JPH08302535A - Checking of feeding position of warp - Google Patents

Abstract

PURPOSE: To provide a method for checking the reeding position of a warp, capable of surely and easily checking the reeding position in the precision of an ordinal detector, when plural warps are reeded between the dents of a reed. CONSTITUTION: This method for checking whether the reeding position of a warp 1 is right or not, when plural warps 1 are reeded between the dents of a reed 2, comprises driving only a heald frame 4 in the stopped state of a loom to move only the heald frame 4 from other among the plural heald frames corresponding to plural warps 1 reeded between the common dents, thus changing only one warp 1 from the others among the plural warps reeded between the dents, detecting the presence or absence of the warp 1 moved from the other warps with the detector 15, and subsequently comparing the detected data with regular data to check whether the reeding position of the warp 2 through the reed is right or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking the correctness of a warp thread drawing position with respect to a reed wing while a plurality of warp threads are drawn between each reed wing.

[0002]

2. Description of the Related Art In the preparatory stage of machine mounting, the warp thread is pulled through the reed by hand or by a machine. At this time, if the warp yarn is not drawn at the correct position of the reed, that is, between the predetermined reed blades, defects such as warp lines are generated in the woven fabric in the subsequent weaving due to an abnormal texture. Therefore, it is necessary to check whether or not the warp thread is accurately drawn through the reed, and there are the following conventional techniques for such work.

Japanese Patent Laid-Open No. 3-161555 discloses that
After repairing the warp threads when the loom is stopped, it is a device that detects the insertion position of the warp threads into the reed and confirms the correctness of the warp threads.After the warp of the loom is stopped, the loom is reversed from the stop position and the warp thread opening is In the formed state, the insertion position of the upper warp yarn (upper yarn) of the opened warp yarn into the reed is detected in this state. After this detection, the control computer detects the arrangement pattern of the warp thread inserted into the reed near the repaired warp thread and compares it with the reference arrangement pattern to determine whether the insertion position is correct or not.

[0004]

2. Description of the Related Art In view of the description of the specification and the drawings, in the embodiment of the above apparatus, it is premised that only one warp thread is inserted between one reed wing. Has become. Therefore, in the above technology, when a plurality of warp threads are inserted between one reed wing, it is very difficult to cope with the warp thread, and accurate detection may not be possible.

That is, in the above apparatus, when the detection is performed, the loom is reversed according to the opening pattern matched to the fabric structure. Therefore, when multiple warp threads are inserted between one reed wing, depending on the fabric structure,
In some cases, a plurality of heddle frames are located on the upper side, and a plurality of warp threads are present as upper threads between one reed. For this reason,
In order to check whether the warp thread insertion position is correct or not by the above-described device, it is necessary to detect the presence or absence of a plurality of threads between the reed blades, that is, the number of threads. This is very difficult between narrow reeds and the accuracy of the detector must be very high. Even if the accuracy of the detector is high, if the warp yarns are vertically overlapped with each other due to the movement of the warp yarns and only one can be detected, it is impossible to detect the correctness.

In addition, as a modification of the above publication, an embodiment is also possible in which "the presence or absence of a warp threading error is detected by detecting the number of a plurality of warp threads passed between one reed wing. However, since there is no specific description about this, it can be said that reliable detection is difficult for the same reason as above.

[0007]

SUMMARY OF THE INVENTION Therefore, in view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to pay attention to the following points when a plurality of warp yarns are drawn between one reed blade. The purpose of this is to make it possible to reliably and easily check the drawing position with the accuracy of an ordinary detector.

[0008]

SOLUTION: Even when a plurality of warp threads are drawn between one reed blade, the number of warp threads corresponding to one heddle frame is within one between the predetermined reed blades. . Therefore, among the plurality of heddle frames corresponding to the plurality of warp threads drawn between the common reed blades, if only one frame is displaced from the other heddle frames, a plurality of heddle frames will be accordingly moved between the reeds. Only one of the warp threads will be displaced from the other warp threads.
By just detecting the presence or absence of this displaced warp thread, the correctness of the warp thread drawing position can be confirmed.

