EP2314797A1 - Echafaudage - Google Patents

Echafaudage Download PDF

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Publication number
EP2314797A1
EP2314797A1 EP10167640A EP10167640A EP2314797A1 EP 2314797 A1 EP2314797 A1 EP 2314797A1 EP 10167640 A EP10167640 A EP 10167640A EP 10167640 A EP10167640 A EP 10167640A EP 2314797 A1 EP2314797 A1 EP 2314797A1
Authority
EP
European Patent Office
Prior art keywords
brace
pin
cradle
quick
expandable dowel
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.)
Granted
Application number
EP10167640A
Other languages
German (de)
English (en)
Other versions
EP2314797B1 (fr
Inventor
Giorgio Turrisi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gierre Srl
Original Assignee
Gierre Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gierre Srl filed Critical Gierre Srl
Priority to EP10167640A priority Critical patent/EP2314797B1/fr
Publication of EP2314797A1 publication Critical patent/EP2314797A1/fr
Application granted granted Critical
Publication of EP2314797B1 publication Critical patent/EP2314797B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/16—Struts or stiffening rods, e.g. diagonal rods
    • 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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/28—Scaffolds primarily resting on the ground designed to provide support only at a low height
    • E04G1/30—Ladder scaffolds
    • 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
    • E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
    • E04G7/303—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are only fixed at one of the bars or members to connect
    • E04G7/304—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are only fixed at one of the bars or members to connect with tying means for connecting the bars or 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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/28—Scaffolds primarily resting on the ground designed to provide support only at a low height
    • E04G1/30—Ladder scaffolds
    • E04G2001/302—Ladder scaffolds with ladders supporting the platform
    • E04G2001/305—The ladders being vertical and perpendicular to the platform

