摘要:
An electric-powered cutting machine includes: an electric motor, a housing for the electric motor; a plunger driven by the electric motor to reciprocate; and a blade holding mechanism. The blade holding mechanism holds a blade at a tip end portion of the plunger. The blade holding mechanism includes: a blade receiving face including a groove, a swinging member and a pressing member. The groove is shaped substantially the same as an attachment portion of the blade. The swinging member has one and other ends and pivoted at a swing fulcrum. The one end has a blade pressing portion capable of being disposed to oppose to the groove. The other end elongates to separate from the plunger. The pressing member presses the one end toward the groove.
摘要:
A blade attachment/detachment mechanism for detachably attaching a blade to a saber saw. An end portion of the blade is formed with a blade hole. A reciprocally movable plunger has a blade attachment end portion where a slit and a stepped hole are formed. The slit extends in a longitudinal direction of the blade, and the stepped hole extends in a direction perpendicular to the slit and intersects the slit. An engagement pin is provided in the stepped hole. The engagement pin is engageable with the blade hole to fix the blade to the plunger when the blade end is inserted into the slit. For moving the engagement pin, a knob is pivotally supported to the blade attachment end portion, and a torsion spring is provided to bias the knob in a blade attaching direction. The knob has a slanted surface in engagement with the engagement pin. When the knob is pivotally moved to the blade attaching direction by the biasing force of the torsion spring, the slanted surfaces pushes the engagement pin to maintain engagement with the blade hole. When the knob is manually moved in an opposite direction, the urging force of the slanted surface toward the engagement pin is reduced. The engagement pin is also biased by a compression spring, so that the engagement pin is disengaged from the blade hole by the biasing force of the compression spring.
摘要:
A print system having a first printer and a second printer being placed at the stage following the first printer, the first printer having a mark formation section for forming a register mark at a predetermined location of a web and the second printer having mark detector for detecting the register mark and a buffer plate being placed so that it can be advanced to and retreated from a web transport passage for giving a constant tension to the web comprises a controller for setting the buffer plate to a predetermined position during the period until the register mark is transported at a constant distance after passing through the mark detector.
摘要:
Each of changeable rotors has an identification mark portion thereon. The identification mark portion is detected to generate an identification signal. A microprocessor starts and accelerates rotation of the motor, detects whether the identification signal is detected during acceleration of the rotor, detects whether the identification signal has been detected before the motor reaches a predetermined rotation speed, and controls the driver to rotate the motor at a steady state rotation speed if identification signal has not been detected before rotation of the motor reaches a predetermined rotation speed, to provide detection of the identification mark portion by the identification mark detection means. The microprocessor cyclically detects whether the identification mark portion is detected during rotating the rotor at the steady state rotation speed. The user is informed of error when the control means fails to detect the identification mark portion a predetermined times or within a predetermined interval.
摘要:
In order to provide an electric tool such that the capacitances of noise-suppressing film capacitors can be increased without increasing the diameter of a handle section, the housing of the electric tool comprises: a body section that stores a brushless motor, a striking mechanism part, and a portion of an output part; a handle section, whose one end is connected to the body section; and a storage section that is formed on the other end of the handle section. A pair of film capacitors for removing noise generated from an inverter circuit are mounted on a capacitor substrate and stored side by side inside the handle section. The film capacitors are connected in parallel with each other, thereby providing a capacitor having a larger total capacitance than before.
摘要:
A power tool includes: a battery connecting part to which one of a first battery pack and a second battery pack having capacity smaller than that of the first battery pack is detachably attachable; a motor driven by electric power supplied from the battery pack; current detection means configured to detect a discharge current flowing from the battery pack to the motor; cut-off controlling means configured to cut off the discharge current when the discharge current becomes equal to or larger than a current threshold; and battery type discrimination means configured to discriminate the battery pack connected to the battery connecting part. The current threshold when the second battery pack is connected to the battery connecting part is lower than that when the first battery pack is connected to the battery connecting part.
摘要:
Provided is an easy-to-use electric tool with which braking force can be changed according to work conditions. When an operation switch 5 is turned off, a control unit 50 detects a rotation rate R1 of an electric motor 6. The control unit 50 stands by for a prescribed period, detects a rotation rate R2 of the electric motor 6, and calculates the difference between the rotation rates R1, R2 (R=R1−R2). Since the rotation rate difference R corresponds to the rate of change in rotation rate with time during deceleration of the electric motor 6 and is smaller the larger the moment of inertia of the attached rotary tool, the control unit 50 can determine the moment of inertia of the rotary tool on the basis of the rotation rate difference R. The control unit 50 sets the braking force according to the moment of inertia and performs braking.
摘要:
Provided is an impact tool which can perform control in accordance with working situations. The impact tool converts a torque of a brushless motor into a striking force and applies it to a tip tool. The impact tool includes: a motor control unit which makes detection about whether the tip tool is pressed against an object during the rotation of the brushless motor; and a motor control unit which performs speed increase control for increasing the rotational speed of the brushless motor when a state of pressing the tip tool against the object has been detected continuously for a predetermined time.
摘要:
In order to provide a charging apparatus for efficiently cooling a battery pack, the charging apparatus comprises: a case 2 having a bottom portion, an upper portion opposite to the bottom portion, and a side portion coupling the bottom portion and the upper portion; a plurality of fans 5 and 6 provided in the case, the plurality of fans being arranged along the side portion; and a charging circuit portion 4 provided in the case and configured to charge a battery pack, the charging circuit having a heat-producing element that produces heat in connection with charging of the battery pack 3.
摘要:
In order to provide a driver for reducing reaction generated to a driver main body, the driver 1 includes a nose portion 3 provided in a housing 2 and extending in a longitudinal direction, the nose portion being configured to allow a fastener to pass therethrough, a plunger 7 configured to move in an impact direction parallel to the longitudinal direction to impact the fastener through the nose portion, a weight 8, and a coil spring 9 configured to be compressed by a motor 5 in the longitudinal direction. a release of the compression causing the plunger 7 to move in the impact direction, while causing the weight 8 to move in a counter-impact direction which is away from the plunger 7. The coil spring 9 is provided between the plunger 7 and the weight 8. The coil spring has one end portion urging the plunger 7, and another end portion urging the weight 8.