DE3043362C2 - Loop forming device for a knitting machine - Google Patents

Description

The invention relates to a loop forming device as described in the preamble of claim 1 described type.

In a known knitting device of this type according to GB-PS 12 40 065 there is from elastic rubber-like material supported stop of the damping elements from a ball, whose Mass is relatively high compared to that of the stitching member. Because of the comparable Elasticity of the shaft of the stitch-forming member and the ball, this is hardly deformed, and also not the movement of the loop forming member following moved into the rubber-like material, so that a practically undamped braking of the loop forming organ takes place. The resulting compressive stresses propagate through the shaft and often lead to breakage of the loop-forming organ, mostly in the area of the hook.

In the known device, the rubber-like material is inserted into a recess of a lock part and held by an adjusting screw. The assembly and adjustment is cumbersome and does not pose a problem without further ado, the desired function of the damping element is guaranteed.

The aforementioned GB-PS shows further devices for damping the movement of the loop-forming members; in which a metallic stop is provided with a spring formed from metal. The damping effect such arrangements is extremely small.

The invention is based on the object of developing the knitting device of the generic type in such a way that that the impact stress upon impact of the loop forming member on the damping element is better damped and a simple assembly that does not affect the damping properties is possible is

This object is achieved by the features specified in the characterizing part of claim 1.

Since in the loop formation / device according to the invention the stop consists of a thin metal plate and is only supported on one side of the socket, it gives way very strongly on impact of the loop forming element and is still leading during the loop forming element against the stop pushes the impact energy into the rubber-like material, so that the Impact energy is relatively strongly absorbed. Because the rubber-like material turns into a U-shaped Version is located, which includes all essential components of the damping element as an aggregate, is a simple assembly possible, in which no manipulations are required that affect the damping properties could affect.

Preferred developments of the loop forming device according to the invention are the subject of the claims 2 to 4.

Exemplary embodiments of the invention are explained below with reference to the drawing. In this shows

F i g. 1 part of a first embodiment of a loop forming device,
FIG. 2 the section 11-11 from FIG. 1,
3 shows part of a second embodiment of a loop forming device,

F i g. 4 the section IV-IV from F i g. 3,
F i g. 5 the arrangement of elastic damping elements in the lock system,

F i g. 6 shows, in perspective, a one-piece embodiment of the thin metal plate and the socket and

F i g. 7 shows the reception of the elastic damping element from FIG. 6 in the groove of a lock part.

A loop forming device of a knitting machine as shown in FIG. 1 to 4 has knitting organs 1, for example in the form of latch needles; a lock system consisting of an upper part 2 and a lower part 3 is formed and for the vertical displacement of the stitch-forming members 1 in the grooves a needle bed 4 of the knitting machine is intended contains elastic damping elements 5, which the loop forming organs 1 contact and forcibly stopping the loop-forming elements 1 in a technologically prescribed height are determined.

The elastic damping elements 5 can come into contact with the feet 6 of the loop-forming elements 1 come as shown in FIG. 1 and 2, or with end pieces 7 of the knitting organs, such as this in FIG. 3 and 4 is illustrated. The elastic damping elements 5 (Fig. 5) are both in the lower Part 3 as well as in the upper part 2 of the lock system at the points of collision of the stitch-forming organs 1 arranged with them, being at the points where the elastic damping elements 5 to be attached are, in parts 2 and 3 (F i g. 1, 2) or a part 8 (F i g. 3 and 4) grooves 9 are made.

Each damping element 5 has a socket 10, an elastic rubber-like material 11 and a thin one Metal plate 12 (Fig. 6,7).

The socket 10 has a U-shaped shape, in the cavity of which the elastic rubber-like material 11 is accommodated is. The mount 10 with the rubber-like material 11 accommodated in it is in the grooves 9

of parts 2 and 3 of the lock system are arranged so that their open part faces the loop-forming element 1 is. The thin metal plate 12 is on the elastic rubber-like material 11 on the Kont.iktseite with the stitch forming members 1 attached so that they the rubber-like material 11 against a direct Contact with the stitch-forming organs ί protects and in this way secures it against destruction.

The thin metal plate 12 is formed straight or curved.

The thin metal plate 12 is cantilevered; H. with one end attached to the socket 10 or in one piece executed with the socket 10, as shown in FIG. 6 is shown. Between one of the side faces of the There is a gap 15 between the socket 10 and the plate 12, so that the thin metal plate 12 has a free end 16 which rests freely on the elastic rubber-like material 11. The thin metal plate 12 is in It tapers towards its free end 16, as shown in FIG. 6 and 7 is shown.

(G F i. 7), the thickness of the metal plate 12 is half as large as the thickness of the loop-forming member 1. In addition, the metal plate 12 is arranged in relation to cam track at an angle ", which amounts to 0 ° to 30 °.

The loop forming device of the knitting machine works as follows:

The parts 2 (Fi g. 1 and 2) and 3 of the lock system move the loop forming members 1 in the grooves of the needle bed 4 at the foot 6, which protrudes from the grooves of the needle bed 4, so that they back and forth perform the movement required to form the stitch. When the foot collides 6 or the end piece 7 of the loop forming element 1 with the elastic damping element 5, for example after the expiry of part 2, the metal plate 12 and the elastic rubber-like underneath it Material 11 deformed. The kinetic energy of the loop-forming element 1 is absorbed here. If the Plate 12 made of steel and its thickness is at most half as great as the thickness of the mesh forming member 1, there are no longitudinal deformations of the loop forming member 1, so that no shock wave occurs can, which would cause the destruction of the working end of the loop-forming member 1.

Tests have shown that the use of the loop forming device according to the invention is a Operation of the knitting machine with a linear speed of the needle bed of 3 m / sec in the absence of one impact-induced destruction of the needles and without wear of the wedges during a prolonged period of operation in the order of magnitude of about six months enables.

For this purpose 2 sheets of drawings

Claims (4)

Patent claims: 1. Loop forming device for a knitting machine, with a lock system for displacement the loop forming members (1) in the grooves of the needle bed of the knitting machine, and with in the Lock parts arranged in sections of the collision with the stitch-forming members (1), the stitch-forming members (1) contacting damping elements (5), which are one of elastic rubber-like material (11) supported metallic stop, characterized by a U-shaped, the rubber-like material receiving socket (10), on one of which is free Leg on the contact side with the loop forming element \ i) the stop as a thin metal plate (12) is cantilevered, the free end of which rests on the elastic, rubber-like material. 2. Mesh forming device according to claim 1, characterized in that the thin metal plate (12) is made in one piece with the socket (10). 3. Mesh forming device according to claim 1 or 2, characterized in that the thin metal plate (12) is curved. 4. Stitching device according to one of claims 1 to 3, characterized in that the thin metal plate (12) is arranged with respect to the lock track at an angle λ of 0 to 30 °.