WO2006086989A1 - Safety lock for scaffolding - Google Patents

Safety lock for scaffolding Download PDF

Info

Publication number
WO2006086989A1
WO2006086989A1 PCT/DK2006/000092 DK2006000092W WO2006086989A1 WO 2006086989 A1 WO2006086989 A1 WO 2006086989A1 DK 2006000092 W DK2006000092 W DK 2006000092W WO 2006086989 A1 WO2006086989 A1 WO 2006086989A1
Authority
WO
WIPO (PCT)
Prior art keywords
safety lock
scaffolding
locking pin
head part
connecting member
Prior art date
Application number
PCT/DK2006/000092
Other languages
French (fr)
Inventor
Birger Adsbøl KNUDSEN
Original Assignee
Jumbo Stillads A/S
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 Jumbo Stillads A/S filed Critical Jumbo Stillads A/S
Publication of WO2006086989A1 publication Critical patent/WO2006086989A1/en

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
    • E04G1/154—Non-detachably fixed and secured connections between platform and scaffold

Definitions

  • Scaffolding is used when erecting or renovating a house when the workmen are to work at levels above ground level. This is a safety precaution, and most countries have standards and regulations requiring use of scaffolding, and institutions like e.g. the Working Environment Authority supervises the workmens' use of scaffolding.
  • the most well-known safety lock includes a hook member for connecting the platform with the ribbing and a displaceable locking pin.
  • the hook member is connected with the rail section on the platform and extends outwards, whereby it is possible to arrange a platform between two side frames, as the hook member surrounds a part of the metal pipe constituting the ribbing.
  • the displaceable locking pin is arranged in a hole in the rail section, and is a bent section designed with flat end parts whereby it is possible to remove the locking pin from the hole in the rail section.
  • the safety lock is not structurally simple and not easy to assemble.
  • the locking pin When not in use, the locking pin is a loose unit which may move freely back and forth in the hole in the rail section, which can be a disadvantage when the scaffolding is to be assembled, as the locking pin is to be in the release position in order to allow for mounting the platform on the ribbing, and furthermore unwanted noise is produced when the platforms are transported.
  • the function of the compressible element is to allow displacement of the locking pin, either for forcing the locking pin up against the metal piping of the ribbing when the locking pin is in a locked position, or for forcing the locking pin up against the underside of the rail section when the locking pin is in a released position.
  • the compressible element is a spring arranged between the head part and the locking pin, whereby displacement of the locking pin is allowed, which makes is very easy to operate the safety lock.
  • the compressible element is of an elastic plastic material which is arranged between the head part and the locking pin.
  • the compressible element surrounds the connecting member.
  • the hole has a diameter which is greater than the diameter of the connecting member. It will thus be possible to tilt the connecting member slightly in the hole, and the edge part will, due to the compressible element and the shape of the locking pin, be pressed against the sidewall part of the rail section when the locking pin is arranged in the right position under the metal piping of the ribbing.

Abstract

The present invention concerns a safety lock (1) for scaffolding, including fastening means adapted for connecting the safety lock (1) with a rail section (2) on a platform (16) on the scaffolding, and locking means (3) for securing the safety lock (1) to a ribbing (4) on a side frame of the scaffolding, where the locking means (3) include a displaceable locking pin (5) and a hook member (6) for connecting the platform (16) to the ribbing (4), where the locking means (3) furthermore includes a head part (7), a connecting member (8) and at least one compressible element (9) which is arranged between the head part (7) and the locking pin (5).

Description

Safety Lock for Scaffolding
Field of the Invention
The present invention concerns a safety lock for scaffolding, including fastening means adapted for connecting the safety lock with a rail section on a platform on the scaffolding, and locking means for securing the safety lock to a ribbing on a side frame of the scaffolding, where the locking means include a displaceable locking pin and a hook member for connecting the platform to the ribbing.
Background of the Invention
Scaffolding is used when erecting or renovating a house when the workmen are to work at levels above ground level. This is a safety precaution, and most countries have standards and regulations requiring use of scaffolding, and institutions like e.g. the Working Environment Authority supervises the workmens' use of scaffolding.
As scaffolding is not a stationary structure and has to be removed when the erecting or renovation work is finished, the current scaffoldings include a number of platforms on which the workmen may walk, a number of side frames with ribs between which the platforms are arranged, and a number of rails and ladders.
The platforms are typically wooden boards or metal plates with reinforcing and surrounding rail sections. The side frame with ribbing and rails are typically made of metal piping which is either welded together or bolted together.
hi stormy weather there is a risk that the wind destroys the scaffolding if the individual parts of the scaffolding are not securely interconnected, hi particular the platforms are exposed to the risk of being blown off the side frames. A need for a safety lock ensuring that the platforms are securely connected to the side frames therefore arises.
The most well-known safety lock includes a hook member for connecting the platform with the ribbing and a displaceable locking pin. The hook member is connected with the rail section on the platform and extends outwards, whereby it is possible to arrange a platform between two side frames, as the hook member surrounds a part of the metal pipe constituting the ribbing.
The displaceable locking pin is arranged in a hole in the rail section, and is a bent section designed with flat end parts whereby it is possible to remove the locking pin from the hole in the rail section.
The drawbacks of this type of safety lock are:
- The safety lock is not structurally simple and not easy to assemble.
- It is necessary to use a hammer or similar for displacing the locking pin between a locking position and a release position.
- When not in use, the locking pin is a loose unit which may move freely back and forth in the hole in the rail section, which can be a disadvantage when the scaffolding is to be assembled, as the locking pin is to be in the release position in order to allow for mounting the platform on the ribbing, and furthermore unwanted noise is produced when the platforms are transported.
Object of the Invention It is the object of the present invention to provide a safety lock which is structurally simple, easy to make, easy to operate, safe in use and which allows the platforms to be stacked readily and nicely.
This is achieved with a safety lock as specified in the preamble of claim 1, and where the locking means furthermore includes a head part, a connecting member and at least one compressible element which is arranged between the head part and the locking pin.
Description of the Invention
The safety lock according to the present invention comprises fastening means arranged for connecting the safety lock with a rail section on a platform on the scaffolding, and locking means for securing the safety lock to a ribbing on a side frame of the scaffolding. The locking means includes a displaceable locking pin and a hook member for connecting the platform to the ribbing, where the hook member is arranged from above and thereby encircles part of the ribbing, and the locking pin is arranged from underneath, whereby the safety lock is secured to the ribbing in a safe way.
Furthermore, the locking means includes a head part, a connecting member and at least one compressible element which is arranged between the head part and the locking pin. The head part functions as an upper stop or a fastening point for the compressible element.
The function of the compressible element is to allow displacement of the locking pin, either for forcing the locking pin up against the metal piping of the ribbing when the locking pin is in a locked position, or for forcing the locking pin up against the underside of the rail section when the locking pin is in a released position.
Because the locking pins has a relatively slender profile, it is possible to position the locking pin so as to enable the platform to be stacked easily and nicely, e.g. by transport.
In order to ensure that the platforms do not slide, e.g. during transport, the platforms are provided with corresponding projections and recesses, where the projection, for example, is situated at the top side of the platforms, and the recess is situated at the underside of the platforms.
By stacking it is thus possible that the projection on a platform will engage the recess on another platform, thus preventing lateral movement of the platforms. In order to make room for the locking pins, the height of the projections is greater than the thickness of the locking pins and the depth of the recesses.
In a preferred embodiment of the present invention, the compressible element is a spring arranged between the head part and the locking pin, whereby displacement of the locking pin is allowed, which makes is very easy to operate the safety lock. Alternatively, the compressible element is of an elastic plastic material which is arranged between the head part and the locking pin.
In a preferred embodiment of the present invention, the compressible element surrounds the connecting member. The advantages of this are that the locking pin can be displaced and rotated, and the connecting member will furthermore always hold the compressible element in correct position.
As a further safety, the head part has at least one edge part which is arranged to be positioned against a sidewall part of the rail section, whereby inadvertent rotation of the locking pin causing failure of the safety lock is prevented.
In order to ensure that the safety lock is connected with the rail section of the platform, the fastening means include a hole in the rail section through which the connecting member is arranged. Since the connecting member is arranged between the head part and the locking pin, it is impossible to remove the locking means by accident when both the head part and the locking means are fastened to the connecting member which is arranged through the hole in the rail section.
In order to ensure that the edge part on the head part may be positioned against the sidewall part of the rail section, the hole has a diameter which is greater than the diameter of the connecting member. It will thus be possible to tilt the connecting member slightly in the hole, and the edge part will, due to the compressible element and the shape of the locking pin, be pressed against the sidewall part of the rail section when the locking pin is arranged in the right position under the metal piping of the ribbing.
The hole may have any circular or polygonal shape, and the connecting member may have any circular or polygonal cross-section, but typically the hole and the cross- section will have the same shape.
In an embodiment of the present invention, the connecting member and the head part are constituted by a bolt with or without screw thread, whereby the safety lock is made structurally simple and easy to make and assemble, since the bolt with or without screw thread is typically made with a hexagonal head part. The only required assembling is thus the mounting of the connecting member through the hole in the rail section and the connection to the locking pin.
It is to be mentioned, that the safety lock according to the present invention in the above is applied to scaffolding, but may be used in everywhere else where a platform is to be mounted securely on side frames with at least one ribbing.
Description of the drawing. The present invention will now be described in detail with reference to the accompanying drawing in which:
Fig. 1 shows a safety lock according to the present invention; Fig. 2 shows locking means on the safety lock; Fig. 3 shows a head part against a sidewall; and
Fig. 4 shows a projection and a recess on a platform.
Detailed Description of the Invention
Fig. 1 shows a safety lock 1 according to the present invention, the lock 1 including fastening means adapted for connecting the safety lock 1 to a rail section 2 on a platform (not shown), and locking means 3 for securing the safety lock 1 to a ribbing 4 on a side frame (not shown). The locking means 3 includes a displaceable locking pin 5, and a hook member 6 and the locking pin 5 are shown in a locking position where the hook member 6 is partly surrounding the ribbing 4 from above, and the locking pin 5 is arranged on the ribbing 4 from below. The locking means 3 furthermore includes a head part 7, a connecting member 8 and a spring 9 which is arranged through the head part 7 and the locking pin 5. The connecting member 8 is arranged through the hole 17 in the rail section 10. The hole 17 is greater than the diameter of the connecting member 8, allowing the connecting member 8 to tilt in the hole 17 when the spring 9 is compressed. The spring 9 may be compressed by acting on the head part 7 with a finger or with a suitable tool. When the spring 9 is compressed, the connecting member 8 may be tilted in the hole 17, whereby it is possible to turn the locking means 3 from a locking position to an open position. When a scaffolding platform is to be mounted or dismounted, the open position is used, and when the scaffolding is to be secured, the locking means 3 are turned to the position shown in Fig. 1, where the locking means 3 are secured against inadvertent opening. The locking pin 5 is secured in the locking position due to the forces coming from the spring 9 which is arranged between the head part 7 and the rail section 10.
Fig. 2 shows the locking means 3 on the safety lock (not shown) where it is possible to see that the head part 7 is shaped hexagonally with six edge parts 11. The spring 9 surrounds the connecting member 8 and is arranged between the head part 7 and the locking pin 5 which is designed with upwards angled end parts 12, providing that the locking pin 5 partly encloses the ribbing (not shown), thereby having a better grip on the ribbing (not shown) when the locking pin 5 is in the locking position.
Fig. 3 shows a head part 7 against a sidewall 13 in the rail section (not shown) where it is possible to see that the head part 7 is pressed against the sidewall or in proximity thereof. It is not possible to rotate the head part 7, whereby the locking pin (not shown) is secured in the correct position. The locking means 3 may only be moved from this position by compressing the spring 9 and simultaneously tilting the connecting member 8, whereby the distance between the sidewall 13 and the head part 7 are increased and rotation of the locking pin 5/locking means 3 is enabled.
Fig. 4 shows a projection 14 and a recess 15 on a platform 16, where the projection 14 is at the top side of the platform 16, and the recess 15 is at the underside of the platform 16. During stacking, the projection 14 will thus engage the recess (not shown) on another platform (not shown), whereby any lateral movement is prevented. The height of the projection 14 is greater than the thickness of the locking pin (not shown) and the depth of the recess 15.

Claims

1. A safety lock (1) for scaffolding, including fastening means arranged for connecting the safety lock (1) with a rail section (2) of a platform (16) on the scaffolding, and locking means (3) for securing the safety lock (1) to a ribbing (4) on a side frame of the scaffolding, where the locking means (3) include a displaceable locking pin (5) and a hook member (6) for connecting the platform (16) to the ribbing (4), characterised in that the locking means (3) furthermore includes a head part (7) with at least one edge part (11), a connecting member (8) and at least one compressible element (9) which is arranged between the head part (7) and the locking pin (5).
2. Safety lock (1) according to claim 1, characterised in that the compressible element (9) is a spring.
3. Safety lock (1) according to any of claims 1 - 2, characterised in that the compressible element (9) surrounds the connecting member (8).
4. Safety lock (1) according to any of claims 1 -3, characterised in that the fastening means include a hole (17) in the rail section (10), through which the connecting member (8) is arranged.
5. Safety lock (1) according to claim 4, characterised in that the hole (17) has a diameter which is greater than the diameter of the connecting member (8).
6. Safety lock (1) according to any of claims 4 -5, characterised in that the connecting member (8) and the head part (7) are constituted by a bolt with or without a screw thread.
PCT/DK2006/000092 2005-02-16 2006-02-16 Safety lock for scaffolding WO2006086989A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200500231 2005-02-16
DKPA200500231 2005-02-16

Publications (1)

Publication Number Publication Date
WO2006086989A1 true WO2006086989A1 (en) 2006-08-24

Family

ID=36228557

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2006/000092 WO2006086989A1 (en) 2005-02-16 2006-02-16 Safety lock for scaffolding

Country Status (1)

Country Link
WO (1) WO2006086989A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2101014A2 (en) * 2008-03-10 2009-09-16 PF MANAGEMENT Holding ApS Scaffolding board
WO2009115067A1 (en) * 2008-03-19 2009-09-24 Wilhelm Layher Verwaltungs Gmbh Coating unit having lift-off protection and method for securing a coating unit against lift-off and method for releasing a coating unit secured against lift-off
EP2189592A1 (en) * 2008-11-21 2010-05-26 Haki AB Locking device for modular scaffolding or similar
WO2019014009A1 (en) * 2017-07-12 2019-01-17 Curtis Johnny Improved latchable scaffold planks

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637638A1 (en) * 1988-10-06 1990-04-13 Pozo Jean Scaffolding comprising fixing means affording it rigidity, safety and speed of use
JPH10266556A (en) * 1997-03-25 1998-10-06 Chuo Build Ind Co Ltd Scaffolding board
JP2002004572A (en) * 2000-06-27 2002-01-09 Ojima Seisakusho:Kk Gap blocking structure for scaffolding board
JP2004278085A (en) * 2003-03-14 2004-10-07 Gop Kk Portable working platform

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637638A1 (en) * 1988-10-06 1990-04-13 Pozo Jean Scaffolding comprising fixing means affording it rigidity, safety and speed of use
JPH10266556A (en) * 1997-03-25 1998-10-06 Chuo Build Ind Co Ltd Scaffolding board
JP2002004572A (en) * 2000-06-27 2002-01-09 Ojima Seisakusho:Kk Gap blocking structure for scaffolding board
JP2004278085A (en) * 2003-03-14 2004-10-07 Gop Kk Portable working platform

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) *
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 05 3 May 2002 (2002-05-03) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2101014A2 (en) * 2008-03-10 2009-09-16 PF MANAGEMENT Holding ApS Scaffolding board
EP2101014A3 (en) * 2008-03-10 2014-01-22 Pf Group A/S Scaffolding board
WO2009115067A1 (en) * 2008-03-19 2009-09-24 Wilhelm Layher Verwaltungs Gmbh Coating unit having lift-off protection and method for securing a coating unit against lift-off and method for releasing a coating unit secured against lift-off
AU2008353071B2 (en) * 2008-03-19 2012-02-02 Wilhelm Layher Verwaltungs Gmbh Coating unit having lift-off protection and method for securing a coating unit against lift-off and method for releasing a coating unit secured against lift-off
EP2479360A1 (en) 2008-03-19 2012-07-25 Wilhelm Layher Verwaltungs-GmbH Lining unit with lifting guard and method for preventing a lining unit from being lifted and method for unlocking a lining unit secured against lifting
AU2008353071C1 (en) * 2008-03-19 2012-08-30 Wilhelm Layher Verwaltungs Gmbh Coating unit having lift-off protection and method for securing a coating unit against lift-off and method for releasing a coating unit secured against lift-off
EP2189592A1 (en) * 2008-11-21 2010-05-26 Haki AB Locking device for modular scaffolding or similar
WO2019014009A1 (en) * 2017-07-12 2019-01-17 Curtis Johnny Improved latchable scaffold planks

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