US20160208491A1 - Safety device - Google Patents
Safety device Download PDFInfo
- Publication number
- US20160208491A1 US20160208491A1 US14/913,209 US201414913209A US2016208491A1 US 20160208491 A1 US20160208491 A1 US 20160208491A1 US 201414913209 A US201414913209 A US 201414913209A US 2016208491 A1 US2016208491 A1 US 2016208491A1
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- US
- United States
- Prior art keywords
- socket
- protective cap
- rebar
- fins
- cap according
- 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.)
- Abandoned
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 230000006378 damage Effects 0.000 claims abstract description 13
- 208000027418 Wounds and injury Diseases 0.000 claims abstract description 11
- 208000014674 injury Diseases 0.000 claims abstract description 11
- 239000006096 absorbing agent Substances 0.000 claims description 14
- 230000035939 shock Effects 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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
-
- 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
Definitions
- 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.
- rebars steel reinforcing bars
- rebars steel reinforcing bars
- the rebars are typically of approximately circular cross-section having a diameter most commonly between 10-40 mm, depending on the reinforcing requirement.
- the rebars are usually made of steel, and often have a coating of rust on them, from exposure to the elements. 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, for example, 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.
- FIG. 1 One such known device comprises a circular cap, illustrated in cross-section in FIG. 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 .
- 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.
- FIG. 2 An alternative design has also been introduced, sold (primarily in Canada) under the trade name “Carnie Cap”, and illustrated in cross-section FIG. 2 , generally indicated by 4 .
- 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 .
- a protective cap for preventing impalement injury on rebar, comprising: a tubular socket to receive an end of a length of rebar; the socket being attached to a sleeve defining a channel to receive and enclose a length of timber; and wherein the axes of the socket and the 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 preferably completely encloses (i.e. completely encircles) the timber members.
- the socket is provided with a gripper to releasably grip, in use, a length of rebar inserted therein.
- a gripper could comprise a moveable clamp arrangement, or one or more longitudinal slots in the socket member which, if made of a deformable, and preferably resiliently deformable, material can be caused to grip a rebar by a clamp that encircles the socket.
- the gripper comprises a screw thread. This can be mounted in a threaded hole in the side of the socket, so that the thread can be screwed into the socket to urge a rebar against the opposing inner wall of the socket.
- a gripping portion can be mounted on the screw thread to allow it to be operated by hand.
- the lateral cross-section of the tubular socket reduces from one side of the socket to the other and the gripper is arranged to urge a rebar, in use, towards the reduced cross-section region of the socket.
- the cross section is preferably non-circular, and is arranged that when a rebar is urged against an inside wall of the socket, at least two points of contact between the rebar and the socket wall are made, thereby increasing the grip on the rebar.
- the gripper comprises one or more resiliently-deformable elongate fins located on the inside surface of the socket.
- the fins may conveniently be formed of plastics material, injection-moulded as part of the socket.
- the fins extend generally longitudinally along the socket and extend inwardly, but offset from a diameter 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.
- the 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.
- 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 the second set extends longitudinally closer to the open end of the socket than the first set.
- 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 center a smaller diameter of rebar that can then be gripped by the wider set of fins.
- a shock absorber is provided at the closed end of the socket, adjacent the 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.
- shock absorbers such as springs or dampers could be provided, but the device is particularly cost-efficient and simple to manufacture if the shock absorber comprises a deformable projection extending from the closed end of the socket towards the open end of the socket.
- the internal faces of the sleeve are provided with inwardly-extending ridges, the ridges being tapered such that they have smaller inward extent at an open end of the sleeve.
- the provision of such ridges eases the insertion of a length of material into the sleeve, while also providing grip thereon.
- the 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 ⁇ 4 inch (50 mm ⁇ 100 mm) timber, and preferred dimensions for the channel are therefore approximately 100 mm wide by 50 mm tall (in use).
- the external edges of the sleeve are rounded. This reduces the chance of injury should a worker come into contact with the edges of the sleeve.
- a protective cap substantially as described herein with reference to and as illustrated by any appropriate combination of FIGS. 3 to 7 .
- Embodiments also provide a method of shielding the ends of reinforcing bar to reduce the risk of impalement injury comprising the steps of positioning two or more protective caps on the ends of corresponding reinforcing bars and inserting a length of material through the channels of the caps.
- the length of material preferably a length of wood
- the method further comprises the step of activating a gripper on two or more of the caps such that they grip the corresponding end of reinforcing bar.
- Also included within the scope of the invention is a method of shielding the ends of reinforcing bar to reduce the risk of impalement injury substantially as described herein with reference to and as illustrated by any appropriate combination of FIGS. 3 to 7 .
