JPS59192751A - Loom driving method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loom operating method for changing the crank rotation speed (hereinafter referred to as rotation speed) without stopping the loom during weaving.

Conventionally, when weaving is carried out at a high rotation speed of 700 revolutions per minute or more using a fluid type shuttleless loom such as a water jet loom or an air jet loom, one of the warp threads is When fuzz occurs in any warp, it often induces fuzz in the warp threads adjacent to it, resulting in so-called concentrated fuzz. In such cases, 1 usually 5
Since ~10 warp yarns become fluffy yarns, so-called warp fluff switching is performed to switch them with normal warp yarns without fluff, and the most common position for this switching is between the backrest roller and the heald. 5. Since knots will be concentrated on the warp threads at the switched points, when the knots pass through heddles or reeds at high speed rotation of 9,700 times/minute or more, or at openings, etc., the warp threads may become interlocked or Friction with the heddles or reeds often causes knots to become untied or fuzz to occur again.For this reason, it is recommended to reduce the rotational speed of the loom until the warp threads where the knots are concentrated are woven. However, in order to do that, it is necessary to replace the motor pulley and room pulley, and to do that! l! This results in a decrease in weaving efficiency.
It also requires a considerable amount of manpower. .

In view of the above points, the present invention sufficiently prevents loose knots and the occurrence of fluff even when weaving in areas where warp knots are concentrated, without reducing the weaving operation rate or requiring a large amount of manpower. The object of the present invention is to provide a loom operating method that allows one continuous line of weaving from the crease.

That is, the present invention is a method of operating a loom, which is characterized in that the loom is rotated at a low speed until the warp yarns are woven in areas where the knots of the warp yarns are concentrated, and after the weaving is completed, the loom is immediately turned to high speed weaving rotation without stopping.

The configuration of the method of the present invention will be explained in detail below.

With high speed rotation of over 700 times/minute! I! In fluid-type shuttleless looms that weave, if fuzz does not occur in one warp thread during weaving, fuzz will be induced in the adjacent warp threads as described above, and many of them will become fuzzed yarns, causing concentration. Since fuzz is generated, the warp fuzz is carried out between the hackless roller and the heddle as described above.

This is because knots are concentrated on the warp threads at the switching point.

When weaving continues at high speed rotation of 700 times/min or more.

When a knot passes through a heddle or reed or during shedding motion, the knot may become untied due to friction between the warp threads or +g friction between the warp threads and the heddle or reed.

Or fuzz will reappear. To spin this.

In the method of the present invention, the weaving machine does not stop until the warp at the knot concentration point caused by changing the warp fluff is woven in as the weaving operation progresses, for example, 450 times per weaving.
Weaving is performed at a low speed of about 1 minute.

When the warp yarns at the knot concentration point are woven, the weaving speed is immediately changed to a predetermined high speed weaving rotation speed of 700 times/min or more. The means for changing the rotation speed include a method of changing the voltage supplied to the loom motor, a method of transmitting the rotation from the motor wheel to the room wheel using a continuously variable transmission, or a method of transmitting the rotation using a two-stage Clasoge transmission. , especially from high-speed rotation to low-speed rotation.

In both cases, the rotation speed can be easily and quickly changed from low speed rotation to high speed rotation by operating a switch or a lever during operation without stopping the vehicle. By adopting such a rotation speed change means, it is no longer necessary to stop the loom and replace the motor pulley and room pulley, which was required each time the rotation speed of the loom was changed depending on the fabric to be woven. It greatly contributes to improving the operating rate and saving an hour and manpower.

Since the loom operating method according to the present invention has a longer weaving time than one or more, the weaving operation rate is much better with the method of the present invention.

Also, compared to the conventional method, which causes secondary fuzz to recur.

In the case of the method of the present invention, the acceptance rate of gray fabric is also excellent, and it is a very excellent method from the point of view of quality.

Patent applicant: Unitika Co., Ltd. -72

Claims (1)

[Claims] (11) A method of operating a loom, which is characterized in that the weaving speed is kept at a low speed until the weaving is performed at the point where the warp knots are concentrated, and after the weaving, the weaving rotation is immediately switched to a high speed without stopping.