GB2229219A - Couplers for coupling together two elongate members e.g. scaffolding tubes and component for inclusion therein - Google Patents
Couplers for coupling together two elongate members e.g. scaffolding tubes and component for inclusion therein Download PDFInfo
- Publication number
- GB2229219A GB2229219A GB8906151A GB8906151A GB2229219A GB 2229219 A GB2229219 A GB 2229219A GB 8906151 A GB8906151 A GB 8906151A GB 8906151 A GB8906151 A GB 8906151A GB 2229219 A GB2229219 A GB 2229219A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component
- coupler
- coupling element
- slot
- hole
- 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.)
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Classifications
-
- 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
- E04G7/00—Connections between parts of the scaffold
- E04G7/02—Connections between parts of the scaffold with separate coupling elements
- E04G7/06—Stiff scaffolding clamps for connecting scaffold members of common shape
- E04G7/12—Clamps or clips for crossing members
- E04G7/18—Clamps or clips for crossing members for clamping the members against one another or against a separate cushioning piece between them
-
- 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
- E04G7/00—Connections between parts of the scaffold
- E04G7/02—Connections between parts of the scaffold with separate coupling elements
- E04G7/06—Stiff scaffolding clamps for connecting scaffold members of common shape
- E04G7/12—Clamps or clips for crossing members
- E04G7/14—Clamps or clips for crossing members for clamping the members independently
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- 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
- E04G7/00—Connections between parts of the scaffold
- E04G7/02—Connections between parts of the scaffold with separate coupling elements
- E04G7/06—Stiff scaffolding clamps for connecting scaffold members of common shape
- E04G7/12—Clamps or clips for crossing members
- E04G7/14—Clamps or clips for crossing members for clamping the members independently
- E04G7/16—Clamps or clips for crossing members for clamping the members independently of which the clamping parts for the different members are rotatable with respect to one another
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The component 4 comprises at respective first 11 and second 14 end portions thereof, first and second retaining means for use in retaining the component 4 in a predetermined position in the coupler 1, the component 14 further comprises a portion 13 lying between the said first and second retaining means and having arcuate inner surface, such that that surface can engage with the exterior surface of one of the said elongate members 2 when the coupler 1 is in use; the end portion 14 of the component 4 is in the form of a channel having a base through which there is a hole 9 being the second retaining means, and the hole is surrounded completely by the material forming the said base. The first retaining means may comprise either a slot 8, for engagement by a projection of a coupling element 3 or vice versa in such a way as to inhibit removal of the projection 7 from the slot 8. In use, a nut 5c on a bolt 5a, 5b passing through the hole 9 and a seating portion 10 in the coupling element 3, is tightened so as to draw the coupling element 3 and component 4 together about the elongate members 2 to be coupled. Details of the manufacture of the component 4 from sheet metal are given (see e.g. Figures 4a - 4b) involving stamping and deforming. Figures 5-9 illustrate further development of the coupler with two components and two nut and bolt assemblies. <IMAGE>
Description
COUPLERS FQR COUPLING TOGETHER TWO ELONGATE MEMBERS
AND A COMPONENT FOR INCLUSION THEREIN
The present invention relates to couplers for coupling together two elongate members, for example scaffolding tubes, and a component for inclusion therein.
According to one aspect of the present invention, there is provided a component for inclusion in a coupler for coupling together two elongate members, for example scaffolding tubes, the component being elongate, having an inner surface and an outer surface, and comprising, at respective first and second end portions thereof, first and second retaining means for use in retaining the component in a predetermined position in the said coupler, the said component further comprising a central portion lying between the said first and second retaining means and having a substantially arcuate inner surface, an axis of curvature of which is transverse with respect to the length of the component, such that that surface can engage with the exterior surface of one of the said elongate members when the coupler is in use, the said second end portion of the component being in the form of a channel having a base through which there is q hole, constituting the said second retaining means, and the said hole being surrounded completely by the material forming the said base.
Preferably, there is a slot through the said first end portion, which slot constitutes the said first retaining means.
Alternatively, the said first retaining means may comprise a projection which extends substantially inwardly from the said inner surface of the component at said first end portion thereof.
Preferably, where the first retaining means comprise a slot, between first and second co-planar zones of the said first end portion, which zones extend along and include opposite edges of the component, there lies a region, extending between the said slot and the said central portion, which is inclined at a small angle with respect to the plane of the said first and second zones, in a substantially outward direction with respect to the said outer surface of the component, such that a first end of the region which lies closest to the said slot is furthest from the said plane, the said region being contiguous at a second end thereof, opposite to the said first end, with the said central portion and having its said first end formed by that material of the component which also constitutes part of the periphery of the said slot.
According to another aspect of the present invention, there is provided a coupler for coupling together two elongate members, for example scaffolding tubes, which coupler includes a component according to the above-mentioned one aspect of the present invention and comprises a coupling element having a substantially arcuate portion whose axis of curvature extends in a direction which is transverse to that of the axis of curvature of the arcuate surface of the said central portion of the said component, which substantially arcuate portion of the coupling element can engage with the exterior surface of the other of the said elongate members when the coupler is in use, the coupling element being provided with third retaining means whereby the said component may be retained in a predetermined position with respect to the said coupling element, the said first and third retaining means together constituting a retaining assembly comprising a slot, formed through one of said component and said coupling element, and a projection, formed on the other of said component and said coupling element, which in use extends through the said slot, the said retaining assembly being shaped in such a way as to inhibit removal of the projection from that slot; the coupler further comprising a nut and bolt assembly arranged such that a bolt of that assembly passes through the said hole of the component when the coupler is in use, and the coupling element being provided with a seating portion for receiving the bolt and supporting the head thereof when the coupler is in use.
According to a further aspect of the present invention, there is provided a coupler for coupling together two elongate members, for example scaffolding tubes, which coupler includes two components according to the above-mentioned one aspect of the present invention and comprises a coupling element having a pair of substantially concave surfaces which are connected respectively to corresponding individual ones of the said components, the said concave surfaces of the coupling element each having an axis of curvature which is parallel to the axis of curvature of the arcuate surface of the central portion of the component connected thereto and each being shaped such that those concave surfaces can engage respectively with exterior surfaces of the said elongate members; each concave surface of the coupling element being provided with third retaining means whereby the component corresponding thereto may be retained in a predetermined position with respect to the concave surface concerned, the said first and third retaining means of each mutually-connected component and concave surface together constituting a retaining assembly comprising a slot, formed through one of said component and said concave surface, and a projection, formed on the other of said component and said concave surface, which in use extends through the said slot, each of the said retaining assemblies being shaped in such a way as to inhibit removal of the projection from that slot;; the coupler further comprising a pair of nut and bolt assemblies arranged such that respective bolts of those assemblies pass through the said holes of respective ones of the said components when the coupler is in use, and the coupling element being provided with respective seating portions for receiving respective bolts and supporting respective heads thereof when the coupler is in use.
Preferably, in this case the substantially concave surfaces of the coupling element are arranged in such a way that their respective axes of curvature are transverse with respect to one another.
Alternatively, the substantially concave surfaces are formed by respective substantially arcuate portions of the coupling element which are preferably connected together in such a way as to be pivotable about their mutual point of connection, thereby to enable the inclination of the axis of curvature of one of the said substantially arcuate portions with respect to that of the other of those portions to be adjusted.
