초록 ▼

A circular sawing machine has a multi-directional adjustable laser indication device that includes a body, a support rod disposed rotatably and movably within the body, and a laser lamp fixed on the support rod so as to form a visual indication line on a worktable. An angle-adjusting unit is operabl

A circular sawing machine has a multi-directional adjustable laser indication device that includes a body, a support rod disposed rotatably and movably within the body, and a laser lamp fixed on the support rod so as to form a visual indication line on a worktable. An angle-adjusting unit is operable to rotate the support rod so as to adjust the angle of the laser lamp. A transverse adjusting unit is operable to move the support rod within the body along a transverse direction of the worktable so as to adjust the position of the laser lamp.

대표청구항 ▼

We claim: 1. A circular sawing machine comprising: an elongated worktable having a front end and a rear end; a base post unit disposed on said rear end of said worktable; a cutting unit disposed rotatably on said base post unit and including a saw blade; and an indication device including a body co

We claim: 1. A circular sawing machine comprising: an elongated worktable having a front end and a rear end; a base post unit disposed on said rear end of said worktable; a cutting unit disposed rotatably on said base post unit and including a saw blade; and an indication device including a body connected fixedly to and disposed in front of said base post unit and disposed under said cuffing unit, a laser device including a support rod disposed rotatably and movably within said body and extending along a transverse direction of said worktable, and a laser lamp fixed on said support rod so as to form a visual indication line on said worktable, said indication line being parallel to said saw blade, said support rod being rotatable about a central axis thereof and being movable along said transverse direction of said worktable, an angle-adjusting unit including an adjusting member disposed outwardly of said body and connected to said support rod so as to rotate synchronously with said support rod about said central axis of said support rod, and a locking member for locking said support rod releasably within said body, and a transverse adjusting unit disposed on said body and operable to move said support rod along said transverse direction of said worktable. 2. The circular sawing machine as claimed in claim 1, wherein said body of said indication device includes a housing having a front end opening, and a cover plate connected fixedly to said housing and covering said front end opening in said housing, said cover plate having a rear side surface that is formed with two bearing seats that are arranged along said transverse direction of said worktable and that receive rotatably and movably said support rod thereon. 3. The circular sawing machine as claimed in claim 2, wherein each of said bearing seats includes a horizontal upper clamping plate extending integrally and rearwardly from said cover plate and having a curved slot formed in a bottom surface thereof, and a horizontal lower clamping plate extending integrally and rearwardly from said cover plate at a position under said upper clamping plate and having a curved slot formed in a top surface thereof, each of said slots in said upper and lower clamping plates extending along said transverse direction of said worktable and having two open ends, said support rod extending between said upper and lower clamping plates of each of said bearing seats and engaging said slots in said upper and lower clamping plates of said bearing seats. 4. The circular sawing machine as claimed in claim 3, wherein said indication device further includes a frame sleeved around said upper and lower clamping plates of one of said bearing seats and having a threaded hole, said locking member being configured as a lock bolt that engages said threaded hole in said frame and that presses said upper and lower clamping plates of said one of said bearing seats toward each other so as to clamp said support rod therebetween, thereby locking said support rod within said body. 5. The circular sawing machine as claimed in claim 1, wherein said indication device further includes a cushioning sleeve that is sleeved around said laser lamp in a close fitting manner and that is formed with a front end flange that extends radially and outwardly therefrom, said support rod including a lamp-receiving portion that is formed with a central hole extending along a longitudinal direction of said worktable and that is sleeved around said cushioning sleeve in a close fitting manner, said lamp-receiving portion having a front end surface that abuts against said front end flange of said cushioning sleeve. 6. The circular sawing machine as claimed in claim 5, wherein said indication device further includes a parallelism correcting unit, said laser lamp having an intermediate portion disposed within said lamp-receiving portion of said support rod, and a rear end, said parallelism correcting unit including: a hoop sleeved fixedly on said rear end of said laser lamp and having a radially and outwardly extending lug that is formed with a threaded hole therethrough; and a micro-adjusting bolt having a head connected to said support rod so as to prevent movement of said micro-adjusting bolt relative to said support rod while still permitting rotation of said micro-adjusting bolt relative to said support rod, rotation of said micro-adjusting bolt resulting in change in position of a center of said rear end of said laser lamp within said body of said indication device so as to adjust parallelism of said indication line and said saw blade. 7. The circular sawing machine as claimed in claim 1, wherein said support rod includes a long rod portion that has a non-circular cross-sectioned outer end which projects outwardly from said body of said indication device, said adjusting member being configured as an externally splined knob that has an end surface that is formed with a hole which engages fittingly said outer end of said long rod portion of said support rod so as to prevent relative rotation therebetween. 8. The circular sawing machine as claimed in claim 1, wherein said support rod of said laser device has an end surface, said transverse adjusting unit of said indication device including a nut fixed within said body, an adjustment bolt engaging said nut and abutting against said end surface of said support rod, and a coiled compression spring sleeved on said support rod so as to press said end surface of said support rod against said adjustment bolt, rotation of said adjustment bolt resulting in movement of said support rod along said transverse direction of said worktable. 9. The circular sawing machine as claimed in claim 8, wherein said body of said indication device includes a vertical wall that has a front end which is formed with an open-ended slot therethrough, said adjustment bolt extending through said slot in said vertical wall, said vertical nil further having an inner surface that is formed with an L-shaped supporting plate which extends therefrom at a position immediately under said slot in said vertical wall, said nut being disposed between said vertical wall and said L-shape supporting plate such that movement of said nut within said body along said transverse direction of said worktable is prevented.