Bolt that can be pressed into a metal sheet in a torsion-proof and ejection-proof manner
Disclosed is a bolt ( 10 ) that can be pressed into a metal sheet in a torsion-proof and ejection-proof manner and comprises a head ( 12 ). The side of the head ( 12 ) facing the metal sheet after being inserted is provided with radially arranged webs ( 22 ) which are pressed in when being inserted into the metal sheet. A cylindrical winding support ( 14 ) is disposed in the center of the head ( 12 ). Said winding support ( 14 ) extends through the metal sheet and protrudes on the other side thereof while being provided with a circumferential annular groove ( 20 ) near the side of the head ( 12 ) that faces the metal sheet in the set state. The sheet metal material that is displaced during the setting process can be pressed into said annular groove ( 20 ). All or part of the side of the head ( 12 ) facing the metal sheet is provided with a rubber-elastic sealing material ( 110 ).
1 . Bolt ( 10 ) that can be pressed into a metal sheet in a torsion-proof and ejection-proof manner having a head ( 12 ) the side of which facing the metal sheet in the set state is having radially extending webs ( 22 ) which during the setting are impressed into the metal sheet, wherein in the centre of the head a cylindrical winding support ( 14 ) is positioned which is extending through the metal sheet an protrudes on the other side thereof and which is having in vicinity of the side of the head ( 12 ) fag the metal sheet a circumferential annular groove ( 20 ) into which the sheet metal material that is displaced during the setting process can be pressed, characterised in that the side of the head ( 12 ) facing the metal sheet completely or partly is provided with a rubber-elastic sealing material ( 110 ; 120 ; 130 ).
2 . Bolt according to claim 1 , characterised in that the webs ( 22 ) basically are having a rectangular cross-section with their side walls ( 24 ) extending perpendicular to the side of the head ( 12 ) facing the metal sheet.
3 . Bolt according to claim 1 , characterised in that the webs ( 22 ) in their radially exterior region are tapering off flatly.
4 . Bolt according to claim 1 , characterised in that the webs ( 22 ) in their radially exterior region ( 21 ) are tapering off laterally rounded.
5 . Bolt according to claim 1 , characterised in that it can be pressed into metal shoots with holes without special additional shapes as collars or the like.
6 . Bolt according to claim 1 , characterised in that merely the area outwardly of the webs ( 22 ) are provided with the rubber-elastic sealing material ( 110 ) while the webs ( 22 ) themselves are free from the sealing material ( 110 ).
7 . Bolt according to claim 1 , characterised in that the sealing material ( 120 ) exclusively is provided in the region of the outer edge of the head ( 12 ) facing the metal sheet.
8 . Bolt according to claim 1 , characterised in that the sealing material ( 130 ) exclusively is provided in an annular groove ( 134 ) in the head ( 12 ) which is positioned outwardly of the radial extension of the webs ( 22 ) but within the outer edge ( 132 ) of the head ( 12 ) facing the metal sheet.
9 . Bolt according to claim 1 , characterised in that the sealing material ( 110 ; 120 ; 130 ) is consisting of polyurethane, polyamide, polyolefin, polyteluoretylene or epoxy resin.