SU82113A1 - Multi-jaw grapple - Google Patents

Description

Multi-maxillary grabs are known, consisting of a lower and an upper traverse, to which the jaws and grabs of the grapple are attached. To use such grabs you need a two-drum winch.

In the described design of the grab, an additional (middle) traverse connected with a top hoist and a hook with lower crossbars is applied to the top hook, which is hung on a crane hook, which makes the grab suitable for use with a single drum winch.

FIG. 1 and 1a are depicted in two projections of a general view of the grapple; in fig. 2a, 26, 2b, 2d - position of the jaws: grab in different periods of the cycle; pas figs. 3 is a diagram of a tackle grapple.

The jaws 1 of the grapple (Fig. 1 and 2) are hingedly suspended to the lower traverse 2 and are connected with the upper traverse 4 by means of the t 3.

Between the lower and upper traverses there is a middle traverse 5, carrying the blocks 6 and connected with the help of a fixed block 7 of the upper traverse, which forms the polyspast 10 of the rope 8, with the yoke 9 being visited on the crane hook.

A rod // is fastened on the lower traverse 2, on which the buffer spring 12 is worn. The traverse 5 moves the middle traverse 5, ending with a cylindrical-conical disk 13, which interact when lowering the hook M in the lower traverse.

The center of gravity of the hooks 14 is located behind the contour formed by the hinges of their attachment to the lower traverse, which is why they tend to disengage the traverse 4 from the disc. To keep them in a closed state, the supporting, loaded with counterweights, levers 15 are strengthened in the jaw.

The scooping cycle of the material proceeds as follows (Fig. 2).

The grab is attached to the hook 9 on the crane hook. The hook M is disengaged with the disk 13, the jaws 1 are opened, the lower yoke 2 is lowered (Fig. 2a.)

No. 82113-2B of this kind, the grapple is lowered and placed on the material. The collar 9 continues to fall until the disk 13 is hooked onto the hook 14 (Fig. 26). After that, the clamp 9 is lifted, and the material is scooped beforehand, and only after the jaws are fully closed, the whole grab is lifted (Fig. 2c).

To unload the grab, it should be lowered to the place of unloading and the rope 8 loosened. The hook M will then automatically fold back (Fig. 2d) and, when lifting the middle crosspiece, the jaws open.

Subject invention

Claims (4)

1. A maxillary grab, consisting of lower and upper travers, to which the jaws and grab grabs are attached, characterized in that, in order to use it in cranes with a single-drum winch, the grapple is equipped with a cylindrical-conical disk mounted on the hook. , the middle traverse, and the lower traverse of the grapple are provided with hinged hooks interacting with the disk that are hinged together in it. 2. Grapper pop. 1, characterized in that the center of gravity of the swivel hooks is located behind the contour formed by the hinges of their attachment to the lower crosshead, which means that they tend to disengage from the disc of the middle crosshead and are kept in a closed state, fixed on the jaw with loaded counterweight levers. 3. The form of making the grab under item 1, characterized in that, in order to increase the closing force of the grapple, the middle traverse is connected to the crane hook by means of a chain hoist, the fixed blocks of which are fixed to the upper traverse. 4. The form of making the grab under item 1, characterized in that, in order to protect the parts of the grapple from shocks when the hooks with the disc are opened, the lower traverse is equipped with a rod passing through the hole in the center of the middle beam and in its extreme position resting on it head through the spring. FIG. P