JPS633054B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for actively feeding pile warp threads in a pile loom.

In pile weaving for towels, etc., the pile warp and ground warp are wound on separate beams, the tension of the pile warp is made weaker than the tension of the ground warp, and the amount of feed from the ground warp is made different, and special reeds are used. The pile is woven by striking, weaving, etc.

For example, first weave two or several weft yarns a little away from the front of the weaving (loose pick; hereinafter referred to as LP), then weave the inserted weft threads with a beater and press them together with the previous few weft yarns up to the front of the weaving. (Fast pick; hereafter FP), only the pile threads are pulled together and loops appear on the fabric surface. In the following explanation, a case will be explained in which a three-pile structure is woven.

This sending of the pile length is to send out the pile length just before FP, and it directly leads to the pile effect (that is, the pile is formed uniformly at a predetermined height). Sufficient and appropriate control is necessary, but due to the intermittent nature of the delivery, although various control methods have been proposed, none have been developed that are satisfactory in terms of performance. The current situation is that there is no such thing.

There are various reasons why this control is difficult, but
The control must follow the beating of the loom, which has become particularly fast in recent years, and the control must incorporate the fact that the beam diameter of the pile warp gradually decreases as pile weaving progresses. and that low tension is required to facilitate pile removal, and the tension must not increase after reeding.
The main ones include: In other words, due to these factors, there is an excess or deficiency in the amount of output from the pile tube,
This impairs the pile effect.

Conventionally, the technology for compensating for excess or deficiency in the amount of pile feed is to adjust the number of teeth to feed the beam to the ratchet wheel based on the amount of displacement of the tension roller, which moves in proportion to the tension of the pile diameter. There are things that change.

However, with this method, rotating the pile warp beam only during FP could cause mechanical damage due to inertia, so it was sent out every time, including during LP, and the required amount was accumulated just before FP. However, this system has various disadvantages because the tension roller is largely displaced. First, during FP, unnecessary tension is applied to the pile warp due to the inertia of the tension roller. In other words, the difference in the degree of inertia (depending on the position at which the tension roller is stationary) leads to tension fluctuations, so naturally the height of the pile changes from FP to FP. Next, when the tension roller returns after FP, it applies tension to the pile warp yarns, which causes the pile formed by the FP to be pulled out, which also causes pile height irregularities. Furthermore, since the tension roller moves frequently, it is not possible to keep the tension of the pile warp yarns small and constant, and therefore the pile is not clean.

An object of the present invention is to maintain the normal delivery of the pile warp while sufficiently following the increase in the speed of the loom without affecting the pile effect in any way.

That is, in this invention, a memory is interposed between the pile transfer signal generation unit and the beam drive motor, and only the excess or deficiency of the pile transfer amount in a certain FP is detected in the form of the displacement of the guide roller. is stored in the memory, and the amount of beam feed in the next FP is adjusted based on this stored content. Moreover, unlike the conventional method in which the pile warp is sent out every time, in the present invention, the pile warp is sent out only during FP, that is, once every three revolutions of the loom.

The present invention will be described below using embodiments shown in the accompanying drawings.

In Fig. 1, the warp yarns sent out from the pile warp beam B1 and the ground warp beam B2 reach the heddle H via guide rollers R1 and R2, respectively, and after beating by the reed R, they pass through the take-up roller. and is wound onto the winding beam B3. The pile warp beam B1 is driven by a motor M via a suitable drive mechanism, such as a worm gear provided on its rotating shaft and a transmission T, and sends out the pile warp on the pile warp beam B1. It is rotating as much as possible.

What is shown in FIG. 2 is an example of a pile feed amount detection section in the apparatus of the present invention. Here, the displacement of the guide roller R1 caused by a change in the pile longitudinal tension due to an excess or deficiency in the delivery amount is used as a representative value of the delivery amount.

An arm AM is supported approximately in the longitudinal center of a fixed fulcrum 0 provided at an appropriate position above the guide roller R1, and its upper end is biased forward by a tension spring S. Further, the lower end of this arm AM engages with a pin R1' projecting from the end surface of the guide roller R1, and integrally supports a lever L extending downward at its upper end. The lower end L1 of the lever L is formed into a shoe shape, and proximity switches S1, S11, S2, and S22 are provided at the front and rear of the lower end, spaced apart and facing each other.

