CA2150186A1 - Table assembly for a conventional bench saw - Google Patents
Table assembly for a conventional bench sawInfo
- Publication number
- CA2150186A1 CA2150186A1 CA002150186A CA2150186A CA2150186A1 CA 2150186 A1 CA2150186 A1 CA 2150186A1 CA 002150186 A CA002150186 A CA 002150186A CA 2150186 A CA2150186 A CA 2150186A CA 2150186 A1 CA2150186 A1 CA 2150186A1
- Authority
- CA
- Canada
- Prior art keywords
- panel
- underframe
- table assembly
- work
- cutting tool
- 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
Links
Classifications
-
- 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
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
-
- 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
- B23D47/02—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
- B23D47/025—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier of tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/14—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top
-
- 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
- B27B5/02—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only
- B27B5/06—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels
- B27B5/065—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels with feedable saw blades, e.g. arranged on a carriage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
A table assembly is described as a replacement for the work supporting table forming part of a conventional bench saw. It includes a slidable panel having a longitudinal slot from which protrudes the upper portion of saw blades operatively mounted to the base of the bench saw. The panel is equipped with an under frame which allows the panel to move in the longitudinal axis of the saw blades. With this arrangement, a work piece placed on the top surface of the panel moves together with the panel during a good part of the sawing operation so that the front as well as the back support lengths are correspondingly increased whenever required with no need for extra floor space. Also, the work is always subjected to identical friction forces on either side of the blades, whether the work is displaced with or on a supporting and movable surface, thus eliminating the need to secure the work piece to its supporting and movable panel prior to proceed with the cutting operation.
Description
TITLE OF THE lNV~ ON
Table assembly for a conventional bench saw.
FIELD OF THB l~.V ~ ON
The present invention relates to a table assembly for mounting to the base of a conventional bench saw in replacement of the work supporting table forming part of this conventional bench saw.
BACRGROUND OF THE lNV~L. ~lON
Conventional bench saws comprise a base, a work supporting table extending over the base, a cutting tool operatively connected to a drive shaft in the base and having a portion protruding through an opening in the table, and, in some cases, means for causing vertical and angular displacements of the cutting tool relative to the table.
one such assembly for a conventional bench saw is found in applicant's U.S. patent No. 5,193,428 issued March 16, 1993. It describes an attachment assembly for mounting to a conventional bench saw of the type which is used principally by home shop owners or small manufacturers who cannot invest considerable amount of money in the presently available technology using highly sophisticated machinery. The latter, in addition to being very expensive, requires considerable amount of floor area when compared to an ordinary bench saw. Such 21~$~
machinery carries out excellent chip free cuts on either side (above and below) of a laminated board for two reasons: first, it is equipped with a second blade, called a scoring saw blade, which gives an excellent cut on the underside of the board; and secondly, it is equipped with a table for supporting, positioning and feeding boards, which table ensures a perfect alignment of the panel with the two blades during the entire cutting operation.
One major drawback of using an ordinary bench saw with large boards is that the working surface on which the work pieces slide is not correspondingly large and it has been found difficult to accurately cut large work pieces, such as plywood or melamine, having sizes for example of 4' by 8' along the entire length of the board. Indeed, the home shop owner is not equipped with the supporting and alignment devices which are required for these sizes of panels.
One type of platform structure which has been devised to facilitate supporting large pieces may be found described in U.S. patent 5,191,935 issued March 9, 1993 to McCombie. It provides a table-saw table-top jig adapted to be used on a lip-type portable table-saw for supporting and guiding large work pieces onto the table-saw blade. The table-top jig comprises a rip-fence which extends transversally along one end of the apertured 21501~6 platform. Guide rails are mounted to the platform and are used to allow the platform to move over the table-top in a direction transverse to the rip-fence. Such a movable platform does not serve the purpose of allowing increased front and back support lengths with minimum floor space requirements, since it cannot conceivably move during the process of cutting.
OBJECTS AND STATEMENT OF THE PRESENT lNV~..lON
It is an object of the present invention to overcome the above described problems with present conventional bench saws used by home shop owners or small manufacturers by providing adequate front and rear supports, as the work piece is being fed through the cutting tool, at no significant extra floor space required.
