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Warp tension monitoring method

A warp and tension technology, which is applied in textiles, textiles, papermaking, looms, etc., can solve the problems that operators cannot grasp the control time and cannot quickly adjust the thickness and thickness

Inactive Publication Date: 2006-03-08
TSUDAKOMA KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, on the loom, before the warp tension reaches the specified range, when the warp let-off control is carried out according to the warp tension value, the control time from the start of the loom to the warp tension reaching the specified range will be lost. Due to the different yarn types, states, and warp tension, the operator cannot grasp the control time
[0008] Therefore, the operator can only see the fabric with thick and thin sections after starting, and cannot determine the part woven within the above-mentioned control time, so it is impossible to quickly perform adjustments to suppress the occurrence of thick and thin sections.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0067] When the rotation angle of the main shaft 44 is, for example, every 10°, the warp tension control unit 58 will memorize the detected warp tension value T in the memory 54 (tension detection step).

[0068] The arithmetic unit 50 calculates a representative value of the warp tension value T every time one detection unit period Tu passes from the input warp tension value T (representative value calculation step). In this example, the representative value was used as the average warp tension value.

[0069] The detection unit period Tu is a period including the cycle period Ts. In other words, the detection unit period Tu is a period consisting of one or more cycle periods Ts in units of cycle periods Ts. In this embodiment, the detection unit period Tu is the same as the cycle period Ts.

[0070] The cycle period Ts is, for example, a total of 360° from when the main shaft rotates at an angle of 50° to when the angle after one revolution is 50°. However, the start peri...

Embodiment 1

[0086] In Embodiment 1, the average value of the warp tension values ​​in the detection unit period Tu is displayed on the display 56. Of course, at least the minimum or maximum value of the warp tension values ​​T in the detection unit period Tu may be displayed on the display 56.

[0087] image 3 It is a coordinate for displaying the time-series change of the warp tension value T on the display 56 with the curve L1.

[0088] The black dots C1 and C2 represent the maximum value and the minimum value of each detection unit period Tu as representative values ​​related to the tension of the warp yarn 12 . However, in the display 56, only the black dots of the maximum value or the minimum value may be displayed.

[0089] Figure 4 It is the coordinate of the warp tension value T when two consecutive cycle periods Ts are regarded as the detection unit period Tu. In the illustrated example, the maximum value and the minimum value of each detection unit period Tu are taken as re...

no. 2 Embodiment

[0097] The warp let-off control modes of the above-mentioned embodiments are often described as being the same during the operation of the loom, but this embodiment shows an example in which the warp let-off control mode is changed during the operation of the loom. That is, when the warp let-off control mode is changed in the order of arbitrary speed control, restraint control, and normal control after starting, for example, the representation of warp yarns before and after changing from each let-off control mode to another warp let-off control mode is memorized. An example of the history of the value will be described.

[0098] In this embodiment, there are three let-off control modes: random speed control, restraint control, and normal control.

[0099] Arbitrary speed control is control in which the output shaft of the output motor is rotated irrespective of the detected change in the warp tension value. The speed mode of the warp let-off speed is set in the setting device...

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Abstract

To give information to a worker for suppressing weaving bar defects formed during a prescribed period immediately after the start of a loom. The warp tension monitoring method detects the warp tension and monitors the detected tension of the warp. The monitoring method comprises a tension detecting step to detect the tension of the warp as a warp tension value, a representative value calculation step to calculate the representative value of the warp tension values detected during a unit detection period including a cycle period corresponding to the one rotation of a main shaft, a representative value storage step to store the representative value during the monitoring period from the time immediately after the start of the loom to the end of the period including one or more of the above detection unit periods, and a representative value displaying step to display the representative value stored in the representative value storage step.

Description

technical field [0001] The present invention relates to a warp tension monitoring method which detects warp tension and monitors the detected warp tension. Background technique [0002] During the weaving process of the loom, the rotation of the output shaft of the driving motor and the rotation of the main shaft are transmitted to the warp roller on which the warp yarn is wound and the cloth take-up roller on which the fabric is wound through the reduction gear to rotate them. The warp yarns are delivered by rotating warp yarn rollers. The output warp yarn is connected with the fabric at the fell. The fabric is wound on a cloth take-up roller. [0003] Such a loom stops the rotation of the warp roll and the cloth roll when the operation is stopped (refer to Patent Document 1: Japanese Unexamined Patent Publication No. 2003-201650). [0004] However, the reasons for the thick and thin sections, especially the parking stalls (weave defects) that accompany the stop of the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D49/06D03D51/06
CPCD03D49/10D03D49/12D03D51/08D03J1/02D03J5/24
Inventor 名木启一北村笑子
Owner TSUDAKOMA KOGYO KK