BR102014028524A2 - fastener for insertion into a previous wall drilling - Google Patents

Abstract

a pre-drilled wall mounting fastener consisting of a cylindrical body (7), preferably solid, has on the outer cylindrical surface a plurality of longitudinally disposed cavities (8) and within each cavity (8) there are expansion segments ( 2) with one end set into cavity (8) and the other free end and expansion segment (2) at an angle of less than 90 ° to the body axis (7) and expansion segments (2) in pairs and in diametrically opposed positions, the inner wall of the wall bore is pressed and pressed, making the fixation, and the rear end of the body (7) has anvil (4) and annular edge (5) spaced by a recess (6).

Description

FIXER FOR DRILLING INSERT PREVIOUSLY WALLED

[001] It is a rigid and massive fastener all made of thermoplastic polymeric material. Used for insertion into previously performed perforation. Allows the user to apply the product directly inside a masonry or wood wall hole without the aid of tools or other components.

[002] Currently fasteners that are used to hold objects on walls or equipment are applied by the user mainly through screw, which implies the use of tools such as screwdriver. The most commonly used fasteners are the bushing and nail assemblies. These devices are well known and used in various applications whether for fixing objects to residential walls or even for use in buildings or construction works. Documents proposing systems similar to those already mentioned include: PI 9201081-4 and PI 9814305-0. However this system needs tools to be installed. Once the hole is drilled in the wall and / or in the desired location, the screw is inserted into the bushing using tools such as screwdrivers. This provides discomfort at the time of installation for certain audiences as individuals with little knowledge or practice with hand or power tools.

[003] The FASTENER, described in this report, is characterized by a single piece that unites the technical qualities of plastic screws and bushings into one fast and efficient handling product. The great advantage of the FIXATOR is its use without the need for tools to be installed in the desired location. The non-use of tools for fastener installation further simplifies their use compared to systems already known as bushings and screws, and makes systems very simple and efficient. With the drilling in the desired location for fixing the fastener, simply applying it on site, to be placed by anyone without the need for tools or any further knowledge. Not requiring either strength or skill with tools by the applicator.

The accompanying drawings and the detailed description that follows are merely given by way of example, as said object may be designed by other known engineering solutions. Therefore, specific structural and functional details disclosed herein should not be construed as a limitation, but only as a basis for the claims; It acts as a representative basis for teaching an expert in the art of employing and putting into practice the development of the object described in this report, based on the detailed constructive provision hereafter.

[005] Figure 1 is a perspective view of the fastener (1) showing the massive body (7), the expansion segment (2), the tapered tip (3); the stop (4), the annular edge (5); the recess (6) and the recesses (8).

[006] Figure 2 is a side view of the fastener (1) showing the massive body (7), the expansion segment (2), the tapered tip (3); the stop (4), the annular edge (5); the recess (6) and the recesses (8).

Figure 3 is a cross-sectional view of the body (7) showing the expansion segments (2) set in the bottom of the cavities (8); further shows the annular edge (5).

[008] Figure 4 shows detail of the expansion segment crimping (2) in the solid body (7). The crimping occurs at the bottom of the cavity (8).

The FIXATOR described in this report is a thermoplastic polymeric element manufactured by the injection molding process consisting of a preferably solid cylindrical body, called body (7), which has on the outer cylindrical surface a plurality of cavities (8). ) disposed longitudinally and within each cavity (8) has expansion segments (2) with one end set within the cavity (8) and the other free end and the expansion segment is at an angle of less than 90 ° to the axis of the body (7). Expansion segments (2) have a section equal to or less than the cavity section (8).

[010] During the penetration of the body (7) into the wall hole, the expansion segments (2) fit into the cavities (8) existing along the body (7). The expansion segments (2), in pairs and in diametrically opposite positions, support and press the inner wall of the wall hole, making the fixation; Expansion segments (2) act similar to the "arrowhead" facilitating the penetration of the body (7) into the wall hole, limiting its exit because the exit angle is preferably from 20 to 60 degrees relative to the inner walls of the hole. . In the front of the body (7) there is a diameter decrease with a tapered tip (3) to facilitate the positioning of the fastener (1) in the hole. At the rear of the body (7) is the annular edge (5) which limits the penetration of the fastener (1) and covers and finishes the fastener on the wall. Still in the same back, there is a second stop (4) which has the purpose of allowing it to be directed to the hole by hand and has a predefined recess (6) for the support of objects, mainly decorative on walls. The fastener (1) can be manufactured with different dimensions, according to its application and hole size to which it will be used. Keeping the same functional configuration, the dimensions of the fastener (1) may vary according to the hole diameter, body length (7), undercut length (6), tapered tip diameter (3), undercut diameter (6 ), annular edge diameter (5) and second stop diameter (4). The diameter of the second stop (4) must always be larger than the recess (6); at least 2 millimeters. The diameter of the annular edge (5) must be greater than or equal to the diameter of the second stop (4). The length of the tapered end (3) of the fastener (1) shall be a maximum of 5 millimeters. Although the present report describes cylindrical body (7) fastener, the same functional configuration can be obtained with polygonal, triangular, square, hexagonal and other type prismatic body.

[011] The choice of fastener type depends on the application it will be used meeting various demands for various sectors, where according to its different characteristics it is possible to support more or less static loads.

CLAIM

Claims (2)

1. PREFERRED WALL DRILLING FIXER characterized in that it comprises a cylindrical, preferably solid, body (7) having on the outer cylindrical surface a plurality of longitudinally disposed cavities (8) and within each cavity (8) having segments expansion (2) with one end set into the cavity (8) and the other free end and the expansion segment (2) at an angle of less than 90 ° to the body axis (7) and the expansion segments (2) ) have a section equal to or smaller than the section of the cavity (8); and the rear end of the body (7) has anvil (4) and annular edge (5) spaced by a recess (6). PREFERRED WALL INSERT FIXER according to claim 1, characterized in that the body (7) has a prismatic shape of polygonal straight section.