JPS591814B2 - Loom fitting method and device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method and device for fitting a loom.

Usually, a loom is equipped with various abnormality detection devices such as a weft detection device and a warp breakage detection device, and when an abnormality that causes a weaving flaw occurs, the loom is stopped to prevent the occurrence of large weaving flaws. It has become.

However, in rare cases, large weft flaws may occur in looms, such as when continuous weft insertion is not possible due to false detection, etc. In this case, the loom must be stopped, the cause of the flaw removed, and the flaws repaired. Work is required.

In this repair work, an operation is performed to remove several weft yarns that have been incompletely inserted, but this operation naturally moves the loom to the presto beam side and often loosens the warp yarns at the same time, restarting the loom. The work involves returning the moved fabric to its previous position and restoring the warp tension to its normal state.
We have to do what is called a meeting process.

Conventionally, this alignment was done manually, but it required great skill and was a time-consuming task.

In this operation, the reed is usually placed in the frontmost position, the warp beam clutch is disengaged, and the weaving density adjusting device and cross beam are manually rotated in the forward direction to ensure that the weave is moved from the reed to the prestroller side.

The weave density regulator clutch is then disengaged to manually reverse the warp beam.

Through this operation, the warp threads that have become relaxed are wound around the warp beam, and when further force is applied to reverse the warp, the cross beam pulled by the woven fabric slips the friction clutch and rotates (reverse rotation).
Then, the warp yarns are further wound around the warp beam, the fabric is pulled out from the cloth beam, and the front of the fabric moves toward the reed.

When the warp beam is further reversed after the woven cloth comes into contact with the reed, the progress of the woven fabric is stopped by the reed, and the tension in the warp yarns increases.

The operator senses by touch that the warp tension has reached an appropriate value, stops the rotation of the warp beam, connects the warp beam and the clutch of the weaving density adjustment device, and completes the weaving work.

In this state, the front of the fabric is in its normal position, and the tension of the warp and fabric is normal.

If this operation is performed by an experienced person, it can be performed in a fixed procedure, but if performed by an unskilled person, this operation will be difficult, for example, the warp beam may be reversed too much and excessive tension is applied to the warp threads Then, rotate the warp beam forward to release Orimae from the reed,
The above-mentioned matching operation may be performed again to return the warp tension to a normal value.

If excessive tension is applied in this manner, when warps having viscoelasticity are used, there is a risk that the warps will be elongated and the texture of that portion may change.

Even in the case of warp yarns with low viscoelasticity, the warp tension can be adjusted depending on whether the warp tension is adjusted by reversing the warp beam, or when the warp beam is reversed too much and the warp tension is normalized while rotating forward. Even if they are the same, there will be a difference in the tension of the woven fabric due to the effect of frictional force during movement of the woven fabric.

This difference in the tension of the woven fabric is also a cause of weaving steps, so it is necessary to separate the woven fabric from the reed again and perform the above-mentioned mating operation, which is cumbersome.

The present invention involves performing normal fitting in advance by a skilled person, and then vibrating the system consisting of the warp and the woven fabric using a vibrator.
The vibration state of the system at that time is measured, and during the matching work, the system consisting of the warp and woven fabric is vibrated with a vibrator, and in this state, various clutch operations are performed, the warp beam is reversed, and the woven fabric is The warp beam is brought into contact with the reed located at the frontmost position to bring the weaving cloth to its normal position, and the warp beam continues to be reversed to apply tension to the warp threads. Changes in the vibration state of the machine are detected by a geophone, and the reversal is stopped when the previously measured value is reached, allowing anyone to easily perform mouth matching in the same way as an expert. It is something.

Further, in the present invention, a motor for reversing the warp beam is attached to the warp beam, and a geophone outputs a signal when detecting that the vibration has reached a pre-measured vibration state,
The warp beam is reversed until it receives this signal, making the alignment process more automated.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

In FIG. 1, reference numeral 1 designates a warp beam, from which warp threads 2 are turned laterally by back rollers 3 and separated into upper threads and lower threads by heddles 5 to form an opening 6.

A weft thread is inserted into the opening 6 using a suitable weft insertion means, for example, a water jet nozzle 13, and the inserted weft thread is beaten against the cloth sill 4 by a reed 7 to weave a woven fabric 8.

This woven fabric 8 is guided downward by a presto beam 9, pulled by a weaving density adjusting device 10, and guided by a guide roller 1.
1 and wound around the cross beam 12.

The above is a normal loom.

In the present invention, a vibrator 14 is provided to engage the warp threads 2, and a receiver 15 is provided in contact with the woven fabric 8.

That is, as shown in FIGS. 2 and 4, a bracket 16 is provided inside the frame F of the loom protruding toward the warp threads 2, and shafts 17 and 18 are provided on this bracket 16 in parallel toward the warp line. Guide rollers 19 and 20 of a length capable of engaging several to dozens of warp threads 2 are rotatably supported at their tips.

A plate-shaped bracket 21 is provided between the shafts 17.18 and parallel to these shafts 17.18, and a vibrating body 14a such as an electromagnetic vibrator is fixed to the upper surface of the bracket 21.
A semicircular guide 22 is fixed to the vibrator 14a.

Then, dozens of warp threads at the edge of the 20 rows of warp threads are engaged with the lower surface of the guide roller 19, then engaged with the upper surface of the guide 22, and further engaged with the lower surface of the guide roller 20, and the number of warp threads described above is The ten warps 2 are made to lightly contact the vibrating body 14a.

On the other hand, the receiver 15a of the receiver 15 is engaged with the fabric 8 as shown in FIGS. 2 and 3.

Adjacent to the beat cutter 23, an L-shaped bracket 24 is fixed to the temple par 22 with a clamp 25 and a bolt 26.

A circular hole 24a is bored in the upper end of the bracket 24 parallel to the temple par 22, and a notch 24b is provided from the upper end to the circular hole 24a.A shaft 26 is inserted into the circular hole 24a and clamped with a bolt 27. .

One end of the clamping body 28 is fixed to this shaft 26, and this clamping body 2
The receiver 15a is fixed to the clamping portion 28a at the other end of the receiver 15a with a bolt 29 such that its tip is in contact with the woven fabric 8 including the several dozen warp threads 2 described above.

The receiver 15a converts the amplitude of the woven fabric into voltage fluctuations, and its output is connected to the input terminal of the amplifier circuit 31 via a filter 15b that passes only voltage fluctuations greater than a set value.

The output line of the amplifier circuit 31 is connected to a display device 3 such as a lamp.
Connect to 2.

On the other hand, the vibrating body 14a is a transmitting circuit 1 that excites the vibrating body 14a.
4b to constitute the vibrator 14.

The receiver 15 is composed of the above-mentioned transducer 15a and filter 15b.

Note that the transmission frequency of the transmission circuit 14b is preferably smaller than the natural frequency of the warp and woven fabric system.

In order to perform a matching operation using the apparatus of the present invention, the following preparatory operations are first performed.

First, a skilled person performs the stitching operation in advance, and when the stitching operation has been performed normally, the vibrator 14 and receiver 15 are activated to determine the vibration frequency of the woven fabric at that time (hereinafter referred to as the appropriate vibration frequency). Adjustment is made so that the filter 15b is activated when the receiver 15a senses it.

After completing this preparatory operation, if a matching operation becomes necessary, the matching operation is performed using the following procedure.

When performing the mouth-to-mouth alignment, the reed 7 is first manually positioned at the frontmost position.

Next, the clutch of the soap beam 1 is cut, and the weaving density adjusting device 10 and the cross beam 12 are rotated in the normal direction, thereby reliably separating the cloth loom 4 from the reed 7.

In this state, the vibrator 14 is operated. These exciters 14
After the receiver 15 operates normally, the clutch of the weaving density adjusting device 10 is released, the warp beam 1 is manually reversed, and the warp threads 2 are wound up.

After winding up the slack warp threads 2, the cross beam 12 slips the friction clutch and reverses direction, and the woven fabric moves toward the presto beam 9 side.

Until the fabric 4 comes into contact with the reed 7, there is only a slight tension in the warp-woven fabric system, so the vibration of the system due to the vibration of the vibrator 14a caused by the signal from the vibrator 14, that is, the transmitter circuit 14b, has a low frequency. It is.

When the warp beam 1 is further reversed, the woven fabric 4 comes into contact with the reed 7, and the woven fabric 4 is prevented from advancing by the reed 7.

Here, the woven fabric 4 is located at the normal position.

Further, as the warp beam 1 continues to reverse, the tension of the warp threads 2 increases, and the vibrations applied to the warp threads 2 increase as the tension of the warp threads 2 increases. Increase the number.

When the vibration frequency reaches the appropriate frequency, the filter 15b outputs an output signal, and the output signal is amplified by the amplifier circuit 31, and the display device 32 displays that the vibration frequency has reached the appropriate frequency.

At this time, the reverse rotation of the cross beam 12 is stopped and the cross beam 12
and the clutch of the fabric density adjustment device 10, and the vibration exciter 1
4. When the operation of the receiver 15 is stopped, the loom 4 is in the position of the reed 7, and the tension between the warp threads 2 and the woven fabric 8 is at the appropriate level, so that the matching operation is completed.

FIG. 5 shows an example in which the above-described embodiment is automated to further facilitate the matching operation.

The points different from the previous embodiment will be explained to Wang.

That is, the output side of the filter 15b is connected via an amplifier circuit 31 to a relay 33 having a normally closed contact 33a.

The output of the transmitting circuit 14 is connected to an amplifier circuit 34 and a relay 35 having a normally open contact 35a via a normally closed contact 33a.

A normally open contact 35a of the relay 35 is interposed in the electrical path between the warp beam reversing motor 36 and its power source 37.

Further, a gear 3B driven from the output shaft of the motor 36 is engaged with a gear 1a provided on the side of the warp beam 1.

The motor 36 may be equipped with a speed reduction mechanism, or the gear ratio of the gear 38 and the gear 1a may be adjusted so that the reversal speed of the warp beam 1 is in the order of 1 to 3 times per second at its circumferential speed. is good.

The action will be explained below.

Preparatory work is completed in the same manner as in the previous embodiment.

When the weaving process requires matching work, perform the following operations.

First, the reed 7 is manually positioned at the frontmost position, and then the clutch is operated to rotate the cross beam 12 in the forward direction to position the fabric front 4 closer to the prestroller 9 than the reed 7, and the vibrator 14 is activated.

In this state, as described in the previous embodiment, the signal from the receiver 15 is not input to the amplifier circuit 31.

In other words, the vibration frequency of the woven fabric is low and not at an appropriate vibration frequency.

Therefore, the relay 33 is not activated and the contact 33a is closed.

On the other hand, the signal from the transmitting circuit 14b is amplified by the amplifier circuit 34 and operates the relay 35 via the closed contact 33a.

Therefore, relay contact 35a is closed and motor 36 is connected to power source 37.

Therefore, the motor 36 rotates the warp beam 1 in the direction of the arrow A by rotating the gear 38, 1a.

Therefore, the warp threads 2 are wound around the warp beam 1, and the woven fabric 8 moves in the direction of the reed 7.

When the woven fabric 4 comes into contact with the reed 7, the progress of the woven fabric 8 is stopped by the reed 7.

In this state, strong tension is applied to the warp threads 2 for the first time, and the woven fabric 8
The frequency of vibration increases.

In this state, only low frequency signals are still being input to the filter 15b, so it is not output.

Further, when the warp beam 1 is reversed, the tension of the warp threads 2 increases and the frequency of the applied vibration also increases, and when this frequency reaches a proper frequency, the filter 15b outputs an output.

This output signal is amplified by an amplifier circuit 31 and operates a relay 33.

Therefore, the relay contact 33a opens and the relay 35 stops its operation.

Therefore, contact 35a is opened and motor 36 is stopped.

At this point, the operation of the vibrator 14 and receiver 15 is stopped, and each clutch is connected, thereby completing the matching operation.

In this state, the position of the woven fabric 4, the warp 2, and the tension of the woven fabric 8 are also in the same state as when an expert performs the matching work.

In the above-mentioned embodiment, the vibrator 14a was engaged with the warp threads 2, and the pendulum receiver 15a was engaged with the woven fabric, but this may be reversed.

