JP6406568B2 - Driving operation method of power supply system for driving control of electric power tool - Google Patents

Description

The present invention directly connects or incorporates a battery pack that uses a secondary battery or a power pack in which a plurality of capacitors are combined as a power supply device for driving means such as an electric motor that drives an electric tool, to a gripping case of the electric tool. Without the need to improve the operability of the power tool by arranging the capacitor so that the power supply is the capacitor for the gripping case of the power tool body, with a configuration and configuration that has a minimum form and weight. The present invention relates to a driving operation method of a power supply system that controls the driving of an electric tool that can be operated .

  Conventionally, for example, in a cordless power tool, a battery pack made of a secondary battery such as a nickel-cadmium battery or a nickel-hydrogen battery is used as a power source of a built-in motor, and such a battery pack is used as a cordless power tool body. It is configured to be detachably mounted. And when this secondary battery is exhausted, remove the battery pack from the cordless power tool body directly or connect to the dedicated battery charger and use it repeatedly. Is common.

  However, in recent years, in this type of cordless power tool, needs for power-up such as improvement of work speed and work amount increase by one charge have increased, and the battery has inevitably become larger. For this reason, the total weight of an electric tool becomes heavy, and when an operator works with one hand, the problem that operativity worsens arises.

  Therefore, a technique has been proposed that allows the user of the power tool to use the power tool main body and the battery (battery) separately so that the weight felt during use can be reduced. Yes. For example, a battery holster (portable power source) capable of holding and connecting a battery corresponding to the battery insertion port provided in the main body of the electric tool is provided, and the battery holster is inserted into the battery holster via an electric cord. An adapter that can be connected to the opening is provided, and the adapter is inserted into the battery insertion slot, or a jack is provided separately from the battery insertion slot on the tool body, and the plug of the electric cord is directly inserted into the jack. Thus, there has been proposed a power tool that uses a battery separately from the main body (see Patent Document 1).

  Further, in the same manner as described above, a power tool that can be used for a long time without dramatically increasing the weight of the tool is provided. A battery pack is mounted on a belt, and the belt is attached to clothing. A portable power tool has been proposed that allows the use of a power tool by attaching and holding it, and connecting the electric cable led out from the battery pack to a power tool held in the hand of an operator. (See Patent Document 2).

  In response to the above-mentioned demands for power up and reduction of total weight in the cordless power tool, the disadvantage of the power tool using the conventional secondary battery is solved by charging the electric double layer capacitor and using it as a power source. Various cordless power tools configured to be able to be used have been proposed.

  For example, a portable electric tool having a configuration including a power storage device including an electric double layer capacitor to which a secondary battery and a DC / DC converter are connected and a charging circuit for charging the electric double layer capacitor has been proposed. . The portable power tool configured as described above requires a conventional commercial power supply with almost the same amount of energy as a conventional secondary battery alone by combining a secondary battery and an electric double layer capacitor. Since the same power as that of the electric tool can be output, a rechargeable portable electric tool having high power and excellent operability and workability is configured (see Patent Document 3).

  A power source having a large-capacitance capacitor; a motor whose rotational speed is set according to a voltage from the power source; and a control circuit that controls the operation of the motor. A cordless system that is configured to control the motor at a constant speed based on the rotation speed detected by the rotation speed sensor when the capacitor voltage of the power supply is higher than the drive voltage of the motor. A type of power tool has been proposed. The electric power tool configured in this way can be charged / discharged by a large current instantaneously, and has a configuration that prevents the voltage from being lowered and the tool output from being lowered according to the discharge (see Patent Document 4). .

  In addition, as an improved power tool using the above-described conventional secondary battery, after the charged battery is exhausted by providing an adapter that can supply driving power from the charging device to the cableless electric device via the cable. However, there has been proposed an adapter for a charging device that allows a user to continue to use an electric device as a cable-type electric device without waiting for the battery to be charged again (see Patent Document 5). ).

  That is, the adapter for a charging device described in Patent Document 5 is an adapter that supplies charging power supplied from a charging device for charging a battery pack to a load made of an electrical device, and is connectable to the load side. A power supply device as a device-side adapter that incorporates a capacitor and supplies power to the load, and can be attached to the charging device to control the charging voltage of the charging device and to the capacitor of the power supply device via a power line (cable) And a connection device as a charging side adapter for supplying power.

Then, the applicant of the present invention provides a power pack that uses a capacitor instead of the conventional secondary battery as an improvement to the conventional proposal described above, and connects the capacitor of the power pack to an AC / DC power converter. The power tool can be used easily and appropriately as a power source, and the continuous operation process commensurate with the charging capacity of the capacitor and recharging with a relatively short pause can be repeated, and Capacitor power supply device that can be used continuously and can solve the problems associated with conventional power cord connection type power tools and cordless power tools that use secondary batteries A tool and its driving method were developed and a patent application was filed (see Patent Document 6).

Japanese Utility Model Publication No. 03-062783 Japanese Patent Application Laid-Open No. 11-221783 JP 2003-048177 A JP 2001-129769 A International Publication WO01 / 080396 JP 2010-263669 A

  Each of the electric power tool or power tool proposed in Patent Document 1 and Patent Document 2 described above can be used by separating the battery from the tool body, and the weight of the battery is removed from the tool body. There is an advantage that it can be made light and easy to handle.

  However, in such a system for connecting the battery power source, there is an advantage that the battery can be separated from the tool body and the tool can be reduced in weight to facilitate the work, but the battery power source can be used with a necessary holder, It is necessary to attach to a part of the worker's work clothes. For this reason, when the operator interrupts the work or temporarily suspends the work, the electric cord is connected and the electric tool and the battery are not disconnected. Workers cannot move freely by leaving them where they are needed. That is, the worker has the trouble of always holding the electric power tool together with the battery power source. Further, since the electric cord is exposed to the outside, there is a difficulty in getting in the way of work.

  Further, in the conventional battery power supply connection method, since the battery power supply is always connected to the power tool, an accident such as an inability to connect the power supply or an electric leakage occurs due to a defect in the electric cord or its connection tool or component. There are disadvantages such as unnecessary consumption of the battery power. Moreover, in the conventional battery power supply connection method, the operation of attaching / detaching the electric cord to / from the electric tool is troublesome, and even if the electric cord is disconnected, an unexpected accident occurs in the electric cord that is energized with the battery power source. There is a fear that handling of the electric tool becomes troublesome.

  On the other hand, in the cordless electric tools proposed in Patent Document 3 and Patent Document 4 described above, the time for continuous work cannot be increased, but depending on the arrangement of the connection circuit of the capacitors used. According to the type of work, it can be set so as to obtain the required power, and there is an advantage that the charging time for these capacitors can be remarkably shortened as compared with the secondary battery.

  However, as described above, in a conventional cordless power tool that uses a chargeable / dischargeable capacitor as a power source, it is necessary to frequently charge the capacitor, and thus it is still impossible to eliminate the use of a secondary battery. Currently, tools are manufactured. Therefore, when working with such a power tool, it is necessary to prepare a spare battery pack, replace the battery pack as necessary, and charge the spare battery pack in the meantime. There are difficulties such as increased costs and reduced work efficiency.

  Furthermore, the adapter for a charging device described in Patent Document 5 is configured to be connected to a charging device for charging a battery pack attached to a cordless electric tool, and is connected to the charging device. A charging-side adapter as a connecting device and a device-side adapter as a power supply device exchangeably connected to the battery pack of the electric tool, and connecting the charging-side adapter and the device-side adapter via a power line Thus, the electric tool is configured to be driven.

  Therefore, the adapter for the above-described charging device appropriately matches the device-side adapter in the circuit configuration of the charging-side adapter so that the charging device for charging the battery pack can be connected in common. Therefore, there are problems such as complicated design and configuration and complicated handling.

Therefore, the present inventor has conducted intensive studies and trial productions so that the handling of the electric power tool can be further simplified and the working efficiency by using the electric power tool can be further improved. In the power supply system for the electric tool according to 6, the capacitor provided in the power pack removably coupled to a part of the gripping case of the electric tool main body to obtain a required rotational torque (screw tightening torque) as the electric tool. When using a commercially available capacitor, for example, a volume corresponding to 3 to 4 single 1 or 2 single batteries is required, and the form and weight of the power pack is increased, which adversely affects operability. the omitted installed as an electric tool power pack detachably coupled to a portion of the grip casing body, the form of the gripping case and Within the limits which do not affect the operability for the amount, and attaching a relatively small capacitor to the drive control circuit of the power tool, a transformer for charging the capacitor connected to a commercial power source and By providing a large-capacity capacitor in the charging control device including the rectifier circuit, the capacitor built in the gripping case of the electric power tool body can be smoothly charged and discharged, and all the various problems described above are eliminated. We have succeeded in developing a power supply system that can control the power tool and its driving operation method .

In addition, as a power supply system for driving and controlling the electric tool, installation as a power pack removably coupled to a part of the gripping case of the electric tool body is omitted, and a power cord is connected to the gripping case. A power supply including a plurality of capacitors connected in series or in parallel at a position separated from the connection point of the electric power tool of the power cord within the range around the operator's body Also by providing a power pack as a repeater, it is possible to obtain a power supply system that drives and controls an electric tool that can solve all the various problems described above.

Therefore, in the power supply system for driving and controlling the electric tool provided with a small-capacity capacitor with respect to the driving control circuit of the electric tool as described above, a required screw tightening operation is performed when the electric tool is continuously driven for 10 to 20 seconds. The charging capacity of the small-capacitance capacitor is set so that the small-capacitance capacitor can be continuously operated, and the small-capacity capacitor is connected to a commercial power supply via the power cord via the power cord. The power supply is set so as to maintain a constant connection state, and when the power tool is stopped, the power supply from the large-capacity capacitor is set to enable charging of the small-capacity capacitor in a short time. It has been found that all the various problems of the prior art described above can be solved by driving the system .

Further, as a power supply system for driving and controlling the electric tool provided with a power supply pack as a power supply repeater incorporating a plurality of capacitors connected in series or in parallel as described above, the power supply pack is connected to a commercial power supply. A charge control device that includes a transformer and a rectifier circuit for charging the capacitor of the power supply and performs AC / DC power conversion and performs charge / discharge control of the capacitor of the power supply pack, and the power supply pack is provided to the charge control device. Is connected to the charge control device and the drive control circuit of the power tool as a power supply repeater via a power cord having a capacity corresponding to the charge capacity of the capacitor of the power pack. The charging capacity of the power pack capacitor is set so that the required screw tightening operation can be continuously performed during continuous driving. Both of the capacitors of the power supply pack are set so as to maintain a constant connection state via the power cord respectively to the charge control device connected to the commercial power supply and the drive control circuit of the power tool, and further the power tool All the above-mentioned various problems of the prior art as described above can be achieved by setting so that the charging of the capacitor of the power pack can be completed in a short time by supplying power from the charging control device during the stop operation of I found out that it can be resolved .

  In the case where the power pack is provided as described above, a small-capacity capacitor is provided to a part of the gripping case of the power tool body within a limit that does not affect the form and weight of the power tool drive control circuit. It is also possible to add it. Furthermore, in the case of providing a power pack as the power repeater, in the charging control device, without providing a small-capacity capacitor in the gripping case of the power tool body, or without providing the small-capacitance capacitor, By providing a large-capacity capacitor, the function of the capacitor provided in the power pack or the like in the electric tool can be more effectively exhibited.

Therefore, an object of the present invention is to omit the installation of a power pack or the like that is detachably connected to a part of the gripping case of the power tool body, and to connect the power cord directly to the drive control circuit of the power tool with respect to the gripping case. Power supply system in the power cord connection method and cordless method for conventional power tools by configuring the power supply consisting of the capacitor to the gripping case of the power tool body with a configuration and arrangement that will be the minimum form and weight It is an object of the present invention to provide a driving operation method of a power supply system for driving and controlling an electric tool that can solve the above problems.

In order to achieve the above object, a driving operation method of a power supply system for driving and controlling a power tool according to claim 1 of the present invention is small with respect to a gripping case of the power tool main body and a drive control circuit of the power tool. A capacitor having a capacity is provided , and a transformer and a rectifier circuit for charging the small-capacity capacitor by being connected to a commercial power source are provided to perform AC / DC power conversion and charge / discharge control of the small-capacitance capacitor. A charge control device including a control circuit provided with a large-capacity capacitor is provided, and a small-capacity capacitor provided in the drive control circuit of the electric tool and a large-capacity capacitor provided in the charge control device are combined with the small-capacity capacitor. In the power supply system that drives and controls the power tools that are directly connected to each other via a power cord having a capacity corresponding to the charging capacity of the capacitor ,
The charging capacity of the small-capacity capacitor is set so that the required screwing operation can be continuously performed during continuous driving of the electric tool for 10 to 20 seconds,
Setting the small-capacity capacitor to maintain a constant connection state via the power cord in the charging control device provided with the large-capacity capacitor connected to a commercial power supply,
When stopping the electric power tool, setting is made so that charging of the small capacity capacitor can be completed in a short time by supplying power from the large capacity capacitor .

Driving method of operating a power supply system for driving and controlling the electric tool according to claim 2 of the present invention, with respect to the grip casing of the power tool main body, the power pack constituted by connecting a plurality of capacitors in series or in parallel And a charge control device comprising a transformer and a rectifier circuit for charging a capacitor of the power supply pack connected to a commercial power supply, performing AC / DC power conversion and performing charge / discharge control of the capacitor of the power supply pack A power cord having a capacity corresponding to the charge capacity of the capacitor of the power pack is provided to the charge control apparatus and the drive control circuit of the electric tool with the power pack as a power relay for the charge control apparatus. In a power supply system that drives and controls power tools connected to each other via
Set the charging capacity of the capacitor of the power pack so that the required screw tightening operation can be continuously performed during continuous driving of the power tool,
The capacitor of the power supply pack is set so as to maintain a constant connection state through the power cord respectively to the charge control device connected to the commercial power supply and the drive control circuit of the electric tool,
When stopping the electric tool, the charging control device is set so that the charging of the capacitor of the power pack can be completed in a short time by supplying power from the charging control device .

Driving method of operating a power supply system for driving and controlling the electric tool according to claim 3 of the present invention, a power supply system for driving and controlling the power tool, to grip the case of the tool body, the drive control circuit of the power tool A small-capacity capacitor is provided, and the small-capacitance capacitor is connected to the charge control device via a required power cord, and the small-capacity capacitor And connected directly to each other via a power cord with a capacity suitable for the charging capacity of
The charging capacity of the small-capacity capacitor is set so that the required screwing operation can be continuously performed during continuous driving of the electric tool for 10 to 20 seconds,
The small-capacity capacitor is set to maintain a constant connection state via the power cord to the capacitor of the power pack connected to the commercial power source,
The electric power tool is set to be able to complete the charging of the small-capacity capacitor in a short time by supplying power from the capacitor of the power pack charged by the charging control device when the electric power tool is stopped .

According to the driving operation method of the power supply system for driving and controlling the electric tool according to claim 1 of the present invention, the conventional method of connecting a storage battery such as a battery, a condenser, an adapter, or the like in the form and weight of the electric tool. Therefore, the operability of the power tool is extremely good and the working efficiency can be improved.

In particular, in the driving operation method of the power supply system for driving and controlling the electric tool having the above-described configuration, for example, the electric motor is continuously driven for 10 to 20 seconds corresponding to the charging capacity of a small-capacitance capacitor provided on the electric tool side. -10 screw tightening operations are set to continue, and the capacitor is always connected to a charge control device provided with a large-capacitance capacitor connected to a commercial power source, and the electric tool is stopped. In this case, the power supply from the large-capacity capacitor can complete the charging of the small-capacitance capacitor on the electric tool side in a few seconds. The work can be achieved and the work efficiency can be improved by using the power tool.

According to the driving operation method of the power supply system for driving and controlling the electric tool according to claim 2 of the present invention, a plurality of capacitors are connected in series or in parallel to constitute a power supply pack, and connected to a commercial power supply. A charge control device including a transformer and a rectifier circuit for charging a capacitor of the power pack is provided, and the charge control device and a power tool drive control circuit with the power pack as a power relay for the charge control device, With the configuration in which the power tools are connected to each other, the form and weight of the electric tool can be reduced to the minimum form and weight as compared with the conventional method of connecting a storage battery such as a battery, a condenser, or an adapter. Therefore, as in the case described above, the operability of the power tool is extremely good, and the work efficiency can be improved.

According to the driving operation method of the power supply system for driving and controlling the electric power tool according to the present invention, when the power supply pack and the electric power tool are connected by the power cord, the power supply pack is within the range around the worker's body from the connection point of the electric power tool. By setting at a separated position, a lightweight power cord corresponding to the charging capacity of the capacitor of the power pack can be used as the power cord connected to the power pack, and the charge / discharge function of the capacitor of the power pack Therefore, it is possible to perform a work with a continuous electric tool so that the operator can always perform a safe and efficient work without impeding the operability of the electric tool.

Further , according to the driving operation method of the power supply system for driving and controlling the electric power tool of the present invention, the capacitor having a small capacity with respect to the driving control circuit of the electric power tool within a range not affecting each of the form and weight of the electric power tool. In this case, the drive control function of the electric power tool can be further expanded or improved by coexisting with the capacitor of the power supply pack.

Furthermore, according to the driving operation method of the power supply system for driving and controlling the electric power tool of the present invention, even in the charge control device for charging the power pack, a large-capacity capacitor with respect to the control circuit for performing charge / discharge control of the capacitor By providing this, the charging function for the capacitor of the power pack can be further expanded or improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the schematic circuit structure as a 1st embodiment of the power supply system which implements the method of driving-operating the electric tool which concerns on this invention. It is explanatory drawing which shows schematic structure about the connection state of the apparatus structure and electric tool of a power supply system shown in FIG. It is explanatory drawing which shows the schematic circuit structure as a 2nd embodiment of the power supply system which implements the method of driving-operating the electric tool which concerns on this invention. It is explanatory drawing which shows schematic structure about the apparatus state of the power supply system shown in FIG. 3, and the connection state of an electric tool. It is explanatory drawing which shows the schematic circuit structure as a 3rd embodiment of the power supply system which implements the method of driving-operating the electric tool which concerns on this invention .

Next, as an embodiment of the drive operation method of the power supply system for driving and controlling the electric tool according to the present invention, refer to the attached drawings in relation to the apparatus configuration of the power supply system for driving and controlling the electric tool for performing the drive operation . The details will be described below.

(First embodiment)
Figures 1 and 2 show a schematic circuit configuration as one embodiment of a power supply system for driving and controlling a power tool according to the present invention, a schematic and driving instructions for that of the device configuration, respectively.

  1 and 2, reference numeral 10 is an electric power tool, 30 is an AC / DC power conversion and charging / discharging control of a capacitor, and 40 is a commercial power source. The electric tool 10 is configured as an electric screwdriver including a driver bit that performs a tightening operation such as a screw. As shown in FIG. 1, the main body of the electric power tool 10 is provided with an electric motor 12 for rotationally driving the driver bit and a drive control circuit 14 for driving and controlling the electric motor 12. Reference numeral 16 indicates a drive switch of the electric motor 12.

The power supply system for driving and controlling the electric tool 10 has a small capacity capacitor with respect to the drive control circuit 14 of the electric tool 10 as long as the form and weight of the electric tool 10 do not affect the operability. 15 is provided. In order to charge the capacitor 15, a charge control device 30 including a transformer 32 and a rectifier circuit to perform AC / DC power conversion and a control circuit 34 to perform charge / discharge control of the capacitor is provided. A large-capacity capacitor 33 is provided for the control circuit 34 of the charging control device 30.

  In this way, the large-capacity capacitor 33 provided in the charge control device 30 is directly connected to the small-capacitance capacitor 15 provided in the drive control circuit 14 of the electric tool 10 via the power cord 36. Is done.

In the power supply system for driving and controlling the power tool in the present embodiment having the above-described configuration, the charging control device 30 is connected to the commercial power supply 40 via the commercial power supply connection plug 42 and the power switch 39 is turned on. Thus, the large-capacity capacitor 33 is charged, and the small-capacitance capacitor 15 provided in the power tool 10 is charged via the power cord 36, so that the operation standby state of the power tool 10 can be set. In this case, the electric capacity charged in the small-capacitance capacitor 15 is such that the drive switch 16 of the electric motor 12 in the electric power tool 10 is turned ON, and the electric motor 12 is continuously driven to maintain a discharge time suitable for performing the required work. Is set as follows.

  Therefore, when the drive switch 16 of the electric motor 12 in the electric tool 10 is turned ON, the electric motor 12 is driven via the drive control circuit 14 by the electric power charged in the small-capacitance capacitor 15, and the electric tool 10 is required. Can be done. Thus, after the electric power charged in the small-capacity capacitor 15 is discharged, the small-capacity capacitor can be obtained by turning off the drive switch 16 of the electric motor 12 together with the completion of the required work by the electric tool 10. 15 can be recharged in a short time by the large-capacity capacitor 33 of the charge control device 30.

  Therefore, according to the power supply system of the present embodiment, when the charging control device 30 and the power tool 10 are connected by the power cord 36, the small-capacitance capacitor 15 is changed from the large-capacity capacitor 33 to the small-capacitance capacitor 15. A lightweight power cord 24 corresponding to the charging capacity can be used, and it is possible to perform work with the continuous electric power tool 10 in conformity with the charging / discharging function of the small capacity capacitor 15.

For example, in the power supply system of the present embodiment, the motor 12 is continuously driven for 10 to 20 seconds corresponding to the charging capacity of the small-capacitance capacitor 15 provided on the electric tool 10 side, and 5 to 10 screw tightening operations are continued. The capacitor 15 is always connected to the charging control device 30 provided with the large-capacity capacitor 33 connected to the commercial power supply 40, and the large-capacity is set when the electric tool 10 is stopped. The power supply from the capacitor 33 can complete the charging of the small-capacitance capacitor 15 on the power tool 10 side in a few seconds, and the power tool 10 can be used substantially continuously by repeatedly stopping and operating for a short time. Can achieve an efficient work and contribute to the improvement of work efficiency by using the electric power tool 10.

(Second Embodiment)
3 and 4, a schematic circuit configuration of another embodiment of a power supply system for driving and controlling the electric power tool according to the present invention, showing a schematic and driving instructions for that of the device configuration. In the present embodiment, for convenience of explanation, the same components as those in the embodiment shown in FIGS. 1 and 2 will be described with the same reference numerals.

  In this embodiment, as shown in FIG. 3 and FIG. 4, a power pack 20 is provided which is configured by connecting a plurality of capacitors 22 made of, for example, electric double layer capacitors in series or in parallel. Via a cord 36, a transformer 32 and a rectifier circuit for charging the capacitor 22 are provided, and AC / DC power conversion is performed, and a charge control device 30 having a control circuit 34 for controlling charge / discharge of the capacitor is connected. In addition, it is configured to be directly connected to a drive control circuit 14 that controls the drive of the electric power tool 10 via a power cord 24.

In the power supply system for driving and controlling the power tool in the present embodiment having the above-described configuration, the charging control device 30 is connected to the commercial power supply 40 via the commercial power supply connection plug 42 and the power switch 39 is turned on. Thus, the capacitor 22 of the power pack 20 is charged, and the power tool 10 can be set in a standby state. In this case, the electric capacity charged in the capacitor 22 of the power supply pack 20 is such that the drive switch 16 of the electric motor 12 in the electric power tool 10 is turned ON, and the electric motor 12 is continuously driven to maintain a discharge time suitable for performing the required work. Is set as follows.

  Therefore, when the drive switch 16 of the electric motor 12 in the electric tool 10 is turned ON, the electric motor 12 is driven via the drive control circuit 14 by the electric power charged in the capacitor 22 of the power pack 20, and required by the electric tool. Can be done. In this way, after the electric power charged in the capacitor 22 of the power pack 20 is discharged, the drive switch 16 of the electric motor 12 can be turned OFF together with the completion of the required work by the electric tool. The capacitor 22 can be recharged in a short time by the charge control device 30.

  Therefore, according to the power supply system of the present invention, when the power pack 20 and the power tool 10 are connected by the power cord 24, the power pack 20 is separated from the connection point of the power tool 10 within a range around the operator's body. For example, by setting the distance of about 1 m from the connection point, the power cord 24 can be used as a lightweight power cord 24 corresponding to the charging capacity of the capacitor 22 of the power pack 20. It is possible to perform a continuous operation with the electric power tool 10 in conformity with the charge / discharge function of the capacitor 22.

  Similarly to the case described above, the power cord 36 that connects the power pack 20 and the charge control device 30 also supplies power for charging the capacitor 22 of the power pack 20, so that it matches the charge capacity of the capacitor 22. A lightweight power cord 36 can be used.

  Further, when the operation by the electric power tool 10 is performed by operating the drive switch 16 for driving the electric motor 12 of the electric power tool 10, the electric motor 12 has a time corresponding to the charging capacity of the capacitor 22 of the power pack 20. The capacitor 22 is always connected to the charging control device 30 via the commercial power supply 40. When the drive switch 16 is turned off, the capacitor 22 is set to be charged in a short time. In this way, the power tool 10 can be used continuously by repeating the ON / OFF operation of the drive switch 16 in a relatively short time.

(Third embodiment)
FIG. 5 shows a schematic circuit configuration as still another embodiment of the power supply system for driving and controlling the electric tool according to the present invention, and a modification of the power supply system for driving and controlling the electric tool having the configuration shown in FIG. An example is shown. Therefore, in this embodiment, for convenience of explanation, with the same components as the circuit configuration shown in FIG. 1 and FIG. 3 described above, will be described respectively by the same reference numerals. Therefore, the schematic configuration of the connection configuration between the power supply system and the power tool in this embodiment is as shown in FIG.

In the embodiment shown in FIG. 5, in the configuration of the electric power tool 10 shown in FIG. 3 described above, the drive control of the electric power tool 10 is within a range that does not affect the operability of the form and weight of the electric power tool 10. The circuit 14 is provided with a small-capacitance capacitor 15 in the same manner as the actual turning mode shown in FIG. As described above, the small-capacitance capacitor 15 is provided, and the drive control function of the electric power tool 10 can be further expanded or improved by being provided with the capacitor 22 of the power pack 20.

Further, in the embodiment shown in FIG. 5, in the configuration of the charging control device 30 shown in FIG. 3 described above, charging / discharging is performed on the power supply pack 20 as a power supply relay connected via the power supply cord 36. It is possible to provide a large-capacity capacitor 33 for the purpose. Thus, by providing the large-capacity capacitor 33 in the charge control device 30, the charging function for the capacitor 22 of the power pack 20 can be further expanded or improved. When the large-capacity capacitor 33 is provided, the capacitor 15 provided for the drive control circuit 14 of the electric tool 10 can be omitted, and of course, both the capacitors 15 and 33 can be provided. It is.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and many design changes can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Electric tool 12 Electric motor 14 Drive control circuit 15 Small capacity capacitor 16 Drive switch 20 Power pack 22 Capacitor 24 Power cord 30 Charge control device 32 Transformer 33 Large capacity capacitor 34 Control circuit 36 Power cord 38 Power switch 40 Commercial power source 42 Plug for commercial power connection

Claims (3)

To grip the case of the electric tool main body, provided with a small capacitor to the drive control circuit of the power tool, comprises a transformer and a rectifier circuit for charging the capacitor of the small capacity connected to a commercial power source A charge control device including a control circuit provided with a large-capacity capacitor that performs AC / DC power conversion and performs charge / discharge control of the small-capacitance capacitor is provided, and a small-capacity provided in the drive control circuit of the electric tool is provided. In a power supply system for driving and controlling an electric tool in which a capacitor and a large-capacity capacitor provided in the charge control device are directly connected to each other via a power cord having a capacity corresponding to the charge capacity of the small-capacitance capacitor ,
The charging capacity of the small-capacity capacitor is set so that the required screwing operation can be continuously performed during continuous driving of the electric tool for 10 to 20 seconds,
Setting the small-capacity capacitor to maintain a constant connection state via the power cord in the charging control device provided with the large-capacity capacitor connected to a commercial power supply,
Driving operation of a power supply system for controlling driving of the electric tool , wherein the electric power tool is set to enable charging of the small-capacity capacitor in a short time by power supply from the large-capacity capacitor when stopping the electric tool Way . To grip the case of the electric tool main body, provided with a power pack constituted by connecting a plurality of capacitors in series or in parallel, a transformer for charging the power pack of the capacitor connected to a commercial power source and A rectifier circuit is provided for performing AC / DC power conversion and charging / discharging control of the capacitor of the power supply pack is provided , and the charge control device is electrically connected to the charge control device using the power supply pack as a power supply repeater. In a power supply system for driving and controlling a power control tool connected to each other via a power cord having a capacity corresponding to the charging capacity of the capacitor of the power supply pack with respect to the drive control circuit of the tool,
Set the charging capacity of the capacitor of the power pack so that the required screw tightening operation can be continuously performed during continuous driving of the power tool,
The capacitor of the power supply pack is set so as to maintain a constant connection state through the power cord respectively to the charge control device connected to the commercial power supply and the drive control circuit of the electric tool,
A drive operation method for a power supply system for driving and controlling a power tool , characterized in that, when stopping the power tool, the charging of the capacitor of the power pack can be completed in a short time by feeding power from the charge control device. . As a power supply system for driving and controlling the power tool, to grip the case of the electric tool main body, provided with a small capacitor to the drive control circuit of the power tool, the calibration Pashita of the small capacity, the charging control device With respect to the capacitor of the power pack as a power relay connected via a required power cord, it is configured to be directly connected to each other via a power cord having a capacity corresponding to the charging capacity of the small capacity capacitor,
The charging capacity of the small-capacity capacitor is set so that the required screwing operation can be continuously performed during continuous driving of the electric tool for 10 to 20 seconds,
The small-capacity capacitor is set to maintain a constant connection state via the power cord to the capacitor of the power pack connected to the commercial power source,
3. The setting is made so that the charging of the small-capacity capacitor can be completed in a short time by feeding power from the capacitor of the power pack charged by the charging control device when the electric power tool is stopped. Drive operation method of the power supply system for driving and controlling the electric tool.

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