JP2020100916A - Detection method for pile height abnormality in pile loom and pile loom including apparatus for detecting pile height abnormality - Google Patents

Abstract

To provide a method for detecting occurrence of pile height abnormality that is a state in which a state that the pile height becomes higher than a desired height continuously occurs and to provide a pile loom including an apparatus for detecting the pile height abnormality.SOLUTION: The pile loom comprises a pile tension roll 5 supported so as to be displaceable in a rocking manner relative to a loom frame and a position detection apparatus 12 for detecting a position in a back and forth direction of the pile tension roll. A tension control of a pile warp PT that adjusts a feeding rate of a pile warp beam 2 is executed on the basis of detection results by the position detection apparatus so that a position of the pile tension roll falls within an allowable range to keep a tension of the pile warp within a desired range. In the pile loom, an abnormality determination position for determining the presence or absence of occurrence of pile height abnormality is predetermined in a pile fabric during weaving. During the operation of the loom, the occurrence of pile height abnormality is detected on the basis of the fact that the pile tension roll has reached the abnormality determination position and an abnormality signal is generated.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pile tension roll around which a pile warp sent from a pile warp beam is wound and is supported so as to be capable of oscillating displacement with respect to a loom frame, and a oscillating displacement that is oscillatingly displaced together with the pile tension roll or the pile tension roll. A position detection device that detects the position of the moving member in the front-rear direction of the loom is provided, and the position of the pile tension roll that is displaced in accordance with the tension of the pile warp to set the tension of the pile warp within a desired range is preset. The pile warp beam is based on the detection result of the position detection device so that the pile warp beam falls within the allowable range defined by the limit position on the rear side and the limit position on the front side with respect to the reference position of the pile tension roll. The present invention relates to a pile loom in which tension control relating to the pile warp yarn for adjusting the delivery speed of the loom is executed during the loom operation.

As a pile loom as described above, for example, there is a pile loom disclosed in Patent Document 1. More specifically, the pile loom disclosed in Patent Document 1 includes a pile tension roll around which the pile warp sent from the pile warp beam is wound. The pile tension roll is supported by an arm supported by a fixed fulcrum on the loom and is swingably movable in the front-rear direction of the loom. Then, the pile loom is configured such that the pile warp threads are located at a predetermined position (reference position) on the loom when the tension of the pile warp threads is a preset desired magnitude. Therefore, in the pile loom, when the tension of the pile warp changes during weaving, the pile tension roll is oscillated and displaced to the position in the front-rear direction according to the magnitude of the tension.

In addition, the pile loom of Patent Document 1 delivers the pile warp yarn when the position of the pile tension roll exceeds a preset allowable range due to the displacement accompanied by the change in the tension of the pile warp yarn as described above. It is configured to perform delivery control (pile warp tension control) for correcting the amount (delivery speed). That is, since the tension of the pile warp affects the pile height of the pile fabric to be woven, in the pile loom, the tension of the pile warp is controlled in consideration of the quality of the pile fabric. By the way, during weaving, the tension of the pile warp yarns inevitably changes as the winding diameter of the pile warp beam changes (decreases), for example. Then, the tension control of the pile warp as described above is performed so as to respond to such an unavoidable change in the tension of the pile warp.

The allowable range is defined by the positions (limit positions) set on the front side and the rear side with respect to the reference position. By the way, in the pile loom of Patent Document 1, the displacement of the pile tension roll as described above is detected by the proximity switch, and the front limit position and the rear limit position of the pile tension roll are the front side with respect to the reference position. And the position of the proximity switch arranged on each of the rear side and the rear side.

Further, as a pile loom that performs similar tension control, there is a pile loom disclosed in Patent Document 2. The pile loom of Patent Document 2 includes a position detector as a position detection device for detecting the position of the pile tension roll. However, in Patent Document 2, the pile tension roll is supported by a tension lever so as to be capable of swinging displacement, and the position detector is provided so as to detect the position of the tension lever that is swingably displaced together with the pile tension roll. .. In addition, in the pile loom of Patent Document 2, the front limit position and the rear limit position described above are respectively set as set values to be compared with the detection value by the position detector.

JP-A-57-005945 JP-A-63-275751

By the way, in the actual weaving in the pile loom, although the tension control is performed as described above, for some reason, the pile height of the pile fabric being woven becomes higher than the desired height. It may occur. If such a phenomenon occurs continuously, the quality of the woven pile fabric will be significantly impaired.

Therefore, the present invention is a method for detecting the occurrence of pile height abnormality, which is a state in which the pile height is higher than a desired height continuously, and the pile height abnormality is detected. An object of the present invention is to provide a pile loom equipped with a device for doing the above.

The present invention relates to a pile tension roll around which a pile warp sent out from a pile warp beam is wound and is supported so as to be capable of swinging displacement with respect to a loom frame, and a pile tension roll or a swinging displacement that is swingably displaced together with the pile tension roll. A position detection device that detects the position of the moving member in the front-rear direction of the loom is provided, and the position of the pile tension roll that is displaced in accordance with the tension of the pile warp to set the tension of the pile warp within a desired range is preset. Based on the detection result by the position detection device so that the pile warp beam falls within the allowable range defined by the limit position on the rear side and the limit position on the front side with respect to the reference position of the pile tension roll. Tension control relating to pile warp yarns, which adjusts the delivery speed, is applied to a pile loom that is executed during loom operation.

Then, the pile height abnormality detecting method according to the present invention, in the pile loom, the pile height abnormality is a state in which the pile fabric being woven is continuously in a state in which the pile height is higher than a desired height. The abnormality determination position for determining the presence or absence of occurrence of the abnormality, which is set in advance to the front limit position or a position in front of the limit position, is determined in advance, and the pile tension roll is in operation during the loom operation. Alternatively, an abnormality signal is generated by detecting that the pile height abnormality has occurred based on the fact that the swing member has reached the abnormality determination position.

The pile height abnormality detection method of the present invention is a distance detection device in which the position detection device outputs the distance to the pile tension roll or the swing member as a detection value, and the distance to the abnormality determination position is set. The abnormality determination value is set in advance, and when the detection value output from the position detection device during operation of the loom and the abnormality determination value are compared and the detection value becomes equal to or less than the abnormality determination value. It may be determined that the pile tension roll or the swing member has reached the abnormality determination position. Then, the pile height abnormality detection method of the present invention, the monitoring period for determining the presence or absence of the occurrence of the pile height abnormality is set in advance, the detection value is equal to or less than the abnormality determination value. It may be possible to detect that the pile height abnormality is occurring when the remaining period reaches the monitoring period. Further, the loom may be stopped when the abnormal signal is generated.