Reference will now be made, by way of example, to the accompanying drawings, in which:
Figures 1 and 2 show perspective views of a first coupler embodying the present invention and two scaffolding tubes coupled by it;
Figures 3a and 3d show side elevational views,
Figure 3b shows a front elevational view and Figure 3c a detail of a portion of the first coupler shown in
Figures 1 and 2, the views depicted in Figures 3a, 3c and 3d being taken as indicated by the arrows IIIA,
IIIC and IIID, respectively, in Figure 3b and a further portion of the coupler being shown in chain lines in
Figures 3a and 3b;
Figure 4a shows a plan view of a blank used for making the further portion of the coupler shown in
Figures 1 and 2;
Figure 4b shows an elevational view of one end of the said further portion of the coupler shown in
Figures 1 and 2;;
Figure 4c shows a partial elevational view, taken as indicated by the arrow IVC in Figure 4d, of the said one end;
Figure 4d shows a side elevational view, taken as indicated by the arrow IVD in Figure 4b, of the said further portion of the coupler shown in Figures 1 and 2;
Figures 4e and 4f show views, taken as indicated by the arrow IVE in Figure 4d and the arrow IVF in
Figure 4e, respectively, of the other end of the said further portion of the coupler shown in Figures 1 and 2;
Figures 4g and 4h show perspective views from above of the said further portion of the coupler shown in Figures 1 and 2, Figure 4g showing the said further portion from one side and one end, and Figure 4h showing the said further portion from the other side and the other end thereof;
Figure 4i shows a perspective view from below of the said further portion of the coupler shown in
Figures 1 and 2;;
Figure 4j shows a side elevational view, taken as indicated by the arrow IVJ in Figure 4b, of the said further portion of the coupler in Figures 1 and 2;
Figures 4k and 41 show elevational views, taken as indicated by the arrows IVK and IVL in Figure 4d, respectively, of the said further portion of the coupler shown in Figures 1 and 2;
Figures 5 and 6 show perspective views of a second coupler embodying the present invention and two scaffolding tubes coupled by it;
Figure 7a shows an elevational view of a portion of the coupler shown in Figures 5 and 6 and one of the scaffolding tubes, other parts of the coupler being shown in chain lines;
Figure 7b shows an elevational view, taken as indicated by the arrow VIIB in Figure 7a, of the said portion of the coupler and the other scaffolding tube;;
Figure 7c shows a cross-sectional view, of said portion, taken as indicated by the arrow VIIC in Figure 7d, and the said one of the scaffolding tubes;
Figure 7d shows a plan view of the said portion of the coupler shown in Figures 5 and 6;
Figure 7e shows a plan view of a blank used for making that portion of the coupler shown in Figure 7d;
Figure 8 shows a perspective view of a third coupler embodying the present invention;
Figure 9a shows a front elevational view, partly in section, on a portion of the coupler shown in Figure 8, other parts of the coupler and two scaffolding tubes coupled by it being shown in chain lines;
Figure 9b shows, partly in section, a side elevational view of the said portion, taken as indicated by the arrow IXB in Figure 9a; and
Figure 9c shows a plan view of the said portion, taken as indicated by the arrow IXC in Figure 9a.
The first coupler 1 comprises a coupling element 3, a component comprising a flap 4, and a nut and
T-bolt assembly 5 (the bolt stem 5b thereof and its cross-arm 5a being shown only by dotted lines in Figure 1). The coupling element 3 has a substantially arcuate portion 6 having an internal radius of 24.5mm., i.e.
the arcuate portion 6 is shaped such that it can engage the exterior surface of a scaffolding tube 2 to be coupled. The coupling element 3 is connected to the flap 4 (which will be described below in more detail with reference to Figures 4a to 41) by means of a projection 7 on the coupling element 3 (Figure 2) and the nut and T-bolt assembly 5 which extend respectively through a slot 8 and a hole 9 through the flap 4. Both the slot 8 and the hole 9 are completely surrounded by the material of the flap 4.
In this embodiment, when the coupling element 3 is manufactured the projection 7 is substantially rectangular when viewed as indicated by the arrow K in
Figure 2. During assembly of the coupling element 3, flap 4 and nut and bolt assembly 5 to form the coupler 1, the projection 7 is inserted through the slot 8 in the flap 4 and is then either deformed or built up with additional material in such a way as to inhibit removal of the projection 7 from the slot 8.
The shape and size of the projection 7 and slot 8 are chosen such that the flap 4 is held securely, but loosely, on the coupling element 3 in such a way that when the nut and T-bolt assembly 5 has been released the flap 4 is able to move, preferably to a limited extent, towards and away from the main body of the coupling element 3 about a hinge which is constituted by the projection 7 in the slot 8. To limit the extent of movement of the flap 4 towards and away from the main body of the coupling element 3, the slot 8 is provided along one edge thereof with an abutment 8a (an example of which is described below with reference to
Figures 4a to 4e) which rests against a lower face 7a of the projection 7 when the coupling element 3 and flap 4 are not connected together by the nut and T-bolt assembly 5 (this disposition is not shown).In this way the coupler 1 can support and locate a or each scaffolding tube 2 whilst the coupling element 3 and flap 4 are not connected together by the nut and T-bolt assembly 5, i.e. during the processes of coupling or uncoupling a pair of scaffolding tubes 2.
It should be noted that, whilst in the embodiment described the projection 7 is provided on the coupling element 3 and the slot 8 is provided in the flap 4, the projection 7 and slot 8 could equally well be provided instead on the flap 4 and in the coupling element 3 respectively.
As shown in Figures 1, 3b and 3c, on a side of the coupling element 3 opposite to the projection 7 there is provided a seating portion 10 for receiving the stem 5b of the nut and T-bolt assembly 5 and supporting the cross-arm thereof . The seating portion 10 comprises a pair of somewhat hook-like projections 1Oa spaced apart and defining a recess therebetween in which the stem 5b of the T-bolt is inserted, either from the side or from above, when the coupler 1 is in use. The cross-arm 5a of the T-bolt is inserted into the projections 10a and rests on respective upper surfaces of the projections 10a, which surfaces are preferably curved so as to match the cross-arm 5a of the T-bolt.In use, when the coupler 1 has been placed around the scaffolding tubes 2 to be coupled in such a way that one of the tubes 2 rests on an inner surface of the flap 4, the other tube 2 rests on the said one tube 2 at right angles thereto, and the arcuate portion 6 of the coupling element 3 engages the exterior surface of the said other tube 2, and when the cross-arm Sa of the T-bolt is resting on the projections 10a, the nut Sc on the T-bolt is tightened so as to draw the coupling element 3 and flap 4 closer together, thereby to ensure that the tubes 2 are securely retained within the coupler 1. Since the stem Sb of the T-bolt may be inserted into the recess between the projections 10a from the side, when it is desired to remove the coupler 1 from the tubes 2 it is necessary only to loosen the nut 5c and remove the Tbolt from between the projections 10a by moving the cross-arm 5a thereof upwards slightly and then outwardly. It is therefore possible, if desired, to retain the nut Sc on the stem 5b of the T-bolt throughout the working life of the coupler 1, thereby avoiding the possibility of losing the nut Sc whilst the coupler is not in use.
As shown in Figures 4a to 41, in addition to
Figures 1 to 3c, the flap 4 is elongate and comprises, in the illustrated embodiment, when in a particular orientation and proceeding along the flap 4 from one end to the opposite end: a first portion 11 which is flat and horizontal and has at the extremity thereof remote from the first end of the flap 4 the slot 8 through it substantially midway between the edges of the flap 4; a second portion 12 in which first and second zones 12a,12b extending along and including opposite edges of the flap 4 are joined along their inner sides to a central region 12c between the said zones 12a, 12b which is lower than the said zones 12a, 12b and is inclined to the horizontal by a small angle, the extremity of the central region 12c which is nearer to the slot 8 being lower than the opposite extremity of the central region 12c; a third portion 13 which is arcuate, with an axis of curvature lying above the flap 4 and transverse with respect to its length, and having an internal radius of 24.5mm., i.e. the third portion 13 is shaped so that it can engage the exterior surface of a scaffolding tube; and finally a fourth portions14 which is in the form of a channel the length of which is inclined to the horizontal, the end of the channel remote from the third portion 13 of the flap 4 being higher than the end of the channel nearer the third portion 13, the mouth of the channel being uppermost and the said hole 9 being through the base of the channel. The extremity of the central region 12c which is nearer to the slot 8 forms the above-mentioned abutment 8a for limiting the extent of movement of the flap 4 in relation to the coupling element 3.
Preferably the flap 4 is made of sheet metal and is desirably manufactured by forming, in a single stamping step, an elongate sheet metal blank 15 with (as shown in Figure 4a) the slot 8 and hole 9 through it near first and second opposite ends thereof, respectively, and then deforming the blank 15 so that, in a particular orientation of the deformed blank 15, with two elongate parts 12a, 12b thereof near said first end and including respective long sides of the blank 15 lying horizontally, the metal which previously formed that boundary of the slot 8 which is nearer the hole 9 now constitutes the tip (i.e. the abovementioned abutment 8a) of a strip 12c, between said parts 12a, 12b, projecting downwardly from the remainder of the blank 15 at a small angle to the horizontal, the higher end of the strip 12c being nearer to the hole 9 than is the tip of the strip 12c and the strip 12c being still joined along both sides to said parts 12a, 12b, the material near the second end of the blank 15 now forms an upwardly-open channel 14 with the hole 9 at its base and the material 13 between the channel 14 and the higher end of the strip 12c is arcuate and curves upwardly, proceeding along the deformed blank 15 from the higher end of the strip 12c to the channel 14.
The strip portion 12c of the flap 4 is bent away from the plane of the parts 12a, 12b to facilitate entry of the projection 7 through the slot 8 and additionally to provide the abutment 8a. It should be noted, however, that this bending away of the strip 12c is not essential,if the abutment 8a is provided in some other way or is omitted altogether,and could be omitted if desired. In addition, the strip 12c has been shown in the Figures as still being joined to the elongate zones 12a and 12b, but it should be clear that the strip 12c would still serve the same purpose if it were instead severed from the elongate zones 12a, 12b.
A flap 4 embodying the present invention can also be used in other types of coupler, as will now be described.
As shown in Figures 5, 6 and 7a to 7e, a second coupler 1' embodying the present invention comprises, in addition to a pair of flaps 4 as described above, a coupling element 3' having a pair of substantially concave surfaces 6'. As illustrated in the Figures, there is preferably a hole 3'a (which may be, for example, octagonal in outline as shown) through the coupling element 3' which communicates between the two concave surfaces 6'. The provision of this hole 3'a enables the scaffolding tubes 2 to be brought closer together when the coupler 1' is tightened up, than if there were no such hole 3'a, as a portion 2a of the exterior surface of each scaffolding tube 2 lies within the hole 3'a when the coupler 1' is tightened up, thereby strengthening the coupler 1'.The axis of curvature of each concave surface 6' is parallel to the axis of curvature of the arcuate portion 13 of a corresponding flap 4, and the respective axes of curvature of the said concave surfaces 6' are transverse with respect to one another. The flaps 4 are connected to their corresponding concave surfaces 6' of the coupling element 1 in the same way as in the first coupler 1 described with reference to Figures 1 to 4f.It should be clear from Figures 5, 6 and 7a to 7e, and from the description of the first coupler 1 given above, that two scaffolding tubes 2 may be coupled together by positioning the second coupler 1' in such a way that one of the scaffolding tubes 2 passes between one concave surface 6' of the coupling element 3' and its corresponding flap 4, and the other scaffolding tube 2 passes between the other concave surface 6' of the coupling element 3' and its corresponding flap 4.
A third type of coupler embodying the present invention will now be described with reference to
Figures 8 and 9a to 9c. The third coupler 1" shown in these Figures is similar in shape and function to the above-described second coupler 1', but differs from that second coupler 1' in that concave surfaces formed by respective substantially arcuate portions 6" of a coupling element 3" of the third coupler 1" are joined together by a hollow rivet 16 about which the arcuate portions 6" can swivel, thereby enabling the orientation of the arcuate portions 6" to be adjusted with respect to one another and thus permitting scaffolding tubes 2 to be coupled together at any angle of inclination with respect to one another between 0O and 1800.
Claims (14)
1. A component for inclusion in a coupler for coupling together two elongate members, for example scaffolding tubes, the component being elongate, having an inner surface and an outer surface, and comprising, at respective first and second end portions thereof, first and second retaining means for use in retaining the component in a predetermined position in the said coupler, the said component further comprising a central portion lying between the said first and second retaining means and having a substantially arcuate inner surface, an axis of curvature of which is transverse with respect to the length of the component, such that that surface can engage with the exterior surface of one of the said elongate members when the coupler is in use, the said second end portion of the component being in the form of a channel having a base through which there is a hole, constituting the said second retaining means, and the said hole being surrounded completely by the material forming the said base.
2. A component as claimed in claim 1, wherein there is a slot through the said first end portion, which slot constitutes the said first retaining means.
3. A component as claimed in claim 2, wherein between first and second co-planar zones of the said first end portion, which zones extend along and include opposite edges of the component, there lies a region, extending between the said slot and the said central portion, which is inclined at a small angle with respect to the plane of the said first and second zones, in a substantially outward direction with respect to the said outer surface of the component, such that a first end of the region which lies closest to the said slot is furthest from the said plane, the said region being contiguous at a second end thereof, opposite to the said first end, with the said central portion and having its said first end formed by that material of the component which also constitutes part of the periphery of the said slot.
4. A component as claimed in claim 1, wherein the said first retaining means comprise a projection which extends substantially inwardly from the said inner surface of the component at said first end portion thereof.
5. A component for inclusion in a coupler for coupling together two elongate members, for example scaffolding tubes, the component having been made by forming an elongate sheet metal blank having first and second holes through it near first and second opposite ends thereof, respectively, and then deforming the blank so that, in a particular orientation of the deformed blank, with two elongate parts thereof near said first end and including respective long sides of the blank lying horizontally, the metal which previously formed that boundary of the first hole which is nearer the second hole now constitutes the tip of a strip, between said parts, projecting downwardly from the remainder of the blank at a small angle to the horizontal, the higher end of the strip being nearer to the second hole than is the tip of the strip and the strip being still joined along both sides to said parts, the material near the second end of the blank now forms an upwardly open channel with the second hole at its base and the material between the channel and the higher end of the strip is arcuate and curves upwardly, proceeding along the deformed blank from the higher end of the strip to the channel.
6. A component for inclusion in a coupler for coupling together two elongate members, for example scaffolding tubes, the component being elongate and comprising, when in a particular orientation and proceeding along the component from one end to the opposite end, a first portion which is flat and horizontal and has at the extremity thereof remote from the first end of the component a first hole through it midway between the edges of the component, a second portion in which first and second zones including opposite edges of the component are joined along their inner sides to a central region between said zones which is lower than said zones and is inclined to the horizontal by a small angle, the extremity of the central region which is nearer the first hole being lower than the opposite extremity of the central region, a third portion which is arcuate, with an axis of curvature lying above the component and transverse with respect to its length, and finally a fourth portion which is in the form of a channel the length of which is inclined to the horizontal, the end of the channel remote from the third portion of the component being higher than the end of the channel nearer the third portion, the mouth of the channel being uppermost and there being a second hole through the base of the channel.
7. A component substantially as hereinbefore described with reference to Figures 4a to 41 of the accompanying drawings.
8. A coupler for coupling together two elongate members, for example scaffolding tubes, which coupler includes a component as claimed in any preceding claim and comprises a coupling element having a substantially arcuate portion whose axis of curvature extends in a direction which is transverse to that of the axis of curvature of the arcuate surface of the said central portion of the said component, which substantially arcuate portion of the coupling element can engage with the exterior surface of the other of the said elongate members when the coupler is in use, the coupling element being provided with third retaining means whereby the said component may be retained in a predetermined position with respect to the said coupling element, the said first and third retaining means together constituting a retaining assembly comprising a slot, formed through one of said component and said coupling element, and a projection, formed on the other of said component and said coupling element, which in use extends through the said slot, the said retaining assembly being shaped in such a way as to inhibit removal of the projection from that slot; the coupler further comprising a nut and bolt assembly arranged such that a bolt of that assembly passes through the said hole of the component when the coupler is in use, and the coupling element being provided with a seating portion for receiving the bolt and supporting the head thereof when the coupler is in use.
9. A coupler for coupling together two elongate members, for example scaffolding tubes, which coupler includes two components as claimed in any one of claims 1 to 7 and comprises a coupling element having a pair of substantially concave surfaces which are connected respectively to corresponding individual ones of the said components, the said concave surfaces of the coupling element each having an axis of curvature which is parallel to the axis of curvature of the arcuate surface of the central portion of the component connected thereto and each being shaped such that those concave surfaces can engage respectively with exterior surfaces of the said elongate members; each concave surface of the coupling element being provided with third retaining means whereby the component corresponding thereto may be retained in a predetermined position with respect to the concave surface concerned, the said first and third retaining means of each mutually-connected component and concave surface together constituting a retaining assembly comprising a slot, formed through one of said component and said concave surface, and a projection, formed on the other of said component and said concave surface, which in use extends through the said slot, each of the said retaining assemblies being shaped in such a way as to inhibit removal of the projection from that slot; the coupler further comprising a pair of nut and bolt assemblies arranged such that respective bolts of those assemblies pass through the said holes of respective ones of the said components when the coupler is in use, and the coupling element being provided with respective seating portions for receiving respective bolts and supporting respective heads thereof when the coupler is in use.