Therefore, the present invention checks the correctness of the warp thread drawing position when a plurality of warp threads are drawn between the predetermined reed blades of the reed after the completion of the machine work or the warp. When the loom is stopped before the steady operation of the loom is stopped after the warp thread is repaired, the shedding device is driven in a pattern different from the shedding pattern during weaving, and a plurality of warp threads passed between one reed blade Only one of the corresponding heald frames was displaced from the other heald frame, and thereby only one of the plurality of warp threads drawn between the one reed was displaced from the other warp thread. In this state, the presence or absence of this displaced warp yarn is detected to check the correctness of the position of the warp yarn being drawn into the reed.

[0010]

EXAMPLE In this example, a plurality of heald frames are sequentially displaced from the reed side one frame at a time with respect to the other heald frames, and in this displaced state, the presence or absence of warp yarns located above each reed blade is checked. This is an example of detection. As shown in FIGS. 1 and 3, a plurality of warp yarns 1 are formed into a sheet shape, pass between the reed blades 3 of a reed 2, and are drawn to a plurality of heald frames 4 such as three frames according to a fabric structure. Has been done. These heddle frames 4 are driven by the shedding device according to the fabric structure. In this embodiment, as the opening device, an electric opening device 5 driven by a dedicated drive motor 13 corresponding to each heald frame 4 respectively.
Is used, and the operation of each drive motor 13 is controlled by the opening control device 26 provided in the electric opening device 5.

As shown in FIG. 2, the opening control device 26 comprises a position command unit 8, a heald frame driving means 9 and a position control unit 12. A pulse signal Sθ indicating a crank angle θ is input to the position command unit 8 and the heald frame driving unit 9 from an encoder 7 connected to the main shaft 6 of the loom. The position control unit 12 controls the rotation amount of the drive motor 13 based on the signal indicating the target rotation amount input from the position command unit 8 via the OR gate 11 during the steady operation of the loom. Further, at the time of checking the reed drawing position of the warp thread 1 while the loom is stopped, the drive motor 13 is driven based on the signal indicating the target rotation amount input from the heald frame driving means 9 operated by the output signal of the control unit 10 through the OR gate 11. Control the amount of rotation. Further, the position control unit 12 calculates a deviation between the actual rotation amount of the drive motor 13 input from the encoder 14 and the target rotation amount, and controls the drive motor 13 so as to eliminate this deviation.

Further, the warp thread 1 located above each reed blade is located above.
The detection of the presence or absence of is performed by a detection device 15 as shown in FIGS. The detection device 15 is configured to be movable while straddling the upper edge metal 2a of the reed 2,
This is a device for detecting the presence or absence of the warp thread 1 from above. This detection device 15 moves on the upper edge metal 2a of the reed 2 by the traveling means 16 at the time of detection, and when it is not detected, it retreats on the auxiliary guide 17 provided on the side of the reed 2. It is assumed that The auxiliary guide 17 is used for the reed 2
It is assumed that it can move forward and backward with respect to the side of the loom, and it is retracted to a position where it does not interfere with weaving while the loom is operating.

Further, the detecting device 15 is provided with a detector 18, which is, for example, a photoelectric sensor, on the front surface of the reed 2 at a position facing the upper surface of each warp thread 1. Detector 18
Has a detection range of a short distance, and can detect only the warp thread 1 located above each reed blade 3, and sends a thread signal as its output to the comparator 20 inside the control box 19. . The comparator 20 is a thread signal and setting device 2.
The data is compared with the data preset by 1 and a step signal (completion signal) is sent to the controller 10 and a necessary signal is sent to the alarm device 22 according to the comparison result.

Regular data is input to the setter 21 in advance, and the comparator 20 receives a signal from the controller 10.
Is output to The comparator 20 is, as described above, the detector 1
The detection data output from 8 and the regular data from the setting device 21 are compared to check the threading position of the warp thread 1 with respect to the reed 2. In this embodiment, the threading position of the weft thread 1 is checked by counting the number of pulses of the thread signal and comparing with the regular number to determine whether the thread is correct.

As shown in FIG. 5A, the woven fabric is 2 /
When three warp threads 1 are passed through one reed wing in one twill structure, the warp thread 1 between each reed wing is the first,
It is assumed that it corresponds to a few heddle frames 4. In the figure, each represents a warp thread 1, and the number inside thereof corresponds to the frame number of the heddle frame 4. The check of the reed position of the warp yarn 1 is performed in a state before the start of the operation of the loom after the completion of the machine working.

