RU1828471C - Needle for sewing machine - Google Patents

Abstract

The invention relates to constructions of needles for sewing machines and allows to expand the functionality by creating a compressed relief on the fabric. The device consists of a rod with a groove, in the lower part of the rod there is an eye and a tip ending in a right asymmetric face. The upper part of the rod passes into the flask, which ends with an end. The needle tip is formed by two asymmetric faces located at an angle to the longitudinal axis to form a right angle, the surface of which has a roughness corresponding to 7-8 purity classes. 8 ill.

Description

The invention relates to constructions of needles for sewing machines.

The aim of the invention is to expand the functionality of the needle by creating a relief with an increased degree of compression and range of selection.

In FIG. 1-4 show the construction of a needle of a sewing machine; Fig. 5 (a-e) - views of the resulting relief with an increased degree of compression and range of collection.

Figure 4 close-up shows a graphic image of the profile of a dihedral angle with a rough-grabbed surface located on the working part of the end of the sewing needle of our design. As can be seen from the drawing, in the axial section there is a left and asymmetric rights.

The type of rough-grasped surface is arbitrary.

The proposed construction consists of a rod, in which the groove 2 is located, in the lower part of the rod there is an eyelet 3 and

a tip that ends with a right asymmetry 5 and a left asymmetry 6. The upper part of the rod passes into a flask 7, which ends with an end 8.

The basis is a needle with dimensions: L 39 mm; H 33.9 mm; d 1.7 mm; model 0277-33. the design of the bulb is 0, the rod is 02, the tip is 02, The shape of the tip is round normal.

By grinding off a part of the tip surface and adjacent blunting, a left asymmetrical face formed at an angle to the longitudinal axis of the needle forms a dihedral right angle with the right asymmetric face at the top of the right angle with a displacement point at the apex of the right angle with a displacement interval and with a variable inclination angle in a clockwise direction.

The decisive indicators for performing a new function - creating a relief with an increased degree of compression and a range of suitability - is a dihedral right angle located on the end of the working part of the sewing needle with a rough-chain surface and volume (Л

00

go

With

moving at intervals, the value of which is oriented to the height of the left side, located at an angle to the longitudinal axis of the needle, and with a variable inclination of the angle in a clockwise direction.

It was experimentally established that the optimal values are the sizes of the dihedral right angle and its intervals of the parameters of the displacement point

at the peaks equal to "1 value of high

You left asymmetric face, located at an angle to the longitudinal axis of the needle, and the variable angle of inclination in the clockwise direction is 4-12 °. It is at these values that the needle, when puncturing, pulls the fabric threads into puffs with an increased degree of compression and a range of pressure-matching dihedral right angles with a rough-chain surface corresponding to a cleanliness class 7-8 located at the working end the sewing needle of our design, while the fabric is not injured in the process of piercing, i.e. it does not tear /

A description of the data at various values of the input quantities is illustrated in Figs. 6-8.

Option t (Fig.6).

The direction of displacement of the points of displacement at the apex of the angle from right to left through the axis of the needle. Three points of displacement at the apex of the corner with intervals: with values 1) - the displacement interval is equal to the height of the left asymmetric face, i.e. unit (symbol); interval

2 offsets with a value of 2) - equal to - one

tsy; with a value of 3) - the offset interval is - units.

| eez tilt angle clockwise. Option 2 (Fig.7 a, b, c),

a) The offset interval of the displacement point at the apex of the right angle is equal to the height of the left asymmetric face. A position with an angle of inclination of 4-12 ° is used for needles No. 60 No. 90. The angle value is constant 90 °.

b) The interval of displacement of the point of displacement2 at the top of the right angle is -

the heights of left ascension are perceptible. The reference number 4 with an angle of 4-12 ° is used for balls No. 100 No. 130.

c) The interval of displacement of the point of displacement at the apex of the right angle is equal to - the height of the left asymmetric face

Position b with an angle of 4-12 ° is used for needles numbered 140 N; 170.

When a point of a right angle is displaced at its apex, congruence is observed. Using elementary geometry,

a relationship was established between the value of H, the grind off of the left asymmetric face, used per unit when determining the interval of the point at the top of the right angle, the grind height h, Hi - the height of the right asymmetric face and the cross-section diameter d.

Fig. 8 is explained in table. 1.

V7

a2 c2 + b2;

from 2a

b V3

 ft - - UUb U. -

a 2 sin "i f l;

to ei,.

b V

Rough-chained surface characteristics in numerical data, in accordance with generally accepted standards, are given in table. 2.

Choosing the values of H, Hi, h, as well as a.

it is possible to obtain a relief with an increased degree of compression and range of accession without the participation of spool and shuttle threads. At various values of these values, the relief has individual characteristics.

The needle works as follows. When piercing, the strands of fabric are tensioned at the moment of pressing on the fabric with the working part of the end of the sewing needle,

on which there is a dihedral right angle with a rough-chain surface formed by closing by common sides in the rib (right asymmetry and left asymmetry); at the moment of thread tension

tissue is formed by tightening, which persists even after the puncture of the tissue is completed.

 Relief with an increased degree of compression and a range of collection without participation

bobbin and shuttle threads are created by alternating puncture sites, puncture lines and collection zones. With the decisive role of puncture lines, with their skillful combination and artistic variation, a pattern is created, varieties of which are shown in Fig. 5.

5 a - relief with an increased degree of compression and areas of collection. The pattern was obtained by piercing serpentine-shaped lines. Between the puncture lines, the compression is a continuous strip from the puncture line on both sides.

5 b - the pattern expresses randomness in the location of the puncture lines, enhanced cross pattern from the puncture lines, formed by warp and weft threads emanating from the puncture site, capturing the puncture line and peripheral zones that merge into a single common pattern.

5 c - the figure expresses the abundance of squares formed by pulling on both sides of the puncture lines. In other areas, a wave is to be found.

5 g - the figure expresses crucifix at the puncture sites of the strained warp and weft threads. Additional gaps are formed by warp threads between the puncture lines.

5 e - the figure expresses the coal-like formation of tightened tissue threads on both sides of the puncture lines while maintaining wave formation between the puncture lines and the puncture lines with an increased compression density.

5 e - the figure expresses the formation of a relief with an increased degree of compression and prefabrication zones with the main characteristic of a coal formation from puncture lines that emanates from one point radially.

The main characteristic of the relief formed by the needle of the sewing machine with two asymmetric faces is the pulling together of warp and weft threads in the form of triangles, angles emanating from the puncture sites and located on both sides of the puncture lines with additional wave formation in all zones, without the fate of spool and shuttle threads using a single layer of fabric. -

The characteristic of the material used for the relief is as follows.

1. Atlas, lining silk, nylon, lake, bologna, synthetic silk, staple, cotton.

2. Without using a pad or additionally a second layer of fabric.

The fabric obtained using the proposed needle design can be used in light industry for the manufacture of garments: jackets, raincoats, coats, blouses, suits, skirts, scarves, woolen hats, and in combination with other fabrics: relief, suede, fur, knitted as finishes.

Thus, the proposed design of the needle of the sewing machine allows, in addition to the usual function: connecting fabrics - to obtain a relief with an increased degree of compression (in the form of triangular formations from puncture lines) and a range in the collection zones, which allows expanding the assortment of manufactured products at minimal cost.

Claims (1)

SUMMARY OF THE INVENTION The needle of a sewing machine, made in the form of a rod with a point and an eye at one end and a bulb at the other, characterized in that, in order to expand its functionality by creating a relief with an increased degree of compression and range of fitting, it has two asymmetric faces forming a point located at an angle to the longitudinal axis of the needle and forming a dihedral right angle, the projection of the vertex of which lies on the left side, which is 1 / 3-1 of its maximum value, and the oscillations of the angle of inclination of the faces with they leave 4-12 ° from the set position, while the surface of the dihedral right angle has a roughness corresponding to 7-8 classes of cleanliness. Table 1 table 2 A Figure 1 F ill I I f I I and / № /) 5 (.) FIG. 2. d Riga 3 FIG. 5 q% / e6 OS 6 X ff0 five 7