USH1867H - Variable cut scroll saw - Google Patents

Variable cut scroll saw Download PDF

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Publication number
USH1867H
USH1867H US08/899,938 US89993897A USH1867H US H1867 H USH1867 H US H1867H US 89993897 A US89993897 A US 89993897A US H1867 H USH1867 H US H1867H
Authority
US
United States
Prior art keywords
blade
scroll saw
disposed
frame
clamps
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.)
Abandoned
Application number
US08/899,938
Other languages
English (en)
Inventor
Ronald Quiram
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
Individual
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 Individual filed Critical Individual
Priority to US08/899,938 priority Critical patent/USH1867H/en
Assigned to BLACK & DECKER INC. reassignment BLACK & DECKER INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: QUIRAM, RONALD
Priority to TW087109492A priority patent/TW429185B/zh
Priority to CN98116101A priority patent/CN1106241C/zh
Priority to EP98305843A priority patent/EP0893186A3/en
Application granted granted Critical
Publication of USH1867H publication Critical patent/USH1867H/en
Abandoned 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
    • 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
    • B23D51/08—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 devices for mounting straight saw blades or other tools
    • B23D51/12—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 devices for mounting straight saw blades or other tools for use with tools, dealt with in this subclass, which are connected to a carrier at both ends, e.g. bows adjustable in length or height
    • B23D51/14—Attachment of the 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
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/007—Jig saws, i.e. machine saws with a vertically reciprocating narrow saw blade chucked at both ends for contour cutting

