WO2021215990A1 - Protective cap - Google Patents
Protective cap Download PDFInfo
- Publication number
- WO2021215990A1 WO2021215990A1 PCT/SE2021/050368 SE2021050368W WO2021215990A1 WO 2021215990 A1 WO2021215990 A1 WO 2021215990A1 SE 2021050368 W SE2021050368 W SE 2021050368W WO 2021215990 A1 WO2021215990 A1 WO 2021215990A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- protective cap
- protective
- cap
- mounting sleeve
- waist
- Prior art date
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 98
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- HSRJKNPTNIJEKV-UHFFFAOYSA-N Guaifenesin Chemical compound COC1=CC=CC=C1OCC(O)CO HSRJKNPTNIJEKV-UHFFFAOYSA-N 0.000 claims 1
- 230000006378 damage Effects 0.000 description 9
- 208000027418 Wounds and injury Diseases 0.000 description 7
- 208000014674 injury Diseases 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 210000001520 comb Anatomy 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
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
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
- E04G21/3252—Protections, e.g. cover, caps, against impaling on starter reinforcement bars
Definitions
- the invention relates to a protective cap intended to be mounted on reinforc ing bars or other metal bars.
- the field to which the invention substantially relates is building sites, where reinforcing bars are handled. Already at delivery or alternatively when the reinforcing bars are sheared/cut at a work place to obtain the right length, they get a sharp shearing/cutting surface that can be both pointed and/or sharp like a knife edge. Protruding, sheared and/or upright metal bars consti tute a risk of personal injury during handling, or merely during various activi ties around them, if the ends of the bars are not encapsulated. This could be cuts and/or sticking injuries.
- plastic caps are currently used, which are mounted over the pointed and/or sharp end.
- Such caps can have multiple appearances with the common fea ture that they can encapsulate the pointed and/or sharp end. They should also ensure that they remain on the bars in the case of e.g. strong wind or merely while the work is being performed.
- a common design is a cap with an inner straight and tubular portion, provided with some type of helical, longitudinal or transverse inner ribs, which can be resilient and fold aside, when the caps are mounted to the reinforcing bars, without the ribs coming loose.
- a cap is obtained that can be used for various dimensions of bars and at the same time, the resilient ribs lock the cap in place on the bar within the specific bar dimension range, for which the cap is dimensioned.
- Another common appearance to handle various dimensions of bars can be that the cap is provided with a resilient waist.
- the body of the cap between the upper portion/cap and the lower portion/entrance for the reinforcing bar is provided with longitudinal slits and is tapered from both directions to be able to be resilient and expand to differ ent extents depending on the bar dimension used.
- the upper portion/head of the cap can externally be either straight, somewhat rounded or be provided with a wider surface like a mushroom head. This means that the head has a larger outer diameter than the body diameter of the cap itself.
- the object of such a wider head is substantially to distribute the force on a larger surface, or merely not aggravate puncture damage if a person trips over an upright reinforcing bar.
- the size of the head has no significant importance. It is rather the shell thickness of the cap that is most important or merely the material of the cap.
- the material of the caps can vary, but they are usually made of polyethylene or polypropylene.
- metal discs can be placed or cast inside the caps to ensure that a reinforcing bar cannot cut through the plastic of the head.
- caps those with a waist, the hourglass model.
- the waist is often placed in the middle of the cap and is outwardly resilient to be able to be useful for various dimensions of bars. They can be provided with a broadened head or just be terminated without broadening.
- a common feature for these and other caps is that the user usually grips the head of the caps for application/attachment onto the bar. They grab it and press the cap over the bar by pushing on the head.
- Reinforcing bars are often provided with external combs for increased bond ing and fixing in the concrete when the reinforcement is cast.
- a normal di mension range for the protective caps is that they must be able to cover rein forcing bars from 6 mm up to 16 mm. Including combs, this in practice means that the reinforcing bars are approx. 7-19 mm in their largest outer diameter.
- the upper and terminating portion of a cap internally at the head should have a diameter of 19 mm, while it is advantageous if the nar rowest portion of the waist has a diameter of 6 mm or slightly less. In this manner, the fixation of the resilient waist around all dimensions in the range is ensured, and at the same time it is ensured that the cap can actually also enclose the largest bars in the dimension range.
- caps with a waist can be difficult to mount on the largest dimensions of reinforcing bars.
- the outer wall of the cap is completely circumferential and without openings.
- These caps have a rigid body without a resilient waist, and there is no risk that any reinforcing bar can protrude through the side wall at application.
- the body/side wall of caps with a resilient waist are instead slit, merely to be able to be resilient, but both types can be provided with a head that is larger than the diameter of the body of the cap or only with the same diameter as the body.
- a traditional cap with a circumferential side wall without holes or slits can ei ther be pressed or hammered onto the reinforcing bar.
- the inner locking and folding ribs of the cap are cast together with the inner top surface and inner circumferential side wall of the cap.
- it is possible to circumvent this by making small through-going open ings in the head of the cap right above the inner ribs, but then the protective function of the cap is reduced or eliminated partially or fully.
- There is a risk that small and narrow dimensions of reinforcing bars are pressed out through these openings in the head which may lead to serious personal injury or even risks being fatal, if a person trips over them.
- a solution to this problem is protective caps with a waist, where in the waist more easily springs aside, when it is applied on thicker dimen sions.
- protective caps with a waist also have disadvantages that may lead to an increased risk of personal injury in use compared with straight caps.
- the circumferential side wall is slit in the longitudinal direction of the cap, often 6 relatively long slits that are 2-3 mm wide for caps in the dimension range of 6-16 mm, there is a risk that narrow bars, e.g. 6 mm, can protrude through some of all these slits during mounting.
- Another disadvantage is that the waist can close when the cap is to be mounted on a reinforcing bar hav ing a thicker dimension, instead of being outwardly resilient, which means that a stronger force is necessary for mounting the cap. This can lead to in creased risk of shearing injuries, if one slips.
- An object of the invention is therefore to provide an improved protective cap for reinforcing bars. Another object of the invention is to provide a mounting sleeve for a protective cap. Another object of the invention is to provide a method for mounting such a protective cap.
- the object of the invention is solved in that the lower portion comprises an outwardly projecting lower bear ing surface arranged on a lower flange, where the inner diameter of the lower flange is equal to or larger than the diameter of the protective surface of the upper portion.
- a protective cap which can be mounted on reinforcing bars with various dimensions in a sim ple and more personally safe manner.
- the protective cap is provided with a protruding flange on its lower portion.
- the protective cap can be mounted in a simple and safe manner by the protective cap being pulled onto the reinforcing bar in stead of being pushed on it.
- the result is that the waist is stretched out and expands instead of being squeezed together and close, which it does if the cap is pressed/hammered onto the reinforcing bar.
- the protective cap can either be pulled on to the reinforcing bar by manual power by a worker pulling on the protective cap, or the protective cap can be mounted by means of a mounting sleeve.
- the mounting sleeve is positioned against the lower bear ing surface, and a force is applied on the upper edge of the mounting sleeve, which drives the protective cap onto the reinforcing bar.
- Fig. 1 shows a first embodiment of a protective cap according to the inven tion
- Fig. 2 shows a second embodiment of a protective cap according to the invention
- Fig. 3 shows a third embodiment of a protective cap according to the inven tion
- Fig. 4 shows a mounting sleeve according to the invention.
- Fig. 1 shows a first example of a protective cap 1 according to the invention.
- the protective cap has an upper portion 2, a lower portion 3 as well as a waist 4 arranged between the upper portion and the lower portion.
- the upper portion is closed and is provided with an upper protective surface 6, which is intended to cover the end of the reinforcing bar, so that damages are avoid ed.
- the edges of the upper protective surface may be somewhat rounded.
- the interior side of the protective surface is intended to abut against the end of the reinforcing bar, and can be provided with a metal disc to increase the strength and resistance of the upper protective surface.
- the protective cap is provided with slits 7 that enable the waist to be outwardly resilient when the protective cap is mounted on reinforcing bars in the upper range of the di mensions, for which the protective cap is intended.
- the pro tective cap is intended to be mounted on reinforcing bars in the dimension range of 6 to 16 mm.
- the lower portion 3 of the protective cap 1 is provided with a protruding flange 5, which in the shown example extends around the entire circumfer ence 9 of the protective cap.
- the flange 5 is in the shown example arranged at the bottom of the lower portion, but it could also be arranged slightly higher on the lower portion, below the slits.
- the largest outer diameter of the lower portion 3, which is the same as the inner diameter of the flange 5, is equal to or larger than the largest outer diameter of the upper portion 2.
- the flange has a width of a number of mm, e.g.
- the protective cap can in a sim ple and safe manner and with a lower force than was previously possible be pulled onto the reinforcing bar, which increases the safety, as the protective cap does not risk to be damaged during mounting, as well as it saves time as the mounting of the protective cap proceeds faster.
- Fig. 2 shows a second example of a protective cap.
- the flange is discontinued at some points, so that a number of edge portions 10 are formed.
- the flange still gives the worker a good grip on the protective cap 1 and the protective cap 1 can still be mounted with a mounting sleeve, but the edge portions 10 saves a few percentages of material.
- Fig. 3 shows yet another example of a protective cap.
- the upper protective surface 6 is enlarged, which can offer increased personal protection.
- the edge of the upper protective surface 6 is provided with recesses 11 , which are intended to cooperate with inner flanges in a mounting sleeve.
- the inner flanges can thereby abut against the lower bearing surface 8 of the flange 5 without the diameter of the lower flange having to be larger than the diameter of the up per protective surface.
- Fig. 4 shows an example of a mounting sleeve 20.
- the mounting sleeve is provided with an upper edge 21 and a lower edge 22.
- the upper edge 21 is in the shown example closed to increase the contact surface when the pro tective sleeve is mounted with e.g. a hammer.
- the upper edge 21 is here provided with an enlarged head 23 with a somewhat rounded shape and a diameter that is larger than the body of the mounting sleeve. This will provide a larger contact surface when a worker applies the protective cap with the hand.
- the mounting sleeve is advantageously manufactured in plastic or al uminium and can e.g. be moulded or cast. It is also possible to extrude the mounting sleeve.
- the mounting sleeve will be symmetrical, and the upper edge 21 and the lower edge 22 will be identical.
- the mounting sleeve is here plain on the inside, so that it fits protective caps with a lower flange 5 or edge portions 10 that have a larger diameter than the head of the protective cap.
- the mounting sleeve 20 may be provided with inner ribs, which are intended to cooperate with recesses in a protective cap with an enlarged upper protective surface.
- the inner ribs will bear on the lower bear ing surface on protective caps with a flange that runs around the entire pro tective casing. With the proper orientation, the inner ribs will also be able to bear on the edge portions 10.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Buffer Packaging (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
A protective cap (1) intended to be mounted on the end of a reinforcing bar, wherein the protective cap (1) comprises an upper portion (2), a lower portion (3) and an intermediate waist (4), where the cross section of the waist is smaller than the cross section of the upper portion (2) and/or the lower portion (3), wherein the upper portion (2) comprises a protective surface (6), where the protective cap (1) is provided with slits (7) that enable the waist to be outwardly resilient when the protective cap is mounted on a reinforcing bar, where the lower portion (3) comprises an outwardly projecting lower bearing surface (8) arranged on a flange (5), and where the inner diameter of the flange (5) is equal to or larger than the diameter of the protective surface (6) of the upper portion (2).
Description
TITLE
PROTECTIVE CAP
TECHNICAL FIELD
The invention relates to a protective cap intended to be mounted on reinforc ing bars or other metal bars.
PRIOR ART
The field to which the invention substantially relates is building sites, where reinforcing bars are handled. Already at delivery or alternatively when the reinforcing bars are sheared/cut at a work place to obtain the right length, they get a sharp shearing/cutting surface that can be both pointed and/or sharp like a knife edge. Protruding, sheared and/or upright metal bars consti tute a risk of personal injury during handling, or merely during various activi ties around them, if the ends of the bars are not encapsulated. This could be cuts and/or sticking injuries.
In order to protect persons against sticking injuries or cuts, various variants of plastic caps are currently used, which are mounted over the pointed and/or sharp end. Such caps can have multiple appearances with the common fea ture that they can encapsulate the pointed and/or sharp end. They should also ensure that they remain on the bars in the case of e.g. strong wind or merely while the work is being performed.
A common design is a cap with an inner straight and tubular portion, provided with some type of helical, longitudinal or transverse inner ribs, which can be resilient and fold aside, when the caps are mounted to the reinforcing bars, without the ribs coming loose. Thus, a cap is obtained that can be used for various dimensions of bars and at the same time, the resilient ribs lock the cap in place on the bar within the specific bar dimension range, for which the cap is dimensioned.
Another common appearance to handle various dimensions of bars can be that the cap is provided with a resilient waist. This appearance resembles an hourglass, and today it is one of the more widely used variants of caps, wherein the narrowest part of the waist defines the narrowest dimension of bars on which the cap locks to, and the inner diameter of the casing in its upper portion defines the largest bar dimension for which use of the cap is suitable. The body of the cap between the upper portion/cap and the lower portion/entrance for the reinforcing bar, is provided with longitudinal slits and is tapered from both directions to be able to be resilient and expand to differ ent extents depending on the bar dimension used. The upper portion/head of the cap can externally be either straight, somewhat rounded or be provided with a wider surface like a mushroom head. This means that the head has a larger outer diameter than the body diameter of the cap itself.
The object of such a wider head is substantially to distribute the force on a larger surface, or merely not aggravate puncture damage if a person trips over an upright reinforcing bar. In terms of shearing injuries, the size of the head has no significant importance. It is rather the shell thickness of the cap that is most important or merely the material of the cap. The material of the caps can vary, but they are usually made of polyethylene or polypropylene.
Moreover, metal discs can be placed or cast inside the caps to ensure that a reinforcing bar cannot cut through the plastic of the head. These caps are less common, but where they are available, it is often a consequence of local or regional requirement specifications and/or regulations.
Among the more widely used caps are those with a waist, the hourglass model. The waist is often placed in the middle of the cap and is outwardly resilient to be able to be useful for various dimensions of bars. They can be provided with a broadened head or just be terminated without broadening. A common feature for these and other caps is that the user usually grips the
head of the caps for application/attachment onto the bar. They grab it and press the cap over the bar by pushing on the head.
Reinforcing bars are often provided with external combs for increased bond ing and fixing in the concrete when the reinforcement is cast. A normal di mension range for the protective caps is that they must be able to cover rein forcing bars from 6 mm up to 16 mm. Including combs, this in practice means that the reinforcing bars are approx. 7-19 mm in their largest outer diameter. For this reason, the upper and terminating portion of a cap internally at the head should have a diameter of 19 mm, while it is advantageous if the nar rowest portion of the waist has a diameter of 6 mm or slightly less. In this manner, the fixation of the resilient waist around all dimensions in the range is ensured, and at the same time it is ensured that the cap can actually also enclose the largest bars in the dimension range.
This often means that protective caps with a waist can be difficult to mount on the largest dimensions of reinforcing bars. For the type of cap that is straight, and which has internal locking and folding ribs, the outer wall of the cap is completely circumferential and without openings. These caps have a rigid body without a resilient waist, and there is no risk that any reinforcing bar can protrude through the side wall at application. The body/side wall of caps with a resilient waist are instead slit, merely to be able to be resilient, but both types can be provided with a head that is larger than the diameter of the body of the cap or only with the same diameter as the body.
A traditional cap with a circumferential side wall without holes or slits can ei ther be pressed or hammered onto the reinforcing bar. For production rea sons, the inner locking and folding ribs of the cap are cast together with the inner top surface and inner circumferential side wall of the cap. In production terms, it is possible to circumvent this by making small through-going open ings in the head of the cap right above the inner ribs, but then the protective function of the cap is reduced or eliminated partially or fully. There is a risk
that small and narrow dimensions of reinforcing bars are pressed out through these openings in the head, which may lead to serious personal injury or even risks being fatal, if a person trips over them. Because the ribs of these caps are fixated internally against the head and at the same time against the inner side wall of the cap, the ribs do not fold aside as easily. Thus, a rela tively strong force is required for mounting them on the reinforcing bar diame ters in the upper range of the cap. Sometimes, it can be necessary to ham mer them down by some kind of tool.
A disadvantage of straight caps, regardless of the ribs, is the relatively rigid locking ribs. A solution to this problem is protective caps with a waist, where in the waist more easily springs aside, when it is applied on thicker dimen sions. However, protective caps with a waist also have disadvantages that may lead to an increased risk of personal injury in use compared with straight caps.
As the circumferential side wall is slit in the longitudinal direction of the cap, often 6 relatively long slits that are 2-3 mm wide for caps in the dimension range of 6-16 mm, there is a risk that narrow bars, e.g. 6 mm, can protrude through some of all these slits during mounting. Another disadvantage is that the waist can close when the cap is to be mounted on a reinforcing bar hav ing a thicker dimension, instead of being outwardly resilient, which means that a stronger force is necessary for mounting the cap. This can lead to in creased risk of shearing injuries, if one slips.
Therefore, there is a need for an improved protective cap.
DESCRIPTION OF THE INVENTION
An object of the invention is therefore to provide an improved protective cap for reinforcing bars. Another object of the invention is to provide a mounting
sleeve for a protective cap. Another object of the invention is to provide a method for mounting such a protective cap.
The solution to the problem according to the invention is described in the characteristic part of claim 1 for the protective cap, in claim 6 for the mount ing sleeve and in claim 9 for the method. The other claims contain advanta geous embodiments and further developments of the protective cap, the mounting sleeve and the method.
With a protective cap intended to be mounted on the end of a reinforcing bar, wherein the protective cap comprises an upper portion, a lower portion and an intermediary waist, where the cross section of the waist is smaller than the cross section of the upper portion and/or the lower portion, and where the upper portion comprises a protective surface, and where the protective cap is provided with slits that enable the waist to be outwardly resilient when the protective cap is mounted on a reinforcing bar, the object of the invention is solved in that the lower portion comprises an outwardly projecting lower bear ing surface arranged on a lower flange, where the inner diameter of the lower flange is equal to or larger than the diameter of the protective surface of the upper portion.
With this first embodiment of a protective cap, a protective cap is obtained, which can be mounted on reinforcing bars with various dimensions in a sim ple and more personally safe manner. The protective cap is provided with a protruding flange on its lower portion. By applying a force on the bearing sur face of the lower flange, the protective cap can be mounted in a simple and safe manner by the protective cap being pulled onto the reinforcing bar in stead of being pushed on it. The result is that the waist is stretched out and expands instead of being squeezed together and close, which it does if the cap is pressed/hammered onto the reinforcing bar. The protective cap can either be pulled on to the reinforcing bar by manual power by a worker pulling on the protective cap, or the protective cap can be mounted by means of a
mounting sleeve. The mounting sleeve is positioned against the lower bear ing surface, and a force is applied on the upper edge of the mounting sleeve, which drives the protective cap onto the reinforcing bar.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in more detail in the following, with reference to the embodiments shown in the accompanying drawings, in which:
Fig. 1 shows a first embodiment of a protective cap according to the inven tion,
Fig. 2 shows a second embodiment of a protective cap according to the invention,
Fig. 3 shows a third embodiment of a protective cap according to the inven tion, and
Fig. 4 shows a mounting sleeve according to the invention.
MODE OF EXECUTION OF THE INVENTION
The embodiments of the invention with further developments as described in the following should only be seen as examples and may in no way limit the scope of protection given by the patent claims. The invention is primarily in tended to be used on reinforcing bars, but is also suitable for all types of bars.
Fig. 1 shows a first example of a protective cap 1 according to the invention. The protective cap has an upper portion 2, a lower portion 3 as well as a waist 4 arranged between the upper portion and the lower portion. The upper portion is closed and is provided with an upper protective surface 6, which is intended to cover the end of the reinforcing bar, so that damages are avoid ed. The edges of the upper protective surface may be somewhat rounded. The interior side of the protective surface is intended to abut against the end
of the reinforcing bar, and can be provided with a metal disc to increase the strength and resistance of the upper protective surface. The protective cap is provided with slits 7 that enable the waist to be outwardly resilient when the protective cap is mounted on reinforcing bars in the upper range of the di mensions, for which the protective cap is intended. In one example, the pro tective cap is intended to be mounted on reinforcing bars in the dimension range of 6 to 16 mm.
The lower portion 3 of the protective cap 1 is provided with a protruding flange 5, which in the shown example extends around the entire circumfer ence 9 of the protective cap. The flange 5 is in the shown example arranged at the bottom of the lower portion, but it could also be arranged slightly higher on the lower portion, below the slits. The largest outer diameter of the lower portion 3, which is the same as the inner diameter of the flange 5, is equal to or larger than the largest outer diameter of the upper portion 2. The flange has a width of a number of mm, e.g. a width between 2 to 5 mm, so that a worker can get a good grip around the flange, when he mounts the protective cap by hand, or such that a lower bearing surface 8 is obtained for abutment against a mounting sleeve. The lower bearing surface 8 is perpendicular to a centre axis of the protective cap 1 , and is thus parallel to the upper protective surface 6. By applying a force on the flange, the protective cap can in a sim ple and safe manner and with a lower force than was previously possible be pulled onto the reinforcing bar, which increases the safety, as the protective cap does not risk to be damaged during mounting, as well as it saves time as the mounting of the protective cap proceeds faster.
Fig. 2 shows a second example of a protective cap. In this example, the flange is discontinued at some points, so that a number of edge portions 10 are formed. The flange still gives the worker a good grip on the protective cap 1 and the protective cap 1 can still be mounted with a mounting sleeve, but the edge portions 10 saves a few percentages of material.
Fig. 3 shows yet another example of a protective cap. In this example, the upper protective surface 6 is enlarged, which can offer increased personal protection. To enable mounting with a mounting sleeve 20, the edge of the upper protective surface 6 is provided with recesses 11 , which are intended to cooperate with inner flanges in a mounting sleeve. The inner flanges can thereby abut against the lower bearing surface 8 of the flange 5 without the diameter of the lower flange having to be larger than the diameter of the up per protective surface.
Fig. 4 shows an example of a mounting sleeve 20. The mounting sleeve is provided with an upper edge 21 and a lower edge 22. The upper edge 21 is in the shown example closed to increase the contact surface when the pro tective sleeve is mounted with e.g. a hammer. The upper edge 21 is here provided with an enlarged head 23 with a somewhat rounded shape and a diameter that is larger than the body of the mounting sleeve. This will provide a larger contact surface when a worker applies the protective cap with the hand. The mounting sleeve is advantageously manufactured in plastic or al uminium and can e.g. be moulded or cast. It is also possible to extrude the mounting sleeve. In such cases, the mounting sleeve will be symmetrical, and the upper edge 21 and the lower edge 22 will be identical. The mounting sleeve is here plain on the inside, so that it fits protective caps with a lower flange 5 or edge portions 10 that have a larger diameter than the head of the protective cap.
In one example, the mounting sleeve 20 may be provided with inner ribs, which are intended to cooperate with recesses in a protective cap with an enlarged upper protective surface. The inner ribs will bear on the lower bear ing surface on protective caps with a flange that runs around the entire pro tective casing. With the proper orientation, the inner ribs will also be able to bear on the edge portions 10.
The invention should not be considered to be limited to the embodiments de scribed, a number of further variants and modifications are possible within the framework of the following patent claims.
REFERENCE NUMERALS
1 : Protective cap
2: Upper portion
3: Lower portion
4: Waist
5: Lower flange
6: Upper protective surface
7: Slit
8: Lower bearing surface
9: Circumference
10: Edge portion
11 : Recess
20: Mounting sleeve 21: Upper edge
22: Lower edge
23: Head
Claims
1. A protective cap (1) intended to be mounted on the end of a reinforc ing bar, wherein the protective cap (1) comprises an upper portion (2), a lower portion (3) and an intermediate waist (4), where the cross sec tion of the waist is smaller than the cross section of the upper portion (2) and/or the lower portion (3), where the upper portion (2) comprises a protective surface (6), and where the protective cap (1) is provided with slits (7) that enable the waist to be outwardly resilient when the protective cap is mounted on a reinforcing bar, characterized in that the lower portion (3) comprises an outwardly projecting lower bearing surface (8) arranged on a lower flange (5), where the inner diameter of the lower flange (5) is equal to or larger than the diameter of the pro tective surface (6) of the upper portion (2).
2. A protective cap according to claim 1 , characterized in that the lower bearing surface (8) is continuous around the circumference (9) of the lower portion (3).
3. A protective cap according to claim 1 , characterized in that the lower bearing surface (8) consists of a number of partially circular edge por- tions (10) arranged around the circumference (9) of the lower portion
(3).
4. A protective cap according to any one of claims 1 to 3, characterized in that the lower bearing surface (8) is perpendicular to a centre axis of the protective cap (1 ).
5. A protective cap according to any of claims 1 to 4, characterized in that the protective surface (6) of the upper portion (2) comprises a number of recesses (11 ).
6. A mounting sleeve, characterized in that the mounting sleeve (20) is circular and comprises a lower edge (22) intended to bear against and
cooperate with the lower bearing surface (8) of a protective cap (1) according to any one of claims 1 - 5.
7. A mounting sleeve according to claim 6, characterized in that the mounting sleeve comprises a plurality of inner ribs adapted to cooper- ate with recesses (11) in the upper protective surface (6) of a protec tive cap according to claim 5.
8. A mounting sleeve according to claim 6 or 7, characterized in that an upper edge (21) of the mounting sleeve (20) is provided with an en larged head (23).
9. Method for mounting a protective cap on a reinforcement bar, where the protective cap is provided with an upper protective surface, a resil ient waist and a lower flange extending outwardly from a lower portion of the protective cap, comprising the following steps:
- placing the protective cap on an end of the reinforcement bar, such that the lower portion of the protective cap abuts an end of the reinforcement bar,
- applying a force on the lower flange of the protective cap such that the waist widens and until an inner surface of the upper protective surface of the protective cap bears on an end surface of the reinforcement bar.
10. Method according to claim 9, characterized in that the force applied on the flange is applied by a mounting sleeve according to any of claims 6 to 8 mounted over the protective cap such that a lower edge surface of the mounting sleeve bears on the lower flange of the pro- tective cap, and where the force is applied on an upper surface of the mounting sleeve.
11. Method according to claim 9, characterized in that the force applied on the flange is applied by a hand of a worker.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21793022.1A EP4139534A4 (en) | 2020-04-24 | 2021-04-22 | Protective cap |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE2050471A SE544282C2 (en) | 2020-04-24 | 2020-04-24 | Protective sleeve for rebar comprising a protruding support surface arranged by a flange |
SE2050471-8 | 2020-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021215990A1 true WO2021215990A1 (en) | 2021-10-28 |
Family
ID=78269720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2021/050368 WO2021215990A1 (en) | 2020-04-24 | 2021-04-22 | Protective cap |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4139534A4 (en) |
SE (1) | SE544282C2 (en) |
WO (1) | WO2021215990A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2459763A1 (en) * | 1979-06-27 | 1981-01-16 | Laroche Jean Pierre | Safety cap for concrete reinforcing bars - has closed end with foam rubber and throat to hold cap in position on bar |
AU657696B2 (en) * | 1990-09-10 | 1995-03-23 | Underwood Companies Holdings Pty Ltd | Construction site safety |
US20050120666A1 (en) * | 2003-12-05 | 2005-06-09 | Alyea Mark D. | Concrete anchor float |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5469679A (en) * | 1994-09-16 | 1995-11-28 | Minnesota Mining And Manufacturing Company | Protective cover with locking collar and installation tool |
US8002508B2 (en) * | 2008-09-26 | 2011-08-23 | Griptight Bolt Cover Co. | Protective cover for fasteners |
ES1070711Y (en) * | 2009-04-17 | 2010-01-18 | Valls Jose Carbonell | ANTI-IMPACT CONSTRUCTION ELEMENT |
-
2020
- 2020-04-24 SE SE2050471A patent/SE544282C2/en unknown
-
2021
- 2021-04-22 WO PCT/SE2021/050368 patent/WO2021215990A1/en unknown
- 2021-04-22 EP EP21793022.1A patent/EP4139534A4/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2459763A1 (en) * | 1979-06-27 | 1981-01-16 | Laroche Jean Pierre | Safety cap for concrete reinforcing bars - has closed end with foam rubber and throat to hold cap in position on bar |
AU657696B2 (en) * | 1990-09-10 | 1995-03-23 | Underwood Companies Holdings Pty Ltd | Construction site safety |
US20050120666A1 (en) * | 2003-12-05 | 2005-06-09 | Alyea Mark D. | Concrete anchor float |
Non-Patent Citations (3)
Title |
---|
ANONYMOUS: "Capuchon de protection des aciers fers ø 6 à 16 mm (Sac de 250 pièces) ", AMAZON.FR, 1 January 2016 (2016-01-01), XP055867806, Retrieved from the Internet <URL:https://www.amazon.fr/Capuchon-protection-aciers-fers-pièces/dp/B01KQ96CD8> [retrieved on 20211201] * |
ANONYMOUS: "CAPUCHONS DE PROTECTION DES ACIERS", COFRASUD, 1 January 2016 (2016-01-01), XP055867808, Retrieved from the Internet <URL:https://www.cofrasud.com/fichiers/catalogue/33582-FT1.pdf> [retrieved on 20211201] * |
See also references of EP4139534A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP4139534A1 (en) | 2023-03-01 |
SE2050471A1 (en) | 2021-10-25 |
EP4139534A4 (en) | 2024-04-17 |
SE544282C2 (en) | 2022-03-22 |
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