16 is a front view showing the external configuration of the reinforcing bar tying machine 1E.

[0114] The reinforcing bar tying machine 1E includes a first main body 100E, a curl guide 230A that has an opening into which an object to be tied can be inserted and curls the wire W along the periphery of the object to be tied inserted into the opening, a twisting portion 250 (see FIG. 1) that twists the wire curled by the curl guide 230A, and a connecting portion 300 that connects the first main body 100E and the second main body 200.

[0115] The first main body portion 100E includes a pair of handle portions 150R and 150L, a grip attachment portion 153 that enables the positions of the handle portions 150R and 150L to be changed in the direction in which the axis A1 of the twisting shaft extends, a first housing 102 that supports the upper end side of the long connecting portion 300, and a battery mounting portion 140 to which a battery 142 serving as a power source is detachably attached. Since the handle portions 150R and 150L have a symmetric configuration, the description of one side may be simplified or omitted in some cases.

[0116] FIG. 17, FIGS. 18(a), 18(b), 19, and 20 are perspective views of the first main body portion 100E in the reinforcing bar bundling machine 1E according to the fifth embodiment.

[0117] The left handle portion 150L has a grip 151L that a user grips and a grip connecting portion 152L that is connected to the grip 151L. The grip 151L is formed of a closed annular body. An elongated columnar portion 151La that is easy for a user to grip is provided on the grip 151L, but it is also possible to perform work by gripping other portions other than the portion 151La. The portion 151La of the grip 151L may be formed of a prism.

[0118] Similarly, the right handle portion 150R has a grip 151R that a user grips and a grip connecting portion 152R that is connected to the grip 151R. The grip 151R is formed of a closed annular body. An elongated columnar portion 151Ra that is easy for a user to grip is provided on the grip 151R, but it is also possible to perform work by gripping other portions other than the portion 151Ra. The portion 151Ra of the grip 151R may be formed of a prism.

[0119] The grip attachment portion 153 has a grip attachment member 153a and a cover 153b. The grip attachment member 153a is provided on the first housing 102 and has a plurality of grooves (to be described later) that enable the variable positioning of the attachment positions of the grip connection portions 152R and 152L. The cover 153b is rotatably attached to a fulcrum shaft 155 provided at the upper end on the front side of the grip attachment member 153a, and opens and closes the front side of the grip attachment member 153a.

[0120] The grip attachment member 153a is provided with a right first groove 157R, a left first groove 157L, a right second groove 158R, a left second groove 158L, a right third groove 159R, and a left third groove 159L. The right first groove 157R, the right second groove 158R, and the right third groove 159R, and the left first groove 157L, the left second groove 158L, and the left third groove 159L are arranged symmetrically with respect to the direction in which the axis A1 of the torsion shaft extends, and extend radially from the approximate center of the grip attachment member 153a. The plurality of grooves such as the right first groove 157R are formed in a substantially square groove cross-sectional shape into which the grip connection portion 152R etc. can be fitted. Note that the shape of the groove only needs to be a shape into which the grip connection portion 152R can be fitted, and may be, for example, a circular groove shape.

[0121] The right first groove 157R extends obliquely upward to the right from the approximate center of the grip attachment member 153a, and the left first groove 157L extends obliquely upward to the left from the approximate center of the grip attachment member 153a. The right second groove 158R extends obliquely downward to the right from the approximate center of the grip attachment member 153a, and the left second groove 158L extends obliquely downward to the left from the approximate center of the grip attachment member 153a. The right third groove 159R extends downward from the approximate center of the grip attachment member 153a, and the left third groove 159L extends downward from the approximate center of the grip attachment member 153a.

[0122] As shown in FIG. 18(b), a two-axis hinge 160L is provided at the end of the grip connecting portion 152L on the side opposite to the grip 151L. The two-axis hinge 160L includes a first axis 160La and a second axis 160Lb. The first axis 160La is configured to be insertable into and removable from a hole 161L formed in the grip attachment member 153a, and rotates about the axial direction of the hole 161L as the axis center. The second axis 160Lb is attached to the first axis 160La via a support member 160Lc, and rotates about the direction orthogonal to the first axis 160La as the axis center.

[0123] Similarly, a two-axis hinge 160R is provided at the end of the grip connecting portion 152R on the side opposite to the grip 151R. The two-axis hinge 160R includes a first axis 160Ra and a second axis 160Rb. The first axis 160Ra is configured to be insertable into and removable from a hole 161R formed in the grip attachment member 153a, and rotates about the axial direction of the hole 161R as the axis center. The second axis 160Rb is attached to the first axis 160Ra via a support member 160Rc, and rotates about the direction orthogonal to the first axis 160Ra as the axis center.

[0124] In addition, in the fifth embodiment, similar to the first embodiment, the grip height H in the state where the grip connecting portion 152R is fixed to the right first groove 157R, the right second groove 158R, and the right third groove 159R is set to heights HR2, HR3, and HR4, respectively. Also, the grip height H in the state where the grip connecting portion 152L is fixed to the left first groove 157L, the left second groove 158L, and the left third groove 159L is set to HL2, HL3, and HL4.

[0125] [Operation Example of Rebar Bundling Machine 1E] Next, an example of the operation of the rebar bundling machine 1E when changing the grip height H from the height HL2 to the height HL3 will be described with reference to FIGS. 17 to 20.

[0126] As shown in FIG. 17, when the handle portions 150R and 150L are at the height HL2, the grip connecting portion 152R is fixed to the right first groove 157R, and the grip connecting portion 152L is fixed to the left first groove 157L.

[0127] First, as shown in Fig. 18(a), the user removes the left and right lock parts 156R and 156L from the attachment parts 154R and 154L of the cover 153b, opens the cover 153b with respect to the grip attachment member 153a, and exposes the front side of the grip attachment member 153a.

[0128] Next, as shown in Fig. 19, the user grips the grip 151L of the handle part 150L and rotates the grip connection part 152L about an axis perpendicular to the first axis 160Ra via the second axis 160Lb, so that the grip connection part 152L is raised with respect to the grip attachment member 153a. Subsequently, the user rotates the grip 151L from the left first groove 157L side to the left second groove 158L side with the first axis 160La as a fulcrum, and moves the grip connection part 152L to a position where it can be fitted into the left second groove 158L.

[0129] Next, as shown in Fig. 20, while gripping the grip 151L, the user rotates the grip 151L in a direction approaching the grip attachment member 153a about an axis perpendicular to the first axis 160Ra with the first axis 160La as a fulcrum, thereby fitting the grip connection part 152L into the left second groove 158L.

[0130] The user also performs the same operations as those of the handle part 150L described above on the handle part 150R, and fits the grip connection part 152R of the handle part 150R into the right second groove 158R. Note that any of the above-described various operations may be performed first on the left and right handle parts 150R and 150L.

[0131] Finally, the cover 153b is closed, and the lock parts 156R and 156L are attached to the attachment parts 154R and 154L of the grip attachment member 153a, thereby locking the cover 153b with respect to the grip attachment member 153a. In this way, the grip height H of the handle parts 150R and 150L can be changed.

[0132] As described above, according to the fifth embodiment, similar to the first embodiment, the left and right grip heights H can be changed in the direction in which the axis A1 of the torsion axis extends according to the operating environment, the height of the operator, the difference in the dominant arm, and the difference in preferences. Further, since the grips 151R and 151L are formed of an annular body, even when the wire bundling machine 1E is placed on the reinforcing bar during work on the reinforcing bar, it is possible to prevent the grips 151R and 151L from slipping under the reinforcing bar and getting caught. Thereby, the work can be speeded up and the efficiency can be improved.

[0133] <Sixth Embodiment> In the wire bundling machine 1F according to the sixth embodiment, particularly, the configuration of the first main body portion 100F is different from the configuration of the first main body portion 100 of the wire bundling machine 1A according to the first embodiment. Therefore, hereinafter, in the wire bundling machine 1F of the sixth embodiment, the components that are substantially common to the wire bundling machine 1A of the first embodiment described with reference to FIGS. 1 to 9 are denoted by the same reference numerals, and the different components will be described in detail.

[0134] [Configuration Example of Wire Bundling Machine 1F] FIG. 21 is a perspective view of the first main body portion 100F in the wire bundling machine 1F according to the sixth embodiment. FIG. 22(a) is a side view showing the internal configuration of the first main body portion 100F according to the sixth embodiment, and FIG. 22(b) is an enlarged view of the main part of the first main body portion 100F.

[0135] The first main body portion 100F constituting the wire bundling machine 1F includes a pair of handle portions 162R and 162L, grip attachment portions 165R and 165L that can change the positions of the handle portions 162R and 162L in the direction in which the axis A1 of the torsion axis extends, dials 170R and 170L that are operated when adjusting the grip height H, and a first housing 102 that supports the upper end side of the long connecting portion 300. Note that, since the handle portions 162R and 162L and the grip attachment portions 165R and 165L have a symmetric configuration, the description of one side may be simplified or omitted.

[0136] The left handle part 162L has a grip 163L that the user holds and a grip connection part 164L connected to the grip 163L. The grip 163L is formed of a closed annular body. The grip 163L is provided with a dial attachment part 163La for attaching a dial 170L described later. As shown in FIGS. 22(a) and 22(b), the grip connection part 164L has a pair of support parts 164La protruding from the grip 163L to the grip attachment part 165L and a mounting shaft 164Lb attached inside the pair of support parts 164La. The mounting shaft 164Lb is inserted into a mounting hole 165La that penetrates the grip attachment part 165L in the front-rear direction.

[0137] The grip attachment part 165L is formed of, for example, a cylindrical body. A plurality of left first openings 167L, left second openings 168L, and left third openings 169L are formed at predetermined intervals on the circumferential surface of the grip attachment part 165L. The left first opening 167L is formed on the circumferential surface of the grip attachment part 165L at the upper left diagonal, the left second opening 168L is formed on the circumferential surface of the grip attachment part 165L at the lower left diagonal, and the left third opening 169L is formed on the circumferential surface of the grip attachment part 165L at the bottom.

[0138] In the sixth embodiment, similar to the first embodiment, the grip heights H in the state where the handle part 162L is fixed to the left first opening 167L, the left second opening 168L, and the left third opening 169L are set as heights HL2, HL3, and HL4, respectively.

[0139] As shown in FIG. 22(b), a nut 173L is embedded at a position substantially the same as the left third opening 169L formed in the grip attachment part 165L, and the hole of the nut 173L communicates with the left third opening 169L. Although not shown, nuts are also embedded at the same positions as the other left first opening 167L and left second opening 168L of the grip attachment part 165L.

[0140] The dial 170L is attached to the surface of the grip 163L side of the dial mounting portion 163La. The base end portion 171La of the pin 171L is attached to the dial 170L. The tip end portion 171Lb of this pin 171L is inserted into the left third opening 169L of the grip mounting portion 165L through the through hole 163Lb formed in the dial mounting portion 163La, and is configured to be fastened to the nut 173L disposed on the back side thereof. The pin 171L is biased toward the grip mounting portion 165L by the compression spring 172L disposed in the through hole 163Lb, and is pushed into the left third opening 169L of the grip mounting portion 165L when the dial 170L is not pulled.

[0141] [Operation example of the reinforcing bar bundling machine 1F] Next, an example of the operation of the reinforcing bar bundling machine 1F when changing the grip height H from the height HL4 to the height HL3 will be described with reference to FIGS. 21, 22(a) and 22(b).

[0142] As shown in FIG. 21 and the like, first, the user turns the dial 170L in the direction in which the pin 171L is loosened. Along with this, the compression spring 172L is compressed by the operation amount of the dial 170L, and the tip end portion 171Lb of the pin 171L comes off from the nut 173L. Subsequently, the dial 170L is pulled outward. As a result, the compression spring 172L is further compressed, and the tip end portion 171Lb of the pin 171L comes out of the left third opening 169L of the grip mounting portion 165L.

[0143] Subsequently, while the user is pulling the dial 170L, the user rotates the handle portion 162L upward by a predetermined angle. When the tip end portion 171Lb of the pin 171L is displaced from the left third opening 169L, the user releases the dial 170L and continues to rotate the handle portion 162L upward.

[0144] When the tip 171Lb of the pin 171L moves to the left second opening 168L of the grip attachment part 165L, the compression spring 172L extends, and the tip 171Lb of the pin 171L is inserted into the left second opening 168L of the grip attachment part 165L. The user rotates the dial 170L in the direction in which the pin 171L tightens, thereby fastening the tip 171Lb of the pin 171L to the nut 173L and fixing the handle part 162L at the height HL3. In this way, the height of the handle part 162L can be varied from the height HL4 to the height HL3.

[0145] Regarding the right handle part 162R as well, the height of the handle part 162R can be varied from the height HL4 to the height HL3 by the same operation as that of the left handle part 162L described above.

[0146] As described above, according to the sixth embodiment, similar to the first embodiment, the left and right grip heights H can be changed in the direction in which the axis A1 of the torsion axis extends according to the operating environment, the height of the operator, the difference in the dominant hand, and the difference in preferences. Further, since the grips 163R and 163L are configured as annular bodies, even when the wire bundling machine 1F is placed on the reinforcing bar during work on the reinforcing bar, it is possible to prevent the grips 163R and 163L from slipping under the reinforcing bar and getting caught. Thereby, the work can be speeded up and the efficiency can be improved.

[0147] <Seventh Embodiment> In the wire bundling machine 1G according to the seventh embodiment, particularly, the configuration of the first main body part 100G is different from the configuration of the first main body part 100 of the wire bundling machine 1A according to the first embodiment. Therefore, hereinafter, in the wire bundling machine 1G of the seventh embodiment, the same reference numerals are given to the components that are substantially common to the wire bundling machine 1G of the first embodiment described with reference to FIGS. 1 to 9, and the different components will be described in detail.

[0148] [Configuration Example of Wire Bundling Machine 1G] FIG. 23 is a perspective view of the first main body portion 100G of the reinforcing bar bundling machine 1G according to the seventh embodiment. FIG. 24 is a cross-sectional view of the grip attachment portion 177L according to the seventh embodiment.

[0149] The first main body portion 100G constituting the reinforcing bar bundling machine 1G includes a pair of handle portions 174R and 174L, grip attachment portions 177R and 177L that can change the positions of the handle portions 174R and 174L in the direction in which the axis A1 of the twisting shaft extends, and a first housing 102 that supports the upper end side of the long connecting portion 300. Since the handle portions 174R and 174L have a symmetric configuration, the description of one side may be simplified.

[0150] The left handle portion 174L has a grip 175L that a user grips and a grip connecting portion 176L that is connected to the grip 175L. The grip 175L is composed of an elongated cylindrical body that is easy for the user to grip. As shown in FIG. 24, the grip connecting portion 176L includes a pair of support portions 176La that support the grip 175L and a fulcrum shaft 176Lb that is attached to the support portion 176La. The pair of support portions 176La are composed of substantially linear members, and each of the outer ends is attached to both ends of the grip 175L. The fulcrum shaft 176Lb is inserted into the attachment recess 179La of the grip attachment member 179L described later, and each of its ends is attached to the inner ends of the pair of support portions 176La. In the seventh embodiment, the handle portion 174L is configured as a closed annular body by the grip 175L, the support portion 176La, and the fulcrum shaft 176Lb.

[0151] Similarly, the right handle portion 174R also has a grip 175R and a grip connecting portion 176R. The grip connecting portion 176R includes a support portion 176Ra and a fulcrum shaft 176Rb. In the seventh embodiment, the handle portion 174R is configured as a closed annular body by the grip 175R, the support portion 176Ra, and a fulcrum shaft (not shown).

[0152] On the circumferential surface of the fulcrum shaft 176L that constitutes the grip connecting portion 176L, as shown in FIG. 24, a first recess 181L, a second recess 182L, a third recess 183L, and a fourth recess 184L for adjusting the grip height H of the handle portion 174L are formed. The first recess 181L, the second recess 182L, the third recess 183L, and the fourth recess 184L are configured to be fitted into a mounting recess 179La formed in the grip mounting portion 177L.

[0153] The grip mounting portion 177L includes a housing portion 178L, a grip mounting member 179L, and a button 180L. The housing portion 178L is configured to be dividable left and right, and the grip mounting member 179L is housed therein. The grip mounting member 179L has a mounting recess 179La into which the fulcrum shaft 176Lb is inserted, and rotatably supports the fulcrum shaft 176Lb via the mounting recess 179La. A convex portion 179Lb that protrudes toward the button 180L side and can be fitted into the first recess 181L etc. of the grip connecting portion 176L described later is formed in the mounting recess 179La. Further, the grip mounting member 179L is supported by a spring (not shown), and abuts against the inner surface of the button 180L in a state of being biased toward the button 180L side (left side) by this spring.

[0154] The button 180L is provided in contact with the left end face of the grip mounting member 179L and is pressed by the user when changing the grip height H of the handle portion 174L. When the button 180L is pressed, the convex portion 179Lb comes out of the first recess 181L etc., enabling the handle portion 174L to be rotated.

[0155] In the seventh embodiment, similar to the first embodiment, when the convex portion 179Lb of the grip mounting member 179L is fitted into the first recess 181L, the second recess 182L, the third recess 183L, and the fourth recess 184L of the fulcrum shaft 176Lb, the grip heights H of the handle portion 174L are set as heights HL1, HL2, HL3, and HL4, respectively. Also, since the grip height H of the right handle portion 174R can be defined in the same manner as the handle portion 174L, detailed description is omitted.

[0156] [Operation Example of Rebar Tying Machine 1G] Next, an example of the operation of the rebar tying machine 1G when changing the grip height H from the height HL2 to the height HL3 will be described with reference to FIGS. 23 and 24.

[0157] As shown in FIG. 23, when the handle portion 174L is at the height HL2, the convex portion 179Lb of the grip attachment member 179L is fitted into the second recess 182L of the fulcrum shaft 176Lb, and the handle portion 174L is fixed at the height HL2.

[0158] When the button 180L is pressed by the user, the button 180L is pushed toward the grip attachment member 179L (inside). Along with this, the grip attachment member 179L also moves inward against the biasing force of a spring (not shown), and the convex portion 179Lb of the grip attachment member 179L comes out of the second recess 182L, thereby releasing the fitting state between the convex portion 179Lb and the second recess 182L. As a result, the handle portion 174L becomes rotatable (movable).

[0159] Subsequently, when the button 180L is released while the handle portion 174L is rotated clockwise (downward), the circumferential surface other than the recess of the fulcrum shaft 176Lb rotates while contacting the convex portion 179Lb.

[0160] As the handle portion 174L rotates clockwise, the convex portion 179Lb of the grip attachment member 179L is fitted into the third recess 183L of the fulcrum shaft 176Lb by the biasing of a spring (not shown), and the handle portion 174L is fixed at the height HL3. In this way, the grip height H of the handle portion 174L can be changed from the height HL2 to the height HL3. Note that for the right handle portion 174R, the grip height H can also be changed from the height HL2 to the height HL3 by the same operation as the operation of the left handle portion 174L described above.

[0161] As described above, according to the seventh embodiment, similar to the first embodiment, the left and right grip heights H can be changed in the direction in which the axis A1 of the torsion axis extends according to the operating environment, the height of the operator, the difference in the dominant arm, and the difference in preferences. Further, since the handle portions 174R and 174L are configured as annular bodies, even when the rebar tying machine 1G is placed on the rebar during work on the rebar, it is possible to prevent the handle portions 174R and 174L from getting caught under the rebar. Thereby, the work can be speeded up and the efficiency can be improved.

[0162] <Eighth Embodiment> In the rebar tying machine 1H according to the eighth embodiment, in particular, the configuration of the first main body portion 100H is different from the configuration of the first main body portion 100 and the like of the rebar tying machine 1A according to the first embodiment. Therefore, hereinafter, in the rebar tying machine 1H of the eighth embodiment, the same reference numerals are given to the components that are substantially common to the rebar tying machine 1A of the first embodiment described with reference to FIGS. 1 to 9, and the different components will be described in detail.

[0163] [Configuration Example of Rebar Tying Machine 1H] FIGS. 25, 26, and 27 are perspective views of the first main body portion 100H of the rebar tying machine 1H according to the eighth embodiment.

[0164] The first main body portion 100H constituting the rebar tying machine 1H includes a pair of handle portions 185R and 185L, a grip attachment portion 188 that enables the positions of the handle portions 185R and 185L to be changed in the direction in which the axis A1 of the torsion axis extends, and a first housing 102 that supports the upper end side of the long connecting portion 300. Since the handle portions 185R and 185L have a symmetric configuration, the description of one side may be simplified.

[0165] The left handle part 185L has a grip 186L for the user to hold and a grip connecting part 187L connected to the grip 186L. The grip 186L is formed as a closed annular body. One end of the grip connecting part 187L is attached to the grip 186L, and a pin hole 187Lc for mounting the left first guide pin 194L is formed near this attachment site. A fulcrum shaft 187Lb is attached to the other end of the grip connecting part 187L. The fulcrum shaft 187Lb is configured to be insertable into and removable from a hole 197L formed at the intersection of the left first groove 191L, the left second groove 192L, and the left third groove 193L.

[0166] Similarly, the right handle part 185R has a grip 186R for the user to hold and a grip connecting part 187R connected to the grip 186R. The grip 186R is formed as a closed annular body. One end of the grip connecting part 187R is attached to the grip 186R, and a pin hole 187Rc for mounting the right first guide pin 194R is formed near this attachment site. A fulcrum shaft 187Rb is attached to the other end of the grip connecting part 187R. The fulcrum shaft 187Rb is configured to be insertable into and removable from a hole 197R formed at the intersection of the right first groove 191R, the right second groove 192R, and the right third groove 193R.

[0167] The grip attachment part 188 has a grip attachment member 188a and a cover 188b. The grip attachment member 188a is provided on the first housing 102 and has a plurality of grooves described later that enable the attachment positions of the handle parts 185R and 185L to be variable. The cover 188b is rotatably attached to a fulcrum shaft provided on the grip attachment member 188a and opens and closes the front side of the grip attachment member 188a.

[0168] On the front side of the grip attachment member 188a, a right first groove 191R, a left first groove 191L, a right second groove 192R, a left second groove 192L, a right third groove 193R, and a left third groove 193L are provided. The right first groove 191R, the right second groove 192R, and the right third groove 193R, and the left first groove 191L, the left second groove 192L, and the left third groove 193L are arranged symmetrically with respect to the direction in which the axis A1 of the torsion shaft extends, and extend radially from the approximate center of the grip attachment member 188a. The plurality of right first grooves 191R etc. are formed in a substantially angular groove shape in cross section into which the grip connection part 187R etc. can be fitted.

[0169] More specifically, the right first groove 191R extends obliquely upward to the right from the approximate center of the grip attachment member 188a, and the left first groove 191L extends obliquely upward to the left from the approximate center of the grip attachment member 188a. The right second groove 192R extends obliquely downward to the right from the approximate center of the grip attachment member 188a, and the left second groove 192L extends obliquely downward to the left from the approximate center of the grip attachment member 188a. The right third groove 193R extends downward from the approximate center of the grip attachment member 188a, and the left third groove 193L extends downward from the approximate center of the grip attachment member 188a.

[0170] At the left outer end of the left first groove 191L, a left first guide pin 194L into which the pin hole 187Lc of the grip connection part 187L is inserted when fixing the grip height H of the handle part 185L is provided. At the left outer end of the left second groove 192L, a left second guide pin 195L into which the pin hole 187Lc of the grip connection part 187L is inserted when fixing the grip height H of the handle part 185L is provided.

[0171] At the right outer end of the right first groove 191R, a right first guide pin 194R into which the pin hole 187Rc of the grip connection part 187R is inserted when fixing the grip height H of the handle part 185R is provided. At the right outer end of the right second groove 192R, a right second guide pin 195R into which the pin hole 187Rc of the grip connection part 187R is inserted when fixing the grip height H of the handle part 185R is provided.

[0172] In the eighth embodiment, similar to the first embodiment, the grip heights H in the states where the grip connecting portions 187R are fixed to the right first groove 191R, the right second groove 192R, and the right third groove 193R are set to heights HR2, HR3, and HR4, respectively. Also, the grip heights H in the states where the grip connecting portions 187L are fixed to the left first groove 191L, the left second groove 192L, and the left third groove 193L are set to heights HL2, HL3, and HL4, respectively.

[0173] [Operation Example of Rebar Bundling Machine 1H] Next, an example of the operation of the rebar bundling machine 1H when changing the grip height H from the height HL2 to the height HL3 will be described with reference to FIGS. 25 to 27.

[0174] As shown in FIG. 25, when the handle portion 185L is at the height HL2, the grip connecting portion 187R is fixed to the right first groove 191R, the grip connecting portion 187L is fixed to the left first groove 191L, and the grip height H is fixed to the height HL2.

[0175] First, the user releases the lock function of the grip attachment portion 188, opens the cover 188b with respect to the grip attachment member 188a, and exposes the front side of the grip attachment member 188a. Note that, as the lock mechanism, a lock mechanism similar to that shown in FIG. 17 or the like can be adopted.

[0176] Next, as shown in FIGS. 25 and 26, the user grips the grip 186L, pulls out the fulcrum shaft 187Lb of the grip connecting portion 187L from the hole 197L, and removes the left first guide pin 194L from the pin hole 187Lc of the grip connecting portion 187L. Subsequently, the grip connecting portion 187L is pulled out from the left first groove 191L to the front side, and the handle portion 185L is removed from the grip attachment member 188a.

[0177] Next, as shown in FIG. 27, align the grip connecting portion 187L with the left second groove 192L, insert the fulcrum shaft 187Lb of the grip connecting portion 187L into the hole 197L, and insert the left second guide pin 195L into the pin hole 187Lc of the grip connecting portion 187L.

[0178] The user also performs the same operations on the right handle portion 185R as on the handle portion 185L. Note that any of the above-described various operations may be performed first on the left and right handle portions 185R and 185L.

[0179] Finally, the user closes the cover 188b and locks the cover 188b to the grip attachment member 188a.

[0180] As described above, according to the eighth embodiment, similar to the first embodiment, the left and right grip heights H can be changed in the direction in which the axis A1 of the torsion shaft extends according to the operating environment, the height of the operator, the difference in the dominant arm, and the difference in preferences. Further, since the grips 186R and 186L are formed of an annular body, even when the rebar tying machine 1H is placed on the rebar during work on the rebar, it is possible to prevent the grips 186R and 186L from slipping under the rebar and getting caught. Thereby, the work can be speeded up and the efficiency can be improved.

Explanation of Signs

[0181] 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H Rebar tying machine (tying machine) 100, 100B, 100C, 100E, 100F, 100G, 100H First main body portion 102 First housing 120L, 120R, 151L, 151R, 163L, 163R, 175L, 175R, 186L, 186R Grips 121L, 121R Grip connecting portions 122L, 122R, 150L, 150R, 162L, 162R, 174L, 174R, 185L, 185R Handle portions 123L1, 123R1 First grip portions 123L2 and 123R2, the second grip part 124L and 124R, the rotating grip connecting part 125L and 125R, the rotating handle part 126L and 126R, the slide grip 127L and 127R, the slide grip connecting part 128L and 128R, the slide handle part 130, the grip mounting part 137, the rotating grip mounting part 138, the slide grip mounting part 140, the battery mounting part 142, the battery 160L and 160R, the two-axis hinge 200, the second main body part 202, the second housing 220, the wire feeding part 230A and 230B, the curl guide 231A and 231B, the first guide part 232A and 232B, the second guide part 233, the contact member 234, the abutting part 250, the twisting part 253, the twisting shaft 300 and 300C, the connecting part 320, the wiring detour part 330, the slide groove A1, the axis of the twisting shaft A2, the axis of the connecting part S, the steel bar (object to be bundled) W, the wire F, the reinforcement surface

Claims

1. A first main body portion, a curling guide having an opening into which an object to be tied can be inserted, and curling a wire along the periphery of the object to be tied inserted into the opening; and a second main body portion having a twisting portion including a twisting shaft for twisting the curled wire, a connecting portion connecting the first main body portion and the second main body portion, and comprising: The first main body portion is symmetrically arranged with reference to the axis of the connecting portion or the extension line of the axis, and includes a handle portion having a pair of grips that can be gripped by an operator. The handle portion has a grip connecting portion connecting the grip and the first main body portion, The grip is formed of a closed annular body, and when the axial direction of the twisting shaft is the vertical direction, the plane formed by the annular body extends obliquely upward or obliquely downward on both sides of the axis of the connecting portion or the extension line of the axis. A tying machine.

2. The grip includes a portion that can be gripped by an operator, The portion is cylindrical or prismatic, and the axis of the cylindrical shape or the prism extends in a direction perpendicular to each of the axis of the twisting shaft and the width direction in which the pair of grips are arranged. The tying machine according to claim 1.

3. The handle portion has a grip mounting portion provided on a housing that supports the upper end side of the connecting portion, and extends radially from the center of the grip mounting portion. The tying machine according to claim 1.

4. The grip mounting portion has groove portions extending obliquely upward or obliquely downward on both sides of the axis of the connecting portion or the extension line of the axis, and the grip connecting portion is fitted into the groove portions. The tying machine according to claim 3.

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