JP3171936B2 - Yarn tension detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the tension of a warp sheet wound on a beam or a warp sheet unwound from a beam in a weaving preparation machine such as a warp sizing machine, a beam unwinding machine or a warping machine. About.

[0002]

[Prior art]

First Conventional Example As shown in FIG. 4 (or Japanese Utility Model Publication No. 50-30436), a yarn tension detecting device in a winding section of a warp sizing machine or a beam rewinding machine has a reed 1 and a length measurement. The tension detector 5 is configured to sequentially pass through the roller 2, the feed roller 3, and the tension detection roller 4 and to be wound around the beam B, and to detect a component of the force applied by the warp sheet y to the tension detection roller 4 in a certain direction.
Is provided.

Second conventional example In the yarn tension detecting device of the first conventional example, as shown in FIG. 5, the warp sheet y passing through the tension detecting roller 4 passes through the guide roller 19 before being wound up by the beam B. It has a configuration.

[0004]

However, in the yarn tension detecting device of the first conventional example, the warp sheet y is
As the diameter of the wound yarn is increased by winding
Since the direction of the force exerted by the warp sheet y on the tension detecting roller 4 moves, a detection error occurs.

[0005] Recently, in a weaving preparation machine, a large beam in which the diameter of the flange is larger than the diameter of the barrel and the winding layer is thicker is used.

When such a large beam is used, the amount of movement of the warp sheet y in the direction of the force exerted on the tension detecting roller 4 is large, so that the detection error becomes large.

In the yarn tension detecting device of the second conventional example,
Since the direction of the force exerted on the tension detecting roller 4 by the warp sheet y is constant irrespective of the winding diameter of the beam B, no detection error occurs.

However, since the guide roller 19 is provided between the tension detection roller 4 and the beam B, the warp path from the tension detection roller 4 to the beam B is long. Further, in the course of the warp path, each warp of the warp sheet y comes into contact with the guide roller 19, so that the warp rolls on the guide roller 19 based on the twist or twist. Therefore, the tension detecting roller 4
The arrangement of the warp sheet y extending from the beam to the beam B is disturbed.

As a result, the tension of the warp sheet cannot be accurately detected without disturbing the arrangement of the warp sheet between the tension detecting roller and the beam.

An object of the present invention is to solve the above-mentioned conventional problems.

[0011]

According to the present invention, there is provided a tension detecting roller which passes before or after a warp sheet is wound on a beam and unwound from the beam. In a yarn tension detecting device having a configuration in which the direction of the force exerted by the warp sheet on the tension detecting roller is moved and provided with a tension detector for detecting a component of the force exerted on the tension detecting roller by the warp sheet in a certain direction, the beam A winding diameter detection device for detecting the winding diameter is provided, and a function setting device for obtaining a tension correction signal from a winding diameter signal output from the winding diameter detection device using a relational expression set in advance is provided. A yarn tension detecting device comprising a tension correcting device that corrects the tension output by the tension detector with the output tension correction control signal.

[0012]

In the yarn tension detecting device according to the present invention, an error occurs in the tension output from the tension detector based on the increase or decrease in the diameter of the wound yarn of the beam. The tension correction signal is obtained from the winding diameter signal output by the winding diameter detection device, and the tension output by the tension detector is corrected by the tension correction signal.

[0013]

According to the yarn tension detecting device of the present invention, an error is generated based on an increase or decrease in the diameter of the winding of the beam. The tension output from the tension detector is corrected based on the diameter of the winding of the beam. Unlike the first conventional example, the tension is accurately detected.

Also, unlike the second conventional example, there is no need to provide a guide roller between the tension detecting roller and the beam in order to eliminate an error due to an increase or decrease in the diameter of the winding thread of the beam.
The arrangement of the warp sheet between the tension detecting roller and the beam is not disturbed.

As a result, the warp sheet tension can be accurately detected without disturbing the warp sheet arrangement between the tension detecting roller and the beam.

[0016]

【Example】

1st Example (see FIGS. 1 and 2) This example is used in a winding section of a warp sizing machine or a beam rewinding machine.
This is a yarn tension detecting device that detects the tension of a warp sheet wound around a loom beam.

As shown in FIG. 1, the winding section has a configuration in which the warp sheet y is sequentially wound through the reed 1, the length measuring roller 2, the feed roller 3 and the tension detecting roller 4 and wound into a beam B.
A tension detector 5 is provided for detecting a component of the warp sheet y exerted on the tension detecting roller 4 in a certain direction.

As shown in FIG. 1, the feed roller 3 is connected to a line drive motor 7 through a transmission mechanism 6, and the transmission mechanism 6
And a warp speed detecting device 8 for detecting the running speed of the warp sheet y.

As shown in FIG. 1, a shaft for supporting and rotating the beam B is provided with a beam drive motor 1 via a transmission mechanism 9.
0, and a beam rotation detector 11 for detecting the rotation of the beam B is connected to the transmission mechanism 9.

The warp speed signal output by the warp speed detector 8 and the beam speed signal output by the beam speed detector 11 are input to a divider 12 as shown in FIG. The signal is divided by the rotation speed signal and converted into a winding diameter signal. That is, the warp speed detecting device 8, the beam rotation speed detecting device 11, and the divider 12 constitute a winding diameter detecting device for detecting the winding diameter of the beam B.

The winding diameter signals output from the winding diameter detecting devices 8, 11, and 12 are input to a function setting device 13. In the function setting device 13, a relational expression for obtaining the tension correction signal from the winding diameter signal is set in advance, and the tension correction signal is obtained from the winding diameter signal using the relational expression.

In the winding section of this embodiment, when the warp sheet y is wound around the beam B while keeping its tension at a constant value T,
As shown in FIG. 2, the detection value t output from the tension detector 5
Is smaller than the actual value T at the beginning when the winding diameter D of the beam B is the minimum, gradually approaches the actual value T as the winding diameter D of the beam B increases, and matches the actual value T. As the winding diameter D of B increases, it gradually becomes smaller than the actual value T, and becomes considerably smaller than the actual value T at the end when the winding diameter D of the beam B is maximized.

Accordingly, a value obtained by dividing the actual value T of the tension by the detection value t of the tension detector 5 is defined as a tension correction rate A. As shown in FIG. 2, the tension correction rate A is larger than 1 when the winding diameter D of the beam B is the minimum, and gradually approaches 1 as the winding diameter D of the beam B increases, and becomes 1. Thereafter, the diameter gradually increases from 1 as the winding diameter D of the beam B increases, and becomes considerably larger than 1 when the winding diameter D of the beam B becomes maximum.

The function setting device 13 stores the tension correction rate A, which is a function of the winding diameter D of the beam B, in advance in the form of a mathematical table or equation as a relational expression for obtaining a tension correction signal from the winding diameter signal. Remember.

The tension correction signal output from the function setting device 13 is input to a tension correction device 14 as shown in FIG.
The detected value t output from the tension detector 5 is input to the tension correction device 14. In the tension correction device 14, the actual value T of the tension is obtained by multiplying the detected value t of the tension detector 5 by the tension correction rate A of the tension correction signal, and the actual value T is displayed on the tension display 15. .

As shown in FIG. 1, the actual value T of the tension obtained by the tension corrector 14 is input to a tension controller 16 and compared with a value set in a tension setter 17 in advance. If there is a difference between the actual value T and the set value, the rotation speed of the line drive motor 7 or the beam drive motor 10 is increased or decreased according to the difference to adjust the tension of the warp sheet y, and the actual value T of the tension is set. To the set value.

In the yarn tension detecting device of the present embodiment, an error occurs in the tension t detected by the tension detector 5 based on the increase or decrease in the diameter D of the winding of the beam B. Since the correction is performed based on the tension, the tension is accurately detected.

Further, since no guide roller is provided between the tension detecting roller 4 and the beam B to eliminate a tension detection error based on the increase or decrease of the winding diameter D of the beam B, the warp between the tension detecting roller 4 and the beam B is not provided. The arrangement of the sheet y is not disturbed.

Second Embodiment (see FIG. 3) This embodiment is a yarn tension detecting device for detecting the tension of a warp sheet unwound from a warping beam in a rewinding section of a warp sizing machine.

As shown in FIG. 3, the rewinding section passes through the reed 21, the tension detecting roller 22, the feed roller 23 and the guide roller 24 to sequentially pass through the warp sheet y unwound from the beam B. And a tension detector 26 for detecting a component of the warp sheet y exerted on the tension detecting roller 22 in a certain direction.

As shown in FIG. 3, the shaft that supports and rotates the beam B is connected to a beam drive motor 28 (or a braking device) via a transmission mechanism 27.

The feed roller 23 is connected to a line drive motor 30 via a transmission mechanism 29, as shown in FIG.

As shown in FIG. 3, as in the previous example, a warp speed detecting device 8, a beam rotation speed detecting device 11 and a divider 12 are provided to detect the winding diameter of the beam B. It constitutes a diameter detecting device.

Further, as shown in FIG. 3, in the same manner as in the previous example, the tension correction signal is obtained from the winding diameter signals output from the winding diameter detecting devices 8, 11, and 12 using a preset relational expression. Is provided. A tension compensating device is provided which multiplies the tension compensating rate A of the tension compensating signal outputted by the function setting device 13 by the detected value t outputted by the tension detector 26 to obtain the actual value T of the tension.
4. A tension indicator 15 for displaying the actual value T of the tension output by
Is provided.

As shown in FIG. 3, as in the previous example, the actual value T of the tension obtained by the tension corrector 14 is obtained.
Is compared with a value set in advance in the tension setting device 17, and if there is a difference between the actual value T of the tension and the set value, the rotation speed of the line drive motor 30 or the beam drive motor 2
A tension control device 16 is provided which adjusts the tension of the warp sheet y by increasing or decreasing the number of rotations (or the braking force of the braking device) and adjusting the actual value T of the tension to a set value.

It should be noted that no guide roller is provided between the beam B and the tension detection roller 22 to eliminate a tension detection error due to an increase or decrease in the winding diameter of the beam B.

<Modifications> 1) In the embodiment, the case where the tension of the warp sheet y is maintained at a constant value T even when the winding diameter D of the beam B increases or decreases has been described. The same applies to the case where the tension of the warp sheet y changes as the winding thread diameter D increases or decreases.

2) In the embodiment, the winding diameter detecting device for detecting the winding diameter of the beam B is constituted by the warp speed detecting device 8, the beam rotation speed detecting device 11 and the divider 12, Other detection devices, such as detecting the displacement of the roller in contact with the winding layer surface, are used.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a side view of a mechanical part and a block diagram of an electric part of a yarn tension detecting device according to a first embodiment of the present invention.

FIG. 2 is a diagram schematically showing a relationship between a warp sheet tension and a beam winding diameter and a relationship between a tension correction rate and a beam winding diameter in the yarn tension detection device of the same example.

FIG. 3 is a schematic diagram showing a side view of a mechanical portion and a block diagram of an electrical portion of the yarn tension detecting device according to the second embodiment.

FIG. 4 is a schematic side view of a yarn tension detecting device of a first conventional example.

FIG. 5 is a schematic side view of a yarn tension detecting device of a second conventional example.

[Description of Signs] y Warp sheet B beam 4, 22 Tension detection roller 5, 26 Tension detector 8, 11, 12 Winding yarn diameter detection device 13 Function setting device 14 Tension correction device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-139836 (JP, A) JP-A-59-100740 (JP, A) JP-A-50-105180 (JP, A) JP-A-3-3 77717 (JP, A) JP-A-3-47621 (JP, A) JP-A-2-295847 (JP, A) JP-A-59-123180 (JP, U) JP-A-3-95110 (JP, U) (58) Investigated field (Int. Cl. ⁷ , DB name) G01L 5/04-5/10 B65H 59/40

Claims (1)

(57) [Claims] 1. A tension detecting roller which passes before a warp sheet is wound on a beam or after being unwound from a beam is provided, and as the diameter of the wound yarn of the beam becomes larger or smaller, the warp sheet becomes a tension detecting roller. In a yarn tension detecting device having a configuration in which the direction of the applied force is moved and provided with a tension detector for detecting a component of the force applied to the tension detecting roller by the warp sheet in a fixed direction, a winding yarn for detecting a winding diameter of a beam. A diameter detection device is provided, and a function setting device for obtaining a tension correction signal from a winding diameter signal output from the winding diameter detection device using a preset relational expression is provided. A yarn tension detecting device provided with a tension correcting device for correcting the tension output by the detector.