These switches S1, S11, S2, S22
It is preferable that the sensors are spaced apart from each other at equal distances in the front-rear direction so that their sensitive surfaces face a virtual arc surface drawn around the fixed fulcrum O of the arm AM. The degree of this separation is determined by each switch S.
1. If the operating range of S11, S2, and S22 (i.e., the range that responds when the lower end L1 of the lever approaches) is equal to the amount of delivery When the lower end L1 moves due to excess or deficiency, for example, it first enters the operating range of switch S1,
Further, when the lower end L1 moves in the same direction, it is determined so that it falls within the operating range of both switches S1 and S11 (the relationship between switches S2 and S22 is also the same).

When the amount of pile feed is insufficient, the pile tension increases and the guide roller R1 is displaced forward. As a result, the arm AM swings clockwise in the figure about the fixed fulcrum O against the tensile force of the spring S, and the lower end L1 of the lever is displaced forward and the switch S
1, and the switch S1 senses this. Even if the delivery amount is corrected in response to the switch S1, if the delivery amount still becomes insufficient, the lower end of the lever L1 will be further displaced forward, entering the operating range of the switch S11, and the switches S1 and S11 will respond at the same time. (The process will be explained in more detail later).

When the amount of pile warp delivery becomes excessive, the pile warp tension decreases, and as a result, arm AM swings counterclockwise about fixed fulcrum O under the influence of the tensile force of spring S, and therefore the lower end of lever L1 It is displaced rearward and enters the operating range of switch S2, and switch S2 senses this. Even if the sending amount is corrected by the response of switch S2, if the sending amount still becomes insufficient,
The lower end L1 of the lever is further displaced forward and enters the operating range of switch S22, and switches S2 and S
22 will be sensitive at the same time (further process will be detailed later).

By the way, the configuration of the detection section as described above is very advantageous in several respects. First of all, a force of a spring S is applied to the pile warp through the guide roller R1, and the purpose of this spring S is to apply tension to the pile warp. Since the guide roller only needs to be moved by the amount of excess or deficiency, there is no need to make a large displacement, and an unnecessarily strong spring is not required for movement, so the pile warp tension can also be kept small.

Secondly, unexpected disturbances naturally occur in the delivery and other processes, but the effects of these disturbances all appear in the pile tension. In the case of the above-mentioned detection unit, the displacement of the guide roller directly connected to this longitudinal tension is taken as the representative value of the delivery amount.
In other words, detection can be performed in a manner that also includes disturbances.

By the way, in relation to the length of the lever L mentioned above, each switch S1, S11, S2,
The separation distance of S22 and the like are determined as appropriate depending on the conditions at the site, for example, how much variation in the delivery amount is allowed as an allowable error.

These proximity switches S1, S2 and S11,
S22 influences the rotation of the drive motor M of the pile warp beam B1 through the circuit shown in FIG. 3, and adjusts the pile warp delivery amount. This circuit has a time setter 1, a low speed setter 2, a servo memory 3, and a power regulator 4. Time setting device 1
is composed of a circuit such as a one-shot multivibrator, and outputs a pile weave adjustment signal to the servo memory 3 when signals are input from the switches SP, SC, and SD via the AND circuit G1. Here, each switch SP, SC, and SD will be explained.

Switch SP is a switch for outputting a pile weaving command signal. When this is turned ON by a command from Dobby or the like, the signal is sent to the circuit via the AND circuit G1, and a pile is woven at a desired warp direction position on the woven fabric.

The switch SC is, for example, a limit switch installed opposite to the crankshaft of a loom, and is automatically turned on every revolution of the crankshaft, and its beating signal is output to the AND circuit G1.

The switch SD is, for example, a limit switch installed opposite to the terry shaft of a loom, and is automatically turned on every several revolutions (for example, three revolutions) of the crankshaft, and outputs a pile transmission signal to the gate G1.

