Table saw

• US 5,293,802 A
• Filed: 06/16/1993
• Issued: 03/15/1994
• Est. Priority Date: 08/11/1989
• Status: Expired due to Term

• Current Assignee: One World Technologies (Techtronic Industries Company Limited)
• Original Assignee: Ryobi Limited (Techtronic Industries Company Limited)
• Inventors: Miyamoto, Kouichi, Wada, Tatsuya, Shiotani, Takeshi, Sato, Mitsumasa, Tsugami, Kunio
• Primary Examiner(s): Seidel, Richard K.
• Assistant Examiner(s): Peterson, Kenneth E.
• Application Number:
  US08/077,088
• Time in Patent Office: 272 Days
• Field of Search: 83/468.7, 83/477.2, 83/438, 83/467.1, 269/318, 144/286 R, 144/287
• US Class Current: 83/468.7
• CPC Class Codes: B23D 47/025 of tables
• CPC Class Codes: B27B 27/02 arranged laterally and parallel with respect to the plane of the saw blade
• CPC Class Codes: B27B 5/243 the saw blade being arranged underneath the work-table the circular saw blade arranged underneath a stationary work-table for sawing material in general B23D45/06
• CPC Class Codes: Y10T 83/7647 Adjustable
• CPC Class Codes: Y10T 83/773 Work-support includes passageway for tool [e.g., slotted table]

Abstract

A table saw has a circular saw table, a miter table and a supplementary table to form a working table, on the front and rear sides of which two guide rails are disposed slidably with respect to the working table. The miter table has a miter fence thereon whose pivot points are provided at two separate positions.

Claims

1. A table saw comprising a circular saw for cutting a work, a working table supporting the circular saw, front and rear guide rails disposed laterally on front and rear sides of said working table, respectively, and a lip fence transverse to the front and rear guide rails and movable relative to the circular saw along the front and rear guide rails to determine a cutting length of said work, said lip fence comprising a main body and front and rear guide portions respectively provided at opposite ends of said main body adjacent the front and rear guide rails, said front guide portion having a movable means for laterally and slidably moving said lip fence along said guide rails and a fastening means for fastening said lip fence on said guide rails, said fastening means comprising:

an eccentric cam mounted on a shaft, the eccentric cam having an apex point on an outer periphery of the eccentric cam most radially distant from a rotation center of the shaft;

a handle means secured to the eccentric cam for rotating the eccentric cam;

an operation member formed with a substantially circular hole into which the eccentric cam mounted on the shaft is rotatably engaged; and

a connecting rod extending through the main body of the lip fence and translationally coupled with the rear guide rail by a fixing means for securing the rear guide portion to the rear guide rail;

wherein, said operation member has a back wall with a lower end and an upper end such that the lower end of said operation member back wall abuts against said front guide rail, and the upper end of said operation member back wall abuts against the connecting rod to push against one end of the connecting rod, so that when the handle is operated to rotate the eccentric cam in a first rotational direction toward the lower end of said operation member back wall from an initial position in which the apex point is most apart from the lower end of said operation member back wall, the lower end of the operation member back wall presses against the front guide rail to fasten the lip fence at a predetermined position with respect to the front guide rail, and when the eccentric cam is further rotated in said first rotational direction, the apex point continues to rotate toward the lower end of said operation member back wall, to thereby move the upper end of the operation member back wall obliquely upward in a second rotational direction opposite said first rotational direction to press against the one end of the connecting rod and cause the fixing means to engage the rear guide rail, whereby the lip fence is fastened to the predetermined position relative to the front and rear guide rails.

2. The table saw according to claim 1, wherein a first position of the apex point on the outer periphery of the eccentric cam, relative to the rotation center of the eccentric cam shaft, is located on a side of the eccentric cam opposite from the lower end of the operation member back wall, wherein the handle is operated to rotate the eccentric cam in said first rotational direction to move the apex point toward the lower end of the operation member back wall to a second position where a distance between the rotation center of the eccentric cam shaft and the lower end of the operation member back wall is substantially equal to a distance between the lower end of the operation member back wall and the apex point, the lower end of the operation member back wall being fastened to the front guide rail at the second position, and when the handle is operated to further rotate the apex point in said first rotational direction to a third position, substantially closer to the lower end of the operation member back wall than the second position, the lower end of the operation member back wall remains fastened to the front guide rail while the upper end of the operation member back wall rotates in said second rotational direction and pushes against the connecting rod to operate the fixing means relative to the rear guide rail to fasten the lip fence thereto.

3. The table saw according to claim 2, wherein the fixing means for the rear guide rail comprises a plate disposed in the rear guide portion and rotatable about a pivot axis;

an engaging projection on a portion of the plate to movably engage a recessed portion of the rear guide rail.

4. The table saw according to claim 3, wherein the fixing means for the rear guide rail further comprises an adjusting screw located between the plate and an opposite end of the connecting rod, the position of the adjusting screw relative to the plate being adjustable such that when the fastening means pushes against the one end of the connecting rod, the opposite end of the connecting rod pushes against the adjusting screw to rotate the plate about the pivot axis and press the engaging projection of the plate into the recessed portion of the rear guide rail, the position of the adjusting screw relative to the plate adjusting a timing of the plate rotation about the pivot axis.

5. The table saw according to claim 4, wherein said connecting rod is provided with a spring mounted between a spring engaging flange and an end portion of the main body to urge the connecting rod toward the operation member.