Bundling machine

Abstract

A bundling machine is provided. The bundling machine includes a wire conveying section, a bundling section that twists a wire by catching and rotating the wire wound around a reinforcing bar, a curling guide that curls the wire conveyed, an inducing guide that induces the wire curled toward the bundling section, and a contact switch section that operates by being abutted by the reinforcing bar, the contact switch section including an abutment section for the reinforcing bar to abut, the abutment section being disposed on at least one side of an axis of a rotational movement of the bundling section with respect to the reinforcing bar, the axis being disposed in a direction orthogonal to a direction in which the curling guide and the inducing guide are arranged and a direction along the axis.

Description

TECHNICAL FIELD

[0001] The present application relates to a tying machine that ties a bundle such as a reinforcing bar using a wire. BACKGROUND

[0002] Conventionally, a tying machine called a reinforcing bar tying machine that winds a wire around two or more reinforcing bars and twists the wire wound around the reinforcing bars to tie the two or more reinforcing bars using the wire has been proposed.

[0003] The tying machine winds the wire conveyed by the driving force of a motor around the reinforcing bar by passing the wire through a guide member called a curling guide member or the like that causes the wire to curl. The wire that has been curled is guided toward a tying portion that twists the wire by a guide member called an induction guide member or the like, and the wire wound around the reinforcing bar is twisted by the tying portion, whereby the reinforcing bar is tied by the wire.

[0004] In such a tying machine, a tying machine that not only detects the operation of a trigger switch portion provided in a handle portion but also detects a member or a reinforcing bar disposed in the vicinity of a member against which a contact member or the like is abutted to perform a tying operation has been proposed.

[0005] In a structure that detects that the contact member is abutted to the member disposed in the vicinity of the position of the reinforcing bar, a portion of the contact member is provided protruding from a guide member that protrudes forward among the guide members that cause the wire to curl and the guide members that induce the wire that has been curled. Further, a structure that causes the contact member to operate by abutting the front end of the guide member to the member disposed in the vicinity of the position of the reinforcing bar has been proposed (for example, refer to Japanese Patent No. 2949703).

[0006] Further, in a structure that detects that the contact member is abutted to the reinforcing bar, one of the guide members that cause the wire to curl and the guide members that induce the wire that has been curled is provided with a contact member that can move in a direction approaching the guide member. Further, a structure that causes the contact member to operate by abutting the reinforcing bar to the guide member has been proposed (for example, refer to Japanese Patent No. 6887760).

[0007] In the structure that causes the contact member to operate by abutting the front end of the guide member to the member disposed in the vicinity of the position of the reinforcing bar, the tying operation is performed even if the reinforcing bar is far from the tying portion that twists the reinforcing bar, and thus a gap is easily generated between the reinforcing bar and the wire, and the tying force becomes weak.

[0008] Further, in the structure that causes the contact member to operate by abutting the reinforcing bar to the guide member, the reinforcing bar is deviated from the position where the wire is twisted by the tying portion, and thus a gap is easily generated between the reinforcing bar and the wire, and the tying force becomes weak.

[0009] The present application has been made to solve such a problem, and aims to provide a tying machine that can ensure tying strength. SUMMARY

[0010] To solve the above problems, the present application is a strapping machine having a main body provided with: a thread feeding section that feeds a thread to be wound around a strapping object; a strapping section that twists the thread by catching and rotating the thread wound around the strapping object; a curling guide that curls the thread fed by the thread feeding section; an inducing guide that induces the thread curled by the curling guide toward the strapping section; and a contact switch section that operates by being abutted by the strapping object, the curling guide and the inducing guide are provided at one end of the main body in a direction along an axis of a rotational movement of the strapping section, the contact switch section is provided with an abutment section against which the strapping object is abutted, the abutment section is provided between the curling guide and the inducing guide at least on one side in a direction orthogonal to the direction along which the curling guide and the inducing guide are arranged and the direction along the axis, the protrusion amount along the axis from the one end of the main body to the front end of the abutment section is shorter than at least one of the protrusion amount along the axis from the one end of the main body to the front end of the curling guide and the protrusion amount along the axis from the one end of the main body to the front end of the inducing guide, and a strapping operation is performed when the contact switch section operates with the strapping object being abutted to the abutment section.

[0011] In the present application, the contact switch section operates when the strapping object is abutted to the abutment section, and thus a strapping operation is performed.

[0012] In the present application, a strapping operation can be performed in a state where the strapping object is located on or near an extension line of the axis of the rotational movement of the strapping section. In addition, the abutment section does not protrude more than the curling guide and the inducing guide. Thus, contact of a structure located further forward than the curling guide and the inducing guide with the abutment section can be suppressed, and a strapping operation can be performed in a state where the strapping object is located on or near the extension line of the axis of the rotational movement of the strapping section. Thus, the position where the thread is twisted can be prevented from greatly deviating from the position of the strapping object, and the strapping strength can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is an internal structure view from the side showing one example of the overall structure of the steel bar strapping machine of the present embodiment.

[0014] Figure 2A is a side view showing one example of the overall structure of the steel bar strapping machine of the present embodiment.

[0015] Figure 2B is a side view showing one example of the overall structure of the steel bar strapping machine of the present embodiment.

[0016] Figure 2C is a front view showing one example of the overall structure of the steel bar strapping machine of the present embodiment.

[0017] Figure 2D is a plan view showing an example of the overall structure of the steel bar tying machine of the embodiment.

[0018] Figure 3A is an internal structure view from the side showing an example of the overall structure of the steel bar tying machine of the embodiment.

[0019] Figure 3B is Figure 3A is a cross-sectional view of the A-A line in

[0020] Figure 3C is Figure 3A is a cross-sectional view of the B-B line in

[0021] Figure 4A is a perspective view showing an example of the overall structure of the steel bar tying machine of the embodiment.

[0022] Figure 4B is Figure 4A is a cross-sectional view of the main portion C-C line in

[0023] Figure 5A is a perspective view showing an example of the contact switch portion of the embodiment.

[0024] Figure 5B is a plan view showing an example of the contact switch portion of the embodiment.

[0025] Figure 5C is a side view showing an example of the contact switch portion of the embodiment.

[0026] Figure 5D is a side view showing an example of the contact switch portion of the embodiment.

[0027] Figure 5E is a front view showing an example of the contact switch portion of the embodiment.

[0028] Figure 6A is a main portion side view showing an example of the mounting structure of the contact switch portion of the embodiment.

[0029] Figure 6B is a main portion side view showing an example of the mounting structure of the contact switch portion of the embodiment.

[0030] Figure 7 is a main portion side view showing an example of the operation of the steel bar tying machine of the embodiment.

[0031] Figure 8A is a plan view of the contact switch portion showing an example of the operation of the steel bar tying machine of the embodiment.

[0032] Figure 8B This is a top view of the contact switch section, showing an example of the operation of the rebar tying machine according to this embodiment.

[0033] Figure 8C This is a top view of the contact switch section, showing an example of the operation of the rebar tying machine according to this embodiment.

[0034] Figure 8D This is a top view of the contact switch section, showing an example of the operation of the rebar tying machine according to this embodiment. Detailed Implementation

[0035] Hereinafter, an example of a rebar tying machine that is an embodiment of the tying machine of the present invention will be described with reference to the accompanying drawings.

[0036] <Structural Example of the Rebar Binding Machine in This Embodiment>

[0037] Figure 1 This is a side view of the internal structure of an example of the overall structure of the rebar tying machine according to this embodiment. Additionally, Figure 2A , Figure 2B 1A is a side view showing an example of the overall structure of the rebar tying machine according to this embodiment, and 2B is a front view showing an example of the overall structure of the rebar tying machine according to this embodiment. Figure 2D This is a top view showing an example of the overall structure of the rebar tying machine according to this embodiment.

[0038] and, Figure 3A This is an internal structural diagram viewed from the side, showing an example of the overall structure of the rebar tying machine according to this embodiment. Figure 3B , Figure 3C This is a cross-sectional view taken from the top surface, showing an example of the overall structure of the rebar tying machine according to this embodiment. Figure 3B yes Figure 3A AA-line sectional view, Figure 3C yes Figure 3A A BB-line sectional view. Additionally... Figure 4A This is a perspective view showing an example of the overall structure of the rebar tying machine according to this embodiment. Figure 4B yes Figure 4A The main part is a CC-line sectional view.

[0039] The rebar tying machine 1 feeds the wire W in the positive direction indicated by arrow F0 and winds it around the rebar S, which is to be tied. The wire W wound around the rebar S is then fed in the opposite direction indicated by arrow R0 and wound around the rebar S. After being cut, the wire W is twisted and used to tie the rebar S.

[0040] The steel bar tying machine 1 has a spool 20 that winds a long steel wire W in a manner that the steel wire W can be unwound, and a wire feeding unit 3 that feeds the steel wire W. The steel bar tying machine 1 has a crimping unit 5 that forms a path along which the steel wire W fed by the wire feeding unit 3 is wound around a steel bar S, and a cutting unit 6 that cuts the steel wire W wound around the steel bar S. The steel bar tying machine 1 has a tying unit 7 that twists the steel wire W wound around the steel bar S, and a drive unit 8 that drives the tying unit 7.

[0041] The steel bar tying machine 1 has a main body 10 and a handle 11.

[0042] The steel bar tying machine 1 has a trigger switch unit 12 that operates in response to an operation of a hand that holds the handle 11, and a contact switch unit 9 that operates in response to a contact of the steel bar S. In the steel bar tying machine 1, the tying operation is performed when the trigger switch unit 12 operates and the contact switch unit 9 operates. In the steel bar tying machine 1, the tying operation can be performed when the contact switch unit 9 operates in a state where the trigger switch unit 12 operates. In the steel bar tying machine 1, the tying operation can be performed when the trigger switch unit 12 operates in a state where the contact switch unit 9 operates. In the steel bar tying machine 1, the tying operation can be performed when the contact switch unit 9 operates, and the steel bar tying machine 1 can not have the trigger switch unit 12.

[0043] The spool 20 is an example of a storage unit that stores the long steel wire W in a manner that the steel wire W can be unwound. The steel wire W is a wire that is formed of a metal wire that can be plastically deformed, a wire that is formed of a metal wire that is covered with a resin, or a twisted wire.

[0044] The wire feeding unit 3 has a pair of feeding gears 30 that grip and feed one or a plurality of steel wires W, and a feeding motor (not shown) that drives the feeding gears 30. The wire feeding unit 3 is transmitted with a rotational operation of the feeding motor via a transmission mechanism, and the feeding gears 30 are rotated.

[0045] The wire feeding unit 3 feeds the steel wire W gripped between the pair of feeding gears 30 in a direction in which the steel wire W extends. In a structure in which a plurality of (for example, two) steel wires W are fed, the two steel wires W are fed in a parallel state.

[0046] In the wire feeding unit 3, the feeding direction of the steel wire W is set to a forward direction that is one direction and a reverse direction that is a direction opposite to the one direction by switching the forward and reverse of the rotational direction of the feeding motor.

[0047] The wire guide 4 is provided at a predetermined position on the upstream side and the downstream side of the wire feeding section 3 with respect to the feeding direction in which the wire W is fed in the positive direction. In the structure in which two wires W are fed, the wire guide 4 restricts the radial direction of the two wires W and guides the two incoming wires W in parallel to each other between the pair of feeding gears 30.

[0048] The curling formation section 5 has a curling guide 50 that causes the wire W fed by the wire feeding section 3 to be curled and an inducing guide 51 that induces the wire W curled by the curling guide 50 to the binding section 7. In the reinforcing bar binding machine 1, the path of the wire W fed by the wire feeding section 3 is restricted by the curling formation section 5, and the trajectory of the wire W becomes a loop Ru as shown by the double-dotted line in FIG. 6, and the wire W is wound around the reinforcing bar S. Figure 1

[0049] The cutting section 6 has a fixed blade section 60, a movable blade section 61 that cuts the wire W by cooperating with the fixed blade section 60, and a transmission mechanism 62 that transmits the operation of the binding section 7 to the movable blade section 61. The cutting section 6 cuts the wire W by the rotational operation of the movable blade section 61 with the fixed blade section 60 as a fulcrum.

[0050] The binding section 7 has a wire clamping body 70 in which the wire W is clamped and a rotating shaft 72 that operates the wire clamping body 70. The driving section 8 has a motor 80 and a speed reducer 81 that reduces the speed and amplifies the torque. In the binding section 7 and the driving section 8, the rotating shaft 72 is linked to the motor 80 via the speed reducer 81, and the rotating shaft 72 is driven by the motor 80 via the speed reducer 81.

[0051] The wire clamping body 70 has a central hook 70C linked to the rotating shaft 72, a first side hook 70R and a second side hook 70L that open and close with respect to the central hook 70C, and a sleeve 71 that operates the first side hook 70R and the second side hook 70L in conjunction with the rotational operation of the rotating shaft 72.

[0052] In the binding section 7, one side in which the central hook 70C and the first side hook 70R and the second side hook 70L are provided is set as the front side, and the side in which the rotating shaft 72 is linked to the speed reducer 81 is set as the rear side.

[0053] The central hook 70C is linked to the end portion, i.e., the front end, of one side of the rotating shaft 72 via a structure that can rotate with respect to the rotating shaft 72 and can move in the axial direction integrally with the rotating shaft 72.

[0054] One end portion, i.e., the front end side, of the first side hook 70R in the axial direction of the rotating shaft 72 is located at one side portion with respect to the central hook 70C. In addition, the other end portion, i.e., the rear end side, of the first side hook 70R in the axial direction of the rotating shaft 72 is supported to the central hook 70C in a rotatable manner by the shaft 71b. ​

[0055] One end of the second side hook 70L along the axial direction of the rotation shaft 72, i.e., the front end side, is located on the other side with respect to the central hook 70C. In addition, the other end of the second side hook 70L along the axial direction of the rotation shaft 72, i.e., the rear end side, is rotatably supported to the central hook 70C by the shaft 71b.

[0056] Thus, in the thread catching body 70, the front end side of the first side hook 70R is opened and closed in a direction of moving away from the central hook 70C by a rotational movement of the shaft 71b as a fulcrum. In addition, the front end side of the second side hook 70L is opened and closed in a direction of moving away from the central hook 70C.

[0057] The sleeve 71 is a cylindrical shape covering the periphery of the rotation shaft 72, has a protrusion (not shown) protruding from the inner peripheral surface of the space of the cylindrical shape into which the rotation shaft 72 is inserted, and the protrusion enters a groove portion of the feed screw 72a formed along the axial direction of the outer periphery of the rotation shaft 72. When the rotation shaft 72 rotates, the sleeve 71 moves in the direction along the axial direction of the rotation shaft 72, i.e., the front-rear direction, according to the rotational direction of the rotation shaft 72 by the action of the protrusion (not shown) and the feed screw 72a of the rotation shaft 72. In addition, the sleeve 71 rotates integrally with the rotation shaft 72.

[0058] The sleeve 71 has an opening and closing pin 71a that opens and closes the first side hook 70R and the second side hook 70L.

[0059] The opening and closing pin 71a is inserted into an opening and closing guide hole 73 provided to the first side hook 70R and the second side hook 70L. The opening and closing guide hole 73 extends along the moving direction of the sleeve 71, and has a shape that converts the linear direction movement of the opening and closing pin 71a moving in conjunction with the sleeve 71 into the opening and closing movement based on the rotation of the first side hook 70R and the second side hook 70L as a fulcrum of the shaft 71b.

[0060] In the thread catching body 70, the sleeve 71 moves in the rear direction indicated by the arrow R1, and thus the first side hook 70R and the second side hook 70L move in the direction away from the central hook 70C by the rotational movement as a fulcrum of the shaft 71b by the trajectory of the opening and closing pin 71a and the shape of the opening and closing guide hole 73.

[0061] Thus, the first side hook 70R and the second side hook 70L are opened with respect to the central hook 70C, and a feed path for the thread W to pass through is formed between the first side hook 70R and the central hook 70C and between the second side hook 70L and the central hook 70C.

[0062] When the sleeve 71 moves to the non-rotating region, the first side hook 70R and the second side hook 70L become an open state with respect to the central hook 70C, and the yarn W transported by the yarn transporting section 3 passes between the central hook 70C and the first side hook 70R. The yarn W passing between the central hook 70C and the first side hook 70R is induced by the crimping section 5. Also, the yarn W crimped by the crimping section 5 and induced to the bundling section 7 passes between the central hook 70C and the second side hook 70L.

[0063] In the yarn locking body 70, the sleeve 71 moves in the forward direction indicated by the arrow Fl, and the first side hook 70R and the second side hook 70L move in a direction close to the central hook 70C by a rotational action around the shaft 71b by the trajectory of the opening and closing pin 71a and the shape of the opening and closing guide hole 73. Thus, the first side hook 70R and the second side hook 70L close with respect to the central hook 70C.

[0064] When the first side hook 70R closes with respect to the central hook 70C, the yarn W sandwiched between the first side hook 70R and the central hook 70C is locked in a state capable of moving in the extending direction between the first side hook 70R and the central hook 70C. Also, when the second side hook 70L closes with respect to the central hook 70C, the yarn W sandwiched between the second side hook 70L and the central hook 70C is locked in a state not coming out from between the second side hook 70L and the central hook 70C.

[0065] The yarn locking body 70 has a bending section 71c1 that shapes the yarn W into a predetermined shape by bending one end, i.e., the front end side, of the yarn W in a predetermined direction. Also, the yarn locking body 70 has a bending section 71c2 that shapes the yarn W into a predetermined shape by bending the other end, i.e., the terminal end side, of the yarn W after being cut by the cutting section 6 in a predetermined direction.

[0066] The sleeve 71 is divided into two parts by the first side hook 70R and the second side hook 70L and the central hook 70C sandwiching the end portion in the forward direction indicated by the arrow Fl, and has the bending section 71c1 formed at the end portion in the forward direction on the upper side in the non-rotating region and the bending section 71c2 formed at the end portion in the forward direction on the lower side.

[0067] The sleeve 71 further moves in the forward direction indicated by the arrow Fl after cutting the yarn W by the cutting section 6, and the front end side of the yarn W locked by the central hook 70C and the second side hook 70L is pressed by the bending section 71c1 and bent toward the steel bar S. Also, the terminal end side of the yarn W locked by the central hook 70C and the first side hook 70R after being cut by the cutting section 6 is pressed by the bending section 71c2 and bent toward the steel bar S.

[0068] After the front end side and the terminal side of the wire W are bent toward the steel bar S side, when the sleeve 71 is further moved in the forward direction, the sleeve 71 rotates in conjunction with the rotation shaft 72, and the wire W clamped by the wire clamping body 70 is twisted.

[0069] In the rotation shaft 72, the other end, that is, the rear end is linked to the speed reducer 81 via a linking portion 72b having a structure capable of rotating integrally with the speed reducer 81 and capable of moving in the axial direction with respect to the speed reducer 81. The linking portion 72b is provided with a spring 72c that presses the rotation shaft 72 in the direction approaching the speed reducer 81, that is, the rearward direction, and restricts the position of the rotation shaft 72 in the axial direction. Thus, the rotation shaft 72 is configured to be capable of moving in the direction away from the speed reducer 81, that is, the forward direction, while being pressed in the rearward direction by the spring 72c. Thus, when a force that moves the wire clamping body 70 in the forward direction in the axial direction is applied in the operation of binding the steel bar S with the wire W, the wire W can be bound in such a manner as to be in close contact with the steel bar S by the rotation shaft 72 moving in the forward direction while being pressed in the rearward direction by the spring 72c.

[0070] In the steel bar binding machine 1, the curl guide 50 and the induction guide 51 of the curl forming portion 5 described above are provided at the end portion of the front side of the main body portion 10 on one side in the axial direction of the rotation shaft 72.

[0071] Figure 5A is a perspective view showing an example of the contact switch portion of the present embodiment, Figure 5B is a plan view showing an example of the contact switch portion of the present embodiment, Figure 5C Figure 5D is a side view showing an example of the contact switch portion of the present embodiment, Figure 5E is a front view showing an example of the contact switch portion of the present embodiment. In addition, Figure 6A Figure 6B is a main part side view showing an example of the mounting structure of the contact switch portion of the present embodiment.

[0072] The contact switch portion 9 is provided with a pair of abutting portions 91 (a first abutting portion 91a and a second abutting portion 92b) for the steel bar S to abut against. The abutting portions 91 are not protruded beyond the front end position PF of the induction guide 51, which is less protruded than the induction guide 51 from the main body portion 10, in order for the steel bar S that has entered between the curl guide 50 and the induction guide 51 to abut against, and are provided between the curl guide 50 and the induction guide 51 at the end portion of the front side of the main body portion 10.

[0073] ​​The abutting portion 91 is provided on at least one side in the left-right direction (arrow L2, R2 direction) orthogonal to the direction in which the curling guide 50 and the inducing guide 51 are arranged, that is, the extension line of the axis center of the rotation axis 72 of the twisting action of the twisting portion 7 with respect to the axis of the wire W being clamped and the clamped wire W being twisted by the wire clamping body 70 to be twisted and bundled. In this example, the first abutting portion 91a is provided on one side in the arrow L2, R2 direction (left side when viewed from the front), and the second abutting portion 91b is provided on the other side (right side when viewed from the front).

[0074] The first abutting portion 91a and the second abutting portion 91b extend in the direction in which the curling guide 50 and the inducing guide 51 are arranged, and the reinforcing bar S entering the curling guide 50 and the inducing guide 51 can contact at least one of the first abutting portion 91a and the second abutting portion 91b on the extension line of the axis L of the twisting action of the twisting portion 7.

[0075] In addition, the abutting portion 91 (the first abutting portion 91a, the second abutting portion 92b) is configured so that the protruding amount L11 from the end of the main body portion 10 on one side, that is, the front end position PF1 to the front end position PF2 protruding along the axis L is shorter than the protruding amount L12 from the front end position PF1 of the main body portion 10 to the front end position PF of the curling guide 50 and the inducing guide 51 protruding along the axis L.

[0076] In this example, the inducing guide 51 of the curling guide 50 and the inducing guide 51 has a smaller protruding amount from the front end position PF1 of the main body portion 10. Therefore, the abutting portion 91 (the first abutting portion 91a, the second abutting portion 91b) is configured so that the protruding amount L11 from the front end position PF1 of the main body portion 10 to the most protruding position among the positions protruding along the axis L is shorter than the protruding amount L12 from the front end position PF1 of the main body portion 10 to the front end position PF of the inducing guide 51 protruding along the axis L.

[0077] Thus, the front end position PF2 of the abutting portion 91 (the first abutting portion 91a, the second abutting portion 91b) protruding along the axis L is not more protruding than the front end position PF of the inducing guide 51 of the curling guide 50 and the inducing guide 51 having a smaller protruding amount from the main body portion 10. Thus, it is possible to suppress the structure at the front side than the front end positions of the curling guide 50 and the inducing guide 51 from contacting the abutting portion 91 to operate the abutting portion 91.

[0078] The contact switch unit 9 includes a pair of moving members 92 (first moving member 92a, second moving member 92b) that support the first abutment 91a and the second abutment 91b in a manner that allows them to move independently in the front-back direction along the axis L of the rotational movement of the binding unit 7. Additionally, the contact switch unit 9 includes a pair of force-applying members 93 (first force-applying member 93a, second force-applying member 93b) that independently apply force to the first abutment 91a and the second abutment 91b in the forward direction.

[0079] The main body 10 is a structure consisting of two shells, 14L and 14R, which are divided into left and right sides when viewed from the front and assembled together by screws or the like. A first abutment 91a is mounted to one of the shells 14L constituting the main body 10 via a first moving member 92a. The shell 14L has a support portion 16L at its front end that supports the first moving member 92a in a manner that allows it to move in the front-rear direction. The first moving member 92a, on which the first abutment 91a is mounted, is supported by the support portion 16L of the shell 14L in a state that allows it to move in the front-rear direction. Thus, the first abutment 91a is supported at the front end of the main body 10 in a linear direction that allows it to move along the axis L of the rotational movement of the binding portion 7.

[0080] The first force-applying member 93a, for example, is a coil spring, which applies a force in the forward direction to the first moving member 92a, which is supported on the support portion 16L of the housing 14L in a state that allows it to move in the front-rear direction. As a result, the first abutment portion 91a is forced forward in a direction that protrudes from the front end of the main body portion 10. In addition, when the first abutment portion 91a is subjected to a rearward pressing force, it moves rearward while compressing the first force-applying member 93a.

[0081] The first position where the first abutting part 91a protrudes forward from the front end of the main body 10 under the force applied by the first force-applying member 93a is called the initial position P1. The second position where the first abutting part 91a moves backward by a predetermined amount while compressing the first force-applying member 93a is called the binding position P2.

[0082] The second abutment 91b is mounted to another housing 14R constituting the main body 10 via the second moving member 92b. The housing 14R has a support portion 16R at its front end that supports the second moving member 92b in a manner that allows it to move in the front-rear direction. The second moving member 92b, on which the second abutment 91b is mounted, is supported by the support portion 16R of the housing 14R in a state that allows it to move in the front-rear direction. Thus, the second abutment 91b is supported at the front end of the main body 10 in a manner that allows it to move independently of the first abutment 91a in a linear direction.

[0083] The second urging member 93b, for example, is constituted by a coil spring, and urges the second moving member 92b, which is supported to the support portion 16R of the housing 14R in a state of being able to move in the front-rear direction, in the front direction. Thus, the second abutting portion 91b is urged in a direction in which the end portion of the main body portion 10 from the front side is independent of the first abutting portion 91a and protrudes forward. In addition, when the second abutting portion 91b is pressed in the rearward direction, the second abutting portion 91b moves in the rearward direction while compressing the second urging member 93b.

[0084] A first position in which the second abutting portion 91b protrudes forward from the end portion of the main body portion 10 from the front side by the urging of the second urging member 93b is referred to as an initial position P1. In addition, a second position in which the second abutting portion 91b moves in the rearward direction by a predetermined amount while compressing the second urging member 93b is referred to as a binding position P2.

[0085] The contact switch portion 9 is provided with a detection portion 94 that detects the operation of the first abutting portion 91a and the second abutting portion 91b, and a transmission member 95 that transmits the operation of the first abutting portion 91a and the second abutting portion 91b to the detection portion 94.

[0086] The detection portion 94, for example, is constituted by a switch called a micro switch, and outputs change by being pressed by a predetermined amount by a movable member 94a. The detection portion 94 is installed in one housing 14R in an orientation in which the moving direction of the movable member 94a is the front-rear direction. In addition, the detection portion 94 can be another switch other than a micro switch, a sensor, a non-contact sensor such as a Hall sensor or an optical sensor.

[0087] The transmission member 95 is rotatably installed to the first moving member 92a on which the first abutting portion 91a is installed via a shaft 95a. The transmission member 95 moves in the front-rear direction together with the first moving member 92a, and is displaced with respect to the first moving member 92a by a rotational operation about the shaft 95a. An end portion of the transmission member 95, which is opposite to an end portion supported to the shaft 95a and which is displaced by the rotational operation about the shaft 95a, faces the movable member 94a of the detection portion 94.

[0088] An end portion of the transmission member 95, which is opposite to the side supported to the shaft 95a, is engaged with the second moving member 92b on which the second abutting portion 91b is installed. The end portion of the transmission member 95, which is opposite to the side supported to the shaft 95a, is urged in a direction in which the second moving member 92b is pressed by an urging member 95b such as a coil spring.

[0089] Thus, when the first abutting portion 91a is pressed in the rearward direction and the first moving member 92a moves in the rearward direction, the transmission member 95 moves in the rearward direction together with the first moving member 92a, and presses the movable member 94a of the detection portion 94.

[0090] In addition, when the second abutting portion 91b is pressed rearward and the second moving member 92b moves in the rearward direction, the transmission member 95 rotates about the shaft 95a while compressing the urging member 95b, and the movable member 94a of the pressing detection portion 94 is pressed.

[0091] In addition, the first abutting portion 91a and the second abutting portion 91b can be configured to move by a rotational operation in such a manner that the moving directions of the first abutting portion 91a and the second abutting portion 91b trace circular arcs in the front-rear direction along the axis L of the rotational operation of the binding portion 7.

[0092] The trigger switch portion 12 includes a trigger 13a that is displaceable in the front-rear direction by the operation of a finger on the side of the handle portion 11, i.e., the front side. In addition, the trigger switch portion 12 includes a switch 13b that detects the operation of the trigger 13a in the interior of the handle portion 11.

[0093] The reinforcing bar binding machine 1 includes a control portion 100 that performs a binding operation in accordance with the operation of the contact switch portion 9 and the trigger switch portion 12. When the trigger switch portion 12 is operated and the contact switch portion 9 is operated, the control portion 100 controls the motor 80 and a not-shown conveyance motor that drives the conveyance gear 30 to perform a binding operation. In a state in which the trigger switch portion 12 is operated, when the contact switch portion 9 is operated, the control portion 100 performs a binding operation. In addition, it can also be that, in a state in which the contact switch portion 9 is operated, when the trigger switch portion 12 is operated, the control portion 100 performs a binding operation. In addition, it can also be that, when the contact switch portion 9 is operated, the control portion 100 performs a binding operation, and it can also be a configuration that does not include the trigger switch portion 12.

[0094] The handle portion 11 of the reinforcing bar binding machine 1 extends downward from the main body portion 10. In addition, a battery 15 is detachably attached to the lower portion of the handle portion 11. Furthermore, in the reinforcing bar binding machine 1, the magazine 2 is disposed in front of the handle portion 11. In the reinforcing bar binding machine 1, the above-described wire conveyance portion 3, the cutting portion 6, the binding portion 7, the drive portion 8 that drives the binding portion 7, the contact switch portion 9, the trigger switch portion 12, and the like are housed in the main body portion 10.

[0095] Further, in the steel bar tying machine 1, the wire feeding section 3, the curl forming section 5, the cutting section 6, the tying section 7, each element constituting the driving section 8, the first abutting section 91a, the first moving member 92a, the first biasing member 93a, the detecting section 94, and the transmission member 95 constituting the contact switch section 9, the trigger switch section 12, and each element constituting the control section 100 are attached to one housing 14L constituting the main body section 10. Further, in the steel bar tying machine 1, the second abutting section 91b, the second moving member 92b, and the second biasing member 93b constituting the contact switch section 9 are attached to the other housing 14R constituting the main body section 10. Further, the one housing 14L and the other housing 14R are assembled into one body by screws or the like. Thus, the assembly of the steel bar tying machine 1 can be easily performed.

[0096] <Example of operation of steel bar tying machine of this embodiment>

[0097] Figure 7 is a main part side view showing an example of the operation of the steel bar tying machine of this embodiment, Figures 8A-8D is a plan view of the contact switch section showing an example of the operation of the steel bar tying machine of this embodiment, and then, the operation of starting the tying of the steel bar S by the wire W in the steel bar tying machine 1 of this embodiment will be described with reference to the drawings.

[0098] In a state where the steel bar S does not enter between the curl guide 50 and the induction guide 51, as shown in Figure 8A , the first abutting section 91a is moved by the biasing of the first biasing member 93a to an initial position P1 protruding forward from the end portion of the front side of the main body section 10, and the second abutting section 91b is moved by the biasing of the second biasing member 93b to the initial position P1 protruding forward from the end portion of the front side of the main body section 10. Thus, the movable member 94a of the detecting section 94 is not pressed, and both the first abutting section 91a and the second abutting section 91b are in a non-operational state.

[0099] In the non-operational state of both the first abutting section 91a and the second abutting section 91b, even if the trigger switch section 12 is operated, the control section 100 does not perform the tying operation.

[0100] As shown in Figure 7 , in the operation of the steel bar S entering between the curl guide 50 and the induction guide 51 of the curl forming section 5, the steel bar S contacts at least one of the first abutting section 91a and the second abutting section 91b on or near the extension line of the axis L of the rotational operation of the tying section 7.

[0101] In a case where the steel bar S and the steel bar tying machine 1 are relatively inclined in a direction in which the steel bar S approaches the first abutting section 91a, as shown in Figure 8B , the first abutting section 91a is pressed backward by the steel bar S, and the first moving member 92a moves in the backward direction.

[0102] When the first moving member 92a moves in the rearward direction, the transmission member 95 moves in the rearward direction together with the first moving member 92a, pressing the movable member 94a of the detection member 94. Also, by the first abutting member 91a moving from the initial position PI to the binding position P2, the movable member 94a is pressed by a predetermined amount, and the output of the detection member 94 changes, and the operation of the first abutting member 91a is detected by the detection member 94.

[0103] In the case where the reinforcing bar S and the reinforcing bar binding machine 1 are relatively inclined in the direction in which the reinforcing bar S approaches the second abutting member 91b, as shown in FIG. 6, the second abutting member 91b is pressed in the rearward direction by the reinforcing bar S, and the second moving member 92b moves in the rearward direction. Figure 8C

[0104] When the second moving member 92b moves in the rearward direction, the transmission member 95 rotates with the shaft 95a as a fulcrum while compressing the urging member 95b, pressing the movable member 94a of the detection member 94. Also, by the second abutting member 91b moving from the initial position PI to the binding position P2, the movable member 94a is pressed by a predetermined amount, and the output of the detection member 94 changes, and the operation of the second abutting member 91b is detected by the detection member 94.

[0105] In the case where the reinforcing bar S is substantially parallel with respect to the first abutting member 91a and the second abutting member 91b, as shown in FIG. 7, the first abutting member 91a is pressed in the rearward direction by the reinforcing bar S, and the first moving member 92a moves in the rearward direction, and the second abutting member 91b is pressed in the rearward direction by the reinforcing bar S, and the second moving member 92b moves in the rearward direction. Figure 8D

[0106] When the first moving member 92a and the second moving member 92b move in the rearward direction, the transmission member 95 moves in the rearward direction together with the first moving member 92a, pressing the movable member 94a of the detection member 94. Also, by the first abutting member 91a and the second abutting member 91b moving from the initial position PI to the binding position P2, the movable member 94a is pressed by a predetermined amount, and the output of the detection member 94 changes, and the operations of the first abutting member 91a and the second abutting member 91b are detected by the detection member 94.

[0107] ​​When at least one of the first abutting portion 91a and the second abutting portion 91b moves rearward by a predetermined amount in the state in which the trigger switch portion 12 is operated, the output of the detection portion 94 changes, and when the contact switch portion 9 is detected to be operated, the control portion 100 controls the motor 80 and a non-illustrated conveyance motor that drives the conveyance gear 30 to perform a binding operation. Alternatively, in the state in which the contact switch portion 9 is operated, when the trigger switch portion 12 is operated, the control portion 100 can perform the binding operation. Alternatively, the control portion 100 can perform the binding operation when the contact switch portion 9 is operated, and can be configured without the trigger switch portion 12.

[0108] When the binding operation is started, the non-illustrated conveyance motor is driven in the forward direction, and the wire W is conveyed by the wire conveyance portion 3 in the forward direction indicated by the arrow F0.

[0109] In the case of a configuration in which a plurality of (for example, two) wires W are used to bind the reinforcement S, the two wires W are conveyed in a state in which they are aligned in the axial direction of the loop Ru formed by the wires W by the wire guide 4.

[0110] The wire W that is conveyed in the forward direction is conveyed to the crimping guide 50 of the crimping formation portion 5 by the central hook 70C and the first side hook 70R. The wire W is crimped in a manner in which it is wound around the reinforcement S by the crimping guide 50.

[0111] The wire W that is crimped by the crimping guide 50 is induced toward the central hook 70C and the second side hook 70L by the induction guide 51 by being further conveyed in the forward direction by the wire conveyance portion 3. Furthermore, when the leading end of the wire W is conveyed to a predetermined position, the conveyance of the wire W in the forward direction is stopped.

[0112] After the conveyance of the wire W in the forward direction is stopped, the motor 80 is driven in the forward direction. The sleeve 71 moves in the forward direction, that is, the direction of the arrow Fl, in a range of action in which the wire W is caught by the wire catch 70.

[0113] When the sleeve 71 moves in the forward direction, the opening and closing pin 71a passes through the opening and closing guide hole 73. Thus, the first side hook 70R moves in a direction in which it approaches the central hook 70C by a rotational action about the shaft 71b. When the first side hook 70R is closed with respect to the central hook 70C, the wire W that is caught between the first side hook 70R and the central hook 70C is caught in a state in which it can move in the extending direction between the first side hook 70R and the central hook 70C.

[0114] Further, the second side hook 70L moves in a direction approaching the central hook 70C by a rotational movement with the shaft 71b as a fulcrum. When the second side hook 70L is closed with respect to the central hook 70C, the wire W caught between the second side hook 70L and the central hook 70C is caught in a state not to be released from between the second side hook 70L and the central hook 70C.

[0115] After the sleeve 71 is advanced to a position where the wire W is caught by the action of the first side hook 70R and the second side hook 70L being closed, the rotation of the motor 80 is temporarily stopped, and a non-illustrated conveyance motor is driven in a reverse direction.

[0116] Thus, the pair of conveyance gears 30 are reversed, and the wire W caught between the pair of conveyance gears 30 is conveyed in a reverse direction indicated by an arrow R0. Since the front end side of the wire W is caught in a state not to be released from between the second side hook 70L and the central hook 70C, the wire W is wound around the reinforcing bar S by the action of the wire W being conveyed in the reverse direction.

[0117] After the wire W is wound around the reinforcing bar S and the conveyance of the wire W in the reverse direction is stopped, the motor 80 is driven in a forward direction, whereby the sleeve 71 is further moved in a forward direction indicated by an arrow Fl.

[0118] The action of the sleeve 71 being moved in the forward direction is transmitted to the cutting portion 6 by the transmission mechanism 62, and the movable cutter portion 61 rotates, and the wire W caught by the first side hook 70R and the central hook 70C is cut by the action of the fixed cutter portion 60 and the movable cutter portion 61.