10. A coupler as claimed in claim 9, wherein the said substantially concave surfaces are arranged in such a way that their respective axes of curvature are transverse with respect to one another.
11. A coupler as claimed in claim 9, wherein the said substantially concave surfaces are formed by respective substantially arcuate portions of the coupling element which are connected together in such a way as to be pivotable about their mutual point of connection, thereby to enable the inclination of the axis of curvature of one of the said substantially arcuate portions with respect to that of the other of those portions to be adjusted.
12. A coupler as claimed in any one of claims 8 to 11, wherein the or each said bolt is a T-bolt, having a threaded stem and a cross-arm, the T-bolt and its associated nut being of such dimensions that the Tbolt is held captive within the said hole when the nut is on the stem thereof,and wherein the or each seating portion comprises two spaced-apart somewhat hook-shaped parts between which the said stem passes and into which are inserted opposite end portions of the said crossarm.
13. A coupler as claimed in any one of claims 8 to 12, wherein in the or each retaining assembly the said slot is provided along one edge thereof with an abutment portion arranged so that that portion rests against a portion of the said projection when the head of the said bolt is not seated within the said seating portion, thereby limiting the extent to which the component concerned may move away from the said coupling element to which that component is connected during coupling and uncoupling of elongate members using the coupler.
14. A coupler substantially as hereinbefore described with reference to Figures 1, 2, 3a, 3b, 3c, 3d, 5, 6, 7a, 7b, 7c, 8 and 9 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8906151A GB2229219A (en) | 1989-03-17 | 1989-03-17 | Couplers for coupling together two elongate members e.g. scaffolding tubes and component for inclusion therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8906151A GB2229219A (en) | 1989-03-17 | 1989-03-17 | Couplers for coupling together two elongate members e.g. scaffolding tubes and component for inclusion therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8906151D0 GB8906151D0 (en) | 1989-05-04 |
| GB2229219A true GB2229219A (en) | 1990-09-19 |
Family
ID=10653517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8906151A Withdrawn GB2229219A (en) | 1989-03-17 | 1989-03-17 | Couplers for coupling together two elongate members e.g. scaffolding tubes and component for inclusion therein |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2229219A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2248873A (en) * | 1990-10-16 | 1992-04-22 | London & Midland Pressform Ltd | Scaffold coupler |
| CN103216083A (en) * | 2013-05-08 | 2013-07-24 | 朱新伟 | Template supporting frame system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1030843A (en) * | 1962-02-01 | 1966-05-25 | David Roberts & Co Engineers L | Improvements in or relating to scaffold couplings |
| GB1129996A (en) * | 1964-12-19 | 1968-10-09 | David Roberts & Company Engine | Improvements in or relating to scaffold couplings |
| GB1229192A (en) * | 1967-03-16 | 1971-04-21 | ||
| GB1253041A (en) * | 1968-05-23 | 1971-11-10 | ||
| WO1987004211A1 (en) * | 1986-01-08 | 1987-07-16 | London & Midland Drop Forging Company Limited | Scaffolding clamp |
-
1989
- 1989-03-17 GB GB8906151A patent/GB2229219A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1030843A (en) * | 1962-02-01 | 1966-05-25 | David Roberts & Co Engineers L | Improvements in or relating to scaffold couplings |
| GB1129996A (en) * | 1964-12-19 | 1968-10-09 | David Roberts & Company Engine | Improvements in or relating to scaffold couplings |
| GB1229192A (en) * | 1967-03-16 | 1971-04-21 | ||
| GB1253041A (en) * | 1968-05-23 | 1971-11-10 | ||
| WO1987004211A1 (en) * | 1986-01-08 | 1987-07-16 | London & Midland Drop Forging Company Limited | Scaffolding clamp |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2248873A (en) * | 1990-10-16 | 1992-04-22 | London & Midland Pressform Ltd | Scaffold coupler |
| CN103216083A (en) * | 2013-05-08 | 2013-07-24 | 朱新伟 | Template supporting frame system |
| CN103216083B (en) * | 2013-05-08 | 2015-02-04 | 朱新伟 | Template supporting frame system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8906151D0 (en) | 1989-05-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |