U.S. patent application number 09/850168 was filed with the patent office on 2002-11-14 for worktable of workpiece processing machine.
Invention is credited to Huang, Peter.
Application Number | 20020166432 09/850168 |
Document ID | / |
Family ID | 25307424 |
Filed Date | 2002-11-14 |
United States Patent
Application |
20020166432 |
Kind Code |
A1 |
Huang, Peter |
November 14, 2002 |
WORKTABLE OF WORKPIECE PROCESSING MACHINE
Abstract
A worktable of a workpiece finishing machine comprises a first
worktable and a second worktable. The first worktable has a first
joining portion. The second worktable has a second joining portion
which is joined with the first joining portion to enable the second
worktable to slide back and forth along a predetermined direction
provided by the first joining portion, thereby resulting in a
change in the area formed between the first worktable and the
second worktable for placing a workpiece to be finished by the
workpiece finishing machine. The worktable further comprises a
locating device formed of an arresting member with a first friction
portion, and an actuating mechanism which is mounted on the second
worktable and is connected with the arresting member. The arresting
member is actuated to move back and forth between a first position
and a second position, so as to enable the arresting member to
press against the first worktable to attain the effect of locating
the second worktable.
Inventors: |
Huang, Peter; (Taichung,
TW) |
Correspondence
Address: |
BROWDY AND NEIMARK, P.L.L.C.
624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
|
Family ID: |
25307424 |
Appl. No.: |
09/850168 |
Filed: |
May 8, 2001 |
Current U.S.
Class: |
83/467.1 ;
83/859; 83/953 |
Current CPC
Class: |
Y10T 83/7593 20150401;
B27B 27/02 20130101; Y10T 83/727 20150401; Y10T 83/773 20150401;
Y10T 83/95 20150401; B23D 47/025 20130101; Y10T 83/7647
20150401 |
Class at
Publication: |
83/467.1 ;
83/859; 83/953 |
International
Class: |
B26D 007/01 |
Claims
What is claimed is:
1. A worktable of a workpiece processing machine, comprising: a
first worktable having at least one first joining portion; a second
worktable having at least one second joining portion which is
joined with said first joining portion such that said second
joining portion slides back and forth along a predetermined
direction provided by said first joining portion, thereby enabling
said second worktable to move in the direction toward or away from
said second worktable; wherein said worktable further comprises at
least one locating device comprising an arresting member having a
first friction portion, an actuating mechanism disposed on said
second worktable and connected with said arresting member to
actuate said arresting member to move back and forth between a
first position and a second position; wherein said first worktable
further has at least a second friction portion; wherein said second
worktable further has at least one urging portion which urges said
arresting member to move aside at the time when said arresting
member moves from said first position to said second position,
thereby enabling said first friction portion to press against said
second friction surface, said second friction portion capable of
pressing against said first friction surface at such time when said
arresting member has arrived at said second position, thereby
locating said second worktable.
2. The worktable as defined in claim 1, wherein said first
worktable has two first joining portions; wherein said second
worktable has two first joining portions.
3. The worktable as defined in claim 2, wherein said first
worktable is formed of three unit plate bodies made of aluminum by
extrusion, and two first side bars fastened to two sides of said
three unit plate bodies by means of a plurality of screws and nuts,
each of said first side bars being provided in the underside with a
first joining rail of a predetermined length and extending along
the axial direction of said side bar, thereby forming a first
joining portion of said first worktable; wherein said second
worktable is formed of a unit plate body made of aluminum by
extrusion, two second side bars, and two joining members, said two
second side bars being fastened to two sides of said unit plate
body by means of a plurality of screws and nuts, said two second
side bars being provided in the underside with a second joining
rail extending along the axial direction of said side bar; wherein
each of said joining members is provided with a slide slot which is
fitted with said second joining rail of said two side bars, said
slide slot being provided therein with two shaft sleeves which are
located under said second joining rails and are fastened in said
slide slot from the bottom of said joining member by means of two
blots, so as to urge said shaft sleeve to press against said second
joining rail located thereover, said two second side bars being
therefore joined with said two joining members, thereby enabling
said slide slots of said two joining members to form second joining
portion of said second worktable; wherein said second worktable is
joined with said first worktable such that said slide slot of said
joining member thereof is joined with said first joining rail of
said first side bar of said first worktable, and that said second
worktable is capable of sliding along said first joining rail to
move toward or away from said first worktable.
4. The worktable as defined in claim 3, wherein said first
worktable has two second friction portions, with each being a
friction surface formed along said first joining portion of the
underside of said first joining rail, thereby forming a second
friction portion of said first worktable; wherein said second
worktable has two urging portions, which are formed by two inclined
planes of the top of an urging block of the bottom of said slide
slot, with said two inclined planes being similar in inclination
and inclination direction to each other; wherein said worktable of
the processing machine has two locating devices, with arresting
member of each said locating device being disposed on said two
urging blocks and being provided in the bottom with two reverse
inclined planes opposite in inclination direction to said inclined
planes of said urging block, said reverse inclined planes being
attached to said inclined planes, thereby forming the first
position of said arresting member; wherein the top of said
arresting member is separated from said first joining rail bottom
of said slide slot by a predetermined distance, with said top
forming two friction surfaces capable of cooperating and contacting
said first friction portion, thereby forming the second friction
portion of said arresting member; wherein each of said actuating
mechanisms actuates said arresting member to move to said second
position such that said reverse inclined planes of the bottom of
said arresting member and said inclined planes of the top of said
urging block bring about a differential, so as to cause said
arresting member to rise to enable the friction surface of the top
of said urging block to press against the friction surface of the
bottom of said first joining rail.
5. The worktable as defined in claim 4, wherein said two actuating
mechanisms are formed of an application rod, a linking rod, and a
driven rod, said application rod being pivoted to an inner side of
said second side bar, said driven rod being located in said slide
slot such that said driven rod is put through said shaft sleeve,
and that one end of said driven rod is connected with said
arresting member; wherein said linking rod is pivoted at both ends
with said application rod and one end of said driven rod, said
linking rod forming with said application rod an angle smaller than
180 degrees, said application rod being exerted on by an external
force to swivel upward so as to cause said driven rod to be pulled
outwards from said slide slot by said linking rod, thereby
actuating said arresting member to move toward said second
position.
6. The worktable as defined in claim 5, wherein said two locating
devices are joined at both ends with said application rods by a
joining rod, said two application rods capable of being actuated at
the same time by an external force exerting on said joining rod.
Description
FIELD OF THE INVENTION
[0001] The present invention relates generally to a workpiece
processing machine, and more particularly to a worktable of the
workpiece processing machine.
BACKGROUND OF THE INVENTION
[0002] The ordinary workpiece processing machine, such as a
circular saw or woodworking machine, has a worktable serving as a
platform for placing a workpiece to be processed and for acting as
a basis for moving the workpiece. In theory, a worktable with a
greater area for placing the workpiece is good for the workpiece to
be processed in various fashions. However, an excessively large
worktable is sure to give an added volume and an additional weight
to the workpiece processing machine, thereby resulting in an
increase in cost of transportation of the workpiece processing
machine.
[0003] The German Utility Pat. No. 2980112711 discloses a circular
saw comprising a main worktable, and two auxiliary worktables which
are provided in two sides thereof with a round rod that is received
in one of two long through holes of the main worktable, thereby
enabling each auxiliary worktable to be pulled to slide along the
axial direction of the round rod so as to adjust the size of the
workpiece placing area which is formed together by the main
worktable and the two auxiliary worktables. The volume of the
entire worktable can be made smaller by joining the auxiliary
worktables with the sides of the main worktable. The space that is
taken up by the circular saw can be thus minimized. In addition,
the circular saw can be shipped with a relative ease.