Further, the pile loom provided with the device for detecting the pile height abnormality according to the present invention is based on that the pile tension roll or the swing member reaches the abnormality determination position in the pile loom described above. An abnormality detecting device for generating the abnormality signal is provided.

The pile loom equipped with the device for detecting the pile height abnormality according to the present invention is a distance detection device in which the position detection device outputs the distance to the pile tension roll or the swing member as a detection value. The abnormality detection device stores the abnormality determination value, and a comparator that compares the detection value and the abnormality determination value output from the position detection device, and the comparison result by the comparator. An abnormality determination unit may be provided that generates the abnormality signal when the detected value is equal to or less than the abnormality determination value. In addition, the abnormality detection device stores the monitoring period, and the abnormality determination unit has a function of grasping an abnormal period in which the detected value is equal to or less than the abnormality determination value. At the same time, the abnormal signal may be generated when the abnormal period reaches the monitoring period. Further, the abnormal signal may be a signal for stopping the loom.

According to the present invention, the pile tension is the abnormality determination position for determining the presence or absence of the pile height abnormality, which is the state in which the pile height is continuously higher than the desired height. The abnormality determination position set with respect to the position of the roll or the rocking member is predetermined, and during operation of the loom (during weaving), the pile tension roll detected by the position detection device or the front and rear of the rocking member is detected. The occurrence of the pile height abnormality is detected based on the fact that the position in the direction reaches the abnormality determination position. That is, the inventors of the present invention have considered that the pile height abnormality has an effect of displacing the pile tension roll even under the tension control described above, and based on that, the detected pile height is increased. It has been devised to detect the pile height abnormality based on the position of the tension roll or the swing member.

More specifically, in the pile loom, the amount of movement of the cloth fell position by terry motion is set according to the pile height (desired height) of the pile fabric to be woven. However, in weaving, the pile is not formed by the entire pile warp having the length corresponding to the movement amount, and when the pile warp is in an appropriate tension range, some pile warp is formed at the time of pile formation by the fast pick. Omission occurs. Therefore, the movement amount is set so that the pile warp yarns, which are slightly longer than the length of the pile warp yarns for forming the desired pile height, exist between the cloth fell and the reed beating position during loose picking. It should be noted that the state of being in the proper tension range as described above refers to the pile tension in relation to the basic pile warp yarn delivery amount, etc. in weaving in which some pile omission occurs every time pile is formed as described above. This is a state in which the roll is positioned within the above-mentioned allowable range.

However, although the cause is unknown, the pile height may be formed higher than the desired height described above during weaving. This is a result of the pile being formed by the pile warp yarns having the length corresponding to the movement amount, without causing the slight pull-out of the pile, which would otherwise occur, for some reason. In some cases, piles having a pile height higher than a desired height are continuously formed (a pile having a high pile height is formed in a part of the pile fabric). In such cases, the woven pile fabric will be of impaired quality.

If the pile height is formed higher than the desired height as described above (there is no slight pile omission during pile formation), the pile omission does not occur, and therefore more piles than usual for each pile formation. The pile warp will be consumed. In addition, the basic amount of pile warp yarns is adjusted so that the tension of the pile warp yarns falls within the above-mentioned appropriate range when the pile tension roll is positioned within the above-mentioned allowable range, in the state where normal pile pull-out occurs. It is set. Therefore, when piles whose pile height is higher than a desired height are continuously formed, the tension of the pile warp yarns is rapidly increased. Then, as the tension of the pile warp increases, as described above, the pile tension roll swings together with the swing member (more specifically, moves forward).

On the other hand, under tension control, when the pile tension roll is displaced and its position exceeds the allowable range, as described above, the tension of the pile warp yarn is controlled by the feeding control, and the pile tension roll is not moved. An attempt is made to restore the condition to be within the allowable range. However, the tension control assumes an unavoidable change in the tension of the pile warp that occurs in a normal state, such as a change in the tension of the pile warp due to a change in the winding diameter of the pile warp beam. That is, the tension control is performed by controlling the abnormal tension of the pile warp due to the occurrence of the pile height abnormality, which is a state in which the pile height is higher than a desired height. No change expected. Therefore, even if the tension of the pile warp is increased due to such an unexpected abnormality in the pile height, the tension control cannot sufficiently cope with it, and the tension control of the pile warp is performed by the delivery control. The pile tension roll does not return to the allowable range (displaces further toward the front).

Therefore, in the present invention, an abnormality determination position for determining whether or not the pile height abnormality has occurred is defined at the front side limit position in the allowable range or at a position in front of the limit position. Then, by detecting that the pile tension roll or the rocking member has reached its abnormality determination position during the loom operation, it is possible to detect the occurrence of the pile height abnormality that has not been performed in the conventional pile loom. Can be done. That is, when it is detected that the pile tension roll or the rocking member has reached the abnormality determination position, it is determined that the pile tension roll has been displaced to a position that should not be reached. It is detected that an abnormality has occurred.

Incidentally, in the conventional pile loom, since the occurrence of the pile height abnormality is not expected in the first place, in the conventional art, there is no idea to try to detect the occurrence of the pile height abnormality in any way. It was Therefore, in the conventional pile loom, even if a state in which the pile height becomes higher than the desired height occurs continuously as long as the operator does not discover it, it remains as it is. Weaving will be continued in this state. Moreover, in order to discover it, it is necessary to directly check and confirm the pile fabric being woven, and it is not possible to confirm it at a position away from the loom, which may delay the discovery. And as a result, the quality of the woven pile fabric is significantly impaired.

On the other hand, according to the present invention, the occurrence of the pile height abnormality is detected as described above, and the abnormality signal is generated accordingly. Therefore, on the basis of the occurrence of the abnormality signal, for example, by blinking an alarm lamp of the loom and displaying a message notifying the occurrence of the pile height abnormality on the indicator of the loom, the weaving of the loom is performed. The alarm lamp or the like can be used to recognize that an abnormal height has occurred. Thereby, the occurrence of the pile height abnormality can be detected at an early stage, and the weaving can be prevented from being continued in a state where the pile height is continuously higher than the desired height. Further, if the loom is stopped based on the abnormality signal, for example, the operator is not resident in the weaving factory and the occurrence of the pile height abnormality cannot be immediately grasped. Even if the pile height is continuously higher than the desired height, it is possible to prevent the weaving from being continued.

As described above, according to the present invention, since the pile height abnormality is detected, it is possible to continue weaving in a state where the pile height is continuously higher than the desired height. It is possible to prevent as much as possible, and as a result, it is possible to prevent the above-mentioned significant deterioration of the quality of the pile fabric.

In the case where the position detection device provided for controlling the tension of the pile warp is a distance detection device, in the present invention, it is determined that the pile tension roll or the rocking member has reached the abnormality determination position. The present invention can be realized with a simpler configuration by performing the comparison by the detection value output from the distance detection device and the abnormality determination value corresponding to the abnormality determination position. That is, in making the determination, it is necessary to grasp the position of the pile tension roll or the swinging member, and a detecting means for that is required, but it is necessary to detect the pile warp originally provided in the pile loom as a prerequisite. By also using the position detecting device for tension control as the detecting means, the present invention can be realized without providing the loom with the dedicated detecting means for the present invention.

Further, in the present invention, by providing the monitoring period as described above, it becomes possible to detect the occurrence of the pile height abnormality more accurately and earlier. Specifically, in the pile loom, there is a state in which the pile tension roll is displaced to the vicinity of the front side limit position even by the above-mentioned unavoidable tension fluctuation, and the weaving is continued in that state. Then, when the pile tension roll is displaced in accordance with the pile formation in that state, inertia caused by the displacement may cause the pile tension roll to be temporarily displaced to a position beyond the front limit position. is there. Therefore, when such a situation is assumed, the abnormality determination position is sufficiently separated from the front limit position so that the pile height abnormality is not erroneously detected due to the temporary displacement. Need to be set to the right position. Even in that case, unlike the conventional case, the pile height abnormality is detected, but the detection is performed at the time when the pile tension roll or the swing member is swing-displaced to such a separated position. ..

On the other hand, if the monitoring period as described above is provided, the abnormality determination position is located as close as possible to the front limit position (even if the temporary displacement is assumed as described above). Alternatively, the position can be set to that position, and it is possible to prevent the temporary displacement as described above from being erroneously detected as the occurrence of the pile height abnormality. By setting the abnormality determination position to such a position, it becomes possible to detect the occurrence of the pile height abnormality earlier.

Further, as described above, if the loom is stopped with the occurrence of the abnormality signal, the pile height abnormality does not continue any further, so that the portion woven in the state in which the pile height abnormality has occurred (Range) can be minimized.

It is explanatory drawing which shows an example of the delivery apparatus of the pile loom to which this invention is applied. It is a block diagram which shows an example of a structure of the abnormality detection apparatus by this invention.

An embodiment of a pile loom equipped with an abnormality detecting device for detecting an abnormality in pile height according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a pile warp yarn PT delivery device in a pile loom equipped with an abnormality detection device according to the present invention. In the delivery device 1, the pile warp PT is sent out from the pile warp beam 2 and wound around the guide roll 3, the tension shaft 4, and the pile tension roll 5 provided below the pile warp beam 2 in order. It is led to the front side.

Further, in the feeding device 1, the pile tension roll 5 is supported by a pair of left and right tension levers 6 (only one side is shown in FIG. 1) provided apart from each other in the width direction of the loom. The tension lever 6 is swingably supported by a tension shaft 4 provided so as to extend in the width direction with respect to a loom frame (not shown). Therefore, the pile tension roll 5 is supported via the tension lever 6 so as to be capable of swinging displacement with respect to the loom frame with the tension shaft 4 as the swing center.

Further, the tension lever 6 is connected to the torque motor M2 via a link mechanism including a drive lever 7 attached to the output shaft of the torque motor M2 and a connecting rod 8 connecting the drive lever 7 and the tension lever 6. Therefore, the pile tension roll 5 is in a state of being connected to the output shaft of the torque motor M2 via the tension lever 6 and the link mechanism.

Further, the torque motor M2 is connected to the pile warp tension control device 11 for controlling the driving of the torque motor M2. The pile warp tension control device 11 is connected to the main control device 14 of the pile loom, and the main control device 14 further stores the set tension value of the pile warp yarn PT. Then, the pile warp tension controller 11 controls the drive of the torque motor M2 so as to generate the output torque according to the set tension value. Then, by controlling the drive of the torque motor M2 in such a manner, the pile tension roll 5 applies an urging force corresponding to the output torque of the torque motor M2 to the pile warp yarn PT. As a result, the pile tension roll 5 is placed on the loom at a position where the biasing force of the pile tension roll 5 and the tension of the pile warp yarn PT are balanced with respect to the front-back direction of the loom.

In addition, in the initial setting of the pile loom, the pile tension rolls 5 are arranged in a predetermined position (reference position) in the front-rear direction of the loom. Then, the biasing force is a force of a certain magnitude according to the preset tension value, and the arrangement of the pile tension roll 5 is determined by the balance between the biasing force and the tension of the pile warp yarn PT. Therefore, when the tension of the pile warp yarn PT matches the set tension value, the pile tension roll 5 is placed at the reference position.

However, as described above, in the pile loom, an inevitable change in the tension of the pile warp yarn PT occurs during the weaving. Then, as a result, the pile tension roll 5 is oscillated and displaced according to the change in the tension of the pile warp yarn PT, and is placed at a position corresponding to the tension of the pile warp yarn PT.

Specifically, when the tension of the pile warp yarn PT decreases from the balanced state, the biasing force becomes larger than the tension of the pile warp yarn PT, so that the pile tension roll 5 is in the driving direction of the torque motor M2. Displace toward. However, as a result of the displacement of the pile tension roll 5, the path length of the pile warp yarn PT from the pile warp yarn beam 2 to the cloth fell (not shown) becomes long, and the tension of the pile warp yarn PT accordingly increases. Then, when the tension of the pile warp yarn PT rises to a level commensurate with the urging force, the swing displacement of the pile tension roll 5 is stopped.

Similarly, when the tension of the pile warp yarn PT increases from the balanced state, the tension of the pile warp yarn PT becomes larger than the biasing force, and thus the tension causes the pile tension roll 5 to resist the driving force of the torque motor M2. Displaces forward. As a result, the path length of the pile warp yarn PT is shortened, and the tension of the pile warp yarn PT is reduced accordingly. Therefore, the swing displacement of the pile tension roll 5 is the tension of the pile warp yarn PT. It stops when it reaches a size that is in balance with the power.

Then, in the feeding device 1, even if the tension of the pile warp yarn PT changes, the change of the tension is canceled by the change of the path length due to the displacement of the pile tension roll 5 as described above. Since the biasing force and the tension of the pile warp yarn PT are always in balance, the tension of the pile warp yarn PT is maintained at the tension corresponding to the set tension value.

In the delivery device 1, the pile warp beam 2 is rotationally driven by the delivery motor M1. Further, the drive of the delivery motor M1 is controlled by the pile warp yarn delivery control device 13. Further, in the pile loom, the pile warp yarn delivery control device 13 is connected to the main control device 14. Further, the delivery device 1 includes a winding diameter sensor (not shown) provided near the pile warp beam 2. The winding diameter sensor is connected to the main control device 14, and outputs the detected value to the main control device 14.

Then, the main controller 14 periodically obtains the winding diameter of the pile warp yarn PT on the pile warp yarn beam 2 based on the detection value output from the winding diameter sensor during weaving. Further, during weaving, the basic value of the delivery motor M1 is determined based on the loom rotation speed and the set value of the weft density which are stored in advance in the main controller 14, and the winding diameter of the pile warp PT obtained as described above. The drive speed is calculated. Then, the pile warp delivery control device 13 controls the drive of the delivery motor M1 according to the calculated basic drive speed. As a result, the pile warp beam 2 is rotationally driven so as to send out the pile warp yarn PT at a delivery amount (delivery speed) according to the basic drive speed of the delivery motor M1.

Further, the pile warp yarn delivery control device 13 preliminarily has a position in the front-rear direction (hereinafter, referred to as “front-rear position”) of the pile tension roll 5 that changes according to the tension of the pile warp yarn PT during weaving as described above. It is configured to control the drive of the delivery motor M1 (adjust the delivery speed of the pile warp yarn PT) based on the front-rear position so as to be within the set allowable range. However, the allowable range is defined by a limit position set on the rear side (a limit position on the rear side) and a limit position set on the front side (a limit position on the front side) with respect to the reference position. The range is Further, the rear side and front side limiting positions are positions where the weaving can be adversely affected when the pile tension roll 5 is located at a position beyond the limiting position in consideration of pile weaving.

The details of the adjustment of the delivery speed of the pile warp yarn PT by the pile warp yarn delivery control device 13 will be described below. The adjustment is performed based on the front-rear position of the pile tension roll 5 as described above, but in the present embodiment, the tension lever 6 which is a swing member that swings together with the pile tension roll 5 is displaced. The adjustment will be performed based on the front-rear position. Regarding the allowable range, the setting values corresponding to the rear limit position and the front limit position that define the range are set in advance in the pile warp yarn delivery control device 13 as the rear threshold value and the front threshold value, respectively. It is supposed to be remembered.

A position detector 12 for detecting the front-back position of the tension lever 6 is provided near the tension lever 6. The position detector 12 is a distance sensor in the present embodiment, and is a sensor that detects the distance from the position detector 12 to the tension lever 6. The position detector 12 is connected to the pile warp yarn delivery control device 13, and outputs the detection signal (a signal corresponding to the detected distance) to the pile warp yarn delivery control device 13. Then, the pile warp delivery control device 13 detects the front-rear position of the tension lever 6 (distance from the position detector 12) based on the detection signal. Therefore, in this embodiment, the position detector 12 and the pile warp yarn delivery control device 13 constitute a distance detection device as a position detection device.

Further, since the front-back position of the tension lever 6 is detected by the distance from the position detector 12 as described above, the rear side threshold value and the front side threshold value are also set values as the distance from the position detector 12. It is set.

Then, during the weaving, the pile warp yarn delivery control device 13 performs one cycle of the loom (from the rotation angle of the main shaft of the loom 0° to 360° (0°)) about the front-back position of the tension lever 6 detected by the position detector 12. For each period), the average value of the front and rear positions is calculated, and the average value (detection value) is compared with the rear threshold value and the front threshold value. Then, the pile warp yarn delivery control device 13 determines that the detected value is larger than the rear threshold value as a result of the comparison, that is, the tension lever 6 is displaced rearward beyond the rear limit position. If it is determined that the pile warp yarn PT is delivered, the delivery speed is adjusted. As a result, the tension of the pile warp yarn PT, which is in balance with the biasing force, changes in the direction of increasing, and the pile tension roll 5 (tension lever 6) is displaced forward as described above.

Further, the pile warp delivery control device 13 determines that the detected value of the tension lever 6 is smaller than the front side threshold value, that is, the tension lever 6 is displaced forward beyond the front limit position. If so, the pile warp yarn PT is adjusted so as to increase its delivery speed. As a result, the tension of the pile warp yarn PT changes so as to decrease, and the pile tension roll 5 (tension lever 6) is displaced rearward as described above. Then, when the front and rear position of the tension lever 6 returns to within the allowable range, the pile warp yarn delivery control device 13 is in a state of controlling the drive of the delivery motor M1 so that the adjusted delivery speed is maintained. As a result, the front-back position of the tension lever 6 is located in front of the rear limit position and rear of the front limit position, that is, within the allowable range.

As described above, in the feeding device 1, the pile tension roll 5 causes the biasing force corresponding to the set tension value to act on the pile warp yarn PT, and the biasing force by the pile tension roll 5 and the tension of the pile warp yarn PT are By the balance, the tension of the pile warp yarn PT matches the set tension value, and the pile tension roll 5 takes a position corresponding to the balance. Then, in the delivery device 1, in that state, the delivery speed of the pile warp yarn PT is adjusted so that the position of the pile tension roll 5 (tension lever 6) falls within the preset allowable range. The tension of the pile pile warp yarn PT is controlled.

In the pile loom including the delivery device 1 described above, according to the present invention, the pile loom has a pile height abnormal state in which the pile height is continuously higher than the desired height. An abnormality detection device for detecting the occurrence is provided. Further, the abnormality detection device is an abnormality determination position used for determining whether or not the pile height abnormality has occurred (hereinafter, also referred to as “abnormality determination”), that is, a front limit position or a front limit position. An abnormal signal is generated when the pile tension roll 5 or the tension lever 6 which is the swinging member has reached an abnormality determination position set at a position further forward than the abnormality determination position. A specific example of such an abnormality detection device of the present invention will be described below as the pile height abnormality detection device 10 of the present embodiment.

In order to determine the abnormality, it is necessary to determine that the pile tension roll 5 or the tension lever 6 has reached the abnormality determination position. Then, in order to make that determination, a detection means for grasping the front-back position of the pile tension roll 5 or the tension lever 6 is required. On the other hand, in the present embodiment, as described above, the feeding device 1 detects the front-back position of the tension lever 6 by the distance detection device in order to control the tension of the pile warp yarn PT. Therefore, in the present embodiment, the distance detection device is also used as the detection means, and then the determination is performed using the detection value by the distance detection device. That is, in this embodiment, the distance detecting device for detecting the front-back position of the tension lever 6 which is a part of the feeding device 1 also serves as a part of the pile height abnormality detecting device 10 as the detecting means. ing.

Further, in the present embodiment, the determination is performed by comparing the detection value by the distance detection device and an abnormality determination value preset as a distance from the position detector 12 to the abnormality determination position. .. Then, the abnormality determination is performed on the basis that the detected value becomes equal to or less than the abnormality determination value. In the present embodiment, the monitoring period for the abnormality determination is set in advance and It is assumed that the abnormal period, which is the period when the value is less than or equal to the abnormal determination value, reaches the monitoring period. However, it is assumed that the monitoring period is set by the number of cycles of the loom in this embodiment. Therefore, the abnormal period compared with the monitoring period is also obtained by the number of cycles of the loom.

An abnormal signal is output from the pile height abnormality detecting device 10 as a result of the abnormality determination, but in this embodiment, the abnormal signal is a signal for stopping the loom (loom stop signal). That is, in this embodiment, it is assumed that the pile loom is configured so that the loom is stopped when the abnormal signal is generated.

As shown in FIG. 2, the pile height abnormality detecting device 10 includes a storage device 21 in which an abnormality determination value and a monitoring period are stored, an abnormality determination value during weaving, and a front and rear position of the tension lever 6 (detection value). The comparator 22 is provided with a comparator 22 for comparing the above, and an abnormality determiner 23 for generating an abnormal signal based on the comparison result and the abnormal period.

The storage device 21 is connected on the input side to the input setting device 15 of the pile loom, and is connected on the output side to the comparator 22 and the abnormality determination unit 23. Incidentally, the input setting device 15 has, for example, a touch panel type display screen, and various setting values can be input and set by a setting screen or the like displayed on the display screen. Then, the abnormality determination value and the monitoring period are input and set in the input setting device 15, are sent to the storage device 21 in accordance with the input setting, and are stored in the storage device 21.

Regarding the abnormality determination value stored in the storage device 21, in the present embodiment, the abnormality determination position corresponding to the abnormality determination value is in front of the above-mentioned front-side limit position and in the vicinity of the limit position. Is defined as the position of. Therefore, the abnormality determination value is set as the distance from the position detector 12 to the abnormality determination position as described above.

The monitoring period stored in the storage unit 21 is set so that a temporary forward displacement of the pile tension roll 5 is not detected as an abnormal pile height.

More specifically, in the feeding device 1, the tension control of the pile warp yarn PT is performed as described above, and the front and rear position of the pile tension roll 5 (tension lever 6) exceeds the allowable range (limit position). In this case, the delivery speed is adjusted and the front-back position of the tension lever 6 is returned to the range of the limit position. Therefore, in the delivery device 1, the tension lever 6 may exist in the vicinity of the limit position as long as it does not exceed the limit position. In the pile loom, the pile tension roll 5 is displaced forward and then returned to its original position during pile formation. When the pile tension roll 5 operates in such a manner as described above when the tension lever 6 exists near the limit position, the front and rear positions of the tension lever 6 temporarily exceed the limit position due to the inertia. It may be displaced. Moreover, as described above, in the present embodiment, the abnormality determination position is set as a position in the vicinity of the front limit position, so that the detected value may be less than the abnormality determination value due to the displacement.

However, this is not the displacement of the pile tension roll 5 due to the occurrence of a state in which the pile height becomes higher than the desired height (hereinafter, also referred to as “high pile state”). It is necessary to prevent it from being detected as a displacement of the pile tension roll 5 caused by the continuous occurrence of the high pile state.

Further, the displacement of the pile tension roll 5 in which the front-rear position of the tension lever 6 exceeds the front limit position, the high pile state occurs in the pile loom as described above, and the high pile state continuously occurs. It happens in. However, when the occurrence of the high pile state is temporary (for a short period of time), when the pile height returns to a desired height, the displacement of the pile tension roll 5 due to the high pile state is changed. Lost. Further, since the tension control of the pile warp yarn PT is performed in the delivery device 1, the front and rear positions of the tension lever 6 are returned to within the limit position by the tension control.

As described above, when the continuous occurrence of the high pile state is temporary and is stopped in a short period of time, the front and rear positions of the tension lever 6 temporarily reach the abnormality determination position or the abnormality determination position. Even if it exceeds, it returns to a position where it does not reach the abnormality determination position again. That is, even if the detection value of the tension lever 6 temporarily becomes equal to or less than the abnormality determination value, it becomes larger than the abnormality determination value again.

Regarding the pile fabric, depending on its type, even if the high pile state is in a continuously occurring state because the pile height is less noticeable than the desired height due to its pattern, etc., Depending on the size of the generation range, quality may be acceptable. That is, depending on the type of pile fabric, the state in which the continuous high pile state occurs in the weaving is not always regarded as abnormal, and is not considered abnormal depending on the size of the generation range. There is.

Therefore, in the present embodiment, not only the displacement of the pile tension roll 5 in which the detected value of the tension lever 6 becomes equal to or less than the abnormality determination value due to the inertia of the operation at the time of pile formation described above, but is allowed in the pile fabric. The monitoring period as described above is set so that the continuous occurrence of the high pile state within the range is not detected as an abnormality. In the present embodiment, even if the detection value of the tension lever 6 becomes equal to or less than the abnormality determination value as described above, as long as the period in which the detection value is equal to or less than the abnormality determination value does not reach the monitoring period. Are not detected as abnormal. That is, in this embodiment, the detected pile height abnormality is detected when the period when the abnormality determination value of the detection value is equal to or less than the detection period reaches the monitoring period.

As described above, in the present embodiment, the monitoring period is set as a period based on the degree of occurrence of the high pile state (the size of the generation range) which is qualitatively permitted in the pile fabric woven at that time. To be done. As described above, in this embodiment, the monitoring period is set by the number of cycles of the loom. Further, in a pile loom, one pile is formed in a plurality of loom cycles, so the monitoring period is an integral multiple of the number of loom cycles required to form one pile (pile formation cycle x number of piles). ) Number of cycles is set as a set value.

The comparator 22 is connected to the storage device 21 and the pile warp yarn delivery control device 13 on the input side, and is connected to the abnormality discriminating section 23 on the output side. The pile warp yarn delivery control device 13 calculates the average value of the front and rear positions of the tension lever 6 detected by the position detector 12 for each cycle of the loom, as described above. Then, the pile warp yarn delivery control device 13 is configured to output the calculated average value to the comparator 22 for each calculation. As described above, in the present embodiment, the average value calculated as described above is used as the detection value of the front-back position of the tension lever 6 in each loom cycle.

When the detection value output from the pile warp yarn delivery control device 13 is input, the comparator 22 compares the abnormality determination value stored in the storage device 21 with the detection value, and compares the abnormality determination value with the abnormality determination value. It is configured to obtain the deviation of the detected value. Further, the comparator 22 is configured to output a deviation signal according to the magnitude of the obtained deviation to the abnormality determining section 23. That is, the comparator 22 is configured to output the deviation signal to the abnormality determination unit 23 every cycle of the loom. However, regarding the deviation, in the present embodiment, the deviation includes 0. When the deviation is 0, the comparator 22 outputs the deviation signal corresponding to the deviation=0 to the abnormality discriminating unit 23.

The abnormality determination unit 23 is connected to the storage device 21 and the comparator 22 on the input side and is connected to the main controller 14 on the output side. Further, the abnormality determination unit 23 includes the counter 24 as a counter that counts the abnormal period obtained by the number of cycles of the loom as described above. Then, the abnormality determination unit 23 determines whether or not the detected value is equal to or less than the abnormality determination value based on the deviation signal output from the comparator 22, and the detected value is equal to or less than the abnormality determination value. When it is determined, the count value of the counter 24 (abnormal period) is incremented. Further, when the abnormality determination unit 23 determines that the detected value exceeds the abnormality determination value, the abnormality determination unit 23 is configured to reset the count value.

Therefore, according to the configuration, when the detected value first becomes equal to or less than the abnormality determination value (when the deviation becomes 0 or less), the counting of the number of cycles by the counter 24 in the abnormality determination unit 23 is started. The count value in the counter 24 continues to be incremented while the detected value is equal to or less than the abnormality determination value (while the deviation is equal to or less than 0). Further, even after the counting of the number of cycles in the counter 24 is started, if the detected value exceeds the abnormality determination value (the deviation exceeds 0), the counter 24 The count value is reset, and then the count value is maintained at 0 until the detected value again becomes equal to or less than the abnormality determination value for the first time.

Further, the abnormality determination unit 23 compares the updated count value (abnormal period) with the set value of the monitoring period each time the count value is updated (counted up), thereby determining that the abnormal period is the monitoring period. The arrival monitor 25 is provided to monitor whether or not Then, the abnormality determination unit 23 detects that the arrival monitor 25 has, as a result of the monitoring, the count value corresponding to the abnormal period being equal to or larger than the set value of the monitoring period (=the abnormal period is the monitoring period. When it is detected that the pile height abnormality has reached (1), the loom stop signal is output to the main controller 14 as an abnormality signal.

The operation of the pile height abnormality detecting device 10 in this embodiment as described above is as follows.

When the high pile state occurs for some reason during weaving, more pile warp yarns than usual are consumed each time the pile is formed, because the pile is not slightly removed during pile formation. Then, when the high pile state is continuously generated, the tension of the pile warp yarn PT sharply increases, and accordingly, the pile tension roll 5 is displaced forward. At this time, if the continuous occurrence of the high pile state is not stopped, the forward movement of the pile tension roll 5 continuously occurs.

When the front-rear position of the tension lever 6 exceeds the front limit position due to the displacement, the pile warp yarn delivery control device 13 delivers the pile warp yarn PT in order to return the front-rear position of the tension lever 6 to the allowable range. Speed adjustments are made. However, the adjustment of the delivery speed of the pile warp PT is based on the assumption of the unavoidable change in tension of the pile warp PT due to the change (decrease) in the winding diameter of the pile warp beam 2, and the continuous high pile state. It does not assume an abnormal change in the tension of the pile warp yarn PT due to the occurrence of the. That is, the adjustment of the delivery speed by the pile warp delivery control device 13 cannot cope with the displacement of the pile tension roll 5 caused by the continuous high pile state as described above. Therefore, even if the delivery speed is adjusted in this way, the pile tension roll 5 (tension lever 6) is not returned to the front-back position, and the pile tension roll 5 is not continuously moved in the state where the high pile state continues to occur. The displacement toward the front continues.

During weaving, the pile warp yarn delivery control device 13 outputs the detected value to the comparator 22 in the pile height abnormality detecting device 10 for each cycle of the loom. Then, the comparator 22 compares the detected value and the abnormality determination value for each input of the detected value to obtain the deviation, and outputs the deviation signal indicating the magnitude of the deviation to the abnormality determination unit. It outputs to 23.

As a result of continued displacement of the pile tension roll 5 as described above, when the front-rear position of the tension lever 6 reaches or exceeds the front-rear position corresponding to the abnormality determination value, the detected value is determined to be abnormal. It is less than or equal to the value. Therefore, the deviation signal output from the comparator 22 is a signal indicating the deviation≦0.

Then, when the deviation signal indicating the deviation ≦0 is input to the abnormality determining unit 23, the abnormality determining unit 23 counts up (+1) the count value of the counter 24 (at first, the count value is Since it is 0, it counts up to 1.) That is, while the deviation signal indicating the deviation≦0 is continuously input, the abnormality determination unit 23 counts the number of times the counter 24 inputs the deviation signal. Since the deviation signal is output for each cycle of the loom, the count value (total value) is an abnormal period obtained in units of the number of cycles of the loom.

After that, if the continuous occurrence of the high pile state does not subside and the displacement of the pile tension roll 5 due to the high pile state continues, the state in which the detected value is equal to or less than the abnormality determination value continues. Therefore, the deviation signal output from the comparator 22 for each cycle of the loom is a signal indicating the deviation ≦0 as long as the detected value is equal to or less than the abnormality determination value. Along with this, in the abnormality determination unit 23, the count value of the counter 24 is incremented each time the deviation signal is input.

However, as described above, since the cause of the high pile state is temporary, the high pile state may be settled in a short period of time. In that case, the forward displacement of the pile tension roll 5 due to the high pile state is stopped. At the time when the displacement is stopped, the detected value exceeds the front side threshold value. Therefore, the pile warp delivery control device 13 adjusts the delivery speed of the pile warp yarn PT, whereby the pile tension roll 5 is displaced rearward. As a result, the detected value becomes larger than the abnormality determination value. Along with this, the deviation signal output from the comparator 22 becomes a signal indicating the deviation >0, and therefore the count value (abnormal period) of the counter 24 is reset (count value) in the abnormality determination unit 23. Is returned to 0).

In the abnormality determination unit 23, each time the count value of the counter 24 is updated (counted up), the updated count value (abnormal period) is output to the arrival monitor 25. The arrival monitor 25 compares the count value with the set value of the monitoring period. Then, as a result of the comparison, when it is determined that the count value is equal to or larger than the set value of the monitoring period (that is, the abnormal period reaches the monitoring period), the arrival monitor 25 causes the main controller 14 An abnormal signal is output to.

In the present embodiment, the main control device 14 executes control for stopping the loom as the abnormality signal is input. Thereby, in the pile loom, the weaving is stopped and the weaving is prevented from being continued in the state where the high pile state is continuously generated as described above. Therefore, according to the pile height abnormality detecting device 10 as described above, it is possible to minimize the portion (range) to be woven in a state where the pile height is formed higher than the desired height. It is possible to prevent the quality of the woven pile fabric from being significantly impaired.

Further, the main control device 14 lights an alarm lamp provided on the loom in response to the input of the abnormality signal, and causes the input setting device 15 to stop the loom (continuously in the high pile state). A signal indicating that the stop has occurred is displayed on the display screen. As a result, the operator can be notified that the loom has been stopped due to the continuous occurrence of the high pile state.

Further, in the pile height abnormality detecting device 10 of the present embodiment, even when the high pile state occurs continuously, if the occurrence range is within the allowable range, the abnormality signal is output. The monitoring period is set so as to prevent the loom from being stopped more than necessary.

Specifically, as described above, the pile tension roll 5 may be temporarily displaced beyond the front limit position even if the high pile state is not continuously generated. Further, even if the high pile state is continuously generated, it may be acceptable in terms of quality depending on the size of the generation range. Considering these, the abnormality determination position is set to a position apart from the front limit position, and whether the abnormality signal is generated only by comparing the abnormality determination value corresponding to the abnormality determination position and the detected value. It is conceivable that the determination is made. However, since the pile height in the high pile state is not always constant, it is difficult to grasp the occurrence range on the woven pile fabric and the displacement amount (front and rear position) of the pile tension roll 5 in strict association. .. Therefore, when the determination is made only by the abnormality determination position as described above, even if the high pile state is continuously generated, it is possible that a slight pile omission occurs at the time of forming each pile. It is necessary to set the abnormality determination position on the assumption, and in that case, an abnormality signal may be output even if the occurrence range is within the allowable range.

On the other hand, according to the pile height abnormality detecting device 10 of the present embodiment, the abnormality determination position is set to a position near the front limit position, and then the monitoring period corresponding to the allowable occurrence range is set. It is set. Thereby, while preventing the abnormal signal from being output due to the temporary displacement of the pile tension roll 5 as described above, the abnormal signal is generated even though the generation range is within the allowable range. It is possible to eliminate the occurrence of the state of being output. As a result, it is possible to prevent the loom from stopping more than necessary.

Further, in this embodiment, the monitoring period is set by the number of cycles of the loom. The generation range corresponds to the number of piles formed between them, and the number of cycles of the loom for forming one pile (pile forming cycle) is known in advance. Therefore, if the monitoring period is set according to the number of cycles of the loom, the monitoring period can be set easily.

The present invention is not limited to the above-described embodiments (the above-mentioned embodiments), and can be implemented in the following modified embodiments.

(1) In the above-described embodiment, the abnormality detection is performed based on the front-rear position of the tension lever 6 (the swing member) that is swing-displaced together with the pile tension roll 5. However, in the present invention, the abnormality detection can also be performed based on the front-rear position of the pile tension roll 5. However, in that case, the abnormality determination position is set as a position corresponding to the front-rear position of the pile tension roll 5.

(2) In the above-described embodiment, the pile height abnormality is detected (hereinafter, also referred to as “abnormality detection”) when the front-back position of the tension lever 6 (the swing member) exceeds the abnormality determination position. It is performed based on the fact that the preset monitoring period has been reached. However, in the present invention, when such a monitoring period is not set, the front and rear position of the rocking member or the pile tension roll (hereinafter collectively referred to as “detected member”) reaches the abnormality determination position. The abnormality detection may be performed (or at the time when it is determined that it has exceeded). In this case, it is preferable to set the abnormality determination position to a position separated from the front limit position in consideration of the temporary displacement of the pile tension roll 5 described above.

(3) As described above, in order to determine that the detected member has reached the abnormality determination position, a detection unit for grasping the front-back position of the detected member is required. In addition, in the above-described embodiment, the position detecting device (distance detecting device) for controlling the tension of the pile warp yarn, which is originally included in the feeding device of the pile loom, also serves as the detecting means. However, the present invention is not limited to such a configuration, and is configured such that the detection unit is a dedicated device other than the position detection device (the abnormality detection device includes the dedicated detection unit). May be.

In addition, in the said Example, about the detection value of the front-back position of the said to-be-detected member, the average value of the front-back position of the said to-be-detected member (tension lever 6) calculated for every 1 cycle of a loom is used as that detection value. ing. However, the detection value may not be an average value, and the detection value of the front-back position of the detected member detected at a predetermined rotation angle of the loom main shaft may be used as it is. Further, the detection values of the front and rear positions of the member to be detected are not limited to those obtained for each cycle of the loom, but may be obtained for every plurality of cycles of the loom.

(4) In the above-described embodiment, the distance detection device as described above (also serving as a part of the sending device 1) is used as the detection means. However, in the present invention, the detecting means is not limited to such a device, whether it is also used as the sending device 1 or provided exclusively for the abnormality detecting device, and the detection configuration is different. The device may be. For example, the detection means may be a device that detects an inclination (swing angle) of the detected member that changes with swing displacement of the detected member. Specifically, the detecting means may be an angle sensor such as a potentiometer. In that case, the abnormality determination position is set as the swing angle.

Further, the detection means is not limited to a device capable of continuously detecting the position (state) of the detected member such as the distance detection device and the angle sensor described above, and the detected member is located at a specific position. It may be a device that detects the arrival.

Specifically, the detection means is a proximity switch, and the member to be detected is provided with a proximity body to be detected by the proximity switch. Then, in the abnormality detection device, a proximity switch is provided at a position corresponding to a predetermined abnormality detection position. According to the configuration, when the detected member is displaced and the proximity body reaches the position of the proximity switch at the abnormality determination position, the proximity body (the detected member) is detected by the proximity switch, and the detection signal thereof is output. Is output. After that, the detection signal may be an abnormal signal, or the abnormal signal may be generated after a preset monitoring period from the time when the detected member reaches the abnormal detection position as in the above embodiment. good.

In the case of that device, the detection signal is output from the proximity switch only while the proximity switch is detecting the proximity object. Therefore, when the abnormal signal is generated after the monitoring period in the device as described above, the proximity switch detects the proximity object even when the detected member exceeds the abnormality determination position and is further displaced forward. In order to continue, the proximity body may be formed to extend forward. Then, at the time when the proximity object is detected by the proximity switch (at the time when the output of the detection signal is started), the abnormal period is started to be counted, and the detection signal is output. An abnormal signal may be output when the state continues for the monitoring period.

(5) In the above-described embodiment, the abnormality determination position is set to a position in front of the limit position on the front side. However, in the present invention, the abnormality determination position is not limited to such a position and may be set to the same position as the front limit position. That is, the front threshold value in the above embodiment may also serve as the abnormality determination value. However, as described above, the front limit position is a position where tension control is performed, and is a position where the detected member reaches even in a normal weaving state in which the continuous high pile state does not occur. Therefore, when the front limit position is set as the abnormality determination position in this way, the abnormality detection is prevented from being performed even when the continuous high pile state does not occur. It is necessary to set the monitoring period as in the above-described embodiment so that the abnormal signal is generated after the monitoring period elapses after the detected member reaches the abnormality determination position.

(6) The above embodiment is an example in which an abnormal signal is used as a loom stop signal, and the pile loom performs a stop operation that is stopped in response to the occurrence of the abnormal signal, and an alarm lamp is activated. It is configured to perform a warning operation for lighting and a display operation for displaying a message on the display screen of the input setting device. However, the operation performed in accordance with the generation of the abnormal signal in the pile loom on which the present invention is based is not limited to all of these three operations, and may be one or two of them. That is, at least one of the stop operation, the alarm operation, and the display operation described above may be executed in the pile loom in accordance with the occurrence of the abnormal signal according to the present invention.

The present invention is not limited to the examples described above, and can be modified as appropriate without departing from the spirit of the invention.

1 Feeding Device 2 Pile Warp Beam 3 Guide Roll 4 Tension Shaft 5 Pile Tension Roll 6 Tension Lever 7 Drive Lever 8 Connecting Rod 10 Pile Height Abnormality Detection Device 11 Pile Warp Tension Control Device 12 Position Detector 13 Pile Warp Yarn Delivery Control Device 14 main control device 15 input setting device 21 memory device 22 comparator 23 abnormality determination unit 24 counter 25 arrival monitor M1 delivery motor M2 torque motor PT pile warp

Claims (8)

A loom of a pile tension roll around which a pile warp sent out from a pile warp beam is wound and is supported so as to be capable of swinging displacement with respect to a loom frame, and a swinging member which is swingably displaced together with the pile tension roll or the pile tension roll. The position of the pile tension roll, which is displaced according to the tension of the pile warp so as to keep the tension of the pile warp within a desired range, is a preset allowable range. The pile warp beam delivery speed is adjusted based on the detection result of the position detection device so that the pile tension roll falls within an allowable range defined by the rear limit position and the front limit position with respect to the reference position of the pile tension roll. In the pile loom, in which the tension control for the pile warp to be performed is performed during the loom operation,
The pile side being woven is a state in which the pile height is continuously higher than a desired height, which is a state in which a pile height is abnormal. The limit position or the abnormality determination position set at a position in front of the limit position is predetermined,
An abnormality signal is generated by detecting that the pile height abnormality has occurred based on that the pile tension roll or the rocking member has reached the abnormality determination position during operation of the loom. Pile height abnormality detection method for pile pile loom. The position detection device is a distance detection device that outputs the distance to the pile tension roll or the swing member as a detection value,
The distance to the abnormality determination position is preset as an abnormality determination value,
During operation of the loom, the detection value output from the position detection device and the abnormality determination value are compared, and when the detection value is equal to or less than the abnormality determination value, the pile tension roll or the swing member is The pile height abnormality detection method for a pile loom according to claim 1, wherein it is determined that the abnormality determination position has been reached. A monitoring period for determining whether or not the pile height abnormality has occurred is set in advance,
The pile height according to claim 2, wherein the pile height abnormality is detected when a period in which the detected value is equal to or less than the abnormality determination value reaches the monitoring period. Abnormality detection method. The pile height abnormality detecting method according to any one of claims 1 to 3, wherein the loom is stopped when the abnormality signal is generated. A loom of a pile tension roll around which a pile warp sent out from a pile warp beam is wound and is supported so as to be capable of oscillating displacement with respect to a loom frame, and a oscillating member which is oscillatingly displaced together with the pile tension roll or the pile tension roll. And a position detection device for detecting the position in the front-back direction of the pile warp, the position of the pile tension roll that is displaced according to the tension of the pile warp in order to keep the tension of the pile warp within a desired range is within a preset allowable range. The pile warp beam delivery speed is adjusted based on the detection result of the position detection device so that the pile tension roll falls within an allowable range defined by the rear limit position and the front limit position with respect to the reference position of the pile tension roll. In the pile loom, in which the tension control for the pile warp to be executed is executed during the loom operation,
The pile side being woven is a state in which the pile height is continuously higher than a desired height, which is a state in which a pile height is abnormal. A limit detection position or an abnormality determination position that is set in a position in front of the limit position, and includes an abnormality detection device that generates an abnormality signal based on the fact that the pile tension roll or the rocking member has reached the abnormality determination position. Pile weaving machine. The position detection device is a distance detection device that outputs the distance to the pile tension roll or the swing member as a detection value,
The abnormality detection device stores an abnormality determination value preset as a distance to the abnormality determination position, and a comparator that compares the detection value output from the position detection device with the abnormality determination value, and The pile loom according to claim 5, further comprising: an abnormality determination unit that generates the abnormality signal when the detected value is equal to or less than the abnormality determination value as a comparison result of the comparator. The abnormality detection device stores a monitoring period for determining whether or not the pile height abnormality has occurred,
The abnormality determination unit has a function of grasping an abnormal period in which the detected value is equal to or less than the abnormality determination value, and generates the abnormality signal when the abnormal period reaches the monitoring period. The pile loom according to claim 6, which is configured as follows. 8. The pile loom according to claim 5, wherein the abnormal signal is a signal for stopping the loom.

Images