EP2591690B1

EP2591690B1 - Safety Helmet

Info

Publication number: EP2591690B1
Application number: EP13154549.3A
Authority: EP
Inventors: Jacques Forrest; Gary Rose; Christopher Garcin; Peter Anns
Original assignee: Centurion Safety Products Ltd
Current assignee: Centurion Safety Products Ltd
Priority date: 2007-10-19
Filing date: 2008-10-17
Publication date: 2014-12-17
Anticipated expiration: 2028-10-17
Also published as: EP2399473A2; EP2207446B1; ATE536752T1; EP2591690A3; EP2207446A1; WO2009050471A1; EP2591690A2; EP2399473A3

Abstract

A safety helmet (1) having a fitment (150) for a fitment clip (120, 140) for fitting a helmet accessory configured to receive either a first clip (120) having: two downwardly-depending resilient arms (121); a clip portion at the end of each arm; a downwardly-depending tab (122); a support section to engage a surface of the helmet; and an outer surface for fitting an accessory thereto; or a second clip (140), having: a first tab (141); and a resilient projecting second tab (142); the fitment (150) comprising: a slot (151) to accommodate a tab (122) from the first clip (120) or a tab (141) from said second clip (140); a through aperture (153) on an outer surface to accommodate a projecting tab (142) of a second clip (142) and thereby fixing the fitment clip (140) in position; and an outer surface adjacent an edge of the helmet such that, when a first clip (120) is located in said fitment (150), clip portions of the arms (121)of the first clip (120) pass under the helmet (1) to hold the fitment clip (120) in position.

Description

Field of the Invention

The present invention relates to a safety helmet.

Background to the Invention

Safety helmets, also referred to as hardhats are well known and widely used in a diverse range of industries. The helmets are for protection to the wearer's head to protect against falling objects and also against obstacles which are located at head height and which can easily cause accidental damage as persons move about a workplace. The helmets can in addition be employed as a support means for further safety elements. For example, provision is normally provided, often as part of the helmet's structure to attach ear defenders, reflective markers, identification labels etc. It is important when making such provision that the further safety elements can be easily replaced if required, for example for worn or damaged elements.
The material from which the helmets are formed must first and foremost therefore be impact resistant. However, they must allow the helmet to be worn over prolonged periods without causing undue discomfort to the wearer. This latter criterion not only applies to the physical aspects of the helmet rubbing against the person's scalp, but can also apply to less obvious considerations. For example, unless ventilation is included, the helmet can trap heat and moisture in the volume above the wearer's head.
A further problem with prior art helmets lies with their assembly. Typically, a helmet comprises a hard plastic shell which ultimately serves as the protecting element of the helmet. A number of tapes, of differing length need to be secured within the inside of the helmet. Said tapes are secured in place by means of an adhesive, ultrasonic welding, sewing or a support component which is secured to the shell through specially designed fitments, fixing the tapes between the support component and the shell. The tapes form thereby a flexible web which engages the wearer's head, keeping the helmet in position and also providing a cushioning effect if the helmet is struck.
Assembly of the completed helmet from the components can therefore be time consuming. Moreover, the assembly is normally done by specialists on site at the place of manufacture. The assembled helmets are therefore not easily transported in a way which maximises space as the helmets do not stack well and include empty volume.
It is also of advantage for helmets to be available which enable secondary fixing mechanisms to be included, allowing additional features to be incorporated into a helmet. Such additional features include reflectors, pencil holders and the like. For prior art helmets the flexibility to include these secondary fixing mechanisms is limited due to the problems they would cause during the moulding step.
It is an object of the present invention to provide an improved safety helmet.
US Patent Application 2004/0199982 describes a mechanism for securing a transparent eye protector to a helmet having a recess at either side. The mechanism includes brackets with a snapping members to releasably secure the mechanism to a helmet.
US Patent 4,442,551 describes an adapter for adapting an accessory fitting for various size pockets at the margin of protective helmets.

Summary of the Invention

According to the invention there is provided a safety helmet as defined in claim 1.

Brief Description of the Drawings

The invention will now be described with reference to the accompanying drawings which show by way of example only one embodiment of a safety helmet. In the drawings:

Figure 1 is a front view of a helmet;
Figure 2 is a sectional view along A-A of Figure 1;
Figure 3 is a top view of a helmet;
Figure 4 is a sectional view along B-B of the Figure 3;
Figure 5 is a rear perspective view of a helmet;
Figures 6,7 and 8 show an exploded view of the side, front and perspective of the assembly of a helmet;
Figure 9 is a perspective view of a completed helmet;
Figures 10 and 11 illustrate a second example of a peg;
Figures 12-15 illustrate fitment means for accessories; and
Figures 16-24 illustrate accessories usable on the helmet.

Detailed Description of the Invention

Referring initially to Figure 1, the helmet 1 can be seen to include a number of features which are common to conventionally made helmets. The shell 10 of the helmet 1 is formed of a rigid impact resistant and non-electrically conducting plastics material. The frontpiece 11 or badging area is flat and can be used to identify the wearer or the company represented, by affixing a label thereto. A peak 12, below the frontpiece 11 acts to prevent injury to the wearer's face and eyes from material falling from above.
In order to alleviate the heat problem indicated above, the helmet 1 includes a ventilation means. Referring to Figures 2 to 4 a ventilation ridge 13 runs from a front portion of the top of the helmet 1 towards a rearward exterior opening into the inside of the helmet 1 at aperture 14. The ridge 13 defines an internal channel 14a running from the front towards the rear of the helmet 1. Said channel, opening to the outside at the aperture 14 is larger in width at the forward interior end than at the rearward end, and is also larger than the aperture 14. The channel 14a therefore connects the interior volume at the top of the helmet 1 with the outside.
The aperture 14 is orientated downwardly to minimise ingress of material through the aperture 14. Heat and moisture which would otherwise accumulate above the wearer's head are thereby removed. The aperture 14 together with the narrowing of the channel 14a towards that aperture 14 act to produce a slight lowering of pressure which draws air from the interior volume of the helmet and aids the cooling process. An additional optional exterior channel 16 is included to aid run off of moisture from the helmet 1. If required, a stopper or bung can be employed to close the hole for example, to minimise the risks where there is a danger of hot materials splashing in to the aperture.
Within prior art helmets a supporting structure - often referred to as a cradle - is fitted inside the shell 10 and acts as a support for a number of tapes which span the internal volume of the shell 10. The tapes combine together to form a web, which web of tapes acts to support the helmet when in use and also to absorb forces impacting the helmet.
Prior to insertion into the helmet shell the tapes, usually three in number, are sewn together at a common point, approximately central to each tape.
Special attachment means are then used to fix the free ends of the tapes to a cradle. The cradle and tape assembly is fixed into the helmet shell, rendering the helmet ready for use.
Due to the difficult nature of the above assembly method, these steps are typically done prior to dispatch of the helmets from a specialist manufacturing site. The result of this is firstly increased manufacturing times and secondly higher transport costs due to the poor stackability of completed helmets.
A method of assembly of a helmet described herein facilitates the processes involved. The method also allows for all the tapes to be used to be of the same length, reducing assembly time and low manufacturing costs, but does not form part of the claimed invention.
In Figures 6-8, it can be seen that the helmet shell 60 is formed from two separate sections 61,62. The upper section 61 includes the ventilation tunnel 14a indicated above, although this feature is not essential to the working of the method of assembly.
The lower section 62 includes a number of features which in combination with complementary features on the upper section 61 enable the method to function. Firstly, at intervals around the lower section 62, tape securing elements 63 are located. Each securing element 63 has an outwardly facing planar surface 64. Two pegs 65 project upwardly from the securing element 63 which engage the end regions of a tape 66. To facilitate said engagement, holes (not illustrated) corresponding to the diameter and separation of the pegs 65 can be formed in the tape 66.
In the example shown the lower section 61 has six securing elements 63, enabling three tapes 66 to be fitted combining together to form a supporting web inside the helmet 60. By suitable location of the securing elements 63, the distance between diametrically opposed elements 63 can be made the same, enabling therefore only one length of tape 66 to be used. Such standardisation reduces production and assembly costs.
In order to secure the upper and lower sections 61,62 to one another, a push-fit fixing mechanism is provided. Male fixing tabs are supplied on the lower portion 62. Said tabs are formed of a plastics material and are partially resilient. The corresponding female elements on the upper section 61 engage the male tabs, and vice versa, to provide a firm fitment. The resilient nature of the tabs enables the two sections 61,62 to be separated only with difficulty. The temptation for a wearer to carry out repairs if one section is damaged is therefore reduced: such repairs often being dangerous as, following an impact, weakening of the shell can occur which is not visible, but renders the helmet unsafe with regard to its being used further. The one-way fit also provides the helmet as a coherent unit comparable to conventional helmets.
To assist fitment together of the two sections, the upper section 61 has a double skin 67,68 which both guides the lower section 62 into position and also subsequently strengthens the completed unit.
In order to assemble the completed helmet therefore, an upper section 61 is selected and positioned such that the other elements can be added thereto. A lower section 62 is selected along with three tapes 66 of equal length. The pegs 65 are located within the holes at the end of each tape 66, with the tapes 66 thereby secured to the securing elements 63 on opposing sides of the lower section 61.
The upper and lower sections 61,62 are then brought together. In so doing the securing elements 63 pass between the walls of the double skins 67,68 carrying the tape 66. The free ends of a tape 66 are thereby sandwiched between the planar face 64 of a securing element 63 and the outer skin 68. Once the two sections 61,62 are clicked into their final position, the tapes 66 are held firmly in position to form a supporting web. The helmet 60 is then ready for use.
An additional example of a peg is shown in Figures 10 and 11. The pegs 110 have, in cross-section, and arrow-head configuration. Once the peg 110 has passed through the tape 66 therefore the peg 110 is difficult to remove and almost impossible without irreparably damaging the tape 66.
A further feature displayed by the helmet 60 is the neck guard 70, which is included as an extension of the lower section 62.
In an alternative reference example, not illustrated, a supporting web can be used in place of the tapes. The web includes tabs to enable the web to be secured in position. Alternatively, a plastic webbing or cradle can be used.
The helmet of the present invention is defined to be used in conjunction with other safety apparatus. For example, fitments means to accommodate the use of ear defenders is included. The use of ear defenders is well known and different fitments means have been developed and in many regions become standard. For example standard fitments are in use in the United Kingdom with different standards in Continental Europe. The helmet according to the present invention is capable of use with both fitments. Additionally, visor carriers and visors, brow guards and weld shields.
The fitment means are exemplified in Figures 12-15. In Figure 12, a fitment clip 120 is shown typical for a standard UK fitment. The clip 120 has two downwardly depending arms 121. The arms 121 have limited resilience enabling the arms 121 to bend outwardly from the plane of the clip 120 if a force is applied. Once the force is removed however, the arms 121 revert to the configuration shown. The clip 120 further includes a tab 122, also depending downwardly to engage a fitment on the helmet 1.
Typically within the UK, the clip 120 engages a fitment 130, on the side of a helmet, shown in Figure 13. The tab 122 passes into the slot 131 in the fitment. Moreover, each arm 121 passes over the surfaces 132, bending due to the force exerted by the surface 132, until the clip portion 123 of the arm passes over the end of the surface 132. Once the clip portion 123 passes over the end, the arm 121 reverts to its normal position and the clip portion passes under the helmet 1 to hold the fitment clip 120 in position, with the support section 124 against the outer surface of the helmet 1. An accessory can then be fitted to the outer surface 125 of the fitment clip 120.
The fitment 130 is however unsuitable for use with the continents European clip 140 shown in Figure 14. A modified fitment 150, shown in Figure 15 can therefore be included on a helmet 1, which modified fitment can accommodate both types of clip 120 and 140. The fitment 150 is similar to that shown in Figure 13. The slot 151 is firstly broader to allow passage of the tab 141. Moreover the outer surface 152 of this slot 151 includes a through aperture 153 to receive the projecting tab 142.
As the tab 141 is therefore pushed into the slot 151, the resilient material from which the tab 142 is formed allows the tab 142 to bend inwardly. Downward pressure is continued until the tab 142 engages and enters the aperture 153. The tab 142 then springs back to its normal configuration pushing the tab 142 into the aperture 153 and fixing the fitment 150 in position.
In addition to the above cited advantages, the use of a two part construction enables fixing mechanisms to be readily incorporated enabling secondary accessories such as reflectors, pencil holders and the like to be included as part of the finished product. The fixing mechanisms are typically slots within the helmet, which slots do not affect the integrity of the helmet.
Examples of this are shown in Figures 16-24. In Figure 16 and 17, upper slots 160 can be seen on the rear portion 161, together with a lower slot 162 to receive the particular accessories, illustrated in Figures 16 and 17 by a reflector 163. The reflector 163 includes hooks 164 insertable into the slots 160, 162 to secure the reflector 163 in position.
In the following Figures, the same principle can be seen to serve to support other accessories. So in Figures 18-24 are shown a goggle strapholder 165, lamp cable holder 166, an Radio Frequency (RF) card holder 167, a centrally mounted card holder 168, a neck cover 169, an air supply feed 170 linked into the air vent slot and a pencil holder 171.

Claims

A safety helmet (1) having a fitment (150) for a fitment clip (120, 140) for fitting a helmet accessory, said fitment (150) which can accommodate either a first clip (120), said first clip (120) having:
two downwardly-depending arms (121) having limited resilience;

a clip portion (123) at the end of each arm (121);

a downwardly-depending tab (122);

a support section (124) and

an outer surface (125) for fitting an accessory thereto;
or a second clip (140),
said second clip (140) having:
a first tab (141) formed from a resilient material; and

a projecting second tab (142), located on said first tab (141);
said fitment (150) comprising:
a slot (151) which can accommodate the tab (122) from said first clip (120) or the first tab (141) from said second clip (140); and

an outer surface (152); each arm (121) of said first clip (120) passes over the surface (152) bending due to the force exerted by the surface (152) until the clip portion (123) of the arm (121) passes over the end of the surface (152); and once the clip portion (123) passes over the end, the arm (121) reverts to its normal position and the clip portions (123) of the arms (121) of said first clip (120) pass under the helmet to hold

said first clip (120) in position, with the support section (124) against the outer surface of the helmet (1); and a through aperture (153) on the outer surface (152) of said slot (151) to receive the projecting tab (142) of said second clip (140).