DE357097C - Claw crane with swinging claws and safety bolts - Google Patents

Description

GERMAN EMPIRE

ISSUED AUGUST 18, 1922

REICH PATENT OFFICE

PATENT LETTERING

CLASS 35 b GROUP 7

(D 3Q249 X

Deutsche Maschinenfabrik A. G. in Duisburg.

Claw crane with swinging claws and safety bolts.

Patented in the German Empire on March 10, 1921.

The invention relates to a claw crane with swingable claws and! Safety latches to prevent the Load from the claws, whereby to swing the claws in and out for the purpose of grasping or releasing the load two mutually displaceable cross members are provided.

The new thing is that the safety bar can swing vertically on the upper one Arranged cross member and connected by handlebars to the cross member carrying the claws are in such a way that when the cross members are moved relative to one another, the safety bar under description of a certain

Ivurvenbahn opposite the claws get into or out of the final position.

The subject of the invention has the advantage over known similar devices that the load to be carried through neither when securing nor when releasing the same the latch cause any disturbance or impediment to the bolt movements can give, since the bolt from the side into the final position and vice versa when releasing the load, give way to the side in order to then lie vertically or almost vertically on the crossbeams; The lowest space requirement for the bolt movement is also given.

In the drawing, an embodiment of the invention is shown schematically in various ways Working positions reproduced.

Fig. Ι shows the device with claws pushed under the load to be transported, while

Fig. 2 shows a position when bringing the bolt forward.

In Fig. 3 the safety bars are in their final position.

Fig. 4 shows the claws, which are inclined to allow the load to slide off, with the as a result conditional position of the bolt.

The claws α are keyed in a known manner on a shaft b and are carried by means of bearing blocks c from the cross member d consisting of two U-irons. The crossbeam is attached to one or more rigid supporting frames e , which in turn can be raised and lowered on the crane girder, not shown. Above the cross member «?, <2, the second cross member, consisting of the U-irons /, f, is arranged in a known manner, which can be held at the height independently of the lifting and lowering movements of the cross member d, d. On the one U-shaped iron f of this cross member, the latches labeled g are attached rotatably about h and connected at k by a link i to the cross member d, d or the bearing blocks c . The links i are also mounted on the lower cross member so that they can rotate about point m. On the shaft b , apart from the claws a, levers ο are wedged, which are articulated with their free ends at p with angled rods q . The latter are resiliently attached with their free end by a slot guide r to the cross member /, f , the possibility of movement of these rods relative to the cross member f, f is limited by the length of the slots r.

The mode of operation that can be seen in detail from the illustrations shown of the claw crane is briefly as follows:

The claws α are in the position shown in Fig. Ι under the on trestles! o. The like. Dormant load pushed, after which the lower cross member d, d is raised together with the load. The upper cross member f, f is here held in its height position. As a result of the arrangement described, the upward movement of the cross member d, d causes the bolts g to move out of the position as indicated in Fig. 1, via the position illustrated in Fig Final position, which is shown in Fig. 3, and in which the load is secured against slipping. If the load is then to be dropped again, the cross member d, d is lowered in relation to the cross member /, f , whereby the claws cc, remaining in a horizontal position, lower together with the load until the downward movement of the cross member d , the lowering rods q is terminated through the slots r. The claws and bolts are then again in the position shown in Fig. 1. As the cross members d, d are lowered further, the lever 0 rotates about b, so that the claws σ thereby move into the inclined position shown in Fig. 4. The load can then slip off the claws α , and the bars g, as a result of the arrangement discussed, lie almost vertically on the two cross members, so that the lateral deflection of the bars g is limited to a minimum and thus the aforementioned small space for the bolt movement is enabled.

Claims (1)

Patent claim: Claw crane with swingable claws "and safety bolts to prevent the load from sliding off the claws, whereby two cross members which can be displaced against each other are provided for swinging the claws in and out, characterized in that the safety bar (g) can swing vertically on the upper cross member (f, f) arranged and connected by handlebars (i) to the cross member (d, d ) carrying the claws (a) , in such a way that when the cross members (/, / and d, d) are moved relative to one another, the safety bolt (g) under description a certain curved path opposite the claws (a) get into the final position or from the same. 1 sheet of drawings.