DK3036383T3 - SAFETY DEVICE - Google Patents
SAFETY DEVICE Download PDFInfo
- Publication number
- DK3036383T3 DK3036383T3 DK14755907.4T DK14755907T DK3036383T3 DK 3036383 T3 DK3036383 T3 DK 3036383T3 DK 14755907 T DK14755907 T DK 14755907T DK 3036383 T3 DK3036383 T3 DK 3036383T3
- Authority
- DK
- Denmark
- Prior art keywords
- holder
- protective cap
- socket
- sleeve
- cap according
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/161—Protective caps for the ends of reinforcing bars
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Reinforcement Elements For Buildings (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Description
DESCRIPTION
Field of the Invention [0001] The invention relates to a device and a method for use thereof for reducing the likelihood of impalement injury, especially such injuries caused by contact with reinforcing bars of the type used in the building industry for reinforcing concrete.
Background and Prior Art [0002] During the construction of buildings and other structures that use steel reinforcing bars (also referred to as rebars or rebar), there is often a period of time during construction when the end of the rebars extend out of the structure temporarily, e.g. pending construction of an abutting portion of the structure whose own reinforcing bars need to be connected to the existing rebars. The rebars are typically of approximately circular cross-section having a diameter most commonly between 10-40mm, depending on the reinforcing requirement.
[0003] The rebars are usually made of steel, and often have a coating of rust on them, from exposure to the element. This renders them quite difficult to see. They often also have sharp edges. Building sites are also busy workplaces, with many distractions, and there is a real risk that on-site workers might e.g. trip and impale themselves on the exposed ends of the rebars, or might simply walk into the end of the rebars, causing less serious but equally unacceptable injuries. In the most extreme cases, a fall from height onto an exposed end of a rebar poses a very serious risk to life.
[0004] As a result, protective devices have begun to be used that offer a level of risk reduction in respect of such injuries. One such known device comprises a circular cap, illustrated in cross-section in Figure 1, and generally indicated by 1. The cap 1 has a generally flat top 2 and a aperture 3 in the underside. It is often referred to as being "mushroom-shaped". The cap is placed over the end of each exposed rebar where it is held in position by friction between the rebar and the interior surface of the aperture 3. There are a number of problems with such an arrangement: A cap needs to be provided for every exposed rebar on the site, and this requires a large number of caps to be made available, and considerable time spent affixing a cap to each rebar. Also, it is relatively easy for the caps to be accidentally dislodged from the ends of the rebar, thereby reintroducing the risk to the workplace. This is especially the case where the caps are repeatedly reused and become worn, thereby reducing the friction between the caps and the ends of the rebar.
[0005] An alternative design has also been introduced, sold (primarily in Canada) under the trade name "Carnie Cap", and illustrated in cross-section Figure 2, generally indicated by 4. In this design, a tubular aperture 3 is also provided on the underside of the device, that allows the cap 4 to be slipped over then end of a rebar. On the top of the cap are provided two resiliently deformable flaps 5 that define a mouth 6. The flaps 5 may be deformed in the direction of the arrows as illustrated, to allow a length of timber to be laid in the mouth 6, and extend to an adjacent such cap 4, or caps. The timber is then held in position in the caps by the use of screws, inserted through holes 7 in each of the flaps 5. Whilst this is an improvement on the individual caps illustrated in Figure 1, the devices are quite time-consuming to fix to the exposed rebars, and require screwing to the timber length in order to protect an array of rebars. If the timber is not screwed in place, then there is a high chance that the timber might be "borrowed" for alternative use on the site. Additionally, the whole cap and timber assembly can be accidentally knocked off the end of the rebars, again reintroducing the impalement risk to the workplace.
[0006] US 6,073,415 discloses a protective cap according to the preamble of claim 1. It is amongst the objects of the present invention to attempt a solution to this and other problems.
