End machine

Abstract

To provide a binding machine that can secure binding strength.SOLUTION: A reinforcing-bar binding machine 1A comprises a wire feed part 3 for feeding wire W to be wound around a reinforcing-bar S, a binding part 7 for twisting the wire W that is wound around the reinforcing-bar S, a curl guide 50 for imparting a curling habit to the wire W fed by the wire feed part 3, an introducing guide 51 for introducing the wire W where the curling habit is imparted at the curl guide 50 to the binding part 7, and a contact switch part 9 that is actuated by abutting the reinforcing-bar S. The contact switch part 9 comprises an abutting part 91 to which the reinforcing-bar S is abutted. The abutting part 91 is located between the curl guide 50 and the introducing guide 51 and is provided on at least one side along the direction orthogonal to the direction in which the curl guide 50 and the introducing guide 51 are lined up relative to an axis line L of a rotating operation of the binding part 7 bound by locking the wire W and twisting the locked wire W.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a bundling machine that uses wire to bundle objects such as reinforcing bars. [Background technology]

[0002] BACKGROUND ART Conventionally, a binding machine known as a reinforcing bar binding machine has been proposed, which binds two or more reinforcing bars with wire by winding wire around the reinforcing bars and twisting the wire wound around the reinforcing bars.

[0003] The bundling machine winds the wire, driven by the driving force of a motor, around the rebar by passing it through a guide called a curl guide, etc., which curls the wire. This curled wire is then guided by a guide called an induction guide, etc., to a bundling section where the wire is twisted, and the wire wound around the rebar is twisted at the bundling section, thereby bundling the rebar with the wire.

[0004] In such binding machines, a binding machine has been proposed that not only is it operated by a trigger switch provided on the handle, but also performs the binding operation by detecting when a component called a contact component or the like has hit a component near the location where the reinforcing bar is installed, or the reinforcing bar.

[0005] In a configuration for detecting when a contact member has abutted against a component near a location where a rebar is installed, a portion of the contact member protrudes from a guide that protrudes forward, either a guide that curls the wire or a guide that guides the curled wire. A configuration has been proposed in which the tip of the guide abuts against a component near a location where a rebar is installed, thereby activating the contact member (see, for example, Patent Document 1).

[0006] In addition, in a configuration for detecting when a contact member has come into contact with a rebar, a guide that curls the wire or a guide that guides the curled wire is provided with a contact member that can move in a direction approaching the guide, and a configuration has been proposed in which the contact member is activated when the rebar comes into contact with the guide (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 2949703 [Patent Document 2] Patent No. 6887760 Summary of the Invention [Problem to be solved by the invention]

[0008] In a configuration in which the contact member is activated by butting the tip of the guide against a member near the location where the reinforcing bar is installed, the binding operation can be performed even if the distance between the reinforcing bar and the binding part that twists the reinforcing bar is great, which makes it easy for gaps to form between the reinforcing bar and the wire, weakening the binding force.

[0009] Furthermore, in a configuration in which the contact member is activated by butting the rebar against the guide, the position where the wire is twisted at the binding section is misaligned with the rebar, which can easily create a gap between the rebar and the wire, weakening the binding force.

[0010] The present invention has been made to solve such problems, and has an object to provide a binding machine that can ensure binding strength. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems, the present invention provides: a main body; a wire feeding unit that feeds the wire to be wound around the object to be bound; The wire fed by the wire feed unit is locked and twisted. Twist the wire wrapped around the bundle united byA binding part, provided at one end of the main body, a curl guide that curls the wire fed by the wire feeding unit; provided at one end of the main body, a guide that guides the wire that has been curled by the curl guide to the bundling part; The first abutting section and the second abutting section are located between the curl guide and the guiding guide and move when the object to be bound is abutted against them. The first abutting section is provided on one side of the axis of the rotational movement of the binding section along a direction perpendicular to the direction in which the curl guide and the guiding guide are aligned, and is movable from a first position to a second position along the axis of the rotational movement of the binding section. The second abutting section is provided on the other side of the axis of the rotational movement of the binding section along a direction perpendicular to the direction in which the curl guide and the guiding guide are aligned, and is movable from the first position to the second position independently of the first abutting section. The device is activated when at least one of the first abutting section and the second abutting section moves to the second position. Contact switch section a detection unit that detects that at least one of the first abutting unit and the second abutting unit has moved; a transmission member that transmits the movement of the first abutting unit and / or the second abutting unit to the single detection unit; and a control unit that controls the driving of the binding unit. The length of protrusion from one end of the main body to the front end position of the abutting part along the axis of the rotational movement of the binding part is teeth , configured to be shorter than the protrusion amount from one end of the main body portion to the front end position of the curl guide and the guiding guide along the axis of the rotational movement of the binding portion, The control unit is configured to detect whether the first abutting portion or / and the second abutting portion are moving. When the contact switch is activated, the binding operation is performed. Control the binding part so that It is a binding machine.

[0012] In the present invention, when the object to be bound is abutted against the abutting portion, the contact switch portion is activated and the binding operation is carried out. [Effects of the Invention]

[0013] In the present invention, the bundling operation can be performed with the object to be bound positioned on or near the extension of the axis of rotation of the bundling unit. Furthermore, the abutting portion does not protrude beyond the curl guide and the guiding guide. This prevents a structure located further forward than the curl guide and the guiding guide from coming into contact with the abutting portion and activating the contact switch. The bundling operation can be performed with the object to be bound positioned on or near the extension of the axis of rotation of the bundling unit. This prevents a large misalignment between the position where the wire is twisted and the position of the object to be bound, ensuring bundling strength. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a diagram showing an internal configuration of an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention, viewed from the side. [Figure 2A] 1 is a side view showing an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention. [Figure 2B] 1 is a side view showing an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention. [Figure 2C]1 is a front view showing an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention. [Figure 2D] 1 is a top view showing an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention. [Figure 3A] 1 is a diagram showing an internal configuration of an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention, viewed from the side. [Figure 3B] FIG. 3B is a cross-sectional view taken along line AA in FIG. 3A. [Figure 3C] FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A. [Figure 4A] 1 is a perspective view showing an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention. [Figure 4B] FIG. 4B is a cross-sectional view of the main part taken along line CC in FIG. 4A. [Figure 5A] FIG. 2 is a perspective view showing an example of a contact switch unit according to the present embodiment. [Figure 5B] FIG. 2 is a top view showing an example of a contact switch unit according to the present embodiment. [Figure 5C] FIG. 2 is a side view showing an example of a contact switch unit according to the present embodiment. [Figure 5D] FIG. 2 is a side view showing an example of a contact switch unit according to the present embodiment. [Figure 5E] FIG. 2 is a front view showing an example of a contact switch unit according to the present embodiment. [Figure 6A] 1 is a side view of a main portion showing an example of a mounting structure for a contact switch unit according to an embodiment of the present invention; [Figure 6B] 1 is a side view of a main portion showing an example of a mounting structure for a contact switch unit according to an embodiment of the present invention; [Figure 7] FIG. 2 is a side view of a main part showing an example of the operation of the reinforcing bar binding machine of the present embodiment. [Figure 8A] 10 is a top view of the contact switch unit showing an example of the operation of the reinforcing bar binding machine of the present embodiment. FIG. [Figure 8B] 10 is a top view of the contact switch unit showing an example of the operation of the reinforcing bar binding machine of the present embodiment. FIG. [Figure 8C] 10 is a top view of the contact switch unit showing an example of the operation of the reinforcing bar binding machine of the present embodiment. FIG. [Figure 8D] 10 is a top view of the contact switch unit showing an example of the operation of the reinforcing bar binding machine of the present embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an example of a reinforcing bar binding machine as an embodiment of the binding machine of the present invention will be described with reference to the drawings.

[0016] <Configuration example of the reinforcing bar binding machine according to this embodiment> Fig. 1 is a diagram showing an internal configuration as seen from the side, showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment. Also, Figs. 2A and 2B are side views showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment, 2C is a front view showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment, and Fig. 2D is a top view showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment.

[0017] Furthermore, Fig. 3A is a diagram showing an internal configuration as seen from the side, showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment, Fig. 3B and Fig. 3C are cross-sectional views as seen from above, showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment, Fig. 3B is a cross-sectional view taken along line AA in Fig. 3A, and Fig. 3C is a cross-sectional view taken along line BB in Fig. 3A. Furthermore, Fig. 4A is a perspective view showing an example of the overall configuration of a reinforcing bar binding machine of this embodiment, and Fig. 4B is a cross-sectional view taken along line CC of a main part in Fig. 4A.

[0018] The rebar binding machine 1A feeds the wire W in the forward direction indicated by the arrow F0, winding it around the rebar S to be bound, and then feeds the wire W wound around the rebar S in the reverse direction indicated by the arrow R0, winding it around the rebar S and cutting it, and then twists the wire W and binds the rebar S with the wire W.

[0019] To achieve the above-mentioned functions, the rebar binding machine 1A is equipped with a magazine 2 that stores the wire W and a wire feeding unit 3 that feeds the wire W. The rebar binding machine 1A also has a curl forming unit 5 that forms a path for winding the wire W fed by the wire feeding unit 3 around the rebar S, and a cutting unit 6 that cuts the wire W wound around the rebar S. The rebar binding machine 1A is further equipped with a binding unit 7 that twists the wire W wound around the rebar S, and a drive unit 8 that drives the binding unit 7.

[0020] The reinforcing bar binding machine 1A is designed to be held by the operator and includes a main body 10 and a handle 11.

[0021] The rebar tying machine 1A includes a trigger switch unit 12 that is activated by operation of a hand gripping a handle unit 11, and a contact switch unit 9 that is activated when a rebar S is butted against it. The rebar tying machine 1A performs a binding operation when both the trigger switch unit 12 and the contact switch unit 9 are activated. The rebar tying machine 1A may perform a binding operation when the contact switch unit 9 is activated with the trigger switch unit 12 activated. The rebar tying machine 1A may also perform a binding operation when the trigger switch unit 12 is activated with the contact switch unit 9 activated. Furthermore, the rebar tying machine 1A may perform a binding operation when the contact switch unit 9 is activated, or may not be configured to include a trigger switch unit 12.

[0022] The magazine 2 is an example of a storage section, and rotatably and detachably stores a reel 20 around which a long wire W is wound so as to be able to be unwound. The wire W is a wire made of a metal wire that can be plastically deformed, a metal wire coated with resin, or a twisted wire.

[0023] The wire feeding unit 3 includes a pair of feed gears 30 that clamp and feed one wire W or multiple parallel wires W, and a feed motor (not shown) that drives the feed gear 30. The wire feeding unit 3 rotates the feed gear 30 when the rotational motion of the feed motor is transmitted via a transmission mechanism.

