End 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] BACKGROUND ART Conventionally, a binding machine known as a reinforcing bar binding machine has been proposed, which binds a plurality of reinforcing bars together by winding a wire around the reinforcing bars and twisting the wire.

[0003] In conventional rebar tying machines of this type, a wire wound on a wire reel is fed toward the tip of the bundling 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 bundling machine body. At this time, the wire is curled so as to surround the rebar. When a predetermined length of wire has been fed, the wire feeding stops, and the wire is then twisted by a twisting mechanism. When the predetermined length of wire has been fed, the wire feeding stops, but the wire reel continues to rotate due to inertia even after the wire feeding has stopped. For this reason, rebar tying machines are 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. 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 storage section that stores the wire reel (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-144357 Summary of the Invention [Problem to be solved by the invention]

[0006] In a configuration in which the stopper lever and other components are exposed in the reel housing, rainwater and other elements easily adhere to the stopper lever and other components, causing rust and resulting in malfunctions. Therefore, in order to prevent rainwater and other elements from adhering to the stopper lever and other components, it is conceivable to provide a brake housing that is made up of a wall or other element that covers the periphery of the stopper lever and other components. However, providing a brake housing can cause debris, such as pieces of the wire reel, to accumulate inside the brake housing, which can adversely affect 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 the brake accommodating section when a brake accommodating section is provided that covers the periphery of the stopper lever, etc., or a binding machine that prevents debris from entering the brake accommodating section even when a brake accommodating section that covers the periphery of the stopper lever, etc. is provided. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a fishing tackle comprising: a reel accommodating section for rotatably accommodating a wire reel; a reel brake having an engaging 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 engaging section; and a main body having a curl forming section that curls the wire provided in the front and the reel accommodating section provided in the rear, the reel accommodating section being provided in the rear of the brake accommodating section, and a first opening portion that communicates with the reel accommodating section being provided in the rear of the brake accommodating section. The main body has a handle portion that protrudes downward and has a second opening that opens below the brake accommodating portion. It is a binding machine.

[0009] In the present invention, foreign matter and the like 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. [Effects of the Invention]

[0010] In this aspect of the invention, foreign matter can be prevented from entering the brake accommodating portion through the first opening, thereby ensuring the operability of the reel brake. [Brief explanation of the drawings]

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

[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, of an example of a reinforcing bar tying machine of this embodiment.

[0014] The rebar 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 feeding unit 3A that feeds the wire W wound on the wire reel 20 housed in the reel housing 2A. The rebar binding machine 1A also includes a curl forming unit 4A that curls the wire W fed by the wire feeding unit 3A and wraps it around a rebar S, a binding unit 5A that twists the wire W wound around the rebar S, and a braking unit 6A that brakes the rotating wire reel 20 to restrict its rotation. The rebar binding machine 1A also includes a handle 10a that protrudes from the main body 10, and a trigger switch 10t is provided on the handle 10a. In the following description, the side of the main body 10 of the rebar binding machine 1A on which the handle 10a is provided is referred to as the bottom, and the side opposite the handle 10a is referred to as the top. 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 includes 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 can be stopped from rotating by engaging the engaged portions 20c with the reel brake 60 of the braking unit 6A shown in FIG. 1 and other figures. The engaged portions 20c and the protruding portions 20d may have any shape that allows engagement with the reel brake 60, 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 of the hub portion 20a along the axial direction.

[0017] Next, we will explain the reel storage section 2A that stores the wire reel 20. The reel storage section 2A has a recess 22 formed in the main body 10. The recess 22 forms a space large enough to accommodate all or part of the wire reel 20, or a chamber that is covered all or part of the periphery of this space.

[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 the reel accommodating portion 2A so that the wire reel 20 can be attached to and detached from the reel accommodating portion 2A. In this example, the second support shaft 24 is configured to be retractable from the reel accommodating portion 2A.

[0020] Next, a description will be given of the wire feeding unit 3A that feeds the wire W. The wire feeding unit 3A includes a pair of feed gears 30L and 30R. As shown in FIG. 3, the pair of feed gears 30L and 30R are arranged on either side of the feed path of the wire W.

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

[0022] The wire feeding 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 rotation of the feed gear 30L.

[0023] The wire feeding 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 direction of travel of the wire W. By regulating the direction of travel of the wire W, the curl forming unit 4A imparts a curling tendency to the wire W so that the wire W draws a substantially circular shape around the reinforcing bar S (curls the wire W).

[0025] Next, we will explain 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 retractable cylinder portion 54, and a twisting hook 55. The torsion motor 51, which is driven separately from the feed motor 31, is used as the drive source for the binding unit 5A.

[0026] The threaded 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 retractable cylinder portion 54 has a thread formed on its inner circumferential surface, and is threadedly engaged with the thread on the outer circumferential surface of the threaded shaft portion 53.

[0027] The advance / retract cylinder 54 moves back and forth while its rotation is restricted by the rotation of the screw shaft 53 caused by the rotation of the torsion motor 51. The advance / retract cylinder 54 is coupled to the screw shaft 53 so as to rotate integrally with it, and is configured to rotate by the rotation of the screw shaft 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 retractable cylindrical portion 54. The twisting hooks 55 are configured to open and close in accordance with the retractable movement of the retractable cylindrical portion 54 using a known structure.

[0029] Next, we will explain 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 engaging 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. When electricity is applied, the iron core is pulled in or pushed out relative to the solenoid body. When electricity is applied, the iron core moves, causing the shaft 63 to rotate via the link 64. When the shaft 63 rotates, the reel brake 60 rotates in the same direction as the shaft 63.

[0031] The reel brake 60 is generally L-shaped when viewed from the side of the main body 10, and includes a reel brake main body extending a predetermined length downward from the connecting portion, and an extension formed so as to bend from the reel brake main body toward the reel accommodating portion 2A. The engagement portion 62 is formed on the extension and 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 it engages with the engaged portion 20c of the wire reel 20, and a retracted position, which is a second position where it disengages from the engaged portion 20c of the wire reel 20.

[0032] The wire reel 20 rotates following the feeding of the wire W by the wire feeding section 3A, but even after the wire feeding 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 feeding unit 3A stopping the feeding of the wire W, the brake unit 6A is activated to stop the rotation of the wire reel 20. Specifically, in conjunction with the wire feeding unit 3A stopping the feeding of the wire W, the solenoid 61 is energized to operate (rotate) the reel brake 60, and the engaging unit 62 moves from the retracted position to the braking position. As a result, the engaging unit 62 engages with the engaged portion 20c of the wire reel 20, stopping the rotation of the wire reel 20.

[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. Note that this includes not only cases where the entire reel brake 60 is covered except for the portion facing the tip of the engagement portion 62, but also cases 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 allows the engaging section 62 to protrude toward the reel accommodating section 2A or to 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 and matches the trajectory of the engaging section 62 that moves with the rotation of the reel brake 60 around the shaft 63 as a fulcrum.

[0036] When the engaging portion 62 is moved to the braking position, it protrudes from the first opening 14A into the reel accommodating portion 2A to a position where it engages with the engaged portion 20c of the wire reel 20. When the engaging portion 62 is moved to the retracted position, it retracts from the first opening 14A into the brake accommodating portion 12. Note that when the engaging portion 62 is moved to the retracted position, it may protrude from the first opening 14A into the reel accommodating portion 2A to a position where it disengages from the engaged portion 20c of the wire reel 20. 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 is retracted from the first opening 14A into the brake accommodating portion 12 when the engaging portion 62 is moved to the retracted position, but also a state where the engaging portion 62 protrudes from the first opening 14A into the reel accommodating portion 2A to a position where it disengages from the engaged portion 20c of the wire reel 20.

[0037] <Example of operation of the reinforcing bar binding machine according to this embodiment> Next, with reference to the respective drawings, 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.

[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 determined by the amount of wire W fed. The wire reel 20 rotates in response to the feeding of the wire W as the wire W is fed by the wire feed unit 3A. When the wire W has been fed by a predetermined amount, the wire feed unit 3A stops feeding the wire W. However, the wire reel 20 attempts to continue rotating due to inertia, so the brake unit 6A brakes the rotation of the wire reel. After the feeding operation of the wire W by the wire feed unit 3A ends by stopping the feed motor 31, the brake unit 6A brakes the wire reel 20, which has been rotating in response to the feeding of the wire W, and restricts the rotation of the wire reel 20.

[0039] In the binding section 5A, the torsion motor 51 rotates forward, 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 retractable cylindrical section 54 is restricted, so the retractable cylindrical section 54 is sent forward by the action of the engaged screw. As the retractable cylindrical 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 retractable cylindrical section 54, and grips a portion of the wire wound in a loop.

[0040] The advance / retract cylinder 54 is released from the restriction on rotation when it reaches a predetermined forward position, and rotates together with the threaded shaft 53. The twisting hook 55 gripping the wire W rotates, twisting the wire W. Note that, while the advance / retract cylinder 54 is moving forward, a cutter (not shown) is activated to cut the wire W.

[0041] When the twisting operation is completed, the twisting motor 51 rotates in the reverse direction, causing the screw shaft 53 to rotate in the reverse direction. As a result, the retractable cylinder 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 retractable cylinder 54 and the twisting hook 55 move to the standby position. When the retractable cylinder 54 and the twisting hook 55 move to the standby position, the twisting motor 51 stops, completing the series of operations. As a result, the rebar S is bound with the wire W.

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

[0043] 5, the brake accommodating portion 12A1 of the first example of the first embodiment includes a second opening 68A1 that connects the interior of the brake accommodating portion 12A1 to the outside of the brake accommodating portion 12A1 excluding the reel accommodating portion 2A. The second opening 68A1 is configured with an opening large enough to allow foreign matter Du to be discharged. The second opening 68A1 is provided in the lower part of the brake accommodating portion 12A, in the same direction as the direction in which the handle portion 10a protrudes from the main body portion 10.

[0044] In the rebar tying 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 foreign matter and remain in the reel housing 2A. Furthermore, if the wire W is coated, the coating may peel off and become foreign matter, or if the surface of the wire W is oxidized, the oxide may peel off and become foreign matter. 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 foreign matter. Furthermore, when the wire reel 20 is attached to or detached from the reel housing 2A, foreign matter may enter the reel housing 2A from the outside.

[0045] 10 to 12 are diagrams showing a conventional braking unit. In the conventional braking unit 601 shown in Fig. 10, the reel brake 60 is exposed to the reel housing 2A. With this configuration, moisture from rainwater or the like can get into the part that supports the shaft 63, causing rust on the metal parts and potentially causing the reel brake 60 to malfunction.

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

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

[0048] Furthermore, since 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, 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 connects 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 matter Du.

[0050] The lid portion 69A2 is provided on the reel brake 60 and is configured to close the second opening 68A2 with its extension 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 allows it to 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 moves 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 section 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 section 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 section 12A2 from the first opening 14A can be discharged to the outside of the brake accommodating section 12A2 when the reel brake 60 moves to the braking position, opening the lid portion 69A2, as shown in Figure 6B.

[0053] This prevents foreign matter Du and the like from accumulating inside the brake accommodating portion 12A2, thereby preventing malfunction of the reel brake 60. Furthermore, because the second opening 68A2 can be opened and closed by operating the reel brake 60, foreign matter can be discharged after each bundling operation, preventing foreign matter from accumulating in the brake accommodating portion 12A2. An operator may place the main body 10 with its top face down on the ground, for example. Therefore, if the second opening 68A2 is located below the main body 10, dust and rainwater are more likely to enter through the second opening 68A2. Therefore, providing the lid 69A2 prevents dust, rainwater, and the like from entering the brake accommodating portion 12A.

[0054] 7A and 7B, brake accommodating portion 12A3 according to a third example of the first embodiment includes second opening 68A3 that connects the inside and outside of brake accommodating portion 12A3. Second opening 68A3 is configured with an opening large enough to allow foreign matter Du to be discharged. Brake accommodating portion 12A3 includes lid 69A3 that opens and closes second opening 68A3.

[0055] As shown in FIG. 7A, the lid portion 69A3 has an outer shape that can block the second opening 68A3 when in a position that closes the second opening 68A3, and as shown in FIG. 7B, it is configured with a member that can be moved or detached 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] The brake accommodating portion 12A3 of the third example of the first embodiment includes a second opening 68A3 that connects the inside and outside of the brake accommodating portion 12A3 and a cover 69A3 that opens and closes the second opening 68A3. By opening the cover 69A3 as needed, foreign matter Du, moisture, and the like that enters the brake accommodating portion 12A3 through the first opening 14A can be discharged to the outside of the brake accommodating portion 12A3 through the second opening 68A3, as shown in FIG. 7B . This prevents foreign matter Du and the like from accumulating inside the brake accommodating portion 12A3, thereby preventing malfunctions of the reel brake 60. Operators often place the main body 10 with its top face down on the ground, etc. Therefore, if the second opening 68A3 is located below the main body 10, dust and rainwater are more likely to enter through the second opening 68A3. Therefore, providing the cover 69A3 prevents dust, rainwater, and the like from entering the brake accommodating portion 12A.

[0057] 8A and 8B, the brake accommodating portion 12A4 of the fourth example of the first embodiment includes a second opening 68A4 that connects 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 section 69A4 is an example of a concavely formed lid section capable of accommodating foreign matter Du, and as shown in FIG. 8A, when in the position that closes the second opening 68A4, it has an external shape that can block the second opening 68A4, and as shown in FIG. 8B, it is configured with a member that can be attached and detached from the second opening 68A4.

[0059] In the brake accommodating section 12A4 of the fourth example of the first embodiment, a second opening 68A4 that connects the inside and outside of the brake accommodating section 12A4 and a storage section 69A4 that can be attached and detached to the second opening 68A4 are provided, so that foreign matter Du, moisture, etc. that enters the brake accommodating section 12A4 from the first opening 14A can be stored in the storage section 69A4 as shown in Figure 8A, and can be discharged by removing the storage section 69A4 as needed 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 removed from the second opening 68A4 to discharge the accumulated foreign matter to the outside of the brake accommodating portion 12A4, making it easy to discharge the foreign matter to the outside.

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

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

[0063] In the brake accommodating section 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 foreign matter Du, moisture, etc. that has entered the brake accommodating section 12A5 from the first opening 14A can be expelled from the brake accommodating section 12A5 to the outside of the brake accommodating section 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, thereby preventing malfunction of the reel brake 60. Note that, although the fan 70 is provided adjacent to the brake accommodating portion 12A5 in this example, 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. Also, although the fan 70 is driven by the feed motor 31 in this example, a dedicated motor for driving the fan 70 may be provided.

[0065] <An example of a 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 reinforcing bar binding machine of the present embodiment. In the brake accommodating section 12 (12B1 to 12B4) of each example of the second embodiment, foreign matter Du is prevented from entering the brake accommodating section 12 through the third opening 14B that connects 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 a member that has sufficient deflection to accommodate the amount of movement of the reel brake 60 and can expand and contract by the amount of deflection, 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 with a shape that closes the third opening 14B, the third opening 14B can be constantly closed, and foreign matter Du generated within 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. Furthermore, because the sealing member 66B1 is made of an expandable member and has an expandable shape, the sealing member 66B1 is prevented from interfering with the operation of the reel brake 60.

[0069] 14, the brake accommodating portion 12B2 in the second example of the second embodiment includes a sealing member 66B2 between the third opening 14B and the engaging portion 62 of the reel brake 60. The sealing member 66B2 is an example of a shielding portion, and is made of an elastic material such as rubber. It has an outer shape that blocks the third opening 14B and includes a sealed opening 67B2 through which the engaging portion 62 of the reel brake 60 passes. The sealed opening 67B2 is an opening large enough to be in contact with the engaging portion 62 of the reel brake 60, or an opening large enough to form a gap between the sealed opening 67B2 and the engaging portion 62 of the reel brake 60 that is large enough to prevent the intrusion of foreign matter Du. The sealed opening 67B2 is provided in accordance with the trajectory of the engaging portion 62 that moves with the rotation of the reel brake 60 about 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] The brake accommodating portion 12B2 in the second example of the second embodiment is provided with a sealing member 66B2 shaped to block 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 through the third opening 14B. This prevents malfunctions of the reel brake 60. Furthermore, the sealing member 66B2 is provided with a sealing opening 67B2 through which the engaging portion 62 passes, thereby preventing the sealing member 66B2 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 elastically deformed by operation of the reel brake 60.

[0073] As shown in FIG. 15 , the brake accommodating portion 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 portion and is made of an elastic material such as rubber. It has an outer shape that closes the third opening 14B. The engaging portion 62 is provided on the sealing member 66B3 as a separate body from the reel brake 60. Alternatively, the engaging portion 62 provided on the reel brake 60 may 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 form 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 foreign matter Du. The sealing member 66B3 closes the third opening 14B in a predetermined sealing state that can prevent the intrusion of foreign matter Du. Additionally, a sliding sealing member 67B3 that contacts the outer peripheral surface of the sealing member 66B3 may be provided on the inner peripheral 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 to inside 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 through 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 potential foreign matter Du. The sealing portion 66B4 is configured to be movable relative to the third opening 14B along the movement 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 and engages with the engaged portion 20c of the wire reel 20, with the third opening 14B sealed by the sealing portion 66B4. 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, 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 advance / retract 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

[Claim 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 side thereof and the reel accommodating section provided at a rear side 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; The main body portion includes a handle portion that protrudes downward and a second opening that opens downward to the brake accommodating portion. Binding machine.

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