Summary of the Invention [0007] Accordingly, the invention provides a protective cap according to claim 1, for preventing impalement injury on rebar, comprising: a tubular socket to receive an end of a length of rebar; said socket being attached to a sleeve defining a channel to receive and enclose a length of timber; and wherein the axes of said socket and said channel are substantially perpendicular to each other. The provision of such a sleeve, extending onto the top surface of a length of timber makes it unnecessary to secure the timber to the cap by means of a screw fixing. In the busy environment of a building site, screws and screwdrivers might not be immediately available, with a risk that timber might not be adequately secured into caps of the prior art design. That risk is removed by the present invention. Additionally, the caps are more easily and quickly fitted to the ends of the rebar, without the need for additional tools and fixings. The sleeve completely encircles the length of timber members.
[0008] Said socket is provided with a gripper to releasably grip, in use, a length of rebar inserted therein.
[0009] Said gripper comprises one or more resiliently-deformable elongate fins located on the inside surface of said socket. In this way, when a rebar is inserted into the socket, the fins deform, resiliently, thereby gripping the outside surface of the rebar. The fins may conveniently be formed of plastics material, injection-moulded as part of the socket.
[0010] In such embodiments, it is preferred that said fins extend generally longitudinally along said socket and extend inwardly, but offset from a diameter of said socket. By offsetting the fins from a diameter of the socket (i.e. so that they do not directly point at a centre-line of the socket) the inventor has found that they are more easily displaced sideways, and thereby deformed, as a rebar is inserted into the socket. Preferably, said fins have a rounded edge at the end of the fin closest to the open end of the socket. This allows a rebar to be more easily inserted into the socket without damage to the fins, thereby allowing the device to be reused more often.
[0011] Preferably, such an embodiment of a cap comprises two sets of fins, the first set of fins extending further into the interior of the socket that the second set, and wherein said second set extends longitudinally closer to the open end of the socket than the first set. In this way, a single protective cap may be configured to accept and grip more than one diameter of rebar. The narrower set of fins (extending closer to the open end of the socket) can grip a large diameter of rebar, and also serve to centre a smaller diameter of rebar that can then be gripped by the wider set of fins.
[0012] In any embodiment of a protective cap of the invention it is preferred that a shock absorber is provided at the closed end of said socket, adjacent said sleeve. Providing a shock absorber reduces the risk that the end of a rebar within the socket could burst through the top of the cap in the event of impact to the cap, when in use.
[0013] Shock absorbers such as springs or dampers could be provided, but the device is particularly cost-efficient and simple to manufacture if said shock absorber comprises a deformable projection extending from the closed end of said socket towards the open end of said socket.
[0014] In any embodiment of a protective cap, it is preferred that the internal faces of said sleeve are provided with inwardly-extending ridges, said ridges being tapered such that they have smaller inward extent at an open end of said sleeve. The provision of such ridges eases the insertion of a length of material into the sleeve, whilst also providing grip thereon.
[0015] In any aspect of the invention it is preferred that said channel is rectangular in section. This provides the ideal shape to receive a piece of timber that is likely to be readily available on a building site. An ideal timber member would be a piece of nominal 2 inch x 4 inch (50 mm x 100 mm) timber, and preferred dimensions for the channel are therefore approximately 100 mm wide by 50 mm tall (in use).
[0016] Also in any aspect of the invention, it is preferred that the external edges of said sleeve are rounded. This reduces the chance of injury should a worker come into contact with the edges of the sleeve.
[0017] The invention also provides a method of shielding the ends of reinforcing bar to reduce the risk of impalement injury according to independent claim 10 comprising the steps of positioning two or more protective caps according to any preceding claim on the ends of corresponding reinforcing bars and inserting a length of material through the channels of said caps. The length of timber can be inserted through the channels either before or after the caps are positioned on the ends of the rebar.