Definitions

  • This invention relates generally to scroll saws and, more particularly, to a scroll saw that can be adjusted from fine to coarse (aggressive) cutting.
  • Scroll saws are typically of three types: parallel arm scroll saws, one-piece C-arm shaped scroll saws, or cable scroll saws.
  • Parallel arm scroll saws include upper and lower horizontally extending arms which pivot in unison about vertically aligned pivot pins. Examples of such saws are shown in U.S. Pat. Nos. 4,616,541, 4,838,138 and 4,841,823.
  • C-arm shaped scroll saws connect upper and lower arms in a single C-shaped arm structure which pivots about a pivot point located on the bight end portion of the C-shaped arm structure. Examples of such saws are shown in U.S. Pat. Nos. 4,503,742, 4,625,609 and 4,646,605.
  • Cable scroll saws have cables, instead of arms, that are connected directly or indirectly to the blade holders.
  • the cable scroll saws have low moving masses, which help reduce vibration.
  • such designs produce a portable, low cost scroll saw. Examples of such saws are shown in U.S. Pat. Nos. 199,845, 1,820,294 and 2,810,410, as well as Canadian Patent Application No. 2,104,569.
  • an improved scroll saw is employed.
  • the scroll saw includes a frame with a worktable for supporting workpieces, first and second blade clamps for clamping a blade therebetween, an oscillating mechanism disposed within the frame, the oscillating mechanism moving the first and second blade clamps in a direction along a substantially vertical axis, wherein one of the first and second blade clamps is selectively shiftable so that the blade is shifted to a selected angle from the vertical axis.
  • a cam is used to move one of the blade clamps.
  • FIG. 1 is a partial cross-sectional side view of a scroll saw of the present invention
  • FIG. 2 is a side elevational view of a blade clamp shifting mechanism
  • FIGS. 3A and 3B illustrate the blade cutting path for a blade moving along a substantially vertical axis and a blade shifted to a selected angle from the vertical axis;
  • FIG. 4 is a side elevational view of an alternative blade clamp shifting mechanism
  • FIG. 5 is a partial cross-sectional rear view of the blade clamp shifting mechanism of FIG. 4;
  • FIG. 6 is a partial cross-sectional front view along line VI--VI of FIG. 1;
  • FIG. 7 is a view of the blade clamp along line VII--VII of FIG. 6; apparatus according to a second embodiment of the present invention.
  • FIGS. 8A and 8B are profiles of alternative sliding holders for use in the blade clamp.
  • a cable scroll saw 10 is shown as an exemplary scroll saw.
  • the present invention can be implemented in other types of scroll saw.
  • Scroll saw 10 of the present invention includes a frame 11.
  • frame 11 is hollow and carries most of the elements described below within.
  • the frame 11 may be C-shaped.
  • the frame 11 carries a table 12 for supporting a workpiece (not shown). It will be noted that the table 12 extends within the opening of the frame.
  • the table 12 has a slot or hole 12h, allowing a blade 26 to extend therethrough.
  • the blade 26 is held by an upper blade clamp 200 and a lower blade clamp 19.
  • An oscillating drive mechanism moves the blade clamps up and down along a substantially vertical axis.
  • the drive mechanism includes a motor 13.
  • the motor 13 rotates a driving wheel 13d, which in turn has a crank pin 13p thereon.
  • a driving pulley 15 is disposed nearby.
  • the driving pulley 15 rotates about a pivot 16, preferably connected to the frame 11.
  • the pulley 15 has a pulley pin 15p.
  • the crank pin 13p and the pulley pin 15p are connected via a connecting arm 14, so that, when the motor 13 rotates the driving wheel 13d, the pulley 15 will also rotate.
  • the driving pulley 15 will oscillate instead of making full revolutions.
  • a cable 25, preferably made of stainless steel, connecting the upper blade clamp 200 and the lower blade clamp 19 is disposed around the driving pulley 15. Because of the oscillating motion of the driving pulley 15, the cable 25 will also oscillate. Persons skilled in the art will recognize that cable 25 can be attached to the pulley 15 to prevent slippage.
  • the upper pulley 21 is connected to a lever 23.
  • the lever 23 is pivotally connected about pivot 20. Accordingly, the lever 23, and thus the upper pulley 21, can pivot about pivot 20. By rotating the upper pulley 21 towards the rear, the tension of the cable 25 is diminished, allowing for easy blade removal as discussed below.
  • the pivot 20 is part of a carrying assembly 42.
  • the carrying assembly has a detent mechanism in order to maintain the lever 23 at a certain position, so that cable tension is at a maximum.
  • the detent mechanism includes a detent ball 24 biased by a spring 43 against lever 23.
  • the lever 23 has a detent hole 44 that receives the ball 24.
  • the lever 23 has an extension 27, preferably arcuate-shaped, which contacts the ball 24 while the lever 23 is being rotated.
  • Stops 28,29 are preferably provided on the extension 27 and the lever 23 to limit the range of rotational movement of lever 23. These stops 28,29 contact the carrying assembly 42.
  • the carrying assembly 42 and thus the upper pulley 21, may be moved up and down, also affecting cable tension. This may be done via a threaded shaft 40 having threads 41 which mesh with threads in the carrying assembly 42.
  • the carrying assembly 42 is preferably disposed in channels 45 at both ends, limiting any rotational movement. Accordingly, as a user rotates the shaft 40 via knob 22, the rotational movement of the shaft 40 is translated into vertical linear movement of the carrying assembly 42.
  • Shaft 40 may also be provided with a retainer ring 46 to prevent accidental removal of the shaft 40.
  • a shifting mechanism 30 is preferably disposed next to the upper blade clamp 200. This mechanism allows the user to move the blade clamp 200 in order to change the angle of the blade 26 relative to the vertical axis, changing the type of cut. Persons skilled in the art will recognize that the shifting mechanism may be placed next to the cable 25 or pulley 21 to achieve the same result. Accordingly, such solutions are equivalent to the one described below.
  • a preferred embodiment of the shifting mechanism 30 includes a cam 300 having a camming surface 31 contacting the blade clamp 200.
  • the cam 300 pivots about pivot 33 and is kept on the pivot 33 by a retainer ring 37.
  • Pivot 33 may be fixedly connected to the frame 11.
  • a user need only move lever 32 to vary how much the blade clamp 200 is shifted.
  • the camming surface 31 then moves the blade clamp 200.
  • the camming surface 31 is calibrated so that the shift amount of the blade clamp 200 is directly proportional to the cam movement about pivot 33.
  • FIG. 3A illustrates the cutting path of blade 26 when it moves along a substantially vertical axis, where the solid lines show the middle position, the broken lines show the higher position and the dotted lines show the lower position. This cutting path is used for fine work.
  • FIG. 3B illustrates the cutting path of blade 26 when the blade clamp 200 has been shifted. Again, the solid lines show the middle position, the broken lines show the higher position and the dotted lines show the lower position. As shown in FIG. 3B, the cutting path is more aggressive and allows for faster, yet coarser, cuts.
  • a locking track 35 fixedly connected to the frame 11 has an arcuate slot 35s, which follows the arcuate trajectory of a boss 34 disposed on the lever 32.
  • a thumbscrew or wingnut 36 can then be disposed on the other side of the track 35. A user need only to screw on the wingnut 36 to fix the position of cam 300.
  • the upper blade clamp 200 has a body 201.
  • the body 201 has inclined surfaces 202.
  • the inclined surfaces 202 are exposed.
  • Channels 203 for carrying sliding/rolling elements are provided underneath the inclined surfaces 202.
  • the preferred sliding/rolling element is a ball 204.
  • the channel 203 is shallow enough that a portion of the ball 204 extends through and above a slot 205 on the inclined surface 202. It is also preferable that the slot 205 be narrow enough to ensure that the ball 204 is kept within the channel 203.
  • a user In order to install the blade 26, a user must release the cable tension by moving lever 23 or by lowering carrying assembly 42. Then the user inserts the blade 26 between the inclined surfaces 202. The balls 204 slide or roll upward and then fall back down, clamping the blade 26 therebetween. The user can then restore the cable tension.
  • the user again releases the cable tension as discussed above and lifts and/or pulls the blade 26 towards the user, until the blade 26 is removed.
  • FIGS. 8A and 8B show two alternative sliding elements 207, which slide along channels 203 to perform the same function as ball 204.
  • the elements 207 may be cylindrical. It may also be advantageous to provide projections 206 on the elements 207 to better grasp the blade 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)
US08/899,938 1997-07-24 1997-07-24 Variable cut scroll saw Abandoned USH1867H (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US08/899,938 USH1867H (en) 1997-07-24 1997-07-24 Variable cut scroll saw
TW087109492A TW429185B (en) 1997-07-24 1998-06-15 Scroll saw and method for varying cut type in the scroll saw
CN98116101A CN1106241C (zh) 1997-07-24 1998-07-14 可变切割线锯及锯切方法
EP98305843A EP0893186A3 (en) 1997-07-24 1998-07-22 Variable cut scroll saw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/899,938 USH1867H (en) 1997-07-24 1997-07-24 Variable cut scroll saw

