JPH05186944A - Thread guide for circular knitting machine - Google Patents

Abstract

PURPOSE: To provide an improved thread guide for double-cylinder circular knitting machine which is equipped with a thread cutting device having a circular cutter. CONSTITUTION: The thread guide is provided with a forefront part 5 for supplying a thread to a needle 3 and is constituted to be swingable about a pivot 91. The forefront part 5 is secured to a tierod 6 of a piston of a pneumatic power cylinder 7 which is supported at a pivot guiding part. The forefront part 5 of the thread guide is provided with a cam 51, which is constituted to be mounted on a stopper means such as a ball 10 in all guided positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pivotally mounted thread guide having a foremost part for supplying thread to a needle designed to be installed in a double cylinder circular knitting machine.

[0002]

2. Description of the Related Art A yarn guide used in a double cylinder type circular knitting machine for manufacturing socks, as a rule, swings in a horizontal plane so that the yarn crosses a path of a needle and engages scissors. Is installed as. In order to carry out this movement, this type of yarn guide occupies a considerable amount of space and has the disadvantage that its manufacturing equipment is very complicated.

It is an object of the present invention to overcome these problems of the prior art and to provide an improved thread guide for a circular knitting machine with a thread cutting device with a circular cutter.

[0004]

According to the present invention, as described in the claims, the front part of the yarn guide is fixed to the connecting rod on the piston of the air cylinder installed in the rotating guide part. It is characterized by being. An advantage of the present invention is that the pneumatic means for controlling the yarn guide are directly incorporated therein and the conventional cam mechanism can be omitted. It is also important that the thread cutting device of the circular knitting machine has a circular cutter. Another advantage resides in that the pneumatic element is actuated by a magnet, which makes it suitable for installation in electronically controlled circular knitting machines.

The present invention will now be described in more detail based on the preferred examples of the yarn guide of the present invention shown in the drawings.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in the drawings, a known double cylinder circular knitting machine for sock production consists of an upper cylinder 1 and a lower cylinder 2 with a double-headed needle 3. A circular thread cutting cutter 4 is mounted on the upper end of the lower cylinder 2 and cooperates with an air nozzle and a stationary knife (not shown).

[0007] Normally all knit systems have multiple thread guides, but their operation is the same, so it is sufficient for the present invention to illustrate and describe only one of them. The actual thread guide consists of two parts. The foremost part 5 comprises a cam 51 to which is fixed a pin 52 having an eyelet 53 at its free end for carrying the yarn to the needle 3. The connecting rod 6 attached to the piston of the air cylinder 7 is screwed into the cam 51, and in practice, the connecting rod 6 constitutes a carrying means for the frontmost portion 5. The air cylinder 7 is fixed to a holder 8 pivotally supported about a pivot 91 provided on a stand 9.

Regardless of its position, the cam 51 is a recessed screw 11 screwed into a hole provided in the stand 9.
It always rests on a ball 10 supported on it. The stand 9 is attached to the support 13 by bolts 12. The air cylinder 7 is connected to a high pressure air source via a hose 71, and the air source is controlled by an electromagnetic valve or the like not shown.

When the yarn is supplied to the needle 3, high pressure air is supplied to the air cylinder 7, and the connecting rod 6 is maintained at the most advanced position. The lowermost surface of the cam 51 contacts the ball 10 so that the guide keeps the guide in the operative position against the bias of the spring 81 by the ball. When the supply of high-pressure air to the air cylinder 7 is cut off, the connecting rod 6 moves to the most retracted position, that is, the inoperative position, and the cam 51 rolls on the ball 10 and contacts the ball with its concave surface ( (Fig. 2). At the same time, due to this movement, the yarn guide, preferably the holder 8, is rotated about the pivot 91 by the urging force of the spring 81, and the eyelet 53 is moved from the engagement position with the needle to the inoperative position.

It goes without saying that some elements of the guide can be modified in various ways without affecting the relationship with the thread cutting means. For example, the ball 10 may be replaced with a stationary stopper. When the well-known mechanical thread cutting means of the double cylinder type circular knitting machine is used, the guide can be attached so as to be swingable in the horizontal plane.

[Brief description of drawings]

FIG. 1 is a side view of a guide in an operative position.

FIG. 2 is a side view of the guide in an inoperative position.

[Explanation of symbols]

 1 ... Upper cylinder 2 ... Lower cylinder 3 ... Needle 4 ... Thread cutting cutter 5 ... Front part 51 ... Cam 6 ... Connecting rod 7 ... Air cylinder 8 ... Holder 81 ... Spring 53 ... Eyelet 10 ... Ball 9 ... Stand 91 ... Axis

Claims (2)

[Claims] 1. A rotatably mounted thread guide used in a double cylinder type circular knitting machine, wherein a foremost portion (5) of the thread guide for supplying a thread to a needle is rotatably supported. A yarn guide characterized in that it is fixed to a connecting rod of an air cylinder (7) supported on a guide portion which is formed. 2. A cam (5) is provided on the frontmost part (5) of the thread guide.
Thread guide according to claim 1, characterized in that 1) is provided and the cam is arranged to rest on a stopper means such as a ball (10) in all guide positions.