JPS5920776B2 - How to open warp threads in a jacquard machine for towel pattern weaving - Google Patents

Description

[Detailed description of the invention] The present invention relates to a jacquard machine for towel weaving.

Conventionally, in jacquard for towel pattern weaving, the towel weave itself usually consists of 3 picks to make one pile, A weave,
In pile organizations such as B organization, C organization IA' organization, B organization, C'organization;A'' organization, B' organization, C'' organization, etc.
A and C, A' jump, A' and C' are the same organization, and BB
Since 'B'' has related structures on the front and back sides of h, A', and A', respectively, A, A' can be used as a pattern paper saving device for towels.
, A', etc. are placed in the jacquard, first, use the first pick to make an opening for the tissue of A, (A', A', etc.), then make the same pattern without moving the pattern. In order to make the opening on the opposite side of the first pink using the patterned paper, the horizontal needle pressure contact mechanism or the lifting knife is changed, the second pick is operated, the conversion mechanism is returned to the initial state again, and the first pick is opened. A so-called paper pattern saving device for towels is installed, which can reduce the required number of paper patterns to one-third by moving the pattern paper for the first time after returning to the state and completing the third pink.

However, the number of revolutions has recently increased due to the use of rapier towel looms, and the conventional shedding method (single or middle shedding method) cannot keep up with the number of revolutions of a jacquard loom, so Jacquard is a full shedding method. is gradually becoming more and more used.

On the other hand, in the case of a towel jacquard pattern consisting of free curves such as a floral pattern, there was no problem with the full-opening method; Or, in a geometric pattern composed of vertical and horizontal lines, if we look at the changing state of the pile on a certain weft line,
For example, until now, almost all of the towel looms had only the odd-numbered pile warp threads woven on the front side, and only a very small number of even-numbered pile warp threads on the back side, but after the next weft line, most A situation occurs in which all the odd-numbered pile warp threads are woven on the back side, and a very small number of even-numbered pile warp threads are woven on the front side, and since it is fully open, in the case of continuous raising (or lowering), it becomes a jacquard belt. continues to occupy the raised (or lowered) position, and when the front and back conditions suddenly change as described above, the jacquard belt changes its position from raised to lowered and from lowered to raised, so it is inevitable that Sudden tension fluctuations also occur in the pile warp yarns, and towels with an appropriate pile length were woven with the optimal tension for the pile structure, but now due to the sudden change in pile tension, the pile length becomes particularly short on the conversion line. In some cases, the pile disappears, and the woven towel fabric is sometimes woven with horizontal grooves in the eye area, which is considered a defect in terms of appearance and quality.

The present invention has been made to solve the above-mentioned drawbacks, and will be described below with reference to the drawings.

In other words, while weaving the part of the pattern where the tension of the pile warp threads does not change suddenly, weaving is carried out using the full shedding method, and when several picks are removed at the point where the tension suddenly changes, the warp needles are moved according to the instructions of the jacquard pattern just before that. All fixed knives whose full opening movement was secured mechanically or electrically through the is moved to a position unrelated to the hook of the warp needle, and the warp needle, that is, the jacquard belt is moved in a state similar to the half-open method, thereby preventing the tension of the pile warp yarn from suddenly changing all at once.

That is, in the drawing, reference numeral 1 denotes a fixed knife supported in a notch 3 of a fixed knife side plate 2, and the head of the knife 1 fits into a recess 4a of a slide plate 4 and is regulated.

A pin 5 is fixed to the end of the slide plate 4,
The pin 5 is fitted into an upper forked portion 7a of a connector 7 that swings about a shaft 6.

Accordingly, by the horizontal movement of the slide plate 4, the fixed knife 1 performs a pivoting motion about the lower edge of the fixed knife 1 as a fulcrum, thereby controlling the function of the vertical needle, which will be described later.

Furthermore, two vertical needles provided separately from the vertical needle with a normal belt
A wire 9 is attached to the lower end of one of the vertical needles 8a and 8b of the book.
L whose upper end is fixed and whose other end pivots around the shaft 10a.
It is fixed to one end of the shape lever 11a, and the rods 12a, L
The shape bar 13a is connected to the end of a lever 15 for operating the connector 7 via a rod 14a.

The lever 15 is rotatable around a shaft 16, and a notch 15a for regulating the connector 7 is formed at the right end of the lever, and is always urged clockwise around the shaft 16 by a spring 17. .

Further, wires 9b are similarly fixed to the lower ends of the vertical needle 8a and another vertical needle 8b, and L-shaped bars 11b, rods 12b,
Connector 7 via L-shaped bar 13b10 and bolt 14b
It is connected to a second lever 18 for control.

The second lever 18 is pivotable around a substantially lever shaft 19 and is always urged counterclockwise by a spring 20, with the tip 18a of the second lever 18 in contact with the side surface of the connector 7.

The connector 7 is urged clockwise around the shaft 6 by a spring 21.

In the Jacquard machine described above, the fixed knife 1 is normally located at the solid line position as shown in the figure, and the vertical needles 8a+8b also form a full opening.

That is, when the vertical needle 8b is raised, unless the vertical needle 8b is pushed by the horizontal needle (not shown), and if there is a hole in the pattern paper, the lower hook F1 is at the solid line position, so 1 will fall on the knife. However, the vertical needle 8b does not go down.

When pushed by the horizontal needle, the lower hook comes off the fixed knife, so when 1 is lowered onto the knife, the vertical needle 8b is lowered.

Further, when the vertical needle 8a is lowered, if the vertical needle 8a is pushed by the horizontal needle, the vertical needle 8a will not rise even if 2 rises on the knife.

If the vertical needle 8a is not pushed by the horizontal needle, 2 will rise on the knife,
The vertical needle is raised by the engagement of hook F2 and knife 2.

In this way, a full opening opening is formed, but now, from several pinks before the tension fluctuation point, or just before that, the vertical needle 8a is raised by the command of the jacquard pattern paper, and the L-shaped bar 11a, rod 12a, A fixed knife control lever 15 is actuated via the L-shaped bar 13a10 and the end 14a.

That is, the louver 15 rotates counterclockwise around the shaft 16 against the spring 17 to the position indicated by the two-dot chain line, and the notch 15a at the tip of the louver is disengaged from the connector 7, and the connector 7 is moved to the shaft 6 by the spring 21. Rotate clockwise around , and reach the position shown by the two-dot chain line.

Therefore, as the connector 7 rotates, the forked portion 7a at the upper end of the connector moves to the right, and the slide plate 4 slides to the right via the pin 5, and the fixed knife 1 fitted into the notch 4a of the slide plate is moved to the right. The fixed knife 1 is fixed at the position indicated by the two-dot chain line by rotating the lower edge as a fulcrum.

That is, the fixed knife 1 is attached to the lower hooks F of the vertical needles 8a and 8b.
It takes a position unrelated to 1 and becomes a state similar to the half-open method.

At this time, the rotation of the connector 7 pushes the second lever 18 that comes into contact with the side surface of the connector, and the second lever 18 rotates around the shaft 19 to the position indicated by the chain double-dashed line, and the rod 14b,
The wire 9b is pulled down via the L-shaped lever 13b, the rod 12b, and the L-shaped bar 11b, and the vertical needle 8b connected to the wire 9b is pulled down.
Pull down to the base plate 22.

Therefore, when weaving a part of the pattern where the tension of the pile warp yarn does not suddenly change after passing through a point where the tension suddenly changes, the second lever 18 is moved in the opposite direction by pulling up the vertical needle 8b to the knife again according to the command from the pattern paper. Connector 7
is returned from the two-dot chain line position to the solid line position, the slide plate 4 linked to the connector 7 is returned to its original position (solid line position), the function of the fixed knife 1 is restored, a fully open shed is formed again, and weaving continues. be done.

As described above, according to the present invention, the shedding is performed in the full shedding method while the pattern part where the tension of the pile warp yarn does not suddenly change is being produced, and the jacquard yarn is opened several picks before or immediately before the part where the tension suddenly changes. The fixed knife, which had secured full opening movement through a series of mechanisms through the vertical needle movement, was rotated and tilted according to the instructions of the pattern paper, eliminating its function as a fixed knife, and the vertical needle was moved in a state similar to the half-closed method. In other words, since the jacquard belt is moved, there is no sudden change in position when the jacquard belt is raised or lowered, unlike in the past, so the tension of the pile warp yarns does not suddenly change all at once. , an appropriate tension is maintained in the pile structure, and a towel with an appropriate pile length can be woven.

As for the means for eliminating the above-mentioned function of the fixed knife, the device shown in the figure shows one example, and the fixed knife may be tilted, moved left and right, or moved up and down by other mechanical devices or electrically. Of course, it is possible to make it slide, and this does not depart from the essence of the present invention.

[Brief explanation of drawings]

The drawing is a schematic diagram showing an embodiment of an apparatus for carrying out the method of the present invention. 1...Fixed knife, 2...Knife side plate, 4...Slide plate, 7...Connector, 8at8b...Vertical needle, 15 .18・
·····lever.

Claims (1)

[Claims] 1. On a jacquard machine for towel pattern weaving, the part of the pattern where the tension of the pile warp yarn does not suddenly change is opened using the full shedding method by placing the fixed knife in a position related to the hook of the warp needle, and the pattern is opened a few picks before the part where the tension suddenly changes or From just before, all the fixed knives that ensure full shedding movement are moved to positions unrelated to the hooks of the warp needles, and the function of the fixed knives is eliminated, and the pile warp yarn is sheared in a state similar to the half-shedding method. A method for opening warp threads in a jacquard machine for towel pattern weaving, characterized in that: