GB2421538A - Brace for builders trestles - Google Patents

Brace for builders trestles Download PDF

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Publication number
GB2421538A
GB2421538A GB0428244A GB0428244A GB2421538A GB 2421538 A GB2421538 A GB 2421538A GB 0428244 A GB0428244 A GB 0428244A GB 0428244 A GB0428244 A GB 0428244A GB 2421538 A GB2421538 A GB 2421538A
Authority
GB
United Kingdom
Prior art keywords
brace
trestle
latch
trestles
component
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
GB0428244A
Other versions
GB0428244D0 (en
GB2421538B (en
Inventor
Liam Clear
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.)
Safestand Ltd
Original Assignee
Safestand 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 Safestand Ltd filed Critical Safestand Ltd
Priority to GB0428244A priority Critical patent/GB2421538B/en
Publication of GB0428244D0 publication Critical patent/GB0428244D0/en
Priority to ES06111486T priority patent/ES2321132T3/en
Priority to PL06111486T priority patent/PL1700973T3/en
Priority to PCT/GB2005/001622 priority patent/WO2005124057A1/en
Priority to DK06111479T priority patent/DK1700972T3/en
Priority to DK05737864T priority patent/DK1660738T3/en
Priority to DE602005013482T priority patent/DE602005013482D1/en
Priority to PL05737864T priority patent/PL1660738T3/en
Priority to DE602005009465T priority patent/DE602005009465D1/en
Priority to PT05737864T priority patent/PT1660738E/en
Priority to DE602005009482T priority patent/DE602005009482D1/en
Priority to AT06111486T priority patent/ATE426717T1/en
Priority to PT06111486T priority patent/PT1700973E/en
Priority to AU2005254758A priority patent/AU2005254758A1/en
Priority to AT06111479T priority patent/ATE407275T1/en
Priority to EP06111482A priority patent/EP1696084A1/en
Priority to DK06111486T priority patent/DK1700973T3/en
Priority to ES05737864T priority patent/ES2314651T3/en
Priority to EP06111488A priority patent/EP1700974A1/en
Priority to US11/630,174 priority patent/US8794381B2/en
Priority to CA002570528A priority patent/CA2570528A1/en
Priority to AT05737864T priority patent/ATE407274T1/en
Priority to ES06111479T priority patent/ES2314824T3/en
Priority to PL06111479T priority patent/PL1700972T3/en
Priority to EP06111479A priority patent/EP1700972B1/en
Priority to EP06111486A priority patent/EP1700973B1/en
Priority to EP06111490A priority patent/EP1698744A1/en
Priority to PT06111479T priority patent/PT1700972E/en
Priority to EP05737864A priority patent/EP1660738B1/en
Priority to IE20050866A priority patent/IE20050866A1/en
Publication of GB2421538A publication Critical patent/GB2421538A/en
Application granted granted Critical
Publication of GB2421538B publication Critical patent/GB2421538B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • E04G1/32—Other free-standing supports, e.g. using trestles
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

A stabilising brace 10 for fitment between builders' trestles has a fixed formation 12 at one end engageable with a first trestle at a first angle and is rotatable to a second angle at which it locks the brace to the first trestle, the brace having at its other end a movable latch (14, Figures 4, 5, 8, 9) for locking the brace to a second trestle. The fixed formation may comprise a pin 16 engageable in a hole 20 formed in the trestle pedestal base 22, and a claw 18 which moves behind a part 24 of the trestle base as the brace 10 is rotated, to prevent withdrawal of the pin 10. The movable latch 14 may comprise a pin 26 engageable in a hole 32 in a trestle upright 30, and a rotatable claw 28 which can be positioned to prevent withdrawal of the pin 26.