Brief Description of the Figures [0018] The invention will be described with reference to the accompanying drawings in which:
Figures 1 and 2 illustrate, in cross-section, prior art devices;
Figures 3 and 4 are elevation views of examples not forming part of the present invention;
Figures 5 and 6 are cross-sectional views of sockets forming part of examples not forming part of the present invention;
Figure 7 is an elevation view of protective caps of the invention in use;
Figure 8 is a perspective view of an embodiment of a protective cap of the invention;
Figures 9 and 10 are longitudinal and transverse cross-sections respectively of an embodiment of a socket forming part of a protective cap of the invention;
Figures 11 and 12 are also longitudinal and transverse cross-sections respectively of an alternative embodiment of a socket forming part of a protective cap of the invention;
Figures 13 and 14 are also longitudinal and transverse cross-sections respectively of an alternative embodiment of a socket forming part of a protective cap of the invention incorporating a shock absorber; and
Figure 15 is a perspective view of a shock absorber forming part of a protective cap of the invention.
Description of Preferred Embodiments [0019] Figure 3 shows an elevation view of a protective cap not forming part of the invention, generally indicated by 8. The cap comprises a tubular socket 9 to receive the end of a length of rebar (not illustrated) within the interior 10 of the socket. The socket 10 is connected to a sleeve 11 defining a channel 12 to receive a length of timber (not illustrated). The exterior edges 13 of the sleeve 11 are rounded. Reinforcing fillets 14 are provided between the sleeve 11 and the socket 9, to add strength to the cap 8.
[0020] In the example illustrated, a hole 15 is provided through the wall of the socket 9 and communicating with its interior 10 to receive a screw thread (not illustrated) that can be used to grip a rebar, in use. The hole may be preferably threaded, but if a relatively soft material (e.g. a plastics material, such as polypropylene) is used for the cap, then threading is not necessary, and a self-tapping screw thread may be employed.
[0021] Fig 4 shows a side elevation view of a protective cap not forming part of the invention, generally indicated by 8.
[0022] Figure 5 shows a partial cross-section through the socket of the device of Figure 4, at the line A-A' in Figure 4. The section shows an example where the cross-section of the interior 10 of the socket 9 is non-circular, and decreases in a direction away from the gripper (in this case in the form of a screw thread) 16, thereby urging, in use, the rebar 17 into two-point contact with the interior wall of the socket 9. A gripping portion 19 is provided on the thread 16 to allow it to be tightened by hand.
[0023] Figure 6 illustrates a further, alternative cross-section of the socket 9 where the interior 10 is of triangular cross-section. It can be seen that if a gripper mechanism urges a rebar 17 in the direction indicated by arrow 18 then this also urges the rebar 17 into two-point contact with the interior wall of the socket 9.
[0024] Figure 7 illustrates protective caps 8 of the invention in use. Three caps 8 are illustrated in elevation view, each of which are attached to an end of a projecting rebar 17. The rebars are approximately collinear, allowing a length of material, such as timber 20 to be slotted through the channels in the sleeves 11 of the caps 8. The timber member 20 thereby not only shields the ends of the rebar 17 to which the caps 8 are connected, but also those other rebar ends that fall beneath the timber member 20.
[0025] Figure 8 illustrates an embodiment of a protective cap of the invention, generally indicated by 8. The cap is made as of one-piece injection-moulded plastics. The cap 8 comprises a tubular socket 9 connected at a closed end to a rectangular sleeve 11. A T-shaped fillet 21 is provided between the socket 9 and the sleeve 11 to provide structural strength. Inwardly-facing ridges 22 are provided within the interior of the sleeve 11. The ridges are provided with a taper, such that their inward extent is smaller at an end of the ridge 23 adjacent an open end of the sleeve.
[0026] Figure 9 illustrates a longitudinal cross-section though a tubular socket forming part of a protective cap of the invention. Figure 10 illustrates a corresponding transverse cross-section. In this embodiment, the interior of the socket 9 is provided with inwardly-facing fins 24, extending longitudinally along the socket from the closed end of the socket 25 towards the open end of the socket 26. This fins 24 have a rounded profile 27 at the end closest to the open end 26 of the socket 9. As may be more clearly seen in Figure 10, the fins 24 extend into the interior 10 of the socket, but not along a diameter of the socket (illustrated by the chain-dotted lines 28), i.e. they do not point directly towards the centre-line of the socket. As discussed above, this makes insertion of a rebar into the socket easier, and prevents damage to the fins.
[0027] Figure 11 illustrates a longitudinal cross-section through a tubular socket forming part of a protective cap of the invention. Figure 12 illustrates a corresponding transverse section. In this embodiment, two sets of fins 24A and 24B are provided. The first set of fins 24A (not illustrated in Figure 11, but corresponding to those illustrated in Figure 9) extend further into the interior of the socket 10 than the second set of fins 24B. i.e. there is a set of wide fins 24A and a set of narrow fins 24B. The second, narrower, set 24B also extend closer to the open end 26 of the socket than the second set 24B. In this way, if a large diameter rebar is inserted into the open end 10 of the socket 9, the narrower set of fins 24B can gip it and hold it in position. The rebar need not be inserted so far into the socket as to be gripped by the wide set of fins 24A. If the cap is used with a smaller diameter rebar, the narrow set of fins 24B act to centre the rebar in the socket 9, and the wider set of fins 24A serve to grip the rebar.
[0028] Figure 13 illustrates a longitudinal cross-section of an embodiment of a tubular socket 9 forming part of a protective cap of the invention. Figure 14 illustrates a corresponding transverse cross-section. Inwardly-facing fins 24 are provided on the interior of the socket 9. A shock absorber 29 is provided at the closed end 25 of the socket. In this embodiment, the shock absorber 29 is in the form of a deformable cross-shaped projection extending from the closed end 25 of the socket 9 towards the open end 26. If an impact force is exerted on the top of the cap in use, the projection can deform to absorb some of the energy of impact, thereby reducing the chance that the rebar would burst through the closed end of the socket, and so improving the protective qualities of the cap. As can be seen in Figure 14, by using a crossshaped shock absorber 29, the shock absorber can extend between the offset fins 24 of the device, allowing it to be a larger size than would otherwise be possible, thus enabling to absorb more energy in the event of impact.
[0029] In the embodiment illustrated in Figs 13 and 14, one set of fins 24 is shown, but the shock absorber could readily be employed with a socket having two sets of fins such as that illustrated in Figures 11 and 12.
[0030] Figure 15 is a perspective view of a shock absorber 29 of the embodiment mounted on the closed end 25 of the socket.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description • US6073415A [00061
Claims (10)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1315032.1A GB2517479A (en) | 2013-08-22 | 2013-08-22 | Safety Device |
GB1401374.2A GB2517526A (en) | 2013-08-22 | 2014-01-27 | Protective cap |
PCT/GB2014/052567 WO2015025168A1 (en) | 2013-08-22 | 2014-08-21 | Safety device |
Publications (1)
Publication Number | Publication Date |
---|---|
DK3036383T3 true DK3036383T3 (en) | 2019-01-21 |
Family
ID=49302066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK14755907.4T DK3036383T3 (en) | 2013-08-22 | 2014-08-21 | SAFETY DEVICE |
Country Status (7)
Country | Link |
---|---|
US (1) | US20160208491A1 (en) |
EP (1) | EP3036383B1 (en) |
AU (2) | AU2014310408A1 (en) |
DK (1) | DK3036383T3 (en) |
GB (3) | GB2517479A (en) |
HK (1) | HK1220999A1 (en) |
WO (1) | WO2015025168A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017205801B4 (en) * | 2017-04-05 | 2020-01-16 | Moritz Wille | Attachment bracket to provide a cover for exposed concrete walls |
US11542709B2 (en) | 2020-01-06 | 2023-01-03 | Jd Russell Company | Protective cap for reinforcement bars |
US10927549B1 (en) * | 2020-01-07 | 2021-02-23 | Bryan Lunsford | Rebar safety cover device and methods |
CN112049329B (en) * | 2020-08-31 | 2022-04-19 | 上海家树建设集团有限公司 | Prefabricated post roof beam component reinforcing bar stop device |
US11988001B2 (en) * | 2021-08-23 | 2024-05-21 | Jeffrey Marshall | Impalement hazard protective cap |
CN115075475A (en) * | 2022-08-05 | 2022-09-20 | 中信国安建工集团有限公司 | Pre-buried drawknot muscle positioning mechanism |
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US1733765A (en) * | 1928-04-23 | 1929-10-29 | Kalman Steel Co | Building construction |
US2191979A (en) * | 1937-12-28 | 1940-02-27 | Merwin Mfg Company | Sleeper anchor |
US2500636A (en) * | 1945-03-27 | 1950-03-14 | George W Schumacher | Hanging device for wooden beams |
US3030131A (en) * | 1958-05-23 | 1962-04-17 | Grayhill | Fastener construction |
US3831333A (en) * | 1971-11-11 | 1974-08-27 | Gypsum Co | Crimped end load bearing member and assemble thereof |
NO153901C (en) * | 1983-11-07 | 1986-06-11 | Kristoffer Idland | SOEYLES SHOES, AND PROCEDURES FOR FOLDING SOEYLES SHOES. |
GB8507191D0 (en) * | 1985-03-20 | 1985-04-24 | Cladcolor Profiling Ltd | Support system |
US4575985A (en) * | 1985-06-24 | 1986-03-18 | Eckenrodt Richard H | Rebar saddle |
US4897979A (en) * | 1988-08-03 | 1990-02-06 | Simpson Strong-Tie Company, Inc. | Multiple wood truss connection |
US5363618A (en) * | 1990-03-22 | 1994-11-15 | Underwood Daniel C | Construction site safety |
US5301485A (en) * | 1991-01-28 | 1994-04-12 | Shaw Lee A | Nelson stud screed post assembly |
US5816735A (en) * | 1993-07-16 | 1998-10-06 | Tormek Ab | Female part that can be locked in selective positions on a round rod |
US5618125A (en) * | 1994-01-18 | 1997-04-08 | Permaban North America, Inc. | Dowell alignment apparatus |
US5381636A (en) * | 1994-05-18 | 1995-01-17 | Don De Cristo Concrete Accessories, Inc. | Protective cover for concrete reinforcing bars |
AUPM911594A0 (en) * | 1994-10-28 | 1994-11-24 | Underwood, Daniel Charles | A protective end cap |
US5600927A (en) * | 1995-06-14 | 1997-02-11 | Kennon; Add T. | Strapped rebar end protector |
US5729941A (en) * | 1996-04-09 | 1998-03-24 | Don De Cristo Concrete Accessories, Inc. | Protective cover for concrete reinforcing bar |
US6073415A (en) * | 1996-05-22 | 2000-06-13 | Carnicle; Michael A. | Device and method for protecting from reinforcement bar injury |
US5826398A (en) * | 1996-05-22 | 1998-10-27 | Carnicle; Michael A. | Device and method for protecting from reinforcement bar injury |
USD405349S (en) * | 1998-01-13 | 1999-02-09 | Orth Dennis E | Rebar cap |
USD416631S (en) * | 1998-01-20 | 1999-11-16 | Lomont Molding, Inc. | Reinforcing bar protection cap |
USD436311S1 (en) * | 1998-05-15 | 2001-01-16 | Nefab Ab | Set of locking members |
US6085478A (en) * | 1998-08-11 | 2000-07-11 | Deslauriers, Inc. | Impalement prevention safety system |
US5943836A (en) * | 1998-09-10 | 1999-08-31 | Don De Cristo Concrete Accessories, Inc. | Protective cover for concrete reinforcing bar |
US6523321B1 (en) * | 1999-08-27 | 2003-02-25 | Simpson Strong-Tie Company, Inc. | Snap-in hanger |
US6612082B2 (en) * | 2001-02-12 | 2003-09-02 | Lomont Molding, Inc. | Concrete reinforcing bar protective cover |
US6662514B2 (en) * | 2001-02-20 | 2003-12-16 | Deslauriers, Inc. | Impalement protection safety system |
US6857235B2 (en) * | 2001-02-23 | 2005-02-22 | Dayton Superior Corporation | Protective cover for reinforcing bar |
USD508199S1 (en) * | 2003-10-20 | 2005-08-09 | Ss3 Storage Systems Llc | Grommet |
US8250827B2 (en) * | 2006-06-26 | 2012-08-28 | Simpson Strong-Tie Company, Inc. | Hanger with gripping tabs |
US20090313927A1 (en) * | 2006-11-20 | 2009-12-24 | Myers Jr Robert H | Protective cap for reinforcing bars |
US7472522B2 (en) * | 2007-01-17 | 2009-01-06 | Mutual Industries North, Inc. | Protective rebar cover |
US20090107067A1 (en) * | 2007-10-29 | 2009-04-30 | Josh Beery | Safety caps for foundation rebar, stakes and anchor bolts and methods of use |
US8011149B2 (en) * | 2008-06-27 | 2011-09-06 | Knudsen N Eric | Post sleeve assembly |
NZ590597A (en) * | 2008-07-04 | 2012-05-25 | Underwood Companies Holdings Pty Ltd | Protective cap for reinforcing starter bars containing a steel disc wth convex/concave curved flange and central depression aligned with a tubular stem with blind bore and support webs between the cap and stem |
USD624804S1 (en) * | 2008-11-10 | 2010-10-05 | Independent Fastening Systems Pty Ltd | Bracket for supporting railing from a post |
USD640916S1 (en) * | 2009-10-12 | 2011-07-05 | Simpson Strong-Tie Company, Inc. | Retrofitable valley truss clip |
US8776464B2 (en) * | 2011-05-17 | 2014-07-15 | Vasken Kassarjian | Protective cover for reinforcing bar |
US8925259B2 (en) * | 2012-12-01 | 2015-01-06 | William F. Reed | Adjustable universal screed guide/control joint clip system |
FR3011018B1 (en) * | 2013-09-20 | 2016-02-26 | Novap | PROTECTIVE TIP FOR REINFORCEMENT BAR |
USD716638S1 (en) * | 2013-11-26 | 2014-11-04 | Curt McDonald | Rebar cap |
-
2013
- 2013-08-22 GB GB1315032.1A patent/GB2517479A/en not_active Withdrawn
-
2014
- 2014-01-27 GB GB1401374.2A patent/GB2517526A/en not_active Withdrawn
- 2014-08-21 AU AU2014310408A patent/AU2014310408A1/en not_active Abandoned
- 2014-08-21 US US14/913,209 patent/US20160208491A1/en not_active Abandoned
- 2014-08-21 DK DK14755907.4T patent/DK3036383T3/en active
- 2014-08-21 EP EP14755907.4A patent/EP3036383B1/en active Active
- 2014-08-21 GB GB1602838.3A patent/GB2535885A/en not_active Withdrawn
- 2014-08-21 WO PCT/GB2014/052567 patent/WO2015025168A1/en active Application Filing
-
2016
- 2016-07-26 HK HK16108917.5A patent/HK1220999A1/en not_active IP Right Cessation
-
2018
- 2018-07-24 AU AU2018208665A patent/AU2018208665A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP3036383B1 (en) | 2018-12-12 |
GB2517479A (en) | 2015-02-25 |
EP3036383A1 (en) | 2016-06-29 |
US20160208491A1 (en) | 2016-07-21 |
GB2535885A (en) | 2016-08-31 |
GB201401374D0 (en) | 2014-03-12 |
GB201315032D0 (en) | 2013-10-02 |
WO2015025168A1 (en) | 2015-02-26 |
HK1220999A1 (en) | 2017-05-19 |
AU2014310408A1 (en) | 2016-03-17 |
GB2517526A (en) | 2015-02-25 |
AU2014310408A2 (en) | 2016-04-21 |
AU2018208665A1 (en) | 2018-08-09 |
GB201602838D0 (en) | 2016-04-06 |
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