It is a further object of the present invention to provide a table assembly wherein equal friction is achieved on both sides of the cutting tool.
The present invention therefore relates to a table assembly which comprises:
an underframe adapted to be mounted to the top of the base of a conventional bench saw from which the top panel has been removed;
a panel slidably mounted to the underframe and having an upper work surface displaying a longitudinal slot; the slot has a width allowing a portion of the cutting tool means to protrude upwardly from the work surface and has a length allowing the table to slide longitudinally in a direction coinciding with the plane of the cutting tool means; and displacement means mounted to the panel beneath the work surface and cooperating with the underframe to allow the panel to move in the said direction whereby a workpiece placed on the work surface is displaced with or on the surface and subjected to identical friction forces on either side of the cutting tool means.
The present invention provides for extra and adequate front and rear work support, while each cut is being executed with limited supporting surface travel.
Indeed, the travel required for the moving surface is greatly reduced by the fact that the work piece will now be able to travel a first distance, together with the supporting panel, equal to its total designed stroke.
Thereafter, sliding will occur between the work piece and its supporting surface until the cut is completed.
Combined to the theoretical principle that a given support length, in the front or behind the cutting tool, will be sufficient to provide proper support to a work piece twice that length, and added the inherent effective dead lengths, front and rear or the cutting tool, the travel required for the sliding surface is greatly reduced. Consequently, the floor space required by the ~150186 table saw piece of equipment is minimized which is particularly useful for the amateur carpenter as well as for the majority of small manufacturers (of kitchen cabinets, for example). Secondly, it eliminates the need s to fix the work piece to whatever part of the supporting surface, prior to the cutting operation, the friction forces on either side of the blades being identical at all times.
The positioning of the table assembly of the present invention is easily adjustable to a conventional bench saw base from which the standard top table will have been removed.
In one embodiment of the invention, one edge of the table is provided with an easily removable extension plate thus avoiding the conventional way of having to use additional and unstable small devices, such as support rolls, next to the working panel to support large size panels.
Other objects and further scope of applicability of the present invention will become apparent from the detailed description given hereinafter.
It should be understood, however, that this detailed description, while indicating preferred embodiments of the invention, is given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a top perspective view of a table assembly made in accordance with the present invention mounted to a conventional bench saw;
Figure 2 is a top plan view, with a central part of the panel being removed in order to illustrate the underframe;
Figure 3 is a cross sectional view taken along lines 3-3 of figure 2;
Figure 4 is a cross sectional view taken along lines 4-4 of figure 2;
Figure 5 is a cross sectional view taken along lines 5-5 of figure 4;
Figure 6 is a cross sectional view taken along lines 6-6 of figure 2;
Figure 7 is a cross sectional view taken along lines 7-7 of figure 2; and Figure 8 is a cross sectional view taken along lines 8-8 of figure 1.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to figure 1, there is shown a conventional bench saw, generally denoted 10, which 2S consists of a base or cabinet 12. A work supporting table is usually mounted over this base, but, in the 21~ fi present invention, it has been removed in order to receive, in its place, a table assembly, generally denoted 14, made in accordance with the present invention. Operatively mounted to a drive shaft (not shown) in the base 12, is a cutting tool which may consist of a main saw blade 18 and of a scoring saw blade 20, both extending in a same longitudinal plane. The construction and operation of the bench saw, except for the improved table assembly 14, does not form part of the present invention and will therefore not be described.
One example of a construction and operation of the mechanism which allows the blades 18 and 20 to be angularly adjusted relative to the work table may be found described in applicant's above identified U.S.
patent No. 5,193,428.
The table assembly 14 comprises a panel 22, formed of three sections 22a, 22b and 22c, each having a flat horizontal top work receiving surface. As described hereinbelow, this panel is adapted to move longitudinally, as indicated by arrow 26, to reach the extreme edge position identified by the dotted lines 22'.
The front edge of the panel displays an L-shaped support member 28 on which is mounted a guide 30 allowing for the transverse displacement of a rip-fence 32 having opposite work bearing faces 34. A handle 36 is used to secure the fence relative to the panel 22.
215018~
The rear edge of the panel comprises a U-shaped member 40 to which may be mounted an easily removable extension plate 42 for the long cuts, as described further hereinbelow.
The central section 22b may be formed of a more robust material, such as cast iron, with the side sections 22a and 22c made of melamine or similar material.
Referring to figure 2, the central section 22b displays an elongated longitudinal slot 44 having a width allowing the blades 18, 20 to protrude from the top face thereof. This slot extends for a major portion of the length of the central panel. The latter also includes a removable insert 46 that includes a portion of the longitudinal slot 44. This plate is removed whenever the blades 18 and 20 are required to be removed for resharpening or the like, as described in applicant's above identified U.S. patent 5,191,935.
Referring to figures 2 and 3, the table assembly also includes an underframe consisting of two transverse sides 50 and 52 and two longitudinal sides 54 and 56. This underframe has four brackets 58, 60, 62 and 64 allowing it to be secured to the top edges of the base 12 of a conventional bench saw (from which the usual top plate has been removed). The underframe also includes ~l~Q18~
four legs 66, 68, 70 and 72, each equipped with a top roller 67, 69, 71 and 73, respectively. These rollers rest on the top part of a pair of opposite cylindrical guide members 74 and 76 extending longitudinally and on each side of the table.
A series of adjusting screws 78, 80, 82 and 84 are used to accurately position the table assembly relative to the common longitudinal axis of the blades.
The guide members 74 and 76 have their opposite respective ends mounted to the wing extensions 86, 88 and 90 and 92 of the intermediate panel section 22b. They also have their mid-points mounted to mid wing extensions 91 and 93 of their corresponding panel section.
As illustrated in figures 3, 4 and 6, the guide member 76 is confined between roller 73 and a pair of rollers 94 and 96 at the leg 72 of the underframe while it is confined between roller 71 and a pair of rollers 95 and 97 at the leg 70 of the underframe. Each roller 94, 95, 96, 97 extends obliquely with respect to a vertical plane passing through the center of the guide member 76.
Rollers 94 and 96 are bolted to the lower part of leg 72 while rollers 95 and 97 are bolted to the lower part of leg 70.
21S0~ 86 Referring to figures 2, 4 and 5, engagement of cam element 104 to the guide member 76 is accomplished by rotating a handle 100 which is secured to sliding rod 102 integral with cam element 104 which, when rotated, causes it to be raised and press contact the guide member 76, resulting in releasably securing panel 22 to the base of cabinet 12 through table assembly underframe (50, 52, 54 and 56) when so desired.
Referring to figures 2 and 7, the opposite side of the underframe comprises, underneath the guide member 74, a roller 106 which is co-planar with the upper roller 67. Both rollers 67 and 106 are mounted to the leg 66 of the underframe. A similar arrangement of rollers 69 and 107 is mounted to the leg 68.
Referring to figure 8, the extension plate 42 is hooked over the back rail 111 which is bolted at 110 to the U-shaped member 40 at the rear edge of the panel.
A reinforcing support 112 is used to maintain the top face of the extension plate in the same horizontal plane as that of the top face of the panel sections 22a, 22b and 22c.
In operation, when a large board is to be cut, it is placed on the top face of the panel with one edge bearing against a surface 34 of the fence 32.
Preferably, the table will be positioned frontmost so 215~18~
that the blades 18 and 20 will be as much as possible near the rearmost position of the slot 44 near the rear edge of the panel. The panel together with the work piece are then displaced longitudinally in the direction of arrow 26 for cutting by blades 18 and 20 until a stop device (not shown) will prevent further displacement of the table, in which case the blades 18 and 20 will be near to the frontmost edge of the slot 44. If the large work piece is not entirely cut, then the operator will continue displacing the work piece by sliding it over the top face of the panel and against the side face 34 of the rip-fence 32. Hence, during the entire sawing operation, neither side of the work piece with respect to the saw blades is subjected to differing frictional forces. In lS the case of oversize boards, the extension plate 42 will enable the board to be maintained in a relatively horizontal plane during the cutting operation.
Although the invention has been described above with respect with one specific form, it will be evident to a person skilled in the art that it may be modified and refined in various ways. It is therefore wished to have it understood that the present invention should not be limited in scope, except by the terms of the following claims.
Table assembly for a conventional bench saw.
FIELD OF THB l~.V ~ ON
The present invention relates to a table assembly for mounting to the base of a conventional bench saw in replacement of the work supporting table forming part of this conventional bench saw.
BACRGROUND OF THE lNV~L. ~lON
Conventional bench saws comprise a base, a work supporting table extending over the base, a cutting tool operatively connected to a drive shaft in the base and having a portion protruding through an opening in the table, and, in some cases, means for causing vertical and angular displacements of the cutting tool relative to the table.
one such assembly for a conventional bench saw is found in applicant's U.S. patent No. 5,193,428 issued March 16, 1993. It describes an attachment assembly for mounting to a conventional bench saw of the type which is used principally by home shop owners or small manufacturers who cannot invest considerable amount of money in the presently available technology using highly sophisticated machinery. The latter, in addition to being very expensive, requires considerable amount of floor area when compared to an ordinary bench saw. Such 21~$~
machinery carries out excellent chip free cuts on either side (above and below) of a laminated board for two reasons: first, it is equipped with a second blade, called a scoring saw blade, which gives an excellent cut on the underside of the board; and secondly, it is equipped with a table for supporting, positioning and feeding boards, which table ensures a perfect alignment of the panel with the two blades during the entire cutting operation.
One major drawback of using an ordinary bench saw with large boards is that the working surface on which the work pieces slide is not correspondingly large and it has been found difficult to accurately cut large work pieces, such as plywood or melamine, having sizes for example of 4' by 8' along the entire length of the board. Indeed, the home shop owner is not equipped with the supporting and alignment devices which are required for these sizes of panels.
One type of platform structure which has been devised to facilitate supporting large pieces may be found described in U.S. patent 5,191,935 issued March 9, 1993 to McCombie. It provides a table-saw table-top jig adapted to be used on a lip-type portable table-saw for supporting and guiding large work pieces onto the table-saw blade. The table-top jig comprises a rip-fence which extends transversally along one end of the apertured 21501~6 platform. Guide rails are mounted to the platform and are used to allow the platform to move over the table-top in a direction transverse to the rip-fence. Such a movable platform does not serve the purpose of allowing increased front and back support lengths with minimum floor space requirements, since it cannot conceivably move during the process of cutting.
OBJECTS AND STATEMENT OF THE PRESENT lNV~..lON
It is an object of the present invention to overcome the above described problems with present conventional bench saws used by home shop owners or small manufacturers by providing adequate front and rear supports, as the work piece is being fed through the cutting tool, at no significant extra floor space required.
It is a further object of the present invention to provide a table assembly wherein equal friction is achieved on both sides of the cutting tool.
The present invention therefore relates to a table assembly which comprises:
an underframe adapted to be mounted to the top of the base of a conventional bench saw from which the top panel has been removed;
a panel slidably mounted to the underframe and having an upper work surface displaying a longitudinal slot; the slot has a width allowing a portion of the cutting tool means to protrude upwardly from the work surface and has a length allowing the table to slide longitudinally in a direction coinciding with the plane of the cutting tool means; and displacement means mounted to the panel beneath the work surface and cooperating with the underframe to allow the panel to move in the said direction whereby a workpiece placed on the work surface is displaced with or on the surface and subjected to identical friction forces on either side of the cutting tool means.
The present invention provides for extra and adequate front and rear work support, while each cut is being executed with limited supporting surface travel.
Indeed, the travel required for the moving surface is greatly reduced by the fact that the work piece will now be able to travel a first distance, together with the supporting panel, equal to its total designed stroke.
Thereafter, sliding will occur between the work piece and its supporting surface until the cut is completed.
Combined to the theoretical principle that a given support length, in the front or behind the cutting tool, will be sufficient to provide proper support to a work piece twice that length, and added the inherent effective dead lengths, front and rear or the cutting tool, the travel required for the sliding surface is greatly reduced. Consequently, the floor space required by the ~150186 table saw piece of equipment is minimized which is particularly useful for the amateur carpenter as well as for the majority of small manufacturers (of kitchen cabinets, for example). Secondly, it eliminates the need s to fix the work piece to whatever part of the supporting surface, prior to the cutting operation, the friction forces on either side of the blades being identical at all times.
The positioning of the table assembly of the present invention is easily adjustable to a conventional bench saw base from which the standard top table will have been removed.
In one embodiment of the invention, one edge of the table is provided with an easily removable extension plate thus avoiding the conventional way of having to use additional and unstable small devices, such as support rolls, next to the working panel to support large size panels.
Other objects and further scope of applicability of the present invention will become apparent from the detailed description given hereinafter.
It should be understood, however, that this detailed description, while indicating preferred embodiments of the invention, is given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a top perspective view of a table assembly made in accordance with the present invention mounted to a conventional bench saw;
Figure 2 is a top plan view, with a central part of the panel being removed in order to illustrate the underframe;
Figure 3 is a cross sectional view taken along lines 3-3 of figure 2;
Figure 4 is a cross sectional view taken along lines 4-4 of figure 2;
Figure 5 is a cross sectional view taken along lines 5-5 of figure 4;
Figure 6 is a cross sectional view taken along lines 6-6 of figure 2;
Figure 7 is a cross sectional view taken along lines 7-7 of figure 2; and Figure 8 is a cross sectional view taken along lines 8-8 of figure 1.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to figure 1, there is shown a conventional bench saw, generally denoted 10, which 2S consists of a base or cabinet 12. A work supporting table is usually mounted over this base, but, in the 21~ fi present invention, it has been removed in order to receive, in its place, a table assembly, generally denoted 14, made in accordance with the present invention. Operatively mounted to a drive shaft (not shown) in the base 12, is a cutting tool which may consist of a main saw blade 18 and of a scoring saw blade 20, both extending in a same longitudinal plane. The construction and operation of the bench saw, except for the improved table assembly 14, does not form part of the present invention and will therefore not be described.
One example of a construction and operation of the mechanism which allows the blades 18 and 20 to be angularly adjusted relative to the work table may be found described in applicant's above identified U.S.
patent No. 5,193,428.
The table assembly 14 comprises a panel 22, formed of three sections 22a, 22b and 22c, each having a flat horizontal top work receiving surface. As described hereinbelow, this panel is adapted to move longitudinally, as indicated by arrow 26, to reach the extreme edge position identified by the dotted lines 22'.
The front edge of the panel displays an L-shaped support member 28 on which is mounted a guide 30 allowing for the transverse displacement of a rip-fence 32 having opposite work bearing faces 34. A handle 36 is used to secure the fence relative to the panel 22.
215018~
The rear edge of the panel comprises a U-shaped member 40 to which may be mounted an easily removable extension plate 42 for the long cuts, as described further hereinbelow.
The central section 22b may be formed of a more robust material, such as cast iron, with the side sections 22a and 22c made of melamine or similar material.
Referring to figure 2, the central section 22b displays an elongated longitudinal slot 44 having a width allowing the blades 18, 20 to protrude from the top face thereof. This slot extends for a major portion of the length of the central panel. The latter also includes a removable insert 46 that includes a portion of the longitudinal slot 44. This plate is removed whenever the blades 18 and 20 are required to be removed for resharpening or the like, as described in applicant's above identified U.S. patent 5,191,935.
Referring to figures 2 and 3, the table assembly also includes an underframe consisting of two transverse sides 50 and 52 and two longitudinal sides 54 and 56. This underframe has four brackets 58, 60, 62 and 64 allowing it to be secured to the top edges of the base 12 of a conventional bench saw (from which the usual top plate has been removed). The underframe also includes ~l~Q18~
four legs 66, 68, 70 and 72, each equipped with a top roller 67, 69, 71 and 73, respectively. These rollers rest on the top part of a pair of opposite cylindrical guide members 74 and 76 extending longitudinally and on each side of the table.
A series of adjusting screws 78, 80, 82 and 84 are used to accurately position the table assembly relative to the common longitudinal axis of the blades.
The guide members 74 and 76 have their opposite respective ends mounted to the wing extensions 86, 88 and 90 and 92 of the intermediate panel section 22b. They also have their mid-points mounted to mid wing extensions 91 and 93 of their corresponding panel section.
