JP7264636B2 - Method for detecting abnormal pile height in pile loom, and pile loom equipped with device for detecting abnormal pile height - Google Patents

Description

The present invention relates to a pile tension roll around which pile warp yarns sent out from a pile warp beam are wound and supported so as to be oscillatingly displaceable with respect to a loom frame; A position detecting device for detecting the position of the moving member in the longitudinal direction of the loom is provided, and the position of the pile tension roll displaced according to the tension of the pile warp is set in advance so as to keep the tension of the pile warp within a desired range. Based on the detection result of the position detection device, the pile warp beam is adjusted so as to fall within the allowable range defined by the rear limit position and the front limit position with respect to the reference position of the pile tension roll. It relates to a pile loom in which tension control on the pile warp yarns is carried out during loom operation to adjust the delivery speed of the pile warp yarns.

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 pile warp yarns sent out from a pile warp beam are wound. The pile tension roll is supported by an arm supported by a fixed fulcrum on the loom so as to be swingably displaceable in the longitudinal direction of the loom. The pile loom is configured such that the pile warp is positioned at a predetermined position (reference position) on the loom when the tension of the pile warp is at a preset desired level. Therefore, in the pile loom, when the tension of the pile warp yarns changes during weaving, the pile tension rolls are pivotally displaced to positions in the front-rear direction according to the magnitude of the tension.

In addition, the pile loom of Patent Document 1 feeds out the pile warp when the position of the pile tension roll exceeds a preset allowable range due to the displacement caused by the change in the tension of the pile warp as described above. It is configured to perform feed control (pile warp tension control) that corrects the amount (feed rate). That is, since the tension of the pile warp affects the pile height of the pile fabric to be woven, the pile warp tension is controlled in consideration of the quality of the pile fabric in the pile loom. Incidentally, during weaving, the tension of the pile warp inevitably changes as the winding diameter of the pile warp beam changes (decreases), for example. The above-described pile warp tension control is performed in order to cope with such an unavoidable change in the pile warp tension.

The allowable range described above is defined by positions (restricted positions) set on the front side and the rear side with respect to the reference position. Incidentally, 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 are the front side with respect to the reference position. and the rear side, respectively, by the positions of the proximity switches.

Moreover, there is a pile loom disclosed in Patent Document 2 as a pile loom that performs similar tension control. The pile loom of Patent Document 2 is provided with a position detector as a position detector 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 swingably displaceable, and the position detector is provided 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 side limit position and the rear side limit position are set as set values to be compared with values detected by the position detector.

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

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

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

The present invention relates to a pile tension roll around which pile warp sent out from a pile warp beam is wound and supported so as to be oscillatingly displaceable on a loom frame; A position detecting device for detecting the position of the moving member in the longitudinal direction of the loom is provided, and the position of the pile tension roll displaced according to the tension of the pile warp is set in advance so as to keep the tension of the pile warp within a desired range. Based on the detection result of the position detection device, the pile warp beam is adjusted so as to fall within the allowable range defined by the rear limit position and the front limit position with respect to the reference position of the pile tension roll. Applied to pile looms where tension control on the pile warp yarns to adjust the delivery speed is performed during loom operation.

The pile height abnormality detection method according to the present invention detects a pile height abnormality in which the pile fabric being woven in the pile loom continuously has a pile height higher than a desired height. An abnormality determination position, which is an abnormality determination position for determining the presence or absence of the occurrence of the pile tension roll, is set in advance and is set at the limit position on the front side or at a position ahead of the limit position. Alternatively, the occurrence of the pile height abnormality is detected and an abnormality signal is generated based on the arrival of the swinging member to the abnormality determination position.

In the pile height abnormality detection method of the present invention, 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, and the distance to the abnormality determination position is detected. An abnormality determination value is set in advance, and when the detection value output from the position detection device during operation of the loom is compared with the abnormality determination value, the detected value becomes equal to or less than the abnormality determination value. It may be determined that the pile tension roll or the swinging member has reached the abnormality determination position. In addition, in the pile height abnormality detection method of the present invention, a monitoring period for determining whether or not the pile height abnormality has occurred is set in advance, and the detected value is equal to or less than the abnormality determination value. The occurrence of the pile height abnormality may be detected when the period in which the piles are present reaches the monitoring period. Furthermore, the loom may be stopped when the abnormal signal is generated.

Further, the pile loom equipped with the device for detecting the pile height abnormality according to the present invention is characterized in that, in the pile loom described above, when the pile tension roll or the swinging member reaches the abnormality determination position, It is characterized by comprising an anomaly detection device for generating the anomaly signal.

In the pile loom equipped with the device for detecting abnormal pile height according to the present invention, the position detection device is a distance detection device in which the distance to the pile tension roll or the swinging member is output as a detection value. The abnormality detection device stores the abnormality determination value, a comparator that compares the detection value output from the position detection device and the abnormality determination value, and the comparison result of the comparator, the An abnormality determination unit may be provided that generates the abnormality signal when the detected value becomes equal to or less than the abnormality determination value. In addition, the monitoring period is stored in the abnormality detection device, and the abnormality determination unit has a function of grasping an abnormality period during which the detected value is equal to or less than the abnormality determination value. In addition, the abnormal signal may be generated when the abnormal period reaches the monitoring period. Furthermore, 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 a state in which the pile height is higher than the desired height continuously. An abnormality determination position is set in advance with respect to the position of the roll or the swinging member, and during the operation of the loom (during weaving), the front and rear of the pile tension roll or the swinging member detected by the position detection device 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 consider that the pile height abnormality has such an effect as to displace the pile tension roll even under the tension control described above, and based on this, the detected pile It is devised to detect the pile height abnormality based on the position of the tension roll or the swinging member.

More specifically, in a pile loom, the amount of movement of the 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 length corresponding to the amount of movement. omission occurs. Therefore, the amount of movement is set so that the pile warp yarns slightly longer than the length of the pile warp yarns for forming the desired pile height are present between the cloth fell and the beating position at the time of loose picking. In addition, the above-mentioned state in which the tension is within the appropriate range means that in weaving in which a slight amount of pile slipping occurs each time the pile is formed as described above, the pile tension is determined based on the relationship with the feed amount of the pile warp yarns. This is a state in which the roll is positioned within the allowable range described above.

However, for unknown reasons, the pile height may be formed higher than the above-described desired height during weaving. This is due to the fact that, for some reason, the above-mentioned slight pile drop-out, which should normally occur, did not occur, and the pile was formed with the pile warp having the length corresponding to the movement amount. In some cases, such a pile with a higher pile height than the desired height is continuously formed (a state in which a pile with a high pile height is formed in a part of the pile fabric). In such cases, the woven pile fabric is of inferior quality.

In addition, if the pile height is formed higher than the desired height as described above (some pile omission does not occur at the time of pile formation), the pile omission does not occur, and more piles are formed each time the pile is formed. Pile warp is consumed. In addition, the basic feed amount of the pile warp is set so that the tension of the pile warp is within the above-described appropriate range in a state where the pile tension roll is positioned within the above-described allowable range, and where normal pile shedding occurs. is set. Therefore, when piles having a pile height higher than a desired height are continuously formed, the tension of the pile warp yarns rises sharply. Then, as the tension of the pile warp yarns increases, the pile tension rolls are oscillatingly displaced (more specifically, displaced forward) together with the oscillating member as described above.

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 is controlled by the feed control, and the pile tension roll is displaced. Attempts are made to return to a state that is within the tolerance range. However, the tension control assumes an unavoidable change in the tension of the pile warp that occurs under normal conditions, such as the change in the tension of the pile warp due to the change in the winding diameter of the pile warp beam. That is, the tension control is performed to reduce the abnormal tension of the pile warp due to the occurrence of the abnormal pile height, which is the state in which the pile height is formed higher than the desired height as described above. I don't anticipate any changes. Therefore, the tension control cannot cope with the increase in the tension of the pile warp due to such an unexpected abnormality in pile height. , the pile tension roll does not return within the allowable range (further displaces forward).

Therefore, in the present invention, the abnormality determination position for determining whether or not the pile height abnormality has occurred is set at the front limit position in the allowable range or at a position forward of the limit position. In addition, by detecting that the pile tension roll or the swinging member has reached the abnormality determination position during operation of the loom, the occurrence of the pile height abnormality, which has not been performed in conventional pile looms, can be detected. is now possible. 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 have been reached. It is detected that an abnormality has occurred.

In the conventional pile loom, since the occurrence of the pile height abnormality is not assumed in the first place, there has been no concept of detecting the occurrence of the pile height abnormality in some form. rice field. Therefore, in the conventional pile loom, even if the above-described state in which the pile height is higher than the desired height occurs continuously, it is left as it is unless the operator finds it. Weaving is continued in this state. Moreover, in order to discover it, it is necessary to directly see and confirm the pile fabric being woven, and since it is impossible to confirm it at a position away from the loom, it is conceivable that the discovery will be delayed. And, as a result, the quality of the woven pile fabric is significantly impaired.

In contrast, according to the present invention, the occurrence of the pile height abnormality is detected as described above, and an abnormality signal is generated accordingly. Therefore, based on the occurrence of the abnormality signal, for example, if the warning lamp of the loom is flashed and a message indicating the occurrence of the pile height abnormality is displayed on the display of the loom, the pile height is increased during weaving by the loom. The occurrence of an abnormal height can be grasped by the alarm lamp or the like. As a result, the occurrence of the abnormal pile height can be detected at an early stage, and it is possible to prevent the weaving from being continued in a state where the pile height is higher than the desired height. In addition, if the loom is stopped based on the abnormal signal, for example, the operator cannot be stationed in the weaving factory and cannot immediately grasp the occurrence of the abnormal pile height. Even so, it is possible to prevent the weaving from being continued in a state where the pile height is higher than the desired height continuously.

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

In the case where the position detecting device provided for tension control of the pile warp yarn is a distance detecting device, in the present invention, the determination that the pile tension roll or the rocking member has reached the abnormality determination position is the same. The present invention can be realized with a simpler configuration by comparing the detection value output from the distance detection device and the abnormality determination value corresponding to the abnormality determination position. That is, it is necessary to grasp the position of the pile tension roll or the swinging member in order to make the above judgment, and a detecting means for that purpose is required. By using the position detecting device for tension control as the detecting means, the present invention can be realized without providing the loom with a dedicated detecting means for the present invention.

Further, in the present invention, by providing the monitoring period as described above, it is possible to detect the occurrence of the abnormal pile height more accurately and earlier. Specifically, in a pile loom, there is a situation where the pile tension roll is displaced to the vicinity of the front limit position due to the above-described unavoidable tension fluctuation, and weaving is continued in that state. In addition, when the pile tension roll is displaced as the pile is formed in that state, the pile tension roll may be temporarily displaced to a position beyond the forward limit position due to the inertia associated with the displacement. be. Therefore, when such a situation is assumed, the abnormality determination position is sufficiently separated from the front side limit position so as not to be erroneously detected that the pile height abnormality has occurred due to the temporary displacement. position. Even in this case, the abnormal pile height is detected unlike the conventional method, but the detection is made at the time when the pile tension roll or the swinging member swings to such a separated position. .

On the other hand, if a monitoring period as described above is provided, even if such a temporary displacement is assumed, the abnormality determination position is set to a position ( Alternatively, it can be set to that position), and it is possible to prevent such a temporary displacement 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 at an early stage.

Furthermore, if the loom is stopped in response to the occurrence of the abnormal signal as described above, the abnormal pile height will not continue any longer, so that the portion that is woven with the abnormal pile height will be woven. (range) can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an example of a feed-out device of a pile loom to which the present invention is applied; 1 is a block diagram showing an example of the configuration of an abnormality detection device according to the present invention; FIG.

An embodiment of a pile loom equipped with an abnormality detection 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 feed-out device for pile warp yarns PT in a pile loom equipped with an abnormality detection device according to the present invention. In the feeding device 1, the pile warp yarns PT are fed 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 to weave. guided to the front.

In the feeding device 1, the pile tension rolls 5 are supported by a pair of left and right tension levers 6 (only one side is shown in FIG. 1) spaced apart in the width direction of the loom. The tension lever 6 is swingably supported with respect to a loom frame (not shown) by a tension shaft 4 extending in the width direction. Therefore, the pile tension roll 5 is supported by the tension lever 6 so as to be swingably displaceable 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 connected to the output shaft of the torque motor M2 via the tension lever 6 and the link mechanism.

The torque motor M2 is also connected to a pile warp tension controller 11 for controlling the drive of the torque motor M2. The pile warp tension controller 11 is connected to the main controller 14 of the pile loom, and the main controller 14 stores the set tension values of the pile warps PT. Further, the pile warp tension control device 11 controls the driving of the torque motor M2 so as to generate an output torque corresponding to the set tension value. By controlling the driving of the torque motor M2 in such a manner, the pile tension rolls 5 apply an urging force corresponding to the output torque of the torque motor M2 to the pile warp yarns PT. As a result, the pile tension rolls 5 are placed on the loom at a position in which the urging force of the pile tension rolls 5 and the tension of the pile warp yarns PT are balanced in the longitudinal direction of the loom.

In the initial setting of the pile loom, the pile tension roll 5 is arranged at a predetermined position (reference position) in the longitudinal direction of the loom. The urging force has a constant magnitude corresponding to the predetermined set tension value, and the arrangement of the pile tension rolls 5 is determined by the balance between the urging force and the tension of the pile warp yarns PT. Therefore, when the tension of the pile warp yarns PT matches the set tension value, the pile tension roll 5 is arranged at the reference position.

However, as described above, the pile loom unavoidably changes the tension of the pile warp yarns PT during weaving. As a result, the pile tension roll 5 is oscillatingly displaced according to the change in the tension of the pile warp PT, and is arranged at a position corresponding to the tension of the pile warp PT.

Specifically, when the tension of the pile warp yarns PT decreases from the balanced state, the urging force becomes larger than the tension of the pile warp yarns PT. Displace toward However, as a result of the displacement of the pile tension rolls 5, the path length of the pile warp yarns PT from the pile warp beam 2 to the cloth fell (not shown) becomes longer, and the tension of the pile warp yarns PT increases accordingly. Then, when the tension of the pile warp yarns PT increases to a level that balances with the urging force, the pile tension roll 5 stops swinging.

Similarly, when the tension of the pile warp yarns PT increases from the balanced state, the tension of the pile warp yarns PT becomes larger than the biasing force, and the tension causes the pile tension rolls 5 to resist the driving force of the torque motor M2. Displace forward. As a result, the path length of the pile warp yarns PT is shortened, and the tension of the pile warp yarns PT is accordingly reduced. It stops when it drops to a size that is balanced with the force.

In the sending device 1, even if the tension of the pile warp yarns PT changes, the change in the tension is canceled by the change in the path length accompanying the displacement of the pile tension rolls 5 as described above. Since the urging force and the tension of the pile warp yarns PT are always balanced, the tension of the pile warp yarns PT is maintained at a tension corresponding to the set tension value.

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

In addition, the main controller 14 periodically obtains the winding diameter of the pile warp yarns PT on the pile warp beam 2 based on the detected value output from the winding diameter sensor during weaving. Further, during weaving, based on the set values of the loom rotation speed and the weft density stored in advance in the main controller 14 and the winding diameter of the pile warp PT obtained as described above, the feed-out motor M1 is basically operated. A driving speed is calculated. Then, the pile warp let-off control device 13 controls driving of the let-off 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 yarns PT at a delivery amount (delivery speed) corresponding to the basic driving speed of the delivery motor M1.

Furthermore, the pile warp sending control device 13 preliminarily sets the position of the pile tension roll 5 in the front-rear direction (hereinafter referred to as "the front-rear position") that changes according to the tension of the pile warp PT during weaving as described above. The drive of the feed motor M1 is controlled (the feed speed of the pile warp PT is adjusted) based on the fore-and-aft position so that it falls within the set allowable range. However, the allowable range is demarcated from a limit position set on the rear side (rear limit position) and a limit position set on the front side (front limit position) with respect to the reference position. range. In addition, the rearward and forward restriction positions are positions that may adversely affect the weaving when the pile tension roll 5 is positioned beyond the restriction positions in consideration of pile weaving.

The details of the adjustment of the feed-out speed of the pile warp PT by the pile warp feed-out control device 13 are as follows. The adjustment is performed based on the front and rear positions of the pile tension rolls 5 as described above. The adjustment is performed based on the fore-and-aft position. Regarding the allowable range, the rear limit position and the front limit position defining the range are set in advance in the pile warp sending control device 13 as the rear threshold value and the front threshold value, respectively. It is assumed that it is memorized.

A position detector 12 for detecting the front and rear positions of the tension lever 6 is provided near the tension lever 6 . The position detector 12 is a distance sensor in this 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 let-off control device 13 and outputs a detection signal (a signal corresponding to the detected distance) to the pile warp let-off control device 13 . Based on the detection signal, the pile warp sending control device 13 detects the front and rear positions of the tension lever 6 (the distance from the position detector 12). Therefore, in this embodiment, the position detector 12 and the pile warp sending control device 13 constitute a distance detection device as a position detection device.

Further, since the front and rear positions of the tension lever 6 are detected based on the distance from the position detector 12 as described above, the rear threshold value and the front threshold value are set as the distance from the position detector 12. is set.

During weaving, the pile warp feed-out control device 13 controls the longitudinal position of the tension lever 6 detected by the position detector 12 for one cycle of the loom (rotational angle of the loom main shaft from 0° to 360° (0°)). period), and compares the average value (detection value) with the rear side threshold value and the front side threshold value. After that, the pile warp feed-out control device 13 determines that the detection value is larger than the rear side threshold value as a result of the comparison, that is, the tension lever 6 has been displaced rearward beyond the rear limit position. When it is determined that the pile warp yarns PT are sent out at a lower rate, the feed rate is adjusted to be lower. As a result, the tension of the pile warp yarns PT balanced with the urging force is increased, and the pile tension roll 5 (tension lever 6) is displaced forward as described above.

Further, when it is determined that the detected value of the tension lever 6 is smaller than the front side threshold value, the pile warp sending control device 13 determines that the tension lever 6 has moved forward beyond the front side limit position. If so, the feed speed of the pile warp PT is adjusted to increase. As a result, the tension of the pile warp yarns PT decreases, and the pile tension roll 5 (tension lever 6) is displaced rearward as described above. Then, when the longitudinal position of the tension lever 6 returns to within the allowable range, the pile warp let-off control device 13 enters a state of controlling the drive of the let-off motor M1 so as to maintain the adjusted let-off speed. As a result, the longitudinal position of the tension lever 6 is positioned forward of the rear limit position and rearward of the front limit position, that is, within the allowable range.

Thus, in the sending device 1, the pile tension roll 5 applies the biasing force corresponding to the set tension value to the pile warp yarns PT, and the biasing force by the pile tension roll 5 and the tension of the pile warp yarns PT are combined. By balancing, the tension of the pile warps PT matches the set tension value, and the pile tension roll 5 takes a position corresponding to the balance. In addition, in the sending device 1, the sending speed of the pile warp PT is adjusted so that the position of the pile tension roll 5 (tension lever 6) is within the preset allowable range. Tension control of the pile warp yarns PT is performed.

In the pile loom equipped with the feed-out device 1 described above, in the present invention, the pile loom has an abnormal pile height, which is a state in which the pile height is continuously higher than a desired height. An anomaly detection device is provided to detect the occurrence. 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"), and is a forward limit position or a forward limit position. An abnormality signal is generated when the pile tension roll 5 or the tension lever 6, which is the rocking member, reaches an abnormality determination position set in the forward position. In the following, one specific example of such an abnormality detection device of the present invention will be described as a pile height abnormality detection device 10 of this embodiment.

For the abnormality determination, it is necessary to determine whether the pile tension roll 5 or the tension lever 6 has reached the abnormality determination position. In order to make this determination, detection means for grasping the front and rear positions of the pile tension roll 5 or the tension lever 6 is required. On the other hand, in this embodiment, as described above, the sending device 1 detects the longitudinal position of the tension lever 6 with the distance detecting device for tension control of the pile warp yarns PT. Therefore, in this embodiment, the distance detection device is also used as the detection means, and the determination is made using the detection value by the distance detection device. That is, in this embodiment, the distance detecting device for detecting the front and rear positions of the tension lever 6, which is a part of the feeding device 1, also serves as a part of the abnormal pile height detecting device 10 as the detecting means. ing.

Also, in this embodiment, the determination is made by comparing the detection value from the distance detection device with an abnormality determination value preset as the distance from the position detector 12 to the abnormality determination position. . In addition, the abnormality determination is performed based on the detection value becoming equal to or less than the abnormality determination value. It is assumed that this is performed when the abnormal period, which is a period in which the value is equal to or less than the abnormality determination value, reaches the monitoring period. However, in this embodiment, the monitoring period is set by the number of cycles of the loom. Therefore, the abnormal period to be compared with the monitoring period is also determined by the cycle number of the loom.

As a result of the abnormality determination, an abnormality signal is output from the pile height abnormality detection device 10. In this embodiment, the abnormality signal is a signal for stopping the loom (loom stop signal). That is, in this embodiment, the pile loom is constructed so that the loom is stopped in response to the generation of the abnormal signal.

As shown in FIG. 2, the pile height abnormality detection device 10 includes a storage unit 21 that stores an abnormality determination value and a monitoring period, and an abnormality determination value and the front and back position of the tension lever 6 (the detected value) during weaving. and an abnormality determination section 23 for generating an abnormality signal based on the comparison result and the abnormality period.

The storage device 21 is connected to the input setting device 15 in the pile loom on the input side, and is connected to the comparator 22 and the abnormality determination section 23 on the output side. 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 the setting screen displayed on the display screen. The abnormality determination value and the monitoring period are input and set in the input setting device 15, and are sent to and stored in the memory 21 according to the input setting.

Regarding the abnormality determination value stored in the storage unit 21, in the present embodiment, the abnormality determination position corresponding to the abnormality determination value is forward of and near the limit position on the front side. 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 memory 21 is set so as not to detect a temporary forward displacement of the pile tension roll 5 as occurrence of pile height abnormality.

More specifically, in the sending device 1, the tension control of the pile warp yarns PT is performed as described above, and the front and rear positions of the pile tension roll 5 (tension lever 6) exceed the allowable range (limit position). In this case, the feeding speed is adjusted so that the longitudinal position of the tension lever 6 is returned within the limit position range. Therefore, in the delivery device 1, there is a state in which the tension lever 6 exists in the vicinity of the limit position as long as the limit position is not exceeded. In the pile loom, the pile tension roll 5 is once displaced forward and then returned to its original position when the pile is formed. When the pile tension roll 5 operates in such a state that the tension lever 6 exists in the vicinity of the limit position as described above, the inertia of the pile tension roll 5 causes the longitudinal position of the tension lever 6 to temporarily exceed the limit position. Displacement may occur. Moreover, as described above, in the present embodiment, the abnormality determination position is set to a position in the vicinity of the limit position on the front side.

However, since it is not a displacement of the pile tension roll 5 due to the occurrence of a state in which the pile height is higher than the desired height (hereinafter also referred to as a "high pile state"), the temporary displacement is the above-mentioned It is necessary not to detect the displacement of the pile tension roll 5 due to the continuous occurrence of high pile conditions.

Furthermore, the displacement of the pile tension roll 5 in which the front and rear positions of the tension lever 6 exceed the front limit position causes the high pile state in the pile loom as described above, and the high pile state continues to occur. It happens in However, if the occurrence of the high pile state is temporary (for a short period of time), when the pile height returns to the desired height, the displacement of the pile tension roll 5 due to the high pile state will be disappear. In addition, since the tension control of the pile warp yarns PT is performed in the sending device 1 as described above, the tension control returns the front and rear positions of the tension lever 6 to within the limit position range.

In this way, if the continuous occurrence of the high pile state is temporary and subsides 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 the position where it does not reach the abnormality determination position again. In other words, even if the detected value of the tension lever 6 temporarily falls below the abnormality determination value, it becomes greater than the abnormality determination value again.

In addition, depending on the type of pile fabric, it is difficult to notice that the pile height is higher than the desired height depending on the pattern, so even if the high pile state occurs continuously, Depending on the size of the occurrence range, the 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 necessarily regarded as abnormal, and depending on the size of the occurrence range, it may not be regarded as abnormal. There is

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

Thus, in this embodiment, the monitoring period is set as a period based on the degree of occurrence of the high pile state (size of occurrence range) that is acceptable in terms of quality in the pile fabric to be woven at that time. be done. As described above, in this embodiment, the monitoring period is set by the number of cycles of the loom. On top of that, 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). ) is set as the set value.

The comparator 22 is connected to the storage unit 21 and the pile warp sending control device 13 on the input side, and is connected to the abnormality determination section 23 on the output side. As described above, the pile warp 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. In addition, the pile warp sending control device 13 is configured to output the calculated average value to the comparator 22 for each calculation. Thus, in this embodiment, the average value calculated as described above is used as the detected value of the front and rear positions of the tension lever 6 in each loom cycle.

When the detection value output from the pile warp sending control device 13 is input, the comparator 22 compares the abnormality determination value stored in the storage unit 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 corresponding to the magnitude of the determined deviation to the abnormality determination section 23 . That is, the comparator 22 is configured to output the deviation signal to the abnormality determination section 23 for each cycle of the loom. However, in this embodiment, the deviation includes 0 as well. When the deviation is 0, the comparator 22 outputs the deviation signal corresponding to the deviation=0 to the abnormality determination section 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 section 23 is provided with a counter 24 as a counter for counting the abnormal period determined by the cycle number of the loom as described above. Based on the deviation signal output from the comparator 22, the abnormality determination section 23 determines whether or not the detected value is equal to or less than the abnormality determination value, and determines whether the detected value is equal to or less than the abnormality determination value. It is configured to count up the count value (abnormal period) of the counter 24 when it is determined. Further, the abnormality determination unit 23 is configured to reset the count value when determining that the detected value exceeds the abnormality determination 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 counter 24 in the abnormality determination section 23 starts counting the number of cycles. While the detected value is equal to or less than the abnormality determination value (while the deviation is equal to or less than 0), the count value in the counter 24 continues to be counted up. Further, even after the counter 24 starts counting the number of cycles, if the detected value exceeds the abnormality determination value (the deviation exceeds 0), the counter 24 The count value is reset, and then maintained at 0 until the detected value first becomes equal to or less than the abnormality determination value.

Furthermore, every time the count value is updated (counted up), the abnormality determination unit 23 compares the updated count value (abnormal period) with the set value of the monitoring period to determine whether the abnormal period is within the monitoring period. It has an arrival monitor 25 for monitoring whether or not it has reached. After that, the abnormality determination unit 23 detects that the count value corresponding to the abnormal period has become equal to or greater than the set value of the monitoring period as a result of the monitoring by the arrival monitor 25 (=the abnormal period is the monitoring period). is detected to have occurred), a loom stop signal is output to the main controller 14 as an abnormality signal.

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

If the high pile state occurs for some reason during weaving, more pile warp yarns than usual are consumed each time a pile is formed, because some pile omission does not occur during pile formation. When the high pile state occurs continuously, the tension of the pile warp yarns PT rises sharply, and the pile tension roll 5 is displaced forward accordingly. At this time, if the continuous occurrence of the high pile state is not stopped, the pile tension roll 5 is continuously displaced forward.

When the longitudinal position of the tension lever 6 exceeds the above-described forward limit position as a result of the displacement, the pile warp sending control device 13 sends out the pile warp yarns PT in order to return the longitudinal position of the tension lever 6 to within the above-mentioned allowable range. Speed adjustments are made. However, the adjustment of the delivery speed of the pile warp yarns PT assumes an unavoidable change in the tension of the pile warp yarns PT due to a change (decrease) in the winding diameter of the pile warp beam 2. It is not intended to assume an abnormal change in the tension of the pile warp PT due to the occurrence of That is, the adjustment of the feed speed by the pile warp feed 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 feeding speed is adjusted in this way, the pile tension roll 5 (tension lever 6) does not return to the front-rear position, and the pile tension roll 5 does not move in the state where the high pile state continues to occur. Forward displacement continues.

During weaving, the pile warp send-out control device 13 outputs the detection value to the comparator 22 in the pile height abnormality detection device 10 for each cycle of the loom. Each time the detected value is input, the comparator 22 compares the detected value with the abnormality determination value to obtain the deviation, and outputs the deviation signal indicating the magnitude of the deviation to the abnormality determination unit. 23.

As a result of the 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 indicates the abnormality determination value. value or less. Therefore, the deviation signal output from the comparator 22 becomes a signal indicating the deviation.ltoreq.0.

Then, when the deviation signal indicating the deviation ≤ 0 is input to the abnormality determination section 23, the abnormality determination section 23 counts up (+1) the count value of the counter 24 (initially, the count value is 0, so it counts up to 1). That is, the abnormality determination unit 23 counts the number of times the deviation signal indicating the deviation ≤ 0 is continuously input by the counter 24 . Since the deviation signal is output for each cycle of the loom, the count value (total value) is the 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 stop and the pile tension roll 5 continues to be displaced due to the high pile state, the detected value continues to be equal to or less than the abnormality determination value. Therefore, the deviation signal output from the comparator 22 for each cycle of the loom becomes a signal indicating the deviation ≤ 0 while the detected value is equal to or less than the abnormality determination value. Accordingly, 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, the cause of the high pile condition may be temporary, and the high pile condition may subside in a short period of time. In this case, the forward displacement of the pile tension roll 5 due to the high pile state is stopped. Incidentally, when the displacement stops, the detected value exceeds the front side threshold value. Therefore, the pile tension roll 5 is displaced rearward by adjusting the feed speed of the pile warp PT by the pile warp feed control device 13 . As a result, the detected value becomes larger than the abnormality determination value. Accordingly, since the deviation signal output from the comparator 22 becomes a signal indicating the deviation > 0, the abnormality determining section 23 resets the count value (abnormal period) of the counter 24 (count value is reset to 0).

Further, 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. As a result of the comparison, when it is determined that the count value is equal to or greater than the set value of the monitoring period (that is, the abnormal period has reached the monitoring period), the arrival monitor 25 causes the main controller 14 to output an abnormal signal for

In this embodiment, the main controller 14 executes control for stopping the loom when the abnormality signal is input. As a result, in the pile loom, the weaving is stopped, and the continuation of the weaving in a state in which the high pile state is continuously generated as described above is prevented. Therefore, according to the abnormal pile height detection device 10 as described above, it is possible to minimize the portion (range) that is woven in a state where the pile height is higher than the desired height. , it is possible to prevent the quality of the woven pile fabric from being significantly impaired.

In response to the input of the abnormal signal, the main controller 14 turns on an alarm lamp provided in the loom, and informs the input setting device 15 of the cause of the stoppage of the loom (the continuous high pile condition). output a signal indicating the cause of the stoppage and display a message indicating the cause of the stoppage 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.

Furthermore, in the pile height abnormality detection device 10 of the present embodiment, even if the high pile state occurs continuously, the abnormality signal is output as long as the occurrence range is within the allowable range. The monitoring period is set to prevent the loom from stopping more than necessary.

More specifically, as described above, the pile tension roll 5 may be temporarily displaced beyond the forward limit position even if the high pile condition does not occur continuously. Further, even if the high pile state occurs continuously, it may be acceptable in terms of quality depending on the size of the occurrence range. Considering these, whether or not to set the abnormality determination position to a position spaced apart from the forward limit position and generate an abnormality signal only by comparing the abnormality determination value corresponding to the abnormality determination position with the detected value It is conceivable that the determination of However, since the pile height in the high pile state is not always constant, it is difficult to strictly associate the range of occurrence on the woven pile fabric with the amount of displacement (front-rear position) of the pile tension roll 5. . Therefore, when the determination is made only by the abnormality determination position, even if the high pile state is continuously occurring, it is possible to prevent the occurrence of pile omission, albeit slightly, during the formation of each pile. It is necessary to set an abnormality determination position on the assumption that 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 detection device 10 of the present embodiment, after setting the abnormality determination position to a position near the limit position on the front side, the monitoring period corresponding to the allowable occurrence range is set. have set. As a result, while preventing an abnormal signal from being output due to the temporary displacement of the pile tension roll 5 as described above, the abnormal signal is not generated even though the generation range is within the allowable range. It is possible to eliminate the occurrence of a state such as being output. As a result, it is possible to prevent the loom from stopping more than necessary.

Furthermore, in this embodiment, the monitoring period is set according to the number of cycles of the loom. The range of occurrence corresponds to the number of piles formed in the range, and the number of cycles of the loom (pile forming cycle) for forming one pile 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 easily set.

It should be noted that the present invention is not limited to the examples (the above examples) described above, 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 rocking member) that rocks and displaces together with the pile tension roll 5 . However, in the present invention, the abnormality detection can also be performed based on the front and rear positions of the pile tension rolls 5 . However, in that case, the abnormality determination position is set as a position corresponding to the front and rear positions of the pile tension roll 5 .

(2) In the above-described embodiment, the detection of the pile height abnormality (hereinafter also referred to as "abnormality detection") is performed during the period in which the front and rear positions of the tension lever 6 (the rocking member) exceed the abnormality determination position. This is done based on reaching a preset monitoring period. However, in the present invention, such a monitoring period is not set, and the front and rear positions of the swinging member or pile tension roll (hereinafter collectively referred to as the "detected member") reach the abnormality determination position. (or when it is determined that the threshold is exceeded), the abnormality detection may be performed. In this case, considering the temporary displacement of the pile tension roll 5, it is preferable to set the abnormality determination position to a position spaced apart from the forward limit position.

(3) As described above, in order to determine that the member to be detected has reached the abnormality determination position, detection means for grasping the front and rear positions of the member to be detected is required. In addition, in the above-described embodiment, the position detection device (distance detection device) for tension control of the pile warp, which is originally provided in the feed-out device of the pile loom, is also used as the detection means. However, the present invention is not limited to such a configuration, and is configured such that the detection means is a dedicated device separate from the position detection device (the abnormality detection device includes the dedicated detection means). can be

In the above-described embodiment, an average value of the front and rear positions of the member to be detected (tension lever 6) calculated for each cycle of the loom is used as the detection value for the front and rear positions of the member to be detected. ing. However, the detected value may be the detected value of the front and rear positions of the member to be detected detected at a predetermined rotation angle of the loom main shaft, instead of using the average value. Furthermore, the detection value of the front and rear positions of the member to be detected is not limited to being obtained for each cycle of the loom, but may be obtained for each of a plurality of cycles of the loom.

(4) In the above-described embodiment, the above-described distance detection device (which also serves as part of the delivery device 1) is used as the detection means. However, in the present invention, the detection means is not limited to such a device, regardless of whether the detection means is also used as the delivery device 1 or provided exclusively for the abnormality detection device, and the detection configuration is different. device may be used. For example, the detecting means may be a device that detects the inclination (swing angle) of the member to be detected that changes with the swinging displacement of the member to be detected. Specifically, the detection 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 member to be detected, such as the distance detection device or the angle sensor, and may It may be a device that detects that it has been reached.

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

In the device, the detection signal is output from the proximity switch only while the proximity switch is detecting the proximity object. Therefore, if the device generates an abnormality signal after the monitoring period as described above, the proximity switch detects the proximity object even when the member to be detected is displaced further forward beyond the abnormality determination position. The proximal body may be configured to extend forward so as to continue to do so. Then, when the proximity switch detects the proximity object (when the output of the detection signal is started), counting of the abnormal period is started in the same manner as in the above embodiment, and the detection signal is output. An abnormality signal may be output when the state continues over the monitoring period.

(5) In the above embodiment, the abnormality determination position is set at a position forward of the forward limit position. 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 limit position on the front side. That is, the front side threshold value in the above embodiment may also serve as the abnormality determination value. However, as described above, the limit position on the front side is the position where tension control is performed, and is the position where the member to be detected reaches even in a normal weaving state in which the continuous high pile state does not occur. Therefore, when the forward limit position is used as the abnormality determination position, the abnormality detection is prevented even though the continuous high pile state does not occur. It is necessary to set a monitoring period in the same manner as in the above-described embodiment so that an abnormality signal is generated after the monitoring period has elapsed after the member to be detected 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 is stopped in response to the generation of the abnormal signal, and an alarm lamp is turned on. It is configured to perform an alarm 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 response to the occurrence 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. In other words, in the pile loom, at least one of the stop operation, warning operation, and display operation should be executed in response to the generation of the abnormal signal according to the present invention.

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

REFERENCE SIGNS LIST 1 delivery 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 delivery control device 14 main controller 15 input setting device 21 storage device 22 comparator 23 abnormality determination unit 24 counter 25 arrival monitor M1 sending motor M2 torque motor PT pile warp

Claims (8)

A loom comprising: a pile tension roll around which pile warp sent out from a pile warp beam is wound and supported so as to be swingably displaceable with respect to a loom frame; and a swinging member 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 within a preset allowable range. The feed speed of the pile warp beam is adjusted based on the detection result of the position detection device so that the pile tension roll is within the 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 a pile loom in which tension control for the pile warp yarns is executed during loom operation,
The anomaly judgment position for judging whether or not an anomaly in pile height occurs, which is a state in which the pile fabric being woven continues to have a pile height higher than a desired height, and is located on the front side. an abnormality determination position set at a limit position of or a position ahead of the limit position is predetermined,
During operation of the loom, the occurrence of the pile height abnormality is detected based on the fact that the pile tension roll or the swinging member reaches the abnormality determination position, and an abnormality signal is generated. A pile height abnormality detection method in a pile loom. The position detection device is a distance detection device that outputs a distance to the pile tension roll or the swinging member as a detection value,
The distance to the abnormality determination position is set in advance as an abnormality determination value,
The detection value output from the position detection device during operation of the loom is compared with the abnormality determination value, and when the detection value becomes equal to or less than the abnormality determination value, the pile tension roll or the oscillating member is actuated. 2. 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,
3. The pile height according to claim 2, wherein the occurrence of the pile height abnormality is detected when a period during which the detected value is equal to or less than the abnormality determination value reaches the monitoring period. anomaly detection method. 4. The pile height abnormality detection method according to claim 1, wherein the loom is stopped when the abnormality signal is generated. A loom comprising: a pile tension roll around which pile warp sent out from a pile warp beam is wound and supported so as to be swingably displaceable with respect to a loom frame; and a swinging member 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 within a preset allowable range. The feed speed of the pile warp beam is adjusted based on the detection result of the position detection device so that the pile tension roll is within the 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 a pile loom in which tension control for the pile warp yarns is executed during loom operation,
The anomaly judgment position for judging whether or not an anomaly in pile height occurs, which is a state in which the pile fabric being woven continues to have a pile height higher than a desired height, and is located on the front side. and an abnormality detection device that generates an abnormality signal when the pile tension roll or the swinging member reaches an abnormality determination position set at a limit position or a position ahead of the limit position. pile loom. The position detection device is a distance detection device that outputs a distance to the pile tension roll or the swinging 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 and the abnormality determination value; 6. The pile loom according to claim 5, further comprising an anomaly discriminating section that generates the anomaly signal when the detected value becomes equal to or less than the anomaly discriminating value as a result of comparison by 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 abnormality period during which the detected value is equal to or less than the abnormality determination value, and generates the abnormality signal when the abnormality period reaches the monitoring period. 7. The pile loom according to claim 6, characterized in that it is constructed as follows. The pile loom according to any one of claims 5 to 7, wherein the abnormal signal is a signal for stopping the loom.

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