EP0972894A1 - Gerüstgeländer und seine Befestigungsvorrichtung - Google Patents

Gerüstgeländer und seine Befestigungsvorrichtung Download PDF

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Publication number
EP0972894A1
EP0972894A1 EP99420161A EP99420161A EP0972894A1 EP 0972894 A1 EP0972894 A1 EP 0972894A1 EP 99420161 A EP99420161 A EP 99420161A EP 99420161 A EP99420161 A EP 99420161A EP 0972894 A1 EP0972894 A1 EP 0972894A1
Authority
EP
European Patent Office
Prior art keywords
stud
pawl
railing
slot
spring
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.)
Withdrawn
Application number
EP99420161A
Other languages
English (en)
French (fr)
Inventor
Franck Pascoletti
Gérard Chevalier
André Peronnier
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.)
COMABI
Original Assignee
COMABI
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 COMABI filed Critical COMABI
Publication of EP0972894A1 publication Critical patent/EP0972894A1/de
Withdrawn legal-status Critical Current

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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
    • E04G5/14—Railings
    • 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
    • E04G7/306—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect
    • E04G7/307—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect with tying means for connecting the bars or members

Definitions

  • the present invention relates generally to scaffolding, and it relates more particularly to a railing scaffolding as well as the device for fixing this railing to the remaining from the scaffolding structure.
  • Scaffolding is usually made up of a metal structure and floors, attached to this structure to different levels.
  • the operators who work on the floors are protected from a fall to the outside by railings, which are in the form of bars arranged horizontally at approximately 1 meter and 0.5 meter in height, above the edge of the floor, and connected to the scaffolding structure.
  • the tubular posts 1 of the frames 2, forming the structure of the scaffolding, carry cylindrical tubular elements 3 of axis vertical, called “sockets", welded longitudinally on each post 1, in being distributed at regular intervals along this post 1.
  • the sockets 3 are usually welded in diametrically positions opposite, with respect to post 1, unless they are grouped by four and arranged, in this case, at regular angular intervals of 90 ° all around the posts 1.
  • Guardrails 4 to be fixed above each floor scaffolding 5, each have a horizontal tube 6, at the ends opposite which are arranged respectively two tubular studs 7, welded perpendicular to the longitudinal direction of the tube 6, and located in the same plane.
  • the frames 2, whose posts 1 carry the sockets 3, are generally arranged at a distance corresponding to the length of a railing 4, so that the railing 4 can, thanks to the studs 7 provided at its ends, come and engage in sockets 3 correspondents belonging to two consecutive 2 frames, and located at same height on one side (especially the outer side) of the scaffolding.
  • the installation of a railing 4 is achieved by simultaneously engaging its two studs 7, directed towards the bottom, in the corresponding sockets 3, this by a vertical movement oriented from top to bottom (see arrow F).
  • the diameter outside of the studs 7 must here be less than the inside diameter of the sockets 3, and to ensure a good connection, the studs 7 must have a length greater than that of the sockets 3.
  • the studs 7 are usually fitted with safety catches called positive action, i.e. it is necessary to activate voluntarily each pawl, to release it from its safety position normally occupied, and then be able to freely remove the railing 4.
  • the pawl consists of a "rocker" 8, articulated around a transverse axis 9 in the part lower of the stud 7, the rocker 8 being partially housed inside of said stud 7, from which it exits through the open lower end 10 and also by a side slit 11, opening at the lower edge of the stud 7.
  • the articulation axis 9 is eccentric relative to the center of gravity G of the rocker 8, so that at rest, the rocker 8 occupies the stable position shown in Figure 2.
  • the rocker 8 then comes to contact of the lower edge of the stud 7, at a point A, and the weight P of the rocker 8 exerts, with respect to axis 9, a torque which maintains the rocker 8 in this position.
  • the stable position considered of the rocker 8 is an inclined position, in which a portion of said rocker 8 laterally protrudes from the stud 7, through the slot 11 of the stud 7, forming a beak (see Figure 2).
  • rocker 8 It remains possible, thanks to a manual action exerted on the lower part of rocker 8 (see figure 3), to rotate this rocker according to arrow F1 to put it in an upright position, in the axis of stud 7, so that rocker 8 no longer projects laterally through the slot 11. It then becomes possible to release the stud 7 of the socket 3, by a vertical sliding movement, oriented from bottom to top (arrow F2).
  • Such a device requires simultaneous intervention two people, to remove the railing 4.
  • a first operator must be placed at one end of the railing 4, to rotate the rocker 8 and disengage the stud 7 from the bush 3, at this end, while a second operator performs the same manipulations to the other end of the railing 4. From the point of view of productivity, this operation is very penalizing, because it requires two operators to clear each railing, while it is a component relatively light, weighing less than 5 Kg.
  • the components of scaffolding are generally hot dip galvanized, i.e. these parts are immersed in a zinc bath heated to around 500 ° C, to ensure good rust protection.
  • this galvanizing operation is carried out prior to mounting the rocker.
  • the galvanizing operation is rarely carried out in the manufacture of scaffolding, and many manipulations are necessary to bring the railings back to the factory and fix the rockers.
  • the hinge pin 9 of each rocker 8 is constituted in practice by a rivet, the crimping of which on the stud 7 is made by riveting machines which sometimes break the protective layer of zinc, under the action of their punches. The local absence of zinc, which results, creates on the studs 7 areas susceptible to rust.
  • US Patent No. 5,400,870 discloses a system which has a partial analogy with that of the invention, but which does not apply to the fixing of scaffolding railings on posts of a structure scaffolding.
  • This document only concerns a system for vertical scaffolding frames, and more particularly a system for connecting the tubular uprights of such frames between them.
  • the device of the aforementioned US patent has a lock or ratchet in the shape of a "U", with two branches of length uneven, the smallest branch forming a ramp and the largest branch with a catch notch and also used to manual operation.
  • This connection device also requires three openings, i.e.
  • the present invention aims to remedy the drawbacks previously exposed, providing a scaffolding railing provided with a fixing device which allows the guardrail to be removed by a single operator, while ensuring the required security, and which removes the zinc alterations on the studs and the risk of rust resulting therefrom, by a solution leading to a particular structure and / or use simple.
  • the invention relates to a railing scaffolding and its fixing device, the railing comprising a horizontal tube at opposite ends of which are arranged two tubular studs, perpendicular to the longitudinal direction of the tube, each stud being provided without being vertically engaged in a corresponding socket, carried by a post of the structure the scaffolding, and ratchet-like means being provided for lock each stud on the corresponding socket, when the railing is put in place, said means being constituted, for each tubular stud, by a ratchet partially housed inside the stud but not mechanically linked to the stud, and mounted sliding in a non-opening side slot in the stud, the ratchet having the shape of a trapezoidal plate, the large base of which is facing the railing tube, the height of the pawl being slightly less than the length of the lateral slot of the stud, and this pawl being subjected to the action of a spring housed inside the stud and urging it ratchet in the direction of its
  • a first stable position said locking, in which the pawl appears laterally projecting on the stud through the slot, the vertical sliding of the stud engaged in a socket being prevented in this position, and a second stable position known as unlocking, in which the pawl is partially pressed inside the stud, against the action of the spring, and comes into contact with the lower part of the stud slot, this position allowing the vertical movement of the stud release relative to the corresponding socket.
  • the spring which requests the pawl is made in the form of a leaf spring folded in "U” and housed inside the tubular stud, a branch of the leaf spring in "U” carrying the pawl, and the other branch of this leaf spring being pressed against the inner wall of the stud, opposite the slot, without mechanical connection with said stud.
  • the railing object of the invention can not only be put in place, but also removed by a single operator, the operation of dismantling the railing being carried out first placing the pawls in the stable unlocking position, both ends of the railing, then lifting the railing to release the two studs of the corresponding sockets. As for the position of locking, this provides the required safety against lifting untimely.
  • each pawl and by the associated spring in particular shaped as a U-shaped leaf spring, is not mechanically linked to the stud but simply introduced by the end open bottom of the stud, so that the pawl is lodged "naturally" in the slot of the stud, while the spring ensures the retaining the ratchet while allowing limited movement, as well in radial direction than in axial direction (with reference to the stud tubular).
  • the assembly is particularly simple, and does not require no mechanical assembly that could cause local alterations zinc plating of the stud.
  • the railing 4 object of the invention shown partially in Figures 4 to 7, includes as already described a tube horizontal 6, at the two ends of which studs 7 are welded, perpendicular to the longitudinal direction of the tube 6.
  • Each stud 7 has the shape of a sleeve, the outside diameter of which is less than inside diameter of a socket 3 into which it must be introduced (the socket 3 being here shown alone, without indication of the post which door).
  • Stud 7 has a slot in its lower part lateral 12 not emerging at its lower edge, formed in a generator.
  • a pawl 13 shaped of trapezoidal platinum, the large base of which faces upwards, i.e. towards the tube 6, the height of the pawl 13 being slightly less than the length of the slot 12.
  • the pawl 13 is fixed, for example by welding or by crimping, on one of the branches 14a of a leaf spring 14 folded not "U", and housed inside the stud 7, the curved part 14b of the leaf spring 14 being turned upwards.
  • the assembly formed by the pawl 13 and by the leaf spring 14 is not mechanically linked to stud 7. This assembly is simply initially introduced by the open lower end 10 of the stud 7, and it is held in place by engaging the pawl 13 in the slot 12, as well as by the elastic pressure and the friction of the second branch 14c of the leaf spring 14 against the inner wall of the stud 7, opposite of the slot 12.
  • the pawl 13, thus formed and mounted, has two positions stable, namely a locking position and a unlocking, shown respectively in FIGS. 5 and 6.
  • the unlocking position (figure 6) is obtained from the previous locking position, exerting manually on the pawl 13 a pushing action along arrow F3, tending to push in the pawl 13 through the slot 12, against the action of the leaf spring 14.
  • the pawl 13 is then housed inside the stud 13, in a stable position where this pawl 13 is in contact, by its edge oblique, with the lower part of the slot 12 at point E.
  • the pawl 13 protrudes still outside of stud 7, but it no longer prevents sliding vertical of the stud 7 relative to the sleeve 3.
  • the contact of the pawl 13, at C, with the lower edge of the sleeve 3 no longer constitutes a blocking point, because the pawl 13, no longer in abutment (at point D), can still slide deeper inside the stud 7, until completely erase, further compressing the leaf spring 14. The vertical movement of release of the stud 7 is thus authorized.
  • FIG. 7 illustrates this movement of disengaging the stud 7, during which the pawl 12, pushed back inside the stud 7, slides the along the inner wall of the sleeve 3, during the vertical movement of the stud 7 according to arrow F4.
  • the leaf spring 14 which has been previously strongly compressed brings the pawl 13 back into position fully extended, and thus the pawl 13 is positioned again automatically in stable locking position.
  • the disassembly of a railing 4 can therefore be performed by a single operator, by following these steps:
  • the two pawls 13, located respectively at the two ends of the railing 4 and being in locking position, are put in the stable unlocking position.
  • the operation is carried out successively, at one end of the railing 4 then at the other end, by the same operator.
  • this operator proceeds to lifting the guardrail 4, grabbing it in the middle region of the tube 6, the overall vertical movement of the railing 4, directed from below at the top, accompanied by the release of the two studs 7 opposite the corresponding 3 sockets.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP99420161A 1998-07-15 1999-07-12 Gerüstgeländer und seine Befestigungsvorrichtung Withdrawn EP0972894A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9809178A FR2781242B1 (fr) 1998-07-15 1998-07-15 Garde-corps d'echafaudage et son dispositif de fixation
FR9809178 1998-07-15

Publications (1)

Publication Number Publication Date
EP0972894A1 true EP0972894A1 (de) 2000-01-19

Family

ID=9528742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99420161A Withdrawn EP0972894A1 (de) 1998-07-15 1999-07-12 Gerüstgeländer und seine Befestigungsvorrichtung

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EP (1) EP0972894A1 (de)
FR (1) FR2781242B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008015410A1 (en) * 2006-07-31 2008-02-07 Safestand Limited Stabiliser for builders' trestles
CN106592946A (zh) * 2016-12-23 2017-04-26 苏州飞华铝制工业有限公司 大型建筑用组合式模块化脚手架

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473388A (en) * 1945-03-08 1949-06-14 Safway Steel Products Inc Tubing coupler
US2847259A (en) * 1956-03-29 1958-08-12 David E Beatty Scaffold brace fastening means
BE777175A (fr) * 1971-12-22 1972-04-17 Travaux Hydrauliques Et Entrep Cadre d'etanconnement.
FR2347508A1 (fr) * 1976-04-06 1977-11-04 Entrepose Procede pour assurer la securite des operations de montage et de demontage de l'ossature d'un echafaudage. dispositif pour le mettre en oeuvre
US4188143A (en) * 1978-04-05 1980-02-12 Matsura Norio Device for retaining scaffold member
FR2504215A1 (fr) * 1981-04-21 1982-10-22 Duarib Sa Dispositif de verrouillage d'un element tubulaire sur lequel est emmanche un autre element tubulaire
DE9411951U1 (de) * 1994-07-22 1994-09-22 G.F Merker-Rivela, 42697 Solingen Steckverbindung
US5400870A (en) * 1991-06-24 1995-03-28 Alinco, Inc. Scaffolding frame system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562127A1 (fr) 1984-03-30 1985-10-04 Comabi Sa Procede d'assemblage d'elements d'echafaudage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473388A (en) * 1945-03-08 1949-06-14 Safway Steel Products Inc Tubing coupler
US2847259A (en) * 1956-03-29 1958-08-12 David E Beatty Scaffold brace fastening means
BE777175A (fr) * 1971-12-22 1972-04-17 Travaux Hydrauliques Et Entrep Cadre d'etanconnement.
FR2347508A1 (fr) * 1976-04-06 1977-11-04 Entrepose Procede pour assurer la securite des operations de montage et de demontage de l'ossature d'un echafaudage. dispositif pour le mettre en oeuvre
US4188143A (en) * 1978-04-05 1980-02-12 Matsura Norio Device for retaining scaffold member
FR2504215A1 (fr) * 1981-04-21 1982-10-22 Duarib Sa Dispositif de verrouillage d'un element tubulaire sur lequel est emmanche un autre element tubulaire
US5400870A (en) * 1991-06-24 1995-03-28 Alinco, Inc. Scaffolding frame system
DE9411951U1 (de) * 1994-07-22 1994-09-22 G.F Merker-Rivela, 42697 Solingen Steckverbindung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008015410A1 (en) * 2006-07-31 2008-02-07 Safestand Limited Stabiliser for builders' trestles
CN106592946A (zh) * 2016-12-23 2017-04-26 苏州飞华铝制工业有限公司 大型建筑用组合式模块化脚手架

Also Published As

Publication number Publication date
FR2781242B1 (fr) 2001-01-12
FR2781242A1 (fr) 2000-01-21

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