JP2844383B2 - Warp yarn repair device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for repairing a cut warp yarn when a warp yarn breaks during weaving, and setting the loom to a restartable state.

(Prior art)

In the repair work accompanying the cutting of the warp yarn, the reeds corresponding to the cut warp yarn must be specified. The patent applicant proposes a method for detecting the position of the reed by the invention of Japanese Patent Application No. 2-80227. The reed wing position detecting method is to displace a normal warp yarn having a specific positional relationship corresponding to a cut warp yarn, for example, a warp yarn on the left side in the vertical direction, and to detect a normal warp yarn in this displaced state near the reed wing. ,
The position of the reed corresponding to the cut warp yarn is specified. Thus, the position of the reed corresponding to the cut warp yarn can be accurately detected as a distance from the reference position on the weaving end side. Therefore, in the subsequent threading process, the feed guide device moves the threading device based on the distance from the reference position on the weaving end side to the position of the reed corresponding to the cut warp yarn, and cuts the threading needle and cuts the thread. Face the corresponding reed wings.

[Problems of prior art]

However, according to the above technology, the feed unit of the measuring system for measuring the distance from the reference position on the weaving end side to the reed corresponding to the cut warp yarn and the feed guide of the threading device from the same reference position to the reed position after detection. Since the feed unit of the system is configured as a separate feed unit, if an error occurs between those feed units, an error occurs between the reed wing corresponding to the cut warp yarn and the threading device after positioning. Occurs and the threading operation cannot be performed.

[Object of the invention]

Therefore, an object of the present invention is to eliminate an error between the detection position between the reeds corresponding to the cut warp yarn and the positioning of the threading device based on this detection position, and to execute the threading operation after the positioning without any trouble. Is to do so.

[Solution of the Invention]

Accordingly, the present invention provides a process of detecting a normal warp yarn having a specific positional relationship with a cut warp yarn by a yarn sensor.
The feed moving means of the yarn sensor in the weaving width direction and the feed moving means of the threading device are constituted by the same feed unit, and are integrally attached to the feed portion of the thread sensor.

[Function of the invention]

In the process of detecting the reeds corresponding to the cut warp yarns, a specific positional relationship with respect to the cut warp yarns, for example, a state in which a normal warp yarn on the left side is vertically displaced is set. Thereafter, the yarn sensor moves in the weaving width direction along the reed from the standby position on the weaving end side by the feed moving means, and detects a normal warp yarn in a displaced state. At this time, the threading device is also moving together with the thread sensor.

Therefore, when the yarn sensor detects a normal warp yarn in a displaced state, the threading device is located near the reed wing corresponding to the cut warp yarn. The determination circuit determines the positional relationship between the reed dent corresponding to the cut warp and the reed dent corresponding to the normal warp in the displaced state from the number of the heald frame corresponding to the cut warp or the identification code attached to the dropper in the falling state. The amount of deviation between the reed wing corresponding to the cut warp yarn and the threading device is determined from the amount of deviation between the yarn sensor and the threading device in the weaving width direction and the above-described determination result. Then, after the yarn sensor detects a normal warp yarn in the displaced state, the threading device moves in the advance or retreat direction by an amount corresponding to the deviation amount, so that the threading device can cope with the cut warp yarn with a small feed amount. It is accurately positioned between the reeds.

As described above, since the thread sensor and the threading device are attached to the same feed moving means, no error occurs between the detection position of the specific warp yarn detected by the thread sensor and the positioning position of the threading device. The operation failure due to the error is eliminated.

〔Example〕

1 to 10 show a reed wing position detecting process.

As shown in FIG. 1, during weaving, for example, when one of the many warp yarns 1 breaks, the corresponding dropper 3 falls, so that the warp stopping device 2 includes the cut warp yarns 1a,
The cutting state of 1b is detected, a vertical stop signal is generated, and the loom is automatically stopped at a predetermined stop angle. In the subsequent repair of the cut warp yarns 1a and 1b, all the heald frames 4 are set at substantially the same level by a leveling device (not shown). Therefore, all the warp yarns 1 are in the closed state. The warp yarn 1 is formed in a sheet shape, and is passed through, for example, the healds 5 of the four heald frames 4 in a predetermined repetition order. The woven fabric 8 is interwoven with the weft yarn 7 at 81. In this way, the two warp yarns 1 inserted between the two reed wings 6 always have a fixed relationship with the number of the heald frame 4 supporting the warp yarns 1. .

Next, a separation device (not shown) is disclosed in, for example, JP-A-62-6985.
The apparatus disclosed in Japanese Patent Application Laid-Open Publication No. 63-63139 can be used to reciprocate the dropper 3 in the falling state in the weaving width direction by using the apparatus disclosed in Japanese Patent Laid-Open No.
The normal warp yarn 1 adjacent to the cut warp yarns 1a, 1b is cut in a direction away from the cut warp yarns 1a, 1b by twisting the dropper 3 in the falling state by the apparatus disclosed in Japanese Patent No. 28951.

Then, as shown in FIG. 2, a pair of separating members 11 are inserted from below into the small space of the warp 1 after being separated in the vicinity of the warp fixing device 2, and each of the cut warp yarns is cut.
Move in the weaving width direction away from 1a and 1b. After that, the separation member 11 moves to the vicinity of the heald frame 4 in a state of being inserted into the space. With this, the cut warp yarn 1
a and 1b are set in a state where they can be easily taken out while forming a sufficient space with respect to other normal warp yarns 1. In addition,
The pair of separating members 11 are separated in Japanese Patent Application Laid-Open No. 1-192853, etc., move in the weaving width direction by a belt or the like, rise by a vertical air cylinder, or the like, and move in the weaving width direction. Therefore, it is driven in a direction to separate the warp yarn 1. Thereafter, as described in Japanese Patent Application No. Hei 1-24673, the spun yarn 9 is added to the cut warp yarn 1a on the sending side by an adhesive type or mechanical knot type notter, and the tip of the spun yarn 9 is The cut yarn 1b and the corresponding reed dent 6 are held by the splice yarn holder 10 and the clamp holder or the suction holder 14 in the vicinity of the interval.

Next, the number of the heald frame 4 corresponding to the cut warp yarns 1a and 1b is detected by a method described later, and the determination circuit 37 described later detects the number “No” of the heald frame 4 corresponding to the detected cut warp yarns 1a and 1b. .1 "and the above threading order, the cut warp yarns 1a, 1b
With respect to the reed wings 6 corresponding to the warp yarns 1 on the left side, for example, the reed wings 6 corresponding to the cut warp yarns 1a and 1b are
It is determined and stored as a predetermined condition that it is positioned to the left by the reed pitch. Further, based on the cut warp yarns 1a and 1b, for example, it is determined that the number of the heald frame 4 for the second warp yarn 1 on the left is "No. 3", and the separation member 12 at the standby position is dropped. In the weaving width direction based on the position signal of the above, the cutting is stopped in the vicinity of the cut warp yarns 1a and 1b, and then advanced in the direction of the warp yarn 1, and the heddle frame 4 of "No. 3" as shown in FIG. To the position
o.3 ”regulates the movement of the heald 5 in the heald frame 4. Thereafter, since the left separating member 11 moves to the center, a predetermined positional relationship with the cut warp yarns 1a and 1b, that is, only the normal warp yarn 1 on the left side moves close to the cut warp yarns 1a and 1b. Next, the extraction member 13 moves in the weaving width direction from the standby position along the space between the heald frame 4 and the reed wings 6, and the cut warp yarn 1a,
Stops at the position immediately below the warp yarn 1 on the left of 1b and rises there, so that the corresponding warp yarn 1 is
Is guided to a position higher than the height of another normal warp yarn 1.

At this time, the warp yarn 1 on the left is guided only in the vertical direction along the interval between the reeds 6, and is displaced upward as shown in FIG. It is set to a state that can be identified. Moreover, the normal warp yarn 1 is
Since the position is regulated between the reeds 6, the position of the ascending warp 1 in the weaving width direction at least in the vicinity of the reeds 6 exactly matches the position of the corresponding reed wing 6 in the weaving width direction. I have.

During this time, the pair of separating members 11 move in a direction approaching each other as shown in FIG. 5, thereby returning all the normal warp yarns 1 to a substantially parallel state. After this, the thread sensor
Reference numeral 22 denotes, for example, as shown in FIGS.
In the process of moving in the weaving width direction from the standby position near the front surface of the warp, the ascending warp yarn 1 is detected, and the position of the yarn sensor 22 in the weaving width direction at the time of detection is detected as the position of the warp yarn 1.

Then, based on the detected position and the predetermined condition, a position to the right by one reed pitch is obtained, and the position is determined to be a reed position corresponding to the cut warp yarns 1a and 1b. As shown in FIG. 6, after one of the separation members 11 is moved again, the cut warp yarns 1a and 1b are obtained from the determined result and the amount of displacement of the threading device 31 with respect to the yarn sensor 22 in the weaving width direction. The amount of movement up to the corresponding reed 6 is determined, and based on the determination result, the threading device 31 together with the yarn sensor 22 is determined.
Is moved to the interval between the reed wings 6 corresponding to the warp yarns 1a and 1b. Here, as shown in FIGS. 6 and 7, the threading device 31 has two reed wings 6 through which the cut warp yarns 1a and 1b pass.
Between the thread holder 10 and the suction holder 14 while passing the needle 32 with a hook through the mail of the corresponding heald 5.
By hooking and retracting the seam 9 between the two, the seam 9 is drawn between the corresponding heald 5 and the two reeds 6.

The drawn-in splice yarn 9 is cut by the cutter 34 near the splice holder 10 as shown in FIG. 8, and then held by the suction air flow of the suction pipe 33 at a position above the weave 81. You. The splice yarn 9 is not tied to the cut warp yarn 1b, but may be tied.

Thereafter, the pair of separating members 11, separating member 12, and extracting member 13 return to the original standby position after descending. Therefore, the normal warp yarn 1 and the warp yarns 1a and 1b after repair and the splicing yarn 9 are parallel on the same plane as shown in FIGS. 9 and 10, and are in an aligned state in which weaving is possible.

Since the subsequent weaving is started, the spun yarn 9 is woven into the woven fabric 8, so that the cut warp yarn 1a on the sending side is
It is woven into the woven fabric 8 together with the splicing thread 9. During weaving, the suction pipe 33 is at a fixed position while continuing the suction operation, or moves to the winding side as the weaving proceeds, but after a predetermined time has elapsed, or after inserting a predetermined pick, the standby position. Return to The portion where the end of the splicing yarn 9 of the woven fabric 8 exists is usually treated as a defective fabric.

For detecting the number of the heald frame 4 corresponding to the cut warp yarns 1a and 1b, for example, the following detection device 100 is used. That is, as shown in FIG. 12, in addition to FIG. 11, the detection device 100 is moved in the weaving width direction by an endless belt 102 wound around a pair of pulleys 101 driven by a drive motor (not shown). It is supported in a movable state,
The rack 105 is slidably held by the guide 103 in the direction of the warp yarn 1. The rack 105 is moved in the direction of the warp yarn 1 by the pinion 106 of the motor 104, and includes two sensors 108 and 109 in the upper end portion of the holder 107 at the tip thereof, in a horizontal direction and a downward direction. One horizontal sensor 108 is for detecting the heald 5 of the heald frame 4, and a downward sensor
109 is provided for specifying one of the plurality of heald frames 4. In the case of this embodiment, the four heald frames 4 are arranged in the direction of the warp yarns 1 as illustrated in FIG. 13, and four warp yarns 1 are successively obliquely passed one by one. By supporting and repeating this support mode, all the warp yarns 1 are held. Each of these warp yarns 1 is supported by a heald 5,
The two are passed through the space. Therefore, the two warp yarns 1 inserted between the two reed wings 6 have a fixed relationship with each other with respect to the number of the heald frame 4 supporting the warp yarns 1. The member through which the warp yarn 1 is inserted, for example, the heald 5, is provided with a unique identification code 45 corresponding to the number of the heald frame 4 that supports the heald. The identification code 45 is stored in the storage unit 41 constituting the determination circuit 37 for each warp thread 1 inserted between the same reeds 6.

Upon detection of the frame number, the detection device 100 moves forward in the direction of the cut warp yarn 1a, moves by a predetermined movement amount, and stops. Next, since the motor 104 is turned on and rotates in the normal rotation direction, both the sensors 108 and 109 move forward toward the heald frame 5. During this forward process, when the sensor 109 is turned on, it is detected that the first heald frame 4 has been reached, so that counting is started to detect the rotation amount of the motor 104. Thereafter, when the sensor 108 is turned on, the heald 5 is detected, the counting is stopped, and the frame number of the heald frame 4 is calculated from the counted rotation amount.
This counting is performed by a dedicated controller or the like.

For example, if the rotation amount of the motor 104 required to move one heald frame 4 is stored in advance, and the number of rotations of the counted motor 104 is calculated as a multiple of the stored rotation amount, Desired. Thereby, the cut warp yarns 1a, 1b
Is detected, ie, the heald frame number of the heald 5 through which is inserted. Next, the controller
Of the warp yarns 1a and 1b to the left of the warp yarns 1a and 1b from the identification code 45 and whether the warp yarns 1a and 1b pass between the same reed wings 6 or between the adjacent reed wings 6, respectively. Judgment, and after setting the predetermined conditions, the motor 104
Is turned on in the reverse direction, the sensors 108 and 109 are retracted, and if necessary, the drive motor (not shown) is turned on to shift only the detection device 100 in the weaving width direction.

Next, as shown in FIG. 14, the separating member 12 moves together with the guide 16 by moving the endless belt 15 in the weaving width and direction, and further, the rack 17 also serves as a slider.
And the pinion 181 of the motor 18 moves in the direction of the warp yarn 1 and advances in the weaving width direction by the air cylinder 19 supported by the bracket 171 integrated with the rack 17,
Only the corresponding heald 5 is regulated.

As shown in FIG. 15, the extracting member 13 is movable in the weaving width direction by a belt 20, and is supported by an upwardly directed solenoid 21 so as to be able to move up by a predetermined amount.

Further, as shown in FIG. 16, the yarn sensor 22 is provided with a guide bar 27 with respect to the tip of the piston rod 26 of the cylinder 25.
It is attached to the tip of the plate holder 28, which has been prevented from rotating. The cylinder 25 includes a guide bar 23 and a feed screw in the weaving width direction as feed means.
By 24, feed nut combined with slider 29 and motor
30 allows movement in the weaving width direction.
Therefore, the position between the reed wings 6 corresponding to the cut warp yarns 1a and 1b is the position at the time when the rising warp yarn 1 is detected by the yarn sensor 22, and the position between the reed wing 6 corresponding to the rising warp yarn 1 It can be determined from the positional relationship between the cut warp yarns 1a and 1b and the corresponding reed dents 6.

The threading device 31 is attached to the feed nut / slider 29 by a bracket 35. As a result, the yarn sensor 22 moves in the weaving direction integrally with the threading device 31.

The feed means may be constituted by a pair of pulleys 53, a belt 54, a speed reducer 55 and the like, as shown in FIG. 17, instead of the feed screw method.

The feed control during this movement is performed by the control circuit 36 in FIG.

After the normal warp yarn 1 is displaced in the vertical direction, the warp yarn repair control device 51 generates an operation command, sets the flip-flop 46 through the OR gate 43 inside the control circuit 36, and sets the contact 47 by the relay 50. Set to on state. Thereby, the drive amplifier 48 rotates the feed motor 30 at the speed set by the speed setter 42,
The yarn sensor 22 and the threading device 31 are moved in the weaving width direction from the standby position on the weaving end side. During this movement, the yarn sensor 22
Generates a detection signal when the normal warp yarn 1 in the displaced state is detected, and sets the flip-flop 46 to the reset state via the OR gate 44. This allows the motor
Since 30 stops, the yarn sensor 22 automatically stops at the position facing the normal warp yarn 1 in the displaced state.

The detection signal of the yarn sensor 22 is simultaneously input to the calculator 39. The arithmetic unit 39 calculates the positional relationship between the reed dent 6 corresponding to the cut warp yarns 1a and 1b and the reed dent 6 corresponding to the warp yarn 1 in the displaced state,
The shift amount between the reed wing 6 and the hook needle 32 corresponding to the cut warp yarns 1a and 1b is calculated from the shift amount between the yarn sensor 22 and the hook needle 32. For example, when the yarn sensor 22 is displaced from the hooked needle 32 of the threading device 31 as shown in FIG. At the time when the normal warp yarn 1 in the state is detected, the hooked needle 32 exactly faces the interval between the cut warp yarns 1a and 1b and the corresponding reed dents 6. Arithmetic unit 39
Is information on the positional relationship from the determination circuit 37, that is, data indicating that the reed dent 6 corresponding to the cut warp yarns 1a and 1b is located to the right of the reed dent 6 corresponding to the displaced warp yarn 1 by one reed pitch. It is determined from the input data and the amount of displacement between the yarn sensor 22 and the threading device 31 that the needle 32 with the hook is opposed to the space between the reeds 6 corresponding to the cut warp yarns 1a and 1b. As a result, the computing unit 39 outputs an operation command to the warp repair control device 51 to operate the threading device 31.

However, when the thread sensor 22 and the hooked needle 32 are provided with a shift of, for example, two reed pitches as shown in FIG. 19B, the arithmetic unit 39 calculates the shift amount, that is, the two reed pitches. From the information on the positional relationship input from the determination circuit 37, it is determined that the hooked needle 32 is shifted to the right by one reed pitch with respect to the interval between the cut warp yarns 1a and 1b and the corresponding reed 6; Data corresponding to one reed pitch is input from the pitch setting device 40, the flip-flop 46 is set again, and the motor 30 is rotated by one reed pitch in the feed direction.

Here, the judgment device 38 inside the judgment circuit 37
Based on the information of the heald frame numbers corresponding to 1a and 1b, the cut warp yarns 1a and 1b are
The positional relationship between the reed dent 6 corresponding to the normal warp yarn 1 having a predetermined positional relationship with the reed dent 6 corresponding to the normal warp yarn 1 and the cut warp yarns 1a and 1b is determined, and the determination result is used as positional relationship information as control circuit information.
It is sent to the computing unit 39 of 36. The storage device 41 contains the cut warp yarn 1
The specific relationship with the normal warp yarn 1 to be displaced corresponding to a and 1b, that is, the displacement of the warp yarn on the left of the cut warp yarns 1a and 1b in this embodiment and the heald frame number for each reed wing 6 Threading sequence data is input.

The arithmetic unit 39 sets the flip-flop 46 to rotate the motor 30 in the feed direction, and subtracts the value (one reed pitch) set in the pitch setting unit 40 as a shift amount for one reed pitch. Set 52 as a preset value. The feed speed at this time is set to a low speed. The count value of the subtraction counter 52 is the encoder
When the pulse is changed to “0” by the pulse from 49, the arithmetic unit 39 receives the signal and resets the flip-flop 46,
The motor 30 is stopped, an operation command is output, and the warp repair control device 51 is operated. Here, the warp repair control device 51 is configured to control the threading device based on the threading operation sequence.
Operate 31.

When the warp 1 is passed between the reeds 6 one by one, the judging device 38 inside the judging circuit 37 determines that the reed 6 corresponding to the cut warps 1a and 1b is displaced by the warp. The determination is made only from the predetermined positional relationship between the cut warp yarns 1a and 1b and the warp yarn 1 in the displaced state without determining the positional relationship with the reed wing 6 corresponding to 1.

20 and 21 are examples in which the separating member 12 is not used.

As shown in FIG. 20, the normal warp yarn 1 is separated from the warp yarns 1a and 1b by a pair of separation members 11 as in the previous embodiment, and the cut warp yarn 1a on the sending side is tied to the splice yarn 9 and spliced. The free end of the thread 9 is held. Thereafter, the extracting member 13 moves to the vicinity of the adjacent warp yarn 1. The amount of movement for this purpose is determined using a sensor that detects a position of the dropper 3 in a falling state or a position where the interval between the warp yarns 1 is large.

Thereafter, as shown in FIG. 20, the separating member 11 is lowered to return the normal warp yarn 1 to a parallel state. At this time, the normal 2 adjacent to the left side of the cut warp yarn 1a
The warp yarn 1 is located above the extracting member 13. Here, the raising of the extracting member 13 causes the two normal warp yarns 1 to be hooked by the hook portions 131 next to the cut warp yarns 1a and 1b.
On the other warp yarn 1 by the yarn sensor 22.
It is set at a high position so that it can be distinguished from. And
The yarn sensor 22 detects the warp yarn 1 on the right side of the two normal warp yarns 1 that are rising. Thereafter, the threading of the splicing thread 9 is performed in the same steps as in the above embodiment.

In any of the embodiments, the warp 1 to be displaced in the up-down direction only needs to have a predetermined positional relationship with the cut warp yarns 1a and 1b. A predetermined number of adjacent warp yarns 1 in the left or right direction from 1a and 1b may be used. In any case,
If a predetermined positional relationship is provided with respect to the cut warp yarns 1a and 1b, a predetermined condition can be obtained when the number of the heald frame 4 corresponding to the cut warp yarns 1a and 1b is detected. The predetermined condition is, as described above, detecting the number of the heald frame 4 corresponding to the cut warp yarns 1a, 1b and determining the number from the order of passing through the reed, or as described in JP-A-1-174649. As described above, if all the droppers 3 of the dropper device 2 are coded by the dropper codes and all the dropper codes are stored in correspondence with the respective reeds, the dropper codes of the dropped droppers 3 in the dropped state of the cut warp yarns 1a and 1b are obtained. You can also judge.

The method for detecting the number of the heald frame 4 is not limited to the above-described embodiment. For example, a well-known stopping device that detects the fall of the heald frame 5 and detects the cutting of the warp yarn 1 is applied, The frame number of the heald 5 may be detected.

〔The invention's effect〕

In the present invention, since the feed means of the sensor and the feed means of the threading device are also used, the feed means can be simplified, and the feed amount of the thread sensor is also the feed amount of the threading means as it is, After the detection of the specific warp by the yarn sensor, the feed amount of the threading device is not required or is small enough, so that the positioning of the threading device corresponding to the reed of the cut warp yarn is accurate, No positioning error as described above occurs, and therefore the positioning operation can be executed reliably.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 10 are explanatory diagrams of a reed wing position detecting step, FIG.
FIG. 13 to FIG. 13 are explanatory diagrams of a heald frame number detecting portion, and FIG.
FIGS. To 17 are perspective views of a mechanical drive portion, FIG. 18 is a block diagram of a control portion, FIG. 19 is an explanatory diagram of a predetermined positional relationship, and FIGS. 20 and 21 are other embodiments. FIG. DESCRIPTION OF SYMBOLS 1 ... Warp yarn, 1a, 1b ... Cut warp yarn, 2 ... Warp stop device, 3 ... Dropper, 4 ... Heald frame, 5 ... Heald, 6 ... Reed feather, 7 ... Weft yarn, 11, 12 ... Separating member,
13 ... Removal member, 22 ... Thread sensor, 30 ... Motor, 31 ...
… Threader, 32… Needle with hook.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D03D 51/20-51/32 D03J 1/16 D03J 1/02

Claims (2)

(57) [Claims] 1. A threading device which is provided movably in a weaving width direction and passes a splicing yarn between reeds for repairing a cut warp yarn, a yarn sensor provided integrally with the threading device, and a cut warp yarn With respect to a picking member for taking out a normal warp having a predetermined positional relationship between the heald and the reed and displacing the warp vertically in comparison with other warp yarns, and inputting information of a heald frame number corresponding to the cut warp yarn. A determination circuit for determining a positional relationship between a reed corresponding to a cut warp and a reed corresponding to a normal warp based on the threading order data relating to a heald frame number for each reed, and a yarn sensor. The warp in the displaced state is detected by moving the warp in the width direction, and based on the position of the yarn sensor at the time of detection and the determination result of the determination circuit, the reed position corresponding to the cut warp is specified. Operated through the device Warp repair apparatus characterized by comprising a that the control circuit. 2. A threading device provided movably in the weaving width direction to pass a splice yarn between reeds to repair a cut warp yarn, a yarn sensor provided integrally with the threading device, and a cut warp yarn An extraction member for taking out a normal warp having a predetermined positional relationship between the heald and the reed and displacing it vertically in comparison with other warp yarns, and a dropper device in which all droppers are coded by a dropper code When,
Enter the dropper code information corresponding to the cut warp yarn,
A determination circuit that determines a positional relationship between a reed corresponding to a cut warp and a reed corresponding to a normal warp based on threading order data related to a dropper code for each reed;
The yarn sensor is moved in the weaving width direction to detect a warp in a displaced state, and based on the position of the yarn sensor at the time of detection and the determination position of the determination circuit, a reed wing position corresponding to the cut warp yarn is specified, and the reed wing is concerned. And a control circuit for operating the threading device at a position.