Rebar tying machine and reel

Abstract

To provide a rebar binding machine capable of detecting the type of reel without performing the operation of spinning the reel.SOLUTION: The rebar binding machine includes: a reel including a bobbin a wire wounded on the bobbin; a reel mounting part for mounting the reel in a spinning manner; a feeding part that feeds out the wire wounded on the bobbin around the rebar; a twisting part that twists the wire around the rebar; a type detector that detects the type of the reel; and a supporting part for supporting the reel mounting part, the feeding part, the twisting part, and the type detector. The type detector detects the type of the reel before the reel is rotated after the reel is attached to the reel mounting part.SELECTED DRAWING: Figure 24

Description

Technical Field

[0001] The present invention relates to a reinforcing bar bundling machine and a reel.

Background Art

[0002] Patent Document 1 discloses a reinforcing bar bundling machine. The reinforcing bar bundling machine includes a reel having a bobbin and a wire wound around the bobbin, a reel mounting portion for rotatably mounting the reel, a feeding portion for feeding the wire wound around the bobbin around the reinforcing bar, a twisting portion for twisting the wire around the reinforcing bar, a photointerrupter for detecting the type of the reel, and a support portion for supporting the reel mounting portion, the feeding portion, the twisting portion, and the photointerrupter.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the reinforcing bar bundling machine as described above, the reel is attached to the reel mounting portion, and when the reel rotates, the type of the reel is detected by the photointerrupter. In order to detect the type of the reel, it is necessary for the reinforcing bar bundling machine to execute an operation of rotating the reel. This specification discloses a technique capable of detecting the type of the reel without the reinforcing bar bundling machine executing an operation of rotating the reel.

Means for Solving the Problems

[0005] The rebar tying machine disclosed herein comprises a reel having a bobbin and wire wound on the bobbin; a reel mounting section for rotatably mounting the reel; a feeding section for feeding the wire wound on the bobbin around a rebar; a twisting section for twisting the wire around the rebar; a type detection section for detecting the type of reel; and a support section for supporting the reel mounting section, the feeding section, the twisting section, and the type detection section. The type detection section detects the type of reel before the reel is mounted on the reel mounting section and before the reel rotates.

[0006] According to the above configuration, the type of reel is detected when the reel is attached to the reel mounting section and before the reel rotates. The type of reel can be detected without the reel tying machine performing the action of rotating the reel.

[0007] The rebar tying machine disclosed herein includes a reel mounting section for rotatably mounting a reel having a bobbin and wire wound around the bobbin; a feeding section for feeding the wire wound around the bobbin around a rebar; a twisting section for twisting the wire around the rebar; a type detection section for detecting the type of reel; and a support section for supporting the reel mounting section, the feeding section, the twisting section, and the type detection section. The type detection section detects the type of reel before the reel is mounted on the reel mounting section and before the reel rotates.

[0008] The above configuration can achieve the same effect as the rebar tying machine described above.

[0009] The reels disclosed herein are used by being rotatably mounted on the reel mounting section of a rebar tying machine. The reel comprises a bobbin having an information section that holds type information indicating the type of reel, and wire wound on the bobbin. The information section is detected by the rebar tying machine before the reel is mounted on the reel mounting section and before the reel rotates.

[0010] According to the above configuration, when the above reel is used in a rebar tying machine, type information indicating the type of reel is detected before the reel is attached to the reel mounting part and before the reel rotates. The rebar tying machine can detect the type of reel without having to perform the action of rotating the reel. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of the rebar tying machine 2 of the first embodiment, seen from the rear left and above. [Figure 2] This is a perspective view of the rebar tying machine 2 of the first embodiment, viewed from the front, right, and above. [Figure 3] This is a side view showing the internal configuration of the rebar tying machine 2 of the first embodiment. [Figure 4] This is a perspective view of the feed unit 38 of the first embodiment. [Figure 5] This is a perspective view of the feed unit 38 and reel holder 10 of the first embodiment. [Figure 6] This is a cross-sectional view of the front upper part of the rebar tying machine 2 of the first embodiment. [Figure 7] This is a side view showing the state of the first lever member 76 and the second lever member 78 before they rotate in the cut section 44 of the first embodiment. [Figure 8] This is a side view showing the state after the first lever member 76 and the second lever member 78 have rotated in the cut section 44 of the first embodiment. [Figure 9] This is a perspective view of the twisted portion 46 of the first embodiment. [Figure 10] This is a cross-sectional view of the torsion motor 86, reduction gear 88, and holding unit 90 of the first embodiment. [Figure 11] This is an exploded perspective view of the carrier sleeve 98, clutch plate 100, and screw shaft 102 of the first embodiment. [Figure 12] This is a perspective view of the clamp shaft 110 of the first embodiment. [Figure 13] This is a perspective view of the torsion portion 46 of the first embodiment, showing the right clamp 112 and the left clamp 114 attached to the clamp shaft 110. [Figure 14] Perspective view of the right clamp 112 of the first embodiment. [Figure 15] Perspective view of the left clamp 114 of the first embodiment. [Figure 16] Perspective view of the torsion motor 86, the reduction gear 88, and the holding part 90 of the first embodiment. [Figure 17] Perspective view of the rotation limiting part 92 of the first embodiment. [Figure 18] Cross-sectional view of the reel holder 10 and the reel 33 of the first embodiment. [Figure 19] Perspective view of the bobbin 160 of the reel 33 of the first embodiment. [Figure 20] Perspective view of the holder housing 26, the type detection part 158, the turntable 204, and the sensor substrate 220 of the first embodiment. [Figure 21] Perspective view of the turntable 204 and the rotation detection magnet 218 of the first embodiment. [Figure 22] Perspective view of the holder housing 26, the type detection part 158, and the turntable 204 of the first embodiment. [Figure 23] Cross-sectional view of the detection parts 224, 226, and 228 of the first embodiment in a state where the detection switch 238 is not pushed in. [Figure 24] Cross-sectional view of the reel holder 10 and the reel 33 near the type detection part 158 of the first embodiment. [Figure 25] Cross-sectional view of the detection parts 224, 226, and 228 of the first embodiment in a state where the detection switch 238 is pushed in. [Figure 26] Perspective view of the detection parts 224, 226, and 228 of the second embodiment. [Figure 27] Cross-sectional view of the reel holder 10 and the reel 33 near the type detection part 158 of the second embodiment. [Figure 28] Cross-sectional view of the detection parts 224, 226, and 228 of the second embodiment in a state where the detection switch 238 is pushed in. [Figure 29]This is a perspective view of the holder housing 26, type detection unit 158, turntable 204, and sensor substrate 220 of the third embodiment. [Figure 30] This is a cross-sectional view of the reel holder 10 and reel 33 near the type detection unit 158 ​​of the third embodiment. [Modes for carrying out the invention]

[0012] Hereinafter, representative and non-limiting examples of the present invention will be described in detail with reference to the drawings. This detailed description is simply intended to show those skilled in the art details for carrying out preferred examples of the present invention and is not intended to limit the scope of the present invention. Furthermore, additional features and inventions disclosed below may be used separately from or in conjunction with other features and inventions to provide further improved rebar tying machines and reels, methods for manufacturing and using the same.

[0013] Furthermore, the combinations of features and processes disclosed in the following detailed description are not essential for carrying out the present invention in the broadest sense, and are described solely to illustrate representative examples of the present invention. Moreover, the various features of the representative examples described above and below, as well as the various features described in the independent and dependent claims, do not necessarily have to be combined in the same way as the examples described herein or in the order listed, in order to provide additional and useful embodiments of the present invention.

[0014] All features described herein and / or in the claims are intended to be disclosed individually and independently of each other, as limitations to the original disclosure and claimed specific subject matter, separate from the features described in the examples and / or claims. Furthermore, all descriptions of numerical ranges and groups or clusters are intended to disclose intermediate configurations as limitations to the original disclosure and claimed specific subject matter.

[0015] In one or more embodiments, the bobbin may include a body around which the wire is wound, a flange located at one end of the body, and an information unit located at the flange and holding type information indicating the type of reel. The type detection unit may detect the type information from the information unit before the reel is attached to the reel mounting unit and before the reel rotates.

[0016] With the above configuration, the type of reel can be detected by a simple method of placing the information unit in the flange portion.

[0017] In one or more embodiments, the type detection unit may include a first detection unit and a second detection unit. The information unit may include a first information unit which is detected by either the first detection unit or the second detection unit before the reel is attached to the reel mounting unit and the reel rotates.

[0018] According to the above configuration, the first information unit is detected by either the first detection unit or the second detection unit. The type of reel can be detected by a simple method that determines whether or not the first information unit is detected by either the first or second detection unit.

[0019] In one or more embodiments, the first information unit may be a rib having an annular shape. The central axis of the rib may be equal to the axis of rotation of the reel.

[0020] With the above configuration, since the central axis of the rib is equal to the rotation axis of the reel, the type of reel can be detected regardless of the rotation angle of the reel when it is attached to the reel mounting part.

[0021] In one or more embodiments, the first detection unit may be positioned further from the reel's rotation axis than the second detection unit, with respect to a direction perpendicular to the reel's rotation axis.

[0022] If the first detection unit is positioned at the same location as the second detection unit in a direction perpendicular to the rotation axis of the reel, then if the first information unit is an annular rib, both the first and second detection units will misdetect the first information unit. Furthermore, if the first information unit is a partially interrupted rib, the first and second detection units will misdetect the first information unit depending on the rotation angle when the reel is installed. With the above configuration, it is possible to suppress the misdetection of the first information unit by the first and second detection units.

[0023] In one or more embodiments, one of the first detection unit and the second detection unit may be equipped with a push-button switch that can be pressed by the first information unit.

[0024] With the above configuration, the type of reel can be detected using a simple configuration with a push-button switch.