Definitions

  • the present invention relates to a moving scaffold.
  • Moving scaffolds are moving structures mainly used for small building works such as plastering or painting.
  • the moving scaffolds or cradles of known type are tubular structures made of aluminium or steel, having varying base sizes proportional to the height to which a work is to be made. Typically, these cradles are used for finish or servicing works at heights in the range of between 2 to 20 metres.
  • the moving scaffold can be provided with at least one pair of wheels enabling the assembly to be moved manually and at will in the worksite.
  • Cradles comprise a frame consisting of two pairs of vertical side shoulders with steps or rungs and at least one pair of horizontal crosspieces connecting the two pairs of vertical shoulders with each other.
  • a stiffening element supports the articulated quadrilateral defined by the frame and prevents the structure from bending.
  • the stiffening elements are tie-rods or braces for example, that are disposed cross-wise in an oblique orientation and connect the shoulders to each other.
  • At least one flat support surface on which the operators stand is placed in a transverse direction relative to the side shoulders.
  • the vertical shoulders In the vicinity of, or at each rung, the vertical shoulders have holes aligned with the rung axis, for connection of the tie-rods.
  • the tie-rods are tubular metal bars terminating at both ends with a slot.
  • Each slot is able to be disposed axially superposed on said hole of the vertical shoulder, to which it is connected by a suitable fastening element.
  • the latter can be a key or a knob with a threaded shank to maintain connection between tie-rod and vertical shoulder.
  • the key is generally a metal element comprising a pivot and a suitably shaped portion.
  • the pivot is fitted through the tie-rod slot and one of the holes provided in the shoulder.
  • the shaped portion is coupled to the vertical shoulder preventing disengagement of the tie-rod from the rest of the structure.
  • the fastening element can be a knob having a threaded shank to be screwed down within a threaded seat formed through the slot and the hole at the rung.
  • the fastening element is an additional component of the scaffold with which further elements such as spacers or safety latches are to be possibly associated.
  • the present invention aims at proposing a cradle that can be assembled in a quick and simple manner, while at the same time ensuring high safety levels.
  • Document FR 2 927 919 A1 proposes a moving scaffold in which the tie-rod ends are fastened to the shoulders by a quick-fit mechanism permanently connected to each end of each tie-rod.
  • a moving scaffold or cradle which comprises the features present in one or more of the appended claims.
  • a moving scaffold in accordance with the present invention has been generally identified with reference numeral 1.
  • the moving scaffold 1 commonly referred to as cradle, is defined by a frame having a tubular metal structure and comprising at least two pairs of vertical side shoulders 2 disposed parallel to each other and having a plurality of horizontal steps or rungs 3.
  • each rung is fitted into through openings obtained by cutting in the respective side shoulders 2, and fastened therein by riveting and/or welding.
  • the vertical shoulders 2 therefore have holes inside which a housing 8 is formed which can be utilised for connection with further structural elements.
  • Housing 8 communicates with the outside through an opening axially in alignment with the respective rung 3.
  • the frame defining the moving scaffold 1 further comprises at least one pair of horizontal crosspieces 4 connecting the pairs of vertical side shoulders 2 with each other.
  • a flat support surface 5 or platform which preferably rests on a pair of rungs 3 and on which the operators work.
  • the frame of cradle 1 is an articulated quadrilateral; therefore the presence of at least one tie-rod or brace 6 acting as a stiffening element is required, said brace being diagonally disposed between the pairs of side shoulders 2.
  • Brace 6 is connected to the side shoulders 2 at two respective rungs 3, placed at different heights, by a quick-fit mechanism 7 permanently connected to each end 6b of brace 6.
  • each brace 6 has an axial extension orthogonal to the axis 6a of brace 6, and is inserted into the housing 8 of a predetermined rung 3.
  • brace 6 has a through hole 13 at each of its ends 6b.
  • two or more braces 6 disposed cross-wise can be present.
  • Brace 6 can be a metal bar having a rectangular section Figs. 2-4 and 6 ) or a round bar ( Figs. 5 and 7 ).
  • an insert 20 ( Fig. 4 ) of plastic material is positioned at the end 6b of each brace 6, which insert is adapted to fill the inner empty space at the end 6b of brace 6, making brace 6 stiffer at that exact point and being a support for it.
  • brace 6 at its ends 6b is acted upon by a compression force.
  • brace 6 In the second case, shown in Figs. 5 and 7 , the end 6b of brace 6 is flattened, by pressing for example. Therefore, due to the particular conformation, use of filling elements is not required.
  • the quick-fit mechanism 7 comprises an elastically-deformable expandable dowel 9 to be axially fitted into housing 8 formed in the shoulder, at the rung 3 to which the brace 6 is to be connected.
  • the expandable dowel 9 is connected to the end 6b of brace 6 by a pin 10 slidably inserted into the expandable dowel 9.
  • Pin 10 has a flanged, i.e. enlarged, head 10b pressing the expandable dowel 9 against one side of brace 6 so as to deform it.
  • Pin 10 extends along an axis 10a transverse to the longitudinal axis 6a of the respective brace 6.
  • pin 10 passes through the end 6b of brace 6, inside hole 13, and has an end portion 10c, opposite to the flanged head 10b, that projects from brace 6.
  • a spacer 11, slidably passed through by pin 10 is present between the expandable dowel 9 and the side of brace 6.
  • the quick-fit mechanism 7 further comprises quick locking/unlocking means 12, connected to pin 10 and in particular to the end 10c of pin 10.
  • the quick locking/unlocking means 12 is movable between an activation position ( Fig. 3 ) at which the expandable dowel 9 is deformed and firmly locked within housing 8, and a deactivation position ( Fig. 2 ) at which the expandable dowel 9 is in a rest position and can be disengaged from housing 8.
  • the locking/unlocking means 12 comprises a lever 14 connected by a peg 23 to the end 10c of pin 10.
  • Lever 14 is able to rotate around a hinge axis 15 transverse to the axis 10a of pin 10.
  • lever 14 causes the axial displacement of pin 10 towards lever 14 and the consequent compression of the expandable dowel 9 between the head 10b of pin 10 and the side of brace 6.
  • lever 14 has an end cam 16 that, by interfering against the side of brace 6 during rotation of lever 14, causes the simultaneous moving apart of the hinge axis 15 from said brace 6. Following this movement, lever 14 pulls pin 10 and causes axial sliding of same.
  • the expandable dowel 9 compressed between the flanged head 10b of pin 10 and spacer 11, expands in the radial direction, i.e. a direction orthogonal to the axis 10a of pin 10, interfering by friction with the inner walls of housing 8.
  • This swelling causes locking of mechanism 7, and particularly of the expandable dowel 9, inside the housing, and ensures a steady and permanent connection between brace 6 and the vertical shoulders 2.
  • brace 6 is acted upon by compression, following rotation of lever 14 and sliding of pin 10. Therefore in case of a rectangular-section brace ( Figs. 2-6 ), it is preferred and also advantageous that the stiffening insert 20 be introduced at the end 6b, thus giving the brace 6 a structural support due to the compression caused by the expandable dowel 9 and pin 10.
  • the brace of circular section ( Fig. 5 ) has a flat end 6b also provided with a hole 13.
  • spacer 11 between the brace 6 and expandable dowel 9 can be advantageously present inside the quick-fit mechanism 7, to eliminate possible level differences between the various elements.
  • spacer 11 placed between the expandable dowel 9 and brace 6
  • a further spacer 22 is placed which is located between brace 6 and lever 14.
  • each housing 8 has a perimetric enlargement 16 obtained following a riveting and/or welding operation for example, carried out during the step of securing the end of rung 3 to the respective side shoulder 2.
  • the enlargement 16 creates a mechanical interference with the compressed expandable dowel 9 so as to avoid accidental disengagement of said expandable dowel 9.
  • the cradle 1 can further comprise a safety device 17 maintaining the connection between the brace 6 and the vertical side shoulder 2 even when the expandable dowel 9, although inserted in housing 8, is not deformed.
  • This safety device 17 comprises a suitably shaped plate hinged on the axis 10a of the mechanism 7.
  • the plate comprises a U-shaped portion 18 that, under work conditions, encompasses the vertical shoulder 2 to which brace 6 is connected.
  • the plate can be positioned in the work condition, following an angular rotation around its hinging axis 10a, starting from a rest condition shown in Fig. 4 at which the U-shaped portion 18 is released from the vertical shoulder 2, so as to enable transverse movement of brace 6 for insertion and extraction of the expandable dowel 9 into and from housing 8.
  • Figs. 6 to 7 differ from the previously described ones due to the structure of the locking/unlocking means 12 comprising, instead of lever 14, a knob (114) connected to a corresponding end 10c of pin 10 opposite to the flanged head 10b.
  • the flanged head 10b is defined by a threaded nut 115a operatively engaged on the corresponding end of pin 10 and acting against the expandable dowel 9 after interposition of a washer 115b.
  • the knob 114 is adapted to be rotated about the geometric axis 10a, possibly together with pin 10, to promote axial sliding of the pin itself and consequent compression of the expandable dowel 9 between the head 10b and brace 6.
  • cam devices 116 are operatively interposed between the brace 6 and knob 114 to pull pin 10 and cause axial sliding of same, following rotation of the knob around axis 10a.
  • the cam devices 116 preferably comprise at least one counter-lug 119 forward projecting from the knob 114 towards the brace 6, in parallel to axis 10a.
  • the counter-lug 119 operates in slidable-rest relationship on a helical projection 120 extending around axis 10a of pin 10.
  • two counter-lugs 119 are present which are diametrically opposite relative to axis 10a and cooperage with respective helical projections 120 carried by an abutment plate 121 interposed between the brace 6 and knob 114 and slidably passed through by pin 10.
  • the abutment plate 121 can be provided with rotation-preventing protrusions 122 acting against opposite side walls of brace 6 to avoid undesirable rotations of the plate itself around axis 10a during operation of knob 114.
  • the abutment plate 121 may be provided with at least one rotation-preventing peg (not shown in the drawings) designed to be fitted into a respective hole 122a formed in the end of brace 6.
  • a mere angular rotation of lever 14 or of knob 114 ensures the steady connection of the brace to the rest of the frame, without running the risk of accidental separations.
  • the quick-fit mechanism is permanently connected to the brace, in such a manner that accidental losses of structural elements during the dismantling and transport steps cannot occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP10167640A 2009-10-22 2010-06-29 Echafaudage Not-in-force EP2314797B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10167640A EP2314797B1 (fr) 2009-10-22 2010-06-29 Echafaudage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09425419A EP2314796A1 (fr) 2009-10-22 2009-10-22 Echafaudage
EP10167640A EP2314797B1 (fr) 2009-10-22 2010-06-29 Echafaudage

Publications (2)

Publication Number Publication Date
EP2314797A1 true EP2314797A1 (fr) 2011-04-27
EP2314797B1 EP2314797B1 (fr) 2012-01-04

Family

ID=41719344

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09425419A Withdrawn EP2314796A1 (fr) 2009-10-22 2009-10-22 Echafaudage
EP10167640A Not-in-force EP2314797B1 (fr) 2009-10-22 2010-06-29 Echafaudage

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09425419A Withdrawn EP2314796A1 (fr) 2009-10-22 2009-10-22 Echafaudage

Country Status (2)

Country Link
EP (2) EP2314796A1 (fr)
AT (1) ATE540179T1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3070701A1 (fr) * 2017-09-06 2019-03-08 Cdh Group Systeme de fixation d'un raidisseur et/ou d'un garde-corps a un echafaudage apte a faciliter l'acces a un plancher de l'echafaudage
CN110145110A (zh) * 2019-05-10 2019-08-20 中国三冶集团有限公司 一种盘扣式脚手架

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3068375B1 (fr) * 2017-06-28 2021-10-08 Cdh Group Dispositif de fixation d'une piece de renfort sur un echafaudage, echafaudage muni d'un tel dispositif
EP4098892A1 (fr) * 2021-05-31 2022-12-07 Dedalo Tech Societa' a Responsabilita' Limitata Semplificata Broche de verrouillage pour des structures d'échafaudage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1568237A (fr) * 1968-03-11 1969-05-23
DE1559006A1 (de) * 1965-06-30 1969-08-21 Juculano Theodore Charles Vorrichtung zum leicht loesbaren Verbinden der Staender und Fuellstaebe von Geruesten
DE10245743A1 (de) * 2002-10-01 2004-04-15 Peri Gmbh Zerlegbares Gerüst
EP1686221A2 (fr) * 2004-12-29 2006-08-02 Centaure Dispositif de montage pour pieces d'echafaudage
FR2927919A1 (fr) 2008-02-25 2009-08-28 Centaure Sa Element d'echafaudage et ensemble d'echafaudage comprenant un tel element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1559006A1 (de) * 1965-06-30 1969-08-21 Juculano Theodore Charles Vorrichtung zum leicht loesbaren Verbinden der Staender und Fuellstaebe von Geruesten
FR1568237A (fr) * 1968-03-11 1969-05-23
DE10245743A1 (de) * 2002-10-01 2004-04-15 Peri Gmbh Zerlegbares Gerüst
EP1686221A2 (fr) * 2004-12-29 2006-08-02 Centaure Dispositif de montage pour pieces d'echafaudage
FR2927919A1 (fr) 2008-02-25 2009-08-28 Centaure Sa Element d'echafaudage et ensemble d'echafaudage comprenant un tel element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3070701A1 (fr) * 2017-09-06 2019-03-08 Cdh Group Systeme de fixation d'un raidisseur et/ou d'un garde-corps a un echafaudage apte a faciliter l'acces a un plancher de l'echafaudage
CN110145110A (zh) * 2019-05-10 2019-08-20 中国三冶集团有限公司 一种盘扣式脚手架

Also Published As

Publication number Publication date
EP2314797B1 (fr) 2012-01-04
ATE540179T1 (de) 2012-01-15
EP2314796A1 (fr) 2011-04-27

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