In the simplest form of the invention, it is sufficient to connect only the switch SD directly (that is, without going through the AND circuit G1) to the time setter 1 to provide the pile passage signal. However, the switch
By adding SC and SD, it is possible to form piles anywhere on the woven fabric and change the timing of pile weaving as needed.

The duration of the output from the time setting device 1 to the servo memory 3 can be adjusted arbitrarily by changing the time constant of the one-shot multivibrator, for example, and the duration of the output from the time setting device 1 to the servo memory 3 can be adjusted arbitrarily by changing the time constant of the one-shot multivibrator. This time constant determines the amount of warp yarn to be sent out.

The servo memory 3 is constituted by a potentiometer P and a servo motor _Ms , and the input from the time setter 1 is appropriately attenuated by the potentiometer P and then output to the amplifier A2. Further, the rotation shaft of the servo motor M _s is connected to the adjustment shaft of the potentiometer P, and the attenuation value of the potentiometer P can be adjusted by rotating the servo motor M _s . The attenuation value of the potentiometer P is adjusted by the aforementioned proximity switches S1 and S2. That is, each of these switches
When turned on, the servo motor is
A voltage is applied to M _s . Here, since the proximity switch S2 is connected to the amplifier A1 via the inverter G2, the output value of the amplifier A1 when the proximity switch S2 is ON is opposite in polarity to the output value when the proximity switch S1 is ON. Therefore, the rotation direction of the servo motor M _s is also different, so that the damping value of the potentiometer P can be increased or decreased as appropriate. By turning ON/OFF the switches S1 and S2, excess or deficiency of the feed amount is detected, and the output from the time setter 1 is corrected and output, and the output is stored. When the time setter 1 sets a large pile warp delivery amount, the servo memory 3 makes a slight correction to compensate for the excess or deficiency in the delivery amount.

The low speed setting device 2 is for supplying constant power to the motor M during ground weaving and pile weaving, and thereby controls the pile warp beam B1 to move the pile warp beam B1 to the pile in accordance with the feed rate of the ground warp, regardless of the pile weaving. The pile warp is fed at a fixed amount by adding the required amount of yarn.

The output of the servo memory 3 is input to the power regulator 4 after being amplified by the amplifier A2. This power regulator 4 is composed of, for example, a thyristor, etc.
The phase angle is controlled by the input value to the gate terminal, that is, the output value of the amplifier A2, thereby appropriately adjusting the output value of the motor M driving power source (not shown).

A portion of the current flowing into the motor M from the power supply is fed back through the resistor 5 to the output of the amplifier A2, and a portion of the back electromotive force generated by the rotation of the motor M is fed back to the input of the amplifier A2. Negative feedback has been given. This is because the pile warp is sent out in an extremely short time during FP, so the rotation speed of the motor M is rapidly increased to a constant rotation speed, and this constant rotation speed is maintained during the voltage application time to the motor M. , to keep the pile warp delivery amount constant. That is, when the power supply voltage is applied to the motor M, the current flowing into the motor M is large, and becomes smaller as the rotation of the motor M increases. On the other hand, the back electromotive voltage generated by the motor M increases as the motor M rotates. Therefore, when a voltage is applied to the motor M, a current is first fed back to the output of the amplifier A2 via the resistor 5. Therefore, a current higher than the output current value of the amplifier A2 flows into the power regulator 4, and the amount of current supplied to the motor M also increases, so the rotational speed of the motor M increases rapidly. Accordingly, the amount of current flowing in is limited and the amount of feedback current is also reduced. On the other hand, as the rotation of the motor M increases, the back electromotive voltage generated thereby also increases, and the amount of negative feedback to the input section of the amplifier A2 also increases. Then, the power supply voltage at equilibrium between the output voltage from the servo memory 3 and this back electromotive voltage is applied to the motor M,
Motor M rotates at a constant speed. The switch S11 turns ON, and when the lower end L1 of the lever enters the operating range of the switch S11 even if the feed amount is increased, the motor is rotated at the maximum rotation speed regardless of the position of the potentiometer. Switch S22 is turned on, and even if the feed amount is decreasing, the excessive state continues and switch S2 is turned on.
When the lower end L1 of the lever enters the operating range of 2, the motor stops completely without moving at low speed, regardless of the position of the potentiometer. Even when the lower end L1 of the lever enters the operating range of the switch S11 or S22, the servo motor of the servo memory 3 continues to operate because both the switches S1 and S2 are operating.

The operation of the sending device having the above configuration is shown in Fig. 4A.
~K will be used to explain the three-pile structure as an example.

Figure 4 A to C are switches SC, SD, and SP, respectively.
4D shows the output signal of the servo memory 3, and FIG. 4D shows the input signal to the potentiometer P of the servo memory 3.
are the proximity switches S1, S2, S11, respectively.
The output signal of S22 is shown in FIG.
FIG. _4J shows the amount of movement of the potentiometer P of the servo memory 3, and FIG. 4K shows the amount of feed of the pile warp threads.

Here, as shown in FIG. 4A, the switch SC generates a beating signal for each crank cycle and inputs it to the AND circuit G1.

From the switch SD, as shown in Figure 4B,
Time t ₁ for each of 3 crank cycles
A transmission signal is generated every ~ _t16 , and the AND circuit G1
is input.

From the switch SP, in this example, time t ₂ ,
Since the pattern is assumed to be ground weave at t ₃ and pile weave at the others, the pile weave command signal is generated except from a time slightly before time t ₂ to immediately before time t ₄ , as shown in FIG. 4C. It is input to the AND circuit G1. However, this is just an example of the generation pattern of the pile weaving command signal, and it goes without saying that an appropriate pattern can be used depending on the pattern of the woven product.

When the AND condition is satisfied between the above signals, that is, at every time _T1 , _T4 to _T16 , a signal is inputted from the AND circuit G1 to the time setter 1. In response to these signals, the time setter 1 generates a predetermined time signal at every time T ₁ , T ₄ to _{T 16} as shown in FIG. is input. For example, the signal output time from time _T1 is determined by determining the time constant.

On the other hand, as the lower end L1 of the lever approaches the proximity switches S1 and S2 due to a change in the tension of the pile warp yarns, a signal as shown in the figure (FIGS. 4E and F) is input to the amplifier A1. After this signal is amplified by the amplifier A1, it is input to the servo motor _Ms , and the servo motor _Ms changes the amount of attenuation of the potentiometer P as appropriate.

That is, at time T1, the pile warp delivery amount is appropriate (even if there is some variation, it is within the set tolerance range), the pile warp tension is also appropriate, and the guide roller R1 ( Second
(Figure) is not displaced, and accordingly, the lower end L1 of the lever is not displaced (even if it is displaced, it is within the set tolerance range), and the proximity switches S1 and S2 do not generate signals and do not move the servo motor. Therefore, pile warp yarns corresponding to the feed amount stored in the servo memory 3 are sent out.

At times T ₂ and T ₃ , as described above, in this example, the pile weaving command signal is not generated from the switch SD, so the ground weaving is performed. During this time, the beam feed amount is set by the low speed setting device 2.

At time T ₄ , the pile weaving is restarted as shown in Figure 4C, but the feed amount at this time is the same as that at time T ₁ .
Since the feed amount at time T1 is stored in the servo memory 3, it is the same as the feed amount at time _T1 . However, at time T ₄ , the beam winding warp is smaller than at time T ₁ , so even though the beam feed amount is the same, the pile warp delivery amount is smaller (that is, shortage L), and therefore the time At _T5 , the tension of the pile warp yarns increases, the guide roller R1 is displaced forward, and the lower end of the lever L1 is moved toward the proximity switch S.
1, the proximity switch S1 is turned ON, and as shown in _FIG . Then, the servo motor M _s rotates to reduce the amount of attenuation of the potentiometer P. Therefore, the amount of beam feed increases. This rotation of the servo motor M _s is caused by the normalization of the pile warp delivery amount due to the increase in the beam feed amount, which makes the tension of the pile warp yarns appropriate, causing the guide roller R1 to return to the rear, and the lower end of the lever L1 to move the proximity switch S1. It continues until it goes out of the operating range.

At time _T6 , the pile delivery amount has already been normalized. The beam feed amount at this time is the same as the feed amount at time _T5 . But the time
At T ₆ , the beam diameter is smaller than at time T ₅ , so even though the beam feed amount is the same, the pile feed amount is smaller (that is, insufficient).

