Abstract: The durability of the driver is further improved. The nail driver for driving a nail into a material to be driven includes: a plunger moved in a first direction parallel to a driving direction of the nail by bias caused by a coil spring and moved in a second direction opposite to the first direction against the bias of the coil spring (25); and a weight moved in the second direction by bias caused by a coil spring and moved in the first direction against the bias of the coil spring. The weight (24) is moved in the second direction when the plunger is moved in the first direction and is moved in the first direction when the plunger is moved in the second direction, and the plunger and the weight are moved in the first direction and the second direction so as to be independent from each other.

Abstract: A nail driving machine capable of reducing vibrations is provided. A nail driving machine that strikes a nail to be driven into a workpiece W includes a driver blade that is provided to be capable of moving along an axis and moves in a first direction to strike the nail, a weight that when the driver blade strikes the nail, moves in a second direction reverse to the first direction, and a coil spring that is compressed along the axis to generate a repulsive force before the driver blade strikes the nail and causes the driver blade to move in the first direction to strike the nail due to the repulsive force and causes the weight to move in the second direction due to the repulsive force.

Abstract: A nail driving machine capable of reducing vibrations is provided. A nail driving machine that strikes a nail to be driven into a workpiece W includes a driver blade that is provided to be capable of moving along an axis and moves in a first direction to strike the nail, a weight that when the driver blade strikes the nail, moves in a second direction reverse to the first direction, and a coil spring that is compressed along the axis to generate a repulsive force before the driver blade strikes the nail and causes the driver blade to move in the first direction to strike the nail due to the repulsive force and causes the weight to move in the second direction due to the repulsive force.

Abstract: A driver includes a housing in which an accumulator for accumulating compressed air is provided; a trigger provided in the housing; a cylinder stored in the housing; a piston stored to be slidable in the cylinder and driven by the compressed air; and a head valve moving in response to movement of the trigger between an acting position which is distant from the cylinder so that the compressed air acts on the piston and a blocking position which abuts against the cylinder so that the action of the compressed air on the piston is blocked. The cylinder can be arranged at a first position and a second position closer to the head valve than the first position in a state that the head valve moves from the blocking position to the acting position.

Abstract: The durability of the driver is further improved. The nail driver for driving a nail into a material to be driven includes: a plunger moved in a first direction parallel to a driving direction of the nail by bias caused by a coil spring and moved in a second direction opposite to the first direction against the bias of the coil spring (25); and a weight moved in the second direction by bias caused by a coil spring and moved in the first direction against the bias of the coil spring. The weight (24) is moved in the second direction when the plunger is moved in the first direction and is moved in the first direction when the plunger is moved in the second direction, and the plunger and the weight are moved in the first direction and the second direction so as to be independent from each other.

Abstract: In a tubular guide part provided in a housing of a driver, a gas pressure accumulation member formed by filling compressed air in a bellows is provided. An actuating piston is detachably attached to a lower end surface of the gas pressure accumulation member. On a lateral surface of the actuating piston, latched parts and are provided so as to be arranged in a vertical direction. A driver blade is attached to an attachment part provided at a lower end surface of the actuating piston. When a cam is rotated to sequentially engage latching parts and with the latched parts and, the actuating piston is moved to the upper side. When the latching part is detached from the latched part, the actuating piston is moved downward by repulsive force of the compressed gas, and a nail is driven by the driver blade.

Abstract: A driver which strikes a fastener to drive it into a target object has a cylinder and a driver blade which is reciprocably housed in the cylinder and is driven to reciprocate by pressure of fluid supplied into the cylinder to strike the fastener, and the driver blade is made up of a shaft part and a piston provided at one end of the shaft part and a damping member is incorporated in the shaft part.

Abstract: A fastening machine 1 is provided, which prevents the tip member 131 from wear and improve its durability as well as align a material into which a fastener is to be driven. The fastening machine 1 is provided with a housing 2, a handle 2A extended from the housing 2, a nose 3 extended from the housing 2 and comprising an ejecting mouth 6 to fire a fastener 25 and a tip member 131 arranged at the tip of nose 3 in the direction of ejecting the fastener 25. The tip member 131 is characterized by comprising a super-hard material member 19 in the side facing a material into which a fastener is to be driven and in the side opposite to the direction of extending the handle 2A.

Abstract: A driver includes a housing in which an accumulator for accumulating compressed air is provided; a trigger provided in the housing; a cylinder stored in the housing; a piston stored to be slidable in the cylinder and driven by the compressed air; and a head valve moving in response to movement of the trigger between an acting position which is distant from the cylinder so that the compressed air acts on the piston and a blocking position which abuts against the cylinder so that the action of the compressed air on the piston is blocked. The cylinder can be arranged at a first position and a second position closer to the head valve than the first position in a state that the head valve moves from the blocking position to the acting position.

Abstract: The present application relates to a driving machine. The driving machine has a driver blade for striking a fastener and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom. An injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage. The injection hole is defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole. A positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.

Abstract: A fastening tool includes a main body, a cylinder, a piston, a bumper, and an adjusting unit. The main body defines a compressed air chamber and an air damper chamber capable of communicating with the compressed air chamber through an air channel. The air channel has a cross-sectional area. The cylinder is provided in the main body. The piston slidably reciprocates between an upper dead center and a lower dead center in the cylinder. The bumper deforms to absorb energy of the piston when the piston is reaching the lower dead center. The energy of the piston is further absorbed by compressed air in the air damper chamber. The adjusting unit is configured to adjust the cross-sectional area.

Abstract: A driving machine including: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein an injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage, wherein the injection hole being defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole, and wherein a positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.

Abstract: A driving machine including: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein an injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage, wherein the injection hole being defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole, and wherein a positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.

Abstract: A driving machine includes a cylinder, a piston fitted into the cylinder in a reciprocatingly movable manner, a driver connected to the piston, a bumper provided in the bottom portion of the cylinder, a housing, a return air chamber, a fastening member feed piston movable backward or forward by supplying compressed air within the return air chamber from an air chamber passage hole 9 through air passages and to a fastening member feed cylinder or discharging such compressed air from the fastening member feed cylinder, a return spring for energizing the fastening member feed piston, and a feed pawl mounted on the leading end of the fastening member feed piston. In the driving machine, between the return air chamber and the fastening member feed cylinder, a filter portion is provided having a projection shape and small holes.

Abstract: A fastening machine 1 is provided, which prevents the tip member 131 from wear and improve its durability as well as align a material into which a fastener is to be driven. The fastening machine 1 is provided with a housing 2, a handle 2A extended from the housing 2, a nose 3 extended from the housing 2 and comprising an ejecting mouth 6 to fire a fastener 25 and a tip member 131 arranged at the tip of nose 3 in the direction of ejecting the fastener 25. The tip member 131 is characterized by comprising a super-hard material member 19 in the side facing a material into which a fastener is to be driven and in the side opposite to the direction of extending the handle 2A.

Abstract: According to an aspect of the present invention, there is provided a driving machine including: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein an injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage, wherein the injection hole being defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole, and wherein a disposing means is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.

Abstract: A driving machine includes a cylinder, a piston fitted into the cylinder in a reciprocatingly movable manner, a driver connected to the piston, a bumper provided in the bottom portion of the cylinder, a housing, a return air chamber, a fastening member feed piston movable backward or forward by supplying compressed air within the return air chamber from an air chamber passage hole 9 through air passages and to a fastening member feed cylinder or discharging such compressed air from the fastening member feed cylinder, a return spring for energizing the fastening member feed piston, and a feed pawl mounted on the leading end of the fastening member feed piston. In the driving machine, between the return air chamber and the fastening member feed cylinder, a filter portion is provided having a projection shape and small holes.

Abstract: A center portion of a handle housing portion 3 is arranged with a pressure reducing valve mechanism portion 50 for reducing a pressure of high pressure compressed air to be surrounded by an exhaust chamber 40, in a state of making a trigger 37 ON, air pressure P22 of a secondary pressure side port 52 of the pressure reducing valve mechanism portion 50 is made to be higher than air pressure P21 of a secondary pressure side port 52 of the pressure reducing valve mechanism portion 50 in a state of making the trigger 37 OFF by communicating a hermetically closed chamber 59a of a pressure control spring 56 and the exhaust chamber 40 by way of a relief hole 59b such that an exhaust air pressure of an air motor mechanism portion 10 is added to a spring force F of the pressure control spring 56 of the pressure reducing valve mechanism portion 50.

Abstract: A center portion of a handle housing portion 3 is arranged with a pressure reducing valve mechanism portion 50 for reducing a pressure of high pressure compressed air to be surrounded by an exhaust chamber 40, in a state of making a trigger 37 ON, air pressure P22 of a secondary pressure side port 52 of the pressure reducing valve mechanism portion 50 is made to be higher than air pressure P21 of a secondary pressure side port 52 of the pressure reducing valve mechanism portion 50 in a state of making the trigger 37 OFF by communicating a hermetically closed chamber 59a of a pressure control spring 56 and the exhaust chamber 40 by way of a relief hole 59b such that an exhaust air pressure of an air motor mechanism portion 10 is added to a spring force. F of the pressure control spring 56 of the pressure reducing valve mechanism portion 50.

Abstract: A nail gun having a contact arm normally biased in a direction away from a workpiece by compression springs. A free end of the contact arm is brought into abutment with a workpiece and a trigger is pulled for driving a nail thereinto. In the trigger pulling operation, an inner end of the contact arm is engaged with a trigger arm which is biased by a plunger spring through a plunger. Because the contact arm is held on the workpiece, the plunger is moved to provide ON state against biasing force of the plunger spring. Immediately after the nail driving, a nail gun body is moved in a direction away from the workpiece relative to the contact arm. This causes disengagement of the trigger arm from the inner end, to relatively move the nail gun body toward the workpiece by the biasing force of the compression springs. This means relative movement of the contact arm in the direction away from the workpiece.