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Screw with a multi-speed jack thread and fastening arrangement for same

A technology for fixing systems, threads, applied in the direction of threaded fasteners, screws, bolts, etc.

Active Publication Date: 2019-01-04
SFS GRP INT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Even if the combination of unthreaded section, under-head thread and gasket / sealing element proves to be feasible, this combination has the problem that the profile plate, as the uppermost and most exposed element to the State-of-the-art screws are only carried by the thread end in the installed state
However, this improved support surface itself is only arranged on one side, and the pressing force of the profiled plate acts on the underside of the head, albeit planarly, but asymmetrically on the periphery.

Method used

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  • Screw with a multi-speed jack thread and fastening arrangement for same
  • Screw with a multi-speed jack thread and fastening arrangement for same
  • Screw with a multi-speed jack thread and fastening arrangement for same

Examples

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Embodiment Construction

[0032] Figure 5 A screw 10 is shown comprising a head 11 and a shank 18 defining the longitudinal axis of the screw. A (second) threaded section 15 extends from the tip 16 into the shaft. Below the head 11 of the screw 10 , viewed from the head 11 towards the tip 16 , follow an unthreaded underhead section 12 of defined length and a first thread section 13 (underhead thread). According to the invention, the under-head thread is designed to be at least double-threaded. The unthreaded shaft section 14 is then followed by the already described second threaded section 15 .

[0033] figure 2 A detail of a preferred embodiment of the underhead thread 13 is shown, an asymmetric design with different angles α, β. According to the invention, α<β, ie the head-side thread flank 21 is designed to be steeper than the tip-side flank 23 .

[0034] figure 1 , 3 and 4 show different configurations of the head-side end of the thread under the head. Instead of achieving the finish with a...

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PUM

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Abstract

The invention relates to a screw (10) comprising: a head (11) having an engagement portion for a tool; a rod (18) having at least a first threaded section (13) and a second threaded section (15); anda tip (16). The first threaded section (13) is a lower head thread which is threaded immediately below the unthreaded head lower section (12). The under-head thread (13) is designed as at least a double-threaded thread, and the pitch of the first threaded section (13) is greater than the pitch of the second threaded section (15), wherein over the entire thread length of the first threaded section.The axial stroke difference can be up to 3.5 mm. Furthermore, the invention relates to a fastening system comprising such a screw and to the use of such a screw for fixing a building envelope element.

Description

technical field [0001] The invention relates to a screw comprising a head with an engagement for a tool, a shank and a tip, wherein a multi-flight under-head thread is provided immediately below the head following a non-threaded section. These screws are used to fasten the profiles of building shell elements to the base structure. [0002] Furthermore, the invention relates to a fixing system comprising such a screw and the use of such a screw for fixing building shell elements. Background technique [0003] Building shell elements are to be understood as elements for covering roofs and walls, such as panels or sandwich panels, trapezoidal panels, tall profile elements or corrugated profile elements. Sandwich panels here usually comprise a composite of insulating material and sheet metal and are also referred to below as a laminate. The base structure usually consists of wood and / or metal (profiles), but can also include brickwork or concrete. [0004] A building shell el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04F16B33/02F16B39/282
CPCF16B33/02F16B35/041F16B39/282F16B25/0031F16B25/0063F16B25/0068F16B25/0073
Inventor Y·霍尔勒R·凯勒S·考赫
Owner SFS GRP INT AG