Woodworking – Work guide – Work urged laterally
Reexamination Certificate
2001-08-09
2002-10-22
Bray, W. Donald (Department: 3725)
Woodworking
Work guide
Work urged laterally
C144S114100, C144S253500
Reexamination Certificate
active
06467516
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority of Taiwan patent Application No. 90210408, filed on Jun. 20, 2001.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a wood planing machine, more particularly to a wood planing machine with an inclining unit for adjusting inclination of a workpiece guiding support.
2. Description of the Related art
FIGS. 1
to
4
illustrate a conventional wood planing machine
10
which includes a stand
11
, a base
12
mounted on the stand
11
, a rotary cutter
13
mounted in the base
12
, horizontally extending left and right plates
14
,
15
which are mounted on the base
12
and which define a work table for receiving a wooden workpiece thereon, a workpiece guiding support
16
projecting upwardly and inclinable relative to the work table, and an inclining unit
20
for adjusting inclination of the workpiece guiding support
16
. The inclining unit
20
includes a guiding seat
21
that is secured to a rear side of the right plate
15
and that is formed with a lateral first groove
211
and a lateral slot
212
, a first sliding member
22
that is mounted slidably on the guiding seat
21
and that has a lateral plate
222
and an upright plate
221
with a vertical groove
2211
at one side thereof and a vertical slot
2212
aligned with and in spatial communication with the vertical groove
2211
, a second sliding member
24
mounted on the upright plate
221
, slidable along the vertical groove
2211
and having a concave face
241
, and a third sliding member
23
secured to a rear side of the workpiece guiding support
16
and having a convex face
231
that conforms to and that is slidable on the concave face
241
. A curved slot
232
is formed in the convex face
231
. The lateral plate
222
has a bottom side that is formed with a second groove
2221
vertically aligned with the first groove
211
, and a rear side that is formed with a retaining hole
2222
. An elongated guide piece
27
is received in the first and second grooves
211
,
2221
, and is fixed on the guiding seat
21
so as to permit the first sliding member
22
to be slidable on the guiding seat
21
. A first tightening unit includes a screw rod
252
extending through the lateral slot
212
in the guiding seat
21
, a first nut member
253
disposed underneath the guiding seat
21
and threadedly engaging the screw rod
252
so as to tighten the first sliding member
22
relative to the guiding seat
21
, an eccentric lever
251
extending through a head of the screw rod
252
and into the retaining hole
2222
in the lateral plate
22
and turnable for fastening and loosening the first sliding member
22
on the guiding seat
21
, and a handle
254
associated with the eccentric lever
2521
for turning the latter. A second tightening unit includes a second nut member
263
disposed at and capable of abutting against the other side of the upright plate
221
, and a threaded rod
252
threadedly engaging the second nut member
263
and extending through the second nut member
263
, the vertical slot
2212
, the vertical groove
2211
, the second sliding member
24
, and the curved slot
232
in the convex face
232
to connect with an anchored member
261
which spans the curved slot
232
. A handle
264
is connected to the second screw rod
262
for driving the second nut member
263
toward the upright plate
221
SO as to fasten the second sliding member
24
to the third sliding member
23
, and away from the upright plate
221
SO as to loosen the second sliding member
24
from the third sliding member
23
.
The wood planing machine
10
is disadvantageous in that the sliding movement of the first sliding member
22
on the guiding seat
21
is not smooth since it relies only on a single rail, i.e. the guide piece
27
.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a wood planing machine that is capable of overcoming the disadvantage described above.
Accordingly, a wood planing machine of this invention comprises: a main support having a laterally extending work table that has front and rear sides; a rotary cutter mounted on the main support and disposed underneath the work table; a workpiece guiding support projecting upwardly from the rear side of the work table and inclinable relative to the work table; an inclining unit including a guiding seat that is secured to and that projects laterally and rearwardly from the rear side of the work table, a first sliding member that has a lateral plate which is slidable on the guiding seat in a first lateral direction toward and away from the workpiece guiding support, and an upright plate which projects uprightly from the lateral plate and which is formed with a vertical groove at one side thereof and a vertical slot aligned with and in spatial communication with the vertical groove, the lateral plate having a bottom that is formed with parallel wedge-shaped first and second grooves which extend in the first lateral direction, the guiding seat being formed with a lateral slot and a lateral guide rail that has a first wedge-shaped end which is capable of wedging into the first groove, a second sliding member that is mounted and that is slidable on the upright plate along the vertical groove, and that has a concave face, and a third sliding member that is secured to and that projects from the workpiece guiding support, and that has a convex face which conforms to and which is slidable on the concave face so as to permit the workpiece guiding support to be inclinable relative to the work table, the third sliding member being formed with a curved slot at the convex face; a first tightening unit including a fastening plate that extends through the lateral slot, that has a second wedge-shaped end, and that is movable in a second lateral direction transverse to the first lateral direction between a locked position, in which, the first and second wedge-shaped ends wedge into the first and second grooves to abut frictionally against the first sliding member so as to prevent the first sliding member from sliding on the guiding seat, and an unlocked position, in which, the second wedge-shaped end moves away from the second groove so as to disengage the first and second wedge-shaped ends from the first and second grooves and so as to cooperate with the first wedge-shaped end to form a guide rail that permits the first sliding member to be slidable thereon, the first tightening unit further including a first screw rod that is mounted on the guiding seat and that threadedly engages the fastening plate so as to move the fastening plate between the locked and unlocked positions; and a second tightening unit including a nut member that is disposed at the other side of the upright plate, an anchored member that is disposed at one side of the third sliding member opposite to the second sliding member and that spans the curved slot, and a second screw rod that threadedly engages the nut member, that extends through the nut member, the vertical slot, the vertical groove, the second sliding member, and the curved slot to connect with the anchored member, and that is turnable so as to drive the nut member toward the upright plate to tighten the second and third sliding members relative to the upright plate.
REFERENCES:
patent: 5533557 (1996-07-01), Jedlicka et al.
patent: 6026870 (2000-02-01), Liu
patent: 6250349 (2001-06-01), Crofutt
Bray W. Donald
Trop Pruner & Hu P.C.
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