Bundling machine

Abstract

A bundling machine capable of inhibiting a bundled bundling wire from being easily detached. A cutting portion (8A1) that cuts a bundling wire (W) includes a fixed blade (80A) that forms a first bundling wire passage (83) through which the bundling wire passes, and a movable blade (81A1) that forms a second bundling wire passage (86A1) through which the bundling wire passes, and that slides on an outer peripheral surface of the fixed blade to cut the bundling wire. The movable blade includes a blade portion (87A) that is provided on one side of the second bundling wire passage and that slides along the outer peripheral surface of the fixed blade, and a passage forming member (95A1) that is provided on the other side of the second bundling wire passage. The second bundling wire passage includes a guide portion (93A1) that guides the cut bundling wire by movement of the movable blade to a standby position, the guide portion protruding toward a guide portion (40A) that causes the bundling wire to curl, and that blocks between the movable blade and the guide portion in a manner that the bundling wire cannot pass through when the movable blade moves to the standby position.

Description

[0001] This application is a divisional application of application No. 201910589659.8, filed on June 28, 2019, with the title of "Binding Machine". TECHNICAL FIELD

[0002] The present disclosure relates to a binding machine that binds a binding object such as a reinforcing bar using a binding wire. BACKGROUND

[0003] In the past, a binding machine called a reinforcing bar binding machine that winds a binding wire around a reinforcing bar and binds a plurality of reinforcing bars by twisting the binding wire has been proposed.

[0004] In the past, in such a reinforcing bar binding machine, the binding wire wound on a binding wire reel is fed toward the front end side of the binding machine main body by a feeding mechanism, and the fed binding wire is crimped by a crimping guide provided on the front end side of the binding machine main body. At this time, the binding wire is crimped in a manner of surrounding the reinforcing bar. The binding wire crimped along the periphery of the reinforcing bar is cut by a cutter, and then twisted by a twisting mechanism.

[0005] The cutter includes a fixed blade having a binding wire through hole through which the binding wire can pass, a movable blade that slides on the outer peripheral surface of the fixed blade, and a link member that drives the movable blade. In order to cut the binding wire, it is only necessary to slide the movable blade by the link member in a state where the binding wire has passed through the binding wire through hole. The movable blade is formed with an engaging portion that engages near the end portion of the cut binding wire and can hold the end portion in a bent manner. The engaging portion is formed in an acute angle in order to be able to hold the binding wire in a bent manner. By holding the end portion of the binding wire, it is possible to prevent the end portion from being caught and clogging between the crimping guide and the cutter, or between the movable blade and the link member, and the like (for example, refer to Patent Document 1).

[0006] PRIOR ART DOCUMENT

[0007] PATENT DOCUMENT

[0008] PATENT DOCUMENT 1 Japanese Patent No. 5309947

[0009] By forming the engaging portion of the engaging portion of the engaging portion in an acute angle, it is possible to hold the end portion of the binding wire, but the engaging portion gradually wears due to repeated use, and it can not be possible to firmly hold the end portion. As a result, it is conceivable that the end portion is caught and clogs between the crimping guide and the cutter, between the movable blade and the link member, and the like. SUMMARY

[0010] The present disclosure is made to solve such a problem, and aims to provide a strapping machine capable of inhibiting the situation where the end portion of the cut strapping wire is caught and clogged between the crimping guide and the cutter, between the movable blade and the link member, and the like.

[0011] To solve the above problem, the present application provides a strapping machine, comprising: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, and cuts the strapping wire; and a guide section that includes: a first abutting section that is provided between the strapping wire conveying section and the cutting section, and is provided on a first side of a conveying path of the strapping wire, and is capable of abutting the strapping wire from the first side; and a second abutting section that is provided on a downstream side of the cutting section, and is provided on a second side opposite to the first side with respect to the conveying path of the strapping wire, and is capable of abutting the strapping wire from the second side, and the guide section restricts a traveling direction of the strapping wire by abutting the strapping wire in a state of being abutted by the first abutting section through the second abutting section, to crimp the strapping wire, and the cutting section includes: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; and a movable blade that forms a second strapping wire passage through which the strapping wire passes, and cuts the strapping wire by sliding on an outer peripheral surface of the fixed blade, and the movable blade is movable between a standby position at which the first strapping wire passage and the second strapping wire passage are communicated, and a movement end position at which the first strapping wire passage and the second strapping wire passage are not communicated, by sliding on the outer peripheral surface of the fixed blade, and the second strapping wire passage includes a guide section that guides the cut strapping wire by an action of the movable blade moving from the movement end position to the standby position, and the guide section is configured to be located on the second side, and to protrude toward the guide section when the movable blade moves to the standby position, to clog between the movable blade and the guide section in a manner that the strapping wire cannot pass through.

[0012] In the present application, when the movable blade moves to the standby position, the cut strapping wire is guided by the guide section, and the movable blade and the guide section are clogged in a manner that the strapping wire cannot pass through.

[0013] Further, the present application provides a strapping machine including: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section and cuts the strapping wire; and a guide section that includes: a first abutting section that is provided between the strapping wire conveying section and the cutting section and on a first side of a conveying path of the strapping wire, is capable of abutting against the strapping wire from the first side, and is capable of guiding the strapping wire by abutting against the strapping wire from the first side; and a second abutting section that is provided on a second side of the cutting section that is opposite to the first side with respect to the conveying path of the strapping wire, is capable of abutting against the strapping wire from the second side, and is capable of guiding the strapping wire by abutting against the strapping wire from the second side, and the guide section restricts a traveling direction of the strapping wire to curl the strapping wire by the second abutting section abutting against the strapping wire in a state of abutting against the first abutting section, and the cutting section includes: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; and a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade to cut the strapping wire, is capable of moving between a standby position at which the first strapping wire passage and the second strapping wire passage are communicated and a movement end position at which the first strapping wire passage and the second strapping wire passage are not communicated by sliding on the outer peripheral surface of the fixed blade, and the second strapping wire passage includes a guide section that guides the cut strapping wire by an action of the movable blade moving from the movement end position to the standby position, and an opening on a side opposite to the guide section is widened toward the second side in a direction of movement of the movable blade with respect to an opening on a side opposite to the fixed blade in the second strapping wire passage.

[0014] In the present application, the cut strapping wire is guided by the guide section when the movable blade moves to the standby position.

[0015] Further, the present application provides a strapping machine including: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section and cuts the strapping wire; and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, restricts a traveling direction of the strapping wire to curl the strapping wire, and the cutting section includes: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade to cut the strapping wire; and a driving member that is coupled to the movable blade, drives the movable blade, and the movable blade is capable of moving between a standby position at which the first strapping wire passage and the second strapping wire passage are communicated and a movement end position at which the first strapping wire passage and the second strapping wire passage are not communicated by sliding on the outer peripheral surface of the fixed blade, and an opening of a diameter of the strapping wire or more is formed between the movable blade and the driving member when the movable blade moves to the standby position in the cutting section.

[0016] In the present application, the strapping wire easily escapes from between the movable blade and the driving member even in a case where the movable blade moves to the standby position and a rear end of the strapping wire is pinched between the movable blade and the driving member.

[0017] Further, the present application relates to a strapping machine, comprising: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, cuts the strapping wire, and has a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade to cut the strapping wire; and a driving member that is coupled to the movable blade and drives the movable blade; and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, crimps the strapping wire by restricting a traveling direction of the strapping wire, and has a protrusion that protrudes toward the guide section, wherein the cutting section is configured to restrict a change in movement of the strapping wire between the protrusion and the guide section when the movable blade moves to a movement end position.

[0018] In the present application, the strapping wire is prevented from being caught between the movable blade and the driving member when the movable blade moves to the standby position.

[0019] Further, the present application relates to a strapping machine, comprising: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, cuts the strapping wire, and has a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade to cut the strapping wire; and a driving member that is coupled to the movable blade and drives the movable blade; and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, crimps the strapping wire by restricting a traveling direction of the strapping wire, and has a protrusion that protrudes toward the guide section, wherein the cutting section is configured to restrict a change in movement of the strapping wire between the protrusion and the guide section when the movable blade moves to a movement end position.

[0020] In the present application, the protrusion is opposed to the guide section when the movable blade is in the movement end position, and thus the distance between the movable blade and the guide section is narrower than in a structure in which the protrusion is not provided. Thus, when a force that pulls the strapping wire is applied due to a movement of twisting the strapping wire wound around a reinforcing bar, a large change in movement of the strapping wire can be suppressed.

[0021] Further, the present application relates to a strapping machine including: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, cuts the strapping wire, and includes: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade, and cuts the strapping wire; and a drive member that is coupled to the movable blade and drives the movable blade; and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, crimps the strapping wire by restricting a traveling direction of the strapping wire, and includes a strapping wire retreat section that is provided at an end portion opposite to the movable blade, and is formed by a surface that retreats in a direction in which a gap between the movable blade and the guide section becomes larger.

[0022] In the present application, in a state in which the movable blade moves to the standby position, the gap between the guide section and the movable blade becomes wider, and thus it is possible to suppress a case in which the strapping wire is bent by being pinched between the guide section and the movable blade.

[0023] Further, the present application relates to a strapping machine including: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, cuts the strapping wire, and includes: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade, and cuts the strapping wire; and a drive member that is coupled to the movable blade and drives the movable blade; and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, crimps the strapping wire by restricting a traveling direction of the strapping wire, and includes a strapping wire retreat section that is provided at an end portion opposite to the movable blade, and is formed by a surface that retreats in a direction in which a gap between the movable blade and the guide section becomes larger.

[0024] In the present application, by providing the movable range suppression section, the gap between the guide section and the movable blade becomes narrower. Thus, even if a force that pulls the strapping wire is applied due to an action of twisting the strapping wire wound around the reinforcing bar, it is possible to suppress a case in which the strapping wire is pinched when the movable blade rotates to the standby position, by the reduction in the movable range of the strapping wire.

[0025] Further, the present application relates to a strapping machine including: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, cuts the strapping wire, and includes: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade, and cuts the strapping wire; a driving member that is coupled to the movable blade, and drives the movable blade; a driving section that drives the driving member; and a control section that controls the driving section; and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, crimps the strapping wire by restricting a traveling direction of the strapping wire, and includes: a fixed guide that forms a first guide passage through which the strapping wire passes; a movable guide that forms a second guide passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed guide, and cuts the strapping wire; a driving member that is coupled to the movable guide, and drives the movable guide; a driving section that drives the driving member; and a control section that controls the driving section, wherein the movable guide is movable between a standby position at which the first guide passage and the second guide passage are communicated, and a movement end position at which the first guide passage and the second guide passage are not communicated, the control section controls the driving section so that the movable guide moves to the standby position after the movable guide moves from the movement end position to a direction in which the strapping wire is cut, and then moves to the standby position.

[0026] In the present application, even if the trailing end portion of the strapping wire is caught between the driving member and the movable blade, the strapping wire caught between the driving member and the movable blade is released by moving the movable blade and the driving member in a direction away from the end portion of the strapping wire by moving the movable blade in the direction in which the strapping wire is cut by a predetermined amount.

[0027] Effects of the Invention

[0028] In the present application, even if the trailing end portion of the strapping wire cannot be held by the movable blade, the trailing end portion of the strapping wire being caught between the driving member and the guide section is suppressed. Further, the trailing end portion of the strapping wire being caught between the driving member and the movable blade is suppressed. Thus, the strapping wire after being strapped is prevented from being released from the strapping machine, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a diagram showing an overall configuration of a steel bar strapping machine according to the present embodiment, as viewed from one side.

[0030] Figure 2 is a diagram showing an overall configuration of a steel bar strapping machine according to the present embodiment, as viewed from the other side.

[0031] Figure 3 is a diagram showing an example of a conventional cutting section.

[0032] Figure 4A is a diagram showing an example of a conventional cutting section.

[0033] Figure 4B is a diagram showing an example of a conventional cutting section.

[0034] Figure 4C FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0035] Figure 4D FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0036] Figure 4E FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0037] Figure 4F FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0038] Figure 5A FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0039] Figure 5B FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0040] Figure 5C FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0041] Figure 5D FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0042] Figure 6A FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0043] Figure 6B FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0044] Figure 6C FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0045] Figure 6D FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0046] Figure 7A FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0047] Figure 7B FIG. 1 is a view showing the function and problem of the conventional cutting section.

[0048] Figure 7CFig. 6 is a view showing a third embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0049] Figure 7D Fig. 7 is a view showing a fourth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0050] Figure 8A Fig. 8 is a view showing a fifth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0051] Figure 8B Fig. 9 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0052] Figure 8C Fig. 10 is a view showing a seventh embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0053] Figure 8D Fig. 11 is a view showing an eighth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0054] Figure 9A Fig. 12 is a view showing a ninth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0055] Figure 9B Fig. 13 is a view showing a tenth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0056] Figure 9C Fig. 14 is a view showing an eleventh embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0057] Figure 9D Fig. 15 is a view showing a twelfth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0058] Figure 10A Fig. 16 is a view showing a thirteenth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0059] Figure 10B Fig. 17 is a view showing a fourteenth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0060] Figure 10C Fig. 18 is a view showing a fifteenth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0061] Figure 10DFig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0062] Figure 10E Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0063] Figure 11A Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0064] Figure 11B Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0065] Figure 11C Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0066] Figure 12A Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0067] Figure 12B Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0068] Figure 12C Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0069] Figure 12D Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0070] Figure 12E Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0071] Figure 13A Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0072] Figure 13B Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0073] Figure 13C Fig. 6 is a view showing a sixth embodiment of the cutting section of the reinforcing bar tying machine according to the first embodiment of the present embodiment.

[0074] Figure 13Dis a view showing a second example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0075] Figure 13E is a view showing a second example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0076] Figure 14A is a view showing a third example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0077] Figure 14B is a view showing a third example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0078] Figure 14C is a view showing a third example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0079] Figure 14D is a view showing a third example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0080] Figure 14E is a view showing a third example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0081] Figure 15A is a view showing a fourth example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0082] Figure 15B is a view showing a fourth example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0083] Figure 15C is a view showing a fourth example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0084] Figure 15D is a view showing a fourth example of the crimping forming portion of the first embodiment of the reinforcing bar tying machine according to the present embodiment.

[0085] Figure 16A is a view showing another embodiment of the reinforcing bar tying machine according to the present embodiment.

[0086] Figure 16B is a view showing another embodiment of the reinforcing bar tying machine according to the present embodiment.

[0087] Figure 16C is a view showing another embodiment of the reinforcing bar tying machine according to the present embodiment.

[0088] Figure 16D is a diagram showing another embodiment of the steel bar tying machine of the present embodiment.

[0089] Figure 17 is a block diagram showing another embodiment of the steel bar tying machine of the present embodiment.

[0090] Figure 18 is a flowchart showing another embodiment of the steel bar tying machine of the present embodiment.

[0091] Explanation of Reference Numerals

[0092] 1A steel bar tying machine, 10 main body, 10a handle portion, 11 guide frame, 2A reel housing portion, 20 tying wire reel, 3A tying wire conveying portion, 4A crimping forming portion, 40 guide portion, 41 tying wire guide, 42 tying wire guide (first abutting portion), 43 tying wire guide (second abutting portion), 44 tying wire sliding surface, 45a, 45b end portion, 5A tying portion, 51 twisting motor, 52 gear, 53 screw shaft portion, 54 advance and retreat cylinder portion, 55 twisting hook, 6A braking portion, 7 guide path, 7b end portion, 8A1 to 8A7 cutting portion, 80, 80A fixed knife, 81, 81A, 81A1 to 81A7 movable knife, 82A, 82A6 drive member, 83A first tying wire passage, 84A knife portion, 85A shaft hole portion, 86A1 to 86A7 second tying wire passage, 87A knife portion, 88A connecting portion, 89A link, 93A1, 93A2, 93A3 guide portion, 95A1, 95A2, 95A3, 95A4, 95A5, 95A6, 95A7 passage forming member, 96A4 discharge guide portion, 96A5, 96A6, 97A6 suppression portion, 96A7 operation change suppression portion, 98A1, 98A2 tying wire retreat portion, 98A3, 98A4 movable range suppression portion, W tying wire DETAILED DESCRIPTION

[0093] Hereinafter, with reference to the drawings, an example of a steel bar tying machine as an embodiment of the tying machine of the present application will be described.

[0094] <Configuration Example of Steel Bar Tying Machine of Present Embodiment>

[0095] Figure 1 is a diagram showing another embodiment of the steel bar tying machine of the present embodiment. Figure 2 is a diagram showing another embodiment of the steel bar tying machine of the present embodiment.

[0096] The steel wire tying machine 1A is provided with a wire spool 20 that is wound with one or more tying wires, a wire spool housing portion 2A that houses the wire spool 20 so as to be rotatable, and a wire conveying portion 3A that conveys the tying wire W wound on the wire spool 20 housed in the wire spool housing portion 2A. Further, the steel wire tying machine 1A is provided with a crimping formation portion 4A that crimps the tying wire W conveyed by the wire conveying portion 3A so as to be wound around the steel wire S. In addition, the steel wire tying machine 1A is provided with a tying portion 5A that twists the tying wire W wound around the steel wire S, and a brake portion 6A that brakes the rotating wire spool 20 so as to restrict the rotation of the wire spool 20. Further, the steel wire tying machine 1A is provided with a guide path 7 that guides the tying wire W, and a cutting portion 8A that cuts the tying wire W.

[0097] The steel wire tying machine 1A is provided with a handle portion 10a that protrudes with respect to the main body portion 10. Further, the steel wire tying machine 1A is provided with the crimping formation portion 4A on one side and the wire spool housing portion 2A on the other side with the handle portion 10a interposed therebetween. In the following description, the side on which the handle portion 10a is provided with respect to the main body portion 10 of the steel wire tying machine 1A is defined as the lower side, and the opposite side of the handle portion 10a is defined as the upper side. Further, the side on which the crimping formation portion 4A is provided is defined as the front side, and the side on which the wire spool housing portion 2A is provided is defined as the rear side.

[0098] The wire spool housing portion 2A is configured to allow the wire spool 20 to be attached and detached and to be supported. The wire conveying portion 3A is provided with a pair of conveying gears 30 as conveying members. The pair of conveying gears 30 is disposed with the conveying path of the tying wire W interposed therebetween. The wire conveying portion 3A is provided with a conveying motor 31 that drives the conveying gears 30, and a gear 32 that transmits the rotation of the conveying motor 31 to the conveying gears 30. The wire conveying portion 3A conveys the tying wire W toward the crimping formation portion 4A by rotating the conveying gears 30 with the tying wire W interposed between the pair of conveying gears 30.

[0099] The crimping formation portion 4A is provided with a guide portion 40 that abuts against the tying wire W conveyed by the wire conveying portion 3A so as to restrict the advancing direction of the tying wire W. The crimping formation portion 4A guides the tying wire W so as to form a crimp mark (crimp the tying wire W) in the tying wire W by roughly tracing a circle around the steel wire S.

[0100] The curl forming portion 4A has a binding wire guide 42 provided between the transmission gear 30 of the binding wire transmission portion 3A and the cutting portion 8A and provided on a first side of the transmission path of the binding wire W indicated by a two-dot chain line and capable of abutting against the binding wire A from the first side. The binding wire guide 42 is an example of a first abutting portion. Further, the curl forming portion 4A has a binding wire guide 43 provided on a downstream side of the cutting portion 8A and provided on a second side opposite to the first side with respect to the transmission path of the binding wire W and capable of abutting against the binding wire W from the second side. The binding wire guide 43 is an example of a second abutting portion. The binding wire guide 43 is provided at an end portion 45a on a downstream side of a binding wire sliding surface 44 of the guide portion 40 where the binding wire W abuts, in the transmission direction of the binding wire W, and protrudes from the binding wire sliding surface 44. Further, the curl forming portion 4A has a binding wire guide 41 provided on an upstream side of the binding wire guide 42 and provided on the second side with respect to the transmission path of the binding wire W and capable of abutting against the binding wire W from the second side. Note that the first side is an inner side in the radial direction of the curled binding wire W, and the second side is an outer side in the radial direction of the curled binding wire W.

[0101] In order to form a curl mark in the binding wire W, it is sufficient to have at least the binding wire guide 42 and the binding wire guide 43, but in order to more reliably form a curl mark, it is preferable to have the binding wire guide 41, the binding wire guide 42, and the binding wire guide 43. Note that the binding wire sliding surface 44 is a structure that is not essential although it contributes to the formation of a curl mark.

[0102] The binding portion 5A has a twisting motor 51, a gear 52, a screw shaft portion 53, a feed and retreat cylinder portion 54, and a twisting hook 55. As a drive source of the binding portion 5A, the twisting motor 51 driven separately from the transmission motor 31 can be used.

[0103] The screw shaft portion 53 is rotatably supported to the main body portion 10 and rotates by a driving force of the twisting motor 51 transmitted through the gear 52. The screw shaft portion 53 is formed with a screw thread on an outer peripheral surface, and the feed and retreat cylinder portion 54 is formed with a screw thread on an inner peripheral surface so that the screw thread of the outer peripheral surface of the screw shaft portion 53 and the screw thread of the inner peripheral surface of the feed and retreat cylinder portion 54 are screwed.

[0104] The binding portion 5A moves the feed and retreat cylinder portion 54 forward and backward by rotating the screw shaft portion 53 by the rotation of the twisting motor 51 in a state where the rotation of the feed and retreat cylinder portion 54 is restricted. Further, the screw shaft portion 53 and the feed and retreat cylinder portion 54 are combined in a manner that they rotate as one, and thus the feed and retreat cylinder portion 54 rotates by the rotation of the screw shaft portion 53 generated by the rotation of the twisting motor 51.

[0105] The twisting hook 55 is a pair of hook-shaped members attached to the front end of the advancing / retracting cylinder 54. The twisting hook 55 is opened and closed in correspondence with the advancing / retracting movement of the advancing / retracting cylinder 54 by a known structure.

[0106] The brake portion 6A is provided with a spool brake 60 that can engage with the binding wire spool 20, and a solenoid 61 that drives the spool brake 60. The spool brake 60 is provided with an engaging portion 62 that engages with the engaged portion 20a of the binding wire spool 20 at one end portion. Further, the spool brake 60 has the other end portion on the opposite side to the side on which the engaging portion 62 is provided attached to a shaft 63, and is rotatably supported to the main body portion 10 by the shaft 63.

[0107] The solenoid 61 is linked to a link 64 attached to the shaft 63 by an electromagnet and a spring, etc. that are not shown. The brake portion 6A moves between a brake position in which the engaging portion 62 of the spool brake 60 engages with the engaged portion 20a of the binding wire spool 20, and a retreat position in which the engaging portion 62 of the spool brake 60 is distanced from the binding wire spool 20, by a rotational movement about the shaft 63.

[0108] The binding wire spool 20 rotates in response to the conveyance of the binding wire W by the binding wire conveyance portion 3A. Therefore, even after the conveyance of the binding wire W by the binding wire conveyance portion 3A has stopped, the binding wire spool 20 continues to rotate due to inertia.

[0109] Therefore, in the brake portion 6A, in conjunction with the case in which the conveyance of the binding wire W by the binding wire conveyance portion 3A has stopped, the solenoid 61 operates, and the engaging portion 62 of the spool brake 60 moves from the retreat position to the brake position.

[0110] Thus, in conjunction with the case in which the conveyance of the binding wire W by the binding wire conveyance portion 3A has stopped, the engaging portion 62 of the spool brake 60 engages with the engaged portion 20a of the binding wire spool 20, and the rotation of the binding wire spool 20 is stopped. Therefore, the case in which the binding wire spool 20 rotates due to inertia after the conveyance of the binding wire W by the binding wire conveyance portion 3A has stopped is restricted.

[0111] The guide path 7 is provided on the upstream side of the cutting portion 8A with respect to the conveyance direction of the binding wire W, and constitutes a path that guides the binding wire W conveyed by the binding wire conveyance portion 3A to the cutting portion 8A.

[0112] The cutting portion 8A is provided with a fixed blade 80A fixed to the guide frame 11, a movable blade 81A provided so as to be rotatable with respect to the fixed blade 80A, and a driving member 82A that rotates the movable blade 81A. Note that details of the cutting portion 8A of the present embodiment are described later.

[0113] <Example of the operation of the reinforcing bar binding machine of the present embodiment>

[0114] Next, referring to the drawings, the operation of bundling the reinforcing bars S with the binding wire W in the reinforcing bar bundling machine 1A of the present embodiment will be described.

[0115] When the trigger 10t of the reinforcing bar bundling machine 1A is operated, the binding wire W is conveyed by the binding wire conveying section 3A by driving the conveying motor 31 by a predetermined amount to be wound around the reinforcing bar S by the crimping formation section 4A. The number of times of winding the binding wire W around the reinforcing bar S is set by the amount of conveyance of the binding wire W. The binding wire reel 20 rotates by being driven by the conveyance of the binding wire W by the binding wire conveying section 3A. After the operation of conveying the binding wire W in the binding wire conveying section 3A is completed by stopping the conveying motor 31, the binding wire reel 20 that rotates by being driven by the conveyance of the binding wire W is stopped by the braking section 6A, and the rotation of the binding wire reel 20 is restricted.

[0116] In the binding section 5A, the twisting motor 51 is rotated forward, and the rotation of the twisting motor 51 is transmitted to the screw section 53 via the gear 52. At this time, the screw section 53 rotates, but the advance-retracting cylinder section 54 is restricted from rotating, and thus the advance-retracting cylinder section 54 is conveyed forward by the action of the screw threads. The cutting section 8A is operated to cut the binding wire W by conveying the advance-retracting cylinder section 54 forward. Also, the twisting hook 55 advances to a position where it comes into contact with the binding wire W. The twisting hook 55 is operated in the closing direction in conjunction with the advance of the advance-retracting cylinder section 54, and holds a portion of the binding wire W that is wound in a loop shape.

[0117] The advance-retracting cylinder section 54 is released from the restriction of rotation at a predetermined position of the advance, and rotates together with the screw section 53. The binding wire W is twisted by the rotation of the twisting hook 55 that holds the binding wire W.

[0118] When the twisting operation is completed, the twisting motor 51 is reversed, and the screw section 53 rotates in the reverse direction. Thus, the advance-retracting cylinder section 54 and the twisting hook 55 also move in the rearward direction, and the twisting hook 55 opens to separate the binding wire W. The twisting motor 51 is reversed until the advance-retracting cylinder section 54 and the twisting hook 55 move to the standby position. When the advance-retracting cylinder section 54 and the twisting hook 55 move to the standby position, the twisting motor 51 is stopped, and the series of operations is completed. Thus, the reinforcing bar S is bundled with the binding wire W.

[0119] <Problem of the Reinforcing Bar Bundling Machine of the Present Embodiment>

[0120] Next, the structure of the conventional cutting section 8 that cuts the binding wire W will be described. Figure 3 is a view showing an example of the conventional cutting section. The cutting section 8 is provided with a fixed blade 80 that is fixed to the guide frame 11, a movable blade 81 that is provided so as to be rotatable with respect to the fixed blade 80, and a driving member 82 that rotates the movable blade 81.

[0121] The stationary blade 80 is provided in the conveying path of the tying wire W passing through the guide path 7. The stationary blade 80 is formed of a cylindrical member and is erected from the guide frame 11 so that the axial direction of the cylindrical shape is perpendicular to the conveying direction of the tying wire W. Furthermore, a first tying wire passage 83 for passing the tying wire W is formed through the stationary blade 80 in the radial direction of the cylindrical shape.

[0122] The first tying wire passage 83 extends along the conveying path of the tying wire W, and its upstream end in the conveying direction of the tying wire W opens toward the end 7b of the guide path 7. Furthermore, its downstream end in the conveying direction of the tying wire W opens toward the guide portion 40, and a blade portion 84 is formed at the edge of the opening at the downstream end in the conveying direction of the tying wire W. Furthermore, the diameter of the first tying wire passage 83 is larger than the diameter of the tying wire W.

[0123] The movable blade 81 includes a shaft hole 85 into which the stationary blade 80 is inserted, a second binding wire passage 86 through which the binding wire W passes, a blade portion 87 that slides along the outer peripheral surface of the stationary blade 80 , and a coupling portion 88 to which the driving member 82 is coupled.

[0124] The shaft hole 85 is formed of an opening having an inner diameter substantially equal to or slightly larger than the outer diameter of the stationary blade 80. The movable blade 81 is supported rotatably about the stationary blade 80 when the stationary blade 80 is inserted into the shaft hole 85.

[0125] The second tying wire passage 86 is formed by an opening such as a groove or a hole through which the tying wire W passes. Figure 3 In the standby position shown, the second tying wire passage 86 is connected to the first tying wire passage 83 of the stationary knife 80, and allows the tying wire W to pass before being cut. Furthermore, the second tying wire passage 86 guides the cut tying wire W to a path where it can be separated from the cutting unit 8 by the movement of the movable knife 81 after the tying wire W is cut.

[0126] The knife portion 87 is provided in the second binding wire passage 86 along the inner peripheral surface of the shaft hole portion 85, and slides along the outer peripheral surface of the fixed knife 80 when the movable knife 81 rotates with the fixed knife 80 as a fulcrum. Figure 3 When the movable knife 81 starts rotating in the cutting direction indicated by arrow F from the standby position shown in FIG. 1 , the blade portion 87 moves toward the blade portion 84 of the stationary knife 80. As a result, the tying wire W passing through the first tying wire passage 83 of the stationary knife 80 is sandwiched between the blade portion 84 of the stationary knife 80 and the blade portion 87 of the movable knife 81, thereby being cut. Furthermore, when the movable knife 81 rotates in the retracting direction indicated by arrow R, the blade portion 87 moves away from the blade portion 84 of the stationary knife 80, and the second tying wire passage 86 of the movable knife 81 is connected to the first tying wire passage 83 of the stationary knife 80.

[0127] The link portion 88 is formed at the opposite side of the shaft hole portion 85, and links the driving member 82 to be rotatable.

[0128] The driving member 82 is linked to the advance and retreat cylinder portion 54 driven by the Figure 2 twist motor 51 shown in FIG. 1 via a link 89, and moves along the extension direction of the screw shaft portion 53 in conjunction with linear motion and rotational motion.

[0129] Thus, the action of the advance and retreat cylinder portion 54 reciprocating along the screw shaft portion 53 is transmitted to the movable blade 81 via the link 89 and the driving member 82, and the movable blade 81 rotates toward the cutting direction indicated by the arrow F and the retreat direction indicated by the arrow R with the fixed blade 80 as a fulcrum.

[0130] Next, the action and problem of the conventional cutting portion will be described. Figures 4A-4F is a view showing the action and problem of the conventional cutting portion. As shown in Figure 4A , the second bundled wire passage 86 of the movable blade 81 is formed with an engagement portion 90 capable of holding the rear end portion WE of the bundled wire W cut by the cutting portion 8. That is, the engagement portion 90 includes a first engagement surface 91 capable of engaging with the lower surface of the bundled wire W passing through the first bundled wire passage 83 at the time of cutting, and a second engagement surface 92 formed at a sharp angle from the front end portion of the first engagement surface 91 and capable of engaging with the lower surface of the bundled wire W after the bundled wire W is cut.

[0131] According to the above structure, after the bundled wire W is wound around the steel bar by being formed into a coil by the crimping formation portion 4A, the cutting portion 8 operates, and at the time of rotation of the movable blade 81, the bundled wire W is cut, and the first engagement surface 91 of the engagement portion 90 engages with the vicinity of the rear end portion WE of the bundled wire W to press it up. A part of the bundled wire W touches the bundled wire sliding surface 44 of the guide portion 40 but cannot be pressed up further, and thus the vicinity of the rear end portion WE of the bundled wire W is bent at the front end portion of the first engagement surface 91.

[0132] Thus, as shown in Figure 4B , even if a force to pull the bundled wire W is applied due to the action of the twisting of the bundled wire W wound around the steel bar S by the bundling portion 5A, the rear end portion WE of the bundled wire W is caught at the front end of the first engagement surface 91 and is held in the state of engaging with the second engagement surface 92.

[0133] Thus, when the action of the twisting of the bundled wire W by the bundling portion 5A ends, as shown in Figure 4C , in conjunction with the action of the restoration of the bundling portion 5A, the movable blade 81 rotates toward the retreat direction indicated by the arrow R, the rear end portion WE of the bundled wire W is pressed back by the second bundled wire passage 86 of the movable blade 81, and it is possible to guide the cut bundled wire W to a path from which the bundled wire W can be separated from the cutting portion 8.

[0134] However, when the front end portion of the first engaging surface 91 is worn, the first engaging surface 91 cannot hold the binding wire W. Therefore, if the binding wire W wound around the reinforcing bar S is twisted by the binding portion 5A and a force is applied to pull the binding wire W, the binding wire W may be pulled. Figure 4D As shown, the tying wire W may move from the position shown by the two-dot chain line to the position shown in the embodiment.

[0135] If the rear end portion WE of the tying wire W cannot be held by the movable knife 81, the movable knife 81 rotates in the retreat direction indicated by the arrow R, as shown in FIG. Figure 4E As shown, the rear end portion WE of the tying wire W may be clamped between the driving member 82 and the guide portion 40. Figure 4F As shown, the rear end portion WE of the binding wire W may be clamped between the driving member 82 and the movable knife 81. If such a state is reached, it is difficult for the binding wire W to be separated after binding, and the working efficiency is reduced.

[0136] Therefore, in the reinforcing bar binding machine 1A of the present embodiment, the structure of the cutting portion 8A, the structure of the curl forming portion 4A, and the control of the cutting portion 8A can suppress the binding wire W from being clamped after being cut.

[0137] <An Example of Cutting Section in First Embodiment>

[0138] Figures 5A-5D This is a diagram showing a first example of the cutting portion of the first embodiment included in the reinforcing bar binding machine of this embodiment.

[0139] like Figure 5A As shown, the cutting unit 8A1 of the first example of the first embodiment includes a fixed blade 80A fixed to the guide frame 11, a movable blade 81A1 rotatable relative to the fixed blade 80A, and a driving member 82A for rotating the movable blade 81A1.

[0140] The stationary blade 80A is provided in the conveying path of the tying wire W passing through the guide path 7. The stationary blade 80A is formed of a cylindrical member and is erected from the guide frame 11 with the axial direction of the cylindrical shape being perpendicular to the conveying direction of the tying wire W. Furthermore, a first tying wire passage 83A for passing the tying wire W is formed through the stationary blade 80A in the radial direction of the cylindrical shape.

[0141] The first twine passage 83A is formed of a slot, a hole, or the like through which the twine W passes, extends along the conveyance path of the twine W passing through the guide path 7, and opens at an end portion on the upstream side in the conveyance direction of the twine W toward the end portion 7b of the guide path 7. Also, an end portion on the downstream side in the conveyance direction of the twine W of the first twine passage 83A opens toward the guide portion 40 of the crimping portion 4A, and a blade portion 84A is formed at a rim portion of the opening at the end portion on the downstream side in the conveyance direction of the twine W. Further, the diameter of the first twine passage 83A is slightly larger than the diameter of the twine W.

