Band-rapture safety arrangement for band sawing machine

• Main Author: DING ZELIN
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2008
• Subjects: BROACHING; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; FILING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PLANING; SAWING; SCRAPING; SHEARING; SLOTTING; TRANSPORTING

The utility model relates to a saw band fracture safety guard for a band sawing machine, comprising a backstand arranged on a saw log, wherein, the backstand is provided with a tension slide block which can slide left and right; the right end of a tension screw mandrel is movably connected with the tension slide block, while the left end of the tension screw mandrel slides to extend out of the backstand and is sleeved with a pressure spring and connected with a handwheel; the tension slide block is provided with a moving plate, the left side of which is correspondingly provided with a microswitch. When a saw band is in normal condition, the moving plate and the microswitch keep a certain distance from each other; if the saw band is broken, the tension slide block drives the moving plate to move to the left to contact the microswitch under the action of the pressure spring, the microswitch sends a signal to cut off the power source of a main motor, thereby protecting the safety of devices and personnel. The ut