SU88600A2 - Cable Crane with Movable Supports Shut Down at End Supports - Google Patents

Description

BASIC Auth. St. No. 53998 describes a cable crane with moving hoisting ropes that are switched off sequentially when they approach the end supports.

In the proposed crane, the clamp of the trap kapat is made in the form of pliers, the gear ratio of which increases as the rope is compressed, thus increasing the grip strength of the clamp; To the lower surfaces of the movable levers, hinge attachment are pawls that freely rise when the support enters the device, turn off the device and abutting on the support rollers during reverse movement. On the supports themselves, the rods that go under the arms of adjacent supports are fixed; the next step can be to grab the wire rope until the front support extends into the span, which prevents an arbitrary release of support from the switching device. the switching device is made lifting and turning about the horizontal axis. the passage is parallel to the crane ropes, which ensures the same turn-on time of support. The supports are made with double the number of road rollers, which allows them to be used in cable cranes with two carrying ropes. Inside the switching device, a spring-loaded frame with rubber buffers is placed, as a result of which the strikes of the supports against its frame and one against the other are softened. FIG. shows a side view of the switching device; in fig. 2 and 3 plan and cross section of this device; in fig. 4 and 5 are front and side support; in fig. 6-support for two-cable cable crane.

Each support consists of a frame L at the bottom of which the rollers 2 are supported with hoisting ropes supported on them -

No. 88600

cable crane; in the upper part, the rollers 4 are mounted, moving along the supporting cable 5. If the crane has two supporting ropes, each support is supplied with two pairs of rollers.

The supports are moved along the support ropes by means of the traction rope 6, to which each of them is attached by a clip. The clamp is made in the form of tongs 7, connected on one side by a hinge 8 located below the pull rope, and on the other side — connected by means of struts. 9 with a spring-loaded thrust W, and the dimensions of the tongs and struts are chosen in such a way that, as the clamping cable draws, the transfer force of the system increases; with a constant force of the spring 11, the magnitude of the force compressing the haul rope also increases.

When approaching the support legs, they are disconnected from the haul rope. To soften the blows of the supports on the frame 12 of the switching device, the latter is fixed on the springs 13 and supplied with shock absorbers 14.

In order to prevent the spontaneous release of supports from the switching device to the line due to random shocks or vibrations of the ropes, pawns - / 6 - are pivotally attached to the moving levers 75, freely rising at the entrance of the support to the switching device and supported by the supporting rollers 17.

In order to prevent several supports (instead of one regular) from each switching off, the rods 18, which go under the levers 19 and the clamps, are fixed on each of them, so that the clamp of any support can be activated only after the rod in front of the support releases the lever 19 i.e. when front support comes on line.

So that the time for joining each support to the traction rope is kept the same, the moving levers (with the release of the support institutes) are lifted up by the electromagnets 22, remaining parallel to each other, which is achieved by rotating them relative to the hinges 20 and 21 located on single axis.

Item: Breasts

Claims (6)

1. Cable with; . , moving supports turned off. end supports on the bus. St. No. 53998, characterized in that, in order to increase the adhesion force of the support with the pull rope; the clamp is made in the form of tongs, the gear ratio of which increases as the rope is compressed. 2. The form of the cable crane on n. 1, characterized in that in order to prevent the spontaneous release of the supports from the switching device to the lower surfaces of the movable levers: the last pawns are pivotally attached, freely lifted up by the support when entering the switching device and abutting on the support rollers during their reverse movement. 3. The form of the cabled crane according to claim 1, characterized in that, in order to prevent several supports from the switching device out of the switch-off device at once, instead of one regular one, on each of them from the side facing the support, the rods that go under the clamps of adjacent supports 4. The form of the cable crane according to claim 1, characterized in that, in order to maintain the duration of the operations of joining each support to the cable, the levers of the switching off (on) device are made up and down with respect to the horizontal axis passing the parallel lines the crane. 5. The form of cable crane butn. I, characterized in that, in order to install :: and supports on two supporting ropes, two bunks of rollers are crimped to their heads but on each side, each of which covers one not: - leading rope. 6. The form of the cable crane but clause 1, which is elicited by the fact that, with the aim of hitting the butts of the supports, one against the other and the frame of the switching device when entering into the earlier one, a frame with rubber buffers is placed at the ends of the switching device. 8a