EP2233237A2 - Gehrungskreissäge mit oberem Tisch - Google Patents

Gehrungskreissäge mit oberem Tisch Download PDF

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Publication number
EP2233237A2
EP2233237A2 EP10157334A EP10157334A EP2233237A2 EP 2233237 A2 EP2233237 A2 EP 2233237A2 EP 10157334 A EP10157334 A EP 10157334A EP 10157334 A EP10157334 A EP 10157334A EP 2233237 A2 EP2233237 A2 EP 2233237A2
Authority
EP
European Patent Office
Prior art keywords
chips
mitre
main body
circular saw
base
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.)
Withdrawn
Application number
EP10157334A
Other languages
English (en)
French (fr)
Other versions
EP2233237A3 (de
Inventor
Masahiko Inai
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.)
Makita Corp
Original Assignee
Makita Corp
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 Corp filed Critical Makita Corp
Publication of EP2233237A2 publication Critical patent/EP2233237A2/de
Publication of EP2233237A3 publication Critical patent/EP2233237A3/de
Withdrawn legal-status Critical Current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
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G3/00—Arrangements for removing bark-zones, chips, waste, or dust, specially designed for use in connection with wood-working machine or in wood-working plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/16—Saw benches
    • B27B5/165—Convertible sawing devices

Definitions

  • This invention relates to a mitre circular saw with an upper table, which can be used both as a mitre circular saw machine for cutting a workpiece placed on a base by lowering a main body having a saw blade and as a table saw with the use of a table provided at an upper part of the main body.
  • Japanese Laid-open Patent Publication No. 2005-169742 discloses a mitre circular saw with an upper table, in which a mitre circular saw mode and a table saw mode can be selectively used.
  • a mitre circular saw mode a workpiece placed on a table such as a base is cut using a lower edge portion of a circular saw blade that is driven to rotate, and in the table saw mode, a workpiece placed on the upper table that is arranged above the table is cut using an upper edge portion of the circular saw blade.
  • This conventional mitre circular saw has a discharge nozzle for chips at a front side of a lower surface of the upper table, and chips generated in the table saw mode are discharged toward the front side of the upper table through the discharge nozzle.
  • a dust collector may be connected to the discharge nozzle through a suction hose, so that chips can be collected by the dust collector through the suction hose.
  • the suction hose may become an obstacle for the user standing in front of the upper table during cutting of the workpiece. This disadvantageously leads to a difficulty in a smooth cutting operation for the workpiece, and thus results in a hard-to-operate mitre circular saw.
  • a mitre circular saw with an upper table comprises: a base on which a workpiece is placed; a main body disposed above the base and configured to be movable upward and downward with respect to the base; a saw blade provided on the main body and configured to be driven to rotate; a safety cover provided on the main body and configured to be rotatably moved by an upward and downward movements of the main body, between a covering position at which the safety cover is positioned at a lower side of the main body to shield the saw blade and an open position at which the safety cover is positioned at a front side of the main body to expose a lower edge of the saw blade; a blade edge plate provided on an upper surface of the base and having a slit where the saw blade is permitted to enter when the main body is lowered; and an upper table disposed above the main body and configured such that an upper edge of the saw blade penetrates the upper table at a predetermined lowered position of the main body and a workpiece is
  • suction hose for collecting chips at the front face side of the upper table. Therefore, the suction hose does not become an obstacle for the user during the cutting operation of a workpiece, leading to improved operability of the mitre circular saw.
  • the mitre circular saw according to the first embodiment may be characterized in that a width dimension of the inlet for chips is not smaller than that of the slit.
  • the mitre circular saw according to the first embodiment or the second embodiment may be characterized in that a discharge passage for chips is formed in the base, by which chips generated by cutting the workpiece on the base are guided toward a rear side of the base, and that the inlet for chips is in communication with the discharge passage for chips.
  • the mitre circular saw according to any one of the first to third embodiments may be characterized in that the blade edge plate comprises a right blade edge plate and a left blade edge plate which are slidable in a right-left direction relative to the base, and that the slit is formed between the right blade edge plate and the left blade edge plate when one of or both of the right and left blade edge plates are slid in the right-left direction.
  • the mitre circular saw according to the fourth embodiment may be characterized in that a partition member for partitioning the slit and the inlet for chips is fixed to one of the right and left blade edge plates, the partition member being configured to bridge across the slit and reach to the other one of the left and right blade edge plates.
  • the partition member is fixed to one of the right and left blade edge plates, and the partition member bridges across the slit at the front end of the slit. Therefore, even in the case where the width dimension of the slit is adjusted by sliding the right and left blade edge plates in the right-left direction relative to the base, the partition member is slidable in the right-left direction while remaining a bridged state at the front end of the slit. This makes it possible to always define the inlet for chips at a front side of the slit separately from the slit.
  • the inlet for chips can be defined even after the width dimension of the slit is adjusted, it is not necessary to perform processing on the base for the purpose of defining the inlet for chips in accordance with the adjusted width dimension of the slit.
  • the mitre circular saw according to any one of the first to fifth embodiments may be characterized in that a front end of the inlet for chips substantially aligns perpendicularly with or is positioned forwardly of a front end of a lower end opening of the safety cover that is positioned in a proximity of the upper surface of the base at its open position.
  • the front end of the inlet for chips is set to substantially aligns perpendicularly with or to be positioned forwardly of the front end of the lower end opening of the safety cover that is positioned in the proximity of the upper surface of the base, the inlet for chips can be arranged in a position to which chips flowing inside the safety cover are guided.
  • a mitre circular saw with an upper table 1 as shown in the figures comprises a base 10, a main body support portion 20, and a circular saw main body 30.
  • the base 10 comprises a turntable 11 and a fence 12.
  • a workpiece such as wood is placed on an upper surface of the turntable 11.
  • a handle 11A is provided at a front side of the turntable 11. When a user holds and operates the handle 11A, the turntable 11 moves horizontally and comes to rest at predetermined horizontal rotation angles.
  • the fence 12 is positioned at an upper part of the base 10. The fence 12, against which wood (workpiece) is brought into abutment, is used for positioning the wood.
  • a left blade edge plate 14A and a right blade edge plate 14B are mounted on an upper surface of the turntable 11 while being spaced apart from each other.
  • a slit 15 is formed between the left blade edge plate 14A and the right blade edge plate 14B.
  • a long hole 16A, 16B is formed in each of the blade edge plates 14A, 14B.
  • a screw is loosely fitted into the long hole 16A, 16B and then threadedly engaged with a corresponding screw hole formed in the turntable 11. Thereby, the left blade edge plate 14A and the right blade edge plate 14B are fixed to turntable 11.
  • left blade edge plate 14A and the right blade edge plate 14B are slid along the longitudinal direction (right-left direction) of the long holes 16A, 16B relative to the turntable 11, positions to which the left and right blade edge plates 14A, 14B are fixed can be adjusted.
  • the width dimension W1 of the slit 15 can be adjusted by changing the positions to which the blade edge plates 14A, 14B are fixed on the turntable 11. As will be described later, a lower edge portion of the saw blade 34 enters the slit 15.
  • a partition member 17 is provided at a front end of the slit 15.
  • the partition member 17 is fixed to a reverse surface of the left blade edge plate 14A, and bridges between the left blade edge plate 14A and the right blade edge plate 14B. Therefore, even if the width dimension W1 of the slit 15 is changed by sliding the respective blade edge plates 14A, 14B along the longitudinal direction of the long holes 16A, 16B, the partition member 17 moves in the same direction as the left blade edge plate 14A and the right blade edge plate 14B slide while remaining a bridged state across the slit 15.
  • An inlet for chips 18 is defined in a space surrounded by the partition member 17, the left and right blade edge plates 14A, 14B, and the front edge of the upper surface of the turntable 11. As will be described later, chips generated by cutting wood that is placed on the upper table 36 fall into the inlet for chips 18. Because of the partition member 17 at the front end of the slit 15, the slit 15 and the inlet for chips 18 positioned forwardly of the slit 15 can be partitioned. According to this embodiment, the width dimension W2 of the inlet for chips 18 is greater than the width dimension W1 of the slit 15.
  • a discharge passage for chips R is formed inside the turntable 11.
  • An inlet of the discharge passage for chips R opens toward the upper surface of the turntable 11 through the slit 15, and an outlet of the discharge passage R opens toward the rear side of the base 10 through a discharge tube 19.
  • the discharge passage for chips R extends from the slit 15 downwardly along an outer periphery of the saw blade 34 and then obliquely upwardly to the discharge tube 19 at the rear side of the base 10.
  • the discharge tube 19 is connected to a dust bag or through a suction hose to a dust collector. Chips generated by cutting wood that is placed on the upper surface of the turntable 11 flow into the discharge passage for chips R from the slit 15. The chips are guided along the discharge passage R toward the discharge tube 19.
  • the discharge passage for chips R is in communication with the inlet for chips 18 within the turntable 11.
  • a main body support portion 20 comprises a support member 21 and an upward-downward movement supporting pin 22.
  • One end of the support member 21 is pivotally supported on the turntable 11 by a tilt pin 23 ( see FIG. 5 ).
  • the support member 21 is tiltable by means of the tilt pin 23 and extends above the turntable 11.
  • Provided in the proximity of the tilt pin 23 is a lock lever 24.
  • the support member 21 can be held stationary by the lock lever 24 while being tilted by a predetermined angle.
  • a circular saw main body 30 to be described later is mounted to the other end of the support member 21 through the upward-downward movement supporting pin 22 in a manner pivotable in the upward-downward direction, and the circular saw main body 30 is urged by a compression spring (not shown) to an upper dead point as shown in FIG. 1 .
  • the circular saw main body 30 includes safety covers 31A, 31B, a blade cover 32, an electric motor 33, a saw blade 34, a handle 35, an upper table 36, and an upper cover 37.
  • Reference characters 39 and 38 in the drawings indicate an actuation switch for the electric motor 33 and a stop switch for the electric motor 33, respectively.
  • the blade cover 32 shields a side portion of the saw blade 34
  • the safety cover 31A is positioned under the circular saw main body 30 to shield a lower edge portion of the saw blade 34
  • the safety cover 31B shields a side portion of the saw blade 34.
  • the circular saw main body 30 is an example of a main body according to the present invention and the illustrated position before the circular saw main body 30 is lowered indicates an example of a covering position according to the present invention.
  • the safety covers 31A, 31B are rotated upward with a rotary support pin 31C as a rotation center. Therefore, as seen in FIGS. 2 , 3 and 5 , the safety covers 31A, 31B are positioned at the front side of the circular saw main body 30 and are all substantially superposed one another, and the lower edge portion of the saw blade 34 is exposed from the safety covers 31A, 31B. In this position, as best seen in FIGS. 2 and 5 , the lower edge portion of the saw blade 34 enters the slit 15.
  • the position as shown in FIGS. 2 , 3 and 5 indicates an example of an open position according to the present invention.
  • the lower end opening of the safety cover 31A is positioned in the close vicinity of the upper surface of the turntable 11.
  • the perpendicular line passing through the front end 18A of the inlet for chips 18 is substantially aligned with the perpendicular line passing through the front end 31D of the lower end opening of the safety cover 31A.
  • the upper table 36 is disposed above the circular saw main body 30. As seen in FIGS. 2 and 5 , a slit 36B is formed in the upper table 36, penetrating the upper table 36.
  • the circular saw main body 30 is lowered to the position such as shown in FIGS. 2 and 3 , the upper end portion of the saw blade 34 protrudes from the upper surface 36A of the upper table 36 through the slit 36B ( see FIG. 5 ).
  • the position in which the circular saw main body 30 has been lowered as seen in FIGS. 2 and 3 indicates a predetermined lowered position according to the present invention.
  • the circular saw main body 30 can be held stationary in the lowered position (where the circular saw main body 30 has been lowered) by a locking mechanism (not shown).
  • FIG. 5 illustrates a state in which the upper cover 37 is brought into contact with the upper surface 36A.
  • the support member 37B penetrates the upper surface 36A and is fixed to the circular saw main body 30 by bolts 37C.
  • wood is placed on the upper surface 36A and cut by the upper edge portion of the saw blade 34.
  • the mitre circular saw with the upper table 1 has a mitre circular saw mode and a table saw mode, which can be used in a selective manner.
  • the actuation switch 39 is turned on and the circular saw main body 30 is lowered by the user, so that the wood placed on the upper surface of the turntable 11 can be cut by the lower edge portion of the saw blade 34 that is driven to rotate by the electric motor 33 in a direction indicated by the solid arrow of FIGS. 3 and 5 .
  • Chips discharged by cutting the wood are collected by means of the dust bag or the dust collector, passing through the discharge tube 19 (or passing through the discharge passage for chips R and the discharge tube 19, in the case where the circular saw main body 30 is positioned in the vicinity of the lowered position).
  • chips generated by cutting wood that is placed on the upper surface 36A of the upper table 36 are collected by the following manner.
  • the user places wood on the upper surface 36A while the circular saw main body 30 is fixed to the lowered position as described above, and then the user holds and slides the wood along the upper surface 36A from the front side of the upper surface 36A toward the upper cover 37 positioned at the rear side of the upper surface 36A.
  • the wood When the wood is slid on the upper cover 37 in this direction, the wood causes the upper cover 37 to be lifted up with the rotary support pin 37A as a rotation center. Thereby, the upper edge portion of the saw blade 34 is exposed from the upper cover 37.
  • the wood slid on the upper surface 36A is cut by the upper edge portion of the saw blade 34 that is driven to rotate by the electric motor 33.
  • Chips generated by cutting the wood using the upper edge portion of the saw blade 34 flow into the slit 36B that is formed in the upper table 36 in a penetrating manner, and pass through the inside of the blade cover 32 and the safety covers 31A, 31B in a direction indicated by the two-dot chain line of FIG. 5 , and thereafter the wood chips are scattered downward from the safety cover 31A.
  • the front end 31D of the lower end opening is set to substantially overlap with the front end 18A of the inlet for chips 18, the wood chips scattered downward from the safety cover 31A are guided to the inlet for chips 18.
  • the width dimension W2 of the inlet for chips 18 is greater than the width dimension W1 of the slit 15, the opening width of the inlet for chips 18 becomes greater at the upper surface of the turntable 11 than the opening width of the slit 15.
  • the lower end opening of the safety cover 31A is positioned in the vicinity of the upper surface of the turntable 11. In this position, wood chips are guided downwardly of the safety cover 31A and then flow into the inlet for chips 18. Therefore, the wood chips can be collectively guided to the inlet for chips 18. Accordingly, it is possible to prevent wood chips from being guided forwardly of the mitre circular saw 1 and scattered toward the user, so that the user does not feel any discomfort.
  • suction hose for collecting wood chips at the front side of the upper table 36. Therefore, the suction hose does not become an obstacle for the user during the cutting operation of wood, leading to improved operability of the mitre circular saw with the upper table 1.
  • the opening width of the inlet for chips 18 is greater at the upper surface of the turntable 11 than the opening width of the slit 15. Therefore, in the table saw mode, wood chips are more likely to flow into the inlet for chips 18 than into the slit 15.
  • the inlet for chips 18 is in communication with the discharge passage for chips R within the turntable 11, wood chips flowing into the inlet for chips 18 can pass through the discharge passage for chips R. Therefore, it is not necessary to provide a passage for discharging wood chips, other than the discharge passage for chips R.
  • the partition member 17 is fixed to the reverse surface of the left blade edge plate 14A while bridging the slit 15 at the front end of the slit 15. Therefore, even in the case where the width dimension W1 of the slit 15 is adjusted by sliding each of the right and left blade edge plates 14A, 14B in the longitudinal direction of the long holes 16A, 16B relative to the turntable 11, the partition member 17 is slidable in the same direction as the right and left blade edge plates 14A, 14B slide along while bridging across the slit 15. This makes it possible to always define the inlet for chips 18 at the front side of the slit 15 separately from the slit 15.
  • the inlet for chips 18 can be formed even after the width dimension W1 of the slit 15 is changed for adjustment, it is not necessary to perform processing on the turntable 11 or the base 10 for the purpose of defining the inlet for chips 18 in accordance with the adjusted width dimension W1 of the slit 15.
  • the inlet for chips 18 can be formed in accordance with the width dimension W1 of the slit 15 without substantial increase of the cost.
  • the inlet for chips 18 can be arranged in a position to which wood chips scattered downward from the safety cover 31A are guided.
  • the partition member 17 is fixed to the reverse surface of the left blade edge plate 14A so as to bridge between the left blade edge plate 14A and the right blade edge plate 14B.
  • the partition member 17 may be fixed to the reverse surface of the right blade edge plate 14B.
  • the front end 18A of the inlet for chips 18 is set to be substantially aligns perpendicularly with the front end 31D of the lower end opening of the safety cover 31A.
  • the front end 18A may be positioned forwardly of the front end 31D, when looking down the mitre circular saw with the upper table 1 from above. Therefore, as with the above preferred embodiment, the inlet for chips 18 can be arranged in a position to which wood chips scattered downward from the safety cover 31A are guided.
  • the safety cover is divided into two parts.
  • the safety covers 31A, 31B may be formed as an integral cover.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP10157334A 2009-03-25 2010-03-23 Gehrungskreissäge mit oberem Tisch Withdrawn EP2233237A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009074751A JP2010221389A (ja) 2009-03-25 2009-03-25 上部テーブル付卓上丸鋸

Publications (2)

Publication Number Publication Date
EP2233237A2 true EP2233237A2 (de) 2010-09-29
EP2233237A3 EP2233237A3 (de) 2011-11-02

Family

ID=42288723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10157334A Withdrawn EP2233237A3 (de) 2009-03-25 2010-03-23 Gehrungskreissäge mit oberem Tisch

Country Status (3)

Country Link
EP (1) EP2233237A3 (de)
JP (1) JP2010221389A (de)
CN (1) CN101844249B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2436469A1 (de) * 2010-10-04 2012-04-04 Makita Corporation Gehrungssäge
CN103963170A (zh) * 2013-02-02 2014-08-06 南京搏峰电动工具有限公司 台锯
CN103963169A (zh) * 2013-02-02 2014-08-06 南京搏峰电动工具有限公司 台锯
CN103962884A (zh) * 2014-04-16 2014-08-06 于法周 一种锯床保护装置
DE102010028127B4 (de) 2009-04-28 2019-05-29 Robert Bosch Tool Corp. Sicherheitssystem einer kombinierten Tisch- und Gehrungssäge
US10792834B2 (en) 2017-06-05 2020-10-06 Milwaukee Electric Tool Corporation Table saw

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699422B (zh) * 2012-06-01 2014-07-09 徐晓雨 多功能锯
TWI552845B (zh) * 2014-01-29 2016-10-11 力山工業股份有限公司 鋸切機工作台的延伸裝置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005169742A (ja) 2003-12-09 2005-06-30 Makita Corp 上部テーブル付卓上丸鋸

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005178281A (ja) * 2003-12-22 2005-07-07 Makita Corp 上部テーブル付卓上丸鋸
DE202004019137U1 (de) * 2004-12-09 2005-05-04 Metabowerke Gmbh Kapp- und Tischkreissäge
CN2764539Y (zh) * 2005-01-10 2006-03-15 威海嘉良进出口有限公司 多用锯切机
CN2822844Y (zh) * 2005-08-09 2006-10-04 力山工业股份有限公司 集尘罩可配合锯片升降的圆锯机
AU2007200238B9 (en) * 2006-01-31 2012-06-14 Black & Decker Inc Saw

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005169742A (ja) 2003-12-09 2005-06-30 Makita Corp 上部テーブル付卓上丸鋸

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010028127B4 (de) 2009-04-28 2019-05-29 Robert Bosch Tool Corp. Sicherheitssystem einer kombinierten Tisch- und Gehrungssäge
EP2436469A1 (de) * 2010-10-04 2012-04-04 Makita Corporation Gehrungssäge
CN103963170A (zh) * 2013-02-02 2014-08-06 南京搏峰电动工具有限公司 台锯
CN103963169A (zh) * 2013-02-02 2014-08-06 南京搏峰电动工具有限公司 台锯
CN103963170B (zh) * 2013-02-02 2015-11-25 南京搏峰电动工具有限公司 台锯
CN103963169B (zh) * 2013-02-02 2016-04-20 南京搏峰电动工具有限公司 台锯
CN103962884A (zh) * 2014-04-16 2014-08-06 于法周 一种锯床保护装置
US10792834B2 (en) 2017-06-05 2020-10-06 Milwaukee Electric Tool Corporation Table saw
US11407142B2 (en) 2017-06-05 2022-08-09 Milwaukee Electric Tool Corporation Table saw

Also Published As

Publication number Publication date
JP2010221389A (ja) 2010-10-07
CN101844249A (zh) 2010-09-29
EP2233237A3 (de) 2011-11-02
CN101844249B (zh) 2012-07-04

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