Binding machine

Abstract

The reinforcing steel bar binding machine is provided with a curl guide for imparting curl marks to a plurality of binding wires. The curl guide is provided with a first binding wire guide that regulates the position of the binding wire toward the outer peripheral side in the radial direction of the endless conveyance path, a second binding wire guide that regulates the position of the binding wire toward one side in the axial direction of the endless conveyance path, and a third binding wire guide that regulates the position of the binding wire toward one side in the axial direction of the endless conveyance path. The third tie wire guide restricts the position of the tie wire toward the other side in the axial direction. In addition, the curl guide is provided with a suppression unit that suppresses one of the plurality of binding wires from moving in the direction toward the other binding wire.

Description

Technical Field

[0001] This disclosure relates to a binding machine that uses binding wire to bind materials such as reinforcing bars. Background Technology

[0002] In concrete structures, steel bars are used to increase strength and are tied with wire to prevent them from shifting from their designated positions during concrete pouring.

[0003] Previously, a binding machine was proposed that uses wire to tie two or more steel bars together, and then twists the wire to bind the two or more steel bars together.

[0004] When using tie wire to bind reinforcing bars, if the binding is loose, the bars will shift apart. Therefore, it is necessary to securely bind and hold the reinforcing bars together. Using thicker diameter tie wire ensures the binding strength of the reinforcing bars. However, using thicker diameter tie wire increases its rigidity, thus requiring greater force to bind the reinforcing bars.

[0005] Therefore, a strapping machine is proposed, comprising: a conveying unit capable of conveying two or more binding wires and winding them around the bundled object; and a strapping unit capable of strapping the bundled object by holding and twisting the two or more binding wires wound around the bundled object by the conveying unit, wherein the conveying unit conveys the two or more binding wires side by side in the axial direction of the conveying path of the binding wires forming a loop (for example, see Patent Document 1).

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent No. 6791141 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In a strapping machine that feeds two or more binding wires side by side, when any one of the binding wires moves toward the other wires within the coiling guide that instills curls in the wires, it affects the airborne posture of the wire after it leaves the coiling guide. If the airborne posture of the wire deviates, it causes a deviation towards the landing point of the guiding guide, which guides the wire toward the strapping unit.

[0011] If the diameter of the reinforcing bars bound by the wire increases, the diameter of the wire feed path, which is wound in a loop around the reinforcing bar, needs to be increased. However, the larger the diameter of the loop feed path, the greater the deviation from the landing point of the guide. Therefore, the wire may not be able to enter the guide. Conversely, if the wire is to be allowed to enter the guide by increasing its size, the binding machine will become larger and heavier, potentially worsening its operability.

[0012] This disclosure was made to solve such a problem, and its purpose is to provide a strapping machine capable of suppressing the movement of any one of the multiple straps in a coiling guide toward the other straps.

[0013] Methods for solving problems

[0014] One aspect of this disclosure is a binding machine comprising: a wire conveying section for conveying multiple binding wires; a coiling forming section forming an annular conveying path that winds the multiple binding wires conveyed by the wire conveying section around the bundled object; and a binding section for twisting the multiple binding wires wrapped around the bundled object. The coiling forming section comprises: a coiling guide for applying curl marks to the multiple binding wires conveyed by the wire conveying section; and an induction guide for guiding the multiple binding wires with curl marks applied by the coiling guide toward the binding section. The coiling guide comprises a first binding wire guide, a second binding wire guide, and a third binding wire guide. The guide includes a first wire guide that radially restricts the position of the wires towards the radial outer periphery relative to the annular transport path, a second wire guide that axially restricts the position of the wires towards one side of the annular transport path, and a third wire guide that restricts the position of the wires towards the other side of the annular transport path. The coiling guide enables multiple wires to be arranged in contact with each other along the annular transport path between the second and third wire guides, and includes a suppressing part that suppresses one of the multiple wires from moving towards the other wires.

[0015] In this disclosure, the suppressing part suppresses one of the multiple wires that are conveyed from the wire conveying part to the coiling forming part and arranged axially between the second wire guide and the third wire guide along the annular conveying path from moving toward the other wires.

[0016] Invention Effects

[0017] In this disclosure, by suppressing the movement of one of the multiple binding wires arranged between the second and third binding wire guides toward the other binding wires, the alteration of the arrangement order of the multiple binding wires arranged axially along the annular conveying path can be suppressed. This stabilizes the attitude of the binding wires in the air after they are fed from the coiling guide. Therefore, even if the diameter of the annular conveying path increases, multiple binding wires can be conveyed from the coiling guide into the induction guide without increasing the size of the induction guide. Thus, the increase in the size and weight of the binding machine can be suppressed, and the deterioration of operability can be prevented. Attached Figure Description

[0018] Figure 1A This is an internal structural diagram viewed from the side, showing an example of the overall structure of the rebar tying machine of this embodiment.

[0019] Figure 1B This is an internal structural diagram viewed from the front, showing an example of the overall structure of the rebar tying machine of this embodiment.

[0020] Figure 1C This is a side view showing an example of the overall structure of the rebar tying machine according to this embodiment.

[0021] Figure 2 This is a side view showing an example of a curling guide after a portion of the component has been removed.

[0022] Figure 3A This is a side view showing an example of a curling guide.

[0023] Figure 3B yes Figure 3A BB line section view.

[0024] Figure 3C yes Figure 3A CC-line sectional view.

[0025] Figure 3D This is a top view showing an example of a curling guide.

[0026] Figure 4 This is a side view showing another example of a curling guide with a portion of the component removed.

[0027] Figure 5A This is a side view showing another example of a curling guide.

[0028] Figure 5B yes Figure 5A DD-line sectional view.

[0029] Figure 6 This is a side view showing a modified example of a curled guide with a portion of the component removed.

[0030] Figure 7 This is a side view showing another example of a curling guide with a portion of the component removed.

[0031] Figure 8A This is a side view showing another example of a curling guide.

[0032] Figure 8B yes Figure 8A EE line section view.

[0033] Figure 8C yes Figure 8A FF line section view. Detailed Implementation

[0034] Hereinafter, with reference to the accompanying drawings, an example of a rebar tying machine as an embodiment of the tying machine of this disclosure will be described.

[0035] <Structural Example of the Rebar Binding Machine in This Embodiment>

[0036] Figure 1A This is an internal structural diagram viewed from the side, showing an example of the overall structure of the rebar tying machine according to this embodiment. Figure 1B This is an internal structural diagram viewed from the front, showing an example of the overall structure of the rebar tying machine according to this embodiment. Figure 1C This is a side view showing an example of the overall structure of the rebar tying machine according to this embodiment.

[0037] The rebar tying machine 1A is a handheld type, comprising a main body 10 and a handle 11. The rebar tying machine 1A feeds binding wire W in the forward direction (indicated by arrow F) and winds it around the rebar S, which is to be tied. Then, it feeds the binding wire W around the rebar S in the reverse direction (indicated by arrow R) and winds it around the rebar S again. Finally, it twists the binding wire W to tie the rebar S. The rebar tying machine 1A uses multiple binding wires W, in this example two binding wires W, to tie the rebar S.

[0038] To achieve the above functions, the rebar tying machine 1A includes a hopper 2 for receiving tie wires W, a tie wire conveying section 3 for conveying two tie wires W radially along the tie wires W at a time, and a tie wire guiding section 4 for guiding the two tie wires W conveyed towards the tie wire conveying section 3. Furthermore, the rebar tying machine 1A includes a coiling forming section 5 that forms an annular conveying path for winding the two tie wires W conveyed by the tie wire conveying section 3 around the rebar S once; and a cutting section 6 for cutting the two tie wires W wrapped around the rebar S. Moreover, the rebar tying machine 1A includes a binding section 7 for twisting the two tie wires W wrapped around the rebar S and a driving section 8 for driving the binding section 7. It should be noted that the annular conveying path for winding the two tie wires W conveyed by the tie wire conveying section 3 around the rebar S once is the path for conveying the tie wires when the two tie wires are wound around the bundle once.

[0039] The hopper 2 is an example of a receiving unit, which can rotate and load / unload a reel 20 that is wound into a long strip shape to release the binding wire W. The binding wire W is made of metal wire that can be plastically deformed, metal wire coated with resin, or stranded wire.

[0040] The reel 20 has a cylindrical hub portion 21 for winding tie wires W and a pair of flange portions 22, 23 integrally provided on both axial ends of the hub portion 21. The flange portions 22, 23 are formed into a generally circular plate shape with a diameter larger than that of the hub portion 21, and are arranged concentrically with the hub portion 21. The reel 20 winds two tie wires W around the hub portion 21, and pulls out the two tie wires W simultaneously from the reel 20.

[0041] like Figure 1B As shown, the rebar tying machine 1A is installed with the reel 20 offset in one direction relative to the conveying path FL of the tie wire W specified by the tie wire conveying unit 3 and the tie wire guiding unit 4, and the axial direction of the reel 20 is along the axial direction of the hub 21.

[0042] The wire binding conveyor 3 includes a pair of conveying gears 30 (30L, 30R) that clamp and convey two parallel wire binding strands W. The wire binding conveyor 3 transmits the rotational motion of the conveying motor 31 to one of the conveying gears 30L. Furthermore, through the meshing of gear portions provided on the outer periphery of the conveying gears 30L and 30R, the rotational motion of one conveying gear 30L is transmitted to the other conveying gear 30R. Thus, one conveying gear 30L becomes the driving side, and the other conveying gear 30R becomes the driven side.

[0043] The wire binding conveyor 3 arranges two wire bindings W side-by-side along the direction of a pair of conveying gears 30L and 30R. In the wire binding conveyor 3, one wire binding W contacts the groove of one conveying gear 30L, and the other wire binding W contacts the groove of the other conveying gear 30R; the two wire bindings also contact each other. Thus, the wire binding conveyor 3, by rotating the pair of conveying gears 30 (30L, 30R), utilizes the friction generated between one conveying gear 30L and one wire binding W, the friction generated between the other conveying gear 30R and the other wire binding W, and the friction generated between the two wire bindings W, to convey the two wire bindings W clamped between the pair of conveying gears 30 (30L, 30R) along the extending direction of the wire bindings W.

[0044] In addition, the wire conveying unit 3 switches the rotation direction of the conveying gear 30 by switching the rotation direction of the conveying motor 31, thereby switching the forward and reverse conveying direction of the wire W.

[0045] The wire guide 4 is positioned upstream and downstream of the conveying gear 30 relative to the conveying direction of the wire W being conveyed in the positive direction. The wire guide 4 guides the two incoming wires W to be arranged side by side along the arrangement direction of the pair of conveying gears 30 and between the pair of conveying gears 30.

[0046] The wire guide 4 is configured such that, relative to the conveying direction of the wire W being conveyed in the forward direction, the opening on the upstream side has a larger opening area than the opening on the downstream side, and part or all of the inner surface of the opening is conical. This allows for easy insertion of the wire W pulled from the reel 20 stored in the hopper 2 into the wire guide 4.

[0047] The curling forming section 5 includes: a curling guide 50a, which applies curl marks to two binding wires W conveyed by the binding wire conveying section 3 and restricts the movement of each binding wire W in the direction where the two binding wires W are parallel; and an induction guide 50b, which guides the two binding wires W, which have been curled by the curling guide 50a, toward the binding section 7. The curling forming section 5 forms a coiled shape by applying curl marks to the two binding wires W conveyed by the binding wire conveying section 3 and passing through the curling guide 50a, thereby reaching the binding section 7 from the curling guide 50a via the induction guide 50b. Figure 1A The circular conveying path Ru is shown by the double-dotted line. The curling guide 50a inhibits the movement of one of the two binding wires W toward the other binding wire. Furthermore, the curling guide 50a uses the binding wire of one of the two binding wires W to inhibit the movement of the other binding wire W toward the first binding wire. Thus, the curling guide 50a inhibits the reversal of the arrangement order of the two binding wires W conveyed by the binding wire conveying unit 3 in a manner aligned axially along the circular conveying path Ru.

[0048] The cutting part 6 includes a fixed blade part 60, a movable blade part 61 that cuts the binding wire W by cooperating with the fixed blade part 60, and a transmission mechanism 62 that transmits the movement of the binding part 7 to the movable blade part 61.

[0049] The binding section 7 includes a wire clamping body 70 for securing the binding wire W and a sleeve 71 for operating the wire clamping body 70. The drive section 8 includes a torsion motor 80 and a reducer 81 for deceleration and torque amplification.

[0050] The rebar tying machine 1A has a conveying restriction section 90 at the end of the conveying path of the tying wire W, which passes through the circular conveying path Ru and is secured by the tying wire clamp 70, for the front end of the tying wire W to abut against. Furthermore, the coiling guide 50a and the guiding guide 50b of the coiling forming section 5 of the rebar tying machine 1A are provided at the front end of the main body 10. Moreover, the abutment section 91 of the rebar tying machine 1A, for the rebar S to abut against, is provided at the front end of the main body 10 between the coiling guide 50a and the guiding guide 50b.

[0051] The handle 11 of the rebar tying machine 1A extends downward from the main body 10. Furthermore, a battery 15 is detachably installed at the lower part of the handle 11. In addition, the hopper 2 of the rebar tying machine 1A is located in front of the handle 11.

[0052] The rebar tying machine 1A has a trigger 12 on the front side of the handle 11 and a switch 13 inside the handle 11. In the rebar tying machine 1A, the control unit 100 controls the conveyor motor 31 and the torsion motor 80 according to the state of the switch 13 pressed by the operation of the trigger 12.

[0053] <Example of the main structural components of the rebar tying machine in this embodiment>

[0054] • Example of the structure of a curling guide

[0055] Figure 2 This is a side view showing an example of a curling guide after a portion of the component has been removed. Figure 3A This is a side view showing an example of a curling guide. Figure 3B yes Figure 3A BB line section view, Figure 3C yes Figure 3A CC line section view, Figure 3D This is a top view showing an example of a curling guide. Figure 2 This indicates the state after the second wire guide 52, which will be described later, has been removed. Next, referring to the figures, an example of the curling guide 50a will be explained.

[0056] The curling guide 50a has relative to Figure 2The first wire guide 51, which restricts the position of the wire W toward the radial outer periphery of the annular transport path Ru indicated by the middle arrow D1 along the circumference of the annular transport path Ru indicated by the arrow D2, is located in the radial direction of the annular transport path Ru.

[0057] In addition, the curling guide 50a has a relative Figure 3B , Figure 3C The second wire guide 52, which restricts the position of the wire W on one side of the axial direction of the annular conveying path Ru (indicated by arrow D3), along the circumference of the annular conveying path Ru (indicated by arrow D2).

[0058] Furthermore, the coiling guide 50a includes a third wire guide 53 that restricts the position of the wire W toward the other side of the axial direction of the annular transport path Ru as shown by arrow D3 along the circumference of the annular transport path Ru as shown by arrow D2.

[0059] In the coiling guide 50a, a first wire guide 51 is sandwiched between a second wire guide 52 and a third wire guide 53. The second wire guide 52 protrudes radially inward from the first wire guide 51 along the annular transport path Ru. The third wire guide 53 protrudes radially inward from the first wire guide 51 along the annular transport path Ru. Thus, the second wire guide 52 and the third wire guide 53 of the coiling guide 50a face each other with a gap equal to the thickness of the first wire guide 51. The gap Ra1 between the second wire guide 52 and the third wire guide 53 is more than twice the diameter R of the wire W.

[0060] It should be noted that the interval Ra1 between the second wire guide 52 and the third wire guide 53 can also be about 1.5 times or more the diameter R of the wire W. Furthermore, since the two wires W can be arranged axially along the annular conveying path Ru in a mutually contacting manner, the interval Ra1 between the second wire guide 52 and the third wire guide 53 can be set to about 1.9 times or more the diameter R of the wire W.

[0061] In the coiling guide 50a, the first wire guide 51, the second wire guide 52, and the third wire guide 53 do not bend axially toward the annular conveying path Ru indicated by arrow D3. The first wire guide 51, the second wire guide 52, and the third wire guide 53 extend linearly toward the discharge section 50e from which the wire W, conveyed in the positive direction by the wire conveying section 3, is discharged. The coiling guide 50a has a guide member 50g at the discharge section 50e. The guide member 50g is, for example, cylindrical. The second wire guide 52 has a hole 52h for pressing the guide member 50g into. The third wire guide 53 has a hole 53h for pressing the guide member 50g into. Furthermore, the first wire guide 51 has a recess 51h for inserting the guide member 50g. In the coiling guide 50a, when the first wire guide 51 is sandwiched between the second wire guide 52 and the third wire guide 53, the holes 52h and 53h are aligned with the recess 51h. Furthermore, the guide member 50g is pressed into the coiling guide 50a through the holes 52h and 53h, thereby exposing the circumferential surface of the guide member 50g relative to the guide surface of the first wire guide 51.

[0062] The coiling guide 50a includes a suppressing portion 54 that suppresses one of the multiple binding wires W, in this example one of two binding wires W, from moving toward the other binding wires W2. The suppressing portion 54 includes a guide portion 54a in the width direction of the first binding wire guide 51 along the axial direction of the annular transport path Ru indicated by arrow D3, and the guide portion 54a has a different height along the radial direction of the annular transport path indicated by arrow D1.

[0063] A guide portion 54a is disposed on the first wire guide 51. The guide portion 54a includes a slope 54b in the width direction of the first wire guide 51 along the axial direction of the annular transport path Ru indicated by arrow D3. This slope 54b is inclined radially outward along the annular transport path Ru indicated by arrow D1, on the opposite side to the side biased towards the reel 20, i.e., the second wire guide 52. Furthermore, the guide portion 54a is constructed of a concave curved surface, etc., along the circumference of the annular transport path Ru indicated by arrow D2.

[0064] The coiling guide 50a includes a parallel guide 55 that transports two wire binding threads W side-by-side along the axial direction of the annular transport path Ru indicated by arrow D3. The parallel guide 55 is disposed downstream of the suppression section 54 relative to the transport direction of the wire binding threads W transported in the positive direction indicated by arrow F. The parallel guide 55 is formed by a surface along the axial direction of the annular transport path Ru in the width direction of the first wire binding guide 51. The surface along the axial direction of the annular transport path Ru refers to the surface extending along the direction of the guide member 50g. Furthermore, the parallel guide 55 is formed by a concave curved surface, such as that along the annular transport path Ru, in the circumferential direction indicated by arrow D2. Alternatively, the circumferential surface of the cylindrical guide member 50g may be used as part of the parallel guide.

[0065] The radial height of the suppression section 54 along the annular conveying path Ru indicated by arrow D1 gradually changes as it moves toward the parallel guide section 55. That is, the guide section 54a gradually decreases in inclination from the upstream side toward the downstream side relative to the conveying direction of the wire W conveyed in the positive direction indicated by arrow F, and connects to the parallel guide section 55.

[0066] The suppression portion 54 is preferably provided in the circumferential direction of the annular transport path Ru, as indicated by arrow D2, covering at least 1 / 4 of the range of the annular transport path Ru. Furthermore, the suppression portion 54 is preferably provided on the upstream side of the coiling guide 50a, relative to the transport direction of the wire W being transported in the positive direction indicated by arrow F. The range of the guide portion 54a is approximately half the length of the coiling guide 50a in the circumferential direction of the annular transport path Ru, as indicated by arrow D2.

[0067] • Example of the effect of curling guide

[0068] In the rebar tying machine 1A, when the trigger 12 is operated, the conveying motor 31 is driven in the forward direction, and the two tying wires W are conveyed in the forward direction indicated by the arrow F through the tying wire conveying unit 3.

[0069] Two wires W, conveyed in the positive direction by the wire conveying section 3, pass through the wire guide section 4 at a position upstream of the coiling guide 50a, and become parallel to each other along the axial direction of the annular conveying path Ru.

[0070] Two binding wires W are conveyed in the positive direction to the coiling guide 50a of the coiling forming section 5. The two binding wires W pass through the coiling guide 50a and thus come into contact with the first binding wire guide 51, and are given coils that are wound around the reinforcing bar S along the annular conveying path Ru.

[0071] In order to facilitate the operation when inserting the two wires W wound on the reel 20 into a pair of conveying gears 30, in the state before use, they are connected as a whole by twisting, pressing or other means at their front ends.

[0072] The two wires W guided by the coiling guide 50a are oriented in a parallel direction by a pair of conveying gears 30 of the wire conveying section 3 and the wire guide 4.

[0073] If the distance Ra1 between the second wire guide 52 and the third wire guide 53 is more than twice the diameter of the wire W, then the front ends of the two wires W that are integrally connected can be brought between the second wire guide 52 and the third wire guide 53 by the action of the wire conveyor 3 conveying the wire W.

[0074] It should be noted that if the interval Ra1 between the second wire guide 52 and the third wire guide 53 is more than 1.5 times the diameter of the wire W, the front end portion of the two wires W that are integrally connected can enter between the second wire guide 52 and the third wire guide 53 in an axially inclined manner relative to the annular conveying path Ru shown by arrow D3.

[0075] like Figure 3B As shown, two tie wires W, passing side by side through the coiling guide 50a along the axial direction of the annular transport path Ru indicated by arrow D3, contact the guide portion 54a on the upstream side of the coiling guide 50a.

[0076] When the wire W1, which passes near the second wire guide 52, comes into contact with the guide 54a during the process of being conveyed by the wire conveying unit 3, the inclined surface 54b of the guide 54a inhibits its movement toward the third wire guide 53 as indicated by arrow D31.

[0077] Thus, the movement of one of the tie wires W1 toward the other tie wire W2, which is closer to the third tie wire guide 53, is suppressed, thereby preventing the exchange of positions between the two tie wires W between the second tie wire guide 52 and the third tie wire guide 53.

[0078] Additionally, one of the tie wires W1 is subjected to a force through the inclined surface 54b of the guide portion 54a, which is intended to move it in the direction toward the second tie wire guide 52 as indicated by arrow D32. When one of the tie wires W1 moves in the direction toward the second tie wire guide 52 as indicated by arrow D32, it comes into contact with the second tie wire guide 52, thereby restricting its axial movement in the annular conveying path Ru as indicated by arrow D3.

[0079] If the other wire W2 attempts to move in the direction indicated by arrow D32 toward the second wire guide 52, then the other wire W2 comes into contact with the first wire W1. The first wire W1 is thus restricted from axial movement along the annular transport path Ru indicated by arrow D3 by contacting the second wire guide 52. Therefore, further movement of the other wire W2 toward the second wire guide 52, as indicated by arrow D32, is inhibited by the first wire W1.

[0080] Therefore, the movement of the other wire W2 toward the wire W1 is suppressed, and the position swapping of the two wires W between the second wire guide 52 and the third wire guide 53 is suppressed.

[0081] like Figure 3C As shown, the two binding wires W of the coiling guide 50a contact the parallel guide portion 55 on the downstream side of the coiling guide 50a. The parallel guide portion 55 is formed by a surface along the axial direction of the annular conveying path Ru. In addition, the distance Ra1 between the second binding wire guide 52 and the third binding wire guide 53 is more than twice the diameter R of the binding wire W.

