EP0949048A2 - Scie à onglet à butée angulairement ajustable - Google Patents

Scie à onglet à butée angulairement ajustable Download PDF

Info

Publication number
EP0949048A2
EP0949048A2 EP99302803A EP99302803A EP0949048A2 EP 0949048 A2 EP0949048 A2 EP 0949048A2 EP 99302803 A EP99302803 A EP 99302803A EP 99302803 A EP99302803 A EP 99302803A EP 0949048 A2 EP0949048 A2 EP 0949048A2
Authority
EP
European Patent Office
Prior art keywords
base
saw
plane
assembly
supporting surface
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
EP99302803A
Other languages
German (de)
English (en)
Other versions
EP0949048B1 (fr
EP0949048A3 (fr
Inventor
Scott D. Evans
Daryl Meredith
Adan Ayala
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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 Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0949048A2 publication Critical patent/EP0949048A2/fr
Publication of EP0949048A3 publication Critical patent/EP0949048A3/fr
Application granted granted Critical
Publication of EP0949048B1 publication Critical patent/EP0949048B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B27B27/00—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon
    • B27B27/08—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon arranged adjustably, not limited to only one of the groups B27B27/02 - B27B27/06

Definitions

  • This invention relates generally to miter saws and, more particularly, to a fence for a miter saw.
  • Prior art miter saws typically have a base assembly 12, including a rotatable table assembly 13, a saw assembly 14, including a blade 14B, pivotally disposed on the table assembly 13 so that a user can downwardly pivot the saw assembly 13 to bring the blade 14B towards the table assembly 13, as shown in FIG. 1.
  • the table assembly 13 is rotatable about a vertical axis to allow miter cuts.
  • a bevel mechanism 35 to allow the saw assembly 14 to pivot about a horizontal axis for changing the angle of blade 14B relative to table assembly 13, i.e., the bevel angle. Accordingly, the crown molding M shown in FIG. 1 can be cut by rotating table assembly 13 for selecting the miter angle, rotating saw assembly 14 for selecting the bevel angle, and then downwardly pivoting the saw assembly 14 in a "chopping" action for cutting a molding M, disposed on table assembly 13.
  • the bevel mechanism 35 is expensive to design and manufacture. It could increase the inaccuracy of the saw 100, creating inaccurate cuts, which result in loss of materials, time and/or money.
  • Having a bevel mechanism 35 may require a different fence.
  • Fences are fixedly disposed on base assembly 12 to support a workpiece during the cutting operation.
  • the fence In miter saws without a bevel mechanism, the fence is typically a rectangle.
  • miter saws having a bevel mechanism i.e., a compound miter saw, the fence may have a large gap near the blade to provide clearance at any bevel angle. However, because of the large gap, such fence may not properly support the workpiece at the different bevel angles, causing inaccurate or rough cuts.
  • FIG. 2 Another prior art method for cutting crown molding is illustrated in FIG. 2, where like numerals designate like parts. Molding M is placed at an angle between fence 20 and table assembly 13. A stop 25 may be used to maintain the molding M in place. By changing the miter angle, the molding M can be cut along a compound angle without requiring bevel angle adjustments. However, because the bottom of molding M is substantially unsupported by the fence 20, it may splinter, creating an inaccurate cut, which may result in loss of materials, time and/or money.
  • an improved saw is employed.
  • the saw includes a base, a table rotatably attached to the base, a saw assembly attached to the table, and a first fence assembly attached to the base, the first fence assembly including a work supporting surface which is movable between a first position substantially perpendicular from at least one of the table plane and the base plane, and a second position inclined relative to from the at least one of the table plane and the base plane.
  • Another saw includes a base, a table rotatably attached to the base, a saw assembly attached to the table, and a first fence assembly attached to the base, the first fence assembly including a first workpiece supporting surface substantially perpendicular from at least one of the table plane and the base plane, and a second workpiece supporting surface which is inclined relative to from the at least one of the table plane and the base plane.
  • FIGS. 3 through 17B illustrate exemplary miter saws having a fence assembly according to the present invention, shown merely for purposes of illustration.
  • FIGS. 3 through 17B illustrate exemplary miter saws having a fence assembly according to the present invention, shown merely for purposes of illustration.
  • One skilled in the art will readily recognize from the following description, taken in conjunction with the accompanying drawings and claims, that the principles of the invention are equally applicable to other miter saws or saws of types other than that shown for purposes of illustration in the drawings.
  • the principles of a fence according to the invention are also applicable to other type of powered, or even unpowered, equipment for performing an operation on a workpiece.
  • Such equipment includes compound miter saws, dado saws, spindle shapers or sanders, or other types of powered or unpowered devices that allow placement of a workpiece in inclined positions.
  • miter saw 10 has a base assembly 12, including a rotatable table assembly 13, a saw assembly 14, including a blade 14B, pivotally disposed on the table assembly 13 so that a user can downwardly pivot the saw assembly 13 to bring the blade 14B towards the table assembly 13.
  • the table assembly 13 is rotatable about a vertical axis to allow miter cuts.
  • Saw blade 14B is at least partially enclosed by a blade guard 16 and driven by a motor 17 and a handle 18, which allows the operator to move the saw blade 14B and the blade guard 16 from a clear position free of a workpiece M to a cutting position with the saw blade 14B in cutting engagement with the workpiece.
  • fence assembly 200 a first embodiment of the fence according to the present invention is illustrated as fence assembly 200.
  • fence assembly 200 is interconnected with the base 12 and extends laterally across the table assembly 13 against which the workpiece M is fixedly positioned and supported for performing a cutting operation thereon.
  • fence assembly 200 is disposed on both left and right sides of saw 10.
  • Fence assembly 200 preferably comprises a workpiece supporting portion 204 that is slidably attached to post 205 via a boss 204B.
  • post 205 has a slot 207 therein for limiting the travel range of portion 204.
  • Boss 204B may extend through the slot 207 and treadingly engage knob 208.
  • Portion 204 preferably comprises a downward extension 206, which extends below the top surface of base 12 through a slot 201.
  • Extension 206 has a shaft 209 extending therethrough, which in turn extends through a slot 202 in base 12.
  • the portion 204 can be set so that it is substantially vertical. However, the angle of portion 204 relative to base 12 and table assembly 13 can be changed by sliding boss 204B along slot 207 and shaft 209 along slot 202, as shown in FIG. 5B. (Preferably, shaft 209 is connected via connector 209C to the corresponding shaft 209 in the opposite fence assembly 200 so that both fence assemblies 200 will move in conjunction.) The user can then lock the portion 204 in the desired position by tightening knob 208. To obtain a compound angle cut, the user need only to incline the portion 204, as shown in FIG. 5B, and change the miter angle.
  • fence assembly 210 is interconnected with the base 12 and extends laterally across the table assembly 13 against which the workpiece M is fixedly positioned and supported for performing a cutting operation thereon.
  • fence assembly 210 is disposed on both left and right sides of saw 10.
  • Fence assembly 210 preferably comprises a workpiece supporting portion 214 and a sliding portion 216 attached to portion 214.
  • Sliding portion 216 is slidably received on track 217 formed in base 12, allowing for pivotal movement of the portion 214 about a substantially horizontal axis, preferably coplanar with the top surface of table assembly 13.
  • sliding portion 216 has a slot 213, receiving therethrough a boss (not shown) attached to the base 12. The boss is threadingly engaged to knob 218.
  • the portion 214 can be set so that it is substantially vertical. However, the angle of portion 214 relative to base 12 and table assembly 13 can be changed by sliding portion 216 along track 217, as shown in FIG. 8B. The user can then lock the portion 214 in the desired position by tightening knob 218. To obtain a compound angle cut, the user need only to incline the portion 214, as shown in FIG. 8B, and change the miter angle.
  • portion 216 may be moved along track 217.
  • a rack on portion 216 and a meshing pinion on base 12 may be moved by rotating the pinion.
  • fence assembly 220 is interconnected with the base 12 and extends laterally across the table assembly 13 against which the workpiece M is fixedly positioned and supported for performing a cutting operation thereon.
  • fence assembly 220 is disposed on both left and right sides of saw 10.
  • Fence assembly 220 preferably comprises a workpiece supporting portion 224 pivotally attached to base 12 via a hinge 226.
  • portion 224 pivots about an axis substantially coplanar with the top surface of table 13.
  • Portion 224 includes an extension 225.
  • An arcuate slot 223 is disposed on base 12.
  • a knob 228 threadingly engages a bolt 229 extending through extension 225 and slot 223.
  • the portion 224 can be set so that it is substantially vertical. However, the angle of portion 224 relative to base 12 and table assembly 13 can be changed by rotating portion 224 forwardly or rearwardly about hinge 226, as shown in FIGS. 11B and 11C. The user can then lock the portion 224 in the desired position by tightening knob 228. To obtain a compound angle cut, the user need only to incline the portion 224, as shown in FIGS. 11B and 11C, and change the miter angle.
  • portion 224 may be rotated about hinge 226.
  • a rack on base 12 and a meshing pinion on extension 225, the user may rotate portion 224 by rotating the pinion.
  • edge nearest to blade 14B of portions 204, 214 and 224 are preferably inclined, creating a gap for clearing blade 14B when inclined.
  • the resulting gap need not be as large as the gap required by a prior art fence, thus providing appropriate support to the workpiece.
  • fence assembly 230 is interconnected with the base 12 and extends laterally across the table assembly 13 against which the workpiece M is fixedly positioned and supported for performing a cutting operation thereon.
  • fence assembly 230 is disposed on both left and right sides of saw 10.
  • Fence assembly 230 preferably comprises a workpiece supporting portion 236 attached to base 12.
  • Workpiece supporting portion 234 may be slidably received by portion 236.
  • Portion 234 preferably has a substantially vertical work supporting surface 234S.
  • Portion 236 may also have a substantially vertical surface, which may be coplanar with surface 234S.
  • portion 234 has an extension 234E which is slidably received in a channel 236C of portion 236.
  • a screw 239 may push extensions 234E against portion 236 for locking portion 234 in place.
  • the surface 234S is substantially vertical. However, by removing portion 234, inclined surface 236S of portion 236 is exposed, providing a supporting surface for an inclined workpiece M. In other words, the angle of the supporting surface of fence assembly 230 can be changed by installing or removing portion 234. To obtain a compound angle cut, the user need only to remove the portion 234, as shown in FIG. 14B, and change the miter angle.
  • fence assembly 240 is interconnected with the base 12 and extends laterally across the table assembly 13 against which the workpiece M is fixedly positioned and supported for performing a cutting operation thereon.
  • fence assembly 240 is disposed on both left and right sides of saw 10.
  • Fence assembly 240 preferably comprises a workpiece supporting portion 246 attached to base 12.
  • Portion 246 preferably has a substantially vertical work supporting surface 246S.
  • Workpiece supporting portion 244 may be pivotally attached to portion 246 via a hinge 245. Accordingly, portion 244 is preferably pivotable about an axis which is preferably coplanar to work supporting surface 246S and/or parallel to the top surface of table assembly 13.
  • the surface 246S is substantially vertical. However, by pivoting portion 244, inclined surface 244S of portion 244 is exposed, providing a supporting surface for an inclined workpiece M. In other words, the angle of the supporting surface of fence assembly 240 can be changed by moving portion 244. To obtain a compound angle cut, the user need only to move the portion 244, as shown in FIG. 17B, and change the miter angle.

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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)
EP19990302803 1998-04-09 1999-04-09 Scie à onglet à butée angulairement ajustable Expired - Lifetime EP0949048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57910 1993-05-07
US5791098A 1998-04-09 1998-04-09

Publications (3)

Publication Number Publication Date
EP0949048A2 true EP0949048A2 (fr) 1999-10-13
EP0949048A3 EP0949048A3 (fr) 2002-01-30
EP0949048B1 EP0949048B1 (fr) 2005-11-23

Family

ID=22013498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990302803 Expired - Lifetime EP0949048B1 (fr) 1998-04-09 1999-04-09 Scie à onglet à butée angulairement ajustable

Country Status (3)

Country Link
EP (1) EP0949048B1 (fr)
CN (1) CN1185084C (fr)
DE (1) DE69928467T2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2459362A (en) * 2008-04-22 2009-10-28 Black & Decker Inc Mitre saw with variable angle fence
CN102756171A (zh) * 2011-04-29 2012-10-31 苏州宝时得电动工具有限公司 斜断锯

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102275010B (zh) * 2008-12-18 2013-12-25 苏州宝时得电动工具有限公司 斜断锯
US20110308368A1 (en) * 2008-12-18 2011-12-22 Positec Power Tools (Suzhou) Co., Ltd. Miter saw
US8424434B2 (en) * 2009-04-28 2013-04-23 Robert Bosch Gmbh Universal fence for a power table saw

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297463A (en) 1991-10-09 1994-03-29 Black & Decker Inc. Adjustable fence for compound miter saw

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2150066A1 (fr) * 1994-07-08 1996-01-09 Andrew L. Itzov Support reglable pour piece a usiner de scie a onglet combinee

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297463A (en) 1991-10-09 1994-03-29 Black & Decker Inc. Adjustable fence for compound miter saw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2459362A (en) * 2008-04-22 2009-10-28 Black & Decker Inc Mitre saw with variable angle fence
CN102756171A (zh) * 2011-04-29 2012-10-31 苏州宝时得电动工具有限公司 斜断锯
CN102756171B (zh) * 2011-04-29 2015-04-22 苏州宝时得电动工具有限公司 斜断锯

Also Published As

Publication number Publication date
DE69928467D1 (de) 2005-12-29
CN1185084C (zh) 2005-01-19
EP0949048B1 (fr) 2005-11-23
DE69928467T2 (de) 2006-08-10
CN1235076A (zh) 1999-11-17
EP0949048A3 (fr) 2002-01-30

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