A fastener for fixing an edge portion of a resilient material to a surface comprising a base element fixed in use to a surface, and a removable clip element, in which the clip element is provided with a first part of engagement means, and the base element is provided with a second part of engagement
A fastener for fixing an edge portion of a resilient material to a surface comprising a base element fixed in use to a surface, and a removable clip element, in which the clip element is provided with a first part of engagement means, and the base element is provided with a second part of engagement means, in which in use a resilient material is disposed adjacent the base element such that when the first part and the second part of the engagement means are aligned for engagement in use a portion of the clip element extends over an edge portion of the resilient material, in which in use said portion of the clip element is applied to said edge portion of the resilient material with a compression force, in which said compression force is required in order to engage said engagement means, and in which once the engagement means is engaged the compression force is removed and an extension force applied by the resilient material to said portion of the clip element forces said engagement means into engagement, in which the engagement means can only be disengaged when said compression force is applied to said portion of said clip element, and in which in use the clip element extends from the surface, over the base element, and onto the resilient material.
대표청구항▼
The invention claimed is: 1. A fastener for fixing an edge portion of a resilient material to a surface comprising a base element fixed in use to a surface, and a removable clip element adapted to be removably engaged with said base element, in which both the base element and the clip element are c
The invention claimed is: 1. A fastener for fixing an edge portion of a resilient material to a surface comprising a base element fixed in use to a surface, and a removable clip element adapted to be removably engaged with said base element, in which both the base element and the clip element are constructed from a substantially non-resilient material, in which the clip element comprises a first part of engagement means, and the base element comprises a second part of engagement means, in which in use a resilient material is freely removably disposed on said surface adjacent a first end of the base element in which when the first part and the second part of the engagement means are aligned for engagement in use a portion of the clip element extends over an edge portion of the resilient material, in which in use said portion of the clip element is applied to said edge portion of the resilient material with a compression force, in which said compression force is required in order to engage said engagement means, and in which once the engagement means is engaged the compression force is removed and an extension force applied by the resilient material to said portion of the clip element forces said engagement means into engagement, in which said extension force is the only force forcing the engagement means into engagement, in which the engagement means can only be disengaged when said compression force is applied to said portion of said clip element, and in which the clip element is shaped such that it extends from the uncovered surface adjacent a second end of the base element, over the base element, and onto the resilient material. 2. A fastener as claimed in claim 1 in which the first part of the engagement means comprises a substantially L-shaped lug extending from an underside of the clip element, and the second part of the engagement means comprises a catch adapted to engage with the lug in use, in which the lug must be brought under the catch and moved laterally towards the catch for engagement therewith, and in which the extension force forces the lug into engagement with the catch in use. 3. A fastener as claimed in claim 2 in which the portion of the clip element which extends over the resilient material in use ends at a first end of the clip element, and the clip element has a second end opposite to the first end, in which the first part of the engagement means further comprises an abutment extending from the underside of the clip element at said second end of the clip element, in which the second part of the engagement means further comprise a lip which is spaced apart from the catch and which is in front of the abutment when the lug and the catch are engaged in use, and in which in use the extension force rotates the clip element about the lug and catch and forces the abutment into position behind the lip such that the lug cannot be moved laterally from under the catch. 4. A fastener as claimed in claim 3 in which a pivot arm is provided on the underside of the clip element between the lug and the portion of the clip element which extends over the resilient material in use, in which the pivot arm extends below the level of the lug, and is spaced apart from the surface when the extension force is applied in use. 5. A fastener as claimed in claim 3 or 4 in which the base element comprises a base provided with fixing means, an end wall at a first end, the lip at a second end, and the catch extending from a top side, in which in use the fixing means fixes the base to the surface. 6. A fastener as claimed in claim 5 in which the clip element is substantially arcuate in shape. 7. A fastener as claimed in claim 6 in which a top side of the clip element is provided with grip ribs. 8. A fastener as in one of claims 3-4 or 6-7, in which the lug is provided with a guide plate which extends downwards from an end of the lug at an angle, in which the catch is provided with an angled end adapted to co-operate with the guide plate in use, and in which the fastener is shaped and dimensioned such that when the clip element is applied to said edge portion of the resilient material ready for the compression force to be applied, the guide plate engages the angled end of the catch. 9. A fastener as in one of claims 3-4 or 6-7, in which the lug is provided with an angled guide face at its free end, in which the catch is provided with an angled end adapted to co-operate with the guide face in use, and in which the fastener is shaped and dimensioned such that when a portion of the clip element extends over an edge portion of the resilient material in use, ready for the compression force to be applied, the guide face engages the angled end of the catch. 10. A fastener as claimed in claim 8, in which the base element is shaped to define a trough between the catch and the lip, in which said trough is adapted to receive a key arm of a corner element in use. 11. A fastener as claimed in any one of claims 3-4 or 6-7, in which the first end of the clip element is provided with a spike element extending downwards, which spike element is adapted to grip the resilient material in use. 12. A fastener as claimed in any one of claims 3-4 or 6-7, in which the second end of the clip element tapers to a point such that a small gap is left under the second end of the clip element when it is fastened to the base element in use. 13. A fastener as claimed in any one of claims 3-4 or 6-7, in which the fastener is provided in elongate strips adapted to fit around all the sides of a piece of resilient material. 14. A fastener as claimed in claim 13 in which the base element and the clip element are constructed from a metal extrusion. 15. A fastening frame for fixing a piece of resilient material to a surface comprising a frame work of base elements fixed in use to a surface, and a framework of removable clip elements, in which the clip elements are provided with a first part of engagement means, and the base elements are provided with a second part of engagement means, in which in use a resilient material is disposed within the frame work of base elements such that when the first part and the second part of each engagement means are aligned for engagement in use a portion of each clip element extends over an edge portion of the resilient material, in which in use said portion of each clip element is applied to each of said edge portions of the resilient material with a compression force, in which said compression force is required in order to engage each of said engagement means, and in which once each engagement means is engaged the compression force is removed and an extension force applied by the resilient material to said portion of each clip element forces each of said engagement means into engagement, in which each engagement means can only be disengaged when said compression force is applied to said portion of each clip element, and in which in use each clip element extends from the surface, over the corresponding base element, and onto the resilient material. 16. A fastening frame as claimed in claim 15 in which the frame work of base elements comprises three or more elongate strips and three or more base corner elements, and the frame work of removable clip elements comprises three or more corresponding elongate strips and three or more clip corner elements, in which the base corner elements are arranged in use at corners of the framework of base elements, in which the clip corner elements are fastened to the base corner elements in use, and in which the clip corner elements are provided with portions at each end which extend over the clip elements after the clip elements have been engaged with the base elements in use, thereby to hold the clip elements in position. 17. A fastening frame as claimed in claim 15 in which the frame work of base elements comprises three or more elongate strips, the frame work of removable clip elements comprises three or more corresponding elongate strips, and three or more corner elements are provided, in which the base elements are provided with a trough, in which the corner elements are provided with key arms adapted to slot into said troughs, in which the corner elements are attached to the base elements in use by means of the key arms, and in which the base elements are fastened to a surface in use.
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