Woodworking – Planer – Adjustable work carrier
Reexamination Certificate
2001-07-02
2002-05-07
Bray, W Donald (Department: 3725)
Woodworking
Planer
Adjustable work carrier
C144S117100
Reexamination Certificate
active
06382275
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a wood planing machine, more particularly to a wood planing machine with a bed locking unit which has a simple structure.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional wood planing machine
10
is shown to include a machine body
11
, a workpiece-support bed
13
, a cutter unit
14
, a bed-raising unit
15
, and a bed-locking unit
16
.
As illustrated, the machine body
11
has a pair of spaced apart side walls
12
, each of which is formed with a pair of vertical slots
121
therethrough. The workpiece-support bed
13
is disposed movably in the machine body
11
between the side walls
12
and under the cutter unit
14
. The bed-locking unit
16
secures the bed
13
to the side walls
12
.
The bed-raising unit
15
is associated with the workpiece-support bed
13
for adjusting the height of the bed
13
relative the cutter unit
14
.
The bed-locking unit
16
includes left and right pairs of engaging pieces
161
which are fixed on the left and right portions of the workpiece-support bed
13
, which extend into the slots
121
, and which are formed with screw holes, and left and right pairs of clamping plates
162
which are disposed on outer sides of the side walls
12
and which threadedly engage the screw holes in the engaging pieces
161
. The clamping plates
162
are provided with turning handles
163
.
When a desired height of the workpiece-support bed
13
relative to the cutter unit
14
has been achieved, each of the clamping plates
162
is turned in a clockwise direction, where the clamping plates
162
are forced to abut against the side walls
12
so as to lock the workpiece-support bed
13
relative to the side walls
12
. It is inconvenient and time-consuming to turn the clamping plates
162
one after another.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to provide a wood planing machine which includes a bed-locking unit of a simple construction and which is clear of the aforementioned drawback that results from the use of the conventional wood planing machine.
Accordingly, the wood planing machine of the present invention includes a machine body with opposite side walls, a workpiece-support bed, a bed-raising unit, and a bed locking unit. Each of the side walls has a pair of vertical slots formed therethrough. The workpiece-support bed is disposed between the side walls, and is movable along the slots. The bed-raising unit is mounted on the machine body, and is operably associated with the workpiece-support bed in such a manner that operation of the bed-raising unit results in movement of the workpiece-support bed within the machine body. The bed locking unit includes two horizontally spaced apart and interconnected locking rods, and left and right nut units. The locking rods extend through the workpiece-support bed and the slots in the side walls, and have left and right threaded ends of opposite thread directions. The threaded ends of the locking rods are exposed from the slots in the side walls. The locking rods are axially rotatable. The left and right nut units are disposed outside of the machine body adjacent to the left and right side walls, respectively, and include a pair of internally threaded right nuts which are mounted threadedly on the right threaded ends of the locking rods and disposed non-rotatably on the machine body and which have wall abutting flanges extending outwardly and radially from the right nuts, and a pair of internally threaded left nuts which are mounted threadedly on the left threaded ends of the locking rods and disposed non-rotatably on the machine body and which have wall abutting flanges extending outwardly and radially from the left nuts. Rotation of the locking rods results in axial movement of the left and right nut units toward or away from each other and consequently causes the wall abutting flanges of the left and right nuts to engage or disengage the side walls, thereby locking or unlocking the workpiece-support bed on the side walls of the machine body.
REFERENCES:
patent: 5829498 (1998-11-01), Liao
patent: 6135177 (2000-10-01), Chiang
patent: 6289951 (2001-09-01), Chiang
Chiang Pei-Lieh
Liao Juei-Seng
Bray W Donald
Trop Pruner & Hu P.C.
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