In this way, in the warp and woven fabric system, the present invention provides a vibrator and a receiver for each of the warp and woven fabric, so not only the warp tension but also the tension in the woven fabric part can be reproduced in a normal mating state. It can be done.

Note that a clutch is provided between the warp beam 1 and the gear 1a, and the clutch is disengaged during weaving so that the reversing motor 36
Objects with large inertia, such as objects, may be prevented from rotating.

In this case, the clutch may be an electromagnetic clutch, and the electromagnetic clutch may be connected only when the relay 35 is activated.

Note that when the reed γ is at the most forward position (reed beating position), the warp shedding 6 is almost closed, and the clutch of the soap beam 1 is disengaged during the matching operation, so even if the warp beam 1 is rotated, the warp threads are not closed. There is no change in the closed state of the mouth.

Therefore, in this state, in the process of reversing the warp beam 1 and moving the woven fabric 4 toward the reed 7 (the woven fabric 4 does not touch the reed 7 yet), a nearly constant tension is generated in the warp 2, and the warp row and the woven fabric Almost a series of vibration systems are constructed.

In this case, the transmission frequency of the transmitter 14a is N, and the receiver 1
5a reception frequency (vibration frequency of the cloth) is n.

Then, n, f: const (constant).

When the woven fabric 4 comes into contact with the reed 7 through the above process, it is divided into two vibration systems, one consisting of the warp rows and the other consisting of the woven fabric, with the finishing plate as a boundary.

In this case, the reed blade is considered to be an elastic body.

Further, the vibration frequency N of the warp row at this time does not change thereafter because of forced vibration.

Then, the vibration frequency of the cloth becomes 02 from nl. Furthermore, in the process of reversing the warp beam 1 and increasing the warp tension, N
= const, and the vibration frequency of the cloth is n2 → n3
→ n4 → gradually becomes a dog.

That is, n2<n3<n, 4.

Furthermore, if the receiver 15a receives n3 when an expert performs proper calibration, then the filter 1
5b is set to transmit at this frequency n3.

In this way, from now on even an unskilled person can reproduce a proper alignment by stopping the reversal of the warp beam 1 when the n3 signal is output.

As mentioned above, it is convenient to use N=const, and for this purpose, the oscillation frequency of the oscillator 14a is set so that at least the above n3 is higher than the natural frequency N of the warp row. There is a need.

Since the method and device of the present invention are as described above, it is possible to automatically and accurately perform the fitting work of a loom, which conventionally required a lot of labor and effort. Not only does it have a remarkable effect on labor saving and improving efficiency in the industry, it also has an excellent effect on improving the quality of products.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the device of the present invention, FIG. 2 is a plan view thereof, FIGS. 3 and 4 are partial detailed views thereof, and FIG. 5 is a diagram of another embodiment of the device of the present invention. 1...warp beam, 2...warp, total...back roller, 4...--orimae, 5...
- Heddle, 6... Opening, 7... Reed, 8... Woven fabric, 9... Presto beam, 10...・Weaving density adjustment device, 11...
・Guide roller, 12...Cross beam, 13
...Water injection nozzle, 14...Vibrator,
15...Receiver, 31...Amplification circuit,
39...Display device.

Claims (1)

[Scope of Claims] 1. Holding the reed in the frontmost position, while vibrating the woven fabric and warp system at a constant cycle, receiving the vibration of the chain thread and reversing the warp beam, the frequency of the received vibration is A method for aligning a loom, characterized in that the reversal of the warp beam is stopped when the warp beam reaches a predetermined frequency. 2. Claim 1 characterized in that the system of the woven fabric and warp is vibrated by the warp between the back roller and the heald, and the vibration of the yarn between the reed and the pre-stroller is received. The loom fitting method described in Section 1. 3. A device that reverses the warp beam and presses the woven cloth against the reed to apply tension to the system of the woven fabric and warp threads, and then performs the mating process when this tension reaches an appropriate value, and the system is rotated at a certain period. a receiver that receives the vibration of the system and sends a signal at a predetermined frequency, a motor for reversing the warp beam, and a stop that stops the reversal of the warp beam upon receiving the signal. 1. A weaving device for a loom, characterized in that the reversing motor is stopped by detecting that the tension in the system has reached a proper value based on the signal.