[0082] Thus, the two binding wires W are conveyed in the annular transport path Ru without changing their positions via the coiling guide 50a and the suppression section 54. Furthermore, the two binding wires W are arranged axially in the annular transport path Ru via the parallel guide 55 and the coiling guide 50a.

[0083] As described above, one of the tie wires W1 contacts the inclined surface 54b of the guide portion 54a, thereby inhibiting its movement in the direction towards the third tie wire guide 53 as indicated by arrow D31, and inhibiting its movement towards the other tie wire W2. Furthermore, by contacting the inclined surface 54b of the guide portion 54a, one of the tie wires W1 is subjected to a force that causes it to move in the direction towards the second tie wire guide 52 as indicated by arrow D32, and can move in the direction of arrow D32 to a position where it contacts the second tie wire guide 52. In other words, the inhibiting portion 54 including the guide portion 54a can be said to function as an inducing portion that guides one of the tie wires W1 towards the second tie wire guide 52. The other tie wire W2 contacts the inclined surface 54b of the guide portion 54a, thereby inhibiting its movement in the direction towards the third tie wire guide 53 as indicated by arrow D31. Furthermore, by contacting one of the tie wires W1, the other tie wire W2 is inhibited from moving in the direction towards the second tie wire guide 52 as indicated by arrow D32 via one of the tie wires W1. Therefore, the axial movement of one binding wire W1 and the other binding wire W2 along the annular conveying path Ru indicated by arrow D3 is suppressed. Consequently, the amount of lateral movement of the binding wire W within the coiling guide 50a is reduced. Therefore, the positional interchange of the two binding wires W that have been crimped by the coiling guide 50a due to the forward conveying of the binding wire W can be suppressed. Thus, the position of the binding wire W delivered from the coiling guide 50a is stable, the amount of lateral displacement is reduced, and the required width dimension of the guiding guide 50b can be suppressed.

[0084] Therefore, even if the diameter of the annular conveying path Ru increases, multiple binding wires W can still be conveyed from the coiling guide 50a into the induction guide 50b. Thus, without increasing the size of the induction guide 50b, the increase in the size and weight of the rebar binding machine 1A can be prevented, and the deterioration of operability can be suppressed.

[0085] It should be noted that the parallel guide portion 55 extends approximately perpendicularly to the plate-shaped members constituting the first wire-tying guide 51, the second wire-tying guide 52, and the third wire-tying guide 53 along the axial direction of the annular transport path Ru indicated by arrow D3. The coiling guide 50a has a parallel guide portion 55 and a guide member 50g at the discharge portion 50e in the circumferential direction of the annular transport path Ru indicated by arrow D2. Therefore, when the guide member 50g is pressed into the hole 52h of the second wire-tying guide 52, the recess 51h of the first wire-tying guide 51, and the hole 53h of the third wire-tying guide 53, a force is applied approximately perpendicularly to the surface of the plate-shaped members constituting the second wire-tying guide 52. Therefore, the guide member 50g is easily provided.

[0086] Alternatively, the guide portion 54a may be constructed as an inclined surface that slopes outward in the radial direction of the annular transport path Ru as shown by arrow D1, in the width direction of the first wire guide 51 along the axial direction of the annular transport path Ru indicated by arrow D3, toward the third wire guide 53. In other words, the suppression portion 54 including the guide portion 54a may also function as an induction portion that guides one of the multiple wires toward the third wire guide 53. Furthermore, the guide portion 54a may also be constructed as an inclined surface that slopes outward in the radial direction of the annular transport path Ru as shown by arrow D1, in the width direction of the first wire guide 51 along the axial direction of the annular transport path Ru indicated by arrow D3, from near the center toward the second wire guide 52, and an inclined surface that slopes outward in the radial direction of the annular transport path Ru as shown by arrow D1, from near the center toward the third wire guide 53. In other words, the inhibition part 54, including the guide part 54a, can also function as an induction part that guides one of the multiple tie wires toward the second tie wire guide 52 or the third tie wire guide 53.

[0087] Other structural examples of curling guides

[0088] Figure 4 This is a side view showing another example of a curling guide after a portion of the component has been removed. Figure 5A This is a side view showing another example of a curling guide. Figure 5B yes Figure 5A DD-line sectional view. Figure 4 This indicates the state after the second wire guide 52 has been removed. Next, referring to the figures, another example of the curling guide 50c will be explained.

[0089] The curling guide 50c includes a first wire guide 51c, which is relative to... Figure 4 The radial direction of the annular conveying path Ru, indicated by the middle arrow D1, restricts the position of the tie wire W on the radially outer periphery along the circumferential direction of the annular conveying path Ru, indicated by the arrow D2.

[0090] In the curling guide 50c, relative to Figure 5B The first wire guide 51c is sandwiched between the second wire guide 52 and the third wire guide 53 along the axial direction of the annular conveying path Ru indicated by the middle arrow D3. Thus, the second wire guide 52 and the third wire guide 53 of the coiled guide 50c face each other, separated by a thickness of the first wire guide 51c. The distance Ra1 between the second wire guide 52 and the third wire guide 53 is more than twice the diameter R of the wire W.

[0091] The coiling guide 50c includes a suppressing portion 56 that suppresses one of the multiple binding wires W, in this example, one of the two binding wires W, from moving toward the other binding wire W2. The suppressing portion 56 includes a guide portion 56a in the width direction of the first binding wire guide 51c along the axial direction of the annular transport path Ru indicated by arrow D3. The guide portion 56a has a different height along the radial direction of the annular transport path indicated by arrow D1.