Publications (1)

Publication Number Publication Date
USH1867H true USH1867H (en) 2000-10-03

Family

ID=25411754

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/899,938 Abandoned USH1867H (en) 1997-07-24 1997-07-24 Variable cut scroll saw

Country Status (4)

Country Link
US (1) USH1867H (zh)
EP (1) EP0893186A3 (zh)
CN (1) CN1106241C (zh)
TW (1) TW429185B (zh)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6591729B1 (en) * 2000-06-09 2003-07-15 Gregory M. Novak Portable band saw for cutting meat
US6725757B1 (en) * 2003-02-18 2004-04-27 Pei-Lieh Chiang Scroll saw with a saw blade that is easy to replace
US20040168555A1 (en) * 2003-02-06 2004-09-02 Robert Donovan Band saw
US20070266838A1 (en) * 2006-05-17 2007-11-22 Rexon Industrial Corp., Ltd. Saw blade mounting structure of a scroll saw
US7311029B2 (en) 2002-08-09 2007-12-25 Black & Decker Inc. Quick-pin blade tensioning device
US7484301B1 (en) * 2006-07-03 2009-02-03 Antonio Hughes Hacksaw with a reciprocating blade
US20110197457A1 (en) * 2008-07-31 2011-08-18 Wackwitz Jeffrey M Band saw blade removal mechanism
US20150096419A1 (en) * 2013-10-08 2015-04-09 Robert Bosch Gmbh Power Tool System
CN108856883A (zh) * 2018-08-21 2018-11-23 任广伟 一种电动往复锯
US20190015914A1 (en) * 2017-07-14 2019-01-17 Jose Medeiros Reciprocating Cutting Device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433978A (zh) * 2013-08-19 2013-12-11 苏州市胜能弹簧五金制品有限公司 一种手持式钢丝切割机
CN108943032A (zh) * 2017-05-24 2018-12-07 吕共生 一种带线锯功能的军刀
CN111136334B (zh) * 2019-12-23 2021-06-01 中国有色桂林矿产地质研究院有限公司 一种锻造六面顶压机铰链梁的切割方法
CN116174810B (zh) * 2023-03-27 2023-10-13 无锡协和精密模切件有限公司 高精度数控带锯机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US199845A (en) * 1878-01-29 Improvement in scroll-sawing machines
US1467720A (en) * 1921-06-25 1923-09-11 Wm A Field Company Jig saw
US4238884A (en) * 1979-06-19 1980-12-16 Black & Decker Inc. Orbital jig saw
US4342241A (en) * 1977-01-27 1982-08-03 Kockums Industri Ab Band sawing method
US4356750A (en) * 1979-11-29 1982-11-02 Benchmark Tool Company Band saw tension and tracking assembly
US4825741A (en) * 1987-04-03 1989-05-02 Rio Grande-Albuquerque, Inc. Reciprocatory machine tool
US5018420A (en) * 1987-05-22 1991-05-28 Mefina S.A. Machine tool
US5267498A (en) * 1991-08-20 1993-12-07 Ryobi Limited Fret-saw machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520081A (en) * 1994-02-18 1996-05-28 R. B. Industries, Inc. Multiple position blade holder for scroll saw

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US199845A (en) * 1878-01-29 Improvement in scroll-sawing machines
US1467720A (en) * 1921-06-25 1923-09-11 Wm A Field Company Jig saw
US4342241A (en) * 1977-01-27 1982-08-03 Kockums Industri Ab Band sawing method
US4238884A (en) * 1979-06-19 1980-12-16 Black & Decker Inc. Orbital jig saw
US4356750A (en) * 1979-11-29 1982-11-02 Benchmark Tool Company Band saw tension and tracking assembly
US4825741A (en) * 1987-04-03 1989-05-02 Rio Grande-Albuquerque, Inc. Reciprocatory machine tool
US5018420A (en) * 1987-05-22 1991-05-28 Mefina S.A. Machine tool
US5267498A (en) * 1991-08-20 1993-12-07 Ryobi Limited Fret-saw machine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6591729B1 (en) * 2000-06-09 2003-07-15 Gregory M. Novak Portable band saw for cutting meat
US7311029B2 (en) 2002-08-09 2007-12-25 Black & Decker Inc. Quick-pin blade tensioning device
US8381624B2 (en) 2003-02-06 2013-02-26 Chang Type Industrial Co., Ltd. Band saw
US20040168555A1 (en) * 2003-02-06 2004-09-02 Robert Donovan Band saw
US6725757B1 (en) * 2003-02-18 2004-04-27 Pei-Lieh Chiang Scroll saw with a saw blade that is easy to replace
US20070266838A1 (en) * 2006-05-17 2007-11-22 Rexon Industrial Corp., Ltd. Saw blade mounting structure of a scroll saw
US7484301B1 (en) * 2006-07-03 2009-02-03 Antonio Hughes Hacksaw with a reciprocating blade
US20110197457A1 (en) * 2008-07-31 2011-08-18 Wackwitz Jeffrey M Band saw blade removal mechanism
US8567295B2 (en) * 2008-07-31 2013-10-29 Milwaukee Electric Tool Corporation Band saw blade removal mechanism
US20150096419A1 (en) * 2013-10-08 2015-04-09 Robert Bosch Gmbh Power Tool System
US10500656B2 (en) * 2013-10-08 2019-12-10 Robert Bosch Gmbh Power tool system
US20190015914A1 (en) * 2017-07-14 2019-01-17 Jose Medeiros Reciprocating Cutting Device
CN108856883A (zh) * 2018-08-21 2018-11-23 任广伟 一种电动往复锯

Also Published As

Publication number Publication date
CN1208677A (zh) 1999-02-24
EP0893186A2 (en) 1999-01-27
TW429185B (en) 2001-04-11
CN1106241C (zh) 2003-04-23
EP0893186A3 (en) 2001-04-04

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AS Assignment

Owner name: BLACK & DECKER INC., DELAWARE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:QUIRAM, RONALD;REEL/FRAME:008966/0968

Effective date: 19970916

STCF Information on status: patent grant

Free format text: PATENTED CASE