JP2000328386A - Synchronizing control in loom and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of a weaving bar caused by beating in synchronizing. SOLUTION: After turning an electric source of a loom on, a loom controlling computer Co and an opening controller C1 operate only an opening driving motor 20 by using a loom rotation angle memorized in the loom-controlling computer Co and synchronize a loom driving motor Mo with the opening driving motor 20. After synchronizing, the loom controlling computer Co and the opening controller C1 carry out slow reverse rotation of the loom driving motor Mo while synchronizing the opening driving motor 20 with the loom driving motor Mo and output origin signals from a rotary encoder 23 for detection of loom rotation angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling synchronization in a loom.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No.
An opening device is disclosed in which one heald frame and one dedicated drive motor are connected one to one, and a plurality of heald frames are separately driven by a dedicated motor. In a loom equipped with such an opening device, it is necessary to operate the dedicated motor and the loom drive motor in synchronization. Therefore, the operation of the dedicated motor is controlled based on the loom rotation angle information obtained from the loom rotation angle detecting means for detecting the rotation position of the main shaft of the loom (ie, the loom rotation angle).

If the loom rotation angle detecting means is an incremental encoder, the loom rotation angle information is lost every time the power of the loom is turned off. O of the power of the loom
If the loom rotates in the FF state, the synchronization between the dedicated motor and the loom drive motor is lost. Therefore, when weaving is started by turning on the power of the loom, it is necessary to synchronize the dedicated motor and the loom drive motor. In order to perform this synchronization, it is necessary to obtain the lost loom rotation angle information again. For this purpose, it is necessary to extract a rotation origin signal output once from the loom rotation angle detecting means for one rotation of the loom. If the loom drive motor is operated slowly to extract the rotation origin signal from the loom rotation angle detecting means, the lost loom rotation angle information can be obtained again.

[0004]

When the loom driving motor is slowed to obtain the lost loom rotation angle information again, the reed which obtains the driving force from the loom driving motor moves.
In beating during weaving, the warp is in a state of gripping the weft to be beaten at the time of beating. In general, when the operation of the loom is stopped, the warp is closed in order to prevent the warp from elongating while the operation of the loom is stopped. In this closed state, the warp is not in a state of holding the weft. There is a possibility that beating when the loom drive motor is slowed to obtain the lost loom rotation angle information in the closed state as described above. If beating is performed in the closed state due to the movement of the reed during the slow operation of the loom drive motor, the weft on the weaving front may be loosened and a weaving step may occur.

[0005] It is an object of the present invention to prevent the weaving step from being caused by the beating during the synchronization.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a loom having an opening device for driving a heald frame by an opening drive motor independent of a loom drive motor. The loom rotation angle detected by the incremental type loom rotation angle detecting means immediately before the turning-off is stored, and when the rotation position of the opening drive motor and the loom rotation angle are synchronized after the power is turned on, The synchronization is performed by rotating only the opening drive motor using the stored loom rotation angle and the rotation position of the opening drive motor detected by the rotation position detection means.

According to a second aspect of the present invention, in the first aspect,
Before the synchronization, only the opening drive motor is rotated to measure a reference rotation position of the opening drive motor corresponding to a reference height position of the heald frame.

According to a third aspect of the present invention, in any one of the first and second aspects, after the synchronization, the opening drive motor and the loom drive motor are rotated in synchronization with each other. When the difference between the loom rotation angle at the time of output of the origin signal output from the loom rotation angle detection means and the stored loom rotation angle is equal to or smaller than a predetermined angle difference, the operation of the loom is permitted, and When the difference exceeds a predetermined angle, the operation of the loom is prohibited.

According to a fourth aspect of the present invention, in the third aspect,
When the operation of the loom is permitted, the loom rotation angle corresponding to the rotation position of the opening drive motor is adjusted to the actual loom rotation angle so as to eliminate the difference with the operation of the loom.

According to a fifth aspect of the present invention, in any one of the third and fourth aspects, when the operation of the loom is prohibited, the synchronization is performed again. Claim 6
In the invention, an incremental type loom rotation angle detecting means for detecting the rotation angle of the loom, a backup storage means for storing the loom rotation angle detected by the loom rotation angle detecting means, and a rotation position of the shedding drive motor. Using the rotational position detecting means to detect, the loom rotational angle stored in the backup storage means, and the rotational position of the opening drive motor detected by the rotational position detecting means, rotate only the opening drive motor. Thus, there is provided a synchronization control device including synchronization means for synchronizing the rotation position of the opening drive motor and the loom rotation angle.

According to a seventh aspect of the present invention, in the sixth aspect,
Prior to the synchronization, a synchronization control device including reference position measuring means for measuring only a reference rotation position of the opening drive motor corresponding to a reference height position of the heald frame by rotating only the opening drive motor. Configured.

According to an eighth aspect of the present invention, in any one of the sixth and seventh aspects, after the synchronization by the synchronization means, the opening drive motor and the loom drive motor are synchronously rotated. Rotation origin position detection control means for outputting a first origin signal from the loom rotation angle detection means, and a loom rotation angle at the time of output of the origin signal,
Loom operation prohibition control means for permitting operation of the loom when the difference from the stored loom rotation angle is equal to or less than a predetermined angle difference, and prohibiting operation of the loom when the measured difference exceeds the predetermined angle difference. The synchronization control device provided with was constructed.

According to the first and sixth aspects of the present invention, since the loom drive motor is not operated in the synchronization using the stored loom rotation angle, the warp grasps the weft on the front of the woven cloth. Avoiding beating while not performing.

According to the third and eighth aspects of the present invention, when the loom rotates while the power of the loom is turned off, the actual loom rotation angle is shifted from the stored loom rotation angle. If the deviation is too large, weaving is adversely affected. Prohibiting the operation of the loom when the difference between the actual loom rotation angle and the stored loom rotation angle exceeds the predetermined angle difference prevents the adverse effect.

In the inventions according to claims 4 and 8, when the difference between the actual loom rotation angle and the stored loom rotation angle is small, the rotation position of the shedding drive motor is adjusted so as to eliminate the difference. Adjusting the corresponding loom rotation angle to the actual loom rotation angle has no adverse effect.

In the fifth aspect of the present invention, the difference is eliminated by the re-synchronization, and the operation of the loom is permitted after the re-synchronization.

[0017]

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

A swing lever 1 is provided below the heald frame 11.
2, 13 are rotatably supported. The swing of the swing lever 12 is controlled by the swing lever 1 via the transmission rod 14.
3 and both swing levers 12 and 13 synchronously swing. Links 15 and 16 are provided on swing levers 12 and 13.
The heald frame 11 is connected to the upper ends of the links 15 and 16. The swing of the swing levers 12 and 13 is converted into the vertical movement of the heald frame 11 via the links 15 and 16.

A support shaft 17 is provided on the side of the swing lever 12, and a driven gear 18 is rotatably supported on the support shaft 17. An eccentric shaft 18 is provided on the side of the driven gear 18.
1 are integrally formed, and the eccentric shaft 181 has a connecting ring 19.
Are fitted and connected. The rotation of the driven gear 18 is the eccentric shaft 1
The reciprocating motion of the connecting wheel 19 is converted into the reciprocating motion of the connecting wheel 19 through the fitting connection between the connecting wheel 81 and the connecting wheel 19, and the reciprocating motion of the connecting wheel 19 is transmitted to the swing lever 12.

An opening drive motor 2 is provided beside the driven gear 18.
0, and the driving gear 2 of the opening drive motor 20
01 is meshed with the driven gear 18. The opening drive motor 20 is a servo motor type variable speed drive motor. The rotation of the opening drive motor 20 is controlled by the drive gear 201 and the driven gear 1.
8, eccentric shaft 181, connecting wheel 19, swing lever 12,
The transmission is converted into a vertical movement of the heald frame 11 via a driving force transmission path composed of a transmission rod 13 and links 15 and 17. The opening drive motor 20 is controlled by a control circuit 22 via a drive circuit 21. An opening pattern is input to the control circuit 22. Curve D in FIG.
7 is an example of an opening pattern represented by a change in the height position of the opening.

The control circuit 22 drives the opening drive motor 20 in accordance with the opening pattern based on the rotation angle information of the loom obtained from the incremental type rotary encoder 23 for detecting the rotation position of the main shaft (not shown) of the loom. To the drive circuit 21. The drive circuit 21 performs feedback control of the aperture drive motor 20 based on rotational position information obtained from an incremental type rotary encoder 202 incorporated in the aperture drive motor 20. During weaving, the opening drive motor 20 rotates forward. The loom control computer Co controls the operation of the loom drive motor Mo based on the loom rotation angle information obtained from the rotary encoder 23 serving as the loom rotation angle detecting means.

