JP2001140146A - Method for controlling start of loom, and weft-cutting cutter used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the content of works on the start of a loom to improve the success rate of the start. SOLUTION: A defective weft is subjected to a pick-finding treatment and then removed, and a loom is reversly rotated to a start-preparing position. The loom is then positively rotated to a cutting position. A weft from a picking nozzle 22 is fed into the cutting region of a cutter for cutting the weft in interlock with a reed 21 and automatically cut. The loom is reversly rotated to the start position, subjected to the weft-free beating operation of the reed 21 and then transferred to a normal operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loom start-up control method capable of simplifying the operation of the loom when starting up and reliably starting up the loom, and a weft cutting cutter used in the method.

[0002]

2. Description of the Related Art A fluid jet loom including a water jet loom and an air jet loom (hereinafter simply referred to as a loom).
Is provided with a cutter for cutting the weft between the weft insertion nozzle and the woven fabric, and the weft inserted into the warp opening during the operation of the loom is guided to the cutting area of the cutter with a beating motion, Automatically cut by closing the cutter after beating. Therefore, the weft end on the weft insertion nozzle side becomes the leading end of the next weft insertion yarn, and is inserted into the warp shedding one after another.

When the loom stops, the weft may come off from the weft insertion nozzle for some reason, or the weft may not be supplied to the weft insertion nozzle due to a yarn feeding problem. The nozzle may be pulled out long from the tip of the weft insertion nozzle. Furthermore, when the loom is stopped, there is a possibility that the winding amount of the weft in the weft length measuring device may be excessive or insufficient, so the winding amount is temporarily set to zero, and the excess weft is removed from the tip of the weft insertion nozzle. It may be pulled out and wound again. In this case, the surplus weft yarn is also drawn out from the tip of the weft insertion nozzle. The weft drawn out from the weft insertion nozzle in this manner is temporarily fixed to, for example, a temple cover on the woven fabric, and the weaving machine is started, so that the weft is trimmed to a predetermined length using an automatic cutter cutting function during operation. , The subsequent weft insertion can be ensured.

On the other hand, the loom is started up by reversing it from the start-up preparation position to the start-up position and shifting to a steady operation after a plurality of idle hits of the reed, thereby preventing weaving from occurring and starting weaving. be able to.

[0005]

In such a method for starting a loom, the reed and the weft cutting cutter are operated in conjunction with the main shafts, respectively. The timing is earlier than the beating timing of the reed, and the weft from the weft insertion nozzle cannot be correctly sent to the cutting area of the cutter using the reed movement. Because weft cannot be automatically cut to the specified length,
There was a problem that the loom after being started might stop immediately. Therefore, prior to starting the loom, the operator has to manually trim the weft from the weft insertion nozzle to a predetermined length, which makes the work complicated and requires that the loom be started quickly. There was a problem that was difficult.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to ensure that the weft from the weft insertion nozzle is fed into the cutting area of the cutter even when the loom is started up in reverse. An object of the present invention is to provide a loom starting control method that simplifies the work performed by an operator and can reliably start a loom, and a weft cutting cutter used for the method.

[0007]

According to a first aspect of the present invention for achieving the above object, a loom is started up from a starting position by reversing the loom, and a transition is made to a steady operation through idle reeding. The gist is to send the weft from the weft insertion nozzle to the cutting area of the weft cutting cutter in conjunction with the reed and automatically cut the weft in the cutting area of the cutter at least until the first weft insertion is performed. I do.

The weft can be fed into the cutting area of the cutter by rotating the loom forward.

The weft may be sent to the cutting area of the cutter by locking the cutter in the open state and rotating the loom in reverse. In this case, the lock of the cutter may be released at the cutting position.

[0010] Further, the weft in the cutting area of the cutter can be held via the locking portion.

The weft in the cutting area of the cutter may be automatically cut before the loom is started from the starting position.

According to a second aspect of the present invention, there is provided a fixed blade, a movable blade which is openably and closably coupled to the fixed blade, and a locking portion for holding a weft from a weft insertion nozzle fed in conjunction with the reed in a cutting area. The gist of the invention is that the movable blade is driven to open and close in conjunction with the main shaft of the loom.

[0013] A lock unit for locking the movable blade in the open state can be combined.

