A corner protective means for walls, beams, columns etc.

Abstract: A corner protective means (1) for walls, beams, columns, etc. which has adequately formed bevel angles, rib strips (11), and bent tails (13) on its two wings (10) so that more powerful grip stength may be provided by it when it is burried into a cement roughcast before the cement is dried. With this corner protective means, a faster and easier installation is available while smoother surface finish of wall corner may be achieved easily.

Description: The invention relates to a corner protective means for walls, beams, columns etc. with an arc shaped front and two integrally formed wings, said wings extending from two edges of said arc shaped front, permitting the wings to extend in a direction substantially parallel to a wall surface of a corner over which said means is installed, whereby said wings have protrusions and a bent tail formed at their free ends each, which is directed further into the wall surface. In common construction of civil engineering, a lot of time is wasted in stuccoing and strengthening projected corners of walls, beams, columns, etc. Due to lack of proper corner protective means, defects such as insufficient strength of corner, inferior appearance, etc. also exists when the constructions is completed. There are however already commercially available corner protective means, for instance the device for aiding the production of surface finishes described in the GB-A-2 056 523 or the DE-U-7 933 290. These corner protective means are inconvenient in installation, of inferior quality, of low performance and becoming loose easily. The device described in the preamble of claim 1 and disclosed in the GB-A-2 056 523 for instance is not engulfed by the concrete of the wall, but only the tails of said device are anchored in the wall. Further, the device provides no measures for ensuring a smooth wall surface which is flush with the edges of the arc shaped front of the corner protective means. This is neither practical in use nor desired by architects. The second known art, the DE-U-7 933 290, describes also only a device for the easy installation of tiles. In its elastical embodiment, the device can not spread forces over sufficiently great areas in the wall, which causes the problem of the elastical material breaking out of the rigid plaster coating. Both known devices are provided with area-holes to ensure their connection with concrete or plaster. Area holes allow the concrete to form bridges between both sides of the device. During shrinking of the concrete there occur however cracks in the same. Therefore, it is the object of the invention to develop a corner protective means for walls, beams, columns etc. which is providing a secure hold in the surrounding material while providing flush surfaces at the outside for tiles, panels or simple concrete. It shall provide a strong and protective corner without having the disadvantages of area-holes in which the shrinking of the concrete or plaster when drying causes problems with the secure fit. Further, it is an object of the present invention to provide a corner protective means which has a generally arc shaped front and two wings extending from said two edges of the arc shaped front to form a generally right angle, and may be inserted into the concrete before the final finishing of the walls, beams, columns etc., so that it may firmly grip the concrete structure. These objects of the invention are solved by the measures proposed in the main claim. So the structure with its many ribs, bent tails and bevel angles formed on its two wings can firmly grip the concrete structure. The structure, functions, and other advantages of the present invention may be readily understood by referring to the following description and accompanying drawings in which: Fig. 1 is a three-dimensional perspective of the invention; and Fig. 2 illustrates a corner protective means of the invention having been installed to join with the concrete wall corner. Referring to Fig. 1, the corner protective means 1 of the invention generally has an arc shaped front and two wings 10 extending outward from a direction given by prolonging the ends of the front in a straight line from the two edges of the arc shaped front. The wings 10 are generally symmetrically formed, so that the description of one wing shall represent both wings in the specification. The wing 10 firstly bends inward from a direction given by prolonging the ends of the front in a straight line at an edge of the arc shaped front, then bends outward from a direction given by prolonging the ends of the front in a straight line to form an angle about 30 or 40 degrees so that the whole arc shaped portion of the corner protective means 1 looks like a dovetail. Furthermore, on both sides of the wing 10, a plurality of rib strips 11 are formed to increase the contact area of the wing 10 with concrete structure and thereby strengthen the holding of wing 10 by the concrete. A bent tail 13 is formed at the open end of the wing 10 to reinforce the grip capability of the wing 10. Referring further to Fig. 2, a corner protective means of the present invention having been installed and inserted on a wall corner is illustrated. From this figure, a powerful joining strength provided by the dovetail-shaped structure, the rib strips 11 and the bent tails 13 of the corner protective means 1 can be fully understood. During construction, please refer to Fig. 2, concrete walls, beams, columns, and their projected corners 14 formed by grouting usually have a surface which needs a first time cement coating to form a layer of roughcast 15. During the process of coating this roughcast 15, the corner protective means 1 of the invention is positioned over the projected corner 14 in a manner that the wings 10 are buried into the roughcast 15 before the same is dried. When the roughcast 15 is dried, the corner protective means 1 shall be firmly inserted thereon. Then, a fine finish 16 formed by a second cement coating shall provide smooth wall surface which is flush with the arc shaped front of the corner protective means 1. It is to be understood that the form of the invention shown and disclosed is to be taken as a preferred embodiment of the invention and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the scope of the invention as defined by the following claims.

Claims: Corner protective means (1) for walls, beams, columns etc. with an arc shaped front and two integrally formed wings (10), said wings (10) extending from two edges of said arc shaped front, permitting the wings (10) to extend in a direction substantially parallel to a wall surface of a corner over which said means (1) is to be installed, whereby said wings (10) have protrusions and a bent tail (13) formed at each of their free ends, which is directed further into the wall surface, characterized in that said wings (10) extend from the two edges of said arc-shaped front, first portions of said wings turned inwardly with respect to a direction given by tangentially extending the ends of said front in straight lines, the second portions of said wings (10) turned outwardly with respect to directions given by extending the ends of the inwardly angled portions, to form angles of about 30 to 40 degrees between the second portion of each of the wings in a direction to the wall surface from the sectorial front, permitting the wings (10) to extend in a direction slightly inclined to the wall surfaces along which said corner protective means (1) is installed, said wings (10) having a plurality of rib strips (11), said rib strips (11) are formed on both sides of said wing (10) to increase the contact area on both sides with a concrete structure to thereby strengthen the holding of said wing (10). Corner protective means (1) according to claim 1, characterized in that said wings (10) possess a profile, which is dovetail shaped. Corner protective means (1) according to claim 1 or 2, characterized by bent tails (13) at the end of each wing (10), so that a grip capability of the wing (10) on a corner is reinforced.

Inventors: CHIANG MU-LONG, CHIANG, MU-LONG
Applicants: CHIANG MU LONG, CHIANG, MU-LONG
Application year: 1990
Main classification: E04F13
IPC codes: E04F13