WO2020085900A1 - Scaffolding tube coupler, and scaffolding system - Google Patents
Scaffolding tube coupler, and scaffolding system Download PDFInfo
- Publication number
- WO2020085900A1 WO2020085900A1 PCT/NL2019/050693 NL2019050693W WO2020085900A1 WO 2020085900 A1 WO2020085900 A1 WO 2020085900A1 NL 2019050693 W NL2019050693 W NL 2019050693W WO 2020085900 A1 WO2020085900 A1 WO 2020085900A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- receiving part
- scaffolding
- clamping
- scaffolding tube
- supporting part
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- E04G7/14—Clamps or clips for crossing members for clamping the members independently
-
- 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
- E04G7/08—Clamps for parallelly-arranged members
-
- 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
- E04G7/26—Connections between parts of the scaffold with separate coupling elements for use with specially-shaped scaffold members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/10—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using pivoting jaws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/14—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using wedges
Definitions
- the invention relates to a scaffolding tube coupler.
- a scaffolding coupler is known from, inter alia, Dutch patents NL75.356, NL7117188 and NL7811721, and is especially suitable for easy connection of scaffolding tubes, in particular standardized scaffolding tubes according to the NEN-EN 39:2001 standard (such tubes have an external diameter of 48.3 mm).
- a scaffolding is generally provided with a number of tubes (metal or steel, cylindrical tubes) mutually secured by a number of scaffolding tube couplers, in particular with standards and ledgers and generally with one or more diagonals.
- tube clamping is effected by striking home a key (i.e., an elongate wedge-shaped clamping part), which may be part of a coupler as mentioned, or a loose part.
- a key i.e., an elongate wedge-shaped clamping part
- the scaffolding coupler can be rapidly mounted and demounted.
- GB 1, 171, 126 shows an example of a
- Such a beam can for instance comprise a steel or iron profile, or, for example, a solid, in
- smooth scaffolding tubes are used (i.e., tubes without integral modular points of engagement).
- modular systems are known, for example the Peri Up system of PERI, having tubular standards which are configured at specific positions for coupling-on beam-shaped ledgers.
- the object of the present invention is an improved scaffolding system and respective coupler.
- the object of the invention is a system and coupler with which non-round elements (for example,
- rectangular tubular profiles can be coupled-on stably, firmly and efficiently.
- the scaffolding tube coupler is characterized by the features of claim 1.
- the present scaffolding tube coupler is configured for detachably coupling it to a scaffolding tube of a scaffolding, the coupler comprising a first receiving part for engaging the scaffolding tube, which tube receiving part, in particular, is formed by steel substantially U-shaped profiles, the coupler further comprising a second receiving part configured for engaging an elongate supporting part of rectangular cross section, the second receiving part being configured to clamp the elongate supporting part in two mutually different positions, the two positions comprising positions mutually rotated about a longitudinal axis (of the supporting part), in particular a first position and a second position rotated through an angle of 90 degrees.
- a supporting beam as mentioned can be efficiently and strongly incorporated in a scaffolding, with the coupler making it possible for the beam to be securely coupled-on in two different positions.
- This provides the possibihty to use on site, during assembly, a most favorable supporting beam position, for example having regard to beam load and/or a supporting surface furnished by the beam.
- a first supporting beam position can comprise, for example, a position in which a wide longitudinal side of the beam extends along a substantially vertical plane, while a second supporting beam position mentioned can be a position in which said wide longitudinal side of the beam extends
- an aspect of the invention provides a scaffolding system, comprising at least one scaffolding tube coupler according to the invention, wherein the coupler engages with the first receiving part a scaffolding tube, and with the second receiving part a rectangular supporting part, the supporting part, in particular, being held in a position mentioned of the different positions.
- Figure 1 is a perspective side view of an exemplary embodiment of the invention, in a closed position of the clamping parts;
- Figure 2 is a perspective front view of the exemplary embodiment
- Figure 3 is a side view of the example shown in Fig. 1, viewed from a first direction;
- Figure 4 is a second side view of the exemplary embodiment, viewed from a direction opposite to the first direction;
- Figure 5 is a bottom view of the exemplary embodiment
- Figure 6 is a top plan view of the exemplary embodiment
- Figure 7 is a perspective view of the exemplary embodiment, with a supporting part being clamped in a first supporting part position;
- Figure 8 is a similar view to Fig. 7, with the supporting part being clamped in a second supporting part position;
- Figure 9 is a schematic front view of a scaffolding Q.
- Figure 10 is a cross section of a supporting part, along line X-X of Figure 9.
- the drawing shows an example of a scaffolding tube coupler 1, which is configured for detachably coupling it to a scaffolding tube T of a scaffolding.
- a part of such a tube T is visible in Figures 7 and 8.
- the tube T, to which the coupler 1 is fixedly clamped can comprise, for example, a vertical standard or horizontal ledger, or, for example, a tube extending in another direction.
- the tube T can be a standardized
- scaffolding tube having an external diameter BD of 48.3mm, and a smooth external side, but that is not essential.
- Figure 9 shows a part of a scaffolding Q, in front view, comprising such couplers 1 and respective scaffolding tubes T (for example, standards, ledgers, and optional diagonals), mutually coupled by standard tube couplers 50.
- a supporting beam D is coupled to the scaffolding, for example a supporting beam D extending substantially in horizontal direction, which beam has a substantially rectangular cross section (see Figure 10).
- the beam D has two wide longitudinal sides S 1 (facing away from each other) and two narrow longitudinal sides S2 (facing away from each other), such that a width xl of a wide longitudinal side Si is greater than a width x2 of a narrow longitudinal side S2. More particularly, the width xl of a wide longitudinal side Si is greater than the external diameter BD
- a width x2 of a narrow longitudinal side S2 is less than the external diameter BD (x2 ⁇ BD).
- a crossbeam D can be used whose cross-sectional dimensions to some extent correspond to those of scaffolding tubes T to be used in the system.
- Other transverse dimensions of the beam D are also within the possibihties, which will be clear to those skilled in the art.
- the beam D may for instance be of hollow design (as in the example), but this is not essential; the beam can comprise, for example, a massive wooden beam.
- the beam D can comprise, for example, a ledger of a Peri Up system mentioned.
- Couplers 1 are provided to fix the supporting beam D detachably to the tubes T of the scaffolding tube system Q.
- the beam D can for instance serve to support a horizontal walking deck V or the like.
- the scaffold Q can comprise at least two mutually spaced apart supporting beams D to support a walking deck V or the like, with the supporting beams D coupled-on with respective couplers 1.
- FIGS. 1-8 show the scaffolding tube(-supporting beam) coupler 1 in more detail.
- the supporting beam coupler 1 is provided with a first receiving part 3 for engaging the scaffolding tube T.
- the first receiving part 3 can comprise, for example, a tube clamping coupler which is conventional, at least, known per se.
- the tube receiving part 3, in particular, is formed by steel, substantially U-shaped profiles 3a, 3b.
- the first receiving part comprises at least two, mutually hingeably coupled, U-shaped bracket parts 3a, 3b (in particular, a central first - outer - bracket part 3a and two - inner - second bracket parts 3b), as follows from the drawing.
- the bracket parts (profiles) 3a, 3b are pivotably coupled to each other through a hinge pin 3d, namely, pivotably between the clamped position shown and a swung-apart release position, not shown.
- the first receiving part 3 is lockable in a clamped position by means of a key locking, i.e., via a translatable (wedge-shaped) key 3c which is bringable from a locking position as shown to a release position.
- the coupler 1 is further provided with a second receiving part 5 configured for engaging an elongate supporting part/beam D (see Figures 7-10) of rectangular cross section.
- the second receiving part 5 may for instance be immovably fixed to the first receiving part 3 (for example, via one or more suitable welded joints), or be fixed thereto via a swivel coupler so as to allow rotation between the receiving parts 3, 5.
- a respective axis of rotation extends, for instance,
- the second receiving part 5 preferably comprises at least two, mutually hingeably coupled, U-shaped bracket parts 5a, 5b (in particular a central first - outer - bracket part 5a and two - inner - second bracket parts 5b), as follows from the drawing.
- the inner bracket parts 5b may for instance directly or indirectly be fixed by undersides thereof to sides facing them of the inner tube -receiving bracket parts 3b, or to an above-mentioned swivel coupler (not shown), for instance via suitable welded joints.
- the second receiving part 5 is lockable in the clamped position shown by means of a key locking, i.e., via a translatable (wedge-shaped) key 5c, to clamp first ends of the bracket parts 5a, 5b to each other.
- the second receiving part 5 is bringable from a locked/clamped position (as shown) to a release position (not shown), (analogously to the key locking of the first receiving part 3), for release of the beam receiving space M defined by that receiving part (for the purpose of introducing a supporting beam D into that space M or removing same therefrom).
- bracket parts (profiles) 5a, 5b are pivotably coupled to each other through a respective hinge pin 5d, namely, pivotably between the clamped position shown and the swung-apart release position (not shown).
- the last-mentioned hinge pin 5d is situated at a second end of the bracket parts 5a, 5b, opposite the wedge-shaped key clamping means.
- the second receiving part 5 is configured to clamp the elongate supporting part D in a first position, as well as in a second position in which the supporting part has been rotated about a longitudinal axis with respect to the first position, i.e., to clamp the supporting part in two mutually different positions, the two positions comprising positions mutually rotated about a longitudinal axis (of the supporting part), in particular a first position and a second position rotated through an angle of 90 degrees.
- the two clamping positions are represented in Figures 7 and 8.
- the U-shaped bracket parts 5a, 5b of the second receiving part, to this end, are preferably provided with flat supporting surfaces 9a, 9b (see Fig. 3) which extend parallel relative to each other in a closed clamping position of the second receiving part 5, in particular to clamp therebetween the two end (mutually parallel) external sides S2 of a rectangular
- a first of the two flat supporting surfaces mentioned is furnished by an inner side 9a, facing the beam receiving space M, of a flat clamping plate 8 which is centrally fixed (for example by a welded or glued joint) on the outer bracket part 5a of the second receiving part.
- the clamping plate 8 may for instance be made of steel.
- the outer bracket part 5a as such in this example, is of curved configuration (with a convexly curved outer side facing away from the beam receiving space M, in a closed clamping position of the second receiving part 5).
- the outer bracket part 5a may, for example, itself be provided with a flat clamping side 9a facing the beam receiving space M (in lieu of a separate clamping plate).
- a second of the two flat supporting surfaces is furnished by a second inner side, facing the beam receiving space M, of the second receiving part, which second inner side is defined by two central straight inner edges 9b of the two inner bracket parts 5b.
- each inner bracket part 5b of the second receiving part 5 extends substantially along a virtual square VS, with a lying central leg 5b 1 and two side legs 5b2 extending substantially at right angles thereto (see Fig. 4). It follows, accordingly, that the lying central legs 5b 1 in this example determine the flat beam supporting surface 9b. In Fig. 4, a distance between these supporting surfaces 9a, 9b is denoted by y2. This distance, in particular, is equal to a width xl of the rectangular beam D, at least, in the depicted beam clamping position of the coupler, to enable the beam to be stably and firmly clamped (as is represented in Figure 8). Also the mutually facing edges of the side legs 5b2 of the inner bracket parts 5b preferably extend substantially along the virtual square VS mentioned. Preferably, those edges can define respective flat beam
- y2' a distance between the mutually facing sides of the side legs 5b2 is denoted by y2'.
- This distance y2' is substantially equal to or slightly (marginally) greater than a width xl of the rectangular beam D, to enable the beam D to be placed therebetween in a stable manner.
- the present second receiving part 5 additionally comprises four substantially symmetrically disposed parallel clamping elements 7, fixed on inner sides of the bracket parts 5a, 5b, for instance by means of respective welded joints and/or glued joints.
- the clamping elements 7 comprise cylinder-shaped clamping parts, for example elements made from (steel) wire.
- Two outer clamping elements 7a are arranged at right angles to the outer bracket profile 5a of the second receiving part 5 (see Fig. 4).
- Two parallel inner clamping elements 7b are fixed at right angles to the two central legs 5b 1 of the second receiving part 5.
- the second receiving part 5 is bringable to the beam clamping position, in which clamping position the second receiving part encloses a clamping cavity M with four opposite clamping surfaces, which clamping surfaces, viewed in cross section, extend along a virtual square VS (the square mentioned has been drawn-in in Fig. 4 with broken lines).
- the parallel clamping elements 7 can fill the clamping cavity M at respective corners of the square VS, in particular for engaging longitudinal sides Si, facing away from each other, of the supporting part D.
- the distance y2, y2' between opposite sides of the virtual square VS may for instance be equal to or slightly greater than a width xl of the rectangular supporting part D.
- the virtual square VS does not have to be a 100% perfect square but, for instance, may also be a virtual rectangle, in particular if it holds that the distance y2' deviates slightly from (for example by a margin Ay and thus is slightly greater than) the distance y2.
- a distance yl, yl' between opposite sides of a pair of clamping elements 7 is, in particular, equal to or slightly greater than a thickness x2 of the rectangular supporting part D, to be able to achieve a stable positioning and firm beam clamping.
- the distance yl between the two inner clamping elements 7a on the one hand and the two outer clamping elements 7b on the other, in the case of the beam clamping position of the coupler as shown in Fig. 7 (where those clamping elements 7a clamp the beam D between them), is equal to the thickness x2 of the beam D.
- the distance yl' between the two inner clamping elements 7a mutually is substantially equal to or slightly (marginally) greater than the thickness x2 of the rectangular beam D, in order to allow the beam D to be stably placed therebetween.
- the distance yl' between the two outer clamping elements 7a mutually is substantially equal to or slightly (marginally) greater than the thickness x2 of the rectangular beam D.
- Figures 7 and 8 show the coupler 1 in two beam clamping positions, while the coupler is also fixedly clamped on a tube T of a scaffolding via the respective first receiving part 3.
- the beam D can be strongly and stably retained by the coupler.
- the second receiving part 5 can take up the position shown in Figures 3-4, or virtually exactly that position (with some margin with respect to the position shown), such that the external sides of the beam D can be retained between substantially parallel positioning surfaces (in each of the two beam positions - viewed in cross section).
- Uncoupling of the beam D can be done easily, by striking the wedge-shaped key of the second receiving part 5 to a release position, so that the second receiving part 5 can be brought to the swung-out position (not shown).
- the inner (second) bracket parts 5b of the second receiving part may, for instance, each be made of bent wire, for example of steel. The same holds for the profiles 3b to form the tube receiving part 3.
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Abstract
A scaffolding tube coupler, configured for detachably coupling it to a scaffolding tube (T) of a scaffolding, the coupler comprising a first receiving part (3) for engaging the scaffolding tube (T), which tube receiving part (3) in particular is formed by steel, substantially U-shaped profiles (3a, 3b), the coupler further comprising a second receiving part (5) configured for engaging an elongate supporting part (D) of rectangular cross section, the second receiving part (5) being configured to clamp the elongate supporting part in a first position, as well as in a second position in which the supporting part has been rotated about a longitudinal axis with respect to the first position.
Description
Title: Scaffolding tube coupler, and scaffolding system
The invention relates to a scaffolding tube coupler.
A scaffolding coupler is known from, inter alia, Dutch patents NL75.356, NL7117188 and NL7811721, and is especially suitable for easy connection of scaffolding tubes, in particular standardized scaffolding tubes according to the NEN-EN 39:2001 standard (such tubes have an external diameter of 48.3 mm). As is well known, a scaffolding is generally provided with a number of tubes (metal or steel, cylindrical tubes) mutually secured by a number of scaffolding tube couplers, in particular with standards and ledgers and generally with one or more diagonals.
With the known systems, tube clamping is effected by striking home a key (i.e., an elongate wedge-shaped clamping part), which may be part of a coupler as mentioned, or a loose part. In this manner, the scaffolding coupler can be rapidly mounted and demounted.
In certain cases, it is desired to provide the scaffolding system with other profiles or beams than (cross-sectionally) round scaffolding tubes, for example angular crossbeams. GB 1, 171, 126 shows an example of a
scaffolding tube system, including a coupler which is configured to couple a rectangular element to a smooth scaffolding tube. Use of such supporting beams affords additional possibilities to the scaffolding. Such a beam can for instance comprise a steel or iron profile, or, for example, a solid, in
particular wooden, beam, or the like.
In the systems mentioned, smooth scaffolding tubes are used (i.e., tubes without integral modular points of engagement). In addition, modular systems are known, for example the Peri Up system of PERI, having tubular standards which are configured at specific positions for coupling-on beam-shaped ledgers.
The object of the present invention is an improved scaffolding system and respective coupler. In particular, the object of the invention is a system and coupler with which non-round elements (for example,
rectangular tubular profiles) can be coupled-on stably, firmly and efficiently.
According to an aspect of the invention, to this end, the scaffolding tube coupler is characterized by the features of claim 1.
The present scaffolding tube coupler is configured for detachably coupling it to a scaffolding tube of a scaffolding, the coupler comprising a first receiving part for engaging the scaffolding tube, which tube receiving part, in particular, is formed by steel substantially U-shaped profiles, the coupler further comprising a second receiving part configured for engaging an elongate supporting part of rectangular cross section, the second receiving part being configured to clamp the elongate supporting part in two mutually different positions, the two positions comprising positions mutually rotated about a longitudinal axis (of the supporting part), in particular a first position and a second position rotated through an angle of 90 degrees.
With the present scaffolding tube coupler, a supporting beam as mentioned can be efficiently and strongly incorporated in a scaffolding, with the coupler making it possible for the beam to be securely coupled-on in two different positions. This provides the possibihty to use on site, during assembly, a most favorable supporting beam position, for example having regard to beam load and/or a supporting surface furnished by the beam.
A first supporting beam position can comprise, for example, a position in which a wide longitudinal side of the beam extends along a substantially vertical plane, while a second supporting beam position mentioned can be a position in which said wide longitudinal side of the beam extends
substantially horizontally. The desired position of the supporting beam can obviously comprise various other orientations, depending, for example, on the intended scaffolding configuration.
Further, an aspect of the invention provides a scaffolding system, comprising at least one scaffolding tube coupler according to the invention, wherein the coupler engages with the first receiving part a scaffolding tube, and with the second receiving part a rectangular supporting part, the supporting part, in particular, being held in a position mentioned of the different positions.
In this manner, the above-mentioned advantages can be achieved.
The invention will now be further elucidated on the basis of the drawing which represents non-limiting exemplary embodiments. In the drawing, in particular:
Figure 1 is a perspective side view of an exemplary embodiment of the invention, in a closed position of the clamping parts;
Figure 2 is a perspective front view of the exemplary embodiment;
Figure 3 is a side view of the example shown in Fig. 1, viewed from a first direction;
Figure 4 is a second side view of the exemplary embodiment, viewed from a direction opposite to the first direction;
Figure 5 is a bottom view of the exemplary embodiment;
Figure 6 is a top plan view of the exemplary embodiment;
Figure 7 is a perspective view of the exemplary embodiment, with a supporting part being clamped in a first supporting part position;
Figure 8 is a similar view to Fig. 7, with the supporting part being clamped in a second supporting part position;
Figure 9 is a schematic front view of a scaffolding Q; and
Figure 10 is a cross section of a supporting part, along line X-X of Figure 9.
Like or corresponding features are designated in this application with like or corresponding reference signs.
The drawing shows an example of a scaffolding tube coupler 1, which is configured for detachably coupling it to a scaffolding tube T of a
scaffolding. A part of such a tube T is visible in Figures 7 and 8. The tube T, to which the coupler 1 is fixedly clamped, can comprise, for example, a vertical standard or horizontal ledger, or, for example, a tube extending in another direction. In particular, the tube T can be a standardized
scaffolding tube, having an external diameter BD of 48.3mm, and a smooth external side, but that is not essential.
Figure 9 shows a part of a scaffolding Q, in front view, comprising such couplers 1 and respective scaffolding tubes T (for example, standards, ledgers, and optional diagonals), mutually coupled by standard tube couplers 50. Further, a supporting beam D is coupled to the scaffolding, for example a supporting beam D extending substantially in horizontal direction, which beam has a substantially rectangular cross section (see Figure 10).
The beam D has two wide longitudinal sides S 1 (facing away from each other) and two narrow longitudinal sides S2 (facing away from each other), such that a width xl of a wide longitudinal side Si is greater than a width x2 of a narrow longitudinal side S2. More particularly, the width xl of a wide longitudinal side Si is greater than the external diameter BD
(xl>BD) of a scaffolding tube T mentioned. Further, in this example, a width x2 of a narrow longitudinal side S2 is less than the external diameter BD (x2<BD). According to a further elaboration, xl/x2 is approximately equal to 2. More particularly, it may be that xl=6 cm and x2=3 cm. Thus, a crossbeam D can be used whose cross-sectional dimensions to some extent correspond to those of scaffolding tubes T to be used in the system. Other transverse dimensions of the beam D are also within the possibihties, which will be clear to those skilled in the art. Further, the beam D may for instance be of hollow design (as in the example), but this is not essential; the beam can comprise, for example, a massive wooden beam. According to an alternative implementation, for example, the beam D can comprise, for example, a ledger of a Peri Up system mentioned.
Couplers 1 are provided to fix the supporting beam D detachably to the tubes T of the scaffolding tube system Q. The beam D can for instance serve to support a horizontal walking deck V or the like. According to a further elaboration, the scaffold Q can comprise at least two mutually spaced apart supporting beams D to support a walking deck V or the like, with the supporting beams D coupled-on with respective couplers 1.
Figures 1-8 show the scaffolding tube(-supporting beam) coupler 1 in more detail. The supporting beam coupler 1 is provided with a first receiving part 3 for engaging the scaffolding tube T. The first receiving part 3 can comprise, for example, a tube clamping coupler which is conventional, at least, known per se. The tube receiving part 3, in particular, is formed by steel, substantially U-shaped profiles 3a, 3b. In particular, the first receiving part comprises at least two, mutually hingeably coupled, U-shaped bracket parts 3a, 3b (in particular, a central first - outer - bracket part 3a and two - inner - second bracket parts 3b), as follows from the drawing. The bracket parts (profiles) 3a, 3b are pivotably coupled to each other through a hinge pin 3d, namely, pivotably between the clamped position shown and a swung-apart release position, not shown. In the example, the first receiving part 3 is lockable in a clamped position by means of a key locking, i.e., via a translatable (wedge-shaped) key 3c which is bringable from a locking position as shown to a release position.
The coupler 1 is further provided with a second receiving part 5 configured for engaging an elongate supporting part/beam D (see Figures 7-10) of rectangular cross section. The second receiving part 5 may for instance be immovably fixed to the first receiving part 3 (for example, via one or more suitable welded joints), or be fixed thereto via a swivel coupler so as to allow rotation between the receiving parts 3, 5. In use of such a swivel coupler, a respective axis of rotation extends, for instance,
perpendicular with respect to a hinge pin 3d of the bracket parts 3a, 3b, which will be clear to those skilled in the art.
The second receiving part 5 preferably comprises at least two, mutually hingeably coupled, U-shaped bracket parts 5a, 5b (in particular a central first - outer - bracket part 5a and two - inner - second bracket parts 5b), as follows from the drawing. The inner bracket parts 5b may for instance directly or indirectly be fixed by undersides thereof to sides facing them of the inner tube -receiving bracket parts 3b, or to an above-mentioned swivel coupler (not shown), for instance via suitable welded joints.
The second receiving part 5 is lockable in the clamped position shown by means of a key locking, i.e., via a translatable (wedge-shaped) key 5c, to clamp first ends of the bracket parts 5a, 5b to each other. The second receiving part 5 is bringable from a locked/clamped position (as shown) to a release position (not shown), (analogously to the key locking of the first receiving part 3), for release of the beam receiving space M defined by that receiving part (for the purpose of introducing a supporting beam D into that space M or removing same therefrom). To that end, the bracket parts (profiles) 5a, 5b are pivotably coupled to each other through a respective hinge pin 5d, namely, pivotably between the clamped position shown and the swung-apart release position (not shown). The last-mentioned hinge pin 5d is situated at a second end of the bracket parts 5a, 5b, opposite the wedge-shaped key clamping means.
With great advantage, the second receiving part 5 is configured to clamp the elongate supporting part D in a first position, as well as in a second position in which the supporting part has been rotated about a longitudinal axis with respect to the first position, i.e., to clamp the supporting part in two mutually different positions, the two positions comprising positions mutually rotated about a longitudinal axis (of the supporting part), in particular a first position and a second position rotated through an angle of 90 degrees. The two clamping positions are represented in Figures 7 and 8.
The U-shaped bracket parts 5a, 5b of the second receiving part, to this end, are preferably provided with flat supporting surfaces 9a, 9b (see Fig. 3) which extend parallel relative to each other in a closed clamping position of the second receiving part 5, in particular to clamp therebetween the two end (mutually parallel) external sides S2 of a rectangular
supporting part (beam) D. In the example, a first of the two flat supporting surfaces mentioned is furnished by an inner side 9a, facing the beam receiving space M, of a flat clamping plate 8 which is centrally fixed (for example by a welded or glued joint) on the outer bracket part 5a of the second receiving part. The clamping plate 8 may for instance be made of steel. The outer bracket part 5a as such, in this example, is of curved configuration (with a convexly curved outer side facing away from the beam receiving space M, in a closed clamping position of the second receiving part 5). Alternatively, the outer bracket part 5a may, for example, itself be provided with a flat clamping side 9a facing the beam receiving space M (in lieu of a separate clamping plate).
In the example, a second of the two flat supporting surfaces is furnished by a second inner side, facing the beam receiving space M, of the second receiving part, which second inner side is defined by two central straight inner edges 9b of the two inner bracket parts 5b.
Be it noted here that each inner bracket part 5b of the second receiving part 5 as such extends substantially along a virtual square VS, with a lying central leg 5b 1 and two side legs 5b2 extending substantially at right angles thereto (see Fig. 4). It follows, accordingly, that the lying central legs 5b 1 in this example determine the flat beam supporting surface 9b. In Fig. 4, a distance between these supporting surfaces 9a, 9b is denoted by y2. This distance, in particular, is equal to a width xl of the rectangular beam D, at least, in the depicted beam clamping position of the coupler, to enable the beam to be stably and firmly clamped (as is represented in Figure 8).
Also the mutually facing edges of the side legs 5b2 of the inner bracket parts 5b preferably extend substantially along the virtual square VS mentioned. Preferably, those edges can define respective flat beam
positioning surfaces, in the case of an alternative beam positioning (as is shown in Figure 7). In Fig. 4, a distance between the mutually facing sides of the side legs 5b2 is denoted by y2'. This distance y2', in particular, is substantially equal to or slightly (marginally) greater than a width xl of the rectangular beam D, to enable the beam D to be placed therebetween in a stable manner. According to a further elaboration, it holds that y2'=y2 or y2'=y2+Ay, for example with a margin Ay of about 1 mm or less.
The present second receiving part 5 additionally comprises four substantially symmetrically disposed parallel clamping elements 7, fixed on inner sides of the bracket parts 5a, 5b, for instance by means of respective welded joints and/or glued joints. With these additional, parallel clamping elements 7, an improved stable engagement of the four external sides SI, S2 of the supporting beam D can be achieved, as already follows from the drawing. In the present implementation, the clamping elements 7 comprise cylinder-shaped clamping parts, for example elements made from (steel) wire. Two outer clamping elements 7a are arranged at right angles to the outer bracket profile 5a of the second receiving part 5 (see Fig. 4). Two parallel inner clamping elements 7b are fixed at right angles to the two central legs 5b 1 of the second receiving part 5. These two inner clamping elements 7b can furnish additional stiffness and strength to the second receiving part 5, besides a beam positioning thereby achieved, but this is not essential.
As follows from the above, and has already been mentioned, the second receiving part 5 is bringable to the beam clamping position, in which clamping position the second receiving part encloses a clamping cavity M with four opposite clamping surfaces, which clamping surfaces, viewed in cross section, extend along a virtual square VS (the square mentioned has
been drawn-in in Fig. 4 with broken lines). The parallel clamping elements 7 can fill the clamping cavity M at respective corners of the square VS, in particular for engaging longitudinal sides Si, facing away from each other, of the supporting part D.
The distance y2, y2' between opposite sides of the virtual square VS may for instance be equal to or slightly greater than a width xl of the rectangular supporting part D. Be it noted here that the virtual square VS does not have to be a 100% perfect square but, for instance, may also be a virtual rectangle, in particular if it holds that the distance y2' deviates slightly from (for example by a margin Ay and thus is slightly greater than) the distance y2.
A distance yl, yl' between opposite sides of a pair of clamping elements 7 is, in particular, equal to or slightly greater than a thickness x2 of the rectangular supporting part D, to be able to achieve a stable positioning and firm beam clamping.
According to a further elaboration, the distance yl between the two inner clamping elements 7a on the one hand and the two outer clamping elements 7b on the other, in the case of the beam clamping position of the coupler as shown in Fig. 7 (where those clamping elements 7a clamp the beam D between them), is equal to the thickness x2 of the beam D.
According to a further elaboration, the distance yl' between the two inner clamping elements 7a mutually is substantially equal to or slightly (marginally) greater than the thickness x2 of the rectangular beam D, in order to allow the beam D to be stably placed therebetween. According to a further elaboration, it holds that yl'=yl or yl -yl+Ay, for example with a margin Ay of about 1 mm or less. Likewise, it is advantageous if the distance yl' between the two outer clamping elements 7a mutually is substantially equal to or slightly (marginally) greater than the thickness x2 of the rectangular beam D. Here too, according to a further elaboration, it holds
that yl'=yl or yl -yl+Ay, for example with a margin Ay of about 1 mm or less.
Figures 7 and 8 show the coupler 1 in two beam clamping positions, while the coupler is also fixedly clamped on a tube T of a scaffolding via the respective first receiving part 3. In both cases, the beam D can be strongly and stably retained by the coupler. Here, in both beam positions (both in Figure 7 and in Figure 8), the second receiving part 5 can take up the position shown in Figures 3-4, or virtually exactly that position (with some margin with respect to the position shown), such that the external sides of the beam D can be retained between substantially parallel positioning surfaces (in each of the two beam positions - viewed in cross section).
Uncoupling of the beam D can be done easily, by striking the wedge-shaped key of the second receiving part 5 to a release position, so that the second receiving part 5 can be brought to the swung-out position (not shown).
To the skilled person, it will be clear that the invention is not limited to the exemplary embodiments described. Various modifications are possible within the scope of the invention as is set forth in the appended claims.
Thus, the inner (second) bracket parts 5b of the second receiving part may, for instance, each be made of bent wire, for example of steel. The same holds for the profiles 3b to form the tube receiving part 3.
Claims
1. A scaffolding tube coupler, configured for detachably coupling it to a scaffolding tube (T) of a scaffolding, the coupler comprising a first receiving part (3) for engaging the scaffolding tube (T), which tube receiving part (3) in particular is formed by steel substantially U-shaped profiles (3a, 3b), the coupler further comprising a second receiving part (5) configured for engaging an elongate supporting part (D) of rectangular cross section, characterized in that the second receiving part (5) is configured to clamp the elongate supporting part in a first position, as well as in a second position in which the supporting part has been rotated about a longitudinal axis with respect to said first position.
2. A scaffolding tube coupler according to claim 1, wherein the second receiving part (5) is bringable to a supporting part clamping position, in which clamping position the second receiving part encloses a clamping cavity with four opposite clamping surfaces, which clamping surfaces, viewed in cross section, extend along a first virtual square.
3. A scaffolding tube coupler according to claim 2, wherein the second receiving part (5) is provided with one or more clamping elements (7) to fill the clamping cavity at respective corners of the square, in particular for engaging longitudinal sides, facing away from each other, of the supporting part (D).
4. A scaffolding tube coupler according to claim 2 or 3, wherein a distance between opposite sides of the clamping elements (7) is equal to or slightly greater than a thickness (x2) of the rectangular supporting part (D), in particular in a closed clamping position of the second receiving part.
5. A scaffolding tube coupler according to any one of claims 2-4, wherein the distance between opposite sides of the virtual square is equal to
or slightly greater than a width (xl) of the rectangular supporting part (D), in particular in a closed clamping position of the second receiving part.
6. A scaffolding tube coupler according to claim 1, wherein the second receiving part comprises four symmetrically disposed, parallel clamping elements (7).
7. A scaffolding tube coupler according to claim 6, wherein the clamping elements (7) comprise cylinder-shaped clamping parts.
8. A scaffolding tube coupler according to any one of the preceding claims, wherein the second receiving part is lockable in a clamping position by means of a key locking.
9. A scaffolding tube coupler according to any one of the preceding claims, wherein the second receiving part comprises two mutually hingeably coupled U-shaped bracket parts, wherein the U-shaped bracket parts are provided with two flat supporting surfaces which extend parallel relative to each other in a closed clamping position of the second receiving part, in particular to clamp therebetween end external sides of said rectangular supporting part (D).
10. A scaffolding system, comprising at least one scaffold tube coupler according to any one of the preceding claims, wherein the coupler engages with the first receiving part a scaffolding tube, and with the second receiving part a rectangular supporting part (D).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19828890.4A EP3870778A1 (en) | 2018-10-22 | 2019-10-22 | Scaffolding tube coupler, and scaffolding system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2021847 | 2018-10-22 | ||
NL2021847A NL2021847B1 (en) | 2018-10-22 | 2018-10-22 | Scaffolding tube coupling, as well as scaffolding system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020085900A1 true WO2020085900A1 (en) | 2020-04-30 |
Family
ID=66049632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2019/050693 WO2020085900A1 (en) | 2018-10-22 | 2019-10-22 | Scaffolding tube coupler, and scaffolding system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3870778A1 (en) |
NL (1) | NL2021847B1 (en) |
WO (1) | WO2020085900A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7425488B2 (en) | 2021-06-07 | 2024-01-31 | 株式会社国元商会 | Clamp for attaching separate parts |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL75356C (en) | ||||
GB313341A (en) * | 1928-07-09 | 1929-06-13 | Scaffolding Great Britain Ltd | Improvements in or connected with coupling devices for connecting scaffolding and like tubes and rods together |
BE484912A (en) * | 1947-10-08 | 1948-10-14 | John Burton | Improvements made to connections for the assembly of temporary constructions |
GB1171126A (en) | 1966-06-11 | 1969-11-19 | Burton Delingpole & Company Lt | Improvements in or relating to Scaffolding Clamps |
NL7117188A (en) | 1971-12-15 | 1973-06-19 | ||
NL7811721A (en) | 1978-11-29 | 1980-06-02 | Mulder Rudolf | Scaffolding tube clamp unit - has tube seats with hinged clamp brackets secured by wedges permanently held in pivoted wedge holders |
NL8800573A (en) * | 1988-03-08 | 1989-10-02 | Alprokon Promotie Ontwikk Bv | Rail support clamp construction - has clamp secured to support, and rail retained by screw |
GB2227053A (en) * | 1989-01-12 | 1990-07-18 | Melvyn Wilde | A clamp for elongate members |
DE19720187A1 (en) * | 1997-05-14 | 1998-11-19 | Stefan Dipl Ing Quentin | Clamp for square section tubing |
-
2018
- 2018-10-22 NL NL2021847A patent/NL2021847B1/en active
-
2019
- 2019-10-22 WO PCT/NL2019/050693 patent/WO2020085900A1/en unknown
- 2019-10-22 EP EP19828890.4A patent/EP3870778A1/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL75356C (en) | ||||
GB313341A (en) * | 1928-07-09 | 1929-06-13 | Scaffolding Great Britain Ltd | Improvements in or connected with coupling devices for connecting scaffolding and like tubes and rods together |
BE484912A (en) * | 1947-10-08 | 1948-10-14 | John Burton | Improvements made to connections for the assembly of temporary constructions |
GB1171126A (en) | 1966-06-11 | 1969-11-19 | Burton Delingpole & Company Lt | Improvements in or relating to Scaffolding Clamps |
NL7117188A (en) | 1971-12-15 | 1973-06-19 | ||
NL7811721A (en) | 1978-11-29 | 1980-06-02 | Mulder Rudolf | Scaffolding tube clamp unit - has tube seats with hinged clamp brackets secured by wedges permanently held in pivoted wedge holders |
NL8800573A (en) * | 1988-03-08 | 1989-10-02 | Alprokon Promotie Ontwikk Bv | Rail support clamp construction - has clamp secured to support, and rail retained by screw |
GB2227053A (en) * | 1989-01-12 | 1990-07-18 | Melvyn Wilde | A clamp for elongate members |
DE19720187A1 (en) * | 1997-05-14 | 1998-11-19 | Stefan Dipl Ing Quentin | Clamp for square section tubing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7425488B2 (en) | 2021-06-07 | 2024-01-31 | 株式会社国元商会 | Clamp for attaching separate parts |
Also Published As
Publication number | Publication date |
---|---|
NL2021847B1 (en) | 2020-05-13 |
EP3870778A1 (en) | 2021-09-01 |
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