Binding machine

Abstract

To provide a binding machine which prevents dust from entering a brake housing part.SOLUTION: A binding machine comprises a reel housing part 2A for housing a wire reel 20 so as to be rotatable, a reel brake 60 having an engaging part 62 for engaging with the wire reel 20 and braking the rotation of the wire reel 20, a brake housing part 12 for covering the periphery of the reel brake 60 except at least the engaging part 62, and a body part 10 in which a curl forming part 4A for curling the wire W is disposed in the front side and a reel housing part 2A is disposed in the rear side. The binding machine has the reel housing part 2A disposed in the rear side of the brake housing part 12, and has a first opening part 14A in communication with the reel housing part 2A in the rear side of the brake housing part 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a binding machine that binds objects such as reinforcing bars with wire. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been proposed a binding machine called a reinforcing bar binding machine, which binds a plurality of reinforcing bars together by winding a wire around the reinforcing bars and twisting the wire.

[0003] Conventionally, in this type of rebar tying machine, the wire wound on the wire reel is fed toward the tip of the binding machine body by a feeding mechanism consisting of a pair of feed gears, etc., and the fed wire is curled by a curl guide provided at the tip of the binding machine body. At this time, the wire is curled so as to surround the rebar. When the wire has been fed a predetermined length, the wire feed stops, and then the wire is twisted by the twisting mechanism. When the wire has been fed a predetermined length, the wire feed stops, but the wire reel continues to rotate due to inertia even after the wire feed has stopped. For this reason, the rebar tying machine is provided with a brake mechanism to stop the rotation of the wire reel.

[0004] The brake mechanism is composed of a stopper lever that engages with the wire reel to stop the rotation of the wire reel, a drive means such as a solenoid that drives the stopper lever, and a shaft that connects the stopper lever and the drive means, etc. In conventional rebar binding machines, the stopper lever, shaft, etc. (hereinafter simply referred to as "stopper lever, etc.") of the brake mechanism are provided so as to be exposed inside the reel housing section that houses the wire reel (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-144357 A Summary of the Invention [Problem to be solved by the invention]

[0006] In a configuration in which the stopper lever, etc. are exposed in the reel housing, rainwater, etc. easily adheres to the stopper lever, etc., causing rust and malfunction. Therefore, in order to prevent rainwater, etc. from adhering to the stopper lever, etc., it is conceivable to provide a brake housing portion composed of a wall portion that covers the periphery of the stopper lever, etc. However, providing the brake housing portion may cause debris such as wire reel pieces to accumulate inside the brake housing portion, which may adversely affect the brake operation.

[0007] The present disclosure has been made to solve such problems, and aims to provide a binding machine that can discharge to the outside any debris that has entered into a brake accommodating portion when a brake accommodating portion is provided that covers the periphery of the stopper lever, etc., or a binding machine that prevents debris from entering into a brake accommodating portion even when a brake accommodating portion is provided that covers the periphery of the stopper lever, etc. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a binding machine comprising a reel accommodating section that rotatably accommodates a wire reel, a reel brake having an engagement section that engages with the wire reel and brakes the rotation of the wire reel, a brake accommodating section that covers the periphery of the reel brake except for at least the engagement section, and a main body section having a curl forming section that curls the wire at a front and the reel accommodating section at a rear, the reel accommodating section being provided rear of the brake accommodating section, and a first opening communicating with the reel accommodating section being provided rear of the brake accommodating section.

[0009] In the present invention, foreign matter, etc., generated when the engaging portion of the reel brake engages with the rotating wire reel, is prevented from entering the brake accommodating portion through the first opening. Effect of the Invention

[0010] In the present invention, since it is possible to prevent foreign matter from entering the brake accommodating portion through the first opening, it is possible to ensure the operability of the reel brake. [Brief description of the drawings]

[0011] [Figure 1] 1 is an overall configuration diagram showing an example of a reinforcing bar binding machine according to an embodiment of the present invention, viewed from one side. FIG. [Diagram 2] FIG. 2 is an overall configuration diagram showing an example of a reinforcing bar binding machine according to the present embodiment, as viewed from another side. [Diagram 3] 1 is a diagram showing a main configuration of an example of a reinforcing bar binding machine according to an embodiment of the present invention, viewed from above. FIG. [Figure 4] FIG. 2 is a perspective view showing a main part of an example of a brake housing portion. [Diagram 5] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 6A] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 6B] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 7A] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 7B] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 8A] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 8B] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 9] FIG. 2 is a diagram showing an example of a brake accommodating portion of the first embodiment provided in the reinforcing bar binding machine of the present embodiment. [Figure 10] FIG. 1 is a diagram showing a conventional braking section. [Figure 11] FIG. 1 is a diagram showing a conventional braking section. [Figure 12] FIG. 1 is a diagram showing a conventional braking section. [Figure 13] 13 is a diagram showing an example of a brake accommodating portion of a second embodiment provided in the reinforcing bar binding machine of the present embodiment. FIG. [Figure 14] 13 is a diagram showing an example of a brake accommodating portion of a second embodiment provided in the reinforcing bar binding machine of the present embodiment. FIG. [Figure 15] 13 is a diagram showing an example of a brake accommodating portion of a second embodiment provided in the reinforcing bar binding machine of the present embodiment. FIG. [Figure 16] 13 is a diagram showing an example of a brake accommodating portion of a second embodiment provided in the reinforcing bar binding machine of the present embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an example of a reinforcing bar binding machine as an embodiment of the binding machine of the present invention will be described with reference to the drawings.

[0013] <Configuration example of the reinforcing bar binding machine according to this embodiment> FIG. 1 is an overall configuration diagram of an example of a reinforcing bar tying machine of this embodiment, seen from one side; FIG. 2 is an overall configuration diagram of an example of a reinforcing bar tying machine of this embodiment, seen from another side; and FIG. 3 is a configuration diagram of the main parts, seen from above, showing an example of a reinforcing bar tying machine of this embodiment.

[0014] The reinforcing bar binding machine 1A includes a main body 10, a reel housing 2A formed in the main body 10 and rotatably housing a wire reel 20 around which one or more wires are wound, and a wire feeder 3A for feeding the wire W wound around the wire reel 20 housed in the reel housing 2A. The reinforcing bar binding machine 1A also includes a curl forming section 4A for curling the wire W fed by the wire feeder 3A and winding it around the reinforcing bar S, a binding section 5A for twisting the wire W wound around the reinforcing bar S, and a braking section 6A for braking the rotating wire reel 20 and restricting the rotation of the wire reel 20. The reinforcing bar binding machine 1A includes a handle section 10a protruding from the main body 10, and a trigger switch 10t is provided on the handle section 10a. In the following description, the side of the main body 10 of the reinforcing bar binding machine 1A on which the handle section 10a is provided is referred to as the bottom, and the side opposite the handle section 10a is referred to as the top. In addition, the side where the curl forming section 4A is provided is defined as the front, and the side where the reel accommodating section 2A is provided is defined as the rear.

[0015] First, the wire reel 20 used in the rebar binding machine 1A will be described with reference to Figures 1 and 3. The wire reel 20 comprises a cylindrical hub portion 20a around which the wire W is wound, and a pair of flange portions 20b provided on both axial ends of the hub portion 20a. The flange portions 20b have a diameter larger than that of the hub portion 20a, and protrude radially from both axial ends of the hub portion 20a.

[0016] On the outer periphery of one flange portion 20b, a plurality of engaged portions 20c and protruding portions 20d are alternately formed in a generally sawtooth shape along the circumferential direction. The wire reel 20 is designed to be stopped from rotating by engaging the engaged portions 20c with the reel brake 60 of the braking portion 6A shown in FIG. 1 and the like. The engaged portions 20c and the protruding portions 20d may have any shape that allows the reel brake 60 to engage therewith, such as a concave-convex shape, and are not necessarily limited to a sawtooth shape. The wire reel 20 also has holes 20e on both sides along the axial direction of the hub portion 20a.

[0017] Next, a description will be given of the reel housing section 2A that houses the wire reel 20. The reel housing section 2A has a recess 22 formed in the main body section 10. The recess 22 forms a space large enough to accommodate all or part of the wire reel 20, or a chamber with the periphery of this space partially or completely covered.

[0018] The reel accommodating section 2A includes a first support shaft 23 that protrudes from the side wall surface of the recess 22 and rotatably supports the wire reel 20, and a second support shaft 24 that is disposed opposite the first support shaft 23 and rotatably supports the wire reel 20. The first support shaft 23 and the second support shaft 24 fit into a hole 20e of the wire reel 20, and rotatably support the wire reel 20.

[0019] One or both of the first support shaft 23 and the second support shaft 24 are configured to be retracted from within the reel housing 2A so that the wire reel 20 can be attached and detached from the reel housing 2A. In this example, the second support shaft 24 is configured to be retractable from within the reel housing 2A.

[0020] Next, a description will be given of the wire feeding section 3A which feeds the wire W. The wire feeding section 3A includes a pair of feed gears 30L, 30R. The pair of feed gears 30L, 30R are disposed on either side of the feed path of the wire W, as shown in FIG.

[0021] In this example, the feed gears 30L, 30R are spur gears with teeth formed on their outer circumferential surfaces, and have grooves formed along the circumferential direction into which the wire W is inserted. With the wire W inserted in the grooves, the feed gears 30L, 30R are configured such that the wire W is sandwiched between the feed gears 30L and 30R and the teeth of the feed gears 30L, 30R mesh with each other.

[0022] The wire feed unit 3A includes a feed motor 31 that drives the feed gear 30L, and a gear 32 that transmits the rotation of the feed motor 31 to the feed gear 30L. When the rotation of the feed motor 31 is transmitted to the feed gear 30L via the gear 32, the feed gear 30R rotates in response to the feed gear 30L.

[0023] The wire feed unit 3A feeds the wire W toward the curl forming unit 4A by rotating the feed gears 30L and 30R while the wire W is sandwiched between the feed gears 30L and 30R.

[0024] Next, the curl forming unit 4A that winds the wire W around the reinforcing bar S will be described. The curl forming unit 4A comes into contact with the wire W fed by the wire feeding unit 3A and regulates the traveling direction of the wire W. By regulating the traveling direction of the wire W, the curl forming unit 4A imparts a curling tendency to the wire W so that the wire W draws a substantial circle around the reinforcing bar S (curls the wire W).

[0025] Next, a description will be given of the binding unit 5A that binds the reinforcing bars S by twisting the wire W. The binding unit 5A includes a torsion motor 51, a gear 52, a screw shaft portion 53, a forward / backward moving cylinder portion 54, and a torsion hook 55. The torsion motor 51, which is driven separately from the feed motor 31, is used as the drive source of the binding unit 5A.

[0026] The screw shaft portion 53 has a thread formed on its outer circumferential surface, and is rotated by the driving force of the torsion motor 51 transmitted via the gear 52. The advance / retract cylinder portion 54 has a thread formed on its inner circumferential surface, and is screwed into the thread on the outer circumferential surface of the screw shaft portion 53.

[0027] With its rotation restricted, the advance / retract cylinder portion 54 moves back and forth as the screw shaft portion 53 rotates due to the rotation of the torsion motor 51. The advance / retract cylinder portion 54 is coupled to the screw shaft portion 53 so as to rotate integrally with the screw shaft portion 53, and is configured to rotate due to the rotation of the screw shaft portion 53 caused by the rotation of the torsion motor 51.

[0028] The twisting hooks 55 are a pair of claw-shaped members attached to the tip of the advancing / retreating cylinder portion 54. The twisting hooks 55 are configured to open and close in accordance with the advancing and retracting movement of the advancing / retreating cylinder portion 54 by a known structure.

[0029] Next, a description will be given of the braking unit 6A that stops the rotation of the wire reel 20. The braking unit 6A includes a reel brake 60 that can engage with the wire reel 20, a solenoid 61 that drives the reel brake 60, and a shaft 63 that connects the reel brake 60 and the solenoid 61. The solenoid 61 is connected to the shaft 63 via a link 64. The reel brake 60 includes an engagement portion 62 at one end that engages with the engaged portion 20c of the wire reel 20, and a connecting portion at the other end for connecting to the shaft 63.

[0030] The solenoid 61 has a solenoid body and an iron core. The iron core is pulled in or pushed out relative to the solenoid body when electricity is applied. When the iron core moves due to the application of electricity, the shaft 63 rotates via the link 64, and the rotation of the shaft 63 rotates the reel brake 60 in the same direction as the rotation of the shaft 63.

[0031] The reel brake 60 has a generally L-shape when viewed from the side of the main body 10, and includes a reel brake main body extending downward from the connecting portion by a predetermined length, and an extension formed so as to bend from the reel brake main body toward the reel housing 2A. The engagement portion 62 is formed on the extension, includes at least a portion that engages with the engaged portion 20c of the wire reel 20, and is formed on the one end side of the reel brake 60. The engagement portion 62 moves by rotation about an axis 63 as a fulcrum between a braking position, which is a first position where the engagement portion 62 engages with the engaged portion 20c of the wire reel 20, and a retracted position, which is a second position where the engagement portion 62 is disengaged from the engaged portion 20c of the wire reel 20.

[0032] The wire reel 20 rotates in response to the feeding of the wire W by the wire feed section 3A, but even after the wire feed section 3A stops feeding the wire W, the wire reel 20 tends to continue rotating due to inertia.

[0033] Therefore, in conjunction with the wire feed unit 3A stopping the feed of the wire W, the brake unit 6A is operated to stop the rotation of the wire reel 20. Specifically, in conjunction with the wire feed unit 3A stopping the feed of the wire W, the solenoid 61 is energized to operate (rotate) the reel brake 60 and move the engaging unit 62 from the retracted position to the braking position. As a result, the engaging unit 62 engages with the engaged unit 20c of the wire reel 20, and the rotation of the wire reel 20 is stopped.

[0034] 4 is a perspective view of a main part showing an example of a brake housing. The brake housing 12 is provided adjacent to the reel housing 2A. The brake housing 12 is composed of a wall 13 that covers the periphery of the reel brake 60 except for the portion facing the tip of the engagement portion 62 of the reel brake 60. This includes not only the case where the entire reel brake 60 is covered except for the portion facing the tip of the engagement portion 62, but also the case where only a portion is covered. It is necessary to cover at least the periphery of the connection portion between the reel brake 60 and the shaft 63.

[0035] The brake accommodating section 12 has a first opening 14A that exposes the engaging section 62 of the reel brake 60 and through which the engaging section 62 can protrude towards the reel accommodating section 2A side or retract into the brake accommodating section 12. The first opening 14A is configured by providing a hole of a predetermined shape that penetrates the wall section 13 in accordance with the trajectory of the engaging section 62 that moves with the rotational movement of the reel brake 60 about an axis 63 as a fulcrum.

[0036] When the engaging portion 62 moves to the braking position, it protrudes from the first opening 14A into the reel housing 2A to a position where it engages with the engaged portion 20c of the wire reel 20. When the engaging portion 62 moves to the retracted position, it retracts from the first opening 14A into the brake housing 12. When the engaging portion 62 moves to the retracted position, it may protrude from the first opening 14A into the reel housing 2A to a position where it is separated from the engaged portion 20c of the wire reel 20 and disengaged. Thus, the first opening 14A that exposes the engaging portion 62 of the reel brake 60 includes not only a state where the engaging portion 62 moves to the retracted position and retracts from the first opening 14A into the brake housing 12, but also a state where the engaging portion 62 protrudes from the first opening 14A into the reel housing 2A to a position where it is separated from the engaged portion 20c of the wire reel 20 and disengaged.

[0037] <Example of operation of the reinforcing bar binding machine according to the present embodiment> Next, an operation of binding a reinforcing bar S using a wire W with the reinforcing bar binding machine 1A of this embodiment will be described with reference to each drawing.

[0038] When the trigger switch 10t is operated, the feed motor 31 is driven and the wire W is fed by a predetermined amount by the wire feed unit 3A. The wire W fed by the wire feed unit 3A is wound around the reinforcing bar S by the curl forming unit 4A. The number of times the wire W is wound around the reinforcing bar S is set depending on the amount of wire W fed. The wire reel 20 rotates following the feeding of the wire W as the wire W is fed by the wire feed unit 3A. When the wire W is fed by a predetermined amount, the wire feed unit 3A ends the feeding operation of the wire W, but the wire reel 20 tries to continue rotating due to inertia, so the rotation of the wire reel is braked by the brake unit 6A. By stopping the feed motor 31, after the feeding operation of the wire W by the wire feed unit 3A is finished, the wire reel 20 that has been rotating following the feeding of the wire W is braked by the brake unit 6A, and the rotation of the wire reel 20 is restricted.

[0039] In the binding section 5A, the torsion motor 51 rotates in the forward direction, and the rotation of the torsion motor 51 is transmitted to the threaded shaft section 53 via the gear 52. At this time, the threaded shaft section 53 rotates, but the rotation of the advance / retract cylinder section 54 is restricted, so that the advance / retract cylinder section 54 is sent forward by the action of the engaged screw. As the advance / retract cylinder section 54 is sent forward, the twisting hook 55 advances to a position where it contacts the wire W. The twisting hook 55 operates in a closing direction in conjunction with the advancement of the advance / retract cylinder section 54, and grips a part of the wire wound in a loop.

[0040] The advance / retract cylinder portion 54 is released from the restriction on rotation at a predetermined forward position and rotates together with the screw shaft portion 53. The wire W is twisted by the rotation of the twisting hook 55 holding the wire W. Note that, while the advance / retract cylinder portion 54 is moving forward, a cutter (not shown) is actuated to cut the wire W.

[0041] When the twisting operation is completed, the twisting motor 51 rotates in the reverse direction, and the screw shaft portion 53 rotates in the reverse direction. As a result, the advancing and retreating cylinder portion 54 and the twisting hook 55 also move backward, and the twisting hook 55 opens and releases the wire W. The twisting motor 51 rotates in the reverse direction until the advancing and retreating cylinder portion 54 and the twisting hook 55 move to the standby position. When the advancing and retreating cylinder portion 54 and the twisting hook 55 move to the standby position, the twisting motor 51 stops and a series of operations is completed. As a result, the reinforcing bar S is bound by the wire W.

[0042] <An example of the brake housing portion according to the first embodiment> 5, 6A, 6B, 7A, 7B, 8A, 8B, and 9 are diagrams showing an example of the brake accommodating portion of the first embodiment provided in the rebar binding machine of the present embodiment. In the brake accommodating portion 12 (12A1-12A5) of each example of the first embodiment, a foreign object Du that has entered the brake accommodating portion 12 (12A1-12A5) from the first opening 14A is removed from the second opening (68A1-68A5).

[0043] 5, the brake accommodating portion 12A1 in the first example of the first embodiment includes a second opening 68A1 that communicates between the inside of the brake accommodating portion 12A1 and the outside of the brake accommodating portion 12A1 excluding the reel accommodating portion 2A. The second opening 68A1 is configured by providing an opening large enough to discharge foreign matter Du. The second opening 68A1 is provided in a lower portion of the brake accommodating portion 12 in the same direction as the direction in which the handle portion 10a protrudes from the main body portion 10.

[0044] In the reinforcing bar binding machine 1A, when the engaging portion 62 of the reel brake 60 engages with the engaged portion 20c of the rotating wire reel 20, the reel brake 60 may scrape the wire reel 20, or the reel brake 60 may scrape the wire reel 20. If the wire reel 20 or the reel brake 60 is scraped, it may become a foreign object and remain in the reel housing 2A. In addition, if the wire W is coated, the coating may peel off and become a foreign object, or if the surface of the wire W is oxidized, the oxide may peel off and become a foreign object. As the wire reel 20 rotates, the wire reel 20 may be scraped by the first support shaft 23 and the second support shaft 24 shown in FIG. 3 and become a foreign object. Furthermore, when the wire reel 20 is attached to or detached from the reel housing 2A, foreign objects may enter the reel housing 2A from the outside.

[0045] 10 to 12 are diagrams showing a conventional braking section. In the conventional braking section 601 shown in Fig. 10, the reel brake 60 is exposed to the reel housing section 2A. With such a configuration, moisture from rainwater or the like may get into the portion supporting the shaft 63, causing rust on the metal parts, which may cause the reel brake 60 to malfunction.

[0046] To solve this problem, it is conceivable to cover the reel brake 60 with a brake housing portion 120 as shown in Fig. 11. However, with this configuration, a new problem arises in that foreign matter Du that has entered the brake housing portion 120 from the opening 140 may accumulate inside the brake housing portion 120, causing the reel brake 60 to malfunction, as shown in Fig. 12.

[0047] Therefore, the brake accommodating section 12A1 in the first example of the first embodiment is provided with a second opening 68A1 that communicates between the inside and outside of the brake accommodating section 12A1. This allows foreign matter Du that is generated in the reel accommodating section 2A and enters the brake accommodating section 12A1 from the first opening 14A, or foreign matter Du that enters the reel accommodating section 2A from the outside and enters the brake accommodating section 12A1 from the first opening 14A, to be discharged to the outside of the brake accommodating section 12A1 from the second opening 68A1. As a result, accumulation of foreign matter Du and the like inside the brake accommodating section 12A1 is suppressed, and malfunction of the reel brake 60 can be suppressed.

[0048] In addition, the second opening 68A1 is provided at the bottom of the brake accommodating portion 12A1, in the same direction as the direction in which the handle portion 10a protrudes from the main body portion 10, so that when holding the handle portion 10a to perform the operation of binding the reinforcing bar S described above, the foreign object Du can be expelled by its own weight from the second opening 68A1 to the outside of the brake accommodating portion 12A1.

[0049] 6A and 6B, the brake accommodating portion 12A2 of the second example of the first embodiment includes a second opening 68A2 that communicates between the inside and outside of the brake accommodating portion 12A2. The second opening 68A2 is configured by providing an opening large enough to discharge the foreign object Du.

[0050] The lid portion 69A2 is provided on the reel brake 60, and is configured to close the second opening 68A2 by the extension portion when the reel brake 60 moves to the retracted position, which is the second position, as shown in Fig. 6A. The lid portion 69A2 has an outer shape that can block the second opening 68A2 when in the position that closes the second opening 68A2. When the reel brake 60 moves to the braking position, which is the first position, the lid portion 69A2 retracts from the second opening 68A2 as shown in Fig. 6B.

[0051] As shown in Fig. 6A, when the reel brake 60 moves to the retracted position, the engaging portion 62 of the braking portion 6A retracts into the first opening 14A. Also, as shown in Fig. 6B, when the reel brake 60 moves to the braking position, the engaging portion 62 protrudes from the first opening 14A into the reel accommodating portion 2A and engages with the engaged portion 20c of the wire reel 20.

[0052] In the brake accommodating portion 12A2 of the second example of the first embodiment, a second opening 68A2 is provided that connects the inside and outside of the brake accommodating portion 12A2, and the reel brake 60 is provided with a lid portion 69A2 that opens and closes the second opening 68A2.As a result, foreign matter Du, moisture, etc. that has entered the brake accommodating portion 12A2 from the first opening 14A can be discharged to the outside of the brake accommodating portion 12A2 when the reel brake 60 moves to the braking position and the lid portion 69A2 opens, as shown in Figure 6B.

[0053] This prevents foreign matter Du and the like from accumulating inside the brake accommodating portion 12A2, and prevents malfunction of the reel brake 60. In addition, the second opening 68A2 can be opened and closed by the operation of the reel brake 60, so that foreign matter can be discharged after each bundling operation, and the accumulation of foreign matter in the brake accommodating portion 12A2 can be prevented. The worker may place the main body 10 with its upper surface facing down on the ground or the like. Therefore, if the second opening 68A2 is provided below the main body 10, dust and rainwater are likely to enter through the second opening 68A2. Therefore, by providing the cover portion 69A2, it is possible to prevent dust, rainwater, and the like from entering the inside of the brake accommodating portion 12A.

[0054] 7A and 7B, the brake accommodating portion 12A3 of the third example of the first embodiment includes a second opening 68A3 that communicates between the inside and outside of the brake accommodating portion 12A3. The second opening 68A3 is configured by providing an opening large enough to discharge the foreign object Du. The brake accommodating portion 12A3 includes a lid portion 69A3 that opens and closes the second opening 68A3.

[0055] As shown in FIG. 7A, when the lid portion 69A3 is in a position to close the second opening 68A3, it has an external shape that is capable of blocking the second opening 68A3, and as shown in FIG. 7B, it is configured by providing a member that is movable or detachable relative to the main body portion 10 as indicated by the arrow Re to a position where it is retracted from the second opening 68A3.

[0056] In the brake accommodating section 12A3 of the third example of the first embodiment, a second opening 68A3 that communicates between the inside and outside of the brake accommodating section 12A3 and a lid portion 69A3 that opens and closes the second opening 68A3 are provided, so that foreign matter Du, moisture, etc. that has entered the brake accommodating section 12A3 from the first opening 14A can be discharged to the outside of the brake accommodating section 12A3 from the second opening 68A3 by opening the lid portion 69A3 as necessary as shown in FIG. 7B. This prevents foreign matter Du, etc. from accumulating inside the brake accommodating section 12, and prevents malfunction of the reel brake 60. An operator may place the main body section 10 with the top surface facing down on the ground, etc. Therefore, if the second opening 68A3 is provided below the main body section 10, dust and rainwater are likely to enter through the second opening 68A3. Therefore, by providing the lid portion 69A3, it is possible to prevent dust, rainwater, etc. from entering the inside of the brake accommodating section 12A.

[0057] 8A and 8B, the brake accommodating portion 12A4 of the fourth example of the first embodiment includes a second opening 68A4 that communicates between the inside and outside of the brake accommodating portion 12A4. The second opening 68A4 is configured by providing an opening large enough to discharge the foreign object Du. The brake accommodating portion 12A4 includes a storage portion 69A4 that opens and closes the second opening 68A4.

[0058] The storage portion 69A4 is an example of a concavely formed lid portion capable of accommodating foreign matter Du, and as shown in FIG. 8A, when in the position for closing the second opening 68A4, it has an external shape capable of blocking the second opening 68A4, and as shown in FIG. 8B, it is configured by providing a member that is detachable from the second opening 68A4.

[0059] In the brake accommodating portion 12A4 of the fourth example of the first embodiment, a second opening 68A4 that connects the inside and outside of the brake accommodating portion 12A4 and a storage portion 69A4 that is detachable from the second opening 68A4 are provided, so that foreign matter Du, moisture, etc. that have entered the brake accommodating portion 12A4 from the first opening 14A can be stored in the storage portion 69A4 as shown in Figure 8A, and can be discharged by removing the storage portion 69A4 as necessary as shown in Figure 8B.

[0060] This prevents foreign matter Du and the like from accumulating inside the brake accommodating portion 12A4, thereby preventing malfunction of the reel brake 60. Furthermore, foreign matter can be stored in the storage portion 69A4 and then discharged to the outside of the brake accommodating portion 12A4 by removing the storage portion 69A4 from the second opening 68A4, so that foreign matter can be easily discharged to the outside.

[0061] As shown in FIG. 9, a brake accommodating portion 12A5 in the fifth example of the first embodiment includes a second opening 68A5 that communicates between the inside and the outside of the brake accommodating portion 12A5.

[0062] The second opening 68A5 is configured by providing an opening of a size that allows foreign matter Du to be discharged. The main body 10 is provided with a fan 70 at a position adjacent to the brake accommodating portion 12A5. In this example, the fan 70 is driven by the feed motor 31. The brake accommodating portion 12A5 is provided with an air inlet 69A5 communicating with the fan 70, and an air path is formed that runs from the inlet 69A5 through the brake accommodating portion 12A5 to the second opening 68A5.

[0063] In the brake accommodating portion 12A5 of the fifth example of the first embodiment, when the fan 70 rotates during the operation of feeding the wire W, a flow of air is generated that is blown out from the second opening 68A5, and the foreign matter Du, moisture, etc. that have entered the brake accommodating portion 12A5 from the first opening 14A can be expelled from the brake accommodating portion 12A5 to the outside of the brake accommodating portion 12A5 through the second opening 68A5 by the air flow.

[0064] This prevents foreign matter Du and the like from accumulating inside the brake accommodating portion 12A5, and prevents malfunction of the reel brake 60. In this example, the fan 70 is provided adjacent to the brake accommodating portion 12A5, but the fan 70 may be provided inside the brake accommodating portion 12A5. In this case, an air passage is formed that connects the brake accommodating portion 12A5 to the second opening 68A5 without passing through the inlet 69A5. In this example, the fan 70 is driven by the feed motor 31, but a dedicated motor for driving the fan 70 may be provided.

[0065] <An example of the brake accommodating portion according to the second embodiment> 13 to 16 are configuration diagrams showing an example of a brake accommodating section of the second embodiment provided in the rebar binding machine of this embodiment. In the brake accommodating section 12 (12B1 to 12B4) of each example of the second embodiment, a foreign object Du is prevented from entering the brake accommodating section 12 through a third opening 14B that communicates between the reel accommodating section 2A and the brake accommodating section 12 (12B1 to 12B4).

[0066] 13, the brake accommodating portion 12B1 of the first example of the second embodiment is provided with a sealing member 66B1 at the third opening 14B provided in the movement path of the engaging portion 62. The sealing member 66B1 is an example of a shielding portion, and is made of a member that can expand and contract due to elastic deformation such as rubber, a member that can expand and contract with a bellows structure or the like, a member that has sufficient deflection with respect to the amount of movement of the reel brake 60 and can expand and contract by the amount of deflection, or the like, and has an outer shape that closes the third opening 14B.

[0067] When the reel brake 60 moves to the braking position, the sealing member 66B1 of the braking portion 6A is pressed by the engaging portion 62 and elastically deforms, and the sealing member 66B1 and the engaging portion 62 protrude into the reel accommodating portion 2A and engage with the engaged portion 20c of the wire reel 20. When the reel brake 60 moves to the retracted position, the engaging portion 62 retracts from the third opening 14B into the brake accommodating portion 12B1, and the sealing member 66B1 returns to its original shape.

[0068] In the brake accommodating portion 12B1 of the first example of the second embodiment, by providing the sealing member 66B1 in a shape that blocks the third opening 14B, the third opening 14B can be constantly blocked, and foreign matter Du generated in the reel accommodating portion 2A, foreign matter Du that has entered the reel accommodating portion 2A from the outside, moisture, etc. can be prevented from entering the brake accommodating portion 12B1 through the third opening 14B. This can prevent malfunctions of the reel brake 60. In addition, since the sealing member 66B1 is made of an expandable member and has a shape, the sealing member 66B1 is prevented from interfering with the operation of the reel brake 60.

[0069] As shown in Fig. 14, the brake accommodating section 12B2 of the second example of the second embodiment includes a sealing member 66B2 between the third opening 14B and the engaging section 62 of the reel brake 60. The sealing member 66B2 is an example of a shielding section, and is made of an elastic body such as rubber. It has an outer shape that blocks the third opening 14B, and includes a sealing opening 67B2 through which the engaging section 62 of the reel brake 60 passes. The sealing opening 67B2 is an opening of a size that allows the engaging section 62 of the reel brake 60 to come into contact with the sealing opening 67B2, or an opening of a size that forms a gap between the sealing opening 67B2 and the engaging section 62 of the reel brake 60 to prevent the intrusion of a foreign object Du, and is provided in accordance with the trajectory of the engaging section 62 that moves with the rotation of the reel brake 60 around the shaft 63 as a fulcrum.

[0070] When the reel brake 60 moves to the braking position, the engaging portion 62 of the braking portion 6A protrudes from the sealing opening 67B2 of the sealing member 66B2 into the reel accommodating portion 2A and engages with the engaged portion 20c of the wire reel 20. When the reel brake 60 moves to the retracted position, the engaging portion 62 retracts from the third opening 14B into the brake accommodating portion 12B2.

[0071] In the brake accommodating portion 12B2 of the second example of the second embodiment, a sealing member 66B2 is provided in a shape that blocks the gap between the third opening 14B and the engaging portion 62 of the reel brake 60, thereby preventing foreign matter Du, moisture, and the like from entering the brake accommodating portion 12B2 from the third opening 14B. This prevents malfunction of the reel brake 60. In addition, by providing the sealing member 66B2 with a sealing opening 67B2 through which the engaging portion 62 passes, the sealing member 66B2 is prevented from interfering with the operation of the reel brake 60.

[0072] In addition, since the sealing member 66B2 is made of an elastic material, the sealing member 66B2 and the engaging portion 62 may be integrated when the sealing opening 67B2 and the engaging portion 62 are in contact with each other, or the sealing member 66B2 and the engaging portion 62 may be integrated by adhesion or the like, and the sealing member 66B2 may be configured to elastically deform when the reel brake 60 is operated.

[0073] As shown in FIG. 15, the brake accommodating section 12B3 of the third example of the second embodiment includes a sealing member 66B3 that closes the third opening 14B in the reel brake 60. The sealing member 66B3 is an example of a shielding section, and is made of an elastic body such as rubber, and has an outer shape that closes the third opening 14B. The engagement portion 62 is provided on the sealing member 66B3 separately from the reel brake 60. Alternatively, the engagement portion 62 provided on the reel brake 60 may be configured to protrude from the sealing member 66B3. The sealing member 66B3 is sized to be in contact with the inner circumferential surface of the third opening 14B, or to have a gap between the sealing member 66B3 and the inner circumferential surface of the third opening 14B that is large enough to prevent the intrusion of a foreign object Du, and closes the third opening 14B in a predetermined sealing state that can prevent the intrusion of the foreign object Du. Also, a sliding sealing member 67B3 that contacts the outer circumferential surface of the sealing member 66B3 may be provided on the inner circumferential surface of the third opening 14B. The sealing member 66B3 is configured to be movable relative to the third opening 14B along the movement direction of the reel brake 60 that causes the engagement portion 62 to protrude from the third opening 14B.

[0074] When the reel brake 60 moves to the braking position, the sealing member 66B3 of the braking portion 6A is pressed by the reel brake 60, causing the engaging portion 62 to protrude into the reel accommodating portion 2A and engage with the engaged portion 20c of the wire reel 20. When the reel brake 60 moves to the retracted position, the sealing member 66B3 returns into the third opening 14B, and the engaging portion 62 retracts from the third opening 14B into the brake accommodating portion 12B3.

[0075] In the brake accommodating portion 12B3 of the third example of the second embodiment, by providing the reel brake 60 with a sealing member 66B3 shaped to close the third opening 14B, it is possible to prevent foreign matter Du, moisture, etc. from entering the brake accommodating portion 12B3 from the third opening 14B. This makes it possible to prevent malfunctions of the reel brake 60. Furthermore, by providing the sealing member 66B3 in the reel brake 60, it is possible to prevent the sealing member 66B3 from interfering with the operation of the reel brake 60.

[0076] As shown in FIG. 16, the brake accommodating portion 12B4 of the fourth example of the second embodiment includes a third opening 14B. The reel brake 60 includes a sealing portion 66B4 that closes the third opening 14B. The sealing portion 66B4 is an example of a shielding portion, and has an outer shape that matches the shape of the third opening 14B. The third opening 14B includes an abutting portion 67B4 against which the sealing portion 66B4 abuts. The abutting portion 67B4 protrudes from the inner circumferential surface of the third opening 14B. When the sealing portion 66B4 abuts against the abutting portion 67B4, the third opening 14B is closed in a predetermined sealed state that can prevent the intrusion of a possible foreign object Du. The sealing portion 66B4 is configured to be movable relative to the third opening 14B along the moving direction of the reel brake 60 that causes the engaging portion 62 to protrude from the third opening 14B. In the reel brake 60, the engaging portion 62 protrudes from the sealing portion 66B4.

[0077] When the reel brake 60 moves to the braking position, the engaging portion 62 of the braking portion 6A protrudes into the reel accommodating portion 2A with the third opening 14B sealed by the sealing portion 66B4, and engages with the engaged portion 20c of the wire reel 20. When the reel brake 60 moves to the retracted position, the sealing portion 66B4 abuts against the abutting portion 67B4, and the engaging portion 62 retracts from the third opening 14B into the brake accommodating portion 12B4 with the third opening 14B sealed by the sealing portion 66B4.

[0078] In the brake accommodating portion 12B4 of the fourth example of the second embodiment, the reel brake 60 is provided with a sealing portion 66B4 shaped to close the third opening 14B, thereby preventing foreign matter Du, moisture, and the like from entering the brake accommodating portion 12B4 through the third opening 14B. This prevents malfunctions of the reel brake 60. Furthermore, providing the reel brake 60 with the sealing portion 66B4 prevents the sealing portion 66B4 from interfering with the operation of the reel brake 60. [Explanation of symbols]

[0079] 1A rebar tying machine, 10 main body, 10a handle, 10b support shaft, 10t trigger switch, 12, 12A1, 12A2, 12A3, 12A4, 12A5, 12B1, 12B2, 12B3, 12B4 brake housing, 13 wall, 14A first opening, 14B third opening Opening, 2A... reel accommodating portion, 20... wire reel, 20a... hub portion, 20b... flange portion, 20c... engaged portion, 20d... protruding portion, 20e... hole portion, 23... first support shaft, 24... second support shaft, 3A... wire feed portion, 30L... feed gear, 30R... feed gear, 31... Feed motor, 32 gear, 4A curl forming section, 5A binding section, 51 twist motor, 52 gear, 53 screw shaft section, 54 forward / backward cylinder section, 55 twist hook, 6A braking section, 60 reel brake, 61 solenoid, 62 engagement section, 63 shaft, 64 Link, 66B1 to 66B4... sealing member (shielding portion), 67B2... sealing opening, 67B3... sliding sealing member, 68A1, 68A2, 68A3, 68A4, 68A5... second opening, 69A2, 69A3... lid portion, 69A4... storage portion (lid portion), 69A5... inlet, 70... fan, W... wire

Claims

1. a reel housing portion that rotatably houses a wire reel; a reel brake having an engagement portion that engages with the wire reel and brakes the rotation of the wire reel; a brake housing portion that covers the periphery of the reel brake except for at least the engagement portion; a main body having a curl forming section for curling the wire provided at a front portion thereof and the reel housing section provided at a rear portion thereof; The reel accommodating portion is provided behind the brake accommodating portion, and a first opening communicating with the reel accommodating portion is provided behind the brake accommodating portion. Binding machine.

2. The main body portion includes a handle portion that protrudes downward and has a second opening that opens downward to the brake accommodating portion. The strapping machine according to claim 1.

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