EP0024865A1 - Gerüstverbindung - Google Patents

Gerüstverbindung Download PDF

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Publication number
EP0024865A1
EP0024865A1 EP80302839A EP80302839A EP0024865A1 EP 0024865 A1 EP0024865 A1 EP 0024865A1 EP 80302839 A EP80302839 A EP 80302839A EP 80302839 A EP80302839 A EP 80302839A EP 0024865 A1 EP0024865 A1 EP 0024865A1
Authority
EP
European Patent Office
Prior art keywords
wedge
bracket
lug
joint according
scaffolding joint
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.)
Ceased
Application number
EP80302839A
Other languages
English (en)
French (fr)
Inventor
Raymond Ernest Steele
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.)
Rapid Metal Developments Ltd
Original Assignee
Rapid Metal Developments Ltd
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 Rapid Metal Developments Ltd filed Critical Rapid Metal Developments Ltd
Publication of EP0024865A1 publication Critical patent/EP0024865A1/de
Ceased 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
    • 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

  • This invention relates to a scaffolding joint for use in connecting together a pair of scaffolding members, such as an upright and a horizontal member or transom, for example, of a scaffolding structure.
  • the joint of the invention is of the general kind, hereinafter referred to as "the kind specified” comprising a lug for attachment to one of the members, a complementary bracket for attachment to the other member, the lug and bracket respectively providing surfaces which are interengaged when the joint is assembled in order to interconnect the two members, and a wedge member which is mounted in the lug or bracket so as to be movable relative thereto between an operative locking position in which said interengageable surfaces of the lug and bracket are forced tightly into engagement with each other and an inoperative position in which disengagement of said surfaces is permitted.
  • a common problem with scaffolding joints of the general kind specified as proposed hitherto is that, when the bracket and lug are disengaged, it is difficult to ensure that the wedge is retained in a position permitting easy and rapid re-engagement of the bracket and lug since despite the use of various devices for retaining the wedge in a desired retracted position, these have not always been found to be entirely reliable in so retaining the wedge and are often, moreover, inconvenient to use. This can make it difficult and time consuming to connect scaffolding members together, particularly in the very common arrangement where brackets are connected to the respective ends of a horizontal member and it is necessary to ensure that the wedges of a pair of joints are positioned correctly to facilitate the engagement simultaneously of both brackets with their corresponding lugs.
  • An object of the invention is to provide an improved scaffolding joint of the kind specified in which the aforementioned problems are alleviated or avoided.
  • the bracket or lug in a scaffolding joint of the kind specified, is provided with a guiding surface arranged for co - operation with a surface of the wedge during retraction of the latter to guide the wedge into a predetermined retracted position in which the lug and bracket can be readily interengaged, and retention means are provided to act between the wedge and the bracket or lug to retain the wedge firmly in said retracted position.
  • the retention means is constituted by interengageable retention surfaces respectively on the lug or bracket and wedge; conveniently the retention surface of the wedge and the surface of the wedge co-operating with the guiding surface are both on a formation carried by the wedge and may face in different directions which are conveniently at 90° one to the other.
  • FIGS. 1 and 2 of the drawing show part of a scaffolding structure as used, for example, for building purposes, and including an upright member 1 and a transverse member 2, both in the form of cylindrical tubes which are connected together by a joint of the invention indicated generally at 3.
  • the joint includes a lug 4 secured to the upright member 1 and a bracket 5 secured as by welding to the member 2 and embracing part of the lug, the lug and bracket being firmly locked in operative relationship by a wedge 6.
  • the upright 1 is provided at intervals along its length with sets of four lugs 4 at the same height and equi-spaced therearound, to enable up to four transverse members 2 to be mounted thereon, as required.
  • the lugs could alternatively be arranged at different heights.
  • the lugs are either secured directly to the tube 1 as shown, by welding for example, or formed on a collar secured around the tube.
  • Each lug is of generally T-shaped cross-section with the web 7 of the T secured to the upright and the cross bar 8 of the T forming outwardly extending flanges 9 and 10 which are formed by pressing to provide protrusions 11 at either side and in a central region thereof.
  • the web 7 increases in width upwardly so that the flanges 9 and 10 are inclined to the longitudinal axis of the tube 1, preferably by about 5°.
  • the lower end portions 13 of the flanges 9 and 10 are bent inwardly and secured to the external surface of the upright 1 for additional rigidity and to serve as supports for the bracket 5 in some forms of the joint, although not in the one illustrated.
  • the bracket 5 of the joint is a tubular formation of generally rectangular cross section, the side 5A thereof being inclined to the side 5B carrying the member 2 at the same angle of inclination as that of the lug cross bar 8 to the upright 1.
  • the side 5A also has a centrally located longitudinal slot 14 therein, open at the bottom and closed at the top, as seen in Figure 2 permitting the bracket 5 to be located over the lug 4 with the web 7 disposed within the slot and the closed end 14A of the slot resting on the upper edge of the web.
  • locking of the joint is effected by forcing the wedge 6 through the bracket between a wedging surface 15 of the bracket (split into upper and lower portions by removal of material at 16 for economy) and the protrusions 11 of the lug 4•
  • the upper and lower portions of the wedging surface 15 provide areas of contact with the wedge respectively above and below the protrusions 11 of the lug, thereby ensuring a positive locking action by the wedge.
  • slot 14 it would be possible for the slot 14 to extend continuously from the top to the bottom of the side 5A so as to be open at both of its ends. In this case, the lower edge of bracket 5 would rest on the lower end portions 13 of the flanges 9 and 10.
  • the wedge will be seen to comprise a solid tongue 17, the lower end of which is connected to a generally-H-shaped . formation 18 of which the arms 19 are interconnected by a thin web 20, the formation being stiffened by a rib 21.
  • the side edges 19A of the arms 19 at one side of the wedge are chamfered at 19B, typically at 45°, to form the wedging surfaces of the wedge for engagement with the protrusions 11 of the lug, the outer surfaces of which are correspondingly angled.
  • the side edges 19C at the opposite side of the wedge are plain and engage the surface portions 15 of the bracket when the wedge is in its operative position.
  • bracket causes a force to be exerted on the bracket such as to urge the wall portions 5A of the bracket at either side of the slot 14 into tight engagement with the rear faces of the flanges 9 and 10, thereby firmly to interconnect the bracket and lug and thus the members 1 and 2.
  • the wedge When the joint is in its released condition, it is advantageous to be able to retain the wedge in a retracted position, as shown in Figures 2 (left-hand side) and 4, and to ensure that the wedge, when so retracted, will always be disposed in a position in which it does not obstruct insertion of the cross bar of the lug within the bracket.
  • the wedge also has formations 22 projecting respectively from either side thereof and having thereon guide surfaces 23 and retention surfaces 24.
  • the bracket is formed with a pair of guide surfaces 25 on the opposed walls thereof transverse to that carrying the wedging surface 15, and these co-operate with the guide surfaces 23 whenever the wedge is retracted with its lower end in a position which would obstruct entry of the lug into the bracket as aforesaid.
  • Retraction of the wedge with the guide surfaces 23 and 25 in engagement constrains the wedge to move across the bracket so that, when fully retracted, it is sufficiently spaced from the side 5A of the bracket to permit entry of the lug into the bracket.
  • the wedge when fully retracted, would be approximately in the position shown at the left-hand side of Figure 2, resting against the upper wedging surface portion 15 of the bracket.
  • the bracket For retention of the wedge in its retracted position, the bracket is provided with a pair of opposed wedging surfaces 26 for co-operation with the wedging surfaces 24 of the wedge when the latter is in its retracted position.
  • the joint of the invention can be particularly advantageous when, for example, a pair of joint brackets are secured respectively to the ends of a horizontal member 2, as is quite common in practice and illustrated in Figure 6.
  • a pair of joint brackets are secured respectively to the ends of a horizontal member 2, as is quite common in practice and illustrated in Figure 6.
  • With the joint of the invention it becomes a simple matter to raise the wedges to retracted positions, where they are retained and to engage the brackets onto lugs, as required.
  • the wedge is conveniently provided with a downwardly projecting tongue 30 which is of sufficient length that it always projects from the bracket 5 when the wedge is in its retracted position, enabling the wedge to be dislodged from that position, when desired, by an upward blow on the tongue.
  • lugs 4 formed with protrusions 11 on the flanges 9,10
  • other forms of lug may be used having, for example, straight flanges with bevelled faces for engagement by the wedge surfaces 19.
  • a group of four lugs are shown, any convenient number of lugs from one upwards may be provided.
  • the lugs may be spaced equally around the scaffolding member or arranged assymmetrically, both circumferentially and vertically.
  • the member 2 secured to the bracket 5 may take alternative forms such as an 'L' or inverted 'T' angle member, the horizontal flanges of which may be used to support planking for walkways.
  • the wedge may be provided with a formation, such as a lug or pip, arranged to prevent the wedge 6 from falling out of the bracket 5 when loosely located therein.
  • An alternative non-symmetrical form of wedge could be generally channel shaped, with the base of the channel bearing against the wedging surfaces 15 of the bracket and the free edges of the sides of the channel bearing against the protrusions 11, or equivalent parts, of the lug to provide the main joint wedging action.
  • the wedge surface for co-operation with the guiding surface of the bracket or lug may then be provided on one or both sides of the channel and, when the retention means for the retracted wedge is constituted by interengageable retention surfaces respectively on the lug or bracket and wedge, such surface on the wedge may also be on one or both sides of the channel.
  • the guide and retention surfaces would be on protrusions formed on the channel sides similar to those shown at 22 in Figures 3 and 4, although not necessarily arranged for reversibility of the wedge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP80302839A 1979-08-24 1980-08-18 Gerüstverbindung Ceased EP0024865A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7929596 1979-08-24
GB7929596 1979-08-24

Publications (1)

Publication Number Publication Date
EP0024865A1 true EP0024865A1 (de) 1981-03-11

Family

ID=10507423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302839A Ceased EP0024865A1 (de) 1979-08-24 1980-08-18 Gerüstverbindung

Country Status (3)

Country Link
EP (1) EP0024865A1 (de)
AU (1) AU6166980A (de)
IE (1) IE50048B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984002371A1 (en) * 1982-12-08 1984-06-21 Harry Karlsson Device for interconnecting vertical and horizontal elements
US5504076A (en) * 1989-09-04 1996-04-02 Pfizer Inc. Cephalosporin compounds

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1180562A (en) * 1966-04-29 1970-02-04 Kwikform Ltd Improvements in or relating to Builders Scaffolding
GB1310529A (en) * 1969-09-25 1973-03-21 Rapid Metal Developments Ltd Joint for use in scaffolding
GB1405416A (en) * 1971-11-19 1975-09-10 Evans & Sons Ltd C Scaffold structures
GB1427012A (en) * 1972-10-13 1976-03-03 Evans & Sons Ltd C Scaffold and like structures
GB1427011A (en) * 1972-10-13 1976-03-03 Evans & Sons Ltd C Scaffold structures
FR2371560A1 (fr) * 1976-11-17 1978-06-16 Rapid Metal Developments Ltd Raccord d'echafaudage et procede de fabrication de ce raccord

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1180562A (en) * 1966-04-29 1970-02-04 Kwikform Ltd Improvements in or relating to Builders Scaffolding
GB1310529A (en) * 1969-09-25 1973-03-21 Rapid Metal Developments Ltd Joint for use in scaffolding
GB1405416A (en) * 1971-11-19 1975-09-10 Evans & Sons Ltd C Scaffold structures
GB1427012A (en) * 1972-10-13 1976-03-03 Evans & Sons Ltd C Scaffold and like structures
GB1427011A (en) * 1972-10-13 1976-03-03 Evans & Sons Ltd C Scaffold structures
FR2371560A1 (fr) * 1976-11-17 1978-06-16 Rapid Metal Developments Ltd Raccord d'echafaudage et procede de fabrication de ce raccord

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984002371A1 (en) * 1982-12-08 1984-06-21 Harry Karlsson Device for interconnecting vertical and horizontal elements
US5504076A (en) * 1989-09-04 1996-04-02 Pfizer Inc. Cephalosporin compounds

Also Published As

Publication number Publication date
IE50048B1 (en) 1986-02-05
AU6166980A (en) 1981-03-05
IE801780L (en) 1981-02-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE DE FR NL

17P Request for examination filed

Effective date: 19810909

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19831011

RIN1 Information on inventor provided before grant (corrected)

Inventor name: STEELE, RAYMOND ERNEST