First, the operation switch provided on the control box is operated to send a signal to the controller 10 to start the check operation. At this time, the controller 10 outputs a drive start signal to the heald frame driving means 9. Here, the heald frame driving means 9 starts driving the heald frame 4 so that the heald frame 4 of the first frame is displaced from the other heald frames 4. In this drive, first, a signal Sθ indicating the crank angle θ of the loom from the encoder 7 connected to the main shaft 6 of the loom is input to the heddle frame driving means 9.

Each heald frame driving means 9 obtains a target rotation amount of the drive motor 13 of each heald frame 4 from the above signals, and a signal indicating this rotation amount is sent to the position control section 12 via the OR gate 11.
Output to. Therefore, the position control unit 12 rotates the drive motor 13 that drives each heald frame 4 to the target rotation angle, whereby only the heald frame 4 of the first frame is displaced from the other heald frames 4. As a result, as shown in FIG. 5B, only one warp thread 1 corresponding to the first frame is displaced between the respective reed blades 3 above the other warp threads 1.

Then, the detection device 15 starts the detection operation in response to a signal from the controller 10. That is, the detecting device 15 is moved on the reed 2 by the traveling means 16, and the detector 18 sequentially detects the presence or absence of the warp yarn 1 between the reed blades 3. The detector 18 sends a pulsed yarn signal to the comparator 20 when there is a yarn between the reeds 3. In addition, after the detection device 15 finishes detecting all the warp threads 1 corresponding to the first frame, the detector 18 is reset to prepare for the next detection.

On the other hand, the comparator 20 counts the pulse-shaped yarn signal output from the detector 18, and the detected data (number of yarns) and the regular data (number of yarns) output from the setter 21. Compare and, when they match, warp 1
Is determined to be normal, and a step signal is output to the controller 10. Therefore, the controller 10 outputs a signal instructing to drive the next heald frame 4 to the heald frame driving means 9. By this signal, the heald frame driving means 9 lowers the heald frame 4 of the first frame which has been inspected,
Then, the heddle frame 4 of the second frame is raised. Hereinafter, the pulling positions of the warp threads 1 corresponding to the second frame and the third frame are sequentially checked by the same procedure. When the check is completed for the warp yarns 1 corresponding to all the heald frames 4, the controller 10 outputs a completion signal, and the heald frame driving means 9 returns the heald frames 4 to the state before starting the check.

In the above inspection process, for example, FIG.
If there is a difference in the pulling-in of the warp thread 1 as shown in, the two warp threads 1 are detected as one, and the corresponding warp thread 1 is detected.
It is judged that there is no yarn for the reeds that do not exist. Therefore, the count number of the thread signal is detected as being smaller than that in the normal case, and the comparison results are inconsistent. In this case, an alarm is issued from the alarm device 22, and the check operation is temporarily stopped at that time. After that, the worker or the like performs necessary repair work, and the operation switch is operated again to restart the check work.

In the above embodiment, only one of the plurality of heddle frames is displaced from the other heald frames to check the warp thread pulling difference. However, in the present invention, one heald frame to be displaced is one frame. Not only. That is, it is sufficient that only one of the plurality of warp threads drawn between the one reed is displaced from the other warp thread, for example, as shown in FIG.
When the woven fabric has a flat design as shown in Fig. 4 and two frames between one reed are passed through with four frames, the number of heald frames to be simultaneously displaced may be two. In this case, first, the first and third frames are simultaneously displaced upward with respect to the second and fourth frames. Even with this, only one warp yarn is displaced upward between the reeds, and it is only necessary to detect the presence or absence of the warp yarn displaced upward. After that, the first and third frames are lowered, the second and fourth frames are raised, and the same detection is performed to complete the check operation. However, even in such a case, the check may be performed by sequentially displacing each frame from the first frame.

Further, it is not limited to the case where the same number of warp yarns are drawn between all the reed blades, but also when the warp yarns are drawn in an irregular pattern as shown in FIG. 7, for example. Check is possible. In this case, the warp thread data (number, pattern, etc.) corresponding to each heald frame may be set in the setter for each heald frame and compared with the detection data.

[0023]

[Other Embodiments] As the opening device for driving the heddle frame, the electric opening device is used in the above embodiment, but the object of the present invention can be achieved even when an electronic dobby device is used. . In this case, an opening pattern for checking work is set in the electronic dobby device, and when the checking work is started, this opening pattern is selected and the heald frame is driven. Further, during the check work, the mechanism other than the electronic dobby device (for example, reed, feeding, winding, etc.) and the loom main shaft are disconnected from each other, so that only the heald frame is driven. On the contrary, it is also possible to disconnect the connection between the shedding device and the main shaft of the loom, and to drive only the heald frame by driving the shedding device with a dedicated motor at the time of checking work. The direction in which the heald frame 4 is displaced is not limited to the direction in which the heald frame 4 is displaced upward as in the above-described embodiment, but may be displaced in the downward direction. In this case, the detection device 15 moves below the reed 2. Further, the detection of the pull-in position is not limited to the detection independently of each reed blade 3 as in the above embodiment,
A plurality of reed blades 3 may be set as one unit and detection may be performed for each unit. Further, the detector 18 is not limited to the one running on the upper part of the reed frame 2a of the reed 2 as in the above-described embodiment, but may be movable above or below the reed by a rail provided above or below the reed. Good.

As the comparison of the detection results, the number of lines may be compared as in the above embodiment, or the following may be compared.

(1) The pitches of the pulses of the thread presence signal are compared. As illustrated in FIG. 8, the regular pitch of the yarn signal pulse corresponding to the pitch of the warp yarn 1 is input to the comparator 20. If the warp threads 1 are drawn through the reed 2 at the same regular pitch, only one type of pitch is input. As shown in FIG. 7, when the pitches are not equal, a plurality of pitches corresponding to this are input. The pitch of the detected yarn signal pulse is compared with the regular pitch to determine whether it is correct or not. In this case, an alarm may be issued when a pitch abnormality occurs, or the detection device 15 may be stopped at that position so that the abnormal position can be confirmed. Further, as shown in FIG. 9, an abnormal position may be displayed by using a counter 23, a multiplier 24, a display 25 and the like. That is, the pitch of the abnormal position is counted, and this detection data is sent to the multiplier 24 in which the reed pitch is input in advance. The multiplier 24 calculates the abnormal position by calculation and sends the abnormal position to the display 25 for display. This makes it possible to easily confirm the abnormal portion.

(2) As shown in FIG. 10, the patterns of the pulse of the yarn signal may be compared. The presence or absence of the warp thread 1 is detected in the weft insertion direction, and the pattern of the thread signal pulse obtained by this is input to an image processing device (comparator) or the like, and this is compared with a regular pattern that has been input in advance. The comparison result is displayed by the image processing device, and the correctness can be judged from the display.

[0027]

According to the present invention, it is possible to surely and easily check the position where a plurality of warp threads are drawn between the reeds. In addition, it is possible to carry out the invention because the accuracy of the detector does not need to be increased so much.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus for carrying out a method for checking a warp reed pulling position.

FIG. 2 is a block diagram of an electric opening device.

FIG. 3 is a perspective view of a state in which the detection device is attached to the reed frame.

FIG. 4 is a front view of a correspondence relationship between a detection device and an auxiliary guide.

FIG. 5 is an explanatory view showing a state in which the warp thread is drawn through the reed and the heddle frame.

FIG. 6 is an explanatory diagram showing a state in which the warp thread is drawn through the reed and the heddle frame.

FIG. 7 is an explanatory diagram showing a state in which the warp thread is drawn through the reed and the heddle frame.

FIG. 8 is an explanatory diagram of a correspondence relationship between regular data and detected data.

FIG. 9 is a block diagram of a signal processing system.

FIG. 10 is an explanatory diagram of a correspondence relationship between regular data and detected data.

[Explanation of symbols]

 1 warp thread 2 reed 3 reed 4 heald frame 5 electric opening device 6 main spindle 7 encoder 8 position command section 9 heald frame driving means 10 controller 11 OR gate 12 position control section 13 drive motor 14 encoder 15 detection device 16 guide means 17 18 detector 19 control box 20 comparator 21 setting device 22 alarm device 23 counter 24 multiplier 25 indicator 26 aperture control device

Claims (1)

[Claims] 1. A method for checking the correctness of the warp thread drawing position when a plurality of warp threads are drawn between the reed blades of a reed, wherein the heald frame is driven while the loom is stopped, Only one of the plurality of heddle frames corresponding to the plurality of warp threads passed between the reeds is displaced from the other heddle frames, and accordingly, the plurality of warp threads drawn between the reeds Only one of the warp yarns is displaced from the other warp yarns, the presence or absence of the warp yarns displaced from the other warp yarns is detected by a detection device, and the detected data is compared with the regular data. A method for checking a warp thread reed drawing position, comprising checking whether or not the position of the warp thread drawn into the reed is correct.