Description

BRACE FOR BUILDERS' TRESTLES This invention relates to a brace for
builders' trestles of the kind shown for example in UK patent specification No. 2378978. The applicants have developed a trestle system in accordance with this patent, which is marketed as the SafeStand 1200 Access System. This is designed to provide a strong and safe working platfonii at heights of approximately 0.5 - 3.0 rn, as a more convenient alternative to scaffolding. Two or more trestles are used in a line to support scaffolding boards which make up the working platform. Integral guard rail supports and other safety features such as "anti-flip" brackets to support board overhangs are provided.
Although performance of the existing system is a great improvement on traditional "bandstands", it has been found that a further increase in trestle stability would be desirable, particularly when the trestles are used at or near their maximum height. Accordingly, the present invention provides a stabilising brace for fitment between builders' trestles, the brace having at one end a fixed formation engageable with a first trestle at a first angle and being rotatable to a second angle at which the fixed formation locks the brace to the first trestle, the brace having at its other end a movable latch for locking the brace to a second trestle.
Preferably the latch is captive on the brace so that there are no separate parts that could get lost. The latch secures the brace at the second angle to the first trestle, so not only does the latch lock the brace other end to the second trestle, but it also ensures that the fixed formation is locked to the first trestle. This locking arrangement is effective and simple to use, without tools or specialist skills. In the locked position, the brace preferably extends diagonally in a vertical plane between the first and second trestles so as to stabilise them against swaying.
The fixed formation may comprise a first component laterally engageable with the first trestle to provide a pivot point for the brace, and a second component which moves behind a part of the first trestle as the brace is rotated from the first to the second angle, so as to prevent lateral disengagement of the first formation. In one embodiment, the first component comprises a laterally extending pin or spigot engageable in a corresponding hole formed in a part of the first trestle; the second component comprising a claw which extends laterally across the first trestle part as the pin engages in the hole and which engages behind the trestle part to prevent withdrawal of the pin from the hole as the brace is rotated from the first to the second angle. The trestle part in this embodiment is a diagonal strut foniiing part of the first trestle's pedestal base, but other locations for the hole are also possible, for example in an upright part of the pedestal base.
The movable latch somewhat similarly may comprise a first component laterally engageable with the second trestle, and a second component which is rotatable to engage behind a part of the second trestle so as to prevent lateral disengagement of the first component. In one embodiment the latch first component comprises a lateral pin or spigot, engageable in a corresponding hole formed in the second trestle, for example in a telescopic part of the trestle's upright. This hole may he a hole normally used to lock the telescopic upright at a selected height, or may be specially provided for reception of the brace's lateral pin. The latch second component comprises a rotatable claw. Preferably the rotatable claw is held by gravity in engagement behind the second trestle part, for example resting on the distal end of the pin, which protrudes through the second trestle part. Again, this latching arrangement is robust, reliable and simple to operate, requiring no tools or specialist skills.
An Illustrative embodiment of the invention is described below with reference to the drawings, in which: Figure 1 is a general view of the brace; Figure 2 is a side view the brace fixed formation shown on a larger sca]e; Figure 3 is a view of the brace fixed formation in the lateral direction, colTesponding to Figure 2; Figures 4 and 5 are views of the movable latch, corresponding to Figures 2 and 3 respectively; Figure 6 shows the fixed formation engaged with the first trestle part with the brace at the first angle, with Figure 7 being a corresponding view with the brace at the second angle; Figure 8 shows the movable latch partly engaged with the second trestle part; Figure 9 shows the movable latch fully engaged, and Figure 10 is a general view showing braces locked in position between trestles.
As a further development of the SafeStand 1200 Access System it has been recognised that stability whilst in use at the upper limits of its height, can be enhanced by the introduction of braces 10 as shown in Figure 1.
In order to remain sympathetic to the design concept of the SafeStand system the mechanics of the connection of the brace to the trestles have been specifically designed so that there are no free or loose connection parts that can become detached and the method of fixing the brace to the stand remains a non-skilled work activity.
The braces are fitted diagonally between adjacent trestles (see also Figure 10); one end of the brace having a fixed "pin-and-claw" arrangement 12; the entire brace being offered up and rotated into position to lock this end into place; a pin and rotating claw being used to lock the other end 14 to its trestle.
As shown more clearly in Figures 2, 3, 6 and 7 the fixed "pin-and-claw" arrangement 12 consists of a pin 1 6 which fits through a pre-dril]ed hole 20 in the pedestal base 22 of the trestle, creating a rotating fixing between the brace and the trestle. The claw 18 of the arrangement 1 2 is specifically designed so as to allow the pin to be inserted in the designated hole 20 in the base 22 of the trestle, only when the brace is inclined at a specific temporary position at a first angle relative to the base 22 as shown in Figure 6. Once the pin connection is made to the base of the trestle, the brace 10 is rotated such that a pin connection can he made to the adjacent trestle, using the other end 14 of the brace 10 as further described below.
In carrying out this rotation action the "claw" 1 8 engages around and behind the inclined member 24 of the base of the trestle (see Figure 7) such that once the brace reaches its final (second) angle relative to the trestle base, the "claw" 1 8 prevents the brace from being accidentally removed, by preventing withdrawal of the pin 1 6 from the hole 20 whilst the trestle is in use.
The pin 26 and rotating claw 28 arrangement at the other end 14 of the brace 10 shown in Figures 4, 5 and 8 allows a pinned connection to be made to the vertical upright 30 of the trestle through a predrilled locating hole 32. Once the pin 26 is engaged in the hole 32, the rotating claw 28 can be rotated to engage around and behind the upright 30 so as to rest under its own weight against the end of the pin 26 where it protrudes from the hole 32. In this resting position as shown in Figure 9, the brace cannot be accidentally removed by withdrawal of the pin 26 from the hole 32.
The hole 32 may be the hole at the upper end of the trestle base, through which a locking pin is introduced into a corresponding hole in a telescopic upper part of the trestle, to hold the upper part at a given extension. Thus the pin 26 on the brace upper end 14 may also serve as this locking pin. Preferably however, the pin 26 is engaged in one of the unoccupied locking holes in the trestle upper part. Alternatively, the pin 26 may engage in a hole specifically provided in the trestle upper or lower part, for fitment of the brace.
Figure 1 0 shows a line of trestles interconnected by braces embodying the invention. The braces extend diagonally between adjacent trestles and co-operate with the scaffolding boards forming the working platform (not shown) to stabilise the trestles against swaying in the in- line direction. Each trestle also includes integrally welded diagonal braces 34 for added stability transversely of the working platform. Crossed braces 1 Oa, I 0b may be provided between adjacent trestles at one or both sides, or individual braces may he provided between selected neighbouring trestles in the line, according to need. The brace is therefore simple to use, adaptable, robust and reliable.

Claims (13)

1. A stabilising brace for fitment between builders' trestles, the brace having at one end a fixed forn-iation engageable with a first trestle at a first angle and being rotatable to a second angle at which the fixed formation locks the brace to the first trestle, the brace having at its other end a movable latch for locking the brace to a second trestle.
2. A brace as defined in claim I, in which the latch is captive on the brace.
3. A brace as defined in claim I or 2, in which the latch secures the brace at the second angle to the first trestle.
4. A brace as defined in any preceding claim, in which, in the locked position, the brace extends diagonally in a vertical plane between the first and second trestles.
5. A brace as defined in any preceding claim, in which the fixed formation comprises a first component laterally engageahie with the first trestle to provide a pivot point for the brace, and a second component which moves behind a part of the first trestle as the brace is rotated from the first to the second angle, so as to prevent lateral disengagement of the first formation.
6. A brace as defined in claim 5, in which the first component comprises a laterally extending pin or spigot engageable in a corresponding hole formed in a part of the first trestle.
7. A brace as defined in claim 6, in which the second component comprises a claw which extends laterally across the first trestle part as the pin engages in the hole and which engages behind the trestle part to prevent withdrawal of the pin from the hole as the brace is rotated from the first to the second angle.
8. A brace as defined in any preceding claim, in which the movable latch comprises a first component laterally engageable with the second trestle, and a second component which is rotatable to engage behind a part of the second trestle so as to prevent lateral disengagement of the latch first component.
9. A brace as defined in claim 8, in which the latch first component comprises a lateral pin or spigot, engageable in a corresponding hole fonned in the second trestle.
10. A brace as defined in claim 9, in which the latch second component comprises a
rotatable claw.
11. A brace as defined in claim 10, in which the rotatable claw is held by gravity in engagement behind the second trestle part.
12. A system of trestles intercoimected by braces as defined in any preceding claim.
is
13. A system as defined in claim 12 in which at least one trestle includes integral braces for enhancing stability n a direction transverse to a working platform supported by the trestles.
12. A stabilising brace for fitment between builders' trestles, substantially as described with reference to or as shown in the drawings.
13. A system of trestles interconnected by braces as defined in any preceding claim.
14. A system as defined in claim 13 in which at least one trestle includes integral braces for enhancing stability in a direction transverse to a working platform supported by the trestles.
Amendments to the claims have been filed as follows 1. A stabilising brace for fitment between builders' trestles, at one end the brace comprising a fixed formation engageable with a first trestle at a first angle and rotatable to a second angle at which the fixed formation locks the brace to the first trestle, the brace comprising at its other end a movable latch for locking the brace to a second trestle, the fixed formation comprising a first component laterally engageable with the first trestle to provide a pivot point for the brace, and a second component which moves behind a frame of the first trestle as the brace is rotated from the first to the second angle, so as to prevent lateral disengagement of the first formation.
2. A brace as defined in claim I, in which the latch is captive on the brace.
3. A brace as defined in claim 1 or 2, in which the latch secures the brace at the second angle to the first trestle.
4. A brace as defined in any preceding claim, in which, in the locked position, the brace extends diagonally in a vertical plane between the first and second trestles.
5. A brace as defined in any preceding claim, in which the first component comprises a laterally extending pin or spigot engageable in a corresponding hole formed in a part of the first trestle.
6. A brace as defined in claim 5, in which the second component comprises a claw which extends laterally across the first trestle part as the pin engages in the hole and which engages behind the trestle part to prevent withdrawal of the pin from the hole as the brace is rotated from the first to the second angle.
7 A brace as defined in any preceding claii.ii. in which the movable latch comprises a first component laterally engageable with the second trestle, and a second component which is rotatable to engage behind a part of the second trestle so as to prevent lateral dmsengagern ent of the latch first component.
I
8. A brace as defined in claim 7, in which the latch first component comprises a lateral pin or spigot, engageable in a corresponding hole formed in the second trestle.
9. A brace as defined in claim 8, in which the latch second component comprises a
rotatable claw.
10. A brace as defined in claim 9, in which the rotatable claw is held by gravity in engagement behind the second trestle part.
Ii. A stabilising brace for fitment between builders' trestles, substantially as described with reference to or as shown in the drawings.
GB0428244A 2004-06-18 2004-12-23 Brace for builders' trestles Active GB2421538B (en)

Priority Applications (30)

Application Number Priority Date Filing Date Title
GB0428244A GB2421538B (en) 2004-12-23 2004-12-23 Brace for builders' trestles
DK06111486T DK1700973T3 (en) 2004-06-18 2005-04-28 Ladder support bracket
EP06111488A EP1700974A1 (en) 2004-06-18 2005-04-28 Bracket for kickboards
PCT/GB2005/001622 WO2005124057A1 (en) 2004-06-18 2005-04-28 Fittings for builders' trestles
DK06111479T DK1700972T3 (en) 2004-06-18 2005-04-28 Stabilizing struts for scaffolding bucks
ES05737864T ES2314651T3 (en) 2004-06-18 2005-04-28 CONSTRUCTION HORSE.
DE602005013482T DE602005013482D1 (en) 2004-06-18 2005-04-28 Support arm for ladder
PL05737864T PL1660738T3 (en) 2004-06-18 2005-04-28 Builders' trestle
PL06111486T PL1700973T3 (en) 2004-06-18 2005-04-28 Ladder support bracket
PT05737864T PT1660738E (en) 2004-06-18 2005-04-28 Builders` trestle
US11/630,174 US8794381B2 (en) 2004-06-18 2005-04-28 Fittings for builders' trestles
AT06111486T ATE426717T1 (en) 2004-06-18 2005-04-28 SUPPORT ARM FOR LADDER
PT06111486T PT1700973E (en) 2004-06-18 2005-04-28 Ladder support bracket
AU2005254758A AU2005254758A1 (en) 2004-06-18 2005-04-28 Fittings for builders' trestles
AT06111479T ATE407275T1 (en) 2004-06-18 2005-04-28 BRACES FOR BUCKETS
EP06111482A EP1696084A1 (en) 2004-06-18 2005-04-28 Telescopic rail for use in forming a guard or safety barrier for builders' trestles
ES06111486T ES2321132T3 (en) 2004-06-18 2005-04-28 LADDER SUPPORT MENSULA.
DK05737864T DK1660738T3 (en) 2004-06-18 2005-04-28 A builders' trestle
DE602005009465T DE602005009465D1 (en) 2004-06-18 2005-04-28 CONSTRUCTION SUPPORT BOCK
DE602005009482T DE602005009482D1 (en) 2004-06-18 2005-04-28 Bracing for bucks
CA002570528A CA2570528A1 (en) 2004-06-18 2005-04-28 Fittings for builders' trestles
AT05737864T ATE407274T1 (en) 2004-06-18 2005-04-28 CONSTRUCTION SUPPORT TRACKET
ES06111479T ES2314824T3 (en) 2004-06-18 2005-04-28 STABILIZATION STRAP FOR CONSTRUCTION HORSES.
PL06111479T PL1700972T3 (en) 2004-06-18 2005-04-28 Stabilising brace for builders' trestles
EP06111479A EP1700972B1 (en) 2004-06-18 2005-04-28 Stabilising brace for builders' trestles
EP06111486A EP1700973B1 (en) 2004-06-18 2005-04-28 Ladder support bracket
EP06111490A EP1698744A1 (en) 2004-06-18 2005-04-28 A builders' trestles
PT06111479T PT1700972E (en) 2004-06-18 2005-04-28 Stabilising brace for builders` trestles
EP05737864A EP1660738B1 (en) 2004-06-18 2005-04-28 Builders' trestle
IE20050866A IE20050866A1 (en) 2004-12-23 2005-12-22 Brace for builder's trestles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0428244A GB2421538B (en) 2004-12-23 2004-12-23 Brace for builders' trestles

Publications (3)

Publication Number Publication Date
GB0428244D0 GB0428244D0 (en) 2005-01-26
GB2421538A true GB2421538A (en) 2006-06-28
GB2421538B GB2421538B (en) 2006-11-22

Family

ID=34113177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0428244A Active GB2421538B (en) 2004-06-18 2004-12-23 Brace for builders' trestles

Country Status (2)

Country Link
GB (1) GB2421538B (en)
IE (1) IE20050866A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB961392A (en) * 1962-01-12 1964-06-24 G K N Lysaght Pty Ltd Brace and handrail lock
DE1230190B (en) * 1959-04-25 1966-12-08 Emil Mauritz Huennebeck Dipl I Framework
DE3504188A1 (en) * 1985-02-07 1986-08-07 Sebastian 8388 Mamming Ernst Diagonal strut for scaffoldings
DE20005629U1 (en) * 2000-03-25 2000-06-29 Krause-Werk GmbH & Co KG, 36304 Alsfeld strut
EP1094175A1 (en) * 1999-10-18 2001-04-25 Société Anonyme dite Tubesca Fastening device of diagonal bars on scaffolding ladders and scaffolding obtained

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230190B (en) * 1959-04-25 1966-12-08 Emil Mauritz Huennebeck Dipl I Framework
GB961392A (en) * 1962-01-12 1964-06-24 G K N Lysaght Pty Ltd Brace and handrail lock
DE3504188A1 (en) * 1985-02-07 1986-08-07 Sebastian 8388 Mamming Ernst Diagonal strut for scaffoldings
EP1094175A1 (en) * 1999-10-18 2001-04-25 Société Anonyme dite Tubesca Fastening device of diagonal bars on scaffolding ladders and scaffolding obtained
DE20005629U1 (en) * 2000-03-25 2000-06-29 Krause-Werk GmbH & Co KG, 36304 Alsfeld strut

Also Published As

Publication number Publication date
GB0428244D0 (en) 2005-01-26
IE20050866A1 (en) 2006-07-12
GB2421538B (en) 2006-11-22

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