Nothing Special   »   [go: up one dir, main page]

WO2003033225A1 - Dispositif de positionnement et de retenue anti-recul - Google Patents

Dispositif de positionnement et de retenue anti-recul Download PDF

Info

Publication number
WO2003033225A1
WO2003033225A1 PCT/US2001/042723 US0142723W WO03033225A1 WO 2003033225 A1 WO2003033225 A1 WO 2003033225A1 US 0142723 W US0142723 W US 0142723W WO 03033225 A1 WO03033225 A1 WO 03033225A1
Authority
WO
WIPO (PCT)
Prior art keywords
lengthwise
workpiece
adjustment
adjustment assembly
work table
Prior art date
Application number
PCT/US2001/042723
Other languages
English (en)
Inventor
Peter Jukoff
Original Assignee
Peter Jukoff
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 Peter Jukoff filed Critical Peter Jukoff
Priority to CA002459105A priority Critical patent/CA2459105C/fr
Priority to US09/977,119 priority patent/US6446687B1/en
Priority to PCT/US2001/042723 priority patent/WO2003033225A1/fr
Publication of WO2003033225A1 publication Critical patent/WO2003033225A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C5/00—Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
    • B27C5/02—Machines with table
    • B27C5/06—Arrangements for clamping or feeding work
    • 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
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/04—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
    • 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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/002—Means to press a workpiece against a guide
    • 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
    • B27B29/00—Gripping, clamping or holding devices for the trunk or log in saw mills or sawing machines; Travelling trunk or log carriages
    • 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
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • 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
    • B27G21/00—Safety guards or devices specially designed for other wood-working machines auxiliary devices facilitating proper operation of said wood-working machines

Definitions

  • the present invention relates generally to work tables for power tools and the like, and is more particularly directed to a combination workpiece positioning/hold-down and anti-kickback device for a work table.
  • a work table for a woodworking device such as a power saw, router and the like, generally includes a horizontal tabletop on which the workpiece is supported and a fence secured to the tabletop and extending in the direction of movement of the workpiece. The workpiece is moved on the upper surface of the tabletop and is guided along the fence, during a cutting or other woodworking action.
  • Featherboard and other devices are known for pressing the workpiece against the fence during such movement, and various hold-down devices are known for pressing the upper surface of the workpiece to hold the workpiece down on the tabletop. These devices have some of the following desirable features.
  • One such desirable feature is the ability to prevent kick-back of the workpiece during a woodworking operation.
  • Another desirable feature is the adjustment of the positioning or hold-down member in lengthwise, transverse and vertical directions relative to the workpiece.
  • Still another desirable feature is the ability to variably adjust the biasing force of the positioning or hold-down member against the workpiece. The applicant is not aware, however, of any devices that include all of these features in a simple arrangement.
  • a combination workpiece positioning and anti-kickback device for a work table having a fence against which a workpiece is guided includes a positioning member having a main body, and an arcuate cam surface at one edge of the main body for engaging a side surface of a workpiece on the work table; an adjustment device for moving the positioning member relative to the workpiece, the adjustment device including a lengthwise adjustment assembly movable in a lengthwise direction of movement of the workpiece along the work table for adjusting the position of the positioning member in the lengthwise direction, and a transverse adjustment assembly movable in a direction transverse to the lengthwise direction for adjusting the position of the positioning member in the transverse direction, the transverse adjustment assembly being movably connected to the lengthwise adjustment assembly; a lengthwise releasable locking device for releasably locking the lengthwise adjustment assembly relative to the work table at a desired location in the lengthwise direction; a transverse releasable locking device for releasably locking
  • a combination workpiece positioning and anti-kickback device for a work table having a fence against which a workpiece is guided includes a positioning member having a main body, and an arcuate cam surface at one edge of the main body for engaging a side surface of a workpiece on the work table; an adjustment device for moving the positioning member relative to the workpiece, the adjustment device including a lengthwise adjustment assembly movable in a lengthwise direction of movement of the workpiece along the work table for adjusting the position of the positioning member in said lengthwise direction, and a transverse adjustment assembly movable in a direction transverse to said lengthwise direction for adjusting the position of the positioning member in the transverse direction, the transverse adjustment assembly being movably connected to the lengthwise adjustment assembly; a lengthwise releasable locking device for releasably locking the lengthwise adjustment assembly relative to the work table at a desired location in the lengthwise direction; a transverse releasable locking device for releasably locking
  • a combination workpiece hold-down and anti-kickback device for a work table having a fence against which a workpiece is guided, includes a hold-down member having a main body, and an arcuate cam surface at one edge of the main body for engaging an upper surface of a workpiece on the work table; an adjustment device for moving the hold-down member relative to the workpiece, the adjustment device including a lengthwise adjustment assembly movable in a lengthwise direction of movement of the workpiece along the work table for adjusting the position of the hold-down member in the lengthwise direction, and a vertical adjustment assembly movable in a vertical direction transverse to the lengthwise direction for adjusting the position of the hold-down member in the vertical direction, the vertical adjustment assembly being movably connected to the lengthwise adjustment assembly; a lengthwise releasable locking device for releasably locking the lengthwise adjustment assembly relative to the work table at a desired location in the lengthwise direction; a vertical releasable locking device for
  • a combination workpiece positioning, hold-down and anti-kickback device for a work table having a fence against which a workpiece is guided includes a first positioning member having a main body, and a first arcuate cam surface at one edge of the main body for engaging a side surface of a workpiece on the work table; a first adjustment device for moving the first positioning member relative to the workpiece, the adjustment device including a first lengthwise adjustment assembly movable in a lengthwise direction of movement of the workpiece along the work table for adjusting the position of the positioning member in the lengthwise direction, and a first transverse adjustment assembly movable in a direction transverse to the lengthwise direction for adjusting the position of the positioning member in the transverse direction, the transverse adjustment assembly being movably connected to the lengthwise adjustment assembly; a first lengthwise releasable locking device for releasably locking the lengthwise adjustment assembly relative to the work table at a desired location in the lengthwise direction; a first transverse re