[0092] A guide portion 56a is provided on the first wire guide 51c. In the width direction of the first wire guide 51c along the axial direction of the annular transport path Ru (indicated by arrow D3), the guide portion 56a, at least on one side near the second wire guide 52 (in this example, approximately half of the side near the second wire guide 52), is formed by an inclined surface 56b that slopes outward in the radial direction of the annular transport path Ru (indicated by arrow D1) toward the second wire guide 52. It should be noted that approximately half of the guide portion 56a on the side near the third wire guide 53 can also be formed by an inclined surface that slopes outward in the radial direction of the annular transport path Ru (indicated by arrow D1) toward the third wire guide 53. The guide portion 56a has an inclined surface 56b formed throughout the entire circumferential direction of the annular transport path Ru (indicated by arrow D2). Furthermore, the guide portion 56a is formed by a concave curved surface or the like along the annular transport path Ru in the circumferential direction of the annular transport path Ru (indicated by arrow D2).

[0093] Figure 6 This is a side view showing a modified example of a curling guide after a portion of the component has been removed. Figure 6 It means it has been removed. Figure 5B The state of the second wire guide 52 is shown in the figure. The curling guide 50c2 includes a first wire guide 51c2, which is relative to... Figure 6 The radial direction of the annular transport path Ru, indicated by the middle arrow D1, restricts the position of the tie wire W towards the radially outer periphery along the circumferential direction of the annular transport path Ru, indicated by the arrow D2. The first tie wire guide 51c2 includes the aforementioned suppression portion 56, and the suppression portion 56 includes a guide portion 56a.

[0094] In the curling guide 50c2, in the circumferential direction of the annular transport path Ru indicated by arrow D2, the aforementioned guide portion 56a is formed near the discharge portion 50e of the curling guide 50c2. Furthermore, the curling guide 50c2 has parallel guide portions 57 formed at the discharge portion 50e.

[0095] The parallel guide section 57 is formed by a surface along the axial direction of the first wire guide 51c along the axial direction of the annular conveying path Ru, as indicated by arrow D3.

[0096] The guide section 56a is connected to the parallel guide section 57 in a manner that gradually decreases in inclination toward the downstream side, relative to the conveying direction of the wire W being conveyed in the positive direction indicated by arrow F.

[0097] The effects of the curling guides 50c and 50c2 are explained, such as... Figure 5B As shown, of the two wires W conveyed in the positive direction by the wire conveying unit 3 and passing through the coiling guides 50c and 50c2, the wire W1 closest to the second wire guide 52 comes into contact with the guide 56a. When one of the wires W1 comes into contact with the guide 56a during the conveying of the wires W by the wire conveying unit 3, the inclined surface 56b of the guide 56a inhibits movement toward the third wire guide 53 as indicated by arrow D31.

[0098] Thus, the movement of one wire W1 toward the other wire W2 is suppressed, and the position swapping of the two wires W between the second wire guide 52 and the third wire guide 53 is suppressed.

[0099] Furthermore, for one of the binding wires W1, a force is applied via the inclined surface 56b of the guide portion 56a to move it in the direction toward the second binding wire guide 52 as indicated by arrow D32. When one of the binding wires W1 moves in the direction toward the second binding wire guide 52 as indicated by arrow D32, it contacts the second binding wire guide 52, thereby restricting its axial movement toward the annular transport path Ru indicated by arrow D3.

[0100] If the other wire W2 attempts to move in the direction indicated by arrow D32 toward the second wire guide 52, then the other wire W2 comes into contact with the first wire W1. The first wire W1 is thus restricted from axial movement along the annular transport path Ru indicated by arrow D3 by contacting the second wire guide 52. Therefore, further movement of the other wire W2 toward the second wire guide 52, as indicated by arrow D32, is inhibited by the first wire W1.

[0101] Therefore, the movement of the other wire W2 toward the wire W1 is suppressed, and the position swapping of the two wires W between the second wire guide 52 and the third wire guide 53 is suppressed.

[0102] Therefore, the two wires W are induced to switch positions in the axial direction of the annular transport path Ru by means of the coiling guides 50c and 50c2, which is suppressed by the suppression part 56.

[0103] As described above, one of the tie wires W1 contacts the inclined surface 56b of the guide portion 56a, thereby suppressing its movement in the direction toward the third tie wire guide 53 as shown by arrow D31, and suppressing its movement toward the other tie wire W2. Furthermore, for one of the tie wires W1, by contacting the inclined surface 56b of the guide portion 56a, a force is applied to move it in the direction toward the second tie wire guide 52 as shown by arrow D32, enabling it to move in the direction of arrow D32 to a position where it contacts the second tie wire guide 52. In other words, the suppressing portion 56 including the guide portion 56a can be said to function as an induction portion that guides one of the tie wires W1 toward the second tie wire guide 52. The other tie wire W2, by contacting one of the tie wires W1, is suppressed from moving in the direction toward the second tie wire guide 52 as shown by arrow D32. Therefore, the axial movement of one of the tie wires W1 and the other tie wire W2 toward the annular transport path Ru shown by arrow D3 is suppressed. Therefore, the lateral movement of the binding wire W within the coiling guides 50c and 50c2 is reduced. This prevents the positional interchange of the two binding wires W that have developed curls due to the forward feeding action of the binding wire W. Consequently, the position of the binding wire W fed from the coiling guides 50c and 50c2 is stabilized, and the amount of lateral displacement is reduced, thus suppressing the required width dimension of the induction guide 50b. It should be noted that the suppression part 56, including the guide part 56a, can also function as an induction part that guides one of the multiple binding wires toward the third binding wire guide 53.

[0104] Figure 7 This is a side view showing another example of a curling guide after a portion of the component has been removed. Figure 8A This is a side view showing yet another example of a curling guide. Figure 8B yes Figure 8A EE line section view, Figure 8C yes Figure 8A FF line section view. Figure 7 This indicates the state after the second wire guide 52 has been removed. Next, referring to the figures, another example of the curling guide 50d will be explained.

[0105] The curling guide 50d includes a first wire-binding guide 51d, which is relative to... Figure 7 The radial direction of the annular conveying path Ru, indicated by the middle arrow D1, restricts the position of the tie wire W on the radially outer periphery along the circumferential direction of the annular conveying path Ru, indicated by the arrow D2.

[0106] Curling guide 50d relative to Figure 8BThe first wire guide 51d is sandwiched between the second wire guide 52 and the third wire guide 53 along the axial direction of the annular conveying path Ru indicated by the middle arrow D3. Thus, the second wire guide 52 and the third wire guide 53, which are coiled guides 50d, face each other with a gap equal to the thickness of the first wire guide 51d. The gap Ra1 between the second wire guide 52 and the third wire guide 53 is more than twice the diameter R of the wire W.

[0107] The coiling guide 50d includes a suppressing portion 58 that suppresses the axial movement of one of the multiple binding wires W, in this example, one of the two binding wires W, along the annular transport path. The suppressing portion 58 includes a guide portion 58a in the width direction of the first binding wire guide 51d along the axial direction of the annular transport path Ru indicated by arrow D3. The guide portion 58a has a different height along the radial direction of the annular transport path indicated by arrow D1.

[0108] A guide portion 58a is provided on the first wire guide 51d. The guide portion 58a includes a longitudinal wall 58b facing the second wire guide 52. Because the guide portion 58a forms a longitudinal wall 58b, in the width direction of the first wire guide 51d along the axial direction of the annular transport path Ru (indicated by arrow D3), on the side near the second wire guide 52, it becomes concave in the radial direction outward along the annular transport path Ru (indicated by arrow D1), providing a step for one of the wires W1 to enter. The guide portion 58a is a step whose width along the axial direction of the annular transport path Ru (indicated by arrow D3) is slightly larger than the diameter R of the wire W, and whose depth along the radial direction of the annular transport path Ru (indicated by arrow D1) is approximately half the diameter R of the wire W. Thus, the longitudinal wall 58b faces the second wire guide 52 at a distance greater than the diameter of the wire W. Furthermore, the guide portion 58a is constructed with a concave curved surface, as shown along the annular conveying path Ru, in the circumferential direction indicated by arrow D2. For the guide portion 58a, in the circumferential direction of the annular conveying path Ru indicated by arrow D2, a longitudinal wall 58b is formed near the discharge portion 50e of the curled guide 50d.

[0109] The curling guide 50d has parallel guides 59 formed on the discharge section 50e.

[0110] The parallel guide 59 is formed by a surface along the axial direction of the first wire guide 51d along the axial direction of the annular conveying path Ru, as indicated by arrow D3.

[0111] In the guide section 58a, relative to the conveying direction of the wire W conveyed in the positive direction indicated by arrow F, the height of the longitudinal wall 58b gradually decreases towards the downstream side and is connected to the parallel guide section 59.

[0112] The effects of the 50d curling guide are explained, such as... Figure 8B As shown, one of the two binding wires W, conveyed in the positive direction by the binding wire conveying section 3 and passing through the coiling guide 50d, enters the guide section 58a via the side closest to the second binding wire guide 52. When one binding wire W1 enters the guide section 58a during the conveying of the binding wires W, movement towards the third binding wire guide 53, as indicated by arrow D31, is suppressed by the longitudinal wall 58b of the guide section 58a. Therefore, movement of one binding wire W1 towards the other binding wire W2 is suppressed, and the interchange of the positions of the two binding wires W between the second binding wire guide 52 and the third binding wire guide 53 is prevented.

[0113] In addition, when one of the tie wires W1 is about to move in the direction toward the second tie wire guide 52 as shown by arrow D32, its axial movement toward the annular conveying path Ru as shown by arrow D3 is restricted when it comes into contact with the second tie wire guide 52.

[0114] If the other wire W2 attempts to move in the direction indicated by arrow D32 toward the second wire guide 52, then the other wire W2 comes into contact with the first wire W1. The first wire W1 is thus restricted from axial movement along the annular transport path Ru indicated by arrow D3 by contacting the second wire guide 52. Therefore, further movement of the other wire W2 toward the second wire guide 52, as indicated by arrow D32, is inhibited by the first wire W1.

[0115] Therefore, the movement of the other wire W2 toward the wire W1 is suppressed, and the position swapping of the two wires W between the second wire guide 52 and the third wire guide 53 is suppressed.

[0116] Two wires W pass through the coiling guide 50d, thereby being induced to a state in which the axial position of the annular conveying path Ru is switched, which is suppressed by the suppression part 58.

[0117] Furthermore, as described above, one of the binding wires W1 contacts the longitudinal wall 58b of the guide portion 58a, thereby suppressing movement in the direction toward the third binding wire guide 53 as indicated by arrow D31, and suppressing movement toward the other binding wire W2. Additionally, one binding wire W can move in the direction toward the second binding wire guide 52 as indicated by arrow D32 until it contacts the second binding wire guide 52. The other binding wire W2, by contacting one of the binding wires W1, is suppressed from moving in the direction toward the second binding wire guide 52 as indicated by arrow D32. Therefore, the axial movement of one binding wire W1 and the other binding wire W2 in the annular transport path Ru as indicated by arrow D3 is suppressed. Consequently, within the coiling guide 50d, the amount of lateral movement of the binding wires W is reduced. Therefore, the positional interchange of the two wires W that have been given a curl by the curling guide 50d due to the action of conveying the wire W in the positive direction can be suppressed, the amount of the wires fed from the curling guide 50d shifting to the left and right directions is reduced, and the required width dimension of the induction guide 50b can be suppressed.

[0118] This application is based on Japanese Patent Application No. 2023-222766, filed on December 28, 2023, the contents of which are incorporated herein by reference.

[0119] Industrial utilization potential

[0120] According to this disclosure, a strapping machine is provided that can suppress the movement of any one of the multiple straps in a coiling guide toward other straps.

[0121] Explanation of reference numerals in the attached figures

[0122] 1A···Rebar Binding Machine, 10···Main Body, 2···Hopper, 20···Roller, 3···Wire Binding Conveyor, 30 (30L, 30R)···Conveyor Gear, 31···Conveyor Motor, 5···Curling Forming Section, 50a, 50c, 50c2, 50d···Curling Guide, 50b···Induction Guide, 51, 51c, 51d···First Wire Binding Guide, 52···First Second tying wire guide, 53... Third tying wire guide, 54, 56, 58... Suppression part, 54a, 56a, 58a... Guide part, 54b, 56b... Inclined surface, 58b... Longitudinal wall, 55, 57, 59... Parallel guide part, 6... Cutting part, 7... Binding part, 8... Drive part, 80... Torsion motor, 81... Reducer, W (W1, W2)... Tying wire.

Claims

1. A strapping machine, comprising: The wire conveying unit transports multiple wires. The coiling forming section forms a ring-shaped conveying path, which winds multiple binding wires conveyed by the binding wire conveying section around the bundled object; and The binding section twists the multiple binding wires wrapped around the bundle. The curling forming section includes: The curling guide imparts curl lines to the multiple wires conveyed by the wire conveyor; and The guiding element guides the multiple binding wires, which have been crimped by the curling guide, toward the binding section. The coiling guide includes a first wire-tying guide, a second wire-tying guide, and a third wire-tying guide. The first wire-tying guide radially restricts the position of the wire towards the radially outer periphery relative to the annular conveying path. The second wire-tying guide axially restricts the position of the wire towards one side of the axial direction relative to the annular conveying path. The third wire-tying guide restricts the position of the wire towards the other side of the axial direction. The coiling guide enables multiple binding wires to be arranged in contact with each other along the axial direction of the annular transport path between the second binding wire guide and the third binding wire guide, and has a suppressing part that suppresses one of the multiple binding wires from moving toward the other binding wires.

2. The strapping machine according to claim 1, wherein, The suppression section has a guide portion in the width direction of the first wire guide along the axial direction of the annular conveying path, and the guide portion has a different height along the radial direction of the annular conveying path.

3. The strapping machine according to claim 1, wherein, The curling guide inhibits other wires from moving toward the first wire by means of the first wire whose movement is inhibited by the inhibiting part.

4. The strapping machine according to claim 2, wherein, The guide portion includes a slope in the width direction of the first wire guide along the axial direction of the annular conveying path, the slope being inclined outward along the radial direction of the annular conveying path.

5. The strapping machine according to claim 4, wherein, The guide portion has, in the width direction of the first wire guide along the axial direction of the annular conveying path, a slope that is inclined outward in the radial direction along the annular conveying path on both sides of the side near the second wire guide, the side near the third wire guide, or both the side near the second wire guide and the side near the third wire guide.

6. The strapping machine according to claim 2, wherein, The guide portion includes a step in the width direction of the first wire guide along the axial direction of the annular conveying path and in the radial direction of the annular conveying path.

7. The strapping machine according to claim 6, wherein, The guide portion includes a longitudinal wall opposite to the second wire guide.

8. The strapping machine according to claim 2, wherein, The suppression portion is formed on the first wire guide along the circumference of the annular transport path.

9. The strapping machine according to claim 8, wherein, The inhibition part is located on the upstream side of the coiling guide, relative to the conveying direction of the wire conveying section in the positive direction.

10. The strapping machine according to claim 9, wherein, The suppression part is disposed in the circumferential direction of the annular conveying path over at least 1 / 4 of the annular conveying path.

11. The strapping machine according to claim 9, wherein, Relative to the conveying direction of the wire conveying section in the positive direction, the coiling guide has a parallel guide on the downstream side of the suppression section, which is formed by a surface along the axial direction of the annular conveying path.

12. The strapping machine according to claim 11, wherein, The height of the inhibition section along the radial direction of the annular transport path gradually changes as it moves toward the parallel guide section.

13. A strapping machine, comprising: The wire conveying unit transports multiple wires. The coiling forming section forms a ring-shaped conveying path, which winds multiple binding wires conveyed by the binding wire conveying section around the bundled object; and The binding section twists the multiple binding wires wrapped around the bundle. The curling forming section includes: The curling guide imparts curl lines to the multiple wires conveyed by the wire conveyor; and The guiding element guides the multiple binding wires, which have been crimped by the curling guide, toward the binding section. The coiling guide includes a first wire-tying guide, a second wire-tying guide, and a third wire-tying guide. The first wire-tying guide radially restricts the position of the wire towards the radially outer periphery relative to the annular conveying path. The second wire-tying guide axially restricts the position of the wire towards one side of the axial direction relative to the annular conveying path. The third wire-tying guide restricts the position of the wire towards the other side of the axial direction. The coiling guide enables multiple binding wires to be arranged in contact with each other along the axial direction of the annular conveying path between the second binding wire guide and the third binding wire guide, and has an inducing part that guides one of the multiple binding wires toward the second binding wire guide or the third binding wire guide.

14. A strapping machine, comprising: The wire conveying unit transports multiple wires. The coiling forming section forms a ring-shaped conveying path, which winds multiple binding wires conveyed by the binding wire conveying section around the bundled object; and The binding section twists the multiple binding wires wrapped around the bundle. The curling forming section includes: The curling guide imparts curl lines to the multiple wires conveyed by the wire conveyor; and The guiding element guides the multiple binding wires, which have been crimped by the curling guide, toward the binding section. The coiling guide includes a first wire-tying guide, a second wire-tying guide, and a third wire-tying guide. The first wire-tying guide radially restricts the position of the wire towards the radially outer periphery relative to the annular conveying path. The second wire-tying guide axially restricts the position of the wire towards one side of the axial direction relative to the annular conveying path. The third wire-tying guide restricts the position of the wire towards the other side of the axial direction. The coiling guide enables multiple binding wires to be arranged in contact with each other along the axial direction of the annular transport path between the second binding wire guide and the third binding wire guide, and includes a suppression portion that includes a step radially along the annular transport path in the width direction of the first binding wire guide along the axial direction of the annular transport path.

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