JPS57102709A - Magnetic boring machine - Google Patents
Magnetic boring machineInfo
- Publication number
- JPS57102709A JPS57102709A JP17641580A JP17641580A JPS57102709A JP S57102709 A JPS57102709 A JP S57102709A JP 17641580 A JP17641580 A JP 17641580A JP 17641580 A JP17641580 A JP 17641580A JP S57102709 A JPS57102709 A JP S57102709A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- circuit
- magnetic
- resistors
- electric magnet
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Drilling And Boring (AREA)
Abstract
PURPOSE: To prevent such an accident with a magnetic boring machine as being swung out by furnishing a magnetic flux sensing device at the magnetic circuit of an electric magnet base and refraining from supplying current to the motor- driven drilling machine in case the attracting force is not sufficient or none at all.
CONSTITUTION: Having a starter swtich 14 for the motor 15 to drive a motor- driven drilling machine, a magnetic sensind device 22 is composed of a hole element 10, constant-current power supply device 23, resistors 24, 25 and an amplifier circuit 26. This amplifier circuit 26 is composed of resistors 27-29 and a calculating circuit 30 while comparator circuit 31 is composed of resistors 32, 34, 35, a variable resistor 33 and a calculating circuit 36. The electric magnet base is fixed in attraction to a work to be processed in such arrangement that sufficiency of attractive force can be known from the lighting of an LED11 is so and that the LED will not light up if there is not sufficient attractive force. Even though the starter switch 14 for the motor 15 is turned on with the state above held, the oscillator circuit 49 does not operate and no power is supplied to the motor 15, so that the boring work can be carried out.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17641580A JPS57102709A (en) | 1980-12-12 | 1980-12-12 | Magnetic boring machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17641580A JPS57102709A (en) | 1980-12-12 | 1980-12-12 | Magnetic boring machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57102709A true JPS57102709A (en) | 1982-06-25 |
Family
ID=16013282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17641580A Pending JPS57102709A (en) | 1980-12-12 | 1980-12-12 | Magnetic boring machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57102709A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03126512U (en) * | 1990-01-26 | 1991-12-19 | ||
EP2251154A1 (en) | 2009-05-13 | 2010-11-17 | C. & E. Fein GmbH | Magnetic drill stand with retention force monitoring |
JP2020131322A (en) * | 2019-02-15 | 2020-08-31 | 日東工器株式会社 | Portable type machine tool |
JP2020131321A (en) * | 2019-02-15 | 2020-08-31 | 日東工器株式会社 | Portable type machine tool |
WO2021039186A1 (en) * | 2019-08-28 | 2021-03-04 | 日東工器株式会社 | Portable machining tool |
CN113600870A (en) * | 2021-09-06 | 2021-11-05 | 永康市晓诚电器有限公司 | Electric tool with protection device |
-
1980
- 1980-12-12 JP JP17641580A patent/JPS57102709A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03126512U (en) * | 1990-01-26 | 1991-12-19 | ||
EP2251154A1 (en) | 2009-05-13 | 2010-11-17 | C. & E. Fein GmbH | Magnetic drill stand with retention force monitoring |
DE102009022333A1 (en) | 2009-05-13 | 2010-11-18 | C. & E. Fein Gmbh | Magnetic drill stand with monitoring of the holding force |
US8545139B2 (en) | 2009-05-13 | 2013-10-01 | C & E Fein Gmbh | Magnetic drilling stand with holding force monitoring |
JP2020131322A (en) * | 2019-02-15 | 2020-08-31 | 日東工器株式会社 | Portable type machine tool |
JP2020131321A (en) * | 2019-02-15 | 2020-08-31 | 日東工器株式会社 | Portable type machine tool |
WO2021039186A1 (en) * | 2019-08-28 | 2021-03-04 | 日東工器株式会社 | Portable machining tool |
JPWO2021039186A1 (en) * | 2019-08-28 | 2021-03-04 | ||
GB2600572B (en) * | 2019-08-28 | 2023-03-29 | Nitto Kohki Co | Portable machine tool |
AU2020338309B2 (en) * | 2019-08-28 | 2024-02-08 | Nitto Kohki Co., Ltd. | Portable machining tool |
CN113600870A (en) * | 2021-09-06 | 2021-11-05 | 永康市晓诚电器有限公司 | Electric tool with protection device |
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