DE804918C - Warp bolt for the pit construction - Google Patents

Description

The present lag bolt consists of one between two pit support frames to lie strong round or angular wood with one at each end roughly half incised and hewn, about 200 mm long Leafing, with the upper parts on the heads of the expansion rails and the lower, obliquely cut part come to rest on the foot of the same. These lag bolts give the pit supports a secure, firm and immovable hold, fall also - with the strongest rock pressure and bending of the rails not out like it otherwise it is the case, with the support frames falling over and causing large breaks in the route can arise.

With the new lag bolts, the pit extensions get a significant longer service life, the bolt can withstand many times that of an ordinary bolt, always sits tight and is tensed even more tightly with strong pressure and cannot get lost by falling out. It serves especially to strengthen the expansion, since the upper part acts as a draft point to intercept the mountains, during the lower part is designed as a bolt. Since both parts form a whole, possesses the same an increased durability and safety compared to a common bolt. It occurs mainly with strong pressure through the protruding ends, which are thereby place them over the heads of the expansion rails, a kind of clasping the rail head one, which collapses in the event of the punches underneath breaking away Prevent the expansion parts, because the strong distortion bolts are usually of this type Depressed deeply on the heads of the expansion rails that any danger of one around A collapse of the route is as good as impossible, so that this contributes a great deal to mine safety.

The application and production is simple, without any additional costs would arise.

Old wood pit stamps are cut out and hewn to match and introduced between the line extensions, whereupon the extension is wedged.

The expansion of the route can neither be shot over, pushed over nor otherwise brought about to be overturned and is completely accident-proof.

The lag bolts can also be used to bolt the punches are and are used in stable, wood or combined pit construction.

An application example is shown in the drawing.

Fig. A shows a side view of a lag bolt. A is the Verzugbolzeil, b and c are the, beren, protruding parts of the same, which on the head of the extension rails come to rest, (l and e are the lower ones, diagonally cut parts, which are on the foot of the expansion rails between the expansion rest.

Fig. B shows a warp bolt between two expansion rails. A is the warp bolt, b and c are the upper, protruding parts of the same, lying on the heads of the expansion rails, d and e are the lower, diagonally cut parts on the feet of the expansion rails. 'With f and g the: Iusbauschienen are designated. '

Claims (3)

PATENT CLAIMS: i. Warp bolts for catching and securing the mountains for route extensions of any kind using round or angular strong ones Wood with one cut diagonally up to about halfway at each end and approximately 200 mm long carved leaf, in which the upper part (leaf) on the Head and the lower, shorter, sloping part lies on the foot of the extension rails, characterized in that the upper, projecting part of the delay bolt at the same time serves as a pinch wood, while the entire upper half of the bolt here causes the warpage to secure the hanging wall. 2. Warp bolt according to claim i, characterized in that that the lower, recessed, obliquely cut out and on the foot of the expansion rails The part of the wood resting on it forms the actual bolt. 3. Lag bolts after claims i and 2, characterized in that the delay bolt in pure Timber construction as well as combined types of construction is used. Route expansion, characterized in that two or more delay bolts between the individual expansion frames according to claims i to 3 are attached depending on the size of the cross-section, while there is a built-in default between them.