WO2008013051A1 - Outil de travail - Google Patents

Outil de travail Download PDF

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Publication number
WO2008013051A1
WO2008013051A1 PCT/JP2007/063696 JP2007063696W WO2008013051A1 WO 2008013051 A1 WO2008013051 A1 WO 2008013051A1 JP 2007063696 W JP2007063696 W JP 2007063696W WO 2008013051 A1 WO2008013051 A1 WO 2008013051A1
Authority
WO
WIPO (PCT)
Prior art keywords
trigger
drive motor
work tool
control mode
trigger action
Prior art date
Application number
PCT/JP2007/063696
Other languages
English (en)
Japanese (ja)
Inventor
Masahiro Watanabe
Takeshi Nishimiya
Original Assignee
Makita Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Makita Corporation filed Critical Makita Corporation
Publication of WO2008013051A1 publication Critical patent/WO2008013051A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the present invention relates to a work tool construction technique.
  • Patent Document 1 discloses an electric grinder configured to drive a rotating turret for performing grinding and grinding operations by an electric drive motor.
  • this electric grinder when the operator operates a rotation speed setting knob provided on the upper part of the grinder body, the setting rotation speed of the drive motor is made variable, thereby controlling the rotation of the rotating turret. Is adopted! Speak.
  • Patent Document 1 Japanese Patent Laid-Open No. 2-262295
  • the present invention has been made in view of the above-described points, and is effective for smoothing a machining operation in a working tool in which a tip tool for performing a machining operation on a workpiece is driven by a drive motor. It is an issue to provide a new technology.
  • a work tool includes at least a main body, a tip tool, a drive motor, a hand grip, a trigger, and a control unit.
  • the tip tool of the present invention is configured as a tool that is disposed at the tool tip of the main body portion and performs a processing operation of a workpiece, and is used for various operations such as polishing, polishing ij, and cutting.
  • the drive motor of the present invention is housed in the main body, and is configured as a motor that drives the tip tool by supplying power.
  • a mechanism for transmitting the rotational force of the drive motor to the tip tool is appropriately disposed between the drive motor and the tip tool.
  • the “power source” here, a battery power source mounted on the tool body or an external power source connected to the drive motor through a power cord is used.
  • the handgrip of the present invention is provided in the main body and is configured as a handgrip that is gripped by an operator when using a tool, that is, a part to which the gripping force (grip force) of the worker is applied.
  • the on-position force that is in the activated state is biased toward the off-position that is in the deactivated state, and the off-position force can be pulled to the on position by one or more fingers of the operator holding the handgrip.
  • control unit of the present invention controls the drive motor to the operating state by pulling the trigger to the on position, and creates the drive motor by operating the trigger to return to the off position.
  • control unit of the present invention has a function which makes the setting regarding the operation mode of a work tool variable according to the operation mode of the trigger by the operator's finger holding the hand grip.
  • the setting related to the working mode of the work tool the setting related to the operating mode in the operating state of the drive motor or the irradiation device that irradiates the work material
  • the setting relating to the operating mode of the irradiation apparatus corresponds to this.
  • settings related to the operation mode in the operating state of the drive motor typically, the rotational speed (rotational speed) and rotational direction of the drive motor in the active state, and the normal rotational speed when the drive motor starts up. It is possible to appropriately set the soft start operation time that gradually increases to the maximum, the timing that defines the upper limit of the current value that is applied to the drive motor, and the timing that the drive motor is energized.
  • the operator operates the trigger without changing the work posture in the work posture while holding the handgrip, and in the operating state of the drive motor. It is possible to change the setting relating to the operation mode, and thus it is possible to achieve a smooth machining operation.
  • the operation mode of the trigger is defined by pulling the trigger to the on position again after the trigger is operated to return the on position force to the off position, or the trigger is turned to the off position force on position. It is preferable to include a predetermined trigger action defined by returning to the off position again after the pull operation.
  • the control unit sets the rotational speed of the drive motor every time the predetermined trigger action is performed within a predetermined time as a setting relating to the operation mode in the operation state of the drive motor.
  • the configuration has a control mode for switching the setting. That is, in this control mode, the rotational speed setting of the drive motor is switched according to the time required for a predetermined trigger action.
  • control mode typically, settings such as a setting in which the rotational speed of the drive motor is increased stepwise or alternatively to a high rotation side, or a setting that gradually or alternatively decreases to a low rotation side are appropriately adopted. can do. According to such a configuration, it is possible to perform control for switching the rotational speed setting of the drive motor to a desired state according to the time required for a predetermined trigger action.
  • the control unit switches the rotation speed setting of the drive motor according to the number of repetitions of the trigger action within a predetermined time with respect to the predetermined trigger action.
  • the control mode is used. As this control mode, typically, as the number of repetitions of the trigger action increases, the drive motor rotation speed is increased stepwise, or the drive motor corresponding to the number of repetitions of the trigger action is increased. Settings such as alternatively selecting the number of revolutions can be adopted as appropriate. According to such a configuration, it is possible to perform control for switching the rotational speed setting of the drive motor to a desired state in accordance with the number of repetitions of a predetermined trigger action within a predetermined time.
  • the control unit has a control mode for switching the rotational speed setting of the drive motor in accordance with the operation speed of the predetermined trigger action. It is made.
  • this control mode typically, when a switch with sliding resistance is used as a trigger and the operation speed of the trigger action is relatively fast (sliding resistance changes with time), the rotational speed of the drive motor When the operation speed of the trigger function is relatively slow (the time variation of the sliding resistance is small), the drive motor speed is gradually reduced to the low speed side.
  • a work tool capable of controlling the setting of the rotational speed of the drive motor to a desired state according to the operation speed of a predetermined trigger action.
  • the control unit gradually increases the rotational speed to the normal rotational speed when the drive motor is started each time the predetermined trigger action is performed within a predetermined time.
  • the control mode is configured to switch the soft start operation time. As this control mode, typically, when the time required for the trigger action is relatively short, the soft start operation time is changed, and when the time required for the trigger action is relatively long, the soft start operation is performed. Settings that maintain time, settings that selectively select the soft start operation time corresponding to the time required for the trigger action, and the like can be appropriately employed. According to such a configuration, it is possible to perform control for switching the soft start operation time of the drive motor to a desired state according to the time required for a predetermined trigger action.
  • the control unit includes a current limiter capable of defining an upper limit of a current value energized to the drive motor, and the predetermined trigger action is performed within a predetermined time.
  • a control mode for switching the operation of the current limiter.
  • the current limiter typically, when the time required for the trigger action is relatively short, the current limiter switches between the activated state and the non-activated state, and the time required for the trigger action is relative. If the current limiter is long, the setting to maintain the current limiter's operating state or inactive state, or the setting to selectively select the upper limit of the current value corresponding to the time required for the trigger action should be adopted as appropriate. Can do. According to such a configuration, the current limiter is activated according to the time required for a predetermined trigger action. Control to switch to a desired state is possible.
  • the control unit includes a lock-on mechanism capable of maintaining the energized state of the drive motor, and according to the number of repetitions of the predetermined trigger action within a predetermined time.
  • a control mode for switching the operation of the lock-on mechanism is provided.
  • a setting for setting the lock-on mechanism in an activated state or a non-activated state according to the number of times the trigger action is repeated can be appropriately employed. According to such a configuration, it is possible to control the operation of the lock-on mechanism to a desired state according to the number of repetitions of a predetermined trigger action within a predetermined time.
  • the work tool according to a further embodiment of the present invention further includes an irradiation device that irradiates the workpiece.
  • the “irradiation device” here includes a wide range of devices that emit light toward the workpiece, and typically includes not only LEDs, lamps and fluorescent lamps that illuminate the workpiece, but also rounds. Lasers used to align black lines on workpieces in saws and other work tools are used as irradiation devices.
  • the control unit makes the setting relating to the operation mode of at least one of the drive motor and the irradiation device variable according to the operation mode of the trigger by the finger of the operator holding the handgrip. It is supposed to be configured. Typically, the timing for switching the irradiation device between the irradiation state and the non-irradiation state, the illuminance (degree of brightness) of the irradiation device, and the like can be appropriately set. According to such a configuration, the operator operates the trigger without changing the work posture while holding the hand grip, and operates at least the drive motor and the irradiation device in the operation state of the drive motor. The setting relating to one of the operation modes can be changed, so that the machining operation can be smoothly performed.
  • the control unit irradiates the irradiation device every time the predetermined trigger action is performed within a predetermined time as a setting relating to the operation mode of the irradiation device.
  • the control mode is switched between a state and a non-irradiation state.
  • this control mode typically, when the time required for the trigger action is relatively short, the irradiation apparatus switches between the irradiation state and the non-irradiation state, and the trigger action is performed.
  • FIG. 1 shows the appearance of an electric grinder 100 that is an embodiment of a work tool according to the present invention.
  • the electric grinder 100 of the present embodiment is mainly composed of a tool main body 110, a main grip 120, a front grip 130, a drive motor 140, a drive mechanism 150, and a tip tool 160.
  • the tool main body 110 is configured to accommodate various electric system parts and mechanical system parts related to driving of the tip tool 160, including the drive motor 140 and the drive mechanism 150, in the housing 112.
  • the drive motor 140 is connected to the tip tool 160 via the drive mechanism 150 and is operated by power supply from an external power source (AC power source 210 described later), and the tip tool 160 is rotationally driven in the operating state. Is done.
  • the drive motor 140 corresponds to “a drive motor that drives the tip tool by power supply” in the present invention. It is also possible to adopt a configuration in which the drive motor 140 is operated by a notch power source mounted on the tool body.
  • the tool main body 110 referred to here constitutes the “main body” in the present invention.
  • the tool body 110 and the main grip 120 or the front grip 130 may be combined to be called a “main part”.
  • the main grip 120 is configured as a handle (also referred to as “main handle” or “rear handle”) provided on the rear side (right side in Fig. 1) of the housing 112 of the tool body 110. It is done.
  • the main grip 120 constitutes a portion to which the operator's gripping force (grip strength) extends, and this main grip 120 force corresponds to the “node grip” in the present invention.
  • the main grip 120 is typically gripped by an operator's dominant hand, and includes a trigger 122 for operating the drive motor 140 under the grip.
  • the trigger 122 is normally biased to an off position where the drive motor 140 is deactivated, and the operator force holding the main grip 120 overcomes the biasing force.
  • the trigger switch 122a described later is turned on and the operation of the drive motor 140 is started.
  • the trigger 122 returns to the off position with respect to the drive motor 140, and the trigger switch 122a described later is turned off, and the drive motor 140 operation is stopped.
  • the trigger 122 here corresponds to a “trigger” in the present invention.
  • the front grip 130 is configured as a nodule (also referred to as “auxiliary handle” or “front handle”) provided on the front side (left side in FIG. 1) of the tool main body 110.
  • the front drip 130 is configured to extend from the left front portion of the tool main body 110 in the left-right direction of the tool.
  • the front grip 130 is typically gripped by a hand opposite to the operator's dominant hand.
  • the tip tool 160 is configured as a rotating member that is rotationally driven when the rotational force of the driving motor 140 is transmitted through the driving mechanism 150, and specifically, a grinding stone, a cutting stone, a multi-purpose tool, and the like.
  • a disk, a flexible grindstone, a diamond wheel, a sanding disk, a wire brush, or the like is appropriately used.
  • the tip tool 160 here is the tool main body 110.
  • FIG. 2 shows a control circuit 151 constituting the drive mechanism 150 of the present embodiment.
  • the control circuit 151 mainly includes an AC power source 152, a control unit (controller) 153, a switch detection unit 154, a setting display unit 155, and a motor drive unit 156. It is made.
  • the control unit 153 is typically configured by a CPU (arithmetic processing unit), an input / output device, a storage device, a peripheral device, and the like.
  • the control unit 153 corresponds to the “control unit” in the present invention.
  • the switch detection unit 154 has a function of detecting the operation of the trigger switch 122a accompanying the operation of the trigger (trigger 122 in FIG. 1) and outputting the detection signal to the control unit 153.
  • the setting display unit 155 is configured as a digital or analog display means.
  • the motor drive unit 156 is configured using a semiconductor switch and has a function capable of controlling the power supplied to the drive motor 140.
  • the control unit 153 Based on the input signal from the switch detection unit 154, the control unit 153 outputs a control signal for the drive motor 140 to the motor drive unit 156, while the display signal of the contents related to the control is mechanically or triggered by the trigger operation. Outputs to the setting display unit 155 in conjunction with the electrical type.
  • the rotation speed of the drive motor 140 is controlled to a predetermined setting, and the contents of the setting are displayed on the setting display unit 155.
  • the trigger action is performed by pulling the trigger 122 back to the on position after the trigger 122 is turned back to the off position (hereinafter also referred to as “first trigger action”). It is assumed that the rotational speed setting of the drive motor 140 is switched according to the above.
  • first trigger action refers to FIGS. 3 to 7 for the control modes A to E of the drive motor 140.
  • FIGS. 3 to 7 Each of the control modes shown in FIGS. 3 to 7 is indicated by the relationship between the operation mode related to the first trigger action of the trigger 122 by the operator and the rotational speed setting of the drive motor 140.
  • the drive motor 140 has the upper limit number of rotations with the second and third rotation numbers sandwiched from the first rotation number that is the lower limit number of rotations with respect to the rotation number setting. Up to 4 speeds, total 4 speeds.
  • the set rotational speed of the drive motor 140 is stepwise between the first rotational speed and the fourth rotational speed. Changed (also called “shift”). Specifically, as shown in FIG. 3, a timer (not shown) is activated on the condition that the SW ON force is also switched to SW OFF, and counts a predetermined time ⁇ tO set in advance. Each time the operator performs the first trigger action of the trigger 122 within a predetermined time ⁇ ⁇ ⁇ until the rotation speed of the drive motor 140 reaches the fourth rotation speed that is the upper limit rotation speed, The set number of revolutions increases by one step up to the fourth number of revolutions.
  • the set rotational speed of the drive motor 140 reaches the fourth rotational speed, every time the operator performs the first trigger action of the trigger 122 within the predetermined time ⁇ , the set rotational speed of the drive motor 140 is set.
  • the number 4th rotational force also decreases to the 1st rotational speed step by step.
  • the rotation speed setting of the drive motor 140 is switched according to the time required for the first trigger action of the trigger 122, and when the first trigger action is repeated, the first rotation speed force
  • the step of increasing the rotational speed up to the fourth rotational speed and the step of decreasing the rotational speed setting of the fourth rotational speed to the first rotational speed are sequentially repeated.
  • this control mode A if the first trigger action of the trigger 122 is not performed within the predetermined time ⁇ , the rotation speed setting of the drive motor 140 is maintained or reset to the initial setting. Is done.
  • This control mode ⁇ corresponds to “a control mode in which the rotation speed setting of the drive motor is switched every time the trigger action is performed within a predetermined time”.
  • the number of rotations of the drive motor 140 depends on the trigger action in which the trigger 122 is pulled back to the off position after the trigger 122 is pulled to the on position. It is also possible to adopt a control mode that switches settings. [0029] (Control mode B)
  • the set rotational speed of the drive motor 140 is linked to the first rotational speed and the fourth rotational speed in conjunction with the first trigger action of the trigger 122. It is changed step by step between the rotation speeds. Specifically, as shown in FIG. 4, the timer counts a predetermined time ⁇ tO on the condition that the switch is switched from SW on to SW off. Then, until the set rotational speed of the drive motor 140 reaches the fourth rotational speed, if the operator performs the first trigger action of the trigger 122 within the predetermined time ⁇ , the set rotational speed of the drive motor 140 is reached. However, the 1st rotational force also increases step by step up to the 4th rotational frequency.
  • the set rotational speed of the drive motor 140 reaches the fourth rotational speed
  • the set rotational speed of the drive motor 140 is set. Decreases to the 4th rotation speed and the 1st rotation speed, and then increases to the 1st rotation speed and the 4th rotation speed again. That is, in this control mode ⁇ , when the first trigger action of the trigger 122 is repeated, the step of increasing the rotational speed from the first rotational speed force to the fourth rotational speed is repeated.
  • this control mode ⁇ when the first trigger action of the trigger 122 is not performed within the predetermined time ⁇ , the rotation speed setting of the drive motor 140 is maintained or reset to the initial setting.
  • This control mode ⁇ corresponds to “a control mode in which the rotational speed setting of the drive motor is switched every time the trigger action is performed within a predetermined time”.
  • the rotational speed of the drive motor 140 is set according to the trigger action that the trigger 122 is pulled back to the off position after the off position force is also pulled to the on position. It is also possible to adopt a control mode for switching between.
  • the set rotational speed of the drive motor 140 is stepped between the first rotational speed and the fourth rotational speed. Be changed. Specifically, as shown in FIG. 5, the timer counts a predetermined time ⁇ tO on the condition that the switch is switched from SW on to SW off. Then, until the set rotation speed of the drive motor 140 reaches the fourth rotation speed, if the operator repeats the first trigger action of the trigger 122 twice within the predetermined time ⁇ , the set rotation speed of the drive motor 140 is reached. Number 1 is also the first rotational force Increases by 1 step to 2 rpm.
  • the set rotational speed of the drive motor 140 increases by one step to the third rotational speed as well.
  • the set rotational speed of the drive motor 140 is increased by one step to the fourth rotational speed.
  • the operator performs the set rotational speed of the drive motor 140 once within the predetermined time ⁇ so that the set rotational speed of the drive motor 140 becomes the fourth rotational speed.
  • the first rotation force increases to the fourth rotation speed again in one step according to the number of repetitions of the first trigger function.
  • the rotation speed of the drive motor 140 is set to any one of the first to fourth rotation speeds according to the number of repetitions of the first trigger action of the trigger 122 within a predetermined time. It will be.
  • the rotation speed setting of the drive motor 140 is maintained or reset to the initial setting.
  • This control mode C corresponds to “a control mode in which the rotational speed setting of the drive motor is switched according to the number of repetitions of the trigger action within a predetermined time”.
  • the rotation speed of the drive motor 140 is set according to the trigger action that is triggered again when the trigger 122 is pulled to the off position and then to the off position.
  • a switching control mode can also be adopted.
  • the set rotational speed of the drive motor 140 is set between the first rotational speed and the fourth rotational speed in conjunction with the operation time required for the first trigger action of the trigger 122. It is changed step by step. Specifically, as shown in FIG. 6, when the time required for the first trigger action of the trigger 122 performed by the operator (hereinafter referred to as “SW off time”) is relatively short, for example, in FIG. In the case of Atl, the set rotational speed of the drive motor 140 increases by one step. On the other hand, when the time required for the first trigger action of the trigger 122 performed by the operator is relatively long, for example, when it is At 2 in FIG. 6, the set rotational speed of the drive motor 140 decreases.
  • this control mode D the force for increasing the set rotational speed of the drive motor 140 based on the time required for the first trigger action of the trigger 122, or The key to be lowered will be determined.
  • a predetermined time is set in advance and the trigger is
  • the set speed of the drive motor 140 is increased by one step, and the time required for the first trigger action of the trigger 122 is preset. If it is longer than the set time (At2), the set rotational speed of the drive motor 140 is decreased by one step.
  • the rotational speed setting of the drive motor 140 is maintained or reset to the initial setting.
  • This control mode D corresponds to “a control mode in which the rotational speed setting of the drive motor is switched every time the trigger action is performed within a predetermined time”.
  • the rotation speed of the drive motor 140 is set according to the trigger action that the trigger 122 is pulled back to the off position after the off position force is pulled to the on position. It is also possible to adopt a control mode for switching between.
  • the set rotational speed of the drive motor 140 is linked to the first rotational speed and the fourth rotational speed in conjunction with the first trigger action of the trigger 122. It is changed step by step between the rotation speeds. Specifically, as shown in FIG. 7, when the time required for the first trigger action of the trigger 122 performed by the operator is the first time Atl, the rotation speed of the drive motor 140 is the first speed. When the rotation speed is set and the second time At2 is longer than the first time Atl, the rotation speed of the drive motor 140 is set to the second rotation speed.
  • the rotation speed of the drive motor 140 is set to the third rotation speed
  • the third time When the fourth time At4 is longer than At3, the rotation speed of the drive motor 140 is set to the fourth rotation speed.
  • the rotational speed of the drive motor 140 is selectively or alternatively set to one of the first to fourth rotational speeds. Will be.
  • this control mode ⁇ if the first trigger action of the trigger 122 is not performed within a predetermined time, the rotational speed setting of the drive motor 140 is maintained or reset to the initial setting.
  • This control mode ⁇ indicates that“ every time the trigger action is performed within a predetermined time, This corresponds to a “control mode for switching the rotational speed setting of the motor”.
  • the rotational speed of the drive motor 140 is set according to the trigger action that the trigger 122 is pulled back to the off position after the off position force is also pulled to the on position. It is also possible to adopt a control mode for switching between.
  • the rotational speed setting of the drive motor 140 is switched according to the switch sliding resistance at the time of the first trigger action of the trigger 122.
  • a control circuit of a different form control circuit 251 shown in FIG. 8 different from the control circuit 151 shown in FIG.
  • a trigger switch 222a with sliding resistance is adopted as a trigger switch associated with the operation of the trigger (trigger 122 in FIG. 1) instead of the trigger switch 122a shown in FIG.
  • the switch sliding resistance at the time of the first trigger action of the trigger 122 is detected.
  • the other components in the control circuit 251 are the same as those in the control circuit 151 shown in FIG.
  • control modes F to J of the drive motor 140 will be described with reference to FIGS. 9 to 13.
  • Each of the control modes shown in FIGS. 9 to 13 is indicated by the relationship between the sliding resistance in the first trigger action of the trigger 122 2 by the operator and the set rotational speed of the drive motor 140.
  • the sliding resistance value in the first trigger action of the trigger 122 is detected by the above-described trigger switch 22 2a.
  • the drive motor 140 is set in four stages in total from the first rotation speed that is the lower limit rotation speed to the fourth rotation speed that is the upper limit rotation speed with respect to the rotation speed setting. Have a number of turns.
  • control mode F corresponds to a “control mode for switching the rotational speed setting of the drive motor in accordance with the operation speed of the trigger action”.
  • the rotation speed of the drive motor 140 is changed according to the trigger action in which the trigger 122 is pulled back to the off position after the trigger 122 is pulled to the on position.
  • a control mode for switching the setting can also be adopted.
  • the set rotational speed of the drive motor 140 is set to the first rotational speed and the fourth rotational speed in conjunction with the detection of the specified sliding resistance at the time of the first trigger action of the trigger 122. It is changed step by step (also referred to as “shift”) between the rotation numbers. Specifically, as shown in FIG. 9, a timer (not shown) is activated on the condition that the switch has been switched from SW ON to SW OFF, and counts a preset predetermined time ⁇ tO. Then, until the set rotational speed of the drive motor 140 reaches the fourth rotational speed, the specified sliding resistance value (lOOkQ in Fig. 9) in the first trigger action of the trigger 122 is detected within a predetermined time ⁇ ⁇ .
  • the set rotational speed of the drive motor 140 increases by one step up to the fourth rotational speed.
  • the rotational speed setting up step from the rotational speed to the fourth rotational speed and the rotational speed setting down step to the fourth rotational speed force to the first rotational speed are sequentially repeated.
  • the set number of rotations of the drive motor 140 is linked to the detection of the specified sliding resistance at the time of the first trigger action of the trigger 122. It is changed stepwise between the first and fourth rotation speeds. Specifically, as shown in FIG. 10, the timer counts a predetermined time ⁇ tO on condition that the switch is switched from SW on to SW off. Then, until the set rotational speed of the drive motor 140 reaches the fourth rotational speed, the drive motor 140 is detected each time the specified sliding resistance value in the first trigger action of the trigger 122 is detected within the predetermined time ⁇ ⁇ ⁇ . With the set speed of 140, the first speed force is also increased step by step up to the fourth speed.
  • the setting speed of the drive motor 140 is the fourth speed. Force Decreases by 3 steps to the first rotation speed, then increases again by 1 step to the first rotation speed force to the 4th rotation speed. That is, in this control mode G, when the rotational speed setting of the drive motor 140 is switched according to the operation speed of the first trigger action of the trigger 122, and the first trigger action of the trigger 122 is repeated, the first trigger action is repeated. As for the rotational speed force, the rotational speed setting increase step up to the fourth rotational speed is repeated.
  • the set rotational speed of the drive motor 140 is set to the first rotational speed and the fourth rotational speed in conjunction with the number of detections of the specified sliding resistance at the time of the first trigger action of the trigger 122. It is changed step by step between the rotation speeds. Specifically, as shown in FIG. 11, the timer counts a predetermined time ⁇ tO on the condition that the switch is switched from SW on to SW off. Then, until the set rotational speed of the drive motor 140 reaches the fourth rotational speed, the specified sliding resistance value in the first trigger action of the trigger 122 is repeated twice within a predetermined time ⁇ tO. In this case, the set rotational speed of the drive motor 140 is increased by one step from the first rotational speed to the second rotational speed.
  • the set rotational speed of the drive motor 140 is the second rotational speed force, the third rotational speed.
  • the set rotational speed of the drive motor 140 becomes the third rotational speed. From 1 to 4th speed.
  • the specified sliding resistance value in the first trigger action is detected once within a predetermined time ⁇ tO to drive the motor.
  • the first rotational force is again decreased according to the number of detections of the specified sliding resistance value in the first trigger action.
  • the number of revolutions increases by one step up to the fourth number of revolutions. That is, in this control mode ⁇ , the rotational speed setting of the drive motor 140 is switched according to the operation speed of the first trigger function of the trigger 122, and the specified sliding resistance value in the first trigger action of the trigger 122 is changed. Based on the detected number of times, the rotational speed of the drive motor 140 is selectively or alternatively set to one of the first to fourth rotational speeds.
  • Control mode I In the control mode ⁇ of the second embodiment, the set rotational speed of the drive motor 140 is set to the first rotational speed and the fourth rotational speed in conjunction with the change time of the specified sliding resistance at the time of the first trigger action of the trigger 122. It is changed step by step between the rotation speeds. Specifically, as shown in FIG. 12, when the time required for the change of the specified sliding resistance value in the first trigger action of the trigger 122 is relatively short, for example, when it is Atl in FIG. The set speed of drive motor 140 increases by one level. On the other hand, when the time required to change the specified sliding resistance value in the first trigger action of the trigger 122 is relatively long, for example, when it is At2 in FIG.
  • the set rotational speed of the drive motor 140 is one step. Descend. That is, in this control mode D, the number of rotations of the drive motor 140 is increased according to the time required for the change of the specified sliding resistance value in the first trigger action of the trigger 122, that is, the operation speed of the first trigger action. Whether it is raised or lowered is set.
  • the set rotational speed of the drive motor 140 is linked to the change time of the specified sliding resistance at the time of the first trigger action of the trigger 122. It is changed stepwise between the first and fourth rotation speeds. Specifically, as shown in FIG. 13, when the time required for the change of the specified sliding resistance value in the first trigger action of the trigger 122 is the first time Atl, the rotational speed of the drive motor 140 is When the first rotation speed is set and the second time At2 is longer than the first time Atl, the rotation speed of the drive motor 140 is set to the second rotation speed.
  • the rotation speed of the drive motor 140 is set to the third rotation speed.
  • the rotation speed of the drive motor 140 is one of the first to fourth rotation speeds based on the time required for the change of the specified sliding resistance value in the first trigger action of the trigger 122. It will be set selectively or alternatively.
  • the first trigger action of the trigger 122 or the trigger 1 In response to a trigger action (also referred to as “second trigger action”) in which the motor 22 is pulled back from the off position to the on position and then back to the off position, the number of rotations of the drive motor 140 It is assumed that the setting other than is switched.
  • a trigger action also referred to as “second trigger action”
  • the number of rotations of the drive motor 140 It is assumed that the setting other than is switched.
  • the third embodiment will be described with reference to the control mode K to 0 force of the driving motor 140 and FIGS.
  • the soft start operation time of the drive motor 140 is set to be changed in conjunction with the first trigger action mode of the trigger 122. Specifically, every time the first trigger action of the trigger 122 is performed within a predetermined time, the set value of the soft start operation time is switched. That is, as shown in FIG. 14, when the time required for the first trigger action of the trigger 122 performed by the operator is relatively short, for example, when it is Atl in FIG. 14, the soft start operation of the drive motor 140 is performed. The time setting is switched between T1 and T2 (> T1). In addition, when the time required for the first trigger action of the trigger 122 performed by the operator is relatively long, for example, at At 2 in FIG.
  • the setting value of the soft start operation time of the drive motor 140 is Set to the same value as the previous soft start operation time setting.
  • the setting value of the soft start operation time is stored in a memory or the like and held.
  • the “soft start operation” here is an operation that gradually increases the rotation speed to the normal rotation speed when the drive motor 140 starts up, and the time until the operation is completed is defined as the “soft start operation time”. It is done.
  • the control mode K when the first trigger action of the trigger 122 is not performed within a predetermined time, the setting of the soft start operation time is maintained or reset to the initial setting.
  • This control mode K corresponds to “a control mode in which the soft start operation time for gradually increasing the rotation speed to the normal rotation speed when the drive motor is started every time the trigger action is performed within a predetermined time”.
  • a control mode that switches the setting of the soft start operation time of the drive motor 140 in accordance with the second trigger action of the trigger 122 can be adopted.
  • the driving is performed in conjunction with the switch operation mode of the trigger 122.
  • the operation mode of the current limiter of the dynamic motor 140 is set to be changed. Specifically, every time the second trigger action of the trigger 122 is performed within a predetermined time, the operation mode of the current limiter is switched between the operation state and the operation release state. That is, as shown in FIG. 15, when the time required for the second trigger action of the trigger 122 is relatively short, for example, when it is Atl in FIG. 15, the current limiter of the drive motor 140 is activated. When the time is relatively long, for example, when At 2 in FIG. 15, the current limiter of the drive motor 140 is either in the activated state or the deactivated state. Control to maintain.
  • the electric limiter used in this control mode L has a function of feedback-controlling the actual current so that the current supplied to the drive motor 140 does not exceed a preset predetermined current value in its operating state.
  • the operation mode of the current limiter is maintained or reset to the initial setting.
  • This control mode L corresponds to “a control mode in which the operation of the current limiter is switched every time the trigger action is performed within a predetermined time”.
  • a control mode in which the operating mode of the current limiter is switched in accordance with the first trigger action of the trigger 122 can be adopted.
  • the light operation mode is set to be changed in conjunction with the switch operation mode of the trigger 122. Specifically, every time the second trigger action of the trigger 122 is performed within a predetermined time, the operation mode of the light is switched between the operation state and the operation release state (non-operation state). That is, as shown in FIG. 16, when the time required for the second trigger action of the trigger 122 is relatively short, the light is switched between the activated state and the deactivated state, and the time is relatively long. In addition, control is performed to maintain the light in either the activated state or the deactivated state.
  • the operation mode of the light is maintained or reset to the initial setting.
  • the light used in this control mode M is configured as a means for irradiating the tip tool 160 or workpiece when the tool is used.
  • the lighting time and lighting intensity (brightness)
  • the light, laser, and fluorescent lamp here constitute an “irradiation device” in the present invention.
  • This control mode M is “whenever the trigger action is performed within a predetermined time, the irradiation device is in an irradiation state and a non-irradiation state. Corresponds to a “control mode for switching between” and “. As an example of changing this control mode M, a control mode in which the operation mode of the light is switched in accordance with the first trigger action of the trigger 122 can also be adopted.
  • the operating state of the drive motor 140 is locked (also referred to as “lock on”) in conjunction with the switch operation mode of the trigger 122, and the lock on state of the drive motor 140 is It is set to be unlocked (also called “lock-off”).
  • the drive motor 140 is switched between a lock-on state and a lock-off state according to the number of repetitions of the second trigger action of the trigger 122 within a predetermined time. That is, as shown in FIG. 17, by repeating the second trigger action of the trigger 122 twice within a preset predetermined time ⁇ , the subsequent operation state of the drive motor 140 is locked. Thereafter, the lock-on state of the drive motor 140 is released by performing the second trigger action of the trigger 122 once within a predetermined time ⁇ ⁇ set in advance.
  • This control mode ⁇ corresponds to “a control mode in which the operation of the lock-on mechanism is switched according to the number of repetitions of the trigger action within a predetermined time”.
  • a control mode is adopted in which the drive motor 140 is switched between the lock-on state and the lock-off state in accordance with the first trigger action of the trigger 122 described above.
  • the operating state of the drive motor 140 is locked (locked on) in conjunction with the switch operation mode of the trigger 122, and the drive motor
  • the 140 lock-on status is set to unlock (lock-off).
  • the second trigger action of trigger 122 is repeated within a predetermined time.
  • the drive motor 140 is switched between a lock-on state and a lock-off state. That is, as shown in FIG. 18, the second trigger action of the trigger 122 is repeated twice within a preset predetermined time ⁇ ⁇ ⁇ , thereby locking the subsequent operating state of the drive motor 140. Thereafter, when a predetermined time set in advance elapses, the lock-on state of the drive motor 140 is automatically released.
  • This control mode ⁇ corresponds to “a control mode in which the operation of the lock-on mechanism is switched according to the number of repetitions of the trigger action within a predetermined time”.
  • a control mode is adopted in which the drive motor 140 is switched between the lock-on state and the lock-off state in accordance with the first trigger action of the trigger 122 described above.
  • the fourth embodiment is a case where the first embodiment and the third embodiment are combined.
  • the control mode ⁇ of the drive motor 140 will be described with reference to FIG.
  • the control mode ⁇ in the fourth embodiment is a control mode in which a control mode similar to the control mode ⁇ in the first embodiment is combined with a control mode similar to the control mode M in the third embodiment.
  • the rotation speed of the drive motor 140 is changed stepwise between the first rotation speed and the fourth rotation speed.
  • the operation mode of the light that irradiates the workpiece is changed.
  • At 9 is used as the specified time of the second trigger action of the trigger 122, and the rotation speed of the drive motor 140 is changed.
  • the write operation force S matches the light setting, that is, when the switch action by the trigger 122 and the write operation are linked, it is described.
  • the second trigger action increases the rotational speed of the drive motor 140 stepwise. Control for increasing the set rotational speed of the drive motor 140 step by step. In addition, when the time required for the second trigger action of the trigger 122 is equal to or greater than AtlO, it is determined that the second trigger action is an operation for decreasing the rotation speed of the drive motor 140 step by step. Then, control is performed to decrease the set rotational speed of the drive motor 140 step by step.
  • control mode P As an example of changing the control mode P, the control mode for switching the rotational speed setting of the drive motor 140 in accordance with the second trigger action of the trigger 122 or the first trigger action of the trigger 122 is described. Therefore, it is possible to adopt a control mode that switches the operation mode of the light.
  • the set value is held while the trigger 122 pulling operation is released, and the next time the trigger 122 pulling operation is performed, the previous time. It is possible to configure to work according to the set value.
  • the set value can be reset when the time during which the pulling operation of the trigger 122 is released exceeds a certain time. In the first to fourth embodiments, the set value can be reset when the pull operation of the trigger 122 is released.
  • the setting display unit 155 displays and outputs a set value.
  • the setting display unit 155 described above can be an LED, lamp, display, or the like whose output mode is variable. More specific configurations include a configuration in which the number of LEDs and lamps indicating the set value are turned on or blinking, and a configuration in which information indicating the set value is displayed using colors, letters, numbers, symbols, and the like.
  • a speaker whose output mode is variable can be used.
  • the switching prevention mode can be set by performing a specific operation of the trigger 122 or an operation member different from the trigger 122.
  • the operator operates the trigger 122 while holding the main grip 120 without changing the work posture, and drives the drive motor. It is possible to change the setting relating to the operating mode in the 140 operating states and the setting relating to the operating mode in the operating state of the light, thereby making it possible to facilitate the machining operation.
  • an electric grinder used for polishing work or grinding work has been described as an example of a work tool, but the present invention is not limited to an electric grinder.
  • the present invention can be applied to various work tools having a configuration in which a tool can be set in a plurality of drive modes.
  • a configuration in which the tip tool is driven by a rechargeable or drive motor driven by an AC power supply can be employed.
  • FIG. 1 is a diagram showing an external appearance of an electric grinder 100 that is an embodiment of a work tool according to the present invention.
  • FIG. 2 is a diagram showing a control circuit 151 constituting the drive mechanism 150 of the present embodiment.
  • FIG. 3 is a diagram showing control relating to control mode A of the first embodiment.
  • FIG. 4 is a diagram showing control relating to control mode B of the first embodiment.
  • FIG. 5 is a diagram showing control relating to control mode C of the first embodiment.
  • FIG. 6 is a diagram showing control relating to control mode D of the first embodiment.
  • Fig. 7 is a diagram showing control relating to a control mode ⁇ in the first embodiment.
  • FIG. 8 is a diagram showing another form of control circuit 251 constituting drive mechanism 150 of the present embodiment.
  • FIG. 9 is a diagram showing control related to a control mode F of the second embodiment.
  • FIG. 10 is a diagram illustrating control related to a control mode G according to the second embodiment.
  • Fig. 11 is a diagram showing control relating to a control mode ⁇ in the second embodiment.
  • FIG. 12 is a diagram showing control related to control mode I of the second embodiment.
  • FIG. 13 is a diagram showing control relating to a control mode J of the second embodiment.
  • FIG. 14 is a diagram showing control relating to a control mode K of the third embodiment.
  • FIG. 15 is a diagram showing control relating to a control mode L of the third embodiment.
  • FIG. 16 is a diagram showing control relating to a control mode M of the third embodiment.
  • FIG. 17 is a diagram showing control relating to a control mode N of the third embodiment.
  • FIG. 18 is a diagram showing control relating to a control mode O of the third embodiment.
  • FIG. 19 is a diagram showing control relating to a control mode P of the fourth embodiment. Explanation of symbols

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

La présente invention a pour objet de proposer une technique efficace de polissage d'un outil de travail dans laquelle un outil d'extrémité de traitement du matériau d'une pièce est entraîné par un moteur d'entraînement. Dans une meuleuse électrique (100), un mode de travail dans un état de fonctionnement du moteur d'entraînement (140) peut être réglé par une action de déclenchement prédéterminée d'une gâchette (122) au niveau d'une poignée principale (120).
PCT/JP2007/063696 2006-07-25 2007-07-09 Outil de travail WO2008013051A1 (fr)

Applications Claiming Priority (2)

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JP2006-202599 2006-07-25
JP2006202599A JP2008023694A (ja) 2006-07-25 2006-07-25 作業工具

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JP2015515871A (ja) * 2012-05-04 2015-06-04 フェルコ・モーション・ソシエテ・アノニム 手持式電動工具
JP2017024122A (ja) * 2015-07-23 2017-02-02 リョービ株式会社 手持ち式電動工具
JP2017217731A (ja) * 2016-06-08 2017-12-14 リョービ株式会社 電動工具
CN110948347A (zh) * 2019-11-25 2020-04-03 宁波耀升工具实业有限公司 一种角磨
WO2023210258A1 (fr) * 2022-04-28 2023-11-02 工機ホールディングス株式会社 Machine de travail

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US7914167B2 (en) * 2008-08-01 2011-03-29 3M Innovative Properties Company Surface modifying apparatus having illumination system and method thereof
JP5605751B2 (ja) * 2010-06-30 2014-10-15 日立工機株式会社 携帯用切断機
JP5891431B2 (ja) * 2011-08-22 2016-03-23 パナソニックＩｐマネジメント株式会社 変速装置
CH705743A2 (de) 2011-11-14 2013-05-15 Illinois Tool Works Umreifungsvorrichtung.
CH705744A2 (de) * 2011-11-14 2013-05-15 Illinois Tool Works Umreifungsvorrichtung.
JP5924492B2 (ja) 2012-07-11 2016-05-25 日立工機株式会社 卓上切断機
JP5695166B2 (ja) * 2013-11-19 2015-04-01 株式会社マキタ 動力工具
JP7026305B2 (ja) * 2017-09-29 2022-02-28 マックス株式会社 電動工具
EP3560657A1 (fr) 2018-04-27 2019-10-30 3M Innovative Properties Company Machine d'usinange avec source de lumière pour éclairer la surface de travail
JP7259573B2 (ja) * 2019-06-14 2023-04-18 工機ホールディングス株式会社 電動工具

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US9872440B2 (en) 2012-05-04 2018-01-23 Felco Motion Sa Handheld power tool
JP2017024122A (ja) * 2015-07-23 2017-02-02 リョービ株式会社 手持ち式電動工具
JP2017217731A (ja) * 2016-06-08 2017-12-14 リョービ株式会社 電動工具
CN110948347A (zh) * 2019-11-25 2020-04-03 宁波耀升工具实业有限公司 一种角磨
WO2023210258A1 (fr) * 2022-04-28 2023-11-02 工機ホールディングス株式会社 Machine de travail

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