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EP0427448A2 - Baugerüst - Google Patents

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Publication number
EP0427448A2
EP0427448A2 EP90311919A EP90311919A EP0427448A2 EP 0427448 A2 EP0427448 A2 EP 0427448A2 EP 90311919 A EP90311919 A EP 90311919A EP 90311919 A EP90311919 A EP 90311919A EP 0427448 A2 EP0427448 A2 EP 0427448A2
Authority
EP
European Patent Office
Prior art keywords
pin
latch
end fitting
aperture
scaffolding element
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
EP90311919A
Other languages
English (en)
French (fr)
Other versions
EP0427448A3 (en
EP0427448B1 (de
Inventor
David James Hannay
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.)
LEADA ACROW LIMITED (REG. N 891748)
Original Assignee
LEADA ACROW Ltd (Reg n 891748)
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 LEADA ACROW Ltd (Reg n 891748) filed Critical LEADA ACROW Ltd (Reg n 891748)
Publication of EP0427448A2 publication Critical patent/EP0427448A2/de
Publication of EP0427448A3 publication Critical patent/EP0427448A3/en
Application granted granted Critical
Publication of EP0427448B1 publication Critical patent/EP0427448B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04G7/308—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 without 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
    • 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
    • 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
    • E04G7/32—Scaffolding bars or members with non-detachably fixed coupling elements with coupling elements using wedges

Definitions

  • This invention relates to scaffolding.
  • scaffolding systems have been developed in which the scaffolding elements, usually metal tubes, are interconnected by captive fittings, rather than by separate clamps. These systems provide improved speed of erection and striking, improved safety, and increased life.
  • An object of the present invention is to provide a simple, compact and reliable means of interconnecting scaffold elements, in particular for connecting elongate scaffold elements to other elements.
  • the invention is particularly applicable to the connection of diagonal braces to horizontal ledgers, but is also applicable to the interconnection of other elements of a scaffold structure, e.g. braces to adjustable base and head jacks; horizontal and inclined members to form cantilever brackets; plan braces, etc.
  • an elongate scaffolding element or an end fitting for such an element, is provided with a transverse pin, for insertion in an aperture provided in another scaffolding element or fitting, and a resiliently loaded latch is housed within the pin, having a first position in which its resilient loading urges the latch to a position in which at least a portion of the latch protrudes laterally from the pin adjacent the free end of the pin for retaining the pin in the aperture, the latch further having a retracted position in which it is accommodated entirely or substantially entirely within the pin against its resilient loading, for permitting the pin to be inserted in and removed from the aperture.
  • the latch has an oblique lead-in surface in its projecting portion, such that when the pin is inserted in the aperture, the aperture wall will push the latch into the pin, permitting the pin to be inserted without action by the user to retract the latch.
  • the latch For removing the pin from the aperture, the latch may be retracted by the user pressing its projecting portion into the pin.
  • a distinct operating member is provided for retracting the latch, preferably located at or adjacent the end of the pin remote from the projecting portion of the latch.
  • the means providing the resilient bias is preferably housed entirely within the pin or within an end fitting on which the pin is provided.
  • the member in which the aperture is provided, adjacent the aperture, may have a configuration to enhance retention by the latch and reduce the risk of accidental movement of the latch to its retracted position.
  • the invention is particularly but not exclusively applicable to coplanar scaffold systems, that is to say, systems in which uprights, ledgers and braces can all lie in common vertical planes.
  • Figure 1 shows part of a scaffolding structure comprising an upright 1, a horizontal ledger 3, and a diagonal brace 6, e.g. generally as in GB 2149046.
  • the ledger has an end fitting 7, comprising upper and lower eyes 8 and upper and lower arms 9 in each of which is a vertical slot.
  • the upright is provided with laterally projecting sockets 10 all at the same level.
  • the ledger In use, the ledger is placed so that its upper and lower arms 9 embrace a socket 10 between them, and a wedge 2 accommodated in the slots of arms 9 is dropped through the socket 10 to retain the ledger.
  • the wedge is held captive, when raised clear of the socket 10, by a nib 4 on the upper eye 8.
  • the ledger and upright are in a common vertical plane, rather than being laterally offset as in scaffolding systems in which the corresponding members are attached to one another by screw clamps.
  • the brace 6 is provided with an end fitting 5 by which it is attached to an eye 8 of the ledger end fitting.
  • the brace end fitting 5 is shown in more detail in Figures 2 and 3. It comprises a weldable malleable cast iron body with a generally annular region or boss 11 for welding to the brace end. Offset to one side of the axis of the boss and therefore of the brace, is an integral bracket portion 12. This is so placed that when its side face abuts on a side of an eye 8, the brace will lie in the same vertical plane as the ledger.
  • the bracket portion 12 has a circular aperture in which is firmly mounted a pin 13 which is perpendicular to and intersects the longitudinal axis of the brace.
  • This pin is for example of drawn seamless steel tube, welded into the bracket portion 12. It fits closely in an eye 8 in order to couple the brace to the ledger, and it has a free end projecting through the eye. This free end is closed by a tapered plastics plug 14, which provides a lead-in surface to facilitate insertion of the pin in the eye, and prevents dirt from entering that end of the pin.
  • a hook-like latch member 15 for example of sheet mild steel.
  • the latch member 15 has a hooked projecting nib 16, in a slot 17 provided in the wall of the pin.
  • the latch member extends to the other end of the pin, adjacent which it is mounted on a transverse Bissell pin 16 seated in opposite walls of the brace end pin 13.
  • the pin 16 acts as a pivot for the latch member 15, which can accordingly move between the position illustrated in Figure 2 in which the nib 16 projects from the side of the pin 13, and a retracted position in which the nib is completely within the pin 13.
  • a torsion spring 17 is mounted on the pivot pin 16 and acts between an internal surface of the brace end pin 13 and the latch member 15, urging the latter to the position illustrated in Figure 2 with the nib 16 projecting.
  • the latch Adjacent the pivot pin 16, the latch has an integral operating arm 18 which projects laterally from the pin 13 through a slot in the wall of the latter as best shown in Figure 3.
  • the arm 18 projects in the direction towards the brace 6, and is disposed between a pair of protective ribs or flanges 19 on the brace end fitting. These ribs or flanges are provided with matching holes 20, in which a split pin or the like may be inserted, to prevent the arm 18 from being moved from the position illustrated in Figure 2, i.e. to prevent accidental or malicious release of the pin 13 from the eye.
  • the latch nib 16 normally projects from the side of the brace end pin 13.
  • the nib 16 has a tapered lead-in surface, such that, when the pin 13 is pushed into an eye 8, the lead-in surface of the nib will engage the side of the eye and push the latch nib into the pin 13, without any action by the user other than inserting the pin 13 into the eye.
  • the nib 16 is now clear of the opposite side of the eye 8 and the spring 17 causes it to snap outwards so that the nib 16 projects from the pin and engages the surface of the eye as shown in Figure 2, positively retaining the pin 13 in the eye.
  • the sides of the ledger end fitting, adjacent the latch nib, may be dished or recessed as shown at 21, to provide a retaining surface at an angle of 90° or more to a line extending from the pivot pin 16 to the tip of the latch nib, to improve retention of the latch. It is also desirable that the surface of the latch nib which abuts on the eye (the upper surface in Figure 2) is concave, centred on the pivot pin 16.
  • the arm 18 is pressed towards the brace tube (downwards in Figure 2) and this causes the latch nib 16 to be withdrawn into the pin 13 against the action of spring 17.
  • the pin 13 can then be withdrawn from the eye 8. This operation can be carried out with one hand.
  • the resilient bias for the latch can be provided in other ways, for example by a leaf spring, coil spring or a pad of rubber.
  • the latch member itself may take any convenient form.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Earth Drilling (AREA)
  • Ladders (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Movable Scaffolding (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Insertion Pins And Rivets (AREA)
EP90311919A 1989-11-01 1990-10-31 Baugerüst Expired - Lifetime EP0427448B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8924624 1989-11-01
GB8924624A GB2238571B (en) 1989-11-01 1989-11-01 Scaffolding

Publications (3)

Publication Number Publication Date
EP0427448A2 true EP0427448A2 (de) 1991-05-15
EP0427448A3 EP0427448A3 (en) 1992-03-04
EP0427448B1 EP0427448B1 (de) 1995-01-11

Family

ID=10665538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90311919A Expired - Lifetime EP0427448B1 (de) 1989-11-01 1990-10-31 Baugerüst

Country Status (6)

Country Link
EP (1) EP0427448B1 (de)
AT (1) ATE117040T1 (de)
DE (1) DE69015976T2 (de)
GB (1) GB2238571B (de)
IE (1) IE76462B1 (de)
PT (1) PT95763B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118438A1 (de) * 1990-06-12 1991-12-19 Leada Acrow Ltd Verbindungsanordnung an einem geruest
EP0489599A1 (de) * 1990-12-06 1992-06-10 LEADA ACROW LIMITED (Reg. n 2766044) Gerüstvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122365A1 (en) * 2005-05-19 2006-11-23 Innovative Construction Techniques Pty Ltd A joining system
CN105178586A (zh) * 2015-07-16 2015-12-23 成都佳美嘉科技有限公司 一种建筑用脚手架斜拉固定板

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434373A1 (de) * 1960-03-01 1968-11-14 Loeb S A Vorrichtung zum Sichern von auf Zapfen aufschiebbaren Huelsen,OEsen od.dgl.
DE2748113A1 (de) * 1977-10-27 1979-05-03 Kwikform Ltd Baugeruest
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
GB2149046A (en) * 1983-10-11 1985-06-05 Giltrain Limited Scaffolding structure
WO1988003212A1 (en) * 1986-10-28 1988-05-05 Lubeca Contruction Systems Pty. Ltd. Scaffolding system
GB2197418A (en) * 1986-11-06 1988-05-18 Grayston Central Services Scaffolding elements and joints thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB457495A (en) * 1938-08-09 1936-11-30 Arthur William Chapman Improvements relating to mechanism for locking relatively slidable members, such as slidable seats of vehicles
GB1113091A (en) * 1965-02-03 1968-05-08 Sidney Geoffrey Young Measuring instrument
JPS5423865A (en) * 1977-07-25 1979-02-22 Sumitomo Electric Ind Ltd Locking device of pin
GB2161883B (en) * 1984-08-03 1987-09-30 Latchways Ltd Releasable connector device
US4828442A (en) * 1987-12-23 1989-05-09 Avibank Mfg Inc Spring form captive panel fastener assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434373A1 (de) * 1960-03-01 1968-11-14 Loeb S A Vorrichtung zum Sichern von auf Zapfen aufschiebbaren Huelsen,OEsen od.dgl.
DE2748113A1 (de) * 1977-10-27 1979-05-03 Kwikform Ltd Baugeruest
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
GB2149046A (en) * 1983-10-11 1985-06-05 Giltrain Limited Scaffolding structure
WO1988003212A1 (en) * 1986-10-28 1988-05-05 Lubeca Contruction Systems Pty. Ltd. Scaffolding system
GB2197418A (en) * 1986-11-06 1988-05-18 Grayston Central Services Scaffolding elements and joints thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118438A1 (de) * 1990-06-12 1991-12-19 Leada Acrow Ltd Verbindungsanordnung an einem geruest
EP0489599A1 (de) * 1990-12-06 1992-06-10 LEADA ACROW LIMITED (Reg. n 2766044) Gerüstvorrichtung

Also Published As

Publication number Publication date
EP0427448A3 (en) 1992-03-04
EP0427448B1 (de) 1995-01-11
IE76462B1 (en) 1997-10-22
PT95763B (pt) 1998-07-31
ATE117040T1 (de) 1995-01-15
DE69015976D1 (de) 1995-02-23
GB2238571A (en) 1991-06-05
GB8924624D0 (en) 1989-12-20
DE69015976T2 (de) 1995-05-11
GB2238571B (en) 1994-03-09
IE903921A1 (en) 1991-05-08
PT95763A (pt) 1992-06-30

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