[0014]

According to the first aspect of the present invention, the loom comprises:
By appropriately rotating it forward or backward, the weft from the weft insertion nozzle is sent to the cutting area of the cutter in conjunction with the reed, and the closing action of the cutter automatically cuts the weft and smoothly shifts to steady operation. Can be done. Therefore, when starting up the loom, the worker interlocks with the reed to reliably feed the weft from the weft insertion nozzle into the cutting area of the cutter so as to intersect with the swing area of the reed, for example, on the temple cover. It is only necessary to temporarily fix and fix the weft at a predetermined position. However, it is sufficient that the weft sent to the cutting area of the cutter is automatically cut by the cutter after the loom is started and at least until the first weft insertion.

The work of fixing the weft from the weft insertion nozzle may be performed after the defective weft is removed in the case of restarting after a stoppage due to a poor weft insertion, or after the weaving machine is reversed to the start preparation position. You may. In the case of a general start other than the restart after the weft insertion failure, the weft fixing work may be performed as a part of the start preparation work. In addition, the weft from the weft insertion nozzle rotates the main shaft of the loom forward or backward,
It may be sent directly to the cutting area of the cutter through a reed that moves back and forth in conjunction with the main shaft, or may be sent through an appropriate auxiliary member that is linked to the reed.

When the weft is fed into the cutting area of the cutter by rotating the loom forward, the cutter and reed are driven in accordance with a regular operation pattern in conjunction with the main shaft, and therefore, the normally inserted weft is cut. The operation may be performed in the same manner as when the operation is performed. In other words, the cutter can rotate the loom further forward and cut the weft reliably and automatically.By holding the weft in the cutting area through the locking portion, the cutter can rotate the loom in reverse to cut the weft. it can.

By locking the cutter in the open state and rotating the loom in reverse, the weft can be fed into the cutting area of the cutter by utilizing the forward movement of the reed. Therefore, the cutter at this time can automatically cut the weft by releasing the lock and rotating the loom forward or reverse, and by releasing the lock at the cutting position, the weft can be automatically cut without rotating the loom. Can be cut. The cutting position at this time is set to a position where the cutter is normally closed after the weft is fed into the cutting area of the cutter.

The weft held in the cutting area of the cutter via the locking portion can be automatically cut without fail by closing the cutter when the loom rotates forward or backward. However, the locking portion may be formed on, for example, one or both of the fixed blade and the movable blade of the cutter, or may be formed on a locking member attached to the cutter. In addition, the weft at this time can be sent to the cutting area of the cutter in conjunction with the reed by rotating the loom forward or backward.

If the weft is automatically cut from the start position to the start of the loom, a sufficiently long time can be provided between the cutting of the weft and the first weft insertion, and the loom can be started more reliably. .

According to the structure of the second invention, the locking portion is
Since the weft from the weft insertion nozzle sent in conjunction with the reed is held in the cutting area, the weft remains in the cutting area even if the reed retreats, and the movable blade closes in conjunction with the main shaft of the loom. The automatic cutting can be surely performed.
The locking portion may be formed on one or both of the fixed blade and the movable blade, or may be formed on a locking member different from the fixed blade and the movable blade.

When the lock unit is combined, the lock unit can lock the movable blade, which opens and closes in conjunction with the main shaft, in an open state, so that the weft from the weft insertion nozzle can be reliably cut off when the loom rotates in the reverse direction. To be held in the cutting area via the locking portion.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

The start control method of the loom is performed by a loom having the main motor M, the main shaft 12, the reed 21, and the cutter 31 (FIGS. 1 and 2).

The reed 21 holds a large number of reeds 21b, 21b... Via a reed frame 21a.
The upper threads Wa, Wa... and the lower threads Wb, Wb. The reed 21 is mounted on a common lead holder 23 together with the weft insertion nozzle 22.
4 are held by a plurality of sleeves 23a, 23a,. The locking shaft 24 is connected to the main shaft 12 via a crank mechanism (not shown). Therefore, the reed 21 and the weft insertion nozzle 22 can reciprocately rotate the locking shaft 24 in the forward and reverse directions in conjunction with the main shaft 12 to swing back and forth. Also, the weft insertion nozzle 22
Are fixed to the lead holder 23 via the bracket 22a, and along the front surface of the reed 21 via the water jet or the air jet, the upper thread Wa, Wa..., The lower thread Wb
, Wb... Can be inserted into the warp opening Wc.

The cutter 31 is configured such that a movable blade 31b is openably and closably combined with a fixed blade 31a fixed to a frame (not shown), and the reed 21, the weft insertion nozzle 22 and the woven fabric W It is arranged between the cloth fell W1. A drive shaft 31c is connected to the movable blade 31b, and the drive shaft 31c is connected to the main shaft 12c via a cam mechanism 32.
It is connected to. The cutter 31 can open and close the movable blade 31b with respect to the fixed blade 31a in conjunction with the rotation of the main shaft 12.