[0025] In one or more embodiments, one of the first detection unit and the second detection unit may include a detection switch that detects when pressed by the first information unit, and a cover member that is positioned between the first information unit and the detection switch when pressed by the first information unit.

[0026] With the above configuration, it is possible to suppress the sliding of the first information unit against the detection switch when the reel rotates. This makes it possible to suppress wear on the detection switch due to the rotation of the reel.

[0027] In one or more embodiments, one of the first detection unit and the second detection unit may further include a pressing member that pushes the cover member to a position where the cover member does not come into contact with the first information unit when pressed by the first information unit.

[0028] With the above configuration, it is possible to suppress the sliding of the first information unit against the cover member when the reel rotates. This makes it possible to suppress wear of the cover member as the reel rotates.

[0029] In one or more embodiments, one of the first detection unit and the second detection unit may include a laser switch for detecting the distance to the first information unit.

[0030] According to the above configuration, when the reel is attached to the reel mounting section, neither the first detection section nor the second detection section comes into contact with the first information section. This makes it possible to suppress wear on either the first detection section or the second detection section as the reel rotates.

[0031] In one or more embodiments, the reel mounting section may include a turntable rotatably supported by a support section. When the reel is mounted on the reel mounting section, the bobbin may be fixed to the turntable.

[0032] With the above configuration, since the turntable is supported by the support unit, it is not necessary to attach or detach the turntable from the support unit. This prevents the position of the turntable's rotation axis from shifting. This, in turn, prevents the position of the reel's rotation axis from shifting.

[0033] (First embodiment) As shown in Figure 1, the rebar tying machine 2 ties multiple reinforcing bars R together using wire W. For example, the rebar tying machine 2 ties together small-diameter reinforcing bars R with a diameter of 16 mm or less, and large-diameter reinforcing bars R with a diameter greater than 16 mm (for example, 25 mm or 32 mm) using wire W. The diameter of the wire W is, for example, between 0.5 mm and 2.0 mm.

[0034] As shown in Figure 1, the rebar tying machine 2 comprises a main body 4, a grip 6, a battery mounting section 8, a battery pack B, and a reel holder 10. The grip 6 is held by the operator. The grip 6 is located at the lower rear of the main body 4. The grip 6 is integrally formed with the main body 4. A trigger 12 is provided on the upper front of the grip 6. Inside the grip 6 is a trigger switch 14 (see Figure 3) that detects whether or not the trigger 12 is pressed. The battery mounting section 8 is located below the grip 6. The battery mounting section 8 is integrally formed with the grip 6. The battery pack B can be attached and detached by sliding it against the battery mounting section 8. The battery pack B is equipped with a secondary battery, such as a lithium-ion battery. The reel holder 10 is located at the lower front of the main body 4. The reel holder 10 is located in front of the grip 6. In this embodiment, the longitudinal direction of the twisted portion 46, which will be described later, is referred to as the front-to-back direction, the direction perpendicular to the front-to-back direction is referred to as the up-and-down direction, and the direction perpendicular to both the front-to-back direction and the up-and-down direction is referred to as the left-to-right direction.

[0035] The rebar tying machine 2 is equipped with a housing 16. The housing 16 constitutes part of the support section 15. As shown in Figure 2, the housing 16 comprises a right housing 18, a left housing 20, and a motor cover 22. The right housing 18 defines the shape of the main body 4, the grip 6, and the right half of the battery mounting section 8. The left housing 20 defines the shape of the main body 4, the grip 6, and the left half of the battery mounting section 8. The motor cover 22 is mounted on the outside of the right housing 18. As shown in Figure 1, an operation display unit 24 is located on the upper rear side of the left housing 20. The operation display unit 24 comprises a main power switch 24a and a main power LED 24b. The main power switch 24a accepts user input to switch the main power of the rebar tying machine 2 on / off. The main power LED 24b indicates the on / off status of the main power of the rebar tying machine 2.

[0036] As shown in Figure 2, the reel holder 10 comprises a holder housing 26, a main cover 28, and an auxiliary cover 30. The holder housing 26 and the auxiliary cover 30 constitute part of the support portion 15. The holder housing 26 is fixed to the front lower part of the main body 4 and to the front of the battery mounting portion 8. The left end of the holder housing 26 is open. The main cover 28 is attached to the holder housing 26 so as to be rotatable around a pivot axis 26a at the bottom of the holder housing 26. The main cover 28 is biased in the opening direction by a torsion spring 31 (see Figure 3). A closed state detection sensor (not shown) is attached to the holder housing 26 to detect when the main cover 28 is closed. The auxiliary cover 30 covers the right side of the holder housing 26. The auxiliary cover 30 defines an auxiliary space 30a between itself and the right side of the holder housing 26.

[0037] As shown in Figure 1, a lock lever 32 for holding the main cover 28 closed is located at the lower front of the left housing 20. When the lock lever 32 is rotated, the biasing force of the torsion spring 31 (see Figure 3) causes the main cover 28 to open relative to the holder housing 26. When the main cover 28 is closed, the holder housing 26 and the main cover 28 define a storage space 26b (see Figure 3). A reel 33 (see Figure 3) equipped with wire W is placed in the storage space 26b. As shown in Figure 2, a hole 26c is formed on the front surface of the holder housing 26. The user can check the remaining amount of wire W on the reel 33 by looking at the reel 33 through the hole 26c.

[0038] As shown in Figure 3, the rebar tying machine 2 is equipped with a control circuit board 36. The control circuit board 36 is located inside the battery mounting section 8. The control circuit board 36 is electrically connected to the battery pack B, the trigger switch 14, and the operation display section 24 by wiring (not shown). The control circuit board 36 is also electrically connected to a closed state detection sensor (not shown) attached to the holder housing 26 by wiring (not shown).

[0039] The rebar tying machine 2 comprises a feeding section 38, a guide section 40, a cutting section 44, and a twisting section 46. The feeding section 38 is located inside the lower front part of the main body 4. The guide section 40 is located at the front of the main body 4. The cutting section 44 is located inside the lower part of the main body 4. The twisting section 46 is located inside the main body 4.

[0040] As shown in Figure 4, the feed unit 38 comprises a feed motor 50, a reduction unit 52, and a feed unit 54. The feed motor 50 is, for example, a brushless motor. The feed motor 50 is located to the right of the right housing 18 (see Figure 2) and is covered by a motor cover 22 (see Figure 2). The feed motor 50 is electrically connected to the control circuit board 36 by wiring (not shown). The feed motor 50 operates on power supplied from the battery pack B (see Figure 2).

[0041] The reduction unit 52 includes, for example, a planetary gear mechanism. The reduction unit 52 reduces the rotation of the feed motor 50.

[0042] The feed unit 54 includes a base member 56, a guide member 58, a drive gear 60, a first feed gear 62, a second feed gear 64, a release lever 66, and a compression spring 68. The guide member 58 is fixed to the base member 56. The guide member 58 has a guide hole 58a. The guide hole 58a has a tapered shape, wider at the lower end and narrower at the upper end. A wire W is inserted through the guide hole 58a.

[0043] The drive gear 60 receives rotation from the reduction gear 52. The first feed gear 62 is rotatably supported on the base member 56. The first feed gear 62 meshes with the drive gear 60. The first feed gear 62 rotates due to the rotation of the drive gear 60. The first feed gear 62 has a groove 62a. The groove 62a is formed on the outer circumferential surface of the first feed gear 62 in a direction along the rotational direction of the first feed gear 62. The second feed gear 64 meshes with the first feed gear 62. The second feed gear 64 is rotatably supported on the release lever 66. The second feed gear 64 has a groove 64a. The groove 64a is formed on the outer circumferential surface of the second feed gear 64 in a direction along the rotational direction of the second feed gear 64. The release lever 66 is pivotably supported on the base member 56 via a pivot shaft 66a. The compression spring 68 biases the release lever 66 toward the right housing 18 (see Figure 2), causing the second feed gear 64 to move toward the first feed gear 62. This causes the second feed gear 64 to press against the first feed gear 62. As a result, the wire W is held between the groove 62a of the first feed gear 62 and the groove 64a of the second feed gear 64. As shown in Figure 5, when the lock lever 32 is rotated in the direction that releases the main cover 28, the lower end of the release lever 66 is pushed in by the lock lever 32 and moves toward the right housing 18. This causes the second feed gear 64 to move away from the first feed gear 62. In this state, the user can set the wire W of the reel 33 (see Figure 4) between the groove 62a of the first feed gear 62 and the groove 64a of the second feed gear 64. As shown in Figure 2, windows 16a are formed on the front of the left housing 20 and the front of the motor cover 22, allowing the user to visually see where the first feed gear 62 and the second feed gear 64 mesh.

[0044] As shown in Figure 4, the wire W is held between the groove 62a of the first feed gear 62 and the groove 64a of the second feed gear 64, and the feed motor 50 rotates, causing the wire W to move. In this embodiment, when the feed motor 50 rotates forward, the drive gear 60 rotates in the direction D1 shown in Figure 4, and the wire W is fed out from the reel 33 toward the guide section 40. When the feed motor 50 rotates backward, the drive gear 60 rotates in the direction D2 shown in Figure 4, and the wire W is pulled back from the feed section 38 toward the reel 33.

[0045] As shown in Figure 6, the guide section 40 includes an upper curl guide 70 and a lower curl guide 71. The upper curl guide 70 and the lower curl guide 71 are located at the front of the main body 4. The lower end of the upper curl guide 70 is open downwards. This forms an upper wire passage 70a in the upper curl guide 70. The lower curl guide 71 is located below the upper curl guide 70. The upper end of the lower curl guide 71 is open upwards. This forms a lower wire passage 71a in the lower curl guide 71.

[0046] The wire W fed from the feed section 38 (see Figure 4) is sent to the upper wire passage 70a. The wire W passes through the upper wire passage 70a from the rear to the front. At this time, the wire W is given a downward curl. After passing through the upper wire passage 70a, the wire W is sent to the lower wire passage 71a. The wire W passes through the lower wire passage 71a from the front to the rear. As a result, the wire W is wound around the reinforcing bar R.

[0047] As shown in Figure 7, the cutting section 44 includes a fixed cutter member 72, a movable cutter member 74, a first lever member 76, a second lever member 78, a link member 80, and a torsion spring 82. As shown in Figure 6, the fixed cutter member 72 and the movable cutter member 74 are arranged on a passage through which the wire W is fed from the feed section 38 toward the guide section 40. The fixed cutter member 72 has a hole 72a through which the wire W can pass. The movable cutter member 74 is supported by the fixed cutter member 72 so as to be rotatable by sliding around the fixed cutter member 72. The movable cutter member 74 has a hole 74a through which the wire W can pass. As shown in Figure 7, when the hole 72a of the fixed cutter member 72 and the hole 74a of the movable cutter member 74 are in communication (hereinafter also referred to as the communication state), the wire W can pass through the hole 72a of the fixed cutter member 72 and the hole 74a of the movable cutter member 74. When the movable cutter member 74 rotates relative to the fixed cutter member 72 in the direction D3 shown in Figure 6 (hereinafter also referred to as the cutting state), the wire W is cut by the fixed cutter member 72 and the movable cutter member 74.

[0048] As shown in Figure 7, the first lever member 76 and the second lever member 78 are fixed to each other. The first lever member 76 and the second lever member 78 are pivotable around axis RX. The lower ends of the first lever member 76 and the second lever member 78 are rotatably connected to the rear end of a link member 80. The front end of the link member 80 is rotatably connected to the lower end of the movable cutter member 74. The rear end of the link member 80 is biased forward by a torsion spring 82. When the lower ends of the first lever member 76 and the second lever member 78 pivot forward, the link member 80 moves forward, and the fixed cutter member 72 and the movable cutter member 74 are in communication. As shown in Figure 8, when the lower ends of the first lever member 76 and the second lever member 78 pivot rearward, the link member 80 moves rearward, and the fixed cutter member 72 and the movable cutter member 74 are in a cutting state.

[0049] As shown in Figure 9, the torsion section 46 comprises a torsion motor 86, a reduction section 88, a holding section 90, and a rotation limiting section 92. The torsion motor 86 is, for example, a brushless motor. The torsion motor 86 is fixed to the right housing 18 (see Figure 1) and the left housing 20 (see Figure 1). The torsion motor 86 is electrically connected to the control circuit board 36 (see Figure 3) by wiring (not shown). The torsion motor 86 operates on power supplied from the battery pack B (see Figure 1).

[0050] The reduction unit 88 is fixed to the right housing 18 and the left housing 20. The reduction unit 88 includes, for example, a planetary gear mechanism. The reduction unit 88 reduces the rotation of the torsion motor 86.

[0051] As shown in Figure 10, the holding portion 90 includes a bearing box 96, a carrier sleeve 98, a clutch plate 100, a screw shaft 102, an inner sleeve 104, an outer sleeve 106, a push plate 108, a clamp shaft 110, a right clamp 112, and a left clamp 114.

[0052] The bearing box 96 is fixed to the reduction gear 88. The bearing box 96 rotatably supports the carrier sleeve 98 via the bearing 96a. Rotation is transmitted to the carrier sleeve 98 from the reduction gear 88. When the torsion motor 86 rotates forward, the carrier sleeve 98 rotates in the direction of a left-hand thread when viewed from the rear. When the torsion motor 86 rotates backward, the carrier sleeve 98 rotates in the direction of a right-hand thread when viewed from the rear.

[0053] As shown in Figure 11, a clutch groove 98a extending in the front-rear direction is formed on the inner surface of the rear of the carrier sleeve 98. A first wall portion 98b and a second wall portion 98c are formed at the front end of the clutch groove 98a. The distance in the front-rear direction from the rear end of the carrier sleeve 98 to the first wall portion 98b is smaller than the distance in the front-rear direction from the rear end of the carrier sleeve 98 to the second wall portion 98c. The clutch plate 100 is located inside the carrier sleeve 98. The clutch plate 100 has a clutch piece 100a formed on it that corresponds to the clutch groove 98a. The clutch plate 100 is biased towards the rear of the carrier sleeve 98 by a compression spring 116 located inside the carrier sleeve 98. The clutch plate 100 can advance relative to the carrier sleeve 98 to a position where the clutch piece 100a contacts the first wall portion 98b of the clutch groove 98a. When the wire W is twisted, the carrier sleeve 98 rotates in the left-hand thread direction when viewed from the rear of the clutch plate 100, allowing the clutch plate 100 to advance relative to the carrier sleeve 98 until the clutch piece 100a contacts the second wall portion 98c of the clutch groove 98a.

[0054] The rear portion 102a of the screw shaft 102 is inserted into the carrier sleeve 98 from the front and fixed to the clutch plate 100. A radially projecting flange 102c is formed between the rear portion 102a and the front portion 102b of the screw shaft 102. A helical ball groove 102d is formed on the outer circumferential surface of the front portion 102b of the screw shaft 102. An engagement portion 102e, smaller in diameter than the front portion 102b, is formed at the front end of the screw shaft 102.

[0055] As shown in Figure 10, a compression spring 118 is attached to the front portion 102b of the screw shaft 102. The front portion 102b of the screw shaft 102 is inserted into the inner sleeve 104 from the rear. The inner sleeve 104 has a ball hole 104a for holding a ball 120. The ball 120 fits into the ball groove 102d of the screw shaft 102. A flange 104b that protrudes radially is formed at the rear end of the inner sleeve 104. The inner sleeve 104 is inserted into the outer sleeve 106 from the rear. The outer sleeve 106 is fixed to the inner sleeve 104. If the rotation of the outer sleeve 106 is permitted by the rotation limiting portion 92 (see Figure 17), when the screw shaft 102 rotates, the inner sleeve 104 and the outer sleeve 106 rotate together. When the rotation of the outer sleeve 106 is prohibited by the rotation limiting unit 92, when the screw shaft 102 rotates, the inner sleeve 104 and outer sleeve 106 move in the front-rear direction relative to the screw shaft 102. Specifically, when the torsion motor 86 rotates forward and the screw shaft 102 rotates in the left-hand thread direction when viewed from the rear, the inner sleeve 104 and outer sleeve 106 move forward relative to the screw shaft 102. Also, when the torsion motor 86 rotates backward and the screw shaft 102 rotates in the right-hand thread direction when viewed from the rear, the inner sleeve 104 and outer sleeve 106 move backward relative to the screw shaft 102. The push plate 108 is positioned between the rear end of the outer sleeve 106 and the flange 104b of the inner sleeve 104. Therefore, when the inner sleeve 104 and outer sleeve 106 move in the front-rear direction, the push plate 108 also moves in the front-rear direction. A slit 106a is formed in the front part of the outer sleeve 106, extending from the front end toward the rear.

[0056] The clamp shaft 110 is inserted into the inner sleeve 104 from the front. The engagement portion 102e of the screw shaft 102 is inserted into the rear end of the clamp shaft 110. The clamp shaft 110 is fixed to the screw shaft 102. As shown in Figure 12, the clamp shaft 110 has a flat plate portion 110a, an opening 110b, and a flange 110c. The flat plate portion 110a is located at the front end of the clamp shaft 110 and has a flat plate shape along the vertical and front-rear directions. The flat plate portion 110a has a hole 110d into which a pin 122 (see Figure 13) fits. The opening 110b is located behind the flat plate portion 110a. The opening 110b penetrates the clamp shaft 110 in the left-right direction and extends in the front-rear direction. The flange 110c is located behind the opening 110b and protrudes radially.

[0057] As shown in Figure 13, the right clamp 112 is attached to the clamp shaft 110 so as to pass through the opening 110b of the clamp shaft 110 from right to left. The left clamp 114 is attached to the clamp shaft 110 below the right clamp 112 so as to pass through the opening 110b of the clamp shaft 110 from left to right.

[0058] As shown in Figure 14, the right clamp 112 comprises a base portion 112a, a lower projection 112b, an upper projection 112c, a contact portion 112d, an upper guard portion 112e, and a front guard portion 112f. The base portion 112a has a flat plate shape along the front-rear and left-right directions. The lower projection 112b is located at the right end of the base portion 112a and protrudes downward from the base portion 112a. The upper projection 112c is located at the right front end of the base portion 112a and protrudes upward from the base portion 112a. The contact portion 112d protrudes to the left from the upper end of the upper projection 112c. The upper guard portion 112e receives and protrudes to the left from the upper end of the contact portion 112d. The front guard portion 112f protrudes to the left from the front end of the upper projection portion 112c and the contact portion 112d. Cam holes 112g and 112h are formed in the base portion 112a. The cam holes 112g and 112h have a shape that extends from the rear end to the front end, first toward the front, then bends and extends toward the front right, and then bends again and extends toward the front.

[0059] As shown in Figure 15, the left clamp 114 comprises a base portion 114a, a pin holding portion 114b, a lower projection portion 114c, a contact portion 114d, a rear guard portion 114e, and a front guard portion 114f. The base portion 114a has a flat plate shape along the front-rear and left-right directions. The pin holding portion 114b is located at the left front end of the base portion 114a and is located above the base portion 114a, slidably holding the pin 122 (see Figure 13). The lower projection portion 114c is located at the left front end of the base portion 114a and protrudes downward from the base portion 114a. The contact portion 114d protrudes to the right from the lower end of the lower projection portion 114c. The rear guard portion 114e protrudes to the right from the rear end of the contact portion 114d. The front guard portion 114f protrudes to the right from the front end of the contact portion 114d. Cam holes 114g and 114h are formed in the base portion 114a. The cam holes 114g and 114h have a shape that extends from the rear end to the front end, first towards the front, then bends and extends towards the left front, then bends and extends towards the front, then bends and extends towards the left front, and then bends and extends towards the front.

[0060] As shown in Figure 13, with the right clamp 112 and the left clamp 114 attached to the clamp shaft 110, the cam sleeve 124 is positioned to pass through the cam holes 112g and 114g, and the cam sleeve 126 is positioned to pass through the cam holes 112h and 114h. In addition, the support pin 128 is positioned to pass through the cam sleeve 124, and the support pin 130 is positioned to pass through the cam sleeve 126. An annular cushion 131 is attached between the right clamp 112 and the left clamp 114 and the flange 110c of the clamp shaft 110.

[0061] As shown in Figure 9, when the clamp shaft 110 is attached to the inner sleeve 104, the right clamp 112 and the left clamp 114 enter into the slit 106a of the outer sleeve 106, and the support pins 128 and 130 are connected to the outer sleeve 106. When the clamp shaft 110 moves in the front-rear direction relative to the outer sleeve 106, the cam sleeve 124 attached to the support pin 128 moves in the front-rear direction within the cam holes 112g and 114g, and the cam sleeve 126 attached to the support pin 130 moves in the front-rear direction within the cam holes 112h and 114h, causing the right clamp 112 and the left clamp 114 to move in the left-right direction.

[0062] As shown in Figure 13, in the initial state where the clamp shaft 110 protrudes forward from the outer sleeve 106, the right clamp 112 is positioned furthest to the right relative to the left clamp 114. In this state, a right-side wire passage 132 through which the wire W can pass is formed between the upper protrusion 112c of the right clamp 112 and the flat plate portion 110a of the clamp shaft 110, and the upper side of the right-side wire passage 132 is covered by the upper guard portion 112e. This state of the right clamp 112 is called the fully open state. From this state, when the outer sleeve 106 moves forward relative to the clamp shaft 110, the right clamp 112 moves to the left toward the clamp shaft 110. In this state, the wire W is clamped between the lower end of the contact portion 112d of the right clamp 112 and the upper end of the flat plate portion 110a of the clamp shaft 110, and the front side of the right-side wire passage 132 is covered by the front guard portion 112f. This state of the right clamp 112 is called the fully closed state.

[0063] In the initial state, when the clamp shaft 110 protrudes forward from the outer sleeve 106, the left clamp 114 is located furthest to the left of the clamp shaft 110. In this state, a left wire passage 134 is formed between the lower protrusion 114c of the left clamp 114 and the flat plate portion 110a of the clamp shaft 110, through which the wire W can pass. This state of the left clamp 114 is called the fully open state. From this state, when the outer sleeve 106 moves forward relative to the clamp shaft 110, the left clamp 114 moves to the right toward the clamp shaft 110. Even in this state, the wire W can pass through the left wire passage 134, but the rear side of the left wire passage 134 is covered by the rear guard portion 114e, and the front side of the left wire passage 134 is covered by the front guard portion 114f. This state of the left clamp 114 is called the half-open state. From this state, if the outer sleeve 106 moves further forward relative to the clamp shaft 110, the left clamp 114 moves further to the right toward the clamp shaft 110. In this state, the wire W is clamped between the upper end of the contact portion 114d of the left clamp 114 and the lower end of the flat portion 110a of the clamp shaft 110. This state of the left clamp 114 is called the fully closed state.

[0064] The wire W, which is fed from the feed section 38 (see Figure 6) to the guide section 40 (see Figure 6), passes through the left wire passage 134 before reaching the guide section 40. As a result, the left clamp 114 is fully closed, and when the wire W is cut by the cutting section 44 (see Figure 6), the left clamp 114 and the clamp shaft 110 hold the end of the wire W that is wound around the reinforcing bar R.

[0065] Furthermore, the wire W guided by the guide section 40 passes through the right wire passage 132. Therefore, when the right clamp 112 is fully closed, the tip of the wire W wound around the reinforcing bar R is held by the right clamp 112 and the clamp shaft 110.

[0066] As shown in Figure 16, fins 138 are formed on the rear outer surface of the outer sleeve 106. The fins 138 extend in the front-rear direction. In this embodiment, eight fins 138 are arranged on the outer circumferential surface of the outer sleeve 106 at 45-degree intervals from each other. In this embodiment, the eight fins 138 consist of seven short fins 138a and one long fin 138b. The length of the long fin 138b in the front-rear direction is longer than the length of the short fin 138a in the front-rear direction. In the front-rear direction, the position of the rear end of the long fin 138b is the same as the position of the rear end of the short fin 138a. In the front-rear direction, the position of the front end of the long fin 138b is forward of the position of the front end of the short fin 138a.

[0067] The rotation limiting section 92 is positioned to correspond to the fins 138 of the outer sleeve 106. The rotation limiting section 92 cooperates with the fins 138 to allow or prohibit the rotation of the outer sleeve 106. As shown in Figure 17, the rotation limiting section 92 comprises a base member 140, an upper stopper 142, a lower stopper 144, and torsion springs 146 and 148. The base member 140 is fixed to the right housing 18 (see Figure 1). The upper stopper 142 is pivotably supported on the upper part of the base member 140 via a pivot shaft 140a. The upper stopper 142 includes a restricting piece 142a. The restricting piece 142a is located below the upper stopper 142. The torsion spring 146 biases the restricting piece 142a in an outward direction (i.e., in a direction away from the base member 140). The lower stopper 144 is pivotably supported on the lower part of the base member 140 via a pivot shaft 140b. The lower stopper 144 includes a restricting piece 144a. The restricting piece 144a is located on the upper part of the lower stopper 144. The rear end of the restricting piece 144a is positioned in front of the rear end of the restricting piece 142a. A torsion spring 148 biases the restricting piece 144a in a direction that opens it outward (i.e., in a direction that moves the restricting piece 144a away from the base member 140).

[0068] Regarding the upper stopper 142, when the torsion motor 86 (see Figure 10) rotates forward and the screw shaft 102 (see Figure 10) rotates in the left-hand thread direction when viewed from the rear, the fins 138 (see Figure 16) of the outer sleeve 106 come into contact with the restricting piece 142a, and the rotation of the outer sleeve 106 is prohibited by the upper stopper 142. On the other hand, when the torsion motor 86 rotates backward and the screw shaft 102 rotates in the right-hand thread direction when viewed from the rear, the fins 138 of the outer sleeve 106 come into contact with the restricting piece 142a and push the restricting piece 142a inward. In this case, the upper stopper 142 does not prohibit the rotation of the outer sleeve 106.

[0069] Regarding the lower stopper 144, when the torsion motor 86 rotates in the forward direction and the screw shaft 102 rotates in the left-hand thread direction when viewed from the rear, the fins 138 of the outer sleeve 106 will continue to push the restricting piece 144a even if they come into contact with it. In this case, the lower stopper 144 does not prevent the rotation of the outer sleeve 106. On the other hand, when the screw shaft 102 rotates in the right-hand thread direction when viewed from the rear, the fins 138 of the outer sleeve 106 will come into contact with the restricting piece 144a, and the rotation of the outer sleeve 106 will be prevented by the lower stopper 144.

[0070] Next, the operation of the rebar tying machine 2 shown in Figure 1 will be explained. When the trigger 12 is operated by the operator, the rebar tying machine 2 performs a tying operation. When the rebar tying machine 2 performs a tying operation, the following steps are performed: feeding process, tip holding process, pulling back process, end holding process, cutting process, twisting process, and return process.

[0071] (Feed-out process) When the feed motor 50 shown in Figure 4 rotates forward from the initial state of the rebar tying machine 2 (i.e., rotates in direction D1 shown in Figure 4), the feed unit 38 feeds out a predetermined length of wire W from the reel 33. The tip of the wire W passes through the fixed cutter member 72, the movable cutter member 74, the left wire passage 134, the guide unit 40, and the right wire passage 132 in that order. As a result, the wire W is wound around the rebar R in a circular pattern. When the feeding of the wire W is complete, the feed motor 50 stops.

[0072] (Tip holding process) After the feeding process is complete, when the torsion motor 86 shown in Figure 10 rotates in the forward direction, the screw shaft 102 rotates in the left-hand thread direction. At this time, the rotation limiting unit 92 prevents the outer sleeve 106 from rotating in the left-hand thread direction. As a result, the outer sleeve 106, together with the inner sleeve 104, moves forward relative to the clamp shaft 110, causing the right clamp 112 to be fully closed and the left clamp 114 to be half-open. This holds the tip of the wire W between the right clamp 112 and the clamp shaft 110. When it is detected that the tip of the wire W is being held, the torsion motor 86 stops.

[0073] (Retraction process) After the tip holding process is complete, when the feed motor 50 shown in Figure 4 rotates in the reverse direction (i.e., in direction D2 shown in Figure 4), the feed unit 38 pulls back the wire W that has been wound around the reinforcing bar R. Because the tip of the wire W is held by the right clamp 112 and the clamp shaft 110, the wire W around the reinforcing bar R is reduced in diameter. When the wire W has been pulled back, the feed motor 50 stops.

[0074] (Terminal holding process) After the pull-back process is complete, when the torsion motor 86 shown in Figure 10 rotates in the forward direction, the screw shaft 102 rotates in the left-hand thread direction. At this time, the outer sleeve 106 is prevented from rotating in the left-hand thread direction by the rotation limiting unit 92. As a result, the outer sleeve 106, together with the inner sleeve 104, moves forward relative to the clamp shaft 110, and the left clamp 114 becomes fully closed. This holds the end of the wire W between the left clamp 114 and the clamp shaft 110.

[0075] (cutting process) After the end-holding process is completed, the torsion motor 86 shown in Figure 10 rotates further in the forward direction, causing the screw shaft 102 to rotate in the left-hand thread direction. At this time, the outer sleeve 106 is prevented from rotating in the left-hand thread direction by the rotation limiting unit 92. As a result, the outer sleeve 106, together with the inner sleeve 104, moves further forward relative to the clamp shaft 110, and as shown in Figure 8, the push plate 108 pushes down the upper end of the second lever member 78 toward the front. This causes the wire W to be cut by the fixed cutter member 72 and the movable cutter member 74. Once the cutting of the wire W is complete, the torsion motor 86 stops.

[0076] (Twisting process) After the cutting process is complete, the torsion motor 86 shown in Figure 10 rotates further in the forward direction, causing the screw shaft 102 to rotate in the left-hand thread direction. At this time, the outer sleeve 106 is allowed to rotate in the left-hand thread direction by the rotation limiting section 92. As a result, the outer sleeve 106, inner sleeve 104, clamp shaft 110, right clamp 112, and left clamp 114 rotate together in the left-hand thread direction. This twists the wire W wound around the reinforcing bar R. Once the twisting of the wire W is complete, the torsion motor 86 stops.

[0077] (Recovery process) After the torsion process is complete, when the torsion motor 86 shown in Figure 10 rotates in the reverse direction, the screw shaft 102 rotates in the right-hand thread direction. At this time, the outer sleeve 106 is prevented from rotating in the right-hand thread direction by the rotation limiting unit 92. Therefore, the outer sleeve 106, together with the inner sleeve 104, retracts relative to the clamp shaft 110. The left clamp 114 goes from a half-open state to a fully open state, and then the right clamp 112 becomes fully open. After that, when rotation in the right-hand thread direction is permitted by the rotation limiting unit 92, the outer sleeve 106, inner sleeve 104, clamp shaft 110, right clamp 112, and left clamp 114 rotate together in the right-hand thread direction. When the long fin 138b contacts the lower stopper 144, the rotation of the outer sleeve 106 is prohibited again, and the outer sleeve 106, together with the inner sleeve 104, retracts again relative to the clamp shaft 110. When it is detected that the torsion part 46 has returned to its initial state, the torsion motor 86 stops.

[0078] In the rebar tying machine 2, wires W of various thicknesses are selected according to the diameter of the rebar R used. Furthermore, depending on the environment in which the rebar R is used, wires W covered with a coating (e.g., resin material) or plated wires W are selected. The type of reel 33 (see Figure 18) is distinguished according to the thickness of the wire W, the presence or absence of a coating, and the presence or absence of plating. For this reason, the rebar tying machine 2 is equipped with a type detection unit 158 ​​for detecting the type of reel 33.

[0079] First, let's describe the reel 33. As shown in Figure 18, the reel 33 is positioned in the housing space 26b of the reel holder 10. The reel 33 is supported in the reel holder 10 so as to be rotatable around a rotation axis AX that extends in the left-right direction. The reel 33 comprises a bobbin 160 and a wire W. The central axis of the bobbin 160 is equal to the rotation axis AX of the reel 33.

[0080] As shown in Figure 19, the bobbin 160 comprises a body portion 162, a pair of flange portions 164 and 166, a number of (six in this embodiment) protrusions 168, and an information section 170. Hereafter, the pair of flange portions 164 and 166 may be referred to as the left flange portion 164 and the right flange portion 166, respectively. The body portion 162, the pair of flange portions 164 and 166, the six protrusions 168, and the information section 170 are made of, for example, a resin material. The body portion 162, the pair of flange portions 164 and 166, the six protrusions 168, and the information section 170 are integrally formed.

[0081] As shown in Figure 18, the body portion 162 comprises an outer cylindrical portion 172, an inner cylindrical portion 174, and a connecting portion 176. The outer cylindrical portion 172 and the inner cylindrical portion 174 have a substantially cylindrical shape. Multiple layers of wire W are wound around the outer circumferential surface of the outer cylindrical portion 172. The inner cylindrical portion 174 is located inside the outer cylindrical portion 172. A bearing groove 174a is formed at the left end of the inner circumferential surface of the inner cylindrical portion 174. The connecting portion 176 is located between the inner circumferential surface of the outer cylindrical portion 172 and the outer circumferential surface of the inner cylindrical portion 174. The connecting portion 176 connects the outer cylindrical portion 172 and the inner cylindrical portion 174.

[0082] As shown in Figure 19, the left flange 164 and the right flange 166 have a wide, annular shape. The wire W (see Figure 18) is positioned between the left flange 164 and the right flange 166. The left flange 164 is located at the left end of the body 162. The left flange 164 extends radially outward from the outer circumferential surface of the outer cylinder 172. The left flange 164 has a locking groove 178 that penetrates the left flange 164 in the thickness direction (left-right direction). The locking groove 178 includes a guide portion 178a extending from the inner circumferential surface to the outer circumferential surface of the left flange portion 164, a starting end locking portion 178b connected to the guide portion 178a near the inner circumferential surface of the left flange portion 164, and a terminal locking portion 178c connected to the guide portion 178a near the outer circumferential surface of the left flange portion 164. One end of the wire W wound around the outer cylinder portion 172 is locked to the left flange portion 164 by the starting end locking portion 178b. The other end of the wire W wound around the outer cylinder portion 172 is locked to the left flange portion 164 by the terminal locking portion 178c.

[0083] The right guard portion 166 is located at the right end of the body portion 162. The right guard portion 166 extends radially outward from the outer circumferential surface of the outer cylinder portion 172. The diameter of the outer circumferential surface of the right guard portion 166 is equal to the diameter of the outer circumferential surface of the left guard portion 164.

[0084] The six projections 168 extend outward (to the right) from between the inner circumferential surface of the outer cylindrical portion 172 and the outer circumferential surface of the inner cylindrical portion 174, along the rotation axis AX of the reel 33, and beyond the outer surface (right side) of the right flange portion 166. The projections 168 have a cylindrical shape. The six projections 168 are arranged at equal intervals around the rotation axis AX of the reel 33 (along the rotation direction of the reel 33). In this embodiment, adjacent projections 168 are arranged with an interval corresponding to a 60-degree angle around the rotation axis AX of the reel 33.

[0085] The information unit 170 comprises a first information unit 180 and a second information unit 182. The first information unit 180 includes a first rib 186 having an annular shape. The first rib 186 protrudes outward (to the right) from the outer surface (right side) of the right flange 166 along the rotation axis AX of the reel 33. The central axis of the first rib 186 is equal to the rotation axis AX of the reel 33. The first rib 186 surrounds six protrusions 168. The radial thickness of the first rib 186 is constant in the circumferential direction of the outer surface of the first rib 186.

[0086] The second information section 182 includes a second rib 188 having an annular shape. The second rib 188 protrudes outward (to the right) from the outer surface (right side) of the right flange 166 along the rotation axis AX of the reel 33. With respect to the direction along the rotation axis AX of the reel 33, the height of the second rib 188 is equal to the height of the first rib 186. The second rib 188 is located further from the rotation axis AX of the reel 33 than the first rib 186, and is positioned near the periphery of the outer surface of the right flange 166. The central axis of the second rib 188 is equal to the rotation axis AX of the reel 33. The radial width of the second rib 188 is constant in the circumferential direction of the outer surface of the second rib 188. The radial width of the second rib 188 is equal to the radial width of the first rib 186.

[0087] The position of the first information unit 180, the position of the second information unit 182, and the number of Nth information units in the information unit 170 vary depending on the type of reel 33. For example, in a different type of reel 33, the first information unit 180 of that reel 33 is located at an intermediate position between the first information unit 180 and the second information unit 182 of the reel 33 described above, and the second information unit 182 of the different type of reel 33 is located at the same position as the second information unit 182 of the reel 33 described above. Furthermore, in a different type of reel 33, for example, the information unit 170 further includes a third information unit located at an intermediate position between the first information unit 180 and the second information unit 182.

[0088] As shown in Figure 18, the reel holder 10 further includes a reel mounting portion 192 for rotatably mounting the reel 33 relative to the reel holder 10. The reel mounting portion 192 includes a left reel mounting portion 194 and a right reel mounting portion 196.

[0089] The left reel mounting section 194 is attached to the main cover 28. The left reel mounting section 194 includes a stopper 198, a cap 200, and a compression spring 202. The stopper 198 has a cylindrical shape with a bottom wall 198a at its right end. The main cover 28 has an insertion opening 28a, and the stopper 198 is inserted into the insertion opening 28a from the left side of the main cover 28. The stopper 198 has a flange 198b located at its left end. The flange 198b can contact the main cover 28 from the left side. This prevents the stopper 198 from coming out of the insertion opening 28a from the left side to the right side. The cap 200 is fixed to the left side of the main cover 28. The cap 200 prevents the stopper 198 from coming out of the insertion opening 28a from the right side to the left side. One end of the compression spring 202 is fixed to the cap 200, and the other end of the compression spring 202 is in contact with the bottom wall 198a of the stopper 198. When the main cover 28 is closed to the holder housing 26 and the reel 33 is positioned in the storage space 26b, the compression spring 202 biases the stopper 198 toward the bearing groove 174a of the inner cylindrical portion 174. The stopper 198 is received in the bearing groove 174a and slidably supports the inner cylindrical portion 174.

[0090] The right reel mounting section 196 includes a turntable 204 and a bearing 206. An insertion opening 26d is formed on the right side of the holder housing 26, and the turntable 204 is inserted into the insertion opening 26d. The turntable 204 is positioned within the insertion opening 26d with a gap between it and the holder housing 26. The turntable 204 is rotatable around a rotation axis that extends in the left-right direction. The rotation axis of the turntable 204 is equal to the rotation axis AX of the reel 33. The turntable 204 includes a turntable body 208, an engaging member 210, and a shaft member 212. The turntable body 208 has a substantially disc shape. As shown in Figure 22, the turntable body 208 includes a plurality (six in this embodiment) of receiving sections 208a and a plurality (six in this embodiment) of guide grooves 208b. In Figure 22, the holder housing 26 is shown in a simplified form. The number of receiving portions 208a is equal to the number of protrusions 168. The receiving portions 208a have a circular cross-sectional shape. The receiving portions 208a are recessed from the left side of the turntable body 208. The six receiving portions 208a are arranged at equal intervals around the rotation axis AX of the reel 33 (along the rotation direction of the reel 33). In this embodiment, adjacent receiving portions 208a are arranged with an interval corresponding to a 60-degree angle around the rotation axis AX of the reel 33. The guide groove 208b is connected to the receiving portions 208a. The guide groove 208b extends around the rotation axis AX of the reel 33. The guide groove 208b is recessed from the left side of the turntable body 208. The depth of the guide groove 208b gradually increases from one end toward the receiving portion 208a. The guide groove 208b guides the projection 168 toward the receiving portion 208a when the reel 33 is attached to the turntable 204.

[0091] The engaging member 210 has a substantially cylindrical shape. The engaging member 210 extends from the left side of the turntable body 208 toward the left. As shown in Figure 18, when the reel 33 is placed in the storage space 26b, the engaging member 210 is inserted into the inner cylindrical portion 174 from the right side and engages with the inner cylindrical portion 174.

[0092] The shaft member 212 extends from the right side of the turntable body 208 toward the right. The shaft member 212 has a substantially cylindrical shape. The shaft member 212 is rotatably supported in the holder housing 26 via a bearing 206.

[0093] The reel holder 10 includes a rotation detection magnetic sensor 216 (see Figure 20) and a plurality (two in this embodiment) rotation detection magnets 218 (see Figure 21). As shown in Figure 20, the rotation detection magnetic sensor 216 is fixed to the sensor substrate 220. In Figure 20, the rotation detection magnetic sensor 216 is shown with a dashed line, and the holder housing 26 is shown in a simplified form. The sensor substrate 220 is fixed to the holder housing 26. Although not shown, the rotation detection magnetic sensor 216 is positioned to overlap with the turntable body 208 (see Figure 21) in the direction along the rotation axis AX of the reel 33 (see Figure 18).

[0094] As shown in Figure 21, the two rotation detection magnets 218 are fixed to the right side of the turntable body 208. The two rotation detection magnets 218 are positioned at an angle corresponding to 180 degrees around the rotation axis AX of the reel 33. The rotation detection magnets 218 rotate together with the turntable body 208. When the turntable 204 is rotating, the rotation detection magnets 218 pass a position opposite the rotation detection magnetic sensor 216 (see Figure 20). When the rotation detection magnetic sensor 216 comes into contact with the rotation detection magnets 218, it detects, for example, a fluctuation in the magnetic field and detects the rotation detection magnets 218. This allows the rotation of the turntable 204, i.e., the rotation of the reel 33, to be detected.

[0095] Next, the type detection unit 158 ​​will be described. As shown in Figure 22, the type detection unit 158 ​​is attached to the holder housing 26. Therefore, the type detection unit 158 ​​does not rotate even when the reel 33 (see Figure 19) rotates. The type detection unit 158 ​​comprises a first detection unit 224, a second detection unit 226, and a third detection unit 228.

[0096] The holder housing 26 has a first through-hole 230, a second through-hole 232, and a third through-hole 234 that penetrate the holder housing 26. At least a portion of the first detection unit 224 is located in the first through-hole 230, at least a portion of the second detection unit 226 is located in the second through-hole 232, and at least a portion of the third detection unit 228 is located in the third through-hole 234. The first detection unit 224, the second detection unit 226, and the third detection unit 228 are each electrically connected to the control circuit board 36 (see Figure 3) by wiring (not shown). The wiring can be located outside the housing space 26b (see Figure 18), which can prevent the wiring from coming into contact with the rotating turntable 204 or reel 33 (see Figure 18). The first detection unit 224 is located further away from the rotation axis AX of the reel 33 than the turntable 204. The second detection unit 226 is positioned further from the rotation axis AX of the reel 33 than the first detection unit 224. The third detection unit 228 is positioned further from the rotation axis AX of the reel 33 than the second detection unit 226. As shown in Figure 24, the first detection unit 224 is positioned opposite the first rib 186 of the reel 33 when the reel 33 is attached to the reel mounting portion 192. The third detection unit 228 is positioned opposite the second rib 188 of the reel 33 when the reel 33 is attached to the reel mounting portion 192. The second detection unit 226 is positioned opposite the outer surface (right side) of the right flange portion 166 between the first rib 186 and the second rib 188 when the reel 33 is attached to the reel mounting portion 192.

[0097] As shown in Figure 23, the first detection unit 224 is equipped with a push-button switch. The first detection unit 224 comprises a detection switch 238, a cover member 240, and a push member 242. The detection switch 238 is normally held in a position where it is not pressed (hereinafter referred to as the initial position).

[0098] The cover member 240 is made of, for example, a metal material. The cover member 240 comprises a cover portion 244 and a contact portion 246. The cover portion 244 has a rectangular tubular shape with a bottom wall 244a at one end. The cover portion 244 covers the detection switch 238 such that the inner surface of the bottom wall 244a contacts the detection switch 238. The cover portion 244 is capable of pressing the detection switch 238. The contact portion 246 has a hemispherical shape obtained by dividing a sphere in half. The plane of the contact portion 246 is connected to the side surface near the other end of the cover portion 244, and the spherical surface of the contact portion 246 is exposed.

[0099] The pressing member 242 comprises a base portion 248 and a contact portion 250. Although not shown, the base portion 248 is rotatably supported by the holder housing 26 (see Figure 22). The contact portion 250 has a hemispherical shape, which is obtained by dividing a sphere in half. The flat surface of the contact portion 250 is connected to the side surface of the base portion 248, and the spherical surface of the contact portion 250 is exposed. The spherical surface of the contact portion 250 is in contact with the spherical surface of the part to be contacted 246.

[0100] The second detection unit 226 and the third detection unit 228 each have the same configuration as the first detection unit 224. That is, the second detection unit 226 and the third detection unit 228 each have a push-button switch that can be pressed. A detailed explanation of the second detection unit 226 and the third detection unit 228 will be omitted below.

[0101] Next, the method for detecting the type of reel 33 will be explained. First, with the main cover 28 (see Figure 18) of the reel holder 10 open, each projection 168 (see Figure 18) of the reel 33 is moved along the guide groove 208b (see Figure 22) to the receiving portion 208a (see Figure 22) and inserted into the receiving portion 208a. This causes the projection 168 to engage with the receiving portion 208a. Next, as shown in Figure 18, the main cover 28 is closed and the lock lever 32 (see Figure 1) is rotated to hold the main cover 28 in the closed position. The engaging member 210 of the turntable 204 is inserted into the inner cylindrical portion 174 and engages with the inner cylindrical portion 174, and the stopper 198 is received in the bearing groove 174a of the inner cylindrical portion 174. As a result, the reel 33 is rotatably mounted on the reel mounting portion 192 relative to the holder housing 26.

[0102] As shown in Figure 24, when the reel 33 is attached to the reel mounting portion 192, the first rib 186 contacts the cover member 240 of the first detection unit 224, pushing the cover member 240 toward the detection switch 238 of the first detection unit 224. The detection switch 238 of the first detection unit 224 detects that the cover member 240 of the first detection unit 224 has been pushed in. Also, the second rib 188 contacts the cover member 240 of the third detection unit 228, pushing the cover member 240 toward the detection switch 238 of the third detection unit 228. The detection switch 238 of the third detection unit 228 detects that the cover member 240 of the third detection unit 228 has been pushed in. Furthermore, as shown in Figure 25, in both the first detection unit 224 and the third detection unit 228, as the cover member 240 is pressed in, the pressing member 242 rotates away from its initial position, bringing the spherical surface of the contact portion 250 into contact with the spherical surface of the contacted portion 246. When the contact position between the contact portion 250 and the contacted portion 246 reaches the midpoint 246a of the spherical surface of the contacted portion 246, it rotates slightly toward the initial position and then stops. As shown in Figure 24, the first rib 186 and the pressing member 242 hold the first detection unit 224 in a state where the first rib 186 is in contact with the cover member 240 and the detection switch 238 is pressed in. Furthermore, the second rib 188 and the pressing member 242 hold the third detection unit 228 in a state where the second rib 188 is in contact with the cover member 240 and the detection switch 238 is pressed in. On the other hand, even when the reel 33 is attached to the reel mounting part 192, the detection switch 238 of the second detection unit 226 is not pressed in.

[0103] Next, the control circuit board 36 (see Figure 3) performs a type detection process to detect the type of reel 33. The control circuit board 36 performs the type detection process when it detects that the main cover 28 is closed via a closed state detection switch (not shown) attached to the holder housing 26. The type detection process is performed, for example, when a reel 33 is attached to the reel holder 10 in a newly purchased rebar tying machine 2, or when a new reel 33 is attached to the reel holder 10 to replace a used reel 33 with a new one. The type detection process is different from the tying operation in which rebar R is tied using wire W.

[0104] First, when the control circuit board 36 determines that the main cover 28 is closed, it detects the pressed-down detection switch 238 before executing the tying operation of the rebar tying machine 2, that is, before rotating the feed motor 50 (see Figure 4) to rotate the reel 33 and feed the wire W around the rebar R. In this embodiment, the control circuit board 36 detects that the detection switch 238 of the first detection unit 224 and the detection switch 238 of the third detection unit 228 are pressed down. Next, the control circuit board 36 uses the type of the pressed-down detection switch 238 and the type identification table to identify the type of reel 33. Since the arrangement and number of information units 170 differ depending on the type of reel 33, the pressed-down detection switch 238 differs depending on the type of reel 33. The type identification table shows the relationship between the type of pressed-down detection switch 238 and the type of reel 33. The type identification table is stored in the control circuit board 36. Finally, the control circuit board 36 sets the conditions for tying the wire W to the reinforcing bar R in the reinforcing bar tying machine 2 according to the type of reel 33 that has been identified.

[0105] Next, the operation of removing the reel 33 from the reel mounting section 192 will be explained. First, rotate the lock lever 32 (see Figure 1) to switch the main cover 28 to the open position. Next, remove the reel 33 from the reel mounting section 192. The first rib 186 separates from the first detection section 224, and the second rib 188 separates from the third detection section 228. As a result, the detection switch 238 returns to its initial position.

[0106] (effect) The rebar tying machine 2 includes a reel 33 having a bobbin 160 and wire W wound around the bobbin 160, a reel mounting section 192 for rotatably mounting the reel 33, a feeding section 38 for feeding the wire W wound around the bobbin 160 around the rebar R, a twisting section 46 for twisting the wire W around the rebar R, a type detection section 158 for detecting the type of reel 33, and a support section 15 for supporting the reel mounting section 192, the feeding section 38, the twisting section 46, and the type detection section 158. The type detection section 158 detects the type of reel 33 before the reel 33 is mounted on the reel mounting section 192 and before the reel 33 rotates.

[0107] According to the above configuration, the type of reel 33 is detected when the reel 33 is attached to the reel mounting section 192 and before the reel 33 rotates. The type of reel 33 can be detected without the reel tying machine 2 performing the operation of rotating the reel 33.

[0108] Furthermore, the rebar tying machine 2 includes a reel mounting section 192 for rotatably mounting a reel 33 having a bobbin 160 and wire W wound around the bobbin 160, a feeding section 38 for feeding the wire W wound around the bobbin 160 around the rebar R, a twisting section 46 for twisting the wire W around the rebar R, a type detection section 158 for detecting the type of reel 33, and a support section 15 for supporting the reel mounting section 192, the feeding section 38, the twisting section 46, and the type detection section 158. The type detection section 158 detects the type of reel 33 before the reel 33 is attached to the reel mounting section 192 and before the reel 33 rotates.

[0109] The above configuration can achieve the same effect as the rebar tying machine 2 described above.

[0110] Furthermore, the reel 33 is used by being rotatably attached to the reel mounting section 192 of the rebar tying machine 2. The reel 33 comprises a bobbin 160 having information sections 180 and 182 that hold type information indicating the type of reel 33, and a wire W wound around the bobbin 160. The information sections 180 and 182 are detected by the rebar tying machine 2 before the reel 33 is attached to the reel mounting section 192 and before the reel 33 rotates.

[0111] According to the above configuration, when the reel 33 is used in the rebar tying machine 2, type information indicating the type of reel 33 is detected before the reel 33 is attached to the reel mounting part 192 and before the reel 33 rotates. The rebar tying machine 2 can detect the type of reel 33 without having the rebar tying machine 2 perform the operation of rotating the reel 33.

[0112] Furthermore, the bobbin 160 includes a body portion 162 around which the wire W is wound, a flange portion 166 located at one end of the body portion 162, and information units 180 and 182 located on the flange portion 166 and holding type information indicating the type of reel 33. The type detection unit 158 ​​detects the type information from the information units 180 and 182 before the reel 33 is attached to the reel mounting portion 192 and before the reel 33 rotates.

[0113] With the above configuration, the type of reel 33 can be detected by a simple method of arranging the information units 180 and 182 in the flange portion 166.

[0114] Furthermore, the type detection unit 158 ​​includes a first detection unit 224 and a second detection unit 226. The information units 180 and 182 include a first information unit 180 which is detected by the first detection unit 224 of the first detection unit 224 and the second detection unit 226 before the reel 33 is attached to the reel mounting unit 192 and the reel 33 rotates.

[0115] According to the above configuration, the first information unit 180 is detected by the first detection unit 224. The type of reel 33 can be detected by a simple method that determines whether or not the first information unit 180 is detected by either the first detection unit 224 or the second detection unit 226.

[0116] Furthermore, the first information unit 180 may be a first rib 186 having an annular shape. The central axis of the first rib 186 is equal to the rotation axis AX of the reel 33.

[0117] According to the above configuration, since the central axis of the first rib 186 is equal to the rotation axis AX of the reel 33, the type of reel 33 can be detected regardless of the rotation angle of the reel 33 when it is attached to the reel mounting portion 192.

[0118] Furthermore, the first detection unit 224 is positioned further away from the rotation axis AX of the reel 33 than the second detection unit 226, with respect to the direction perpendicular to the rotation axis AX of the reel 33.

[0119] If the first detection unit 224 is positioned at the same location as the second detection unit 226 in a direction perpendicular to the rotation axis AX of the reel 33, then if the first information unit 180 is an annular rib 186, both the first detection unit 224 and the second detection unit 226 will misdetect the first information unit 180. Furthermore, if the first information unit 180 is a partially interrupted rib, the first detection unit 224 and the second detection unit 226 will misdetect the first information unit 180 depending on the rotation angle when the reel 33 is installed. With the above configuration, it is possible to suppress the misdetection of the first information unit 180 by the first detection unit 224 and the second detection unit 226.

[0120] Furthermore, the first detection unit 224 is equipped with a push-button switch that can be pressed by the first information unit 180.

[0121] According to the above configuration, the type of reel 33 can be detected using a simple configuration with a push-button switch.

[0122] Furthermore, the first detection unit 224 includes a detection switch 238 that detects when it has been pressed by the first information unit 180, and a cover member 240 that is positioned between the first information unit 180 and the detection switch 238 when it has been pressed by the first information unit 180.

[0123] With the above configuration, when the reel 33 rotates, the first information unit 180 can be prevented from sliding against the detection switch 238. This prevents the detection switch 238 from wearing down as the reel 33 rotates.

[0124] Furthermore, the reel mounting section 192 includes a turntable 204 that is rotatably supported by the support section 15. When the reel 33 is attached to the reel mounting section 192, the bobbin 160 is fixed to the turntable 204.

[0125] With the above configuration, since the turntable 204 is supported by the support part 15, it is not necessary to attach or detach the turntable 204 to the support part 15. This prevents the position of the rotation axis of the turntable 204 from shifting. As a result, it is possible to prevent the position of the rotation axis AX of the reel 33 from shifting.

[0126] (Correspondence) The first rib, number 186, is an example of a "rib".

[0127] (Second example) A second embodiment will be described with reference to the drawings. In the second embodiment, only the differences from the first embodiment will be described, and the same reference numerals will be used for parts that are the same as in the first embodiment, and their description will be omitted. As shown in Figure 26, in the second embodiment, the first detection unit 224, the second detection unit 226, and the third detection unit 228 of the type detection unit 158 ​​are further equipped with a torsion spring 352. The torsion spring 352 is fixed to the pressing member 242. The torsion spring 352 biases the pressing member 242 toward its initial position.

[0128] Next, the method for detecting the type of reel 33 will be explained. In the following, only the operation of pressing the detection switch 238 will be explained, and the explanation of the type detection process will be omitted. As shown in Figure 27, when the reel 33 is attached to the reel mounting portion 192, the first rib 186 comes into contact with the cover member 240 of the first detection unit 224, pushing the cover member 240 toward the detection switch 238 of the first detection unit 224. The detection switch 238 of the first detection unit 224 detects that the cover member 240 of the first detection unit 224 has been pressed. Also, the second rib 188 comes into contact with the cover member 240 of the third detection unit 228, pushing the cover member 240 toward the detection switch 238 of the third detection unit 228. The detection switch 238 of the third detection unit 228 detects that the cover member 240 of the third detection unit 228 has been pressed. As shown in Figure 25, in the first detection unit 224 and the third detection unit 228, as the cover member 240 is pressed in, the pressing member 242 rotates away from its initial position, bringing the spherical surface of the contact portion 250 into contact with the spherical surface of the contacted portion 246. When the contact position between the contact portion 250 and the contacted portion 246 reaches the midpoint 246a of the spherical surface of the contacted portion 246, it rotates toward the initial position. As shown in Figure 28, due to the biasing force of the torsion spring 352, the pressing member 242 returns to its initial position, bringing the spherical surface of the contact portion 250 into contact with the spherical surface of the contacted portion 246. When the pressing member 242 returns to its initial position, it moves the cover member 240 in the direction that the cover member 240 presses the detection switch 238. As shown in Figure 27, the first detection unit 224 is held in a state where the first rib 186 is not in contact with the cover member 240 and the detection switch 238 is pressed in, by the first rib 186, the pressing member 242, and the torsion spring 352. Similarly, the third detection unit 228 is held in a state where the second rib 188 is not in contact with the cover member 240 and the detection switch 238 is pressed in, by the second rib 188, the pressing member 242, and the torsion spring 352. On the other hand, even when the reel 33 is attached to the reel mounting part 192, the detection switch 238 of the second detection unit 226 is not pressed in.

[0129] Next, the operation of removing the reel 33 from the reel mounting section 192 will be described. First, the lock lever 32 (see Figure 1) is rotated to switch the main cover 28 to the open position. Next, the reel 33 is removed from the reel mounting section 192. The first rib 186 separates from the first detection section 224, and the second rib 188 separates from the third detection section 228. Also, when the control circuit board 36 detects that the main cover 28 is not in the closed state via the closed state detection sensor (not shown), it operates a return mechanism (not shown). The push member 242 is operated by the return mechanism and rotates away from its initial position. As the cover member 240 returns to its initial position, the detection switch 238 also returns to its initial position.

[0130] (effect) The first detection unit 224 further includes a pushing member 242 that pushes the cover member 240 to a position where the cover member 240 does not come into contact with the first information unit 180 when pushed by the first information unit 180.

[0131] With the above configuration, when the reel 33 rotates, the first information unit 180 can be prevented from sliding against the cover member 240. This prevents wear of the cover member 240 as the reel 33 rotates.

[0132] (Third embodiment) A third embodiment will be described with reference to the drawings. In the third embodiment, only the differences from the first embodiment will be described, and the same reference numerals will be used for parts that are the same as in the first embodiment, and their description will be omitted. As shown in Figure 29, in the third embodiment, the type detection unit 158 ​​includes a first detection unit 424, a second detection unit 426, and a third detection unit 428. The type detection unit 158 ​​does not include the first detection unit 224, the second detection unit 226, and the third detection unit 228 of the first embodiment.

[0133] The first detection unit 424, the second detection unit 426, and the third detection unit 428 are equipped with laser switches. The first detection unit 424, the second detection unit 426, and the third detection unit 428 are electrically connected to the control circuit board 36 (see Figure 3) by wiring (not shown). The first detection unit 424, the second detection unit 426, and the third detection unit 428 are fixed to the holder housing 26. The first detection unit 424 is positioned opposite the first through hole 230 of the holder housing 26. The second detection unit 426 is positioned opposite the second through hole 232 of the holder housing 26. The third detection unit 428 is positioned opposite the third through hole 234 of the holder housing 26. As shown in Figure 30, the first detection unit 424 is positioned further away from the rotation axis AX of the reel 33 than the turntable 204. The second detection unit 426 is positioned further away from the rotation axis AX of the reel 33 than the first detection unit 424. The third detection unit 428 is positioned further away from the rotation axis AX of the reel 33 than the second detection unit 426.

[0134] The first detection unit 424 includes an irradiation unit 430. The irradiation unit 430 is capable of irradiating a laser onto the detection object. The irradiation unit 430 is also capable of detecting the laser reflected from the detection object. When the reel 33 is attached to the reel mounting unit 192, the irradiation unit 430 is positioned opposite the first rib 186 of the reel 33.

[0135] The second detection unit 426 includes an irradiation unit 432. The irradiation unit 432 is capable of irradiating a laser onto the detection object. The irradiation unit 432 is also capable of detecting the laser reflected from the detection object. When the reel 33 is attached to the reel mounting unit 192, the irradiation unit 432 is positioned opposite the outer surface (right side) of the right flange 166 between the first rib 186 and the second rib 188. The distance between the irradiation unit 432 and the outer surface (right side) of the right flange 166 is longer than the distance between the irradiation unit 430 and the first rib 186.

[0136] The third detection unit 428 includes an irradiation unit 434. The irradiation unit 434 is capable of irradiating a laser onto the detection object. The irradiation unit 434 is also capable of detecting the laser reflected from the detection object. When the reel 33 is attached to the reel mounting unit 192, the irradiation unit 434 is positioned opposite the second rib 188. The distance between the irradiation unit 434 and the second rib 188 is equal to the distance between the irradiation unit 430 and the first rib 186.

[0137] Next, the method for detecting the type of reel 33 will be explained. When the reel 33 is attached to the reel mounting portion 192, the illumination portion 430 is positioned opposite the first rib 186 of the reel 33. The illumination portion 432 is positioned opposite the outer surface (right side) of the right flange portion 166 between the first rib 186 and the second rib 188. The illumination portion 434 is positioned opposite the second rib 188.

[0138] Next, the control circuit board 36 (see Figure 3) performs type detection processing. First, when the control circuit board 36 determines that the main cover 28 (see Figure 1) is closed, before performing the tying operation of the rebar tying machine 2, that is, before rotating the reel 33 by rotating the feed motor 50 (see Figure 4) to feed the wire W around the rebar R, the control circuit board 36 (see Figure 3) controls the irradiation units 430, 432, and 434 respectively to irradiate lasers from each of them. The laser irradiated from irradiation unit 430 is reflected by the first rib 186 and detected by irradiation unit 430. The laser irradiated from irradiation unit 432 is reflected by the outer surface (right side) of the right flange 166 and detected by irradiation unit 432. The laser irradiated from irradiation unit 434 is reflected by the second rib 188 and detected by irradiation unit 434.

[0139] Next, the control circuit board 36 determines the distance between the first detection unit 424 and the first rib 186 based on the period from when the laser is emitted from the irradiation unit 430 until the laser is detected by the irradiation unit 430. The control circuit board 36 also determines the distance between the second detection unit 426 and the outer surface (right side) of the right flange 166 based on the period from when the laser is emitted from the irradiation unit 432 until the laser is detected by the irradiation unit 432. Furthermore, the control circuit board 36 determines the distance between the third detection unit 428 and the second rib 188 based on the period from when the laser is emitted from the irradiation unit 434 until the laser is detected by the irradiation unit 434.

[0140] Next, the control circuit board 36 identifies the type of reel 33 using the distances and type identification tables identified for each of the first detection unit 424, second detection unit 426, and third detection unit 428. Since the arrangement and number of information units 170 differ depending on the type of reel 33, the distances identified for each of the first detection unit 424, second detection unit 426, and third detection unit 428 also differ depending on the type of reel 33. The type identification table shows the relationship between the distances identified by the first detection unit 424, second detection unit 426, and third detection unit 428 and the type of reel 33. The type identification table is stored in the control circuit board 36. Finally, the control circuit board 36 sets the conditions for tying the wire W to the reinforcing bar R in the reinforcing bar tying machine 2 according to the identified type of reel 33.

[0141] (effect) Furthermore, the first detection unit 424 is equipped with a laser switch for detecting the distance between it and the first information unit 180.

[0142] According to the above configuration, when the reel 33 is attached to the reel mounting portion 192, the first detection unit 424 does not come into contact with the first information unit 180. This makes it possible to suppress wear of the first detection unit 424 as the reel 33 rotates.

[0143] (modified version) In one embodiment, the number of information units 180 and 182 is not limited to two; it may be one or three or more. Similarly, the number of detection units 224, 226, and 228 is not limited to three; it may be two or fewer, or four or more.

[0144] In one embodiment, the information unit 170 may further include a third information unit. In this case, the third information unit may include a third rib having an annular shape. The third rib may be positioned opposite the second detection unit 226 when the reel 33 is attached to the reel mounting portion 192.

[0145] In one embodiment, the first information unit 180 may be positioned opposite the second detection unit 226 when the reel 33 is attached to the reel mounting portion 192. The second information unit 182 may also be positioned opposite the second detection unit 226 when the reel 33 is attached to the reel mounting portion 192.

[0146] In one embodiment, the control circuit board 36 may determine that the reel 33 has been attached to the reel mounting section 192 when at least one of the detection switches 238 of the first detection section 224, the second detection section 226, and the third detection section 228 is pressed (in the above embodiment, when the detection switches 238 of the first detection section 224 and the third detection section 228 are pressed), and then perform type detection processing. [Explanation of Symbols]

[0147] 2: Rebar tying machine 10: Reel holder 15: Support part 26: Holder Housing 26b: Containment space 28: Main cover 30: Auxiliary cover 30a: Auxiliary space 33: Reel 36: Control circuit board 38: Sending Department 40: Information department 44: Cutting section 46: Twisted part 158: Type detection unit 160: Bobbin 162: Torso 164: Left brim 166: Right guard section 168: Protrusion 170: Information Department 180: 1st Information Department 182:Second Information Department 186: First Rib 188: Second Rib 192: Reel mounting section 194: Left side reel mounting section 196: Right side reel mounting section 204: Turntable 208: Turntable body 208a:Reception Department 216: Magnetic sensor for rotation detection 218: Magnet for rotation detection 220: Sensor board 224: First detection unit 226: Second detection unit 228: Third detection unit 230: First through hole 232: Second through hole 234: Third through hole 238: Detection switch 240: Cover component 242: Push-in member 352: Torsion spring 424: First detection unit 426: Second detection unit 428: Third detection unit 430, 432, 434: Irradiation area AX: Rotation axis B: Battery pack R: Reinforcement bars W: wire

Claims

1. A reel comprising a bobbin and a wire wound around the bobbin, A reel mounting section for rotatably mounting the aforementioned reel, A feeding unit that feeds the wire wound on the bobbin around the reinforcing bar, A twisted portion that twists the wire around the reinforcing bar, A type detection unit for detecting the type of reel, It comprises the reel mounting portion, the feeding portion, the twisting portion, and a support portion that supports the type detection portion. The type detection unit detects the type of the reel before the reel rotates, in a rebar tying machine.

2. A reel mounting section for rotatably mounting a reel which comprises a bobbin and a wire wound around the bobbin, A feeding unit that feeds the wire wound on the bobbin around the reinforcing bar, A twisted portion that twists the wire around the reinforcing bar, A type detection unit for detecting the type of reel, It comprises the reel mounting portion, the feeding portion, the twisting portion, and a support portion that supports the type detection portion. The type detection unit detects the type of the reel before the reel rotates, in a rebar tying machine.

3. A reel comprising a bobbin and a wire wound around the bobbin, A reel mounting section for rotatably mounting the aforementioned reel, A feeding unit that feeds the wire wound on the bobbin around the reinforcing bar, A twisted portion that twists the wire around the reinforcing bar, A type detection unit for detecting the type of reel, The reel mounting portion, the feeding portion, the twisting portion, and the support portion that supports the type detection portion, A control unit configured to perform a type detection process to cause the type detection unit to detect the type of the reel, Switch 1 and A housing that defines a storage space for accommodating the aforementioned reel, The housing is equipped with a reel cover that is movably attached between a state in which the storage space is open and a state in which the storage space is closed. Before the reel rotates, the control unit, upon detecting a predetermined state via the first switch, executes the type detection process. The first switch is configured to detect whether the reel cover is in a closed state in the storage space. The control unit, before the reel rotates, detects via the first switch that the reel cover is closed to the storage space, and then executes the type detection process, in a rebar tying machine.

4. The type detection unit, A push-button type second switch, The device comprises a switch cover positioned between the second switch and the push element when the second switch is pressed by the push element, The type detection unit distinguishes and detects the type of the reel according to the pressed state of the second switch, as described in any one of claims 1 to 3.

5. The type detection unit distinguishes and detects the type of the reel according to at least one of the thickness of the wire, the presence or absence of a coating on the wire, and the presence or absence of plating on the wire, as described in any one of claims 1 to 3.

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