EP2444589B1 - Auxiliary harness for releasing a clamp connection for nesting groove profiles involved in subterranean pit construction - Google Patents

Abstract

The auxiliary harness (19) has U-shaped brackets (20) that are supported on channel profile (2) of channel section and coupled with a base plate (25) which is movable along legs (22) of the brackets. The base plate is rotatably mounted on a spindle (34) which is moved against a sub-tab (13) of clamp connection (8) of the channel profile so that the brackets are fixed to the channel profile.

Description

The invention relates to an auxiliary harness for releasing a clamping connection for nested channel profiles of the underground mine excavation according to the features in the preamble of claim 1.

Such utensils count within the scope of DE 25 39 528 B1 to the state of the art. It consists of two modules that are initially independent of each other, which must be coupled with each other for on-site deployment.

A first assembly comprises a pivot bearing plate and two pivotally connected to this pivot bearing plate, U-shaped curved tie rods. To connect the pivot bearing plate to the tension struts, transversely directed recesses are provided in the end regions of the longitudinal sides of the pivot bearing plate into which the end sections of the tension struts formed from flat iron are inserted. The tension struts formed from round solid material are welded in the end sections. Swivel pins complete the swivel connection.

In addition, the first assembly still has a fork joint for a pivotable support strut. The support strut formed from a flat iron section has a trough-like end section, which is adapted to the contour of the bottom of the comprehensive channel profile. Furthermore, this still includes a chain which can be determined with an eyebolt on the pivot bearing plate and with its other end portion of the delay of the distance shock.

A second additional assembly of the known auxiliary harness comprises a plate-like swivel goggles into which a hydraulically actuated thrust piston unit is inserted. The swivel glasses is connected by means of a bayonet-type locking with the pivot bearing plate. For this purpose, two bolts with screw shanks and end nuts are provided. In addition, there are two keyhole-like recesses in the swivel goggles, which lie on the pitch circle of the bolts. The bolts are inserted into through-holes of the pivot bearing plate and welded. As a result, not only the production cost for the first module is further increased, but it also adds the manufacturing cost of the second module.

The miner, who wants to handle the known auxiliary dishes, is therefore dependent not only - logistically - to keep two separate modules at the underground place of their use ready, but he must also successively these modules on the one hand on the expansion and on the other hand to assemble with each other It should be noted that when assembling the two assemblies, the comparatively heavy thrust piston unit must be handled together with the swivel goggles. This is associated with a considerable effort and weight of only a miner barely to accomplish.

In addition, it is necessary to provide hydraulic energy at the point of use, with all the problems attached to it, in order to actuate the thrust piston unit with the aid of a hand pump.

The DE 23 22 658 C discloses an auxiliary harness with two consisting of flat iron brackets, which engage with arcuate hook behind the flanges of the inset gutter profile. Furthermore, the utensils on an abutment, which is penetrated by the legs of the bracket and is supported with a cam on the comprehensive gutter profile. The fixation of the auxiliary harness to the channel profiles is a wedge, which is driven through openings in the legs of the bracket and in this way pulls the hooks of the bracket and the abutment against each other.

The problem with this auxiliary harness is first of all the wedge, which does not ensure any safety aspects in underground mine operation considering proper clamping of the two nested channel profiles to prevent throwing away the tensioned clamping screws of the channel profiles in the overlap area together holding clamp connections.

Furthermore, in the known case behind the inset and at least indirectly on the mountains supporting gutter profile a franking on the two flanges must be created so that the hooks of the bracket can be attached behind the flanges.

Another accessory is in the DE 19 20 407 U described. In this case, an expansion on expansion elements, which are partially overlapping mutually displaced and simultaneously clamped by locks, the auxiliary crockery consists of a the expansion elements with the clip ends provided means for grasping the expansion elements and a hydraulic cylinder piston assembly in the region of the staple back. It is provided that the clamping clip consists of a traverse with hinged at both ends clamp brackets.

In addition, the describes DE 30 19 314 C2 An auxiliary device for the route construction of the underground operation of overlapping and held together with clamping connections expansion profile segments, consisting of an attachable in the overlap crockery and a clamping device, which braces the Ausbauprofilsegmente to release the tensioning device and which is operable to release the dishes from a distance. In this case, the harness consists of a pair of pliers, of which a leg is formed at one end as a hook and at the other end as a seat for the tensioning device, wherein the other pliers leg is articulated between the seat and the hook, and on its outside a ball socket as an abutment for the free end of a piston rod of the clamping connection forming hydraulic cylinder.

The DE 30 44 306 A1 shows a clamping connection with clamps, which each consist of a hook screw and a half clamp. The screw heads of the hook bolts are equipped with a laterally projecting tab in which recesses are provided, can be inserted into the claws of a release harness. The recesses are designed as two interlocking, different radii having holes. The larger bore allows easy insertion of a claw head. Free ends of the claw of the release harness are stored in a traverse. This storage should allow rotations or pivoting of the claws. After inserting the claw heads of the release harness in the recesses provided for this, the screw heads of the pressure screws are tightened and thus clamped the release harness.

In addition, a Tubby rector is known according to the DT 25 04 968 A1 , A hydraulic cylinder used for this purpose can be replaced by a spindle drive if required.

Finally, a hydraulically operated auxiliary equipment belongs to the prior art ( DE 2 254 993 C ). Apart from the fact that even with this utensils behind the flanges of the inset channel profile clearances for attaching the hooks of the bracket must be created, has such an effective hydraulic auxiliary equipment a considerable weight. Taking into account that the auxiliary harness must be determined by hand on the gutter profiles, thus its acceptance by the miners underground is low, so that the use is often omitted. However, then the risk of accidents at work with regard to breaking and then thrown clamping screws when loosening the clamp connections is very high.

The invention is - based on the state of the art - the task of creating an auxiliary harness for releasing the clamping connections of each other lying gutter profiles of underground mining expansion, which is accepted by the weight of the miners and the underground safety aspects despite a simple structure in full.

The solution of this problem is seen according to the invention in the features of claim 1.

Advantageous developments of the basic concept according to the invention are part of claims 2 to 6.

The invention then proposes an auxiliary harness with only a single assembly consisting of the two U-shaped brackets and of the end portions of the legs of the bracket relatively displaceable interspersed base plate including rotatably mounted therein spindle. Hydraulic energy does not have to be provided. The associated expense is eliminated.

Moreover, it is within the scope of the invention of advantage that the legs of the bracket are cranked. The cranking is done towards the spindle. As a result, the effective lever arms are reduced from the spindle to the neck portions of the webs of the bracket, resulting in that fewer moments are initiated. Furthermore, the stabilization of the bracket is improved during assembly. The bend also serves to make room for an impact wrench to easily access the nuts of the clamping screws.

To attach the utensils to the pit removal, the spindle is first rotated so far in the base plate until the webs of the two straps can be easily moved over the side hook-shaped portions of the upper flap, preferably behind the heads of the clamping screws. For this purpose, there is no need to create clearances behind the flanges of the inset channel profile, since the sections lie in the thickness range of the channel profiles. Subsequently, the spindle is moved against the lower flap. After their contact with the web of the lower flap over the spindle and the base plate, the straps are pulled firmly against the upper flap, so that then a secure tension of the two is ensured in each other lying gutter profiles. The insertion resistance of the channel profiles should be at least 150 kN. This ensures that the channel profiles can not slide relative to each other after loosening the easily accessible between the legs of the bracket nuts of the clamping screws.

To secure the position of the base plate on the legs of the bracket, it is advantageous that the base plate by means of nuts, in particular locking nuts, is fixable to threaded portions of the legs. These are then located on the side of the base plate opposite the split nuts. After applying the auxiliary harness to the channel profiles, the base plate can be fixed in position stabilized on the legs of the bracket in this way.

The auxiliary utensils according to the invention can be constructed comparatively easily, so that its acceptance by the miners is to be set high. Furthermore, its handling is easy. It can easily be started by a single miner and released again. In particular, these two circumstances, together with the impeccable safety-related function, should help to significantly reduce the risk of accidents.

The weight of the auxiliary harness can be reduced even further, that the brackets are formed of round material. Their production can be done with simple bending operations.

In the middle of the bottom flap opposite end face of the spindle, a mandrel is provided in an advantageous manner. This mandrel penetrates when creating the auxiliary harness in the material of the lower flap and causes a fixation of the spindle on the lower flap. As a result, not only slipping of the spindle and thus of the auxiliary harness is prevented by the clamp connection, but also created a marker that allows a bergbehördlichen control instance to properly understand if the invention, the utensils according to the invention has also been used properly when loosening the clamp connections of the channel profiles ,

Manufacturing technology, it is advantageous if the spindle is rotatably mounted in a fixed in the base plate sleeve. Appropriately, the sleeve with a provided circumferential collar and in the base plate a correspondingly adapted stepped bore is provided. The collar faces the gutter profiles. In this way, a positive connection between the sleeve and the base plate is achieved, via which the forces occurring during bracing of the auxiliary harness can be properly intercepted. Also allows this design, that the sleeve can be soldered into the base plate and does not need to be welded.

In order to rotate the spindle properly, for example by means of a striking screwdriver, a polygon can be provided at the free end of the spindle.

For the purpose of material reduction and concomitant weight reduction as well as easier access, such as a wrench to the nuts of the clamping screws, the base plate is configured in a cross shape, which is provided by the legs of the bracket penetrated holes end of the radially extending plate legs.

