Binding device and binding system

Abstract

To provide a binding device capable of suppressing the occurrence of feeding failure of a wire caused by loosening of the wire.SOLUTION: The binding device 100 includes the reinforcing bar binding machine 1 configured to bind the reinforcing bars S with the wire W, the first guide portion 23 configured to support the wire W pulled out from the reel 20, and the wire guide portion 26 provided between the reel 20 and the first guide portion 23, wherein the wire guide portion 26 is provided on the inner side toward the winding direction of the wire W with respect to the reel 20 from the virtual line, which is the tangential line of the virtual circle defined according to the winding diameter of the wire W wound around the reel 20 and passes through the first guide portion 23, and comes into contact with the wire W from the outer side in the opening direction opposite to the winding direction of the wire W with respect to the reel 20.SELECTED DRAWING: Figure 1B

Description

[Technical Field]

[0001] The present invention relates to a bundling device for bundling reinforcing bars with wire and a bundling system equipped with the bundling device. [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 positions when the concrete is poured.

[0003] Conventionally, a binding machine called a rebar binding machine has been proposed, which has a wire feeding section that feeds wire to a binding section, winds the wire around two or more rebars, and twists the wire wound around the rebars to bind the two or more rebars with the wire.

[0004] A technique has been proposed in which such a reinforcing bar binding machine is applied to equipment that is installed and used (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2023-105958 Summary of the Invention [Problem to be solved by the invention]

[0006] When applying a rebar tying machine to equipment, it is possible to configure the reel around which the wire is wound to be installed outside the rebar tying machine. In a tying machine with a reel installed outside the rebar tying machine, the reel can be made larger than the reels that can be loaded into conventional hand-held rebar tying machines, allowing for a larger wire capacity.

[0007] On the other hand, in a configuration where the reel is installed outside the rebar binding machine, the distance between the reel and the rebar binding machine is longer than in a configuration where the reel is housed inside the rebar binding machine, which makes it easier for the wire pulled out from the reel to become slack between the reel and the rebar binding machine.

[0008] A reel is composed of a core around which a wire is wound and flanges that protrude radially from both axial ends of the core. Pulleys are sometimes used as guides to guide the wire pulled out from the reel and form a wire path in an appropriate position. The reel and pulley are provided with flanges or other parts to prevent the wire from protruding.

[0009] However, if the wire loosens at the point where it is pulled out from the reel, it may come off the protrusion prevention part. If the wire is fed again after it has come off the protrusion prevention part, the wire may become tangled in the protrusion prevention part or other parts, causing a wire feeding failure.

[0010] The present invention has been made to solve such problems, and aims to provide a binding device and a binding system that can suppress the occurrence of poor wire feeding due to slack in the wire. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems, the present invention provides a binding device for binding multiple reinforcing bars with wire, comprising two wire support portions located in the wire path and a wire guide portion provided between the two wire support portions, one or both of the two wire support portions having a peripheral portion around which the wire is wound at least in part and a protrusion prevention portion protruding from the peripheral portion, and the wire guide portion contacts the wire from outside the winding direction of the wire relative to the peripheral portion.

[0012] The present invention also provides a binding device for binding multiple reinforcing bars with wire, comprising two wire support parts located in the wire path and a wire guide part provided between the two wire support parts, one or both of which has a peripheral part around which the wire is wound at least in part and a protrusion prevention part protruding from the peripheral part, and the wire guide part is provided inward from a tangent connecting the outer peripheries of the wire wound around the two wire support parts, in the direction in which the wire is wound relative to the peripheral part.

[0013] Furthermore, the present invention provides a binding system comprising a binding device for binding multiple reinforcing bars with wire and a moving body for moving the binding device, wherein the binding device comprises two wire support portions located in the wire path and a wire guide portion provided between the two wire support portions, one or both of the two wire support portions having a peripheral portion around which the wire is wound at least in part and a protrusion prevention portion protruding from the peripheral portion, and the wire guide portion contacts the wire from outside the winding direction of the wire relative to the peripheral portion.

[0014] The present invention also provides a binding system comprising a binding device that binds multiple reinforcing bars with wire and a movable body that moves the binding device, wherein the binding device comprises two wire support parts located in the wire path and a wire guide part provided between the two wire support parts, one or both of the two wire support parts having a peripheral part around which the wire is wound at least in part and a protrusion prevention part that protrudes from the peripheral part, and the wire guide part is provided inside the tangent line connecting the outer peripheries of the wire wound around the two wire support parts, in the direction in which the wire is wound relative to the peripheral part.

[0015] In the present invention, the wire between the two wire support portions is prevented from loosening outward when the winding of the wire around the wire support portions is released. [Effects of the Invention]

[0016] According to the present invention, even if slack occurs in the wire between the two wire support parts, the wire is prevented from coming off the protrusion suppression part, which prevents the wire from being fed in a state where it has come off the protrusion suppression part and becoming tangled in the protrusion suppression part, thereby preventing poor wire feeding due to slack in the wire. [Brief explanation of the drawings]

[0017] [Figure 1A] 1 is a side view showing an example of a binding device according to an embodiment of the present invention. [Figure 1B] 1 is a side view showing an example of a binding device according to an embodiment of the present invention, with some components not shown. [Figure 1C] 1 is a perspective view showing an example of a binding device according to an embodiment of the present invention. [Figure 1D] FIG. 2 is a rear view showing an example of the binding device of the present embodiment. [Figure 1E] 1 is a side view seen from the back side showing an example of a binding device according to the present embodiment. [Figure 2] FIG. 2 is a side view showing an internal configuration of an example of a reinforcing bar binding machine. [Figure 3] 1 is a perspective view showing an example of a binding system according to an embodiment of the present invention. [Figure 4A] 1 is a side view showing an example of the operation of the binding device of the present embodiment, with some components omitted from the illustration. FIG. [Figure 4B] 1 is a side view showing an example of the operation of the binding device of the present embodiment, with some components omitted from the illustration. FIG. [Figure 4C] 1 is a side view showing an example of the operation of the binding device of the present embodiment, with some components omitted from the illustration. FIG. [Figure 4D] 1 is a side view showing an example of the operation of the binding device of the present embodiment, with some components omitted from the illustration. FIG. [Figure 5A] FIG. 10 is a side view showing a modified example of the binding device of the present embodiment, with some components omitted. [Figure 5B] FIG. 10 is a perspective view showing a modified example of the binding device of the present embodiment. [Figure 5C]FIG. 10 is a rear view showing a modified example of the binding device of the present embodiment. [Figure 5D] FIG. 10 is a side view seen from the back side showing a modified example of the binding device of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a binding device and a binding system according to the present invention will be described with reference to the drawings.

[0019] <Configuration example of binding device according to this embodiment> Fig. 1A is a side view showing an example of the binding device of this embodiment, Fig. 1B is a side view showing an example of the binding device of this embodiment with some components omitted, Fig. 1C is a perspective view showing an example of the binding device of this embodiment, Fig. 1D is a rear view showing an example of the binding device of this embodiment, and Fig. 1E is a side view showing an example of the binding device of this embodiment as seen from the back.

[0020] The binding device 100 includes a reinforcing bar binding machine 1 that binds the intersections of reinforcing bars S arranged in a grid pattern with wire W, a slack forming unit 2 that pulls out the wire W from a reel 20 and forms slack in the wire W between the reinforcing bar binding machine 1 and the reel 20, and a reel storage unit 200 that stores the reel 20. Note that the slack forming unit 2 does not need to have the function of pulling out the wire W from the reel 20 as long as it can form slack.

[0021] 2 is a side view of the internal configuration of an example of a reinforcing bar binding machine. The reinforcing bar binding machine 1 is an example of a binding machine, and feeds a wire W in the forward direction indicated by an arrow F to wind it around a reinforcing bar S, and then feeds the wire W wound around the reinforcing bar S in the reverse direction indicated by an arrow R to wind it around the reinforcing bar S and cut it, and then twists the wire W to bind the reinforcing bar S with the wire W.

[0022] To achieve the above-mentioned functions, the rebar binding machine 1 is equipped with a wire feeding unit 3 that feeds the wire W and a wire guide 4 that guides the wire W. The rebar binding machine 1 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 1 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.

[0023] The wire feeding unit 3 includes a pair of feed gears 30 that sandwich and feed the wire W. The rotation of a feed motor (not shown) is transmitted to the wire feeding unit 3, causing the feed gear 30 to rotate. As a result, the wire feeding unit 3 feeds the wire W sandwiched between the pair of feed gears 30 along the extension direction of the wire W. In a configuration in which multiple pieces of wire W, for example, two pieces of wire W, are fed to bind the reinforcing bars S, the two pieces of wire W are fed in a parallel state.

[0024] The wire feed unit 3 switches the rotation direction of the feed motor (not shown) between forward and reverse, thereby switching the rotation direction of the feed gear 30 and switching the feed direction of the wire W between forward and reverse, either feeding the wire W in the forward direction indicated by arrow F or feeding the wire W in the reverse direction indicated by arrow R.

[0025] 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 to bind reinforcing bars S, the wire guide 4 provided upstream of the wire feeding unit 3 regulates the radial orientation of the two wires W, aligns the two incoming wires W in parallel, and guides them between a pair of feed gears 30. The wire guide 4 provided downstream of the wire feeding unit 3 regulates the radial orientation of the two wires W, aligns the two incoming wires W in parallel, and guides them to the cutting unit 6 and the curl forming unit 5. Note that the wire guide upstream of the wire feeding unit 3 is not shown in FIG. 2.

[0026] 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 1, 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 becomes a loop Ru as shown by the two-dot chain line in Figure 2, and the wire W is wound around the rebar S.

[0027] The cutting unit 6 includes a fixed blade unit 60 and a movable blade unit 61 that cuts the wire W in cooperation with the fixed blade unit 60. The cutting unit 6 cuts the wire W by the rotational movement of the movable blade unit 61 with the fixed blade unit 60 as a fulcrum axis. In the cutting unit 6, the movement of the binding unit 7 is transmitted to the movable blade unit 61.

[0028] The bundling unit 7 includes a locking member 70 that locks the wire W, and a sleeve 71 that operates the locking member 70. The driving unit 8 includes a torsion motor 80 and a reducer 81 that reduces speed and amplifies torque.

[0029] When the binding unit 7 is driven by the drive unit 8, the sleeve 71 activates the locking member 70 to lock the wire W. After the cutting unit 6 cuts the wire W in conjunction with the operation of the sleeve 71, the binding unit 7 twists the wire W by rotating the locking member 70 and the sleeve 71 to bind the reinforcing bar S.

[0030] In the rebar tying machine 1, the tying unit 7 is provided on an imaginary straight line 10L that is along the axial direction of the torsion motor 80, as shown by the dashed line in Figure 2. In addition, when the imaginary straight line 10L of the rebar tying machine 1 is oriented in the vertical direction, a curl guide 50 and an induction guide 51 are provided at the lower end of the machine in a form that protrudes from the main body 10.

[0031] Furthermore, the reinforcing bar binding machine 1 is provided with a wire feeding unit 3 on one side along a direction intersecting with the imaginary straight line 10L, which is a direction intersecting with the axial direction of the torsion motor 80.

[0032] Furthermore, in the binding device 100, a slack forming unit 2 is provided on the side of the reinforcing bar binding machine 1 where the wire feeding unit 3 is provided, i.e., on one side of the reinforcing bar binding machine 1 along a direction that intersects with the imaginary line 10L, which in turn intersects with the axial direction of the torsion motor 80. The slack forming unit 2 forms slack in the wire W between the reinforcing bar binding machine 1 and the reel 20.

[0033] Furthermore, the binding device 100 is provided with a reel storage section 200 above the reinforcing bar binding machine 1 in the direction in which the imaginary line 10L, which is the direction along the axial direction of the torsion motor 80, extends.

[0034] The reel housing 200 rotatably and detachably houses a reel 20 around which a long wire W is wound so as to be reelable. The wire W may be a wire made of a plastically deformable metal wire, a resin-coated metal wire, or a twisted wire. The reel 20 is an example of a wire support portion and is provided in the wire path. The reel 20 includes a core 20a around which the wire W is wound and flange portions 20b that protrude radially from both axial ends of the core 20a. The core 20a is an example of a peripheral portion around which the wire W is wound at least in part, and the flange portions 20b are an example of a protrusion prevention portion that protrudes from the peripheral portion. The wire W is wound around the core 20a between the pair of flange portions 20b.

[0035] When the reinforcing bar binding machine 1 is configured to bind reinforcing bars S with one wire W, the reel storage unit 200 stores one reel 20 around which one wire W is wound, and the reel 20 is configured to pull out one wire W as it rotates. When the reinforcing bar binding machine 1 is configured to bind reinforcing bars S with multiple wires W, the reel storage unit 200 stores multiple reels 20 corresponding to the number of wires W, and each reel 20 is configured to pull out multiple wires W as it rotates. For example, when the reinforcing bar binding machine 1 is configured to bind reinforcing bars S with two wires W, the reel storage unit 200 stores two reels 20 around which one wire W is wound, and each reel 20 is configured to pull out two wires W as it rotates.

[0036] The reel accommodating section 200 may be provided with a braking section that allows rotation of the reel 20 in the direction in which the wire W is pulled out, but restricts rotation of the reel 20 in the opposite direction.

[0037] The slack forming unit 2 includes a first slack forming unit 21 and a second slack forming unit 22. The first slack forming unit 21 is an example of a slack forming mechanism, and includes a first slack forming roller 21a, a guide plate 21b, and guide members 21c and 21d.

[0038] The first slack forming roller 21a is in the shape of a disk with a thickness greater than the diameter of the wire W, and a guide surface 21f that comes into contact with the wire W is formed on the outer periphery of the disk. The first slack forming roller 21a is supported between a pair of guide plates 21b so as to be rotatable about a shaft 21g as a fulcrum.

[0039] Guide plates 21b are provided on both axial sides of first slack forming roller 21a, sandwiching first slack forming roller 21a. In a configuration in which reinforcing bars S are bound with two wires W, first slack forming rollers 21a are provided on both sides of one guide plate 21b, and guide plates 21b are provided on the outer sides of each first slack forming roller 21a.

[0040] Guide member 21c is provided opposite guide surface 21f of first slack forming roller 21a in the path of wire W entering first slack forming unit 21. Guide member 21c is provided between the pair of guide plates 21b in the form of, for example, a cylindrical member extending in a direction intersecting with guide plates 21b.

[0041] The guide member 21d is provided on the path of the wire W coming out of the first slack forming portion 21. The guide member 21d is, for example, a roller that is rotatable about a shaft 21h as a fulcrum and is provided between the pair of guide plates 21b.

[0042] The shafts 21h of the guide members 21c and 21d also function as spacers that define the gap between the pair of guide plates 21b.

[0043] Guide plate 21b is shaped to cover at least a portion of the side of first slack forming roller 21a and at least a portion of the side of guide members 21c and 21d, and to support first slack forming roller 21a and guide members 21c and 21d.

[0044] The second slack forming unit 22 is an example of a slack forming mechanism, and includes a second slack forming roller 22a, a guide plate 22b, and guide members 22c and 22d.

[0045] The second slack forming roller 22a is in the shape of a disk with a thickness greater than the diameter of the wire W, and a guide surface 22f that comes into contact with the wire W is formed on the outer periphery of the disk. The second slack forming roller 22a is supported between a pair of guide plates 22b so as to be rotatable about a shaft 22g as a fulcrum.

[0046] Guide plates 22b are provided on both axial sides of second slack forming roller 22a, sandwiching second slack forming roller 22a. In a configuration in which reinforcing bars S are bound with two wires W, second slack forming rollers 22a are provided on both sides of one guide plate 22b, and guide plates 22b are provided on the outer sides of each second slack forming roller 22a.

[0047] The guide member 22c is provided on the path of the wire W that enters the second slack forming portion 22 from the first slack forming portion 21. The guide member 22c is, for example, a roller that is rotatable about an axis 22h as a fulcrum and is provided between the pair of guide plates 22b.

[0048] Guide member 22d is provided opposite guide surface 22f of second slack forming roller 22a in the path of wire W exiting second slack forming section 22. Guide member 22d is provided between the pair of guide plates 22b in the form of, for example, a cylindrical member extending in a direction intersecting with guide plates 22b.

[0049] The shafts 22h of the guide members 22c and 22d also function as spacers that define the gap between the pair of guide plates 22b.

[0050] Guide plate 22b is shaped to cover at least a portion of the side of second slack forming roller 22a and at least a portion of the side of guide members 22c and 22d, and to support second slack forming roller 22a and guide members 22c and 22d.

[0051] The binding device 100 includes a first guide portion 21i that guides the movement of the first slack forming portion 21, a second guide portion 22i that guides the movement of the second slack forming portion 22, and a drive portion 25 that moves the first slack forming portion 21 and the second slack forming portion 22.

[0052] The first guide portion 21i movably guides the first slack forming portion 21 in a direction along the feed path WL of the wire W entering the rebar binding machine 1, which is defined by the wire feed portion 3, the wire guide 4, etc. The second guide portion 22i movably guides the second slack forming portion 22 in a direction along the feed path WL of the wire W entering the rebar binding machine 1. The second guide portion 22i supports the second slack forming portion 22 so that the guide surface 22f of the second slack forming roller 22a is positioned on an extension of the feed path WL of the wire W entering the rebar binding machine 1, which is defined by the wire feed portion 3, the wire guide 4, etc.

[0053] Driving unit 25 includes a pair of pulleys 25a and 25b, a belt 25c wound around pulleys 25a and 25b, and a motor 25d that drives one of pulleys 25a. Driving unit 25 also includes a first connecting portion 25e that connects first slack forming portion 21 and belt 25c, and a second connecting portion 25f that connects second slack forming portion 22 and belt 25c.

[0054] Pulley 25a is provided on the side closer to the rebar binding machine 1 in the movement direction of first slack forming unit 21 and second slack forming unit 22. Pulley 25b is provided on the side farther from the rebar binding machine 1 in the movement direction of first slack forming unit 21 and second slack forming unit 22. Belt 25c extends in the movement direction of first slack forming unit 21 and second slack forming unit 22. First connecting portion 25e is connected to one side of belt 25c extending between the pair of pulleys 25a, 25b, and second connecting portion 25f is connected to the other side of belt 25c extending between the pair of pulleys 25a, 25b.

[0055] One side and the other side of belt 25c stretching between a pair of pulleys 25a, 25b move in the opposite direction as pulley 25a is rotated by motor 25d, whereby first slack forming portion 21 and second slack forming portion 22 move relatively toward or away from each other depending on the direction of rotation of motor 25d.

[0056] The binding device 100 includes a first guide portion 23 and a second guide portion 24. The first guide portion 23 is an example of a wire support portion and is provided in the wire path between the reel 20 and the first slack forming portion 21. The first guide portion 23 includes a disk-shaped pulley 23a whose outer circumferential surface is in contact with the wire W and around which the wire W is at least partially wound, and guide plates 23b protruding radially from both axial ends of the pulley 23a. The pulley 23a is an example of a circumferential surface portion around which the wire W is at least partially wound, and the guide plates 23b are an example of a protrusion suppression portion protruding from the circumferential surface portion. The first guide portion 23 allows the wire W passing between the pair of guide plates 23b to come into contact with the outer circumferential surface of the pulley 23a, and directs the path along which the wire W drawn from the reel 20 passes toward the first slack forming portion 21.

[0057] The second guide portion 24 is provided between the second slack forming portion 22 and the rebar binding machine 1. The second guide portion 24 allows the wire W to pass through when the wire feeding portion 3 feeds the wire W, and may be provided with a braking portion that restricts the passage of the wire W when the slack forming portion 2 forms slack in the wire W.

[0058] The wire W unwound from the reel 20 extends laterally across the axial direction of the torsion motor 80 relative to the rebar binding machine 1, and its path is changed by the first guide unit 23 toward the slack forming unit 2. The wire W passing through the slack forming unit 2 has its path changed by the second slack forming roller 22a toward the wire feed unit 3 of the rebar binding machine 1.

[0059] The binding device 100 includes a wire guide portion 26 that forms a path through which the wire W passes between the reel 20 and the first guide portion 23. Note that a plurality of first guide portions 23 may be provided, and the wire guide portion 26 may be provided between the plurality of first guide portions 23.

[0060] When the maximum winding diameter (radius) of the wire W, which is determined by the number of turns of the wire W wound on the reel 20, the diameter of the wire W, etc., is r1, the first virtual line that is a tangent from the center O1 of the reel 20 to a virtual circle of radius r1 and passes through the pulley 23a of the first guide section 23, i.e., the shortest tangent line connecting the outer circumferences of the wound wire W, is shown as L1 in Figure 1B.

[0061] Furthermore, when the minimum winding diameter (radius) of the wire W is r2, a second virtual line that is a tangent line from the center O1 of the reel 20 to a virtual circle of radius r2 and passes through the pulley 23a of the first guide section 23, i.e., the shortest tangent line connecting the outer circumferences of the wound wire W, is shown as L2 in Figure 1B.

[0062] The wire guide portion 26 is provided on the inside of the second imaginary line L2 in the winding direction of the wire W, which is the direction in which the wire W is wound around the reel 20. The second imaginary line L2 passes closer to the center O1 of the reel 20 than the first imaginary line L1. Therefore, the wire guide portion 26 is also provided on the inside of the first imaginary line L1 in the winding direction of the wire W, which is the direction in which the wire W is wound around the reel 20.

[0063] The wire guide portion 26 is, for example, annular, and the wire W passes inside the annular shape. The wire guide portion 26 is provided so that the inside of the annular shape is located inside the first imaginary line L1 and the second imaginary line L2 in the winding direction of the wire W around the reel 20.

[0064] As a result, the binding device 100 includes a reinforcing bar binding machine 1 that binds multiple reinforcing bars S with wire W, a first guide portion 23 that is a wire support portion that supports the wire W unwound from a reel 20 that has a core 20a around which the wire W is wound and flange portions 20b that protrude radially from both axial sides of the core 20a, and a wire guide portion 26 that is provided between the reel 20 and the first guide portion 23. The wire guide portion 26 is a tangent to an imaginary circle defined according to the winding diameter of the wire W wound on the reel 20, and is provided inside the imaginary line that passes through the first guide portion 23 and faces in the winding direction of the wire W around the reel 20 (core 20a). The wire guide portion 26 also contacts the wire W from the outside in the release direction that is opposite to the winding direction of the wire W around the reel 20.

[0065] Therefore, the wire W pulled out from the reel 20 is guided by the wire guide section 26 so that part or all of it passes inside the direction in which the wire W is wound on the reel 20, at least relative to the first virtual line L1, depending on the winding diameter of the wire W wound on the reel 20.

[0066] For example, when the winding diameter of the wire W wound around the reel 20 is at its maximum, the wire W unwound from the reel 20 is guided by the wire guide portion 26 so as to pass on the inside of the first imaginary line L1, which is the direction in which the wire W is wound around the reel 20. Note that when the winding diameter of the wire W wound around the reel 20 is at its maximum, the wire W unwound from the reel 20 is also guided by the wire guide portion 26 so that a portion of the wire W passes on the inside of the second imaginary line L2, which is the direction in which the wire W is wound around the reel 20.

[0067] Furthermore, when the winding diameter of the wire W wound on the reel 20 is at its smallest, the wire W pulled out from the reel 20 is guided by the wire guide portion 26 so as to pass on the inside of the first virtual line L1 and the second virtual line L2, which is the direction in which the wire W is wound on the reel 20.

[0068] The wire guide portion 26 is provided within the range of the spacing between the pair of flange portions 20b of the reel 20 in the path along which the wire W passes as it is pulled out from the reel 20 and leads from the reel 20 to the first guide portion 23. Note that if there are multiple reels 20, the wire guide portion 26 may be provided between the outermost flange portions 20b of the multiple reels 20. Similarly, if each of the two wire support portions is a first guide portion 23 and there are multiple wire support portions, the wire guide portion 26 may be provided between the outermost guide plates 23b of the multiple first guide portions.

[0069] In a configuration in which the reinforcing bars S are bound with two wires W, the first guide portion 23 and the wire guide portion 26 are provided corresponding to each reel 20. Furthermore, in order to accommodate the difference between the spacing between the two reels 20 and the spacing between the two first guide portions 23, the wire guide portion 26 guides the paths along which the two wires W pass so that the spacing between the paths gradually narrows from each reel 20 toward the first guide portion 23.

[0070] In the binding device 100, the rebar binding machine 1 is attached to the binding machine support part 101, and the reel storage part 200 is attached to the storage part support part 102. In addition, the binding machine support part 101 is attached to the storage part support part 102. Furthermore, in the binding device 100, the slack forming part 2 is attached to the slack forming part support part 103. In addition, in the binding device 100, the storage part support part 102 and the slack forming part support part 103 are attached to the support part 104.

[0071] The binding device 100 has a support part 104 provided above the rebar binding machine 1 and the reel storage part 200 along the axial direction of the torsion motor 80, and an attachment part 105 to which the robot arm 300 is attached is provided on the support part 104.

[0072] The slack forming unit 2 has a first slack forming unit 21, a second slack forming unit 22, and a drive unit 25 provided on one side of the slack forming unit support unit 103, and a control unit 250 for the drive unit 25 and the like provided on the other side of the slack forming unit support unit 103. The control unit 250 includes a control board (not shown), a board accommodating unit 250a for accommodating the control board, and the like.

[0073] As shown in FIG. 2, the rebar tying machine 1 has the binding unit 7 provided on an imaginary line 10L that is aligned with the axial direction of the torsion motor 80. Furthermore, as shown in FIG. 1A, the binding device 100 has the attachment unit 105 provided on the imaginary line 10L. As a result, the binding device 100 has the binding unit 7 and the attachment unit 105 provided on the same imaginary line 10L. Therefore, when the rebar tying machine 1 is oriented in the up-down direction with the curl forming unit 5 facing downward, the binding unit 7 is provided vertically below the attachment unit 105.

[0074] Furthermore, when the binding device 100 is viewed from the side, the reel storage section 200 stores the reel 20 so that the axis of rotation of the reel 20 is located on an imaginary line 10L that passes through the binding section 7 and the attachment section 105. When the binding device 100 is viewed from a direction perpendicular to the imaginary line 10L, the position of the axis of rotation of each reel deviates from the imaginary line 10L depending on the number of reels used. However, it is sufficient that the reels are arranged so that the center of the line connecting the axes of rotation of all the reels used is located on the imaginary line 10L; in other words, it is sufficient that the line connecting the axes of rotation of multiple reels used is located on the imaginary line 10L.

[0075] <Configuration example of bundling system according to this embodiment> 3 is a perspective view showing an example of a binding system according to the present embodiment. The binding system 301 includes the binding device 100 described above, a robot arm 300, and a stand 311 on which the robot arm 300 is mounted.

[0076] In the description of the binding system 301, the X, Y, and Z directions refer to the directions shown in Fig. 3. The X, Y, and Z directions are perpendicular to each other, the XY plane is a substantially horizontal plane, and the Z direction is a direction substantially along the vertical.

[0077] The mount 311 includes four pillars 312 erected at the four corners in the X and Y directions, and a plurality of beams 313 spanning the upper ends of the pillars 312 in the X and Y directions.

[0078] In the bundling system 301, a workpiece B, which is made up of a plurality of reinforcing bars S arranged in a lattice pattern, is held by a workpiece holding unit 302. The workpiece holding unit 302 includes a holder 321 for holding the workpiece B.

[0079] The holder 321 is formed in the shape of a rectangular plate with four sides aligned along the X and Y directions. Support plates 321a are erected on the four sides of the holder 321 to support a plurality of reinforcing bars S that constitute the workpiece B. The support plates 321a have a plurality of U-shaped grooves 321b that open upward, and the reinforcing bars S are inserted into the U-shaped grooves 321b. The multiple reinforcing bars S are arranged in a lattice pattern along the X and Y directions with their ends inserted into the U-shaped grooves 321b of the support plates 321a.

[0080] The robot arm 300 is an example of a moving body, and is supported by a moving mechanism 346 to move the binding device 100 to a desired position.

[0081] The movement mechanism 346 includes a Y-direction slider 346a suspended on the beam 313 of the stand 311. The Y-direction slider 346a moves the robot arm 300 in the Y direction. Note that the movement mechanism 346 may include, for example, a mechanism for moving the robot arm 300 in the X direction. Furthermore, if the operating range of the robot arm 300 can cover the entire binding area E2 without relying on the movement mechanism 346, the movement mechanism 346 does not need to be provided.

[0082] The robot arm 300 is a ceiling-suspended articulated robot, and is installed facing downward on a Y-direction slider 346a suspended on a beam 313. Specifically, the robot arm 300 includes a base 341, a plurality of arms 342, an end effector 343, and a plurality of joints 344. Note that the robot arm 300 is not limited to an articulated robot.

[0083] The arms 342 are connected in series with each other at the base end portion of the base portion 341. The base portion 341 is supported by a Y-direction slider 346a of a movement mechanism 346 and is movable in the Y direction.

[0084] The plurality of joints 344 rotatably connect the base 341, the plurality of arms 342, and the end effector 343. Each joint 344 is provided with a motor (not shown) and is driven by the motor to rotate.

[0085] The end effector 343 is connected to the tips of the multiple arms 342. The binding device 100 is supported on the end effector 343 via the attachment portion 105.

[0086] The binding system 301 moves the binding device 100 to the position of the intersection P of the binding target by the robot arm 300, and performs the binding operation.

[0087] The bundling system 301 may be configured to include an overall photographing unit that photographs the entire work B all at once or for each of its divided areas, and an individual photographing unit that photographs the intersections P of the rebars S to be bound individually at a higher resolution than that of the overall photographing unit.The bundling system 301 may then obtain positional information of the intersections P of the rebars S for each bundling target from the image information obtained by the individual photographing unit, which information is more accurate than the positional information of each intersection P of the rebars S obtained by photographing the entire work B with the overall photographing unit, and move the binding device 100 with the robot arm 300.

[0088] <Example of operation of the binding device according to this embodiment> 4A, 4B, 4C, and 4D are side views showing an example of the operation of the binding device of this embodiment, with some components omitted.

[0089] In the binding device 100, depending on the direction of rotation of the motor 25d, the first slack forming unit 21 and the second slack forming unit 22 move relatively away from each other from the standby position shown in Figures 1A, 1B, etc. to the slack forming position shown in Figure 4A, and also move relatively closer to each other from the slack forming position shown in Figure 4A to the standby position shown in Figure 4B.

[0090] In the binding device 100, when the first slack forming unit 21 moves from the standby position to the slack forming position, the first slack forming roller 21a moves in a direction approaching the rebar binding machine 1. When the first slack forming roller 21a moves in a direction approaching the rebar binding machine 1, the guide surface 21f comes into contact with the wire W, and pulls the portion of the wire W in contact with the guide surface 21f in a direction approaching the rebar binding machine 1.

[0091] In the binding device 100, when the second slack forming unit 22 moves from the standby position to the slack forming position, the second slack forming roller 22a moves in a direction away from the rebar binding machine 1. When the second slack forming roller 22a moves in a direction away from the rebar binding machine 1, the guide surface 22f comes into contact with the wire W, and pulls the portion of the wire W in contact with the guide surface 22f in a direction away from the rebar binding machine 1.

[0092] The wire W entering the rebar binding machine 1 is clamped between a pair of feed gears 30. The pair of feed gears 30 are prevented from rotating due to an external force while the drive of a feed motor (not shown) is stopped. As a result, even if the second slack forming roller 22a moves in a direction away from the rebar binding machine 1 and a force is applied to the portion of the wire W in contact with the guide surface 22f in a direction away from the rebar binding machine 1, the wire W is prevented from being pulled out from between the pair of feed gears 30.

[0093] The path of the wire W pulled out from the reel 20 is changed by the first guide portion 23 between the reel 20 and the first slack forming roller 21a toward the slack forming portion 2. As a result, the first slack forming roller 21a moves in a direction approaching the rebar binding machine 1, and the portion of the wire W in contact with the guide surface 21f is pulled in a direction approaching the rebar binding machine 1, thereby applying a force to pull the wire W out from the reel 20.

[0094] In addition, when the second slack forming roller 22a moves in a direction away from the rebar binding machine 1, the portion of the wire W in contact with the guide surface 22f is pulled in a direction away from the rebar binding machine 1, and a force is applied via the first slack forming roller 21a to pull the wire W out from the reel 20.

[0095] The reel 20 can rotate when a force is applied to pull out the wire W. As a result, the wire W is pulled out from the reel 20 when the first slack forming roller 21a moves in a direction toward the rebar binding machine 1 and the second slack forming roller 22a moves in a direction away from the rebar binding machine 1.

[0096] In the binding device 100, when the first slack forming unit 21 moves from the slack forming position to the standby position, the first slack forming roller 21a moves in a direction away from the rebar binding machine 1. When the first slack forming roller 21a moves in a direction away from the rebar binding machine 1, the guide surface 21f moves away from the wire W. Furthermore, in the binding device 100, when the second slack forming unit 22 moves from the slack forming position to the standby position, the second slack forming roller 22a moves in a direction approaching the rebar binding machine 1. When the second slack forming roller 22a moves in a direction approaching the rebar binding machine 1, the guide surface 22f moves away from the wire W. As a result, a slack portion WB is formed in the wire W between the reel 20 and the rebar binding machine 1.

[0097] The second slack forming unit 22 is supported by the second guide unit 22i so that the guide surface 22f is located on an extension of the feed path WL of the wire W entering the rebar binding machine 1, which is defined by the wire feed unit 3, the wire guide 4, etc. The second slack forming unit 22 is also guided by the second guide unit 22i so that it can move in a direction along the feed path WL of the wire W entering the rebar binding machine 1. This prevents the wire W entering the rebar binding machine 1 from changing significantly with respect to the feed path WL when the second slack forming unit 22 moves from the standby position to the slack forming position, and from the slack forming position to the standby position.

[0098] When the first slack forming unit 21 moves from the slack forming position to the standby position, the guide member 21c guides the wire W between the pair of guide plates 21b. As a result, the pair of guide plates 21b prevent the wire W entering the first slack forming unit 21 from moving in the axial direction of the first slack forming roller 21a. This prevents the wire W entering the first slack forming unit 21 from becoming tangled in the first guide unit 23, etc. Furthermore, in a configuration in which two wires W are used to bind the rebar S, the two wires W are prevented from becoming tangled in the slack forming unit 2.

[0099] Furthermore, the wire W emerging from the first slack forming portion 21 is guided between the pair of guide plates 21b by the guide member 21d. As a result, the pair of guide plates 21b prevent the wire W emerging from the first slack forming portion 21 from moving in the axial direction of the first slack forming roller 21a. Furthermore, the guide member 21d prevents the wire W emerging from the first slack forming portion 21 from moving toward the second slack forming portion 22. Therefore, the wire W emerging from the first slack forming portion 21 is prevented from becoming tangled with the second slack forming portion 22, etc. Furthermore, in a configuration in which the reinforcing bars S are bound with two wires W, the two wires W are prevented from becoming tangled in the slack forming portion 2.

[0100] Furthermore, the wire W entering the second slack forming unit 22 is guided between the pair of guide plates 22b by the guide member 22c. As a result, the pair of guide plates 22b prevent the wire W entering the second slack forming unit 22 from moving in the axial direction of the second slack forming roller 22a. Also, the guide member 22c prevents the wire W entering the second slack forming unit 22 from moving toward the first slack forming unit 21. Therefore, the wire W entering the second slack forming unit 22 is prevented from becoming entangled with the first slack forming unit 21, etc. Furthermore, in a configuration in which two wires W are used to bind the reinforcing bars S, the two wires W are prevented from becoming entangled in the slack forming unit 2.

[0101] Furthermore, the wire W coming out of the second slack forming unit 22 is guided between the pair of guide plates 22b by the guide member 22d. As a result, the pair of guide plates 22b prevent the wire W coming out of the second slack forming unit 22 from moving in the axial direction of the second slack forming roller 22a. Therefore, in a configuration in which the reinforcing bars S are bound with two wires W, entanglement of the two wires W in the slack forming unit 2 is prevented.

[0102] As shown in Fig. 4B, when slack WB is formed in the wire W by the slack forming unit 2, the rebar tying machine 1 feeds the wire W in the positive direction indicated by the arrow F by the wire feeding unit 3 shown in Fig. 2, and winds the wire W around the rebar S by the curl forming unit 5. When the wire feeding unit 3 feeds the wire W in the positive direction indicated by the arrow F, the slack portion WB of the wire W is fed as shown in Fig. 4C. As a result, the force used by the wire feeding unit 3 to feed the wire W in the positive direction indicated by the arrow F does not need to rotate the reel 20, reducing the load on the wire feeding unit 3 and suppressing the occurrence of poor wire feeding by the wire feeding unit 3.

[0103] In order to wind the wire W wound around the reinforcing bar S, the wire feeding unit 3 feeds the wire W in the reverse direction indicated by the arrow R, and as shown in Fig. 4D, a slack portion WB is formed in accordance with the amount of wire W fed in the reverse direction. This eliminates the need to rotate the reel 20 with the force of the wire feeding unit 3 feeding the wire W in the reverse direction indicated by the arrow R, thereby reducing the load on the wire feeding unit 3 and suppressing the occurrence of poor wire feeding by the wire feeding unit 3.

[0104] In the binding device 100 in which the reel 20 wound with the wire W is provided outside the reinforcing bar binding machine 1, the reel 20 can be made larger than the size of a reel that can be loaded into a conventional hand-held reinforcing bar binding machine, thereby increasing the capacity of the wire W. In this configuration in which the reel 20 is provided outside the reinforcing bar binding machine 1, the distance between the reel 20 and the reinforcing bar binding machine 1 is longer than in a configuration in which the reel 20 is housed inside the reinforcing bar binding machine 1.

[0105] As a result, the wire W in the portion pulled out from the reel 20 is more likely to become slack between the reel 20 and the rebar binding machine 1. In the binding device 100, a slack forming unit 2 is provided between the reel 20 and the rebar binding machine 1, and the path along which the wire W pulled out from the reel 20 passes is directed toward the slack forming unit 2 by the first guide unit 23. As a result, the wire W in the portion pulled out from the reel 20 is more likely to become slack between the reel 20 and the first guide unit 23.

[0106] Furthermore, the reel 20 is not configured to rotate by itself when driven by a driving force. Therefore, when the wire W is fed in the reverse direction to wind the wire W around the reinforcing bar S, the reel 20 does not rotate, or rotates with difficulty, following the reverse feeding of the wire W. Therefore, even when the wire W is fed in the reverse direction, slack is likely to occur in the portion of the wire W pulled out from the reel 20 between the reel 20 and the first guide portion 23.

[0107] Furthermore, in the binding device 100, the slack forming unit 2 unwinds the wire W from the reel 20, forms a slack portion WB corresponding to the amount of wire W required for the operation of binding the reinforcing bars S with the reinforcing bar binding machine 1, and then the operation of binding the reinforcing bars S is performed with the reinforcing bar binding machine 1. When the slack forming unit 2 unwinds the wire W from the reel 20 to form a slack portion WB, the length of the wire W between the reinforcing bar binding machine 1 and the reel 20 becomes longer compared to when the slack portion WB is not formed. Therefore, even when the slack forming unit 2 unwinds the wire W from the reel 20, slack is likely to occur in the portion of the wire W unwound from the reel 20 between the reel 20 and the first guide unit 23.

[0108] If the portion of the wire W unwound from the reel 20 loosens outward in the release direction opposite to the winding direction of the wire W around the reel 20, the wire W may come off the flange portion 20b. If the wire W is next fed in the forward direction after coming off the flange portion 20b, the wire W may become tangled around the flange portion 20b, etc., and poor feeding of the wire W may occur.

[0109] It is also possible to configure the reel 20 with a cover or the like around the reel 20 to prevent the wire W from coming off the flange portion 20b. However, if the cover that covers the enlarged reel 20 also becomes larger, this will lead to an increase in the weight of the binding device 100. Furthermore, the wire W may become caught between the reel 20 and the cover, which may again result in poor feeding of the wire W. For this reason, the reel 20 is not configured with a cover or the like around the reel 20.

[0110] Therefore, a wire guide portion 26 is provided between the reel 20 and the first guide portion 23. The wire guide portion 26 is provided inside the winding direction of the wire W, which is the direction in which the wire W is wound around the reel 20, with respect to a second imaginary line L2, which is a tangent to an imaginary circle of radius r2, which is the minimum winding diameter of the wire W.

[0111] When the winding diameter of the wire W wound on the reel 20 is at its maximum, the portion of the wire W pulled out from the reel 20 is guided by the wire guide section 26 so as to pass on the inside, which is the direction in which the wire W is wound on the reel 20, of a first virtual line L1, which is a tangent to a virtual circle of radius r1, which is the maximum winding diameter of the wire W.

[0112] This prevents the portion of the wire W that has been pulled out from the reel 20 from loosening outward when the winding of the wire W around the reel 20 is released.

[0113] Therefore, even if a slack portion WB is formed in the wire W between the reel 20 and the first guide portion 23, the wire W is prevented from coming off the flange portion 20b. Furthermore, even if the winding diameter of the wire W wound around the reel 20 is at or near the maximum, the wire W is prevented from coming off the flange portion 20b. Therefore, when the wire W is next fed in the forward direction after coming off the flange portion 20b, the wire W is prevented from becoming tangled around the flange portion 20b, etc.

[0114] The wire guide portion 26 is provided within the range of the spacing between the pair of flange portions 20b of the reel 20 in the path along which the wire W passes as it is pulled out from the reel 20 and leads from the reel 20 to the first guide portion 23. This prevents the wire W guided by the wire guide portion 26 from coming into contact with the flange portions 20b, thereby preventing damage to the wire W and the flange portions 20b.

[0115] Furthermore, the wire guide portion 26 is annular, and the wire W passes through the inside of the annulus. This prevents the wire W from coming off the wire guide portion 26.

[0116] Furthermore, in a configuration in which the reinforcing bar binding machine 1 binds reinforcing bars S with multiple wires W, the reel storage unit 200 stores multiple reels 20 corresponding to the number of wires W. For example, in a configuration in which the reinforcing bar binding machine 1 binds reinforcing bars S with two wires W, the reel storage unit 200 stores two reels 20 each with one wire W wound thereon, and each reel 20 is configured to be able to pull out two wires W as it rotates. This prevents multiple wires W from becoming tangled in one reel 20.

[0117] Furthermore, a plurality of wire guide portions 26 are provided for the plurality of reels 20, and each wire guide portion 26 is provided in a path through which the wire W drawn out from each reel 20 passes. This prevents the plurality of wires W guided by the wire guide portions 26 from becoming tangled.

[0118] Furthermore, the binding device 100 is configured so that the reinforcing bar binding machine 1, the slack forming unit 2, the reel housing unit 200, the first guide unit 23, and the wire guide unit 26 can move as a single unit. This prevents the positional relationship between the reel 20 and the wire guide unit 26 from changing when the binding device 100 moves, and prevents the wire W from coming off the flange unit 20b.

[0119] <Modifications of the binding device of this embodiment> Figure 5A is a side view showing a modified example of the binding device of this embodiment, with some parts omitted, Figure 5B is an oblique view showing a modified example of the binding device of this embodiment, Figure 5C is a rear view showing a modified example of the binding device of this embodiment, and Figure 5D is a side view from the back showing a modified example of the binding device of this embodiment.

[0120] The binding device 100B shown in Figure 5A etc. comprises the above-mentioned rebar binding machine 1, a slack forming unit 2, a reel storage unit 200 in which the reel 20 is stored, a first guide unit 23, a second guide unit 24, and a drive unit 25.

[0121] The above-mentioned binding device 100 shown in Figure 1A, etc. is configured to have one wire guide portion 26 per wire W between the reel 20 and the first guide portion 23, but it may also be configured to have multiple wire guide portions 26 along the path of the wire W.

[0122] The binding device 100B includes a first wire guide portion 26a and a second wire guide portion 26b along the path of the wire W between the reel 20 and the first guide portion 23.

[0123] For example, in a configuration including a first wire guide portion 26a and a second wire guide portion 26b as two wire guide portions, at least the first wire guide portion 26a closer to the reel 20 is provided on the inside of the first imaginary line L1 and the second imaginary line L2 in the winding direction of the wire W, which is the direction in which the wire W is wound around the reel 20. As a result, the first wire guide portion 26a comes into contact with the wire W from the outside in the releasing direction, which is opposite to the winding direction of the wire W around the reel 20.

[0124] The first wire guide portion 26a is provided within the range of the interval between the pair of flange portions 20b of the reel 20 in the path along which the wire W passes as it is pulled out from the reel 20 and reaches the first guide portion 23 from the reel 20.

[0125] The second wire guide portion 26b, which is on the side away from the reel 20 compared to the first wire guide portion 26a, may be arranged on the first virtual line L1, or may be arranged inside the winding direction of the wire W relative to the first virtual line L1 and the second virtual line L2.

[0126] As a result, the wire W at the portion pulled out from the reel 20 is prevented from slackening outward as the winding of the wire W around the reel 20 is released, and is prevented from doing so mainly by the first wire guide portion 26a on the side closer to the reel 20, and mainly by the second wire guide portion 26b on the side closer to the first guide portion 23.

[0127] Therefore, even if slack occurs in the wire W between the reel 20 and the first guide portion 23, the wire W is prevented from coming off the flange portion 20b. Therefore, when the wire W is next fed in the forward direction after coming off the flange portion 20b, the wire W is prevented from becoming tangled around the flange portion 20b, etc. [Explanation of symbols]

[0128] 100, 100B... Binding device, 101... Binding machine support portion, 102... Storing portion support portion, 103... Slack forming portion support portion, 104... Support portion, 105... Mounting portion, 1... Reinforcing bar binding machine (binding machine), 2... Slack forming portion, 20... Reel (wire support portion), 20a... Core (circumferential portion), 20b... Flange portion (protrusion prevention portion), 200... Reel accommodating section, 21... first slack forming section (slack forming mechanism section), 21a... first slack forming roller, 21b... guide plate, 21c, 21d... guide member, 21f... guide surface, 21g... shaft, 21h... shaft, 21i... first guide section, 22... second slack forming section (slack forming mechanism section), 22a... second slack forming roller pulley, 22b guide plate, 22c, 22d guide member, 22f guide surface, 22g shaft, 22h shaft, 22i second guide portion, 23 first guide portion (wire support portion), 23a pulley (circumferential surface portion), 23b guide plate (jump-out prevention portion), 24 second guide portion, 25 drive portion, 25a , 25b... pulley, 25c... belt, 25d... motor, 25e... first connecting portion, 25f... second connecting portion, 26... wire guide portion, 26a... first wire guide portion, 26b... second wire guide portion, 250... control portion, 250a... substrate accommodating portion, 300... robot arm (moving body), 301... binding system

Claims

1. A binding device for binding a plurality of reinforcing bars with wire, two wire supports located in the wire path; a wire guide portion provided between the two wire support portions; One or both of the two wire support portions has a peripheral surface portion around which the wire is wound at least partially, and a protrusion prevention portion protruding from the peripheral surface portion, The wire guide portion contacts the wire from the outside in the winding direction of the wire relative to the peripheral surface portion. Binding device.

2. A binding device for binding a plurality of reinforcing bars with wire, two wire supports located in the wire path; a wire guide portion provided between the two wire support portions; One or both of the two wire support portions has a peripheral surface portion around which the wire is wound at least partially, and a protrusion prevention portion protruding from the peripheral surface portion, The wire guide portion is provided on the inner side of a tangent line connecting the outer peripheries of the wire wound around the two wire support portions, in a direction toward which the wire is wound around the peripheral surface portion. Binding device.

3. One of the two wire support parts is a reel on which the wire is wound, the peripheral surface part is a core on which the wire is wound, and the protrusion prevention part is a flange part protruding in the radial direction from both axial end parts of the core. The binding device according to claim 1 or 2.

4. The wire guide portion is provided within the range of the interval between the pair of flange portions. The binding device according to claim 3.

5. The wire guide portion is annular, and the wire passes through the inside of the annulus. The binding device according to claim 1 or 2.

6. A reel storage section is provided in which a plurality of reels are stored, The wire guide portion is provided in a plurality of positions corresponding to the plurality of reels accommodated in the reel accommodating portion. The binding device according to claim 1 or 2.

7. a bundling device for bundling a plurality of reinforcing bars with wire; a moving body that moves the binding device, The binding device is two wire supports located in the wire path; a wire guide portion provided between the two wire support portions; One or both of the two wire support portions has a peripheral surface portion around which the wire is wound at least partially, and a protrusion prevention portion protruding from the peripheral surface portion, The wire guide portion contacts the wire from the outside in the winding direction of the wire relative to the peripheral surface portion. Binding system.

8. a bundling device for bundling a plurality of reinforcing bars with wire; a moving body that moves the binding device, The binding device is two wire supports located in the wire path; a wire guide portion provided between the two wire support portions; One or both of the two wire support portions has a peripheral surface portion around which the wire is wound at least partially, and a protrusion prevention portion protruding from the peripheral surface portion, The wire guide portion is provided on the inner side of a tangent line connecting the outer peripheries of the wire wound around the two wire support portions, in a direction toward which the wire is wound around the peripheral surface portion. Binding system.

Images