Joint

Abstract

Grating, consisting of interconnected longitudinal bars (1) and infill bars (2) and frame elements (3a, 3b) enclosing this assembly, characterized in that the grating is designed such that a connection between the prefabricated assembly of longitudinal bars (1) and infill bars (2) and the frame elements (3a, 3b) is based on the principle of a positive interlocking.

Description

[0001] The present invention relates to a grate consisting of interconnected longitudinal bars and infill bars, as well as frame elements enclosing this assembly.

[0002] These types of gratings (also known as grid gratings) are of particularly robust construction and high load-bearing capacity, serving as floor coverings for heavy-duty applications. They consist of longitudinal and crossbars, with the longitudinal bars forming the main load-bearing components and the crossbars providing lateral stability and forming a composite structure, as well as a frame made of flat steel bars, which forms the outer boundary of the grating.

[0003] Regardless of their intended use, gratings are manufactured according to state-of-the-art technology using standardized production processes. The longitudinal and infill bars are joined by an interlocking, positive-locking mechanism, which is permanently bonded together under external pressing forces.

[0004] The surrounding frame, usually made of flat steel along the product circumference, is generally butt-jointed to the ends of the longitudinal and transverse beams and welded together using fillet welds.

[0005] A disadvantage of this manufacturing method with regard to attaching the frame is the welding effort. To create a durable connection, all transverse and longitudinal bars must be welded to the outer flat steel bars. With only small gaps between the regularly arranged longitudinal and transverse beams and the resulting meshes in the product, welding access is severely restricted. This necessitates turning the entire product over to allow access to the welding area from the underside.

[0006] The object of the invention is to reduce the welding effort required to connect the frame elements to the prefabricated assembly of transverse and longitudinal bars. This eliminates the need for the time-consuming process of turning the product over.

[0007] To solve this problem, the grate is designed in such a way that the connection between the prefabricated assembly of longitudinal bars and filler bars and the frame elements is based on the principle of a form-fitting interlocking.

[0008] The frame elements are positively connected to the assembly of longitudinal and cross members, preferably via a snap-fit ​​connection. The remaining welds serve only to secure the position of the frame elements on the assembly of longitudinal and cross members. This offers the advantages of faster connection and simplified manufacturing.

[0009] A preferred embodiment of the invention consists in that at least one nipple is provided on the two end faces of the longitudinal bars, wherein the frame elements have a hole at the corresponding location for receiving the nipple.

[0010] The contour of a nipple, provided for this purpose on both ends of the load-bearing longitudinal bars, engages in the similarly sized perforation of the respective frame element and secures it in this position. Due to the recurring connection design along the regularly arranged longitudinal bars with the end-mounted frame element, the latter is designed as a perforated flat steel strip.

[0011] The connection of the outer frame elements is achieved in a similar manner and involves a form-fitting arrangement of nipple and recess contours. Advantageously, this ensures a positionally accurate connection of all joining partners to one another.

[0012] The invention thus created a grate that is easier to manufacture, requires less monitoring in terms of the precision of the synthesis of the joining elements than the prior art and also improves the structural stability.

[0013] An embodiment of the invention is explained below with reference to drawings.

[0014] They show Fig. 1 the grate according to the invention in perspective view, Fig. 2 a top view of the rust, Fig. 3 the corner joints, Fig. 4 an enlarged section of a longitudinal section through a longitudinal bar.

[0015] The grate according to the invention consists of longitudinal bars (1), infill bars (2) and frame elements (3a, 3b). The frame elements (3a, 3b) forming the edging are connected to the longitudinal bars (1) at a joint (4).

[0016] Fig. Figure 1 shows the grate according to the invention in perspective view, wherein the joining point (4) essential for the invention is particularly evident from the joining partners of the frame element (3a) and the longitudinal bars (1).

[0017] It is essential for the invention that a special joining point (4) is created from the geometric modification of the load-bearing longitudinal bars (1) at their end faces in conjunction with the perforated strip-like edging made of the frame elements (3a, 3b) in the form of a flat steel, which enables a positive-locking connection of both joining partners, wherein the welding point for securing the connection is arranged on the outer circumference without spatial impairment.

[0018] The frame elements (3a, 3b) of a grid are in Fig. Figure 2 shows two different frame elements (3a, 3b) which have a special form-fitting frame connection point (6) at their corner joints (5). Each grate comprises two opposing frame elements (3a), which is designed as a perforated strip and is connected to the longitudinal bars (1), and two opposing frame elements (3b), which are connected to the infill bars (2). Each corner joint (5) of the frame elements (3a, 3b) is provided with a special connection point for relative positioning.

[0019] This frame joint (6) shows Fig. 3 in an isometric view. According to the invention, at least one frame connection point (6) is provided for each corner connection (5), depending on the height of the grate.

[0020] As a cross-section through a joint (4) Fig.4 the basic joining partners of the grid, specifying the load-bearing longitudinal bars (1), the transverse stabilizing filler bars (2) and the frame part (3a) located on the end face of the longitudinal bars (1) in the form of a perforated strip.

[0021] In accordance with the invention, the longitudinal rods (1) with their end-face nipples (1a) are inserted into the holes of the frame element (3a) designed as a perforated strip and are positioned in a form-fitting manner relative to each other.

[0022] According to the invention, at least one nipple (1a) is provided on each end face of a longitudinal rod (1) and has a preferably rectangular shape with a depth similar to the material thickness of the frame element (3a) designed as a perforated strip, in order to achieve a penetrating positive fit and ideal load transfer.

Claims

[1] Grating, consisting of interconnected longitudinal bars (1) and infill bars (2) and frame elements (3a, 3b) enclosing this assembly, characterized by , that the grid is designed in such a way that a connection between the prefabricated assembly of longitudinal bars (1) and filler bars (2) and the frame elements (3a, 3b) is based on the principle of a form-fitting interlocking. [2] Rust according to claim 1, characterized by , that at least one nipple (1a) is provided on the two end faces of the longitudinal bars (1), wherein the frame elements (3a, 3b) have a hole at the corresponding location for receiving the nipple.

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