In front of the weaving cloth W1, temples 41, 41 are arranged in order to prevent the woven cloth W from shrinking in the width direction immediately after weaving. However, it is assumed that a pair of front and rear temples 41 are arranged on both sides in the width direction of the woven fabric W. Each temple 41 is rotatably mounted on a fixed frame (not shown), and sandwiches the woven fabric W via temple covers 42, 42. Front and rear temple covers 42,
Reference numerals 42 are each formed in a semicircular cross section suitable for the temple 41, and are integrally connected. The temple covers 42, 42 are fixed to a fixed frame (not shown), and a guide bar 43 for pressing the woven fabric W is attached to the temple cover 42 on the front side W1.

A main motor M, a brake B,
The encoder EN is connected, and the main motor M and the brake B control signals S3 and S3 from the control circuit 11, respectively.
Controlled via 4 The control circuit 11 includes:
The weft insertion signal S1 from the weft feeler WF and the operation signal S2 from the operation switch SW are individually input, and the crank angle θ of the loom is input from the encoder EN.

When the operation switch SW is pressed, the control circuit 11 starts the main motor M, rotates the main shaft 12 forward at a predetermined rotation speed, and operates the loom in a steady state (FIG. 3). At this time, the reed 21 swings back and forth together with the weft insertion nozzle 22 at each cycle number N, and the crank angle θ = 0 °.
At the beating position of the forward limit at the crank angle θ =
Retreat to the retreat limit at 180 °. Further, the weft insertion nozzle 22 inserts the weft Y at 105 ° ≦ θ ≦ 265 °, the cutter 31 closes at 30 ° ≦ θ ≦ 100 °, and is normally inserted at the previous cycle number N,
Weft yarn Y from weft insertion nozzle 22 beaten on weave W1
Is automatically cut to a predetermined length. However, the reed 2 shown in FIG.
1. Each operation timing of the weft insertion nozzle 22 and the cutter 31 is merely an example.

When the weaving machine is operating normally, if a weft insertion failure occurs at cycle number N = Ns in FIG. 3, it is detected via a weft insertion signal S1 from the weft feeler WF. Therefore, the control circuit 11 cuts off the power supply of the main motor M, activates the brake B, shifts the loom to the braking operation, and stops at the stop position of the next cycle number N = Ns + 1 at the crank angle θ ≒ 180 °. Let it.

When the loom stops at the stop position, the loom is reversed by about one cycle to the discharge position at the cycle number N = Ns where the weft insertion failure has occurred, and the defective weft is discharged and removed. Thereafter, the weft yarn Y from the weft insertion nozzle 22 is moved to, for example, the guide bar 43 so as to intersect the swinging area of the reed 21.
Then, the loom is reversed by about one cycle to the start preparation position of the cycle number N = Ns -1 before the occurrence of the weft insertion failure (FIG. 3). Note that a series of operations from the stop position to the start preparation position may be performed manually by an operator or automatically by an appropriate automatic device. Further, the weft Y from the weft insertion nozzle 22 may be fixed to the guide bar 43 after the loom is rotated to the start preparation position. Further, the weft insertion nozzle 22
Before fixing the weft Y from the
Inserting and resetting the weft Y into the weft insertion nozzle 22,
Resetting of the winding amount in the weft length measuring device or the like may be performed as needed.

When the loom is reversed to the start preparation position,
The control circuit 11 is operated by pressing the operation switch SW.
The loom is rotated forward to the cutting position of cycle number N = Ns. At this time, the reed 21 is advanced from the retreat limit (the one-dot chain line in FIG. 4A) to the advance limit (the two-dot chain line in FIG. 4A), so that the upper thread Wa, Wa... Is sent to the cutting area CA of the cutter 31, and the cutter 31 can automatically cut the weft Y sent by the reed 21 (FIGS. 3 and 4B). That is,
The cutter 31 can cut the weft Y from the weft insertion nozzle 22 to a predetermined length by rotating the loom forward to the cutting position of the cycle number N = Ns and closing the movable blade 31b.

When the loom is rotated forward to the cutting position, the control circuit 11 reverses the loom to the start position of the cycle number N = Ns-2 (FIG. 3), and immediately restarts the loom to perform steady operation. Move to At this time, the weft insertion nozzle 22
Does not insert the weft yarn Y at the cycle numbers N = Ns-2 and Ns-1, but hits the reed 21 on the cloth fell W1, and inserts the weft yarn Y normally after the cycle number N = Ns. Is returned to the normal operation, and weaving is resumed. The starting position is set to an arbitrary cycle number N = Ns-i, regardless of FIG. 3, so that the regular beating force is applied to the weft Y inserted in the cycle number N = Ns.
(I = 1, 2,...), And the number of idle hits of the reed 21 can be appropriately set.

[0033]

[Other Embodiments] A cutter 31 has a locking member 31 having a locking portion 31d1 for a fixed blade 31a and a movable blade 31b.
d may be combined (FIG. 5). Locking member 3
1d is fixed along a fixed blade 31a to a bracket 31e to which the fixed blade 31a is attached, and a stepped locking portion 31d1 is formed to protrude toward the movable blade 31b. The locking member 31d includes a fixed blade 31a, a movable blade 3
Locking portion 31d in the cutting area CA of the cutter 31 by the
1 is set to be located. In addition, movable blade 3
The drive shaft 31c for opening and closing the opening and closing 1b includes a bracket 31e.
Is rotatably penetrated, and is connected to one end of a connecting rod 33 via an arm 31c1.

The connecting rod 33 is connected to one end of a swinging bell crank 34 via a shaft 34a, and the other end of the bell crank 34 is connected to a plate cam 35 via a cam follower 34b.
Is engaged with the outer periphery of the. The plate cam 35 has an engagement recess 35a.
And is connected to the main shaft 12. In the middle of the connecting rod 33 penetrating the fixing bracket 33a, the fixing bracket 33a and the stopper 3 on the arm 31c1 side are provided.
A compression spring 33c is mounted between the compression spring 33c and the compression spring 33c. The compression spring 33c urges the connecting rod 33 toward the arm 31c1 and urges the cam follower 34b toward the outer periphery of the plate cam 35 via the bell crank 34.

The cutter 31 is combined with a lock unit 36 composed of a solenoid 36a and an arm 31c2. The arm 31c2 is provided with a drive shaft 31c of the cutter 31.
And the rod 36b of the solenoid 36a
Can move forward in the axial direction and engage with the arm 31c2 (two-dot chain line in FIG. 5). The solenoid 36a
Can be driven via a control signal S6 from the control circuit 11.

When the rod 36b of the solenoid 36a is retracted (solid line in FIG. 5), the arm 31c2 becomes free. Therefore, the connecting rod 33 at this time moves forward to the arm 31c1 side via the bell crank 34 and the compression spring 33c because the cam follower 34b corresponds to the engaging concave portion 35a of the plate cam 35 (in the direction of the arrow K3 in the figure). ), The movable blade 31b can be closed with respect to the fixed blade 31a via the arm 31c1 and the drive shaft 31c. When the cam follower 34b is located at a portion other than the engagement recess 35a of the plate cam 35, the connecting rod 33 retreats toward the bell crank 34 against the compression spring 33c, and moves the movable blade 31b upward with respect to the fixed blade 31a. To open. That is, the cutter 31 moves the plate cam 35 and the bell crank 3 in conjunction with the rotation of the main shaft 12.
4, engaging recess 3 via connecting rod 33 and drive shaft 31c.
The predetermined crank angle θ of each cycle number N corresponding to 5a
, And operates to open in other ranges.

When the rod 36b of the solenoid 36a is advanced and engaged with the arm 31c2 (two-dot chain line in the figure), the drive shaft 31c is prohibited from rotating the movable blade 31b in the closing direction, and the cutter 31 Regardless of the rotation of the cam 35, the movable blade 31b is locked with the movable blade 31b opened upward with respect to the fixed blade 31a. At this time, the cam follower 3
4b, the bell crank 34 is provided with an engagement recess 35 of the plate cam 35.
Without following a, the connecting rod 33 is kept retracted toward the bell crank 34, and the cutter 31 can be locked in the open state via the lock unit 36.

By using the cutter 31 of FIG. 5, the loom can be restarted according to the operation explanatory diagram of FIG.

That is, when the loom stops at the stop position of the cycle number N = Ns + 1 due to the poor weft insertion, the defective weft is discharged and removed at the cycle number N = Ns, and the crank angle of the cycle number N = Ns-1. θ = 180
The cutter 31 is rotated backward to the start preparation position corresponding to °, and the cutter 31 is locked in the open state via the lock unit 36. Thereafter, when the operation switch SW is pressed, the loom is reversed from the start preparation position to the start position of the cycle number N = Ns-2, and the cutter 31 at this time is locked in the open state. = Reed 2 at Ns -1
By the forward movement of 1, the weft Y from the weft insertion nozzle 22 can be reliably fed into the cutting area CA of the cutter 31 (the dashed line and the dashed line in FIG. 7A).

The weft Y is cut in the cutting area C of the cutter 31.
A, the reed 21 moves forward and the locking portion 31
forward beyond d1, then cycle number N = Ns
At -2, the reed 21 retreats as it retreats from the forward limit and is retained by being retained by the retaining portion 31d1. That is,
The cutter 31 is connected to the weft insertion nozzle 2 via the locking portion 31d1.
2 can be held in the cutting area CA.

When the loom is further rotated to the start position of the cycle number N = Ns-2 (FIG. 6), the lock of the open state of the cutter 31 by the lock unit 36 is released, and the loom is restarted. It is possible to shift to the steady operation through the idling operation. At this time, since the lock is released, the cutter 31 opens and closes in conjunction with the main shaft 12 and closes at the cycle number N = Ns−1, whereby the weft Y held in the cutting area CA can be automatically cut. (FIG. 7 (B)).

In FIG. 6, the cutter 31 may unlock the open state at a timing other than the start position. That is, the cutter 31 is attached to the weft insertion nozzle 22.
After the weft Y is fed into the cutting area CA of the cutter 31, the loom is rotated to the start position and started up, and the open state is locked at an arbitrary timing until the first weft insertion is performed in the cycle number N = Ns. Can be canceled.

The loom uses the cutter 31 shown in FIG.
It can also be controlled as follows.

That is, when the weaving machine removes the defective weft and reverses to the start preparation position of the cycle number N = Ns-1, the cutter 31 is locked in the open state via the lock unit 36, and the operation switch SW is pressed. By operation, it is reversed to the cutting position of the cycle number N = Ns-2 beyond the starting position. Here, the cutting position means a position where the cutter 31 closes according to a regular operation pattern in the cycle number N = Ns-2. On the other hand, since the cutter 31 at this time is locked in the open state, at the cycle numbers N = Ns-1, Ns-2, the cutter 31 is interlocked with the reed 21 via the locking portion 31d1 as in FIG. The weft Y from the weft insertion nozzle 22 sent to the cutting area CA can be held in the cutting area CA.

Next, the cutter 3 by the lock unit 36
When the lock in the open state of 1 is released, the cutter 31 at the cutting position is immediately closed and the weft Y is automatically cut. Therefore,
The loom may be rotated forward to the start position of the cycle number N = Ns−2, restarted, and shifted to the steady operation through the idle driving of the reed 21.

In FIG. 6 and FIG.
May be locked in the open state via the control circuit 11 after the operation switch SW is pressed, instead of locking the operation state before the operation switch SW is pressed. 6 and 8, the cutter 31 has a cycle number N = N.
At s-1, the open state lock may be immediately released and the weft Y may be automatically cut without holding the weft Y from the weft insertion nozzle 22 sent to the cutting area CA. This is because the cutter 31 is at the cutting position of the cycle number N = Ns -1 when the weft Y is fed into the cutting area CA. Further, when the weft Y is fed into the cutting area CA, the cutter 31 in FIGS. 6 and 8 rotates the loom forward without releasing the weft Y and unlocks the open state, and releases the cycle number N = Ns. The weft Y may be automatically cut at the cutting position. When the weft Y is not held in this way, the cutter 31 does not need to be provided with the locking member 31d.

The loom can be restarted as shown in FIG. 9 without locking the cutter 31 of FIG. 5 in the open state. In this case, the cutter 31 does not need to be provided with the lock unit 36.

When the operation switch SW is pressed and operated in the start preparation position of the cycle number N = Ns-1, the loom is
Rotate forward to the holding position. The holding position is the cutter 3
1 is in an open state, the weft Y from the weft insertion nozzle 22 is fed into the cutting area CA of the cutter 31 over the locking portion 31d1 by the forward movement of the reed 21, and the weft Y is fed through the locking portion 31d1. It is a position that can be held, and is preferably set at least before the reed 21 reaches the advance limit.

Next, the loom is reversed from the holding position of the cycle number N = Ns-1 to the starting position of the cycle number N = Ns-2. At this time, the weft Y in the cutting area CA is held by the retreating reed 21 via the locking portion 31d1,
The cutter 31 can cut the weft yarn Y at the closing timing of the cycle number N = Ns-1. Thereafter, the loom may be shifted to the steady operation through the idle driving of the reed 21.

In the above description, the cutter 31 is different from the fixed blade 31a in that the locking portion 31d1 is formed on the movable blade 31b side instead of forming the locking portion 31d1 on the locking member 31d. 31a1 may be formed (FIG. 10).
The locking portion 31a1 can hold the weft Y in the cutting area CA of the cutter 31.

In the lock unit 36, the rod 36b of the solenoid 36a may be engaged with the bell crank 34 (FIG. 11), and the arm 31c2 of the drive shaft 31c may be omitted. That is, the solenoid 36a is connected to the rod 36b
The cam follower 34b of the bell crank 34 is cut off from the outer periphery of the plate cam 35 (in the direction of the arrow K6 in the figure), and the cutter 31 can be locked in the open state. The lock unit 36
Can lock the cutter 31 in an open state by using any drive source other than the solenoid 36a and restraining any members of a series of drive mechanisms for driving the cutter 31.

The present invention can be widely and generally applied not only to the restart of the loom after the weft insertion failure but also to the start of other looms. Further, it is preferable to set the cutting timing of the weft Y from the weft insertion nozzle 22 by the cutter 31 until the loom is started from the starting position (FIGS. 3, 8, and 9), but the loom is started from the starting position. It may be set after having been made (FIG. 6). However, even in the latter case, the cutting timing is set at least until the first weft insertion after the start is performed.

[0053]

As described above, according to the first aspect of the present invention, the weft from the weft insertion nozzle is fed into the cutting area of the cutter in conjunction with the reed to automatically cut the loom, thereby enabling the loom to operate in a steady state. By shifting, it is not necessary to trim the weft from the weft insertion nozzle by hand, and the work content of the operator when starting the loom can be simplified, and the loom can be started quickly. Since the weft can be accurately cut automatically to a predetermined length, there is an excellent effect that the success rate of starting the loom can be improved and the operation rate can be improved.

According to the second aspect of the invention, by providing the locking portion in addition to the fixed blade and the movable blade, the weft from the weft insertion nozzle can be held in the cutting area via the locking portion. When the loom is started by automatically cutting the loom, there is an effect that various control modes of the loom can be set.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part of a loom.

FIG. 2 is an explanatory view of a main part configuration of a loom.

FIG. 3 is an operation explanatory diagram (1).

FIG. 4 is an explanatory diagram of an operation of a main part (1).

FIG. 5 is an enlarged perspective explanatory view of a main part showing another embodiment (1).

FIG. 6 is an operation explanatory diagram (2).

FIG. 7 is an explanatory diagram of main part operation (2).

FIG. 8 is an operation explanatory diagram showing another embodiment (1).

FIG. 9 is an operation explanatory diagram showing another embodiment (2).

FIG. 10 is an enlarged perspective view of an essential part showing another embodiment (2).

FIG. 11 is a schematic explanatory view showing another embodiment.

[Explanation of symbols]

 Y: weft CA: cutting area 12: spindle 21: reed 22: weft insertion nozzle 31: cutter 31a: fixed blade 31b: movable blade 31a1, 31d1: locking part 36: lock unit

Claims (8)

[Claims] 1. Starting the loom from a starting position by reversing the loom,
When shifting to steady operation after reed blanking, the weft from the weft insertion nozzle is sent to the cutting area of the weft cutting cutter in conjunction with the reed, and the cutter cutting area at least until the first weft insertion is performed. A start-up control method for a loom, characterized by automatically cutting a weft in a loom. 2. The method according to claim 1, wherein the weft is fed into a cutting area of the cutter by rotating the loom forward. 3. The method according to claim 1, wherein the weft is sent to a cutting area of the cutter by locking the cutter in an open state and reversing the loom. 4. The method according to claim 3, wherein the cutter is unlocked at the cutting position. 5. The weft in the cutting area of the cutter is held via a locking portion.
A method for controlling the activation of a loom according to any one of the above. 6. The start-up control method for a loom according to claim 1, wherein the weft in the cutting area of the cutter is automatically cut before starting the loom from the start position. 7. A fixed blade, a movable blade combined with the fixed blade so as to be openable and closable, and a locking portion for holding a weft from a weft insertion nozzle fed in conjunction with a reed in a cutting area, The movable blade is driven to open and close in conjunction with the main shaft of the weaving machine. 8. The cutter for weft cutting according to claim 7, wherein a lock unit for locking the movable blade in an open state is combined.