[0119] At substantially the same time as the wire W is cut by the sleeve 71 being moved in the forward direction indicated by the arrow Fl by the motor 80 being driven in the forward direction, the bent portions 71cl, 71c2 are moved in a direction approaching the reinforcing bar S. Thus, the front end side of the wire W caught between the central hook 70C and the second side hook 70L is pressed by the bent portion 71cl toward the reinforcing bar S side, and is bent toward the reinforcing bar S side.

[0120] Further, the terminal side of the wire W caught between the central hook 70C and the first side hook 70R and cut by the cutting portion 6 is pressed by the bent portion 71c2 toward the reinforcing bar S side, and is bent toward the reinforcing bar S side.

[0121] After the front end side and the terminal side of the wire W are bent toward the reinforcing bar S side, the sleeve 71 is further moved in the forward direction by the motor 80 being further driven in the forward direction. When the action region of the wire W caught by the wire catching body 70 is reached by the sleeve 71 being moved to a predetermined position, the sleeve 71 is rotated in conjunction with the rotation shaft 72, and the wire W caught by the wire catching body 70 is twisted.

[0122] When the load applied to the motor 80 is detected to become maximum by twisting the wire W, the forward rotation of the motor 80 is stopped. Then, by the motor 80 being driven in the reverse direction, the rotation shaft 72 is reversed, and the sleeve 71 is moved in the rear direction, i.e., the arrow Rl direction.

[0123] When the sleeve 71 is moved in the rear direction, the holding of the wire W is released. In addition, when the sleeve 71 is moved in the rear direction, the first side hook 70R is moved in a direction away from the central hook 70C, and the second side hook 70L is moved in a direction away from the central hook 70C. Thereby, the wire W is disengaged from the wire retaining body 70.

[0124] As explained above, in the operation in which the reinforcing bar S enters between the curl guide 50 and the induction guide 51 of the curl forming portion 5, the reinforcing bar S comes into contact with at least one of the first abutting portion 91a and the second abutting portion 91b on or near the extension line of the axis L of the rotation operation of the binding portion 7. And, when the contact switch portion 9 is detected to work by the reinforcing bar S being pressed by at least one of the first abutting portion 91a and the second abutting portion 91b and being moved in the rear direction, the binding operation is executed.

[0125] Thereby, the binding operation can be executed in a state in which the reinforcing bar S is located on or near the extension line of the axis L of the rotation operation of the binding portion 7. In addition, because the moving directions of the first abutting portion 91a and the second abutting portion 91b are the front-rear directions along the axis L of the rotation operation of the binding portion 7, even the operation of causing the contact switch portion 9 to work, the position of the reinforcing bar S can be inhibited from greatly deviating from on or near the extension line of the axis L of the rotation operation of the binding portion 7.

[0126] Therefore, the position at which the wire W is twisted can be inhibited from greatly deviating from the position of the reinforcing bar S, and the binding strength can be ensured.

Claims

1. A strapping machine, provided with a main body, the main body is provided with: a thread conveying section that conveys a thread wound around a strapping object; a strapping section that twists the thread wound around the strapping object by catching and rotating the thread; a curling guide that causes the thread conveyed by the thread conveying section to curl; an inducing guide that induces the thread curled by the curling guide to the strapping section; and a contact switch section that operates by being abutted by the strapping object, the curling guide and the inducing guide are provided at one end of the main body in a direction along an axis of a rotational movement of the strapping section, the contact switch section is provided with an abutting section that is abutted by the strapping object, the abutting section is provided between the curling guide and the inducing guide at at least one side in a direction orthogonal to the direction along which the curling guide and the inducing guide are arranged and the direction along the axis, a projection amount along the axis from the one end of the main body to a front end of the abutting section is shorter than at least one of a projection amount along the axis from the one end of the main body to a front end of the curling guide and a projection amount along the axis from the one end of the main body to a front end of the inducing guide, when the strapping object is abutted to the abutting section and the contact switch section operates, a strapping operation is performed, the abutting section is movable from a first position to a second position along the axis of the rotational movement of the strapping section, and the contact switch section operates when the abutting section is moved to the second position, the abutting section is provided with a first abutting section at one side in the direction orthogonal to the direction along which the curling guide and the inducing guide are arranged and the direction along the axis, and a second abutting section at the other side, the first abutting section and the second abutting section are independently movable, the strapping machine is provided with a detection section that detects whether the first abutting section and the second abutting section are moved, the strapping machine is provided with a transmission member that transmits the movement of the first abutting section and the second abutting section to a single detection section, the contact switch section has a first movable member that movably supports the first abutting section, and a second movable member that movably supports the second abutting section, the transmission member is attached to the first movable member and engaged with the second movable member.

2. The strapping machine according to claim 1, wherein the abutting section is movably attached to a housing that constitutes the main body.

3. The strapping machine according to claim 1, wherein the abutting section is linearly movable along the axis of the rotational movement of the strapping section.

4. The strapping machine according to claim 1, wherein the abutting section is rotationally movable along a circular arc centered on the axis of the rotational movement of the strapping section.

5. The strapping machine according to any one of claims 1 to 4, wherein The protrusion amount along the axis from one end of the main body portion to the front end of the abutting portion is made shorter than either one of the protrusion amount along the axis from one end of the main body portion to the front end of the curling guide and the protrusion amount along the axis from one end of the main body portion to the front end of the induction guide.

6. The strapping machine according to any one of claims 1 to 4, wherein, the strapping machine is provided with: a handle portion protruding from the main body portion; and a trigger switch portion that operates by an operation of a hand holding the handle portion, when the trigger switch portion operates and the contact switch portion operates, a strapping operation is performed.

Images