CA1070075A - Connector for bolted joints - Google Patents
Connector for bolted jointsInfo
- Publication number
- CA1070075A CA1070075A CA295,103A CA295103A CA1070075A CA 1070075 A CA1070075 A CA 1070075A CA 295103 A CA295103 A CA 295103A CA 1070075 A CA1070075 A CA 1070075A
- Authority
- CA
- Canada
- Prior art keywords
- connector
- channel
- base
- key
- bore
- 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.)
- Expired
Links
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/07—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of multiple interengaging protrusions on the surfaces, e.g. hooks, coils
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Joining Of Building Structures In Genera (AREA)
- Connection Of Plates (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A connector for a bolted joint mounted or adapted to be mounted on a member to be connected and comprising a base portion and a key portion. Opposed faces of the connector define a channel, the key portion being of complementary shape to the channel so that the connector can be coupled to another similar connector with each of the key portions received in the channel of the other connector. A bore for receiving a bolt extends through the connector and is positioned to register with a bore of a similar connector when the connectors are coupled together.
A connector for a bolted joint mounted or adapted to be mounted on a member to be connected and comprising a base portion and a key portion. Opposed faces of the connector define a channel, the key portion being of complementary shape to the channel so that the connector can be coupled to another similar connector with each of the key portions received in the channel of the other connector. A bore for receiving a bolt extends through the connector and is positioned to register with a bore of a similar connector when the connectors are coupled together.
Description
~07~S
This invention relates to connectors for bolted ~oints~ par-ticularly for bolted joints whi.ch may be subjected to high stress~
es, for example the joints of mine roo~ support~
Roof supports in underground mine roadways or tunnels are usually composed of steel beams of L~, T~ or I~ cross section and may be of any desired shape, semi~circular, arched, or rectangu~
lar. The limited space available in an underground excavation creates difficulties in transporting, erecting and handling roof supports, and necessitates the manufacture of the roof supports in relativelyshort sectionswhich are assembled in the mine.
Usually the steel beam sections are fastened together by means of fishplates,i.e drilled plates of sheet steel which are bolted to adjacentsections ofthe roof supports. Since four or more bolts are usually required~or each fishplate,the assembly of the roof supports is laborious and slow.
According to the present invention there is provided a connec-tor for a bolted joint adapted to be mounted on amemberto ke con-nected to anothermember, the connector com~risesa base po:rtion,an intermediate portion and a key portion;opposed facesof the base and 20 key portion being inclinedand defining a channelwhich taperscon-vergin~ly towardsits base, whichis provided by the intermediate .
portion, theopposing facesof thebase and keyportion also being disposed at an angle to eachother so that thechannel tapersalong its length, the keyportion being of complementaryshape to the .
channel so that the connector can be clamped to another similar ; connector with each of the key portionsreceived in the channel of the other connector, and wherein the connector has a bore : .
therein for receivin~ a bolt extending through the connector and positioned to register with a bore of a similar connector when the connectors are clamped together by the bolt.
In use, two of the connectors are coupled together with
This invention relates to connectors for bolted ~oints~ par-ticularly for bolted joints whi.ch may be subjected to high stress~
es, for example the joints of mine roo~ support~
Roof supports in underground mine roadways or tunnels are usually composed of steel beams of L~, T~ or I~ cross section and may be of any desired shape, semi~circular, arched, or rectangu~
lar. The limited space available in an underground excavation creates difficulties in transporting, erecting and handling roof supports, and necessitates the manufacture of the roof supports in relativelyshort sectionswhich are assembled in the mine.
Usually the steel beam sections are fastened together by means of fishplates,i.e drilled plates of sheet steel which are bolted to adjacentsections ofthe roof supports. Since four or more bolts are usually required~or each fishplate,the assembly of the roof supports is laborious and slow.
According to the present invention there is provided a connec-tor for a bolted joint adapted to be mounted on amemberto ke con-nected to anothermember, the connector com~risesa base po:rtion,an intermediate portion and a key portion;opposed facesof the base and 20 key portion being inclinedand defining a channelwhich taperscon-vergin~ly towardsits base, whichis provided by the intermediate .
portion, theopposing facesof thebase and keyportion also being disposed at an angle to eachother so that thechannel tapersalong its length, the keyportion being of complementaryshape to the .
channel so that the connector can be clamped to another similar ; connector with each of the key portionsreceived in the channel of the other connector, and wherein the connector has a bore : .
therein for receivin~ a bolt extending through the connector and positioned to register with a bore of a similar connector when the connectors are clamped together by the bolt.
In use, two of the connectors are coupled together with
2 - ~ :
~7~6~7~ii their respective key portions received in the channel of the other connector. As a result, relative movement of the connec tors transversely to the channels, i.e. substantially normally to the opposed faces o~ the wall portions, is prevented. ~
threaded bolt is then passed throu~h the a]igned bores o~ the connections and the two connectors are then secured together by a nut on the bolt, thus preventing the ~ey portions of each connectors from disengaging from the channel of the other connector.
Since movement of the connectors in a direction transverse to the channel is preven-ted by engagement of the key portions in the channels, any stress which is applied to the joint in this transverse direction is carried by the connectors and not by the bolt. The risk o~ fracture of the bolt is therefore minimised.
The connectors may be formed integrally with the members to be joined. Preferably however the connectors are formed as separate units for attachment to the members to be joined. Where the members to be joined are steel beams, the connectors are suitably at-tached to the beams by welding.
Preferably the opposed faces of the key portions are inclined so that the channel tapers towards its base. On ass-embly the two connectors then become firmly wedged together.
The base and key portions of the connector may extend parallel with each other, thus forming a straight connection between two members. If it is ~esired to connect together two members at an angle to each other, the base and key portions are disposed at an angle to each other so that the channel tapers along its length.
Although the connectors may be provided with more than one bol~ hole, this requires a plurallty o~ nuts an~ bolts
~7~6~7~ii their respective key portions received in the channel of the other connector. As a result, relative movement of the connec tors transversely to the channels, i.e. substantially normally to the opposed faces o~ the wall portions, is prevented. ~
threaded bolt is then passed throu~h the a]igned bores o~ the connections and the two connectors are then secured together by a nut on the bolt, thus preventing the ~ey portions of each connectors from disengaging from the channel of the other connector.
Since movement of the connectors in a direction transverse to the channel is preven-ted by engagement of the key portions in the channels, any stress which is applied to the joint in this transverse direction is carried by the connectors and not by the bolt. The risk o~ fracture of the bolt is therefore minimised.
The connectors may be formed integrally with the members to be joined. Preferably however the connectors are formed as separate units for attachment to the members to be joined. Where the members to be joined are steel beams, the connectors are suitably at-tached to the beams by welding.
Preferably the opposed faces of the key portions are inclined so that the channel tapers towards its base. On ass-embly the two connectors then become firmly wedged together.
The base and key portions of the connector may extend parallel with each other, thus forming a straight connection between two members. If it is ~esired to connect together two members at an angle to each other, the base and key portions are disposed at an angle to each other so that the channel tapers along its length.
Although the connectors may be provided with more than one bol~ hole, this requires a plurallty o~ nuts an~ bolts
- 3 ~
"' ~07~375 for assembly. Preferabl~ each connector includes a single bolt hole~ The bolt hole usually extends parallel to the oppos, ed faces of the base and key, i.e. upwardly through the base of the channel.
In order that the invention may be better understood, an embodiment thereof will now be described, by way of example only, with reference to the drawings in which;~
Figure l is a perspective view of a preferred coupling assembly Figure 2 is a plan view of a connector incorporated in the assembly of Figure l and Figure 3 is an elevation of the connector o~ Figure 2.
Referring to the drawings, the coupling assembly comprises two identical connectors l, 2, each of which comprises a rectan-gular base portion 3, 3' connected to a key portion 5, 51 by an intermediate wall 7, 71, In each connector, opposed faces 8, 8', 9, 9' of the key 5, 5' and the base 3, 31 define a channel lO, lO'. These faces 8, 8', 9, 9' converge towards the bases of the channels lO, lO~. In the embodiment illustrated, the opposed faces of the bases 3, 3' and keys 5, 5' also converge towards each other along the length of the channels lO, lO' so that the channels lO, lO' taper towards one end.
The keys 5 ! 5' are complementary in shape to the channels lO, lO' so that the two connectors l, 2 can be coupled together, the key 5, 5' oE each connector belng received in the channel lO, lO' of the other connector. The convergence of the opposed faces 8, 8', 9, 9' of the channel lO, lO' ensures that each key 5, 5' is a snug fit in -the channel lO, lO' of the other connector.
A bore ll, ll' extends through e~ch of the connectors l, 2. This bore comprises a hole 12, 121 in ~he intermediate ~ 4 ~
wall 7, 7' and a semi-cylindr~c~l recess in the face 8 r 8 ~ 0~
the key defining the channel 10, 10~. The bores 11 r 111 extend downwardly towards the base of the channels 10, 10' generally parallel to the planes of the opposed faces 8~ 81 ~ 9~ 9' of the keys 5, 5' and bases 3, 3' and are arranged cen-trally along the length of the keys 7, 7' so that the two bores are aligned when the connectors are joined together. A threaded bolt 14 can then be inserted through the aligned bores 11, 11l and the two con-nectors can be secured together on the bolt 14 by a nut 15.
In use, the connectors 1, 2 can be butt~welded onto the ends o two members to be connected, for example two lengths of I-section steel beam which make up part of a mine roof suppor-t. Alternatively they can be attached to flange faces of gird~rs, tees etc, as desired. The sections can then be jointed together in situ by inserting the keys 5, 5' of each connector into the channels 10, 10' of the other connector.
The bolt 14 is then inserted through the bores 11, 11' and is secured in place by tightening the nut 15.
The two lengths of steel beam are therefore coupled to-gether using a single bolt, which greatly facilitates assembly.
When the complete roof support is assembled, compressive forces exerted on the connection along the lengths of the beams are ahsorbed by the abutting faces 8, 8l, 9, 9' of the keys and bases, and are not transmitted to the bolt 14. Moreover~ the relative configuration of the two connectors is determined by the relative angles of the bases 4, 5 and keys 5, 5'. Consequent-ly ~he connections move into the desired configur~tlon on tight-ening the nut 15.
It will be appreciated that the couplin~ lllustrated in the drawings allows two lengths of heam to be connected to each _ 5 ~
3L~7C~75 other at an angle determined by the mutual angle of inclination of the keys 5, 5` and bases 3, 3'~
If it is desired to connect two beams to~ether at a diff~
erent angle -to each other, or collinearly, it is necessary to use connectors in which the bases and keys are either mutually inclined at different angles or parallel to each other.
The connectors are preferably manufactured by casting or by forging. In either case they are conveniently manufactured in pairs, in "back-to-back" configuration~ i.e. with the two bases 3, 3' fused along their faces remote from the channel 10, 10'. The two connectors are then separated by sawing to reveal a freshly cut face which is very sultable for welding to I-section beams, as indicated in broken lines in Figures 2 and 3.
~ 6
"' ~07~375 for assembly. Preferabl~ each connector includes a single bolt hole~ The bolt hole usually extends parallel to the oppos, ed faces of the base and key, i.e. upwardly through the base of the channel.
In order that the invention may be better understood, an embodiment thereof will now be described, by way of example only, with reference to the drawings in which;~
Figure l is a perspective view of a preferred coupling assembly Figure 2 is a plan view of a connector incorporated in the assembly of Figure l and Figure 3 is an elevation of the connector o~ Figure 2.
Referring to the drawings, the coupling assembly comprises two identical connectors l, 2, each of which comprises a rectan-gular base portion 3, 3' connected to a key portion 5, 51 by an intermediate wall 7, 71, In each connector, opposed faces 8, 8', 9, 9' of the key 5, 5' and the base 3, 31 define a channel lO, lO'. These faces 8, 8', 9, 9' converge towards the bases of the channels lO, lO~. In the embodiment illustrated, the opposed faces of the bases 3, 3' and keys 5, 5' also converge towards each other along the length of the channels lO, lO' so that the channels lO, lO' taper towards one end.
The keys 5 ! 5' are complementary in shape to the channels lO, lO' so that the two connectors l, 2 can be coupled together, the key 5, 5' oE each connector belng received in the channel lO, lO' of the other connector. The convergence of the opposed faces 8, 8', 9, 9' of the channel lO, lO' ensures that each key 5, 5' is a snug fit in -the channel lO, lO' of the other connector.
A bore ll, ll' extends through e~ch of the connectors l, 2. This bore comprises a hole 12, 121 in ~he intermediate ~ 4 ~
wall 7, 7' and a semi-cylindr~c~l recess in the face 8 r 8 ~ 0~
the key defining the channel 10, 10~. The bores 11 r 111 extend downwardly towards the base of the channels 10, 10' generally parallel to the planes of the opposed faces 8~ 81 ~ 9~ 9' of the keys 5, 5' and bases 3, 3' and are arranged cen-trally along the length of the keys 7, 7' so that the two bores are aligned when the connectors are joined together. A threaded bolt 14 can then be inserted through the aligned bores 11, 11l and the two con-nectors can be secured together on the bolt 14 by a nut 15.
In use, the connectors 1, 2 can be butt~welded onto the ends o two members to be connected, for example two lengths of I-section steel beam which make up part of a mine roof suppor-t. Alternatively they can be attached to flange faces of gird~rs, tees etc, as desired. The sections can then be jointed together in situ by inserting the keys 5, 5' of each connector into the channels 10, 10' of the other connector.
The bolt 14 is then inserted through the bores 11, 11' and is secured in place by tightening the nut 15.
The two lengths of steel beam are therefore coupled to-gether using a single bolt, which greatly facilitates assembly.
When the complete roof support is assembled, compressive forces exerted on the connection along the lengths of the beams are ahsorbed by the abutting faces 8, 8l, 9, 9' of the keys and bases, and are not transmitted to the bolt 14. Moreover~ the relative configuration of the two connectors is determined by the relative angles of the bases 4, 5 and keys 5, 5'. Consequent-ly ~he connections move into the desired configur~tlon on tight-ening the nut 15.
It will be appreciated that the couplin~ lllustrated in the drawings allows two lengths of heam to be connected to each _ 5 ~
3L~7C~75 other at an angle determined by the mutual angle of inclination of the keys 5, 5` and bases 3, 3'~
If it is desired to connect two beams to~ether at a diff~
erent angle -to each other, or collinearly, it is necessary to use connectors in which the bases and keys are either mutually inclined at different angles or parallel to each other.
The connectors are preferably manufactured by casting or by forging. In either case they are conveniently manufactured in pairs, in "back-to-back" configuration~ i.e. with the two bases 3, 3' fused along their faces remote from the channel 10, 10'. The two connectors are then separated by sawing to reveal a freshly cut face which is very sultable for welding to I-section beams, as indicated in broken lines in Figures 2 and 3.
~ 6
Claims (7)
1. A connector for a bolted joint adapted to be mounted on a member to be connected to another member, the connector comprising:
a base portion, an intermediate portion and a key portion;
opposed faces of said base and key portion being inclined and defining a channel which tapers convergingly towards its base, which is provided by said intermediate portion, said opposing faces of said base and key portion also being disposed at an angle to each other so that the channel tapers along its length, said key portion being of complementary shape to said channel so that said connector can be clamped to another similar connector with each of said key portions received in the channel of the other connector, and wherein said connector has a bore therein for receiving a bolt extending through the connector and position-ed to register with a bore of a similar connector when the connec-tors are clamped together by said bolt.
a base portion, an intermediate portion and a key portion;
opposed faces of said base and key portion being inclined and defining a channel which tapers convergingly towards its base, which is provided by said intermediate portion, said opposing faces of said base and key portion also being disposed at an angle to each other so that the channel tapers along its length, said key portion being of complementary shape to said channel so that said connector can be clamped to another similar connector with each of said key portions received in the channel of the other connector, and wherein said connector has a bore therein for receiving a bolt extending through the connector and position-ed to register with a bore of a similar connector when the connec-tors are clamped together by said bolt.
2. A connector according to claim 1 having a single bore.
3. A connector according to claim 1 or 2 wherein the bore extends parallel to the opposed faces of said base portion and said key portion.
4. A connector for a bolted joint adapted to be mounted on a member to be connected to another member, said connector com-prising a base portion, an intermediate portion and a key portion, opposed faces of said base and key portions being so inclined as to define a channel which tapers convergingly toward its base and tapers along its length, said base being provided by said intermediate portion, said key portion being complementary to said channel so that said connector can be clamped to another similar connector with the key portion of each connector receiv-ed in the channel of the other connector, and including a single bore extending through said connector with its longitudinal axis extending generally at right angles to the base of said channel, said bore being positioned to register with a bore of a similar connector when the connectors are clamped together by a bolt extending through the bores.
5. A connector according to claim 4 wherein the bore in-cludes a hole in said intermediate portion and a semicircular recess in the face of said key defining said channel.
6. A connector according to claim 4 or 5 wherein both the face of said base and the face of said key are inclined and form an obtuse angle with the base of said channel.
7. A connector according to claim 4 or 5 wherein the taper of said channel along its length defines two distinct differently tapered channel portions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB549177A GB1591411A (en) | 1977-02-10 | 1977-02-10 | Connector for bolted joints |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070075A true CA1070075A (en) | 1980-01-22 |
Family
ID=9797204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA295,103A Expired CA1070075A (en) | 1977-02-10 | 1978-01-17 | Connector for bolted joints |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1070075A (en) |
| GB (1) | GB1591411A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2158178A (en) * | 1984-04-28 | 1985-11-06 | Ambassador Carports Limited | Car port or like structure |
| GB8620582D0 (en) * | 1986-08-23 | 1986-10-01 | British Steel Corp | Steelwork joints |
-
1977
- 1977-02-10 GB GB549177A patent/GB1591411A/en not_active Expired
-
1978
- 1978-01-17 CA CA295,103A patent/CA1070075A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1591411A (en) | 1981-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |