JPS5927413B2 - How to adjust warp tension in a loom - Google Patents

Description

Detailed Description of the Invention Technical Field This invention transmits the amount of oscillation of a tension roller that comes into contact with warp threads sent out from a warp beam and applies tension to the warp threads to a transmission provided in the drive system of the warp beam. The present invention relates to a warp tension adjustment method in a loom equipped with a warp delivery device that controls the warp delivery rotation speed of a warp beam.

Conventional technology If weaving flaws occur during weaving due to a weft insertion error, the loom is rotated in reverse to correct the weaving flaw area.
The weave is then re-woven from that part, but the warp tension fluctuates during this process of undoing the flaws, so after correcting the weaving flaws,
Prior to starting weaving, it is necessary to reverse only the warp beam, wind up the loosened warp threads, and make the tension of the warp threads the same as when the loom is stopped.

However, in the past, this work relied on the skill and skill of the operator, which was not only troublesome, time-consuming, but also difficult to obtain the same warp tension as when the loom was stopped.

For this reason, when weaving is resumed with the warp tension different from when the loom was stopped, the output of the transmission is different from before the loom stopped, and the warp delivery speed is changed, resulting in so-called thin film woven fabrics with different thicknesses. There was a problem that a thick film was formed.

Purpose of the Invention The purpose of the present invention is to provide a warp tension adjustment method that eliminates the above-mentioned conventional problems and allows the warp tension to be adjusted accurately without relying on the operator's skill or skill. .

EXAMPLE Below, a first example embodying this invention is shown in FIGS. 1 to 3.
This will be explained based on the diagram.

First, to explain the configuration of the warp delivery device, a warp beam shaft 2 is rotatably supported on a loom frame 1 of a loom, and a warp beam 3 is detachably attached to the warp beam shaft 2. ing.

A transmission 4 is arranged on one side of the machine frame 1, and power is transmitted to the input shaft 4a from a drive shaft (not shown) via a timing belt 5, and a transmission shaft 4b having a transmission lever 6. The rotational speed of the power is changed based on the rotational displacement of the power, and is output from the output shaft 4c, and is transmitted to the warp beam shaft 2 via spur gears 7, 8, bevel gears 9, 10, worm 11, worm and wheel 12. It is intended to be transmitted to

An electric or mechanical clutch (not shown) is provided between the warp beam shaft 2 and the output shaft 4c of the transmission 4, and the clutch is disengaged to connect and release the warp beam shaft 2. Bundle for independent rotation operation (
(not shown) is provided.

A back roller 13 is rotatably supported on the warp machine frame 1 at a position above the rear of the warp beam 3, and is configured to guide the warp Y sent out from the warp beam 3.

A tension lever 14 is swingably supported by a shaft 15 above the warp beam 3, and a tension roller 16 is rotatably supported at its rear end. The warp yarns Y that are sent upward are fed and guided through this tension roller 16 to the heald frame (not shown) side, and the entire tension lever 14 oscillates about the shaft 15 based on the tension fluctuation of the warp yarns Y. It is designed to move.

A swing lever 17 is swingably supported at one end by a shaft 18 on the machine frame 1 at a position below the tension lever 14, and a connecting rod 19 is connected between the base end thereof and the tip end of the tension lever 14. A spring 20 is interposed between the connecting rod 19 and the tension lever 14 to absorb the instantaneous large tension and impact applied to the warp yarns Y during beating or maximum opening. has been done.

A balance weight 21 is provided at the tip of the swing lever 1γ.
is suspended, and applies a constant tension to the warp yarns Y via a swing lever 17, a connecting rod 19, a spring 20, a tension lever 14, and a tension roller 16.

An actuating rod 22 is connected between the base end of the swing lever 170 and the speed change lever 6, and the swing of the swing lever 17 due to fluctuations in the tension of the warp yarns Y is transmitted to the speed change shaft 4b. The speed change shaft 4b is rotationally displaced in accordance with fluctuations in the amount of oscillation, and the speed ratio of the transmission 4 is changed based on this to change the rotational speed of the warp beam 3 to adapt to fluctuations in the tension of the warp Y. The optimum tension is always applied to Y.

A cylindrical electromagnet 23 having a coil inside is fixed to the tip of the swinging lever 17, and an iron is attached to the machine frame 1 so as to correspond to the movement area of the electromagnet 23 as the swinging lever 17 swings. The adsorption plate 24 made of a magnetic material such as
Fixed by

The electromagnet 23 is always in contact with the suction plate 24, and the electromagnet 23 is in contact with the suction plate 24 when a large instantaneous tension and impact is applied to the warp Y, such as when beating a reed, or when a weaving machine When the switch 29 shown in FIG. 3 is automatically closed in connection with the stopping operation, the switch 29 is connected to the power source E and is energized, so that the attraction plate 24 is attracted.

Further, when the electromagnet 23 is energized by closing the switch 29, it is demagnetized by opening a separate switch 30.

This switch 30 is normally closed.

A scale indicating rod 27 is attached at its lower end to approximately the middle part of the swing lever 17, and its upper end indicating portion 2γa corresponds to the scale plate 28 fixed to the machine frame 1, as shown in FIG. The swing position of the swing lever 17 due to tension fluctuations, that is, the gear ratio of the transmission 4, is indicated.

Now, during weaving, the warp beam 3 is rotated from the drive shaft via a gear mechanism such as a transmission 4 and spur gears 7 and 8, and the warp yarns Y are sent out.

As the warp yarns Y are fed out, the diameter of the warp beam 3 becomes smaller, the amount of feedout per unit rotation speed decreases, and the tension of the warp yarns Y gradually increases.

Therefore, the tension lever 14 is swung by the increased tension, the swiveling lever 17 is swung via the connecting rod 19, and the shift shaft 4b is rotated via the operating rod 22 and the shift lever 6.

As a result, the gear ratio of the transmission 4 is changed and the rotational speed of the warp beam 30 is corrected, so that the warp yarns Y are always fed out at the same speed, that is, with the same tension, so that uniform weaving can be achieved.

Further, the electromagnet 23 is normally in an inactive state, and at least when the loom stops, the switch 29 is turned on in connection with the stopping operation, attracts the suction plate 24, and the swing lever 17
is inactive, and even if the warp tension fluctuates while the loom is stopped, this will not be transmitted to the speed change lever 6, and the speed ratio of the transmission 4 can maintain the state when the loom is stopped.

Note that the operation of the electromagnet 23 can also be set during weaving, at the beating time or the maximum opening time, as necessary.

If a weaving flaw occurs due to a weft insertion error during weaving, the error detection device will stop the machine, and in conjunction with this stopping operation, the switch 29 will automatically close and the electromagnet 23 will be energized. , the swing lever 17 is braked so that it cannot swing, and the transmission 4 is locked so that it does not shift.

Next, while rotating the machine in the opposite direction and performing a shedding motion, the weft threads up to the weaving flaw position are removed (.

In this case, if the clutch interposed between the transmission 4 and the warp beam 3 is released, the warp beam 3 will not be reversed even if the machine is reversed (this will reduce the amount of slack in the warp threads). be able to.

After completing the repair in this way, move the scale indicator rod 2
The operator reads the scale 28a indicated by the indicator 27a of No. 7 and confirms the gear ratio of the transmission 4, which indicates the warp tension state when the loom is stopped.

Next, the switch 30 is opened to demagnetize the electromagnet 23,
The rocking lever 17 and the transmission 4 are unlocked.

In this way, since the tension of the warp yarns Y has been reduced by the above-described flaw recovery operation, both the tension lever 14 and the swing lever 17 are displaced, and the speed change lever 6 is displaced to a position different from that when the loom is stopped.

Therefore, by operating the handle with the clutch interposed between the transmission 4 and the warp beam shaft 2 disengaged and rotating only the warp beam 3 in the reverse direction, the warp yarn Y is wound and the tension of the warp yarn is increased. , and return the tension lever 14 and the swing lever 17 upward to move the scale indicating rod 2.
7. Align the indicator 27a with the previously confirmed scale 28a.

Therefore, the tension of the warp yarn Y and the gear ratio of the transmission 4 are set to the same state as when the loom is stopped, so in this state, the switch 30 is closed to apply braking, and the tension between the warp beam shaft 2 and the transmission is adjusted to the same state as when the loom is stopped. If weaving is restarted after the clutch is connected, it is possible to continue weaving with the same uniformity as the previously woven fabric.

In this way, the warp tension can be adjusted very easily and accurately without relying on the operator's skill or skill.

Next, a second embodiment of the present invention will be described based on FIG. 35 is supported, and a spring 36 is interposed between the levers 33 and 35 to absorb shocks, etc. during beating of the reed.

A brake lever 37 is rotatably supported by a shaft 65 near the swing lever 35, and a brake shoe 39 formed on the brake lever 37 corresponds to a brake shoe 38 formed on the swing lever 35 so as to be able to approach and separate. ing.

The brake lever 37 is biased by a spring 40 in a direction in which the brake lever 38 comes into contact with the brake shoe 39, and is rotated in a direction away from the brake lever 37 by a release cam 42 disposed corresponding to a cam follower 41 provided at the lower end. It has become.

This brake lever 37 is rotated in the braking direction when a large tension or impact is applied to the warp yarns Y, such as during beating, or when the machine is stopped.

The transmission 43 is configured as follows.

An eccentric wheel 45 is attached to the input shaft 44 connected to the drive shaft.
is fixed, and an operating rod 46 is attached to the outer periphery of the eccentric wheel 45.
A swinging wheel 47 having a diameter is slidably fitted therein.

An L-shaped operating lever 48 is swingably supported by a shaft 49 near the swing wheel 47, and one arm 4
The tip of the actuating rod 46 is fitted and fixed in an elongated hole 50 formed through the hole 8a so that its position can be adjusted.

Therefore, the swing ring 47 swings back and forth due to the eccentric rotation of the eccentric ring 45 based on the rotation of the input shaft 440, and the actuation lever 48 swings back and forth about the shaft 49 via the actuation rod 46.

A long hole 51 transparently provided in the other arm portion 48b of the actuation lever 48
One end of a drive lever 52 is fitted in the drive lever 52 so that its position can be adjusted, and is reciprocated by the swinging of the operating lever 48.

A feed pawl (not shown) is provided at the other end of the drive lever 52, and when the i-movement bar 52 reciprocates, it engages with and rotates a ratchet wheel (not shown), and based on this, the warp beam 53 is rotated in the warp delivery direction.

Note that an electrical or mechanical clutch (not shown) is interposed between the ratchet wheel and the support shaft of the warp beam 53, and by disengaging the clutch, the warp beam 53 can be rotated manually.

Therefore, the elongated hole mounting portion of the drive lever 52 and the operating lever 48
By changing the distance between the input shaft 440 and the shaft 49, the reciprocating stroke of the drive lever 52 can be changed to adjust the amount of rotation of the warp beam 530 of the input shaft 440 unit rotation.

The 1 drive lever 52 is closer to the fixed side and the swing lever 3
A connecting rod 54 is connected between the tip of a connecting lever 66 fixed to the tension lever 5, and the driving lever 52 is moved along the elongated hole 51 based on the swinging of the tension lever 33. 48 and the axis 49 is adapted to be changed.

The connecting rod 54 has its upper part extended upward to form a pointer 55 at its tip, and a scale plate 56 fixed to the machine frame.
It faces the scale 56a.

Therefore, the gear ratio based on the up and down position of the drive lever 52 can be confirmed with this scale 56a.

Next, to explain the mechanism for releasing the lock of the brake lever 37 from the tension lever 33, an operating lever 57 is supported by a shaft 58 on a part of the machine frame, and a bushing rod 59 is attached to the lower end of the operating lever 57. is attached, and the brake lever 37 can be rotated in the brake release direction by the bushing rod 59 based on the operation of the control lever 58.

The operating lever 57 is biased by a spring 60 in a direction in which the bushing rod 59 moves away from the brake lever 37.

This operating lever 57 has a pin 6 provided at its upper part.
1 engages with the regulation recess 63 of the regulation lever 62, and is elastically positioned at two positions, a brake release position and a brake permission position, by the action of the regulation recess 63 and the spring 640.

Now, when the tension of the warp yarn Y increases due to a change in the winding diameter of the warp beam 530 during weaving, the roller 31 side of the tension lever 33 moves down, so the connecting lever 66 and the connecting rod 54
The drive lever 52 is moved in the direction away from the shaft 49 of the actuation lever 48 through
The unwinding speed becomes faster and the warp tension is adjusted.

At this time, the change in the gear ratio is made at the scale 56 on the scale plate 56.
a and the pointer 55.

If a weaving flaw occurs, the cam 42 will move to the fourth position when the machine is stopped.
The brake lever 37 stops at the position shown in the figure, and the brake lever 37 brakes the swing lever 35 by the biasing force of the spring 40, thereby locking the transmission 43 so that it cannot shift.

Next, after reversing the machine and repairing the weaving flaws,
Check the scale 56a indicated by the pointer 55.

Then, the control lever 57 is rotated in the brake release direction to release the lock on the swing L/cover 5 and release the shift operation lock on the transmission 43.

In this way, the warp tension is reduced due to the flaw recovery, so the drive lever 52 moves downward within the through hole 51.

Therefore, the clutch interposed between the ratchet wheel and the warp beam 53 is removed and the warp beam 53 is manually operated.
3 in the opposite direction and rotate it in the warp winding direction to adjust the tension of the warp Y in accordance with the confirmed scale 56a, and depending on the warp tension, the tension lever 33, the swing lever 35, the connection lever 66, and the connection The drive lever 52 is moved upward via the rod 54, and the gear ratio is adjusted to be the same as when the loom is stopped.

All that is left to do is to return the operating lever 57 to its original position, brake the swing lever 35 with the brake lever 37, connect the clutch, and restart weaving.

Therefore, the same woven fabric as in the first embodiment can be obtained.

As exemplified in the above embodiments, the present invention allows the warp tension to be adjusted in accordance with the display on the display means before weaving is resumed, thereby relying on the skill and skill of the worker to adjust the warp tension during reweaving. (It is extremely easy and accurate to perform and produces excellent results.)

[Brief explanation of the drawing]

Fig. 1 is a front view showing a first embodiment of the invention, Fig. 2 is an enlarged front view showing the main parts, Fig. 3 is a circuit diagram of the electromagnet, and Fig. 4 is a second embodiment of the invention. FIG. Machine frame 1, warp beam 3, 53, transmission 4゜43, scale support rod 27, scale plate 28, 56, pointer 55゜

Claims (1)

[Claims] 1. In a warp sending device of a loom, a tension roller that contacts warp threads sent out from a warp beam is swingably provided, and fluctuations in warp thread tension are transmitted to a transmission by displacement of the tension roller to control the warp delivery speed. When stopped, the warp tension fluctuation transmission system from the tension roller to the transmission is braked to make it inactive, the loom is reversed to return the woven fabric to a predetermined position, and after confirming the display position of the transmission ratio, the warp Release the braking state of the tension fluctuation transmission system, then reverse the warp beam to wind the warp to the position where the gear ratio is displayed when the loom is stopped, and at that position brake the warp tension fluctuation transmission system again to make it inactive. A method for adjusting warp thread tension in a loom, characterized by: