CA1216728A - Dismountable framework - Google Patents
Dismountable frameworkInfo
- Publication number
- CA1216728A CA1216728A CA000446209A CA446209A CA1216728A CA 1216728 A CA1216728 A CA 1216728A CA 000446209 A CA000446209 A CA 000446209A CA 446209 A CA446209 A CA 446209A CA 1216728 A CA1216728 A CA 1216728A
- Authority
- CA
- Canada
- Prior art keywords
- members
- pillar
- tenon
- operatively
- formation
- 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
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
- E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
ABSTRACT
DISMOUNTABLE FRAMEWORK
Dismountable multi-purpose framework (for example for use in forming access towers or platforms) is provided using a set of elongate members, preferably metal angle; including pillar members 10 and linking members e.g. horizontal members 11 interconnected by engaging a tenon formation 12 at one end of a first pillar member with a socket formation 16 of a second pillar member so that they are aligned in end to end relationship. The linking members have apertured lugs 21 which engage the tenon formation between the pillar members and the assembly is secured by a U bolt 17 which engages the tenon formation and is tightened by a wedge 19.
DISMOUNTABLE FRAMEWORK
Dismountable multi-purpose framework (for example for use in forming access towers or platforms) is provided using a set of elongate members, preferably metal angle; including pillar members 10 and linking members e.g. horizontal members 11 interconnected by engaging a tenon formation 12 at one end of a first pillar member with a socket formation 16 of a second pillar member so that they are aligned in end to end relationship. The linking members have apertured lugs 21 which engage the tenon formation between the pillar members and the assembly is secured by a U bolt 17 which engages the tenon formation and is tightened by a wedge 19.
Description
1, DISMOUNTABLE FRAMEWORK
This invention relates to dismountable frameworks which may be ~sed for a wide range of purposes in forming temporary semi-permanent andJor readily dismo~ntable structures, particularly but not exclusively scaffolding, access towers or platforms, temporary load supports e.g~ for locating concrete shuttering or other falsework used in building, constructin~ temporary buildings or shelters, collapsihle freight containers and stilla~es, ~ 10 and the like.
In the past round section steel scaffold - tubiny has been almost universally employed for such purposes as the above, particularly by commercial contractors and, thouyh in many respects this material has proved satisfactory, it does have practical disadvantages. The tubing is costly;
_ it is heavy unwieldy and difficult to store, transport and handle particularly for small scale applications e.g. domestic use, and in larye scale applications such as substantial scaffolding erections, it is not always safe and secure as joining is normally effected by clamps in frictional enyagement with the tubing ~eriphery. Insufficient tightening or failure of even a single clam2, which may be ~nder considerable loadinc~, can cause a chain reaction leadiny to collapse of the entire structure, particularly as the tubing is not normally joined in end to end relationship i.e. each joint forms a side by side connection with forces transmitted in shear through the clamp and bendiny and/or twisting moments L)eing carried by the tubing.
The object of the present invention is to provide a dismountable framewor~ which is easily :~2~
~ .
and safely assembled and secured together without special skills, which is cheap and adaptable, which can be provided in a range of sizes including those suitable for domestic or "do it yourself"
S users and which can he trans~orted and stored in a minimum of space, and which is particularly reliable and safe in use.
According to the invention there is provided a set of members for constructin(3 a dismountable framework com~rising a plurality of operatively vertical elongate pillar members and a plurality of elongate linking members, end portions of said members being operatively interconnected to form a framework, a first end portion of one pillar member having a longitudinally projecting tenon formation and a second end portion of another pillar member having a socket formation opening longitudinally thereof to receive said tenon formation so that said pillar members are operatively ali9ned in rectilinear end-to-end relationship;
end portions of the linking members each including an apertured lug for engayement with said tenon between said end portions in use to locate the linking member whereby the latter member is located in a vertical plane which includes a common axis of both of said pillar members and said tenon formation.
Preferably the second end portion is provided with securing means comprising a retainin~ member displaceable laterally of said end portion to engage the periphery of the inserted tenon formation.
An embodiment of the invention with certain variations and modifications is now more particularly described with reference to the accompanying ~6~
3.
drawings, wherein:
Figure 1 is an exploded perspective view of part of a rectilinear framework;
Fic~ure 2 is an elevation oE an assembled joint of the framework;
Figure 3 is a sectional plan view on line 3-3 of Figure 2;
Figure 4 is a perspective view of a modified form of wedge;
Figure 5 is a perspective view of an end portion of a further form of cross member;
~ Figure 6 is a perspective diagram of an access tower;
Figures 7, 8 and 9 are perspective diagrams of examples of other structures utilising the invention; and Figures 10, 11, 12 and 13 are perspective views of respective additional members for use with the invention.
-A set of members or constructing a light duty rectilinear framework or use as scaffolding or the like, will first be described. The dismountable members ln the example shown in Figures 1 to 3, are of two kinds; vertical or pillar members 10 and linkiny members in the form of horizontal or cross members 11, major elongate parts of all of which consist of standard L section steel angle and having means for interconnection at each end thereof. For light duty applications such as a small domestic access platform e.g.
for use on a staircase or for constructing a work bench or the like each member can be an effective length oE 75cm Eor ease of handlinc~
and storage and the angle section could be 2.5cm.
Wider ancl heavier section may be used e~g. 40 mm angle section in 3 mm gauge metal for heavy duty frameworks and longer members may be employecl
This invention relates to dismountable frameworks which may be ~sed for a wide range of purposes in forming temporary semi-permanent andJor readily dismo~ntable structures, particularly but not exclusively scaffolding, access towers or platforms, temporary load supports e.g~ for locating concrete shuttering or other falsework used in building, constructin~ temporary buildings or shelters, collapsihle freight containers and stilla~es, ~ 10 and the like.
In the past round section steel scaffold - tubiny has been almost universally employed for such purposes as the above, particularly by commercial contractors and, thouyh in many respects this material has proved satisfactory, it does have practical disadvantages. The tubing is costly;
_ it is heavy unwieldy and difficult to store, transport and handle particularly for small scale applications e.g. domestic use, and in larye scale applications such as substantial scaffolding erections, it is not always safe and secure as joining is normally effected by clamps in frictional enyagement with the tubing ~eriphery. Insufficient tightening or failure of even a single clam2, which may be ~nder considerable loadinc~, can cause a chain reaction leadiny to collapse of the entire structure, particularly as the tubing is not normally joined in end to end relationship i.e. each joint forms a side by side connection with forces transmitted in shear through the clamp and bendiny and/or twisting moments L)eing carried by the tubing.
The object of the present invention is to provide a dismountable framewor~ which is easily :~2~
~ .
and safely assembled and secured together without special skills, which is cheap and adaptable, which can be provided in a range of sizes including those suitable for domestic or "do it yourself"
S users and which can he trans~orted and stored in a minimum of space, and which is particularly reliable and safe in use.
According to the invention there is provided a set of members for constructin(3 a dismountable framework com~rising a plurality of operatively vertical elongate pillar members and a plurality of elongate linking members, end portions of said members being operatively interconnected to form a framework, a first end portion of one pillar member having a longitudinally projecting tenon formation and a second end portion of another pillar member having a socket formation opening longitudinally thereof to receive said tenon formation so that said pillar members are operatively ali9ned in rectilinear end-to-end relationship;
end portions of the linking members each including an apertured lug for engayement with said tenon between said end portions in use to locate the linking member whereby the latter member is located in a vertical plane which includes a common axis of both of said pillar members and said tenon formation.
Preferably the second end portion is provided with securing means comprising a retainin~ member displaceable laterally of said end portion to engage the periphery of the inserted tenon formation.
An embodiment of the invention with certain variations and modifications is now more particularly described with reference to the accompanying ~6~
3.
drawings, wherein:
Figure 1 is an exploded perspective view of part of a rectilinear framework;
Fic~ure 2 is an elevation oE an assembled joint of the framework;
Figure 3 is a sectional plan view on line 3-3 of Figure 2;
Figure 4 is a perspective view of a modified form of wedge;
Figure 5 is a perspective view of an end portion of a further form of cross member;
~ Figure 6 is a perspective diagram of an access tower;
Figures 7, 8 and 9 are perspective diagrams of examples of other structures utilising the invention; and Figures 10, 11, 12 and 13 are perspective views of respective additional members for use with the invention.
-A set of members or constructing a light duty rectilinear framework or use as scaffolding or the like, will first be described. The dismountable members ln the example shown in Figures 1 to 3, are of two kinds; vertical or pillar members 10 and linkiny members in the form of horizontal or cross members 11, major elongate parts of all of which consist of standard L section steel angle and having means for interconnection at each end thereof. For light duty applications such as a small domestic access platform e.g.
for use on a staircase or for constructing a work bench or the like each member can be an effective length oE 75cm Eor ease of handlinc~
and storage and the angle section could be 2.5cm.
Wider ancl heavier section may be used e~g. 40 mm angle section in 3 mm gauge metal for heavy duty frameworks and longer members may be employecl
2~
4.in some circumstances.
In Figures 1 to 3 only the lower end of an upper pillar member lOa and the upper end of a lower s~ch member lOb is shown toyether with one end only of three cross members lla~ b, c to connect with the pillar members at right angles.
Each pillar rnember 10 has a first operativel~
upper encl portion forming a male connection by having a longitudinally extending tenon 12 welded to a block or distance piece between the inner faces of the angle webs and projecting centrally through a square end abutment plate 13 which is also welded to sai~ webs. In this example tenon 12 is a circular section steel peg having a flat or notch 14 on one side partway along its free lenyth.
The second operatively lower end portion of each pillar member 10 forms a female connection includiny a mortice aperture 15, in this example a circular bore in the centre of a square end abutment plate 16 welc~ed to the webs of the angle section.
The latter end portion is also provided with securiny means comprising a stirruy member in the form of a U bolt 17 located in a pair of bores in one web of the an~31e so as to provide a loop within the angle which embraces tenon 12 when the latter is inserted into mortice 15.
The outer ends of 1] bolt 17 mount a cross piece 18 permitting its effective lenyth to be selectively adjusted and a captive wedge 19 acts between the outer face of the associated anyle web and cross piece 18 to draw the U bolt 17 into tiyht 72~
5~
positive engagement with the notch 14 of tenon 12 to secure the assembly.
In the above manner a pillar of any desired length can be built up using successive pillar n~embers 10 and tllese are secured in aligned end-to-end relationship so that down thrust is transmitted directly along their length. It will be observed that the inherent weight-bearing ability of a pillar so formed does not in any way depend on 1~ the security or clamping enyagement of the securing means with the tenons 12, indeed Eor some applications securing means may not be necessary.
.
~ ach cross piece 11 is formed from angle generally as described with reference to members 10 and both end portions of each cross member comprise a weldeA on end abutment plate 20 and an apertured lug 21 projecting longitudinally beyond plate 20, this lug being welded to the upper horizontal web of the angle either below (21c) or above (21a, b) the latter.
Where cross members are to be jolned to the assembled pillar their lugs 21 are positioned on tenon 12 in sequence e.g. as illustrated in Figures 1 to 3 where a three-way connection is shown, before the tenon is engaged with the next upper pillar member lOa~
The wedge 19 is formed from flat plate and, as best shown in Figure 2, has one edye cut o~t to form a notch between upper and lower end stops 30a, 30b which retain the wedge captive with the U bolt 17. An upper part of the notch includes an inclineA edge face 31 enabling the U bolt to be tightened by driving the wedge downwards 6.
to react with cross piece 18, elongated slots 18a in the la~ter permit~ing it to tilt on bolt 17. The lower part of the notch is deeper and not inclined to permit maximum inward movement of the U bolt for freeing ~he tenon 12. In a modification shown in Figure 4 the end stops 30a, 30b are ~ridged by a bar 32 integral with or welded onto said stops, so strengtheniny the wed~3e and making its captiv~ retention on cross piece 18 more positive.
- Wedge 19 is pre~erably distinctively coloured so that a very quick visual inspection of the assemble~ framework will shown whether it has been tightened into place (or has become loosened or displaced in service). In any event the wedge will tend to drop to the securec~ position in use which will retain the tenon automatically even if the we(~ge has not been fully tightened and, as explained above, the integrity of the structure does not depend on this tightening, downward loading on the cross members 11 and/or upper pillar member l~a is transmitted directly to the top of pillar member lOb and lateral forces on the latter are transmitted from members ll directly to the tenon 12, the securing means carries none of these forces.
Instead of the adjustable U bolts 17 a simple link or hook-shaped bar, or a screw clamp, could serve as a retaining member of the securing means, and it will also be appreciated that various forms of mortice and tenon could be employe~
though for ease of manufacture and availability of material, the round peg and circular apertures are preferred. Thus, oval, square or rectangular section mortices and tenons or other config~rations %~
7.
might be employed in some applications and the section and shaping of the members themselves can be widely varied.
For some forms of framework a fourth horizontal cross memher may be required to connect with the pillar assembly shown in Figures 1 to 3.
Figure 5 shows an end portion of a fourth cross member lld which can be connected at right angles to members lla, llc to form a continuation of member llb. ~his member has an apertured lug ~ 21_ to enga~e tenon 12, and a slot 40 cut o~t of its upper web to provide clearance for the wec~ye 19. A pad 41 is welded to the vertical web of member lld in the region of slo~ 4n for reinforcement.
The strength and stiffness of the framework can be added to by use of diagonal bracing to form a triangulated rectilinear structure and Eigures 6 to 9 are ~erspective diagrams of four examples of the many forms of structure which can be provided using the invention.
Figure 6 shows a simple free-standing access platform or tower 4~ using four pillar assemblies made up of sets of pillar members 10. The lowest portions of these assemblies are short pillar members 50 provided with adjustable levelling feet 51 shown in detail in Eigure 12. Each side frame of the tower includes horizontal rnembers 11 ancl is bracec3 in the vertical plane by diagonal sloping linking members 52 extending from the tenon at the lower end oE a lower pillar member to that at the upper end of the parallel pillar member on that side, members 52 having angled lugs at each end for this p~rpose. Additional ~ .
rigidity is provided by horizontal diagonal linking members 53 connecting opposite corners o~ the frame, and the pillar members in this exarnple are also provided with intermediate attachment p~ints within the web angle to receive further horizontal cross braces 54 or, at the top level, hori~ontal members 55 forminy a safety rail around a deck 56. Toe boards 57 are also shown.
pair of horizontal locking members 58, shown in detail in Figure 10 are used to finish off the tower these having socket formations 59 at ~ each end at right anyles to the length of the member with securing ~ bolts and wedyes to engaye the uppermost tenon formations of the pillar assemblies.
Figures 7, 8 and 9 are diagrams of three of many and varied forms of frarnework structures which may readily be assembled using the inveT-tion.
-Figure 7 shows the brid~ing of a substantial span ~etween two spaced towers 60, 61 similarto those shown in Figure 6, the righthand tower 61 being extended u~wards to a working platoform 62, for example at first floor window level.
To add to the support of the horizontal span of this structure a further forrm of member is used, a diagonal cantilever member 63 (see Figure ll)o This member has lug 64 angled to be horizontal at its lower end and a tenon formation 65 (as on the pillar members) angled to be vertical at its upper end to receive c,ther mernbers. To add to its rigidity the lower end is also provided with a downwardly extending abutment 66 haviny a vertical face to locate ayainst a face of the adjoining pillar member.
72~
9.
Also shown is a diagonal outrigger or buttress member 67 (see Figure 13~ having angled lugs 68 at each end which extend horizontally in use to connect with respective tenon formations at different levels. Member 67 has an upwardly extendinc3 abutment 69 at its upper end with a vertical face to locate against a face of the adjoinin~ pillar member.
In Figure 8 a free standing tower framework 65 is shown with a work platform 66 at second - story level cantilivered outward from opposite sides of the main tower using cantilever members 63, stability and support being provided by ground engaging feet 51 mounted on outrigyers ~elow ~he cantilevered parts of platform 66, the outriggers using buttress members 67 secured by locking members 58.
Figure 9 shows another form of framework 70 providing a longer work platform 71 at hi~3h level using cantilever members 63, one end of the platform being supported on the roof of a single story building 72.
The different types of member may each be distinctively coloured to facilitate assembly and dia~rams of common types of assembly listing the members required to build it may be provided.
It is contemplated that such diagrams and listing might be provided for standard or for special purpose structures using a computer which will also be programmed to provide calculations of safe working loading, and, if required, costiny of the members needed either on a purchase or hire basis.
~t~1~3t~ ?
10 .
~ sing such a diagram the structures can be safely anc] reliably assembled even by unskilled or inexperienced labour, e.g. for "d~ it yourself"
repairs or maintenance by householders themselves.
As the structure is self-supporting and positively locating from the ground up it can be safely stood on and climbed up as erection proceeds.
The use of members to ma~e up each side of a rectilinear triangulated framework or truss whose loads are transmitted in a common vertical plane along their axes, and the manner in which the loads are all carried to the axially centred tenons without reliance on the integrity of securing or fastening means or application of off-centre loadings thereto as is the case when tubular or other members are secured side by side enables stabLe free stanc3ing structures to be provided avoiding the need in many cases to "tie" them ~ in to a building, and the ability to construct simply and safely cantilevered or bridging structures over a wide span means that access to many locations otherwise awkward to get to can be readily provided, and that room can be left at ground level for work and for unobstructed and safe passaye e.g.
along pavements or footways or ~o the doors or shop winclows of a buildiny beiny worked on.
Different weights or gauges of member may be employed in the same structure, for exarnple a heavier gauge pillar member could be used in the lower parts of a tall tower or scaffoldiny or for the formation of a hollow yirder or cantilever platform to span a substantial distance. Additional members can be purchased and added onto an existin~
system as required and it is anticipated that there will be considera~le cost saving over conventional tubular scaffoldiny and clamps, for example steel angle equivalent in service to standard scaffold tu~iny costs, by weight, less than half the price of the latter and is in any event much liyhter in weight for a yiven length~ 40mm angle of 3mm gau(3e steel weighs 1.81Kg per metre lenyth while the same length of standard steel scaffold tube weights about 3 Kg. and will no. withstand the same loading.
Other members and accessories includin~ special purpose fittings can be incorporated in the set of members or adapted to interconnect therewith, for example access ladders or steps, telescopic legs or pillars, ground engayiny wheels for moveable towers, staging or stillages, hoists or lifts for materials, doors or shutters for collapsible transport or storage racks or container frames, conveyor tracks etc.
Distal portions of the tenons 12 may each be provided with a throuyh cross bore to receive a securing bolt or loc~; e.g. to prevent unauthorised dismantling or temperinc3 with an assembled structure.
4.in some circumstances.
In Figures 1 to 3 only the lower end of an upper pillar member lOa and the upper end of a lower s~ch member lOb is shown toyether with one end only of three cross members lla~ b, c to connect with the pillar members at right angles.
Each pillar rnember 10 has a first operativel~
upper encl portion forming a male connection by having a longitudinally extending tenon 12 welded to a block or distance piece between the inner faces of the angle webs and projecting centrally through a square end abutment plate 13 which is also welded to sai~ webs. In this example tenon 12 is a circular section steel peg having a flat or notch 14 on one side partway along its free lenyth.
The second operatively lower end portion of each pillar member 10 forms a female connection includiny a mortice aperture 15, in this example a circular bore in the centre of a square end abutment plate 16 welc~ed to the webs of the angle section.
The latter end portion is also provided with securiny means comprising a stirruy member in the form of a U bolt 17 located in a pair of bores in one web of the an~31e so as to provide a loop within the angle which embraces tenon 12 when the latter is inserted into mortice 15.
The outer ends of 1] bolt 17 mount a cross piece 18 permitting its effective lenyth to be selectively adjusted and a captive wedge 19 acts between the outer face of the associated anyle web and cross piece 18 to draw the U bolt 17 into tiyht 72~
5~
positive engagement with the notch 14 of tenon 12 to secure the assembly.
In the above manner a pillar of any desired length can be built up using successive pillar n~embers 10 and tllese are secured in aligned end-to-end relationship so that down thrust is transmitted directly along their length. It will be observed that the inherent weight-bearing ability of a pillar so formed does not in any way depend on 1~ the security or clamping enyagement of the securing means with the tenons 12, indeed Eor some applications securing means may not be necessary.
.
~ ach cross piece 11 is formed from angle generally as described with reference to members 10 and both end portions of each cross member comprise a weldeA on end abutment plate 20 and an apertured lug 21 projecting longitudinally beyond plate 20, this lug being welded to the upper horizontal web of the angle either below (21c) or above (21a, b) the latter.
Where cross members are to be jolned to the assembled pillar their lugs 21 are positioned on tenon 12 in sequence e.g. as illustrated in Figures 1 to 3 where a three-way connection is shown, before the tenon is engaged with the next upper pillar member lOa~
The wedge 19 is formed from flat plate and, as best shown in Figure 2, has one edye cut o~t to form a notch between upper and lower end stops 30a, 30b which retain the wedge captive with the U bolt 17. An upper part of the notch includes an inclineA edge face 31 enabling the U bolt to be tightened by driving the wedge downwards 6.
to react with cross piece 18, elongated slots 18a in the la~ter permit~ing it to tilt on bolt 17. The lower part of the notch is deeper and not inclined to permit maximum inward movement of the U bolt for freeing ~he tenon 12. In a modification shown in Figure 4 the end stops 30a, 30b are ~ridged by a bar 32 integral with or welded onto said stops, so strengtheniny the wed~3e and making its captiv~ retention on cross piece 18 more positive.
- Wedge 19 is pre~erably distinctively coloured so that a very quick visual inspection of the assemble~ framework will shown whether it has been tightened into place (or has become loosened or displaced in service). In any event the wedge will tend to drop to the securec~ position in use which will retain the tenon automatically even if the we(~ge has not been fully tightened and, as explained above, the integrity of the structure does not depend on this tightening, downward loading on the cross members 11 and/or upper pillar member l~a is transmitted directly to the top of pillar member lOb and lateral forces on the latter are transmitted from members ll directly to the tenon 12, the securing means carries none of these forces.
Instead of the adjustable U bolts 17 a simple link or hook-shaped bar, or a screw clamp, could serve as a retaining member of the securing means, and it will also be appreciated that various forms of mortice and tenon could be employe~
though for ease of manufacture and availability of material, the round peg and circular apertures are preferred. Thus, oval, square or rectangular section mortices and tenons or other config~rations %~
7.
might be employed in some applications and the section and shaping of the members themselves can be widely varied.
For some forms of framework a fourth horizontal cross memher may be required to connect with the pillar assembly shown in Figures 1 to 3.
Figure 5 shows an end portion of a fourth cross member lld which can be connected at right angles to members lla, llc to form a continuation of member llb. ~his member has an apertured lug ~ 21_ to enga~e tenon 12, and a slot 40 cut o~t of its upper web to provide clearance for the wec~ye 19. A pad 41 is welded to the vertical web of member lld in the region of slo~ 4n for reinforcement.
The strength and stiffness of the framework can be added to by use of diagonal bracing to form a triangulated rectilinear structure and Eigures 6 to 9 are ~erspective diagrams of four examples of the many forms of structure which can be provided using the invention.
Figure 6 shows a simple free-standing access platform or tower 4~ using four pillar assemblies made up of sets of pillar members 10. The lowest portions of these assemblies are short pillar members 50 provided with adjustable levelling feet 51 shown in detail in Eigure 12. Each side frame of the tower includes horizontal rnembers 11 ancl is bracec3 in the vertical plane by diagonal sloping linking members 52 extending from the tenon at the lower end oE a lower pillar member to that at the upper end of the parallel pillar member on that side, members 52 having angled lugs at each end for this p~rpose. Additional ~ .
rigidity is provided by horizontal diagonal linking members 53 connecting opposite corners o~ the frame, and the pillar members in this exarnple are also provided with intermediate attachment p~ints within the web angle to receive further horizontal cross braces 54 or, at the top level, hori~ontal members 55 forminy a safety rail around a deck 56. Toe boards 57 are also shown.
pair of horizontal locking members 58, shown in detail in Figure 10 are used to finish off the tower these having socket formations 59 at ~ each end at right anyles to the length of the member with securing ~ bolts and wedyes to engaye the uppermost tenon formations of the pillar assemblies.
Figures 7, 8 and 9 are diagrams of three of many and varied forms of frarnework structures which may readily be assembled using the inveT-tion.
-Figure 7 shows the brid~ing of a substantial span ~etween two spaced towers 60, 61 similarto those shown in Figure 6, the righthand tower 61 being extended u~wards to a working platoform 62, for example at first floor window level.
To add to the support of the horizontal span of this structure a further forrm of member is used, a diagonal cantilever member 63 (see Figure ll)o This member has lug 64 angled to be horizontal at its lower end and a tenon formation 65 (as on the pillar members) angled to be vertical at its upper end to receive c,ther mernbers. To add to its rigidity the lower end is also provided with a downwardly extending abutment 66 haviny a vertical face to locate ayainst a face of the adjoining pillar member.
72~
9.
Also shown is a diagonal outrigger or buttress member 67 (see Figure 13~ having angled lugs 68 at each end which extend horizontally in use to connect with respective tenon formations at different levels. Member 67 has an upwardly extendinc3 abutment 69 at its upper end with a vertical face to locate against a face of the adjoinin~ pillar member.
In Figure 8 a free standing tower framework 65 is shown with a work platform 66 at second - story level cantilivered outward from opposite sides of the main tower using cantilever members 63, stability and support being provided by ground engaging feet 51 mounted on outrigyers ~elow ~he cantilevered parts of platform 66, the outriggers using buttress members 67 secured by locking members 58.
Figure 9 shows another form of framework 70 providing a longer work platform 71 at hi~3h level using cantilever members 63, one end of the platform being supported on the roof of a single story building 72.
The different types of member may each be distinctively coloured to facilitate assembly and dia~rams of common types of assembly listing the members required to build it may be provided.
It is contemplated that such diagrams and listing might be provided for standard or for special purpose structures using a computer which will also be programmed to provide calculations of safe working loading, and, if required, costiny of the members needed either on a purchase or hire basis.
~t~1~3t~ ?
10 .
~ sing such a diagram the structures can be safely anc] reliably assembled even by unskilled or inexperienced labour, e.g. for "d~ it yourself"
repairs or maintenance by householders themselves.
As the structure is self-supporting and positively locating from the ground up it can be safely stood on and climbed up as erection proceeds.
The use of members to ma~e up each side of a rectilinear triangulated framework or truss whose loads are transmitted in a common vertical plane along their axes, and the manner in which the loads are all carried to the axially centred tenons without reliance on the integrity of securing or fastening means or application of off-centre loadings thereto as is the case when tubular or other members are secured side by side enables stabLe free stanc3ing structures to be provided avoiding the need in many cases to "tie" them ~ in to a building, and the ability to construct simply and safely cantilevered or bridging structures over a wide span means that access to many locations otherwise awkward to get to can be readily provided, and that room can be left at ground level for work and for unobstructed and safe passaye e.g.
along pavements or footways or ~o the doors or shop winclows of a buildiny beiny worked on.
Different weights or gauges of member may be employed in the same structure, for exarnple a heavier gauge pillar member could be used in the lower parts of a tall tower or scaffoldiny or for the formation of a hollow yirder or cantilever platform to span a substantial distance. Additional members can be purchased and added onto an existin~
system as required and it is anticipated that there will be considera~le cost saving over conventional tubular scaffoldiny and clamps, for example steel angle equivalent in service to standard scaffold tu~iny costs, by weight, less than half the price of the latter and is in any event much liyhter in weight for a yiven length~ 40mm angle of 3mm gau(3e steel weighs 1.81Kg per metre lenyth while the same length of standard steel scaffold tube weights about 3 Kg. and will no. withstand the same loading.
Other members and accessories includin~ special purpose fittings can be incorporated in the set of members or adapted to interconnect therewith, for example access ladders or steps, telescopic legs or pillars, ground engayiny wheels for moveable towers, staging or stillages, hoists or lifts for materials, doors or shutters for collapsible transport or storage racks or container frames, conveyor tracks etc.
Distal portions of the tenons 12 may each be provided with a throuyh cross bore to receive a securing bolt or loc~; e.g. to prevent unauthorised dismantling or temperinc3 with an assembled structure.
Claims (12)
1. A set of members for constructing a dismountable framework comprising a plurality of operatively vertical elongate pillar members and a plurality of elongate linking members, end portions of said members being operatively interconnected to form a framework, a first end portion of one pillar member having a longitudinally projecting tenon formation and a second end portion of another pillar member having a socket formation opening longitudinally thereof to receive said tenon formation so that said pillar members are operatively aligned in rectilinear end-to-end relationship; end portions of the linking members each including an apertured lug for engagement with said tenon between said end portions in use to locate the linking member whereby the latter member is located in a vertical plane which includes a common axis of both of said pillar members and said tenon formation.
2. A set of members as in Claim 1 wherein said second end portion is provided with securing means comprising a retaining member displaceable laterally of said end portion to engage the periphery of the inserted tenon formation.
3. A set of members as in Claim 2 wherein the retaining member is a stirrup member, and the securing means further includes a wedge or other means for tightening the stirrup member into locking engagement with the tenon formation.
4. A set of members as in Claim 3 wherein the tenon formation has a notch or cutaway with which the stirrup member engages in use.
5. A set of members as in claim 1 wherein the first end portion is the operatively upper end of the one pillar member.
6. A set of members as in claim 1 including at least two cross members whose apertured lugs are engageable with a common tenon formation.
7. A set of members as in claim 1 wherein the linking members include at least one cross member which is horizontal in use having apertured lugs at each end for engagement with tenon formations of respective spaced parallel pillar members to provide a rectilinear framework.
8. A set of members as in claim 7 wherein the linking members further include at least one diagonal member which is sloping in use having an apertured lug disposed at an angle at the operatively upper end for engagement with the tenon formation at the upper end of one of a pair of parallel spaced pillar members in use and an apertured lug disposed at an angle at the operatively lower end for engagement with the tenon formation at the lower end of the other of said pair in use to provide a triangulated rectilinear framework.
9. A set of members as in claim 1 wherein the linking members include at least one diagonal member which is horizontal in use for extending diagonally of a rectilinear framework comprising at least four horizontally spaced interconnected pillar members, the latter diagonal member having an apertured lug at each end to engage respective tenon formations of the pillar members at the opposite corners.
10. A set of members as in claim 1 including at least one cantilever member having an angled apertured lug at its operatively lower end and a tenon formation at its operatively upper end angled to be vertical in use on which other members can be located above and horizontally spaced from said lower end.
11. A set of members as in claim 1 including at least one buttress member having apertured lugs at operatively lower and upper ends angled to be horizontal in use whereby the lower end is operatively below and offset horizontally from a member with which the upper end is engaged in use.
12. A set of members as in Claim 10 or 11 wherein said cantilever member and said buttress member include an abutment providing an operatively vertical face to locate against a face of an adjoining pillar member.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB838302514A GB8302514D0 (en) | 1983-01-29 | 1983-01-29 | Dismountable framework |
| GB8302514 | 1983-01-29 | ||
| GB8333595 | 1983-12-16 | ||
| GB08333595A GB2142701B (en) | 1983-01-29 | 1983-12-16 | Dismountable framework |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1216728A true CA1216728A (en) | 1987-01-20 |
Family
ID=26285077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000446209A Expired CA1216728A (en) | 1983-01-29 | 1984-01-27 | Dismountable framework |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0117643B1 (en) |
| CA (1) | CA1216728A (en) |
| DE (1) | DE3473900D1 (en) |
| GB (1) | GB2142701B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2197418A (en) * | 1986-11-06 | 1988-05-18 | Grayston Central Services | Scaffolding elements and joints thereof |
| US5181815A (en) * | 1990-11-01 | 1993-01-26 | Haberkorn Robert W | Collapsible structure for unitizing and bracing a load in a trailer |
| DE29601355U1 (en) * | 1996-01-29 | 1997-06-05 | Frör, Werner, 91052 Erlangen | Connection nodes for building constructions |
| DE60136619D1 (en) * | 2000-04-04 | 2009-01-02 | Pieter Wouter Booysen | FRAMEWORK |
| DE102014114472A1 (en) * | 2014-10-06 | 2016-04-07 | Thyssenkrupp Ag | Strut connection for a steel structure and steel construction with strut connection |
| GB2553803A (en) * | 2016-09-14 | 2018-03-21 | Lakeside Industries Ltd | Access tower |
| CN108756191B (en) * | 2018-08-16 | 2024-05-03 | 浙江精工钢结构集团有限公司 | Construction platform structure |
| CN109610290B (en) * | 2019-01-24 | 2021-03-19 | 河海大学 | Landscape trestle |
| CN113513325B (en) * | 2020-05-14 | 2022-06-24 | 中国建筑第二工程局有限公司 | Shield tunneling machine steel receiving platform and mounting method thereof |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US964233A (en) * | 1909-08-25 | 1910-07-12 | Alexander Gilliland | Knockdown scaffold. |
| GB468045A (en) * | 1935-12-19 | 1937-06-21 | Richard Charles Leslie | Improvements in rods |
| FR888210A (en) * | 1942-01-29 | 1943-12-07 | Spacer allowing the assembly and maintenance without clamping members of tubular elements to constitute scaffolding | |
| GB631566A (en) * | 1947-11-15 | 1949-11-04 | George Walter Young Swanson | Improvements in street shelters |
| DE864145C (en) * | 1950-12-22 | 1953-01-22 | Erich Stark | Work scaffolding for external and internal work on structures of any kind |
| US2771324A (en) * | 1954-02-26 | 1956-11-20 | Sun Oil Co | Demountable scaffold |
| FR1243224A (en) * | 1958-12-18 | 1960-10-07 | Moses with multiple transformations | |
| CH418604A (en) * | 1965-02-09 | 1966-08-15 | Kohenof Djeki | Coupling for connecting pipes for use in scaffolding |
| NL135988C (en) * | 1965-05-13 | |||
| DE1928717A1 (en) * | 1968-06-19 | 1970-02-26 | Syncro Corp | Metal oxide capacitor and process for its manufacture |
| FR2040568A5 (en) * | 1969-04-03 | 1971-01-22 | Mills Echafaudages Tubul | |
| US3677601A (en) * | 1970-06-08 | 1972-07-18 | Knoll Intern Inc | Slung furniture |
| FR2239122A5 (en) * | 1973-07-25 | 1975-02-21 | Somefran | |
| FR2352202A1 (en) * | 1976-05-21 | 1977-12-16 | Richier Sa | Metal tower crane mast components connecting system - comprises combined pieces forming inclined surface recess for block wedge insertion |
| CA1056897A (en) * | 1977-11-25 | 1979-06-19 | Miranda Investments Limited | Connector for frame members |
| FR2473090A1 (en) * | 1980-01-02 | 1981-07-10 | Ricouard Marcel | Scaffolding for reinforced concrete shutter support - has socket joints for erection without tools and triangular cross braces |
| GB2133495A (en) * | 1982-12-01 | 1984-07-25 | Dennis H Peers | Rack systems |
-
1983
- 1983-12-16 GB GB08333595A patent/GB2142701B/en not_active Expired
-
1984
- 1984-01-27 CA CA000446209A patent/CA1216728A/en not_active Expired
- 1984-01-30 EP EP19840300545 patent/EP0117643B1/en not_active Expired
- 1984-01-30 DE DE8484300545T patent/DE3473900D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2142701A (en) | 1985-01-23 |
| GB8333595D0 (en) | 1984-01-25 |
| EP0117643B1 (en) | 1988-09-07 |
| EP0117643A3 (en) | 1985-09-11 |
| DE3473900D1 (en) | 1988-10-13 |
| EP0117643A2 (en) | 1984-09-05 |
| GB2142701B (en) | 1986-12-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |