DE19837907C2 - Friction lock for an open profile connection of a sliding arch extension from rolled channel profiles - Google Patents

Abstract

A friction lock (2) for an open profile connection (1) of a sliding arch extension from rolled channel profiles (4, 5) in mining and tunnel construction with tensioning beads (45) and fillets (7), in which the channel profiles are used with one or more pressure screws (15) (4, 5) via a cross-section connecting hook (8) with reinforcements and a clamping support (12) which is supported in the fillet (7) of the lower channel profile (5) and is secured to the clamping bead (45) of the upper channel profile (4). can be clamped with a bulge (6) and lateral contact surface (14), either with a blocking connecting hook (9) or a blocking clamp support with cutting edges (28), tips or welding beads. Friction locks of this type are used in an open profile connection of a sliding arch extension made of rolled channel profiles with tensioning rollers and fillets. Since there is no need for mechanical drivers as profile stops for right and left-hand versions, the number of types of friction locks in a sliding connection can be reduced to two versions.

Description

The invention relates to a friction lock for an open profile connection Sliding bend expansion from rolled channel profiles with clamping beads and hollow fillet the channel profiles with one or more pressure screws overlap one, fixed on the tensioning bead of the upper channel profile the connecting hook with reinforcements and one, in the fillet of the un Clamp support supporting the trough profile with a bulge and lateral contact surface to be clamped, with blocking means on the friction lock Take the friction lock on the channel profiles are provided.

Friction locks of this type are described, for example, in the publications DE 20 29 862 B2, DE 197 14 076 A1 and DE 196 47 084 A1 and are described as "Open connection" used for overlap joints in slide bend removal. As blocking means for taking the friction lock on the channel profiles are drivers here, also described as driver surfaces and stop bars, intended.

However, these friction locks have major handicaps in manufacturing and in use, as a complete channel connection consisting of four variants consists of various friction locks, the hooks of which in the area of fapping profile with mechanical drivers designed as a profile stop, in a right or left version of the upper or lower profile the and for the possible reinforcement of a gutter connection with arranged in the middle friction locks, then a fifth variant without driver is required.

Such drivers can also be used as tapered pins in hook extensions Additional holes may be arranged, or it will be in a further heat treatment mechanical profile stops in the right or left version pressed.

These drivers are used in practice when the rock pressure begins run over by the function of the slide extension and thereby the requirements not fair.

The invention has for its object a generic friction lock for to design an open profile connection of a sliding arch extension and all constructive, safety-relevant parts compared to the prior art improve that with the proposed technical training of the required Connecting hooks and clamp supports do not cause the drivers to run over them can and a type reduction of the friction locks in a gutter connection only two versions and thus high economic efficiency becomes.

The object is achieved with a friction lock according to claim 1 solved. Advantageous embodiments are specified in the subclaims.

It is advantageous that in a profile connection the sliding upper Rin profile with sliding hooks, the blocking clamp support and the lower sliding channel profile, with blocking connecting hooks and sliding clamp support braced and fixed so that it can be reached te mutual blocking at the ends of the profile overlaps mechanical driver as profile stop for right or left hand execution does not require.

The blocking edges arranged in the hook area and in the clamp support, are from the applied tension force of the screw and by the ent standing tilting defect when inserting the sliding process in the longitudinal direction of the channel profiles, depending on the arrangement, in the profile leg of the top channel professional les or pressed into the groove of the lower channel profile and cause the blocking friction in the overlapping, sliding profile connection.

A friction lock can also be used as there are no profile stops for the right or left-hand version, for the central reinforcement of a profile connection, without Change from the sliding parts for the upper and lower channel profile be assembled. A major advantage for warehousing.

The mutual blocking connection between the friction lock and the Channel profile with the connecting hook or the clamp support can also be used with a spit zen, welding beads, clamped or glued in recesses Friction blocks can be achieved.  

Likewise, these parts can consist of a material that is under load through the pressure with the clamping screw and the profile friction with the leg  of the upper channel profile or in the fillet with the lower channel profile cold welded.

The arch construction from channel profiles for mining and tunneling is made up of several Ren sections assembled with overlaps and exists depending on the cross cut from several sections. The overlap to accommodate the Klemmver Binding is almost always in the radius area, so the head of the liaison kens with the blocking blades for better support of the sliding than also of the blocking frictional engagement with a radial elevation, with the clamping force in the friction lock, through the pressure applied in the middle screw in the hook head and the clamp support, is distributed more specifically.

With the radial elevation of the hook head, they press against the outer channel The blocking blades are arranged in front of the center contact on the upper one Channel profile, into the profile legs. At the same time, the angle for the profile overlapping hook head with the blocking edges held so tight that the blocking hook head wedge-shaped the profile legs to support the sliding function jammed.

The connecting hooks of the friction lock according to the invention can be used as Forged, cast steel or as a sheet metal part. With the constructi ven execution of the connecting hook as a sheet metal part is a lossless mate rial cutting enables.

The length of the pressure screw is such that it is clamped in the closed position stood with the top of the head between the ribs of the connecting hook on the clamping part is secured against damage in use.

Further developments of the invention result from the description of exemplary embodiments and the drawings. The drawings show:

Fig. 1, the left half of the cross section through an overlap joint of two Rin nenprofile in the elbow extension, with the section through a Gleitverbin extension with an open friction lock, in the tensioned state with a blocking connecting hook and a slidable clamp support for the lower channel profile. Execution as a forged part.

Fig. 2, side view and section AB of Fig. 1, a friction lock. Execution as a forged part.

Fig. 3, the left half of the cross section through an overlap joint of two channel profiles in the elbow extension, with the section through a connec tion as an open friction lock in the tensioned state with blocking support render and a slidable connecting hook for the upper channel profile. Execution as a forged part.

Fig. 4, side view and section CD of Fig. 3, a channel connection with the interlocking, blocking and sliding parts. Execution as a forged part.

Fig. 5, forms of the blocking connecting hooks: a.) With cutting edges b.) With tips and c.) With welding beads

Fig. 6, two clamped friction pieces: a.) For blocking connecting hooks in cross-section and in side view with section KL and b.) For blocking clamp supports in cross-section and in side view in section MN

Fig. 7, side view and top view of an open profile connection.

Fig. 8, the left half of the cross section through a third embodiment of the friction lock with blocking connecting hook and a slidable clamp support and the cut OO. Execution as a bent sheet metal part.

Fig. 9, the right half of the cross section through a fourth embodiment of the friction lock with a blocking connecting hook and a slidable clamp support with the section PP. Execution as a bent sheet metal part.

Fig. 10, representation of a longitudinal section through a fifth embodiment of the connecting hook with side view and plan view as section QQ. Execution as a bent sheet metal part.

Fig. 11, the right half of the cross section through a sixth embodiment with a blocking connecting hook and a slidable clamp support design as a bent sheet metal part with a radial or arcuate cross section RR of the connecting hook.

Fig. 12, hook head with a.) Tight blocking edges and b.) Blocking edges with a large distance.

Fig. 13, radially exaggerated hook head: a.) With blocking blades on the outside and b.) With outside and inside blocking blades.

Fig. 14, diagram of a lossless material cut for the connecting hook.

A friction lock with friction blocks that are in recesses of the connection hook or the clamp support are glued, is not shown as a figure.

Function description:

The friction lock 2 according to FIG. 1, in a forged version, engages with the blocking connecting hook 9 with the cutting edges 28 , the hook plate 25 and the ribs 10 , the channel profiles 4 and 5 with the profile legs 16 , 17 and the fillet 7 , the tensioning bead 45 . The slidable clamp support 12 is rotated by 90 ° with the guide pin 18 and the safety hook 26 through the guide window 19 inserted into the hook plate 25 and then swung in, with the connecting hook 9 an assembly unit.

With the reinforcing ribs 21 on the clamping part 20 are with the pressure screw 15, the slidable clamping support accommodates the guide cone 22 in the guide bore 23 12 with the clamping bead 6, abuts with the supporting surface 11 at the abutment surface 14, the stress forces in the friction lock 2 up brings and the clamp support 12 against unscrewing when sliding the channel profiles 4 and 5 , safely performed.

With the Verspannungshub 27 gaping channel sections 4 and 5, compressed with difference union rolling tolerances during assembly of the Gleitausbaus without further aids.

In FIG. 2, with the representation of the section AB of FIG. 1, the cutting edges 28 engage a blocking of the connecting hook 9, the friction lock 2 in the profile legs 16 of the upper channel profile. 4 With the pressure screw 15 , the required clamping forces are applied via the clamping part 20 with the rip pen 21 .

The second embodiment of a friction lock in a forged version with a slidable connecting hook 8 and a blocking clamp support 13 is shown as a tensioned lock 3 in FIG. 3. In an insertion between the channel profiles 4 and 5 , the clamp support 13 , with the cross-profile connecting hook 8 is set so that it can not unscrew from the groove 7 of the lower profile 5 and thereby the tensioning of the friction lock 3 is ineffective. The clamp support 13 engages with the guide pin 18 through the guide window 19 , becomes a mounting unit with the securing hook 26 and fixes the friction lock 3 against buckling in the end position of the tensioning stroke 27 .

In FIG. 4, with the representation of the section CD in Fig. 3, the cutting edges 28 engage the blocking clamping support 13, of the friction lock 3 in the groove 7 of the lower channel profile 5. With the pressure screw 15 , the necessary clamping forces are brought up via the clamping part 20 with the ribs 21 .

. The deposited weld beads 30 a) with the cutting edges 28 as the section EF, b) the tips 29 c in section GH and) shown with the cut IJ: in Figure 5, are in three pictures the different ways of blocking cutting and... .

According to FIG. 6, showing a.) With the cut KL and b.) With the cut MN is the connection hooks 8 with the hook head in the cross-profile area or the clamping support 12, with clamped-friction pieces 31 or in recesses bonded loaded friction blocks provided , which at the Ver tension with the pressure screw 15 in the profile leg 16 of the upper gutter profile 4 , or in the groove 7 of the lower gutter profile 5, and thus connect with the gutter profiles 4 or 5 so that the slidable trough profiles 4 or 5 should not be hindered by the rock pressure when the slide expansion starts to function.

With FIG. 7 is a complete open profile compound 1 is shown in front view and plan view with friction locks 2 and 3 to the profile overlaps. Additionally arranged friction locks 32 reinforce the open profile connection 1 for geologically difficult conditions.

The third embodiment of a friction lock is shown in FIG. 8 with a blocking connecting hook made of a sheet metal blank 43 , with a wedge angle 42 and a slidable clamp support 12 . In the clamped state, the wedge angle 42 is kept so tight for the cross-profile, blocking locking hook head that it encompasses the upper profile leg 16 and supports the sliding components 8 and 12 in the open profile connection 1 in the function effectively. The head of the pressure screw lies between the externally formed ribs 10 in the protected area of the clamping part 20 . The sheet metal blank 43 is shown deformed in the section 00 with a central bead 33 .

In Fig. 9, the connecting hook 34 is shown as a fourth variant from the Blechzu section 43 with 90 ° ribs 10 with the section PP. The bracing forces of the pressure screw 15 are parallel to the channel profiles 4 and 5 , in the plane 24 of the profile legs 16 , 17 and the clamp support 12th

The fifth embodiment of a connecting hook 35 is shown in the three views of FIG. 10 with the section QQ from the sheet metal blank 43 . Greater lateral stability is achieved with a rib angle of <45 °.

In Fig. 11, the sixth embodiment of a connecting hook 36 is shown with egg nem radially or arcuate cross-section RR with the required stability for the clamping part 20 is brought up with the pressure screw 15 .

The further formation of the hook heads 37 and 38 with cutting edges is shown in an arrangement a.) With the section SS and an arrangement b.) With the section TT in FIG. 12.

The hook head 39 of FIG. 13, the connecting hook 9, for better support of the blocking frictional engagement in an open Profilverbin dung 1 having a radial or arcuate camber executed with which the clamping force in the friction lock 9 is distributed specifically by the Druckschschraube 15th

With the radial or arcuate elevation of the hook head 39 , the blocking edges 40 or 41 arranged on the outer edges on the upper channel profile 4 press into the profile legs 16 , or the blocking edges of the clamping support 13 in the fillet 7 and ensure a smooth sliding process in the open profile connection 1 . This is additionally supported by the tilting defect that occurs when the gliding process begins.

A loss-free sheet metal blank 43 for the connecting hooks 33 , 34 and 35 is shown in FIG. 14 with the symmetrical, central material transition 44 .

Reference list

1

Open profile connection

2nd

Friction lock with

9

and

12th

3rd

Friction lock with

8th

and

13

4th

Upper gutter profile

5

Lower gutter profile

6

Tension bead from

12th

and

13

7

Fillet of

5

8th

Slidable connecting hook

9

Blocking connection hook

10th

Ripping of

8th

or

9

11

Support surface of

12th

and

13

12th

Slidable clamp support

13

Blocking clamp support

14

Investment area of

5

15

Pressure screws

16

Profile leg from

4th

17th

Profile leg from

5

18th

Guide pin from

12th

or

13

19th

Guide window from

25th

20th

Clamping part from

8th

or

9

21

Ribs on

20th

22

Guide cone from

15

23

Guide hole in

12th

and

13

24th

Clamping plane

25th

Hook plate from

8th

and

9

,

33

to

36

26

Safety hook from

18th

27

Tension stroke from

15

28

To cut

29

sharpen

30th

Welding beads

31

Blocking part

32

Friction lock

33

Connecting hook

34

Connecting hook

35

Connecting hook

36

Connecting hook

37

Hook head

38

Hook head

39

Hook head

40

Blocking cutting

41

Blocking cutting

42

Wedge angle

43

Sheet metal cutting from

25th

44

Material transfer

45

Tension bead from

4th

Claims (20)

1. Friction lock for an open profile connection ( 1 ) of a sliding elbow extension from rolled channel profiles ( 4 , 5 ) with clamping beads ( 45 ) and fillets ( 7 ) in which with one or more pressure screws ( 15 ) the channel profiles ( 4 , 5 ) via a Tensioning bead ( 45 ) of the upper channel profile ( 4 ), cross-profile connecting hooks ( 8 , 9 , 33 to 36 ) with reinforcements and a clamping support ( 12 , 13 ) with tensioning bead, which is supported in the groove ( 7 ) of the lower channel profile ( 5 ) ( 6 ) and lateral contact surface ( 14 ) are clamped ver, wherein on the friction lock blocking means for taking the friction lock on the channel profiles ( 4 , 5 ) are provided, characterized in that the blocking means by the connecting hook ( 9 , 33 , 34 and 36 ) or on the clamp support ( 13 ) of the friction lock, foreseen cutting edges ( 28 ), tips ( 29 ) or welding beads ( 30 ) are formed, which are used for blocking by means of the pressure screw or pressure screws ( 15 ), in the clamping bead ( 45 ) of the upper channel profile ( 4 ) or in the fillet ( 7 ) of the lower channel profile ( 5 ) can be pressed in, and that the blocking hook ( 9 , 33 , 34 and 36 ) or to the blocking clamp ( 13 ) of the friction lock associated clamp support ( 12 ) or the associated connection hook ( 8 , 35 ) with respect to the respective channel profile ( 5 or 4 ) is designed to be slidable. 2. Friction lock according to claim 1, characterized in that the cutting edges ( 28 ) or welding beads ( 30 ) are arranged at a win angle of 90 ° to the longitudinal direction of the profile legs ( 16 , 17 ). 3. Friction lock according to claim 2, characterized in that the hook head ( 39 ) of the blocking connecting hook ( 9 , 33 , 34 and 36 ) in the longitudinal direction to the profile leg ( 16 ) is formed radially or arcuate in height and is designed with external blocking cutters ( 40 ) . 4. Friction lock according to claim 3, characterized in that the hook head ( 39 ) of the blocking connecting hook ( 9 , 33 , 34 and 36 ) in the longitudinal direction to the profile leg ( 16 ) is formed radially or arcuate and with external and internal blocking cutters ( 41 ) is executed. 5. Friction lock according to one of claims 1 to 4, characterized in that the blocking cutting edges as a blocking part ( 31 ) are clamped. 6. Friction lock according to one of claims 1 to 4, characterized characterized in that the blocking edges as blocking are inserted glued into cutouts. 7. Friction lock according to one of claims 1 to 6, characterized in that the cutting edges ( 28 ), tips ( 29 ) or welding beads ( 30 ) consist of a material which is cold welded to the channel profiles when loaded by the pressure screws ( 15 ) . 8. Friction lock according to one of claims 1 to 7, characterized in that the clamp support ( 12 , 13 ) with a guide pin ( 18 ) in a guide window ( 19 ) of the connec tion hook ( 8 , 9 ) is guided. 9. Friction lock according to claim 8, characterized in that the clamp support ( 12 , 13 ) with the guide dome ( 18 ) and at least one securing hook ( 26 ) from the profile side perpendicularly through the guide window ( 19 ) in a hook plate ( 25 ) of the connecting hook ( 8 , 9 , 33 to 36 ) feasible and rotatable by 90 ° is arranged to form a Monta geeinheit. 10. Friction lock according to one of claims 1 to 9, characterized in that the reinforcements of the connecting hook ( 8 , 9 , 33 to 36 ) are designed as ribs ( 10 , 21 ). 11. Friction lock according to one of claims 1 to 10, characterized in that the connecting hooks ( 8 , 9 , 33 to 36 ) and / or the clamp supports ( 12 , 13 ) are designed as drop forged, cast steel or sheet metal parts. 12. Friction lock according to claim 11, characterized in that the connecting hook ( 33 to 36 ) is formed from a loss-free sheet metal blank ( 43 ) with a central bead. 13. Friction lock according to claim 12, characterized in that the connecting hook ( 34 ) from a loss-free sheet metal blank ( 43 ) is designed as a bent part with outer 90 ° ribs. 14. Friction lock according to claim 12, characterized in that the connecting hook ( 35 ) from a loss-free sheet metal blank ( 43 ) is ausgebil det as a bent part with outer <90 ° ribs. 15. Friction lock according to claim 12, characterized in that the connecting hook ( 36 ) from a loss-free sheet metal blank ( 43 ) is designed as a bent part with a radial or bogenförmi gene cross-section. 16. Friction lock according to one of claims 1 to 15, characterized in that the wedge angle ( 42 ) for the profile overlapping the blocking connecting hook ( 9 , 34 , 35 and 36 ) is kept smaller than the angle of the profile leg ( 16 ) on the upper channel profile ( 4 ). 17. Friction lock according to one of claims 11 to 16, characterized in that the material transition ( 44 ) in the sheet metal cut ( 43 ) between the cutting area hook head ( 37 , 38 and 39 ) and the cutting area clamping part ( 20 ) is arranged symmetrically. 18. Friction lock according to one of claims 10 to 17, characterized in that the screw head of a centrally arranged pressure screw ( 15 ) between the ribs ( 10 ) of the connec tion hook ( 8 , 9 , 34 , 35 and 36 ) is arranged flush. 19. Friction lock according to one of claims 1 to 18, characterized in that on the connecting hooks ( 8 , 9 , 33 to 36 ) and / or the clamp supports ( 12 , 13 ) identifying marks are introduced, which have a blocking or slidable effect from the outside show visible. 20. Friction lock according to claim 19, characterized in that the identifying marks raised or recessed on the connec tion hook ( 8 , 9 , 33 to 36 ) and / or the clamp supports ( 12 , 13 ) are attached.