[0024] The wire feeding unit 3 feeds the wire W held between a pair of feed gears 30 along the extending direction of the wire W. In a configuration in which a plurality of wires W, for example, two wires W, are fed, the two wires W are fed in a parallel state.

[0025] The wire feed unit 3 switches the rotation direction of the feed motor between forward and reverse, thereby switching the rotation direction of the feed gear 30 and switching the feed direction of the wire W between one direction, which is the forward direction, and another direction, which is the reverse direction, which is opposite to the one direction.

[0026] The wire guides 4 are provided at predetermined positions upstream and downstream of the wire feeding unit 3 with respect to the feeding direction in which the wire W is fed in the forward direction. In a configuration in which two wires W are fed, the wire guides 4 regulate the radial orientation of the two wires W, align the two incoming wires W in parallel, and guide them between a pair of feed gears 30.

[0027] The curl forming unit 5 includes a curl guide 50 that curls the wire W fed by the wire feeding unit 3, and an guiding guide 51 that guides the wire W curled by the curl guide 50 to the bundling unit 7. In the rebar bundling machine 1A, the path of the wire W fed by the wire feeding unit 3 is regulated by the curl forming unit 5, so that the trajectory of the wire W forms a loop Ru as shown by the two-dot chain line in Figure 1, and the wire W is wound around the rebar S.

[0028] The cutting unit 6 includes a fixed blade unit 60, a movable blade unit 61 that cuts the wire W in cooperation with the fixed blade unit 60, and a transmission mechanism 62 that transmits the operation of the binding unit 7 to the movable blade unit 61. The cutting unit 6 cuts the wire W by the rotational operation of the movable blade unit 61 with the fixed blade unit 60 as a fulcrum axis.

[0029] The bundling unit 7 includes a wire locking body 70 to which the wire W is locked, and a rotating shaft 72 that operates the wire locking body 70. The driving unit 8 includes a motor 80 and a reducer 81 that reduces speed and amplifies torque. The bundling unit 7 and the driving unit 8 are connected by the rotating shaft 72 and the motor 80 via the reducer 81, and the rotating shaft 72 is driven by the motor 80 via the reducer 81.

[0030] The wire locking body 70 comprises a center hook 70C connected to a rotating shaft 72, a first side hook 70R and a second side hook 70L that open and close relative to the center hook 70C, and a sleeve 71 that activates the first side hook 70R and the second side hook 70L in conjunction with the rotational movement of the rotating shaft 72.

[0031] In the binding part 7, the side where the center hook 70C, the first side hook 70R, and the second side hook 70L are provided is the front side, and the side where the rotation shaft 72 is connected to the reducer 81 is the rear side.

[0032] The center hook 70C is connected to the front end, which is one end of the rotary shaft 72, via a structure that allows the center hook 70C to rotate relative to the rotary shaft 72 and move integrally with the rotary shaft 72 in the axial direction.

[0033] The first side hook 70R has a tip end, which is one end along the axial direction of the rotating shaft 72, located on one side of the center hook 70C. The first side hook 70R has a rear end, which is the other end along the axial direction of the rotating shaft 72, rotatably supported by the center hook 70C via a shaft 71b.

[0034] The second side hook 70L has a tip end, which is one end along the axial direction of the rotation shaft 72, located on the other side of the center hook 70C. The second side hook 70L has a rear end, which is the other end along the axial direction of the rotation shaft 72, rotatably supported by the center hook 70C via a shaft 71b.

[0035] As a result, the wire locking body 70 rotates about the shaft 71b, opening and closing the tip of the first side hook 70R in the direction of approaching and separating from the center hook 70C. Also, the tip of the second side hook 70L opens and closes in the direction of approaching and separating from the center hook 70C.

[0036] The sleeve 71 is cylindrical and covers the periphery of the rotary shaft 72. The sleeve 71 has a convex portion (not shown) that protrudes from the inner circumferential surface of the cylindrical space into which the rotary shaft 72 is inserted, and this convex portion fits into a groove of a feed screw 72a that is formed along the axial direction on the outer periphery of the rotary shaft 72. When the rotary shaft 72 rotates, the sleeve 71 moves back and forth, which is the direction along the axial direction of the rotary shaft 72, according to the rotation direction of the rotary shaft 72, due to the action of the convex portion (not shown) and the feed screw 72a of the rotary shaft 72. The sleeve 71 also rotates integrally with the rotary shaft 72.

[0037] The sleeve 71 includes an opening / closing pin 71a that opens and closes the first side hook 70R and the second side hook 70L.

[0038] The opening / closing pin 71a is inserted into an opening / closing guide hole 73 provided in the first side hook 70R and the second side hook 70L. The opening / closing guide hole 73 extends along the movement direction of the sleeve 71 and has a shape that converts the linear movement of the opening / closing pin 71a, which moves in conjunction with the sleeve 71, into an opening / closing operation due to rotation of the first side hook 70R and the second side hook 70L about the shaft 71b as a fulcrum.

[0039] As the sleeve 71 of the wire locking body 70 moves in the rearward direction indicated by the arrow R1, the first side hook 70R and the second side hook 70L move in a direction away from the center hook 70C by rotating around the axis 71b, depending on the trajectory of the opening / closing pin 71a and the shape of the opening / closing guide hole 73.

[0040] This causes the first side hook 70R and the second side hook 70L to open relative to the center hook 70C, and a feed path through which the wire W passes is formed between the first side hook 70R and the center hook 70C, and between the second side hook 70L and the center hook 70C.

[0041] When the sleeve 71 moves to a non-rotating region and the first side hook 70R and the second side hook 70L are open relative to the center hook 70C, the wire W fed by the wire feeding unit 3 passes between the center hook 70C and the first side hook 70R. The wire W passing between the center hook 70C and the first side hook 70R is guided to the curl forming unit 5. The wire W is then curled by the curl forming unit 5 and guided to the bundling unit 7, where it passes between the center hook 70C and the second side hook 70L.

[0042] In the wire locking body 70, as the sleeve 71 moves forward as indicated by the arrow F1, the first side hook 70R and the second side hook 70L move in a direction approaching the center hook 70C by rotating about the shaft 71b due to the trajectory of the opening / closing pin 71a and the shape of the opening / closing guide hole 73. As a result, the first side hook 70R and the second side hook 70L close against the center hook 70C.

[0043] When the first side hook 70R closes relative to the center hook 70C, the wire W sandwiched between the first side hook 70R and the center hook 70C is locked in a manner that allows it to move along the extension direction between the first side hook 70R and the center hook 70C. Furthermore, when the second side hook 70L closes relative to the center hook 70C, the wire W sandwiched between the second side hook 70L and the center hook 70C is locked in a manner that prevents it from slipping out from between the second side hook 70L and the center hook 70C.

[0044] The wire locking body 70 includes a bending portion 71c1 that presses and bends the tip side, which is one end of the wire W, in a predetermined direction to form the wire W into a predetermined shape. The wire locking body 70 also includes a bending portion 71c2 that presses and bends the terminal side, which is the other end of the wire W cut by the cutting portion 6, in a predetermined direction to form the wire W into a predetermined shape.

[0045] The sleeve 71 has a shape in which the forward end indicated by the arrow F1 is divided into two parts, sandwiched between the first side hook 70R, the second side hook 70L, and the center hook 70C, and a bent portion 71c1 is formed at the forward end located on the upper side in the non-rotating area, and a bent portion 71c2 is formed at the forward end located on the lower side.

[0046] After the wire W is cut at the cutting portion 6, the sleeve 71 further moves forward as indicated by the arrow F1, thereby pushing the tip end of the wire W, which is held by the center hook 70C and the second side hook 70L, with the bending portion 71c1, and bending it toward the reinforcing bar S. Additionally, the sleeve 71 pushes the end end of the wire W, which is held by the center hook 70C and the first side hook 70R and cut at the cutting portion 6, with the bending portion 71c2, and bending it toward the reinforcing bar S.

[0047] After the tip and end of the wire W are bent toward the reinforcing bar S, when the sleeve 71 moves further forward, the sleeve 71 rotates in conjunction with the rotating shaft 72, and the wire W locked by the wire locking body 70 is twisted.

[0048] The rotating shaft 72 is connected at its other end, i.e., its rear end, to the reducer 81 via a connecting portion 72b configured to rotate integrally with the reducer 81 and to move axially relative to the reducer 81. The connecting portion 72b is equipped with a spring 72c that urges the rotating shaft 72 rearward, i.e., in a direction toward the reducer 81, and restricts the position of the rotating shaft 72 along the axial direction. As a result, the rotating shaft 72 is configured to be movable forward, i.e., in a direction away from the reducer 81, while receiving a force pushing it rearward by the spring 72c. Therefore, when a force is applied to move the wire locking body 70 forward along the axial direction during the operation of binding the reinforcing bar S with the wire W, the rotating shaft 72 moves forward while receiving a force pushing it rearward by the spring 72c, thereby enabling the wire W to be bound so as to come into close contact with the reinforcing bar S.

[0049] In the rebar binding machine 1A, the curl guide 50 and the induction guide 51 of the curl forming unit 5 described above are provided at the front end of the main body 10, which is one side along the axial direction of the rotation shaft 72.

[0050] Fig. 5A is a perspective view showing an example of the contact switch unit of this embodiment, Fig. 5B is a top view showing an example of the contact switch unit of this embodiment, Figs. 5C and 5D are side views showing an example of the contact switch unit of this embodiment, Fig. 5E is a front view showing an example of the contact switch unit of this embodiment, and Figs. 6A and 6B are side views of essential parts showing an example of the mounting structure of the contact switch unit of this embodiment.

[0051] The contact switch unit 9 has a pair of abutting portions 91 (a first abutting portion 91a and a second abutting portion 91b) against which the reinforcing bar S abuts. The abutting portions 91 are provided at the front end of the main body 10, between the curl guide 50 and the guide 51, so that the abutting portions 91 do not protrude beyond the front end position PF of the guide 51, which has a small protrusion amount from the main body 10, so that the reinforcing bar S inserted between the curl guide 50 and the guide 51 abuts against the abutting portions 91.

[0052] The abutment portion 91 is provided on at least one side along the direction of arrows L2 and R2, which is the left-right direction perpendicular to the direction in which the curl guide 50 and the guiding guide 51 are aligned, with respect to the axis L of the rotational movement of the binding portion 7, which locks the wire W and binds the locked wire W by rotating and twisting the wire locking body 70, i.e., an extension of the axial center of the rotation shaft 72. In this example, a first abutment portion 91a is provided on one side (left side as viewed from the front) along the direction of arrows L2 and R2, and a second abutment portion 91b is provided on the other side (right side as viewed from the front).

[0053] The first abutment portion 91a and the second abutment portion 91b extend along the direction in which the curl guide 50 and the guiding guide 51 are aligned, and the reinforcing bar S inserted into the curl guide 50 and the guiding guide 51 can come into contact with at least one of the first abutment portion 91a and the second abutment portion 91b on the extension line of the axis L of the rotational movement of the binding portion 7.

[0054] In addition, the abutment portion 91 (first abutment portion 91a, second abutment portion 92b) is configured so that the protrusion amount L11 from the front end position PF1, which is one end of the main body portion 10, to the front end position PF2 protruding along the axis L is shorter than the protrusion amount L12 from the front end position PF1 of the main body portion 10 to the front end position PF of the curl guide 50 and the induction guide 51 protruding along the axis L.

[0055] In this example, of the curl guide 50 and the induction guide 51, the induction guide 51 has a smaller protrusion amount from the front end position PF1 of the main body 10. Therefore, the abutting portion 91 (first abutting portion 91a, second abutting portion 92b) is configured such that the protrusion amount L11 of the maximally protruding portion among the portions protruding from the front end position PF1 of the main body 10 along the axis L is shorter than the protrusion amount L12 from the front end position PF1 of the main body 10 to the front end position PF of the induction guide 51 protruding along the axis L.

[0056] As a result, the front end position PF2 of the abutting portion 91 (first abutting portion 91a, second abutting portion 92b) protruding along the axis L does not protrude beyond the front end position PF of the guide 51, which protrudes the least amount from the main body 10, of the curl guide 50 and the guide 51. This prevents a structure located further forward than the front end positions of the curl guide 50 and the guide 51 from coming into contact with the abutting portion 91 and activating the abutting portion 91.

[0057] The contact switch unit 9 includes a pair of moving members 92 (first moving member 92a, second moving member 92b) that support the first abutting portion 91a and the second abutting portion 91b so that they can move independently in the front-to-rear direction along the axis L of the rotational movement of the binding unit 7. The contact switch unit 9 also includes a pair of biasing members 93 (first biasing member 93a, second biasing member 93b) that independently bias the first abutting portion 91a and the second abutting portion 91b in the front direction.

[0058] The main body 10 is configured such that one case 14L and the other case 14R, which are divided into left and right halves when viewed from the front, are assembled together with screws or the like. The first abutment portion 91a is attached to one case 14L constituting the main body 10 via a first moving member 92a. The case 14L has a support portion 16L at its front end that supports the first moving member 92a so that it can move in the front-to-rear direction. The first moving member 92a, to which the first abutment portion 91a is attached, is supported by the support portion 16L of the case 14L in a state where it can move in the front-to-rear direction. As a result, the first abutment portion 91a is supported at the front end of the main body 10 so that it can move linearly along the axis L of the rotational movement of the binding unit 7.

[0059] The first biasing member 93a is formed of, for example, a coil spring, and biases the first moving member 92a, which is supported on the support portion 16L of the case 104L in a state where it can move in the front-rear direction, in a forward direction. As a result, the first abutting portion 91a is biased in a direction that protrudes forward from the front end of the main body portion 10. Furthermore, when the first abutting portion 91a receives a force pressing it backward, it moves backward while compressing the first biasing member 93a.

[0060] The first abutting portion 91a is biased by the first biasing member 93a to protrude forward from the front end of the main body 10, and this first position is referred to as an initial position P1. The first abutting portion 91a moves rearward a predetermined amount while compressing the first biasing member 93a, and this second position is referred to as a binding position P2.

[0061] The second abutment portion 91b is attached to the other case 14R constituting the main body 10 via a second moving member 92b. The case 14R has a support portion 16R at its front end that supports the second moving member 92b so that it can move in the front-to-rear direction. The second moving member 92b to which the second abutment portion 91b is attached is supported by the support portion 16R of the case 14R in a state where it can move in the front-to-rear direction. As a result, the second abutment portion 91b is supported at the front end of the main body 10 so that it can move in a linear direction independently of the first abutment portion 91a.

[0062] The second biasing member 93b is formed, for example, by a coil spring, and biases the second moving member 92b, which is supported on the support portion 16R of the case 4R in a state in which it can move in the front-rear direction, in a forward direction. As a result, the second abutting portion 91b is biased in a direction in which it protrudes forward from the front end of the main body portion 10 independently of the first abutting portion 91a. When the second abutting portion 91b receives a force pressing it backward, it moves backward while compressing the second biasing member 93b.

[0063] The second abutting portion 91b is biased by the second biasing member 93b and protrudes forward from the front end of the main body 10 to a first position called an initial position P1. The second abutting portion 91b moves rearward a predetermined amount while compressing the second biasing member 93b to a second position called a binding position P2.

[0064] The contact switch unit 9 includes a detection unit 94 that detects whether the first abutting member 91a and the second abutting member 91b are operating or not, and a transmission member 95 that transmits the movement of the first abutting member 91a and the second abutting member 91b to the detection unit 94.

[0065] The detection unit 94 is configured, for example, by a switch called a microswitch, and its output changes when its mover 94a is pressed a predetermined amount. The detection unit 94 is attached to one of the cases 14R with the mover 94a moving in the forward and backward directions. The detection unit 94 may be a switch or sensor other than a microswitch, or may be a non-contact sensor such as a hall sensor or optical sensor.

[0066] The transmission member 95 is rotatably attached via a shaft 95a to the first moving member 92a, to which the first abutting member 91a is attached. The transmission member 95 moves in the front-to-rear direction together with the first moving member 92a, and is displaced relative to the first moving member 92a by rotation about the shaft 95a. The end of the transmission member 95 opposite to the end displaced by rotation about the shaft 95a faces the movable element 94a of the detection unit 94.

[0067] The end of the transmission member 95 opposite the side supported by the shaft 95a engages with the second moving member 92b to which the second abutting member 91b is attached. The transmission member 95 is biased by a biasing member 95b such as a coil spring in a direction in which the end of the transmission member 95 opposite the side supported by the shaft 95a is pressed against the second moving member 92b.

[0068] As a result, when the first abutting portion 91a is pushed rearward and the first moving member 92a moves rearward, the transmission member 95 moves rearward together with the first moving member 92a and pushes the movable element 94a of the detection portion 94.

[0069] Furthermore, when the second abutment portion 91b is pushed rearward and the second support member 92b moves rearward, the transmission member 95 rotates about the shaft 95a as a fulcrum while compressing the biasing member 95b, and pushes the movable element 94a of the detection portion 94.

[0070] In addition, the first abutment portion 91a and the second abutment portion 91b may be configured to move by rotational movement so that the movement direction of the first abutment portion 91a and the second abutment portion 91b describes an arc in the front-to-back direction along the axis L of the rotational movement of the binding portion 7.

[0071] The trigger switch unit 12 is provided with a trigger 13a that can be displaced back and forth by the movement of a finger on the front side, which is one side of the handle unit 11 that is gripped by hand. The trigger switch unit 12 also has a switch 13b inside the handle unit 11 that detects whether the trigger 13a is activated or not.

[0072] The rebar tying machine 1A includes a control unit 100 that executes a bundling operation depending on whether or not the contact switch unit 9 and the trigger switch unit 12 are activated. When the trigger switch unit 12 and the contact switch unit 9 are activated, the control unit 100 controls a feed motor (not shown) that drives the motor 80 and the feed gear 30 to execute the bundling operation. When the contact switch unit 9 is activated with the trigger switch unit 12 activated, the control unit 100 executes the bundling operation. Note that the control unit 100 may also execute the bundling operation when the trigger switch unit 12 is activated with the contact switch unit 9 activated. Furthermore, the control unit 100 may execute the bundling operation when the contact switch unit 9 is activated, or may not be configured to include the trigger switch unit 12.

[0073] In the rebar tying machine 1A, a handle 11 extends downward from a main body 10. A battery 15 is detachably attached to the bottom of the handle 11. Furthermore, in the rebar tying machine 1A, a magazine 2 is provided in front of the handle 11. In the rebar tying machine 1A, the above-mentioned wire feeding unit 3, cutting unit 6, binding unit 7, drive unit 8 that drives the binding unit 7, contact switch unit 9, trigger switch unit 12, etc. are stored in the main body 10.

[0074] In addition, in the rebar binding machine 1A, the elements constituting the wire feeding unit 3, curl forming unit 5, cutting unit 6, binding unit 7, and drive unit 8, the first abutting unit 91a, first moving member 92a, first biasing member 93a, detection unit 94, and transmission member 95 constituting the contact switch unit 9, and the elements constituting the trigger switch unit 12 and control unit 100 are attached to one case 14L constituting the main body 10. In addition, in the rebar binding machine 1A, the second abutting unit 91b, second moving member 92b, and second biasing member 93b constituting the contact switch unit 9 are attached to the other case 14R constituting the main body 10. Then, the one case 14L and the other case 14R are assembled together with screws or the like. This facilitates assembly of the rebar binding machine 1A.

[0075] <Example of operation of the reinforcing bar binding machine according to this embodiment> Figure 7 is a side view of the main parts showing an example of the operation of the reinforcing bar binding machine of this embodiment, and Figures 8A to 8D are top views of the contact switch section showing an example of the operation of the reinforcing bar binding machine of this embodiment.Next, with reference to each figure, we will explain the operation of starting to bind reinforcing bar S with wire W in the reinforcing bar binding machine 1A of this embodiment.

[0076] 8A, when the reinforcing bar S is not inserted between the curl guide 50 and the guiding guide 51, the first abutting portion 91a is biased by the first biasing member 93a to move to an initial position P1 protruding forward from the front end of the main body 10, and the second abutting portion 91b is biased by the second biasing member 93b to move to the initial position P1 protruding forward from the front end of the main body 10. As a result, the movable element 94a of the detection unit 94 is not pressed, and both the first abutting portion 91a and the second abutting portion 91b are in an inactive state.

[0077] When neither the first abutting portion 91a nor the second abutting portion 91b is in an inoperative state, the control portion 100 does not execute the bundling operation even if the trigger switch portion 12A is activated.

[0078] As shown in Figure 7, when the reinforcing bar S is inserted between the curl guide 50 and the guiding guide 51 of the curl forming section 5, the reinforcing bar S comes into contact with at least one of the first abutment section 91a and the second abutment section 91b on or near the extension of the axis L of the rotational movement of the binding section 7.

[0079] When the reinforcing bar S and the reinforcing bar binding machine 1A are inclined relatively in the direction in which the reinforcing bar S approaches the first abutment portion 91a, as shown in Figure 8B, the first abutment portion 91a is pushed backward by the reinforcing bar S, and the first moving member 92a moves backward.

[0080] When the first moving member 92a moves rearward, the transmission member 95 moves rearward together with the first moving member 92a and presses the movable element 94a of the detection unit 94. Then, when the first abutting portion 91a moves from the initial position P1 to the binding position P2, the movable element 94a is pressed by a predetermined amount, which changes the output of the detection unit 94, and the detection unit 94 detects that the first abutting portion 91a has been activated.

[0081] When the reinforcing bar S and the reinforcing bar binding machine 1A are inclined relatively in the direction in which the reinforcing bar S approaches the second abutment portion 91b, as shown in Figure 8C, the second abutment portion 91b is pushed backward by the reinforcing bar S, and the second moving member 92b moves backward.

[0082] When the second support member 92b moves rearward, the transmission member 95 rotates about the shaft 95a as a fulcrum while compressing the biasing member 95b, and presses the movable element 94a of the detection unit 94. Then, when the second abutting portion 91b moves from the initial position P1 to the binding position P2, the movable element 94a is pressed by a predetermined amount, which changes the output of the detection unit 94, and the detection unit 94 detects that the second abutting portion 91b has been activated.

[0083] When the reinforcing bar S is approximately parallel to the first abutment portion 91a and the second abutment portion 91b, as shown in Figure 8D, the reinforcing bar S pushes the first abutment portion 91a backward, causing the first moving member 92a to move backward, and the second abutment portion 91b is pushed backward, causing the second moving member 92b to move backward.

[0084] When the first moving member 92a and the second moving member 92b move rearward, the transmission member 95 moves rearward together with the first moving member 92a and presses the movable element 94a of the detection unit 94. Then, when the first abutting portion 91a and the second abutting portion 91b move from the initial position P1 to the binding position P2, the movable element 94a is pressed by a predetermined amount, causing a change in the output of the detection unit 94, and the detection unit 94 detects that the first abutting portion 91a and the second abutting portion 91b have been activated.

[0085] When the trigger switch unit 12 is activated and at least one of the first abutting unit 91a and the second abutting unit 91b moves rearward a predetermined amount, the output of the detection unit 94 changes, and the control unit 100 detects that the contact switch unit 9 has been activated, the control unit 100 controls the motor 80 and the feed motor (not shown) that drives the feed gear 30 to perform the bundling operation. Note that the control unit 100 may also perform the bundling operation when the trigger switch unit 12 is activated while the contact switch unit 9 is activated. Alternatively, the control unit 100 may perform the bundling operation when the contact switch unit 9 is activated, or may not be provided with the trigger switch unit 12.

[0086] When the bundling operation is started, a feed motor (not shown) is driven in the forward rotation direction, and the wire feed unit 3 feeds the wire W in the forward direction indicated by the arrow F0.

[0087] In the case of a configuration in which reinforcing bars S are bound using multiple wires W, for example, two wires W, the two wires W are fed by a wire guide 4 in a parallel state along the axial direction of the loop Ru formed by the wires W.

[0088] The wire W fed in the forward direction passes between the center hook 70C and the first side hook 70R and is fed to the curl guide 50 of the curl forming unit 5. By passing through the curl guide 50, the wire W is given a curl that wraps around the reinforcing bar S.

[0089] The wire W having been curled by the curl guide 50 is guided by the induction guide 51 and further fed in the forward direction by the wire feed unit 3, whereby the wire W is guided between the center hook 70C and the second side hook 70L by the induction guide 51. Then, when the tip of the wire W is fed to a predetermined position, the feeding of the wire W in the forward direction is stopped.

[0090] After the forward feeding of the wire W is stopped, the motor 80 is driven in the forward direction. The sleeve 71 moves forward in the direction of arrow F1 in the operating range where the wire W is locked by the wire locking body 70.

[0091] When the sleeve 71 moves forward, the opening / closing pin 71a passes through the opening / closing guide hole 73. As a result, the first side hook 70R rotates around the shaft 71b as a fulcrum and moves in a direction approaching the center hook 70C. When the first side hook 70R closes against the center hook 70C, the wire W sandwiched between the first side hook 70R and the center hook 70C is locked in a manner that allows it to move between the first side hook 70R and the center hook 70C along the extension direction.

[0092] Additionally, the second side hook 70L rotates around the shaft 71b as a fulcrum, moving in a direction toward the center hook 70C. When the second side hook 70L closes against the center hook 70C, the wire W sandwiched between the second side hook 70L and the center hook 70C is locked in a manner that prevents it from slipping out from between the second side hook 70L and the center hook 70C.

[0093] After the sleeve 71 is advanced to a position where the first side hook 70R and the second side hook 70L close to lock the wire W, the rotation of the motor 80 is temporarily stopped and the feed motor (not shown) is driven in the reverse direction.

[0094] As a result, the pair of feed gears 30 rotate in the reverse direction, and the wire W held between the pair of feed gears 30 is fed in the reverse direction indicated by the arrow R0. Because the tip end of the wire W is locked between the second side hook 70L and the center hook 70C in a manner that prevents it from slipping out, the wire W is wound around the reinforcing bar S by feeding the wire W in the reverse direction.

[0095] After the wire W is wound around the reinforcing bar S and the reverse feeding of the wire W is stopped, the motor 80 is driven in the forward rotation direction to further move the sleeve 71 forward as indicated by the arrow F1.

[0096] The forward movement of the sleeve 71 is transmitted to the cutting section 6 by the transmission mechanism 62, causing the movable blade section 61 to rotate, and the wire W engaged by the first side hook 70R and the center hook 70C is cut by the action of the fixed blade section 60 and the movable blade section 61.

[0097] By driving the motor 80 in the forward rotation direction, the sleeve 71 moves forward as indicated by the arrow F1 to cut the wire W, and almost simultaneously, the bending portions 71c1 and 71c2 move in a direction approaching the rebar S. As a result, the tip side of the wire W, which is engaged between the center hook 70C and the second side hook 70L, is pressed toward the rebar S by the bending portion 71c1 and bent toward the rebar S.

[0098] Furthermore, the end of the wire W that is engaged between the center hook 70C and the first side hook 70R and cut at the cutting portion 6 is pressed toward the reinforcing bar S by the bending portion 71c2 and bent toward the reinforcing bar S.

[0099] After the leading end and trailing end of the wire W are bent toward the rebar S, the motor 80 is further driven in the forward rotation direction, causing the sleeve 71 to move further forward. When the sleeve 71 moves to a predetermined position and reaches the operating range for twisting the wire W locked by the wire locking body 70, the sleeve 71 rotates in conjunction with the rotating shaft 72, and the wire W locked by the wire locking body 70 is twisted.

[0100] When it is detected that the load on the motor 80 has reached a maximum due to twisting the wire W, the forward rotation of the motor 80 is stopped. Next, the motor 80 is driven in the reverse rotation direction, causing the rotating shaft 72 to rotate in the reverse direction, and the sleeve 71 to move backward, in the direction of arrow R1.

[0101] When the sleeve 71 moves rearward, it releases the wire W from its hold. Furthermore, when the sleeve 71 moves rearward, the first side hook 70R moves in a direction away from the center hook 70C, and the second side hook 70L moves in a direction away from the center hook 70C. This causes the wire W to come out of the wire locking body 70.

[0102] As explained above, when the reinforcing bar S is inserted between the curl guide 50 and the guiding guide 51 of the curl forming unit 5, the reinforcing bar S comes into contact with at least one of the first abutment portion 91a and the second abutment portion 91b on or near the extension of the axis L of the rotational movement of the binding unit 7. Then, when the reinforcing bar S presses at least one of the first abutment portion 91a and the second abutment portion 91b and moves backward, it is detected that the contact switch unit 9 has been activated, and the binding operation is performed.

[0103] This allows the binding operation to be performed with the reinforcing bar S positioned on or near the extension of the axis L of the rotational movement of the binding unit 7. Furthermore, since the movement direction of the first abutment portion 91a and the second abutment portion 91b is the front-to-rear direction along the axis L of the rotational movement of the binding unit 7, even in the operation of activating the contact switch unit 9, the position of the reinforcing bar S is prevented from significantly shifting from the extension of the axis L of the rotational movement of the binding unit 7 or near it.

[0104] Therefore, the position where the wire W is twisted and the position of the reinforcing bar S are prevented from being significantly misaligned, ensuring binding strength. [Explanation of symbols]

[0105] 1A rebar tying machine, 10 main body, 11 handle, 12 trigger switch, 13a trigger, 13b switch, 2 magazine, 3 wire feed section, 30 feed gear, 4 wire guide, 5 curl forming section, 50 curl guide, 51 guiding guide, 6 cutting section, 7 bundling section, 70 wire retaining body, 72 rotating shaft, 8 drive section, 80 motor 9. Contact switch unit, 91. Abutment portion (91a. first abutment portion, 91b. second abutment portion), 92. Moving member (92a. first moving member, 92b. second moving member), 93. Biasing member (93a. first biasing member, 93b. second biasing member), 94. Detection unit, 94a. Moving element, 95. Transmission member, 94a. Shaft, 95b. Biasing member, W. Wire

Claims

1. A main body, a wire feeding unit that feeds the wire to be wound around the object to be bound; a bundling unit that locks the wire fed by the wire feeding unit and twists the locked wire to twist and bind the wire wound around the object to be bound; a curl guide provided at one end of the main body portion and configured to curl the wire fed by the wire feeding portion; a guide provided at one end of the main body portion and configured to guide the wire curled by the curl guide to the bundling portion; a contact switch unit having a first abutment unit and a second abutment unit that are positioned between the curl guide and the guiding guide and move when the object to be bound is abutted against them, the first abutment unit being provided on one side of the axis of rotation of the binding unit along a direction perpendicular to the direction in which the curl guide and the guiding guide are aligned and movable from a first position to a second position along the axis of rotation of the binding unit, and the second abutment unit being provided on the other side of the axis of rotation of the binding unit along a direction perpendicular to the direction in which the curl guide and the guiding guide are aligned and movable from the first position to a second position along the axis of rotation of the binding unit, independently of the first abutment unit; and a detection unit that detects that at least one of the first abutting portion and the second abutting portion has moved; a transmission member that transmits movement of the first abutting portion and / or the second abutting portion to the single detection portion; a control unit that controls the drive of the binding unit, a protrusion amount from one end of the main body to a front end position of the abutting portion along an axis of rotation of the binding portion is configured to be shorter than a protrusion amount from one end of the main body to front end positions of the curl guide and the induction guide along the axis of rotation of the binding portion, The control unit controls the bundling unit so that a bundling operation is performed when the first abutting unit and / or the second abutting unit moves and the contact switch unit is activated. Binding machine.

2. The abutment portion is movably attached to a case that constitutes the main body portion. The binding machine according to claim 1 .

3. The abutting portion moves in a linear direction along the axis of the rotational movement of the binding portion. The binding machine according to claim 1 or 2.

4. The abutting portion moves by rotation in an arc direction along the axis of the rotation of the binding portion. The binding machine according to claim 1 or 2.

5. A handle portion protruding from the main body portion; a trigger switch portion that is actuated by operation of a hand gripping the handle portion, When the trigger switch section and the contact switch section are actuated, a bundling operation is performed. The binding machine according to any one of claims 1 to 4.

Images