SU1557069A1 - Grab - Google Patents

Abstract

The invention relates to lifting devices and is intended for the loading and unloading of bulk bulk materials inside industrial premises. The purpose of the invention is to simplify the design. The grab contains two jaws 1, rigid ti 2, lower yoke 3 with axis 4, pivotally connected to jaw 1, upper yoke 5 with two pairs of guide rollers 6 fixed on the inner wall of the upper yoke 5 so that they are in contact with the outer surface of the vertical rod. In order to limit the stroke of the rod 7, stops 8 are installed at its upper end. Loops 9 are also attached to the upper end of the rod to hang the mechanism on the hook of the crane. A grip 10 hinged to the lower end of the bar 7 is made in the form of a hook, inside which a bar 11 is hinged in the recess. The swing of the hook stroke is limited by a leaf spring 12 fixed on the lower end of the bar 7. 1 Cp f-ly, 1 ill.

Description

The invention relates to lifting devices and is intended for loading and unloading bulk bulk materials within the production premises.

The purpose of the invention is to simplify the design.

The drawing shows the proposed grab, a general view,

The grab contains two jaws 1, rigid ti 2, lower yoke 3 with axis 4, pivotally connected with jaw I, upper yoke 5 with two pairs of guide rollers 6 fixed on the inner wall of the upper yoke 5 so that they touch with the outer surface of the vertical rod 7. To limit the progress of the rod 7, stops 8 are installed at its upper end. Loops 9 are also attached to the upper end of the rod to hang the mechanism on a crane hook (not shown), to the lower end of the rod 7 pivotally

the saxsaj-10 is suspended, made in the form of a hook, inside of which a notch 11 is hinged in the middle of the recess in its middle part with the possibility of free swing relative to the hook throat. The swinging of the hook stroke is limited by a leaf spring 12 attached to the lower end of the rod 7.

The grapple works as follows

When lowering the grapple, the jaws I rest on the surface of the load and the rod 7 along the guide rollers 6 of the upper crosshead 5 continues to fall down. In this case, the bar 11, having turned freely in the recess of the hook 10, is in the lower position, overlapping the hook shed, and the axis 4 is disengaged from the hook. Under the action of the own weight of the rod 7, the upper traverse 5, and the hook 10, through hard t g 2, the jaws 1 open. When lifting rod 7 up, jaw 1, remain smiling

on the surface of the cargo, rotate on their axles of the lower traverse and scoop up the cargo that fills the space between the jaws. In the process of further raising, the jaws I are closed, the hook 10, pushed by the spring 12, engages with the axis 4, and the bar 11 takes the upper position, closing the hook jawl. With further lifting of the rod 7, the grapple is ready for cargo transportation.

For unloading, the grapple is lowered onto the surface of the stored load and the hook 10 is disengaged from the axis 4. Then the cycle repeats.

Claims (2)

Invention Formula The grapple containing the upper and lower jaw traverse j articulated with the lower traverse, the joints connecting the jaws with the upper traverse, the rod positioned in the upper traverse with the possibility of vertical movement relative to it, characterized in that, in order to simplify the construction, the lower traverse is made in the form of an open-top box with a horizontal axis fixed in its upper part, and the fixation mechanism includes a spring-loaded hinge joint mounting on the lower end of the rod is rotatably in a vertical plane and place it in the throat of said axis, and a bracket pivotally mounted on the hook to rotate in a vertical plane and overlap hook throat yield for its size by the hook of the sock, 2. Grapple according to claim. Characterized in that it is provided with guide rollers placed on the upper traverse with the possibility of interaction with the rod.