  • a combination workpiece positioning, hold-down and anti-kickback device for a work table having a fence against which a workpiece is guided, includes a first positioning member having a main body, and a first arcuate cam surface at one edge of the main body for engaging a side surface of a workpiece on the work table; a first adjustment device for moving the first positioning member relative to the workpiece, the adjustment device including a first lengthwise adjustment assembly movable in a lengthwise direction of movement of the workpiece along the work table for adjusting the position of the positioning member in said length-wise direction, and a first transverse adjustment assembly movable in a direction transverse to said lengthwise direction for adjusting the position of the positioning member in the transverse direction, the transverse adjustment assembly being movably connected to the lengthwise adjustment assembly; a first lengthwise releasable locking device for releasably locking the lengthwise adjustment assembly relative to the work table at a desired location in the lengthwise direction; a first transverse re
  • a combination workpiece positioning, hold-down and anti-kickback device for a work table having a fence against which a workpiece is guided includes a first positioning member having a main body, and a first arcuate cam surface at one edge of the main body for engaging a side surface of a workpiece on the work table; a first adjustment device for moving the first positioning member relative to the workpiece, the adjustment device including a first lengthwise adjustment assembly movable in a lengthwise direction of movement of the workpiece along the work table for adjusting the position of the positioning member in said length-ise direction, and a first transverse adjustment assembly movable in a direction transverse to said lengthwise direction for adjusting the position of the positioning member in the transverse direction, the transverse adjustment assembly being movably connected to the lengthwise adjustment assembly; a first lengthwise releasable locking device for releasably locking the lengthwise adjustment assembly relative to the work table at a desired location in the lengthwise direction; a first transverse
  • Fig. 1 is a perspective view of the combination workpiece positioning/hold-down and anti-kickback device according to the present invention
  • Fig. 2 is a front elevational view, partly in section, of the combination workpiece positioning/hold-down and anti-kickback device, as viewed along line 2-2 of Fig. 1;
  • Fig. 3 is an end elevational view, partly in section, of the combination workpiece positioning/hold-down and anti-kickback device, as viewed along line 3-3 of Fig. 2;
  • Fig. 4 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 4-4 of Fig. 2;
  • Fig. 5 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 5-5 of Fig. 2;
  • Fig. 6 is a top plan view, partly in section, of the combination workpiece positioning/hold-down and anti-kickback device, as viewed along line 6-6 of Fig. 1;
  • Fig. 7 is an end elevational view, partly in section, of the combination workpiece positioning/hold-down and anti-kickback device, as viewed along line 7-7 of Fig. 6;
  • Fig. 8 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 8-8 of Fig. 7; and Fig. 9 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 9-9 of Fig. 7;
  • Fig. 10 is a top plan view, partly in section, of a modified embodiment wherein locking teeth 56, 70 are replaced with mutually engaging linear gear racks;
  • Fig. 11 is an end elevational view, partly in section, of the modified embodiment of Fig. 10;
  • Fig. 12 is a cross-sectional view of the modified embodiment shown in Figs. 10 and 11, taken along line 12-12 in Fig. 11;
  • Fig. 13 is a perspective view of the combination workpiece positioning/hold-down and anti-kickback device according to another embodiment of the present invention.
  • Fig. 14 is a front elevational view, partly in section, of the combination workpiece positioning/hold-down and anti-kickback device, as viewed along line 14-14 of Fig. 13;
  • Fig. 15 is an end elevational view, partly in section, of the combination workpiece positioning/hold-down and anti-kickback device, as viewed along line 15-15 of Fig. 14;
  • Fig. 16 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 16-16 of Fig. 13;
  • Fig. 17 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 17-17 of Fig. 16;
  • Fig. 18 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 18-18 of Fig. 17;
  • Fig. 19 is a cross-sectional view of the combination workpiece positioning/hold-down and anti-kickback device, taken along line 19-19 of Fig. 17;
  • Fig. 20 is a top plan view, partly in section, of a modified embodiment of the present invention.
  • Fig. 21 is cross-sectional view of the modified embodiment of Fig. 20 taken along line 21-21 of Fig. 20;
  • Fig. 22 is a top plan view, partly in section of another modified embodiment of the present invention.
  • Fig. 23 is a perspective view of the combination workpiece positioning/hold-down and anti-kickback device according to the embodiment shown in Fig. 22.
  • a combination workpiece positioning/hold-down and anti-kickback device 10 is designed for a use with a work table 12 having a tabletop 14 with an upper surface 16 and opposite transverse sides 18 and 20.
  • a fence 22 is secured at one edge of work table 12.
  • a workpiece 24, such as a piece of wood is positioned on upper surface 16 and against fence 22.
  • a woodworking operation is performed by a woodworking tool such as a saw, router 26 and the like, while workpiece 24 is moved in the lengthwise direction 27 of work table 12, against fence 22.
  • combination workpiece positioning/hold-down and anti-kickback device 10 includes a positioning member 28 having a main body 30 with a generally oblong shape, and an arcuate cam surface 32 at one shorter edge of main body 30 for engaging a side surface of workpiece 24 on work table 12.
  • Positioning member 28 can be made of a plastic material, a Teflon (trademark) like material, or the like.
  • main body 30 is oriented substantially in a direction 34 transverse to lengthwise direction 27.
  • arcuate cam surface 32 has a curvature with an increasing radius in a direction opposite to the direction 27 of movement of workpiece 24 along work table 12 such that smaller radius portions 32a of arcuate cam surface 32 extend closer toward workpiece 24 than larger radius portions 32b of arcuate cam surface 32. This means that, as positioning member 28 is pivoted about a fixed pivot pin, as will be described hereinafter, engagement with smaller radius portions 32a provides a stronger biasing action.
  • a pivot pin 36 which is fixed to main body 30 at a side opposite from arcuate cam surface 32, is pivotally mounted to an adjustment device 38 for moving positioning member 28 relative to workpiece 24.
  • adjustment device 38 includes a lengthwise adjustment assembly 40 movable in lengthwise direction 27 for adjusting the position of positioning member 28 in lengthwise direction 27, and a transverse adjustment assembly 42 movable in transverse direction 34 for adjusting the position of positioning member 28 in transverse direction 34, with transverse- adjustment
  • Lengthwise adjustment assembly 40 includes a first guide track 44 extending in lengthwise direction 27 and a second guide track 46 extending in lengthwise direction 27, second guide track 46 being collinear with first guide track 44, with a gap 48 between first and second guide tracks 44 and 46.
  • Positioning member 28 is located in gap 48.
  • Each guide track 44 and 46 includes two spaced apart and parallel grooves 50 and 52 therein, the purpose for which will become apparent from the discussion hereinafter.
  • side plates 54 are secured to sides of guide tracks 44 and 46 at adjacent ends of guide tracks 44 and 46, with upper edges of side plates 54 having short locking teeth 56 thereon.
  • Lengthwise adjustment assembly 40 further includes a guide rail 58 mounted on top of guide tracks 44 and 46 and interconnecting guide tracks 44 and 46.
  • guide rail 58 lies above gap 48, with pivot pin 36 being pivotally mounted in a recess 60 at the underside of guide rail 58.
  • guide rail 58 includes a downwardly extending stop pin 62 which limits the angular pivoting range of positioning member 28.
  • Guide rail 58 includes two spaced apart and parallel, lengthwise extending rods 64 and 66 secured to an underside thereof by countersunk screws 67 (Fig. 8), and which slidably extend within grooves 50 and 52, respectively, to prevent transverse movement of guide rail 58 relative to guide tracks 44 and 46.
  • guide rail 58 includes side plates 68 at opposite ends thereof, each having locking teeth 70 at the lower edge thereof which engage with locking teeth 56 of side plates 54 of first and second guide tracks 44 and 46, to prevent relative lengthwise movement therebetween when guide rail 58 is clamped to guide tracks 44 and 46, as will be described hereinafter.
  • a lengthwise releasable locking device 72 which effectively releasably locks lengthwise adjustment assembly 40 relative to work table 12 at a desired location in lengthwise direction 27.
  • lengthwise releasable locking device 72 includes two releasable clamping devices 74 for releasably clamping guide rail 58 to first and second guide tracks 44 and 46 at a desired location therealong.
  • each releasable clamping device 74 includes a bolt 76 extending through a vertically oriented hole 78 in each guide track 44 and 46.
  • the lower end of hole 78 can have a hexagonal recess 80 therein for receiving the hexagonal bolt head 76a.
  • Guide rail 58 includes two aligned through slots 82 at opposite ends thereof, each through slot 82 extending in lengthwise direction 27. Each bolt 76 thereby extends through hole 78 and a respective through slot 82, and then to a position above guide rail 58, where it threadedly receives a nut 84 thereon. A clamping head 86 is secured to nut 84.
  • clamping head 86 As clamping head 86 is rotated, nut 84 is caused to rotate, whereby clamping head 86 moves down in order to press guide rail 58 onto guide tracks 44 and 46, and thereby releasably lock guide rail 58 to guide tracks 44 and 46. In such condition, guide rail 58 and guide tracks 44 and 46 form a unitary assembly.
  • guide rail 58 can move in lengthwise direction 27. Since posit ⁇ oning member 28 is pivotally mounted to guide rail 58, positioning member 28 is also moved in lengthwise direction 27 for adjusting the position thereof.
  • a coil spring 88 is connected between positioning member 28 and adjustment device 38 for biasing positioning member 28 with a biasing force in a first pivot direction 90 about pivot pin 36 such that arcuate cam surface 32 is biased in a direction opposite to feed direction 27 of workpiece 24 and into engagement with the side surface of workpiece 24.
  • an eyelet 92 is secured to the side edge of positioning member 28 which is opposite arcuate cam surface 32, with one end of spring 88 secured to eyelet 92.
  • the opposite end of spring 88 is secured to a threaded rod 94 which forms part of a variable tensioning device 96 for variably adjusting the biasing force of spring 88.
  • Rod 94 extends through an opening 98 in an L-shaped bracket 100 which is secured to the side edge of guide rail 58, and a wing nut 102 is threaded to the end of rod 94 extending out through opening 98.
  • positioning member 28 is pivoted in pivot direction 90 about pivot pin 36 with a biasing force which is variably adjustable by tightening or loosening wing nut 102.
  • transverse adjustment assembly 42 which is movable in transverse direction 34.
  • Transverse adjustment assembly 42 includes a first abutment 104 in the form of an L-shaped bracket fixed to the lower surface of first guide track 44 for engaging one transverse side 18 of work table 12 and a second abutment 116 for engaging the opposite transverse side 20 of work table 12.
  • a transverse release locking device 105 includes an overcenter clamp 106 fixed to the lower surface of second guide track 46, with overcenter clamp 106 having a handle 108 pivotally secured to a linkage 110 that is slidably mounted to the lower surface of second guide track 46 by a holder 112.
  • a threaded rod 114 is threadedly secured to the end of linkage 110, and second abutment 116 is secured to the opposite end of threaded rod 114.
  • threaded rod 114 is turned so as to move second abutment 116 closer to or farther away from handle 108 in lengthwise direction 27. This is performed until abutments 104 and 116 loosely abut against transverse sides 18 and 20 of work table 12. Then, handle 108 is pivoted to a closed position, thereby moving threaded rod 114 away from it, whereby first and second abutments 104 and 116 tightly engage tabletop 14. In this manner, positioning member 28 can be moved toward or away from workpiece 24, and be secured in a desired transverse position.
  • the position of positioning member 28 in lengthwise direction 27 is first adjusted by lengthwise adjustment assembly 40. Thereafter, the position of positioning member 28 in transverse direction 34 is adjusted by transverse adjustment assembly 42. Wing nut 102 is then rotated to adjust the spring biasing force.
  • combination workpiece positioning/hold-down and anti-kickback device 10 includes a hold-down member 128 having a main body 130 with a generally oblong shape, and an arcuate cam surface 132 at one shorter edge of main body 130 for engaging an upper surface of workpiece 24 on work table 12.
  • Hold-down member 128 can be made of a plastic material, a Teflon (trademark) like material, or the like.
  • main body 130 is oriented substantially in a vertical direction 134 transverse to lengthwise direction 27.
  • arcuate cam surface 132 has a curvature with an increasing radius in a direction opposite to the direction 27 of movement' of workpiece 24 along work table 12 such that smaller radius portions 132a of arcuate cam surface 132 extend closer toward workpiece 24 than larger radius portions 132b of arcuate cam surface 132.
  • a pivot pin 136 which is fixed to main body 130 at a side opposite from arcuate cam surface 132, is pivotally mounted to an adjustment device 138 for moving hold-down member 128 relative to workpiece 24.
  • adjustment device 138 includes a lengthwise adjustment assembly 140 movable in lengthwise direction 27 for adjusting the position of hold-down member 128 in lengthwise direction 27, and a vertical adjustment assembly 142 movable in vertical direction 134 for adjusting the position of hold-down member 128 in vertical direction 134, with vertical adjustment assembly 142 being movably connected to lengthwise adjustment assembly 140.
  • Lengthwise adjustment assembly 140 includes a guide track 144 extending in lengthwise direction 27.
  • Guide track 144 is formed by a generally tubular member 145 of a square cross-section and having a slot 147 running the length at the upper surface thereof.
  • Lengthwise adjustment assembly 140 further includes a guide rail 158 slidably mounted on top of guide track 144.
  • a lengthwise releasable locking device 172 is provided, which effectively releasably locks lengthwise adjustment assembly 140 relative to work table 12 at a desired location in lengthwise direction 27.
  • lengthwise releasable locking device 172 includes a releasable clamping device 174 for releasably clamping guide rail 158 to guide track 144 at a desired location therealong.
  • releasable clamping device 174 includes a bolt 176 extending through slot 147 and a hole 178 in guide rail 158, with bolt head 176a being received in guide rail 144.
  • the opposite end of bolt 176 extends into guide rail 158 where it is engaged with a clamp 177 having a rotatable handle 179 (shown in Figs. 1, 2 and 5).
  • handle 179 When handle 179 is rotated in one direction, bolt 176 is pulled up, so that bolt head 176a engages with guide track 144 so as to releasably lock guide rail 158 to guide track 144.
  • handle 179 is rotated in the opposite direction, bolt 176 is lowered, thereby permitting sliding movement of guide rail 158 on guide track 144 to adjust the lengthwise position thereof.
  • adjustment device 138 In order to move hold-down member 128 in vertical direction 134, that is, closer to or farther away from workpiece 24, adjustment device 138 includes vertical adjustment assembly 142 which is movable in vertical direction 134.
  • Vertical adjustment assembly 142 includes two vertically oriented rods 181 extending upwardly from guide rail 158 in parallel, spaced apart relation.
  • a guide block 183 is slidably mounted along vertically oriented rods 181.
  • guide block 183 has two T-shaped slots 185 extending in vertical direction 134.
  • a vertical releasable locking device 205 includes a releasable clamp 207 secured to guide block 183 for releasably engaging vertically oriented rods 181.
  • a bolt 209 extends through each T-shaped slot 185 such that the respective rod 181 is captured in the T-shaped slot 185 between the bolt head 209a and guide block 183.
  • a clamp head 211 threadedly receives the free end of bolt 209 extending through T-shaped slot 185.
  • bolt head 209a When clamp head 211 is tightened, bolt head 209a clamps the respective rod 181 against guide block 183 to releasably lock guide block 183 in a desired vertical position. When clamp head 211 is loosened, bolt head 209a no longer clamps the rod 181, so that guide block 183 is free to move along rods 181.
  • a coil spring 188 is connected between hold-down member
  • adjustment device 138 for biasing hold-down member 128 with a biasing force in a first pivot direction 190 about pivot pin 136 such that arcuate cam surface 132 is biased in a direction opposite to feed direction 27 of workpiece 24 and into engagement with the upper surface of workpiece 24.
  • an eyelet 192 is secured to a side edge of hold-down member 128 which is transverse to arcuate cam surface 132, with one end of spring 188 secured to eyelet 192.
  • the opposite end of spring 188 is secured to a threaded rod 194 which forms part of a variable tensioning device 196 for variably adjusting the biasing force of spring 188.
  • Rod 194 extends through an opening 198 in an L-shaped bracket 200 which is secured to guide block 183, and a nut 202 is threaded to the end of rod 194 extending out through opening 198.
  • the position of hold-down member 128 in lengthwise direction 27 is first adjusted by lengthwise adjustment assembly 140. Thereafter, the position of hold-down member 128 in vertical direction 134 is adjusted by vertical adjustment assembly 142. Nut 202 is then rotated to adjust the spring biasing force.
  • spring 188 rotates arcuate cam surface 132 of hold-down member 128 into engagement with the upper surface of workpiece 24 with a light spring tension. Thus, workpiece 24 is pushed down. It is to be pointed out that the material of hold-down member 128 and the spring force on hold-down member 128 do not damage workpiece 24, even if workpiece 24 is made from a soft wood material, such as pine.
  • the side and upper surface of workpiece 24 are held or biased, while preventing kick-back thereof.
  • positioning member 28 is adjustable in lengthwise and transverse directions relative to workpiece 24, while hold-down member 128 is adjustable in lengthwise and vertical directions relative to workpiece 24.
  • the biasing force of the positioning or hold-down member against workpiece 24 is variably adjustable.
  • Figs. 10-12 illustrate a modified embodiment wherein the locking teeth 56, 70 and the side plates are eliminated so as to provide smooth mating (facing) surfaces for guide tracks 44, 46 and guide rail 58.
  • Locking of the members 46, 58 relative to each other is achieved by providing a linear gear rack 150 in each of grooves 50 (of Fig. 1) of each of members 44, 46 and by providing a mating linear gear rack section 160 in the upper clamping part 58 which clamps against the lower gear rack 150. See Fig. 12.
  • a linear gear rack such as a spur gear rack manufactured by Boston Gear (part No. L505-4) having a pitch of 24 teeth per inch and a width of about 1/4 inch is mounted in mounting groove 164 of each of members 44, 46.
  • the linear gear rack 150 is stationary relative to the respective guide tracks 44, 46.
  • a clamping member 74 which clamps upper guide rail 58 to lower guide rail 46 (see Fig. 12) is provided for tightening the clamping between the upper and lower guide rails 46, 58 and for mutually engaging the teeth of the lower gear rack 150 with the teeth of the upper gear rack 160.
  • FIG. 12 shows the mutually engaged teeth of the upper and lower gear racks 160, 150, respectively.
  • the clamping member 74 in Fig. 12 is similar to the clamping arrangement of Fig. 8, and a detailed description thereof is not given.
  • the clamping member 74 is loosened, the upper guide rail 58 is lifted so as to bring the teeth of the upper linear gear rack 160 out of engagement with the teeth of lower linear gear rack 150, so that the parts 46, 58 can be moved horizontally relative to each other.
  • the clamp member 74 is tightened so as to bring the teeth of the gear rack sections 150, 160 back into engagement with each other, thereby locking member 58 relative to member 46.
  • linear gear rack sections 150, 160 are maintained in position by use of screws shown in Fig. 12.
  • Other attachment could be used, such as nails rivets, adhesives, etc.
  • Figs. 10-12 which are the same as in Figs. 1-9 represent the same or similar articles as in Figs. 1-9.
  • the lower gear rack section 150 extends horizontally only from point A to point B so as to have a length L, which is substantially shorter than the length of the upper linear gear rack section 160. It is not necessary for the lower linear gear rack section 150 to extend for the full length of the upper gear rack section 160.
  • the upper gear rack section has a length L2 which is much greater than length LI of the upper gear rack section.
  • the groove 50 shown in Fig. 1 is rounded, whereas the groove for accepting the lower gear rack section 150 is rectangular to accept the gear rack section.
  • the upper groove in member 58 is made rectangular so as to accept the upper gear rack section 160.
  • the lengthwise adjustment assembly 40 includes first, second and third lengthwise adjustment members 312, 314, 316.
  • the first lengthwise adjustment member 312 is disposed in a gap between the second and third lengthwise adjustment members 314, 316.
  • the second and third lengthwise adjustment members are preferably hollow or have at least an aperture therein such that at least a portion of the first lengthwise adjustment member 312 is slidably received in each of the second and third lengthwise adjustment members 314, 316.
  • Positioning member 28 is coupled to the first lengthwise adjustment member 312 via a pivot pin 36.
  • the position of the positioning member 28 with respect to the work table 12 and workpiece 24 is adjustable by changing the orientation of the first lengthwise adjustment member 312 in relation to the second and third lengthwise adjustment members 314, 316. That is, if the positioning member 28 needs to be positioned with respect to the work table 12 at a point which is closer to the second lengthwise adjustment member 314, the first lengthwise adjustment member is slidably engaged to a greater extent within the interior portion of the second lengthwise adjusting member 314 and to a lesser extent within the interior portion of the third lengthwise adjusting member 316.
  • the first lengthwise adjustment member is slidably engaged to a greater extent within the third lengthwise adjustment member 316 and to a lesser extent within the interior portion of the second lengthwise adjusting member.
  • the first lengthwise adjustment member 312 includes a plurality of apertures 318 (preferably holes or notches) along at least one side of its length. Coupled to each of the second and third lengthwise adjustment members is a lengthwise releasable locking device 72 which includes a locking pin 320 (see Figs. 16 and 19) having a spring 322, which biases the locking pin 320 in engagement with the first lengthwise adjustment member 312, and a knob 324.
  • a lengthwise releasable locking device 72 which includes a locking pin 320 (see Figs. 16 and 19) having a spring 322, which biases the locking pin 320 in engagement with the first lengthwise adjustment member 312, and a knob 324.
  • the first lengthwise adjustment member 312 is then prevented from movement within the second and third lengthwise adjustment members 314, 316.
  • the combination workpiece positioning and anti-kickback device of Figs. 13-19 also includes a transverse adjustment assembly 42.
  • the transverse adjustment assembly 42 includes transverse releasable locking devices 105 which include first and second clamping devices 326 which are respectively coupled to and near respective ends of the second and third lengthwise adjustment members and corresponding ends of the work table 12.
  • the first and second clamping devices 326 which preferably include a knob 328 having a threaded member 330 are tightened. This secures the transverse position of the lengthwise adjustment assembly on the work table.
  • the device also includes a hold-down member 128 which provides a force on a top surface of the workpiece 24 to ensure that the workpiece remains in contact with the table top 14 of the work table 12.
  • the hold-down member includes a lengthwise adjustment assembly 140 and a vertical adjustment assembly 142 as shown in Fig. 13.
  • the lengthwise adjustment assembly is similar to that which is shown in Fig. 1 except that its longitudinal length is shorter due to the configuration of the vertical adjustment assembly as explained below.
  • Lengthwise adjustment assembly 140 includes a guide track 144 extending in lengthwise direction 27.
  • Guide track 144 is formed by a generally tubular member 145 of a .square cross-section and having a slot 147 running the length at the upper surface thereof.
  • Lengthwise adjustment assembly 140 further includes a guide rail 158 slidably mounted on top of guide track 144.
  • a lengthwise releasable locking device 172 is provided, which effectively releasably locks lengthwise adjustment assembly 140 relative to work table 12 at a desired location in lengthwise direction 27.
  • lengthwise releasable locking device 172 includes a releasable clamping device 174 for releasably clamping guide rail 158 to guide track 144 at a desired location therealong.
  • releasable clamping device 174 includes a bolt 176 extending through slot 147 and a hole 178 in guide rail 158, with bolt head 176a being received in guide rail 144.
  • the opposite end of bolt 176 extends into guide rail 158 where it is engaged with a clamp 177 having a rotatable handle 179.
  • handle 179 When handle 179 is rotated in one direction, bolt 176 is pulled up, so that bolt head 176a engages with guide track 144 so as to releasably lock guide rail 158 to guide track 144.
  • handle 179 is rotated in the opposite direction, bolt 176 is lowered, thereby permitting sliding movement of guide rail 158 on guide track 144 to adjust the lengthwise position thereof.
  • the vertical adjustment assembly 142 includes a vertical adjustment member 332 operatively coupled to the lengthwise adjustment assembly 140.
  • the vertical adjustment member 332 can be integral and contiguous with the lengthwise adjustment assembly 140.
  • the vertical adjustment member 332 is preferably oriented in non-parallel relation with respect to the work table 12, and preferably is perpendicular or substantially perpendicular to the work table 12.
  • the vertical adjustment member 332 includes a longitudinal aperture 334 along its length which extends through the hold- down member.
  • the hold-down member 128 is coupled to a mounting plate 336 by a pivot pin 136. The pivot pin is fixed to the main body 130 of the hold-down member 128 at a side opposite the arcuate cam surface.
  • the hold-down member 128 is coupled to the vertical adjustment member 332 by a clamping device 338 which extends through the longitudinal aperture 334 of the vertical adjustment member 332 and the mounting plate 336.
  • the clamping device 338 is loosened and its shaft is moved within the longitudinal aperture 334 such that the height of the hold-down member is fully adjustable in relation to the work table.
  • the clamping device is tightened to secure the height thereof.
  • FIG. 20 and 21 wherein reference numerals which are the same as in Figs. 1-12 represent the same or similar articles as in Figs. 1-12, an alternative embodiment of the lengthwise releasable locking device 172 and transverse releasable locking device 105 of the combination workpiece positioning an anti-kick back device is shown.
  • the first lengthwise adjustment member 312 slidably engages an interior portion of the second and third lengthwise adjustment members 314, 316 as described in connection with Figs. 13-19.
  • threaded rods 340 are extended through an end of each of the second and third lengthwise adjustment members 314, 316.
  • each of the second and third lengthwise adjustment members 314, 316 through which the threaded rods 340 extend is distal with respect to the positioning member 28.
  • the threaded rods include at one end thereof a knob 342 which enables the threaded rod to be rotated by hand.
  • the opposite end of the threaded rod includes a nut 344 which is fixed on the rod to indicate a maximum displacement of the first lengthwise adjustment member 312 in each lengthwise direction within the second and third lengthwise adjustment members 314, 316.
  • the position of the first lengthwise adjustment member 312 with respect to the second and third lengthwise adjustment members 314, 316 is altered by rotating at least one of the knobs 342 of the threaded rods 340 which extend within the interior portion of the second and third lengthwise adjustment members and which engage the first lengthwise adjustment member.
  • the rotation of the threaded rods alters the position of the first lengthwise adjustment member and correspondingly the positioning member 28, which is coupled thereto, with respect to the workpiece.
  • the work table 12 includes a groove 346 which is slidably engaged by a rail 348 disposed on one side of a lengthwise adjustment member 350.
  • the rail of the lengthwise adjustment member 350 slidably moves within the groove 346 in a longitudinal direction 352, but is prevented from substantial movement in the transverse direction 354.
  • the groove 346 preferably includes a lip 356 (Fig. 23) at a top portion thereof.
  • a clamping device 358 having a block 360 disposed within the groove is coupledd to the lengthwise adjustment member 350. When the clamping device is tightened, the block engages the lip 356 of the groove 346. As a result, movement of device is the lengthwise adjustment member 350 in the longitudinal direction 352 is prevented.
  • a transverse adjustment assembly 42 which is movable in a direction 354 transverse to the lengthwise direction 352.
  • the transverse adjustment assembly adjusts the position of the positioning member 28 in the transverse direction.
  • the positioning member is preferably coupled to one end of a transverse adjustment member 362.
  • the coupling of the positioning member 28 to the transverse adjustment member 362 via pivot pin 36 and the biasing of the positioning member with spring 88 is similar to that previously described and for brevity will not be repeated here.
  • the transverse adjustment member 362 preferably includes an elongated aperture 364 which extends along the longitudinal length of the transverse adjustment member 362 and therethrough.
  • a transverse releasable locking device 105 is included such as the threaded rod, having a knob 368 at one end thereof, as shown in Fig. 23.
  • the lengthwise adjustment member 350 includes an aperture 368 for receiving an end of the threaded rod 366.
  • the threaded rod extends through the elongated aperture 364 of the transverse adjustment member 362 and engages the aperture 368 of the lengthwise adjustment member 350.
  • the locking device 105 When in a non-locked position, the locking device 105 enables movement of the transverse adjustment member while the threaded rod remains engaged in the elongated aperture 364 and the aperture 368.
  • the transverse releasable locking device 105 maintains the position of the transverse adjustment member 362 with respect to the lengthwise adjustment member

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

L'invention se rapporte à un dispositif combiné de positionnement et de retenue de pièces à travailler anti-recul, pour une table porte-pièces (12) comportant une barre d'appui (22) le long de laquelle est guidée une pièce à travailler (24). Ledit dispositif comprend : un élément de positionnement non rotatif (28) possédant une surface de came courbe (32) sur un côté, laquelle vient en prise avec une surface latérale de la pièce à travailler sur la table porte-pièces ; un dispositif d'ajustement (38) déplaçant l'élément de positionnement dans les sens longitudinal et transversal ; un pivot (36) fixant en position pivotante l'élément de positionnement au dispositif d'ajustement ; un ressort (88) relié à l'élément de positionnement et au dispositif d'ajustement, de façon à solliciter l'élément de positionnement dans un sens donné par le pivot, pour qu'il vienne en prise avec la surface latérale de la pièce à travailler ; un tendeur variable (94) ; un élément de retenue non rotatif (128) possédant une seconde surface de came courbe (132) sur un côté, laquelle vient en prise avec une surface supérieure de la pièce à travailler ; un dispositif d'ajustement (138) ; un pivot (136) fixant en position pivotante l'élément de retenue au second dispositif d'ajustement ; un second ressort (188) relié à l'élément de retenue et au dispositif d'ajustement (194) ; et un second tendeur variable permettant de régler la force de sollicitation exercée par le second ressort.
PCT/US2001/042723 1999-01-14 2001-10-12 Dispositif de positionnement et de retenue anti-recul WO2003033225A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002459105A CA2459105C (fr) 2001-10-12 2001-10-12 Dispositif de positionnement et de retenue anti-recul
US09/977,119 US6446687B1 (en) 1999-01-14 2001-10-12 Combination workpiece positioning/hold-down and anti-kickback device for a work table
PCT/US2001/042723 WO2003033225A1 (fr) 1999-01-14 2001-10-12 Dispositif de positionnement et de retenue anti-recul

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11593299P 1999-01-14 1999-01-14
PCT/US2001/042723 WO2003033225A1 (fr) 1999-01-14 2001-10-12 Dispositif de positionnement et de retenue anti-recul

Publications (1)

Publication Number Publication Date
WO2003033225A1 true WO2003033225A1 (fr) 2003-04-24

Family

ID=27615877

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/042723 WO2003033225A1 (fr) 1999-01-14 2001-10-12 Dispositif de positionnement et de retenue anti-recul

Country Status (1)

Country Link
WO (1) WO2003033225A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3107882A1 (fr) * 2020-03-03 2021-09-10 Psa Automobiles Sa Structure de protection à barre de retenue à position verticale variable, pour une chaîne de montage de pièces de véhicules

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US481983A (en) * 1892-09-06 Work-holder and safety-guard for universal woodworkers
US5301726A (en) * 1992-10-28 1994-04-12 Wojcik Joseph J Workpiece stabilizer for bench tools

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US481983A (en) * 1892-09-06 Work-holder and safety-guard for universal woodworkers
US5301726A (en) * 1992-10-28 1994-04-12 Wojcik Joseph J Workpiece stabilizer for bench tools

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3107882A1 (fr) * 2020-03-03 2021-09-10 Psa Automobiles Sa Structure de protection à barre de retenue à position verticale variable, pour une chaîne de montage de pièces de véhicules

Similar Documents

Publication Publication Date Title
US6619347B2 (en) Combination workpiece positioning/hold-down and anti-kickback device for a work table
US6446687B1 (en) Combination workpiece positioning/hold-down and anti-kickback device for a work table
US7210510B2 (en) Work bench
US5301726A (en) Workpiece stabilizer for bench tools
CA2234576C (fr) Scie circulaire a table
CA2330872C (fr) Banc de scie
US7140286B2 (en) Dual adjustable feather jig
US20060144203A1 (en) Work piece guiding system for a table saw
US6880442B2 (en) Woodworking machinery jig and fixture system
US5816129A (en) Miter fence for radial arm saw
CA2081649C (fr) Guide longitudinal rapidement interchangeable, a alignement automatique
US5823239A (en) Work bench
US20090095141A1 (en) Adjustable fence for a miter saw
WO2009111552A1 (fr) Scie de table manuelle et lame destinée à celle-ci
US5816300A (en) Woodworking jig
US6315016B1 (en) Combination workpiece positioning/hold-down and anti-kickback device for a work table
US6484767B2 (en) Power tool guide and work center
CA2459105C (fr) Dispositif de positionnement et de retenue anti-recul
GB2094216A (en) A clamp device for use with apparatus for guiding a power circular saw
WO2003033225A1 (fr) Dispositif de positionnement et de retenue anti-recul
US8549970B2 (en) Power saw
US5174553A (en) Adjustable lock mechanism
US6868612B2 (en) Cutting guide device for circular saws
US11529690B2 (en) Miter bar pocket hole jig systems and methods
US11045970B1 (en) Adjustable pocket-cutting device

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EE ES FI GB GD GE GH GM HU ID IL IN IS JP KE KG KP KR KZ LK LR LS LT LU LV MA MD MG MK MW MX MZ NO NZ PL PT RO RU SD SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZW AM AZ BY KG KZ MD TJ TM AT BE CH CY DE DK ES FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2459105

Country of ref document: CA

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP