CA2113452A1 - Anchorage device - Google Patents
Anchorage deviceInfo
- Publication number
- CA2113452A1 CA2113452A1 CA002113452A CA2113452A CA2113452A1 CA 2113452 A1 CA2113452 A1 CA 2113452A1 CA 002113452 A CA002113452 A CA 002113452A CA 2113452 A CA2113452 A CA 2113452A CA 2113452 A1 CA2113452 A1 CA 2113452A1
- Authority
- CA
- Canada
- Prior art keywords
- anchorage device
- anchorage
- clamp
- elements
- recesses
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
Abstract
This invention relates to an anchorage device for use in anchoring a member to a structure, the device comprising at least two elongate rigid elements (12, 14) for independent insertion into respective divergent recesses (32, 34) formed in the structure, and holding (18) means for detachably holding the said elements at a position externally of the recesses whereby the rigid elements (12, 14) are anchored in their respective recesses (32, 34) in a divergent state. The anchorage device of the invention may be used in particular for anchoring scaffolding to a building.
Description
W093/02263 PCT/G~92/01297 ANCHORAGE D~VICE
2113~52 This invention relates to an anchorage device and is particularly, though not exclusively, concerned with an anchorage device for u~e in anchoring a memb~r ~uch as scaffolding, or a scaffold tower, or a ladder to a structure such as a wall of a building.
Scaffolding and scaffold towers are usually rigidly anchored to building~ for safety rea~ons by means of drilled-in anchor ties. Such anchor ties compri~e a ring having a threaded shank which is screwed into a threaded expansion ~leeve inserted into a pre-drilled hole in the wall. Such anchor ties have ~everal disadvantages. First, the ties are relatively expensive and a special punch is required to fit and expand the sleeve in the hole. Second, such anchor ties are t ~uitable for fixing to all materials, in particular soft ~tone, for example, Bath stone. Third, ~uch anchor ties require a hole which i8 relatively large (about 20 mm) which often;cannot be satisfactorily repaired once the scaffolding or other nember i~ removed.
- GB;21~25872A and W091/14061 di~close scaffold anchorage devices each comprising a simple spigot pi~otably attached with limited freedom of movement to the scaffold structure, the free nd of the spigot being received, in use, inside a borehole in a wall drilled at at least about lS to a perpendicular to the wall. Several such anchorage devices are used to anchor the scaffolding to the wall the spigot of each device being :, .
~ .
W093/02263 PCTlGBg2/01297 211 ~ ~5 2 2 inserted into upwardly or downwardly extending boreholes.
Whilst the scaffold anchorage devices disclosed in GB2125872 and W091/14061 mitigate some of the di~advantages of the anchor ties described above, at least two such anchorage devices are required to provide a secure anchorage an~ they still require relatively large boreholes to be drilledO Furthermore, whil~t providing a safe anchorage when used correctly, it has been found that unskilled operatives may form boreholes which are sub~tantially perpendicular to the wall whereby the inserted spigot has little or no grip on the wall and therefore the anchorage is less reliable.
It i8 an ob~ect of the present invention to provide an anchorage device which overcomes the di~advantage~ of known anchorage devices, andl in particular, such anchor ties and scaffold anchorage devices.
According to one a~pect of the invention there is provided an anchorage device for use in anchoring a member to a structure, the device comprising at lesst two elongate rigid element~ for independent insertion into respective divergent recesses formed in the structure, and holding means for detachably holding the said elements at a position externally of the reces~es whereby the rigid elements are anchored in their!respective recesses in a divergent state. Thus the ~nchorage device i8 fixed by frictional forces acting on the transverse portions of the elongate elements inserted into the structure which may typically be an exterior wall of a building or a floor. The anchorage device in accordance with the invention overcomes the disadvantages of the prior art anchor 3 2.113~
ties in that it can be manufactured relatively inexpensively and also does not require special tools other than a drill for its use. It can be used in relatively ~oft stone, and re~uires only the drilling of relatively narrow dismeter holes in the structure. ` ~
The anchorage de~ice of the pre~ent invention is al~o advantageous over ~he scaffold anchorage devices disclosed in GB2125872 and W091/14061 in that the elongate rigid elements are held in the correct orientation ~y the holding mean~.
The said portion~ of the entire elongate rigid elelments may be held together. Alternatively the entire elongate rigid elements may be held together.
The said at least two elongate rigid elements may be ~oined ~ogether, Preferably the rigid element~ are flexibly ~oined together. In a preferred embodiment thQ element~ are ~oined by a flexible element such as a wire rope.
The holding means may be in the form of a clamp. The clamps may clamp together portions of the rigid elements.
The, or each, portion may be tran~ver~e to the remainder of the el~ment when in~erted into the structure.
The or each transverse portion of the device may extend at 20 to 70, preferably about 45 to the longitudinal axis of the device. The said portion(s) may be integral with the remainder of the element(s).
~ he anchorage device may comprise three or more such elongate rigid elements.
Preferably, the transverse recesses may be in the form of holes drilled into the structure. According to another 21134S~ 4 aspect of the invention there is provided an insert for in~ertion into a ~tructure for use with an anchorage device, the insert comprising at least o~e transverse rece~s for receiving the elongate rigid element or a portion thereof of the anchorage device.
Anchorage devices in accordance wi~h the invention will now be described, by way of example only, with reference to the accompanying drawings Figures 1 to 6 in which:
Figure 1 is a plan view of a anchorage device in accordance with the invention in a disa~sembled state;
Figure 2 is a partial section through a wall showing the anchorage device of Figure 1 in use;
Figure 3 i~ a plan view of another anchorage device in accordance with the invention in a disas~embled state;
Figure 4 i~ a partial section through another wall showing the anchorage device of Figure 3 in u~e;
Figure 5 i~ a plan view of a further anchorage device in accordance with the insertion in an assembled state; and Figure 6 i8 a plan view of a preferred anchorage device in accordance with ~he invention in a partially disassembled ~tate.
The anchorage de~ice 10 shown in Figures 1 and 2, comprises two lengths of steei bar 12 and 14, (the `'elongate rigid elements"), which are swaged onto either end of a length of f}exible steel rope 16. The lengths of steel bar 12,14, can be fixed to the length of steel wire 16 by other methods, for example, welding or gluing. The anchorage device 10 also includes a steel clamp 18 (the aforesaid "means") which W093/02263 PCT/GB92/0l297 211~2 comprises a U-shaped member 20 having threaded shanks 22,24, which receive correspondingly-threaded nuts 26,28. The nuts 26,28, retain a drilled plate 30 on the shanks 22,24. I~
use, and as shown in Figure 2, relatively narrow diameter holes 32,34, are drilled into the surface 36 of wall 3~ at an angle of preferably between 20 to 40 degrees to axis 39 normal to the surface 36.
The lengths of steel bar 12,14, are inserted into the holes 32 and 34 respectively, as shown in Figure 2, and the clamp 18 iS p7 aced about the lengths of steel bar 12,:14, to clamp them tran~verse to each other at an angle corresponding to thé angle between holes 32,34 when nuts 26,28 are tightened.
The steel wire 16 forms a loop 40. Movement of the anchorage device 10 in the direction of arrow A of Figure 2, that is to say away from the wall 38, is prevented by the frictional forces between the ~ransver~e steel bars 12,14, and the walls 33,35, of the holes 32,34, whilst the lengthæ of steel bar 12,14, are rigidly held in a mutually transverse position by clamp 18. The loop 40 formed by the steel wire may be conveniently formed about the member to be held to the wall 38, for example, ~ scaffold pole (not shown). Alternatively, conventional fixing mean~, for example, a shackle, may be used to hold the member to the loop 400 The anchorage device 70 can ~e removed from the wall 38 by removing clamp 18 and withdrawing lengths o bar 12,14.
~ he anchorage device S0 shown in Figuxes 3 and 4, comprises relatively long, and relatively short length of steel bar, 52 and 54 respectively, to which are swaged rèlatively 2il345~ ;
short and relatively long lengths of steel wire, 56,58, respectively. The lengths of steel bar 52,54, are welded together but might be formed integrally, for example, by casting. To the free ends of lengths of ~teel wire 56,58, are swaged, or otherwise fixed, further lengths ~of steel bar 60,62, respectively. A collar of ~teel tube 64 is free to slide along steel wire 58.
The anchorage device 50 further compri~es a clamp 66 which is similar to clamp 18 shown in Figures 1 and 2 and described earlier save for a cast piece 68, which takes the place of plate 30 in clamp 18, and which is shaped to fit to the steel bar 52 and collar 64.
In use, and as shown in ~igure 4, holes 70 and 72 are formed in wall 74 at an angle of about 20 to 40 degrees to an axis 76 normal to surface ?8 of wall 74. The length of steel bar 60 and 62 are inserted into the holes 70 and 72 as shown, the longer length of steel wire 58 facilitating the insertion of length 62 into hole 72. The clamp 66 is then placed about tbe end of steel bar 52 ad~acent steel wire 56 and the sliding steel collar 64 to clamp rigidly the collar 64 to steel bar 52.
In;~this position, the anchorage device 50 is fixed to the wall 74 by virtue of the frictional forces described above in relation to the Figure 1 and ~igure 2 embodiment. However, the~snchorage device 50 can be readily removed from wall 74 by removal of the clamp 66 followed by removal of the respective lengths of steel bar 60,62, from the holes 70,72. Members, such as ladders or scaffold to be fixed to wall 74, m~y be fixed to the anchorage device 50 by conventional means. The W093/02263 PCT/G~92/01297 7 ~li34~2 flexibility conferred upon the device by the lengths of steel wire S6,58, allows the fastening device to be used even when the angle of drilling of holes 70,72, is not particularly accurate.
Where accurate drilling of holes in a~s~ructure is possible, the anchorage device may comprise at least two lengths of rigid bar or tube as shown in Figure 5. The anchorage device 80 shown in Figure 5 comprises two lengths of steel bar 82,84, which are bent at an angle of 30 degrees to their respective longitudinal axis. The lengths of bar 82,84, can be held together by means of clamp 86, which is similar in operation to clamps 18 and 66 already described, after insertion of their respective ends into corresponding accurately angled holes formed in a structure.
The anchorage device 90 shown in Figure 6 which is in accordance with a preferred embodiment of the invention compri~es two bent lengths of steel bar 92 and ~4 which are swaged onto either end of a length of flexible steel rope 96.
Transversely-extending portions 93,95, of the bars 92,94, extend at about 35 to the longitudinal axis of the anchorage device 90 in u8e. A length of stQel rope 96 pa~e~ through steel tubes 98 and 100 which are welded to steel plate 102.
Platei 102 defines guide holes 104 and 106. A steel ring 108 is al80 welded onto plate 102. The ring 108 is sufficiently wide in internal diametex so as to allow a scaffold pole to pass therethrough.
A clamp 110, comprising upper and lower clamp elements 112 and 114 respectively, is arranged to clamp parallel W093/02263 PCT~GB92/01297 , . .
portions 116 and 118 of steel bars 92 and 94 respectively.
Lower clamp element 114 includes a threaded element 120 which is arranged to extend through aperture 122 defined by upper clamp element 112. In use a nut and spring washers (not shown) screw onto the end of the threaded~ element 120 protruding through aperture 122 to clamp elements 112 and 114 together about portions 116 and 118 of steel bars 92 and 94.
A spacing element in the form of a boss 121 welded onto the lower clamp element 114 keeps the portions 116 and 118 apart as they are clamped by the clamp 110. ~lternatively, a portion of the upper or lower clamp element 112,114, may be deformed to provide a similar spacing element. In order to use the anchorage device 90 to anchor a scaffold pole to a wall the plate 102 is held up against the wall and the wall is marked through guideholes 104,106. A hole is drilled into the wall at each marking at an angle of about 35 using either transver~e portion 93,95 as a guide.
The transver~e portions 93,95 are then inserted into tbe drilled holes leaving the portions 116 and 118 of the bars protruding therefrom. The clamp elements 112 and 114 are then clnmped about the ends 116 and 118 of the steel bars 92,~4, as described above. A scaffold pole can then be inserted into the ring 108 ilnside loop 124 formed by steel rope 96.
It is contemplated that the transverse portions of fastening devices in accordance with the invention may be made relatively thin so as to allow use with less substantial structures than walls and ceilings.
It is anticipated that holes for inserting fastening W093~02263 PCT/GB92/01297 g devices in accordance with the invention maybe provided in new structures by a recessed body forming the holes inserted in the structure during construction. For example, the recessed body may be formed of a plastics material and inserted in the structure, for example, the wall of a hou~e~_duri~g the construction of the hou~e whereby the holes defined by the recesses of the body are open for insertion of a fastening device of the invention. Alternatively, and in a preferred embodiment, the body may be inserted in a cast concrete floor during construction. Such an embodiment may be particularly useful for supporting pipework associated with the floor.
~ he internal surfaces of the holes defined by the body may be textured, preferably ribbed, to provide a key for a resin in~ection about the fastening device sfter insertion of the rigid elements into the holes to fix the fastening device in place.
:; ' :
.:
2113~52 This invention relates to an anchorage device and is particularly, though not exclusively, concerned with an anchorage device for u~e in anchoring a memb~r ~uch as scaffolding, or a scaffold tower, or a ladder to a structure such as a wall of a building.
Scaffolding and scaffold towers are usually rigidly anchored to building~ for safety rea~ons by means of drilled-in anchor ties. Such anchor ties compri~e a ring having a threaded shank which is screwed into a threaded expansion ~leeve inserted into a pre-drilled hole in the wall. Such anchor ties have ~everal disadvantages. First, the ties are relatively expensive and a special punch is required to fit and expand the sleeve in the hole. Second, such anchor ties are t ~uitable for fixing to all materials, in particular soft ~tone, for example, Bath stone. Third, ~uch anchor ties require a hole which i8 relatively large (about 20 mm) which often;cannot be satisfactorily repaired once the scaffolding or other nember i~ removed.
- GB;21~25872A and W091/14061 di~close scaffold anchorage devices each comprising a simple spigot pi~otably attached with limited freedom of movement to the scaffold structure, the free nd of the spigot being received, in use, inside a borehole in a wall drilled at at least about lS to a perpendicular to the wall. Several such anchorage devices are used to anchor the scaffolding to the wall the spigot of each device being :, .
~ .
W093/02263 PCTlGBg2/01297 211 ~ ~5 2 2 inserted into upwardly or downwardly extending boreholes.
Whilst the scaffold anchorage devices disclosed in GB2125872 and W091/14061 mitigate some of the di~advantages of the anchor ties described above, at least two such anchorage devices are required to provide a secure anchorage an~ they still require relatively large boreholes to be drilledO Furthermore, whil~t providing a safe anchorage when used correctly, it has been found that unskilled operatives may form boreholes which are sub~tantially perpendicular to the wall whereby the inserted spigot has little or no grip on the wall and therefore the anchorage is less reliable.
It i8 an ob~ect of the present invention to provide an anchorage device which overcomes the di~advantage~ of known anchorage devices, andl in particular, such anchor ties and scaffold anchorage devices.
According to one a~pect of the invention there is provided an anchorage device for use in anchoring a member to a structure, the device comprising at lesst two elongate rigid element~ for independent insertion into respective divergent recesses formed in the structure, and holding means for detachably holding the said elements at a position externally of the reces~es whereby the rigid elements are anchored in their!respective recesses in a divergent state. Thus the ~nchorage device i8 fixed by frictional forces acting on the transverse portions of the elongate elements inserted into the structure which may typically be an exterior wall of a building or a floor. The anchorage device in accordance with the invention overcomes the disadvantages of the prior art anchor 3 2.113~
ties in that it can be manufactured relatively inexpensively and also does not require special tools other than a drill for its use. It can be used in relatively ~oft stone, and re~uires only the drilling of relatively narrow dismeter holes in the structure. ` ~
The anchorage de~ice of the pre~ent invention is al~o advantageous over ~he scaffold anchorage devices disclosed in GB2125872 and W091/14061 in that the elongate rigid elements are held in the correct orientation ~y the holding mean~.
The said portion~ of the entire elongate rigid elelments may be held together. Alternatively the entire elongate rigid elements may be held together.
The said at least two elongate rigid elements may be ~oined ~ogether, Preferably the rigid element~ are flexibly ~oined together. In a preferred embodiment thQ element~ are ~oined by a flexible element such as a wire rope.
The holding means may be in the form of a clamp. The clamps may clamp together portions of the rigid elements.
The, or each, portion may be tran~ver~e to the remainder of the el~ment when in~erted into the structure.
The or each transverse portion of the device may extend at 20 to 70, preferably about 45 to the longitudinal axis of the device. The said portion(s) may be integral with the remainder of the element(s).
~ he anchorage device may comprise three or more such elongate rigid elements.
Preferably, the transverse recesses may be in the form of holes drilled into the structure. According to another 21134S~ 4 aspect of the invention there is provided an insert for in~ertion into a ~tructure for use with an anchorage device, the insert comprising at least o~e transverse rece~s for receiving the elongate rigid element or a portion thereof of the anchorage device.
Anchorage devices in accordance wi~h the invention will now be described, by way of example only, with reference to the accompanying drawings Figures 1 to 6 in which:
Figure 1 is a plan view of a anchorage device in accordance with the invention in a disa~sembled state;
Figure 2 is a partial section through a wall showing the anchorage device of Figure 1 in use;
Figure 3 i~ a plan view of another anchorage device in accordance with the invention in a disas~embled state;
Figure 4 i~ a partial section through another wall showing the anchorage device of Figure 3 in u~e;
Figure 5 i~ a plan view of a further anchorage device in accordance with the insertion in an assembled state; and Figure 6 i8 a plan view of a preferred anchorage device in accordance with ~he invention in a partially disassembled ~tate.
The anchorage de~ice 10 shown in Figures 1 and 2, comprises two lengths of steei bar 12 and 14, (the `'elongate rigid elements"), which are swaged onto either end of a length of f}exible steel rope 16. The lengths of steel bar 12,14, can be fixed to the length of steel wire 16 by other methods, for example, welding or gluing. The anchorage device 10 also includes a steel clamp 18 (the aforesaid "means") which W093/02263 PCT/GB92/0l297 211~2 comprises a U-shaped member 20 having threaded shanks 22,24, which receive correspondingly-threaded nuts 26,28. The nuts 26,28, retain a drilled plate 30 on the shanks 22,24. I~
use, and as shown in Figure 2, relatively narrow diameter holes 32,34, are drilled into the surface 36 of wall 3~ at an angle of preferably between 20 to 40 degrees to axis 39 normal to the surface 36.
The lengths of steel bar 12,14, are inserted into the holes 32 and 34 respectively, as shown in Figure 2, and the clamp 18 iS p7 aced about the lengths of steel bar 12,:14, to clamp them tran~verse to each other at an angle corresponding to thé angle between holes 32,34 when nuts 26,28 are tightened.
The steel wire 16 forms a loop 40. Movement of the anchorage device 10 in the direction of arrow A of Figure 2, that is to say away from the wall 38, is prevented by the frictional forces between the ~ransver~e steel bars 12,14, and the walls 33,35, of the holes 32,34, whilst the lengthæ of steel bar 12,14, are rigidly held in a mutually transverse position by clamp 18. The loop 40 formed by the steel wire may be conveniently formed about the member to be held to the wall 38, for example, ~ scaffold pole (not shown). Alternatively, conventional fixing mean~, for example, a shackle, may be used to hold the member to the loop 400 The anchorage device 70 can ~e removed from the wall 38 by removing clamp 18 and withdrawing lengths o bar 12,14.
~ he anchorage device S0 shown in Figuxes 3 and 4, comprises relatively long, and relatively short length of steel bar, 52 and 54 respectively, to which are swaged rèlatively 2il345~ ;
short and relatively long lengths of steel wire, 56,58, respectively. The lengths of steel bar 52,54, are welded together but might be formed integrally, for example, by casting. To the free ends of lengths of ~teel wire 56,58, are swaged, or otherwise fixed, further lengths ~of steel bar 60,62, respectively. A collar of ~teel tube 64 is free to slide along steel wire 58.
The anchorage device 50 further compri~es a clamp 66 which is similar to clamp 18 shown in Figures 1 and 2 and described earlier save for a cast piece 68, which takes the place of plate 30 in clamp 18, and which is shaped to fit to the steel bar 52 and collar 64.
In use, and as shown in ~igure 4, holes 70 and 72 are formed in wall 74 at an angle of about 20 to 40 degrees to an axis 76 normal to surface ?8 of wall 74. The length of steel bar 60 and 62 are inserted into the holes 70 and 72 as shown, the longer length of steel wire 58 facilitating the insertion of length 62 into hole 72. The clamp 66 is then placed about tbe end of steel bar 52 ad~acent steel wire 56 and the sliding steel collar 64 to clamp rigidly the collar 64 to steel bar 52.
In;~this position, the anchorage device 50 is fixed to the wall 74 by virtue of the frictional forces described above in relation to the Figure 1 and ~igure 2 embodiment. However, the~snchorage device 50 can be readily removed from wall 74 by removal of the clamp 66 followed by removal of the respective lengths of steel bar 60,62, from the holes 70,72. Members, such as ladders or scaffold to be fixed to wall 74, m~y be fixed to the anchorage device 50 by conventional means. The W093/02263 PCT/G~92/01297 7 ~li34~2 flexibility conferred upon the device by the lengths of steel wire S6,58, allows the fastening device to be used even when the angle of drilling of holes 70,72, is not particularly accurate.
Where accurate drilling of holes in a~s~ructure is possible, the anchorage device may comprise at least two lengths of rigid bar or tube as shown in Figure 5. The anchorage device 80 shown in Figure 5 comprises two lengths of steel bar 82,84, which are bent at an angle of 30 degrees to their respective longitudinal axis. The lengths of bar 82,84, can be held together by means of clamp 86, which is similar in operation to clamps 18 and 66 already described, after insertion of their respective ends into corresponding accurately angled holes formed in a structure.
The anchorage device 90 shown in Figure 6 which is in accordance with a preferred embodiment of the invention compri~es two bent lengths of steel bar 92 and ~4 which are swaged onto either end of a length of flexible steel rope 96.
Transversely-extending portions 93,95, of the bars 92,94, extend at about 35 to the longitudinal axis of the anchorage device 90 in u8e. A length of stQel rope 96 pa~e~ through steel tubes 98 and 100 which are welded to steel plate 102.
Platei 102 defines guide holes 104 and 106. A steel ring 108 is al80 welded onto plate 102. The ring 108 is sufficiently wide in internal diametex so as to allow a scaffold pole to pass therethrough.
A clamp 110, comprising upper and lower clamp elements 112 and 114 respectively, is arranged to clamp parallel W093/02263 PCT~GB92/01297 , . .
portions 116 and 118 of steel bars 92 and 94 respectively.
Lower clamp element 114 includes a threaded element 120 which is arranged to extend through aperture 122 defined by upper clamp element 112. In use a nut and spring washers (not shown) screw onto the end of the threaded~ element 120 protruding through aperture 122 to clamp elements 112 and 114 together about portions 116 and 118 of steel bars 92 and 94.
A spacing element in the form of a boss 121 welded onto the lower clamp element 114 keeps the portions 116 and 118 apart as they are clamped by the clamp 110. ~lternatively, a portion of the upper or lower clamp element 112,114, may be deformed to provide a similar spacing element. In order to use the anchorage device 90 to anchor a scaffold pole to a wall the plate 102 is held up against the wall and the wall is marked through guideholes 104,106. A hole is drilled into the wall at each marking at an angle of about 35 using either transver~e portion 93,95 as a guide.
The transver~e portions 93,95 are then inserted into tbe drilled holes leaving the portions 116 and 118 of the bars protruding therefrom. The clamp elements 112 and 114 are then clnmped about the ends 116 and 118 of the steel bars 92,~4, as described above. A scaffold pole can then be inserted into the ring 108 ilnside loop 124 formed by steel rope 96.
It is contemplated that the transverse portions of fastening devices in accordance with the invention may be made relatively thin so as to allow use with less substantial structures than walls and ceilings.
It is anticipated that holes for inserting fastening W093~02263 PCT/GB92/01297 g devices in accordance with the invention maybe provided in new structures by a recessed body forming the holes inserted in the structure during construction. For example, the recessed body may be formed of a plastics material and inserted in the structure, for example, the wall of a hou~e~_duri~g the construction of the hou~e whereby the holes defined by the recesses of the body are open for insertion of a fastening device of the invention. Alternatively, and in a preferred embodiment, the body may be inserted in a cast concrete floor during construction. Such an embodiment may be particularly useful for supporting pipework associated with the floor.
~ he internal surfaces of the holes defined by the body may be textured, preferably ribbed, to provide a key for a resin in~ection about the fastening device sfter insertion of the rigid elements into the holes to fix the fastening device in place.
:; ' :
.:
Claims (13)
1. An anchorage device for use in anchoring a member to a structure, the device comprising at least two elongate rigid elements for independent insertion into respective divergent recesses formed in the structure, and holding means for detachably holding the said elements at a position externally of the recesses whereby the rigid elements are anchored in their respective recesses in a divergent state.
2. An anchorage device according to claim 1, in which the recesses diverge from a substantially common point.
3. An anchorage device according to claim 1 or 2. in which the or each element is formed to have a transversely extending portion.
4. An anchorage device according to claim 3, in which the or each transversely extending portion is/are inserted into the structure.
5. An anchorage device according to Any preceding claim, in which the elements are joined together.
6. An anchorage device according to claim 5, in which the elements are flexibly joined together.
7. An anchorage device according to any preceding claim, in which the holding means is in the form of a clamp.
8. An anchorage device according to claim 7, in which the holding means is arranged to clamp together the elongate rigid elements.
9. An anchorage device according to claim 8, in which the holding means is arranged to clamp together parallel portions of first and second elongate rigid elements.
10. An anchorage device according to any one of claims 1 to 9, in which each parallel portion is integral with a transversely-extending portion.
11. An anchorage device according to any one of claims 3 to 10, in which at least one transversely-extending portion extends at 20 to 70° to the longitudinal axis of the device.
12. An anchorage device according to any preceding claim adapted to engage a scaffold member.
13. An insert for insertion into a structure for use with an anchorage device, the insert comprising at least one transverse recess for receiving the elongate rigid element or a portion thereof of the anchorage device.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB919115256A GB9115256D0 (en) | 1991-07-15 | 1991-07-15 | Fastening device |
| GB9115256.1 | 1991-07-15 | ||
| GB919122625A GB9122625D0 (en) | 1991-10-24 | 1991-10-24 | Fastening device |
| GB9122625.8 | 1991-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2113452A1 true CA2113452A1 (en) | 1993-02-04 |
Family
ID=26299237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002113452A Abandoned CA2113452A1 (en) | 1991-07-15 | 1992-07-15 | Anchorage device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0594720A1 (en) |
| AU (1) | AU2328792A (en) |
| CA (1) | CA2113452A1 (en) |
| WO (1) | WO1993002263A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2009230823B2 (en) * | 2008-12-02 | 2016-08-04 | Illinois Tool Works Inc. | A collar for a concrete lifting anchor |
| US10428536B2 (en) | 2013-12-30 | 2019-10-01 | International Chimney Corporation | Scaffold system |
| DE102016118883A1 (en) * | 2016-10-05 | 2018-04-05 | Georg Weidner | Weldable concrete loop |
| US10935064B2 (en) | 2019-04-19 | 2021-03-02 | Miller Dowel Company | Dowel with directional expanding portion and wall system including directional dowel |
| WO2020223128A1 (en) * | 2019-05-01 | 2020-11-05 | Miller Dowel Company | Transport apparatus for assembly component and method of using transport apparatus |
| WO2020263758A1 (en) | 2019-06-24 | 2020-12-30 | Miller Dowel Company | Guidance apparatus for assembly of construction panels |
| CN111519891A (en) * | 2019-11-25 | 2020-08-11 | 江苏兴厦建设工程集团有限公司 | Anchor ring buckling type rigid outer frame wall connecting piece and construction method thereof |
| EP4097363A4 (en) | 2020-01-27 | 2023-06-21 | Miller Dowel Company | Construction using bundled tube and threaded stepped dowels |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1020105A (en) * | 1950-06-13 | 1953-02-02 | Lifting apparatus and method | |
| DE963814C (en) * | 1953-02-17 | 1957-05-16 | Helmuth Weinforth | Detachable anchorage for attaching scaffolding or the like. |
| FR1480382A (en) * | 1966-04-01 | 1967-05-12 | Lifting method and device | |
| US3582126A (en) * | 1969-09-02 | 1971-06-01 | Bladholm Bros Culvert Co | Concrete pipe-lifting device |
| DE2160575A1 (en) * | 1971-12-07 | 1973-06-14 | Hebel Gasbetonwerk Gmbh | LIFTING DEVICE FOR BODY |
| GB1435689A (en) * | 1972-02-01 | 1976-05-12 | Lecormex Ltd | Device for securing scaffolding to building constructions |
| US4250681A (en) * | 1979-12-10 | 1981-02-17 | Helderman James F | Removable and reusable anchor and method |
-
1992
- 1992-07-15 AU AU23287/92A patent/AU2328792A/en not_active Abandoned
- 1992-07-15 WO PCT/GB1992/001297 patent/WO1993002263A1/en not_active Application Discontinuation
- 1992-07-15 CA CA002113452A patent/CA2113452A1/en not_active Abandoned
- 1992-07-15 EP EP92915426A patent/EP0594720A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0594720A1 (en) | 1994-05-04 |
| WO1993002263A1 (en) | 1993-02-04 |
| AU2328792A (en) | 1993-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |