Working bench equipped with cutting rail alignment for electric circular saw

The working bench has a bench face marked with parallel and equally spaced scales as checker. Each intersection point is formed with a through hole for fixing the alignment or the work piece so as to facilitate the cutting operation. The bench face is further formed with a dividing disc and a ruler with metric and British scales. The cutting rail alignment includes an engaging board, a clamp, a rail slat, a rail seat, lifting shafts and a rail seat support rod. The engaging board having a rotary shaft at one end for fitting into a central through hole of the dividing disc for selecting suitable direction. The clamp serves to clamp a free end of the engaging board so as to stably locate the engaging board by the selected direction. The width from the inner side of the saw blade of the circular saw to outer edge of the base of the circular saw is first measured and then the rail slat is fixed on the rail seat by the width. The lifting shafts are fitted into the through holes on one side of the rail seat, so that the rail seat is rotatable to cover and press the work piece. The rail seat support rod serves to clamp a free end of the rail seat.

BACKGROUND OF THE INVENTION 
The present invention relates to a working bench equipped with cutting rail 
alignment for electric circular saw. The working bench has a bench face 
marked with parallel and equally spaced scales and through holes for 
fixing the alignment. The bench face is also formed with a dividing disc 
and a ruler, serving as a DIY working bench. 
In DIY field, carpentry is the most popular work. In carpentry, a working 
bench is inevitable. Carpentry includes cutting, sawing, planing, 
grinding, drilling, nailing, etc. However, it is often difficult for a 
none-professional person to do these works very well. 
SUMMARY OF THE INVENTION 
It is a primary object of the present invention to provide a working bench 
equipped with cutting rail alignment for electric circular saw. The 
electric circular saw can be leaned against a rail of the alignment and 
conveniently operated to quickly and precisely cut off a work pziece with 
any shape by any angle. 
It is a further object of the present invention to provide a working bench 
equipped with cutting rail alignment for electric circular saw. A rail 
slat is adjustably fixed on a rail seat so as to adjustably define the 
width of the rail for different specifications of electric circular saws. 
It is still a further object of the present invention to provide a working 
bench equipped with cutting rail alignment for electric circular saw. The 
lifting shafts are fitted into the through holes on one side of the rail 
seat, serving as a hinge structure, whereby the rail seat is liftable and 
rotatable to cover and press the work piece. The rail seat support rod 
serves to clamp and locate a free end of the rail seat so as to facilitate 
the operation. 
It is still a further object of the present invention to provide a working 
bench equipped with cutting rail alignment for electric circular saw. The 
working bench includes an engaging board which on one hand indicates the 
direction and on the other hand provides stabilizing and locating effect 
for the work piece to be cut. 
According to the above objects, the working bench of the present invention 
has a bench face marked with parallel and equally spaced scales as 
checker. Each intersection point is formed with a through hole for fixing 
the alignment. The bench face is further formed with a dividing disc and a 
ruler with metric and British scales. The cutting rail alignment includes 
an engaging board, a clamp, a rail slat, a rail seat, lifting shafts and a 
rail seat support rod. The engaging board having a rotary shaft at one end 
for fitting into a central through hole of the dividing disc for selecting 
suitable direction. The clamp serves to clamp a free end of the engaging 
board so as to stably locate the engaging board by the selected direction. 
The width from the inner side of the saw blade of the circular saw to 
outer edge of the base of the circular saw is first measured and then the 
rail slat is fixed on the rail seat by the width. The lifting shafts are 
fitted into the through holes on one side of the rail seat, whereby the 
rail seat is rotatable to cover and press the work piece. The free end of 
the rail seat is padded by a pad member having a thickness equal to that 
of the work piece. Then the rail seat support rod is used to clamp a free 
end of the rail seat, whereby the electric circular saw can be leaned 
against the rail and moved forward to precisely and quickly cut off the 
work piece. 
The present invention can be best understood through the following 
description and accompanying drawings, wherein:

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Please refer to FIGS. 1 and 3. The working bench 1 of the present invention 
has a bench face 10 marked with parallel and equally spaced scales 11 as 
checker. Each intersection point is formed with a through hole 12 for 
fixing a working alignment or a work piece. 
Near front edge of the bench face 10 is formed a ruler 13 marked with 
metric and British scales. A first latitudinal scale line opposite to the 
ruler 13 serves as a standard line 14. With a certain through hole a on 
the standard line 14 as a center, a dividing arc 15 of 90 degrees (one 
fourth of a circle ) or 180 degrees (one half of a circle) is marked on 
the bench face. In this embodiment, the dividing arc 15 is of 90 degrees, 
one fourth of a circle. The operation is thus usually based on the central 
through hole a of the dividing arc 15. 
Please refer to FIG. 2. The cutting rail alignment 2 is mounted on the 
working bench 1, including an engaging board 21, a clamp 22, a rail slat 
23, a rail seat 24, a lifting shaft 25 and a rail seat support rod 26. 
The engaging board 21 is an elongated board member having a vertically 
extending rotary shaft 211 at one end. The rotary shaft 211 is fitted into 
the central through hole a of the dividing arc 15. By means of a locating 
mark 212, a suitable direction of the dividing arc 15 is selected to 
rotate the engaging board. 
The clamp 22 has a pressing block 221 and a vertically extending thread rod 
222 for fitting into a through hole of the bench face. A butterfly nut 223 
is used to tighten the thread rod 222 so as to fixedly clamp the engaging 
board 21. 
The rail slat 23 is formed with several thread holes 231 for screwing on 
the rail seat 24. The rail slat 23 has an engaging edge 232 with a certain 
height for engaging with an electric circular saw. 
The rail seat 24 is formed with a pivot hole 241 at one end for a pivot 
shaft 242 to pass therethrough for connecting with the lifting shaft 25. 
The rail seat 24 is formed with slide slots 243 for parallelly slidably 
adjusting the rail slat 23 on the rail seat. The engaging edge 232 of the 
rail slat and the rail seat 24 together define a rail 244. 
The lifting shaft 25 has a pivot hole 251 for the pivot shaft 242 to pass 
therethrough to form a hinge structure connected on one side of the rail 
seat 24. Accordingly, the rail seat 24 can be rotated to cover and press 
the work piece 30. 
The rail seat support rod 26 (as shown in FIG. 7) includes a downward 
extending shaft rod 261 and a support block 262 at upper end. The support 
block 262 is formed with a chuck 263 having a circular inner wall face 
264, whereby the support rod 26 can rotatably clamp and support the end of 
the rail seat 24. 
Please refer to FIGS. 4 to 6. When using the working bench, the rotary 
shaft 211 of the engaging board 21 is fitted into the central through hole 
a of the dividing arc 15. Then the other end of the engaging board 211 is 
swung to align the locating mark 212 with the dividing arc. (The engaging 
board 21 is rotated and located according to the cutting angle as shown in 
FIGS. 4 and 5. Then the end of the engaging board 21 is fixed at a 
suitable through hole by the clamp 22. The thread rod 222 of the clamp 22 
is fitted into a suitable through hole of the bench face 10 and tightened 
by the butterfly nut 223. The engaging board 21 on one hand indicates the 
direction and on the other hand provides stabilizing and locating effect 
for the work piece to be cut. The work piece 30 is placed on the bench 
face 10 and tightly engaged with the engaging board 21. 
First, the width from the inner side of the saw blade 41 of the circular 
saw 40 to outer edge of the base of the circular saw is measured. The 
width is used as the standard distance for fixing the rail slat 23 on the 
rail seat 24. The rail slat 23 is placed on the slide slots 243 and moved 
to the standard distance. Then the rail slat 23 is fixed at the thread 
holes 231 to form the rail 244. 
Then the lifting shafts 25 at the end of the rail seat 24 are respectively 
fitted into the through holes b, c on the first and second scales, whereby 
the rail seat 24 is latitudinally and rotatably positioned. The work piece 
30 is placed on the bench face 24 and pressed by the rail seat 10 
thereunder. A pad member having the same thickness as the work piece is 
placed at free end of the rail seat to keep the rail seat stable. The 
shaft rod 261 of the rail seat support rod 26 is fitted into a through 
hole on lateral side of the rail seat 24 and then the shaft rod 261 is 
rotated to make the chuck 263 snugly clamp the rail seat 24 and prevent 
the rail seat 24 from being deflected. The base 42 of the circular saw 40 
is leaned against the rail 244 of the rail seat 24 and pushed forward so 
as to smoothly and precisely cut off the work piece. By means of the 
previous orientation, the work piece can be cut at any angle. 
According to the above arrangement, the angle of the engaging board can be 
adjusted by means of the dividing disc as necessary. Also, the lifting 
shafts are adjustably fitted in the through holes so that the rail seat 
can be lifted or lowered in accordance with the thickness of the work 
piece. Therefore, the rail seat can be rotated to stably cover and press 
the work piece. This enables an operator to cut the work piece without 
deflection. Moreover, the rail seat support rod serves to clamp the free 
end of the rail seat so as to provide a stabilizing effect for the rail 
seat during cutting operation. 
The parallel and equally spaced scales and through holes enable an operator 
to fixedly locate the cutting rail alignment on the bench face in 
accordance with the size and shape of the work piece. Therefore, the work 
piece can be reliably and tightly clamped at a predetermined angle so as 
to facilitate the cutting operation. 
It should be noted that the above description and accompanying drawings are 
only used to illustrate one embodiment of the present invention, not 
intended to limit the scope thereof. Any modification of the embodiment 
should fall within the scope of the present invention.