As illustrated in figures 3, 4 and 6, the guide member 76 is confined between roller 73 and a pair of rollers 94 and 96 at the leg 72 of the underframe while it is confined between roller 71 and a pair of rollers 95 and 97 at the leg 70 of the underframe. Each roller 94, 95, 96, 97 extends obliquely with respect to a vertical plane passing through the center of the guide member 76.
Rollers 94 and 96 are bolted to the lower part of leg 72 while rollers 95 and 97 are bolted to the lower part of leg 70.
21S0~ 86 Referring to figures 2, 4 and 5, engagement of cam element 104 to the guide member 76 is accomplished by rotating a handle 100 which is secured to sliding rod 102 integral with cam element 104 which, when rotated, causes it to be raised and press contact the guide member 76, resulting in releasably securing panel 22 to the base of cabinet 12 through table assembly underframe (50, 52, 54 and 56) when so desired.
Referring to figures 2 and 7, the opposite side of the underframe comprises, underneath the guide member 74, a roller 106 which is co-planar with the upper roller 67. Both rollers 67 and 106 are mounted to the leg 66 of the underframe. A similar arrangement of rollers 69 and 107 is mounted to the leg 68.
Referring to figure 8, the extension plate 42 is hooked over the back rail 111 which is bolted at 110 to the U-shaped member 40 at the rear edge of the panel.
A reinforcing support 112 is used to maintain the top face of the extension plate in the same horizontal plane as that of the top face of the panel sections 22a, 22b and 22c.
In operation, when a large board is to be cut, it is placed on the top face of the panel with one edge bearing against a surface 34 of the fence 32.
Preferably, the table will be positioned frontmost so 215~18~
that the blades 18 and 20 will be as much as possible near the rearmost position of the slot 44 near the rear edge of the panel. The panel together with the work piece are then displaced longitudinally in the direction of arrow 26 for cutting by blades 18 and 20 until a stop device (not shown) will prevent further displacement of the table, in which case the blades 18 and 20 will be near to the frontmost edge of the slot 44. If the large work piece is not entirely cut, then the operator will continue displacing the work piece by sliding it over the top face of the panel and against the side face 34 of the rip-fence 32. Hence, during the entire sawing operation, neither side of the work piece with respect to the saw blades is subjected to differing frictional forces. In lS the case of oversize boards, the extension plate 42 will enable the board to be maintained in a relatively horizontal plane during the cutting operation.
Although the invention has been described above with respect with one specific form, it will be evident to a person skilled in the art that it may be modified and refined in various ways. It is therefore wished to have it understood that the present invention should not be limited in scope, except by the terms of the following claims.
Claims (11)
1. A table assembly for mounting to the base of a conventional bench saw in replacement of the conventional work supporting table forming part of said conventional bench saw, said base including cutting tool means having a portion thereof partially protruding from the plane of said table; said assembly comprising:
an underframe adapted to be mounted to top of the base of a conventional bench saw from which a top panel has been removed;
a panel slidably mounted to said underframe and having an upper work surface displaying a longitudinal slot; said slot having a width allowing said portion of said cutting tool means to protrude upwardly from said work surface and having a length allowing said table to slide longitudinally in a direction coinciding with the plane of said cutting tool means; and displacement means mounted to said panel beneath said work surface and cooperating with said underframe to allow said panel to move in said direction whereby a work piece placed on said work surface is displaced with or on said surface and subjected to identical friction forces on either side of said cutting tool means.
an underframe adapted to be mounted to top of the base of a conventional bench saw from which a top panel has been removed;
a panel slidably mounted to said underframe and having an upper work surface displaying a longitudinal slot; said slot having a width allowing said portion of said cutting tool means to protrude upwardly from said work surface and having a length allowing said table to slide longitudinally in a direction coinciding with the plane of said cutting tool means; and displacement means mounted to said panel beneath said work surface and cooperating with said underframe to allow said panel to move in said direction whereby a work piece placed on said work surface is displaced with or on said surface and subjected to identical friction forces on either side of said cutting tool means.
2. A table assembly as defined in claim 1, wherein said underframe has means for aligning the position of said underframe relative to said base.
3. A table assembly as defined in claim 2, wherein said underframe has means for fixing said frame to said base.
4. A table assembly as defined in claim 1, wherein said displacement means include a pair of opposite guide members extending in said longitudinal direction.
5. A table assembly as defined in claim 4, wherein said underframe includes roller means on opposite sides thereof for sliding displacement on said guide members.
6. A table assembly as defined in claim 5, wherein the roller means on one of said opposite sides of said underframe consist of a pair of rollers contacting diametrically opposite sides of the guide roller on said side of said underframe.
7. A table assembly as defined in claim 6, wherein said roller means on the other of said opposite sides of said underframe consist of an arrangement of three rollers contacting the guide member on the other side of said opposite sides; two of said arrangement of rollers extending obliquely relative to a third roller.
8. A table assembly as defined in claim 1, wherein said cutting tool means consists of a main saw blade and of a scoring saw blade, both blades extending in a same longitudinal plane; said work surface including a removable section in the area of said slot so as to provide access to said main saw blade and said scoring saw blade.
9. A table assembly as defined in claim 1, wherein said slot extends along a major portion of work said surface.
10. A table assembly as defined in claim 1, further comprising a rip-fence mounted to said panel and resting on said surface; said rip-fence including means allowing said rip-fence to be transversally movable over said work surface.
11. A table assembly as defined in claim 1, further comprising an extension plate removably mounted at a rear edge of said panel to receive and support panels having large dimensions after being cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002150186A CA2150186A1 (en) | 1995-05-25 | 1995-05-25 | Table assembly for a conventional bench saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002150186A CA2150186A1 (en) | 1995-05-25 | 1995-05-25 | Table assembly for a conventional bench saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2150186A1 true CA2150186A1 (en) | 1996-11-26 |
Family
ID=4155914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002150186A Abandoned CA2150186A1 (en) | 1995-05-25 | 1995-05-25 | Table assembly for a conventional bench saw |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2150186A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028948A (en) * | 2012-09-21 | 2013-04-10 | 重庆百吉四兴压铸有限公司 | Rotary tool sliding table for double-cylinder tank of diesel engine |
| CN103358360A (en) * | 2013-08-06 | 2013-10-23 | 颜夏根 | Woodworking sawing machine |
| CN103659926A (en) * | 2013-04-18 | 2014-03-26 | 成都天磐科技有限责任公司 | Cutting unit with function of improving compressing effect |
| CN104057500A (en) * | 2014-07-08 | 2014-09-24 | 池上剑 | Novel sliding table saw |
| CN104227757A (en) * | 2014-06-27 | 2014-12-24 | 滨州世旭塑木有限公司 | Large-section plastic-wood cutting machine |
| CN112171325A (en) * | 2020-09-25 | 2021-01-05 | 苏州精锐精密机械有限公司 | Supporting device special for thin-wall parts and workbench applying same |
-
1995
- 1995-05-25 CA CA002150186A patent/CA2150186A1/en not_active Abandoned
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028948A (en) * | 2012-09-21 | 2013-04-10 | 重庆百吉四兴压铸有限公司 | Rotary tool sliding table for double-cylinder tank of diesel engine |
| CN103659926A (en) * | 2013-04-18 | 2014-03-26 | 成都天磐科技有限责任公司 | Cutting unit with function of improving compressing effect |
| CN103358360A (en) * | 2013-08-06 | 2013-10-23 | 颜夏根 | Woodworking sawing machine |
| CN103358360B (en) * | 2013-08-06 | 2015-05-06 | 颜夏根 | Woodworking sawing machine |
| CN104227757A (en) * | 2014-06-27 | 2014-12-24 | 滨州世旭塑木有限公司 | Large-section plastic-wood cutting machine |
| CN104227757B (en) * | 2014-06-27 | 2016-09-07 | 滨州世旭塑木有限公司 | Wood cutting machine is moulded in a kind of heavy in section |
| CN104057500A (en) * | 2014-07-08 | 2014-09-24 | 池上剑 | Novel sliding table saw |
| CN112171325A (en) * | 2020-09-25 | 2021-01-05 | 苏州精锐精密机械有限公司 | Supporting device special for thin-wall parts and workbench applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |