SU1272526A1 - Needle,particularly,for devices for laying conductors in harness - Google Patents

Abstract

This invention relates to a process equipment for laying out wires in the manufacture of harnesses. The purpose of the invention is to improve reliability by eliminating damage to the wire. On the inner wall 4 of the end of the bevel 3 of the needle cylinder, on its inner wall 4, located on the opposite side of the bevel, the ball 5 is rigidly fixed. The size of the diameter of the ball 5 is not. It exceeds the differences in diameters of the inner cavity of the cylinder channel and the wire increased by the thickness of the needle wall, i.e. the ball 5 is fixed with the possibility of forming a groove for the passage of the wire. 6 Il. s (LU you ate:

Description

The invention relates to process equipment in the manufacture of electronic computing equipment and concerns devices for laying out wires in the manufacture of harnesses.

The purpose of the invention is to increase reliability in operation by eliminating damage to the wire.

FIG. 1 and 2 show the needle guide; in fig. 3 and 4 - successive stages of the needle together with the mechanisms of the device for the layout of wires in a bundle; in fig. 5 - placement of the needle ball; in fig. 6 shows section A-A in FIG. five.

The needle is made in the form of a cylinder 1 with a channel 2 and a bevel 3 at the working end. At the end of the bevel 3 in the channel of the working end of the cylinder on its inner wall, located on the opposite side of the bevel, the ball 5 is rigidly fixed, and the fastening can be made by welding, soldering or glue. Above the ball 5, an outlet channel 6 is formed, bounded by sections aS and ac, and from below by a surface 7, which is smoothly connected to the wall. Depending on the design of the mechanism, the segments in bevel 3 can be made a groove 8. The outer and inner edges of the bevel are rounded along the radius. The needle is used in the device for laying the wire 9 in a bundle containing a safety socket 10 with a window 11 in the side wall, a template 12 with holes 13 and 14, a rubber gasket 15.

The ball 5 is placed with a certain displacement of its center from the axis of the needle. This displacement and the size of the ball are determined from the provision of a groove (Fig. 6) for the passage of the wire 9, whose diameter is equal to dg (Fig. 5), and this groove (gap) is determined by the B-moment when the needle is in the upper position, t . in the process of laying the wire, and the wire is fed through a needle located above the window 11 in the nozzle 10. This gap must be larger than the diameter of the wire, which is possible under the condition

d, dj, + t,

d is the diameter of the ball; d, is the diameter of the internal cavity of the needle; t is the needle wall thickness;

those. the diameter of the ball does not exceed the difference between the diameters of the internal cavity and the wire, increased by the thickness of the needle wall.

The work of the needle in the composition of the device for the wire layout into a bundle occurs in the following 1M manner.

Previously, the needle of the cylindrical part is inserted into the safety tube 10, and the wire 9 to be inserted into the internal channel of the needle itself.

The whole cycle of the layout of the wires in the harness consists of three stages: fixing

first and second ends and direct styling. If the wire is damaged by the edges of the working end during fixing the first end of the direct installation does not occur,

since when fixing the first end the wire is in the inner cavity of the needle. The wire feed takes place when the working part of the needle passes through the hole 13 of the template 12 and the rubber gasket 15. Direct laying takes place in the needle position when its working part is in the safety fitting 10 over

window 11 so that the edges on the working

needle parts do not come into contact with the wire being laid. Damage to the wire is possible only if the second end of the wire (in the hole 14) in the device for laying the wires into a bundle is fixed, when an inlet is formed in the form of a loop GT (Fig. 3) and a section of wire 9a falls under the working part of the needle. This damaged area may enter further into the bundle, which is unacceptable.

Claims (1)

Due to the presence of a ball, this section of the wire moves downward from the top of the ball as the needle moves further down, and since the ball diameter is 3-6 times larger than the needle wall thickness, then by increasing the contact area, it is possible to protect the wire from mechanical damage, and the edges of the working part of the needle contact only part of the wire, since the edges themselves are mainly located above the end of the needle with the ball (Fig. 4). The contact of an insignificant part of the wire that does not have tension (since this part is previously shifted by the needle ball) has the character of sliding along the bevel of the rounded edges of the working part of the needle. In the same way, previously laid wires 95 are protected from mechanical damage, being in the working area above the template hole 14, in which the wire is fixed. A smooth connection of the output channel 6 with the internal cavity occurs through the surface of the as5 (figure 1) which contributes to the free without a need for moving the wire to the output channel. The installation of a ball in the channel of the working end of the needle contributes, in addition to the elimination of mechanical damage, to the formation of a loop in the form of a loop P. A loop in the device is formed by lifting a (specially for this purpose) and lowering the needle, the wire, which is lowered along with the needle, having the axial stability, forms a loop inlet.If you install the needle with a bevel 3 directed to the window 11 of the safety nipple 10, then at the end of the needle with a ball 264 refracts (in the direction of the window 11) and when the needle is further lowered, this refraction contributes to the formation of a loop (Fig. 3). Thus, a needle made in the form of a hollow cylinder with a spherical tip significantly increases the reliability of the wire-laying device. The invention, the Needle, mainly in devices for laying wires in a bundle, made in the form of a hollow cylinder with an oblique cut at the working end and with a ball located in the canape of the working end of the cylinder, so that Ensuring reliability in operation by eliminating damage to the wire, the ball is rigidly fixed on the inner surface of the wall of the cylinder channel with the possibility of forming a groove for the passage of the wire.