Cutting – With product handling means – By fluid current
Reexamination Certificate
2002-07-09
2004-04-20
Ashley, Boyer D. (Department: 3724)
Cutting
With product handling means
By fluid current
C083S167000, C083S168000, C083S662000, C083S758000, C083S784000, C144S252100
Reexamination Certificate
active
06722239
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority of Taiwan patent Application No. 091206678, filed on May 10, 2002.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a scroll sawing machine, more particularly to a scroll sawing machine with a sawdust collecting mechanism in which a drive shaft is coupled to and is driven by a motor thereof.
2. Description of the Related Art
Referring to
FIGS. 1
to
3
, a conventional scroll sawing machine
10
is shown to include a machine base
11
, a table
17
, a hollow blade-holding arm
12
, a saw blade
166
, and a blade driving device.
The blade-holding arm
12
includes an interconnecting portion
121
secured on a rear end
111
of the machine base
11
, and upper and lower arm portions
122
,
123
extending in a longitudinal direction of the machine base
11
. A pivot seat
113
is mounted on a front end
112
of the machine base
11
such that the table
17
is pivotally mounted on the pivot seat
113
. An angle-adjusting member
18
is disposed to adjust an angle of the table
17
relative to the machine base
11
.
The blade driving device
13
includes upper and lower swing arms
141
,
142
mounted respectively in the upper and lower arm portions
122
,
123
and coupling respectively upper and lower ends of the saw blade
166
, a connecting shaft
143
pivoted to the upper and lower swing arms
141
,
142
, a motor
131
mounted to a motor seat
132
, and a pulley-and-belt transmission unit
15
disposed to couple the motor
131
to the connecting shaft
143
. During sawing operation, the saw blade
166
is driven via the motor
131
to reciprocate in an upright direction through a hole
171
in the table
17
so as to saw a workpiece on the table
17
. Since a large amount of sawdust is formed and the sawdust will scatter during the sawing operation, collecting means is needed to collect the sawdust.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a scroll sawing machine which has a sawdust collecting mechanism to collect sawdust during a sawing operation.
According to this invention, the scroll sawing machine includes a machine base, and a table which is disposed above the machine base for placement of a workpiece to be sawn thereon. The table has a hole which extends therethrough in an upright direction. A motor is disposed under the table, and has first and second output shafts which are disposed opposite to each other in a longitudinal direction transverse to the upright direction to deliver driving forces. A saw blade extends through the hole, and has upper and lower ends opposite to each other in the upright direction. A blade-driving member includes upper and lower driving portions which are mounted respectively above and under the table and which respectively couple the upper and lower ends to the first output shaft such that, by virtue of the driving force of the first output shaft, the saw blade is put into a reciprocating motion in the upright direction.
A first sawdust collecting member confining a first sawdust passageway. The first sawdust passageway has a first intake port which is disposed above the table and in the vicinity of the hole to collect sawdust scattering around and above the table, and a first outlet port which is disposed under the table and downstream of the first intake port. A second sawdust collecting member is disposed under the table and confines a second sawdust passageway. The second sawdust passageway has a second intake port which is disposed under the table and in the vicinity of the hole to collect sawdust falling through the hole, and a second outlet port which is disposed downstream of the second intake port and adjacent to the first outlet port.
A blower casing has proximate and distal walls which are respectively proximate to and distal from the second outlet port and which are disposed opposite to each other in the longitudinal direction to confine an accommodation chamber, and a discharge port which is disposed between the proximate and distal walls and which is in communication with the accommodation chamber. The proximate wall has an inlet port which is formed therethrough and which is disposed downstream of the first and second outlet ports. A drive shaft extends in the longitudinal direction, and has a first end which is rotatably mounted on the distal wall, and a second end which extends from the first end and outwardly of the distal wall and which is coupled to and which is driven by the second output shaft. An impeller is received in the accommodation chamber, and is connected to and is driven by the first end of the drive shaft to rotate so as to draw the sawdust from the first and second sawdust collecting members into the accommodation chamber for discharge via the discharge port.
REFERENCES:
patent: 2579955 (1951-12-01), Orescan
patent: 4367665 (1983-01-01), Terpstra et al.
patent: 5235890 (1993-08-01), Mathre
patent: 5445056 (1995-08-01), Folci
patent: 5884544 (1999-03-01), Theising et al.
patent: 6293321 (2001-09-01), Chiang
patent: 6470778 (2002-10-01), Kaye et al.
Ashley Boyer D.
Ladas & Parry
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