Advantageously, at least two legs of the bracket are connected via a tension spring. The tension spring particularly supports the parallel holding of the two brackets during assembly. It then ensures that the webs of the bracket can not slip off the hook-shaped sections of the upper flap or from the heads of the clamping screws. It is appropriate in the length range between the base plate and the end face of the mandrel carrying the mandrel.

Finally, it may be advantageous if the webs of the bracket, and in addition to the legs, spacers are provided on the inside. As a result, the contour of the heads of the clamping screws in conjunction with the lateral hook-shaped portions of the upper flap is taken into account, so that the webs can be properly positioned on the heads of the clamping screws and the hook-shaped sections.

Figur 1

in schematischer Seitenansicht den Überlappungsbereich zweier Rinnenprofile mit zwei Klemmverbindungen;

Figur 2

in schematischer Perspektive ein Hilfsgeschirr zum Lösen der Klemmverbindungen der Rinnenprofile;

Figur 3

einen Querschnitt durch die Rinnenprofile der Figur 1 entlang der Linie III - III in Richtung der Pfeile IIIa gesehen mit angesetztem Hilfsgeschirr;

Figur 4

die Darstellung der Figur 3 in Richtung des Pfeils IV gesehen;

Figur 5

eine Draufsicht auf das Hilfsgeschirr gemäß der Figur 2 und

Figur 6

in vergrößertem Maßstab den Ausschnitt VI der Grundplatte des Hilfsgeschirrs gemäß Figur 3.

The invention is explained in more detail with reference to embodiments illustrated in the drawings. Show it:

FIG. 1

in a schematic side view of the overlap region of two channel profiles with two clamping connections;

FIG. 2

an auxiliary harness for releasing the clamping connections of the channel profiles in a schematic perspective;

FIG. 3

a cross section through the gutter profiles of FIG. 1 along the line III - III in the direction of the arrows IIIa seen with attached utensils;

FIG. 4

the representation of FIG. 3 seen in the direction of arrow IV;

FIG. 5

a plan view of the auxiliary harness according to the FIG. 2 and

FIG. 6

on an enlarged scale the section VI of the base plate of the auxiliary harness according to FIG. 3 ,

With 1 is in the FIG. 1 the overlapping area of two nested channel profiles 2.3 an otherwise not shown underground mining construction referred to. These channel profiles 2,3 sit down - as well as the FIG. 3 shows - each consisting of a web 4, the web 4 adjoining, arcuately curved legs 5 and end of the legs 5 provided flanges 6 together. The flanges 6 are undercut, so that the flanges 6 of the comprehensive channel profile 2 can be positively supported in the undercuts 7 of the inset channel profile 3.

When installed, the channel profiles 2, 3 are held together in the overlapping area 1 by means of at least two clamping connections 8, which (see FIG FIGS. 1 . 3 and 4 ) in each case from one of the inset channel profile 3 engages behind upper flap 9 with lateral hook-shaped sections 10, with the flanges 6 of the incoming channel profile 3 cross beads 11 and provided between the beads 11 retracted length portion 12, a comprehensive gutter profile 2 cross-bottom flap 13 with laterally transversely projecting legs 14 and with engaging in the undercuts 7 of the flanges 6 of the comprehensive channel profile 2 beads 15 and clamping screws 16 with nuts 17 together. The clamping screws 16 are with their heads 18 in the hook-shaped portions 10 of the upper flap 9, while the nuts 17 are supported on the lateral legs 14 of the bottom flap 13.

To be able to solve the robbery of a pit removal, the clamp connections 8 safely, one of the FIGS. 2 to 6 recognizable auxiliary harness 19 used.

The auxiliary harness 19 has two round steel U-shaped bracket 20 with webs 21 and cranked legs 22. The legs 22 have end threaded portions 23 which pass through holes in radially extending legs 24 of a cross-shaped base plate 25. Due to the cross-shaped design of the base plate 25, large circumferential recesses 26 and 27 (see in particular FIG. 5 ), which contribute to the weight reduction of the auxiliary harness 19. In addition, the recesses 27 are used for trouble-free attachment, for example, an impact wrench to the nuts 17 of the clamping screws sixteenth

To secure the position of the base plate 25 on the legs 22 are nuts 28, which are rotated on the threaded portions 23 and secured by pins 29.

On the inside of the webs 21 of the bracket 20 are located next to the legs 22 spacers 30, which, in particular the FIG. 4 can recognize, the contours of the heads 18 of the clamping screws 16 and the hook-shaped portions 10 of the upper flap 9 are adjusted.

In the base plate 25, a sleeve 31 is fixed centrally in a stepped bore 42, for example soldered ( FIG. 6 ). This sleeve 31 has an internal thread 32 and a collar 33 which faces the comprehensive channel profile 2. The sleeve 31 is penetrated by a spindle 34 having a polygon 35 at the free end for attaching a impact wrench and at the opposite end a plate 36. In the middle of the end face 41 of the plate 36, a pointed spout 37 is provided.

In addition, let the Figures 2 and 5 still recognize that two legs 22 of the bracket 20 are connected by a tension spring 38 with each other. Thereby exists a force which tends to pull the brackets 20 against each other. The tension spring 38 is appropriate in the height range between the base plate 25 and the bottom flap 13. The assembly of the auxiliary harness 19 is greatly facilitated in this way.

To release the clamping connections 8, the auxiliary harness 19 is recognized in the screwed out of the base plate 25 spindle 34 in the region of a clamping connection 8 that the bracket 20 with the webs 21 perfectly on the hook-shaped portions 10 of the upper flap 9 and the heads 18 of the clamping screws 16 grasp , The auxiliary harness 19 then has the configuration of FIGS. 3 and 4 , Thereafter, nuts 39 on the threaded portions 23 which are on the above-mentioned and secured by pins 29 nuts 28 opposite side of the base plate 25, rotated in the direction of the base plate 25, so that a positional fixation of the base plate 25 is ensured on the brackets 20 , Thereafter, the spindle 34 is displaced against the web 40 of the bottom flap 13 ( FIG. 3 ), and in fact so far that the auxiliary harness 19 is applied with a force that ensures a push-in resistance of the two channel profiles 2,3 of at least 150 kN.

After the application of the auxiliary harness 19, the clamping connections 8 can be released safely, so that after relieving the auxiliary harness 19, the channel profiles 2.3 can be robbed easily.

Reference numerals:

1 -

Overlap area v. 2 and 3

2 -

encompassing gutter profile

3 -

enclosed gutter profile

4 -

Bridge v. 2 and 3

5 -

Thighs v. 2 and 3

6 -

Flanges v. 2 and 3

7 -

Undercuts at 6

8th -

Clamp connections f. 2.3

9 -

Upper flap v. 8th

10 -

hook-shaped sections v. 9

11 -

Bulges v. 9

12 -

middle section v. 9

13 -

Bottom flap v. 8th

14 -

Thighs v. 13

15 -

Beads on 13

16 -

Clamping screws v. 8th

17 -

Nuts f. 16

18 -

Heads v. 16

19 -

auxiliary dishes

20 -

Hanger v. 19

21 -

Stege v. 20

22 -

Thighs v. 20

23 -

Thread sections on 22

24 -

Thighs v. 25

25 -

Base plate v. 19

26 -

Recesses at 25

27 -

Recesses at 25

28 -

Splintmuttern

29 -

cotter pins

30 -

Spacers at 21

31 -

Sleeve in 25th

32 -

Internal thread in 31

33 -

Collar on 31

34 -

spindle

35 -

Polygonal at 34

36 -

Plate at 34

37 -

Thorn at 36

38 -

Tension spring between 22

39 -

Locking nuts

40 -

Bridge v. 13

41 -

Front side v. 36

42 -

Stepped bore in 34

Claims (6)

1. Auxiliary harness (19) for releasing a clamp connection (8) for nesting groove profiles (2, 3) in subterranean pit construction, said clamp connection comprising two U-shaped brackets (20) resting on the enclosed groove profile (3), and an abutment (25, 34) that can be coupled to the brackets (20) and rests on the enclosing groove profile (2), the brackets (20) abutting at least indirectly with their crosspieces (21) on an upper link member (9) that engages with lateral hook-shaped portions (10) of the clamp connection (8) behind the enclosed groove profile (3), characterised in that the abutment (25, 34) is formed by a base plate (25) through which the legs (22) of the brackets (20) pass in such a way that it is relatively movable, and which can be secured using nuts (28, 39) to threaded portions (23) of the legs (22), and by a spindle (34) that is supported on the lower link member (13) of the clamp connection (8) that extends over the enclosing groove profile (2) and is rotatably mounted in the base plate (25), the legs (22) being cranked towards the spindle (34).
2. Auxiliary harness according to claim 1, characterised in that a spike (37) is provided in the centre of the end face (41) of the spindle (34) located opposite the lower link member (13).
3. Auxiliary harness according to claim 1 or 2, characterised in that the spindle (34) is rotatably mounted in a sleeve (31) secured in the base plate (25).
4. Auxiliary harness according to claim 3, characterised in that a stepped bore (42) is provided in the base plate (25) and the sleeve (31) is provided with a surrounding collar (33).
5. Auxiliary harness according to one of claims 1 to 4, characterised in that a polygon (35) is provided at the free end of the spindle (34).
6. Auxiliary harness according to one of claims 1 to 5, characterised in that the base plate (25) is of cruciform configuration, wherein bores through which the legs (22) of the brackets (20) extend are provided at the ends of the legs (24) of the plate.

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