JP5333836B2 - Electric tools and power tools - Google Patents

Description

  The present invention relates to an electric tool and a power tool.

  Known as power tools such as electric tools are circular saws and grinders that perform operations with rotating blades and grindstones. In addition, an electric or combustion type driving machine that drives a nail into a material to be driven with an accelerated plunger by releasing the spring biased plunger against the spring biasing force and then releasing it is used. ing. For example, an electric driving machine for driving a nail into a driven material with an accelerated plunger by transmitting an inertial force of a flywheel driven by a motor to a plunger through a clutch is known (for example, a patent Reference 1).

  In such a power tool work, it is necessary to remove dust on the surface of the work member. Therefore, in a cutting machine that rotationally drives a saw blade, such as a circular saw, a cylindrical member is provided on the outer periphery of the cover that houses the saw blade, and the motor cooling air is exhausted forward in the cutting direction through the inside of the cylindrical member. There is also known a blower mechanism that blows off cutting chips on the cutting edge (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2008-119778 (pages 6-9, FIG. 1) Japanese Patent Laying-Open No. 2005-238822 (pages 18-20, FIG. 1)

  However, in the electric driving machine as described above, since the motor drive time is short, the blower cannot be continuously rotated, and thus there is a problem that wind cannot be generated effectively. In the circular saw air blowing mechanism, since the saw blade and the fan rotate as a unit, the wind can be produced only when the saw blade is moved. That is, there is a problem that only the blower is operated separately from the saw blade, and the dust at the target location cannot be blown off.

  Therefore, in order to solve the above-described problems, the present invention aims to provide an electric tool with a blowing function and a power tool capable of blowing air effectively and capable of blowing air independently of the original work. And

In order to achieve the above object, the invention described in claim 1 is a work that operates on a work member that is operated by the power of the motor, a motor that is provided in the housing, a switch that is operated by the user, and the motor. A reduction mechanism that decelerates the power of the motor, and a blower that is operated by the power of the motor and that blows out air toward the working part of the working unit during operation . A control unit that controls normal rotation and reverse rotation of the motor, and the control unit controls normal rotation and reverse rotation of the motor according to the operation of the switch, and either the working unit or the blower according to the normal rotation of the motor. One of the power tools operates, and either the working unit or the blower operates in accordance with the reverse rotation of the motor.

  According to such a configuration, the motor rotates normally or reversely according to the switch operation by the user, and either the working unit or the blower operates according to the rotation of the motor.

  The invention according to claim 2 is the invention according to claim 1, wherein the motor has a drive shaft that outputs power, and a first one-way clutch is interposed between the working portion and the drive shaft, A second one-way clutch that transmits rotation in a direction opposite to that of the first one-way clutch is interposed between the blower and the drive shaft of the motor.

  According to such a configuration, the power of the motor is transmitted to the working unit via the first one-way clutch, and the power of the motor is transmitted to the blower via the second one-way clutch.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the working unit is any one of a blade, a grindstone, and a driving operation mechanism that performs a driving operation of a stopper. It is characterized by being.

  According to such a configuration, the circular saw, the grinder, and the driving machine are provided with the blower that operates independently of the work on the work member.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a blower switch different from the switch is provided, and the controller is configured to control the blower based on the input of the blower switch. It is characterized by controlling the operation.

  According to such a configuration, the blower is turned on / off by a blower switch different from the switch that operates the working unit.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the blower is a centrifugal fan.

  According to such a configuration, the blower blows out the air sucked from the outside in the direction in which the blowout port of the outer peripheral portion faces.

  According to the configuration of the first aspect, the control unit controls the normal rotation or reverse rotation of the motor, and can operate either the working unit or the blower according to the normal rotation or reverse rotation of one motor. In this way, the power can be provided with one system, so that the size of the apparatus can be prevented from increasing.

  According to the configuration of claim 2, in addition to the effect of claim 1, the rotation of the motor in a predetermined direction is transmitted to the working portion by the first one-way clutch, and the direction opposite to the predetermined direction is transmitted to the blower by the second one-way clutch. The rotation of the motor can be transmitted. Therefore, the working unit and the blower can operate using the power of the motor efficiently.

  According to the configuration of claim 3, in addition to the effect of claim 1 or 2, it is possible to configure a circular saw having a working portion as a blade, a grinder using a grindstone, a driving machine for driving a stopper, and the like. .

  According to the structure of Claim 4, in addition to the effect by Claims 1-3, it is possible to operate a fan suitably as needed by operating a ventilation switch, and it aims at efficiency of work and power. be able to.

  According to the structure of Claim 5, in addition to the effect by Claims 1-4, it is efficient in ventilation, it is small, it is possible to save space and to enlarge the freedom degree of an arrangement | positioning location.

  According to the configuration of the sixth aspect, since the working unit and the blower are driven by different powers, they can be controlled independently of each other. It is possible to blow air during operation by the working unit, during work by the working unit, or to operate only the blower when the working unit is not operating. Furthermore, it is possible to prevent power shortage when operating the working unit and the blower at the same time.

  As described above, according to the electric tool and the power tool of the present invention, it is possible to use the blower mechanism without operating the work mechanism that performs work on the work member. Dust can be blown away. In addition, it is not necessary to operate the working mechanism when using the blower mechanism, so that energy saving can be realized. Furthermore, the air blowing function can be realized even in an instantaneously operated tool such as an electric nailer. Therefore, there is an effect that the usability of the tool and the work efficiency are improved.

The partial see-through | perspective side view which shows the electric nail driver by the 1st Embodiment of this invention. The figure which shows the AA part cross section of FIG. The block diagram which shows the drive circuit of the electric nail driver by 1st Embodiment. The partial see-through | perspective side view which shows the electric nail driver by the 2nd Embodiment of this invention. The block diagram which shows the drive circuit of the electric nail driver by 2nd Embodiment.

  Hereinafter, an electric nailing machine according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the nail driver 1 is an electric type and is a power tool that performs a work of driving a nail 23 that is a stopper into a not-shown workpiece. The nailing machine 1 includes a housing 2 serving as an outer shell, a handle 3, a battery 4, a nose 5 provided on the front end side in the driving direction of the housing 2, a magazine 6, and a fan mechanism 110. It is mainly composed. Hereinafter, the direction in which the plunger 8 described later moves is defined as the vertical direction, and the direction in which the nail 23 is struck is defined as the downward direction.

  The housing 2 is made of a resin such as nylon or polycarbonate, and incorporates a motor 7, a plunger 8, a spring 9, and the like inside.

  The plunger 8 is urged by the spring 9 and is usually located at the lowest bottom dead center that contacts the damper 12. The position where the plunger 8 is pulled upward by the wire 16 connected at the wire locking point 16a and moved upward is called the top dead center. The plunger 8 is disposed so as to be movable between the top dead center side and the bottom dead center side of the housing 2. The plunger 8 has a blade 8a, and the tip of the blade 8a extends to a passage position defined in the nose 5 when driven. The spring 9 is installed between the plunger 8 and the rear end of the housing 2. The plunger 8 and the wire 16 are locked so as to be movable in the direction of the arrow in the figure, which is the expansion / contraction direction of the spring 9, and to be rotatable in the radial direction of the wire 16.

  The handle 3 is provided on the upper part of the housing 2 and extends from the surface of the housing 2 with the side surface of the housing 2 as a base end. A trigger 10 is provided at the base end of the handle 3 to control the driving of the motor 7. A trigger switch 24 is interlocked with the trigger 10. The controller 100 is a circuit that controls the operation of the electric nail driver 1 and is installed in the housing 2. The battery 4 is detachably provided on the handle 3, and supplies power to the motor 7 via the controller 100 by wiring arranged in the handle 3.

  The motor 7 is provided with an output shaft 71, and one end of the output shaft 71 is connected to a pulley 74 via a first one-way clutch 72. The first one-way clutch outputs when the output shaft 71 of the motor 7 rotates in the direction to wind up the wire 16 via the speed reduction mechanism 11, the gear 14, the compression release mechanism 18 and the drum 13 described later (hereinafter referred to as normal rotation). The rotation of the shaft 71 is transmitted to the pulley 74, and the rotation of the output shaft 71 is not transmitted to the pulley 74 when the output shaft 71 of the motor 7 rotates in the direction opposite to the forward rotation (hereinafter referred to as reverse rotation). Yes. The speed reduction mechanism 11, the gear 14, and the compression release mechanism 18 transmit the rotation in the forward rotation direction of the motor 7 transmitted to the pulley 74 to the drum 13 and rotate it. The drum 13 pulls the plunger 8 by winding up the wire 16 by rotation. The plunger 8 is configured to move to the top dead center while being compressed by the spring 9 by being pulled by the wire 16.

  The magazine 6 is provided across the nose 5 and the tip portion of the housing 2. A plurality of nails 23 are built in the magazine 6 in a bundle shape, and the nails are supplied into the passage of the nose 5. When the blade 8a moves to the tip side due to the bottom dead center side movement of the plunger 8, the nail in the passage of the nose 5 is ejected from the injection port 55 at the tip of the nose 5 by being pushed by the tip of the blade 8a. Then, it is driven into the driven member. Further, the distance of the passage in the nose 5 is formed larger than the length of the nail, and is a running section for accelerating the plunger 8 until the nail 23 comes into contact with the driven member.

  Next, the structure of the fan mechanism 110 that is a blower will be described with reference to FIG. 1 and FIG. 2 that is a cross-sectional view taken along the line AA of FIG. A fan rotating portion 111 of the fan mechanism 110 is connected to the other end of the output shaft 71 of the motor 71 via a second one-way clutch 73. The second one-way clutch 73 transmits the rotation of the output shaft 71 to the fan rotation unit 111 when the output shaft 71 of the motor 7 rotates reversely, and the rotation of the output shaft 71 when the output shaft 71 of the motor 7 rotates forward. Therefore, the rotation of the motor 7 in the reverse rotation direction is transmitted to the fan rotation unit 111 by the second one-way clutch 73. The fan mechanism 110 has a substantially cylindrical shape and is provided with a fan rotating unit 111 inside. The fan rotation unit 111 is a centrifugal fan configured by installing a plurality of blade rows, and is configured to suck air from a suction unit 112 formed in the fan mechanism 110 and to generate wind from a blowout port 113. A suction port 114 is provided at a position corresponding to the position of the suction part 112 of the housing 2 so as to be able to suck outside air.

  The air outlet 113 is installed so as to be close to the upper end portion of the flat surface of the magazine 6, and the wind that has exited from the air outlet 113 passes through the surface of the magazine 6 in a direction parallel to the outlet, that is, the lower side of FIG. You can go to and disperse dust. Since the direction in which the wind is blown from the outlet 113 is the same as the direction in which the nail is driven, the operator is easily conscious and easy to use. Furthermore, in the electric nail driver 1 according to the first embodiment, the vicinity of the motor 7 is the center of gravity of the product, and when the handle 3 is held, the magazine 6 side may face downward as shown in FIG. Many. Further, since dust often accumulates at a low position such as a floor surface, the work can be easily performed by the downward wind.

  Next, the drive circuit of the electric nail driver 1 will be described with reference to FIG. 3 which is a block diagram. In the electric nailing machine 1, a trigger switch 24 and a control circuit 102 are connected in series to a battery 4 serving as a power source. The electric nailer 1 also has a blower switch 115. The blower switch 115 includes an on / off switch 115b, a forward / reverse switching switch 115a, and a reverse rotation detection switch 115c for the control circuit 102 to detect reverse rotation. The forward / reverse switching switch 115a further includes switches 116a and 116b. These switches constituting the blower switch 115 operate integrally so that the connection is switched in conjunction with each other.

  The motor 7 is connected between the trigger switch 24 and the on / off switch 115b and the drain of the FET 101 via the forward / reverse switching switch 115a. The motor 7 is connected to the forward / reverse switching switch 115a so that the rotation direction is reversed by opening / closing the forward / reverse switching switch 115a. The connection state of the forward / reverse switching switch 115a in FIG. 3 indicates a state where the blower switch 115 is not pressed. At this time, the switch 115b and the switch 115c are opened, the switch 116a and the switch 116b are both connected to the terminal f side, and the motor 7 is in a forward rotating connection state. The gate of the FET 101 is connected to the control circuit 102, and the source is connected to the reference potential. An operation signal (not shown) of the compression release mechanism 18 is input to the control circuit 102. The control circuit 102 turns the FET 101 on and off and controls the motor 7 by inputting an operation signal to the gate of the FET 101 according to the operation of the trigger switch 24 and the operation signal from the compression release mechanism 18.

  Next, the stopper driving operation by the electric nail driver 1 according to the first embodiment will be described with reference to FIGS. 1 to 3. When the trigger switch 24 is turned on, the voltage of the battery 4 is applied to the control circuit 102, the FET 101 is turned on by the control circuit 102, and the motor 7 is energized. As shown in FIG. 3, when the blower switch 115 is not pressed and the connection of the forward / reverse switching switch 115a is connected to the terminal f side and the motor 7 is rotating forward, the motor 7 is rotating forward. The output shaft 71 of the motor 7 rotates the pulley 74 via the first one-way clutch 72. At this time, the second one-way clutch 73 idles and does not transmit power, so the fan rotating unit 111 does not rotate.

  On the other hand, the rotation of the pulley 74 causes the drum 13 to rotate via the speed reduction mechanism 11 and the compression release mechanism 18, and the plunger 8 is pulled by the wire 16 to move toward the top dead center while compressing the spring 9. . When the drum 13 winds up the plunger 8 to the top dead center via the wire 16, the connection between the drum 13 and the speed reduction mechanism 11 is released by the action of the compression release mechanism 18. As a result, the plunger 8 moves toward the injection port 55 by the biasing force of the spring 9. At this time, the nail 23 supplied from the magazine 6 to the nose 5 is driven into the driven member by the blade 8a. The control circuit 102 that senses the operation of the compression release mechanism 18 by the operation signal turns off the FET 101 and stops the motor 7. Thereby, one shot is completed.

  Next, the blower operation in the electric nail driver 1 according to the first embodiment will be described. During the blower operation, the trigger switch 24 is in an off state. At this time, the fan mechanism 110 is operated by turning on the blower switch 115. That is, when the blower switch 115 is turned on, the switches 116a and 116b of the forward / reverse switching switch 115a are both connected to the terminal r side, so that the motor 7 switches from the forward rotation state to the reverse rotation state shown in FIG. Then, the on / off switch 115b and the reverse rotation detection switch 115c are turned on, and the battery voltage is applied to the control circuit 102 via the on / off switch 115b. At this time, the reverse rotation detection switch 115c is connected to the control circuit 102. When the control circuit 102 detects reverse rotation by inputting the reference potential, the control circuit 102 stops detecting the operation signal of the compression release mechanism 18, and The FET 101 is continuously turned on. Thus, when the control circuit 102 turns on the FET 101, the motor 7 is connected to the battery 4 via the on / off switch 115b, the forward / reverse switch 115a and the FET 101 and rotates in the reverse direction.

  When the output shaft 71 of the motor 7 rotates in the reverse direction, the fan rotating unit 111 rotates via the second one-way clutch 73, and the air sucked from the suction ports 114 and 112 is blown from the blower port 113 to generate wind. On the other hand, since the first one-way clutch 72 runs idle and does not transmit power to the pulley 74, no driving operation is performed.

  As described above in detail, according to the electric nail driver 1 according to the first embodiment of the present invention, the first one-way clutch 72 and the second one-way clutch 73 are connected to the motor 7. When the trigger 24 is turned on, since the switches 116 a and 116 b of the forward / reverse rotation switch 115 are both connected to the f terminal, the motor 7 rotates forward and moves the plunger 8 via the first one-way clutch 72. As a result, the nail 23 is driven. When the blower switch 115 is turned on, since the switches 116 a and 116 b of the forward / reverse rotation switch 115 are both connected to the r terminal, the motor 7 rotates in the reverse direction and operates the fan mechanism 110 via the second one-way clutch 73. Let

  As described above, according to the electric nail driver 1, the fan mechanism 110 can be operated in a state where the trigger 24 is not turned on, so that there is a power saving effect and power can be used only for the fan mechanism 110. It is possible to secure a sufficient air volume. Since dust is scattered by the wind from the fan mechanism 110, the place where the nail 23 should be driven can be clearly recognized, and the aim can be easily determined. Further, since the air outlet 113 of the fan mechanism 110 faces the magazine 6 side and the position of the center of gravity is in the vicinity of the motor 7, the air outlet 113 is held when the electric nail driver 1 is held in the hand. It tends to naturally face the direction of the driven member. For this reason, the operation | work which blows away garbage and dust also becomes easy. Furthermore, the wind blown out from the blow-out opening 113 can be easily guided to the work member by being guided by the surface of the magazine 6 and can be efficiently blown.

  In the electric nail driver 1 according to the first embodiment, the plunger 8, the wire 16, the drum 13, the speed reduction mechanism 11, the gear 14, and the compression release mechanism 18 correspond to the working unit of the present invention, and the fan mechanism 110. Corresponds to the blower of the present invention. Further, the forward / reverse switching switch 115a and the controller 100 correspond to the control unit of the present invention.

  Hereinafter, an electric nail driver 300 according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. Portions that are the same as those in the first embodiment are given the same numbers, and redundant descriptions of the constituent operations are omitted.

  As shown in FIG. 4, in the electric nailing machine 300, the fan mechanism 120 is attached to the magazine 6. Other configurations of the electric nailer 300 are the same as the configurations of the electric nailer 1 other than the configurations of the first one-way clutch 72, the second one-way clutch 73, and the fan mechanism 120. The fan mechanism 120 has a fan rotating unit 121 and a blowout port 123 which are centrifugal fans having blade rows, and a fan motor 124 is built in the center. The fan rotating unit 121 is rotated by the rotation of the fan motor 124, and the wind blows out from the outlet 123. The outlet 123 is directed toward the outlet 55.

  Hereinafter, the operation of the electric nailer 300 will be described. As shown in the block diagram of FIG. 5, the electric nailer 300 includes a control circuit 202 and an FET 101 as the controller 200. In the electric nailer 300, the battery 4 as a power source, the trigger switch 24, and the control circuit 202 are connected in series with each other. The motor 7 is connected between the trigger switch 24 and the drain of the FET 101. The gate of the FET 101 is connected to the control circuit 202, and the source is connected to the reference potential. An operation signal (not shown) of the compression release mechanism 18 is input to the control circuit 202. The control circuit 202 turns the FET 101 on and off and controls the motor 7 by inputting an operation signal to the gate of the FET 101 in accordance with the operation of the trigger switch 24 and the operation signal from the compression release mechanism 18.

  The blower switch 125 and the fan mechanism 120 are connected to the battery 4 in series. When the blower switch 125 is pressed, the fan motor 124 is rotated to operate the fan mechanism 120, and wind is emitted from the outlet 123. With this wind, dust in the vicinity of the injection port 55 is scattered, so that the place where the nail should be driven can be clearly recognized, and the aim can be easily determined.

  As described above in detail, according to the electric nail driver 300 according to the second embodiment of the present invention, the fan mechanism 120 is provided on the magazine 6, and the outlet 123 is provided with the electric nail driver 300. It faces in the direction of the injection port 55. A blower switch 125 and a fan mechanism 120 are provided independently of the trigger 24 and the motor 7, and the fan mechanism 120 is driven by turning on the blower switch 125.

  As described above, according to the electric nail driver 300, the fan mechanism 120 can be operated independently without the trigger 24 being turned on, thus providing a power saving effect. Further, since the fan mechanism 120 can be operated independently regardless of whether the trigger 24 is on or off, it is possible to clean the work member before work. Such a wind from the fan mechanism 120 causes dust to be scattered, so that the place where the nail should be driven can be clearly seen and the aim can be easily determined. In addition, since the fan mechanism 120 is provided in the magazine 6 and the position of the center of gravity is in the vicinity of the motor 7, when the electric nail driver 300 is held in the hand, the air outlet 123 is naturally driven. Easy to face in the member direction. For this reason, the operation | work which blows away garbage and dust also becomes easy.

  In the electric nailing machine 300 according to the second embodiment, the plunger 8, the wire 16, the drum 13, the speed reduction mechanism 11, the gear 14, and the compression release mechanism 18 correspond to the working unit of the present invention, and the fan mechanism 120. Corresponds to the blower of the present invention. The electric power corresponds to the first power and the second power of the present invention, the controller 200 corresponds to the first control unit of the present invention, and the motor 124 corresponds to the second control unit of the present invention. Yes.

  The electric tool and the power tool according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, a two-way clutch or an independent motor and switch are used to drive the stopper and perform a blower operation. However, it is independent of other operations such as cutting with a circular saw or grinding with a grinder. The present invention can also be applied when providing a blower mechanism that can be operated in an automatic manner. As described above, the configuration of the working unit that performs the work on the work member of the tool is not limited to the above, and a tool having another configuration operation may be used.

  In the above-described embodiment, the electric nail driver has been described as an example. However, the present invention can be applied to other power, for example, a tool powered by combustion power.

1: Nailer 2: Housing 3: Handle 4: Battery 5: Nose 6: Magazine 7: Motor 8: Plunger 8a: Blade 9: Spring 10: Trigger 11: Reduction mechanism 13: Drum 14: Gear 16: Wire 16a: Wire locking part 23: Nail 24: Trigger switch 25: Stop switch 100: Controller 101: FET

Claims (5)

A housing;
A switch operated by the user;
A motor provided in the housing;
A working unit that operates by the power of the motor and works on a work member;
A speed reduction mechanism that is provided in the working unit and decelerates the power of the motor;
A blower that is operated by the power of the motor and has a blowout port that blows air toward the work site of the working unit during operation ;
A control unit for controlling forward rotation and reverse rotation of the motor;
Have
The control unit controls normal rotation and reverse rotation of the motor according to the operation of the switch,
One of the working unit and the blower operates according to the normal rotation of the motor, and the other of the working unit and the blower operates according to the reverse rotation of the motor. The motor has a drive shaft for outputting power,
A first one-way clutch is interposed between the working unit and the drive shaft,
2. The electric tool according to claim 1, wherein a second one-way clutch that transmits rotation in a direction opposite to that of the first one-way clutch is interposed between the blower and the drive shaft of the motor. The working unit is
The power tool according to any one of claims 1 to 2 , wherein the power tool is one of a blade, a grindstone, and a driving operation mechanism that performs a driving operation of a stopper. Provide a blower switch separate from the switch,
The said control part controls operation | movement of the said air blower based on the input of the said air blower switch, The electric tool as described in any one of Claims 1-3 characterized by the above-mentioned.   The power tool according to any one of claims 1 to 4, wherein the blower is a centrifugal fan.

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