JP2017110473A - Reinforcement binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of further improving workability of attachment/detachment of a reel in a reinforcement binding machine.SOLUTION: The present specification discloses a reinforcement binding machine for binding a plurality of reinforcements with a wire. The reinforcement binding machine comprises a storage mechanism for detachably accommodating a reel around which the wire is wound and which has a bearing groove. The storage mechanism comprises a bearing member which has a tapered shape and the tip of which makes an entry into the bearing groove of the reel, and a biasing member for biasing the bearing member in the direction of bringing it closer to the bearing grove of the reel.SELECTED DRAWING: Figure 9

Description

  The technology disclosed in the present specification relates to a reinforcing bar binding machine.

  Patent Document 1 discloses a reinforcing bar binding machine that binds a plurality of reinforcing bars with wires. This reinforcing bar binding machine is a reel around which a wire is wound, and includes a receiving mechanism that detachably receives a reel having a bearing groove. The accommodation mechanism is a bearing member having a cylindrical shape, the bearing member engaging with the bearing groove of the reel, the urging member for urging the bearing member in the direction away from the bearing groove of the reel, and the bearing member of the reel. A lock mechanism is provided for locking in a state engaged with the bearing groove.

JP 2009-275488 A

  In the reinforcing bar binding machine of Patent Document 1, when a user attaches a reel to the receiving mechanism, an operation of inserting the reel into the receiving mechanism, an operation of engaging the bearing member with the bearing groove of the reel, and locking by the lock mechanism Therefore, the operation of attaching the reel is complicated. Further, when the user removes the reel from the storage mechanism, an operation of releasing the lock by the lock mechanism and an operation of taking out the reel from the storage mechanism are required, and the work of removing the reel is complicated. In a reinforcing bar binding machine, a technique that can further improve the workability of attaching and detaching a reel is expected.

  The present specification discloses a reinforcing bar binding machine that binds a plurality of reinforcing bars by wires. The reinforcing bar binding machine is a reel around which a wire is wound, and includes a receiving mechanism that detachably receives a reel having a bearing groove. The accommodation mechanism is a bearing member having a tapered shape, and includes a bearing member having a tip that enters the bearing groove of the reel, and a biasing member that biases the bearing member in a direction to approach the bearing groove of the reel.

  In the above-described reinforcing bar binding machine, when the user attaches the reel to the accommodation mechanism, only the operation of inserting the reel into the accommodation mechanism needs to be performed. That is, in the above-described reinforcing bar binding machine, when the reel is inserted into the accommodation mechanism, the tapered bearing member comes into contact with the outer edge of the reel, and the bearing member moves outward as the reel is inserted. When the bearing member and the bearing groove of the reel are aligned, the tip of the bearing member enters the bearing groove by the biasing force of the biasing member, and the bearing member engages with the edge of the bearing groove. As a result, the reel is attached to the accommodation mechanism. In the above-described reinforcing bar binding machine, when the user removes the reel from the accommodation mechanism, only the operation of taking out the reel from the accommodation mechanism may be performed. That is, in the above-described reinforcing bar binding machine, when the reel is taken out from the storage mechanism, the tapered bearing member comes into contact with the edge of the bearing groove of the reel, and the bearing member moves outward as the reel is taken out. When the reel is completely removed from the storage mechanism, the bearing member returns to the original position by the biasing force of the biasing member. Thus, according to the above-described reinforcing bar binding machine, the workability of attaching and detaching the reel can be further improved.

  The present specification also discloses another reinforcing bar binding machine for binding a plurality of reinforcing bars by wires. The rebar binding machine is capable of detachably holding a reel around which a wire is wound in a receiving position, and can rotate the reel so that the reel does not come out of the receiving position when the reel is received in the receiving position. And an automatic holding mechanism for automatically holding. According to this reinforcing bar binding machine, the workability of attaching and detaching the reel can be further improved.

  The present specification also discloses another reinforcing bar binding machine for binding a plurality of reinforcing bars by wires. The reinforcing bar binding machine includes a receiving unit that detachably accommodates a reel on which a wire is wound in a receiving position, a holding mechanism that rotatably holds the reel so that the reel is not removed from the receiving position, and the reel is in a receiving position. And an automatic release mechanism that automatically releases the holding when removed. According to this reinforcing bar binding machine, the workability of attaching and detaching the reel can be further improved.

It is a perspective view which shows the external appearance of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the internal structure of the binding machine main body 4 of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the external appearance of the feed mechanism 32 of the reinforcing bar binding machine 2 which concerns on an Example. It is sectional drawing which shows the internal structure of the binding machine main body 4 of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the internal structure of the binding machine main body 4 and the grip 6 of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the internal structure of the binding machine main body 4 of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the internal structure of the binding machine main body 4 of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the external appearance in the state which the cover 116 opened and the supporting member 100 closed of the reinforcing bar binding machine 2 which concerns on an Example. It is a perspective view which shows the external appearance in the state which the cover 116 opened and the support member 100 was opened by the slide switch 104 of the reinforcing bar binding machine 2 which concerns on an Example. It is sectional drawing in the state where the supporting member 100 of the accommodation mechanism 30 of the reinforcing bar binding machine 2 which concerns on an Example was closed. It is sectional drawing in the state in which the supporting member 100 of the accommodation mechanism 30 of the reinforcing bar binding machine 2 which concerns on an Example was opened. It is a perspective view which shows the state with which the supporting member 100 of the movable bearing 98 of the reinforcing bar binding machine 2 concerning an Example, the supporting member 100, the torsion spring 102, the slide switch 104, and the reel 10 was closed. It is a perspective view which shows the state which the support member 100 opened by the slide switch 104 of the movable bearing 98, the support member 100, the torsion spring 102, the slide switch 104, and the reel 10 of the reinforcing bar binding machine 2 according to the embodiment. It is a perspective view which shows the external appearance of the reel 10 in the reinforcing bar binding machine 2 which concerns on a modification. It is sectional drawing which shows the relationship between the ditch | groove 10e of the reel 10, the engaging claw 130, and the reel detector 136 in the reinforcing bar binding machine 2 which concerns on a modification. It is sectional drawing which shows the relationship between the outer edge of the reel 10, the engaging claw 130, and the reel detector 136 in the reinforcing bar binding machine 2 which concerns on a modification. It is sectional drawing which shows the relationship between the outer edge of the reel 10, the engaging claw 130, the holding wall 132, and the reel detector 136 in the reinforcing bar binding machine 2 which concerns on a modification. It is sectional drawing which shows the shape of the front-end | tip of the engaging claw 130 in the reinforcing bar binding machine 2 which concerns on a modification.

  In one or more embodiments, the reinforcing bar binding machine further includes a switch member operable by a user of the reinforcing bar binding machine, and when the switch member is operated, the bearing member moves away from the bearing groove of the reel. It may be configured to be.

  According to the above configuration, even when the movement of the bearing member is hindered due to foreign object biting or the like, and the insertion or removal of the reel becomes difficult, the user is forced to operate the switch member. The reel can be attached and detached by moving the bearing member.

  In one or more embodiments, the reinforcing bar binding machine includes a feed mechanism that feeds a wire from a reel of the accommodation mechanism, a feed mechanism cover that covers at least a part of the feed mechanism, and a storage mechanism that covers at least a part of the accommodation mechanism. A cover may be further provided, and the feed mechanism cover and the accommodation mechanism cover may be configured to open and close integrally.

  Normally, the reel attaching / detaching operation performed by the user with the housing mechanism cover opened and the wire setting operation performed by the user with the feeding mechanism cover opened are performed as a series of operations. If the storage mechanism cover and the feed mechanism cover are formed separately, the user must perform the opening / closing operation of the storage mechanism cover and the opening / closing operation of the feed mechanism cover when performing the above-described series of operations. Therefore, complicated work is required. By forming the accommodation mechanism cover and the feeding mechanism cover integrally as in the above configuration, the workability when performing the above series of operations can be further improved.

  The present specification includes a reel on which a wire is wound, and a torsion motor that twists the wire, feeds the wire from the reel, guides the wire around the plurality of reinforcing bars, and twists the wire around the plurality of reinforcing bars. Also disclosed is a reinforcing bar binding machine that binds a plurality of reinforcing bars by wires by twisting them. The reinforcing bar binding machine includes a housing plate, a reel state detector that detects a reel state, and a control board that receives a signal from the reel state detector and controls a torsion motor. The reel state detector is arranged on one side when viewed from the housing plate. The torsion motor is arranged on the other side when viewed from the housing plate. A part of the control board is disposed on one side when viewed from the housing plate, and another part of the control board is disposed on the other side when viewed from the housing plate. The reel state detector here may be any detector that detects the state of the reel, for example, a reel detector that detects whether the reel is housed in the housing position, A reel rotation detector for detecting the rotation of the reel is included. In this reinforcing bar binding machine, the connection between the reel state detector and the control board can be performed in the space on one side when viewed from the housing plate, and the connection between the torsion motor and the control board is viewed from the housing plate. Can be performed in the space on the other side. Since it is not necessary to pass wiring between one side and the other side of the housing plate, it is not necessary to provide a hole or a connection terminal for passing the wiring through the housing plate. Moreover, since it is not necessary to pass wiring between the one side and the other side of the housing plate, the assembly workability of the reinforcing bar binding machine can be improved.

(Example)
A reinforcing bar binding machine 2 according to an embodiment will be described with reference to the drawings. A reinforcing bar binding machine 2 shown in FIG. 1 is an electric tool for binding a plurality of reinforcing bars R with wires W.

  The reinforcing bar binding machine 2 includes a binding machine body 4, a grip 6 provided at a lower portion of the binding machine body 4, and a battery attachment portion 8 provided at a lower portion of the grip 6. A trigger 7 is provided at the front upper part of the grip 6. A battery B is detachably attached to the lower part of the battery attachment portion 8. The binding machine body 4, the grip 6, and the battery mounting portion 8 are integrally formed by combining the right outer housing 12 and the left outer housing 14. The binding machine body 4 includes an inner housing 16 between the right outer housing 12 and the left outer housing 14. The right outer housing 12, the left outer housing 14, and the inner housing 16 can be referred to as housing plates, respectively. A first operation display unit 18 is provided on the upper surface of the binding machine body 4. The first operation display unit 18 is provided with a main switch 20 that switches on / off the power of the reinforcing bar binding machine 2 and a main power LED 22 that displays the power on / off state of the reinforcing bar binding machine 2. A second operation display unit 24 is provided on the front upper surface of the battery mounting unit 8. The second operation display unit 24 is provided with a setting button 26 for setting the wire W feed amount and torsion strength and a display unit 28 for displaying the contents set by the setting button 26. The battery B, the trigger 7, the first operation display unit 18 and the second operation display unit 24 are connected to a control board 134 which will be described later.

  As shown in FIG. 2, the binding machine body 4 mainly includes an accommodation mechanism 30, a feed mechanism 32, a guide mechanism 34, a brake mechanism 36, a cutting mechanism 38 (see FIGS. 4 and 5), a torsion, and the like. A mechanism 40 and a control board 134 are provided. In FIG. 2, the right outer housing 12, the inner housing 16, a cover 116 (details will be described later), wiring inside the reinforcing bar binding machine 2, and the like are omitted for clarity of illustration. The control board 134 is disposed across the inner housing 16 at the lower center of the binding machine body 4. A part of the control board 134 is disposed on one side (the right outer housing 12 side) when viewed from the inner housing 16, and another part of the control board 134 is disposed on the other side (when viewed from the inner housing 16). (On the left outer housing 14 side).

  The accommodation mechanism 30 accommodates the reel 10 around which the wire W is wound. Details of the accommodation mechanism 30 will be described later.

  The feed mechanism 32 feeds the wire W supplied from the reel 10 of the storage mechanism 30 to the guide mechanism 34 in front of the binding machine body 4. The feed mechanism 32 includes a guide member 42, a base member 43, a feed motor 44, a main drive gear 46, a speed reduction mechanism 47, a driven gear 48, a release lever 50, a compression spring 52 (see FIG. 3), A lever holder 54 (see FIG. 3) and a fixed lever 56 are provided. The guide member 42 includes a tapered through hole 42a having a wide rear end and a narrow front end. The guide member 42 is fixed to the base member 43. The main driving gear 46 and the driven gear 48 are disposed in front of the guide member 42. The main driving gear 46 is connected to the feed motor 44 through a speed reduction mechanism 47 and rotates by driving the feed motor 44. The feed motor 44 is connected to the control board 134 by wiring (not shown). The control board 134 can control the operation of the feed motor 44. A V-shaped groove 46 a extending in the circumferential direction at the center in the height direction is formed on the side surface of the main driving gear 46. As shown in FIG. 3, the driven gear 48 is rotatably supported by the gear arm 50 a of the release lever 50. On the side surface of the driven gear 48, a V-shaped groove 48a extending in the circumferential direction at the center in the height direction is formed. The release lever 50 is a substantially L-shaped member including a gear arm 50a and an operation arm 50b. The release lever 50 is swingably supported by the base member 43 via the swing shaft 50c. The operation arm 50 b of the release lever 50 is connected to a spring receiving portion 54 a of the lever holder 54 via a compression spring 52. The lever holder 54 is sandwiched and fixed between the inner housing 16 and the left outer housing 14. The compression spring 52 biases the operation arm 50b in a direction away from the spring receiving portion 54a. During normal times, the biasing force of the compression spring 52 causes a torque in a direction that brings the driven gear 48 close to the main driving gear 46, and the driven gear 48 is pressed against the main driving gear 46. As a result, the teeth on the side surface of the driven gear 48 and the teeth on the side surface of the main driving gear 46 are engaged, and the wire W is formed between the V-shaped groove 46 a of the main driving gear 46 and the V-shaped groove 48 a of the driven gear 48. It is pinched. When the feed motor 44 rotates the main driving gear 46 in this state, the driven gear 48 rotates in the reverse direction, and the wire W sandwiched between the main driving gear 46 and the driven gear 48 is sent to the guide mechanism 34, and the reel The wire W is pulled out from 10.

  The fixed lever 56 is swingably supported by the lever holder 54 via the swing shaft 56a. The fixing lever 56 is urged in a direction in which it abuts on the operation arm 50b of the release lever 50 by a torsion spring (not shown). The fixing lever 56 is formed with a recess 56 b that engages with the tip of the operation arm 50 b of the release lever 50.

  When the user of the reinforcing bar binding machine 2 pushes the operation arm 50 b against the urging force of the compression spring 52, the release lever 50 swings around the swing shaft 50 c, and the driven gear 48 moves from the main drive gear 46. Get away. At this time, the fixed lever 56 is swung around the swing shaft 56a, and the tip of the operation arm 50b is engaged with the recess 56b, whereby the operation arm 50b is held in a pushed state. When setting the wire W extending from the reel 10 to the feed mechanism 32, the user pushes the operating arm 50b to separate the driven gear 48 from the main driving gear 46, and in this state, the tip of the wire W pulled out from the reel 10 Is disposed between the main driving gear 46 and the driven gear 48 through the through hole 42 a of the guide member 42. When the user swings the fixed lever 56 away from the operation arm 50b, the release lever 50 swings around the swing shaft 50c, and the driven gear 48 engages with the main driving gear 46. The wire W is sandwiched between the V-shaped groove 46 a of the main driving gear 46 and the V-shaped groove 48 a of the driven gear 48.

  The guide mechanism 34 shown in FIG. 2 guides the wire W sent from the feed mechanism 32 around the reinforcing bar R in an annular shape. The guide mechanism 34 includes a guide pipe 58, an upper curl guide 60, and a lower curl guide 62. The rear end portion of the guide pipe 58 is opened between the main driving gear 46 and the driven gear 48. The wire W sent from the feed mechanism 32 is fed into the guide pipe 58. The front end portion of the guide pipe 58 opens toward the inside of the upper curl guide 60. The upper curl guide 60 is provided with a first guide passage 64 for guiding the wire W sent from the guide pipe 58 and a second guide passage 66 for guiding the wire W sent from the lower curl guide 62. ing.

  As shown in FIG. 4, in the first guide passage 64, a plurality of guide pins 68 for guiding the wire W so as to wind the wire W downward, and a cutter constituting a part of a cutting mechanism 38 to be described later. 70 is provided. In FIG. 4, the wiring inside the reinforcing bar binding machine 2 is not shown for clarity of illustration. The wire W sent from the guide pipe 58 is guided by the guide pin 68 in the first guide passage 64, passes through the cutter 70, and is sent from the front end of the upper curl guide 60 toward the lower curl guide 62.

  A third guide passage 72 is provided in the lower curl guide 62. The third guide passage 72 includes a right guide wall 72 a and a left guide wall 72 b that guide the wire W sent from the front end of the upper curl guide 60. The wire W guided by the lower curl guide 62 is sent toward the rear end of the second guide passage 66 of the upper curl guide 60.

  As shown in FIG. 5, the wire W sent from the lower curl guide 62 is guided to the second guide passage 66 of the upper curl guide 60 and is directed from the front end of the upper curl guide 60 to the lower curl guide 62. An upper guide wall 74 is provided. In FIG. 5, for the sake of clarity of illustration, illustration of the left outer housing 14 and part of the wiring inside the reinforcing bar binding machine 2 is omitted.

  By the upper curl guide 60 and the lower curl guide 62, the wire W fed from the feed mechanism 32 is wound around the reinforcing bar R in an annular shape. When the feed mechanism 32 feeds the wire W by the feed amount of the wire W set by the user, the feed mechanism 32 stops the feed motor 44 and stops sending the wire W.

  The brake mechanism 36 shown in FIG. 2 stops the rotation of the reel 10 in conjunction with the feed mechanism 32 stopping the delivery of the wire W. The brake mechanism 36 includes a solenoid 76, a link 78, and a brake arm 80. The solenoid 76 of the brake mechanism 36 is connected to the control board 134 by wiring (not shown). The control board 134 can control the operation of the brake mechanism 36. In the reel 10, engaging portions 10a with which the brake arm 80 engages are formed at predetermined angular intervals in the radial direction. In a state where the solenoid 76 is not energized, the brake arm 80 is separated from the engaging portion 10 a of the reel 10. In a state where the solenoid 76 is energized, the brake arm 80 is engaged with the engaging portion 10 a of the reel 10 by the link 78. When the feed mechanism 32 feeds the wire W, the brake mechanism 36 separates the brake arm 80 from the engaging portion 10a of the reel 10 without energizing the solenoid 76. As a result, the reel 10 can freely rotate, and the feed mechanism 32 can draw the wire W from the reel 10. The brake mechanism 36 energizes the solenoid 76 to engage the brake arm 80 with the engaging portion 10 a of the reel 10 when the feeding mechanism 32 stops feeding the wire W. Thereby, the rotation of the reel 10 is prohibited. Thereby, even after the feeding mechanism 32 stops feeding the wire W, it is possible to prevent the reel 10 from continuing to rotate due to inertia and to loosen the wire W between the reel 10 and the feeding mechanism 32.

  The cutting mechanism 38 shown in FIG. 4 cuts the wire W in a state where the wire W is wound around the reinforcing bar R. The cutting mechanism 38 includes a cutter 70 and a link 82. The link 82 rotates the cutter 70 in conjunction with a torsion mechanism 40 described later. As the cutter 70 rotates, the wire W passing through the inside of the cutter 70 is cut.

  The twisting mechanism 40 shown in FIG. 5 binds the reinforcing bar R with the wire W by twisting the wire W wound around the reinforcing bar R. The torsion mechanism 40 includes a torsion motor 84, a speed reduction mechanism 86, a screw shaft 88 (see FIG. 4), a sleeve 90, and a pair of hooks 92.

  The rotation of the torsion motor 84 is transmitted to the screw shaft 88 via the speed reduction mechanism 86. The torsion motor 84 can rotate in the forward direction and the reverse direction, and the screw shaft 88 can also rotate in the forward direction and the reverse direction accordingly. The torsion motor 84 is connected to the control board 134 by wiring (not shown). The control board 134 can control the operation of the torsion motor 84. The sleeve 90 is disposed so as to cover the periphery of the screw shaft 88. In the state where the rotation of the sleeve 90 is prohibited, when the screw shaft 88 rotates in the forward direction, the sleeve 90 moves forward, and when the screw shaft 88 rotates in the reverse direction, the sleeve 90 moves backward. To do. Further, when the screw shaft 88 rotates in a state where the rotation of the sleeve 90 is allowed, the sleeve 90 rotates together with the screw shaft 88. When the sleeve 90 advances from the initial position to a predetermined position, the link 82 of the cutting mechanism 38 rotates the cutter 70. The pair of hooks 92 is provided at the front end of the sleeve 90 and opens and closes according to the position of the sleeve 90 in the front-rear direction. When the sleeve 90 moves forward, the pair of hooks 92 are closed and the wire W is gripped. On the other hand, when the sleeve 90 moves rearward, the pair of hooks 92 open and the wire W is released.

  The twisting mechanism 40 rotates the twisting motor 84 in a state where the wire W is wound around the reinforcing bar R. At this time, the rotation of the sleeve 90 is prohibited, and the rotation of the screw shaft 88 causes the sleeve 90 to advance and the pair of hooks 92 to advance, and the pair of hooks 92 close to grip the wire W. When the rotation of the sleeve 90 is permitted, the rotation of the screw shaft 88 causes the sleeve 90 to rotate and the pair of hooks 92 to rotate. Thereby, the wire W is twisted and the rebar R is bound. The torsional strength of the wire W can be set in advance by the user. The twisting mechanism 40 rotates the twisting motor 84 in the reverse direction when the wire W is twisted to the set twisting strength. At this time, the rotation of the sleeve 90 is prohibited, and the rotation of the screw shaft 88 causes the sleeve 90 to retreat and the pair of hooks 92 to retreat while being opened, thereby releasing the wire W. Thereafter, the pair of hooks 92 are retracted to the initial position, and the sleeve 90 is allowed to rotate, so that the pair of hooks 92 returns to the initial angle.

  As shown in FIG. 1, when the user arranges the reinforcing bar binding machine 2 so that a plurality of reinforcing bars R are positioned between the upper curl guide 60 and the lower curl guide 62 and pulls the trigger 7, The binding machine 2 winds the wire W around the reinforcing bar R by the feed mechanism 32, the guide mechanism 34 and the brake mechanism 36, and cuts the wire W by the cutting mechanism 38 and the twisting mechanism 40 to form the reinforcing bar R. A series of operations for twisting the wound wire W is executed.

  The accommodation mechanism 30 includes a fixed bearing 94 shown in FIG. 6, a reel rotation detection mechanism 96 shown in FIG. 7, a movable bearing 98 shown in FIG. 8, a support member 100, a torsion spring 102, and a slide switch 104. Yes. In FIG. 6, the right outer housing 12, the cover 116 (details will be described later), the reel 10 and the like are omitted for the sake of clarity. Further, in FIG. 7, for the sake of clarity of illustration, illustration of the left outer housing 14 and the wiring inside the reinforcing bar binding machine 2 is omitted.

  As shown in FIG. 6, the fixed bearing 94 is disposed in a space defined by the inner housing 16 and the right outer housing 12 (that is, a space in which the reel 10 is accommodated) in the binding machine body 4. The fixed bearing 94 is fixed to the inner housing 16. The fixed bearing 94 has a cylindrical outer shape. As shown in FIGS. 10 and 11, a cylindrical bearing groove 10 b is formed in the center of the surface of the reel 10 on the side facing the fixed bearing 94. The fixed bearing 94 engages with the bearing groove 10b of the reel 10 to support the reel 10 rotatably. Further, on the surface of the reel 10 facing the fixed bearing 94, rotation detecting convex portions 10d are formed at predetermined angular intervals in the radial direction.

  As shown in FIG. 7, the reel rotation detection mechanism 96 is provided in a space defined by the inner housing 16 and the left outer housing 14 in the binding machine body 4 (that is, a space different from the space in which the reel 10 is accommodated). Be placed. The reel rotation detection mechanism 96 includes a rotation detection lever 106, a torsion spring 108, and a magnetic sensor 110. The magnetic sensor 110 is connected to the control board 134 by wiring (not shown). A detection signal from the magnetic sensor 110 is input to the control board 134. The rotation detection lever 106 includes a contact arm 106a and a magnetic arm 106b. The rotation detection lever 106 is swingably supported by the inner housing 16 via a swing shaft 106c. The contact arm 106 a passes through the rotation detection hole 112 formed in the inner housing 16 and protrudes to a position where the contact arm 106 a interferes with the rotation detection convex portion 10 d of the reel 10. A permanent magnet 114 is provided on the magnetic arm 106b. The torsion spring 108 biases the rotation detection lever 106 in a direction in which the contact arm 106a protrudes from the rotation detection hole 112 to the reel 10 side. In a state where the rotation detection convex portion 10d of the reel 10 does not interfere with the contact arm 106a, the contact arm 106a protrudes from the rotation detection hole 112 by the biasing force of the torsion spring 108, and the permanent magnet 114 of the magnetic arm 106b is the magnetic sensor 110. It is arranged at a position close to In a state where the rotation detection convex portion 10d of the reel 10 interferes with the contact arm 106a, the contact arm 106a is pushed out from the rotation detection hole 112, the rotation detection lever 106 swings, and the permanent magnet 114 of the magnetic arm 106b is magnetized. It is arranged at a position away from the sensor 110. When the reel 10 housed in the housing mechanism 30 rotates, the contact and separation of the rotation detecting convex portion 10d and the contact arm 106a are repeated at a cycle according to the rotation speed of the reel 10, and the detection signal of the magnetic sensor 110 is detected. Changes. The reinforcing bar binding machine 2 can detect the rotation of the reel 10 accommodated in the accommodation mechanism 30 based on the detection signal of the magnetic sensor 110.

  As shown in FIG. 8, the movable bearing 98, the support member 100, the torsion spring 102, and the slide switch 104 are provided on the outer surface of the right outer housing 12. The right outer housing 12 is provided with a through hole 12a through which the movable bearing 98 can pass. As shown in FIGS. 10 to 13, the movable bearing 98 has a tapered shape in which the cross-sectional area decreases as it approaches the tip. In FIGS. 12 and 13, only the movable bearing 98, the support member 100, the torsion spring 102, the slide switch 104, and the reel 10 are illustrated for clarity of illustration. The movable bearing 98 of the present embodiment is formed in a truncated cone shape. A cylindrical bearing groove 10 c is formed in the center of the surface of the reel 10 on the side facing the movable bearing 98. The movable bearing 98 rotatably supports the reel 10 by engaging with the edge of the bearing groove 10 c of the reel 10.

  As shown in FIGS. 8, 9, 12, and 13, the support member 100 supports a movable bearing 98 at the tip. The base of the support member 100 is swingably supported by the right outer housing 12 via the swing shaft 100a. The support member 100 is attached to the direction in which the movable bearing 98 is brought closer to the fixed bearing 94 by the torsion spring 102 (corresponding to the direction in which the movable bearing 98 is brought closer to the bearing groove 10c of the reel 10 when the reel 10 is accommodated). It is energized. Hereinafter, the state in which the support member 100 is moved in the direction in which the movable bearing 98 is brought closer to the fixed bearing 94 is referred to as a state in which the support member 100 is closed, and the direction in which the movable bearing 98 is moved away from the fixed bearing 94 (the reel 10 is accommodated). In this state, the state in which the support member 100 is moved in the direction in which the movable bearing 98 is moved away from the bearing groove 10c of the reel 10) is referred to as the state in which the support member 100 is opened.

  The slide switch 104 is provided on the outer surface of the right outer housing 12 so as to be slidable in the front-rear direction. The slide switch 104 is slidable between a free position that allows the support member 100 to be freely opened and closed and an open position that forcibly opens the support member 100. The slide switch 104 can be operated by the user. The slide switch 104 is normally in a free position. When the slide switch 104 slides from the free position to the open position, the rib 104a of the slide switch 104 enters between the support member 100 and the right outer housing 12, and the support member 100 is pushed open. While the slide switch 104 is in the open position, the support member 100 remains open. When the slide switch 104 slides from the open position to the free position, the rib 104a of the slide switch 104 comes out between the support member 100 and the right outer housing 12, and the support member 100 is closed by the biasing force of the torsion spring 102.

  When attaching the reel 10 to the reinforcing bar binding machine 2, the user inserts the reel 10 into the space between the fixed bearing 94 and the movable bearing 98. At this time, the outer edge of the reel 10 comes into contact with the tapered surface of the movable bearing 98, and the support member 100 is pushed open together with the movable bearing 98 as the reel 10 is inserted. In this state, when the fixed bearing 94 is engaged with the bearing groove 10 b of the reel 10, the bearing groove 10 c of the reel 10 is aligned with the movable bearing 98, and the tip of the movable bearing 98 is the bearing by the biasing force of the torsion spring 102. The groove 10c enters and the movable bearing 98 engages with the edge of the bearing groove 10c. As a result, the reel 10 is accommodated in the accommodation mechanism 30.

  In a state where the reel 10 is attached to the reinforcing bar binding machine 2, the reel 10 is supported by the fixed bearing 94 and the movable bearing 98. When the wire W is pulled out from the reel 10 by the feed mechanism 32, the reel 10 slides with respect to the fixed bearing 94, and the reel 10 slides with respect to the movable bearing 98, so that the reel 10 rotates. The fixed bearing 94 may be rotatable with respect to the inner housing 16, and the reel 10 may be configured to rotate without sliding the reel 10 with respect to the fixed bearing 94. Alternatively, the movable bearing 98 may be a support member. The reel 10 may be configured to rotate with respect to the movable bearing 98 without being slid with respect to the movable bearing 98.

  When removing the reel 10 from the reinforcing bar binding machine 2, the user takes out the reel 10 from between the fixed bearing 94 and the movable bearing 98. At this time, since the tapered surface of the movable bearing 98 is in contact with the edge of the bearing groove 10 c of the reel 10, the support member 100 is pushed open together with the movable bearing 98 as the reel 10 is taken out. Thereby, the reel 10 can be taken out from the storage mechanism 30. When the reel 10 is completely removed from the accommodation mechanism 30, the movable bearing 98 and the support member 100 are returned to their original positions by the biasing force of the torsion spring 102.

  When removing the reel 10 from the reinforcing bar binding machine 2, the user may forcibly open the support member 100 by sliding the slide switch 104 from the free position to the open position. Thereby, the movable bearing 98 is separated from the bearing groove 10 c of the reel 10, and the user can smoothly take out the reel 10 from the storage mechanism 30.

  As shown in FIGS. 1, 8, and the like, a cover 116 is provided behind the binding machine body 4. The cover 116 is swingably attached to the left outer housing 14 via a swing shaft 116a. The cover 116 is urged in the opening direction by a torsion spring (not shown). As shown in FIG. 8, a rib 116 b is provided at the tip of the cover 116. A slide latch 117 is provided at a position corresponding to the rib 116 b of the right outer housing 12. The slide latch 117 is operable by the user, and is slidable between an engagement position that engages with the rib 116b and a release position that releases the engagement with the rib 116b. As shown in FIG. 1, when the cover 116 is closed and the slide latch 117 is slid to the engagement position, the slide latch 117 and the rib 116b are engaged to maintain the cover 116 closed. To do. As shown in FIG. 8, when the slide latch 117 is slid to the release position, the engagement between the slide latch 117 and the rib 116b is released, and the cover 116 is opened by the biasing force of the torsion spring.

  The cover 116 includes a housing mechanism cover 118 that covers the reel 10 of the housing mechanism 30, and a feeding mechanism cover 120 that covers the guide member 42, the main driving gear 46, and the driven gear 48 of the feeding mechanism 32. Covering the storage mechanism 30 with the storage mechanism cover 118 prevents the wire W from being loosened and detached from the reel 10, and prevents water, dust, sand, and the like from entering the storage mechanism 30 from the outside. it can. By covering the feed mechanism 32 with the feed mechanism cover 120, it is possible to prevent water, dust, sand, and the like from entering the feed mechanism 32 from the outside.

  In the reinforcing bar binding machine 2 of the present embodiment, the accommodation mechanism cover 118 and the feeding mechanism cover 120 are integrally formed as the cover 116. Normally, the reel 10 is attached / detached with the user opening the accommodation mechanism cover 118, and the wire W is set to the feeding mechanism 32 with the user opening the feeding mechanism cover 120. As done. If the housing mechanism cover 118 and the feeding mechanism cover 120 are formed separately, the user performs the opening / closing operation of the housing mechanism cover 118 and the opening / closing operation of the feeding mechanism cover 120 when performing the above-described series of operations. This must be done and requires cumbersome work. As in the case of the reinforcing bar binding machine 2 of the present embodiment, by integrally forming the accommodation mechanism cover 118 and the feeding mechanism cover 120, it is possible to further improve the workability when performing the above series of operations.

  The accommodation mechanism cover 118 is formed with a remaining amount confirmation window 122 through which the user can visually recognize the remaining amount of the wire W wound around the reel 10. By providing the remaining amount confirmation window 122, the user can confirm the remaining amount of the wire W even when the cover 116 is closed.

  The accommodation mechanism cover 118 and / or the feeding mechanism cover 120 may be formed of a transparent material. When the storage mechanism cover 118 is formed of a transparent material, the user can check the remaining amount of the wire W with the cover 116 closed without providing the remaining amount confirmation window 122. When the feed mechanism cover 120 is formed of a transparent material, the user can check the state of the feed mechanism 32 with the cover 116 closed.

  In the above embodiment, when the reel 10 is accommodated in the accommodation position by the movable bearing 98, the support member 100, and the torsion spring 102, the reel 10 can be automatically rotated so that the reel 10 does not come off the accommodation position. It can be said that an automatic holding mechanism for holding is configured. In the above-described embodiment, the movable bearing 98, the support member 100, and the torsion spring 102 are used to hold the reel 10 rotatably so that the reel 10 is not removed from the storage position. It can also be said that an automatic release mechanism that automatically releases the holding when removed from the vehicle is configured. However, such an automatic holding mechanism, a holding mechanism, and an automatic release mechanism may be embodied by other configurations.

  For example, as shown in FIG. 14, an annular concave groove 10e is formed on the side surface of the reel 10, and one extending from the binding machine body 4 as shown in FIGS. 15 (a) and 15 (b). Alternatively, an automatic holding mechanism, a holding mechanism, and an automatic releasing mechanism may be realized by automatically moving the plurality of engaging claws 130 back and forth. Such an engaging claw 130 may be provided on the inner housing 16 side of the binding machine body 4 or may be provided on the right outer housing 12 side.

  For example, a reel detector 136 that mechanically or magnetically detects that the reel 10 has been stored in the storage position is provided, and when the reel 10 is not stored in the storage position, FIG. As shown in FIG. 15B, when the engagement claw 130 is retracted to a position where it does not interfere with the reel 10 and the reel detector 136 detects that the reel 10 is accommodated in the accommodation position. As shown, the engaging claw 130 may be configured to advance to a position where it engages with the concave groove 10e. In this case, when the reel 10 rotates, the edge of the groove 10 e slides with the engaging claw 130. Therefore, the reel 10 is rotatably held by the engaging claw 130. Alternatively, when the shape of the outer edge of the side surface of the reel 10 is circular, the engaging claw 130 is provided as shown in FIGS. 16A and 16B without providing the concave groove 10e on the side surface of the reel 10. May be arranged at a position to engage with the outer edge of the side surface of the reel 10. Also in this case, when the reel 10 is not housed in the housing position, as shown in FIG. 16A, the engaging claw 130 is retracted to a position where it does not interfere with the reel 10, and the reel detector 136 When it is detected that the reel 10 is housed in the housing position, as shown in FIG. 16B, the engaging claw 130 is advanced to a position where it engages with the outer edge of the side surface of the reel 10. May be. Also in this case, when the reel 10 rotates, the outer edge of the side surface of the reel 10 slides with the engaging claw 130. Therefore, the reel 10 is rotatably held by the engaging claw 130. Alternatively, as shown in FIGS. 17A and 17B, a holding wall 132 that comes into contact with the reel 10 when the reel 10 is received in the receiving position is formed, and the holding wall 132 and the engaging claw 130 are formed. The reel 10 may be held rotatably. Also in this case, when the reel 10 is not housed in the housing position, as shown in FIG. 17A, the engaging claw 130 is moved backward to a position where it does not interfere with the reel 10, and the reel detector 136 When it is detected that the reel 10 is stored in the storage position, as shown in FIG. 17B, the engaging claw 130 is advanced to a position where it engages with the outer edge of the side surface of the reel 10. May be. In this case, when the reel 10 rotates, the outer edge of the side surface of the reel 10 slides with the engaging claw 130, and the outer edge of the side surface of the reel 10 slides with the holding wall. Therefore, the reel 10 is rotatably held by the engaging claw 130 and the holding wall 132.

  The configuration in which the engaging claw 130 automatically advances and retracts in this way is, for example, a contact type or non-contact type reel detector 136 and an actuator (not shown) that advances and retracts the engaging claw 130 according to the output of the sensor. ) Can be realized. Alternatively, the configuration in which the engaging claw 130 automatically advances and retracts in this way is a machine that causes the engaging claw 130 to advance by contact with the reel 10 when the reel 10 is received in the receiving position as the reel detector 136. This can also be realized by providing a typical link mechanism (not shown). In the above configuration, when the reel 10 is removed, it is necessary to separately provide a retracting mechanism (not shown) for manually retracting the engaging claw 130.

  The reel detector 136 as described above may be connected to the control board 134 via a wiring (not shown). In this case, the signal detected by the reel detector 136 is input to the control board 134. In this embodiment, the control board 134 is disposed across the inner housing 16, a part of the control board 134 is disposed on one side as viewed from the inner housing 16, and another part of the control board 134. Is disposed on the other side as viewed from the inner housing 16. Therefore, even when the reel detector 136 is disposed on one side (right outer housing 12 side) when viewed from the inner housing 16, it is disposed on the other side (left outer housing side) when viewed from the inner housing 16. Even in this case, the connection work between the reel detector 136 and the control board 134 can be easily performed. It is not necessary to provide a hole or a connection terminal for passing the wiring between the reel detector 136 and the control board 134 in the inner housing 16. Moreover, since it is not necessary to pass wiring between the one side and the other side of the inner housing 16, the assembling workability of the reinforcing bar binding machine 2 can be improved. The same applies to the wiring between the reel rotation detection mechanism 96 and the control board 134. Even when the reel rotation detection mechanism 96 is arranged on one side (right outer housing 12 side) as viewed from the inner housing 16, the inner rotation detection mechanism 96 is arranged on the inner side. Even when it is arranged on the other side (left outer housing side) when viewed from the housing 16, the connection work between the reel rotation detection mechanism 96 and the control board 134 can be easily performed. In the reinforcing bar binding machine 2 of the present embodiment, the feed motor 44 of the feed mechanism 32 and the solenoid 76 of the brake mechanism 36 are arranged on one side (the right outer housing 12 side) when viewed from the inner housing 16. The torsion motor 84 of the torsion mechanism 40 is disposed on the other side (left outer housing 14 side) when viewed from the inner housing 16. The same applies to the connection work between them and the control board 134.

  As shown in FIG. 18, the tip of the engaging claw 130 is tapered, and the engaging claw 130 is advanced to a position where it engages with the concave groove 10e of the reel 10 or the outer edge of the side surface by a biasing mechanism (not shown). You may comprise as follows. In this case, when the reel 10 is not accommodated in the accommodation position, the engaging claw 130 has advanced to a position where it interferes with the reel 10. When the reel 10 is inserted from this state, the engaging claw 130 is retracted by contact with the reel 10, and when the reel 10 is received in the receiving position, the engaging claw 130 is advanced by the urging force of the urging mechanism. Then, the engaging claw 130 engages with the concave groove 10e of the reel 10 and the outer edge of the side surface, and the reel 10 is rotatably held. On the contrary, when the reel 10 is removed from the storage position, the engaging claw 130 is retracted by contact with the groove 10e of the reel 10 or the outer edge of the side surface, and when the reel 10 is removed from the storage position, Due to the urging force, the engaging claw 130 advances again and returns to its original state. In addition, as a shape of the front-end | tip of the engagement nail | claw 130, a taper shape may be formed only in the side contact | abutted with the reel 10 when attaching the reel 10, or the side contact | abutted with the reel 10 when removing the reel 10 Only a taper shape may be formed.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

2: Reinforcing bar binding machine 4: Bundling machine main body 6: Grip 7: Trigger 8: Battery mounting part 10: Reel 10a: Engaging part 10b: Bearing groove 10c: Bearing groove 10d: Convex part 10e for rotation detection: Concave groove 12: Right outer housing 12a: Through hole 14: Left outer housing 16: Inner housing 18: First operation display unit 20: Main switch 22: Main power LED
24: second operation display unit 26: setting button 28: display unit 30: accommodation mechanism 32: feed mechanism 34: guide mechanism 36: brake mechanism 38: cutting mechanism 40: twist mechanism 42: guide member 42a: through hole 43: base Member 44: Feed motor 46: Main drive gear 46a: V-shaped groove 47: Reduction mechanism 48: Drive gear 48a: V-shaped groove 50: Release lever 50a: Gear arm 50b: Operation arm 50c: Oscillating shaft 52: Compression spring 54 : Lever holder 54a: Spring receiving portion 56: Fixed lever 56a: Oscillating shaft 56b: Recessed portion 56a: Oscillating shaft 58: Guide pipe 60: Upper curl guide 62: Lower curl guide 64: First guide passage 66: Second Guide passage 68: Guide pin 70: Cutter 72: Third guide passage 72a: Right guide wall 72b: Left guide wall 74: Upper plan Inner wall 76: Solenoid 78: Link 80: Brake arm 82: Link 84: Torsion motor 86: Reduction mechanism 88: Screw shaft 90: Sleeve 92: Hook 94: Fixed bearing 96: Reel rotation detection mechanism 98: Movable bearing 100: Support member 100a: oscillating shaft 102: torsion spring 104: slide switch 104a: rib 106: rotation detection lever 106a: contact arm 106b: magnetic arm 106c: oscillating shaft 108: torsion spring 110: magnetic sensor 112: rotation detection hole 114: permanent Magnet 116: Cover 116a: Oscillating shaft 116b: Rib 117: Slide latch 118: Storage mechanism cover 120: Feed mechanism cover 122: Remaining amount confirmation window 130: Engaging claw 132: Holding wall 134: Control board 136: Reel detector

Claims (5)

A rebar binding machine that binds multiple rebars with wires,
A reel around which the wire is wound, the reel having a bearing groove is detachably accommodated;
The accommodation mechanism is
A bearing member having a tapered shape, a bearing member having a tip that enters the bearing groove of the reel;
A reinforcing bar binding machine comprising an urging member for urging the bearing member in a direction approaching the bearing groove of the reel. It further comprises a switch member that can be operated by a user of the reinforcing bar binding machine,
The reinforcing bar binding machine according to claim 1, wherein when the switch member is operated, the bearing member is moved away from the bearing groove of the reel. A feed mechanism for feeding the wire from the reel of the storage mechanism;
A feed mechanism cover covering at least a part of the feed mechanism;
A storage mechanism cover for covering at least a part of the storage mechanism;
The reinforcing bar binding machine according to claim 1 or 2, wherein the feed mechanism cover and the accommodation mechanism cover are integrally opened and closed. A rebar binding machine that binds multiple rebars with wires,
An accommodating portion for detachably accommodating the reel around which the wire is wound in an accommodating position;
A reinforcing bar binding machine comprising: an automatic holding mechanism that automatically holds the reel so as to be rotatable so that the reel does not come out of the receiving position when the reel is received in the receiving position. A rebar binding machine that binds multiple rebars with wires,
An accommodating portion for detachably accommodating the reel around which the wire is wound in an accommodating position;
A holding mechanism that rotatably holds the reel so that the reel does not come off the storage position;
And an automatic release mechanism that automatically releases the reel when the reel is removed from the storage position.

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