As a result, at time _T7 , the guide roller R1 is displaced forward, the lower end of the lever L1 enters the operating range of the proximity switch S1, the proximity switch S1 is turned ON again, and the insufficient sending signal is transmitted to the servo memory 3.
is input to the servo motor M _s , and the servo motor M _s
rotates to reduce the amount of attenuation of the potentiometer P, and the amount of beam feed increases.

However, this increase in the feed amount is not sufficient, so the proximity switch S1 is kept in the ON state at time T ₈ , and the feed amount continues to increase, but when the feed is completed at time T ₈ , the pile feed amount returns to normal. , the tension of the pile warp yarns is also optimized, the guide roller R1 returns to the rear, and the lower end L1 of the lever leaves the operating range of the proximity switch S1. That is, the proximity switch S1 is turned off.

At time _T9 , the time is stored in servo memory 3.
Since the feed amount at _T8 is stored, the beam feed amount is the same as at time _T8 .
Since the beam feed amount has increased considerably at time T ₈ , if this is adopted at time T ₉ , when the pile warp output has already normalized, even if the decrease in beam diameter is taken into account, the warp will be sent too much (that is, it will be excessive).

As a result, at time _T10 , the pile warp tension decreases and the guide roller R1 is displaced backward,
Along with this, the lower end L2 of the lever enters the operating range of the proximity switch S2, and the proximity switch S2 turns ON and generates an excessive sending signal, but this signal is inverted by the inverter G2, so the servo memory 3
When the signal is input, the servo motor M _s rotates in the opposite direction to that in the case of the insufficient sending signal. Therefore, the potentiometer P moves in the opposite direction, and the amount of attenuation increases. Therefore, the beam feed amount decreases. However, since the beam length is considerably reduced at time T ₁₀ compared to time T ₈ , even with this reduction in the beam feed amount, the pile feed amount is not sufficiently reduced, and the over-sent state still continues.

The guide roller R1 is further displaced rearward, and the lower end L1 of the lever is beyond the operating range of the switch S2.
It enters the operating range of the proximity switch S22, and the proximity switch 22 is turned on. As a result, a stop signal is generated and the rotation of the drive motor M is stopped. Therefore, the beam is no longer sent, and the amount of the beam sent out through the pile becomes zero. However, since the lower end L1 of the lever has a width in the front and rear, when it enters the operating range of the switch S22, it straddles both operating ranges together with the proximity switch S2, so during this period, the proximity switch S2 is also ON. Since the state continues, an excessive sending signal is output to the servo memory 3, and the potentiometer P continues to move in the direction of increasing the amount of attenuation.

At time T ₁₁ A, the switch S22 is on, so the delivery amount continues to be zero.

When the pile warp delivery amount becomes normal when the FP at time _T12 is completed, the pile warp tension also returns to the appropriate value, and as a result, the guide roller R1 returns to the front, and along with this, the lower end of the lever L1 first moves forward. It is displaced and moves out of the operating range of the proximity switch S22, the proximity switch S22 is turned OFF, and the drive motor M starts rotating at a low speed since the pile weaving command is not issued. Next, the lower end of the lever L1 leaves the operating range of the proximity switch S2, so the proximity switch S2 is also turned OFF, the over-sending signal is no longer output to the servo memory 3, and the potentiometer P
stops moving.

At time _T13 , the pile warp is sent out at a beam feed amount that is commensurate with the amount of attenuation that increased corresponding to the total amount of movement of potentiometer P during the period when proximity switch S2 was ON from time _T10 to _T12 . will be held. Naturally, the amount of beam feed tends to decrease considerably, and together with the fact that the beam diameter is steadily decreasing, the amount of beam feed through the pile tends to be insufficient.

As a result, at time _T14 , the pile longitudinal tension increases, the guide roller R1 is displaced forward against the force of the spring S, and the lower end of the lever L1 is connected to the proximity switch S.
1, the proximity switch S1 is turned on, and an insufficient sending signal is output to the servo memory 3. Therefore, as at time _T7 , the servo motor MS moves the potentiometer P in the direction in which the amount of attenuation decreases, so that the amount of beam feed increases. However, since the beam diameter is decreasing, this increase in feed amount is insufficient.

Therefore, at time _T15 , the insufficient delivery progresses and the pile tension increases further, the guide roller R1 is further displaced forward, the lower end of the lever L1 enters the operating range of the proximity switch S11, and the proximity switch S11 also moves forward.
It becomes ON. As a result, regardless of the position (attenuation amount) of the potentiometer P, the drive motor M begins to rotate at the maximum speed and the beam feed amount increases rapidly.

That is, at time T ₁₆ , the pile transverse delivery amount approaches normal, and along with this, the pile transverse tension also approaches the appropriate value (that is, it decreases from the value at time T ₁₅ ).
, the guide roller R1 returns to the rear by the force of the spring S, and the lower end of the lever L1 first moves to the proximity switch S.
Proximity switch S11 moves out of the operating range of S11.
Since it is turned OFF, the drive motor M does not rotate at the maximum speed. Then, since the lower end L1 of the lever leaves the operating range of the proximity switch S1, the proximity switch S1 is turned OFF, the insufficient sending signal is no longer generated, and the potentiometer P of the servo memory 3 stops moving at that point. In the above, while the proximity switch S1 is on, the potentiometer P continues to move in the direction in which the amount of attenuation decreases.

As described above, when there is an excess or deficiency in the amount of pile feed, the guide roller is displaced back and forth through the corresponding increase or decrease in the pile tension, and this is transferred to the proximity switches S1, S2, S11,
Based on the detection result, the amount of attenuation of the potentiometer in the servo memory 3 is changed to automatically adjust the beam feed amount to compensate for the excess or deficiency of the feed amount of the pile warp. This is to normalize the amount of transfusion.

FIG. 5 shows another embodiment of the circuit from the proximity switches S1 and S2 to the input to the servo motor _Ms of the servo memory 3. This circuit includes AND circuits G3 and G4, a time setter 511,
521, and proximity switches S1 and S are connected to one of the input terminals of AND circuits G3 and G4, respectively.
2. The signal from the switch SC is input to both of the other terminals. The outputs of the AND circuits G3 and G4 are input to time setters 511 and 521, respectively, and the output of the time setter 511 is sent directly or the output of the time setter 521 is sent to the amplifier A via an inverter G5.
The output of the amplifier A5 is input to the servo memory 3, which rotates the servo motor _Ms. time setter 511,
521 is composed of, for example, a one-shot multivibrator, and outputs a pulse signal when a trigger pulse is input. The length of this pulse signal can be freely adjusted by changing its time constant.

The operation of this circuit is basically the same as that shown in FIG. The signal becomes pulse-like, the rotation of the servo motor M _s is adjusted in steps, and the time during which the voltage is applied to the servo motor M during the pile driving interval is short, so that over-adjustment of the potentiometer P can be prevented. That is, the switch
A signal is input from the SC to AND circuits G3 and G4 each time the crankshaft of the loom rotates. The other end L1 is
For example, when the proximity switch S1 is within the operating range, the same signal as the pulse input from the switch SC is input from the AND circuit G3 to the time setter 511, so that the total signal for adjusting the servo motor M _s is Since the application time is shortened and the application time per application is also short, the inertia is also reduced, and over-adjustment of the potentiometer P can be prevented, and as a result, even more precise pile delivery amount adjustment can be performed. For example, when weaving piles with low tension,
This is particularly effective when the tension fluctuation of the pile warp between FPs is small compared to the change in beam diameter.

In addition, in the above explanation, switches S1 and S
2, S11, and S22 are used as proximity switches, but they may also be reed switches, photodetectors, or the like. In addition, although a servo memory was used to adjust the pile warp feed amount during FP, other storage mechanisms, such as digital memory, were used to control the proximity switches S1 and S2.
The stored content, that is, the amount of attenuation may be changed as appropriate depending on the signal from. It is also possible to use the device as a normal warp delivery device without the low speed setting device.

As a result of the present invention described above, the following effects can be obtained.

(a) In this invention, excess or deficiency in the pile warp delivery amount is detected by the displacement of the guide roller (and the lower end of the lever in the sense of amplifying this) via the pile warp tension. Moreover, the delivery amount is not controlled according to the amount of displacement, but if the delivery amount is normal, the guide roller does not move, and if there is an excess or deficiency in the delivery amount, even a slight displacement is enough to identify this. It is enough. Therefore, the disadvantages caused by the large movement of the rollers in the prior art as described above can be avoided.

(b) Regarding a certain FP, the excess or deficiency of the sending amount during the previous FP is checked using, for example, a proximity switch and stored in the servo memory, and compensation is made based on this memory, so the response is early. Therefore, it is possible to sufficiently follow high-speed operation, eliminate irregularities in pile height, and improve quality.

(c) Since two feedback systems, voltage and current, are used simultaneously, it is possible to extract the starting torque to the limit of the drive motor's own maximum performance in a short period of time. In the case of pile weaving, the delivery of the pile warp is intermittent, so the frequency of starting and stopping of the device is very high, so being able to do this is particularly effective.

(d) As mentioned in (b) above, compensation is performed for the next FP based on the memory contents of the previous FP, and since this is repeated, the beam feed is adjusted to incorporate the decrease in beam diameter as the pile weave progresses. Amount adjustments are made. That is, the beam diameter can be reduced and control commensurate with the degree of reduction can be performed.

(e) Due to the intermittent motion, in conventional mechanical systems, parts are subject to severe damage due to impacts caused by the inertia of related parts, but this invention eliminates this at all, and has the effect of (c) above. Together, the beam can be rotated very efficiently.

(f) A spring is attached to the guide roller, but as mentioned above, this spring only needs to be very weak, so it will not have an adverse effect on the pile tension.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a pile weaving device using the sending device of the present invention, Fig. 2 is a detailed view of the area around the guide roller G1 of Fig. 1, and Fig. 3 is a motor M adjustment device of Fig. 1. FIG. 4 is a schematic diagram showing the amount of output signal movement of each element in FIG. 3, and FIG. 5 is a circuit diagram showing a part of another embodiment of the present invention. B1... Pile warp sending beam, R1, R2... Guide roller, S1, S2, S11, S22... Proximity switch, M... Motor, SC, SD, SP... Switch, A1, A2, A5... Amplifier, 1,511,5
21... Time setting device, 2... Low speed setting device, 3... Servo memory, P... Potentiometer, M _s ... Servo motor, 4... Power regulator, G1, G3, G4... AND circuit, G2, G5... Inverter.

Claims (1)

[Claims] 1. In a pile fabric in which the pile warp beam is actively rotated by a drive motor and the pile warp is sent out via a guide roller, a method for specifying the time to start sending out. A timing signal generator that outputs a signal, whose output terminal is connected to the input terminal of a time setter, and a time setter that receives the above signal and outputs a predetermined time signal, whose output terminal is connected to a memory. A memory having a time setting device connected to the input terminal of the attenuation section, an attenuation section that attenuates and outputs the input signal, and an attenuation rate changing section that changes and stores the attenuation rate.
A memory in which the output terminal of the damping section is connected to the input terminal of the power regulator, a power regulator that instructs the motor to rotate according to the input signal, and a power regulator whose output terminal is connected to the motor, and a pile warp feeder. When the guide roller changes from the position commensurate with the normal feed amount due to the pile warp tension increasing or decreasing due to excess or deficiency of quantity, this displacement and its direction are detected and a pair of detection units are installed to ensure that one of them turns ON. At the end, there is a detection end whose output terminal is connected to the input terminal of the attenuation rate changing section of the memory, and a low speed setting device that constantly outputs a signal commensurate with the amount of ground transmission. A pile warp delivery device for a pile loom consisting of a low speed setting device connected to an input terminal. 2. The pile warp delivery device for a pile loom according to claim 1, wherein the memory includes a potentiometer as a damping section and a servo motor as a damping rate changing section. 3. The output terminal of a switch that instructs the motor to stop or rotate to maximum speed is connected to the input terminal of the power regulator, giving priority to other signals. Pile warp delivery device for pile looms.