Binding machine

Abstract

To provide a rebar binding machine that can eliminate the need to adjust the positional deviation or inclination deviation of the shaft center of an operation dial and a rotary switch.SOLUTION: The operating part 9 of a rebar binding machine includes an operation dial 90 that can receive rotation operation, a rotary switch 91 that has a rotatable shaft 91b, and a connection part 92 that connects the shaft 91b to the operation dial 90 so that the shaft 91b can rotate, and supports the operation dial 90 so that its position can be changed in the direction in which the shaft 91b extends.SELECTED DRAWING: Figure 4A

Description

[Technical field]

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

[0002] Steel bars are used in concrete structures to increase their strength, and are tied together with wire to prevent the bars from shifting from their designated position when the concrete is poured.

[0003] Conventionally, there has been proposed a binding machine known as a reinforcing bar binding machine, which wraps wire around two or more reinforcing bars and twists the wire wrapped around the reinforcing bars to bind the two or more reinforcing bars with the wire (see, for example, Patent Document 1).

[0004] Also, a binding machine has been proposed that is provided with an operation unit that can set the strength of the force used to twist the wire, and in such a binding machine, the operation unit has a configuration that includes a rotatable dial.

[0005] A dial-type operating switch device that has been proposed includes a dial knob that can be rotated by a user, a rotary switch having a rotatable rotor shaft, a rotor that is fitted into the dial knob and rotates integrally with the dial knob, and a relay member that connects the rotor and the rotor shaft of the rotary switch and transmits the rotational force of the rotor to the rotor shaft (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6791141 [Patent Document 2] JP 2020-136023 A Summary of the Invention [Problem to be solved by the invention]

[0007] In a conventional dial-type operation switch device, if there is a misalignment in the position or inclination of the axis of the dial knob and rotor, and the rotor shaft of the rotary switch, it is difficult to assemble them together and a load is applied to the rotor shaft of the rotary switch. For this reason, it is necessary to adjust the misalignment in the position or inclination of the axis of the dial knob and rotor, and the rotor shaft of the rotary switch.

[0008] An object of the present invention is to provide a binding machine that can eliminate the need to adjust the positional deviation or inclination deviation of the axis of an operation dial and a rotary switch. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the present invention provides a binding machine that includes an operating dial that can be rotated, a rotary switch having a rotatable shaft, and a connection portion that connects the shaft and the operating dial so that the shaft can be rotatable, and supports the operating dial so that its posture can be changed in the direction in which the shaft extends.

[0010] In the present invention, the operating dial and the axis of the rotary switch are relatively movable in a direction inclined with respect to the extension direction of the axis, in a direction perpendicular to the extension direction of the axis, and in a direction along the extension direction of the axis. Effect of the Invention

[0011] In the present invention, the connection part can absorb misalignment or inclination of the axis of the operation dial and the rotary switch. This allows assembly even if the axis of the rotary switch and the axis of the operation dial are misaligned. Also, assembly is possible even if the axis of the rotary switch and the operation dial are not perpendicular. Furthermore, the load on the axis of the rotary switch can be suppressed. [Brief description of the drawings]

[0012] [Figure 1] 1 is a side view showing an example of the internal configuration of a reinforcing bar binding machine according to an embodiment of the present invention; [Diagram 2] 1 is an external perspective view showing an example of the overall configuration of a reinforcing bar binding machine according to an embodiment of the present invention. [Diagram 3] FIG. 2 is an exploded perspective view showing an example of an operation unit according to the present embodiment. [Figure 4A] FIG. 2 is an exploded perspective view of a main part showing an example of an operation unit according to the present embodiment. [Figure 4B] FIG. 2 is an exploded perspective view of a main part showing an example of an operation unit according to the present embodiment. [Figure 5A] FIG. 2 is a side cross-sectional view showing an example of an operation unit according to the present embodiment. [Figure 5B] FIG. 2 is a side cross-sectional view showing an example of an operation unit according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] 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.

[0014] <Configuration example of the reinforcing bar binding machine according to this embodiment> FIG. 1 is an internal configuration diagram seen from the side showing an example of the overall configuration of a reinforcing bar binding machine of the present embodiment, and FIG. 2 is an external perspective view showing an example of the overall configuration of a reinforcing bar binding machine of the present embodiment.

[0015] The reinforcing bar binding machine 1A is designed to be held by an operator and includes a main body 10 and a handle 11. The reinforcing bar binding machine 1A feeds the wire W in the forward direction indicated by the arrow F to wind it around the reinforcing bar S to be bound, and then feeds the wire W wound around the reinforcing bar S in the reverse direction indicated by the arrow R to wind it around the reinforcing bar S, and then twists the wire W to bind the reinforcing bar S with the wire W. The reinforcing bar binding machine 1A binds the reinforcing bars S with multiple wires W, two wires W in this example.

[0016] In order to realize the above-mentioned functions, the reinforcing bar binding machine 1A includes a magazine 2 that stores the wire W, a wire feeding unit 3 that feeds two wires W arranged in a radial direction of the wire W, and a wire guide 4 that guides the two wires W fed to the wire feeding unit 3. The reinforcing bar binding machine 1A also includes a curl forming unit 5 that forms a circular feed path that winds the two wires W fed by the wire feeding unit 3 around the reinforcing bar S, and a cutting unit 6 that cuts the two wires W wound around the reinforcing bar S. The reinforcing bar binding machine 1A also includes a binding unit 7 that twists the two wires W wound around the reinforcing bar S, and a drive unit 8 that drives the binding unit 7. The reinforcing bar binding machine 1A also includes an operation unit 9 that can set the magnitude of the binding force used to twist and bind the wire W.

[0017] The magazine 2 rotatably and detachably stores a reel 20 around which a long wire W is wound so as to be able to be paid out. The wire W is a wire made of a metal wire capable of plastic deformation, a wire made of a metal wire covered with resin, or a twisted wire. Two wires W are wound around the reel 20, and the two wires W can be pulled out from the reel 20 at the same time.

[0018] The wire feeding unit 3 includes a pair of feed gears 30 that clamp and feed two parallel wires W. In the wire feeding unit 3, the rotational motion of a feed motor (not shown) is transmitted to one of the pair of feed gears 30. In addition, the pair of feed gears 30 transmit the rotational motion of one feed gear 30 to the other feed gear 30 by meshing of the gear portions.

[0019] The wire feed unit 3 aligns the two wires W in the direction in which the pair of feed gears 30 are aligned. In addition, the wire feed unit 3 switches the rotation direction of the feed gear 30 by switching between forward and reverse rotation directions of a feed motor (not shown), thereby switching between forward and reverse feed directions of the wires W.

[0020] The wire guide 4 is disposed on the upstream side and the downstream side (not shown) of the feed gear 30 with respect to the feeding direction of the wire W fed in the forward direction. The wire guide 4 guides the two entering wires W between the pair of feed gears 30 by aligning them in the direction in which the pair of feed gears 30 are aligned.

[0021] The curl forming unit 5 is provided with a curl guide 50 that curls the two wires W fed by the wire feed unit 3 and regulates the parallel orientation of the two wires W, and an induction guide 51 that guides the two wires W that have been curled by the curl guide 50 to the bundling unit 7. The curl forming unit 5 curls the two wires W that are fed by the wire feed unit 3 and pass through the curl guide 50, thereby forming a circular feed path Ru as shown by the two-dot chain line in FIG. 1 that runs from the curl guide 50 through the induction guide 51 to the bundling unit 7.

[0022] 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.

[0023] The bundling unit 7 includes a wire locking body 70 to which the wire W is locked, and a sleeve 71 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.

[0024] The reinforcing bar binding machine 1A includes a feed restricting unit 16 against which the tip of the wire W abuts at the end of the feed path of the wire W, which passes through a circular feed path Ru and is locked by a wire locking body 70. In addition, in the reinforcing bar binding machine 1A, the curl guide 50 and the guiding guide 51 of the curl forming unit 5 described above are provided at the front end of the main body 10. Furthermore, in the reinforcing bar binding machine 1A, an abutting unit 17 against which the reinforcing bar S abuts is provided between the curl guide 50 and the guiding guide 51 at the front end of the main body 10.

[0025] In the rebar tying machine 1A, a handle unit 11 extends downward from a main body unit 10. Furthermore, a battery 15 is detachably attached to the lower part of the handle unit 11. Furthermore, in the rebar tying machine 1A, a magazine 2 is provided in front of the handle unit 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, etc. are stored in the main body unit 10.

[0026] The rebar tying machine 1A has a trigger 12 provided on the front side of a handle portion 11, and a switch 13 provided inside the handle portion 11. In the rebar tying machine 1A, a control unit (not shown) controls the feed motor and the motor 80 according to the state of the switch 13 pressed by operating the trigger 12.

[0027] <Configuration example of the operation unit according to this embodiment> FIG. 3 is an exploded perspective view showing an example of an operating section of the present embodiment, FIGS. 4A and 4B are exploded perspective views of the main parts showing an example of the operating section of the present embodiment, and FIGS. 5A and 5B are side cross-sectional views showing an example of the operating section of the present embodiment.

[0028] An example of the operation unit 9 according to the present embodiment will be described below with reference to the respective drawings. The operation unit 9 includes an operation dial 90, a rotary switch 91, a connection portion 92, a substrate 93, and a case 94.

[0029] The operation dial 90 includes a dial portion 90a and a connected portion 90b. The dial portion 90a has a shape that can receive an operation to rotate the operation dial 90, and has, for example, a circular outer shape.

[0030] The connected portion 90b protrudes from the back surface of the dial portion 90a along the axial direction of rotation of the operation dial 90. The connected portion 90b has a generally cylindrical shape with an open axial end 90c protruding from the back surface of the dial portion 90a. The connected portion 90b has a hole 90d formed therein that connects from the opening of the end 90c to the back surface of the dial portion 90a along the axial direction.

[0031] The connected portion 90b has grooves 90e at two diametrically opposed positions. The grooves 90e penetrate from the outer circumferential surface of the connected portion 90b to the hole 90d. The grooves 90e extend in the axial direction of the operation dial 90 and connect to the end portion 90c.

[0032] The connected portion 90b includes a rotation angle regulating portion 90f. The rotation angle regulating portion 90f is configured by providing a recess and a protrusion along the circumferential direction on the outer circumferential surface of the connected portion 90b. An elastic member (not shown) provided on the rear cover 100 engages with the rotation angle regulating portion 90f. As a result, the operation dial 90 is given a clicking sensation when rotating the operation dial 90 in a state in which the rotation angle at the time of rotation is regulated according to the pitch of the recesses and protrusions of the rotation angle regulating portion 90f.

[0033] The operation dial 90 includes a locking portion 90g. The locking portion 90g is provided at a plurality of locations along the circumferential direction of the rotation of the operation dial 90, outside the connected portion 90b along the radial direction of the operation dial 90. The locking portion 90g protrudes from the rear surface of the dial portion 90a along the axial direction of the rotation of the operation dial 90. The locking portion 90g has a convex portion 90h that protrudes outward along the radial direction of the operation dial 90 at an end portion in the axial direction protruding from the rear surface of the dial portion 90a.

[0034] The rear cover 100 is an example of a main body cover, and is attached to the main body 10 of the rebar tying machine 1A. The rear cover 100, which constitutes part of the exterior of the rebar tying machine 1A, has a hole 101 formed therein with a diameter that can fit an imaginary circle connecting multiple engaging portions 90g arranged circumferentially, and along the edge of the hole 101, an engaging surface 102 is formed on which the protrusions 90h of the engaging portions 90g engage.

[0035] When the connected portion 90b and the locking portion 90g of the operation dial 90 are inserted into the hole 101 of the rear cover 100, the locking portion 90g elastically deforms and the convex portion 90h climbs over the edge of the hole 101, and the convex portion 90h is locked to the locked surface 102. As a result, the operation dial 90 is rotatably supported by the rear cover 100 in a form in which the locking portion 90g can move along the edge of the hole 101. The center of rotation of the operation dial 90 is located at a position that approximately coincides with the center of the hole 101. Therefore, the center of rotation of the operation dial 90 is determined by the rear cover 100.

[0036] The rotary switch 91 includes a switch body 91a and a shaft 91b that is rotatable relative to the switch body 91a. The switch body 91a includes a mechanism that switches connections between internal terminals (not shown) by rotating the shaft 91b. The shaft 91b is cylindrical and rotates in the circumferential direction. The shaft 91b protrudes in the axial direction from the switch body 91a. A groove 91c that extends along the axial direction is formed on the outer circumferential surface of the shaft 91b. An external terminal 91d is provided on the surface of the switch body 91a opposite to the surface from which the shaft 91b protrudes.

[0037] The connection part 92 includes a switch connection part 92a and a dial connection part 92b. The switch connection part 92a is generally cylindrical with one end 92c in the axial direction open. The outer diameter of the generally cylindrical shape of the switch connection part 92a is smaller than the inner diameter of the hole 90d of the connected part 90b of the operation dial 90, and the switch connection part 92a can be inserted into the hole 90d.

[0038] The switch connection part 92a has a hole part 92d formed therein, which is connected in the axial direction from the opening of the end part 92c. The switch connection part 92a has a generally cylindrical shape, and the inner diameter of the hole part 92d is generally the same as or slightly larger than the outer diameter of the shaft 91b of the rotary switch 91, so that the shaft 91b can be inserted therein.

[0039] The switch connection portion 92a has a protrusion 92e extending along the axial direction on the inner surface of the hole 92d. The protrusion 92e protrudes radially inward from the inner circumferential surface of the hole 92d by a predetermined height and is shaped to fit into the groove 91c of the shaft 91b of the rotary switch 91.

[0040] The height of the protrusion 92e that protrudes radially inward from the inner circumferential surface of the hole 92d is a dimension that allows the protrusion 92e to enter the groove 91c when the shaft 91b of the rotary switch 91 is inserted into the hole 92d of the switch connection part 92a. This restricts the connection part 92 from freely rotating in the circumferential direction with respect to the shaft 91b of the rotary switch 91.

[0041] The dial connection portion 92b protrudes from the outer circumferential surface of the switch connection portion 92a toward the outside in the radial direction of the switch connection portion 92a. The dial connection portion 92b is provided at the other end of the switch connection portion 92a in the axial direction, and protrudes toward the outside from at least two points that face each other in the radial direction of the switch connection portion 92a. The dial connection portion 92b is a cylindrical protrusion, and the outer diameter of the cylindrical shape is smaller than the width of the groove portion 90e of the connected portion 90b of the operation dial 90.

[0042] The height of the dial connection portion 92b that protrudes radially outward from the outer peripheral surface of the switch connection portion 92a is such that it fits into the groove portion 90e when the connection portion 92 is inserted into the hole portion 90d of the connected portion 90b of the operating dial 90.

[0043] The substrate 93 is fixed to the case 94 with screws (not shown) and is further sealed with resin (not shown). The rotary switch 91 has external terminals 91d inserted into through holes 93a in the substrate 93 and is electrically connected and fixed by soldering. The rotary switch 91 may have a configuration in which a part of the switch body 91a is sealed with resin and fixed to the substrate 93 while the shaft 91b is rotatable. The case 94 is fixed to the rear cover 100 with screws 94a.

[0044] <Examples of the effects of the operation unit according to this embodiment> The rotary switch 91 has a connection part 92 attached to a shaft 91b. The connection part 92 has the shaft 91b inserted into a hole 92d of a switch connection part 92a. When the shaft 91b is inserted into the hole 92d, a protrusion 92e of the hole 92d fits into a groove 91c of the shaft 91b. This restricts the connection part 92 from freely rotating in the circumferential direction relative to the shaft 91b of the rotary switch 91.

[0045] The operation dial 90 is attached to the rear cover 100. When the connected portion 90b and the locking portion 90g are inserted into the hole 101 of the rear cover 100, the operation dial 90 is rotatably supported by the rear cover 100.

[0046] When the case 94 is attached to the rear cover 100 with the connection part 92 attached to the shaft 91b of the rotary switch 91, the connection part 92 is inserted into the hole 90d of the operation dial 90. The groove part 90e of the operation dial 90 is connected to the end part 90c of the connected part 90b. As a result, when the connection part 92 is inserted into the hole part 90d of the operation dial 90, the dial connection part 92b of the connection part 92 is inserted into the groove part 90e of the operation dial 90.

[0047] When the operation dial 90 is rotated with the dial connection portion 92b of the connection portion 92 inserted into the groove portion 90e of the operation dial 90, the force of rotation of the operation dial 90 is transmitted to the connection portion 92 via the groove portion 90e and the dial connection portion 92b.

[0048] In addition, when the connection portion 92 rotates, the force with which the connection portion 92 rotates is transmitted to the shaft 91b via the protrusion 92e provided in the hole 92d of the connection portion 92 and the groove 91c of the shaft 91b inserted into the hole 92d of the connection portion 92.

[0049] As a result, the operation dial 90 is connected to the shaft 91b of the rotary switch 91 via the connection portion 92. When the operation dial 90 is rotated, the shaft 91b of the rotary switch 91 rotates.

[0050] As shown in FIG. 5A and FIG. 5B, the extension direction of the shaft 91b is the X-axis, as shown in FIG. 5A, the extension direction of the dial connection part 92b is the Y-axis, and as shown in FIG. 5B, the direction perpendicular to the extension direction of the dial connection part 92b is the Z-axis. The operation dial 90 and the shaft 91b of the rotary switch 91 can rotate relatively within a predetermined angle with the dial connection part 92b of the connection part 92 as the rotation axis. That is, the operation dial 90 can be tilted with respect to the X-axis with the Y-axis as the center of rotation in the direction of the arrow Z1 in FIG. 5B. In addition, the groove part 90e of the operation dial 90 extends in the axial direction, so that the dial connection part 92b of the connection part 92 can move along the groove part 90e. As a result, the operation dial 90 and the shaft 91b of the rotary switch 91 can be rotated relatively within a predetermined angle even in a direction inclined with respect to the extension direction of the dial connection part 92b of the connection part 92. That is, the operation dial 90 can be tilted with respect to the X-axis around the Z-axis in the direction of the arrow Y1 in Fig. 5A. Therefore, the operation dial 90 has a degree of freedom of rotation with respect to the switch connection part 92a of the connection part 92, with two axes perpendicular to the extension direction of the shaft 91b as the rotation center. Therefore, when the direction inclined with respect to the extension direction of the shaft 91b (X-axis) is defined as a first direction, the operation dial 90 and the shaft 91b of the rotary switch 91 can be relatively tilted within a predetermined angle in any first direction with respect to the extension direction of the shaft 91b.

[0051] Furthermore, the operation dial 90 and the shaft 91b of the rotary switch 91 are relatively movable within a predetermined range in a second direction along the YZ plane including the Y-axis and the Z-axis, which is a direction perpendicular to the direction in which the shaft 91b extends (X-axis), due to the difference between the inner diameter of the hole 90d of the operation dial 90 and the outer diameter of the connection portion 92, and the difference between the width of the groove portion 90e of the operation dial 90 and the outer diameter of the dial connection portion 92b of the connection portion 92. Thus, the operation dial 90 has a degree of freedom of movement in a direction perpendicular to the direction in which the shaft 91b extends, relative to the switch connection portion 92a of the connection portion 92.

[0052] Furthermore, the operation dial 90 and the shaft 91b of the rotary switch 91 are relatively movable within a predetermined range in a third direction along the X-axis, which is the direction in which the shaft 91b extends.

[0053] As described above, the operation dial 90 is rotatably supported by the rear cover 100. In contrast, the rotary switch 91 is fixed to the case 94 via the substrate 93. In this configuration, when the case 94 is fixed to the rear cover 100, the operation dial 90 and the shaft 91b of the rotary switch 91 may be inclined relative to each other within a predetermined tolerance range with respect to the axial direction. In addition, the operation dial 90 and the shaft 91b of the rotary switch 91 may have their respective axial centers misaligned relative to each other within a predetermined range in a direction perpendicular to the direction in which the shaft 91b extends. Furthermore, the operation dial 90 and the shaft 91b of the rotary switch 91 may have their respective axial centers misaligned relative to each other within a predetermined range in the axial direction.

[0054] In contrast, in the operation unit 9, the operation dial 90 is connected to a shaft 91b of the rotary switch 91 via a connection part 92. The connection part 92 connects the operation dial 90 and the shaft 91b of the rotary switch 91 so as to be relatively movable in a first direction inclined with respect to the extension direction of the shaft 91b, a second direction perpendicular to the extension direction of the shaft 91b, and a third direction along the extension direction of the shaft 91b.

[0055] As a result, the operation unit 9 can absorb misalignment or inclination of the axial center of the operation dial 90 and the rotary switch 91 at the connection portion 92. Therefore, assembly is possible even if the axial center of the rotary switch 91 and the axial center of the operation dial 90 are misaligned. Also, assembly is possible even if the axis 91b of the rotary switch 91 and the operation dial 90 are not perpendicular.

[0056] Furthermore, even if the axis of the rotary switch 91 and the axis of the operation dial 90 are misaligned, it is possible to prevent a load from being applied to the axis 91b of the rotary switch 91. Also, even if the axis 91b of the rotary switch 91 and the operation dial 90 are not perpendicular to each other, it is possible to prevent a load from being applied to the axis 91b of the rotary switch 91.

[0057] This makes it possible to prevent an error in the output of the rotary switch 91 due to a load being applied to the shaft 91b of the rotary switch 91 when the case 94 is fixed to the rear cover 100. Furthermore, since the rotation angle of the operation dial 90 is restricted in accordance with the pitch of the projections and recesses of the rotation angle restricting portion 90f, even in a state in which the operation dial 90 has a degree of freedom of movement in each of the above directions relative to the shaft 91b, the operation dial 90 does not feel loose to the operator, and a clicking sensation can be imparted to the operation of rotating the operation dial 90.

[0058] In the above embodiment, the dial connection parts 92b are configured to protrude outward from at least two locations facing each other in the radial direction of the switch connection part 92a. However, the dial connection parts 92b may be configured to be provided in three or more locations in the circumferential direction of the switch connection part 92a. In such a configuration, the groove parts 90e of the operation dial 90 are provided according to the arrangement and number of the dial connection parts 92b.

[0059] In the above embodiment, the connection portion 92 includes the dial connection portion 92b, which is a protrusion that protrudes in a radial direction intersecting with the extension direction of the shaft 91b, and the operation dial 90 includes a groove portion 90e into which the dial connection portion 92b is inserted. Alternatively, the operation dial 90 may include a protrusion that protrudes in a radial direction intersecting with the extension direction of the shaft 91b, and the connection portion 92 may include a groove portion into which the protrusion is inserted. Furthermore, the connection portion 92 may be provided integrally with the shaft 91b of the rotary switch 91.

[0060] <Example of operation of the reinforcing bar binding machine according to the present embodiment> Next, an operation of binding a reinforcing bar S with a wire W by the reinforcing bar binding machine 1A of this embodiment will be described with reference to each drawing.

[0061] When the reinforcing bar S is placed between the curl guide 50 and the induction guide 51 of the curl forming section 5 and the trigger 12 is operated, the feed motor (not shown) is driven in the forward rotation direction, and the two wires W clamped by a pair of feed gears 30 are fed in the forward direction indicated by the arrow F.

[0062] The wire W fed in the forward direction 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 curling tendency to be wound around the reinforcing bar S along the circular feed path Ru.

[0063] The wire W having been curled by the curl guide 50 is guided by the induction guide 51 and is further fed in the forward direction by the wire feed unit 3, so as to be guided to the wire locking body 70. When the tip of the wire W is fed to a position where it abuts against the feed restriction unit 16, the drive of the feed motor (not shown) is stopped.

[0064] After the forward feed of the wire W is stopped, the motor 80 is driven in the forward rotation direction. The rotation of the sleeve 71 is restricted in the operating range where the wire locking body 70 locks the wire W. This converts the rotation of the motor 80 into linear movement, and the sleeve 71 moves forward, in the direction of the arrow A1. When the sleeve 71 moves forward, the wire W is locked by a predetermined operation of the wire locking body 70.

[0065] After the sleeve 71 has been advanced to a position where the wire W is held by the wire holding member 70, the rotation of the motor 80 is temporarily stopped, and the feed motor is driven in the reverse rotation direction.

[0066] 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 R. By feeding the wire W in the reverse direction, the wire W is wound around the reinforcing bar S.

[0067] After winding the wire W around the rebar S and stopping the reverse rotation of the feed motor, the motor 80 is driven in the forward rotation direction, causing the sleeve 71 to move further forward as indicated by the arrow A1. The forward movement of the sleeve 71 is transmitted to the cutting unit 6 by the transmission mechanism 62, causing the movable blade unit 61 to rotate, and the wire W is cut at a predetermined position by the operation of the fixed blade unit 60 and the movable blade unit 61.

[0068] By driving the motor 80 in the forward rotation direction, the sleeve 71 is moved forward as indicated by the arrow A1 to cut the two wires W, and at almost the same time, the wire W is pushed forward by the wire locking body 70, and the tip and end sides of the wire W are bent toward the reinforcing bar S.

[0069] After the tip and end of the wire W are bent toward the rebar S, the motor 80 is further driven in the forward rotation direction, so that the sleeve 71 moves further forward. When the sleeve 71 moves to a predetermined position, the restriction on the rotation of the sleeve 71 is released.

[0070] As a result, the motor 80 is further driven in the forward rotation direction, causing the sleeve 71 to rotate and starting the operation of twisting the wire W locked by the wire locking body 70. When it is detected that the load on the motor 80 has reached a maximum due to the twisting of the wire W, the forward rotation of the motor 80 is stopped. Next, when the motor 80 is driven in the reverse rotation direction, the sleeve 71 moves in the rear direction, that is, in the direction of arrow A2, with its rotation restricted.

[0071] When the sleeve 71 moves rearward, the wire W is released from the wire locking body 70, and the wire W binding the reinforcing bar S comes out of the wire locking body 70.

[0072] In the rebar binding machine 1A, a shaft 91b of a rotary switch 91 rotates when an operation dial 90 is rotated on an operation unit 9. A control unit (not shown) of the rebar binding machine 1A controls the amount of rotation of the motor 80 according to the rotation angle of the shaft 91b of the rotary switch 91. This makes it possible to set the magnitude of the binding force that twists and binds the wire W. [Explanation of symbols]

[0073] 1A rebar tying machine, 2 magazine, 20 reel, 3 wire feed section, 30 feed gear, 5 curl forming section, 50 curl guide, 51 induction guide, 6 cutting section, 7 bundling section, 70 wire retaining body, 71 sleeve, 8 drive section, 80 motor, 81 reducer, 90 operation dial, 90a dial section, 90b connected section, 90c end section, 90d hole section, 90e groove section, 90f rotation angle regulating section , 90g... locking portion, 90h... convex portion, 91... rotary switch, 91a... switch body, 91b... shaft, 91c... groove portion, 91d... external terminal, 92... connection portion, 92a... switch connection portion, 92b... dial connection portion, 92c... end portion, 92d... hole portion, 92e... convex portion, 93... board, 93a... through hole, 94... case, 94a... screw, 100... rear cover (body cover), 101... hole, 102... locking surface, W... wire

Claims

1. an operation dial capable of receiving a rotation operation; a rotary switch having a rotatable shaft; a connection portion that connects the shaft and the operation dial so as to be rotatable about the shaft, and supports the operation dial so as to be capable of changing its attitude with respect to the extending direction of the shaft; A bundling machine equipped with

2. The connection portion includes a dial connection portion that protrudes in a radial direction intersecting with the extending direction of the axis, The operation dial has a groove into which the dial connection portion is inserted. The strapping machine according to claim 1.

3. The dial connection portion is provided at least at two locations facing each other in the radial direction. The strapping machine according to claim 2.

4. The groove portion extends along the extending direction of the shaft. The strapping machine according to claim 2.

5. The connection portion includes a switch connection portion connected to the shaft and aligned along the extending direction of the shaft, The operation dial has a degree of freedom of rotation with respect to the switch connection portion, the degree of rotation being centered on two axes perpendicular to the direction in which the axis extends. The strapping machine according to claim 1.

6. The connection portion includes a switch connection portion connected to the shaft and aligned along the extending direction of the shaft, The operation dial has a degree of freedom of movement in a direction perpendicular to the direction in which the axis extends relative to the switch connection portion. The strapping machine according to claim 1.

7. The operation dial includes a protrusion protruding in a radial direction intersecting with a direction in which the shaft extends, The connection portion has a groove into which the protrusion is inserted. The strapping machine according to claim 1.

8. The operation dial is rotatably supported on the main body cover, The rotary switch is supported by a case attached to the main body cover. The strapping machine according to claim 1.

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