GB2129030A - Mine roof support clamp - Google Patents
Mine roof support clamp Download PDFInfo
- Publication number
- GB2129030A GB2129030A GB08327166A GB8327166A GB2129030A GB 2129030 A GB2129030 A GB 2129030A GB 08327166 A GB08327166 A GB 08327166A GB 8327166 A GB8327166 A GB 8327166A GB 2129030 A GB2129030 A GB 2129030A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bottom member
- tension connection
- connection according
- tension
- resilient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000005065 mining Methods 0.000 claims abstract description 5
- 210000000078 claw Anatomy 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims 1
- 230000037431 insertion Effects 0.000 description 6
- 238000003780 insertion Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Clamps And Clips (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
A tension connector to surround and secure together channel-shaped sections 3, 4 for mining supports. The connector comprises a resilient top member 5 and a bottom member 6 which is also of resilient construction. The top member has a pair of screw- threaded spindles 8 at its ends which pass through corresponding holes 13 in the bottom member 6. The two parts of the connector are then secured together under tension by lock nuts 17. <IMAGE>
Description
SPECIFICATION
A tension connection for interfitting slidable channel sections for mining supports
This invention relates to a tension connection for interfitting slidable channel sections for mining supports, in which the resilient top member is screwed to the bottom member.
The main feature of flexible mining supports is that the channel-section segments making up the multi-element arches which form the supports overlap at their connecting points, said sections being disposed co-directionally one inside the other, and can then slide inside one another if the rock pressure exceeds the frictional resistance produced by the predetermined clamping tension at the connecting points.
Resilient dynamic tension connections are known (DAS 27 26 455, DOS 28 54 457). They have the disadvantages that they are expensive to produce and are complex to fit in underground workings. Individual prestressing is impossible, and the same applies to post-tensioning.
Known tension connections consisting of top and bottom members are connected by two screws. The resulting box-shaped saddle has high flexural rigidity, but is not particularly suitable for taking impacts from the rock. This tension connection has substantially no resilient properties of the kind increasingly required.
The object of this invention is to provide a tension connection of the kind referred to hereinbefore, which is simple and cheap to make, easily installed, and ensures reliable bracing of the channel sections in response to variations in rock pressure.
To this end, according to the invention, the top member has screw spindles at both ends and the bottom member is also of resilient construction.
According to one aspect of the invention, the bottom member is V-shaped, has a constant wall thickness and outwardly curved flanges, and the bottom member is so shaped that it contacts only the bottom edge of the flange of the outer channel section, said bottom edge being in the form of a nose.
According to another aspect of the invention, the flanges of the bottom member are bent down from the horizontal.
The particular advantages of the invention are that uniform sliding of the channel sections is possible in response to variations in the rock pressure, because the entire tension connection can behave elastically. The tension connection according to the invention can also be prestressed within a wide range. Also, it is easily fitted and removed in underground workings.
Fig. 1 illustrates two channel sections 3 and 4, at the free ends of which are disposed a main saddle 1 and a guide saddle 2. These tension connections consist of top members 5 and bottom members 6, which are bolted together by means of lock nuts 1 7. The top members 5 have screw spindles 8 for this purpose. Top member 5 of the main saddle 1 has two claws 10 to ensure that the main saddle 1 is also moved on insertion of the channel section 3, the same effect being achieved for the guide saddle 2 by means of claws 16.
Fig. 2 is a cross-section of a tension connection. The channel sections are denoted by references 3 and 4. The resilient top members 5 are of M-shaped construction and in the zone 7 where they are tensioned against the flange 1 5 of the inner section 3, they have a parallel flat with semi-circular edges in the direction of insertion.
Their free ends extending perpendicularly to the direction of insertion are cylindrical, however, and have screw spindles 8 for tensioning with the bottom member 6.
The middle part 9 of the top member 5 is of such a configuration according to the invention as to form a kind of handle to facilitate handling during transport and assembly.
The top member 5 is additionally provided with a claw 10 at each of the convex arcuate sections at the main saddle, and this claw engages behind the flange 1 5 of the inner section 3. This ensures that the main saddles 1 also move on insertion of
the channel section 3.
The bottom member 6 is of V-shaped crosssection with outwardly curved flanks 11 each terminating in flanges 12 via an arc and being bent downwards from the horizontal. The flanges
12 have oval holes 1 3 through which the screw spindles 8 of the top member 5 are passed after the bottom member has been so fitted against the ends of the interfitting channel sections 3 and 4 as to engage from below around the outer channel section 4. In these conditions it bears only against the bottom nosing 14 of the flange 1 5.
The centres of the holes 1 3 in the bottom member 6 of the main saddles 1 are on the transverse axis of symmetry of the bottom member 6. On the other hand, the centres of the holes 13 in the bottom member 6 in the guide saddles 2 are offset eccentrically in relation to the member edge situated opposite the free end of the outer channel section 4 in the overlap zone. Thus when the guide saddle 2 is tensioned a force is built up to counteract the tipping force occurring on insertion of the channel sections 3 and 4.
Movement of the guide saddle 2 during the insertion movement is ensured by the fact that the bottom member 6 has two claws 1 6 symmetrically to the centre axis at its edge associated with the end of the outer channel section 4, said claws engaging behind said end.
The necessary pre-stressing is obtained by screwing the top member 5 to the bottom member 6, lock nuts 1 7 preferably being used.
The longitudinal force produced in the flanges 1 2 of the bottom members 6 by the tightening of the lock nuts 17 produces a bending moment about the contact area 1 8 between the top flange curvature of the bottom member 6 and the nose 14 of the flange 1 5 of the outer section 4. The antipole of this pressure area 1 8 is the area 19 between the inner arc of the top member 5 which, at this point, is in the form of a parallel flat with semicircular edges, and the spine 20 of the flange 1 5 of the inner section 3. This results in substantially ideal tensioning of the interfitting channel sections 3 and 4 with the contact pressures being extensively transmitted to the slideways defined by the flange construction.
The screw tensioning between the screw spindle 8 and the flange 12 provides a resilient suspension in response to impacts followed by immediate closure of the screw connection so that only low pressure amplitudes occur at relatively high frequency.
During prestressing, the outwardly curved flanks 11 of the bottom member 6 are bent away from the outer channel section 4 as a result of the bending moment occurring at the contact area 18, so that there is no risk of any rubbing, which would have a very adverse effect on the sliding movement, or even any risk of seizing, at the flanges of the channel sections 3 and 4 in the overlap zone.
The provision of semi-circular edges on the bottom member 6, which is in any case formed as a parallel flat, and on the top member 5 which is also in the form of a parallel flat in the contact area 1 9 is intended for the same purpose.
Claims (7)
1. A tension connection for interfitting slidable channel sections for mining supports, comprising a resilient top member screwed to a bottom member, wherein the top member has screw spindles at both its ends and the bottom member is also of resilient construction.
2. A tension connection according to Claim 1, wherein the bottom member is V-shaped, has a constant wall thickness and outwardly curved flanks, and the bottom member is so shaped that it contacts only the bottom edge of the flange of the outer channel section, said bottom edge being in the form of a nose.
3. A tension connection according to Claim 1 or
Claim 2, wherein the flanges of the bottom member are bent down from the horizontal.
4. A tension connection according to any preceding claim wherein the flanges of the bottom member have oval holes.
5. A tension connection according to any preceding claim wherein the top member where it contacts a channel section under pressure is in the form of a parallel flat with semi-circular edges and has a gradual transition to the circular crosssection of its middle part.
6. A tension connection according to any preceding claim wherein the top members of the main saddles and the bottom members of the guide saddles have claws and respectively.
7. A tension connection substantially as herein described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823239343 DE3239343C2 (en) | 1982-10-23 | 1982-10-23 | Clamping connection for sliding channel profiles that lie one inside the other for pit lining |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8327166D0 GB8327166D0 (en) | 1983-11-09 |
GB2129030A true GB2129030A (en) | 1984-05-10 |
GB2129030B GB2129030B (en) | 1986-03-19 |
Family
ID=6176474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08327166A Expired GB2129030B (en) | 1982-10-23 | 1983-10-11 | A tension connection for inerfitting slidable channel sections for mining supports |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE898064A (en) |
DE (1) | DE3239343C2 (en) |
FR (1) | FR2534965B1 (en) |
GB (1) | GB2129030B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706332A1 (en) * | 1987-02-27 | 1988-09-08 | Ludwig Pawelski | Clamping connection having identical components |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3611892A1 (en) * | 1986-04-09 | 1987-10-15 | Peiner Umformtechnik Gmbh | CLAMP CONNECTION |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB739164A (en) * | 1951-11-17 | 1955-10-26 | Margot Von Linsingen T A Bochu | Improvements in or relating to flexible clamping devices for mine roof and like supports |
GB774575A (en) * | 1952-10-31 | 1957-05-15 | Arnold Haarmann | Improvements in or relating to drift support systems for mines |
GB784140A (en) * | 1953-06-10 | 1957-10-02 | Margot Von Linsingen | Improvements in or relating to arched mine gallery supporting structures |
GB785743A (en) * | 1954-12-30 | 1957-11-06 | Forges Et Ateliers De La Nave | Improvements in or relating to mine roof supports |
GB792149A (en) * | 1954-02-05 | 1958-03-19 | Margot Von Linsingen | Improvements in mine roof supports and the like |
GB795053A (en) * | 1954-05-14 | 1958-05-14 | Bergbaustahl Gmbh & Co | Connecting device for lagging irons for mines |
GB805346A (en) * | 1956-01-04 | 1958-12-03 | Bergbaustahl Gmbh & Co | Clamping means for sliding arch support frames for mines |
GB809603A (en) * | 1955-01-25 | 1959-02-25 | Margot Von Linsingen | Yielding coupling for inter-nesting profile irons of channel section, for example in mining structures |
GB821671A (en) * | 1956-03-09 | 1959-10-14 | Margot Von Linsingen | Improvements in mine roof supports and the like |
GB850677A (en) * | 1958-05-03 | 1960-10-05 | Usinor | Improvements in and relating to support members and applications thereof in particular in mine framing |
GB851682A (en) * | 1959-02-09 | 1960-10-19 | Forges Et Ateliers De La Nave | A cross-bar for the slidable assembly of associated members of roof supports |
GB860706A (en) * | 1958-11-03 | 1961-02-08 | Applic Scient Tech Ind Et Comm | Improvements in or relating to mine roof supports |
GB932789A (en) * | 1958-09-20 | 1963-07-31 | Margot Von Linsingen | Improvements in or relating to trough-shaped support sections particularly for sliding arch mine roof supports |
GB961723A (en) * | 1959-10-16 | 1964-06-24 | Applic Scient Tech Ind Et Comm | Improvements in retaining frames for underground passages |
GB1011821A (en) * | 1961-07-26 | 1965-12-01 | Margot Von Linsingen | Mine-roof yielding support joint |
GB1142366A (en) * | 1965-08-23 | 1969-02-05 | Biura P Przemyslu Weglowego B | Ogival arch support for a mine roadway |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB493036A (en) * | 1938-05-30 | 1938-09-30 | Ferdinand Richards | Improvements in or relating to mine arches and their connections |
DE866932C (en) * | 1948-12-28 | 1953-03-02 | Arnold Dr-Ing Haarmann | Route expansion |
FR1081646A (en) * | 1952-07-29 | 1954-12-21 | Improvements to support systems for mine galleries | |
FR1102027A (en) * | 1953-06-10 | 1955-10-13 | Bochumer Eisen Heintzmann | Improvements made to sliding support frames for mining installations |
DE1020589B (en) * | 1956-03-09 | 1957-12-12 | Bochumer Eisen Heintzmann | Flexible connection for flanged gutter profiles in the same direction |
FR1246343A (en) * | 1959-10-09 | 1960-11-18 | Bochumer Eisenhu Tte Heintzman | Improvements made to sliding support frames with threaded stirrup connection devices |
FR1544666A (en) * | 1967-03-21 | 1968-11-08 | & Rech S Ind & Scient E R I S | Bracket for assembly device for retaining frames |
US4018054A (en) * | 1975-11-06 | 1977-04-19 | Armco Steel Corporation | Yieldable joint |
DE2602209C3 (en) * | 1976-01-22 | 1978-08-10 | Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum | Clamp connection for channel profile segments |
DE2621361C3 (en) * | 1976-05-14 | 1980-05-29 | Ruhrkohle Ag, 4300 Essen | Extension of the line for mining and tunneling |
DE2724891C3 (en) * | 1977-06-02 | 1980-05-29 | Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum | Multi-part clamp connection |
DE7800026U1 (en) * | 1978-01-02 | 1978-05-18 | Hoesch Werke Ag, 4600 Dortmund | TENSIONING CONNECTION FOR INTERESTED, SLIDING CHANNEL PROFILES |
EP0046818B1 (en) * | 1980-09-02 | 1984-07-18 | GTG Gesteins- und Tiefbau GmbH | Sliding clamping assembly for mine roof support arches |
-
1982
- 1982-10-23 DE DE19823239343 patent/DE3239343C2/en not_active Expired
-
1983
- 1983-10-11 GB GB08327166A patent/GB2129030B/en not_active Expired
- 1983-10-14 FR FR8316359A patent/FR2534965B1/en not_active Expired
- 1983-10-21 BE BE6/47889A patent/BE898064A/en not_active IP Right Cessation
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB739164A (en) * | 1951-11-17 | 1955-10-26 | Margot Von Linsingen T A Bochu | Improvements in or relating to flexible clamping devices for mine roof and like supports |
GB774575A (en) * | 1952-10-31 | 1957-05-15 | Arnold Haarmann | Improvements in or relating to drift support systems for mines |
GB784140A (en) * | 1953-06-10 | 1957-10-02 | Margot Von Linsingen | Improvements in or relating to arched mine gallery supporting structures |
GB792149A (en) * | 1954-02-05 | 1958-03-19 | Margot Von Linsingen | Improvements in mine roof supports and the like |
GB795053A (en) * | 1954-05-14 | 1958-05-14 | Bergbaustahl Gmbh & Co | Connecting device for lagging irons for mines |
GB785743A (en) * | 1954-12-30 | 1957-11-06 | Forges Et Ateliers De La Nave | Improvements in or relating to mine roof supports |
GB809603A (en) * | 1955-01-25 | 1959-02-25 | Margot Von Linsingen | Yielding coupling for inter-nesting profile irons of channel section, for example in mining structures |
GB805346A (en) * | 1956-01-04 | 1958-12-03 | Bergbaustahl Gmbh & Co | Clamping means for sliding arch support frames for mines |
GB821671A (en) * | 1956-03-09 | 1959-10-14 | Margot Von Linsingen | Improvements in mine roof supports and the like |
GB850677A (en) * | 1958-05-03 | 1960-10-05 | Usinor | Improvements in and relating to support members and applications thereof in particular in mine framing |
GB932789A (en) * | 1958-09-20 | 1963-07-31 | Margot Von Linsingen | Improvements in or relating to trough-shaped support sections particularly for sliding arch mine roof supports |
GB860706A (en) * | 1958-11-03 | 1961-02-08 | Applic Scient Tech Ind Et Comm | Improvements in or relating to mine roof supports |
GB851682A (en) * | 1959-02-09 | 1960-10-19 | Forges Et Ateliers De La Nave | A cross-bar for the slidable assembly of associated members of roof supports |
GB961723A (en) * | 1959-10-16 | 1964-06-24 | Applic Scient Tech Ind Et Comm | Improvements in retaining frames for underground passages |
GB1011821A (en) * | 1961-07-26 | 1965-12-01 | Margot Von Linsingen | Mine-roof yielding support joint |
GB1142366A (en) * | 1965-08-23 | 1969-02-05 | Biura P Przemyslu Weglowego B | Ogival arch support for a mine roadway |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706332A1 (en) * | 1987-02-27 | 1988-09-08 | Ludwig Pawelski | Clamping connection having identical components |
Also Published As
Publication number | Publication date |
---|---|
FR2534965B1 (en) | 1986-05-09 |
DE3239343C2 (en) | 1986-01-23 |
DE3239343A1 (en) | 1984-04-26 |
GB2129030B (en) | 1986-03-19 |
FR2534965A1 (en) | 1984-04-27 |
BE898064A (en) | 1984-02-15 |
GB8327166D0 (en) | 1983-11-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3486726A (en) | Universal pipe clamp | |
US5020749A (en) | Band element for binding and holding of objects | |
AU658464B2 (en) | Pipe coupling | |
US3301514A (en) | Clips for conduits or pipes | |
US2998629A (en) | Pipe clamp | |
US4767087A (en) | Pipe clamp for the rocking or rigid suspension of pipes | |
DE3274275D1 (en) | Arched connecting element between two rectilinear portions of a tensional cable | |
GB2143294B (en) | Self-adjusting pipe clamp and coupling | |
JP2016528444A (en) | Tensioning or pipe clamp | |
US2944314A (en) | Tangential hose clamp | |
RU2020123780A (en) | IMPROVED CLAMP FOR INSTALLING CABLES ON SUPPORT ELEMENT | |
GB2129030A (en) | Mine roof support clamp | |
US2825113A (en) | Hose clamp | |
BG64407B1 (en) | Clamp with a fixed end | |
US3555752A (en) | Mounting arrangement for a skylight | |
US3762743A (en) | Pipe drill clip | |
NO20010453D0 (en) | Single piece part to form a cable anchor claw, and method of making such a claw | |
US3025089A (en) | Clamps for tubular structures | |
US3584352A (en) | Pipe clamp with bridge bolt | |
US3520564A (en) | Clamp for pipes and the like | |
US3211276A (en) | Conveyor apparatus | |
CN105422141B (en) | A kind of waterstop fixture | |
SU796437A1 (en) | Roof support reinforcement of special-section stock | |
US2613964A (en) | Clamp | |
GB2095718A (en) | Struts for mine roadway supports |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |