JPS61258070A - Overfeed apparatus of cloth tenter - 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 (Industrial Field of Application) The present invention relates to an overfeed device for a tenter for fabric, and the overfeed on the supply side is prevented by setting a target value for the weft thread density on the fabric delivery side. The ratio is automatically controlled.

(Prior Art) In a tenter for fabric, in which both edges of a long fabric are held by a tenter chain and run, hot air is blown onto both the upper and lower surfaces of the fabric to perform hot air treatments such as drying and heat setting. An overfeed roller driven by a motor via a continuously variable transmission is provided on the fabric supply side of the tenter chain, and by manually turning the speed ratio adjustment shaft of the continuously variable transmission, the overfeed ratio, that is, the overfeed roller can be adjusted by manually rotating the speed ratio adjustment shaft of the continuously variable transmission. It is known that the ratio between the circumferential speed of the tenter chain and the traveling speed of the tenter chain is set. The above-mentioned overfeed ratio is set based on experience according to the weft density determined in advance depending on the type of fabric, and then the weft density is measured on the fabric delivery side of the tenter after the start of operation, and the measured value and the above-mentioned The initial overfeed ratio was revised according to the difference from the target value.

(Problem to be solved by the invention) Conventionally, the speed ratio adjustment shaft of the continuously variable transmission for driving the overfeed roller was manually turned, so it was necessary to measure the weft yarn density on the feeding side of the fabric and then make corrections. There was a problem in that it took a long time to complete the process, and uncorrected fabric was produced during that time.

Further, when the weft density of the fabric supplied to the tenter fluctuates, it is not possible to correct the overfit ratio in accordance with the fluctuation.

This invention attempts to solve the above problems by automatically correcting the overfeed ratio.

(Means for solving the problem) An overfeed ratio measuring device 12 for measuring the overfeed ratio of the overfeed roller 1, and a fabric running device for measuring the running length of the fabric F transferred by the tenter chain 2. length measuring device 14 and the tenter chain 2
a weft density measuring device 15 for counting the number of weft threads per unit length of the fabric F on the fabric delivery side; and a reversible device for rotating the speed ratio adjusting shaft 7a of the continuously variable transmission 7 for changing the speed of the overfeed roller 1. A motor 11 and this reversible motor 11,
A controller 1 for controlling based on each output signal of the above-mentioned overfeed ratio measuring device 12 and weft yarn density measuring device 15 and a preset target value S of the weft yarn density.
3 is provided, the overfeed ratio Calculate the supply side weft density K before the measured portion reaches the overfeed roller by dividing by the measured value X of the overfeed ratio, and correct the overfeed by dividing the above target value S by this supply side weft density. A feed ratio Z is calculated, and the overfeed ratio of the overfeed roller 1 is changed to the corrected overfeed ratio Z by rotation of the reversible motor 11.

(Function) When the fabric tenter is operated by setting the target value S of the weft yarn density according to the type of fabric F in the controller 13, the fabric running length measuring device 14 starts measuring the fabric running length, and the fabric running length is measured. A signal is output for each travel length, this signal is input to the controller 13, the output signal of the controller 13 activates the overfeed ratio measuring device 12, and the overfeed ratio measuring device 12 measures the overfeed ratio X. This overfeed ratio X is stored in the controller 13. That is, the overfeed ratio is measured and stored every predetermined running length.

Next, when the measuring portion of the overfeed ratio , a signal is output from the fabric running length measuring device 14, and based on this signal, the weft yarn density measuring device 15 is outputted via the controller 13.
is activated, the number of weft threads is counted while the fabric F travels a predetermined length, and the weft thread density is measured. That is, the weft density Y of the portion fed to the tenter at the overfeed ratio X after passing through the tenter is measured.

Next, the above weft yarn density Y is inputted to the controller 13, and the ratio Y/X with the overfeed ratio X that is about to be stored in the controller 13 is calculated. The supply side weft yarn density K is calculated. Continuing b), the ratio S/K between the target value S and the supply side weft yarn density is calculated. That is,
A corrected overfeed ratio Z necessary for processing the fabric F having the weft density on the supply side with a tenter to bring the weft density to its target value S is calculated.

At this time, the overfeed roller 1 is rotating at the original overfeed ratio X is compared, a signal corresponding to the difference is input from the controller 13 to the reversible motor 11, and the reversible motor 11 is rotated in a direction that makes the difference zero, and
The overfeed ratio that changes due to this rotation is compared with the corrected overfeed ratio Z, and when the difference becomes zero, the reversible motor 11 is stopped and the overfeed ratio is set to the corrected overfeed ratio Z. Therefore, when the fabric F passing through the overfeed roller 1 after the setting change reaches the weft density measuring device 15 on the delivery side, the measured value of the weft thread density matches the target value S.

When the weft density of the supplied fabric F changes, the measured value of the weft density measuring device 15 on the delivery side changes in accordance with the change, and this measured value is compared with the target value S. The overfeed ratio will be automatically corrected.

In addition, the overfeed ratio is 500 to 500 for the running length of fabric F.
It is preferable to measure every 3,000 m, and if the measurement interval is less than 500 m, the number of line registers installed in the controller to store the measured values of the overfeed ratio increases, making it uneconomical. , on the contrary, 3
If the distance exceeds 000 m, the response speed will be slow.

(Example) In the drawings, F is a fabric, l is an overfeed roller, 2 is a tenter chain, 3 is a hot air processing chamber, 4 is a chain drive shaft, and the overfeed roller 1 is
Supply motor 5. The tenter chain 2 is driven via an input transmission mechanism 6, a continuously variable transmission 7, and an output transmission mechanism 8, and the tenter chain 2 is driven by a chain transmission mechanism 10,
Driven via a chain drive shaft 4 and a bevel gear (Ilii!! not shown).

The speed ratio adjustment shaft 7a of the continuously variable transmission 7 has a reversible motor 11 connected to the setting transmission mechanism 11a, and a measurement transmission Q12.
The overfeed ratio measuring device 12 is connected through a, respectively, and the reversible motor 11 and the overfeed ratio measuring device 12 described above are connected to the controller 13 by circuits 11b and 12b, respectively.

This controller 13 includes an overfeed ratio setting device 1
3a and a weft density setting device 13b, and a fabric running length measuring device 14 via a circuit 14a, and a circuit 15.
each connected to the thread density measuring device 15 via a,
The fabric traveling length measuring device 14 is connected to the drive shaft 4 via a length measuring transmission mechanism 14b. The weft density measuring device 15 is equipped with a light emitter and a light receiver, and is configured to count the number of weft threads while a predetermined length of fabric is running, based on the intensity of transmitted light or reflected light of the fabric.

In the above structure, the distance from the overfeed roller 1 to the weft density measuring device 15 is set to 10 m, the target value of the weft thread density of the fabric F is set to 50 threads/2.54C11, and the initial overfeed ratio X is set to 1.03. , and when the operation is started with the overfeed ratio and weft density measurement intervals set to 1 m, the first 10 m of fabric F is fed at an overfeed ratio of 1.03, and the overfeed ratio measuring device 12 is supplied every 1 m. The above-mentioned overfeed ratio

The leading edge of the fabric F fed at an overfeed ratio of 1.03 reaches the weft density measuring device 15, and the fabric running length measuring device 14
When the measurement length reaches 10 m, the weft density at the tip of the fabric F is measured. The measured value Y is 51 lines/2.54 CI
When I, this measured value Y is input to the controller 13, and the weft density K of the fabric F at the time of supply is 4 due to = Y/X.
It is calculated as 9.51, and this value is 49.51 pieces/2.5
4cII and the above target value 5=50/2.54, the corrected overfeed ratio 2 is calculated as 1.0098 by Z=50/49.51, and the reversible motor 11 is rotated to achieve this value. A point 1 m from the tip of the fabric F is fed with a corrected overfeed ratio Z = 1.0098, and the overfeed ratio at the above point is measured,
The first line register is rewritten with the measured value 1.0098. Do the same for 12m.

The overfeed ratios at points 13m, 14m, etc. are set to the corrected overfeed ratio Z, and as a result, the measured value of the weft yarn density at these points is 49.99 threads/2.5.
41, and a weft density matching the target value 5=50/2.54C11 is obtained.

The weft yarn density K on the supply side is the above value of 49.51 threads/2.
When the weft thread is controlled to 54 cm, the operation continues at the above-mentioned corrected overfeed ratio Z, and the weft density on the delivery side becomes 49.99 threads/2.54 cm. Then, if the weft yarn density changes at the position Lm from the tip due to the cause of is calculated, and the overfeed ratio is re-corrected to 1.0417 from the position of N+10 m, and as a result, the weft yarn density on the delivery side is restored to 50 threads/2.54C11.

(Effect of the invention) This invention measures the weft thread density on the delivery side of the tenter,
The weft density before feeding is calculated from this measured value and the known overfeed ratio when the measured portion of the fabric is fed to the tenter, and then an appropriate overfeed ratio is calculated from this weft density. Since the overfeed ratio is set based on the overfeed ratio, the time from when the weft density of the fabric is measured on the delivery side to when the overfeed ratio setting is changed is greatly shortened, and the Even if there is a change in thread density, the overfeed ratio setting is quickly changed, improving product quality.

[Brief explanation of drawings]

The drawing is a plan view of an embodiment of the invention. F: fabric, overfeed roller, 2: tenter chain, 3: heat treatment chamber, 4: drive shaft, 5: supply motor, 7: continuously variable transmission, 7a: speed ratio adjustment shaft, 9: chain motor , 11: reversible motor, 12 nitrogen feed ratio measuring device, 13: controller, 13a nitrogen feed ratio setting device, 13b: weft density setting device, 14
: Fabric running length measuring device, 15: Weft yarn density measuring device. Patent applicant Kyoto Kikai Co., Ltd. Agent Patent attorney Takeshi Sakano Ryoji Fuyoshida

Claims (1)

[Claims] [1] An overfeed roller is provided on the fabric supply side of a pair of left and right tenter chains running at a predetermined speed, and the overfeed roller is rotated by a motor via a continuously variable transmission. An overfeed ratio measuring device for measuring the overfeed ratio of the overfeed roller, and a fabric for measuring the traveling length of the fabric transferred by the tenter chain. A running length measuring device, a weft density measuring device for counting the number of weft threads per unit length of the fabric on the fabric sending side of the tenter chain, and a reversible motor for rotating the speed ratio adjustment shaft of the continuously variable transmission. , and a controller for controlling the reversible motor based on the output signals of the overfeed ratio measuring device, the fabric running length measuring device, and the weft yarn density measuring device and a preset target value S of the weft yarn density. The overfeed ratio Calculate the supply side weft density K before the measured portion reaches the overfeed roller by dividing by the measured value X of the feed ratio, and divide the above target value S by this supply side weft density K to calculate the corrected overfeed ratio. An overfeed device for a fabric tenter, characterized in that the overfeed ratio of the overfeed roller is changed to the corrected overfeed ratio Z by rotation of a reversible motor.