Patent Application
20090277905
The present invention claims priority to UK Patent Application No. 0806610.2, filed Apr. 11, 2008, which is hereby incorporated by reference.
The present invention relates to a locking device for a box and relates particularly, but not exclusively, to locking devices for on-site storage boxes for tools.
With the increased usage of handheld tools on building sites it is increasingly important to ensure that such tools are securely locked away when personnel on the site are not in the immediate vicinity. Such boxes are generally made of sheet steel of around 1 mm to 3 mm thickness and once locked are designed to resist access to the inside of the box including attempting to force the box open using a bar, such as a jemmy bar. The weak point of many such boxes is the lid which in typical examples of the prior art is provided with a two point locking mechanism and sometimes with an anti-jemmy bar. The two locks are provided at either side of the lid and are generally locked with the same key. However, if both locks are not used, the box is vulnerable to attack on the unlocked side. Furthermore, in very wide boxes the centre of the lid can be vulnerable to attack. If a jemmy bar can be forced into the centre portion of the lid, the lid can be bent so as to pull the two locks out of engagement with the body of the box thereby overcoming the locking mechanism.
Existing boxes are provided with side anti-jemmy bars which is a bar or an angle that the lid abuts against making it difficult to force anything into the junction between the body and lid of the box. However, if a jemmy bar is forced into this junction there is the possibility of bending the lid outwards thereby potentially providing access to the whole box.
It is also desirable that the box has no parts that stick out from the main surface of the box so as to decrease the likelihood of people banging their legs on protruding parts.
There is thus a need for addressing these and/or other issues associated with the prior art.
According to one embodiment, there is provided a storage box which includes a body, at least partially defining a volume, for receiving items to be stored in said box. The box also has a lid, hingedly attached to said body and adapted to close said volume. Furthermore, the box has at least one lock for releasably locking at least one non-hinged portion of said lid into locking engagement with said body. At least one said lock is fixedly engaged with one of said body and said lid and includes at least one turning portion and a plurality of arms extending therefrom. These arms move between a first unlocked position and a second locked position as a result of rotation of said turning portion. A plurality of said arms have end portions adapted to extend into first recess portions in the other of said body and said lid when said arms are in said second position and said end portions do not extend into said first recess portions when said arms are in said first position. In the box, at least one of said arms has a hook portion adapted to extend into a second recess portion in the other of said body and said lid such that in said second position said hook portion comes into engagement with a surface of the other of said lid and said body thereby preventing movement of said hook portion into and out of said second recess portion. Furthermore, in said first position said hook portion is able to move in and out of said second recess portion.
By providing a box with a lock that has end portions that lock a box and hook portions that also lock the box, two different locking methods may be used from the action of a single key thereby providing a very efficient locking mechanism, making the box very difficult to force open without use of the key. The improved locking is achieved whilst using only one key to operate the lock, as an option. As a result, the box may be significantly more difficult to break into. The end portions of the arms may act as deadlocks thereby providing extremely strong locks at the corners of the lid. By additionally providing the hook portions locking towards the centre of the locking mechanism, this means that in the unlikely event that an opening force is applied to the lid so as to pull the end portions out of their respective recesses, the hooks resist this pulling. The harder a pulling force is applied the more the hooks may hook around the surface of the recess that they are engaged with, causing them to engage further as more force is applied. As a result, in order to force the storage box open may optionally not only be necessary to deform the material forming the lid, but it may also be necessary to significantly deform the material forming the arms of a lock. Since the arms of the lock are relatively small it is economical to make them from a significantly stronger steel that it is uneconomical to form the body and lid of the box from.
In one embodiment a plurality of said arms comprise respective hook portions.
The turning portion may comprise an aperture adapted to receive a key and rotation of said key by an operator results in movement of said arms between said first and second positions.
In another embodiment the lock is fixedly engaged with said lid.
The lid may comprise a first lid portion adapted to substantially form a face of said box and a second lid portion adapted to engages a first body portion. Said first body portion and said second lid portion form an adjacent face of said box.
In a further embodiment the first recess portions are formed in second and third body portions that form side faced of said box and said second recess portions are formed in said first box portion.
In one exemplary embodiment, there is provided a storage box including a body, at least partially defining a first volume, for receiving items to be stored in said box. The box also includes a lid, hingedly attached to said body and adapted to close said first volume. Furthermore the box has at least one lock for releasably locking at least one non-hinged portion of said lid into locking engagement with said body. The box also has at least one handle which itself has a recess in a wall of said body or said lid, said recess and said wall defining a second volume. The handle also includes a handle portion adapted to be gripped by an operator and a plurality of support portions attached to said body or lid within said recess. The support portions are adapted to receive said handle portion and allow rotation of said handle between a first storage position wherein said handle portion is contained with said second volume defined by said recess and a second position wherein at least part of said handle portion extends outside said second volume. The support portion further comprise at least one limiter for limiting movement of said handle portion.
By recessing the folding handle, people working near the box may be less likely to bang their leg on the handle of the box. However, this has been achieved without increasing the risk of the handle damaging the hand of the person picking the box up, by limiting the extent to which the handle is able to rotate. As a result, the box is safer to lift and to work in the vicinity of.
In one embodiment rotation from said first portion to said second position is rotation through 90 degrees.
According to a further exemplary embodiment there is provided a storage box including a body, at least partially defining a first volume, for receiving items to be stored in said box. The box also includes a lid, hingedly attached to said body and adapted to close said first volume. The box further includes at least one lock for releasably locking at least one non-hinged portion of said lid into locking engagement with said body. Furthermore, the box has at least one anti-jemmy device for protecting a junction between body and said lid when said box is in a closed condition. At least one said anti-jemmy device comprises a first bar portion extending from one of said body and said lid and a second bar portion at least partially covering at least one said junction.
By providing a second bar portion partially covering the junction between the body and the lid of the storage box, the box may be significantly more difficult to force open using a jemmy bar or similar device. This improvement in security has been achieved without significant increase in cost or risk of injury to people using or working near the box. Furthermore, the second bar portion has decreased the number of sharp corners on the box decreasing the likelihood of leg injury.
According to another embodiment there is provided a locking device for locking a first article to a second article, the first article having a first end face adapted to engage a second end face of the second article and first side faces extending from said first end face and adapted to be located between second side faces of said second article. The locking device is fixedly engaged with said first article and comprises at least one turning portion and a plurality of arms extending therefrom. The arms move between a first unlocked position and a second locked position as a result of rotation of said turning portion. A plurality of said arms have end portions adapted to extend into respective first recess portions in said second side faces when said arms are in said second position and said end portions do not extend into said first recess portions when said arms are in said first position. It is also the case that at least one of said arms has a hook portion adapted to extend into a second recess portion in said second end face such that in said second position said hook portion comes into engagement with a surface of said second end face thereby preventing movement of said hook portion into and out of said second recess portion. Furthermore, in said first position said hook portion is able to move in and out of said second recess portion as a result of movement of said first article relative to said second article.
In one embodiment a plurality of said arms comprise respective hook portions.
The turning portion may comprise an aperture adapted to receive a key and rotation of said key by an operator results in movement of said arms between said first and second positions. Various embodiments will now be described, by way of example only, and not in any limitative sense, with reference to the accompanying drawings.
a is another perspective view of the box of
b is a close up view of part of
a is a plan view of a locking device used in the box of
b is a front view of the locking device of
a is a rear view of a lid of the box of
b is a side view of the lid of
c is an underneath view of a lid of
d is an enlarged view of a portion of
a is a front view of the box of
b is an enlarged portion of
c is a side view of the box of
d is an enlarged view of a portion of
a is a side view of the box of
b is a sectional view along the lines A-A in
c is an enlarged view of a portion of
d is an enlarged view of a portion of
a shows a front view of a side portion of the body of the box shown in
b is an end view of the side of
c is an enlarged view of a portion of
a, 10b and 10c show a part of an anti-jamming bar which is attached to the box of
Referring to
Referring to
The inner surface of side faces 20 and 22 are provided with a first recess 58 that is adapted to receive end portion 54 of arm 46. The front face 26 of body 12 has a lip 59 that extends perpendicular to the front face 26 and has second recesses 60 formed therein. The second recesses 60 are simply apertures formed in lip 59 and as a result a lower surface 62 of lip 59 is accessible through the aperture formed as part of second recess 60. This lip 62 may be strengthened using additional small pieces of steel or other material that is stronger than the steel sheet from which the body and lid are formed.
Referring to
The box is also provided with pneumatic support stays 96 to maintain the lid in an open position when required. An anti-jemmy bar 98 extends around the box at least partially covering the non-hinged junction between the body 12 and lid 14. On the side faces 20 and 22 of body 12 the anti-jemmy bar 98 is located on the body whereas for the front faces 26 and 30 it is located on the front face 30 of lid 14.
Referring to
When lid 14 is moved into a closed position edges 118 and 120 of side portion 34 are located between the side face 20 and extension portions 106 and 108 respectively. As a result, it is virtually impossible to get any perches on the edges 118 and 120 of lid 14 in order to attempt to bend it or force it open. Furthermore, the extension portions 106 and 108 prevent the side portion 34 from being bent away from its position adjacent the side face 20 of body 12. The portion 116 of anti-jemmy bar 98 similarly protects the side portion 32 of lid 14.
With reference to
In use, when the lid 14 of box 10 is moved from the open position, shown in
At the same time the hook portions 56 are caused to move in opposing directions and as a result the hook ends 57 extend partially under lip 59 and beyond the aperture that forms the opening in recess 60. As a result, if lid 14 is moved in a direction in an attempt to open the box, the hook ends 57 come into engagement with lower surface 62 of lip 59 and are prevented from movement. If a person attempting to gain entry to the box 10 uses a bar to force the lid open the force applied towards the centre of the lid pulls the hook ends 57 into engagement with surface 62, making it almost impossible to force the lid open. In order for the lid to be forced open it is may be necessary to break or significantly deform the hook portions 56. Furthermore, as can be seen in
While various embodiments have been described above, it should be understood that they have been presented by way of example only, and not limitation. Thus, the breadth and scope of a preferred embodiment should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
For example, this locking mechanism described above could be used in other situations where two elongate edges are brought together and locked. An example of such a situation might be where a first article is locked to a second article, where the first article is slidingly received in a second article such as a cupboard with a sliding door. The first article, the door, has a first end face adapted to engage a second end face of the second article, the cupboard. The door also has top and bottom first side faces extending from the first end face and these are slidingly located between second side faces of cupboard. The locking device is fixed to the door. As seen on the device used on the box, there is a turning portion that receives a key and two arms extending therefrom. The arms move between an unlocked position and a locked position as a result of rotation of said turning portion. The arms have end portions adapted to extend into respective first recess portions in the second side faces of the cupboard when the arms are in the locked position and the end portions do not extend into the first recess portions when the arms are in the unlocked position. At least one, or both, of the arms have hook portions that extend into respective second recess portions in the second end face of the cupboard such that in locked position the hook portions comes into engagement with an inner surface of the second end face thereby preventing movement of the hook portion into and out of the second recess portion and that in the unlocked position the hook portion is able to move in and out of the second recess portion as a result of movement of the door relative to the cupboard. In this way, the locking device may be used on such a cupboard in a manner at least similar to that set out above for the box.
| Number | Date | Country | Kind |
|---|---|---|---|
| 0806610.2 | Apr 2008 | GB | national |
