Abstract: A rechargeable electric tool includes a warning device which monitors a voltage of a power source battery and indicates a warning by means of an LED or a buzzer when the power source voltage is reduced to be equal to or lower than a reference voltage. The tool is configured such that, even when the warning is indicated, a control to interrupt a power supply to a motor is not performed, thereby enabling a usual operation in response to an activating operation on a trigger switch.

Abstract: Two guide pins 11 and 12 formed upright in a guide plate 7 are received in guide pin fitting holes 13 and 14 formed in a guide member 8. Fixed screws 23a and 23b are screw-connected to the guide pins 11 and 12. One guide pin 12 is fitted to the corresponding guide pin fitting hole 14 with a play. Screw holes 20 and 21 are formed through the inner surface of the guide pin fitting hole 14 and the outer surface of the guide member 8. An angle of the guide member 8 with respect to the guide plate 7 is adjusted by allowing front ends of embedded screws 22a and 22b respectively screw-inserted in the screw holes 20 and 21 to respectively engage with a peripheral surface of the guide pin 12.

Abstract: In a reinforcing bar binder in which a wire reel around which a reinforcing bar binding wire is wound is rotatably housed in a housing chamber in a binder main body, the wire is pulled out from the wire reel and wound around reinforcing bars, and the reinforcing bars are bound by twisting the wound portion, an opening is formed through one of both side walls of the housing chamber at a position corresponding to a shaft receiving portion formed on the wire reel. On the one side wall, a reel receiver which is supported so as to come into and come out from the opening is fitted to the shaft receiving portion of the wire reel when it is pushed into the inside of the side wall. A reel stopper moves along the wall surface of the one side wall and can engage with the reel receiver fitted to the shaft receiving portion. A leaf spring urges the reel stopper engaged with the reel receiver to the pushing-in side.

Abstract: A reinforcing bar binding machine is provided with a feed means for feeding a wire from a wire reel rotatably mounted on a binding machine body, a braking means for braking a rotation of the wire reel, and a control means that starts a braking to the rotation of the wire reel by the braking means after the wire is fed to a predetermined amount by the feed means.

Abstract: An electric power tool “A” operates a working part 5 by repeating rotation of a motor 4 in a normal direction and in a reverse direction one or more times. The motor 4 includes a brushless motor. Sensors H for detecting a position of a rotor 15 are provided on the motor 4 so as to be advanced by an electrical angle of 30°±?° from an intermediate position between respective stator teeth 16 in a direction of the normal rotation of the rotor 15. A control part 20 for controlling the rotation of the motor 4 controls a driving signal of the motor 4 based on the results of detection by the sensors H. Moreover, the control part 20 selects a detection signal of the sensors H so that relation between the rotor 15 and the detection signal of the sensors H is equivalent in either of the normal rotation and the reverse rotation of the rotor 15.

Abstract: A wire feed amount detection mechanism is configured by magnets mounted at an outer peripheral surface of a V-grooved drive gear of a wire feed mechanism and a magnetic sensor mounted on a body. A reinforcing bar winding turn number-setting switch is provided on the body. A control portion controls a wire feed amount of a wire feed mechanism based on a set value of the reinforcing bar winding turn number-setting switch. The number of turns of the wire around reinforcing bars can be arbitrarily set, for example, to any one of 1 to 4, and the binding can be effected with a binding force corresponding to a strength required by binding portions. As a result, with respect to those binding portions requiring a low binding force, the binding is effected with a smaller turn number, so that the amount of consumption of the wire can be saved, and besides those pipes (such as electric wiring pipes and hot water pipes) which are lower in strength than the reinforcing bars can also be bound together.

Abstract: A reinforcing bar binding machine is provided with a control unit operated in such a manner that at the time of turning on an electric power source switch, a setting position of a motor drive adjustment dial and a state of a trigger lever are read, and when the motor drive adjustment dial is at a specific setting position and when the trigger lever is turned on, a binding wire cutting mechanism is driven by a predetermined number of times for warming up the binding wire cutting mechanism. When the warming-up operation is carried out in a cold environment, it is possible to reduce the viscosity of grease coated on a mechanism portion. Therefore, it is possible to lower a viscosity of grease applied on a mechanical portion and conduct a reinforcing bar binding work without wasting a binding wire in the same manner as that in a warm environment.

Abstract: It includes a driving load detecting device which detects a driving load amount of a tie wire cutting mechanism, and a tie wire feeding amount control device which controls a feeding amount of the tie wire in a subsequent tying operation in accordance with the detected driving load amount. If the driving load amount when cutting the tie wire is equal to or less than a cutting determination reference value, the tie wire is fed by a normal feeding amount with a predetermined amount being added thereto in the subsequent tying operation to compensate the tie wire feeding amount, whereby a tip end of the tie wire is fed to a position which is same as the position in the normal state. The subsequent tying cycle is executed normally even if the tip end of the biding wire is failed to be clamped due to the failure of the feeding operation of the tie wire and the tie wire is pulled excessively.

Abstract: A rechargeable electric tool includes a warning device which monitors a voltage of a power source battery and indicates a warning by means of an LED or a buzzer when the power source voltage is reduced to be equal to or lower than a reference voltage. The tool is configured such that, even when the warning is indicated, a control to interrupt a power supply to a motor is not performed, thereby enabling a usual operation in response to an activating operation on a trigger switch.

Abstract: A reinforcing bar binding machine is provided with a control unit operated in such a manner that at the time of turning on an electric power source switch, a setting position of a motor drive adjustment dial and a state of a trigger lever are read, and when the motor drive adjustment dial is at a specific setting position and when the trigger lever is turned on, a binding wire cutting mechanism is driven by a predetermined number of times for warming up the binding wire cutting mechanism. When the warming-up operation is carried out in a cold environment, it is possible to reduce the viscosity of grease coated on a mechanism portion. Therefore, it is possible to lower a viscosity of grease applied on a mechanical portion and conduct a reinforcing bar binding work without wasting a binding wire in the same manner as that in a warm environment.

Abstract: A front end of a loop of a wire fed out to a nose (6) by a binding wire feeding mechanism (1) is pinched by a clamp plate (28) of a binding wire clamping apparatus (25) and the wire is pulled back by driving to rotate reversely a feeding motor (13) of the binding wire feeding mechanism (1). When the wire is brought into close contact with a reinforcing bar (S) and a load of the feeding motor is increased to thereby increase a drive current by a constant amount, a control apparatus stops the feeding motor. Thereafter, the binding wire clamping apparatus (25) is rotated to twist the binding wire to bind the reinforcing bar. Since the wire is pulled back and a length of the wire is automatically adjusted in accordance with a diameter of the reinforcing bar, a state of finishing to bind the reinforcing bar is made to be uniform and also an amount of consuming the wire is reduced.

Abstract: A wire feed amount detection mechanism is configured by magnets mounted at an outer peripheral surface of a V-grooved drive gear of a wire feed mechanism and a magnetic sensor mounted on a body. A reinforcing bar winding turn number-setting switch is provided on the body. A control portion controls a wire feed amount of a wire feed mechanism based on a set value of the reinforcing bar winding turn number-setting switch. The number of turns of the wire around reinforcing bars can be arbitrarily set, for example, to any one of 1 to 4, and the binding can be effected with a binding force corresponding to a strength required by binding portions. As a result, with respect to those binding portions requiring a low binding force, the binding is effected with a smaller turn number, so that the amount of consumption of the wire can be saved, and besides those pipes (such as electric wiring pipes and hot water pipes) which are lower in strength than the reinforcing bars can also be bound together.

Abstract: A front end of a ball screw shaft driven by a motor is connected with a binding line clamp apparatus (513) including three clamp plates (514, 515, 516). The left and right clamp plates (515, 516) are constituted to be brought into elastic contact with the center clamp plate (515) and close the left and right clamp plates by operation of cams (527, 528) when a sleeve is moved rearward. In a state of opening the clamp plates, a binding line is fed out to an upper side by passing through an interval between the right clamp plate (515) and the center clamp plate (514), formed in a loop shape and moved into an interval between the left clamp plate (516) and the center clamp plate (517). When the sleeve is moved rearward by driving to rotate a ball screw shaft, the left and right clamp plates are closed to grasp a front end and a rear end of the binding line loop and thereafter, the binding line clamp apparatus is rotated to twist the binding line to bind a reinforcing bar.

Abstract: A final gear (23) and a ball screw shaft (24) of a rotation drive system of a binding line twist mechanism are connected by a spline and a shaft portion of a center clamp plate (26) of a binding line clamp apparatus (25) is connected to a front end of the ball screw shaft (24). A shift mechanism for moving the ball screw shaft (24) and the binding line clamp apparatus (25) in a front and rear direction by a slide motor (22) is provided. A wire (W) is wound around a reinforcing bar (S) by a binding line feed mechanism, the wire is grasped by a front end portion of the binding line clamp apparatus (25) and thereafter, a shift mechanism applies a tension to a loop of the wire by moving rearward the binding line clamp apparatus (25). The binding line clamp apparatus (25) is rotated by a twist motor (21) and the shift mechanism twists up the wire by moving forward the binding line clamp apparatus (25).

Abstract: A reverse rotational number of a binding wire feed mechanism is set such that a binding wire is completely pulled back regardless of a boldness or flexibility of the binding wire, a diameter of a reinforcing bar or the like. A driven gear 14 having a V groove of the binding wire feed mechanism is brought into elastic contact with a main drive gear 13 having a V groove by a spring and the binding wire is fed by pinching the binding wire by the main drive gear 13 having the V groove and the driven gear 14 having the V groove. After feeding out the binding wire to form a loop around the reinforcing bar and clamping a front end of the binding wire by a twist mechanism, the binding wire feed mechanism is rotated reversely and the binding wire is pulled back to be wound around the reinforcing bar.

Abstract: A reverse rotational number of a binding wire feed mechanism is set such that a binding wire is completely pulled back regardless of a boldness or flexibility of the binding wire, a diameter of a reinforcing bar or the like. A driven gear 14 having a V groove of the binding wire feed mechanism is brought into elastic contact with a main drive gear 13 having a V groove by a spring and the binding wire is fed by pinching the binding wire by the main drive gear 13 having the V groove and the driven gear 14 having the V groove. After feeding out the binding wire to form a loop around the reinforcing bar and clamping a front end of the binding wire by a twist mechanism, the binding wire feed mechanism is rotated reversely and the binding wire is pulled back to be wound around the reinforcing bar.

Abstract: A front end of a loop of a wire fed out to a nose (6) by a binding wire feeding mechanism (1) is pinched by a clamp plate (28) of a binding wire clamping apparatus (25) and the wire is pulled back by driving to rotate reversely a feeding motor (13) of the binding wire feeding mechanism (1). When the wire is brought into close contact with a reinforcing bar (S) and a load of the feeding motor is increased to thereby increase a drive current by a constant amount, a control apparatus stops the feeding motor. Thereafter, the binding wire clamping apparatus (25) is rotated to twist the binding wire to bind the reinforcing bar. Since the wire is pulled back and a length of the wire is automatically adjusted in accordance with a diameter of the reinforcing bar, a state of finishing to bind the reinforcing bar is made to be uniform and also an amount of consuming the wire is reduced.

Abstract: A front end of a ball screw shaft driven by a motor is connected with a binding line clamp apparatus (513) including three clamp plates (514, 515, 516). The left and right clamp plates (515, 516) are constituted to be brought into elastic contact with the center clamp plate (515) and close the left and right clamp plates by operation of cams (527, 528) when a sleeve is moved rearward. In a state of opening the clamp plates, a binding line is fed out to an upper side by passing through an interval between the right clamp plate (515) and the center clamp plate (514), formed in a loop shape and moved into an interval between the left clamp plate (516) and the center clamp plate (517). When the sleeve is moved rearward by driving to rotate a ball screw shaft, the left and right clamp plates are closed to grasp a front end and a rear end of the binding line loop and thereafter, the binding line clamp apparatus is rotated to twist the binding line to bind a reinforcing bar.

Abstract: A final gear (23) and a ball screw shaft (24) of a rotation drive system of a binding line twist mechanism are connected by a spline and a shaft portion of a center clamp plate (26) of a binding line clamp apparatus (25) is connected to a front end of the ball screw shaft (24). A shift mechanism for moving the ball screw shaft (24) and the binding line clamp apparatus (25) in a front and rear direction by a slide motor (22) is provided. A wire (W) is wound around a reinforcing bar (S) by a binding line feed mechanism, the wire is grasped by a front end portion of the binding line clamp apparatus (25) and thereafter, a shift mechanism applies a tension to a loop of the wire by moving rearward the binding line clamp apparatus (25). The binding line clamp apparatus (25) is rotated by a twist motor (21) and the shift mechanism twists up the wire by moving forward the binding line clamp apparatus (25).

Abstract: A binding machine for reinforcing bars comprising a binding machine body, a bending guide arm, a feed adjustment mechanism, and a twisting mechanism. The bending guide arm is arranged at an end of the binding machine body. A binding wire is sent outside reinforcing bars from the bending guide arm and is formed into a loop, and then a portion of the loop is twisted by the twisting mechanism so as to bind the reinforcing bars. The feed adjustment mechanism adjusts a feed of the binding wire according to one of a diameter of the reinforcing bars and a diameter of the loop of the binding wire wound round the reinforcing bars.