[0004] The locating effect of the auxiliary worktables is attained
by a plurality of wing bolts, which are fastened with the main
worktable such that they can be pressed against the round rods of
the auxiliary worktables. These bolts are apt to become unfastened
by the vibrational motion of the circular saw in operation, thereby
undermining the locating effect of the auxiliary worktables. The
workpiece can not be therefore stabilized on the main worktable and
the auxiliary worktables. In addition, it is inconvenient and
time-consuming for a machine operator to fasten or unfasten the
wing bolts in an effort to locate the two auxiliary worktables.
SUMMARY OF THE INVENTION
[0005] It is therefore the primary objective of the present
invention to provide a workpiece finishing machine with a worktable
which is designed to hold workpieces of various sizes.
[0006] It is another objective of the present invention to provide
a workpiece finishing machine with a worktable which is easy to
use.
[0007] In keeping with the principle of the present invention, the
foregoing objectives of the present invention are attained by a
worktable comprising a first worktable, a second worktable, and a
locating device. The first worktable has a first joining portion.
The second worktable has a second joining portion which is slidably
joined with the first joining portion such that the second joining
portion slides in a reciprocating manner along a predetermined
direction, thereby enabling the second worktable to move toward or
away from the first worktable. The locating device comprises an
arresting member having a first friction portion, and an actuating
mechanism which is mounted on the second worktable and is connected
with the arresting member. The arresting member is actuated to move
back and forth between a first position and a second position such
that the arresting member is located at the second position. The
second worktable has an urging portion, which urges the actuating
member to move aside at the time when the arresting member moves
from the first position to the second position, thereby enabling
the first friction portion to attach to the second friction
portion. As the arresting member arrives at the second position,
the second friction portion presses against the first friction
portion. As a result, the second worktable can not be continuously
moved and is thus located.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 shows a perspective view of a preferred embodiment of
the present invention.
[0009] FIG. 2 shows a partial exploded view of the preferred
embodiment of the present invention.
[0010] FIG. 3 shows a sectional view taken along a line 3-3 as
shown in FIG. 1.
[0011] FIG. 4 shows a sectional view taken along a line 4-4 as
shown in FIG. .
[0012] FIG. 5 shows a schematic view of the preferred embodiment of
the present invention in use.
[0013] FIGS. 6 and 7 show the state of the use of the preferred
embodiment of the present invention along the sectional view taken
along the line 4-4 as shown in FIG. 1.
[0014] FIGS. 8 and 9 show the member state under the state shown in
FIGS. 6 and 7 along the sectional view taken along the line 4-4 as
shown in FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
[0015] As shown in FIGS. 1-4, a worktable 1 of the preferred
embodiment of the present invention comprises the following
component parts.
[0016] A first worktable 10 is formed of three unit plate bodies II
of aluminium by extrusion, and two first side bars 12 which are
fastened to two sides of the unit plate bodies 11 by a plurality of
screws 111 and nuts 112. The first side bars 12 are provided in the
underside with a first joining rail 121 extending along the axial
direction of the first side bar 12, thereby forming the first
joining portion of the first worktable 10. The first joining rail
121 is provided in the underside with two friction surfaces 122
extending along the first joining rail 121, thereby forming the
second friction portion of the first worktable 10.
[0017] A second worktable 20 is formed of one unit plate body 21 of
aluminium by extrusion, two second side bars 22, and two joining
members 23. The two second side bars 22 are connected with two
sides of the unit plate body 21 by a plurality of screws 211 and
nuts 212. Each second side bar 22 is provided in the underside with
the second joining rail 221 extending along the axial direction of
the second side bar 22. The joining member 23 is provided with a
slide slot 231, by which the joining member 23 is fitted on the
second joining rail 221 of the second side bars 22. The slide slot
231 is provided with two shaft sleeves 232, which are located under
the second joining rail 221 and are fastened in the slide slot 231
from the bottom of the joining member 23 by means of two bolts 233,
thereby enabling the shaft sleeve 232 to urge the second joining
member 23. The slide slot 231 of the second joining member 23 forms
the second joining portion of the second worktable 20.
[0018] The second worktable 20 uses the slide slot 231 of its
joining member 23 to join with the first joining rail 121 of the
first side bar of the first worktable 10 such that the second
worktable 20 slides along the first joining rail 121, so as to move
toward or away from the first worktable 10. Each slide slot 231 is
provided in the bottom with an urging block 24 which is provided in
the top with two inclined planes 241 similar in inclination and
inclination direction, thereby forming the urging portion of the
second worktable 20.
[0019] Two locating devices 30 comprise an arresting member 31 and
an actuating mechanism 32. The arresting member 31 is disposed on
the urging block 24 which is located in the slide slot 231. The
arresting member 31 is provided in the bottom with two reverse
inclined planes 311 opposite in direction to the inclined planes
241 of the urging block 24 and in contact with the inclined planes
241. This is the first position where the arresting member 31 is
located. The top of the arresting member 31 is separated from the
bottom of the first joining rail 121 joining with the slide slot
231 by a predetermined distance. The top forms two friction
surfaces 312 capable of contacting the first friction portion,
thereby forming the second friction portion of the arresting member
31. The actuating mechanisms 32 comprise an application rod 321, a
linking rod 322, and a driven rod 323. The application rod 321 is
pivoted to the inner side of the second side bar 22. The driven rod
323 is put through the shaft sleeve 232 to locate in the slide slot
231 such that one end thereof is connected with the arresting
member 31. The linking rod 322 is pivoted at both ends with the
application rod 321 and one end of the driven rod 323, thereby
forming with the application rod 321 an angle smaller than 180
degrees. As the application rod 321 is wrenched to swivel upwards,
the driven rod 323 is pulled outward from the slide slot 231 by
means of the linking rod 322, so as to actuate the arresting member
31 to move likewise. The reverse inclined plane 311 of the
arresting member 31 and the inclined plane 241 of the urging block
24 bring about a differential, thereby causing the arresting
members 31 to rise at the same time such that the friction surface
312 urges the friction surface 122 of the bottom of the first
joining rail 121. This is the second position where the arresting
member 31 is located in the slide slot 231. The two locating
devices 30 depend on a joining rod 40 which is joined at two ends
with the application rods 321. As a user applies the force on the
joining rod 40, the two application rods 321 can be moved
simultaneously.
[0020] As shown in FIG. 5, a circular saw A is provided with the
worktable 1 of the present invention such that the first worktable
10 is fastened with the base of the circular saw A. As shown in
FIGS. 6-8, when a long or greater wood workpiece is processed by
the circular saw A, the second worktable 20 is pulled to move along
the first joining rail 121 of the first worktable 10 to move away
from the first worktable 10, thereby forming a greater area between
the second worktable 20 and the first worktable 10 for placing the
workpiece. The arresting members 31 are located at the first
position.
[0021] When the second worktable 20 is moved to locate at the
appropriate position, the user may wrench the joining rod 40 to
move so as to cause the two application rods 321 to be exerted on
by the force at the same time to swivel upward. Thereafter, the
arresting member 31 is caused by the linking rod 322 and the driven
rod 323 to move from the first position to the second position,
thereby enabling the friction surface 312 of the arresting member
31 to press against the friction surface 122 of the first joining
rail 121 so as to bring about the arresting effect. As a result,
the first worktable 10 and the second worktable 20 are located.
[0022] When the user applies the force on the joining rod 40 to
cause the arresting members 31 to return to the first position, the
first worktable 10 and the second worktable 20 are relieved of the
locating effect. As a result, the second worktable 20 can be pushed
or pulled to change its position, so as to facilitate the
processing of the workpiece of other sizes.
[0023] It is therefore readily apparent that the worktable 1 of the
preferred embodiment of the present invention is suitable for use
in placing the workpieces of various sizes in such a manner that
the workpieces can be processed in a variety of patterns.
[0024] In light of the design of the two locating devices 30, the
second worktable 20 can be located with ease and speed so as to
enhance the usefulness of the first worktable 10. In addition, the
locating effect of the present invention is not affected in any way
by the vibration of the circular saw A in operation, thereby
enabling the workpiece to be placed on the first worktable 10 and
the second worktable 20 with a great deal of stability.
* * * * *