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Screw grommet

A technology of screws and sleeves, applied in the direction of connecting components, thin plate connections, nuts, etc., can solve problems such as leg twisting, damage, and leg damage

Inactive Publication Date: 2007-07-11
NEWFREY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the self-tapping screw is screwed into the leg and a strong clamping torque from the self-tapping screw is applied to the free end of the leg, a strong moment is applied to the base of the leg (end of the shank), whereby the leg is clamped. distort and destroy
Since recent fastening tools are powerful and compact, self-tapping screws apply a strong torque and there is a high chance of damage to the legs

Method used

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Examples

Experimental program
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Embodiment Construction

[0025] The following is an explanation of working examples of the present invention with reference to the drawings. 1 to 11 show a screw sleeve in a working example of the invention. The screw sleeve 1 is an integral plastic fastening tool. The screw socket 1 is equipped with a flange 2 and a shank 3 extending from the flange 2 . The shank 3 is tubular and intended to be inserted into a connection hole 6 in a workpiece 5 such as a vehicle body (FIG. 10). A pair of anchor-like legs 7, 7' The end of the leg 7 facing the flange 2 is a free end. It extends radially outwards from the shank 3 and is flexible so as to bend radially inwards and outwards. The ends of the legs 7 are connected to the main part 9 of the handle 3 and the other ends are separated from the main part 9 of the handle by a U-shaped groove 10, as shown in FIGS. 1 and 2 . These are also flexible so as to bend radially inwards or outwards relative to the main part 9 of the shank.

[0026] A through hole...

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PUM

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Abstract

The screw grommet (1) comprises a flange (2) and a shank (3) extending from the flange. The shank is provided with flexible legs (7) extending from the end of the shank towards the flange and outwardly from the shank. The shank has a screw insertion hole (13) into which a tapping screw is screwed to prevent the legs from being bent radially inward towards the shank so that the screw grommet is fixed to the workpiece by means of the legs and the flange. The inner portion of the legs is provided with a threaded section turned by screwing in the tapping screw. The flange (2) is integrated with a tubular fastening torque bearing section (18) extending in the direction opposite the shank (3). The fastening torque bearing section is formed with a screw insertion hole having a diameter smaller than the outside diameter of the tapping screw so as to receive the tapping screw.

Description

technical field [0001] The present invention relates to a plastic screw grommet for attaching and fixing an accessory such as a cover to a workpiece such as a vehicle body by screwing in a self-tapping screw, and more particularly to a Screw sleeves that maintain a high level of adhesion while reducing the clamping torque load on the legs of the shank when inserted. Background technique [0002] Such a screw socket is known in the art, wherein the socket is equipped with a flange and a shank extending from the flange, wherein the shank is hollow and inserted into a connection hole on the workpiece, wherein the shank has a a flexible leg extending towards the flange and radially outwardly from the shank, with the end towards the flange being a free-ended flexible leg, wherein threaded through holes are formed in the flange and shank for receiving self-tapping screws, Wherein screwing self-tapping screws into the threaded through-holes prevents the free ends of the legs from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B37/04F16B5/02F16B37/00
CPCF16B37/043F16B5/0258F16B37/041F16B37/005
Inventor 蟹江秀树传刀正志
Owner NEWFREY