JPH05295638A - Picking monitor in jet loom - Google Patents

Abstract

PURPOSE:To set the optimal yarn-picking conditions which seize the exact weft-flying properties by sending out an informations from a yarn feeder diameter detector and an angle range detector through the memory to the display and displaying the relation between the yarn feeder diameter and the angle range in a graph. CONSTITUTION:In an air-jet loom, the weft yarn sensor (WS) consisting of a light projector S1 and the receiver S2 is arranged so that the light crosses the balloon before the yarn feeder W1, and the output from the receiver S2 is connected to the yarn feeder diameter detector 11 equipped with the setter 11a for setting the picking length of the weft yarns W as each pick and the output is connected through the memory 13 to the display. Meanwhile, the output of a weft feeder WF is connected, through an angle range detector 12 connected to an encoder EN detecting the mechanical angle, to memory 13 and the display 14. The memory 13 memorizes the informations from both detectors 11 and 12, and simultaneously sends the informations to the display 14 to constitute the relation between the yarn feeder diameter used now or in the past and the angle range so that the relation can be displayed in graph.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion monitor device for a jet loom that can be effectively used when adjusting and setting weft insertion conditions such as weft insertion air pressure and weft insertion start angle.

[0002]

2. Description of the Related Art In an air jet loom, a weft is driven by an air jet to carry out weft insertion. Therefore, the air pressure for weft insertion and the weft insertion start angle (the timing for starting the weft insertion operation are set on the loom machine). The variable indicated by the angle
Hereinafter, weft insertion conditions such as (hereinafter, simply referred to as a start angle) must be optimally adjusted and set.

Since the flying characteristics of the weft in the air jet loom are generally determined by the magnitude of the air resistance of the weft against the air jet, they greatly vary depending on the yarn type and the unwinding resistance of the yarn feeder serving as the weft supply source. Is also greatly affected by. This is because the air resistance of the weft generates a driving force for conveying the weft in the weft insertion direction, and the unwinding resistance is a resistance against it. Incidentally, the unwinding resistance of the yarn feeder is generally large when the yarn feeder is new and has a large diameter, but becomes smaller as the yarn feeder is consumed and the yarn feeder becomes smaller in diameter. Is known to be. Also,
This situation applies to the water jet room as well as the air jet room.

[0004]

According to the prior art, adjustment and setting of the weft insertion condition of the jet loom is extremely complicated and requires a high degree of skill. As mentioned above, weft flight characteristics are as follows:
This is because it varies depending on the diameter of the yarn feeder, and it is not easy to appropriately determine these factors and to determine the weft inserting condition optimally.

In view of the above problems of the prior art, the object of the present invention is to determine the diameter of the yarn supplying body and the arrival angle (the timing at which the weft-inserted weft reaches a predetermined position on the side opposite to the weft insertion side of the woven fabric). By providing a display unit that displays the relationship between the variable indicated by the machine angle of the loom and the same below), the flying characteristics of the weft can be accurately grasped and used effectively for adjusting and setting the weft insertion conditions. It is to provide a weft insertion monitor device for a jet loom.

[0006]

The structure of the present invention for achieving the above object is to provide a yarn feeder diameter detecting portion for detecting the diameter of the yarn feeder for supplying the weft yarn, and an arrival angle of the weft yarn inserted. The gist of the present invention is to include an arrival angle detection unit for detecting the following, and a display unit that graphically displays the relationship between the diameter of the yarn supplying body from the yarn supply body diameter detecting unit and the arrival angle from the arrival angle detecting unit.

The display unit can display the relationship between the diameter of the yarn feeder and the arrival angle of the yarn feeder that is currently in use, and the yarn feeder that has been used in the past can be displayed. Relationships can be displayed.

[0008]

According to the structure of the present invention, since the display section can display the relationship between the diameter of the yarn feeder and the arrival angle of the weft inserted in a graph, the operator can perform the above-mentioned operation. By looking at the graph display that is made, the variation of the arrival angle when the consumption of the yarn feeder progresses is grasped, and the weft insertion air pressure and the start angle are adjusted so that the arrival angle maintains the optimum value. It is possible to appropriately adjust and set the weft inserting condition.

The display section indicates the yarn feeder currently in use.
When displaying the relationship between the diameter of the yarn feeder and the arrival angle, when the arrival angle tends to be delayed or accelerated in one direction, the worker should make sure that it does not exceed the allowable value. The weft inserting condition can be corrected.

When the display section displays the data of the yarn feeders that have been used in the past, the data of the yarn feeders of the same yarn type that have been used in the past can be referred to. It is possible to predict the running characteristic tendency, and it is possible to more accurately set the weft insertion condition.

[0011]

Embodiments Embodiments will be described below with reference to the drawings.

The weft insertion monitor of the jet loom comprises a yarn feeder diameter detecting section 11, an arrival angle detecting section 12, and a display section 1.
4 and (FIG. 1).

The weft yarn W is unwound from the yarn supplying body W1 and is temporarily wound around a drum type length measuring and storing device D via a yarn guide YG and stored. The stored weft threads W are weft-inserted into a warp opening (not shown) through a main nozzle N at a predetermined start angle, and are detected by a weft feeler WF at a predetermined position on the side opposite to the weft insertion side of the woven cloth. In addition,
The length measurement storage device D has a locking pin D1 and the locking pin D1
Is controlled by a weft insertion signal S1 from a timing controller (not shown) to start weft insertion of the weft W,
The length of the weft yarn W to be wefted can be restricted to a predetermined length. Further, the main nozzle N has a pressure adjusting valve PV,
Air from the air source AS is supplied via the on-off valve NV, and the pressure adjusting valve PV and the on-off valve NV are controlled by an adjusting signal S3 from a pressure controller (not shown) and a weft insertion signal S2 from a timing controller, respectively. Shall be done.

On the front surface of the yarn supplying body W1, a balloon is formed between the weft yarn W and the yarn guide YG when the weft yarn W is unwound. Therefore, in front of the yarn supplying body W1, a yarn sensor WS composed of a light projector WS1 and a light receiver WS2 is arranged so as to cross the balloon. The output of the light receiver WS2 is connected to the yarn feeder diameter detection unit 11, and the yarn feeder diameter detection unit 11 also detects the weft insertion length L of the weft W for each pick.
The setting device 11a which sets is attached. A weft insertion signal S1 is also input to the yarn feeder diameter detecting section 11.

The output of the yarn feeder diameter detecting section 11 is output to the memory 13
, And the output of the memory 13 is connected to the display unit 14. The output of the weft feeler WF is connected to the arrival angle detection unit 12, and the output of the arrival angle detection unit 12 is
It is connected to the memory 13. The arrival angle detector 1
An output of an encoder EN, which is connected to a main shaft of a loom (not shown) and detects the mechanical angle θ of the loom, is also connected to 2.

Now, at a predetermined start angle, the on-off valve N
When weft insertion signals S2 and S1 are applied to V and the locking pin D1, the on-off valve NV is opened, and the locking pin D1 releases the weft W wound and stored in the length measuring storage device D. The weft W can be inserted. At this time, the adjustment signal S3 is set in advance so that the air jet from the main nozzle N realizes an appropriate conveying force.
V, and weft insertion signal S1
In addition to the locking pin D1 at the starting angle, the weft insertion signal S2 is applied to the on-off valve NV slightly earlier than the weft insertion signal S1.

When the weft yarn W is unwound from the length measuring and storage device D by the amount corresponding to the predetermined weft insertion length L for each pick, the weft insertion signals S1 and S2 are stopped and the locking pin D1 is moved to its original position. To stop the weft insertion of the weft W and
The on-off valve NV is closed, and one weft insertion operation is completed. The weft insertion signal S2 may be stopped at a predetermined timing regardless of the weft insertion length L. In addition, the weft W inserted into the weft is detected by the weft feeler WF, and the arrival angle detection unit 12 can output the loom mechanical angle θ at that time as the arrival angle θe.

On the other hand, when the weft W is unwound from the length-measuring storage device D and weft insertion is performed in this manner, the length-measuring storage device D operates so as to supplement the reduction in the winding storage amount. .. That is, the length measuring and storing device D generally replenishes the weft insertion length L for one pick per one rotation of the loom and
Since the weft yarn W is unwound from the weft yarn W and transferred to the length measurement storage device D, at this time, the yarn sensor WS detects the balloon formed on the front surface of the yarn feeder W1 and outputs the unwinding signal S4. You can The unwinding signal S4 at this time is a pulse train generated every 1/2 turn of the weft W unwound from the yarn supplying body W1 (FIG. 2).

Therefore, the yarn feeder detecting section 11 releases the unwinding signal S for one cycle T of the weft insertion signal S1, that is, for each pick.
The number c of 4 pulses can be counted to calculate the diameter d of the yarn feeder W1. That is, πdc / 2 = L d = 2L / (πc), where L is the weft insertion length L for each pick set in the setting device 11a, and the diameter d is as shown in FIG.
When the taper cone package is as shown in, the effective diameter is shown. Further, when considering the traverse angle α of the weft yarn W in the yarn supplying body W1, it is sufficient to set d = 2L cos α / (πc).

The yarn feeder diameter detecting section 11 determines the diameter d of the yarn feeder W1 thus calculated for each pick or
After smoothing for a suitable number of consecutive picks,
It can be sent to the memory 13. So memory 1
3 is the diameter d of the yarn feeder W1 from the yarn feeder diameter detection unit 11,
While the arrival angle θe from the arrival angle detection unit 12 is stored in association with each other, these data can be sent to the display unit 14, so that the display unit 14 displays the data regarding the currently used yarn feeder W1. The relationship between the diameter d and the reaching angle θe can be sequentially displayed in a graph (solid line in FIG. 3). However, in the figure, dmax and dmin respectively represent the maximum value and the minimum value of the diameter d of the yarn supplying body W1.

In the above description, the weft insertion length L for each pick may be set by the setting device 11a or may be measured by an appropriate sensor. For example, if another unwinding sensor is provided in the vicinity of the front surface of the length measuring and storing device D, this unwinding sensor causes the front face of the length measuring and storing device D when the weft W is unwound from the length measuring and storing device D. Since it is possible to detect the balloon formed on the surface, it is possible to measure the weft insertion length L unwound from the length measurement storage device D by counting the unwind signal from the unwind sensor by an appropriate counter device. Is possible. Further, if a Doppler sensor for measuring the yarn speed of the weft yarn W to be inserted is provided on the front surface of the length measurement storage device D, the weft insertion length L can be measured by integrating the output thereof.

In the above description, the yarn feeder diameter detecting section 11
Can use any sensor as long as it can detect the diameter d of the yarn feeder W1. For example, if a camera device that takes an image of the end surface of the yarn feeder W1 from the axial direction of the yarn feeder W1 is used, the diameter d can be measured immediately, and a distance sensor that points the outer layer of the yarn feeder W1 can be used. It is also possible to use.

[0023]

[Other Embodiments] An arithmetic unit 15 can be attached to the memory 13 (FIG. 4). If the memory 13 stores and stores the correspondence data of the diameter d of each yarn feeder W1 and the reaching angle θe for a plurality of yarn feeders W1, W1 ... Reads these data from the memory 13 and calculates the average arrival angle θea = f (d)
Or its standard deviation σ = g (d) is calculated and stored in the memory 13
Can be sent back to. However, f and g are arbitrary functions.

Therefore, the display 14 graphically displays the relationship between the diameter d of the yarn supplying body W1 and the reaching angle θe of the yarn supplying body W1 currently in use (solid line in FIG. 3), and is also used in the past. The average arrival angle θea of the yarn feeders W1, W1 ...
(One-dot chain line in the figure) and its variation range θea ± 3σ
(Dashed line in the figure) can also be displayed. At this time, as the yarn feeders W1, W1 ... Used in the past, the same yarn type as that of the yarn feeder W1 currently in use should be selected, and one yarn feeder is used. When the data is stored only for the thread W1, the average arrival angle θea is simply the arrival angle θ for the yarn supply W1.
The variation range θea ± 3σ does not have to be displayed.

Generally, in the air jet loom, the timing controller and the pressure controller are
A feedback control system for controlling the start angle and the air pressure is configured so that the arrival angle θe is constant. For example, the timing controller TC is
The arrival angle deviation Δθe = θeo-θe is detected by comparing the reference arrival angle θeo and the arrival angle θe (FIG. 5), and the correction amount Δθ for the reference start angle θso is detected via the control amplifier TC1.
make. Therefore, an appropriate function generator TC2 for inputting the diameter d of the yarn feeder W1 is provided, and the feedforward control amount δθ is set.
= Ft (d), the start angle θs = θso + Δθ + δ
Since .theta. can be determined, thereafter, when .theta. =. theta.s, the weft insertion signal S1 can be generated via the control amplifier TC3.

The same applies to the pressure controller PC (FIG. 6). However, in the figure, the air pressure P is calculated as P = Po + ΔP + δP, and the feedforward control amount δP = fp (d) is a function of the diameter d.

When the arrival angle θe tends to increase or decrease the deviation δθe = θe−θea with respect to the standard average arrival angle θea (solid line in FIG. 3), the starting angle θs and the air pressure P
By performing the feed forward control, it is possible to realize more accurate weft insertion. However, it goes without saying that the present invention can be effectively applied not only to a loom having a timing controller and a pressure controller by feedback control but also to a loom not having them.

Further, the memory 13 and the display 14 can be integrated without being provided separately, and the display 14 can be mounted not only on each loom but also via a communication line. It can be commonly provided for a large number of looms connected to each other and used for centralized monitoring. Further, at this time, in one loom, the yarn supplying body W used in the past is used.
The data of 1 may be transferred to another loom and reused.

The present invention can be applied not only to the air jet loom but also to the water jet loom.

[0030]

As described above, according to the present invention, by providing the yarn feeder diameter detecting portion, the reaching angle detecting portion, and the display portion, the display portion is Since the relationship between the diameter of the yarn feeder and the arrival angle from the arrival angle detection unit can be displayed in a graph, the worker can monitor the display result and The excellent effect is that the change in the flight characteristics of the weft can be accurately grasped, and the weft inserting condition can be optimally set and adjusted.

[Brief description of drawings]

1 is an explanatory diagram of the overall configuration

[Fig. 2] Operation explanatory diagram

FIG. 3 is a diagram showing a display result.

FIG. 4 is a block diagram showing the main part of another embodiment.

FIG. 5 is a block diagram of the main part showing another embodiment (1)

FIG. 6 is a block diagram of a main part block showing another embodiment (2)

[Explanation of symbols]

 W ... Weft W1 ... Yarn feeder d ... Diameter θe ... Arrival angle 11 ... Yarn feeder diameter detection unit 12 ... Arrival angle detection unit 14 ... Display unit

Claims (3)

[Claims] 1. A yarn feeder diameter detecting unit for detecting a diameter of a yarn feeder for supplying a weft yarn, an arrival angle detecting unit for detecting an arrival angle of a weft yarn inserted into the weft, and the yarn feeder diameter detecting unit. A weft insertion monitor device for a jet loom, comprising a display unit for displaying the relationship between the diameter of the yarn feeder and the arrival angle from the arrival angle detection unit in a graph. 2. The weft insertion monitor device for a jet loom according to claim 1, wherein the display unit displays a relationship between a diameter of the yarn feeder and an arrival angle of the yarn feeder currently in use. .. 3. The jet room according to claim 1, wherein the display unit displays a relationship between a diameter of the yarn feeder and an arrival angle of the yarn feeder that has been used in the past. Weft insertion monitor device.