- FIGS. 1 and 2 illustrate, in cross-section, prior art devices
- FIGS. 3 and 4 are elevation views of embodiments of the present invention.
- FIGS. 5 and 6 are cross-sectional views of sockets forming part of embodiments of the present invention.
- FIG. 7 is an elevation view of protective caps of embodiments of the invention in use
- FIG. 8 is a perspective view of an embodiment of a protective cap of embodiments of the invention.
- FIGS. 9 and 10 are longitudinal and transverse cross-sections respectively of an embodiment of a socket forming part of a protective cap of embodiments of the invention.
- FIGS. 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 embodiments of the invention.
- FIGS. 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 embodiments of the invention incorporating a shock absorber;
- FIG. 15 is a perspective view of a shock absorber forming part of a protective cap of embodiments of the invention.
- FIG. 3 shows an elevation view of a protective cap of embodiments 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 .
- 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.
- FIG. 4 shows a side elevation view of a protective cap of an embodiment of the invention, generally indicated by 8 .
- FIG. 5 shows a partial cross-section through the socket of the device of FIG. 4 , at the line AA′ in FIG. 4 .
- the section shows an embodiment 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.
- FIG. 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 .
- FIG. 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 .
- FIG. 8 illustrates a preferred embodiment of a protective cap of the invention, generally indicated by 8 .
- the cap may conveniently be made as of one-piece injection-molded 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.
- FIG. 9 illustrates a longitudinal cross-section though a tubular socket forming part of a protective cap of the invention.
- FIG. 10 illustrates a corresponding transverse cross-section.
- 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 .
- the fins 24 have a rounded profile 27 at the end closest to the open end 26 of the socket 9 .
- 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 centerline of the socket. As discussed above, this makes insertion of a rebar into the socket easier, and prevents damage to the fins.
- FIG. 11 illustrates a longitudinal cross-section through a tubular socket forming part of a protective cap of the invention.
- FIG. 12 illustrates a corresponding transverse section.
- the first set of fins 24 A (not illustrated in FIG. 11 , but corresponding to those illustrated in FIG. 9 ) extend further into the interior of the socket 10 than the second set of fins 24 B. i.e. there is a set of wide fins 24 A and a set of narrow fins 24 B.
- the second, narrower, set 24 B also extend closer to the open end 26 of the socket than the second set 24 B.
- the narrower set of fins 24 B can grip 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 24 A. If the cap is used with a smaller diameter rebar, the narrow set of fins 24 B act to center the rebar in the socket 9 , and the wider set of fins 24 A serve to grip the rebar.
- FIG. 13 illustrates a longitudinal cross-section of an embodiment of a tubular socket 9 forming part of a protective cap of the invention.
- FIG. 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.
- 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.
- 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.
- 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 FIGS. 11 and 12 .
- FIG. 15 is a perspective view of a shock absorber 29 of the embodiment mounted on the closed end 25 of the socket.
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- 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)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
Description
- The present application is a National Phase entry of PCT Application No. PCT/GB2014/052567, filed Aug. 21, 2014, which claims priority from GB Patent Application No. 1315032.1, filed Aug. 22, 2013 and GB Patent Application No. 1401374.2, filed Jan. 27, 2014, said applications being hereby incorporated by reference herein in their entirety.
- 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.
- 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 10-40 mm, depending on the reinforcing requirement.
- The rebars are usually made of steel, and often have a coating of rust on them, from exposure to the elements. 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, for example, 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.
- 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
FIG. 1 , and generally indicated by 1. Thecap 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. - An alternative design has also been introduced, sold (primarily in Canada) under the trade name “Carnie Cap”, and illustrated in cross-section
FIG. 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. While this is an improvement on the individual caps illustrated inFIG. 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 re-introducing the impalement risk to the workplace. - It is among the objects of the present invention to attempt a solution to this and other problems.
- Accordingly, embodiments of the invention provide a protective cap, for preventing impalement injury on rebar, comprising: a tubular socket to receive an end of a length of rebar; the socket being attached to a sleeve defining a channel to receive and enclose a length of timber; and wherein the axes of the socket and the 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 preferably completely encloses (i.e. completely encircles) the timber members.
- Preferably, the socket is provided with a gripper to releasably grip, in use, a length of rebar inserted therein. Such a gripper could comprise a moveable clamp arrangement, or one or more longitudinal slots in the socket member which, if made of a deformable, and preferably resiliently deformable, material can be caused to grip a rebar by a clamp that encircles the socket. Preferably, however, for ease of manufacture, the gripper comprises a screw thread. This can be mounted in a threaded hole in the side of the socket, so that the thread can be screwed into the socket to urge a rebar against the opposing inner wall of the socket. A gripping portion can be mounted on the screw thread to allow it to be operated by hand.
- Where a gripper is used, it is preferred that the lateral cross-section of the tubular socket (perpendicular to the axis of the socket) reduces from one side of the socket to the other and the gripper is arranged to urge a rebar, in use, towards the reduced cross-section region of the socket. The cross section is preferably non-circular, and is arranged that when a rebar is urged against an inside wall of the socket, at least two points of contact between the rebar and the socket wall are made, thereby increasing the grip on the rebar.
- In alternative embodiments, where a gripper is provided, it is preferred that the gripper comprises one or more resiliently-deformable elongate fins located on the inside surface of the 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.
- In such embodiments, it is preferred that the fins extend generally longitudinally along the socket and extend inwardly, but offset from a diameter of the socket. By offsetting the fins from a diameter of the socket (i.e. so that they do not directly point at a centerline 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, the 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.
- 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 the 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 center a smaller diameter of rebar that can then be gripped by the wider set of fins.
- In any embodiment of a protective cap of embodiments of the invention it is preferred that a shock absorber is provided at the closed end of the socket, adjacent the 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.
- Shock absorbers such as springs or dampers could be provided, but the device is particularly cost-efficient and simple to manufacture if the shock absorber comprises a deformable projection extending from the closed end of the socket towards the open end of the socket.
- In any embodiment of a protective cap, it is preferred that the internal faces of the sleeve are provided with inwardly-extending ridges, the ridges being tapered such that they have smaller inward extent at an open end of the sleeve. The provision of such ridges eases the insertion of a length of material into the sleeve, while also providing grip thereon.
- In embodiments it is preferred that the 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×4 inch (50 mm×100 mm) timber, and preferred dimensions for the channel are therefore approximately 100 mm wide by 50 mm tall (in use).
- Also in embodiments, it is preferred that the external edges of the sleeve are rounded. This reduces the chance of injury should a worker come into contact with the edges of the sleeve.
- Also included within the scope of the invention is a protective cap substantially as described herein with reference to and as illustrated by any appropriate combination of
FIGS. 3 to 7 . - Embodiments also provide a method of shielding the ends of reinforcing bar to reduce the risk of impalement injury comprising the steps of positioning two or more protective caps on the ends of corresponding reinforcing bars and inserting a length of material through the channels of the caps. The length of material (preferably a length of wood) can be inserted through the channels either before or after the caps are positioned on the ends of the rebar.
- Preferably, the method further comprises the step of activating a gripper on two or more of the caps such that they grip the corresponding end of reinforcing bar.
- Also included within the scope of the invention is a method of shielding the ends of reinforcing bar to reduce the risk of impalement injury substantially as described herein with reference to and as illustrated by any appropriate combination of
FIGS. 3 to 7 . - The invention will be described with reference to the accompanying drawings in which:
-
FIGS. 1 and 2 illustrate, in cross-section, prior art devices; -
FIGS. 3 and 4 are elevation views of embodiments of the present invention; -
FIGS. 5 and 6 are cross-sectional views of sockets forming part of embodiments of the present invention; -
FIG. 7 is an elevation view of protective caps of embodiments of the invention in use; -
FIG. 8 is a perspective view of an embodiment of a protective cap of embodiments of the invention; -
FIGS. 9 and 10 are longitudinal and transverse cross-sections respectively of an embodiment of a socket forming part of a protective cap of embodiments of the invention; -
FIGS. 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 embodiments of the invention; -
FIGS. 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 embodiments of the invention incorporating a shock absorber; and -
FIG. 15 is a perspective view of a shock absorber forming part of a protective cap of embodiments of the invention. -
FIG. 3 shows an elevation view of a protective cap of embodiments 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 theinterior 10 of the socket. Thesocket 10 is connected to a sleeve 11 defining achannel 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 thecap 8. - In the embodiment 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. -
FIG. 4 shows a side elevation view of a protective cap of an embodiment of the invention, generally indicated by 8. -
FIG. 5 shows a partial cross-section through the socket of the device ofFIG. 4 , at the line AA′ inFIG. 4 . The section shows an embodiment 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. -
FIG. 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. -
FIG. 7 illustratesprotective caps 8 of the invention in use. Threecaps 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 astimber 20 to be slotted through the channels in the sleeves 11 of thecaps 8. Thetimber member 20 thereby not only shields the ends of the rebar 17 to which thecaps 8 are connected, but also those other rebar ends that fall beneath thetimber member 20. -
FIG. 8 illustrates a preferred embodiment of a protective cap of the invention, generally indicated by 8. The cap may conveniently be made as of one-piece injection-molded plastics. Thecap 8 comprises a tubular socket 9 connected at a closed end to a rectangular sleeve 11. A T-shapedfillet 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 theridge 23 adjacent an open end of the sleeve. -
FIG. 9 illustrates a longitudinal cross-section though a tubular socket forming part of a protective cap of the invention.FIG. 10 illustrates a corresponding transverse cross-section. In this embodiment, the interior of the socket 9 is provided with inwardly-facingfins 24, extending longitudinally along the socket from the closed end of thesocket 25 towards the open end of thesocket 26. Thefins 24 have a rounded profile 27 at the end closest to theopen end 26 of the socket 9. As may be more clearly seen inFIG. 10 , thefins 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 centerline of the socket. As discussed above, this makes insertion of a rebar into the socket easier, and prevents damage to the fins. -
FIG. 11 illustrates a longitudinal cross-section through a tubular socket forming part of a protective cap of the invention.FIG. 12 illustrates a corresponding transverse section. In this embodiment, two sets offins 24A and 24B are provided. The first set offins 24A (not illustrated inFIG. 11 , but corresponding to those illustrated inFIG. 9 ) extend further into the interior of thesocket 10 than the second set of fins 24B. i.e. there is a set ofwide fins 24A and a set of narrow fins 24B. The second, narrower, set 24B also extend closer to theopen end 26 of the socket than the second set 24B. In this way, if a large diameter rebar is inserted into theopen end 10 of the socket 9, the narrower set of fins 24B can grip 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 offins 24A. If the cap is used with a smaller diameter rebar, the narrow set of fins 24B act to center the rebar in the socket 9, and the wider set offins 24A serve to grip the rebar. -
FIG. 13 illustrates a longitudinal cross-section of an embodiment of a tubular socket 9 forming part of a protective cap of the invention.FIG. 14 illustrates a corresponding transverse cross-section. Inwardly-facingfins 24 are provided on the interior of the socket 9. A shock absorber 29 is provided at theclosed end 25 of the socket. In this embodiment, the shock absorber 29 is in the form of a deformable cross-shaped projection extending from theclosed end 25 of the socket 9 towards theopen 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 inFIG. 14 , by using a cross-shaped shock absorber 29, the shock absorber can extend between the offsetfins 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. - In the embodiment illustrated in
FIGS. 13 and 14 , one set offins 24 is shown, but the shock absorber could readily be employed with a socket having two sets of fins such as that illustrated inFIGS. 11 and 12 . -
FIG. 15 is a perspective view of a shock absorber 29 of the embodiment mounted on theclosed end 25 of the socket.
Claims (12)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1315032.1A GB2517479A (en) | 2013-08-22 | 2013-08-22 | Safety Device |
GB1315032.1 | 2013-08-22 | ||
GB1401374.2A GB2517526A (en) | 2013-08-22 | 2014-01-27 | Protective cap |
GB1401374.2 | 2014-01-27 | ||
PCT/GB2014/052567 WO2015025168A1 (en) | 2013-08-22 | 2014-08-21 | Safety device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20160208491A1 true US20160208491A1 (en) | 2016-07-21 |
Family
ID=49302066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/913,209 Abandoned US20160208491A1 (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) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017205801A1 (en) * | 2017-04-05 | 2018-10-11 | Moritz Wille | Attachment bracket for providing cover of exposed concrete walls |
US10927549B1 (en) * | 2020-01-07 | 2021-02-23 | Bryan Lunsford | Rebar safety cover device and methods |
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 |
US11542709B2 (en) | 2020-01-06 | 2023-01-03 | Jd Russell Company | Protective cap for reinforcement bars |
US20230057280A1 (en) * | 2021-08-23 | 2023-02-23 | Jeffrey Marshall | Impalement hazard protective cap |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017205801A1 (en) * | 2017-04-05 | 2018-10-11 | Moritz Wille | Attachment bracket for providing cover of exposed concrete walls |
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 |
US20230057280A1 (en) * | 2021-08-23 | 2023-02-23 | Jeffrey Marshall | Impalement hazard protective cap |
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 |
Also Published As
Publication number | Publication date |
---|---|
GB2517526A (en) | 2015-02-25 |
AU2018208665A1 (en) | 2018-08-09 |
GB201315032D0 (en) | 2013-10-02 |
GB201602838D0 (en) | 2016-04-06 |
WO2015025168A1 (en) | 2015-02-26 |
DK3036383T3 (en) | 2019-01-21 |
EP3036383A1 (en) | 2016-06-29 |
HK1220999A1 (en) | 2017-05-19 |
AU2014310408A1 (en) | 2016-03-17 |
EP3036383B1 (en) | 2018-12-12 |
AU2014310408A2 (en) | 2016-04-21 |
GB2517479A (en) | 2015-02-25 |
GB2535885A (en) | 2016-08-31 |
GB201401374D0 (en) | 2014-03-12 |
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Legal Events
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