JPH07138853A - Yarn nipper of flat knitting machine - Google Patents

Abstract

PURPOSE:To hold a knitting yarn by a strong holding force without fail while simplifying its structure. CONSTITUTION:This yarn nipper is set in the neighborhood of the feeder side of a yarn cutter for cutting a knitting yarn 10 continuing from the feeder existing at a waiting position and sending out the knitting yarn 10 to a knitted fabric, and is also equipped with the yarn hooks 12 and 13 having a hook part 16 at the top part, hook-driving members 14 and 15 such as motors for moving the yarn hooks 12 and 13 in the vertical direction, and an elastic member 28 for holding the knitting yarn 10 engaged with the hook part 16 at the top part of the yarn hook 12 or 13 by nipping it between the elastic member and the side plane of the yarn hook 12 or 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn gripping device for a flat knitting machine for temporarily holding the knitting yarn when the knitting yarn is cut.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. Hei 5-222652, a yarn holder 3 for holding a knitting yarn and drawing it to a predetermined position and a knitting yarn 5 drawn by the yarn holder 3 are cut. A knitting yarn gripping and cutting device of a flat knitting machine having a yarn cutter 4 has been proposed.
The yarn holder 3 moves up from a predetermined position, rotates the nip claws 13a and 13b, holds the knitting yarn 5, and moves down. After that, the cutter 4 moves up to cut the knitting yarn 5.

[0003]

However, in the case of the above-mentioned conventional technique, an elevating mechanism for the yarn holder 3, a rotating mechanism for the nip claws 13a and 13b, and an elevating mechanism for the yarn cutter 4 are required, which is structurally complicated. It had the drawback of being expensive. Further, the nip claw requires an operation such as opening and closing, and the mechanism is complicated and the operation reliability is not high.

The present invention has been made in view of the above problems of the prior art, and provides a yarn gripping device for a flat knitting machine which has a simple structure and can reliably hold a knitting yarn with a strong holding force. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION The present invention is provided in the vicinity of the yarn feeder side of a yarn cutting device that cuts a knitting yarn connected to a knitted fabric from a yarn feeder in a standby position for drawing out a knitting yarn. A yarn gripping device provided with a hook portion at the tip, a hook driving member such as a motor for vertically moving the yarn hook cook, and a yarn hooked on the hook portion at the tip of the yarn hook. The yarn gripping device of the flat knitting machine is provided with an elastic member that is sandwiched and held between the side face and the side face. The elastic member holds the knitting yarn and abuts the side surface of the hook portion with a biasing force that does not come off due to the tension of the knitting yarn. In addition, an inclined surface that is inclined toward the opening side of the hook portion is formed at the tip end portion of the yarn hook, and a protruding piece that protrudes from the opening portion of the hook portion is provided at the lower portion of the hook portion. Is.

[0006]

In the yarn gripping device of the flat knitting machine according to the present invention, the yarn hook is raised and the knitting yarn is hooked on the hook portion and lowered, and in the lowered state, the knitting yarn is sandwiched between the yarn hook and the elastic member. It is designed to be retained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be described based on. The yarn gripping device of the flat knitting machine of this embodiment has a knitting yarn 1 that is connected to a knitted fabric from a yarn feeder at a standby position on the side of a flat knitting machine (not shown) that guides the knitting yarn 10.
A pair of yarn hooks 1 provided below the 0 insertion position
2 and 13 and motors 14 and 15 which are hook driving members for moving the yarn hook 12.13 up and down. The yarn hooks 12 and 13 have the same shape and are symmetrically arranged in a staggered manner, as shown in FIG.
As shown in (B) and (C), the hook portion 16 is formed at the tip, and the tip edge is a slope 18 inclined toward the opening side of the hook portion 16. On the lower portion of the hook portion 16, a protruding piece 20 that protrudes laterally from the opening of the hook portion 16 is formed. Further, the knitting yarn 10 is provided on the inner upper portion of the hook portion 16.
Is formed with a recess 17. Further, a rack 22 is formed on one side edge of the yarn hooks 12 and 13, and a rack 22 is formed from the tip portion where the hook portion 16 is formed.
The side edge portion formed with is formed thick.

The yarn hooks 12 and 13 are mounted on the lifting guide 2
4 is provided so as to be vertically movable, and each rack 22 is engaged with a pinion 26 that is rotated by the motors 14 and 15. The yarn hooks 12 and 13 each have a pair of spring members 2 whose hook portions 16 are elastic members in the lowered position.
It is elastically sandwiched by 8. This spring member 28 is
The yarn hooks 12 and 13 are fixed to the frame portion 30 of the flat knitting machine provided with the bolts 32 so that the knitting yarn 10 is held between the hook portion 16 and the knitting yarn 10 and does not come off due to the tension of the knitting yarn 10. It is in contact with the side surface of the hook portion 16 by the urging force.

In the vicinity of the yarn hooks 12 and 13,
A cutter 34, which is a knitting yarn cutting device, is provided on the knitted fabric side. The cutter 34 comprises a fixed blade 35 and a movable blade 36. The movable blade 36 is fixed to a swing member 37, and the swing member 37 is swingably provided around a swing shaft 38. The swing member 38 is connected to the motor 42 via the link mechanism 40. The link mechanism 40 is
It is composed of an interlocking member 43 and an L-shaped lever member 44, one end of the interlocking member 43 is connected to one end of the swinging member 37, and the other end of the interlocking member 43 is connected to one end of the lever member 44. There is. The corner portion of the lever member 44 is fixed to the rotation shaft 45 that is rotated by the motor 42, and the other end portion of the lever member 44 is biased by the coil spring 46 so as to rotate in the counterclockwise direction in FIG. There is.

The operation of the yarn gripping device of this embodiment is such that when the knitting yarn 10 is first gripped, the yarn hooks 12 and 13 are
The motors 14 and 15 rotate from the lower position of the yarn hooks 12 and 13 indicated by the two-dot chain line in FIG. 1, and the pinion 26 and the rack 22 cause the yarn hooks 12 and 13 to move.
Rises. Then, the knitting yarn 10 engages with the hook portion 16 of the yarn hooks 12 and 13 at a position shown above in the yarn hooks 12 and 13 indicated by the two-dot chain line in FIG. Here, when the yarn hooks 12 and 13 rise, the knitting yarn 10 comes into contact with the slope 18 at the tip thereof, the knitting yarn 10 slides along the slope 18, and the yarn hooks 12 and 13 rise to cause the knitting yarn 10 to rise. Comes into contact with the protruding piece 20 and hooks 16
The knitting yarn 10 slips into the inside. After that, the motors 14 and 15 reversely rotate, the yarn hooks 12 and 13 descend via the pinion 26 and the rack 22, and the knitting yarn 10 engages with the recess 17 of the hook portion 16 and is pulled down. Then, the yarn hooks 12 and 13 descend to the position shown by the solid line in FIG. 1 and stop. In this state, the knitting yarn 10 is sandwiched between the hook portions 16 of the yarn hooks 12 and 13 and the spring member 28, and is reliably held at that position.

In this state, the movable blade 36 of the cutter 34 is in an open state, and the knitting yarn 10 pulled down by the yarn hooks 12 and 13 is sandwiched by the spring member 28, and the movable blade 36 and the fixed blade 35. Located between and. Then, the motor 42 operates, and the movable blade 36 swings clockwise in FIG. 3 through the link mechanism 40 against the biasing force of the coil spring 46, and cuts the knitting yarn 10. As a result, the knitted knitted fabric is separated from the knitting yarn 10.
The movable blade 36 swings to the original open position by the coil spring 46, and the knitting yarn 10 held by the hook portion 16 and the spring member 28 is transferred to the next knitting operation.

According to the yarn gripping device of this embodiment, the yarn hooks 12 and 13 can catch the knitting yarn 10 and hold it in the lower position only by performing the raising and lowering movement which is the minimum required movement. It is a very simple configuration,
The knitting yarn 10 can be reliably held. In particular, since the inclined surface 18 is formed at the tip of the yarn hooks 12 and 13 and the protruding piece 20 is provided below the hook portion 16, the knitting yarn 1
0 can be reliably engaged with the hook portion 16, and the operation thereof has extremely high reliability. Also,
It goes without saying that the yarn hooks 12 and 13 of the yarn gripping device of this embodiment may be operated simultaneously or separately.

The yarn gripping device of the present invention may be provided only on the yarn hook 12 side in the above embodiment, as long as the yarn hook pulls the knitting yarn to the holding position and the yarn hook and the elastic member sandwich the knitting yarn. Further, in addition to the elastic members provided on both sides of the yarn hook, the elastic members may be provided on only one side, and even an elastic member on only one side may have an urging force capable of holding the knitting yarn against its tension. . Further, a plurality of elastic members may be provided on each side of the yarn hook to hold the knitting yarn.
Further, as the hook driving member for driving the yarn hook, a solenoid or a cylinder may be used in addition to the motor, and various actuators can be used.

[0014]

The yarn gripping device of the flat knitting machine of the present invention can surely hold the knitting yarn at a predetermined position only by the raising and lowering operation of the yarn hook, and does not require any other holding mechanism or the like. Moreover, the operation is reliable. Moreover, the structure is simple, the cost is low, and the reliability and durability are high.

[Brief description of drawings]

FIG. 1 is a front view of a yarn gripping device according to an embodiment of the present invention.

FIG. 2 is a right side view of the yarn gripping device according to the embodiment of the present invention.

FIG. 3 is a front view of the cutter of the yarn gripping device according to the embodiment of the present invention.

FIG. 4 is a front view (A), a right side view (B), and a sectional view taken along the line AA (C) of a yarn hook of a yarn gripping device according to an embodiment of the present invention.

[Explanation of symbols]

 10 Knitting yarn 12,13 Yarn hook 14,15,42 Motor 16 Hook part 18 Slope 28 Spring member

Claims (3)

[Claims] 1. A yarn gripping device provided in the vicinity of the yarn feeder side of a yarn cutting device that cuts a knitting yarn connected to a knitted fabric from a yarn feeder at a standby position for leading out a knitting yarn, and a tip end thereof. Provided with a yarn hook having a hook portion in the portion, a hook driving member for vertically moving the yarn hook cook, and an elastic member for holding the knitting yarn caught on the hook portion at the tip of the yarn hook by sandwiching it with the side surface of the yarn hook. A yarn gripping device for a flat knitting machine. 2. A sloped surface that is inclined toward the opening of the hook is formed at the tip of the yarn hook, and a projecting piece that projects from the opening of the hook is provided at the lower portion of the hook. The yarn gripping device of the flat knitting machine according to claim 1, wherein 3. The flat knitted fabric according to claim 1, wherein the elastic member is in contact with the side surface of the hook portion with a biasing force that holds the knitting yarn and does not come off due to the tension of the knitting yarn. Machine thread gripping device.