KR860001956Y1 - Latch needle in knitting machine - Google Patents

Abstract

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Description

Latch needle for knitting machine

1 is a side view of the latch needle according to the present invention.

2 is a plan view showing the latch needle of the latch is closed, the latch needle of Figure 1 in detail on another scale.

3 is a plan view corresponding to FIG. 2 as another embodiment of the latch needle of FIG.

4 is a plan view corresponding to FIG. 2 with the latch pressed against one sidewall of the slot.

5 is a cross-sectional view of the latch needle of FIG. 1, taken along line V-V of FIG. 1, and shown as another measure.

* Explanation of symbols for main parts of the drawings

1: 2 sinking 2: 1

3: Sleep 4: Latch Slot

5: latch 6: chimp

7: shaft 8: spoon

9: recessed part 10, 12: symmetry plane

11 external point 13 side wall

14: base

The present invention relates to a latch needle for a machine for making knitted fabrics having a latch pivotally supported on the needle, needle and latch slots.

One important prerequisite for the satisfactory function of the latch needle in a knitting machine or in a Maryas machine is that the needle is fully opened and closed during the knitting operation. Thus, the latch must be guided relatively accurately to the latch slot and the latch spoon facing the end of the hook must be aligned at that end.

However, in thread work, especially after long-term use, the latches are deflected laterally during closing during the knitting operation, and as a result, the latch needle becomes unusable as the latch is no longer open, and defects occur in the knitted fabric. .

Undesirable lateral deflection of the latch that prevents the latch from being correctly placed on the needle tip during the closing operation is, as is known, due to two different causes.

In order to ensure easy pivoting of the latch, the latch itself must have certain axial and radial play despite the exact shape and placement. For this reason, it is inevitable that the latch moves a certain amount toward both sides of the turning plane. Because of the length of the latch, the latch itself produces a significant lateral deflection at the free end of the spoon of the latch, even though this slight mobility, even with very small lateral forces acting on the latch.

In high-speed system knitting machines with corresponding plateau speeds for needle cylinders and living discs, significant Coriolis effects occur during the closing and opening movements of the latching needle causing high rotational speeds. The needle is pushed to the side and the latch needle is pressed against the latch slot wall located at the rear in the direction of rotation of the machine. This means that the latch needle is not only subjected to lateral loads but also increases the wear of the latch slot wall located at the rear in the rotational direction. For example, as a result of the reciprocation of the latch needle opening and closing more than 40 times per second in a conventional automatic knitting machine used for the manufacture of seam-free socks, the needle is worn on the latch slot wall and laterally spaced on the latch placed on the latch slot The amount is inevitably increased. After prolonged use of the needle, the play of the latch is inevitably increased, and as previously explained, the lateral deflection at the free end of the spoon of the latch increases, causing the spoon to latch away from the needle during the closing motion or through one side thereof. Pass through the bottom or side of the needle, and eventually the latch needle will fail.

It is an object of the present invention to provide a latch needle that ensures that the latch closes properly after long term use and that the latch does not reach the side or the bottom of the needle during the closing motion.

The present invention provides a latch needle for a knitting fabric making machine comprising a latch rotatably supported at a latch slot in a needle, needle and needle and having a free end for transporting a spoon suitable for cooperating with the needle. The spoon is inclined to one side of the needle with respect to the symmetry plane of the latch, and the lateral distance from the symmetry plane of the needle to the outer point of the spoon is less than half the thickness of the shaft.

The inclined position of the spoon of the latch is aligned with the cooperating contact surface of the spoon and the needle, particularly when the latch is pressed against the latch slot wall by lateral forces during knitting or during the manufacturing process, when the latch is pressed against the latch slot wall by the lateral force. The location is guaranteed. This is because the clearances in the latches held by the new latch pins are still small, and both the latch slot walls and the latches themselves are not worn, as well as the clearances that hold the latches after prolonged use, and also in the latches and latch slot walls. The same applies to the case where the free end of the spoon exhibits a slightly larger lateral deflection due to wear.

Since the lateral distance from the symmetry plane of the needle to the outermost point of the inclined spoon is less than half the thickness of the needle, the outermost point is not projected past the associated side of the needle. For example, in a circular knitting machine, the plates may be arranged side by side with the latch needle, and the latch needle may be prevented from rubbing against the side of the plate when the latch needle moves toward the plate, thereby preventing incidental wear.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The latch needle shown in the figure has a needle 1 to which a curved needle 3 is connected via a needle neck 2. The latch slot 4 is formed in the needle | tip 1, and the latch 5 is arrange | positioned so that it may turn in a slot about the horizontal needle pin 6. The latch 5 has an extended spoon 8 connected at its end. The needle head 3 is concave as shown in FIG. 5, and the spoon 8 of a suitable shape is couple | bonded with the recessed part 9. As shown in FIG.

As can be seen from FIGS. 2 to 4, the spoon 8 is inclined to one side of the needle 1 with respect to the symmetry plane 10 of the latch 5. The lateral distance A from the symmetry plane 12 of the needle to the outer point 11 of the spoon 8 is less than half the thickness B of the needle, which indicates that the outer point of the spoon 8 is the sidewall 13 of the needle 1. , Do not exceed 13a).

In the embodiment shown in Figs. 2 and 4, the spoon 8 is inclined clockwise, and in the embodiment shown in Fig. 3, the spoon 8 is inclined counterclockwise. Thus, by way of example, in a circular knitting machine, it rotates clockwise in the second and fourth embodiments, and in the opposite direction in the third embodiment.

As can be seen from the second and fourth degrees, the spoon 8 in the region of the base 14 is inclined to one side by a predetermined small angle α. Rounding may be angled or may be formed with a rather large radius. It is also conceivable to fundamentally draw the rounding down to the shaft 7 of the latch, but even in this case the rounding is present in the area remaining outside the latch slot 4 at all positions of the latch so that the latch is latched ( The possibility of sticking in 4) should be avoided.

If the latch needle shown in FIG. 2 is used in the bedroom cylinder of the circular knitting machine rotating clockwise as indicated by arrow 15, the latch 5 is latched slot 4 as shown in FIG. Is pressed by the lateral force generated as the shaft 7 with respect to the side wall 16 lying at the rear end in the rotational direction. However, the inclined position of the spoon 8 ensures that the spoon 3 covers the needle 3 so that it does not leave the needle 3 in the closed position.

The embodiments mentioned as described above all had concave needles 3. However, the present invention is also applicable to a latch needle having a concave latch portion regardless of the shape of the contact surface of the latch with respect to the needle.

Claims (2)

In a latch needle for a machine for making knitted fabrics having a latch pivotally supported on the needle, needle and latch slots, the latch spoon 8 has one side of the needle 1 with respect to the symmetry plane 10 of the latch 5. And the lateral distance A from the symmetrical surface 12 of the needle to the outer point 11 of the latch spoon 8 is less than half the thickness B of the needle. The latch needle (1) according to claim 1, characterized in that the latch spoon (8) is bent laterally by a predetermined angle α near the base (14) with respect to the plane of symmetry (10) of the latch (5).