JPH09228196A - Apparatus for preventing weaving bar in loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a weaving bar from occurring in a loom equipped with a negative easing device. SOLUTION: This apparatus for preventing a weaving bar from occurring in a loom is obtained by rotatably supporting a back roller 13 on supporting brackets 31 and 32 on back bracket 25 and 26, securing easing levers 27 and 28 to a roller shaft 131 of a back roller 13 and rotatably supporting an easing roller 14 on the easing levers 27 and 28, further securing braking plates 30 made of a magnetic material to the roller shaft 131 and installing electromagnets 43 on the back brackets 25 and 26. The braking plates 30 are integrally shaken with the roller shaft 131. When the electromagnets 43 are excited, the braking plates 30 are attracted to attraction surfaces 431 to prevent the braking plates 30 from shaking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weaving bar preventing device in a loom equipped with a depolarizing easing device which absorbs fluctuations in the tension of a warp by a spring force through an easing body which is in contact with the warp.

[0002]

2. Description of the Related Art When a loom is stopped, warp yarns are stretched by the tension of the warp yarns, and the cloth fell is displaced from its normal position. When the cloth fell from the normal position, the repulsion point at the time of restarting the weaving is deviated and a so-called stop step occurs. Therefore, as disclosed in, for example, Japanese Patent Application Laid-Open No. 56-144258, measures are taken to correct the position of the cloth fell by applying tension to the warp when the weaving is resumed.
In this conventional device, the engagement body driven by the air cylinder comes into contact with the warp threads to give a particular tension.

[0003]

However, a loom adopting a depolarizing easing device in which a spring absorbs fluctuations in the tension of the warp via an easing roller (a back roller in the device of Japanese Patent Laid-Open No. 56-144258) that is in contact with the warp. Then, a part of the load applied to the warp by the engagement body is absorbed by the spring. Therefore, the tension to be applied to the warp cannot be obtained, and the cloth fell cannot be placed at the regular position. Therefore, there is still a possibility that a stop step will occur.

SUMMARY OF THE INVENTION It is an object of the present invention to reliably prevent generation of a weft bar in a loom equipped with a depolarizing easing device.

[0005]

Therefore, in the invention of claim 1, the weaving bar preventing device is provided with an easing preventing means for releasably fixing the easing body of the weaving bar preventing device.

According to the invention of claim 1, by fixing the easing body by the easing preventing means, the load applied to the warp is used as it is for changing the tension of the warp. According to a second aspect of the present invention, there is provided a weft bar preventing device including switching control means for switching the easing prevention means between a blocking mode for fixing the easing body and a releasing mode for releasing the easing body.

According to the invention of claim 2, when the switching control means switches from the release mode to the blocking mode, the easing body is fixed. When the switching control means switches from the blocking mode to the release mode, the fixing of the easing body is released.

According to the third aspect of the invention, the switching control means has a function of setting the easing prevention means in the easing prevention mode in response to the input of the easing prevention signal and setting the easing prevention means in the release mode in response to the input of the release signal. Granted to.

According to the third aspect of the invention, when the easing blocking signal is input, the switching control means switches from the release mode to the blocking mode and the easing body is fixed.
When the release signal is input, the switching control means switches from the blocking mode to the release mode, and the fixing of the easing body is released.

According to the fourth aspect of the invention, the easing prevention timing is grasped based on the input of the easing prevention signal. According to the invention of claim 4, the switching control means grasps the easing prevention timing based on the input of the easing prevention signal and switches the easing prevention means to the prevention mode.

According to the fifth aspect of the invention, the easing prevention release timing is grasped based on the input of the release signal. According to the invention of claim 5, the switching control means grasps the easing prevention release timing based on the input of the release signal and switches the easing prevention means to the release mode.

In the invention of claim 6, the switching control means sets the easing prevention means to the release mode after the cloth fell movement amount grasped by the cloth fell movement amount detection means reaches a predetermined amount after the release signal is input. I decided to do it.

According to the sixth aspect of the invention, the switching control means grasps the easing prevention release timing when the cloth fell movement amount after the release signal is input reaches a predetermined amount.

In the seventh aspect of the invention, the weft insertion error process completion signal output from the weft processing device is used as the release signal. When the weft processing device that removes the miss thread that has made a weft insertion error outputs a weft insertion error processing completion signal, the switching control means grasps the easing prevention release timing based on the input of the weft insertion error processing completion signal, and the easing is performed. Switch the blocking means to the release mode.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 schematically shows a side view of the entire loom. M
Is a loom drive motor, and the loom drive motor M is controlled by a loom control computer C. Reference numeral 11 denotes a feed motor that can rotate forward and reverse independently of the loom drive motor M. The warp yarn T fed from the warp beam 12 driven by the feed motor 11 is passed through the heddle 15 and the reed 16 through the back roller 13 and the easing roller 14. The woven fabric W is wound around the cross roller 21 via the expansion bar 17, the surface roller 18, the press roller 19, and the wrinkle removing guide member 20. The surface roller 18 is operatively connected to a loom drive motor M. The surface roller 18 takes up the woven fabric W in cooperation with the press roller 19.

As shown in FIG. 2, back brackets 25, 2 are provided at the rear ends of the left and right side frames 23, 24 of the loom.
6 is fixed, and support brackets 31 and 32 are fixed to the upper ends of both back brackets 25 and 26.
The back roller 13 is rotatably supported between the support brackets 31 and 32. Back roller 13
The roller shaft 131 has easing levers 27 and 28 fixed thereto, and an easing roller 14 serving as an easing body is rotatably mounted and supported between the tips of the easing levers 27 and 28. Both ends of the roller shaft 131 penetrate the support brackets 31 and 32 and protrude to the side.

A tension lever 29 and a magnetic braking plate 30 are fixed to both ends of the roller shaft 131. A load cell 33 is suspended from the upper ends of the support brackets 31 and 32, and a screw rod 34 is fixed to the lower end of the load cell 33 in a suspended state. The screw rod 34 penetrates the tip end portion of the tension lever 29 in a loosely fitted state. A spring bearing 35 is attached to the tip of the screw rod 34.
And a compression spring 36 is interposed between the spring receiver 35 and the tension lever 29. The direction in which the spring force of the compression spring 36 acts is the direction in which the tension lever 29 is rotated leftward about the roller shaft 131, and the easing roller 14 is rotated by the spring of the compression spring 36 by rotating the tension lever 29 leftward. A load is applied to the warp yarn T. The warp tension is transmitted to the load cell 33 via the easing roller 14, the easing lever 27, and the tension lever 29, and the load cell 33 outputs an electric signal corresponding to the warp tension to the loom control computer C.

The loom control computer C compares the preset tension with the detected tension grasped by the input signal and based on the warp beam diameter grasped by the detection signal from the rotary encoder 37 for detecting the machine stand rotation angle. Control the rotation speed of the delivery motor 11. As a result, the warp tension during the normal operation is controlled, and the generation of the weaving step is prevented. The loom control computer C commands the forward rotation operation of the feed motor 11 based on the ON signal from the start switch 38, and rotates the feed motor 11 based on the rotation speed detection signal from the rotary encoder 111 incorporated in the feed motor 11. Feedback control the speed.

As shown in FIG. 2, the back bracket 2
Electromagnets 43 are attached to the side surfaces of 5, 26.
The attraction surface 431 of the electromagnet 43 is in contact with the braking plate 30. The braking plate 30 swings integrally with the roller shaft 131, but when the electromagnet 43 is excited, the braking plate 3
0 is adsorbed on the adsorption surface 431, and the swing of the braking plate 30 is prevented. The braking plate 30 and the electromagnet 43 constitute easing prevention means.

An input device 39 for controlling the displacement of the position of the cloth fell W1 of the cloth W is connected to the loom control computer C. The input device 39 inputs the displacement control data of the position of the cloth fell W1 to the loom control computer C. The flowcharts of FIGS. 3 and 4 show a cloth fell position displacement control program and an easing control program. The weaving machine control computer C controls the position of the cloth fell after weaving stop based on the cloth fell position displacement control program and the easing control program shown in this flowchart.

The loom control computer C stops the operation of the loom drive motor M and the delivery motor 11 in response to an abnormality detection signal from the weft insertion error detector 40, the warp cutting detector 41, or an ON signal from the stop switch 42. Command. This causes the motors M and 11 to stop synchronously,
The warp delivery and the winding of the cloth are stopped, and the reed 16 is stopped at the position immediately before the beating. The abnormality detection signal and the ON signal serve as an easing prevention signal.

The weaving stop signal S1 indicates the weft insertion error detector 40.
If it is, the loom control computer C first commands the excitation of the electromagnet 43. When the loom control computer C serving as the switching control means enters the excitation command state which is the blocking mode, the electromagnet 43 is excited. Warp T during weaving
Fluctuations in the tension of the easing roller 14, the easing levers 27 and 28, the roller shaft 131, and the tension lever 29.
Is transmitted to the compression springs 36, and the compression springs 36 absorb the fluctuations in the tension of the warp threads T. The braking plate 30 is attracted to the attraction surface 431 by the excitation of the electromagnet 43, and the braking plate 3
Oscillation of 0 is blocked. Therefore, the easing lever 2
The swinging of the easing roller 14 that constitutes the depolarizing easing device together with 7, 28, the roller shaft 131, the tension lever 29, and the compression spring 36 is prevented.

Next, the loom control computer C instructs the feed motor 11 to perform slow forward rotation by the set amount Q ⁺ input and set by the input device 39. That is,
When the weaving stop signal S1 relating to the weft error is input, the loom control computer C excites the electromagnet 43 and the predetermined amount Q ^{+ of the} feed motor 11 before the slow reverse rotation of the loom drive motor M for the weft insertion error process. Direct slow forward rotation only. The slow forward rotation of the feed motor 11 causes the warp T to be slowly fed by a predetermined amount ρ ₀ . The slow feeding of the warp yarns T causes the cloth fell W1 to move from the regular position to the woven cloth W side by a predetermined amount ρ ₀ .

When a weft insertion error occurs, the weft processing device 53 carries out a weft insertion error process. This weft processing device 5
3 performs the same weft-insertion error handling operation as the weft-handling apparatus disclosed in, for example, Japanese Patent Laid-Open No. 2-61138. This weft insertion mistake process is performed in a state in which the miss yarn woven on the cloth fell W1 is released from the grasping action of the warp yarn T, and the loom is thrown backward about one and a half times for this grasp release. Due to this slow reverse rotation, the reed 16 passes through the regular position of the cloth fell W1, that is, the repulsion position.

In the present embodiment, the weft processing device 53 includes a weft processing control computer C1. Sending motor 1
After the slow forward rotation of the predetermined amount Q ⁺ of 1, the loom control computer C sends a weft insertion error processing start signal to the weft processing control computer C1. The weft processing control computer C1 operates the weft processing device 53 in response to the input of the weft insertion error processing start signal.

After the forward rotation of the delivery motor 11 by a predetermined amount of slow forward rotation, the loom drive motor M performs slow reverse rotation about once and a half times, and the loom slow reverses to a position where the maximum opening of the warp T is formed.
As a result, the reed 16 moves to the last retracted position, and the warp yarn T forms the maximum opening. Due to the formation of the opening, the erroneous yarn on the cloth fell W1 is released from the gripping action of the warp T, and the weft insertion erroneous processing can be performed.

In synchronism with the slow reverse rotation of the loom drive motor M, the feed motor 11 performs slow reverse rotation. As a result, the warp yarn T is pulled back in proportion to the slow reverse rotation amount of the loom, and the woven fabric W is rewound in proportion to the slow reverse rotation amount of the loom. Synchronous pullback and synchronous rewind of the warp yarn T and the woven fabric W causes the cloth fell W1 to undergo a positional displacement corresponding to the slow reverse rotation amount of the loom.

While the reed 16 is moved from the stop position at the time when the loom is stopped to the last retracted position by the slow reverse rotation of the loom for about one and a half times, the reed 16 is passed through the regular cloth fell position, that is, the beating position. Therefore, when the cloth fell W1 is at the reed position, the cloth fell W1 is hit by the reed 16. However, before weaving slow reverse of the loom for weft insertion mistake processing, the cloth fell W
Since No. 1 has escaped from the reed hitting position P to the side of the woven fabric W, the cloth fell W1 is not hit by the reeds 16. Therefore, the weft threads in the vicinity of the cloth fell W1 which are not in a strong weaving state are not displaced in the vertical direction of the woven cloth W, and the twill pillow is not generated due to the weft insertion error process. A twill pillow is a kind of weave that is particularly likely to occur in twill weaving.

When the weft processing device 53 completes the weft processing operation, the weft processing control computer C1 sends a weft insertion error processing completion signal to the loom control computer C. The loom control computer C responds to the input of the weft insertion error processing completion signal.
Causes the loom drive motor M to reverse slowly, and the loom slowly reverses to the weaving start position immediately before the beating. This is to avoid insufficient beating power at the start of weaving. Even during this slow reverse rotation, the reed 16 passes through the beating position, but since the cloth fell W1 has escaped from the beating position P, the reed 16 is not hit and the twill pillow does not occur. Also, the loom drive motor M
The delivery motor 11 rotates in slow reverse in synchronization with. As a result, the cloth fell W1 is pulled back by an amount proportional to the slow reverse rotation amount to the weaving start position of the loom.

After the loom moves to the weaving start position by slow reverse rotation, the feed motor 11 performs slow reverse rotation by a predetermined amount Q ⁻ . As a result, the warp yarn T is slowly pulled back by the predetermined amount ρ ₀ , and the cloth fell W1 is displaced and returned to the normal position.

The loom control computer C grasps the rotation amount of the feed motor 11 based on the rotation angle information from the rotary encoder 111 of the feed motor 11.
This grasping of the rotation amount means grasping the movement amount of the cloth fell W1, and the rotary encoder 111 serves as a cloth fell movement amount detecting means. The loom control computer C receives the weft insertion error completion signal and the reverse rotation amount of the feed motor 11 reaches a predetermined reverse rotation amount Q ⁻ , that is, after the cloth fell W1 returns to the normal position, the loom control computer C. Command the demagnetization of the electromagnet 43.
The weft insertion error processing completion signal becomes a release signal for releasing the easing prevention, and the reverse rotation amount Q after the release signal is output.
^- a predetermined amount of movement of the cloth fell W1 corresponds to is grasped by the rotary encoder 111.

When the loom control computer C, which serves as switching control means, enters the demagnetization command state, which is the release mode, the electromagnet 43 is demagnetized. By demagnetizing the electromagnet 43, the electromagnet 43
The attraction of the braking plate 30 to the is released, and the easing roller 14 can swing. After that, the loom drive motor M and the feed-out motor 11 synchronously start the forward rotation operation, and the weaving is started.

When a weaving stop signal S2 other than a weft insertion error such as the input of a weaving stop signal from the warp cutting detector 41 or the stop switch 42 is input, the loom control computer C causes the start switch 38 and the slow reverse switch 4 to operate.
4 or the slow forward rotation switch 45 is provided with an ON signal input.

When the fabric damage on the woven fabric W is to be repaired, the slow reverse rotation switch 44 is turned on. Slow reverse switch 4
When the ON signal from 4 is input, the delivery motor 11 rotates in the forward slow direction by a predetermined amount Q ⁺ before the slow reverse rotation of the loom drive motor M. As a result, the cloth fell W1 moves from the regular position to the cloth W side, and the cloth fell W1 is not hit by the swing of the reed 16.

After the cloth fell W1 is released from the beating position, the loom drive motor M and the feed motor 11 synchronously make slow reverse rotation in response to the ON state of the slow reverse rotation switch 44. When the slow reverse rotation switch 44 is turned off, the operations of the loom drive motor M and the feed motor 11 are stopped, and then the feed motor 11 is slow reversely rotated by a predetermined amount Q ⁻ . As a result, the warp T is slowly pulled back by the predetermined amount ρ ₀ , the woven fabric W is slowly rewound by the predetermined amount ρ ₀ , and the cloth fell W1 is returned to the normal position. In this way, the cloth fell W1 withdraws from the beating action area of the reed 16 even when the slow reverse rotation is performed to recover the scratch, and the twill pillow is prevented from being generated due to the interference between the slow rocking reed 16 and the cloth fell W1. It

In the case of the scratch-recovering work, the slow reverse switch 44 is turned on and off by the number of weft yarns that need to be pulled out, and the slow forward switch 45 is used for the last cloth fell position adjustment. is there. Each motor M, 11 when the slow forward rotation switch 45 is turned on and off
In the case of the slow forward rotation, the cloth fell W1 is moved in the same manner as when the slow reverse rotation switch 44 is turned on and off.

When the weaving machine is stopped due to a weft insertion error, the loom automatically reverses to the predetermined weaving start position, but when the weaving machine is stopped for a reason other than the weft insertion error, the loom control computer C In response to the input of the ON signal from the start switch 38, the loom is slowly reverse-rotated to a predetermined weaving start position. Prior to the slow reverse rotation of the motors M and 11, the cloth fell W1 is moved in the same manner as described above, and after the slow reverse rotation of the loom to the weaving start position, the cloth fell W1 is returned to the normal position. The reed 16 passes through the beating position while the loom is slowly reversing to the weaving start position. However, since the cloth fell W1 has escaped from the beating position, the reed 16 is not hit by the reed 16.

The amount by which the cloth fell W1 is released from the normal position to the cloth W side is set to the required minimum amount so that the error at the cloth cloth restoration may be reduced depending on the kind of cloth. In the first embodiment, the following effects can be obtained. (1) The warp yarn T is fed by a predetermined amount by the slow forward rotation of the feeding motor 11 after weaving is stopped. However, even if the warp yarn T is fed by a predetermined amount while the easing roller 14 can swing, the spring force of the compression spring 36 causes the easing roller 14 to move.
The easing roller 14 moves in a direction to apply tension to the warp yarns T because it is transmitted to the warp yarns. Therefore, the cloth fell W1 does not move to the woven fabric W side by an amount corresponding to the predetermined amount of the warp T to be fed out, and the amount of the cloth fell W1 to escape from the regular position to the woven fabric W side may be insufficient. This lack of relief may lead to the occurrence of twill pillows. In the first embodiment, the cloth fell W
1 is released to the woven fabric W side, the braking plate 30 moves to the electromagnet 4
3, and the easing roller 14 is prevented from swinging. Therefore, the relief amount corresponding to the delivery amount of the warp yarn T is obtained, and the generation of the twill pillow which is a kind of weaving step is surely prevented. (2) The cloth fell W1 is pulled back to the normal position by slowing the feed motor 11 in reverse and pulling back the warp T. However, even if the warp yarn T is pulled back by a predetermined amount while the easing roller 14 is swingable, the spring force of the compression spring 36 is transmitted to the easing roller 14, so that the easing roller 14 absorbs the increase in the tension of the warp yarn T. Move to. Therefore, the cloth fell W1 may not be returned by the amount corresponding to the predetermined pullback amount of the warp T, and the cloth fell W1 may not be returned to the normal position. This lack of pullback amount causes a stop. In the first embodiment, when the cloth fell W1 is pulled back to the normal position, the braking plate 30 is attracted to the electromagnet 43 and the swinging of the easing roller 14 is blocked. Therefore, the return amount corresponding to the pullback amount of the warp yarn T is obtained, and the stop step is reliably prevented from occurring.

Next, a second embodiment shown in FIG. 5 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a flange 301 is formed at the lower end of the braking plate 30. The flange 301 fits inside the back bracket 25. An air cylinder 46 is attached to the back bracket 25, and a braking body 461 is fixedly attached to its drive rod. The back bracket 25 has a three-way valve type solenoid valve 4
7 is attached. Solenoid valve 47 is air cylinder 4
It controls the supply of compressed air to the No. 6 unit. Solenoid valve 4
The weaving machine control computer C performs excitation / demagnetization control for the device 7. When the solenoid valve 47 is demagnetized, the braking body 461 stands by at a position where it does not come into contact with the flange 301, and when the solenoid valve 47 is excited, the braking body 461 is held by the flange 3.
Touch 01. That is, the excitation command state of the loom control computer C is the blocking mode, and the demagnetization command state is the release mode. When the braking body 461 contacts the flange 301, the swinging of the easing roller 14 is blocked.

The following effects are obtained in the second embodiment. (1) The same effect as the first embodiment can be obtained. (2) Since the braking plate 30 is braked by the flange 301 farthest from the roller shaft 131, which is the center of rotation thereof, the braking force for preventing the easing roller 14 from swinging can be minimized. (3) Compared with the electromagnet 43 of the first embodiment, the air cylinder 46 is likely to generate a large braking force.

Next, a third embodiment shown in FIGS. 6 and 7 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a holder 48 is fixedly attached to the back bracket 25, and a pair of piezoelectric laminated bodies 49 and 50 are attached to the recess 481 of the holder 48 so as to face each other. The lower end of the braking plate 30 is inserted between the opposing piezoelectric laminates 49, 50. As shown in FIG. 7, the piezoelectric laminates 49 and 50 include a piezoelectric element 51 and a conductor 52.
Are alternately laminated, and each piezoelectric element 51 is sandwiched by conductors 52. One of the conductors 52 sandwiching the piezoelectric element 51 is a positive electrode and the other is a negative electrode. When a voltage is applied to the piezoelectric laminated bodies 49 and 50, the piezoelectric element 51 extends in the laminating direction, and the piezoelectric laminated bodies 49 and 50 extend as a whole. By this extension, the lower end of the braking plate 30 is pinched between the piezoelectric laminated bodies 49 and 50, and easing of the easing roller 14 is prevented. Piezoelectric laminate 49, 5
0 receives the voltage application control of the loom control computer C.
The voltage application command state of the loom control computer C is the blocking mode, and the voltage application stop command state is the release mode.

According to the third embodiment, the following effects can be obtained. (1) The same effect as the first embodiment can be obtained. (2) Since the braking plate 30 is braked at the lower end portion farthest from the roller shaft 131 which is the center of rotation thereof, the driving force for preventing the easing roller 14 from swinging can be minimized. (3) Piezoelectric laminates 49, 5 that clamp the braking plate 30
The clamping force of 0 is very strong, and the rocking prevention of the braking plate 30 is sure.

In the present invention, the braking plate 30 and the tension lever 29 may be integrated, or a bar that does not rotate may be used as an easing body. Also, JP-A-56-1442
The present invention can also be applied to the case where the tension is specifically applied to the warp when the weaving is restarted to correct the position of the cloth fell, as disclosed in Japanese Patent Publication No. 58-58. In this case,
It is sufficient to prevent the easing roller from swinging before applying a particular tension to the warp. The easing prevention may be performed only when there is an abnormal signal from the warp break detector. or,
Easing prevention may be performed in response to an abnormal signal without distinguishing between weft cutting and warp cutting.

The release signal may be input a predetermined time after the weaving is restarted. Further, the easing prevention signal and the release signal may be input to the switching control means by a manual input switch.

[0046]

As described above in detail, in the present invention, since the easing preventing means for releasably fixing the easing body is incorporated in the loom equipped with the degaussing easing device, the loom generation in the loom equipped with the degaussing easing device. Can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a side view of the entire loom showing a first embodiment.

FIG. 2 is a cross-sectional view of the main part.

FIG. 3 is a flowchart showing a cloth fell position displacement control program and an easing control program.

FIG. 4 is a flowchart showing a cloth fell position displacement control program and an easing control program.

FIG. 5 is a back cross-sectional view of an essential part showing the second embodiment.

FIG. 6 is a back cross-sectional view of an essential part showing a third embodiment.

FIG. 7 is an enlarged sectional view showing the structure of the piezoelectric laminate.

[Explanation of symbols]

14 ... Easing roller serving as an easing body, 30 ... Braking plate forming easing preventing means, 43 ... Electromagnet forming easing preventing means, 46 ... Air cylinder forming easing preventing means, 461 ... Braking forming easing preventing means Body, 49, 50 ... Piezoelectric laminate constituting easing preventing means, C ... Loom control computer serving as switching control means.

Claims (7)

[Claims] 1. A weaving machine provided with a depolarizing easing device for absorbing tension fluctuation of a warp by a spring force through an easing body in contact with the warp, and a weaving loom provided with an easing prevention means for releasably fixing the easing body. Step prevention device. 2. A weaving bar preventer for a loom according to claim 1, further comprising switching control means for switching the easing prevention means between a blocking mode for fixing the easing body and a releasing mode for releasing the easing body. 3. The switching control means sets the easing prevention means in an easing prevention mode on the basis of grasping the easing prevention timing, and sets the easing prevention means in a release mode on the basis of grasping the easing prevention release timing. Weaving bar prevention device in the loom of the company. 4. The weft bar preventing device for a loom according to claim 3, wherein the grasping of the easing prevention timing is performed based on an input of an easing prevention signal. 5. A weft bar preventing device for a loom according to claim 3, wherein the grasping of the easing prevention release timing is performed based on the input of a release signal. 6. The switching control means sets the easing prevention means to the release mode after the cloth fell movement amount grasped by the cloth fell movement amount detecting means reaches a predetermined amount after the release signal is input. The weft bar preventing device in the loom according to. 7. The release signal is a weft insertion error processing completion signal output from the weft processing device.
A weft bar preventing device in the loom according to any one of 1.