SU114097A1 - Multi-span cable crane for lifting and transporting timber in development and for other works - Google Patents

Description

Multi-span cable cranes, in which a cargo trolley with a safety device to prevent the trolley from dropping from a suspension cable, is moving along a fixed carrier cable using a single-sided cable that simultaneously performs the lifting function.

The safety device in such carriages opens upon entering them onto the intermediate support bag and closes after descending from the shoe. The end of the lifting cable is attached to the load hook.

The safety devices of trolleys of well-known cable cranes work reliably only at relatively low trolley speeds. With an increase in the speeds of the trolley, the lever apparatus of its safety device with strong shocks on the support shoe collapses, and the trolley falls off the carrying cable.

The proposed cable crane does not have this drawback. The essence of the invention lies in the fact that the safety device is made in the form of two trolleys mounted on the cheeks below the carrying cable of two opposed, spring-loaded stops, which are moved apart when passing through the support shoe. The saddle of the latter for reducing the required expansion of the stops when the cart passes the shoe is made in the form of a thin vertical sheet with edges beveled along the edges. A wedge clamp is designed to secure the end of the go-lift cable in the hook frame.

FIG. 1 shows a schematic side view of the trolley; in fig. 2 is a section along AA in FIG. one; in fig. 3vid support shoe side; in fig. 4-view it from the butt; in fig. 5 - cargo hook with a partial cut.

The crane includes a drive (winch), trolley, stopper, support shoes, carrier and pull cables, as well as ancillary equipment.

The frame of the trolley is formed by two parallel and spaced bolts and spacers, sheets (cheeks) /. Between these sheets are fixed all the main parts of the trolley, which moves along the carrying cable 2 on four rollers 3 mounted on two suspensions 4, two rollers on each. Each suspension is connected to the bogie frame by a bolt, which is the axis of the suspension. The axles of the rollers in the sheets (cheeks) of the trolley frame are made with radial slots (not shown), which allows the suspensions to swing on the axles and relieve blows when passing the carriage through the support shoes. The rollers are mounted on ballons. On both cheeks of the cart, below the carrying cable, spring-loaded supports 5 are located opposite each other, designed to prevent the cart from falling down from the carrying cable. On the trolley for hauling cable 6, cargo 7 and guide 8 rollers are mounted. The ends of the stops in the place of their joint are provided with inclined cuts, facilitating the pushing of the stops when the trolley passes through the supporting bashmak (Fig. 3, 4). The latter is formed by a suspension 9 with a roller 10 at one end and a saddle // at the other. The saddle is made in the form of a thin vertical sheet with the edges folded along the edges. In order to protect the carrying cable from falling out of the main train, from above the saddle, the cable is secured with a safety bracket 12 on the top of the saddle. The stops are moved apart by the saddle of the supporting base.

- The cargo hook 13 consists of a skeleton 14, a hollow bolt 15 with a tapered head 16, a plate 17, a horn 18, hingedly connected to the skeleton, and a bracket 19, which keeps the horn from an arbitrary rotation. The pull cable 6 passes through the hollow bolt, and its end is secured with a wedge clamp 20 directly into the hook frame 14.

The provision of a safety device to prevent the carriage from falling down from the carrier rope in the form of spring-loaded stops with cross-ends ensures a reduction of shock loads on the safety device when the trolley passes through the supporting bagmak. This is facilitated by the performance of the saddle of the latter in the form of a thin vertical sheet. Fixing the end of the haul rope directly to the load hook frame allows the crane to maintain a constant distance between the plate and the lower edge of the tapered head during the operation of the crane, which is adjusted before the start of the trolley.

The proposed multi-span cable crane allows reliable operation at high trolley speeds.

Subject invention

Claims (4)

1. Multi-span cable trap mainly for lifting and transporting timber to forestry operations with a one-sided rope cable, also suitable for lifting cargo, and a cargo trolley equipped with a safety device to prevent it from falling off the supporting cable, which is designed to reduce shock loads on the safety device when the trolley passes at an increased speed through the supporting bashmak, the safety device is designed as a truck installed on both cheeks and two below the carrying cable, raspolozhenpyh against each other, the spring-loaded stops. 2. The form of execution of the crane according to claim 1, characterized in that, in order to ensure the smooth extension of the stops by the saddle of the shoulder, the ends of the stops are provided with inclined cuts. 3. The form of the crane according to claim 1, characterized in that. in order to reduce the amount of expansion of the stops when they pass the support shoe, it interacts with its stops, the saddle of the latter is made in the form of a thin vertical sheet with edges beveled along the edges. -№ 114097 4. Multi-span cable crane for PP. 1-3, characterized in that, in order to ensure that, during the operation of the crane, the distance between the plate and the lower part of the tapered head is unchanged, the end of the rope is fixed in the skeleton of the hook with a wedge clamp. 05 with t n sixteen