GB2075421A - A hand machine tool, especially a keyhole saw - Google Patents

A hand machine tool, especially a keyhole saw Download PDF

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Publication number
GB2075421A
GB2075421A GB8114002A GB8114002A GB2075421A GB 2075421 A GB2075421 A GB 2075421A GB 8114002 A GB8114002 A GB 8114002A GB 8114002 A GB8114002 A GB 8114002A GB 2075421 A GB2075421 A GB 2075421A
Authority
GB
United Kingdom
Prior art keywords
air guide
machine tool
pin
guide duct
control valve
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.)
Granted
Application number
GB8114002A
Other versions
GB2075421B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scintilla AG
Original Assignee
Scintilla AG
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 Scintilla AG filed Critical Scintilla AG
Publication of GB2075421A publication Critical patent/GB2075421A/en
Application granted granted Critical
Publication of GB2075421B publication Critical patent/GB2075421B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/02—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of beds; of guiding arrangements for work-tables or saw carriers; of frames
    • B23D51/025—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of beds; of guiding arrangements for work-tables or saw carriers; of frames of arrangements for guiding the saw blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042—Devices for removing chips
    • B23Q11/005—Devices for removing chips by blowing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

A control valve (15) is located in an air guide duct (12) directed towards the cutting location. Interchangeable, shaped parts (13) varying the direction of the air flow may be provided. In order to be able to repeat as desired practical combinations between the shaped parts (13) and the positions of the control valve (15), setting symbols (24 to 26) are associated with the various shaped parts (13) and the various rotary positions of the control valve (15) for optimal matching of the chip removing device to various materials to be worked on. <IMAGE>

Description

SPECIFICATION A hand machine tool, especially a keyhole saw State of the art The invention originates from a hand machine tool according to the preamble to claims 1 and 4.
A hand machine tool of this kind is already known from German OS 25 46 527. The air guide ducts provided in this machine serve either for extracting or blowing away chips existing at the cutting location. Thus, the action of the sucking or blowing devices which are used is not ideal since they cannot be matched to the materials of the workpieces to be operated on. For example, for operating on wood, an air flow with considerable sucking or blowing effect is of advantage. For operating on materials which require a lubricating and/or cooling medium, care must be taken that the sucking or blowing air flow does not remove the lubricating and/or cooling medium from the cutting location.
Advantages of the invention As opposed to this, the hand machine tool in accordance with the invention comprising the characterising features of claims 1 and/or 4 has the advantage that the sucking or blowing air flow can be matched optimally to the material to be operated on. By means of the control valve used in the air supply duct and/or the insertion of various shaped parts at the opening from the duct facing the cutting location, an optimal matching of the chip removal device to the different needs required by the material is made possible with simple means.
Advantageous further developments and improvements of the said hand machine tool are made possible by the measures set forth in the sub-claims. Forming the control valve as a pin passing transversely through the air guide duct is of special advantage. This control valve is of simple construction and easily operated. Preferred operating positions of the said control valve can be established in a simple manner by means of detents. In cooperation with the easily exchangeable shaped parts at the opening from the duct, it can be preferable to provide the various shaped parts with identical marks associated with the various control positions of the control valve.
Drawing An embodiment of the subject matter of the invention is illustrated in the drawing and is described in more detail in the following specification. Figure 1 is a view of a hand machine tool in accordance with the invention partially in section and Figure 2 is a side view of Figure 1 in the direction of the arrow A indicating a section line.
Description of the embodiment A motor (not shown) and a known gearbox for driving a saw blade holder 3, are accommodated in a machine housing 1 provided with air slots 2. A keyhole saw blade 4 is clamped in the saw blade holder 3. A base plate 5 is connected by an arcuate bridge 6 to the machine housing which, in its turn, is mounted by means of a screw 7. A holder 8 is also fixed in the machine housing 1 and carries a supporting roller 9 for the keyhole saw blade 4. Moreover, the supporting roller 9 is mounted on an axle 10 which is secured by pins 1 The machine housing 1 forms an air guide duct 12. Its opening on the cutting location side is formed partially by various exchangeable shaped parts 13 which are retained in a dovetail guide 14 in the machine housing 1.A pin 15 with a cut-out portion 16 passes transversely through the air guide duct 12. Moreover, this cut-out portion 16 is so dimensioned that a remaining web 17 on the pin 15 can open the air guide duct 12 in one extreme rotary position of the pin 15 (clearly shown in Figure 1) and can close the air guide duct 12 in another extreme rotary position. In the position of the web 17 indicated in dotted lines, the web only opens a small portion of the cross section of the air guide duct 1 2. The end of the pin 15 leading to the outside carries a handle 18. In an axially parallel bore 19, the said handle 18 accommodates a detent pin 20 and a detent spring 21. Detent recesses 22 corresponding to the hemispherical head on the detent pin 20 are arranged in the machine housing 1. A mark 23 can be set opposite different setting symbols 24 to 26.
Appropriate setting symbols can be applied to the various shaped parts 13. For example, the shaped part 13 inserted, for example, in Figure 1, carries the setting symbol 24. The combination in accordance with this setting symbol 24 between the shaped part 13 and the position of the pin 1 5 acting as a control valve is optimal for operating on wood. The pin 15 is accommodated in a bore 27 in the machine housing 1 and is secured therein by a snap ring 28. The cutting location of the keyhole saw blade 4 is referenced 29.
The device shown in the embodiment is designed as a blowing device. The air which is drawn in is conveyed partially through the air guide duct 12 to the cutting location 29.
1. A hand machine tool, especially a keyhole saw, comprising a motor driving a cutting tool (keyhole saw blade) and an air guide duct directed towards the cutting location, characterised in that, a control valve is inserted in the air duct.
2. A hand machine tool according to claim 1, characterised in that, the control valve is formed by a pin provided with a cut-out portion in the region of the air guide duct and passing transversely through the air guide duct, an end passing out of the machine housing and a handle located at the said end for rotating the pin.
3. A hand machine tool according to one of claims 1 and 2, characterised in that, a detent device is associated with the pin formed as a control valve.
4. A hand machine tool, especially a keyhole saw, comprising a motor driving a cutting tool (keyhole saw blade) and an air guide duct directed
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A hand machine tool, especially a keyhole saw State of the art The invention originates from a hand machine tool according to the preamble to claims 1 and 4. A hand machine tool of this kind is already known from German OS 25 46 527. The air guide ducts provided in this machine serve either for extracting or blowing away chips existing at the cutting location. Thus, the action of the sucking or blowing devices which are used is not ideal since they cannot be matched to the materials of the workpieces to be operated on. For example, for operating on wood, an air flow with considerable sucking or blowing effect is of advantage. For operating on materials which require a lubricating and/or cooling medium, care must be taken that the sucking or blowing air flow does not remove the lubricating and/or cooling medium from the cutting location. Advantages of the invention As opposed to this, the hand machine tool in accordance with the invention comprising the characterising features of claims 1 and/or 4 has the advantage that the sucking or blowing air flow can be matched optimally to the material to be operated on. By means of the control valve used in the air supply duct and/or the insertion of various shaped parts at the opening from the duct facing the cutting location, an optimal matching of the chip removal device to the different needs required by the material is made possible with simple means. Advantageous further developments and improvements of the said hand machine tool are made possible by the measures set forth in the sub-claims. Forming the control valve as a pin passing transversely through the air guide duct is of special advantage. This control valve is of simple construction and easily operated. Preferred operating positions of the said control valve can be established in a simple manner by means of detents. In cooperation with the easily exchangeable shaped parts at the opening from the duct, it can be preferable to provide the various shaped parts with identical marks associated with the various control positions of the control valve. Drawing An embodiment of the subject matter of the invention is illustrated in the drawing and is described in more detail in the following specification. Figure 1 is a view of a hand machine tool in accordance with the invention partially in section and Figure 2 is a side view of Figure 1 in the direction of the arrow A indicating a section line. Description of the embodiment A motor (not shown) and a known gearbox for driving a saw blade holder 3, are accommodated in a machine housing 1 provided with air slots 2. A keyhole saw blade 4 is clamped in the saw blade holder 3. A base plate 5 is connected by an arcuate bridge 6 to the machine housing which, in its turn, is mounted by means of a screw 7. A holder 8 is also fixed in the machine housing 1 and carries a supporting roller 9 for the keyhole saw blade 4. Moreover, the supporting roller 9 is mounted on an axle 10 which is secured by pins 1 The machine housing 1 forms an air guide duct 12. Its opening on the cutting location side is formed partially by various exchangeable shaped parts 13 which are retained in a dovetail guide 14 in the machine housing 1.A pin 15 with a cut-out portion 16 passes transversely through the air guide duct 12. Moreover, this cut-out portion 16 is so dimensioned that a remaining web 17 on the pin 15 can open the air guide duct 12 in one extreme rotary position of the pin 15 (clearly shown in Figure 1) and can close the air guide duct 12 in another extreme rotary position. In the position of the web 17 indicated in dotted lines, the web only opens a small portion of the cross section of the air guide duct 1 2. The end of the pin 15 leading to the outside carries a handle 18. In an axially parallel bore 19, the said handle 18 accommodates a detent pin 20 and a detent spring 21. Detent recesses 22 corresponding to the hemispherical head on the detent pin 20 are arranged in the machine housing 1. A mark 23 can be set opposite different setting symbols 24 to 26. Appropriate setting symbols can be applied to the various shaped parts 13. For example, the shaped part 13 inserted, for example, in Figure 1, carries the setting symbol 24. The combination in accordance with this setting symbol 24 between the shaped part 13 and the position of the pin 1 5 acting as a control valve is optimal for operating on wood. The pin 15 is accommodated in a bore 27 in the machine housing 1 and is secured therein by a snap ring 28. The cutting location of the keyhole saw blade 4 is referenced 29. The device shown in the embodiment is designed as a blowing device. The air which is drawn in is conveyed partially through the air guide duct 12 to the cutting location 29. CLAIMS
1. A hand machine tool, especially a keyhole saw, comprising a motor driving a cutting tool (keyhole saw blade) and an air guide duct directed towards the cutting location, characterised in that, a control valve is inserted in the air duct.
2. A hand machine tool according to claim 1, characterised in that, the control valve is formed by a pin provided with a cut-out portion in the region of the air guide duct and passing transversely through the air guide duct, an end passing out of the machine housing and a handle located at the said end for rotating the pin.
3. A hand machine tool according to one of claims 1 and 2, characterised in that, a detent device is associated with the pin formed as a control valve.
4. A hand machine tool, especially a keyhole saw, comprising a motor driving a cutting tool (keyhole saw blade) and an air guide duct directed towards the cutting location, characterised in that, at its end facing the cutting location, the air guide duct is formed at least partially by an easily exchangeable shaped part in order to vary the direction of blowing of the air flow blown through the air guide duct.
5. A hand machine tool according to claim 4, characterised in that, the easily exchangeable shaped part is retained in a dovetail guide.
6. A hand machine tool according to one of claims 1 to 5, characterised in that, the air guide duct leads from the machine blower to the blowing location in the vicinity of the cutting location and thus conveys the blowing air from the machine blower.
7. A hand machine tool substantially as herein described with reference to the accompanying drawings.
GB8114002A 1980-05-09 1981-05-07 A hand machine tool especiallya keyhole saw Expired GB2075421B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8012652U DE8012652U1 (en) 1980-05-09 1980-05-09 Hand machine tool, in particular a jigsaw

Publications (2)

Publication Number Publication Date
GB2075421A true GB2075421A (en) 1981-11-18
GB2075421B GB2075421B (en) 1984-12-12

Family

ID=6715380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8114002A Expired GB2075421B (en) 1980-05-09 1981-05-07 A hand machine tool especiallya keyhole saw

Country Status (6)

Country Link
JP (1) JPS6114405Y2 (en)
CH (1) CH652640A5 (en)
DE (1) DE8012652U1 (en)
ES (1) ES502030A0 (en)
GB (1) GB2075421B (en)
NL (1) NL186949B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221652A1 (en) * 1985-09-27 1987-05-13 Black & Decker Inc. Improvements in or relating to power tools
WO1988007906A1 (en) * 1987-04-10 1988-10-20 Robert Bosch Gmbh Compass saw
US5303478A (en) * 1992-03-16 1994-04-19 Gugel Leslie H 220 volt a.c. cord-operated, hand-held portable hack-saw
US5644847A (en) * 1995-04-07 1997-07-08 Scintilla Ag Compass saw
GB2339720A (en) * 1998-07-16 2000-02-09 Bosch Gmbh Robert Hand-held planing machine
GB2399537A (en) * 2003-03-13 2004-09-22 Black & Decker Inc Method and apparatus for removing dust from a workpiece
US8033026B2 (en) 2007-09-21 2011-10-11 Black & Decker Inc. Adjustable and removable keel assembly and blade guide for a jigsaw
US8578615B2 (en) 2011-09-12 2013-11-12 Black & Decker Inc. Jigsaw with deployable keel and tiltable shoe
US20140325853A1 (en) * 2013-05-06 2014-11-06 Robert Bosch Tool Corporation Line-Of-Sight Blower For A Power Tool
US9827623B2 (en) 2007-09-21 2017-11-28 Black & Decker Inc. Control of reciprocation speed and orbital magnitude of a jigsaw with a plurality of material and/or task descriptive icons
US9844823B2 (en) 2007-09-21 2017-12-19 Black & Decker Inc. Jigsaw with cutting angle indicator in jigsaw housing assembly
US9899899B2 (en) 2013-10-25 2018-02-20 Black & Decker Inc. Handheld power tool with compact AC switch
US10029322B2 (en) 2007-09-21 2018-07-24 Black & Decker Inc. Housing of a cutting tool including blade storage, integral blade guard and motor ventilation pathway

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3542263A1 (en) * 1985-11-29 1987-06-04 Festo Kg Portable planer
DE3717585A1 (en) * 1987-05-25 1988-12-08 Licentia Gmbh Jigsaw driven by means of electric motor
ITBO20020289A1 (en) * 2002-05-14 2003-11-14 Scm Group Spa DOOR HEAD - TOOL FOR WOODWORKING MACHINES
DE10338602B3 (en) * 2003-08-22 2004-08-19 Hilti Ag Motor-driven sawing tool e.g. fretsaw, with fan-assisted air cooling of electric drive motor and discharge of air onto and in front of sawing zone for protecting user from sawdust
JP5785026B2 (en) * 2011-08-09 2015-09-24 東洋ゴム工業株式会社 Polishing pad groove processing machine and polishing pad groove processing method
DE102013226082A1 (en) * 2013-12-16 2015-06-18 Robert Bosch Gmbh Hand machine tool basic disk device

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GB253445A (en) * 1925-12-23 1926-06-17 Frank Hinman Pierpont Improvements in or relating to apparatus for removing punchings or particles from paper perforating machines
GB388023A (en) * 1930-10-24 1933-02-14 Electrical Res Prod Inc Improvements in sound and like recording apparatus
US2372699A (en) * 1941-07-18 1945-04-03 Delta Mfg Co Cutting machine
NL112212C (en) * 1942-06-12
US2369925A (en) * 1944-02-24 1945-02-20 Samuel B Smith Surgical instrument for bone cutting
GB659024A (en) * 1949-08-06 1951-10-17 Armstrong Whitworth Co Eng Improved counter-sink tool
US2822005A (en) * 1956-11-15 1958-02-04 Black & Decker Mfg Co Jig saw attachment
FR1190813A (en) * 1958-01-27 1959-10-15 Promeca Improvements to tools for working with plastics, in particular laminate products
DE2546527C2 (en) * 1975-10-17 1993-05-27 Robert Bosch Gmbh, 7000 Stuttgart Jigsaw
US4088164A (en) * 1977-06-02 1978-05-09 Vermont American Corporation Portable router attachment
US4195403A (en) * 1979-05-09 1980-04-01 Gruber Clarence R Sawdust removal device

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221652A1 (en) * 1985-09-27 1987-05-13 Black & Decker Inc. Improvements in or relating to power tools
WO1988007906A1 (en) * 1987-04-10 1988-10-20 Robert Bosch Gmbh Compass saw
JP2839519B2 (en) 1987-04-10 1998-12-16 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Milling saw
US5303478A (en) * 1992-03-16 1994-04-19 Gugel Leslie H 220 volt a.c. cord-operated, hand-held portable hack-saw
US5644847A (en) * 1995-04-07 1997-07-08 Scintilla Ag Compass saw
GB2339720A (en) * 1998-07-16 2000-02-09 Bosch Gmbh Robert Hand-held planing machine
GB2339720B (en) * 1998-07-16 2000-11-22 Bosch Gmbh Robert Hand-held planing machine
GB2399537A (en) * 2003-03-13 2004-09-22 Black & Decker Inc Method and apparatus for removing dust from a workpiece
US8033026B2 (en) 2007-09-21 2011-10-11 Black & Decker Inc. Adjustable and removable keel assembly and blade guide for a jigsaw
US9827623B2 (en) 2007-09-21 2017-11-28 Black & Decker Inc. Control of reciprocation speed and orbital magnitude of a jigsaw with a plurality of material and/or task descriptive icons
US9844823B2 (en) 2007-09-21 2017-12-19 Black & Decker Inc. Jigsaw with cutting angle indicator in jigsaw housing assembly
US9981327B2 (en) 2007-09-21 2018-05-29 Black & Decker Inc. Cutting angle indicator in jigsaw housing with dust extraction
US10029322B2 (en) 2007-09-21 2018-07-24 Black & Decker Inc. Housing of a cutting tool including blade storage, integral blade guard and motor ventilation pathway
US8578615B2 (en) 2011-09-12 2013-11-12 Black & Decker Inc. Jigsaw with deployable keel and tiltable shoe
US20140325853A1 (en) * 2013-05-06 2014-11-06 Robert Bosch Tool Corporation Line-Of-Sight Blower For A Power Tool
US9931704B2 (en) * 2013-05-06 2018-04-03 Nanjing Chevron Industry Co., Ltd. Line-of-sight blower for a power tool
US9899899B2 (en) 2013-10-25 2018-02-20 Black & Decker Inc. Handheld power tool with compact AC switch

Also Published As

Publication number Publication date
ES8301728A1 (en) 1983-01-01
JPS56176802U (en) 1981-12-26
ES502030A0 (en) 1983-01-01
GB2075421B (en) 1984-12-12
JPS6114405Y2 (en) 1986-05-06
NL186949B (en) 1990-11-16
NL8102222A (en) 1981-12-01
DE8012652U1 (en) 1982-01-28
CH652640A5 (en) 1985-11-29

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PE20 Patent expired after termination of 20 years

Effective date: 20010506