| 摘要 |
<p>A support bracket for use in supporting overhead cables in mines comprising a post (1) having a first end (11) and a second end (12) with means (2) whereby it can be secured to a support. The second end (12) has limbs (15, 16) extending from either side of the second end (12) which constitute support arms (4) of the bracket to support a cable or hose (5). The support arms (4) being movable from a cable support position to a cable release position when the cable (5) is subjected to a load in excess of a predetermined level and to return said arms (4) to a cable support position when said excess load has been removed. In a modification the support bracket is formed of a 'J' shaped member having a long limb (27) and short limb (28) connected by a cross member (29). The long limb (27) having a hook member (37) pivotally secured to the free end of the long limb (27), a horizontal roller (41) being rotatably supported between the long limb (27) and the short limb (28) and a truncated cone shaped roller (45) being supported from the free end of the short limb (28). The bracket being movable from a cable support position to a cable release position when the cable is subjected to a load in excess of a predetermined level and to return the bracket to a cable support position when the excess load is removed.</p> |
