JP2004292957A - Apparatus for detecting difference in warp tension of loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a difference in warp tension and prevent formation of wale streaks by a simple method in a loom equipped with a plurality of warp beams. <P>SOLUTION: An apparatus for detecting the difference in tension of a plurality of warp sheets delivered side by side from the different warp beams in the weft inserting direction detects a tension receiver having a plurality of contact surfaces which are individually in contact with boundary side ends of the adjoining warp sheets at an interval in the weft inserting direction. Furthermore, the apparatus detects angular rotational displacement or angular rotational force of the tension receiver around the axis extending in the warp moving direction with an angular rotation detector. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for detecting a tension difference between a plurality of warp sheets adjacent in a weft insertion direction by a simple method in a loom having a plurality of warp beams.
[0002]
[Prior art]
As one of devices for detecting a warp tension difference between two warp sheets sent out adjacent to each other in a weft insertion direction from two warp beams, a contact surface that abuts on a boundary side end of the two warp sheets is inserted in a weft insertion direction. A rocker bar having two positions spaced apart from each other, a column supporting the rocker bar so as to be rotatable at an angle about an axis extending in the warp moving direction, and a rocker bar spaced in the weft insertion direction with the column interposed therebetween. There is known an apparatus including two reference planes mounted on a flat panel and two optical or capacitive sensors for measuring the distance from the horizontal reference member to the reference plane for each warp sheet (for example, Patent Document 1). See). In this conventional apparatus, the displacement of the distance from the horizontal reference member of the rocker bar to the reference plane of the sensor is measured by an optical sensor for each warp sheet, and the warp tension difference is calculated. Here, the angular rotation means a rotation of less than 180 °.
[0003]
As another device for detecting a difference in warp tension between two warp sheets, a warp tension detector is disposed for each warp sheet on a warp path at a boundary side end portion of warp sheets adjacent in the weft insertion direction. 2. Description of the Related Art There is known an apparatus that detects a warp tension at a boundary side end portion of a warp sheet for each warp sheet and processes the detected detection signal (for example, see Patent Documents 2 and 3).
[0004]
[Patent Document 1]
JP-A-6-41847 (paragraph number 0012, FIG. 1-2)
[Patent Document 2]
Japanese Patent No. 3070265 (FIG. 1)
[Patent Document 3]
Japanese Patent No. 3070266 (FIG. 1)
[0005]
[Problem to be solved]
In the former device, the distance from the horizontal reference member to the reference surface is optically measured using an optical or capacitance type detection device, so that the warp tension cannot be detected accurately.
[0006]
That is, in the former device, since the rocker bar is only supported by the support, the rocker bar is vibrated by not only the tension difference of the warp sheet but also the vibration of the loom. For this reason, when the rocker bar vibrates and displaces irrespective of the angular rotational displacement accompanying the fluctuation of the warp tension, the distance or the capacity between the horizontal reference member and the reference surface also changes. As a result, in the former, the displacement of the warp corresponding to the change in the warp tension cannot be measured accurately.
[0007]
In addition, in the optical detection device, when fly waste adheres to the light transmitting surface and the light receiving surface of the detector, the warp as an object to be detected, etc., light from the detector may be reflected by the fly waste. As a result, an accurate distance from the horizontal reference member to the reference plane cannot be measured.
[0008]
In particular, a device for measuring the distance between the reference surface provided on the rocker bar and the horizontal reference member of the detection device requires a measurement accuracy of about 0.1 mm to 0.01 mm, but the optical detection device itself does not. Although it has such a high measurement accuracy, the rocker bar structure like the former device cannot measure the distance between the reference plane and the horizontal reference member with high accuracy.
[0009]
In the latter device, the warp tension of the warp sheet from the twin warp beam is individually detected by the warp tension detector for each warp sheet. Therefore, two warp tension detectors are required, and both detected tensions are calculated. Must.
[0010]
An object of the present invention is to detect a difference in warp tension between a plurality of warp sheets by a simple method to prevent the occurrence of warp.
[0011]
[Solutions, actions, and effects]
As a result of elaborate research, the inventors have found that, in order to prevent warps from being generated on the woven fabric, the warp tension values of the adjacent warp sheets are controlled so as to be substantially constant. As a result of various experiments and studies based on the idea that the warp tension may be finely adjusted for each warp sheet based on the warp tension difference between the sheets, the warp tension difference between adjacent warp sheets is calculated as an angular rotational force. It has been found that it is preferable to directly detect it as a stress (torque) as described above or as an angular rotational displacement such as a distance difference, and the present invention described below has been completed.
[0012]
A first warp tension difference detecting device according to the present invention is a device for detecting a warp tension difference between a plurality of warp sheets which are sent out adjacent to each other in a weft insertion direction from different warp beams, and wherein a boundary between the adjacent warp sheets is provided. A tension receiver having a plurality of contact surfaces individually abutting on side end portions; a shaft extending in a direction orthogonal to an adjacent direction of the warp sheet, supporting the tension receiver; And a rotational force detector for detecting an angular rotational force acting around an axis of the shaft.
[0013]
The first warp tension difference detecting device further includes an auxiliary member extending from the tension receiver, wherein the rotational force detector is configured as the rotation preventing member, and is disposed between the auxiliary member and a frame of a loom. In addition, the angular rotation force acting on the rotation preventing member from the auxiliary member in the direction adjacent to the warp sheet may be detected. In this case, the rotational force detector can rotate the rotation preventing member (rotational force detecting member) in a weft insertion direction that is a direction that is significantly different from the direction of the motion (vibration) that causes the loom to generate large vibrations, such as striking motion and shedding motion. Therefore, the detection result of the angular rotational force is hardly affected by the large vibration. As such a detecting means, a load detector using a strain gauge such as a load cell can be cited.
[0014]
The rotation prevention member prevents angular rotation about the axis of the shaft, and the rotation force detector is configured as the rotation prevention member, and detects torque that detects an angular rotation force about the axis of the shaft. A converter may be included.
[0015]
The angular rotational force of the tension receiver depends on the difference in tension between adjacent warp sheets, but is hardly affected by vibration of the loom. Further, even if fly waste adheres to the contact surface, the warp or the like, such fly waste is removed from the contact surface or the warp by the warp moving while contacting the contact surface. Further, the device for detecting the angular rotational displacement or angular rotational force of the tension receiver can obtain the warp tension difference quickly and with high accuracy compared to the device for detecting the distance or the capacity between the reference position and the measured position. be able to.
[0016]
As a result, according to the present invention, according to the present invention, the measurement of the warp tension difference is less affected by the vibration of the loom and the fly cotton, and the tension difference of the warp sheet is directly and accurately compared to the above-described conventional apparatus. It can be detected with high accuracy.
[0017]
Further, according to the present invention, since the warp tension difference between a plurality of adjacent warp sheets is directly detected, only one sensor for measuring the warp tension difference is required, and a sensor for measuring the tension itself is unnecessary. As a result, the number of components of the warp tension difference detection device is reduced as compared with the above-described conventional device, and the calculation processing of the detection signal is simplified.
[0018]
A second warp tension difference detecting device according to the present invention is a device for detecting a warp tension difference between a plurality of warp sheets which are sent out adjacent to each other in a weft insertion direction from different warp beams, and wherein a boundary between the adjacent warp sheets is provided. A tension receiver having a plurality of abutting surfaces individually abutting on side end portions, the tension receiver being rotatable angularly around an axis extending in the warp moving direction, and a shaft supporting the tension receiver so as to be rotatable angularly. And a shaft extending in a direction orthogonal to a direction adjacent to the warp sheet, and a potentiometer for detecting an angular rotational displacement of the tension receiver.
[0019]
The first and second warp tension difference detecting devices may be any directions as long as they face the weft insertion direction. Therefore, for example, a rotational force detector may be provided in the vertical direction.
[0020]
In the first and second warp tension difference detecting devices, the contact surface may be displaceable in a direction perpendicular to the warp sheet.
[0021]
In the first and second warp tension difference detecting devices, the axis line may be disposed between the positions of the boundary side edge portions in a direction perpendicular to the warp sheet. Further, the axis may be located at a center between the contact surfaces in a direction orthogonal to an adjacent direction of the warp sheet. Specifically, the shapes (length, area) of the contact surfaces of the tension receivers may be formed symmetrically with respect to the axis.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIG. 1, a warp tension difference detecting device 10 detects a warp tension difference between two warp sheets 16 and 18 which are sent out adjacent to each other in a weft insertion direction from two warp beams 12 and 14.
[0023]
The warp beams 12 and 14 are arranged on the frame 22 of the loom 20 at intervals in the weft insertion direction so that their rotation axes coincide. Each of the warp beams 12 and 14 has a plurality of warp yarns 24 wound thereon, and sends out these warp yarns 24 side by side in the weft insertion direction in the form of warp sheets 16 and 18 arranged in parallel in one sheet. . The winding width L of the warp in the warp beams 12 and 14 is the same.
[0024]
The warp beams 12 and 14 have beam flanges 26 and 28 detachably attached to both ends thereof, and warp beam gears 30 and 32 detachably attached to opposing side surfaces.
[0025]
The warp beam gears 30 and 32 mesh with gears 38 and 40, which are non-rotatably mounted on the output shafts of the motors 34 and 36, respectively, and apply the rotational force of the motors 34 and 36 to the warp beams 12 and 14, respectively. Tell As the type of the motors 34 and 36, for example, an AC servomotor is adopted.
[0026]
The motors 34 and 36 output the values detected by encoders (not shown) that detect the rotation speeds of the output shafts of the motors 34 and 36 to the control device 42 of the loom 20 as rotation speed signals S1 and S2, respectively. , Based on the rotation command signals S3 and S4 output from the controller 42.
[0027]
The warp sheets 16 and 18 sent out from the warp beams 12 and 14 are applied to a tension roller 44 having a length larger than the width L of the warp sheets 16 and 18. The warp sheets 16 and 18 are turned in the direction of being sent out by the tension roller 44, passed through the warp tension difference detection device 10, beaten, and wound up by a clothes roll (not shown) of the winding device into a cross beam. .
[0028]
The tension roller 44 is rotatably attached to the frame 22 of the loom 20 by a support member 45 such as a bearing at one end, and is like a bearing at the other end so that its own rotation axis extends in the weft insertion direction. The supporting member 45 supports the frame 22 via a load cell 46.
[0029]
The load cell 46 receives the force (warp tension) in the moving direction from the warp sheets 16 and 18 and detects the total warp tension T of the warp sheets 16 and 18 and sends the detected total warp tension T to the total warp tension signal. It outputs to the control device 42 as S5.
[0030]
The warp tension difference detecting device 10 detects a tension difference between the warp sheets 16 and 18 at a position downstream of the tension roller 44 and upstream of the beating position in the warp moving direction.
[0031]
The warp tension difference detecting device 10 includes a tension receiver 52 extending in the weft insertion direction across the space between the adjacent warp sheets 16 and 18. The tension receiver 52 is provided with two contact surfaces 48 and 50 (see FIG. 2) that contact one surface in a range of the dimension w from the boundary side ends of the warp sheets 16 and 18. The contact surfaces 48 and 50 are spaced in the weft insertion direction so as to correspond to the warp sheets 16 and 18, respectively.
[0032]
As will be described later, the tension receiver 52 is mounted on a rotation shaft 62 (see FIG. 2) that can be rotated angularly about an axis 54 extending in the warp movement direction. Therefore, the contact surfaces 48 and 50 are vertically displaceable with respect to the warp sheets 16 and 18.
[0033]
The warp tension difference detecting device 10 also includes four yarn guides 56 abutting on the other surface in the range of the dimension w from the boundary side ends of the warp sheets 16 and 18. Two yarn guides 56 are provided for each of the warp sheets 16 and 18, and are provided before and after the tension receiver 52 in the warp moving direction. The yarn guide 56 has at least substantially the same length dimension w as the tension receiver 52 and extends in the weft insertion direction.
[0034]
The boundary side ends of the warp sheets 16 and 18 sent out from the tension roller 44 are moved while contacting the upper surface of the yarn guide 56, the lower surface of the tension receiver 52 and the upper surface of the yarn guide 56 in this order. In the illustrated embodiment, the tension receiver 52 and the yarn guide 56 are in contact with approximately the same number of warps 24 from the boundary ends of the warp sheets 16 and 18.
[0035]
The warp tension difference detecting device 10 detects an angular rotation displacement or an angular rotation force of the tension receiver 52 about the axis 54, which is caused by a difference in tension at the boundary side ends of the warp sheets 16 and 18, and detects angular rotation. And outputs a value of the detected angular rotational displacement or angular rotational force to the control device 42 as a warp tension difference signal S6 representing a warp tension difference Tc.
[0036]
The controller 42 calculates the following equations (6) and (7) based on the total warp tension T and the warp tension difference Tc obtained from the total warp tension signal S5 and the warp tension difference signal S6, and calculates the warp sheet. The warp tensions T1 and T2 of 16 and 18 are determined.
[0037]
The control device 42 rotates the motors 34 and 36 at a predetermined speed based on the rotation speed signals S1 and S2 indicating the rotation speeds of the motors 34 and 36, and the calculated total warp tension T and the warp tensions T1 and T2. The rotation command signals S3 and S4 are generated, and the motors 34 and 36 are driven by the rotation command signals S3 and S4. Therefore, the control device 42 performs feedback control of the motors 34 and 36.
[0038]
The warp tensions T1 and T2 are determined as follows.
[0039]
Assuming that the tensions of the warp sheets 16 and 18 acting on the respective contact surfaces of the tension receiver 52 are t1 and t2, respectively, the tensions t1 and t2 and the warp tension difference Tc are expressed by the equations (1) and (2) and the equation (2). It is represented by 3).
[0040]
t1 = (w · T1) / L (1)
[0041]
t2 = (w · T2) / L (2)
[0042]
Tc = t1-t2 (3)
[0043]
From Equations 1 to 3, the warp tension difference Tc can be expressed by Equation (4).
[0044]
Tc = (w (T1-T2)) / L (4)
[0045]
Further, since the total warp tension T is expressed by the equation (5), the warp tensions T1 and T2 can be expressed by the equations (6) and (7).
[0046]
T = T1 + T2 (5)
[0047]
T1 = (T + (L · Tc) / w) / 2 (6)
[0048]
T2 = (T− (L · Tc) / w) / 2 (7)
[0049]
The warp tension difference detecting device 10 will be described in detail with reference to FIG.
[0050]
As shown in FIG. 2A, the tension receiver 52 has contact surfaces 48 and 50 on the lower side of both ends. The tension receiver 52 integrally connects an auxiliary member 58 extending downward from a longitudinal center portion thereof, and acts together with the auxiliary member 58 as a T-shaped member when viewed from the warp moving direction.
[0051]
As shown in FIG. 2B, the tension receiver 52 and both yarn guides 56 have the same diameter. The tension receiver 52 is located at the same height as the two yarn guides 56 and extends between the two yarn guides 56 in the warp moving direction in the weft insertion direction. For this reason, the warp sheets 16 and 18 are moved so as to contact the upper surface of one of the yarn guides 56, then abut the lower surface of the tension receiver 52, and then contact the upper surface of the other yarn guide 56. You.
[0052]
If the above condition is maintained, the tension receiver 52 and the two yarn guides 56 may have different diameters, or may be provided at different height positions.
[0053]
The contact surfaces 48 and 50 of the tension receiver 52 are located below the virtual surface connecting the contact portions of the two yarn guides 56 and 56 with which the warp sheets 16 and 18 are in contact in FIG. For this reason, the warp tensions t1 and t2 of the warp sheets 16 and 18 act on the tension receiver 52 in a direction substantially perpendicular to the surface of the warp sheets 16 and 18 (upward in FIG. 2B).
[0054]
The warp tension difference detecting device 10 detects the angular rotation of the tension receiver 52 as a rotational force by the angular rotation detector 60.
[0055]
The angular rotation detector 60 includes a rotation shaft 62 that supports the tension receiver 52, an auxiliary member 58 extending from the tension receiver 52 in a direction intersecting the rotation shaft 62, and a load from the auxiliary member 58 acting in a weft insertion direction. As described above, the rotational force detector 64 disposed between the distal end portion of the auxiliary member 58 and the frame 22 is included.
[0056]
The rotation shaft 62 extends in the warp moving direction, and assembles the tension receiver 52 to the frame 22 so as to be rotatable around an axis 54. In the following description, it is assumed that the tension receiver 52 is assembled to the rotation shaft 62 so as not to be angularly rotatable, and the rotation shaft 62 is assembled to the frame 22 so as to be angularly rotatable relative to the frame 22.
[0057]
However, if the tension receiver 52 is supported by the frame 22 so as to be capable of angular rotation, the rotation shaft 62 and the tension receiver 52 may be assembled such that relative angular rotation is possible or impossible, or the rotation shaft 62 may be used. And the frame 22 may be assembled such that relative angular rotation is possible or impossible.
[0058]
When the tension of one of the warp sheets 16 and 18 becomes greater than that of the other, the tension receiver 52 is pulled up on the side of the contact surface 48 or 50 that comes into contact with the warp sheet 16 or 18 having a large tension, and the tension difference is reduced. Rotated about axis 54 by a corresponding angle. As a result, the auxiliary member 58 is angularly rotated, and the amount of rotation and thus the rotational force are detected by the rotational force detector 64.
[0059]
The rotational force detector 64 is connected to the lower end of the auxiliary member 58 and supported by the frame 22 so as to receive the rotational force of the auxiliary member 58 in the weft insertion direction. A load cell can be used as such a rotational force detector 64.
[0060]
The rotational force detector 64 acts as a rotation preventing member 66 for preventing the angular rotation of the tension receiver 52 around the axis 54, and the tension receiver acting in the direction of the load axis of the rotational force detector 64 by the auxiliary member 58. The angular rotation force of 52 is detected as a warp tension difference Tc, and the detected warp tension difference Tc is output to the control device 42 as a warp tension difference signal S6.
[0061]
More specifically, the tension receiver 52 receives the warp tensions t1 and t2 of the warp sheets 16 and 18 on the contact surfaces 48 and 50, respectively. The tension receiver 52 receives a clockwise rotation force in FIG. 2A when the warp tension t1> the warp tension t2, and rotates counterclockwise when the warp tension t1 <the warp tension t2. Receive strength. However, in any case, the rotation of the tension receiver 52 is prevented by the rotational force detector 64, and the tension receiver 52 hardly rotates with respect to the frame 22 of the loom 20.
[0062]
The warp tension difference Tc obtained by the equation (3) represents the rotational force of the tension receiver 52 around the axis 54 with the tension receiver 52, and is directly detected by the rotational force detector 64 via the lower end of the auxiliary member 58. Is detected.
[0063]
As described above, the angular rotation force (difference in warp tension) directly detected by the rotation force detector 64 depends on the difference in tension between the adjacent warp sheets 16 and 18; It is almost unaffected and can be obtained quickly and accurately with a single detector 64.
[0064]
Referring to FIG. 3, the warp tension difference detecting device 70 detects angular rotation of the tension receiver 52 around an axis extending in the warp moving direction as torque by an angular rotation detector 72.
[0065]
The angular rotation detector 72 includes a rotation shaft 74 rotatable angularly around an axis extending in the warp movement direction, and a torque converter 76 that detects an angular rotation force acting on the tension receiver 52 via the rotation shaft 74. And is configured as a torque converter.
[0066]
The rotating shaft 74 extends between the warp sheets 16 and 18 in the warp moving direction, and supports the tension receiver 52 at the center in the weft insertion direction. The axis of rotation of the rotating shaft 74 is between the height positions of the boundary side edges of the warp sheets 16 and 18 in a direction perpendicular to the warp sheets 16 and 18. The torque converter 76 is of a rotary type, and detects an angular rotational force of the rotary shaft 74 about an axis extending in the warp moving direction as a torque.
[0067]
The rotating shaft 74 may be shared with the load acting portion of the torque converter 76. Further, the rotating shaft 74 may be formed integrally with the tension receiver 52, or may be assembled so as to be relatively immovable with a joining member such as a screw.
[0068]
The torque converter 76 is mounted on the frame 22 so as to be relatively immovable, and supports the rotating shaft 74 to move the tension receiver 52 to a position having a positional relationship with the yarn guide 56 shown in FIG. To support. The warp tensions t1 and t2 of the warp sheets 16 and 18 act on the contact surfaces 48 and 50 of the tension receiver 52 in a direction (upward) substantially perpendicular to the surfaces of the warp sheets 16 and 18.
[0069]
When the tension receiver 52 has a relationship of warp tension t1> warp tension t2, it receives a rotational force clockwise in FIG. 3A, and when it has a relationship of warp tension t1 <warp tension t2, FIG. At a counterclockwise rotation force. For this reason, the warp tension difference Tc acts on the torque converter 76 as an angular rotational force.
[0070]
The torque converter 76 includes a rotation preventing member 78 that prevents the tension receiver 52 from rotating angularly because the housing of the torque converter 76 that receives the rotation shaft 74 does not rotate relative to the torque converter 76. It functions as a rotational force detector for detecting the angular rotational force of the tension receiver 52.
[0071]
The torque converter 76 detects the angular rotation force (torque) of the tension receiver 52 as the warp tension difference Tc, and outputs the detected warp tension difference Tc to the control device 42 as the warp tension difference signal S6.
[0072]
As described above, the torque (warp tension difference) directly detected as an angular rotational force by the torque converter 76 depends on the difference in tension between the adjacent warp sheets 16 and 18, but the vibration of the loom, the fly cotton, etc. , And can be obtained quickly and accurately with a single detector 76.
[0073]
Referring to FIG. 4, the warp tension difference detecting device 82 detects an angular rotation of the tension receiver 52 about an axis extending in the warp moving direction as a voltage value (or a current value) by an angular rotation detector 84. . The angular rotation detector 84 includes a potentiometer 86 for detecting the amount of angular rotation displacement instead of the torque converter 76 shown in FIG. The potentiometer 86 includes an operating contact (not shown) provided on the shaft and a fixed resistor provided around the axis.
[0074]
The rotating shaft 88 extends in the warp movement direction so as to be rotatable around an axis extending in the warp movement direction, and supports the tension receiver 52. The rotation axis of the potentiometer 86 is coaxially and non-displaceably coupled to the rotation axis 88 such that its axis is the same as that of the rotation axis 88. Therefore, the rotation axis of the potentiometer 86 is angularly rotated with respect to the frame 22 of the loom 20 by the angular rotation of the tension receiver 52.
[0075]
The rotating shaft 88 may be formed integrally with the tension receiver 52, or, as shown in FIG. 5, a keyway 90 may be provided in a fitting shaft which is one end of the rotating shaft 88 and a fitting hole of the tension receiver 52. May be formed, and the key 92 may be used to assemble the tension receiver 52 so as not to rotate relatively. In the former case, the potentiometer 86 may be directly attached to a shaft portion acting as a rotation shaft of the tension receiver 52.
[0076]
If the warp tensions acting on the warp sheets 16 and 18 are the same, the tension receiver 52 is maintained in a horizontal state.
[0077]
When the tension receiver 52 has a relationship of warp tension t1> warp tension t2, it tends to rotate clockwise in FIG. 4, and when it has a relationship of warp tension t1 <warp tension t2, it will rotate counterclockwise in FIG. And
[0078]
If a difference occurs in the warp tension acting on the warp sheets 16 and 18, a difference occurs in the tension acting upward (upward in FIG. 4) on the contact surfaces 48 and 50 of the tension receiver 52, and the tension receiver 52 Is angularly rotated by receiving an angular rotational force about the axis of the rotating shaft 88.
[0079]
As the tension receiver 52 is rotated clockwise or counterclockwise, the warp 24 in contact with the contact surface 48 or 50 moved upward in FIG. 4 is loosened and moves downward in FIG. The warp 24 in contact with the abutted contact surface 50 or 48 extends.
[0080]
Thereby, the clockwise or counterclockwise angular rotational force of the tension receiver 52 becomes smaller, and the tension receiver 52 eventually stops at the rotation angle position where the tension received from the contact surfaces 48 and 50 is balanced. The rotation angle position of the tension receiver 52 where the tension is balanced is substantially proportional to the warp tension difference Tc.
[0081]
With the displacement due to the angular rotation of the tension receiver 52 as described above, the resistance value of the potentiometer 86 changes. The potentiometer converter 87 detects the voltage value or the current value A input to the potentiometer 86, and outputs the voltage value or the current value to the control device 42 as a warp tension difference signal S6 representing the angular rotation displacement of the tension receiver 52. I do. Therefore, the angular rotation detector 84 does not detect the angular rotation force of the tension receiver 52, but detects the angular rotation displacement.
[0082]
As described above, the voltage value or the current value (warp tension difference) directly detected by the potentiometer 86 as the angular rotational displacement amount depends on the difference in the tension between the adjacent warp sheets 16 and 18, It is almost unaffected and can be obtained quickly and accurately with a single detector 86.
[0083]
The present invention is not limited to the above embodiments, and can be variously modified without departing from the gist thereof.
[Brief description of the drawings]
FIG. 1 is a view showing a loom equipped with a first embodiment of a warp tension difference detecting device according to the present invention.
2A and 2B are diagrams for explaining a warp tension difference detecting device used in the loom shown in FIG. 1, wherein FIG. 2A is a diagram viewed from a warp moving direction, and FIG. 2B is a diagram viewed from a weft insertion direction; is there.
3A and 3B are diagrams showing a second embodiment of the warp tension difference detecting device according to the present invention, wherein FIG. 3A is a view of (B) viewed from the warp moving direction, and FIG. It is the figure which looked at the apparatus from the top.
FIG. 4 is a view showing a third embodiment of the warp tension difference detecting device according to the present invention.
5A and 5B are diagrams for explaining a modified example of the warp tension difference detecting device shown in FIG. 4, wherein FIG. 5A is a diagram of the warp tension difference detecting device as viewed from above, and FIG. It is the figure seen from the axial direction.
[Explanation of symbols]
L Width of warp winding in warp beam
S1, S2 rotation speed signal
S3, S4 Rotation command signal
S5 Total warp tension signal
S6 Warp tension difference signal
T Total warp tension
T1, T2 Warp tension of warp sheet
t1, t2 Warp tension of the warp sheet received on the contact surface
Tc Warp tension difference
10 Warp tension difference detector
12,14 Warp beam
16,18 warp sheet
20 loom
22 Loom frame
24 Warp
26, 28 Beam flange
30, 32 Warp beam gear
34,36 motor
38, 40 gears
42 Controller
44 tension roller
45 Supporting member
46 load cell
48,50 contact surface
52 Tension receiver
54 axis
56 Yarn Guide
58 Auxiliary member
60,72,84 Angular rotation detector
62, 74, 88 Rotation axis
64 Rotational force detector
66,78 rotation prevention member
70,82 Warp tension difference detector
76 Torque converter
86 potentiometer
87 Potentiometer Converter
90 keyway
92 key

Claims (7)

A device for detecting a difference in warp tension of a plurality of warp sheets sent out adjacent to each other in a weft insertion direction from different warp beams,
A tension receiver having a plurality of abutting surfaces individually abutting on boundary side ends of the adjacent warp sheets;
A shaft extending in a direction orthogonal to an adjacent direction of the warp sheet and supporting the tension receiver,
A rotation preventing member for preventing angular rotation of the tension receiver,
A rotational force detector for detecting an angular rotational force acting around the axis of the shaft. Further, an auxiliary member extending from the tension receiver is included,
The rotational force detector is configured as the rotation preventing member, and is disposed between the auxiliary member and a frame of a loom, and acts on the rotation preventing member from the auxiliary member to the rotation preventing member in a direction adjacent to the warp sheet. The warp tension difference detecting device according to claim 1, which detects an angular rotation force. The rotation preventing member prevents angular rotation about the axis of the shaft;
The warp tension difference detecting device according to claim 1, wherein the rotational force detector includes a torque converter configured as the rotation preventing member and configured to detect an angular rotational force around an axis of the shaft. A device for detecting a difference in warp tension of a plurality of warp sheets sent out adjacent to each other in a weft insertion direction from different warp beams,
A tension receiver having a plurality of abutting surfaces individually abutting on the boundary side end portions of the adjacent warp sheets, the tension receiver being rotatable angularly around an axis extending in the warp moving direction;
A shaft that supports the tension receiver so as to be rotatable at an angle, and extends in a direction orthogonal to an adjacent direction of the warp sheet,
And a potentiometer for detecting an angular rotational displacement of the tension receiver. The warp tension difference detecting device according to any one of claims 1 to 4, wherein the contact surface is capable of being displaced in a direction perpendicular to the warp sheet. The warp tension difference detecting device according to any one of claims 1 to 5, wherein the axis is disposed between the positions of the two boundary side edges in a direction perpendicular to the warp sheet. The warp tension difference detecting device according to any one of claims 1 to 6, wherein the axis is located at a center between the contact surfaces in a direction orthogonal to an adjacent direction of the warp sheet. .

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