Patent Application
20050217444
The present invention relates to a device for conveniently positioning a workpiece at different angles and clamping the workpiece firmly and quickly.
A conventional guide device for positioning the workpiece at different angles generally includes three blocks protruding on two sides of the device. Two of the three blocks at each of the two sides respectively include two respective inclined grooves at 30 degrees and 45 degrees. The two respective grooves of the two groups of the blocks are located correspondingly. A main groove is defined in the center portion of the device and oriented to be perpendicular to the surface for positioning the workpiece such that a blade of a tool is inserted in the main groove to cut the workpiece. The device is fixed to the worktable by bolts extending through the worktable and fixed to an underside of the device. It is noted that the workpiece is simply positioned by a clamping member and tends to slide during being cut. The blade is damaged if the grooves are too narrow to restrict the movement of the blade. The blade is bent and shakes if the groove are too wide, and it takes a lot of time to put the blade in the grooves. Besides, there are recessed areas in the device and wider than that of the clamping member which could spins into the recessed areas.
The present invention intends to provide a guide and clamp device that includes several guide surfaces and a clamping device which can clamp the workpiece within a short period of time.
The present invention relates to a guide and clamp device for positioning a workpiece and comprises a base board having two guide boards between which a support area is defined such that the workpiece is put on the support area. Each guide boards includes a first guide surface, a second guide surface and a third guide surface relative to a longitudinal axis of the support area. A blade groove is defined through the two guide boards and oriented to be perpendicular to a longitudinal axis of the support area for a tool blade inserted therein. The clamp device is connected to the base board and uses a pawl to quickly position a pressing member which presses the workpiece.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
Referring to FIGS. 1 to 4, the guide and clamp device of the present invention comprises a base board 10 which is fixed to a work table 40 and two guide boards are located on the base board 10 so as to define a support area 111 between the guide boards. Each guide board includes a first guide surface 13, a second guide surface 14 and a third guide surface 15 relative to a longitudinal axis of the support area 11 such that a workpiece 30 as shown in
A clamping device 20 includes a U-shaped frame 21 which has one section thereof engaged with one of two recesses 16 defined in an outside of the two guide boards, a positioning disk 22 connected to a first end of the U-shaped frame 21 so as to contact an underside of the base board 11 and a cylindrical tube 23 connected to a second end of the U-shaped frame 21. The two recesses 16 are located at different sides relative to the support area 11 so that the clamping device 20 can be adjusted its positions to position the workpiece 30 as desired. A pressing member 27 has first threads 271 defined in an outer periphery thereof and movably extends through a through hole 24 defined in the cylindrical tube 23. The through hole 24 includes a smooth inner surface and an inner diameter of the through hole 24 is larger than an outer diameter of the pressing member 27 so that the pressing member 27 can be quickly moved through the through hole 24.
A side hole 25 is defined through the cylindrical tube 23 and communicates with the through hole 24. A pawl 26 is pivotably engaged with the side hole 25 and includes second threads 261 which are engaged with the first threads 271 when the pawl 26 is pivoted to its lock position 251 as shown in
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
