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WO2008071246A1 - Flexible trap door for access platforms - Google Patents

Flexible trap door for access platforms Download PDF

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Publication number
WO2008071246A1
WO2008071246A1 PCT/EP2007/008355 EP2007008355W WO2008071246A1 WO 2008071246 A1 WO2008071246 A1 WO 2008071246A1 EP 2007008355 W EP2007008355 W EP 2007008355W WO 2008071246 A1 WO2008071246 A1 WO 2008071246A1
Authority
WO
WIPO (PCT)
Prior art keywords
trap door
closing
caused
flexible trap
flexible
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
PCT/EP2007/008355
Other languages
French (fr)
Inventor
Ricardo Rodriguez Fernandez
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE602007006992T priority Critical patent/DE602007006992D1/en
Priority to US12/446,855 priority patent/US20100032240A1/en
Priority to AT07818439T priority patent/ATE470032T1/en
Priority to EP07818439A priority patent/EP2102431B1/en
Priority to CN200780039404XA priority patent/CN101558211B/en
Publication of WO2008071246A1 publication Critical patent/WO2008071246A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • 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
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G2001/155—Platforms with an access hatch for getting through from one level to another

Definitions

  • the object of the present invention refers to a flexible trap door for access platforms.
  • the EN-12810-1 2003 scaffolding Standard considers two ways to pass from one level to another:
  • the EN 12811-1 Standard in point 5.8.3, specifies: "The free dimensions of the access opening on a platform shall be at least 0.45m in width, measured transversally across the platform and
  • the load stipulated by the EN 12811-1 2003 Standard corresponds to class 3, that is to say, 2.0 KN/m 2 .
  • the present invention refers to a flexible trap door fastened to an access platform, that, when pushed by the worker's helmet, opens by rolling up and stays open while passing through the hole. Closing is "automatically” and progressively caused once the worker has gone through. Once closed, it may be used as a work surface, since it is strengthened by a cross-directional rigid reinforcement, allowing it to support the working load.
  • This flexible trap may be used for access platforms in general and more preferably for scaffolding access platforms.
  • the trap door consists of a flexible, lengthwise rubber plate, cross- directionally reinforced inside, which enables it to open and support the working load of 2.0 KN/m 2 stipulated by the EN 12811-1 2003 Standard.
  • the materials that may be used are very varied, but have to fulfil the following requirements:
  • the quantity may be continuously cast or laminated, both in one direction as the other.
  • the continuous lamination must be with heat in the remoulding process, so that the crosswise reinforcement sticks to the rubber.
  • Figure 1 Trap door opening lengthwise along the platform.
  • Figure 2 Trap door opening crosswise across the platform.
  • FIG. 3 Flexible trap door: rubber body (1 ), access platform (2), rigid cross-directional reinforcement (3), tape (4) and lock (5).
  • Figure 4 Upwards sequence from one level to another.
  • Figure 5 Downwards sequence from one level to another.
  • Figure 6 Cross-directional reinforcement.
  • Figure 7 Initial section of the flexible trap door according to an embodiment method.
  • Figure 8 End section of the flexible trap door according to an embodiment method.
  • Figure 9 Arrangement of the flexible trap door according to an embodiment method.
  • the flexible trap door is fastened to the access platform
  • Figure 6 shows a possible cross-directional reinforcement, which would be made up of round aluminium pipes with an inner diameter (D) of 5 mm, 1.5 mm (E 1) thick and 1.5x2 mm (E2xE3) flaps.
  • Figure 7 shows an example of configuration that would be made up of a silicon rubber body (1 ) with an inner polyester (6) mesh, 14 mm (E4) thick, with recesses of variable thickness (7) and transversely strengthened by the reinforcement (3), separated by a length (L) of 30 mm.
  • Figure 8 shows the end section of the trap door, finishing off in drillholes (8) to fasten it to the access platform with a diameter of 12 mm and a reinforcing flat bar (9).
  • Figure 9 shows the arrangement of elements on a 650mm-long (H), 550m-wide (A) trap door, displaying the typical profile of an access platform (2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Tea And Coffee (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

Self-closing, flexible trap door for access platforms, enabling its use as a work surface, consisting of a rubber body (1), fixed to the access platform (2), strengthened by a cross-directional rigid reinforcement (3), fitted with a tape (4) to facilitate opening and a lock (5) when being transported and assembled. Closing is caused by the pressure of the rubber. Additionally, the closing is caused by an externally-driven mechanism or by means of magnets.

Description

FLEXIBLE TRAP DOOR FOR ACCESS PLATFORMS
D E S C R I P T I O N
OBJECT OF THE INVENTION
The object of the present invention refers to a flexible trap door for access platforms.
BACKGROUND OF THE INVENTION
One of the most important topics in present-day is to guarantee the safety of workers. All social partners are making efforts to reduce the number of accidents, above all in construction, a sector where negative records are beaten.
With this in mind, improving scaffolding safety directly helps to reduce the accident rate, since 70% of accidents are caused by falls from different levels.
The EN-12810-1 2003 scaffolding Standard considers two ways to pass from one level to another:
- by means of a stepladder through an access platform
- by means of an access stairway
The EN 12811-1 Standard, in point 5.8.3, specifies: "The free dimensions of the access opening on a platform shall be at least 0.45m in width, measured transversally across the platform and
0.60m in length. If it were not possible to close the opening by means of a permanently attached trap door, a protective guardrail must be able to be fitted. The trap door shall be lockable in the closed position".
Two types of trap doors may be found on the market:
a) opening lengthwise along the platform (figure 1 ) b) opening crosswise across the platform (figure 2)
In both cases, opening is manual and requires the use of at least one hand while going up, thus reducing safety on going up the stepladder.
Closing deserves separate treatment:
In case (a), a foreshortening is needed, since, while going down in one direction, in the other, with the arm over the head, the door must be held open. Moreover, and depending on the length of the platform, the door hampers the following section of the ladder.
In case (b), the opening position does not allow more than 90°, for which reason closing is caused by "gravity", which leads to accidents on being a rigid, heavy element.
Workers on scaffolding normally carry tools in their hands, and if it is necessary to go up a ladder of 40m or more, opening and closing doors, some to go upwards and others downwards, they are considered to be always open. In case (a), they are simply not closed, which makes the situation worse, on the lower folding face of the trap door resting on the upper part, which is the part trodden on.
In case (b), they either keep it forced open so it does not close, causing broken hinges, or keep it fastened open with wires. Case (a) is curiously the most usual.
In both cases, the trap doors are normally made of two materials:
Plywood Aluminium plate
The load stipulated by the EN 12811-1 2003 Standard (point 6.2.4) corresponds to class 3, that is to say, 2.0 KN/m 2.
DESCRIPTION OF THE INVENTION
The present invention refers to a flexible trap door fastened to an access platform, that, when pushed by the worker's helmet, opens by rolling up and stays open while passing through the hole. Closing is "automatically" and progressively caused once the worker has gone through. Once closed, it may be used as a work surface, since it is strengthened by a cross-directional rigid reinforcement, allowing it to support the working load.
To open it from above, it has a tape to half-open it and place a foot on the first step of the ladder, opening it while going down. When not in use, it has a lock to avoid its opening while being transported and assembled. This flexible trap may be used for access platforms in general and more preferably for scaffolding access platforms.
The trap door consists of a flexible, lengthwise rubber plate, cross- directionally reinforced inside, which enables it to open and support the working load of 2.0 KN/m 2 stipulated by the EN 12811-1 2003 Standard. The materials that may be used are very varied, but have to fulfil the following requirements:
Rubber
- Resistance to environmental agents (UVA rays, temperature, humidity...) since scaffolding is generally used outdoors.
- Non-slip upper surface, since it is to be used as a work surface and walkway.
- Variable flexibility, more flexible at the front and less nearer its fastening point to the access platform, in order to facilitate its opening and guarantee self-closing.
- It shall resist chemical agents and show a certain fire-resistance (flameproof) especially where the scaffolding is to be used in industry.
- 15 mm maximum thickness.
Reinforcement
- They are profiles separated by a maximum of 4 cm.
- They have to be as light as possible to facilitate opening and not lead to an excessive weight being added to the access platform unit.
- It shall resist the working load of 2.0 KN/m 2, with a maximum flexion of 12mm to guarantee the feeling of safety while being trodden on. Possible rubbers:
- Natural rubber with or without additives
- lsoprene - Neoprene
- Polybutadiene
- Butyl rubber
- Acrylic rubber
- Polyethylene rubber - Silicon
- Polysulphur
- Vinyl ethylene-acetate
- Fluorade ... etc. and its possible combinations
Possible reinforcements:
- Carbon fibre
- Glass fibre - Aluminium
- Copper
- Brass
- Steel - Wood - Combinations of different profiles and / or inter-connected, forming a mesh or chain.
The shape of these profiles could be:
- in round, square or rectangular pipe-shape - in T - in I
- in triangle, etc.
Manufacturing process:
Depending on the quantity, it may be continuously cast or laminated, both in one direction as the other. The continuous lamination must be with heat in the remoulding process, so that the crosswise reinforcement sticks to the rubber.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 : Trap door opening lengthwise along the platform.
Figure 2: Trap door opening crosswise across the platform.
Figure 3: Flexible trap door: rubber body (1 ), access platform (2), rigid cross-directional reinforcement (3), tape (4) and lock (5).
Figure 4: Upwards sequence from one level to another.
Figure 5: Downwards sequence from one level to another.
Figure 6: Cross-directional reinforcement.
Figure 7: Initial section of the flexible trap door according to an embodiment method.
Figure 8: End section of the flexible trap door according to an embodiment method.
Figure 9: Arrangement of the flexible trap door according to an embodiment method.
DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
In a preferred embodiment of the invention, in the same way as shown in figure 3, the flexible trap door is fastened to the access platform
(2) that opens by rolling up when pushed by the worker's helmet and stays open while they pass through the hole. Closing "automatically" and progressively takes place once the worker has gone through. Once closed, it may be used as a work surface, since it is strengthened by a cross- directional rigid reinforcement (3), allowing it to support the working load.
To open it from above, it has a tape (4) to half-open it and place a foot on the first step of the ladder, opening it while going down.
When not in use, it has a lock (5) to avoid its opening while being transported and assembled.
Figure 6 shows a possible cross-directional reinforcement, which would be made up of round aluminium pipes with an inner diameter (D) of 5 mm, 1.5 mm (E 1) thick and 1.5x2 mm (E2xE3) flaps.
Figure 7 shows an example of configuration that would be made up of a silicon rubber body (1 ) with an inner polyester (6) mesh, 14 mm (E4) thick, with recesses of variable thickness (7) and transversely strengthened by the reinforcement (3), separated by a length (L) of 30 mm.
Figure 8 shows the end section of the trap door, finishing off in drillholes (8) to fasten it to the access platform with a diameter of 12 mm and a reinforcing flat bar (9).
Figure 9 shows the arrangement of elements on a 650mm-long (H), 550m-wide (A) trap door, displaying the typical profile of an access platform (2).

Claims

1. Self-closing, flexible trap door for scaffolding access platform that may be used as a work surface, consisting of a rubber body fastened to the access platform, strengthened by a cross-directional rigid reinforcement, fitted with a tape to facilitate its opening and a lock while being transported and assembled, the closing of which is caused by the pressure of the rubber.
2. Flexible trap door according to claim 1 , characterized by closing being caused by an externally-driven mechanism.
3. Flexible trap door according to claim 1 , characterized by closing being caused by magnetic attraction.
PCT/EP2007/008355 2006-12-11 2007-09-26 Flexible trap door for access platforms Ceased WO2008071246A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE602007006992T DE602007006992D1 (en) 2006-12-11 2007-09-26 FLEXIBLE LUKE FOR ACCESS TO PLATFORMS
US12/446,855 US20100032240A1 (en) 2006-12-11 2007-09-26 Flexible trap door
AT07818439T ATE470032T1 (en) 2006-12-11 2007-09-26 FLEXIBLE HATCH FOR ACCESS TO PLATFORMS
EP07818439A EP2102431B1 (en) 2006-12-11 2007-09-26 Flexible trap door for access platforms
CN200780039404XA CN101558211B (en) 2006-12-11 2007-09-26 Flexible flaps for access platforms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200603128 2006-12-11
ES200603128A ES2277793B1 (en) 2006-12-11 2006-12-11 FLEXIBLE TRAMPET FOR ANDAMIOS ACCESS PLATFORM.

Publications (1)

Publication Number Publication Date
WO2008071246A1 true WO2008071246A1 (en) 2008-06-19

Family

ID=38330868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/008355 Ceased WO2008071246A1 (en) 2006-12-11 2007-09-26 Flexible trap door for access platforms

Country Status (7)

Country Link
US (1) US20100032240A1 (en)
EP (1) EP2102431B1 (en)
CN (1) CN101558211B (en)
AT (1) ATE470032T1 (en)
DE (1) DE602007006992D1 (en)
ES (1) ES2277793B1 (en)
WO (1) WO2008071246A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
GB2472844A (en) * 2009-08-21 2011-02-23 Promote Products Ltd Scaffold board
EP2864564A4 (en) * 2012-06-26 2015-12-23 Form 700 Pty Ltd Improved frame for climbing screen

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US9133629B2 (en) * 2010-08-11 2015-09-15 Tim Copeland Vertical enclosure safety apparatus
US20180217855A1 (en) * 2011-01-14 2018-08-02 Google Inc. Estimating wait times for requests
DE102013218580A1 (en) 2012-09-17 2014-03-20 Peri Gmbh Floor covering for a scaffolding
US9409755B2 (en) * 2013-08-02 2016-08-09 Sam Carbis Asset Management, Llc Platform safety enclosure
CA2963261C (en) 2016-04-05 2020-07-28 Access Industrial Inc. Safety landing
AU2017202444B2 (en) * 2016-12-19 2019-06-20 Voideck Ipco Limited A void platform and a method for providing a platform support across a building void
JP7063158B2 (en) * 2018-07-11 2022-05-09 住友金属鉱山株式会社 Maintenance sheet
AU2020203296B2 (en) * 2019-05-22 2025-11-27 Voideck Ipco Limited Improvements relating to void platforms
US12163373B2 (en) 2021-05-19 2024-12-10 Gregory R. Meizinger Access door assembly and related methods

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JPH04336161A (en) * 1991-05-14 1992-11-24 Ohbayashi Corp Framework scaffold
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GB2472844A (en) * 2009-08-21 2011-02-23 Promote Products Ltd Scaffold board
EP2864564A4 (en) * 2012-06-26 2015-12-23 Form 700 Pty Ltd Improved frame for climbing screen

Also Published As

Publication number Publication date
US20100032240A1 (en) 2010-02-11
DE602007006992D1 (en) 2010-07-15
ES2277793A1 (en) 2007-07-16
ES2277793B1 (en) 2008-03-01
ATE470032T1 (en) 2010-06-15
EP2102431A1 (en) 2009-09-23
CN101558211B (en) 2011-06-15
EP2102431B1 (en) 2010-06-02
CN101558211A (en) 2009-10-14

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