A rotary encoder 202 serving as a rotational position detecting means is connected to the control circuit 22 which constitutes the aperture control device C1 together with the drive circuit 21 and the storage circuit 24 as a signal. Rotational position information obtained from the rotary encoder 202 is sent to the control circuit 22. Further, a prescribed amount measurement command switch 25 is signal-connected to the control circuit 22.

A proximity switch 27 is provided near the swing locus of the output arm 121 of the swing lever 12. The proximity switch 27 turns on when the tip of the output arm 121 of the swing lever 12 approaches a predetermined distance, and turns off when the tip of the output arm 121 moves away from the predetermined distance.
I do. The proximity switch 27 is a swing position of the tip of the output arm 121 corresponding to an intermediate position between the uppermost position of the heald frame 11 indicated by the upper dashed line in FIG. 1 and the lowermost position of the heald frame 11 indicated by the lower dashed line. It is arranged so that it may face. The proximity switch 27 is signal-connected to the control circuit 22.

According to the configuration of the driving force transmission path in the present embodiment, when the connecting ring 19 shown in FIG. 3 is at the dashed line position K1, the heald frame 11 is positioned at the uppermost dashed line in FIGS. In the upper position. When the connecting ring 19 is at the dashed line position K2, the heald frame 11 is at the lowest position shown by the dashed line on the lower side of FIGS. At the dashed line positions K1 and K2, the tip of the connecting ring 19 is omitted. When the connecting ring 19 is at the solid line position J1 and the chain line position J2, the heald frame 11 is at an intermediate position Y1 between the uppermost position and the lowermost position. The solid line position of the connecting wheel 19 in FIGS. 1 and 3 indicates the intermediate position Y1.
When the connecting ring 19 is at one dead center position of the reciprocating motion indicated by the chain line position K1, the heald frame 11 is at the highest position, and when the connecting ring 19 is at the other dead center position of the reciprocating motion indicated by the chain line position K2. The heald frame 11 is at the lowest position.

The rotational positions α1, α2, α3 in FIG.
α4, α5, α6, α7 represent the rotation origin positions during one rotation of the aperture drive motor 20. This rotation origin position αn (n
Is an integer from 1 to 7), which corresponds to one rotation (360 °) of the aperture driving motor 20 from the rotary encoder 202.
It is grasped on the basis of the output of the origin signal output repeatedly. The rotation origin position αn is a mechanical origin that is not lost even when the power supply to the opening drive motor 20 is stopped. In this embodiment, when the opening drive motor 20 makes five rotations, the heald frame 11 reciprocates up and down one time. The horizontal axis t in FIG. 5 represents the rotational position of the opening drive motor 20. When the opening drive motor 20 rotates forward, the rotation position shifts to the right side of the horizontal axis t. The rotation positions γ1 and γ2 represent the rotation positions of the opening drive motor 20 when the heald frame 11 is at the uppermost position. Rotation position β
Reference numeral 4 denotes the rotational position of the opening drive motor 20 when the heald frame 11 is at the lowest position.

Next, a description will be given of a specified amount setting control necessary for grasping the positional relationship between the height position of the heald frame 11 and the rotation position of the opening drive motor 20. After the completion of the assembly of the loom, the heald frame 11 is placed near the lowest position in advance. When the power supply (not shown) of the loom is turned on and the specified amount measurement command switch 25 is turned on, the control circuit 22 causes the opening drive motor 20 to perform the specified amount setting operation. This specified amount setting operation is performed by reciprocating the opening drive motor 20 at a low speed so that the heald frame 11 reaches the intermediate position Y1 between the uppermost position and the lowermost position twice, and moving the heald frame 11 to the uppermost position. This is an operation of stopping at a lower position. By this operation, the heald frame 11 reaches the intermediate position Y1 twice so as to pass through the lowest position, and the proximity switch 27 is turned on twice. Control circuit 2
The storage circuit 24 stores the rotational position (δ1, δ2 in FIG. 5) of the opening drive motor 20 when the proximity switch 27 is turned ON twice.
To temporarily memorize.

The control circuit 22 calculates a third rotational position of the opening drive motor 20 when the heald frame 11 is at the lowest position from the first rotational position δ1 and the second rotational position δ2, and stores the calculated rotational position. 24 is temporarily stored. This third rotational position (indicated by β4 in FIG. 5) is (δ1 + δ2) / 2
Is calculated by The control circuit 22 operates the opening drive motor 20 so that the rotation position of the opening drive motor 20 is at the third rotation position β4, that is, the heald frame 11 is at the lowest position at the reference height position. Then, the control circuit 22 determines the rotation origin position (α4 in the example of FIG. 5) and the third rotation position (δ1 + δ2) which are grasped based on the origin signal output from the rotary encoder 202 during the operation of the aperture drive motor 20. / 2 = β4 is calculated.
When the origin signal is output only once during the low-speed reverse rotation of the opening drive motor 20 as in the example of FIG.
2 is stored in the storage circuit 24 as a deviation amount (α4−β4) = Xo. If the origin signal is output a plurality of times during the low-speed reverse rotation of the opening drive motor 20, the shift amount between the rotation origin position corresponding to each origin signal and the third rotation position β4 is calculated. Then, the control circuit 22 causes the storage circuit 24 to store the minimum deviation amount among these as the specified amount Xo.

The rotation position βn in FIG. 5 (where n is an integer from 1 to 7) represents a position shifted from the rotation origin position αn by a specified amount Xo. The specified amount Xo depends on the assembled state of the driving force transmission path from the opening drive motor 20 to the heald frame 11.

FIGS. 4A and 4B show the opening drive motor 2.
FIG. 4 is a diagram illustrating a relationship among a rotation position of 0, a height position of the heald frame 11, and an arrangement position of the proximity switch 27. Yen E
Represents the height position of the heald frame 11 and the rotation position of the opening drive motor 20. In the present embodiment, moving counterclockwise on the circle E means that the aperture drive motor 20 rotates forward,
Moving clockwise on the circle E reverses the opening drive motor 20. Therefore, for the forward rotation of the opening drive motor 20 during weaving, the right half of the circle E is the heald frame 11
Is the one-way side that moves from the lowest position to the highest position,
The left half of the circle E is a one-way side for moving the heald frame 11 from the uppermost position to the lowermost position. The dashed line indicates the output arm 1
Reference numeral 21 denotes a height position of the heald frame 11 when approaching and separating from the proximity switch 27, that is, an intermediate position Y1. FIG.
The reason why the proximity switch 27 is illustrated in (a) and (b) is to express that the heald frame 11 is turned on when the heald frame 11 reaches the intermediate position Y1. Intersections α2, α3, α4, α5, α6 between the dashed radial line and the circle E indicate the rotation origin position of the opening drive motor 20, and the intersections β2, β3, β4, β5 between the solid radial line and the circle E. , Β6 represent the rotational positions of the aperture drive motor 20 shifted from the rotational origin positions α2, α3, α4, α5, α6 by a predetermined amount Xo. Intersection β4 is the third
And the lowest position of the heald frame 11. Intersection β
2, β3, β4, β5, and β6 denote one reciprocating range of the heald frame 11 based on the lowest position represented by the intersection β4 as a rotation position range of one rotation of the opening drive motor 20 (hereinafter referred to as one rotation range). ) Indicates the divided position. Arrows R1, R2, and R3 in FIG.
The state of low speed operation of the aperture drive motor 20 when the aperture drive motor 20 performs the specified amount setting operation in accordance with the N operation is shown.

The specified amount setting control as described above is performed only when the specified amount measurement command switch 25 is turned ON. When the stop signal generator 28 such as a weft insertion error detector or a warp break detector outputs a stop signal during weaving, the loom control computer Co outputs a weaving stop signal to the shedding control device C1 and the loom drive motor Mo. To stop the operation of the loom. The reed 29 which obtains the driving force from the loom driving motor Mo stops at the position shown in FIG. The control circuit 22 stops the operation control of the opening drive motor 20, that is, the opening control, based on the input of the weaving stop signal. When the operation of the loom is stopped, the heald frame 11 is arranged near the intermediate position Y1 so that the warp threads T are closed as shown in FIG. The radial direction line H1 of the two-dot chain line in FIG.
L1 of the heald frame 11 and the rotational position of the shedding drive motor 20 (indicated by L1 in FIG. 5) arranged near the intermediate position Y1. 4 in FIG.
The intersection L2 between the radial line H2 of the dashed-dotted line and the circle E is the height position of the heald frame 11 and the rotation position of the opening drive motor 20 (shown by L2 in FIG. 5) arranged near the intermediate position Y1.
Represents

When the power of the loom is turned on, the loom control computer Co sequentially updates and stores the loom rotation angle based on the loom rotation angle information obtained from the rotary encoder 23. In the power OFF state of the loom, the loom control computer Co continuously stores the loom rotation angle θi (hereinafter referred to as a backup angle) immediately before the power of the loom is turned off.

When the start switch 26 is turned on, the loom control computer Co and the shedding control device C1 serving as the backup storage unit execute the synchronization control program shown in the flowcharts of FIGS. The loom control computer Co outputs a reference position measurement command signal to the shedding control device C1 based on the ON of the start switch 26, and the shedding control device C1 responds to the input of the reference position measurement command signal to measure the following reference position. Perform control.

The control circuit 22 outputs a command to the drive circuit 21 to rotate the opening drive motor 20 half a rotation at a low speed and then reverse one rotation at a low speed. Based on this command, the drive circuit 21 reverses the opening drive motor 20 by half rotation at low speed and then reverses the rotation by one rotation at low speed.

When the heald frame 11 is arranged near the intermediate position Y1, the rotation position of the opening drive motor 20 and the height position of the heald frame 11 are the positions indicated by L1 in FIG. Assuming that the frame 11 is located at the lowering position toward the lowermost position, the arrow Q1 in FIG.
0 indicates a state in which the rotation is half-reversely rotated at a low speed, and an arrow Q2 indicates a state in which the aperture driving motor 20 is rotated forward one rotation at a low speed. Due to the slow forward / reverse rotation of the aperture drive motor 20, the rotary encoder 202 outputs the origin signal at least once and the proximity switch 27 is turned on at least once.

When the heald frame 11 is arranged near the intermediate position Y1, the rotation position of the opening drive motor 20 and the height position of the heald frame 11 are the positions indicated by L2 in FIG. Assuming that the frame 11 is located at the position where the frame 11 is rising toward the uppermost position, the arrow Q3 in FIG.
0 indicates a state in which the rotation is half-reversely rotated at a low speed, and an arrow Q4 indicates a state in which the opening drive motor 20 is rotated once forward at a low speed.
Due to the slow forward / reverse rotation of the aperture drive motor 20, the rotary encoder 202 outputs the origin signal at least once and the proximity switch 27 is turned on at least once.

The control circuit 22 calculates the value of the intermediate position between the rise and fall of the ON signal based on the input of the origin signal and the input of the ON signal of the proximity switch 27, and calculates the value at the time of input of the ON signal of the proximity switch 27. Rotational position δ1 or δ
Figure 2 In FIG. 4B, the rotational position of the proximity switch 27 when the ON signal is input is the intersection δ between the dashed line and the circle E.
1 or δ2. One rotation range of the opening drive motor 20 is determined based on the third rotation position β4. 4A and 4B, the range from one of the adjacent solid lines in the radial direction to the other is the one rotation range of the opening drive motor 20. A and B in FIG. 4B are examples of one rotation range, and one rotation range A and B correspond to the intermediate position Y1.
The control circuit 22 specifies one rotation range A, B corresponding to the intermediate position Y1 based on the detection of the rotation origin position when the power of the loom is turned on again and the ON of the proximity switch 27. When one rotation range when the opening drive motor 20 is rotating forward is divided into the first half and the second half, the first half of the one rotation range A is indicated by A1, and the second half of the one rotation range A is indicated by A2. . 1
The first half of the rotation range B is indicated by B1, and the second half of the one rotation range B is indicated by B2.

Assuming that the grasped rotation position is included in the latter half A2 of one rotation range A, the control circuit 22 determines that the heald frame 11 is descending when the ON signal of the proximity switch 27 is input, that is, the rotation at that time. Specify that the position is δ1.
Assuming that the grasped rotation position is included in the first half B1 of the one rotation range B, the control circuit 22 turns on the proximity switch 27
When the signal is input, the heald frame 11 is specified to be ascending, that is, the rotational position at that time is δ2. That is, the control circuit 22 specifies which of the first half and the second half of the detected rotation position δ1 or δ2 in the one rotation range A or B of the opening drive motor 20.

When the rotation position δ1 or δ2 obtained by the control circuit 22 is included in the latter half of one rotation range of the opening drive motor 20, the heald frame 11 is located on the left half of the circle E. That is, the heald frame 1
1 is one way from the highest position to the lowest position. When the rotation position δ1 or δ2 grasped by the control circuit 22 is included in the first half of one rotation range of the opening drive motor 20, the heald frame 11 is on the right half of the circle E. In other words, the heald frame 11 is on one way in which the heald frame 11 shifts from the lowest position to the highest position with respect to the normal rotation of the opening drive motor 20.

In the control circuit 22, the proximity switch 27 is turned on.
The third rotation position β4 is stored as the reference rotation position based on the rotation position δ1 or δ2 at the time of the above. For example, when the rotation position when the proximity switch 27 is turned on is δ1, the position obtained by subtracting the restriction amount Xo from the position where the opening drive motor 20 has rotated twice forward from the rotation origin position α2 is the reference rotation position of the opening drive motor 20. To be stored. The reference rotation position β4 of the opening drive motor 20 stored in the storage circuit 24 is
It is used to specify a relative positional relationship between the rotation position of the opening drive motor 20 and the height position of the heald frame 11.

Opening control device C1, rotary encoder 2
The reference numeral 02 and the proximity switch 27 constitute reference position measuring means for rotating only the opening drive motor 20 to measure the reference rotation position of the opening drive motor 20 corresponding to the reference height position of the heald frame 11. When the above-described reference position measurement control in which only the opening drive motor 20 is operated is completed, the control circuit 22 of the opening control device C1 outputs a measurement completion signal to the loom control computer Co. Loom control computer Co
Is the backup angle θ in response to the input of the measurement completion signal.
The information of i is sent to the control circuit 22. The control circuit 22 performs synchronization based on the input of the backup angle θi information. This synchronization is to adjust the loom rotation angle corresponding to the rotation position of the opening drive motor 20 to the backup angle θi based on the rotation position information obtained from the rotary encoder 202 of the opening drive motor 20. In this synchronization, only the opening drive motor 20 is operated, and the loom drive motor Mo is not operated.

When the synchronization is completed, the control circuit 22 of the shedding control device C1 serving as the synchronization means outputs a synchronization completion signal to the loom control computer Co. The loom control computer Co performs start preparation reverse rotation control based on the input of the synchronization completion signal. The reverse rotation control for start-up is performed by synchronizing the loom drive motor Mo and the shedding drive motor 20 with a slow reverse rotation of the loom for one or more rotations as shown in FIG.
As shown by a dashed line in FIG. The start preparation reverse rotation control is performed to increase the initial beating force. If the loom is reversely rotated more than one rotation, the rotary encoder 23 outputs an origin signal. The loom rotation angle of the rotary encoder 23 grasped based on the output of the origin signal is determined by the loom drive motor Mo.
It is a mechanical origin that will not be lost if power to the power supply is stopped. Loom control computer Co and control circuit 22
Detects the loom rotation angle θ based on the loom rotation angle information from the rotary encoder 23 after the output of the origin signal. Further, the loom control computer Co updates and stores the loom rotation angle after the output of the origin signal. The start-up preparation reverse rotation control is performed until the loom rotation angle θ becomes the loom rotation angle θ1 corresponding to the state in which the reed 29 is located at the rearmost position.

If the difference | θi−θo | between the loom rotation angle θo and the backup angle θi when the rotary encoder 23 outputs the origin signal does not exceed the predetermined angle difference Δθ, the loom control computer Co starts weaving. A signal is output to the shedding control device C1, and the loom driving motor Mo is started. The control circuit 22 starts operation control of the opening drive motor 20, that is, opening control, based on the input of the weaving start signal. If the difference | θi−θo | exceeds the predetermined angle difference Δθ, the loom control computer Co outputs a weaving prohibition signal to the shedding control device C1.

After the output of the weaving prohibition signal, the loom control computer Co serving as the loom operation prohibition control means starts the start switch 2.
Waiting for the input of the ON signal accompanying the ON operation of No. 6. When the start switch 26 is turned ON, the loom control computer C
o and the aperture control device C1 again execute the above-mentioned synchronization control program.

In the first embodiment, the following effects can be obtained. (1-1) When the power of the loom is turned off, the rotational position information of the incremental type rotary encoder 23 is lost, and the rotational angle of the loom cannot be known. Turn on the power of the loom
In order to grasp the loom rotation angle when N is reached, there is a method of outputting the origin signal from the rotary encoder 23 to grasp the loom rotation angle. For this purpose, the loom drive motor Mo is used.
Need to be activated. In order to output the origin signal from the rotary encoder 23, the loom may be rotated once.
Hit 1 In FIG. 2B, the warp T is a weft Y on the weave W1.
However, if the warp T does not grip the weft Y on the weave W, the weft Y on the weave W may be loosened and a weaving step may occur.

In this embodiment, synchronization is performed using the stored backup angle θi. After this synchronization, the loom control computer Co and the shedding control device C1, which constitute the rotation origin position detection control means, perform the reverse rotation of the loom driving motor Mo while synchronizing the shedding drive motor 20 and the loom drive motor Mo to rotate the rotary encoder 23. Output the origin signal. Therefore, only the loom drive motor Mo is not operated to output the origin signal. As a result, the warp T becomes the woven fabric W
Beating in a state where the weft Y on the cloth fell W1 is not gripped is avoided.

(1-2) When the loom rotates while the power of the loom is turned off, the actual loom rotation angle deviates from the stored backup angle θi. When the load applied to the main shaft is in an unbalanced state, the displacement may occur. The predetermined angle difference Δθ is set so that the woven fabric is not adversely affected when the deviation, that is, the difference | θi−θo | does not exceed the predetermined angle difference Δθ. Difference | θi−θo
Is too large to exceed the predetermined angle difference Δθ, the woven fabric may be adversely affected. In the present embodiment,
If | θi−θo | exceeds the predetermined angle difference Δθ, the operation of the loom is prohibited. Therefore, weaving is not started in a state where | θi−θo | exceeds the predetermined angle difference Δθ, and the adverse effect is avoided.

(1-3) The difference | θi−θo | is a predetermined angle difference Δ
If it does not exceed θ, weaving is performed, but the difference | θi−θo | within the predetermined angle difference Δθ is corrected by the shedding control including the synchronization control after the start of weaving. That is, the rotation position of the opening drive motor 20 is corrected so that the loom rotation angle corresponding to this rotation position matches the actual loom rotation angle θ. Since the correction amount at this time is within the predetermined angle difference Δθ, there is no adverse effect on the woven fabric.

(1-4) When the origin signal is output from the rotary encoder 23 after the first synchronization, the loom control computer Co updates and stores the loom rotation angle after the output of the origin signal as the backup angle θi. Therefore, the actual loom rotation angle θo and the backup angle θi when the origin signal is output from the rotary encoder 23 after the re-synchronization is the same. As a result, the difference | θi−θo | after the re-synchronization is eliminated, and the operation of the loom is permitted after the re-synchronization. Difference | θi−θ
difference | θi−θo | when o | exceeds a predetermined angle difference Δθ |
Is easily corrected without affecting the woven fabric.

In the present invention, the following embodiments are also possible. (1) When the forward rotation inching switch or the reverse rotation inching switch for inching operation of the loom driving motor Mo is turned on after the power of the loom is turned on, the first operation is also performed.
Synchronization and origin signal output are performed in the same manner as when the start switch 26 of the embodiment is turned ON. (2) | θi−θo regardless of the magnitude of the difference | θi−θo |
In the case of | 全 て 0, synchronization should be performed again. (3) Re-synchronization is performed based on the loom rotation angle information obtained from the rotary encoder 23. (4) Automatic synchronization is performed again.

[0050]

As described above in detail, in the present invention, the loom rotation angle detected by the incremental type loom rotation angle detecting means is stored immediately before the power of the loom is turned off, and the shedding drive after the power is turned on is stored. When synchronizing the rotation position of the motor and the loom rotation angle, only the shedding drive motor is used by using the stored loom rotation angle and the rotation position of the shedding drive motor detected by the rotation position detecting means. Is rotated to perform the above-mentioned synchronization, so that there is an excellent effect that it is possible to prevent the occurrence of the weaving step due to the beating at the time of the synchronization.

[Brief description of the drawings]

FIG. 1 is a combination diagram of an opening device and a control block diagram showing a first embodiment.

FIG. 2A is a cross-sectional view of a main part showing a warp opening state when the operation of the loom is stopped. (B) is a principal part sectional view showing an opening state of a warp at the time of beating.

FIG. 3 is a front view showing a part of a driving force transmission path.

FIGS. 4A and 4B are explanatory diagrams illustrating reference position measurement.

FIG. 5 is a graph showing a relationship between a height position of a heald frame and a rotation position of an opening drive motor 20;

FIG. 6 is a flowchart showing a synchronization control program.

FIG. 7 is a flowchart showing a synchronization control program.

FIG. 8 is a flowchart showing a synchronization control program.

FIG. 9 is a flowchart showing a synchronization control program.

[Explanation of symbols]

11 ... Heald frame. 20 ... Opening drive motor. 202 ... A rotary encoder which serves as a rotational position detecting means and also constitutes a reference position measuring means. 23 ... Rotary encoder serving as loom rotation angle detection means. 27 ... Proximity switch constituting reference position measuring means. Co: a loom control computer which functions as backup storage means and loom operation prohibition control means and also constitutes a rotation origin position detection control means. C1... An aperture control device serving as a synchronization means and constituting a rotation origin position detection control means.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuyasu Abe 2-1-1 Toyota-cho, Kariya-shi, Aichi F-term in Toyota Industries Corporation (reference) 4L050 AB01 AB09 CA17 CC03 CC23 EA01 EA02 EA10 EA14 EB05 EC15 ED01 ED05 ED23 EE01 EE07

Claims (8)

[Claims] 1. A loom having an opening device for driving a heald frame by an opening drive motor independent of a loom drive motor, wherein the loom rotation angle detected by an incremental loom rotation angle detecting means immediately before turning off the power of the loom. When the rotation position of the opening drive motor is synchronized with the loom rotation angle after the power is turned on, the stored loom rotation angle and the opening drive detected by the rotation position detection unit are synchronized. A synchronization control method in a loom for performing the synchronization by rotating only the opening drive motor using the rotation position of the motor. 2. The loom according to claim 1, wherein, prior to the synchronization, the sheave frame is rotated by rotating only the shedding drive motor to measure a reference rotation position of the shedding frame corresponding to a reference height position of the heald frame. Synchronization control method. 3. After the synchronization, the shedding drive motor and the loom drive motor are rotated in synchronization with each other, and during this time, the loom rotation angle at the time of output of the origin signal output from the loom rotation angle detection means is determined. The method according to claim 1, wherein the operation of the loom is permitted when the difference from the stored loom rotation angle is equal to or less than a predetermined angle difference, and the operation of the loom is prohibited when the difference exceeds the predetermined angle difference. Item 3. A method for controlling synchronization in a loom according to any one of Items 2. 4. When the operation of the loom is permitted, the loom rotation angle corresponding to the rotation position of the opening drive motor is adjusted to the actual loom rotation angle so as to eliminate the difference with the operation of the loom. 3. A method for controlling synchronization in a loom according to item 3. 5. The synchronization control method for a loom according to claim 3, wherein the synchronization is performed again when the operation of the loom is prohibited. 6. A loom having an opening device for driving a heald frame by an opening drive motor independent of a loom drive motor, an incremental loom rotation angle detecting means for detecting a rotation angle of the loom; Backup storage means for storing the loom rotation angle detected by the means; rotation position detection means for detecting the rotation position of the opening drive motor; loom rotation angle stored in the backup storage means; and the rotation position detection means Using the rotational position of the opening drive motor detected by the above-described method, and a synchronization machine for rotating only the opening drive motor to synchronize the rotational position of the opening drive motor with the rotation angle of the loom. Synchronization control device. 7. A reference position measuring means for measuring a reference rotation position of the opening drive motor corresponding to a reference height position of the heald frame by rotating only the opening drive motor before the synchronization. A synchronization control device for a loom according to claim 6. 8. A rotation origin position detecting means for synchronously rotating the shedding drive motor and the loom drive motor and outputting a first origin signal from the loom rotation angle detecting means after the synchronization by the synchronization means. Control means, when the difference between the loom rotation angle at the time of output of the origin signal and the stored loom rotation angle is equal to or smaller than a predetermined angle difference, the operation of the loom is permitted, and the measurement difference is the predetermined angle difference. The loom synchronization control device according to any one of claims 6 and 7, further comprising a loom operation prohibition control unit that prohibits the operation of the loom when the number exceeds the limit.