This invention relates to a barrier. More particularly, the invention relates to a temporary barrier of the type to be used on or near roadways and which is manufactured at least partially from a moulded plastics material.
Temporary barriers are typically constructed of light-weight material, such as blow-moulded plastics material, so that they can be handled by a single worker. The mass of a temporary barrier is often less than 25 kg to comply with load handling restrictions for single workers. If necessary, increased stability can be imparted to a temporary barrier by adding weight in the form of sand bags, support blocks, or similar.
Commonly, temporary barriers comprise end-to-end connectors in the form of a hook on one end of the barrier and a ring at the other end of the barrier, such that multiple temporary barriers can be hooked together in end-to-end fashion to provide a length of temporary fencing.
The end-to-end connector elements are integral with the temporary barrier which facilitates moulding and ensures the connector elements are provided together with a barrier panel.
The present applicant pioneered a temporary barrier comprising as part of an end-to-end connector arrangement a relatively long engaging element to engage in elongate slots of much wider cross-section than that of the engaging element. The wider cross section results in a loose engagement allowing the long engaging element to tilt relative to the elongate slot while it is engaged in it, which in turn allows a relatively secure end-to-end connection of adjacent barriers to be maintained on uneven terrain e.g. from street level to a relatively higher pavement level.
The present invention has been devised to further improve or facilitate the use of end-to-end connection arrangements between temporary barriers.
According to a first aspect, the present invention provides a temporary barrier as defined in claim 1, comprising a barrier panel manufactured from a moulded plastics material. The barrier panel comprises an end-to-end connector arrangement. The barrier panel is moulded with at least one mounting location for locating a connector element of the end-to-end connector arrangement, allowing the connector element to be affixed at the mounting location, to extend from the barrier panel to be able to connect in end-to-end fashion to an adjacent temporary barrier to be provided.
The temporary barrier may be a type of barrier supported on two feet. The feet may be swivelable from a retracted configuration in which they are aligned with the plane of the panel to an extended configuration in which they extend sideways from the plane of the panel to provide stability. The temporary barrier may be generally flat, or transformable into a flat configuration, e.g. by using the aforementioned swivelable feet, to reduce the stack height of multiple stacked panels.
It will be understood that the connector element, since it is affixed to the mounting surface, is a separate component to the barrier panel, and in particular it may be manufactured without a need for it to be integrally moulded with the barrier panel. Since the at least one connector element is a separate structure to the barrier panel, this facilitates replacing the connector element without having to replace an entire barrier panel. The present arrangement provides that in the event of damage to the connector element, only the damaged connector element will need to be replaced. This is advantageous since it avoids a need for replacing an entire barrier panel if only a connector element needs to be replaced.
The mounting location identifies a surface to which a connector element can be affixed on the barrier panel, for instance at or near a lateral end of the barrier panel. It will be understood that the connector element is provided with a panel-engaging portion and a connector portion. E.g., the panel-engaging portion may be provided in the form of an abutment surface to be seated on or in the mounting location. The connector portion may be a protrusion such as a hook, or a receptacle such as a ring, carried on the panel-engaging portion.
In some embodiments, the mounting location comprises a fixture-receiving configuration and the connector element comprises an attachment configuration, wherein the fixture-receiving configuration corresponds to the attachment configuration such that their alignment defines a predetermined orientation of the connector element relative to the barrier panel.
The predetermined orientation achieves that the connector extends in a predefined direction from the barrier panel when it is affixed to the mounting location. Thereby, the at least one connector element may be rotationally locked in relation to the barrier panel, and/or locked in a vertical and/or horizontal position. In particular, the connector element may be affixed such that a worker can lift the temporary barrier to connect it to an adjacent barrier, without having to consider that the connector might slide or rotate away. As such, by way of fixing the connector in position, the temporary barrier can be handled in a working environment just like an unitary barrier panel, e.g. a barrier panel with integrally moulded connectors. Likewise, if the panel is stacked for storage or transportation, the connector elements should remain fixed to avoid that they rotate or slide in a position, e.g. sticking out sideways, away from the panel plane, in which they inhibit dense stacking or would be more prone to damage.
In a simple configuration, the connector element is affixed to the mounting location, e.g. a planar surface of the panel-engaging portion abutting a planar surface of the mounting location, using one or more bolts to fix the connector element rotationally and translationally on the barrier panel. However, such a configuration may require a thread of a bolt to grip the panel material, and may require a tightening of the bolts which may place undesirable strain on some types of barrier panel, for instance panels of blow moulded construction with relatively thin and therefore brittle walls.
In some embodiments, the fixture-receiving configuration is integral with the mounting location.
In some embodiments, the attachment configuration is integral with the connector element.
Integral mounting locations and/or attachment configurations avoid the need for alignment of the fixture-receiving configuration with the mounting location, or of the attachment configuration with the connector element, respectively, during assembly, contrary to what would be the case for separate components.
In some embodiments, the fixture-receiving configuration and/or the attachment configuration comprises holes.
This avoids the need to permanently alter or damage the barrier panel and/or the connector element to allow it to receive a fixture. Particularly blow-moulded barrier panels can be of hard, thin-walled plastics material that is relatively brittle and therefore not well suited for drilling holes into the panel without causing damage. The fixture-receiving elements may be aligned with corresponding attachment elements on the connector element. For instance, the connector element and the barrier panel may comprise holes that are aligned to allow a bolt to be received through the connector element and through the barrier panel, to be secured with a corresponding nut.
By providing fixture-receiving holes, a connector element can be removably affixed to the mounting surface, e.g. using bolts, washers, and nuts, without damage to the barrier panel. The localised loads onto the barrier panel material can be further reduced by using washers or contact surfaces of the fixture-receiving configuration and attachment configuration that avoid a need for a fixture to come into direct contact with the barrier panel material.
Likewise, the connector element may comprise, as attachment configuration, a thread that can be engaged by a bolt fed through a hole of the fixture-receiving configuration of the panel.
In some embodiments, the fixture-receiving configuration and the attachment configuration comprise corresponding engagement features.
In some embodiments, the connector element is made from a different material than the barrier panel. The connector element may be made from metal. The connector element may be made from the same material as the barrier panel. The at least one connector may be manufactured from a plastics material, particularly moulded plastics material. Additionally, or alternatively, the at least one connector element may be manufactured from, or reinforced with, a stronger material than the barrier panel, such as fibre reinforcement.
Manufacturing the at least one connector element from, or reinforcing the at least one connector element with, a stronger material than the barrier panel allows the connector element to be of a smaller size when compared to another connector element with the same failure load but manufactured from the same material as the barrier panel. A smaller and more compact connector element is advantageous since it allows for a smaller gap between connected barriers. Further, a smaller and more compact connector element is less likely to get accidentally damaged when handling the barrier. As can be imagined, temporary barriers are used at roadwork and construction sites and be subject to robust handling. Particularly as end-to-end connectors protrude from the general body of a barrier panel, they are more exposed and more susceptible to damage. A smaller connector element may also have a smaller area of attachment to a barrier panel which is advantageous since it provides more design freedom for positioning the mounting location on the barrier panel.
On the other hand, a connector element may have to be made from a relatively large size to remain compatible with existing barrier systems. For instance, the hook of an end-to-end connector may protrude laterally, in the extension of the plane of the barrier panel, about 10-15 cm from the barrier panel body and have a length, vertically, of about 25-30 cm. However, using a stronger material, the hook may be made thinner, with a smaller cross-section than would otherwise be the case.
In some embodiments, the barrier panel and/or the connector element has a Shore A hardness of no more than 95, 90, 85, 80, 75, 70, 65, or 60. The barrier panel and/or the connector element may have a Shore A hardness of at least 60, 65, 70, 75, or 80. Exemplary materials to provide a moulded panel of this degree of Shore A hardness are thermoplastics such as low density polyethylene, which have a rubbery consistency. To provide illustrative values, a Shore A hardness of 80 would be corresponding to hard rubber, whereas a Shore A hardness of 60 would be relatively floppy, such as rubber material used in a door seal.
In some embodiments, the barrier panel is made of a material with a Young's modulus (measured in GPa) of no more than 4.5, 4, 3.5, 3, 2.5, 2, or 1.5 GPa. In some embodiments, the barrier panel is made of a material with a Young's modulus of no less than 0.05, 0.1, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, or 6 GPa.
In some embodiments, a connector is made of a material with a Young's modulus of no more than 4.5, 4, 3.5, 3, 2.5, 2, or 1.5 GPa. In some embodiments, a connector is made of a material with a Young's modulus of no less than 0.05, 0.01, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, or 6 GPa. In particular plastics material may be fibre reinforced, having a Young's modulus of no less than 10, 20, 30, 40 or 50 GPa. A connector may be made from metal.
In some embodiments, the barrier panel and the connector element have the same rigidity. In some embodiments, the barrier panel is more rigid than a connector element.
In some embodiments, a connector element is more rigid that the barrier panel. In some embodiments, one connector element is more rigid than the barrier panel and another connector element is less rigid than the barrier panel. As such, the connector element may be more flexible than the barrier panel. This may be appropriate for relatively larger connectors. The connector element may be less flexible than the barrier panel. This may be appropriate for relatively smaller connectors. The barrier panel may comprise at least two connector elements, and one connector element may be less flexible than the barrier panel and another connector element may be more flexible than the barrier panel. For instance, a hook-type connector element may be more rigid than the barrier panel and a corresponding ring-type connector element shaped to receive the hook may be more flexible than the barrier panel, or vice versa. The connector elements may have the same rigidity.
In some embodiments, the temporary barrier panel is manufactured via a blow moulding process, an injection moulding process, or a compression moulding process.
In some embodiments, the at least one connector element may be affixed using either screws, rivets, bolts, pins, via a tongue-and-groove engagement, relying on friction fit or a snap-fit arrangement, or a combination of two or more thereof.
In some embodiments, the connector element is affixable to the barrier panel via the fixture-receiving configuration and the attachment configuration when they are aligned.
More generally, the connector element may be affixed in a manner permitting its removal without damage to the barrier panel. This allows each connector element to be removed without otherwise affecting the structure of the barrier panel, and to be replaced with a connector element of the same configuration or a different configuration. This allows broken connector elements to be easily and quickly replaced. Likewise, this allows connector elements to be repeatedly detached or attached. The use of replaceable connector elements also enhances the modularity of the temporary barrier, because the same panel mould can be used to attach different connector systems.
The temporary barrier may comprise at least two connector elements. The at least two connector elements may include at least one first connector element and at least one second connector element. The at least one first connector element may have a different configuration to the at least one second connector element. The at least one first connector element may comprise a receiving portion and the at least one second connector element may comprise a corresponding protruding portion dimensioned to engage in a receiving portion of same dimensions of an adjacent temporary barrier. The protruding portion may be hook-shaped and the receiving portion may be ring-shaped.
The temporary barrier may comprise at least two mounting locations. At least one mounting location may be comprised at or near a first lateral end of the barrier panel. At least one mounting location may be comprised at or near a second lateral end of the barrier panel. The at least one mounting location at the first lateral end of the barrier panel may be paired with at least one mounting location at the second lateral end of the barrier panel, such that the at least one pair of mounting locations are located at the same height from a base of the barrier panel.
The mounting location may be constituted by one or more mounting surfaces. The mounting surface may be planar. The mounting surface may either be parallel or perpendicular to a plane of the barrier panel.
Turning to the connector element, the panel-engaging portion may comprise at least one planar surface corresponding to the planar mounting surface when affixed to it. The panel-engaging portion may comprise two or more planar surfaces configured to lie adjacent at least two planar mounting surfaces of the mounting location when affixed to it.
The mounting surface and/or the panel-engaging portion may comprise corresponding surface patterns, e.g. ridges, protrusions and/or corresponding recesses, to improve the surface-to-surface engagement between the connector element and the mounting location.
The mounting surface may be curved. The panel-engaging portion may comprise at least one curved surface configured to at least partially conform to and at least partially surround the curved mounting surface when affixed to the curved mounting surface.
In some embodiments, the at least one mounting location is recessed into an outer surface of the barrier panel. A depth of the at least one recessed mounting location may be chosen to be no less than a thickness of a mounting plate of the panel-engaging portion of the connector element.
By choosing a thickness of a mounting plate of the connector element to be equal to, or less than a depth of the at least one recessed mounting location, the connector element may be configured such that an outer surface of the mounting plate is flush with, or not protruding from, the outer surface of the barrier panel once affixed. This is advantageous since it reduces the likelihood that the affixing portion of the connector element will be accidentally damaged. In particular, the mounting location may be recessed in the plane of the barrier panel, such that multiple barrier panels can be stacked without interference by the mounting location if a mounting plate is attached to it. This can be achieved by providing connector elements that are not wider, in a direction perpendicular to the plane of the barrier panel, than the barrier panel.
Alternatively, the connector element may be configured such that some portions of the mounting plate are higher than the recessed mounting location, but at least an edge of its outer surface is flush with, or not protruding from, the outer surface of the barrier panel, such that there is no protruding step. The stackability may provided even if a mounting plate of a connector element protrudes from the plane of a barrier panel, if the corresponding opposite side of the barrier panel is provided with a recess. In that case, the protruding mounting plate of the connector on a first barrier panel may extend into the recess provided by the mounting location of a second barrier panel.
According to a second aspect, the present invention provides a temporary barrier system comprising two or more of the aforementioned temporary barriers. The temporary barriers are arranged such that at least one connector element of each barrier is connected to a connector element of an adjacent barrier.
Embodiments of the invention will now be described by way of example and with reference to the accompanying Figures, in which:
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In
The barrier panel 11 may be manufactured from a moulded plastics material such as, for example, acrylonitrile butadiene styrene (ABS), polyethylene, polycarbonate, polyamide, or polypropylene. The barrier panel 11 may be manufactured from either a virgin plastic material or a recycled plastic material. The barrier panel 11 may be manufactured via any process known in the art such as, for example, blow moulding, injection moulding, or compression moulding.
The barrier panel 11 may include one or more strengthening members to improve the panel's strength and/or rigidity. The strengthening members may be manufactured from a different material to the barrier panel such as, for example, a stronger and/or more rigid plastics material, steel, aluminium or wood, or a fibre-reinforced composite material. The strengthening members may lie adjacent: the top rail 18, the base 19, the first lateral end 16, the second lateral end 17, one or more openings 15, or a combination of said locations.
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In
In some embodiments, the connector element 14 is manufactured from a different material to the barrier panel 11. For example, the connector element 14 may be manufactured from a different moulded plastics material to the barrier panel 11. Alternatively, the connector element 14 may be manufactured from a non-plastics material such as, for example, steel, aluminium, wood or a fibre-reinforced composite. The connector element 14 may be manufactured from, or reinforced with, a stronger material than the barrier panel 11. By stronger, it is meant that the connector element may be harder, more durable, more resilient and/or more rigid than the barrier panel.
In
In some embodiments, the connector element 14 is rotationally locked in relation to the barrier panel 11. In other embodiments, the connector element 14 is vertically fixed in position to prevent sliding up and down the barrier and allowed to rotate in relation to the barrier panel 11 about at least one axis of rotation. The locked, or fixed, engagement may be achieved by providing corresponding engagement features in the form of an arrangement of holes as attachment configuration of the connector element 14 and in the form of corresponding holes as fixture-receiving configuration of the outing surface 13.
In
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The temporary barrier 20 shown in
In some embodiments, the barrier panel 11 exhibits symmetry such that the mounting panels are on the same height. This facilitates manufacture if the temporary barrier can be assembled without regard to the orientation of the barrier panel. The barrier panel may comprise multiple mounting locations, e.g. a total of four mounting locations, or six mounting locations, near the base, near the centre, and near the top, on each of the left and right end of the barrier panel, such that the barrier panel is correctly oriented for assembly regardless of which edge is facing up or to a particular side. It will be understood that the barrier panel may have more mounting locations than connectors. Each mounting location may allow a connector to be affixed to it.
Referring to
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One or more of the connector elements may extend in the extension of the plane of the panel, laterally beyond the footprint of the base, sufficiently to allow two adjacent temporary barriers to be connected at a right angle, such that four panels can be connected to form a square.
While the barrier panel has been depicted as fence-type panel with slots, variants of the barrier panel may be continuously solid to provide protection against dust or debris.
Number | Date | Country | Kind |
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1904885.9 | Apr 2019 | GB | national |