Rebar tyng machine

Abstract

To provide a rebar tying machine that can secure the amount of movement of the contact member that is thrust against the rebar and moves.SOLUTION: A rebar tying machine 1A includes: a first guide 51A for guiding a wire; a second guide 52 for guiding a wire habitually wound by the first guide 51A; a first contact member 9AL (a second contact member 9AR) that is butted against a rebar and moves; and a link portion 96 that transmits the movement of the first contact member 9AL (the second contact member 9AR) to the second guide 52. The first contact member 9AL (the second contact member 9AR) has an action portion 92AL (92AR) that actuates the link portion 96, the link portion 96 having an action shaft 98A in contact with the second guide 52 and an opening 98B supporting the action shaft 98A.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a tying machine that ties an object to be tied, such as a reinforcing bar, with a wire.

Background Art

[0002] Conventionally, a tying machine called a reinforcing bar tying machine has been proposed, which winds a wire sent out from a wire feeding device in a loop around a reinforcing bar, grips and twists this wire with a twisting hook, and tightens and ties the reinforcing bar with the wire (see, for example, Patent Document 1).

[0003] The reinforcing bar tying machine described in Patent Document 1 is configured to be provided with a contact member that engages with a reinforcing bar during tying and is movable in the front-rear direction, and a switch that engages when the contact member moves backward to enable the operation of the tying machine.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the reinforcing bar tying machine described in Patent Document 1, if the movement amount of the contact member cannot be ensured, even if the contact member moves backward, it cannot engage with the switch, and the tying operation cannot be executed. However, in Patent Document 1, a configuration for ensuring the movement amount of the contact member was not considered.

[0006] The present disclosure has been made to solve such problems, and an object thereof is to provide a tying machine capable of ensuring the movement amount of a moving part (contact member) that abuts against an object to be tied and moves.

Means for Solving the Problems

[0007] To solve the above problems, the bundling machine according to the present disclosure includes a main body portion, a moving portion that abuts against an object to be bundled and moves, a first guide and a second guide that extend from one end of the main body portion in a first direction and are arranged with a space for inserting the object to be bundled in a second direction orthogonal to the first direction to guide a wire for bundling the object to be bundled, and a guide moving portion that changes the space from a first distance to a second distance shorter than the first distance. The moving portion includes an acting portion that operates the guide moving portion, and the guide moving portion includes an acting shaft that contacts the first guide or the second guide and an opening that supports the acting shaft.

[0008] In this bundling machine, in the operation of inserting the object to be bundled between the first guide and the second guide, the moving portion is pushed by the object to be bundled due to the relative movement between the bundling machine and the object to be bundled, and the moving portion moves. When the moving portion abutted against the object to be bundled moves to a predetermined position, the guide moving portion operates, so that the space between the first guide and the second guide changes from the first distance to a second distance shorter than the first distance, and the operation of bundling the object to be bundled is executed.

Advantages of the Invention

[0009] In the bundling machine according to the present disclosure, by providing a guide moving portion that transmits the movement of the moving portion and changes the space between the first guide and the second guide from the first distance to a second distance shorter than the first distance, the space between the first guide and the second guide can be changed from the first distance to the second distance in conjunction with the moving portion, and the movement amount of the moving portion that abuts against the object to be bundled and moves can be set as a predetermined range, so that the operation of bundling the object to be bundled can be executed.

Brief Description of the Drawings

[0010]

Figure 1A

Figure 1B

Figure 1C

Figure 1D

Figure 2

Figure 3A

Figure 3B

Figure 4

Figure 5A

Figure 5B

Figure 6A

Figure 6B

Figure 7

Figure 8

Figure 9A

Figure 9B

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15A

Figure 15B

Figure 16

Figure 17A

Figure 17B

Figure 18

Figure 19A

Figure 19B

Figure 20

Figure 21

Figure 22

Embodiments for Carrying Out the Invention

[0011] 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.

[0012] <Example of the steel bar tying machine according to the first embodiment> Figures 1A, 1B, 1C, and 1D are side views showing an example of the overall configuration of a steel bar tying machine according to the first embodiment. Figure 2 is a top view showing an example of the overall configuration of the steel bar tying machine according to the first embodiment. Figure 3A is a front view showing an example of the overall configuration of the steel bar tying machine according to the first embodiment. Figure 3B is a rear view showing an example of the overall configuration of the steel bar tying machine according to the first embodiment. Further, Figure 4 is a side view showing an example of the internal configuration of the steel bar tying machine according to the first embodiment. Figures 5A and 5B are side views showing the main part of the internal configuration of the steel bar tying machine according to the first embodiment.

[0013] The steel bar tying machine 1A according to the first embodiment includes a first main body part 301 configured to be hand-held, a second main body part 302 having a mechanism for tying the steel bar S with the wire W, and an elongated connecting part 303 connecting the first main body part 301 and the second main body part 302. The first main body part 301 includes a pair of handle parts 304hL and 304hR that can be gripped by an operator. Further, the first main body part 301 includes a power switch 110 for performing operations of turning off and on the power of the steel bar tying machine 1A, and an operation part 111 having a dial or the like for adjusting the tying force.

[0014] The second main body part 302 is an example of a main body part, and its exterior is made of resin. The second main body part 302 includes a housing part 2 that rotatably houses a wire reel 20 around which the wire W is wound, and a feeding part 3 that feeds the wire W wound around the wire reel 20 housed in the housing part 2. Further, the second main body part 302 includes a regulating part 4 that gives a twist to the wire W fed by the feeding part 3, and a guiding part 5 that guides the wire W to which the twist is given by the regulating part 4. Furthermore, the second main body part 302 includes a cutting part 6 that cuts the wire W, a twisting part 7 that twists the wire W, and a driving part 8 that drives the cutting part 6, the twisting part 7, etc.

[0015] The steel bar tying machine 1A has a guide portion 5 provided on one side of the second main body portion 302. The steel bar tying machine 1A has a first main body portion 301 and a second main body portion 302 connected by a connecting portion 303, and thus, compared with a steel bar tying machine without the connecting portion 303, the space between the guide portion 5 and the handle portions 304hL and 304hR is in an extended form. In the present embodiment, the side where the guide portion 5 is provided is defined as the front.

[0016] The accommodating portion 2 is configured to be capable of attaching and detaching and supporting the wire reel 20. The feeding portion 3 includes a pair of feeding gears 30 as feeding members. The feeding portion 3 feeds the wire W by rotating the feeding gears 30 with a motor (not shown) while the wire W is clamped between the pair of feeding gears 30. The feeding portion 3 can feed the wire W in both the forward direction indicated by the arrow F and the reverse direction indicated by the arrow R according to the rotation direction of the feeding gears 30.

[0017] The cutting portion 6 is provided on the downstream side of the feeding portion 3 with respect to the forward feeding of the wire W indicated by the arrow F. The cutting portion 6 includes a fixed blade portion 60 and a movable blade portion 61 that cooperates with the fixed blade portion 60 to cut the wire W. Further, the cutting portion 6 includes a transmission mechanism 62 that transmits the movement of the driving portion 8 to the movable blade portion 61.

[0018] The fixed blade portion 60 has an opening 60a through which the wire W passes. The movable blade portion 61 cuts the wire W passing through the opening 60a of the fixed blade portion 60 by a rotational movement with the fixed blade portion 60 as a fulcrum.

[0019] The restricting portion 4 includes first to third restricting members that contact the wire W at a plurality of locations along the feeding direction of the wire W fed by the feeding portion 3, in this example, at least three locations, so as to impart a winding habit to the wire W along the feeding path Wf of the wire W shown by the broken line in FIG. 5B.

[0020] The restricting part 4 is composed of the first restricting member formed by the above-described fixed blade part 60. Further, the restricting part 4 includes a restricting member 42 as the second restricting member on the downstream side of the fixed blade part 60 with respect to the forward feed of the wire W indicated by the arrow F, and includes a restricting member 43 as the third restricting member on the downstream side of the restricting member 42. The restricting member 42 and the restricting member 43 are composed of columnar members, and the wire W contacts the outer peripheral surface.

[0021] The restricting part 4 is arranged such that the fixed blade part 60, the restricting member 42, and the restricting member 43 are on a curve in accordance with the feed path Wf of the wire W which is substantially annular and draws a helix. An opening 60a through which the wire W passes is provided on the feed path Wf of the wire W in the fixed blade part 60. Further, the restricting member 42 is provided on the inner side in the radial direction with respect to the feed path Wf of the wire W. Furthermore, the restricting member 43 is provided on the outer side in the radial direction with respect to the feed path Wf of the wire W.

[0022] Thereby, as the wire W fed by the feeding part 3 passes while contacting the fixed blade part 60, the restricting member 42, and the restricting member 43, a curl is imparted to the wire W along the feed path Wf of the wire W.

[0023] The restricting part 4 includes a transmission mechanism 44 that transmits the movement of the driving part 8 to the restricting member 42. The restricting member 42 is configured to be movable to a position where it contacts the wire W during the operation of feeding the wire W in the forward direction by the feeding part 3 and imparting a curl to the wire W, and to a position where it does not contact the wire W during the operation of feeding the wire W in the reverse direction and winding the wire W around the reinforcing bar S.

[0024] The guide part 5A includes a first guide 51A that guides the wire W, a second guide 52 that guides the wire W with a curl imparted by the restricting part 4 and the first guide 51A to the twisting part 7, and a third guide 55 that restricts the position in the radial direction with respect to the feed path Wf of the wire W.

[0025] The first guide 51A is attached to the front end of the second main body 302 and extends in a first direction which is the front-rear direction indicated by arrow A1. As shown in FIGS. 5A and 5B, the first guide 51A includes a groove portion 51h having a guide surface 51g with which the wire W fed by the feeding unit 3 makes sliding contact.

[0026] In the first guide 51A, when the side attached to the second main body 302 is the base end side and the side extending from the second main body 302 in the first direction is the tip end side, the base end side is attached to the second main body 302 by screws or the like.

[0027] The first guide 51A is provided with a regulating member 42 on the base end side and a regulating member 43 on the tip end side. A gap through which the wire W can pass is formed between the guide surface 51g and the outer peripheral surface of the regulating member 42. Further, a part of the outer peripheral surface of the regulating member 43 protrudes from the guide surface 51g.

[0028] The second guide 52 is attached to the front end of the second main body 302. The second guide 52 is provided opposite to the first guide 51A in a second direction indicated by arrow A2 which is the vertical direction orthogonal to the first direction. A predetermined interval is provided between the first guide 51A and the second guide 52 along the second direction, and an insertion / removal opening 53 through which the reinforcing bar S is inserted / removed is formed between the first guide 51A and the second guide 52.

[0029] The second guide 52 includes a pair of side guides 52a facing each other along a third direction indicated by arrow A3 which is the left-right direction orthogonal to the first direction and the second direction. In the second guide 52, when the side attached to the second main body 302 is the base end side and the side extending from the second main body 302 in the first direction is the tip end side, the interval between the pair of side guides 52a becomes narrower from the tip end side toward the base end side. The base end sides of the pair of side guides 52a face each other at an interval through which the wire W can pass.

[0030] The second guide 52 is attached to the second main body 302 via a third guide 55 attached to the second main body 302 by screws or the like. The proximal end side is supported by the shaft 52b and is attached to the second main body 302. The axis of the shaft 52b is in a direction along the third direction. The second guide 52 is rotatable with respect to the second main body 302 with the shaft 52b as a fulcrum. The second guide 52 is movable in a direction approaching and away from the end 51c of the first guide 51A that faces the second guide 52 in the second direction indicated by the arrow A2 at the end 52c on the distal end side. At the end 51c of the first guide 51A, the end P2 of the groove 51h is exposed.

[0031] The second guide 52, in conjunction with a pair of contact members described later, rotates about the shaft 52b as a fulcrum. As shown in FIG. 5A, the distance between the end 52c on the distal end side of the second guide 52 and the end 51c of the first guide 51A is the first distance at the first position, and as shown in FIG. 5B, the distance between the end 52c of the second guide 52 and the end 51c of the first guide 51A is the second distance shorter than the first distance at the second position. It moves between the second position.

[0032] When the second guide 52 is in the second position, the space between the end 52c of the second guide 52 and the end 51c of the first guide 51A is open. When the second guide 52 is in the first position, the interval between the end 52c of the second guide 52 and the end 51c of the first guide 51A widens, making it easier to insert a reinforcing bar into the insertion opening 53 between the first guide 51A and the second guide 52.

[0033] When the second guide 52 is in the second position, the side guide 52a is located on the feed path Wf of the wire W shown in FIG. 5B. When the second guide 52 is in the first position, if the interval between the end 52c of the second guide 52 and the end 51c of the first guide 51A becomes wider than when the second guide 52 is in the second position, the side guide 52a may be located on the feed path Wf of the wire W, or the side guide 52a may be located outside the feed path Wf of the wire W.

[0034] The second guide 52 is biased in the direction of moving to the first position by a biasing member 54 composed of a torsion coil spring or the like, and the state of having moved to the first position is maintained.

[0035] The second guide 52 includes a receiving portion 56 that receives the operation of a pair of contact members described later via a link portion. The receiving portion 56 is composed of a surface perpendicular to the lower surface of the second guide 52 or a surface inclined with respect to a direction perpendicular to the lower surface of the second guide 52. The receiving portion 56 is configured, for example, by providing a surface that protrudes along the rotation direction of the second guide 52 with the shaft 52b as a fulcrum on the lower surface of the second guide 52. The receiving portion 56 is inclined, for example, in a direction in which the distance from the shaft 52b to the surface of the receiving portion 56 becomes longer as it approaches the second guide 52 in a direction parallel to the lower surface of the second guide 52.

[0036] The guide portion 5A includes a guiding portion 59 that guides the reinforcing bar S to the insertion and extraction port 53. The guiding portion 59 is provided on the tip side of the first guide 51A, and is configured by providing a surface where the distance between the first guide 51A and the second guide 52 approaches from the tip side to the base end side of the guiding portion 59. Specifically, the guiding portion 59 is an inclined surface that is inclined in a direction in which the distance between the first guide 51A and the second guide 52 approaches with respect to the first direction indicated by the arrow A1 from the tip P1 of the first guide 51A toward the vicinity of the end P2 of the groove portion 51h on the tip side of the first guide 51A.

[0037] The guide portion 5A includes a protruding portion 57 on the first guide 51A. The protruding portion 57 is configured by providing a portion that protrudes laterally of the first guide 51A along the third direction indicated by the arrow A3. In this example, the first guide 51A has the groove portion 51h having the guide surface 51g described above and the restricting member 43, and the guide arm 51d for guiding the wire W is covered with a cover portion 57A made of a metal plate material. The protruding portion 57 is configured in a form in which the upper end portion of the cover portion 57A covering one side portion of the guide arm 51d and the upper end portion of the cover portion 57A covering the other side portion are bent outward along the third direction. Note that the protruding portion 57 may be provided on the guide arm 51d. Further, the first guide 51A may have a configuration in which the guide arm 51d and the cover portion 57A are integrated, and the protruding portion 57 may be integrally provided on the first guide 51A having a configuration in which the guide arm 51d and the cover portion 57A are integrated. Further, the protruding portion 57 may be configured by providing an uneven shape on the side portion of the cover portion 57A, the side portion of the guide arm 51d, or the side portion of the first guide 51A having a configuration in which the guide arm 51d and the cover portion 57A are integrated.

[0038] The twisting portion 7 includes an engaging portion 70 with which the wire W engages and an operating portion 71 for operating the engaging portion 70. The engaging portion 70 is formed with a first passage through which the wire W sent to the cutting portion 6 by the feeding portion 3 passes, and a second passage through which the wire W that has been given a winding twist by the restricting portion 4 and guided to the twisting portion 7 by the guide portion 5 passes. The engaging portion 70 twists the wire W wound around the reinforcing bar S by rotating by the operation of the operating portion 71.

[0039] The driving portion 8 includes a twisting motor 80 for driving the twisting portion 7 and the like, a speed reducer 81 for performing speed reduction and torque amplification, a rotating shaft 82 that is driven by the twisting motor 80 via the speed reducer 81 and rotates, and a moving member 83 for transmitting a driving force to the cutting portion 6 and the restricting member 42. The twisting portion 7 and the driving portion 8 are arranged such that the rotating shaft 82 and the rotation centers of the operating portion 71 and the engaging portion 70 are coaxially disposed. The rotation center of the rotating shaft 82, the operating portion 71, and the engaging portion 70 is referred to as the axis Ax. In this example, the first direction indicated by the arrow A1 is the direction along the axis Ax.

[0040] The drive unit 8 moves the operating part 71 along the axial direction of the rotary shaft 82 by the rotational operation of the rotary shaft 82. When the operating part 71 moves along the axial direction of the rotary shaft 82, the engaging part 70 holds the tip side of the wire W guided by the twisting part 7 by the guide part 5.

[0041] The drive unit 8 is interlocked with the operation of the operating part 71 moving along the axial direction of the rotary shaft 82. As the moving member 83 moves along the axial direction of the rotary shaft 82, the movement of the moving member 83 is transmitted to the regulating member 42 by the transmission mechanism 44, and the regulating member 42 moves to a position where it does not contact the wire. Further, as the operating part 71 moves along the axial direction of the rotary shaft 82, the movement of the moving member 83 is transmitted to the movable blade part 61 by the transmission mechanism 62, and the movable blade part 61 operates to cut the wire W.

[0042] The drive unit 8 rotates the operating part 71 moved along the axial direction of the rotary shaft 82 by the rotational operation of the rotary shaft 82. The operating part 71 twists the wire W with the engaging part 70 by rotating around the axis of the rotary shaft 82.

[0043] FIG. 6A and FIG. 6B are side views showing the main part configuration of the steel bar tying machine according to the first embodiment, and FIG. 7 is a perspective view showing the main part configuration of the steel bar tying machine according to the first embodiment. Next, the configuration of the contact member and the link part that interlocks the movement of the contact member with the second guide will be described.

[0044] The steel bar tying machine 1A includes a first contact member 9AL and a second contact member 9AR that come into contact with a steel bar S, which is an object to be tied, inserted into the insertion opening 53 between the first guide 51A and the second guide 52. The steel bar tying machine 1A also includes a link part 96 that transmits the movements of the first contact member 9AL and the second contact member 9AR to the second guide 52.

[0045] The first contact member 9AL is an example of a moving part, provided on one side portion of the second main body 302, and includes a contact portion 91AL that abuts against the reinforcing bar S and an acting portion 92AL that actuates the link portion 96. The second contact member 9AR is an example of a moving part, provided on the other side portion of the second main body 302, and includes a contact portion 91AR that abuts against the reinforcing bar S and an acting portion 92AR that actuates the link portion 96.

[0046] The first contact member 9AL is provided so as to be movable along the first direction indicated by the arrow A1, and moves between a standby position where the contact portion 91AL protrudes into the insertion / removal opening 53 as shown in FIG. 1A and an operating position where the second guide 52 is moved to the second position as shown in FIG. 1C.

[0047] The second contact member 9AR is provided so as to be movable along the first direction indicated by the arrow A1, and moves between a standby position where the contact portion 91AR protrudes into the insertion / removal opening 53 as shown in FIG. 1B and an operating position where the second guide 52 is moved to the second position as shown in FIG. 1D.

[0048] The link portion 96 is an example of a guide moving part, and includes a first link member 96L corresponding to the first contact member 9AL and a second link member 96R corresponding to the second contact member 9AR. The link portion 96 is supported such that the first link member 96L and the second link member 96R are rotatable about a shaft 96A that is a moving fulcrum.

[0049] The link portion 96 includes a driven portion 97L connected to the first contact member 9AL on one side of the first link member 96L with respect to the shaft 96A. The driven portion 97L is composed of a member that protrudes laterally from the first link member 96L and contacts the acting portion 92AL of the first contact member 9AL.

[0050] Further, the link portion 96 includes a driven portion 97R connected to the second contact member 9AR on one side of the second link member 96R with respect to the shaft 96A. The driven portion 97R is composed of a member protruding laterally from the second link member 96R and contacts the acting portion 92AR of the second contact member 9AR.

[0051] Furthermore, the link portion 96 includes a connecting portion 98 that connects the first link member 96L and the second link member 96R on the other side with respect to the shaft 96A. The connecting portion 98 includes an acting shaft 98A that contacts the receiving portion 56 of the second guide 52, an opening 98B that supports the acting shaft 98A, and a spring 98C that presses the acting shaft 98A.

[0052] The acting shaft 98A has a cylindrical shape and has a length that connects the first link member 96L and the second link member 96R.

[0053] The openings 98B are provided in the first link member 96L and the second link member 96R, respectively. The openings 98B are configured such that the circumferential length and the radial length orthogonal to the circumferential length along the rotation direction of the link portion 96 with the shaft 96A as a fulcrum are larger than the diameter of the acting shaft 98A. Thereby, the acting shaft 98A inserted into the opening 98B is configured to be movable in the circumferential direction or the tangential direction along the rotation direction of the link portion 96 with the shaft 96A as a fulcrum and in the radial direction orthogonal to the rotation direction.

[0054] The spring 98C is composed of a leaf spring and biases the acting shaft 98A in the direction of the receiving portion 56 of the second guide 52.

[0055] FIGS. 8 to 15A and 15B are explanatory diagrams showing the main part configuration and the operation and effect of the steel bar bundling machine according to the first embodiment. Next, the details of the configuration for attaching the contact member and the link portion will be described.

[0056] The reinforcing bar bundling machine 1A includes a cover guide portion 11 to which a first contact member 9AL, a second contact member 9AR, and a link portion 96 are attached, covering a predetermined portion on the front side of the second main body portion 302. The reinforcing bar bundling machine 1A also includes a first cover portion 12L and a second cover portion 12R attached to the cover guide portion 11.

[0057] The cover guide portion 11 includes a first side wall portion 11L attached to one side portion 302L of the second main body portion 302, a second side wall portion 11R attached to the other side portion 302R of the second main body portion 302, and a connecting portion 11U connecting the first side wall portion 11L and the second side wall portion 11R.

[0058] As shown in FIG. 11, the cover guide portion 11 is integrally formed of a metal plate material with the first side wall portion 11L, the second side wall portion 11R, and the connecting portion 11U. In the cover guide portion 11, the first side wall portion 11L and the second side wall portion 11R face each other at an interval equal to the dimension in the width direction along the third direction indicated by the arrow A3 of the second main body portion 302.

[0059] The first side wall portion 11L extends in the second direction indicated by the arrow A2 from one side portion of the connecting portion 11U along one side portion 302L of the second main body portion 302. The second side wall portion 11R extends in the second direction indicated by the arrow A2 from the other side portion of the connecting portion 11U along the other side portion 302R of the second main body portion 302. The connecting portion 11U is provided with a groove portion 11H into which the first guide 51A enters. The groove portion 11H opens with a width into which the first guide 51A enters, and as shown in FIG. 13, both the left and right sides of the first guide 51A are supported by metal.

[0060] The first cover portion 12L is an example of a cover portion and is configured in a shape that covers a predetermined portion of the first side wall portion 11L of the cover guide portion 11. The second cover portion 12R is an example of a cover portion and is configured in a shape that covers a predetermined portion of the second side wall portion 11R of the cover guide portion 11.

[0061] The cover guide portion 11 includes a first contact portion 13L at the front end of the first side wall portion 11L. Further, the cover guide portion 11 includes a second contact portion 13R at the front end of the second side wall portion 11R.

[0062] The first contact portion 13L is configured in a form that bends the front end of the first side wall portion 11L in the direction of the second side wall portion 11R, and covers the front end of one side portion 302L of the second main body portion 302. The second contact portion 13R is configured in a form that bends the front end of the second side wall portion 11R in the direction of the first side wall portion 11L, and covers the front end of the other side portion 302R of the second main body portion 302.

[0063] The cover guide portion 11 includes a first guide recess 14L1 and a second guide recess 14L2 in the first side wall portion 11L. The first guide recess 14L1 and the second guide recess 14L2 are examples of guide portions, and are formed as elongated hole-shaped openings extending along the moving direction of the first contact member 9AL, which is the first direction indicated by the arrow A1.

[0064] The first cover portion 12L includes a third guide recess 14L3. The third guide recess 14L3 is an example of a guide portion, and is formed as an elongated hole-shaped recess extending along the moving direction of the first contact member 9AL.

[0065] The cover guide portion 11 includes a spring support portion 15L1 in the first side wall portion 11L. The spring support portion 15L1 is formed as a recess into which the spring 95AL enters, with the expanding and contracting direction of the compression coil spring 95AL being along the moving direction of the first contact member 9AL.

[0066] The first cover portion 12L includes a spring support portion 15L2. The spring support portion 15L2 is formed as a recess into which the spring 95AL enters, with the expanding and contracting direction of the spring 95AL being along the moving direction of the first contact member 9AL.

[0067] When the first cover portion 12L is attached to the first side wall portion 11L, as shown in FIG. 9A, the first guide recess 14L1, the second guide recess 14L2, and the third guide recess 14L3, and the spring support portions 15L1 and 15L2 are arranged on the same axis Bx along the moving direction of the first contact member 9AL.

[0068] The cover guide portion 11 includes a first guide recess 14R1 and a second guide recess 14R2 in the second side wall portion 11R. The first guide recess 14R1 and the second guide recess 14R2 are examples of guide portions, and are configured by long hole-shaped openings extending along the moving direction of the second contact member 9AR.

[0069] The second cover portion 12R includes a third guide recess 14R3. The third guide recess 14R3 is an example of a guide portion, and is configured by a long hole-shaped recess extending along the moving direction of the second contact member 9AR.

[0070] The cover guide portion 11 includes a spring support portion 15R1 in the second side wall portion 11R. The spring support portion 15R1 is configured by a recess into which the spring 95AR enters, with the expanding and contracting direction of the compression coil spring 95AR being along the moving direction of the second contact member 9AR.

[0071] The second cover portion 12R includes a spring support portion 15R2. The spring support portion 15R2 is configured by a recess into which the spring 95AR enters, with the expanding and contracting direction of the spring 95AR being along the moving direction of the second contact member 9AR.

[0072] When the second cover portion 12R is attached to the second side wall portion 11R, as shown in FIG. 9B, the first guide recess 14R1, the second guide recess 14R2, and the third guide recess 14R3, and the spring support portions 15R1 and 15R2 are arranged on the same axis along the moving direction of the second contact member 9AR.

[0073] Next, the details of the contact member will be described. The first contact member 9AL includes a guided portion 90AL provided with a contact portion 91AL and an operating portion 92AL, and a detection portion 93AL. The second contact member 9AR includes a guided portion 90AR provided with a contact portion 91AR and an operating portion 92AR, and a detection portion 93AR.

[0074] The first contact member 9AL has a guided portion 90AL made of a plate-shaped metal or the like attached between the first side wall portion 11L of the cover guide portion 11 and the first cover portion 12L.

[0075] The first contact member 9AL includes a first guide convex portion 94AL1 and a second guide convex portion 94AL2 on one surface of the guided portion 90AL facing the first side wall portion 11L of the cover guide portion 11.

[0076] The first guide convex portion 94AL1 protrudes in a direction orthogonal to the moving direction of the first contact member 9AL and enters the first guide concave portion 14L1 of the first side wall portion 11L. The second guide convex portion 94AL2 protrudes in a direction orthogonal to the moving direction of the first contact member 9AL and enters the second guide concave portion 14L2 of the first side wall portion 11L.

[0077] Further, the first contact member 9AL includes a third guide convex portion 94AL3 on the other surface of the guided portion 90AL facing the first cover portion 12L attached to the first side wall portion 11L of the cover guide portion 11. The third guide convex portion 94AL3 protrudes in a direction orthogonal to the moving direction of the first contact member 9AL and enters the third guide concave portion 14L3 of the first cover portion 12L.

[0078] Furthermore, the first contact member 9AL includes a spring attachment portion 94AL4 on the rear end side of the guided portion 90AL. The spring 95AL is attached to the spring attachment portion 94AL4 with the direction in which the spring 95AL expands and contracts along the moving direction of the first contact member 9AL.

[0079] The first contact member 9AL has a first guide convex portion 94AL1, a second guide convex portion 94AL2, and a third guide convex portion 94AL3, and a spring mounting portion 94AL4 and a spring 95AL attached to the spring mounting portion 94AL4 are arranged on a straight line along the moving direction of the first contact member 9AL.

[0080] The first contact member 9AL is provided with a contact portion 91AL on the front end side of the guided portion 90AL. The contact portion 91AL is composed of a surface in a direction intersecting the moving direction of the first contact member 9AL.

[0081] The first contact member 9AL is integrally provided with an acting portion 92AL on the side portion of the guided portion 90AL together with the contact portion 91AL. The acting portion 92AL has an inclined surface inclined with respect to the moving direction of the first contact member 9AL. Or, the acting portion 92AL has an inclined surface inclined with respect to the moving direction of the first contact member 9AL and a perpendicular surface. Note that the acting portion 92AL may have a configuration having no inclined surface inclined with respect to the moving direction of the first contact member 9AL and having a perpendicular surface and a horizontal surface. A space for the first cover portion 12L to enter is formed between the guided portion 90AL and the acting portion 92AL of the first contact member 9AL.

[0082] The first contact member 9AL is integrally provided with a detection portion 93AL together with the guided portion 90AL. The detection portion 93AL projects in the direction of the second contact member 9AR intersecting the moving direction of the first contact member 9AL.

[0083] The second contact member 9AR has a guided portion 90AR made of a plate-like metal or the like, which is attached between the second side wall portion 11R of the cover guide portion 11 and the second cover portion 12R.

[0084] The second contact member 9AR includes a first guide convex portion 94AR1 and a second guide convex portion 94AR2 on one surface of the guided portion 90AR facing the second side wall portion 11R of the cover guide portion 11.

[0085] The first guide convex portion 94AR1 protrudes in a direction orthogonal to the moving direction of the second contact member 9AR and enters the first guide concave portion 14R1 of the second side wall portion 11R. The second guide convex portion 94AR2 protrudes in a direction orthogonal to the moving direction of the second contact member 9AR and enters the second guide concave portion 14R2 of the second side wall portion 11R.

[0086] Further, the second contact member 9AR includes a third guide convex portion 94AR3 on the other surface of the guided portion 90AR facing the second cover portion 12R attached to the second side wall portion 11R of the cover guide portion 11. The third guide convex portion 94AR3 protrudes in a direction orthogonal to the moving direction of the second contact member 9AR and enters the third guide concave portion 14R3 of the second cover portion 12R.

[0087] Furthermore, the second contact member 9AR includes a spring attachment portion 94AR4 on the rear end side of the guided portion 90AR. The spring 95AR is attached to the spring attachment portion 94AR4 such that the expanding and contracting direction of the spring 95AR is along the moving direction of the second contact member 9AR.

[0088] The first guide convex portion 94AR1, the second guide convex portion 94AR2, the third guide convex portion 94AR3, the spring attachment portion 94AR4, and the spring 95AR attached to the spring attachment portion 94AR4 of the second contact member 9AR are arranged on a straight line along the moving direction of the second contact member 9AR.

[0089] A contact portion 91AR is provided on the front end side of the guided portion 90AR of the second contact member 9AR. The contact portion 91AR is composed of a surface in a direction intersecting the moving direction of the second contact member 9AR.

[0090] The second contact member 9AR is provided with an acting portion 92AR on the side portion of the guided portion 90AR integrally with the contact portion 91AR. The acting portion 92AR has an inclined surface inclined with respect to the moving direction of the second contact member 9AR. Alternatively, the acting portion 92AR has an inclined surface inclined with respect to the moving direction of the second contact member 9AR and a perpendicular surface. Note that the acting portion 92AR may have a configuration having a perpendicular surface and a horizontal surface without having an inclined surface inclined with respect to the moving direction of the second contact member 9AR. A space into which the second cover portion 12R enters is formed between the guided portion 90AR and the acting portion 92AR of the second contact member 9AR.

[0091] The second contact member 9AR is provided with a detection portion 93AR integrally with the guided portion 90AR. The detection portion 93AR protrudes in the direction of the first contact member 9AL intersecting the moving direction of the second contact member 9AR.

[0092] Next, the attachment structure of the cover guide portion 11 and the like will be described. The position of the cover guide portion 11 with respect to the second main body portion 302 is defined by the positioning pin 16p. Further, the cover guide portion 11 has the first side wall portion 11L attached to one side portion 302L of the second main body portion 302 by the screw 16La. Furthermore, the cover guide portion 11 has the first side wall portion 11L attached to one side portion 302L of the second main body portion 302 by the screw 16Lb via the first cover portion 12L.

[0093] Therefore, the cover guide portion 11 is provided with a hole portion 17p through which the positioning pin 16p passes in a predetermined arrangement. Further, the second main body portion 302 is provided with a hole portion 18p through which the positioning pin 16p passes in a predetermined arrangement. The hole portion 18p is formed of a hole larger than the diameter of the positioning pin 16p, and a hole (not shown) having a diameter equivalent to that of the positioning pin 16p is provided in the first guide 51A, in this example, the guide arm 51d constituting the first guide 51A, in accordance with the position of the hole portion 18p. Further, the first cover portion 12L is provided with a restricting portion 18pL for suppressing the removal of the positioning pin 16p, and the second cover portion 12R is provided with a restricting portion 18pR for suppressing the removal of the positioning pin 16p.

[0094] The cover guide portion 11 is provided with holes through which the screws 16La and 16Lb pass in a predetermined arrangement on the first side wall portion 11L. Further, the first cover portion 12L is provided with holes through which the screw 16Lb passes in a predetermined arrangement. Furthermore, screw holes into which the screws 16La and 16Lb are fastened are provided in a predetermined arrangement on one side portion 302L of the second main body portion 302.

[0095] Also, the cover guide portion 11 has the first cover portion 12L attached to the first side wall portion 11L with the screw 16Lc. For this reason, the first cover portion 12L is provided with holes through which the screw 16Lc passes in a predetermined arrangement. Also, a screw hole 17Lc into which the screw 16Lc is fastened is provided in a predetermined arrangement on the first side wall portion 11L.

[0096] Specifically, the cover guide portion 11 is placed at a predetermined position of the second main body portion 302, and the positioning pin 16p is passed through the hole portion 17p, so that the position with respect to the second main body portion 302 is defined through a hole portion (not shown) of the guide arm 51d. The cover guide portion 11 has the screw 16La passed through a hole portion (not shown) penetrating the first side wall portion 11L, and this screw 16La is fastened to a screw hole (not shown) provided on one side portion 302L of the second main body portion 302. In addition, in order to enable the operation of the screw 16La without removing the link portion 96, an opening 99 penetrating the first link member 96L and the second link member 96R is provided in the link portion 96.

[0097] Also, the cover guide portion 11 has the screw 16Lb passed through a hole portion (not shown) penetrating the first cover portion 12L and passed through a hole portion 18Lb penetrating the first side wall portion 11L, and this screw 16Lb is fastened to a screw hole (not shown) provided on one side portion 302L of the second main body portion 302.

[0098] Furthermore, the cover guide portion 11 has the screw 16Lc passed through a hole portion (not shown) penetrating the first cover portion 12L, and this screw 16Lc is fastened to the screw hole 17Lc provided on the first side wall portion 11L.

[0099] The cover guide part 11 has the second side wall part 11R attached to the other side part 302R of the second main body part 302 by a screw 16Ra. Also, the cover guide part 11 has the second side wall part 11R attached to the other side part 302R of the second main body part 302 by a screw 16Rb via the second cover part 12R.

[0100] Therefore, in the cover guide part 11, holes through which the screws 16Ra and 16Rb are passed are provided in the second side wall part 11R in a predetermined arrangement. Also, in the second cover part 12R, holes through which the screw 16Rb is passed are provided in a predetermined arrangement. Further, screw holes to which the screws 16Ra and 16Rb are fastened are provided in the other side part 302R of the second main body part 302 in a predetermined arrangement.

[0101] Also, the cover guide part 11 has the second cover part 12R attached to the second side wall part 11R by a screw 16Rc. Therefore, in the second cover part 12R, holes through which the screw 16Rc is passed are provided in a predetermined arrangement. Also, screw holes to which the screw 16Rc is fastened are provided in the second side wall part 11R in a predetermined arrangement.

[0102] Specifically, in the cover guide part 11, the screw 16Ra is passed through a hole (not shown) penetrating the second side wall part 11R, and this screw 16Ra is fastened to a screw hole (not shown) provided in the other side part 302R of the second main body part 302.

[0103] Also, in the cover guide part 11, the screw 16Rb passed through a hole (not shown) penetrating the second cover part 12R is passed through a hole 18Rb penetrating the second side wall part 11R, and this screw 16Rb is fastened to a screw hole (not shown) provided in the other side part 302R of the second main body part 302.

[0104] Further, in the cover guide part 11, the screw 16Rc is passed through a hole (not shown) penetrating the second cover part 12R, and this screw 16Rc is fastened to a screw hole (not shown) provided in the second side wall part 11R.

[0105] As a result, the cover guide portion 11 is attached to the second main body portion 302 in such a manner that the first side wall portion 11L covers a part of one side portion 302L of the second main body portion 302, the second side wall portion 11R covers a part of the other side portion 302R of the second main body portion 302, and the connecting portion 11U covers a part of the upper surface portion 302U of the second main body portion 302.

[0106] Further, a first cover portion 12L is attached to the first side wall portion 11L of the cover guide portion 11, and a second cover portion 12R is attached to the second side wall portion 11R of the cover guide portion 11.

[0107] When the first cover portion 12L is attached to the first side wall portion 11L, the first contact member 9AL has the first guide convex portion 94AL1 received in the first guide concave portion 14L1 of the first side wall portion 11L of the cover guide portion 11, and the second guide convex portion 94AL2 received in the second guide concave portion 14L2 of the first side wall portion 11L.

[0108] Also, for the first contact member 9AL, the spring 95AL attached to the spring attachment portion 94AL4 is received in the spring support portion 15L1 of the first side wall portion 11L. Further, for the first contact member 9AL, the third guide convex portion 94AL3 is received in the third guide concave portion 14L3 of the first cover portion 12L. The spring 95AL attached to the spring attachment portion 94AL4 is received in the spring support portion 15L2 of the first cover portion 12L.

[0109] As a result, the first contact member 9AL is supported so as to be movable along the extending direction of the first guide concave portion 14L1, the second guide concave portion 14L2, and the third guide concave portion 14L3.

[0110] Also, the first contact member 9AL has the portions guiding the movement of the first contact member 9AL, such as the first guide convex portion 94AL1 and the first guide concave portion 14L1, covered by the first cover portion 12L, and the spring 95AL is covered by the first cover portion 12L. Further, the contact portion 91AL and the acting portion 92AL of the first contact member 9AL are exposed from the first cover portion 12L.

[0111] Further, the first contact member 9AL is biased by a spring 95AL in a direction in which the contact portion 91AL protrudes from the first contact portion 13L of the first side wall portion 11L. Further, when the first cover portion 12L is attached to the first side wall portion 11L, the restricting portion 18pL faces the end portion of the positioning pin 16p, and the removal of the positioning pin 16p is suppressed.

[0112] When the second cover portion 12R is attached to the second side wall portion 11R, the first guide convex portion 94AR1 of the second contact member 9AR is inserted into the first guide concave portion 14R1 of the second side wall portion 11R of the cover guide portion 11, and the second guide convex portion 94AR2 is inserted into the second guide concave portion 14R2 of the second side wall portion 11R.

[0113] Further, a spring 95AR attached to the spring attachment portion 94AR4 of the second contact member 9AR is inserted into the spring support portion 15R1 of the second side wall portion 11R. Further, the third guide convex portion 94AR3 of the second contact member 9AR is inserted into the third guide concave portion 14R3 of the second cover portion 12R. The spring 95AR attached to the spring attachment portion 94AR4 is inserted into the spring support portion 15R2 of the second cover portion 12R.

[0114] Thereby, the second contact member 9AR is supported so as to be movable along the extending direction of the first guide concave portion 14R1, the second guide concave portion 14R2, and the third guide concave portion 14R3.

[0115] The first contact member 9AL and the second contact member 9AR are independent components, and each can operate independently.

[0116] Further, the second contact member 9AR is covered by the second cover portion 12R at portions that guide the movement of the second contact member 9AR, such as the first guide convex portion 94AR1 and the first guide concave portion 14R1. Further, the contact portion 91AR and the acting portion 92AR of the second contact member 9AR are exposed from the second cover portion 12R.

[0117] Further, the second contact member 9AR is biased by a spring 95AR in a direction in which the contact portion 91AR protrudes from the second contact portion 13R of the second side wall portion 11R. Further, when the second cover portion 12R is attached to the second side wall portion 11R, the restricting portion 18pR faces the end portion of the positioning pin 16p, and the removal of the positioning pin 16p is suppressed.

[0118] Next, a configuration for detecting a pair of contact members will be described. The second main body portion 302 includes a sensor mounting portion 310. As shown in FIG. 12, the sensor mounting portion 310 is configured by providing an opening that is concave on the upper surface portion 302U of the second main body portion 302, and is mounted in a form in which the sensor substrate unit 311 is exposed.

[0119] The sensor substrate unit 311 includes a first sensor 312L that detects the detection portion 93AL of the first contact member 9AL, and a second sensor 312R that detects the detection portion 93AR of the second contact member 9AR.

[0120] The first sensor 312L is configured by, for example, a magnetic sensor, and the output changes depending on the presence or absence of the detection portion 93AL. When the first contact member 9AL is attached to the cover guide portion 11, the detection portion 93AL enters the sensor mounting portion 310. Further, when the first contact member 9AL moves in the first direction indicated by the arrow A1, the detection portion 93AL moves between a position where it faces the first sensor 312L in a non-contact manner and a position where it does not face the first sensor 312L.

[0121] In this example, when the first contact member 9AL is moved to the standby position, the detection unit 93AL is in a position non-opposed to the first sensor 312L. Also, when the first contact member 9AL is moved to the operating position, the detection unit 93AL is in a position opposed to the first sensor 312L. Note that when the first contact member 9AL is moved to the standby position, the detection unit 93AL may be in a position non-opposed to the first sensor 312L, and when the first contact member 9AL is moved to the operating position, the detection unit 93AL may pass through a position opposed to the first sensor 312L. Further, when the first contact member 9AL is moved to the standby position, the detection unit 93AL may be in a position opposed to the first sensor 312L, and when the first contact member 9AL is moved to the operating position, the detection unit 93AL may be in a position non-opposed to the first sensor 312L.

[0122] The second sensor 312R is constituted by, for example, a magnetic sensor, and its output changes depending on the presence or absence of the detection unit 93AR. When the second contact member 9AR is attached to the cover guide portion 11, the detection unit 93AR enters the sensor attachment portion 310. Also, when the first contact member 9AL moves in the first direction indicated by the arrow A1, the detection unit 93AR moves between a position where it is opposed to the second sensor 312R without contact and a position where it is non-opposed to the second sensor 312R.

[0123] In this example, when the second contact member 9AR is moved to the standby position, the detection unit 93AR is in a position non-facing the second sensor 312R. Also, when the second contact member 9AR is moved to the operating position, the detection unit 93AR is in a position facing the second sensor 312R. Note that when the second contact member 9AR is moved to the standby position, the detection unit 93AR may be in a position non-facing the second sensor 312R, and when the second contact member 9AR is moved to the operating position, the detection unit 93AR may pass through a position facing the second sensor 312R. Further, when the second contact member 9AR is moved to the standby position, the detection unit 93AR may be in a position facing the second sensor 312R, and when the second contact member 9AR is moved to the operating position, the detection unit 93AR may be in a position non-facing the second sensor 312R.

[0124] FIG. 16 is a functional block diagram of the steel bar tying machine according to the first embodiment. The steel bar tying machine 1A detects the output of a first sensor 312L that detects the detection unit 93AL in an operation where the first contact member 9AL is pressed against the steel bar S, a second sensor 312R that detects the detection unit 93AR in an operation where the second contact member 9AR is pressed against the steel bar S, and an orientation detection sensor 350 that detects the orientation of the steel bar tying machine 1A, etc., by a control unit 100A.

[0125] The control unit 100A controls a feed motor 31 that drives the feed gear 30 and a twisting motor 80 that drives the twisting unit 7, etc., according to the outputs of the first sensor 312L and the second sensor 312R and the output of the orientation detection sensor 350, and executes a series of operations for tying the steel bar S with the wire W.

[0126] In this example, when the first contact member 9AL is moved to the standby position shown in FIG. 1A etc., the detection unit 93AL is in a position non-facing the first sensor 312L. The output of the first sensor 312L in this state is turned off. Also, when the first contact member 9AL is moved to the operating position shown in FIG. 1C, the detection unit 93AR is in a position facing the first sensor 312L. The output of the first sensor 312L in this state is turned on. In the configuration where the detection unit 93AL passes through the position facing the first sensor 312L as the first contact member 9AL moves to the operating position, when the detection unit 93AL moves to the position facing the first sensor 312L, the output of the first sensor 312L is turned on. Further, even when the detection unit 93AL passes through the position facing the first sensor 312L, the output of the first sensor 312L is kept on. Also, in the configuration where the detection unit 93AL is in the position facing the first sensor 312L as the first contact member 9AL moves to the standby position and the detection unit 93AL is in the position non-facing the first sensor 312L as the first contact member 9AL moves to the operating position, the output of the first sensor 312L is turned off at the position where the detection unit 93AL faces the first sensor 312L. Further, when the detection unit 93AL moves to the position non-facing the first sensor 312L, the output of the first sensor 312L is turned on.

[0127] Also, when the second contact member 9AR is moved to the standby position shown in FIG. 1B, the detection unit 93AR is in a position non-facing the second sensor 312R. The output of the second sensor 312R in this state is turned off. Further, when the second contact member 9AR is moved to the operating position shown in FIG. 1D, the detection unit 93AR is in a position facing the second sensor 312R. The output of the second sensor 312R in this state is turned on. In a configuration where the detection unit 93AR passes through the position facing the second sensor 312R as the second contact member 9AR moves to the operating position, when the detection unit 93AR moves to the position facing the second sensor 312R, the output of the second sensor 312R is turned on. Further, even when the detection unit 93AR passes through the position facing the second sensor 312R, the output of the second sensor 312R is held on. Also, in a configuration where the detection unit 93AR is in a position facing the second sensor 312R as the second contact member 9AR moves to the standby position, and the detection unit 93AR is in a position non-facing the second sensor 312R as the second contact member 9AR moves to the operating position, the output of the second sensor 312R is turned off at the position where the detection unit 93AR faces the second sensor 312R. Further, when the detection unit 93AR moves to a position non-facing the second sensor 312R, the output of the second sensor 312R is turned on.

[0128] Further, the output of the orientation detection sensor 350 is turned on when the orientation of the rebar tying machine 1A is within a predetermined tying allowable range where the guide portion 5A faces downward, and the output of the orientation detection sensor 350 is turned off when the orientation of the rebar tying machine 1A is outside the predetermined tying allowable range.

[0129] FIG. 17A is a perspective view showing the orientation detection sensor of the first embodiment. The orientation detection sensor 350A of the first embodiment includes an acceleration sensor 351, a switch 352 for switching the presence or absence of detection by the acceleration sensor 351, and an operation unit 353 for switching the on and off of the switch 352.

[0130] The orientation detection sensor 350A is provided on the second main body 302. In this example, the orientation detection sensor 350A is provided in the electrical component unit 360 shown in FIG. 1A. The electrical component unit 360 houses a substrate on which a control unit 100A, a circuit for driving the feed motor 31 and the torsion motor 80, components, etc. are mounted.

[0131] The acceleration sensor 351 detects the orientation of the steel bar tying machine 1A by detecting the acceleration in at least one axial direction. By switching the on and off of the switch 352 with the operation unit 353, it can be switched whether the detection by the acceleration sensor 351 is enabled or disabled.

[0132] FIG. 17B is a perspective view showing the orientation detection sensor of the second embodiment. The orientation detection sensor 350B of the second embodiment includes a photosensor 354, a pendulum 355 detected by the photosensor 354, and an operation unit 356 for switching the presence or absence of the operation of the pendulum 355.

[0133] The orientation detection sensor 350B is provided on the second main body 302. In this example, the orientation detection sensor 350B is provided in the electrical component unit 360 shown in FIG. 1A.

[0134] The pendulum 355 rotates about the axis 355a as a fulcrum according to the orientation of the steel bar tying machine 1A, and the presence or absence of detection by the photosensor 354 is switched to detect the orientation of the steel bar tying machine 1A. By switching the presence or absence of the operation of the pendulum 355 with the operation unit 356, it can be switched whether the detection by the photosensor 354 is enabled or disabled.

[0135] Next, the operation of tying the steel bar S with the wire W by the steel bar tying machine 1A will be described. The operator holds the handle portions 304hL, 304hL of the steel bar tying machine 1A with both hands, aligns the position of the guide portion 5A with the intersection of the two steel bars S, and inserts the steel bar S into the insertion / extraction port 53.

[0136] The steel bar tying machine 1A is used with the operator standing, with the guide part 5A facing downward to tie the steel bar S at the operator's feet. When the second guide 52 is in the moved second position, the interval between the insertion and extraction ports 53 along the second direction indicated by the arrow A2 is narrower compared to the state where the second guide 52 is in the moved first position. Therefore, when inserting the steel bar S, it is difficult to insert the steel bar S into the insertion and extraction port 53 in the conventional tying machine where the second guide 52 is in the second position. Thus, when the steel bar S is not inserted into the insertion and extraction port 53, as shown in FIGS. 1A, 1B, etc., the second guide 52 moves to the first position in the steel bar tying machine 1A, and the interval between the end 52c of the second guide 52 and the end 51c of the first guide 51A widens. Further, a guiding part 59 shaped to guide the steel bar S to the insertion and extraction port 53 is provided on the tip side of the first guide 51A. Thereby, the operator can place the steel bar S against the guiding part 59 and move the steel bar S so that the guiding part 59 slides thereon, making it easier to insert the steel bar S into the insertion and extraction port 53.

[0137] In the operation of inserting the steel bar S into the insertion and extraction port 53 between the first guide 51A and the second guide 52, the steel bar tying machine 1A moves in the first direction indicated by the arrow A1. Due to the relative movement between the steel bar tying machine 1A and the steel bar S, the first contact member 9AL has its contact part 91AL pushed by a force along the first direction indicated by the arrow A1 and moves to the operating position. Also, the second contact member 9AR has its contact part 91AR pushed by a force along the first direction indicated by the arrow A1 and moves to the operating position.

[0138] When the first contact member 9AL moves to the operating position, the output of the first sensor 312L changes from off to on. Also, when the first contact member 9AL moves to the operating position, the acting part 92AL pushes the acted part 97L of the first link member 96L, causing the first link member 96L to rotate about the shaft 96A as a fulcrum. Due to the rotation of the first link member 96L about the shaft 96A as a fulcrum, the acting shaft 98A moves in a direction approaching the first guide 51A. Thereby, the acting shaft 98A pushes the receiving part 56 of the second guide 52, causing the second guide 52 to move to the second position.

[0139] When the second contact member 9AR moves to the operating position, the output of the second sensor 312R changes from off to on. Also, when the second contact member 9AR moves to the operating position, the acting portion 92AR pushes the acted-upon portion 97L of the second link member 96R, causing the second link member 96R to rotate about the shaft 96A as a fulcrum. Due to the rotation of the second link member 96R about the shaft 96A as a fulcrum, the acting shaft 98A moves in a direction approaching the first guide 51A. As a result, the acting shaft 98A pushes the receiving portion 56 of the second guide 52, causing the second guide 52 to move to the second position.

[0140] Note that since the link portion 96 is formed by connecting the first link member 96L and the second link member 96R, when either the first contact member 9AL or the second contact member 9AR moves to the operating position, the second guide 52 moves to the second position.

[0141] FIG. 18 is an explanatory diagram showing the bundling allowable range of the steel bar bundling machine according to the first embodiment, and FIG. 19A is a flowchart showing an example of the operation of the steel bar bundling machine according to the first embodiment. Next, an example of the operation of bundling the steel bar S with the wire W by the steel bar bundling machine 1A will be described.

[0142] In step SA1 of FIG. 19A, the control unit 100A detects whether the orientation of the steel bar bundling machine 1A is within the predetermined bundling allowable range E1 and whether the orientation detection sensor 350 (350A or 350B) is on.

[0143] When the orientation detection sensor 350 is on and the orientation of the steel bar bundling machine 1A is within the predetermined bundling allowable range E1, in step SA2 of FIG. 19A, when the control unit 100A detects that the first sensor 312L is on due to the first contact member 9AL moving to the operating position, in step SA3, the control unit 100A controls the feed motor 31 and the twisting motor 80 to execute a series of operations for bundling the steel bar S with the wire W.

[0144] Alternatively, when the orientation detection sensor 350 is turned on and the orientation of the steel bar tying machine 1A is within the predetermined tying allowable range E1, and the control unit 100A detects that the second sensor 312R is turned on due to the second contact member 9AR moving to the operating position in step SA2 of FIG. 19A, in step SA3, a series of operations are executed.

[0145] Furthermore, when the orientation detection sensor 350 is turned on and the orientation of the steel bar tying machine 1A is within the predetermined tying allowable range E1, and the control unit 100A detects that the first sensor 312L is turned on due to the first contact member 9AL moving to the operating position in step SA2 of FIG. 19A, and also detects that the second sensor 312R is turned on due to the second contact member 9AR moving to the operating position, in step SA3, a series of operations may be executed.

[0146] Here, depending on the orientation of the two steel bars S, the steel bar S may contact either the first contact member 9AL or the second contact member 9AR, but may not contact the other. In such a case, if the tying operation can be executed when either the first sensor 312L or the second sensor 312R is turned on, the tying operation can be surely executed.

[0147] When the orientation detection sensor 350 is not turned on, that is, when the orientation detection sensor 350 is off and the orientation of the steel bar tying machine 1A is outside the predetermined tying allowable range E2, and the control unit 100A detects that the first sensor 312L is turned on due to the first contact member 9AL moving to the operating position in step SA4 of FIG. 19A, in step SA5, it notifies that the tying operation cannot be executed by lighting a lamp (not shown), making a sound, etc.

[0148] Alternatively, when the control unit 100A detects that the orientation detection sensor 350 is off, i.e., the orientation detection sensor 350 is in the off state and the orientation of the rebar tying machine 1A is outside the predetermined tying allowable range E2, and in step SA4 of FIG. 19A, it detects that the second sensor 312R is on because the second contact member 9AR has moved to the operating position, in step SA5, it notifies that the tying operation cannot be executed by lighting a lamp (not shown), making a sound, etc.

[0149] Furthermore, when the control unit 100A detects that the orientation detection sensor 350 is off, i.e., the orientation detection sensor 350 is in the off state and the orientation of the rebar tying machine 1A is outside the predetermined tying allowable range E2, and in step SA4 of FIG. 19A, it detects that the first sensor 312L is on because the first contact member 9AL has moved to the operating position, and also detects that the second sensor 312R is on because the second contact member 9AR has moved to the operating position, in step SA5, it may notify that the tying operation cannot be executed by lighting a lamp (not shown), making a sound, etc.

[0150] After notifying that tying is impossible, when the control unit 100A detects that the first sensor 312L is off because the first contact member 9AL has moved to the standby position, and also detects that the second sensor 312R is off because the second contact member 9AR has moved to the standby position, and further, when the power is turned off or on by operating the power switch 110, it returns to step SA1. Then, when the orientation detection sensor 350 is turned on and the orientation of the rebar tying machine 1A is within the predetermined tying allowable range E1, and it detects that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on because either or both of the first contact member 9AL and the second contact member 9AR have moved to the operating position, it executes the tying operation.

[0151] Alternatively, after notifying that bundling is not possible, when the control unit 100A detects that the first sensor 312L is off because the first contact member 9AL has moved to the standby position, and also detects that the second sensor 312R is off because the second contact member 9AR has moved to the standby position, it returns to step SA1. Then, when the orientation detection sensor 350 is turned on and either or both of the first contact member 9AL and the second contact member 9AR have moved to the operating position in a state where the orientation of the rebar bundling machine 1A is within the predetermined bundling allowable range E1, and it detects that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, it executes the bundling operation.

[0152] Alternatively, after notifying that bundling is not possible, the control unit 100A returns to step SA1. Then, when the orientation detection sensor 350 is turned on and either or both of the first contact member 9AL and the second contact member 9AR have moved to the operating position in a state where the orientation of the rebar bundling machine 1A is within the predetermined bundling allowable range E1, and it detects that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, it executes the bundling operation.

[0153] FIG. 19B is a flowchart showing another example of the operation of the rebar bundling machine according to the first embodiment. Next, another example of the operation of bundling the rebar S with the wire W by the rebar bundling machine 1A will be described.

[0154] In step SB1 of FIG. 19B, when the control unit 100A detects that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on because either or both of the first contact member 9AL and the second contact member 9AR have moved to the operating position, in step SB2 of FIG. 19B, it detects whether the orientation detection sensor 350 is on in a state where the orientation of the rebar bundling machine 1A is within the predetermined bundling allowable range E1.

[0155] When the control unit 100A detects that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, and the orientation detection sensor 350 is on because the orientation of the rebar tying machine 1A is within the predetermined tying allowable range E1, at step SB3, it controls the feed motor 31 and the twisting motor 80 to execute a series of operations for tying the rebar S with the wire W.

[0156] When the control unit 100A detects that the orientation detection sensor 350 is off, that is, the orientation of the rebar tying machine 1A is outside the predetermined tying allowable range E2, while detecting that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, at step SB4, it notifies that the tying operation cannot be executed by lighting a lamp (not shown), making a sound, etc.

[0157] After notifying that tying is impossible, when the control unit 100A detects that the first sensor 312L and the second sensor 312R are off because the first contact member 9AL and the second contact member 9AR have moved to the standby position, and further, when the power is turned off and on by operating the power switch 110, it returns to step SB1. Then, when it detects that the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, and the orientation of the rebar tying machine 1A is within the predetermined tying allowable range E1 and the orientation detection sensor 350 is on, it executes the tying operation.

[0158] Alternatively, after the non-bindable notification, when the control unit 100A detects that the first contact member 9AL and the second contact member 9AR have moved to the standby position and thus the first sensor 312L and the second sensor 312R are off, it returns to step SB1. Then, when it detects that either the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, that the orientation of the rebar tying machine 1A is within the predetermined tying allowable range E1, and that the orientation detection sensor 350 is on, it executes the tying operation.

[0159] Alternatively, after the non-bindable notification, the control unit 100A returns to step SB1. Then, when it detects that either the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, that the orientation of the rebar tying machine 1A is within the predetermined tying allowable range E1, and that the orientation detection sensor 350 is on, it executes the tying operation.

[0160] Note that, in a state where the control unit 100A detects that the orientation of the rebar tying machine 1A is outside the predetermined tying allowable range E2 and the orientation detection sensor 350 is off, if either or both of the first contact member 9AL and the second contact member 9AR move to the operating position and thus the control unit 100A detects that either the first sensor 312L or the second sensor 312R, or both the first sensor 312L and the second sensor 312R are on, various settings of the rebar tying machine 1A may be performed according to the on / off combination of the first sensor 312L and the second sensor 312R.

[0161] Also, when the detection of the orientation detection sensor 350 (350A, 350B) is disabled, the control unit 100A does not execute the bundling operation, and the settings of the rebar bundling machine 1A may be enabled by the on and off combinations of the first sensor 312L and the second sensor 312R due to the operations of the first contact member 9AL and the second contact member 9AR. Further, when the detection of the orientation detection sensor 350 (350A, 350B) is enabled and the orientation cannot be detected from the output of the orientation detection sensor 350 (350A, 350B), the control unit 100A may determine that a failure has occurred in the orientation detection sensor 350 (350A, 350B) and issue a notification.

[0162] Also, the bundling allowable range may be made switchable. For example, the rebar bundling machine 1A is provided with an operation unit 111 such as a dial capable of adjusting the bundling force, and the bundling allowable range may be switched using this operation unit 111. Also, the bundling allowable range may be switched by the on and off combinations of the first sensor 312L and the second sensor 312R due to the operations of the first contact member 9AL and the second contact member 9AR, the on and off of the power supply by the operation of the power switch 110, etc. Further, the bundling allowable range may be switched by a combination of the operation of the operation unit 111, the on and off combinations of the first sensor 312L and the second sensor 312R due to the operations of the first contact member 9AL and the second contact member 9AR, the on and off of the power supply by the operation of the power switch 110, etc. Thereby, the bundling allowable range can be set to a value suitable for the working environment and the work site. For example, it can be set to bundle the rebar S (object to be bundled) not only in the downward direction but also in the horizontal direction and the upward direction for the operator (user). By setting the bundling allowable range to match the working environment and the work site, it is possible to prevent bundling that the operator (user) does not intend and bundling at an unfavorable angle with respect to the rebar S (object to be bundled).

[0163] An example of a series of operations for binding the reinforcing bar S with the wire W will be described. When the feed motor 31 rotates in the forward direction and the feed gear 30 rotates in the forward direction, the wire W is fed in the forward direction indicated by the arrow F. The wire W fed in the forward direction by the feed unit 3 passes through the fixed blade part 60 which is the first regulating member constituting the regulating unit 4 and the regulating member 42 which is the second regulating member. The wire W that has passed through the regulating member 42 is guided by the regulating member 43 which is the third regulating member by contacting the guide surface 51g of the first guide 51A.

[0164] As a result, the wire W fed in the forward direction by the feed unit 3 is bent in an arc shape by contacting the fixed blade part 60, the regulating member 42, the regulating member 43, and the guide surface 51g of the first guide 51A. Then, the wire W fed in the forward direction by the feed unit 3 contacts the fixed blade part 60 and the regulating member 43 from the outer peripheral direction of the arc shape, and the regulating member 42 contacts from the inner peripheral direction of the arc shape between the fixed blade part 60 and the regulating member 43, so that a winding habit of drawing a substantially circle is given.

[0165] There is a predetermined gap between the end 51c of the first guide 51A and the end 52c of the second guide 52 in a state where the second guide 52 has moved to the second position. However, in a state where the second guide 52 has moved to the second position, the pair of side guides 52a are located on the feed path Wf of the wire W, and the wire W fed in the forward direction by the feed unit 3 is given a winding habit by the regulating unit 4 as described above, so it is guided between the pair of side guides 52a of the second guide 52.

[0166] The wire W guided between the pair of side guides 52a of the second guide 52 is guided to the engaging part 70 of the twisting part 7 by the pair of side guides 52a of the second guide 52 when being fed in the forward direction by the feed unit 3. Then, when the control unit 100A determines that the tip of the wire W has been fed to a predetermined position, it stops the drive of the feed motor 31. As a result, the wire W is wound in a spiral around the reinforcing bar S.

[0167] After stopping the forward feed of the wire W, the control unit 100A rotates the twisting motor 80 in the forward direction. By rotating the twisting motor 80 in the forward direction, the engaging portion 70 is actuated by the actuating portion 71, and the tip side of the wire W is held by the engaging portion 70.

[0168] When the control unit 100A determines that the twisting motor 80 has been rotated until the engaging portion 70 holds the wire W, the control unit 100A stops the rotation of the twisting motor 80 and rotates the feed motor 31 in the reverse direction. When the twisting motor 80 is rotated until the engaging portion 70 holds the wire W, the movement of the moving member 83 is transmitted to the regulating member 42 by the transmission mechanism 44, and the regulating member 42 moves to a position where it does not contact the wire.

[0169] When the feed motor 31 rotates in the reverse direction, the feed gear 30 rotates in the reverse direction, and the wire W is fed in the reverse direction indicated by the arrow R. By the operation of feeding the wire W in the reverse direction, the wire W is wound around the reinforcing bar S so as to be in close contact with it.

[0170] When the control unit 100A determines that the feed motor 31 has been rotated in the reverse direction until the wire W is wound around the reinforcing bar S, the control unit 100A stops the rotation of the feed motor 31 and then rotates the twisting motor 80 in the forward direction. By rotating the twisting motor 80 in the forward direction, the movable blade portion 61 is actuated via the transmission mechanism 62 by the moving member 83, and the wire W is cut.

[0171] After the wire W is cut, by continuing the forward rotation of the twisting motor 80, the engaging portion 70 is rotated to twist the wire W.

[0172] When the control unit 100A determines that the twisting motor 80 has been rotated in the forward direction until the wire W is twisted, the control unit 100A rotates the twisting motor 80 in the reverse direction. By rotating the twisting motor 80 in the reverse direction, the engaging portion 70 is returned to the initial position, and the holding of the wire W is released. As a result, it becomes possible to remove the wire W that has bound the reinforcing bar S from the engaging portion 70.

[0173] When the control unit 100A determines that the torsion motor 80 is rotated in the reverse direction until the engaging portion 70 and the like are returned to the initial position, the control unit 100A stops the rotation of the torsion motor 80.

[0174] The operator moves the rebar tying machine 1A in the direction of pulling out the rebar S tied with the wire W from the insertion / removal port 53. When the force pressing the contact portion 91AL of the first contact member 9AL is no longer applied by the operation of moving the rebar tying machine 1A in the direction of pulling out the rebar S from the insertion / removal port 53, the first contact member 9AL moves to the standby position by the force of the spring 95AL. Also, when the force pressing the contact portion 91AR of the second contact member 9AR is no longer applied, the second contact member 9AR moves to the standby position by the force of the spring 95AR. Further, the second guide 52 moves from the second position to the first position by the force of the biasing member 54.

[0175] When the operator moves the rebar tying machine 1A in the direction of pulling out the rebar S tied with the wire W from the insertion / removal port 53, the second guide 52 moves to the first position, and the distance between the end portion 52c of the second guide 52 and the end portion 51c of the first guide 51B increases. This makes it easier to pull out the rebar S from the insertion / removal port 53 and to move to the next tying position.

[0176] <Example of the operation and effect of the rebar tying machine according to the first embodiment> In the rebar tying machine 1A, the first sensor 312L detects that the first contact member 9AL has moved to the operating position, and the second sensor 312R detects that the second contact member 9AR has moved to the operating position, and then the tying operation is executed. Further, depending on the orientation of the rebar tying machine 1A, the execution of the tying operation is switched. Thereby, in a configuration in which the handle portions 304hL and 304hR do not have an operation portion, the operation is simplified and the occurrence of malfunction can be suppressed. Note that, regardless of the orientation of the rebar tying machine 1A, the tying operation may be executed when either the first sensor 312L or the second sensor 312R is turned on.

[0177] In a configuration where the first abutting portion 13L and the second abutting portion 13R are attached to the second main body portion 302, and the first contact member 9AL and the second contact member 9AR are movably supported by the second main body portion 302, there is a possibility that the tolerance between the attachment positions of the first abutting portion 13L and the second abutting portion 13R and the attachment positions of the first contact member 9AL and the second contact member 9AR becomes large. In such a case, with the reinforcing bar S abutted against the first abutting portion 13L or the second abutting portion 13R, there is a possibility that the first contact member 9AL or the second contact member 9AR cannot move to the operating position. If the first contact member 9AL and the second contact member 9AR cannot move to the operating position, the bundling operation cannot be executed.

[0178] Therefore, in the reinforcing bar tying machine 1A, the first contact member 9AL and the second contact member 9AR are movably supported by a cover guide portion 11 having the first abutting portion 13L and the second abutting portion 13R. Thereby, since the moving amounts of the first contact member 9AL and the second contact member 9AR are defined by the cover guide portion 11, the moving amounts of the first contact member 9AL and the second contact member 9AR that abut against and move along the reinforcing bar S can be set within a predefined range before the reinforcing bar S reaches a position where it abuts against the first abutting portion 13L or the second abutting portion 13R. Therefore, the first contact member 9AL and the second contact member 9AR can be surely moved to the operating position.

[0179] Further, since the cover guide portion 11 is integrally formed by a connecting portion 11U with a first side wall portion 11L to which the first contact member 9AL is attached and a second side wall portion 11R to which the second contact member 9AR is attached, the positional accuracy between the first contact member 9AL and the second contact member 9AR can be improved.

[0180] Furthermore, the cover guide portion 11 is shaped to cover a part or all of the front end portion of the second main body portion 302, a part of both the left and right sides on the front side of the second main body portion 302, and the upper surface of the second main body portion 302 between the proximal end side of the first guide 51A and the proximal end side of the second guide 52. Since the second main body portion 302 is made of resin while the cover guide portion 11 is made of metal, wear and damage of the second main body portion 302 can be reduced even when the reinforcing bar S abuts thereon.

[0181] The first guide recess 14L1, the second guide recess 14L2, and the third guide recess 14L3 that guide the movement of the first contact member 9AL, and the spring 95AL that biases the first contact member 9AL are arranged on the same axis Bx along the movement direction of the first contact member 9AL. Thereby, when a force is applied to tilt the first contact member 9AL with respect to the movement direction of the first contact member 9AL, the first contact member 9AL is suppressed from tilting, and the first contact member 9AL can be operated reliably. In particular, the first contact member 9AL moved to the operating position can be reliably moved to the standby position by the spring 95AL. The same applies to the second contact member 9AR.

[0182] Also, when the first cover portion 12L is attached to the first side wall portion 11L of the cover guide portion 11, the first guide recess 14L1, the second guide recess 14L2, and the third guide recess 14L3, and the spring 95AL are covered by the first cover portion 12L. Since the third guide recess 14L3 is configured in an uneven shape rather than an opening, a large opening is not provided on the side portion of the first cover portion 12L. Thereby, it is possible to suppress dust, dirt, and the like from entering the mechanism that guides the movement of the first contact member 9AL, and it is possible to operate the first contact member 9AL reliably.

[0183] Further, when the second cover portion 12R is attached to the second side wall portion 11R, the cover guide portion 11 has the first guide recess 14R1, the second guide recess 14R2, and the third guide recess 14R3, and the spring 95AR is covered by the second cover portion 12R. Since the third guide recess 14R3 is configured in an uneven shape rather than an opening, a large opening is not provided in the side portion of the second cover portion 12R. Thereby, it is possible to suppress dust, dirt, and the like from entering the mechanism that guides the movement of the second contact member 9AR, and it is possible to reliably operate the second contact member 9AR.

[0184] The first cover portion 12L can be removed from the first side wall portion 11L by removing the screws 16Lb and 16Lc. By removing the first cover portion 12L, the first contact member 9AL is exposed, and the first contact member 9AL can be attached to and detached from the first side wall portion 11L.

[0185] The second cover portion 12R can be removed from the second side wall portion 11R by removing the screws 16Rb and 16Rc. By removing the second cover portion 12R, the second contact member 9AR is exposed, and the second contact member 9AR can be attached to and detached from the second side wall portion 11R.

[0186] The first cover portion 12L and the second cover portion 12R are independent components. When removing the first cover portion 12L, it is not necessary to remove the second cover portion 12R. Also, when removing the second cover portion 12R, it is not necessary to remove the first cover portion 12L. Further, when attaching and detaching the first contact member 9AL and the second contact member 9AR, it is not necessary to disassemble the second main body portion 302.

[0187] Furthermore, the cover guide portion 11 can be removed from the second main body portion 302 without removing the link portion 96 from the cover guide portion 11 by removing either the first cover portion 12L or the second cover portion 12R, pulling out the positioning pin 16p, and removing the screw 16Ra. By removing the cover guide portion 11 from the second main body portion 302, as shown in FIG. 12, the sensor substrate unit 311 mounted on the sensor mounting portion 310 is exposed. Thereby, maintenance and inspection of the sensor substrate unit 311 are possible.

[0188] The link portion 96 is attached to the cover guide portion 11 via the shaft 96A. Thereby, an increase in the tolerance between the attachment position of the link portion 96 and the attachment positions of the first contact member 9AL and the second contact member 9AR is suppressed. On the other hand, the second guide 52 is attached to the second main body portion 302. Therefore, it is easily affected by the tolerance between the link portion 96 and the second guide 52. Thus, in the connecting portion 98, by making the opening 98B into which the acting shaft 98A enters larger than the acting shaft 98A, the rotatable amount of the link portion 96 with the shaft 96A as a fulcrum is increased with respect to the rotatable amount of the second guide 52. Thereby, the first contact member 9AL and the second contact member 9AR can be reliably moved to the operating position and can be detected by the first sensor 312L and the second sensor 312R.

[0189] Also, the positions of the axes of the rotational movements of the second guide 52 and the link portion 96 are different. Thus, by enabling the acting shaft 98A to move along the receiving portion 56, the rotational amount of the second guide 52 with respect to the moving amounts of the first contact member 9AL and the second contact member 9AR can be made appropriate.

[0190] The first contact member 9AL and the second contact member 9AR are independent components and each can operate independently. Also, the first sensor 312L for detecting the first contact member 9AL and the second sensor 312R for detecting the second contact member 9AR are also independent, and the movements of the first contact member 9AL and the second contact member 9AR can be detected independently. Thereby, various settings of the steel bar tying machine 1A can be made with combinations of the operations of the first contact member 9AL and the second contact member 9AR. For example, when the detection of the orientation detection sensors 350 (350A, 350B) is invalidated, the control unit 100A does not execute the tying operation, and settings of the steel bar tying machine 1A are enabled with combinations of the operations of the first contact member 9AL and the second contact member 9AR.

[0191] Figure 20 is a perspective view showing an example of the function and effect of the sensor board unit. In the sensor board unit 311, the first sensor 312L and the second sensor 312R are mounted on the same board 313. The board 313 is housed in the first opening 315 of the case 314, and the first opening 315 is sealed with resin. The case 314 is provided with a second opening 316 adjacent to the first opening 315, and the first opening 315 and the second opening 316 are connected by a groove portion 317. Thereby, when the first opening 315 is sealed with resin, the excess resin flows through the groove portion 317 into the second opening 316, and the first opening 315 is sealed with an appropriate amount of resin.

[0192] <Modification example of the steel bar tying machine> Figure 21 is a perspective view showing an example of the steel bar tying machine according to the second embodiment. The steel bar tying machine 1B according to the second embodiment is provided with a guide portion 5B having a first guide 51B and a second guide 52B on one side of the main body portion 10. The steel bar tying machine 1B is provided in a form in which a handle portion 10h protrudes from the other side of the main body portion 10, and a trigger 10t for receiving an operation for operating the steel bar tying machine 1B is provided on the front side of the handle portion 10h.

[0193] The steel bar tying machine 1B includes the above-described first contact member 9AL, the second contact member 9AR, and a cover guide portion 11 to which the first contact member 9AL and the second contact member 9AR are movably attached. Further, it includes a first cover portion 12L and a second cover portion 12R attached to the cover guide portion 11.

[0194] The configurations of the first contact member 9AL, the second contact member 9AR, and the cover guide portion 11 may be the same as those of the steel bar tying machine 1A of the first embodiment, except that they do not include a mechanism for operating the second guide 52B.

[0195] In the steel bar tying machine 1B, the second guide 52B is biased by a spring (not shown) to be in the second position and is configured to be retractable to the first position when an external force is applied.

[0196] FIG. 22 is a perspective view showing an example of a steel bar tying machine according to the third embodiment. The steel bar tying machine 1C according to the third embodiment has a configuration in which the second main body portion 302 of the steel bar tying machine 1A of the first embodiment is attached to a robot arm 370.

Explanation of Reference Numerals

[0197] 1A, 1B, 1C... Steel bar tying machine, 301... First main body part, 302... Second main body part, 302L... Side part, 302R... Side part, 302U... Upper surface part, 303... Connecting part, 10... Main body part, 10h... Handle part, 10t... Trigger, 2... Accommodating part, 3... Feeding part, 4... Restricting part, 5A, 5B... Guide parts, 51A, 51B... First guides, 52, 52B... Second guides, 53... Insertion and extraction opening, 54... Biasing member, 56... Receiving part, 6... Cutting part, 7... Twisting part, 8... Driving part, 9AL... First contact member (moving part), 9AR... Second contact member (moving part), 90AL, 90AR... Guided parts, 91AL, 91AR... Contact parts, 92AL, 92AR... Acting parts, 93AL, 93AR... Detection parts, 94AL1, 94AR1... First guide protrusions, 94AL2, 94AR2... Second guide protrusions, 94AL3, 94AR3... Third guide protrusions, 94AL4, 94AR4... Spring mounting parts, 95AL, 95AR... Springs, 96... Link part (guide moving part), 96A... Axis, 96L, 96R... Link members, 97L, 97R... Actuated parts, 98A... Acting axis, 98B... Opening, 98C... Spring, 11... Cover guide part, 11L... First side wall part, 11R... Second side wall part, 11U... Connecting part, 12L... First cover part (cover part), 12R... Second cover part (cover part), 13L... First contact part, 13R... Second contact part, 14L1, 14R1... First guide recesses, 14L2, 14R2... Second guide recesses, 14L3, 14R3... Third guide recesses, 15L1, 15R1... Spring support parts, 100A... Control part, 110... Power switch, 111... Operation part, 312L... First sensor, 312R... Second sensor, 350... Direction detection sensor, W... Wire

Claims

1. A main body portion, a moving part that moves when it is abutted against an object to be bound; a first guide and a second guide extending in a first direction from one end of the main body and arranged in a second direction perpendicular to the first direction with a space therebetween for receiving an object to be bound, the first guide and the second guide guiding a wire for binding the object to be bound; a guide movement unit that changes the interval from a first distance to a second distance that is shorter than the first distance, The moving unit includes an action unit that operates the guide moving unit, The guide moving portion includes an action shaft that contacts the first guide or the second guide, and an opening that supports the action shaft. Binding machine.

2. The opening is larger than the working shaft. The strapping machine according to claim 1.

3. The opening has a length along the moving direction of the guide moving part that is greater than the action shaft. The strapping machine according to claim 2.

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