JP2007284194A5 - - Google Patents

Claims (3)

An outer boom tip structure in a telescopic boom in which the inner boom is telescopically inserted into the outer boom,
A slide plate that is disposed on the inner surface of the outer boom tip portion and that slidably supports the inner boom; a tip reinforcement collar that is secured by surrounding an outer boom basic component of the outer boom tip portion; and an outer boom tip of the tip reinforcement collar A presser plate that is detachably attached to the side surface, and a protrusion to the inner boom side prevents the slide plate from coming out in the distal direction of the telescopic boom. The presser plate mounting surface of the tip reinforcing collar The outer boom tip portion structure in the telescopic boom, characterized in that is positioned on the outer boom tip side with respect to the tip side end surface of the outer boom basic constituent member. An outer boom tip structure in a telescopic boom in which the inner boom is telescopically inserted into the outer boom,
A slide plate that is disposed on the inner surface of the outer boom tip portion and that slidably supports the inner boom; a tip reinforcement collar that is secured by surrounding an outer boom basic component of the outer boom tip portion; and an outer boom tip of the tip reinforcement collar A presser plate that is detachably attached to the side surface, and that has a projecting part toward the inner boom side that prevents the slide plate from coming out in the distal end direction of the telescopic boom. The presser plate is a slide plate of the projecting part . The outer boom tip portion structure in the telescopic boom, wherein the presser surface is formed in a step so as to be on the outer boom tip side with respect to the mounting surface to the tip reinforcing collar and on the outer boom tip side with respect to the outer boom basic component. . The telescopic boom is a tubular outer boom having a substantially U-shaped lower shape, and an inner boom having a similar lower shape is telescopically inserted, and the slide plate has a tip end face on the outer side. 2. A plurality of rectangular parallelepiped strip-like slide plate units that are substantially aligned with the tip end face of the boom and that are continuously disposed in the inner circumferential direction of the outer boom with the respective side edges in the width direction being close to each other. Or the outer-boom tip part structure in the telescopic boom described in Claim 2.