CN111455528B

CN111455528B - Method and device for limiting start of pile loom

Info

Publication number: CN111455528B
Application number: CN201911374422.4A
Authority: CN
Inventors: 伊藤直幸; 志武丰; 樱田健司
Original assignee: Tsudakoma Industrial Co Ltd
Current assignee: Tsudakoma Corp
Priority date: 2019-01-22
Filing date: 2019-12-27
Publication date: 2022-12-13
Anticipated expiration: 2039-12-27
Also published as: CN111455528A; EP3686332A1; JP2020117823A; JP7159063B2; EP3686332B1

Abstract

The present invention provides a method for limiting the start of a pile loom, wherein an operator removes defective yarns when a weft insertion failure occurs in the pile loom, the method comprising: storing in advance the number of start-up reversals set to the same value as the pile step for the first tightened weft, which is the loose weft and the first tightened weft, among the pile wefts, and assigning 1 to the second and subsequent tightened wefts when the pile pattern includes a plurality of tightened wefts; reading out a numerical value corresponding to the circulating pile weft of the loom with the poor weft insertion from the starting reversal frequency when the poor weft insertion occurs in the weaving process and storing the numerical value as a current value; the stored current values are updated as follows: with the positive rotation of the main shaft of the loom, the rotation angle of the main shaft passes through 0 degrees every time, then the current value is added with 1, with the negative rotation of the main shaft, the rotation angle of the main shaft passes through 0 degrees every time, then the current value is subtracted with 1; the start of the loom by operating the operation button is prohibited until the updated current value becomes 0.

Description

Method and device for limiting start of pile loom

Technical Field

The present invention relates to a method and a device for limiting the start-up of a pile loom, in which one pile forming cycle is constituted by a pile pattern including loose weft and tight weft, the pile forming cycle is constituted by a plurality of loom cycles, and in each pile step in the pile forming cycle, the relative positions of a beat-up position and a fell position are changed in accordance with the pile pattern to form a pile, and when the weft insertion failure occurs, the operator removes the defective yarn.

Further, the above-mentioned "pile weft" is a generic name of so-called loose weft and tight weft which are performed for forming pile in a pile loom.

In the above-mentioned "pile pattern", one pile is formed by passing two or more weft loosening yarns and one or more weft tightening yarns thereafter, and the "pile pattern" is configured as a combination of the number of weft loosening yarns and the number of weft tightening yarns. For example, in the case where one pile is formed by two times of the weft loosening (L) and one time of the weft tightening (F), the pile pattern is a combination of 2L and 1F, and is denoted as "2L-1F".

Also, the above-mentioned "one pile forming cycle" refers to a loom cycle in which one repetition of a pile pattern composed of a plurality of pile wefts is performed (completed) as described above. Further, since each pile weft is carried out in one loom cycle, the number of pile forming cycles (number of cycles) corresponds to the number of loom cycles of the total number of pile wefts in the pile pattern. Thus, for example, where the tuft pattern is 2L-1F as described above, one tuft forming cycle is three loom cycles.

Further, the "pile step" mentioned above is a stage in the pile forming cycle in units of loom cycles, and this stage (the number) is denoted by a step number.

Background

In a loom, if a defective weft insertion occurs during weaving, the following recovery operation is performed with the defective weft removed: after the loom is stopped, a weft yarn that has been defective in weft insertion (hereinafter referred to as "defective weft") is removed from the cloth fell while the woven cloth is being woven, and the loom is restarted. In the pile loom, if only defective weft yarns are removed and the loom is restarted, a defect (hereinafter, referred to as "pile drop") may occur in the woven pile fabric. Specifically, when a weft insertion failure occurs in the weft insertion of the loom cycle of the second or subsequent loose weft and the first tight weft, if the loom is restarted by removing only the defective weft, the pile warp is pulled to the delivery side and the pile is dropped in association with the subsequent weaving because the retaining force of the weft on the pile formed or formed next is reduced. Therefore, in the case described above, in this recovery operation, not only the defective weft yarn but also all the weft yarns inserted in the loom cycle of the preceding loose weft in this one pile forming cycle need to be removed.

In addition, although there is no problem in the case of a loom configured to automatically remove a weft yarn as described above, in the case of a loom in which an operator performs the recovery operation such as removal of a defective weft yarn, there is a possibility that the operator forgets to remove only the defective weft yarn and restarts the loom. Also, in this case, the woven fabric may have pile shedding as described above. Therefore, as a technique for preventing the restart of the loom in a state where the weft yarn to be removed is not removed in this way, there is a technique disclosed in the following patent document 1 (hereinafter, referred to as "conventional technique").

In the above-described conventional technique, in order to prevent pile shedding as described above, when restarting the loom after stopping due to a weft insertion failure, the start of the loom from the loom cycle of the second loose weft or the loom cycle of the first tight weft immediately after the loose weft is prohibited.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 7-126961

Disclosure of Invention

Problems to be solved by the invention

However, in the above-mentioned prior art, the loose weft is only suitable for the case where the pile pattern disclosed in the prior art document is "2L-1F" or "2L-2F", that is, the case where the loose weft is two loom cycles, and is not suitable for the pile pattern other than this.

Specifically, in a specific pile loom, the types of pile fabrics to be woven are not limited to the two types described above, and are generally three or more types. In addition, there is a possibility that the three or more pile fabrics include a fabric woven in a pile pattern set so that the weft loosening is three or more loom cycles. For example, when the loose weft is a pile pattern of three loom cycles, a weft insertion failure is assumed to occur in the weft insertion of the first tight weft. In this case, if the operator wants to remove only the bad weft yarn and restart the loom, the state of the loom at the time of this restart is the third loose-weft loom cycle.

However, in the above-described prior art, it is only assumed that the restart in the loom cycle of the second loose weft is prohibited with respect to the loose weft, so that the loom will be restarted in the case described above. Therefore, in this case, pile shedding as described above will occur.

In the pile loom which is supposed to weave three or more pile fabrics as described above, the pile patterns set in the pile loom are counted in accordance with the supposed pile weave. In this case, if it is attempted to prohibit the restart as described above based on the above-described prior art, there is a problem that the preparation thereof requires a lot of labor and time.

Specifically, in the above-described conventional technique, the restart in the loom cycle of the pile pattern is prohibited by setting each pile step (the loose weft of step No. 2 and the tight weft of step No. 3) in which the restart of the loom is prohibited, in advance, in the program of the loom control computer. That is, the above-described conventional technique requires setting all the pile patterns for which restart is prohibited for each pile pattern. Therefore, when three or more kinds of pile fabrics are supposed to be woven as described above, since the pile loom naturally sets the number of pile patterns corresponding to the kind of the pile fabric supposed to be woven, it is necessary to set each pile step for prohibiting restart in advance for all the pile patterns set. In the above-described conventional technique, the setting is performed for the program of the loom control computer, that is, with modification of the program. Therefore, in the case as described above, if it is attempted to prohibit the restart of the pile loom based on the above-described prior art, the setting (preparation) requires a lot of labor and time.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a start-up limiting method and device for preventing pile drop due to an operation error of an operator and facilitating setting for prohibiting restart in a loom cycle of a specific pile weft even when a pile fabric using a pile pattern having a three or more loom cycles of loose weft is woven in a pile loom described in the above technical field.

Means for solving the problems

The invention is premised on that when a pile loom has poor weft insertion, an operator removes the poor yarn. In this pile loom, one pile forming cycle is constituted by a pile pattern including loose weft and tight weft, that is, pile weft, the one pile forming cycle is constituted by a plurality of loom cycles, and in each pile step in the one pile forming cycle, pile formation is performed by changing the relative positions of the beat-up position and the cloth fell position in accordance with the pile pattern.

Further, the start-up limiting method of a pile loom of the present invention is characterized by: storing in advance a number of start-up reversals set to be the same as the pile step in the number assigned to a first tight weft, which is the loose weft and the first tight weft, among the pile weft, and assigning 1 to the second and subsequent tight wefts when the pile pattern includes a plurality of tight wefts; reading out a numerical value corresponding to the pile weft of the loom circulation with the poor weft insertion from the starting reversal frequency and storing the numerical value as a current value when the poor weft insertion occurs in the weaving process; the stored current values are updated as follows: the current value is added with 1 every time the rotation angle of the main shaft passes through 0 degrees along with the forward rotation of the main shaft of the loom along with the subsequent action of the loom, and is subtracted with 1 every time the rotation angle of the main shaft passes through 0 degrees along with the reverse rotation of the main shaft; and prohibiting the start of the loom by operating the operation button until the updated current value becomes 0.

In addition, the start-up limiting method of the pile loom of the present invention may be: presetting a starting interval which is determined as the range of the rotation angle of the main shaft in the loom circulation of the weft tightening; and prohibiting the loom from being started by operating the operation button at the rotation angle of the main shaft outside the startable section.

The start-up limiting device for a pile loom according to the present invention includes the following first memory, second memory, arithmetic unit, and start-up controller. The first memory stores in advance a number of times of start-up reversal, which is set to the same value as the pile step for assigning the first closed weft, which is the loose weft and the first closed weft, among the pile weft, and assigns 1 to the second and subsequent closed wefts when the pile pattern includes a plurality of the closed wefts. The second memory stores, as a current value, a value read out from the number of start-up reversals stored in the first memory, which corresponds to the weft pile of a loom cycle in which the weft insertion failure has occurred, in association with generation of a detection signal associated with the weft insertion failure. The operator updates the current value stored in the second memory as follows: the current value is added by 1 every time the rotation angle of the main shaft passes 0 DEG in accordance with the normal rotation of the main shaft accompanying the operation of the loom, and the current value is subtracted by 1 every time the rotation angle of the main shaft passes 0 DEG in accordance with the reverse rotation of the main shaft. The start controller monitors the updated current value until the current value becomes 0, and prohibits the start of the loom by operating the operation button.

In addition, the start-up limiting device of the pile loom of the present invention may be: the first memory stores a start-up enabled section which is determined as a range of a rotation angle of the main shaft in the loom cycle of the weft tightening, and the start-up controller prohibits start-up of the loom by operating the operation button at a rotation angle of the main shaft outside the start-up enabled section.

Effects of the invention

The invention realizes that even in a pile loom for weaving piles by using a pile pattern with three or more loom cycles of loose weft, when the loom is restarted after being stopped when weft insertion failure occurs, the start of the loom is prohibited in all loom cycles of loose weft. Specifically, in a pile pattern in which the number of loose wefts and tight wefts is not limited, a numerical value (the number of starting reversals) is assigned to each pile step, and the start of the loom is prohibited in accordance with the number of starting reversals and the number of forward and reverse rotations of the main shaft for a predetermined period (specifically, the number of forward and reverse rotations of the main shaft from the time when a weft insertion failure is detected to the time when the defective weft is removed and the loom is reversed in a loom cycle in which the loom can be started).

In the present invention, the setting for prohibiting the start of the loom (setting of the number of start-up reversals) is performed as follows: the same value as in the pile step is assigned to the loose weft and the first tight weft, and if the pile pattern includes a plurality of tight wefts, 1 is assigned to the second and subsequent tight wefts. Thus, according to the present invention, since it is not necessary to set the pile step for prohibiting the restart for each pile pattern one by one as in the conventional technique, it is possible to reduce the labor and time required for the setting (preparation) operation. Therefore, according to the present invention, even in a pile loom that performs pile weaving using a pile pattern having three or more loom cycles with loose weft, the inhibition of the start-up described above can be realized without requiring a large amount of labor or the like in the setting (preparation).

In the present invention, the startable section is determined in advance as the range of the rotation angle of the main shaft (hereinafter, referred to as "crank angle"), and the restart at the crank angle other than the startable section is prohibited, thereby preventing the weft insertion from being performed normally immediately after the restart.

Specifically, in a normal loom, depending on the crank angle at which the loom is started, there is a possibility that the weft insertion immediately after the start cannot be performed normally. In other words, the loom must be started in a state where the crank angle is at a rotation angle within an angular range in which weft insertion can be normally performed (hereinafter, referred to as "weft insertion possible angle"). Therefore, in the present invention described above, the loom enters a state of a loom cycle that can be restarted (a loom cycle in which the current value becomes 0) by normal and reverse rotation operations of the loom (main shaft) toward restart after detection of a defective weft (hereinafter, referred to as "restart preparation operation").

However, in the reverse rotation operation of the main shaft toward the crank angle that is finally restarted in the restart preparation operation, there is a possibility that the reverse rotation operation may be stopped in a state where the crank angle is other than the wefting-enabling angle in the loom cycle in which the current value is 0 due to an operation error of the operator. In addition, if the loom is restarted in this state, the weft insertion may not be performed normally as described above.

In contrast, by making the first memory store the rotation range in which the normal weft insertion is performed as the startable section in advance, and configuring the start controller so as to prohibit the start from the rotation angle of the main shaft other than the startable section, it is possible to prevent the occurrence of the above-described case where the normal weft insertion cannot be performed immediately after the restart due to the operation error.

Drawings

Fig. 1 is an explanatory diagram showing an example of a pile loom to which the present invention is applied.

Fig. 2 is an explanatory diagram showing an example of a pattern setting screen for inputting and setting the weaving pattern set by the present invention.

Fig. 3 is a block diagram showing an example of the start-up limiting device of the pile loom of the present invention.

Fig. 4 is a list showing an example of setting of the number of startup inversions corresponding to a plurality of pile patterns.

Fig. 5 is an explanatory diagram showing the operation of the pile loom when weft removal and loom operation are performed in the correct order.

Fig. 6 is an explanatory diagram showing an operation of the pile loom when the operation buttons are operated in a wrong order.

Fig. 7 is a block diagram showing a modified embodiment of the activation limiting device.

Description of the symbols

1-pile loom, 2-pile warp (warp), 3-warp beam (pile warp beam), 4-ground warp (warp), 5-warp beam (ground warp beam), 6-guide roller, 7-pile tension roller, 8-heald frame, 9-heald, 11-reed, 12-fell, 13-tension roller, 14-shed, 15-woven cloth, 16-cross guide, 17-take-up roller (face roller), 18-guide roller, 19-take-up shaft, 21-drive motor, 22-weft detector, 23-spindle motor, 24-spindle, 25-reverse button, 26-run button, 27-forward button, 28-encoder, 30-main control device, 40-input setting device, 41-pattern setting screen, 42-setting display column for pile pattern, 43-column for left end, 43 a-number, 44-a setting display field of the shedding pattern, 44 a-a portion on the upper side of the setting display field of the shedding pattern, 45-a setting display field of color and weft density, 50-a drive control device, 60, 60A-a start limiting device, 61-a first memory, 62-a current value calculator, 63-a start controller, 64-a storage section, 65-an arithmetic section, 66-a current value transmitter, 67-a second memory, 68-an arithmetic section, S1-a stop signal, S2-a weft arrival signal, S4-an operation command signal, S6-a detection signal, S8-a pile information signal, S10-a rotation signal, S12-an operation signal, S14-a request signal, S16-a prohibition signal, C-a cell, N-a distribution value, P-a current value.

Detailed Description

Fig. 1 shows an example of a pile loom to which the present invention is applied. The pile loom of the present embodiment is a cloth-moving type pile loom in which pile is formed by moving the position of the cloth fell in the front-rear direction by a terry motion in accordance with the pile pattern and changing the relative position between the cloth fell position and the beat-up position.

As shown in fig. 1, the pile loom 1 includes two

warp beams

3 and 5, a pile warp supplying warp beam (pile warp beam) 3 in which a plurality of pile warps 2 are wound in a sheet shape, and a warp supplying warp beam (ground warp beam) 5 in which a plurality of warps 4 are wound in a sheet shape.

The pile warp 2 is fed from the pile warp beam 3 and guided to the fell 12 via the guide roller 6, the pile tension roller 7, the heald frame 8 (heald 9), and the reed 11. On the other hand, the warp yarns 4 are fed out from the warp yarn shaft 5, wound around a tension roller 13 for warp yarns, and then guided to the fell 12 via the healds 9 and the reed 11.

Then, the

warp yarns

2 and 4 fed from the warp beams 3 and 5 form an shed 14 by the vertical movement of the heald frame 8, and the weft yarn (not shown) inserted into the shed 14 is reed-beaten to the fell 12 by the reed 11, thereby forming a woven fabric 15. The woven fabric 15 is wound around the cross guide 16, guided, and then wound around a winding shaft 19 via a winding roller (surface roller) 17 and a guide roller 18.

In such a pile loom, pile weaving for forming piles and ground weave weaving for forming stripes and the like are repeated. The pile loom 1 of the present embodiment is a so-called cloth-shift pile loom that performs pile weaving by moving the cloth fell position with respect to the most advanced position of the reed 11 as described above.

In such a pile loom, the movement of the cloth fell as described above is also called terry motion. The terry motion is performed by displacing the ground warp 4 wound around the tension roller 13 for ground warp and the cross guide 16 wound with the woven cloth 15 forward and backward as described above. Incidentally, the structure for displacing the tension roller 13 and the cross guide 16 is known per se, and therefore, the description thereof is omitted, but in the illustrated example, the drive motor 21 is used as a drive source for this operation. The drive motor 21 is driven in accordance with a pile pattern stored in advance in the main control device 30 of the pile loom 1.

The pile pattern is set in the input setting device 40 and stored in the main control device 30. Fig. 2 shows a pattern setting screen 41 for setting a weaving pattern including a pile pattern in the input setting device 40. The right column 42 of the pattern setting screen 41 is a pile pattern setting display column 42. The weaving pattern includes the tension of the pile warp or the ground warp, the loom rotation speed, the type (color) of the weft, the weft density, the shedding pattern, and the pile pattern. In the pattern setting screen 41, the shedding pattern, color, weft density, and pile pattern are set for each loom cycle.

In the pattern setting screen 41, the numeral 43a in the left end column 43 indicates the step number of the weaving pattern (1 step = one loom cycle). On the right side thereof, a column 44 in which the cells C are arranged in a lattice shape is a setting display column 44 of an opening pattern. In addition, a number indicating the number of the heald frame is displayed in a portion 44a on the upper side of the setting display column 44 with respect to the shedding pattern. The center column 45 of the pattern setting screen 41 is a setting display column 45 for color and weft density.

In the illustrated pattern setting screen 41, the pile pattern is set in the form of "53l-2F" or "4 3l-1F" in the "P" column in the pile pattern setting display column 42. However, in this display (e.g., "5 3L-2F"), as described above, "L" indicates loose weft and "F" indicates tight weft. Thus, "3L-2F" indicates a pile pattern composed of three times of loose picks and two times of tight picks. The number on the left side ("5" in "53 l-2F") indicates the total number of pile wefts constituting the pile pattern, i.e., the number of loom cycles of one pile forming cycle.

In addition, to complete the pile pattern at the time of weaving, the number of loom cycles corresponding to the one pile forming cycle is required. Therefore, in the column "P" in the pile pattern setting display column 42, the same pile pattern is set for the cell corresponding to the number of loom cycles. Specifically, since five loom cycles are required to complete the pile pattern of 3L-2F, "53L-2F" is set for a cell corresponding to five loom cycles.

In addition, the number displayed in the "S" column on the right side in the "P" column of the pile pattern setting display column 42 indicates the step number of the pile step set in the pile pattern in the "P" column. Incidentally, in the pile pattern of 3L-2F, the pile steps of step numbers 1 to 3 correspond to the loose weft, and the pile steps of step numbers 4 to 5 correspond to the tight weft.

In this way, the pile is raised in accordance with the pile pattern set on the pattern setting screen 41. Specifically, in the pile pattern of 3L-2F, the fell position is moved in a direction (forward) away from the most advanced position of the reed in the first weft loosening (pile step whose step number is "1") in the pile pattern. In addition, in the first pick-up (pile step whose step number is "4") in the pile pattern, the fell position is moved (returned) to the forefront position of the reed.

However, the present invention is premised on a pile loom (hereinafter, simply referred to as "loom") in which an operator removes a defective weft when a weft insertion defect occurs. In such a loom, when a weft insertion failure occurs, the following operation is performed in the loom.

First, as a premise, the main control device 30 is connected to the weft detector 22, which is a sensor for detecting the arrival of the weft. The main control device 30 has a function of determining whether or not weft insertion is performed normally (whether or not a weft insertion failure has occurred) based on the weft arrival signal S2 input from the weft detector 22. Then, if it is determined that a weft insertion failure has occurred, the main control device 30 outputs a stop signal S1 to the drive control device 50. In response to the input of the stop signal S1, the drive control device 50 stops the rotation of the spindle motor 23 and operates a brake (not shown), thereby performing stop control of the loom.

Accordingly, the loom is temporarily stopped in the vicinity of a crank angle of 280 ° in the next loom cycle in which a weft insertion failure occurs, for example, through the idle rotation of the main shaft 24 by about one rotation from the time when the stop control is started. Incidentally, the crank angle in the state of temporary stop is referred to as "the crank angle at the primary stop position". Then, the reverse operation is automatically started, and the loom is stopped after the reverse operation is completed, and a standby state is set for waiting for the operator. The crank angle in the standby state is referred to as a "crank angle at the secondary stop position". The reverse rotation of the loom is performed such that the main shaft 24 rotates in the left and right direction. Therefore, the loom is in the standby state near the crank angle of 300 ° in the loom cycle in which the weft insertion failure occurs, and the crank angle passes through 0 ° in the process of the reverse rotation.

Further, if the operator reaches the loom, the operator operates the reverse button 25 to reverse the loom to around 180 ° in crank angle. This opens the warp and allows the defective weft to be taken out. In this state, the operator performs a removing operation for removing a defective weft yarn from the inside of the opening 14 of the warp yarn.

In addition, when the weft yarn located closest to the fell side after the removal operation is a weft yarn inserted in a loom cycle in which the weft is loosened (hereinafter, referred to as a "loose weft cycle"), the weft yarn needs to be removed when the loom is restarted. Therefore, in this case, as described above, the operator reverses the loom to make the weft yarn in a state in which the weft yarn can be taken out, and then performs the weft yarn removing operation.

After the removal operation of all the weft yarns to be removed including the defective weft yarn is performed, the operator operates the reverse button 25 to reverse the loom to a crank angle (start angle) for restarting the loom. Furthermore, the starting angle is set in the vicinity of, for example, 300 ° in crank angle in the loom cycle immediately preceding the loom cycle from which the last weft yarn that should be removed is removed. Thus, also during the reversal towards the restart of the weaving machine, the crank angle passes through 0 °.

When the loom is reversed to the start angle, the operator stops the loom by terminating the operation of the reverse button 25 and operates the operation button 26 (hereinafter referred to as "operation button operation"). Thereby, the loom is restarted. Incidentally, a normal rotation button 27 is also provided on the loom. The operator operates the forward rotation button 27 as necessary to rotate the loom forward in the weft removing operation and the operation of matching the crank angle of the loom with the start angle.

In the pile loom described above, in the present invention, the loom is provided with the start-up restriction device for restricting the restart by the operation of the operation button after the operation of removing the defective weft yarn. The start-up limiting device will be described in detail below.

As shown in fig. 3, the start-up limiting device 60 is connected at its input end to the main control device 30 and at its output end to the drive control device 50 that drives and controls the spindle motor 23 of the loom. Further, the activation restriction device 60 is configured to: the components include a first memory 61 for storing the number of times of startup inversion to be described later, a current value calculator 62 connected to the first memory 61 and the main control device 30 at the input end, and a startup controller 63 connected to the first memory 61, the current value calculator 62, and the main control device 30 at the input end.

The loom further includes an encoder 28 as a device for detecting the crank angle. Furthermore, the start controller 63 in the start limiting device 60 is also connected at its input to the encoder 28. Then, a signal (angle signal θ) indicating the crank angle detected by the encoder 28 is input to the start controller 63. In addition, the start controller 63 is connected at its output to the drive control device 50. The start controller 63 is configured to output an operation command signal S4, which is a signal for restarting the loom, to the drive control device 50.

The first memory 61 stores in advance setting values relating to inhibition of restart of the loom, such as the number of start-up reversals and a startable interval. Of these set values, the number of start-up reversals is a set value used for determining whether or not to prohibit restart of the loom. The number of start-up reversals is set for all pile patterns stored in the main control device 30.

Specifically, when the pile weft in the pile step is the loose weft and the first tight weft, the number of the start-up reversal is set to the same value as the step number assigned to the pile step. In addition, the number of times of reversal activation is set for a pile pattern set to include a plurality of weft fastenings, and in addition to the above setting, 1 is assigned to the second and subsequent weft fastenings. In this start reversal count, a numerical value assigned to each pile weft of the pile pattern (hereinafter, referred to as "assigned value") corresponds to the number of loom cycles from a loom cycle in which a weft insertion failure is detected (hereinafter, referred to as "detection cycle") to a loom cycle in which the loom can be restarted.

More specifically, as described above, in the case where the weft yarn located closest to the fell side after the removal operation of the weft yarn is the weft yarn inserted in the weft loosening cycle, the weft yarn needs to be removed in order to restart the loom. Further, by setting the loom in a state in which the weft closest to the fell side is the weft inserted in the loom cycle of the weft tightening (hereinafter, referred to as "weft tightening cycle"), it is possible to prevent a problem in weaving from occurring after the restart of the loom. Therefore, normally, the loom (main shaft 24) is reversed to the above-described start angle in the weft-tighting cycle closest to the detection cycle in the reverse direction, and the loom is restarted in this state. Incidentally, in the case where the detection cycle is the loose weft cycle or the first tighten weft cycle, the last tighten weft cycle in the pile forming cycle immediately preceding the pile forming cycle including the detection cycle is the tighten weft cycle closest to the detection cycle.

In this way, in the normal restart method, the loom is restarted in the weft-tighting cycle closest to the detection cycle, but the loom cycle in which the restart is performed is the loom cycle that is the number of pile steps corresponding to the detection cycle before the detection cycle. In other words, by reversing the main shaft 24 from the detection cycle by 1 to the unit corresponding to the number of pile steps of the detection cycle, the loom comes into a state of reaching the loom cycle in which the restart is performed.

As described above, the number of start-up reversals is used to determine whether or not restart of the loom is prohibited, and this determination is made based on whether or not a reversal corresponding to the assigned value has been performed from the detection cycle. Therefore, when the detection cycle is the weft loosening cycle or the first weft tightening cycle, the assigned value of the number of starting inversions is set to the same value as the step number of the pile step of the detection cycle. In addition, when the detection cycle is the second or later weft tightening cycle, it is a matter of course that the weft tightening cycle closest to the detection cycle is the previous loom cycle of the detection cycle because the previous loom cycle is also the weft tightening cycle. Therefore, in this case, the assigned value of the number of start-up inversions is set to 1. The number of activation inversion times is set for each pile pattern so that the above-described assigned value is assigned to each pile step in the pile pattern.

Fig. 4 shows an example of the number of times of the startup reverse rotation described above. Fig. 4 shows, in the form of a table, how the number of activation inversions is set for a plurality of pile patterns. In the table shown in fig. 4, pile patterns are shown in the leftmost column of the table, and the weft yarns in each pile step and the assigned values of the number of activation reversals corresponding to the pile step are shown in the columns arranged on the right side of the pile patterns. Specifically, "F/4" in the column of step number 4 (4 th) of the 3L-2F pile pattern indicates that the weft of the loom cycle is the tight weft and the assigned value of the number of start-up reversals is 4.

Incidentally, a general pile loom can weave in correspondence with a plurality of pile patterns. Therefore, in the present embodiment, the number of activation inversions stored in the first memory is stored in the first memory as system data in a form in which the number of activation inversions corresponding to each of the plurality of pile patterns (for example, all the data shown in fig. 4) is associated with each pile pattern.

The startable section of the set values is a section that can be restarted within the loom cycle (while the main shaft 1 is rotating), and is set within the angle range of the crank angle. In other words, the startable section is a section determined to prohibit restart at a crank angle outside the set angle range. More specifically, as the activatable section, an angle range of a crank angle in which weft insertion is normally performed immediately after restart is set. The angular range is determined based on weaving conditions (e.g., the rotational speed of the loom, the injection start timing and injection pressure of the weft insertion nozzle, the width of the pile fabric to be woven, and the like). Also, in the present embodiment, the angle range 241 to 340 ° is set as the startable section.

As shown in fig. 3, the current value calculator 62 includes a storage unit 64 and an arithmetic unit 65. The storage unit 64 corresponds to a second memory in the present invention. The storage unit 64 is configured to store, as the current value P, a numerical value (assigned value) corresponding to the pile weft in the loom cycle in which the weft insertion failure has occurred, that is, an assigned value N read from the number of start-up reversals stored in the first memory 61, in association with the generation of the detection signal (hereinafter, simply referred to as "detection signal") S6 of the weft insertion failure. The arithmetic unit 65 corresponds to an arithmetic unit of the present invention, and is configured to update the current value P stored in the storage unit 64 every time the crank angle passes 0 ° in accordance with the normal rotation and reverse rotation of the main shaft 24 in accordance with the operation of the loom. Further details regarding the current value operator 62 thus constructed are as follows.

First, as a premise, as shown in fig. 3, the main control device 30 is connected to the arithmetic section 65 in the current value arithmetic unit 62. The main control device 30 is configured to perform the stop control of the loom and output a detection signal S6 to the arithmetic unit 65 when it is determined that a weft insertion failure has occurred based on the weft arrival signal S2 input from the weft detector 22.

As described above, the main control device 30 stores the pile pattern input and set by the input setting device 40. In weaving, the main controller 30 updates the current step number in the weaving pattern and updates the pile pattern and pile step to the pile pattern and pile step corresponding to the updated step number every rotation of the main shaft 24, thereby controlling the drive motor. Therefore, in each loom cycle, the main control device 30 grasps the pile pattern and the pile step at that time. As described above, the main controller 30 is configured to output the detection signal S6 to the calculation unit 65, and also to output the pile information signal S8 indicating the current pile pattern and pile step to the calculation unit 65.

On the premise as described above, the calculation unit 65 is configured to read the assigned value N of the number of times of activation inversion from the first memory 61 based on the pile pattern and the pile step indicated by the pile information signal S8 in response to the input of the probe signal S6 and the pile information signal S8 from the main control device 30. Specifically, when the pile pattern indicated by the pile information signal S8 input from the main control device 30 is 3L to 2F and the pile step (step No. 4), the arithmetic unit 65 reads out 4 from the first memory 61 as the assigned value N of the number of activation inversions. The calculation unit 65 is configured to store the read distribution value N as a current value P in the storage unit 64 of the current value calculator 62.

As described above, the calculation unit 65 is configured to update the current value P stored in the storage unit 64 every time the crank angle passes through 0 ° in accordance with the normal rotation and reverse rotation of the main shaft 24 in accordance with the operation of the loom. More specifically, the main control device 30 is configured to output a rotation signal S10 (normal rotation signal/reverse rotation signal) indicating the rotation direction of the main shaft 24 to the arithmetic unit 65 as the main shaft is driven. The rotation signal S10 is a signal output during a period not including weaving. Therefore, the normal rotation signal is output to the arithmetic unit 65 also during the idle rotation in accordance with the stop control described above. Incidentally, "weaving" in this embodiment means a period from the operation start time of the loom to the occurrence time of the cause of stoppage such as a weft insertion failure. The rotation signal S10 is also output to the drive control device 50, and the drive control device 50 is configured to drive and control the spindle motor 23 based on the rotation direction indicated by the rotation signal S10.

The main control device 30 is also configured to detect a crank angle based on the angle signal θ input from the encoder 28. Further, the main control device 30 is configured to output a signal (0 ° signal) θ a indicating the crank angle 0 ° to the arithmetic unit 65 every time the crank angle 0 ° is detected.

Further, if the 0 ° signal θ a is input in a state where the normal rotation signal is input from the main control device 30, the arithmetic unit 65 is configured to read out the current value P from the storage unit 64, add 1 to the current value P, and store the added value in the storage unit 64 as a new current value P (overwrite the current value P stored in the storage unit 64). Further, if the 0 ° signal θ a is input in a state where the inversion signal is input from the main control device 30, the arithmetic unit 65 is configured to read the current value P from the storage unit 64, subtract 1 from the current value P, and store the subtracted value in the storage unit 64 as a new current value P.

By configuring the calculation unit 65 in this manner, every time the crank angle passes 0 ° in accordance with the normal rotation operation of the loom, the current value P stored in the storage unit 64 is updated to a value obtained by adding 1 to the value before the crank angle passes 0 °. In addition, every time the crank angle passes 0 ° in accordance with the reverse rotation of the loom, the current value P stored in the storage unit 64 is updated to a value obtained by subtracting 1 from the value before passing 0 °.

The start controller 63 is configured to prohibit the start of the loom by operating the operation button when the current value P is not 0 and when the crank angle is out of the angle range (241 to 340 °) set as the startable section even if the current value P is 0. Further details regarding the start controller 63 are as follows.

First, as a premise, as shown in fig. 3, the operation button 26 is connected to the main control device 30 connected to the start controller 63. The main control device 30 is configured to output an operation signal S12 to the start controller 63 if the operation button 26 is operated. Further, as described above, the start controller 63 is also connected to the current value arithmetic unit 62, but the arithmetic unit 65 in the current value arithmetic unit 62 is configured to transmit the current value P stored in the storage unit 64 to the start controller 63 in response to a request from the start controller 63.

When the operation signal S12 is input from the main control device 30, the start controller 63 is configured to output a request signal S14 for the request to the current value calculator 62 (calculation unit 65). When the current value P is 0, the start controller 63 is configured to read the set value of the startable section from the first memory 61 and compare the set value with the current crank angle detected based on the angle signal θ input from the encoder 28. As a result of the comparison, the start controller 63 is configured to output the operation command signal S4 to the drive control device 50 when the crank angle is within the angle range (241 to 340 °) of the startable range. In other words, the start controller 63 is configured not to perform the above comparison when the current value P is not 0, and as a result of not performing the comparison, not to output the operation command signal S4 to the drive control device 50.

According to this configuration, when the current value P stored in the current value arithmetic unit 62 (storage unit 64) is 0, the operation command signal S4 is output from the start controller 63 to the drive control device 50 in accordance with the operation of the operation button 26, and the loom is normally restarted. On the other hand, when the current value P is not 0, the operation command signal S4 is not output from the start controller 63 even if the operation button 26 is operated, and therefore, the loom is not restarted. In other words, in the latter case, although the operation signal S12 is outputted from the main control device 30 by operating the operation button 26, the subsequent restart of the loom (by the drive control device 50) is restricted by the start restricting device 60.

In the latter case, the start controller 63 is configured to output an inhibition signal S16 indicating inhibition of restart to the main control device 30. On the other hand, the main control device 30 is configured to cause the input setting device 40 to display a message such as an operation button operation invalidation in response to the input of the prohibition signal S16.

The operation of the pile loom including the start-up regulating device 60 in the present embodiment as described above will be described with reference to fig. 5 and 6. Fig. 5 and 6 show examples of the pile patterns of 3L to 2F in which a weft insertion failure has occurred in the first weft-tighting cycle, which is the pile step of step No. 4. Incidentally, "1st (lose)" or "4th (Fast)" shown on the upper side of the drawing indicates the pile step and the pile weft of the pile pattern in the loom cycle. For example, "4th (Fast)" indicates a weft-tightening cycle in which the step number of the pile step is 4. Fig. 5 is an explanatory diagram illustrating the operation of the pile loom when the weft yarn is removed from the stop to the restart of the loom and the reverse button 25 and the operation button 26 are operated in a correct procedure. In contrast, fig. 6 is an explanatory diagram illustrating an operation of the pile loom when the operation button 26 is operated at an erroneous step. First, the operation of the pile loom when the weft yarn removing operation and the operation of the reverse button 25 and the operation button 26 are performed in the correct steps will be described in the following order (1) to (7) with reference to fig. 5.

(1) When a weft insertion failure occurs, as described above, the main control device 30 controls the stop of the loom and outputs the detection signal S6 and the pile information signal S8 to the current value calculator 62 (calculation unit 65) in the start limiting device 60. Subsequently, the calculation unit 65 reads "4" which is the assigned value N of the number of activation inversions from the first memory 61 based on the pile pattern (3L-2F) and the pile step (step No. 4) indicated by the pile information signal S8, and stores the "4" in the storage unit 64 as the current value P. In fig. 5, the current value P is shown in the vicinity of the crank angle (circled number 4) at the time of occurrence of weft insertion failure.

(2) In accordance with the stop control described above, the main shaft 24 is idly rotated to the crank angle of the primary stop position and stopped, but since the rotation is in the normal rotation direction, the main control device 30 outputs a normal rotation signal to the current value calculator 62 (calculation unit 65) during the idly rotating operation. In addition, as described above, since the idle rotation is about one rotation, the crank angle passes through 0 ° in the idle rotation. Therefore, the main control device 30 outputs a 0 ° signal to the arithmetic unit 65 only once during the idle rotation. Thus, the arithmetic unit 65 reads out the current value P "4" stored in the storage unit 64, adds 1 to the current value P, and stores the numerical value "5" obtained by the addition in the storage unit 64 as a new current value P.

(3) Then, the loom automatically performs the reverse rotation operation up to the crank angle of the secondary stop position in the standby state after the crank angle of the primary stop position is temporarily stopped. In addition, since the crank angle passes through 0 ° in the reverse rotation operation as described above, the reverse rotation signal and the primary 0 ° signal are output from the main control device 30 to the current value calculator 62 (calculation unit 65) during the reverse rotation to the secondary stop position. Thus, the calculation unit 65 reads out the current value P "5" stored in the storage unit 64 and subtracts 1 from the current value P, and stores the subtracted value "4" in the storage unit 64 as a new current value P. After the automatic reverse rotation, the loom is in a standby state at a crank angle (around 300 ° crank angle) at the secondary stop position.

(4) When the operator reaches the loom in the standby state, the operator operates the reversing button 25 to reverse the loom to around 180 ° in the loom cycle, and thereafter, the defective weft yarn is removed.

(5) In the present embodiment, since the weft insertion failure occurs in the first weft tightening cycle, the operation of removing all the weft yarns inserted in the previous three weft loosening cycles is performed. Specifically, by repeating the operation of reversing the loom to around 180 ° in the previous loom cycle and removing the weft yarn, the weft yarn inserted in the previous three loom cycles is removed. In the process of removing the weft inserted in the three loose weft cycles in this way, as shown in fig. 5, the crank angle passes through 0 ° three times in accordance with the reverse rotation operation of the loom, so that the process of subtracting every time the crank angle passes through 0 ° is performed in the same manner as described above, and at the time when the removal operation is completed, the current value P stored in the storage unit 64 in the current value arithmetic unit 62 becomes "1".

(6) Then, the operator operates the reversing button 25 to reverse the loom to the starting angle (300 °) in the previous loom cycle for restart. In addition, since the crank angle also passes through 0 ° in the reverse rotation operation, the current value P stored in the storage unit 64 is "0" by performing the subtraction processing. Also, after the reverse rotation is completed, the operator operates the operation button 26, so that the operation signal S12 is output from the main control device 30 to the start controller 63 as described above.

(7) When the operation signal S12 is input, the start controller 63 determines whether or not the current value P is 0. Also, as described above, the current value P is "0", so the start controller 63 performs comparison of the angular range (241 to 340 ° in the present embodiment) of the above-described startable section and the current crank angle (start angle: 300 °). Then, since the current crank angle is within the angle range of the startable section, the operation command signal S4 is output from the start controller 63 to the drive control device 50, and the loom is restarted.

Next, the operation of the pile loom when the operation button 26 is operated in the wrong step will be described in the following procedure (8) to (11) with reference to fig. 6.

(8) In some cases, the operator forgets or mistakes the number of weft yarns to be removed, and the operator may perform an operation for restarting the machine even though the weft yarns to be removed remain. Specifically, after removing a defective weft yarn, the operator sometimes operates the operation button 26 at a stage of removing a weft yarn inserted in the third or second weft loosening cycle so as to restart the loom, sets the reverse rotation of the loom from that position to the start angle in the immediately preceding loom cycle, and reverses the loom to that start angle.

(9) However, as is clear from the above, the current value P stored in the current value arithmetic unit 62 (storage unit 64) does not become 0 at this stage. Therefore, even if the operator operates the operation button 26 at this stage, the start controller 63 does not perform the above comparison, and does not output the operation command signal S4 to the drive control device 50.

(10) Even if the operator has performed the removing operation correctly, there is a possibility that the operator erroneously operates the operation button 26 in a state in which the loom is reversed to a crank angle at which the weft insertion immediately after the restart cannot be performed normally, that is, a crank angle outside the angle range of the startable section, in the reversing operation to the crank angle at which the restart of the loom is finally performed. However, in this case, the start controller 63 does not output the operation command signal S4 to the drive control device 50 as a result of the comparison since the crank angle at that time does not fall within the angle range of the startable section, although the comparison is made as described above.

(11) In this way, even when all of the weft yarns to be removed are not removed (when the current value P is not 0) or when all of the weft yarns to be removed are removed (when the current value P is 0), the operation command signal S4 is not output from the start-up limiting device 60 to the drive control device 50 even if the operation button 26 is operated in a state where the loom is reversed to a crank angle (a crank angle outside the angle range of the startable section) at which weft insertion cannot be normally performed immediately after restart. Therefore, the drive control device 50 does not restart the drive control of the spindle motor 23 and does not restart the loom. That is, in these cases, the restart of the loom in accordance with the operation of the operation button 26 is restricted by the start restricting device 60.

The present invention is not limited to the above-described examples (the above-described examples), and may be modified embodiments as shown in 1) to 3) below.

1) In the above embodiment, the start-up restricting means 60 is constituted by: the activatable section is preset to an angular range within the weft-tightening cycle, and the operation command signal S4 is not output to the drive control device 50 even if the operation button 26 is operated at a crank angle outside the activatable section. However, the present invention may be configured such that the startable section is not set.

For example, a loom having the following structure: as the reverse button 25 is operated in the stopped state, the loom is reversed to a preset crank angle in the previous loom cycle, and the reverse rotation is temporarily stopped at the crank angle. Therefore, the loom configured as described above may set the crank angle at which the loom is temporarily stopped within the angle range of the start-up enabled section. In this case, as a correct operation, the loom is reversed after the defective weft yarn removing operation until the crank angle reversal is stopped, and when weft yarns to be removed remain, the reversing button 25 for removing weft yarns is further operated, and when all weft yarns to be removed are removed, the operation button 26 is operated to restart the loom. Accordingly, since the operator does not operate the operation button 26 at a crank angle at which weft insertion cannot be normally performed immediately after restart, the loom may be configured such that the startable section is not set.

2) In the activation limiting device 60 of the above embodiment, the arithmetic unit 65 in the current value arithmetic unit 62 corresponding to the arithmetic unit of the present invention has a function of reading the current value P and storing the read current value P in the storage unit 64 in the current value arithmetic unit 62 corresponding to the second memory, in addition to the function of updating the current value P as described above. That is, the start-up limiting device 60 has a function of reading a current value from the first memory 61 and storing the current value in the second memory 67.

However, the start-up limiting device according to the present invention is not limited to the configuration in which the arithmetic unit has the above-described function, and may be configured to include a dedicated part having the above-described function in addition to the arithmetic unit. Specifically, as shown in fig. 7, the activation limiting device 60A is configured to include a current value transmitter 66 as the dedicated part, and the current value transmitter 66 is connected to the first memory 61, the second memory 67, and the main control device 30. In this configuration, the start-up limiting device 60A is configured such that the arithmetic unit 68 is not connected to the first memory 61. The detection signal S6 and the pile information signal S8 from the main control device 30 are output to the current value transmitter 66, but not to the arithmetic unit 68. Then, in response to the input of the detection signal S6, the current value transmitter 66 reads out a numerical value (the assigned value N in the above-described embodiment) from the number of activation inversions stored in the first memory 61 based on the pile pattern and pile step indicated by the pile information signal S8, and stores the numerical value in the second memory 67 as the current value P. Thus, as in the above-described embodiment, at the time when the weft insertion failure occurs, the current value P corresponding to the time is stored in the second memory 67.

3) In the above-described embodiment, the number of times of activation reversal is stored as system data in the activation limiting device 60 in the first memory 61, and a plurality of numbers of times of activation reversal corresponding to each of a plurality of pile patterns are stored in order to correspond to weaving of the plurality of pile patterns envisaged in the pile weaving machine. However, in the present invention, the number of times of start-up reversal is not limited to the case where a plurality of numbers of start-up reversal corresponding to the plurality of pile patterns are stored in the first memory, and only the number of times of start-up reversal corresponding to the pile pattern actually used for weaving may be stored in the first memory. As a method of storing (setting) only the number of start-up reversals corresponding to the actual pile pattern used for weaving in the first memory, for example, the following two embodiments (first and second embodiments) may be considered.

In the first embodiment, the input setting device in the pile loom is configured so that the assigned value for setting the number of times of activation reversal can be input to the pile step in the pile pattern actually used for weaving. Specifically, in the first embodiment, for example, a setting screen for setting the assigned value of the number of activation/inversion times may be provided in the input setting device, and the assigned value of the number of activation/inversion times may be input and set for each pile step of the pile pattern on the setting screen. The pile pattern may be displayed on the pattern setting screen as long as the pile pattern set on the setting screen is automatically displayed on the setting screen.

The input setting device may be configured to transmit the assigned value (the number of times of inversion activation) set by the input to the first memory in a manner correlated with the pile pattern at the time when the input setting of the assigned value is completed. In this configuration, in a preparatory stage before a new weaving starts, the operator sets the number of times of the start-up reversal in accordance with the pile pattern as the pile pattern used for the weaving is set. When the input setting is completed, the number of start-up inversions corresponding to the pile pattern used for weaving at that time is stored in the first memory. Further, as for the assigned value in the number of times of activation inversion, since it is determined based on the (simple) setting manner in which the relationship with the pile pattern has been determined as described above, it can be said that the burden imposed on the operator in this input setting is small.

In the second embodiment, when a pile pattern is set on the pattern setting screen, the input setting device is configured to automatically set the number of times of activation and inversion corresponding to the pile pattern. Specifically, the second embodiment is configured such that, for example, when a program for determining the number of activation inversion times (assigned value) based on the setting method described above with reference to the pile pattern set by the input is incorporated into the input setting device and the pile pattern is input on the pattern setting screen, the number of activation inversion times corresponding to the pile pattern set by the input is automatically set based on the program.

The input setting device may be configured to transmit the obtained number of times of the activation reversal to the first memory in a manner correlated with the pile pattern. In this configuration, when the setting of the pile pattern for weaving is completed in the preparation stage, the number of times of the activation reversal corresponding to the pile pattern is stored in the first memory.

The present invention is not limited to the above-described embodiments and modifications, and can be modified as appropriate without departing from the spirit and scope thereof.

Claims

1. A start limiting method of a pile loom, in which one pile forming cycle is constituted by a pile pattern composed of loose weft and tight weft, the pile forming cycle is composed of a plurality of loom cycles, and in each pile step in the pile forming cycle, a relative position between a beat-up position and a fell position is changed in accordance with the pile pattern to form a pile, and when a weft insertion failure occurs, an operator removes a defective yarn, the start limiting method characterized by:

storing in advance a start-up reversing count set to be equal to the pile step in a value assigned to a first tight weft, which is the loose weft and the first tight weft, among the pile wefts, and assigning 1 to the second and subsequent tight wefts when the pile pattern includes a plurality of the tight wefts;

reading out a numerical value corresponding to the pile weft of the loom circulation with the poor weft insertion from the starting reversal frequency and storing the numerical value as a current value when the poor weft insertion occurs in the weaving process;

the stored current values are updated as follows: the current value is added with 1 every time the rotation angle of the main shaft passes through 0 degrees along with the forward rotation of the main shaft of the loom along with the subsequent action of the loom, and is subtracted with 1 every time the rotation angle of the main shaft passes through 0 degrees along with the reverse rotation of the main shaft; and

and prohibiting the loom from being started by operating the operation button until the updated current value becomes 0.

2. The pile loom activation limiting method of claim 1, wherein:

presetting a startable interval which is determined as a range of the rotation angle of the main shaft in the loom cycle of the weft tightening; and

the rotation angle of the main shaft outside the startable section prohibits the start of the loom by operating the operation button.

3. A start-up limiting device for a pile loom, in which one pile forming cycle is formed of a pile pattern including loose weft and tight weft, the pile forming cycle is formed of a plurality of loom cycles, and in each pile step in the pile forming cycle, a relative position between a beat-up position and a fell position is changed in accordance with the pile pattern to form a pile, and when a weft insertion failure occurs, an operator removes a defective yarn, the start-up limiting device comprising:

a first memory that stores in advance a number of start-up reversals set to the same value as the pile step for assigning a first tightened weft, which is the loose weft and the first tightened weft, among the pile wefts, and assigns 1 to the second and subsequent tightened wefts when the pile pattern includes a plurality of tightened wefts;

a second memory for storing, as a current value, a value read out from the number of times of reversal at activation stored in the first memory in association with generation of a detection signal for a weft insertion failure, the value corresponding to the weft in a loom cycle in which the weft insertion failure has occurred;

an operator that updates the current value stored in the second memory as follows: adding 1 to the current value every time the rotation angle of the main shaft passes through 0 degrees along with the forward rotation of the main shaft accompanying the action of the loom, and subtracting 1 from the current value every time the rotation angle of the main shaft passes through 0 degrees along with the reverse rotation of the main shaft; and

and a start controller that monitors the updated current value until the current value becomes 0, and prohibits start of the loom by operating the operation button.

4. The actuation limiting device for a pile loom of claim 3, wherein:

the first memory stores an activatable section determined as a range of rotation angles of the main shaft within a loom cycle of the weft tightening,

the rotation angle of the main shaft outside the startable interval of the starting controller prohibits the starting of the loom by operating the operation button.