DE3230335C2 - Bolting of expansion arches for route expansion in mining - Google Patents

Abstract

In the case of a bolting of expansion arches, the bolts consist of angularly profiled struts, which are fastened to the expansion arches by means of two hook screws, the hooks of which encompass the expansion arch flange edges and whose shafts reach through corresponding penetrations in the struts, the struts being arranged in such a way that One of the first angle profile legs is supported on the back of an extension arch, while the other, second angle profile leg has a recess into which the extension arch engages with its back part, in order to increase the flexural strength of the strut (2, 3) in the area of the recess ( 4) this ends at a distance in front of the inside of the first angle profile leg (10) and on the inside of the first angle profile leg (10) is a raised rib (11) running along the strut (2, 3) in the middle between the hook screw openings (7) and near the free profile leg edge ) arranged, the height of which corresponds to the distance de s recess base from the inside of the first angle profile leg (10) and the length of which corresponds to at least the width of the recess (4).

Description

The invention relates to a bolting of channel-shaped profiled expansion arches, wherein the bolting consist of angular profiled struts which on the extension arches by means of two hook bolts, the hooks of which encompass the flange edges of an extension arch and the corresponding shafts Reach through penetrations in the struts, are attached, the struts are arranged so that each the one, first angle profile leg is supported on the back of an extension arch, while in the other, second Wiiiikelprofilschenkel a recess is arranged, in which the extension arch engages with its back part form-locking, the recess at a distance ends from the inside of the first angle profile leg.

A bolt of this type (type D. B.- R Öl36 N) is from the manual from Heinrich Schäfer, Altendorf / Ruhr, known, which contains all bolts with type designations developed by the above company before 5.3.1982 and approved by the Oberbergamt.

The distance between the aforementioned recess and the inside of the first angle profile corresponds to

schenkeis the thickness of the first angle profile leg.

Furthermore, on the first angle profile leg of the second strut there is a leg part engaging between the first angle profile leg and the extension arch cut, with which a tilt-free installation of both struts on the extension arch can be achieved

Here, however, there is the disadvantage that notches have to be made on both end parts of the struts.

! 0 In addition, a tilt-free installation of the struts on the extension arch is only ensured, even if it is free Leg part of the second strut engages under the web of the extension arch.

But this fact is certainly not the case.

ben if the route expansion with an expansion arch provisionally ends in order to then continue driving the line, with the extension of the line being particularly endangered by blasting

In addition, the

Route for further route expansion, i.e. to connect further struts and expansion arches to the already existing route expansion on the last one Remove both strut fastening screws before attaching further struts to the front can be connected to the last expansion bend.

The object of the invention is now a bolting of the in the preamble of claim 1 specified type to improve such that while maintaining a tilting free plant of the expansion arch on the strut with simple inexpensive means and measures without Additional expenditure on material a simplification of the route expansion can be achieved, which is also a simpler one and cheaper to manufacture

The solution to this problem is characterized in that a raised rib running along the strut is arranged on the inside of the first angle profile leg, centrally between the hook screw openings and near its free edge ; The distance between the base of the recess and the inside of the first angle profile leg is the same and its length is at least equal to the width of the recess.

The measures already ensure that the strut is positioned correctly and tilt-free in the area of the Recess reached without additional funds before the latter is connected to the following strut

Furthermore, only one fastening screw needs to be loosened to connect a further strut to the existing track extension.

M In addition, the notch that was previously required is no longer required on the end part of the strut facing away from the recess.

The flexural strength of the Strive in the area of the aforementioned recess increased considerably.

For inexpensive production, it is advantageous to form the rib.

For this purpose, one embodiment is characterized in that the rib is designed as the inside of the first win- is formed kelprofilschenkels bent edge part

A preferred embodiment which is particularly advantageous in terms of production technology is that the rib through one to the inside of the first corner profile kels is formed towards pushed-through bead, with in front preferably also the height of the rib about '/? corresponds to the width of an isosceles angular profile.

Embodiments of the invention are shown in the drawing and will be described in more detail below described. It shows

F i g. 1 shows a bolt in the front view;

2 is also seen in the direction of the line 11-11;

F i g. 3 shows a part of a variant in a front view; F i g. 4 also in section IV-IV.

Here are on a gutter-shaped profiled extension arch 1 two slabs 2 and 3 attached, which run parallel to each other and at right angles to the extension arch 1 are arranged directed. The struts 2 and 3 consist of isosceles angular profile bars.

Both struts 2 and 3 each have a recess 4 in the area of one end part in which the back of the expansion arch 1 engages form-locking. There is a hook screw on both sides of the extension arch 1 5 and S are provided, the hooks of which encompass the free flange edge parts of the expansion arch 1, while the shafts of the hook bolts 5 and 6 reach through corresponding penetrations of the struts 2. On the Thread zones of the hook screw :! 5 and 6 are Screw nuts 8 screwed on, with which the Struts 2 and 3 are non-positively applied to the back of the extension arch.

The other end part of the strut 2 is designed as shown in the strut 3, this end part with its front side is supported on the flank of an extension arch

The recess 4 is arranged in the angle profile leg 9 which is aligned in the same direction as the hook bolts 5, 6 and ends at a distance from the inside of the other angle profile leg 10.

The latter is in the middle between the hook screw openings 7, one that runs along the strut, preferably rather than towards the inside of the angle profile leg 10 molded through rib 11, the height of which corresponds to the distance from the bottom of the recess 4 from the Inside of the angle profile leg 10 corresponds, so that a so-called for the back of the extension arch 1 Two-point system is given, which at least tilts the mounted struts out of the straightened position difficult.

According to Figures 3 and 4, the rib 1 is through a formed inwardly angled, free edge part of the profile leg 10.

The height of the rib 11 corresponds at least to the thickness of a profile leg. Their length should be as possible be larger than the greatest width of the recess 4.

50

1 sheet of drawings

55

b0

Claims (5)

Patent claims: 1. Bolting of channel-shaped profiled expansion arches, the bolts consisting of angularly profiled struts, which are attached to the expansion arches by means of two hook bolts, the hooks of which encompass the flange edges of an extension arch and the shafts of which reach through corresponding openings in the struts, are attached, the struts are arranged in such a way that in each case one of the first angled profile legs is supported on the back of an extension arch, while a recess is provided in the other, second angle profile leg is arranged, in which the extension arch engages with its back part form-locking, the recess at a distance from the inside of the first Angled profile leg ends, characterized in that the inside of the first angle profile leg (10) is centered between the hook screw front breaks (7) and near its free Edge a along the strut (2,3) extending raised rib (11) is arranged, the height of the Distance of the recess base from the inside of the first angle profile leg (10) is the same and the length of which corresponds at least to the width of the recess (4) 2. bolting according to claim 1, characterized by an integrally formed rib (11). 3. bolting according to claim 2, characterized in that dr.Q the rib (11) than to the inside of the first angle profile leg (10) bent edge part formed K-t. 4. bolting according to claim 2, characterized in that the rib (11) du. -H a bead pressed through towards the inside of the first angle profile leg is formed. 5. Bolt according to one of claims 1 to 4, characterized in that the height of the rib (11 _{) corresponds approximately to V 5 of} the width of an isosceles angular profile strut (2,3).