JPH11100759A - Latch opener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a latch opener designed not to close latches opened by a pair of the subject openers during the retreating motion of knitting needles so as to surely open the knitting needle latches during set up and prevent drop stitches due to the spring back of the latches during a knitting operation. SOLUTION: This pair of latch openers 1a, 1b is so designed that, in a carrierless flat knitting machine 1, plate-like members 2a, 2b are extendedly disposed throughout the range of the cross direction of knitting for a knitted fabric, and the tips of the plate-like members 2a, 2b are situated on the moving loci of latches 11a, 11b for knitting needles 12a, 12b advancing from needle beds 3a, 3b on the side opposite to the above tips, respectively; in this pair of latch openers, brushes 17a, 17b, in particular, are provided over the entire range of the plate like members 2a, 2b so as to project on the side of the initial positions of the knitting needles 12a, 12b rather than the tips of the plate like members 2a, 2b, and also, the tips of the brushes 17a, 17b are situated over the range from the underside to the upper side of the opened latches 11a, 11b for the knitting needles 12a, 12b lying at the most advanced positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a latch opener for opening a latch of a knitting needle in a carriageless knitting machine.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 7-42053 discloses a latch in which a plate-like member is extended over the entire area of a knitted fabric in the knitting width direction in a carriageless flat knitting machine (flat knitting machine disclosed in Japanese Patent Publication No. 1-128555). Discloses an opener.
The above technique is preferable in that the latch is reliably opened by the plate-shaped member. However, during the retraction of the knitting needle, there is the disadvantage that the latch closes and does not catch the knitting yarn.

First, this point will be described with reference to FIGS. In FIG. 4, when the knitting needle 12b of the knitting needles 12a and 12b, for example, comes to the most advanced position, the tip of the latch 11b in the open state is at a predetermined position P1, and the latch 11b
Is the protrusion amount L1 from the plate-like member 2a of the latch opener.
(Approximately 0.5 mm). At this time, since the upper surface of the latch 11b is in contact with the tip of the plate member 2a, the latch 11b does not close.

However, in FIG. 5, while the tip of the latch 11b is retracted to the position P4, the latch 11b is
, And the amount of protrusion increases from L2 to L3 to L4. During this time, the latch 11b becomes free and easily closes. When the tip of the latch 11b reaches the position P4, if the latch 11b is open, thereafter, the running yarn feeder and the presence of the knitting yarn connected to the yarn feeder,
Since the movement of the latch 11b is restricted, the latch 11b
Does not close. However, the tip of the latch 11b is located at the position P4.
In some cases, the latch 11b may be closed by the vibration of the knitting needle 12b or the old loop. By the way, the position where the knitting needle 12b actually hooks the knitting yarn is at the position P5.
Becomes This phenomenon also occurs for the knitting needle 12a.

[0005] Therefore, the plate-like member 2a of the latch opener,
Knitting needles 12a, 12b with the tip of 2b facing as far as possible
Approaching the initial position (standby position) of the latch 11a,
The protruding amount of 11b is reduced. However, the knitting needles 12 on the same side (the lower needle bed) as the plate members 2a and 2b
The latches 11a and 11b of the plate members 2a and 2b
It is necessary to keep the plate-like members 2a, 2b out of the rotation range α of the latches 11a, 11b in order to prevent interference with b, and there is a limit to the range in which the amount of protrusion is reduced. In order to surely open the latches 11a and 11b, the knitting needles 12 are positioned with respect to the tip positions of the plate members 2a and 2b of the latch opener.
The most advanced positions of a and 12b are determined. In this case, the most advanced position is determined so that the amount of protrusion is about 0.5 mm.

In the above-described conventional technique, a brush is provided on the plate-like member 2b so that the latch 11b is not closed during the retreat of the knitting needle 12b on the same side as the plate-like member 2b. However, there is a problem that the latch 11a is closed during the retreat of the knitting needle 12a on the opposite side of the plate-like member 2b. This is because during the advance of the knitting needle 12a, a part of the bristles of the brush enter between the lower surface of the latch 11a and the main body of the knitting needle 12a,
This is because when the 2a retreats, the bristle causes the latch 11a to be raised.

On the other hand, Japanese Patent Laid-Open No. Hei 5-287563 discloses that
In a carriageless flat knitting machine, a latch opener in which a brush is installed over the entire area in the knitting width direction of a knitted fabric is disclosed. Even with that technique, the latch cannot be reliably opened because only the brush is used, and the latch that has been opened may be closed when the knitting needle is retracted due to the presence of the brush. That is, in order to open the latch, it is necessary to set the position of the brush so that the brush sufficiently contacts the latch. With this setting, as described above, a part of the bristles of the brush enters between the lower surface of the latch and the knitting needle body during the advance of the knitting needle, and when the knitting needle retreats, the bristle causes the latch to be raised, thereby causing the latch to move. There is an inconvenience of closing.

[0008]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to prevent a latch opened by a latch opener from closing when the knitting needle is retracted and to ensure that the knitting yarn is hooked, thereby preventing dropout. .

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a carrierless flat knitting machine in which a plate-shaped member is extended and arranged over the entire knitting width direction of a knitted fabric, and the tip of the plate-shaped member is advanced from an opposite needle bed. A latch opener positioned on a movement locus of a latch of a knitting needle to be formed, and in particular, a brush is provided over the entire area of the plate-shaped member so as to protrude from a tip of the plate-shaped member toward an initial position side of the knitting needle. The tip of the brush is provided between the lower surface and the upper surface of the open latch of the knitting needle in the most advanced position. This brush has an angle θ1 in the vertical direction with respect to the knitting needle movement direction.
= 8 degrees to 12 degrees.

[0010]

1 and 2 show a carriageless knitting machine 1 in which latch openers 1a and 1b according to the present invention are applied. The carriageless knitting machine 1 has a needle bed 3
a, a plurality of knitting needles 12a slidably provided on 3b,
12b, the knitting needles 12a, 1b at arbitrary plural positions in the knitted fabric knitting width direction of the needle beds 3a, 3b.
Actuator 1 such as linear motor for moving 2b forward and backward
8a and 18b, and a yarn supply device 19 that reciprocates along the needle beds 3a and 3b. And the control device 20
Actuators 18a, 18 based on a predetermined knitting plan
The operation is controlled while synchronizing the operation b with the reciprocating movement of the yarn supply device 19.

In such a carriageless knitting machine 1, the front latch opener 1a and the rear latch opener 1b have a symmetric structure. Each latch opener 1
a and 1b include plate members 2a and 2b. The plate-like members 2a and 2b are made of, for example, synthetic resin and formed in a belt shape.
Brackets 4a, 4b extending over the entire knitting width direction of the knitted fabric of the needle beds 3a, 3b and having the same length as this
It is provided in. At this time, the tips of the plate members 2a, 2b are located near the rotation range α of the latches 11a, 11b of the knitting needles 12a, 12b of the needle beds 3a, 3b on the same side.

The brackets 4a and 4b are fixed inside U-shaped holders 5a and 5b extending over the entire region in the knitting width direction. These holders 5a and 5b
Holder stands 6 erected at both ends of the needle beds 3a, 3b
It is connected to the upper ends of a and 6b and has a structure in which the inclination can be adjusted by the shafts 16a and 16b. As shown in FIG. 6, the holders 5a and 5b are replaced with U-shaped cross sections.
It may be shaped like a cross section T. In this case, the plate member 2a,
Since the strength of the holders 5a and 5b in the direction orthogonal to the direction 2b is increased, it is possible to reliably prevent the plate-like members 2a and 2b from bending by their own weight and interfering with the knitting needles 12a and 12b.

Further, each holder stand 6a, 6
b is an elongated hole 7a, 7b and a fastening bolt 9 on the needle beds 3a, 3b.
a, 9b, and the brackets 4a, 4b
The long holes 8a, 8b formed in the holders 5a, 5b are screwed together with the fastening bolts 10a, 10b. These elongated holes 7a, 7b, 8a, 8b allow the plate members 2a, 2a,
b is the optimal position for opening the latches 11a, 11b of the corresponding knitting needles 12a, 12b at its tip, that is, the needle bed 3a, which is on the opposite side of the front needle bed 3a and the rear needle bed 3b.
Latch 11 of knitting needles 12a, 12b advancing from 3b
The latches 11a and 11b are mounted so as to be adjustable on the movement trajectories of the latches 11a and 11b in the closed state.

Latches 11a, 1 of knitting needles 12a, 12b
1b is held at a predetermined rotation position by a spring (not shown). For example, knitting needle 12b
When the latch 11b is rotated toward the hook 15b, the latch 11b is held at a position forming a predetermined rotation angle from the upper end of the knitting needle 12b, that is, at a position slightly opened from a completely closed position. It has become. Also,
When the latch 11b is rotating toward the needle stem, the latch 11
b is held at a position forming another predetermined rotation angle from the upper end of the knitting needle 12b, that is, a position slightly closed from a completely opened position. Of course, a knitting needle that does not use a spring may be used.

The present invention is directed to each plate member 2.
Brushes 17a and 17b are provided on a and 2b. That is, the brushes 17a, 17b are provided over the entire area of the plate members 2a, 2b so as to protrude from the tips of the plate members 2a, 2b toward the initial positions of the knitting needles 12a, 12b. , 17b are connected to the open latches 1 of the knitting needles 12a, 12b in the most advanced position.
It is provided so as to be located between the lower surface and the upper surface of 1a and 11b. In particular, in the embodiment shown in FIG.
The distal ends of the latches 7a and 17b are provided on the upper surfaces of the latches 11a and 11b. Note that the brushes 17a, 1
The tip of 7b is the knitting needle 12 of the needle bed 3a, 3b on the same side.
a and 12b are located within the rotation range α of the latches 11a and 11b, but because of the brush structure, the latches 11a and 12b of the knitting needles 12a and 12b of the needle beds 3a and 3b on the same side.
The opening and closing of 11b does not become impossible, and does not have a significant effect.

Here, the vertical angle θ1 of the brushes 17a, 17b is set in the range of 8 ° to 12 ° with respect to the movement direction of the knitting needles 12a, 12b, and 10.5 ° is the most preferable angle. Become. Brushes 17a, 17b
In the horizontal direction is 10 degrees with respect to the knitting needle movement direction.
The angle is set in a range of degrees to 45 degrees, and 45 degrees is the most preferable angle. The brushes 17a and 17b are made of, for example, a row of bristles arranged in the knitting direction, the bristle material is nylon, the thickness is about 0.2 mm, and the plate-like member 2
The amount of protrusion of the brushes 17a, 17b from the tips of a, 2b is set to about 2 to 3 mm.

The brushes 17a and 17b are not limited to being composed of one row of bristles, but may be composed of two rows or more rows of bristles in the vertical direction. At this time, at least the ends of the hairs in the lowermost row are in contact with the open latches 11 of the knitting needles 12a and 12b in the advanced position as in the previous embodiment.
a, 11b are provided so as to be located between the lower surface and the upper surface, and the tips of the hairs in any row
a, 11b are provided so as not to be lower than the lower surface.

Next, the operation will be described with reference to FIGS. For example, when the knitting needle 12b moves forward and the tip of the latch 11b hits the brush 17a, the latch 11b starts to open. With further advance of the knitting needle 12b, the latch 11b
The plate-shaped member 2a is reliably opened by hitting the tip. In the most advanced position, the bristles of the brush 17a are in contact with the upper surface or the side surface of the opened latch 11b, and the latch 11b is kept in a closed state as shown in FIG. At this time, the protruding amount L1 ′ of the latch 11b from the brush 17a is
As in the conventional case, the distance is set to about 0.5 mm. FIG. 3 shows the movement trajectory of the tip of the latch when it is assumed that the latch is always open, as in FIG.
The vertical axis indicates the amount of advance from the initial position. next,
From this state, the knitting needle 12b starts retreating. At this time, since the hair does not enter between the latch 11b and the main body of the knitting needle 12b, the latch 11
b does not close.

Position of tip of plate-like member 2a and latch 11
The position P4 at which b does not close is the same as in the related art. Note that, in addition to the plate-like member 2a, the brush 17a
2 and 3, the most advanced position of the knitting needle 12b is set by the protrusion amount (2 to 3 mm) of the brush 17a.
It is lowered like so. That is, a part of the movement pattern of the knitting needles 12a and 12b set in the control device 20 in FIG. 1 is changed as shown by the solid line in FIG.
The most advanced position of the tip of P is from P1 to P1 '. Therefore, the amount of protrusion of the latch 11b from the brush 17a between the position P1 ′ and the position P4 is smaller than the conventional amount of protrusion. Note that the protrusion amount L1 ′ = L1. Further, the tip of the latch 11b is moved from the most advanced position to the position P4.
The time required to reach the site is also reduced. This means that, according to the prior art, it moves by the distance (P1−P4), but in the present invention, the movement amount is the distance (P1′−P4) as P1−P4.
This is because it is shortened by 1 '.

[0020]

As is clear from the above description, according to the present invention, the amount of protrusion of the knitting needle is reduced, the time during which the needle is protruded is shortened, and the fact that the latch becomes free is minimized. Thus, it is possible to prevent the latch from closing, and to prevent eye dropping.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire latch opener.

FIG. 2 is an enlarged side view showing a main part of a latch opener.

FIG. 3 is a motion trajectory of the tip position of the latch when it is assumed that the latch is in an open state.

FIG. 4 is an enlarged side view showing a main part of a latch opener in a conventional example.

FIG. 5 is a movement trajectory of the tip position of the latch when the latch is assumed to be open in a conventional example.

FIG. 6 is a side view of another attachment example of the holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carriage-less knitting machine 1a, 1b Latch opener 2a, 2b Plate-like member 2c Tip 3a, 3b Needle bed 4a, 4b Bracket 5a, 5b Holder 6a, 6b Holder stand 7a, 7b Slot 8a, 8b Slot 9a, 9b Fastening bolt 10a, 10b Fastening bolt 11a, 11b Latch 12a, 12b Knitting needle 13a, 13b Plate spring 141, 142 Surface 15a, 15b Hook 16a, 16b Shaft 17a, 17b Brush 18a, 18b Actuator 19 Thread supply device 20 Control device

Claims (2)

[Claims] 1. A carrier in which a plate-like member extends and is arranged over the entire region in the knitting width direction of a knitted fabric, and the tip of the plate-like member is positioned on the movement locus of a latch of a knitting needle that advances from an opposite needle bed. In a latch opener of a less flat knitting machine, the brush is provided over the entire area of the plate-shaped member so as to protrude toward the initial position side of the knitting needle from the tip of the plate-shaped member, and the tip of the brush is located at the most advanced position. A latch opener provided between the lower surface and the upper surface of the opened latch. 2. The latch opener according to claim 1, wherein the brush is provided at an angle θ1 in the vertical direction with respect to the knitting needle movement direction = 8 ° to 12 °.