JP2008291642A - Reinforcing bar binder, wire reel and identification method for wire reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive reinforcing-bar binder of a simple structure, which surely identifies a type of a wire reel and can automatically adjust a feeding quantity of the wire wound around the wire reel or a torsional torque. <P>SOLUTION: The reinforcing-bar binder 1 feeds a wire 8 by rotating the wire reel 30 loaded in a storage chamber 70 to bind reinforcing bars 3. The storage chamber 70 includes a first detecting means 80 for detecting a rotation quantity of the wire reel 30 and a second detecting means 25 for detecting the number of the second detected part 53 of the wire reel 30 over the rotation quantity detected by the first detecting means 80. The binder body 2 is provided with a control means for controlling the feeding quantity of the wire 8 and the torsional torque of the wire 8 according to the number of the second detected part 53 detected by the second detecting means 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention identifies a type of wire reel and identifies a reinforcing bar binding machine that automatically adjusts the feed amount of the wire wound around the wire reel or the twisting torque of the wire, and the wire reel and wire reel used in the rebar binding machine. Regarding the method.

In the conventional reinforcing bar binding machine, the wire reel with the wire wound around the rear is held, and when the switch is turned on and the trigger is operated, the wire is pulled out from the wire reel by the wire feeder and fed forward, and the tip of the guide arm is curved After the wire is drawn out from the part in a loop shape and the rebar is wound around, a part of the loop is gripped by a torsion hook and twisted and rotated to bind the rebar. As a means for automatically adjusting the twisting torque of the wire of this reinforcing bar binding machine, a display means for displaying the type of wire is provided on the side surface of the wire reel, and the detecting means provided on the reinforcing bar binding machine is detected and detected. There is one that identifies the type of wire based on the result detected by the means and automatically adjusts the torsion torque (for example, Patent Document 1).
Japanese Patent No. 3050369

  In the conventional reinforcing bar binding machine, the display means is composed of a reflective seal, the detection means is composed of a plurality of photo sensors, and one of the plurality of photo sensors detects the reflective seal provided on the side surface of the wire reel. However, since multiple types of photosensors are required, the structure is complicated and expensive, and the photo that should be detected by the rotational speed of the wire reel, disturbance light, etc. In some rare cases, other photosensors, rather than the sensors, detect the reflective seal and cause malfunctions.

  The present invention has been devised in view of the above-mentioned problems, has a simple structure and is inexpensive, reliably identifies the type of wire reel, and feed amount or torsion torque of the wire wound around the wire reel. It is a first object of the present invention to provide a reinforcing bar binding machine that can automatically adjust the angle. A second object is to provide a wire reel used in the reinforcing bar binding machine. A third object is to provide a method for reliably identifying a wire reel.

  In order to achieve the first object, a reinforcing bar binding machine according to claim 1 of the present application is equipped with a wire reel wound with a reinforcing bar binding wire in a storage chamber provided in a binding machine body, and the wire is connected to the reinforcing bar. In the rebar binding machine for twisting and binding the rebar after being wound around the periphery, the storage chamber has a first detection means for detecting the amount of rotation of the wire reel, and a second object of the wire reel. Second detection means for detecting the number of detection units is provided.

  In order to achieve the first object, a reinforcing bar binding machine according to claim 2 of the present application is equipped with a wire reel around which a wire for reinforcing bar binding is wound in a storage chamber provided in a binding machine body, In a reinforcing bar binding machine that feeds a wire while rotating it, winds the wire around a reinforcing bar, and then twists the reinforcing bar to bind the reinforcing bar, the storage chamber has a first detecting amount of rotation of the wire reel. Detection means and second detection means for detecting the number of second detected parts of the wire reel between the rotation amounts detected by the first detection means are provided. Control means is provided for controlling the wire feed amount or the wire twisting torque according to the number of second detected parts detected by the detecting means.

  In the reinforcing bar binding machine according to claim 3 of the present application, in order to achieve the first object, the rotation amount of the wire reel is determined by detecting the first detected portion of the wire reel by the first detecting means. Detected.

  In the reinforcing bar binding machine according to claim 4 of the present application, in order to achieve the first object, the first detection means is a contact sensor, and the first detected portion is a convex portion detected by the contact sensor. Or it is a recessed part, a 2nd detection means is a non-contact-type sensor, and a 2nd detected part is a mark detected by a non-contact-type sensor.

  In order to achieve the second object, a wire reel according to claim 5 of the present application is equipped with a wire reel in which a wire for binding reinforcing bars is wound in a storage chamber provided in a binding machine body, and the wire is attached to the reinforcing bar. A wire reel used in a reinforcing bar binding machine that twists after winding around and binds the reinforcing bars, and the reel body has a first detected portion that is detected by the first detecting means of the reinforcing bar binding machine. And the 2nd to-be-detected part detected by the 2nd detection means of a reinforcing bar binding machine is provided.

  In order to achieve the second object, the wire reel according to claim 6 of the present application detects the amount of rotation of the wire reel by detecting the first detected portion by the first detecting means, and the second reel The type of the wire reel is identified by detecting the detected portion by the second detection means.

  In the wire reel according to claim 7 of the present invention, in order to achieve the second object, the first detection means is a contact sensor, and the first detected portion is a convex portion detected by the contact sensor or The second detection means is a non-contact sensor, and the second detected part is a mark detected by the non-contact sensor.

  In order to achieve the third object, a wire reel identification method according to claim 8 of the present application is configured such that a wire reel around which a wire for reinforcing bar binding is wound is mounted in a storage chamber provided in a binding machine main body, and the wire A wire reel identification method used in a reinforcing bar binding machine that feeds a wire while rotating the reel, twists the wire around the reinforcing bar, and then binds the reinforcing bar. The number of detected parts provided on the wire reel is detected between the detected amounts of rotation of the wire reel, and the type of the wire reel is identified.

  In order to achieve the third object, the wire reel identifying method according to claim 9 of the present application adjusts the wire feed amount or the wire twisting torque in accordance with the identified type of the wire reel.

In order to achieve the third object, the wire reel identification method according to claim 10 of the present application is configured such that a wire reel wound with a wire for binding reinforcing bars is mounted in a storage chamber provided in a binding machine body, and the wire A wire reel identification method used in a reinforcing bar binding machine that feeds a wire while rotating a reel, twists the wire around a reinforcing bar and binds the reinforcing bar, and is provided on the reel body The first detection means detects the rotation amount of the wire reel by detecting the first detection portion, and the second detection portion of the second detection portion provided in the reel body is detected between the detected rotation amounts of the wire reel. The type of the wire reel is identified by detecting the number by the second detection means.

  In the wire reel identification method according to claim 11 of the present application, in order to achieve the third object, the first detection means is a contact sensor, and the first detected portion is detected by the contact sensor. The second detection means is a non-contact sensor, and the second detected part is a mark detected by the non-contact sensor.

  In the reinforcing bar binding machine according to the present invention, the first detecting means detects the amount of rotation of the wire reel, and the second detecting means detects the number of detected portions of the wire reel, thereby identifying the type of the wire reel. In addition, the feed amount of the wire wound around the wire reel or the twisting torque of the wire can be controlled. In particular, the amount of rotation of the wire reel is detected by causing the first detection unit to detect the first detected portion of the wire reel, and the first detected portion is a convex portion or a concave portion. There is an effect that the first detection unit can be reliably detected by using the first detection means as a contact sensor.

  The wire reel used in the reinforcing bar binding machine according to the present invention includes a first detected portion detected by the first detecting means of the reinforcing bar binding machine and a second detected by the second detecting means of the reinforcing bar binding machine. When the first detection unit is detected by the first detection unit, the rotation amount of the first detection unit is detected, and when the second detection unit is detected by the second detection unit. This has the effect of identifying the type. In particular, if the first detected part is a convex part or a concave part detected by a contact sensor, and the second detected part is a mark detected by a non-contact sensor, the type can be reliably identified. There is an effect that. In addition, there is an effect that the user can determine the type of the wire reel only by looking at the form (for example, the number of marks) of the second detected portion of the wire reel.

  The wire reel identification method used in the reinforcing bar binding machine according to the present invention detects the amount of rotation of the wire reel and detects the number of detected portions provided on the wire reel between the detected amounts of rotation of the wire reel. Thus, since the type of the wire reel is identified, the wire reel rotation speed and the operation time of the wire reel are unnecessary as elements for identifying the wire reel. Therefore, the wire reel can be identified even if the rotation speed of the wire reel is too slow or too fast. Further, since it is not necessary to detect how many detected parts are present within the wire reel driving time, the identification is assured. When the type of the wire reel is identified, there is an effect that the feed amount of the wire or the twisting torque of the wire can be automatically adjusted, and there is no need to manually adjust the wire reel.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view showing an outline of a reinforcing bar binding machine according to the present invention. FIG. 2 is a perspective view of the reinforcing bar binding machine with the cover removed. FIG. 3 is a top view of the reinforcing bar binding machine with the cover removed. FIG. 4 is a top cross-sectional view of the reinforcing bar binding machine with the cover removed. FIG. 5 is a right side view of the reinforcing bar binding machine with the cover removed. FIG. 6 is a rear sectional view of the reinforcing bar binding machine with the cover attached. FIG. 7 is a perspective view of the reinforcing bar binding machine with the wire reel of FIG. 2 removed. FIG. 8 is a top view of the reinforcing bar binding machine with the wire reel of FIG. 3 removed. FIG. 9 is a top sectional view of the reinforcing bar binding machine with the wire reel of FIG. 4 removed. FIG. 10 is an explanatory view showing a state where a cover is attached. FIG. 11 is a right side view of the reinforcing bar binding machine with the wire reel of FIG. 5 removed. FIG. 12 is a rear sectional view of the reinforcing bar binding machine with the wire reel of FIG. 6 removed. FIG. 13 is a left side view of the reinforcing bar binding machine. FIG. 14 is a left side sectional view of the reinforcing bar binding machine. FIG. 15 is a perspective view of the wire reel. 16A and 16B are explanatory diagrams of the wire reel, in which FIG. 16A is a front view of the wire reel, FIG. 16B is a sectional view taken along line AA in FIG. 16A, and FIG. It is. FIGS. 17A and 17B are explanatory views of the wire reel, in which FIG. 17A is a rear view of the wire reel, FIG. 17B is a side view of the wire reel, and FIG. FIG. 18 is an explanatory diagram of a wire reel mounted state. FIG. 19 is a flowchart showing the operation of the reinforcing bar binding machine.

As shown in FIGS. 1 and 2, the reinforcing bar binding machine 1 is mounted with a wire reel 30 around which a reinforcing bar binding wire 8 is wound in a storage chamber 70 provided in the binding machine body 2, and the wire reel 30 is rotated. Then, the wire 8 is fed out, wound around the reinforcing bar 3 and then twisted to bind the reinforcing bar 3. As shown in FIG. 7, the storage chamber 70 has a first detection means 80 for detecting the amount of rotation of the wire reel 30 and a wire reel 30 between the amount of rotation detected by the first detection means 80. And second detection means 25 for detecting the number of second detected parts 53. The binding machine body 2 is provided with control means for controlling the feed amount of the wire 8 or the twisting torque of the wire 8 according to the number of the second detected parts 53 detected by the second detection means 25.

  The amount of rotation of the wire reel 30 is detected by detecting the first detected portion 65 of the wire reel 30 by the first detecting means 80 as shown in FIG. The first detection means 80 is a contact type sensor, the first detected part 65 is a convex part or a concave part detected by the contact type sensor 80, and the second detection means 25 is a non-contact type sensor. The second detected portion 53 may be a mark detected by the non-contact sensor 25.

  As shown in FIG. 2, the wire reel 30 is provided with a wire reel 30 around which a reinforcing bar binding wire 8 is wound in a storage chamber 70 provided in the binding machine body 2, and the wire 8 is placed around the reinforcing bar 3. It is used for the reinforcing bar binding machine 1 that twists after winding and binds the reinforcing bars 3. As shown in FIG. 15, the reel body 30 a is detected by the first detection unit 65 detected by the first detection means 80 of the reinforcing bar binding machine 1 and the second detection means 25 of the reinforcing bar binding machine 1. A second detected portion 53 is provided.

  The rotation amount of the wire reel 30 is detected by the first detection unit 65 being detected by the first detection unit 80, and the second detection unit 53 is detected by the second detection unit 25. This type is identified. The first detection means 80 is a contact type sensor, the first detected part 65 is a convex part or a concave part detected by the contact type sensor 80, and the second detection means 25 is a non-contact type sensor. Thus, the second detected portion 53 may be a mark detected by the non-contact sensor 25.

  As shown in FIG. 7, the wire reel 30 is identified by mounting the wire reel 30 around which the reinforcing bar binding wire 8 is wound in the storage chamber 70 provided in the binding machine body 2, and rotating the wire reel 30. The wire 8 is fed out while being wound, and the wire 8 is wound around the reinforcing bar 3 and then twisted to bind the reinforcing bar 3, which is a method used in the reinforcing bar binding machine 1. The first detection means 80 detects one detected portion 65 to detect the amount of rotation of the wire reel 30, and the second amount provided in the reel body 30 a between the detected amount of rotation of the wire reel 30. The type of the wire reel 30 is identified by the second detection means 25 detecting the number of the detected parts 53.

  The method for identifying the wire reel 30 can adjust the feed amount of the wire 8 or the torsional torque of the wire 8 according to the type of the identified wire reel 30. The first detection means 80 is a contact type sensor, the first detected part 65 is a convex part or a concave part detected by the contact type sensor 80, and the second detection means 25 is a non-contact type sensor. The second detected portion 53 may be a mark detected by the non-contact sensor 25.

  The reinforcing bar binding machine 1 will be described in detail. As shown in FIG. 1, the reinforcing bar binding machine 1 is formed with a pair of abutting plate portions 5 applied to the reinforcing bars 3 at a lower portion of the front end portion directed to the reinforcing bar 3 of the binding machine body 2. In the middle, a twisting hook 7 having a wire insertion groove 6 at the tip is disposed. The twisting hook 7 can be rotated by an electric motor 9. The twisting hook 7 has the wire insertion groove 6 parallel to the loop-shaped wire 8 so that the wire 8 bent in the loop shape can be easily inserted into the wire insertion groove 6 during standby before the electric motor 9 starts to rotate. And is waiting at a position away from the wire 8.

  The twisting hook 7 is held by the electric motor 9 via the advance / retreat mechanism 10. The advancing / retracting mechanism 10 is constituted by, for example, a cam mechanism or the like, and the wire 8 is inserted into the wire insertion groove 6 of the twisting hook 7 when the electric motor 9 starts to rotate, and when the electric motor 9 stops rotating, the twisting hook 7 is placed in the standby position. Retreat to. That is, when the trigger 11 is pulled and the electric motor 9 starts rotating, the twisting hook 7 extends to the wire 8 side, inserts the wire 8 into the wire insertion groove 6, stops after a predetermined rotation, and returns to the original state. Return to the standby position.

  The binding machine body 2 is provided with a wire passage 12 through which the wire 8 is passed. The wire passage 12 is formed from the rear end portion of the binding machine main body 2 to the guide portion 15 for attaching the winding rod. The guide portion 15 is curved in an arc shape, and the wire passage 12 is a groove having an open arc inside the guide portion 15. A gear 17 attached to the output shaft of the motor 16 is disposed in the middle portion of the binding machine body 2 in the wire passage 12. The gear 17 faces an opening (not shown) provided in the wire passage 12, and the gear 17 presses the wire 8 against the bottom of the wire passage 12. The motor 16 and the gear 17 constitute a wire 8 feeding device, and the wire 8 is fed forward by the normal rotation of the motor 16.

  When the microswitch 20 is turned on by the trigger 11, the motor 16 rotates and the wire feed gear 17 rotates. By the rotation of the wire feed gear 17, the wire 8 wound around the wire reel 30 accommodated in the accommodation chamber 70 is sent to the front of the binding machine body 2 through the wire passage 12 in the guide portion 15. The motor 16 is controlled to rotate in the forward and reverse directions by a control circuit (not shown) built in the binding machine body 2 and, for example, the wire 8 is wound around the reinforcing bar 3 in a loop shape, and then the wire 8 is turned to the wire reel 30. It is also possible to reduce the looseness of the wire 8 by pulling toward the storage chamber 70 side.

  A wire gripping and cutting means 21 is disposed at a portion where the wire passage 12 reaches the guide portion 15. The wire gripping / cutting means 21 includes, for example, a pair of gripping portions and a pair of cutting blades, and the wire 8 passes between the pair of gripping portions and between the pair of cutting blades. When the feed amount of the wire 8 reaches a predetermined amount based on the rotation amount of the motor 16, the wire gripping and cutting means 21 crosses the pair of cutting blades and intersects to cut the wire 8. Then, the end of the wire 8 is gripped by the pair of gripping portions, and the wire 8 in which the reinforcing bar 3 is wound in a loop shape has the rear end of the loop gripped by the pair of gripping portions, and the twisting hook 7 And the rebar 3 is bound.

  A storage chamber 70 for storing the wire reel 30 around which the wire 8 is wound is formed at the rear portion of the binding machine body 2. Before describing the storage chamber 70, the wire reel 30 will be described with reference to FIGS. The wire reel 30 is made of a plastic such as ABS resin, polyethylene, or polypropylene having excellent resistance to abrasion or bending, and is made of a black plastic so that ambient light does not enter the hub portion 31. The wire reel 30 includes a hub portion 31 around which the wire 8 is wound, and disk-shaped flanges 32 and 33 provided on both sides of the hub portion 31. The hub portion 31 is formed in a cylindrical shape, and is integrally formed with a pair of flanges 32 and 33. An engaging claw 34 is formed on the outer periphery of one flange 32.

  An inner cylinder 40 having substantially the same axis as the hub portion 31 is formed in the center portion of the hub portion 31, and a mounting hole 45 into which the reel mounting shaft 23 of the reinforcing bar binding machine 1 is inserted is formed inside the inner tube 40. Has been. The inner cylinder 40 is formed shorter than the hub portion 31, one end 41 is positioned near the flange 32, the other end 42 is formed slightly longer than a substantially middle portion of the hub portion 31, and the other end 42 and the hub portion 31 are formed on the side wall 46. Are connected by A circular recess 49 is formed by the side surface 43 of the side wall 46 on the flange 33 side and the inner side surface 47 of the hub portion 31.

  On the side surface 43 of the side wall 46 on the flange 33 side, a pair of fixed shafts 50, 50 are provided so as to face each other. The fixed shaft 50 has a tip 51 extending to the vicinity of the flange 33, and a fitting hole 52 is formed in the tip 51. A mark 53 is fitted into the fitting hole 52. The mark 53 is formed of white plastic so as to increase the amount of reflected light received, and includes a fitting shaft 55 that is fitted into the fitting hole 52 and a reflector plate 56 that is formed at the tip of the fitting shaft 55. . On the surface of the reflection plate 56, a gently curved recess 57 is formed. The pair of fixed shafts 50 and 50 are accommodated in the recess 49.

  A ring-shaped boss 58 is formed on the flange 33 so as to surround the circular recess 49. The boss portion 58 has a tapered surface 60 formed on the outer peripheral edge 59 and a stepped recess 62 formed on the inner peripheral edge 61. The depth of the stepped recess 62 extends to substantially the tip of the fixed shafts 50 and 50. Further, a pair of protrusions 65, 65 are formed on the outer peripheral edge 59 of the boss portion 58 so as to face each other. The protrusions 65 and 65 are formed in a trapezoidal shape, and inclined edges 66 and 66 are formed on both sides.

  The protrusions 65 and 65 are disposed at substantially the same angle as the fixed shafts 50 and 50, but the positional relationship with the fixed shafts 50 and 50 is not limited to this. Moreover, although the fixed shafts 50 and 50 are set to two in the embodiment, the number is not limited to this and may be one or three or more. The flange 32 is also provided with a boss portion 67 similar to the flange 33 so as to face the boss portion 58.

  Further, a cylindrical hole 68 for detecting the rotational position of the wire reel 30 is formed in the side wall 46. A light emitting element and a light receiving element are arranged in the rotation region of the hole 68 of the reinforcing bar binding machine 1, and the rotation state of the wire reel 30 may be determined by passing the hole 68 between the two elements. . The substantially fan-shaped pattern formed on the outer peripheral edge side of the flanges 32 and 33 is a reinforcing rib of the flanges 32 and 33 that is thinned.

  The flange 32 is formed with a wire insertion opening 35 extending from the outer periphery to the hub portion 31 side. The end of winding of the wire 8 is latched and held in the wire insertion opening 35. A wire insertion hole 36 is formed in the hub portion 31 and the inner cylinder 40. The winding start end of the wire 8 is inserted and held in the wire insertion hole 36. When winding the wire 8, the winding start end of the wire 8 is inserted into the wire insertion hole 36 and wound in the inner cylinder 40 so that the winding start end does not come out of the wire insertion hole 36. Winding is started around the circumferential surface of the hub portion 31. Even if a force in the winding direction acts strongly on the wire 8, the pulling force can be received at the edge of the wire insertion opening 35.

  As shown in FIG. 10, the storage chamber 70 of the binding machine main body 2 is covered with a cover member 22 that is hinged and fixed to one side. The cover member 22 is provided with a reel mounting shaft 23 that can be inserted into and retracted from the mounting hole 45 of the wire reel 30. The cover member 22 is provided with a reel stopper 24 that locks the reel mounting shaft 23 in a state of protruding (set) into the storage chamber 70. As shown in FIG. 7, the storage chamber 70 includes a front wall 72, a bottom wall 73, and a side wall 75. The side wall 75 is formed with a circular protrusion 76 that fits into the stepped recess 62 of the wire reel 30, and a non-contact sensor (light sensor interrupter) 25 is provided on the protrusion 76. When the protrusion 76 is fitted into the stepped recess 62, as shown in FIG. 18, the light is prevented from entering the recess 49, and the disturbance light is prevented from entering the interrupter 25. The optical sensor 25 includes a light emitting element and a light receiving element, and the upper end of the mark 53 detected by the light sensor 25 is a concave recess 57. Therefore, light emitted by the light emitting element gathers in the light receiving element and is reliably marked. 53 can be detected.

A sensor arrangement hole 77 is opened in the protruding portion 76, and the reflection type interrupter 25, which is the non-contact sensor, is installed as an optical sensor in the sensor arrangement hole 77. The optical sensor 25 is connected to the above-described control circuit so that power is supplied to the interrupter 25 and an output signal of the interrupter 25 is transmitted to the control circuit. The control circuit detects the mark 53 on the wire reel 30 based on the output signal from the interrupter 25. The control circuit detects the change in the output voltage from the interrupter 25 and detects the number of marks 53.

  A contact sensor (first detection means) 80 is provided on the side wall 75 of the storage chamber 70 above the protrusion 76. The contact sensor 80 is a mechanical switch, and includes a swinging member 82 swingably provided on the support shaft 81, a contact piece 83 provided at the tip of the swinging member 82, and the contact piece 83 as a wire reel. The elastic member 85 urges toward the 30 side, the magnet portion 86 provided at the other end of the swinging member 82, and the Hall IC 87 with which the magnet portion 86 contacts with the elastic member 85.

  A switch which is a contact sensor (first detection means) 80 is provided in the binding machine main body 2, and a contact piece 83 projects from an opening 78 formed in the side wall 75, and the protrusion ( First detection portion) 65 comes into contact. In the switch as the contact sensor (first detection means) 80, when the protrusion (first detected portion) 65 of the reel body 30 a contacts the contact piece 83, the swing member 82 resists the elasticity of the elastic member 85. The magnet portion 86 is separated from the Hall IC 87.

  The contact sensor (first detection means) 80 is connected to the above-described control circuit, and an electric signal due to a change in the voltage of the Hall IC 87 is transmitted to the control circuit. The control circuit detects the rotation of the wire reel 30 based on an electrical signal from the contact sensor (first detection means) 80. The control circuit determines that the wire reel 30 is not rotating when the voltage fluctuation from the contact sensor (first detection means) 80 is not detected within a predetermined time, and is provided on the side surface of the reinforcing bar binding machine 1. The operator informs the operator that the wire 8 of the wire reel 30 has ended by, for example, emitting a lighted LED or the like and making a warning sound.

  If the wire reel 30 is not set normally, for example, if the reel mounting shaft 23 or the reel stopper 24 shown in FIG. 10 is forgotten to be set, the wire reel 30 may come off from the protrusion 76 during rotation. is there. In addition, depending on the orientation of the reinforcing bar binding machine body 2, the wire reel 30 may fall from the storage chamber 70 or jump out. At this time, since the contact piece 83 of the contact sensor (first detection means) 80 can detect that the wire reel 30 is detached from the protruding portion 76, the LED or the like is caused to emit light and a warning sound is emitted. The operator is informed that the wire reel 30 is rotating abnormally.

  The front wall 72 is provided with an elastic piece 89 that engages with the engaging claw 34 of the wire reel 30 and stops the rotation of the wire reel 30. The elastic piece 89 does not operate at the time of wire feeding, and the wire feeding is finished and the elastic piece 89 operates so that the wire reel 30 is braked by the activation of the electric motor 9. In the upper part of the front wall 72, an opening 90 for pulling out the wire 8 is formed. The opening 90 communicates with the wire passage 30.

  The reinforcing bar binding machine 1 has the above-described configuration, and stores and loads the wire reel 30 in the storage chamber 70 (step 101). The stepped recess 62 of the wire reel 30 is fitted into a protruding portion 76 formed on the side wall 75 of the storage chamber 70, and the reel mounting shaft 23 provided on the cover member 22 is protruded into the storage chamber 70, so that the reel mounting shaft is 23 is inserted into the mounting hole 45 of the reel body 30a. In this state, the reel mounting shaft 23 is locked by the reel stopper 24. The wire 8 of the wire reel 30 is pulled out, and the leading end is fed from the opening 90 of the front wall 72 to the wire passage 30 and placed in the gear 17 of the feeding device.

  Since the protrusion 76 fits into the stepped recess 62 of the wire reel 30, the inside of the recess 49 of the inner cylinder 40 is shielded from light, and disturbance light does not enter the interrupter (second detection means non-contact sensor) 25 in the recess 49. It is like that. A mark (second detected portion) 53 provided on the fixed shaft 50 of the wire reel 30 rotates around the interrupter (second detecting means) 25 of the protruding portion 76 with a predetermined gap therebetween, and the interrupter ( (Second detection means) 25 reflects the light.

  As described above, after loading the wire reel 30 into the reinforcing bar binding machine 1 (step 101), when a main switch (not shown) is turned on (step 102), the control circuit is initialized (step 103), and the motor 16 of the feeding device rotates. As the wire feed gear 17 rotates, the tip of the wire 8 wound around the wire reel 30 stored in the storage chamber 70 is sent to a predetermined position. When the microswitch 20 is turned on by the trigger 11 (step 104), the motor 16 rotates and the wire feed gear 17 rotates, and measurement of the feed amount of the wire 8 is started (step 105). By the rotation of the wire feed gear 17, the wire 8 wound around the wire reel 30 accommodated in the accommodation chamber 70 is sent to the front of the binding machine body 2 through the wire passage 12 in the guide portion 15. The rotation control of the motor 16 is performed by a control circuit (not shown) built in the binding machine body 2.

  At the same time as the wire 8 is fed forward, the wire reel 30 rotates, and the protrusion (first detected portion) 65 of the reel body 30a contacts the contact piece 83 of the contact sensor (first detection means) 80. When the protrusion (first detected portion) 65 of the reel body 30a comes into contact with the contact piece 83, the swing member 82 swings against the elasticity of the elastic member 85, and the magnet portion 86 is separated from the Hall IC 87. A pulse signal resulting from the voltage change is transmitted to the control circuit, and the pulses are counted and detection of the protrusion (first detected portion) 65 is started (step 106). The protrusion (first detected portion) 65 is detected within the set time (step 107), and if not detected, that is, if no pulse signal is transmitted within the set time, it is determined that the wire reel 30 is not rotating. Then, an LED or the like provided on the side surface of the reinforcing bar binding machine 1 is caused to emit light and a warning sound is emitted (step 108).

  When the protrusion (first detected part) 65 is detected within the set time, that is, when a pulse signal due to a change in voltage is transmitted to the control circuit, the wire reel 30 is recognized as rotating, The interrupter (second detection means non-contact sensor) 25 irradiates light and detects the reflected light from the mark (second detected portion) 53 provided on the fixed shaft 50 of the wire reel 30 (step 109). ), The mark 53 is detected, a detection signal is transmitted to the control circuit, and the number of the marks 53 is counted (step 110). When the projection (first detected portion) 65 next to the projection (first detected portion) 65 that first contacts the contact piece 83 of the contact sensor 80 is detected by contacting the contact piece 83 (step 111). ), The pulse signal is transmitted to the control circuit, the detection ends (step 112), and the mark (second detected portion) 53 detected by the interrupter (second detection means non-contact sensor) 25 is calculated. The wire reel 30 is identified (step 113).

  As described above, since the protrusion (first detected portion) 65 is provided opposite to the reel body 30a, the rotation amount is ½ rotation (180 degrees). The type of the wire reel 30 is identified by the number of the marks 53, and the control circuit sets the energizing time of the motor 16 of the feeding device and the supply power of the electric motor 9. If the next protrusion (first detected portion) 65 is not detected by the first detection means 80 within a predetermined time (step 115), it is determined that the wire reel 30 is not rotating, and the reinforcing bar is bound. The LED provided on the side surface of the machine 1 is caused to emit light and a warning sound is emitted (step 116).

When the amount of rotation of the wire reel 30 is detected and no mark 53 is detected in the meantime (step 117), or when more than a predetermined number, for example, three or more marks 53 are detected (step 118), the rebar binding machine 1 An LED or the like provided on the side surface is caused to emit light and a warning sound is emitted (steps 119 and 120). The type of the wire reel 30 is identified by the number of the detected marks 53, and the control circuit determines the amount of feed of the wire 8 according to the number of rotations (rotation angle) of the wire feed gear 17 or the torsional torque due to the power supplied by the electric motor 9. Is set. For example, when the number of detected marks 53 is one (step 121), the feed amount A of the wire 8 and the torsion torque A of the wire 8 are set (step 122). If the number of detected marks 53 is two (step 123), the feed amount B of the wire 8 and the torsion torque B of the wire 8 are set (step 124).

  The detection is performed instantaneously, and the wire 8 is sent forward along the guide portion 15 without stopping. After the type of the wire reel 30 is identified, the mark 53 or the protrusion 65 serves as a reel rotation detecting means, and the rotation detection of the wire reel 30 is started by the mark 53 or the protrusion 65 (step 125). When the elapsed time T1 from the last detection of the mark 53 or the protrusion 65 to the detection of the next mark 53 or the protrusion 65 is longer than the time (set time) T2 for determining an error (step 126), the wire Assuming that the reel 30 is not rotating, an LED or the like provided on the side surface of the reinforcing bar binding machine 1 is caused to emit light, and a warning sound is emitted (step 127).

  When T1 is shorter than T2 (step 126), the wire 8 is fed by a set amount according to the type of the wire reel 30, and wound around the reinforcing bar 3 in a loop shape. Alternatively, if B has not been reached (step 128), the process returns to step 126 again. If the feed amount of the wire 8 has reached the set feed amount A or B (step 128), the wire feed is finished (step 129), and after the wire is cut, the set twist of the electric motor 9 according to the type of the wire reel 30 The rebar 3 is bound by being twisted by the torque A or B (step 130). Therefore, the reinforcing bar binding machine 1 can automatically adjust the feed amount or twisting torque of the wire 8 in accordance with the thickness, nature, etc. of the wire 8.

  In the above embodiment, two marks (second detected parts) 53 are provided on the wire reel 30, but it goes without saying that one or three or more marks may be provided. Further, the mark 53 is made of white plastic, but it may be joined with a reflective seal. In addition, two protrusions (first detected portions) 65 are provided on the wire reel 30, but it goes without saying that one or three or more may be provided.

  If the wire reel 30 is not normally set in the storage chamber 70, the above-described reinforcing bar binding machine 1 is configured so that the first detection means 80 is a non-contact sensor such as an optical sensor. There may be a case where light other than the reflected light from the first detected part or disturbance light reacts and is detected as normal rotation. However, in the reinforcing bar binding machine 1 described in the above embodiment, since the first detection means 80 is a contact sensor, when the wire reel 30 is not normally set in the storage chamber 70, the wire The reel 30 is not detected, and at this time, it can be determined that the state is abnormal.

  The storage chamber 70 of the binding machine body 2 is provided with a non-contact sensor (light sensor interrupter) 25 for detecting a mark (second detected portion) 53 of the wire reel 30 as a second detection means. However, the second detected portion may be a concave or convex portion instead of a mark, the second detecting means may be a contact sensor (switch), and the type of wire reel may be identified by two contact sensors. . Further, the storage chamber 70 of the binding machine body 2 is provided with a contact sensor (switch) 80 for detecting the protrusion (first detected portion) 65 of the wire reel 30 as the first detection means. The first detected portion may be a mark, not an unevenness, and the first detection means may be a non-contact sensor (light sensor interrupter), and the type of wire reel may be identified by two non-contact sensors.

It is a general view which shows the outline | summary of the reinforcing bar binding machine which concerns on this invention. It is a perspective view of the reinforcing bar binding machine with the cover removed. It is a top view of the reinforcing bar binding machine with the cover removed. It is an upper surface sectional view of the reinforcing bar binding machine with the cover removed. It is a right view of the reinforcing bar binding machine with the cover removed. It is a back sectional view of the reinforcing bar binding machine which attached the cover. FIG. 3 is a perspective view of the reinforcing bar binding machine with the wire reel of FIG. 2 removed. FIG. 4 is a top view of the reinforcing bar binding machine with the wire reel of FIG. 3 removed. FIG. 5 is a top cross-sectional view of the reinforcing bar binding machine with the wire reel of FIG. 4 removed. It is explanatory drawing which shows the state which attached the cover. FIG. 6 is a right side view of the reinforcing bar binding machine with the wire reel of FIG. 5 removed. FIG. 7 is a rear sectional view of the reinforcing bar binding machine with the wire reel of FIG. 6 removed. It is a left view of a reinforcing bar binding machine. It is a left side sectional view of a reinforcing bar binding machine. It is a perspective view of a wire reel. It is explanatory drawing of a wire reel. It is explanatory drawing of a wire reel. It is explanatory drawing of the mounting state of a wire reel. It is a flowchart which shows operation | movement of a reinforcing bar binding machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcing bar binding machine 2 Bundling machine body 3 Reinforcing bar 5 Catch plate part 6 Wire insertion groove 7 Twist hook 8 Wire 9 Electric motor 10 Advancement / retraction mechanism 11 Trigger 12 Wire path 15 Guide part 16 Motor (sending device)
17 Gear (feeding device)
20 Micro switch 21 Wire gripping cutting means 22 Cover member 23 Reel mounting shaft 24 Reel stopper 25 Interrupter (second detection means non-contact sensor)
DESCRIPTION OF SYMBOLS 30 Wire reel 30a Reel main body 31 Hub part 32 Flange 33 Flange 34 Engagement claw 35 Wire insertion opening part 36 Wire insertion hole 40 Inner cylinder 41 One end 42 Other end 43 Side surface 45 Mounting hole 46 Side wall 47 Inner side surface 49 Concave part 50 Fixed shaft 51 Tip 52 Insertion hole 53 Mark (second detected part)
55 Insertion shaft 56 Reflector plate 57 Concave portion 58 Boss portion 59 Outer peripheral edge 60 Tapered surface 61 Inner peripheral edge 62 Step recessed portion 65 Protrusion (first detected portion)
66 Inclined edge 67 Boss part 68 Hole 70 Storage chamber 72 Front wall 73 Bottom wall 75 Side wall 76 Projection part 77 Sensor arrangement hole 78 Opening 80 Switch (first detection means contact sensor)
81 Support shaft 82 Oscillating member 83 Contact piece 85 Elastic member 86 Magnet portion 87 Hall IC
89 Elastic piece 90 Opening

Claims (11)

In a rebar binding machine that attaches a wire reel around a reinforcing bar binding wire to a storage chamber provided in the binding machine body, twists the wire around the reinforcing bar, and then twists the rebar to bind the rebar.
In the storage room,
First detection means for detecting the amount of rotation of the wire reel;
A reinforcing bar binding machine comprising a second detecting means for detecting the number of second detected parts of the wire reel. A wire reel around which a wire for rebar binding is wound is mounted in the storage room provided in the binding machine body, the wire is fed out while rotating the wire reel, and the wire is wound around the rebar and then twisted. In the rebar binding machine that binds the rebar,
In the storage room,
First detection means for detecting the amount of rotation of the wire reel;
Second detection means for detecting the number of second detected parts of the wire reel between the rotation amounts detected by the first detection means is provided,
The binding machine main body is provided with a control means for controlling a wire feed amount or a wire twisting torque according to the number of second detected parts detected by the second detection means. Machine.   The reinforcing bar binding machine according to claim 1 or 2, wherein the amount of rotation of the wire reel is detected by detecting a first detected part of the wire reel by a first detecting means.   The first detection means is a contact type sensor, the first detected part is a convex part or a concave part detected by the contact type sensor, the second detection means is a non-contact type sensor, The reinforcing bar binding machine according to claim 3, wherein the detected part is a mark detected by a non-contact sensor. Used in a reinforcing bar binding machine that attaches a wire reel around a reinforcing bar binding wire to a storage chamber provided in the binding machine main body, winds the wire around the reinforcing bar, and then twists the reinforcing bar to bind the reinforcing bar A wire reel,
The reel body
A first detected part detected by the first detecting means of the reinforcing bar binding machine;
A wire reel, characterized in that a second detected part to be detected by the second detecting means of the reinforcing bar binding machine is provided.   The amount of rotation of the wire reel is detected by detecting the first detected portion by the first detecting means, and the type of the wire reel is determined by detecting the second detected portion by the second detecting means. 6. The wire reel according to claim 5, wherein the wire reel is identified.   The first detection means is a contact type sensor, the first detected part is a convex part or a concave part detected by the contact type sensor, the second detection means is a non-contact type sensor, The wire reel according to claim 5 or 6, wherein the detected portion is a mark detected by a non-contact sensor. A wire reel around which a wire for rebar binding is wound is mounted in the storage room provided in the binding machine body, the wire is fed out while rotating the wire reel, and the wire is wound around the rebar and then twisted. A method of identifying a wire reel used in a reinforcing bar binding machine for binding the reinforcing bars,
A wire reel characterized by detecting the amount of rotation of the wire reel and detecting the number of detected parts provided on the wire reel between the detected amounts of rotation of the wire reel to identify the type of wire reel. Identification method.   9. The wire reel identification method according to claim 8, wherein the wire feed amount or the wire twisting torque is adjusted according to the identified wire reel type. A wire reel around which a wire for rebar binding is wound is mounted in the storage room provided in the binding machine body, the wire is fed out while rotating the wire reel, and the wire is wound around the rebar and then twisted. A method of identifying a wire reel used in a reinforcing bar binding machine for binding the reinforcing bars,
The first detecting means detects the first detected portion provided in the reel body, thereby detecting the rotation amount of the wire reel,
During the detected amount of wire reel rotation,
A method of identifying a wire reel, characterized in that the type of the wire reel is identified by the second detecting means detecting the number of second detected parts provided in the reel body.   The first detection means is a contact type sensor, the first detected part is a convex part or a concave part detected by the contact type sensor, the second detection means is a non-contact type sensor, The wire reel identification method according to claim 10, wherein the detected portion is a mark detected by a non-contact sensor.

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