RU2527370C2 - Self-tapping screw for fixation in opening of interior door frames - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular, to a self-tapping screw for fixation in an opening of interior door frames. The self-tapping screw from steel with a cone-shaped head with flat or convex splined surface with any of the available slots, designed for fixation of jambs of interior door frames in the opening on heads of self-tapping screws screwed into the end of the opening with the help of plates, having a tetrahedral or a hexahedral "skirt" arranged behind the head on the self-tapping screw rod for screwing or unscrewing of the self-tapping screw at the "skirt" aside with a wrench, behind which there is thread rolled towards a sharpened tip on the self-tapping screw rod, at the same time the head of the self-tapping screw is round or has cut faces in the form of a hexahedron.

EFFECT: invention makes it possible under conditions, when there is no access of a tool to a self-tapping screw head, to screw or unscrew the self-tapping screw at the "skirt" with a wrench aside.

7 dwg

Description

The technical field to which the invention relates.

Indices of IPC headings to which the claimed invention relates: F16B 23/00, F16B 25/00, F16B 25/04, E06B 1/56.

The self-tapping screw for fastening in an aperture of boxes of interior doors.

The invention relates to the field of construction.

The prior art.

At present, wood screws with countersunk conical heads with various slot shapes are widespread. Such a screw is described in the invention RU 2335666 C2 "Wood and plastic screw". In the invention RU 2387778 "Method of fastening in the opening of the boxes of interior doors" it is proposed to fasten the jambs of the boxes of interior doors on the heads of screws screwed into the end of the opening using plates. At the same time, to adjust the position of the box in the opening, it is necessary to screw or unscrew these screws from the wall during installation. Given that the head of the self-tapping screw is under the plate, in order to screw or unscrew the screw, it is necessary to remove the jamb from its head with the plate fixed to the jamb.

SUMMARY OF THE INVENTION

The proposed self-tapping screw due to the presence of a tetrahedral or hexagonal “skirt” on its rod allows, in conditions when there is no access to the head of the self-tapping screw of the tool, the self-tapping screw is screwed or unscrewed behind the “skirt” with a wrench on the side. The proposed self-tapping screw has a cone-shaped head 1 with a flat (figure 2) or convex (figure 1) spline surface with any of the common slots. The head can be round (figure 3) or have cut edges in the form of a square (figure 4) or hexagon (figure 5). Behind the head on the rod 2 (FIG. 1, FIG. 2), a square (FIG. 6) or hexagonal (FIG. 7) “skirt” 3 (FIG. 1, FIG. 2) is located. A thread is rolled behind the skirt towards the pointed tip on the self-tapping rod.

The technical result.

1. The presence of a tetrahedral or hexagonal “skirt” on the self-tapping rod allows, in conditions when there is no access to the head of the self-tapping screw, to screw or unscrew the self-tapping screw on the “skirt” with a wrench on the side.

The list of figures of drawings and other materials.

figure 1 is a General view of a self-tapping screw with a head with a convex spline surface.

figure 2 is a General view of a self-tapping screw with a head with a flat spline surface.

figure 3 - a round head screw with a cross slot.

figure 4 - the head of the self-tapping screw with a cross slot with cut edges in the form of a square.

figure 5 - the head of the self-tapping screw with a cross slot with cut edges in the form of a hexagon.

6 - "skirt" on the rod of a self-tapping screw in the form of a square.

Fig.7 - "skirt" on the shaft of the self-tapping screw in the form of a hexagon.

The implementation of the invention.

The proposed self-tapping screw can be made of steel by the traditional method of die forging followed by thread rolling.

Claims (1)

A self-tapping screw made of steel with a cone-shaped head with a flat or convex slotted surface with any of the common slots, intended for fastening in the aperture of the jambs of the interior door boxes on the heads of self-tapping screws screwed into the end of the aperture, having a tetrahedral or hexagon behind the head on the self-tapping rod skirt ”for screwing or unscrewing a self-tapping screw for a“ skirt ”on the side with a wrench, behind which a thread is rolled on the tip of the self-tapping rod, while the morza is round or has cut edges in the form of a hexagon.

Images