[0142] Figure 1 The first embodiment of the movable blade 81A, that is, the movable blade 81A1, is provided with a shaft hole portion 85A into which the fixed blade 80A is inserted, and a second twine passage 86A1 through which the twine W passes. Also, the movable blade 81A1 is provided with a blade portion 87A provided on one side of the second twine passage 86A1 and sliding along the outer peripheral surface of the fixed blade 80A, and a passage forming member 95A1 provided on the other side of the second twine passage 86A1, that is, on the side opposite to the blade portion 87A. Further, the movable blade 81A1 is provided with a link portion 88A linking the driving member 82A.

[0143] The shaft hole portion 85A is formed of an opening having an inner diameter substantially equal to or slightly larger than the outer diameter of the fixed blade 80A. The movable blade 81A1 is supported so as to be able to rotate about the fixed blade 80A as a fulcrum by inserting the fixed blade 80A into the shaft hole portion 85A.

[0144] The second twine passage 86A1 is formed of a slot, a hole, or the like through which the twine W passes. In a state in which the movable blade 81A1 is in the standby position, the second twine passage 86A1 is continuous with the first twine passage 83A of the fixed blade 80A, and forms a conveyance path of the twine W through which the twine W before being cut passes. In a state in which the movable blade 81A1 is in the standby position, one side of the second twine passage 86A1 is a first side with respect to the conveyance path of the twine W. Also, the other side of the second twine passage 86A1 is always a second side with respect to the conveyance path of the twine W. The movable blade 81A1 is provided with the blade portion 87A on the first side with respect to the conveyance path of the twine W in a state in which the movable blade 81A1 is in the standby position. Also, the passage forming member 95A1 forming the second twine passage 86A1 is provided on the second side opposite to the first side in the movable blade 81A1. Further, in a state in which the movable blade 81A1 is in the standby position, the second twine passage 86A1 is continuous with the first twine passage 83A of the fixed blade 80A. Figure 5A In a state in which the movable blade 81A1 is in the standby position, the second twine passage 86A1 is continuous with the first twine passage 83A of the fixed blade 80A, and forms a conveyance path of the twine W through which the twine W before being cut passes. In a state in which the movable blade 81A1 is in the standby position, one side of the second twine passage 86A1 is a first side with respect to the conveyance path of the twine W. Also, the other side of the second twine passage 86A1 is always a second side with respect to the conveyance path of the twine W. The movable blade 81A1 is provided with the blade portion 87A on the first side with respect to the conveyance path of the twine W in a state in which the movable blade 81A1 is in the standby position. Also, the passage forming member 95A1 forming the second twine passage 86A1 is provided on the second side opposite to the first side in the movable blade 81A1. Further, in a state in which the movable blade 81A1 is in the standby position, the second twine passage 86A1 is continuous with the first twine passage 83A of the fixed blade 80A. Figure 5B In a state in which the movable blade 81A1 is in the standby position, the second twine passage 86A1 is continuous with the first twine passage 83A of the fixed blade 80A, and forms a conveyance path of the twine W through which the twine W before being cut passes. In a state in which the movable blade 81A1 is in the standby position, one side of the second twine passage 86A1 is a first side with respect to the conveyance path of the twine W. Also, the other side of the second twine passage 86A1 is always a second side with respect to the conveyance path of the twine W. The movable blade 81A1 is provided with the blade portion 87A on the first side with respect to the conveyance path of the twine W in a state in which the movable blade 81A1 is in the standby position. Also, the passage forming member 95A1 forming the second twine passage 86A1 is provided on the second side opposite to the first side in the movable blade 81A1. Further, in a state in which the movable blade 81A1 is in the standby position, the second twine passage 86A1 is continuous with the first twine passage 83A of the fixed blade 80A.

[0145] The second binding wire passage 86A1 includes a guide portion 93A1 that guides the cut binding wire W to a path that allows it to escape from the cutting portion 8A1 by rotating the movable blade 81A1 to move to the standby position after the cut binding wire W. The guide portion 93A1 is provided on the passage forming member 95A1.

[0146] The guide portion 93A1 is formed of a surface having projections and depressions such that the opening at the downstream end of the second binding wire passage 86A1 in the direction of feed of the binding wire W has a larger spacing in the direction of rotation of the movable blade 81A1 than the opening at the upstream end. When the movable blade 81A1 is in the standby position, the guide portion 93A1 widens toward the second side along the direction of movement of the movable blade 81A1. The guide portion 93A1 may be formed of a curved surface, a combination of a flat surface and an angle, or a combination of a flat surface and a curved surface.

[0147] The guide portion 93A1 moves the movable blade 81A1 to the fixed blade 80A by rotating the movable blade 81A1. Figure 5A 、 Figure 5D In the standby position shown, on the downstream side along the feeding direction of the tying wire W, the end 94A1 of the passage forming member 95A1 on the side opposite to the guide portion 40, that is, on the side of the second tying wire passage 86A1, is positioned substantially aligned with the tying wire sliding surface 44 of the guide portion 40.

[0148] Furthermore, when the movable knife 81A1 is moved to the standby position, the end portion 94A1 of the guide portion 93A1 protrudes toward the guide portion 40. When the movable knife 81A1 is moved to the standby position, the distance between the end portion 94A1 of the guide portion 93A1 and the end portion 45b of the guide portion 40 on the upstream side in the feeding direction of the tying wire W and opposite to the cutting portion 8A1 is smaller than the diameter of the tying wire W.

[0149] Thus, when the movable blade 81A1 is moved to the standby position, the end portion 45b of the guide portion 40 is covered by the guide portion 93A1. Furthermore, when the guide portion 93A1 includes an end portion 94A1 that protrudes toward the guide portion 40, the end portion 45b of the guide portion 40 is covered by the end portion 94A1.

[0150] The blade 87A is provided in the second binding wire passage 86A1 along the inner peripheral surface of the shaft hole 85A, and slides along the outer peripheral surface of the stationary blade 80A when the movable blade 81A1 rotates about the stationary blade 80A as a fulcrum.

[0151] When the movable knife 81A1 is Figure 5AWhen the state of the illustrated standby position is rotated in the cutting direction indicated by arrow F, the blade portion 87A moves in a direction approaching the blade portion 84A of the fixed blade 80A. Thus, the binding wire W passing through the first binding wire passage 83A of the fixed blade 80A is cut by being pinched between the blade portion 84A of the fixed blade 80A and the blade portion 87A of the movable blade 81A1. The movable blade 81A1 moves to a cut completion position further rotated in the cutting direction by a predetermined amount from the cut completion position of the binding wire W by being further rotated in the cutting direction from the cut completion position of the binding wire W. Figure 5B the illustrated rotation completion position.

[0152] Further, the movable blade 81A1 when rotated in the retreat direction indicated by arrow R from the state of the illustrated rotation completion position moves in a direction in which the first binding wire passage 83A of the fixed blade 80A is opened, in a direction in which the blade portion 87A moves away from the blade portion 84A of the fixed blade 80A, and the second binding wire passage 86A1 of the movable blade 81A1 is connected to the first binding wire passage 83A of the fixed blade 80A. Figure 5B

[0153] The link portion 88A is formed at a position opposite the shaft hole portion 85A and links the drive member 82A so as to be rotatable.

[0154] The drive member 82A is linked to the advance and retreat cylinder portion 54 driven by the Figure 2 illustrated torsion motor 51 via a link rod 89A or the like and moves along the extension direction of the screw shaft portion 53 in conjunction with linear motion and rotational motion.

[0155] Thus, the action of the advance and retreat cylinder portion 54 reciprocating along the screw shaft portion 53 is transmitted to the movable blade 81A1 via the drive member 82A and the link rod 89A, and the movable blade 81A1 rotates about the fixed blade 80A in the cutting direction indicated by arrow F and the retreat direction indicated by arrow R.

[0156] In the state in which the front end portion of the Figure 4A illustrated first engagement surface 91 is worn, when a force pulling the binding wire W is applied by the action of the binding portion 5A twisting the binding wire W wound around the reinforcing bar S, as Figure 5B illustrated, it can not be possible to hold the rear end portion WE of the binding wire W by the movable blade 81A1.

[0157] In contrast, in the structure in which the guide portion 93A1 described above is provided to the movable blade 81A1, in the state in which the movable blade 81A1 is in the Figure 5B illustrated rotation completion position, the end portion 94A1 of the guide portion 93A1 is spaced apart from the end portion 45b of the guide portion 40 more than the spacing between the second binding wire passage 86 of the conventional movable blade 81 in which the guide portion 93A1 is not provided and the end portion 45b of the guide portion 40.

[0158] Thus, in the state in which the movable blade 81A1 is in the​Figure 5B In the state of the illustrated rotation end position, even if the trailing end portion WE of the binding wire W cannot be held, as Figure 5C When the movable cutter 81A1 is rotated in the retreat direction indicated by the arrow R, the trailing end portion WE of the binding wire W comes into contact with the guide portion 93A1 and is guided into the second binding wire passage 86A1 by the action of the rotation of the movable cutter 81A1.

[0159] Also, as Figure 5D When the movable cutter 81A1 is rotated to the standby position, in the state where the trailing end portion WE of the binding wire W is guided into the second binding wire passage 86A1, the end portion 45b of the guide portion 40 is covered by the guide portion 93A1.

[0160] Therefore, even if the trailing end portion WE of the binding wire W cannot be held by the movable cutter 81A1, the situation where the trailing end portion WE of the binding wire W is pinched between the driving member 82A and the end portion 45b of the guide portion 40 is suppressed. Also, the situation where the trailing end portion WE of the binding wire W is pinched between the driving member 82A and the movable cutter 81A1 is suppressed. Thus, the situation where the bound binding wire W is difficult to be detached is suppressed, and the work efficiency is improved.

[0161] Figures 6A-6D is a view showing a second embodiment of the cutting portion of the first embodiment of the reinforcing bar binding machine according to the present embodiment.

[0162] As Figure 6A The cutting portion 8A2 of the second embodiment of the first embodiment is different from the cutting portion 8A1 of the first embodiment in the structure of the movable cutter 81A2, and therefore the details of the movable cutter 81A2 will be described below, and the detailed description of the structure will be omitted with respect to the other structures with the same reference numerals as those of the cutting portion 8A1 of the first embodiment.

[0163] Figure 1 The movable cutter 81A2 of the second embodiment of the movable cutter 81A is provided with the shaft hole portion 85A into which the fixed cutter 80A is inserted and the second binding wire passage 86A2 through which the binding wire W passes. Also, the movable cutter 81A2 is provided with the cutter portion 87A provided on one side of the second binding wire passage 86A2 and sliding along the outer peripheral surface of the fixed cutter 80A and the passage forming member 95A2 provided on the other side of the second binding wire passage 86A2, that is, the opposite side to the cutter portion 87A. In addition, the movable cutter 81A2 is provided with the link portion 88A linking the driving member 82A.

[0164] The second binding wire passage 86A2 is constituted by a groove, a hole, or the like opening through which the binding wire W passes. In the state where the movable cutter 81A2 is located at the standby position, the trailing end portion WE of the binding wire W is guided into the second binding wire passage 86A2. Figure 6AIn the state of the illustrated standby position, the second binding wire passage 86A2 is connected to the first binding wire passage 83A of the fixed blade 80A, forming a transfer path of the binding wire W for the binding wire W to pass before being cut. In the state of the movable blade 81A2 being in the standby position, one side of the second binding wire passage 86A2 is the first side with respect to the transfer path of the binding wire W. Also, the other side of the second binding wire passage 86A2 is always the second side with respect to the transfer path of the binding wire W. The movable blade 81A2 is provided with the blade portion 87A on the first side with respect to the transfer path of the binding wire W in the state of being in the standby position. Also, the movable blade 81A2 is provided with the passage forming portion 95A2 forming the second binding wire passage 86A2 on the second side opposite the first side. Further, in the state of the movable blade 81A2 being in the standby position, the passage forming portion 95A2 is positioned on the second side opposite the first side with respect to the transfer path of the binding wire W. Figure 6B In the state of the illustrated moving end position, i.e., the rotation end position, the second binding wire passage 86A2 is not connected to the first binding wire passage 83A of the fixed blade 80A.

[0165] The second binding wire passage 86A2 is provided with a guide portion 93A2 that guides the cut binding wire W to a path from which the cut binding wire W can be separated from the cutting portion 8A2 by the rotation movement of the movable blade 81A2 to the standby position after the binding wire W is cut. The guide portion 93A2 is provided to the passage forming portion 95A2.

[0166] The guide portion 93A2 is composed of a surface having a relief in a manner that the opening of the end portion of the second binding wire passage 86A2 on the downstream side with respect to the transfer direction of the binding wire W is larger than the opening of the end portion on the upstream side with respect to the rotation direction of the movable blade 81A2. In the state of the movable blade 81A1 being in the standby position, the guide portion 93A2 widens toward the second side along the moving direction of the movable blade 81A1. The guide portion 93A2 can be composed of a curved surface, can be composed of a combination of a plane and a corner, or can be composed of a combination of a plane and a curved surface.

[0167] The guide portion 93A2 guides the cut binding wire W to a path from which the cut binding wire W can be separated from the cutting portion 8A2 by the rotation movement of the movable blade 81A2 to the standby position after the binding wire W is cut. Figure 6A Figure 6D In the state of the illustrated standby position, the end portion 94A2 of the passage forming portion 95A2 on the side opposite the guide portion 40 on the downstream side with respect to the transfer direction of the binding wire W becomes a position that protrudes inward from the binding wire sliding surface 44 of the guide portion 40.

[0168] Further, the guide portion 93A2 protrudes in the direction of the guide portion 40 in the state of the movable blade 81A2 moving to the standby position. The guide portion 93A2 has a gap between the end portion 94A2 and the end portion 45b in the guide portion 40 on the upstream side with respect to the transfer direction of the binding wire W and on the side opposite the cutting portion 8A2 that is smaller than the diameter of the binding wire W in the state of the movable blade 81A2 moving to the standby position.​

[0169] Thus, in a state where the movable blade 81A2 is moved to the standby position, the end portion 45b of the guide portion 40 is covered by the end portion 94A2 of the guide portion 93A2.

[0170] In the structure in which the movable blade 81A2 is provided with the above-described guide portion 93A2, in a state where the movable blade 81A2 is in the Figure 6B end portion 94A2 of the guide portion 93A2 is larger than the interval between the second wire passage 86 and the end portion 45b of the guide portion 40 in the conventional movable blade 81 in which the guide portion 93A2 is not provided.

[0171] Thus, in a state where the movable blade 81A2 is in the Figure 6B end position, even if the rear end portion WE of the wire W cannot be held, when the movable blade 81A2 is rotated in the direction indicated by the arrow R as Figure 6C indicated, the rear end portion WE of the wire W comes into contact with the guide portion 93A2 or the end portion 94A2 of the guide portion 93A2, and is guided into the second wire passage 86A2 by the action of the rotation of the movable blade 81A2.

[0172] Also, as Figure 6D indicated, in a state where the rear end portion WE of the wire W is guided into the second wire passage 86A2 when the movable blade 81A2 is rotated to the standby position, the end portion 45b of the guide portion 40 is covered by the end portion 94A2 of the guide portion 93A2.

[0173] Thus, even if the rear end portion WE of the wire W cannot be held by the movable blade 81A2, the case in which the rear end portion WE of the wire W is pinched between the driving member 82A and the end portion 45b of the guide portion 40 can be suppressed. Also, the case in which the rear end portion WE of the wire W is pinched between the driving member 82A and the movable blade 81A2 can be suppressed. Thus, the case in which the tied wire W is difficult to be detached can be suppressed, and the work efficiency is improved.

[0174] Figures 7A-7D is a view showing a third example of the cutting portion of the first embodiment of the steel bar tying machine according to the present embodiment.

[0175] As Figure 7A indicated, the structure of the movable blade 81A3 of the cutting portion 8A3 of the third example of the first embodiment is different from the cutting portion 8A1 of the first example described above, and therefore the details of the movable blade 81A3 will be described below, and the detailed description of the structure will be omitted with respect to the other structures with the same reference numerals as those of the cutting portion 8A1 of the first embodiment.

[0176] Figure 1The movable blade 81A3 of the third embodiment of the movable blade 81A shown here includes an axial hole 85A for inserting the stationary blade 80A and a second wire passage 86A3 for passing the tying wire W. Furthermore, the movable blade 81A3 includes a blade portion 87A disposed on one side of the second wire passage 86A3 and sliding along the outer circumference of the stationary blade 80A; and a passage-forming member 95A3 disposed on the other side of the second wire passage 86A3, i.e., on the side opposite the blade portion 87A. Furthermore, the movable blade 81A3 includes a connecting portion 88A for connecting to the driving member 82A.

[0177] The second tying wire passage 86A3 is formed by an opening such as a groove or a hole for the tying wire W to pass through. Figure 7A In the state of the standby position shown, the second tying wire passage 86A3 is connected to the first tying wire passage 83A of the fixed knife 80A, forming a transmission path for the tying wire W through which the tying wire W passes before being cut. When the movable knife 81A3 is in the standby position, one side of the second tying wire passage 86A3 is the first side relative to the transmission path of the tying wire W. Moreover, the other side of the second tying wire passage 86A3 is always the second side relative to the transmission path of the tying wire W. When the movable knife 81A3 is in the standby position, the knife portion 87A is provided on the first side relative to the transmission path of the tying wire W. Furthermore, the movable knife 81A3 is provided with a passage forming component 95A3 forming the second tying wire passage 86A3 on the second side opposite to the first side. In addition, when the movable knife 81A3 is in the Figure 6B In the state of the movement end position shown, that is, the rotation end position, the second binding wire passage 86A3 is not communicated with the first binding wire passage 83A of the stationary blade 80A.

[0178] The second binding wire passage 86A3 includes a guide portion 93A3 that guides the cut binding wire W to a path that allows it to escape from the cutting portion 8A3 as the movable blade 81A3 rotates to move to the standby position after the cutting of the binding wire W. The guide portion 93A3 is provided on the passage forming member 95A3.

[0179] The guide portion 93A3 moves the movable blade 81A3 to the fixed blade 80A by rotating the movable blade 81A3. Figure 7A 、 Figure 7D In the standby position shown, the end 94A3 of the passage forming member 95A3 on the side facing the guide portion 40 protrudes toward the guide portion 40 on the downstream side along the feeding direction of the tying wire W. As a result, the second tying wire passage 86A3 extends toward the guide portion 40 to form a guide portion 93A3.

[0180] The interval between the end portion 94A3 of the guide portion 93A3 and the end portion 45b of the guide portion 40 on the upstream side in the conveying direction of the binding wire W and opposite to the cutting portion 8A3 is smaller than the diameter of the binding wire W in a state where the movable blade 81A3 is moved to the standby position.

[0181] Thus, in a state where the movable blade 81A3 is moved to the standby position, the end portion 45b of the guide portion 40 is covered by the end portion 94A3 of the guide portion 93A3.

[0182] In the structure where the movable blade 81A3 is provided with the above-described guide portion 93A3, when the movable blade 81A3 is rotated from the state shown in the arrow R shown in the retreat direction from the rotation end position of the Figure 6B When the end portion 94A3 of the guide portion 93A3 is contacted by the rear end portion WE of the binding wire W when the movable blade 81A3 is rotated in the retreat direction shown by the arrow R from the state shown in the rotation end position, the end portion 94A3 is inclined in the direction of the force acting to guide the binding wire W in the direction of the second binding wire passage 86A3.

[0183] Thus, in a state where the movable blade 81A3 is moved to the standby position, the end portion 45b of the guide portion 40 is covered by the end portion 94A3 of the guide portion 93A3. Figure 7B Even if the rear end portion WE of the binding wire W cannot be held when the movable blade 81A3 is rotated in the retreat direction shown by the arrow R in a state where the movable blade 81A3 is in the rotation end position, the rear end portion WE of the binding wire W is contacted by the guide portion 93A3 and is guided into the second binding wire passage 86A3 by the action of the rotation of the movable blade 81A3. Also, even if the rear end portion WE of the binding wire W is not guided into the second binding wire passage 86A3 as shown in Figure 7C Even if the rear end portion WE of the binding wire W cannot be held when the movable blade 81A3 is rotated in the retreat direction shown by the arrow R in a state where the movable blade 81A3 is in the rotation end position, the rear end portion WE of the binding wire W is contacted by the guide portion 93A3 and is guided into the second binding wire passage 86A3 by the action of the rotation of the movable blade 81A3. Also, even if the rear end portion WE of the binding wire W is not guided into the second binding wire passage 86A3 as shown in

[0184] Also, as shown in Figure 7D When the movable blade 81A3 is rotated to the standby position, the end portion 45b of the guide portion 40 is covered by the end portion 94A3 of the guide portion 93A3.

[0185] Thus, even if the rear end portion WE of the binding wire W cannot be held by the movable blade 81A3, the case where the rear end portion WE of the binding wire W is pinched between the driving member 82A and the end portion 45b of the guide portion 40 can be suppressed. Also, the case where the rear end portion WE of the binding wire W is pinched between the driving member 82A and the movable blade 81A3 can be suppressed. Thus, the case where the binding wire W after binding is difficult to be detached can be suppressed, and the work efficiency is improved.

[0186] Figures 8A-8D is a view showing a fourth example of the cutting portion of the first embodiment of the reinforcing bar binding machine according to the present embodiment.

[0187] As shown in Figure 8AAs shown, the cutting portion 8A4 of the fourth embodiment of the first embodiment differs in structure of the movable blade 81A4 from the cutting portion 8A1 of the first embodiment described above, and therefore the details of the movable blade 81A4 will be described below, and as for other structures, the same reference numerals as those of the cutting portion 8A1 of the first embodiment are attached and detailed description of the structures will be omitted.

[0188] Figure 1 The movable blade 81A4 of the fourth embodiment of the movable blade 81A shown has a shaft hole portion 85A into which the fixed blade 80A is inserted and a second bundling wire passage 86A4 through which the bundling wire W passes. Further, the movable blade 81A4 has a blade portion 87A provided on one side of the second bundling wire passage 86A4 and sliding along the outer peripheral surface of the fixed blade 80A, and a passage forming member 95A4 provided on the other side of the second bundling wire passage 86A4, that is, on the opposite side of the blade portion 87A. In addition, the movable blade 81A4 has a linking portion 88A linking the driving member 82A.

[0189] The second bundling wire passage 86A4 is constituted of an opening such as a groove, a hole, or the like through which the bundling wire W passes. In a state where the movable blade 81A4 is in the standby position, the second bundling wire passage 86A4 is continuous with the first bundling wire passage 83A of the fixed blade 80A, and forms a transfer path of the bundling wire W through which the bundling wire W passes before being cut. In a state where the movable blade 81A4 is in the standby position, one side of the second bundling wire passage 86A4 is a first side with respect to the transfer path of the bundling wire W. Further, the other side of the second bundling wire passage 86A4 is always a second side with respect to the transfer path of the bundling wire W. The movable blade 81A4 has the blade portion 87A provided on the first side with respect to the transfer path of the bundling wire W in a state where the movable blade 81A4 is in the standby position. Further, the movable blade 81A4 has the passage forming member 95A4 forming the second bundling wire passage 86A4 provided on the second side opposite to the first side. In addition, in a state where the movable blade 81A4 is in the standby position, the driving member 82A is linked to the movable blade 81A4 via the linking portion 88A. Figure 8A In a state where the movable blade 81A4 is in the standby position, the second bundling wire passage 86A4 is continuous with the first bundling wire passage 83A of the fixed blade 80A, and forms a transfer path of the bundling wire W through which the bundling wire W passes before being cut. In a state where the movable blade 81A4 is in the standby position, one side of the second bundling wire passage 86A4 is a first side with respect to the transfer path of the bundling wire W. Further, the other side of the second bundling wire passage 86A4 is always a second side with respect to the transfer path of the bundling wire W. The movable blade 81A4 has the blade portion 87A provided on the first side with respect to the transfer path of the bundling wire W in a state where the movable blade 81A4 is in the standby position. Further, the movable blade 81A4 has the passage forming member 95A4 forming the second bundling wire passage 86A4 provided on the second side opposite to the first side. In addition, in a state where the movable blade 81A4 is in the standby position, the driving member 82A is linked to the movable blade 81A4 via the linking portion 88A. Figure 8B In a state where the movable blade 81A4 is in the standby position, the second bundling wire passage 86A4 is continuous with the first bundling wire passage 83A of the fixed blade 80A, and forms a transfer path of the bundling wire W through which the bundling wire W passes before being cut. In a state where the movable blade 81A4 is in the standby position, one side of the second bundling wire passage 86A4 is a first side with respect to the transfer path of the bundling wire W. Further, the other side of the second bundling wire passage 86A4 is always a second side with respect to the transfer path of the bundling wire W. The movable blade 81A4 has the blade portion 87A provided on the first side with respect to the transfer path of the bundling wire W in a state where the movable blade 81A4 is in the standby position. Further, the movable blade 81A4 has the passage forming member 95A4 forming the second bundling wire passage 86A4 provided on the second side opposite to the first side. In addition, in a state where the movable blade 81A4 is in the standby position, the driving member 82A is linked to the movable blade 81A4 via the linking portion 88A.

[0190] The cutting portion 8A4 has a discharge guide portion 96A4 that guides the discharge of the bundling wire W pinched between the movable blade 81A4 and the driving member 82A. The discharge guide portion 96A4 is provided in the passage forming member 95A4 on a surface opposite to the driving member 82A linked to the movable blade 81A4 via the linking portion 88A. The movable blade 81A4 and the driving member 82A are rotated about the fixed blade 80A as a fulcrum, and the movable blade 81A4 is moved to the Figure 8A 、 Figure 8DThe discharge guide portion 96A4 is constituted by a face in which an opening between the passage forming member 95A4 of the movable cutter 81A4 and the drive member 82A in a state where the movable cutter 81A4 is moved to the standby position is widened toward the guide portion 40 to an opening of a diameter or more of the binding wire W. The discharge guide portion 96A4 can be constituted by a curved face, can be constituted by a flat face, or can be constituted by a concave-convex face.

[0191] In a state where the movable cutter 81A4 is in the standby position, Figure 8B In a state where the movable cutter 81A4 is in the standby position, Figure 8C The movable cutter 81A4 is rotated in a direction indicated by an arrow R as shown, and when the movable cutter 81A4 is rotated to the standby position as shown, Figure 8D In a state where the movable cutter 81A4 is in the standby position,

[0192] Therefore, even if the rear end portion WE of the binding wire W cannot be held by the movable cutter 81A4, the condition where the bound binding wire W is difficult to be detached is suppressed, and the work efficiency is improved.

[0193] Figures 9A-9D is a view showing a fifth embodiment of the cutting portion of the steel bar binding machine according to the first embodiment of the present embodiment.

[0194] As shown in Figure 9A The cutting portion 8A5 of the fifth embodiment of the first embodiment is different from the cutting portion 8A1 of the first embodiment in a structure of a movable cutter 81A5, and therefore, details of the movable cutter 81A5 will be described below, and as for other structures, the same reference numerals as those of the cutting portion 8A1 of the first embodiment are attached, and detailed description of the structures is omitted.

[0195] Figure 1 The movable cutter 81A5 of the fifth embodiment of the movable cutter 81A shown is provided with a shaft hole portion 85A into which the fixed cutter 80A is inserted and a second binding wire passage 86A5 through which the binding wire W passes. Further, the movable cutter 81A5 is provided with a cutter portion 87A provided on one side of the second binding wire passage 86A5 and sliding along an outer peripheral face of the fixed cutter 80A, and a passage forming member 95A5 provided on the other side of the second binding wire passage 86A5, that is, on a portion on the opposite side to the cutter portion 87A. In addition, the movable cutter 81A5 is provided with a link portion 88A linking the drive member 82A.

[0196] The second binding wire passage 86A5 is constituted by an opening such as a groove, a hole, or the like through which the binding wire W passes. In a state where the movable cutter 81A5 is in the standby position, Figure 9AIn the state of the illustrated standby position, the second binding wire passage 86A5 is connected to the first binding wire passage 83A of the fixed blade 80A, forming a transfer path of the binding wire W for the binding wire W to pass before being cut. In the state where the movable blade 81A5 is in the standby position, one side of the second binding wire passage 86A5 is the first side with respect to the transfer path of the binding wire W. Also, the other side of the second binding wire passage 86A5 is always the second side with respect to the transfer path of the binding wire W. The movable blade 81A5 is provided with the blade portion 87A on the first side with respect to the transfer path of the binding wire W in the state of being in the standby position. Also, the movable blade 81A5 is provided with the passage forming portion 95A5 that forms the second binding wire passage 86A5 on the second side opposite to the first side. Further, in the state where the movable blade 81A5 is in the standby position, the passage forming portion 95A5 of the movable blade 81A5 is positioned in the space based on the guide portion 40. Figure 9B In the state of the illustrated moving end position, i.e., the rotation end position, the second binding wire passage 86A5 is not connected to the first binding wire passage 83A of the fixed blade 80A.

[0197] The cutting portion 8A5 is provided with the suppression portion 96A5 that suppresses the binding wire W from being pinched between the movable blade 81A5 and the driving portion 82A. The suppression portion 96A5 is formed in the movable blade 81A5 in the state where the movable blade 81A5 is moved to the standby position by the rotation of the fixed blade 80A as a fulcrum. Figure 9A 、 Figure 9D In the state of the illustrated standby position, the end portion of the passage forming portion 95A5 opposite to the guide portion 40 is retracted in the direction away from the guide portion 40.

[0198] In the state where the movable blade 81A5 is in the standby position, the end portion of the passage forming portion 95A5 opposite to the guide portion 40 is retracted in the direction away from the guide portion 40. Figure 9B In the state of the illustrated rotation end position, the end portion of the passage forming portion 95A5 opposite to the guide portion 40 is retracted in the direction away from the guide portion 40. Figure 9C The movable blade 81A5 is rotated in the retraction direction indicated by the arrow R as illustrated, and when rotated to the standby position as illustrated, a space based on the suppression portion 96A5 is formed between the guide portion 40 and the passage forming portion 95A5 of the movable blade 81A5. Thus, the binding wire W is not pinched between the movable blade 81A5 and the driving portion 82A. Figure 9D The movable blade 81A5 is rotated in the retraction direction indicated by the arrow R as illustrated, and when rotated to the standby position as illustrated, a space based on the suppression portion 96A5 is formed between the guide portion 40 and the passage forming portion 95A5 of the movable blade 81A5. Thus, the binding wire W is not pinched between the movable blade 81A5 and the driving portion 82A.

[0199] Thus, even if the end portion WE of the binding wire W cannot be held by the movable blade 81A5, the condition where the bound binding wire W is difficult to be detached can be suppressed, and the work efficiency is improved.

[0200] Figures 10A-10E is a view that shows a sixth embodiment of the cutting portion of the first embodiment that the reinforcing bar binding machine of the present embodiment is provided with.

[0201] As illustrated in Figure 10AAs shown, the cutting portion 8A6 of the sixth embodiment of the first embodiment has a different structure of the movable knife 81A6 and the driving component 82A6 compared to the cutting portion 8A1 of the above-mentioned first embodiment. Therefore, the details of the movable knife 81A6 and the driving component 82A6 are described below. Regarding other structures, the same figure marks as the cutting portion 8A1 of the first embodiment are marked and the detailed description of the structure is omitted.

[0202] Figure 1 The movable blade 81A6 of the sixth embodiment of the movable blade 81A shown here includes an axial hole 85A for inserting the stationary blade 80A and a second wire passage 86A6 for passing the tying wire W. Furthermore, the movable blade 81A6 includes a blade portion 87A disposed on one side of the second wire passage 86A6 and sliding along the outer circumference of the stationary blade 80A, and a passage-forming member 95A6 disposed on the other side of the second wire passage 86A6, i.e., on the side opposite to the blade portion 87A. Furthermore, the movable blade 81A5 includes a connecting portion 88A to which the driving member 82A6 is connected.

[0203] The second tying wire passage 86A6 is formed by an opening such as a groove or a hole for the tying wire W to pass through. Figure 10A In the state of the standby position shown, the second tying wire passage 86A6 is connected to the first tying wire passage 83A of the fixed knife 80A, forming a transmission path for the tying wire W through which the tying wire W passes before being cut. When the movable knife 81A6 is in the standby position, one side of the second tying wire passage 86A6 is the first side relative to the transmission path of the tying wire W. Moreover, the other side of the second tying wire passage 86A6 is always the second side relative to the transmission path of the tying wire W. When the movable knife 81A6 is in the standby position, the knife portion 87A is provided on the first side relative to the transmission path of the tying wire W. Furthermore, the movable knife 81A6 is provided with a passage forming component 95A6 that forms the second tying wire passage 86A6 on the second side opposite to the first side. In addition, when the movable knife 81A6 is in the Figure 10B In the state of the movement end position shown, that is, the rotation end position, the second binding wire passage 86A6 is not communicated with the first binding wire passage 83A of the stationary blade 80A.

[0204] The movable blade 81A6 includes a suppressing portion 96A6 that suppresses the binding wire W from being caught between the passage forming member 95A6 and the driving member 82A6. The suppressing portion 96A6 is provided with a convex portion protruding toward the driving member 82A6 on the surface of the movable blade 81A6 that faces the driving member 82A6 connected to the movable blade 81A6 via the connecting portion 88A. Figure 10A 、 Figure 10EIn the state of the standby position shown, the movable blade 81A6 and the driving member 82A6 face the guide portion 40. The suppressing portion 96A6 is provided at the end portion of the passage forming member 95A6 on the side facing the guide portion 40.

[0205] The driving member 82A6 includes a suppressing portion 97A6 that prevents the binding wire W from being caught between it and the passage-forming member 95A6. The suppressing portion 97A6 is provided with a protrusion that projects toward the movable blade 81A6 on the surface of the driving member 82A6 that faces the passage-forming member 95A6. The suppressing portion 97A6 is provided at the end of the driving member 82A6 that faces the guide portion 40.

[0206] It should be noted that the cutting portion 8A6 can be a structure in which the distance between the passage forming part 95A6 of the movable knife 81A6 and the driving part 82A6 is smaller than the diameter of the binding wire W when the movable knife 81A6 moves to the standby position, and can be a structure in which a suppression part is provided on at least one of the movable knife 81A6 and the driving part 82A6.

[0207] When the movable knife 81A6 is in Figure 10B In the state of the rotation end position shown, when the rear end WE of the tying wire W cannot be held, as shown in FIG. Figure 10C When the movable blade 81A6 rotates in the retreat direction indicated by the arrow R, the rear end WE of the tying wire W contacts the restraining portion 96A6 of the movable blade 81A6, thereby preventing the rear end WE of the tying wire W from being clamped between the movable blade 81A6 and the driving member 82A6. Figure 10D As shown, the rear end WE of the tying wire W contacts the inhibiting portion 97A6 of the driving member 82A6, which can prevent the rear end WE of the tying wire W from being caught between the movable knife 81A6 and the driving member 82A6. Figure 10E When the movable blade 81A6 rotates to the standby position, the restraining portion 96A6 of the movable blade 81A6 and the restraining portion 97A6 of the driving member 82A6 can prevent the rear end portion WE of the binding wire W from being clamped between the movable blade 81A6 and the driving member 82A6.

[0208] Therefore, even if the rear end portion WE of the binding wire W cannot be held by the movable blade 81A6, it is possible to prevent the binding wire W from being difficult to come off after binding, thereby improving the working efficiency.

[0209] Figures 11A-11C It is a diagram showing a seventh example of the cutting portion of the first embodiment included in the reinforcing bar binding machine of this embodiment.

[0210] like Figure 11AAs shown, the cutting portion 8A7 of the seventh embodiment of the first embodiment has a different structure of the movable knife 81A7 relative to the cutting portion 8A1 of the above-mentioned first embodiment. Therefore, the details of the movable knife 81A7 are described below. Regarding other structures, the same figure marks as the cutting portion 8A1 of the first embodiment are marked and the detailed description of the structure is omitted.

[0211] Figure 1 The movable blade 81A7 of the seventh embodiment of the movable blade 81A shown here includes an axial hole 85A for inserting the stationary blade 80A and a second wire passage 86A7 for passing the tying wire W. Furthermore, the movable blade 81A7 includes a blade portion 87A disposed on one side of the second wire passage 86A7 and sliding along the outer circumference of the stationary blade 80A; and a passage-forming member 95A7 disposed on the other side of the second wire passage 86A7, i.e., on the side opposite the blade portion 87A. Furthermore, the movable blade 81A7 includes a connecting portion 88A for connecting to the driving member 82A6.

[0212] The second tying wire passage 86A7 is formed by an opening such as a groove or a hole for the tying wire W to pass through. Figure 11A In the state of the standby position shown, the second tying wire passage 86A7 is connected to the first tying wire passage 83A of the fixed knife 80A, forming a transmission path for the tying wire W through which the tying wire W passes before being cut. When the movable knife 81A7 is in the standby position, one side of the second tying wire passage 86A7 is the first side relative to the transmission path of the tying wire W. Moreover, the other side of the second tying wire passage 86A7 is always the second side relative to the transmission path of the tying wire W. When the movable knife 81A7 is in the standby position, the knife portion 87A is provided on the first side relative to the transmission path of the tying wire W. Furthermore, the movable knife 81A7 is provided with a passage forming component 95A7 forming the second tying wire passage 86A7 on the second side opposite to the first side. In addition, when the movable knife 81A7 is in the Figure 11B In the state of the movement end position shown, that is, the rotation end position, the second binding wire passage 86A7 is not communicated with the first binding wire passage 83A of the stationary blade 80A.

[0213] The movable knife 81A7 includes a movement change suppressing portion 96A7 that suppresses movement change of the binding wire W between the movable knife 81A7 and the guide portion 40. The movement change suppressing portion 96A7 moves to the movable knife 81A7 by rotating around the fixed knife 80A as a fulcrum. Figure 11C 、 Figure 11B In the illustrated movement end position, that is, the rotation end position, the end portion of the movable blade 81A7 facing the end portion 45b of the guide portion 40 is provided with a convex portion that protrudes toward the guide portion 40.

[0214] When the movable knife 81A7 is in Figure 11CIn the illustrated state of the rotation end position, the action change suppression portion 96A7 is opposed to the guide portion 40, and thus the spacing between the movable blade 81A7 and the guide portion 40 is narrower than in a structure in which the action change suppression portion 96A7 is not provided.

[0215] In the state in which the front end portion of the first engagement surface 91 described above is worn, there is a case in which the rear end portion WE of the binding wire W cannot be held. Even in such a case, when a force that pulls the binding wire W is applied due to the action of twisting the binding wire W that is wound around the reinforcing bar S by the binding portion 5A, as shown by the double-dotted line, Figures 12A-12E the case in which the action of the binding wire W changes greatly can be suppressed. Thus, the degree of freedom of movement of the binding wire W between the guide portion 40 and the movable blade 81A7 can be limited. Therefore, when the movable blade 81A7 is rotated to the standby position, the end portion WE of the binding wire W can be suppressed from moving to a position that is sandwiched between the movable blade 81A7 and the drive member 82A.

[0216] Therefore, when the movable blade 81A7 is rotated to the standby position, the case in which the binding wire W after binding is difficult to detach can be suppressed, and the work efficiency is improved.

[0217] Figure 12A is a view that shows a first embodiment of the crimping formation portion of the first embodiment of the reinforcing bar binding machine according to the present embodiment.

[0218] As shown in Figure 12C , the crimping formation portion 4A1 of the first embodiment of the first embodiment of the present embodiment is provided with a binding wire evacuation portion 98A1 that suppresses the case in which the binding wire W is sandwiched between the guide portion 40A1 and the cutting portion 8.

[0219] The binding wire evacuation portion 98A1 is provided at the end portion on the side opposite to the movable blade 81 in the guide portion 40A1. The binding wire evacuation portion 98A1 is constituted by a surface that is inclined in a direction in which the spacing between the binding wire sliding surface 44 and the movable blade 81 becomes larger. The binding wire evacuation portion 98A1 can be constituted by a flat surface, can be constituted by a curved surface, or can be constituted by a concave-convex surface.

[0220] The end portion Pe on the downstream side in the conveying direction of the binding wire W of the binding wire evacuation portion 98A1 is positioned at a position on the upstream side in the conveying direction of the binding wire W from the position at which the conveying path WS of the binding wire W before crimping formation and the binding wire sliding surface 44 intersect, as shown by the double-dotted line.

[0221] Thus, the front end of the binding wire W before crimping formation intersects with the binding wire sliding surface 44, the binding wire W is guided toward the third binding wire guide 43, and the binding wire W can be crimped.

[0222] In the state in which the movable blade 81 is positioned at the standby position, Figure 12DIn the state of the rotation end position shown, when the rear end WE of the tying wire W cannot be held, even if Figure 12E As shown, the movable knife 81 rotates in the retreat direction indicated by the arrow R, and the rear end WE of the tying wire W does not enter the second tying wire passage 86 but contacts the driving member 82. However, since the tying wire retreat portion 98A1 is provided, the gap between the tying wire sliding surface 44 and the movable knife 81 is wider than before. Therefore, even if the movable knife 81 is rotated as shown in FIG. Figures 13A-13E Even when the movable blade 81 is rotated to the standby position as shown, it is possible to prevent the binding wire W from being sandwiched between the binding wire sliding surface 44 and the movable blade 81 and being bent.

[0223] Therefore, even if the rear end portion WE of the binding wire W cannot be held by the movable blade 81 , it is possible to prevent the binding wire W from being difficult to come off after binding, thereby improving the working efficiency.

[0224] Figure 13A This is a diagram showing a second example of the curl forming portion of the first embodiment included in the reinforcing bar binding machine of this embodiment.

[0225] like Figure 13C As shown, the curl forming portion 4A2 of the second example of the first embodiment includes a binding wire retracting portion 98A2 for suppressing the binding wire W from being pinched between the guide portion 40A2 and the cutting portion 8 .

[0226] The wire retracting portion 98A2 is provided at the end portion of the guide portion 40A2 opposite the movable blade 81. The wire retracting portion 98A2 is formed by a surface of the guide portion 40A2 on the upstream side in the feeding direction of the wire W, i.e., the end portion opposite the movable blade 81, which is retreated in a direction away from the movable blade 81.

[0227] The binding wire retreat portion 98A2 is located upstream in the feeding direction of the binding wire W from a position where the feeding path WS of the binding wire W before being curled, as indicated by a two-dot chain line, contacts the binding wire sliding surface 44 .

[0228] As a result, the front end of the binding wire W before being curled comes into contact with the binding wire sliding surface 44 , and the binding wire W is guided toward the third binding wire guide 43 , so that the binding wire W can be curled.

[0229] When the movable knife 81 is in Figure 13D In the state of the rotation end position shown, when the rear end WE of the tying wire W cannot be held, even if Figure 13E As shown, when the movable knife 81 rotates in the retreat direction indicated by the arrow R, the rear end WE of the tying wire W does not enter the second tying wire passage 86 but contacts the driving member 82. However, since the tying wire retreat portion 98A2 is provided, the gap between the tying wire sliding surface 44 and the movable knife 81 is wider than before. Therefore, even if the movable knife 81 Figures 14A-14EThe rotation to the standby position also suppresses the bundling wire W from being bent by being clamped between the bundling wire sliding surface 44 and the movable blade 81.

[0230] Therefore, even if the rear end portion WE of the bundling wire W cannot be held by the movable blade 81, the condition in which the bundled bundling wire W is difficult to be detached is suppressed, and the work efficiency is improved.

[0231] Figure 14A is a view showing a third example of the crimping formation portion of the first embodiment of the reinforcing bar bundling machine according to the present embodiment.

[0232] As shown in Figure 14B , the crimping formation portion 4A3 of the third example of the first embodiment is provided with a movable range suppression portion 98A3 that reduces the movable range of the bundling wire W between the guide portion 40A3 and the cutting portion 8.

[0233] The movable range suppression portion 98A3 is provided at the end portion of the guide portion 40A3 on the side opposite the movable blade 81. The movable range suppression portion 98A3 is constituted by a surface that extends the end portion of the guide portion 40A3 on the side opposite the movable blade 81 toward the movable blade 81 and is inclined in a direction in which the interval with the movable blade 81 narrows with respect to the bundling wire sliding surface 44.

[0234] When the movable blade 81 is rotated in the cutting direction indicated by the arrow F to cut the bundling wire W as shown in Figure 14C , the bundling wire W can move in the direction of the guide portion 40A3 as shown by the solid line. The guide portion 40A3 narrows the interval with the movable blade 81 by being provided with the movable range suppression portion 98A3, and the movable range of the bundling wire W is reduced.

[0235] Thus, as shown in Figure 14D , even if the movable blade 81 is rotated to the rotation end position, the state in which the bundling wire W is held by the second bundling wire passage 86 can be ensured by the action of twisting the bundling wire W wound around the reinforcing bar S by the bundling portion 5A to apply a pulling force to the bundling wire W.

[0236] Also, when the movable blade 81 is rotated in the retreat direction indicated by the arrow R as shown in Figure 14E , the rear end portion WE of the bundling wire W is guided into the second bundling wire passage 86, and even if the movable blade 81 is rotated to the standby position as shown in Figures 15A-15D , the condition in which the bundling wire W is clamped between the movable blade 81 and the drive member 82 can be suppressed.

[0237] Therefore, the condition in which the bundled bundling wire W is difficult to be detached can be suppressed, and the work efficiency is improved.

[0238] Figure 15AThis is a diagram showing a fourth example of the curl forming portion of the first embodiment included in the reinforcing bar binding machine of this embodiment.

[0239] like Figure 15B As shown, the curl forming portion 4A4 of the fourth example of the first embodiment includes a movable range suppressing portion 98A4 that reduces the movable range of the binding wire W between the guide portion 40A4 and the cutting portion 8 .

[0240] The movable range suppressing portion 98A4 is provided at the end portion of the guide portion 40A4 facing the movable blade 81. The movable range suppressing portion 98A4 is configured such that the end portion of the guide portion 40A4 facing the movable blade 81 extends toward the movable blade 81.

[0241] When the movable knife 81 is in Figure 15C In the state of the rotation end position shown, if the rear end WE of the binding wire W cannot be held, in a structure without the movable range limiting portion 98A4, the binding wire W can move to the position shown by the two-dot chain line. In contrast, by extending the guide portion 40A4 toward the movable blade 81 to provide the movable range limiting portion 98A4, the gap between the guide portion 40A4 and the movable blade 81 is narrowed, thereby reducing the movable range of the binding wire W.

[0242] Therefore, as Figure 15D When the movable knife 81 rotates in the retreat direction indicated by the arrow R, the rear end WE of the tying wire W is pressed against the driving member 82 and guided toward the tying wire sliding surface 44. Figures 16A-16D Even when the guide member 82 is rotated to the standby position as shown, it is possible to prevent the binding wire W from being caught between the driving member 82 and the guide portion 40A4.

[0243] Therefore, it is possible to prevent the binding wire W from becoming difficult to separate after binding, thereby improving the working efficiency.

[0244] Figure 17 FIG. 1 is a diagram showing another embodiment of the reinforcing bar binding machine of this embodiment. Figure 18 2 is a block diagram showing another embodiment of the reinforcing bar binding machine of this embodiment. Figure 2 This is a flowchart showing another embodiment of the reinforcing bar binding machine of this embodiment, in which the cutting unit 8 is controlled to suppress the binding wire W from being clamped after being cut.

[0245] Rebar Bundling Machine 1A will pass Figures 16A-16D The forward and backward movement of the cylinder 54 is caused by the rotation of the twisting motor 51. Figure 18The illustrated drive member 82 transmits, drives the movable cutter 81 of the cutting-off section 8. Thus, the twisting motor 51 becomes a drive section of the drive member 82. The reinforcing bar tying machine 1A is provided with a control section 100 that controls the twisting motor 51. The control section 100 controls the conveying motor 31, the solenoid 61, and the twisting motor 51 in accordance with a program stored in advance when the switch 101 is operated by the operation of the trigger 10t.

[0246] The control section 100 drives the conveying motor 31 in step SA1 when the switch 101 is operated by the operation of the trigger 10t. Figure 1 The control section 100 controls the amount of rotation of the conveying motor 31 by a known method, and conveys the tying wire W by a predetermined amount by rotating the conveying motor 31 by a predetermined amount, thereby winding the tying wire W around the reinforcing bar S by the crimping section 4A illustrated in FIG. 1, for example. Figure 2 The control section 100 controls the amount of rotation of the conveying motor 31 by a known method, and conveys the tying wire W by a predetermined amount by rotating the conveying motor 31 by a predetermined amount, thereby winding the tying wire W around the reinforcing bar S by the crimping section 4A illustrated in FIG. 1, for example.

[0247] The control section 100 stops the conveying motor 31 when the conveying motor 31 is rotated by a predetermined amount of the tying wire W, in step SA2. The control section 100 drives the solenoid 61 to operate the spool brake 60 to restrict the rotation of the tying wire spool 20, in step SA3 when the conveying motor 31 is stopped.

[0248] The control section 100 drives the solenoid 61, and drives the twisting motor 51 to rotate in the forward direction, in step SA4. The control section 100 controls the amount of rotation of the twisting motor 51 by a known method, and first conveys the advancing and retreating cylinder section 54 in the forward direction by the action illustrated in FIG. 3, for example. Figure 16A The advancing and retreating cylinder section 54 is conveyed in the forward direction by the action illustrated in FIG. 3, and the movable cutter 81 is rotated in the cutting-off direction indicated by the arrow F, thereby cutting the tying wire W, as illustrated in FIG. 4. Figure 16B The advancing and retreating cylinder section 54 is conveyed in the forward direction by the action illustrated in FIG. 3, and the movable cutter 81 is rotated in the cutting-off direction indicated by the arrow F, thereby cutting the tying wire W, as illustrated in FIG. 4.

[0249] In addition, in conjunction with the advancement of the advancing and retreating cylinder section 54, the twisting hook 55 is operated in the closing direction to hold a portion of the tying wire W wound in a loop. After the movable cutter 81 is rotated to the movement end position, i.e., the rotation end position, the connection of the advancing and retreating cylinder section 54 to the drive member 82 is released, and the twisting hook 55 holding the tying wire W is rotated by the rotation of the advancing and retreating cylinder section 54, thereby twisting the tying wire W.

[0250] When the control section 100 makes the twist motor 51 rotate in the forward direction by the amount required for the above-described twisting operation, in step SA5, the control section 100 reverses the twist motor 51. When the twist motor 51 is reversed, the advance and retreat cylinder section 54 and the twist hook 55 move to the rear, and the twist hook 55 opens to separate the binding wire W. The control section 100 reverses the twist motor 51 until the advance and retreat cylinder section 54 and the twist hook 55 move to the standby position. In the middle of the movement of the advance and retreat cylinder section 54 and the twist hook 55 to the standby position, the advance and retreat cylinder section 54 is again connected to the drive member 82, and as shown in FIG. 8, the movable knife 81 rotates in the direction of retreat indicated by the arrow R. Figure 16A

[0251] When the control section 100 reverses the twist motor 51 by the amount required for the operation of moving the advance and retreat cylinder section 54 and the movable knife 81 to the standby position, in step SA6, the control section 100 stops the twist motor 51.

[0252] In the state in which the front end portion of the first engagement surface 91 is worn, after the movable knife 81 rotates to the movement end position, i.e., the rotation end position, as shown in FIG. 9, it can not be possible to hold the rear end portion WE of the binding wire W with the movable knife 81 when a force that pulls the binding wire W is applied by the operation of twisting the binding wire W wound around the reinforcing bar S with the binding section 5A. Figure 16B

[0253] When the rear end portion WE of the binding wire W cannot be held with the movable knife 81, in the operation of rotating the movable knife 81 in the direction of retreat indicated by the arrow R, as shown in FIG. 10, the rear end portion WE of the binding wire W can be pinched between the drive member 82 and the movable knife 81. Figure 16C

[0254] In consideration of such a situation, after the movable knife 81 is rotated to the standby position, in step SA7, the control section 100 rotates the twist motor 51 in the forward direction by a predetermined amount. From the state in which the movable knife 81 is in the standby position, the twist motor 51 is rotated in the forward direction by the predetermined amount, and as shown in FIG. 11, the movable knife 81 rotates in the cutting direction indicated by the arrow F by the predetermined amount. As a result, the movable knife 81 and the drive member 82 move in a direction away from the rear end portion WE of the binding wire W, and thus the binding wire W pinched between the drive member 82 and the movable knife 81 is released. Also, in step SA8, the control section 100 reverses the twist motor 51 by the predetermined amount required for the operation of moving the advance and retreat cylinder section 54 and the movable knife 81 to the standby position, and in step SA9, the control section 100 stops the twist motor 51. As a result, as shown in FIG. 12, the movable knife 81 rotates in the direction of retreat indicated by the arrow R, and when moved to the standby position, it is possible to suppress the situation in which the binding wire W is pinched between the movable knife 81 and the drive member 82. Figure 16D ​

[0255] ​​​​​Therefore, the condition that the bundled wire W after bundling is difficult to be separated can be suppressed, and the work efficiency is improved. Moreover, even if the cutting portion and the guide portion are of the conventional structure, the condition that the bundled wire W is clamped can be suppressed only by the control of the movable cutter.

Claims

1. A strapping machine, comprising: a strapping wire conveying section that conveys a strapping wire; a cutting section that is provided on a downstream side of the strapping wire conveying section in a conveying direction of the strapping wire conveyed by the strapping wire conveying section, cuts the strapping wire, and a guide section that is provided on a downstream side of the cutting section in the conveying direction of the strapping wire, crimps the strapping wire by restricting a traveling direction of the strapping wire, the cutting section including: a fixed blade that forms a first strapping wire passage through which the strapping wire passes; a movable blade that forms a second strapping wire passage through which the strapping wire passes, slides on an outer peripheral surface of the fixed blade, and cuts the strapping wire; and a driving member that is coupled to the movable blade and drives the movable blade, the movable blade being movable between a standby position at which the first strapping wire passage and the second strapping wire passage are communicated and a movement end position at which the first strapping wire passage and the second strapping wire passage are not communicated, and an end portion of the movable blade opposite to an end portion of the guide section in a state where the movable blade is moved to the movement end position having a protruding portion that protrudes from an outer surface of the movable blade toward the guide section, the cutting section suppressing a change in a behavior of the strapping wire between the protruding portion and the guide section when the movable blade is moved to the movement end position.

2. The strapping machine according to claim 1, wherein the guide section includes a first abutting section that is provided between the strapping wire conveying section and the cutting section, is provided on a first side of a conveying path of the strapping wire, and is capable of abutting the strapping wire from the first side, and a second abutting section that is provided on a downstream side of the cutting section, is provided on a second side opposite to the first side with respect to the conveying path of the strapping wire, and is capable of abutting the strapping wire from the second side, and the guide section crimps the strapping wire by restricting the traveling direction of the strapping wire by the second abutting section abutting the strapping wire in a state where the first abutting section abuts the strapping wire, the second strapping wire passage includes a guide portion that guides the cut strapping wire by an action of the movable blade moving from the movement end position to the standby position, the guide portion is located on the second side, protrudes from the second side toward the guide section when the movable blade is moved to the standby position, and blocks between the movable blade and the guide section in a manner that the strapping wire cannot pass through.

3. The strapping machine according to claim 1, wherein the guide section includes a first abutting section that is provided between the strapping wire conveying section and the cutting section, is provided on a first side of a conveying path of the strapping wire, and is capable of abutting the strapping wire from the first side, and a second abutting section that is provided on a downstream side of the cutting section, is provided on a second side opposite to the first side with respect to the conveying path of the strapping wire, and is capable of abutting the strapping wire from the second side, and the guide section crimps the strapping wire by restricting the traveling direction of the strapping wire by the second abutting section abutting the strapping wire in a state where the first abutting section abuts the strapping wire. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second binding wire passage has a guide portion on the second side that guides the cut binding wire by movement of the movable cutter from the movement end position to the standby position, In the second binding wire passage, the opening on the side opposite the guide portion is widened toward the second side in the direction of movement of the movable cutter relative to the opening on the side opposite the fixed cutter.

4. The binding machine according to claim 1, wherein The cutting portion is configured such that, when the movable cutter moves to the standby position, the spacing between the movable cutter and the drive member is less than the diameter of the binding wire, The cutting portion has a suppression portion configured to, in a state in which the movable cutter moves to the standby position, cause the end portion of the passage forming member opposite the guide portion to retreat in a direction away from the guide portion.

5. The binding machine according to claim 1, wherein The guide portion has a binding wire sliding surface against which the binding wire abuts, and has a binding wire retreat portion at an end portion opposite the movable cutter, the binding wire retreat portion being composed of a surface that retreats in a direction in which the spacing between the movable cutter and the guide portion increases, An end portion of the binding wire retreat portion on a downstream side in the direction of conveyance of the binding wire is located at a position that is upstream in the direction of conveyance of the binding wire relative to a position at which the conveyance path of the binding wire before crimping is joined to the binding wire sliding surface.

6. The binding machine according to claim 5, wherein The binding wire retreat portion is composed of a surface that is inclined in a direction in which the spacing between the movable cutter and the guide portion increases.

7. The binding machine according to claim 1, wherein The guide portion has a binding wire sliding surface against which the binding wire abuts, and has a movable range suppression portion that extends the end portion opposite the movable cutter in the direction of the movable cutter to reduce the movable range of the binding wire between the guide portion and the cutting portion, The movable range suppression portion is composed of a surface that is inclined relative to the binding wire sliding surface in a direction in which the spacing between the movable cutter and the guide portion decreases.

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