LOAD-CARRYING PLATE ELEMENT

Abstract: A load-carrying plate element comprising a load-carrying plate (1) constituting the central body of the element. The element has a low weight and can withstand impacts and blows and even high spot loads. The details comprised therein, further, can be varied and exchanged according to demand and wear. A separate surface plate (2) is attached against at least one of the large surfaces of the plate and is maintained attached thereto by means of a frame (4), which comprises an edge flange (5) for abutment to the edge surfaces of the plate, and a lateral flange (7) projecting perpenducularly to the edge flange and abutting the outer surface (2) of the surface plate, and the frame is detachably attached on the plate.

Description: *. Load-carrying plate element ■ This invention relates to a load-carrying plate element, which comprises a load-carrying plate constituting the central body of the element. It is known to manufacture sandwich elements consisting of a cellular plastic core and a thin metal sheet. Such an element has good rigidity and low weight. The present invention has the object to produce an element which,' in addition to its low weight and load- -carrying property, also can withstand blows and impacts and even high spot loads. A further object of the in¬ vention is to provide a structural design, at which the details comprised therein can be varied and ex¬ changed according to desire and wear. One and the same core, for example, shall be used, but the nature of the surface coat is adapted to the intended specific purpose of the plate. In order to achieve the aforesaid objects, the invention is characterized in that a separate surface plate is attached against at least one of the large surfaces of the plate and maintained attached thereto by means of a frame, which comprises an edge flange for abutment ._ ' to the edge surfaces of the plate, and a lateral flange projecting perpendicularly to the edge flange and abutting the outer surface of the surface plate, and the.frame is detachably attached to the plate. 1 * Two embodiments of the invention are described in the following, with reference to the accompanying drawing, in which Fig. 1 is a cross-section through the element according to the invention, Fig. 2 is a perspective view from below of a frame comprised in the element, and Fig. 3 is a cross-section of a second embodiment of the invention. Fig. 1, thus, is a cross-section of a load-carrying plate element according to the invention, which com- prises a load-carrying plate 1 constituting the central body of the element. A separate surface plate 2 is attached against at least one of the large surfaces 3 of the plate 1. Said surface plate can be of optional material, depending on the stresses to which the outer surface of the element, i.e. the upper surface in Fig. 1, is subjected. When the element is_ to be used for a purpose implying heavy blows or impacts on the element, the surface plate 2 shall be of a material withstanding such stresses. The surface plate 2 is maintained attached to the plate 1 by means of a frame 4, which comprises an edge flange 5 for abutment to the edge surfaces 6 of the plate,and a lateral flange 7 projecting perpendicularly to the edge flange 5 and abutting the outer surface of the surface plate 2 at leat after a marginal area. The frame 4 is detachably attached to the plate in an optional manner, for example by screw connection. Fig. 2 shows the frame 4 seen from below, where the frame thus appears having box design, where no bottom is provided, except at the lateral flanges 7. Fig. 3 shows a second embodiment,, which in principle implies a doubling of the structural design shown in Fig. 1. The load-carrying plate 1 according to Fig. 3 comprises two plates placed one upon the other. This, however, is not necessary, of course, but only one load-carrying plate can be used which may have any optional thickness. As appears from Fig. 3, a distance prevails between the two frames 4. The distance is chosen suitably with a suitable dimension. As appears from Fig. 3 3 a groove 8 is obtained which extends all about the plate element. By applying a key inserted into said groove, thus, a plurality of plate elements can be jointed one side to the other and form larger surfaces coherentl su orted. ^ The material in the load-carrying plate can be cellular plastic, lightweight concrete or another material with \ load-carrying capacity, i.e. resistance against bending. <k The material in the frame preferably is metal, but may also be some kind of plastic. The material in the surface layer 2 is chosen in view of the external stresses, to which the element is subjected, It may, thus, be possible to select a material resistant to . chemical attacks. Due to the fact that the frame 4 is detachable, the surface plate can be exchanged when the wear thereon has developed too far, or when the plate is to be used for a purpose different of the original one.

Claims: Claims 1. A load-carrying plate element comprising a load- -carrying plate (1) constituting the central body of the element, c h a r a c t e r i z e d i n that a separate surface plate (2) is attached against at least one of the large surfaces (3) of the plate and is maintained attached thereto by means of a frame (4), which comprises an edge flange (5) for abutment to the edge surfaces (6) of the plate, and a lateral flange projecting perpendicularly to the edge flange and abutting a margin area of the outer surface of the surface plate, and the frame is detachably attached to the plate. 2. A load-carrying plate element, at which the load- carrying plate is provided with a surface plate on each large surface, c h a r a c t e r i z e d i n that two frames (4) are arranged with distance between the edge flanges. " O PI

Inventors: NYBERG DAVID, NYBERG, DAVID
Applicants: ALLPINE PLYWOOD AB
Application year: 1983
Main classification: E04C2
IPC codes: E04C2