JPS63145446A - Method and apparatus for driving planetary gear type selvage apparatus of shutteless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial field of application The invention according to this application is applicable to fluid jet looms and rapier looms.
The present invention relates to a method for driving a planetary gear type selvage device used for forming selvage tissue on a woven fabric in a shuttleless 11 machine such as the above.

In conventional shuttleless looms, the weft threads are cut according to the weaving width of the woven fabric every time the weft is inserted into the woven fabric.
It is necessary to form selvage structures at both ends of 5 to prevent the woven structure from fraying, and as a mechanism for this purpose,
Planetary gear type ear assembly devices are widely known (for example,
Utility Model Publication No. 43-18767). In this device, two planet gears are pivotally mounted on one sun gear, and each planet gear carries a selvage bobbin and a yarn guide, and the planet gears revolve by driving the sun gear. This realizes the shedding movement of the selvage threads unwound from each selvage thread bobbin, and also allows twisting of the selvage threads by the rotation of the planetary gear. In order to optimally set the direction and number of twists, a technique has also been proposed in which a change gear is inserted between the sun gear and the planetary gears as necessary (Japanese Patent Laid-Open No. 59-4743).
Publication No. 9).

This planetary gear type weaving device (hereinafter simply referred to as the selvage assembling device) can weft the weft inserted into the fabric being woven by the fji Ill, and the weft yarn supplied by the selvedge assembling device. Since the selvage tissue is formed by engaging and tightening the selvedge tissue, the selvage device must be driven in strict synchronization with the movement of the loom.
b. Conventionally, therefore, the only means for realizing such a synchronized relationship has been to mechanically connect the selvedge device and the loom.

Problems to be Solved by the Invention However, in the conventional technique, the shedding of the selvage yarn is due to the revolution of the planetary gear A2 by the sun gear, so the opening curve is determined by the loom being operated at a constant speed. As long as the waveform is fixed to a sinusoidal waveform in terms of time, it becomes difficult to secure sufficient opening margin for the weft insertion timing. The reality was that the problem of increased likelihood of stoppages was unavoidable.

Therefore, in view of the actual state of the prior art, the purpose of the invention of this application is to introduce a dedicated drive motor and an electrical control device instead of mechanically connecting the selvage device and the loom. By doing this, the selvage tying device can be driven at variable speeds according to a predetermined drive pattern while maintaining a synchronous relationship with the mechanical angle of the loom, so that the shedding curve of the selvage yarn is not fixed to a sinusoidal waveform. Therefore, it is an object of the present invention to provide a driving method and a device for a planetary gear type selvage assembly device for a shuttleless loom, which can easily realize a sufficient opening margin to prevent the occurrence of selvage thread catching, as needed. It is in.

Means for Solving the Problems The first invention according to the present application for achieving the object has two 'f planetary gears that are pivotally mounted on a sun gear and that rotate together with the sun gear. A selvage yarn bobbin and a yarn guide are respectively supported to form a selvage assembly device, and the sun gear is driven to perform the shedding motion of the selvage yarn, and engage the selvage yarn with the end of the weft yarn to form the selvage tissue. In forming the loom, the sun gear synchronizes with the mechanical angle of the loom,
While the gist of the invention is to perform variable speed drive according to a predetermined drive pattern, the configuration of the second invention according to this application includes: a drive motor that drives the selvage assembly device; an encoder that detects the mechanical angle of the loom; The main feature is that the control device receives a mechanical angle signal from an encoder and drives a drive motor at variable speeds according to a predetermined drive pattern synchronized with the mechanical angle of the loom.

According to the configuration of the first invention, the sun gear that determines the shedding curve of the selvage thread is synchronized with the mechanical angle of the loom, but is driven according to a predetermined variable speed drive pattern, so that the selvage thread The frontage curve is not simply fixed to a sinusoidal waveform, and the maximum opening state can be made sufficiently long from time to time so that the predetermined opening margin is 1q. The first aspect of the present invention can be carried out because the control device controls the drive motor for driving the selvage device at variable speed according to a predetermined drive pattern synchronized with the mechanical angle of the loom.

Example Examples will be described below with reference to the drawings.

The drive motor M of the selvage assembly device 1 is controlled by a control device 10 which does not indicate the mechanical angle θ of the loom and receives a mechanical angle signal S1 as input.
It is driven at variable speed according to a predetermined drive pattern synchronized with the mechanical angle θ of N (Fig. 1).

The ear assembly device 1 includes a sun gear 2 driven by a drive motor M, and two planetary gears 3a, 3 that are pivotally attached to the sun gear 2 and rotate around the sun due to the rotation of the sun gear 2.
b (FIG. 2), and each planetary gear 3a, 3b has a selvage bobbin (not shown) storing selvage threads a and b, respectively, and a selvage thread a to be unwound from the selvage thread bobbin. , b are supported. Now, when the sun gear 2 is driven by the drive motor M, the planetary gears 3a and 3b connected to the sun gear 2 either directly or through a suitable change gear revolve together with the sun gear A'2 and rotate on their own axis. Therefore, the selvage threads a and b are
It is capable of forming the selvedge tissue of weave I 5 by performing a shedding motion while engaging with the weft W ((△) in the same figure).
Naishikku E)).

However, here, the rotation of the sun gear A72 and the planetary gear 3a
, 3b have a rotation ratio of 1:1.

The control device 10 receives as input a mechanical angle signal 81 which is the output of an encoder EN connected to the main shaft S of the loom (first
figure). Here, as the encoder EN, for example, an angle sensor of the well-known Absoligo 1 type can be used, which can output the absolute value of the mechanical angle 0 of the loom in the form of an electrical signal.

The control device 10 includes a rotation amount command sieve 1 for inputting a mechanical angle signal S1, and a setting device 12 for inputting a predetermined drive pattern at 82 constants to the rotation amount command sieve 11. Roughly speaking, the output of the rotating foot command calculator 11 is input to the addition terminal UP of the target value counter 14, and the output is connected to the drive motor M via the control amplifier 15. On the other hand, the drive motor M has a speed generator T.
The output of the encoder ENI is fed back to the control amplifier 15, and the output of the encoder ENI connected to the drive motor M is fed back to the subtraction terminal DWN of the target value counter 14. . However, here, the target value counter 14 calculates the difference between each pulse train input to its addition terminal UP and subtraction terminal DWN, converts the result into an analog signal, and outputs it, and the encoder EN1 , [Fl A rotation amount signal 83 indicating the rotation angle ψ of the motor M as an absolute value is output.

Now, it is assumed that the setting device 12 can set the rotation angle ψ of the drive motor M with respect to the mechanical angle θ of the loom for the rotation ω command calculation 'a11.

That is, in FIG. 3, one period θ of the mechanical angle θ of the loom
Corresponding to O=360°, for example, θ=61=250
In the range from ' to θ-02=90', the rotation angle ψ of the drive motor M changes from ψ=O° to ψ=ψ1 =180° and from ψ=ψ1=180° to ψ=ψ2= 360”
It is assumed that the setter 12 can set data θ1.02, ψ1, and ψ2 so that they increase linearly, respectively. However, here, the mechanical angle 0 of n machines is
The intersecting timing of the selvedge yarns a and b is Oo, and the next intersecting timing is 360°, while the rotation amount ψ of the drive motor M is the mechanical angle of the loom 0. (7) The two-turn rule is the one-turn rule. shall be taken as a thing.

On the other hand, the rotation amount command calculator 11 reads the rotational angle R31 which is the output of the encoder EN, and when the current mechanical angle θ of the loom is θ1Sθ≦360°, O°≦0≦θ2, The required rotation nψO of the drive fh -E-'t M is calculated in accordance with the rate of increase in the mechanical angle θ of the loom at the time, and the pulse train signal S2 corresponding to the rotation is inputted to the addition terminal UP of the target value counter 14. . Here, the pulse rate of the pulse train signal NS2 corresponds to the rate of increase of the mechanical angle θ of the texture, and according to the setting with the setting device 12, the pulse rate is 0-θ2.
It is assumed that ψO=ψ1=ψ2−ψ1=180”.

The rotation amount signal @S3 of the drive motor M, which is the output of the encoder ENI connected to the drive motor M, is fed back to the subtraction terminal DWN of the target value counter 14, and the rotation amount signal S3 is the rotation amount of the drive motor M. Since it indicates ψ, the output of the direct counter 14 is
The required rotation amount ψO of the drive motor M calculated by,
It shows the difference from the actual rotation amount ψ, and therefore,
The drive motor M is driven based on the data θ1, θ2, ψ1, ψ2 set by the setting device 12, and follows the drive pattern calculated by the rotation amount command calculator 11. Furthermore, since the output signal MS4 of the speed generator TG indicates the speed V of the drive motor M, the control amplifier 15, the drive motor M, and the speed generator TG form a minor loop inside the control device 10 to drive the motor. The control characteristics of the motor M are improved.

In the above manner, the drive motor M is controlled so that θ1≦θ≦360
' , O°≦θ≦02, it rotates with a constant speed v1 from ψ=O° to ψ=ψ1=180', and roughly the next period of 01≦θ≦360', O'≦θ ≦02, the motor rotates from ψ=ψ1=180° to ψ=ψ2=360', while at θ2≦0≦θ1, it is operated according to a drive pattern in which it stops, and thereafter the same pattern is repeated (third figure). Therefore, the selvage threads a, b
stops at its fully open state at θ2≦θ≦θ1,
They can be made to intersect at θ1≦θ≦360' and O”≦0≦θ2 (curve showing the opening amount in the same figure)
, at this time, the shedding curves of the pY yarns a and b are not a simple sinusoidal waveform curve in terms of time, but can be a form in which the fully opened state is extended, so θ2≦θ≦01
The weft insertion operation of the weft yarn W may be performed at any timing between.

Note that the selvage assembly device 1 is generally arranged in one set on each side of the loom, and engages the selvage threads a and b unwound from each set with both ends of the weft W. The data θ1.02 set for the set is determined by considering the time required for the weft W to fly across the woven fabric and inserting the weft, and the data θ1.02 to be set on the weft supply side and the weft arrival side on the opposite side. The latter can also be installed later than the former. For example, on the weft supply side, θ1
= 250', 02 = 90', on the weft arrival side, θ1 = 350', θ2 = 190°
It is preferable to set the value to . In this case, of course, it is sufficient to share the encoder EN on the weft supply side and the weft arrival side, and to provide the control device 10 and subsequent parts corresponding to the respective selvage devices 1.

Other embodiments The drive pattern of the drive motor M, that is, the shedding curves of the selvage threads a and b, can be changed to any variable speed drive pattern other than that shown in FIG. 3 by changing the data set in the setting device 12. It can be realized.

For example, what is shown in FIG. 4 is θ2≦0≦03, θ4
It has a pause period at two places where ≦θ≦01,
For example, 01 = 200°, θ2 = 290°, 03 =
O°, θ4=90', ψ1 =90°, ψ2=180'
It is preferable to set ψ3=270' and ψ4=360'. According to this pattern, when 02≦θ≦03,
The selvage threads a and b are in a closed state and are merely sandwiching the weft thread W. Therefore, it is possible to take a long section where no selvage thread tension has been applied, so that the selvage threads a and b are not cut. You can reduce your chances of doing so.

The driving pattern shown in FIG. 5 is that the selvage threads a and b are driven at high speed v1 in the section where the selvage threads a and b shift from the open state to the closed state, and at the low speed v2 in the section where they shift from the closed state to the open state. , which drives the drive motor M, θ1 = 200', 02 = 290', θ3 = 4
It is preferable to set the angle to about 5°, 04=90°. Since the tension applied to the selvage threads a and b does not increase rapidly during opening, this is effective in reducing accidents of cutting the selvage threads a and b.

FIG. 6 shows that when θ1≦θ≦02, the drive motor M is
By driving with special high speed v3, the selvage thread a,
b are crossed twice, and one weft W can be twisted twice. Even if the selvage yarns a and b are slippery yarns, the weft W will be less strained and a strong selvage tissue can be obtained.

In FIG. 7, the drive motor M is not provided with a rest period, and the drive motor M is driven at a slow speed of v4.
Continuous operation including Since the drive motor M is not provided with a rest period, sudden changes in tension on the selvage threads a and b can be avoided.

Roughly speaking, in this invention, in addition to the various drive patterns exemplified above, as long as they are synchronized with the mechanical angle θ of the loom,
It is assumed that variable speed operation can be performed using any other drive pattern. For example, in FIG. 6, the two twists can be changed to r) twists (n≧3), and it goes without saying that a drive pattern that arbitrarily combines the above embodiments can also be used.

The control device 10 for the drive motor M may be a simple analog speed control system as long as the rotation amount ψ of the drive motor M and the mechanical angle O of the loom are kept consistent (FIG. 8). That is,
In place of the rotation open command calculator 11, a function generator 16 for generating the speed command signal 32a is provided, and a mechanical angle signal S1 is provided.
is read, and according to the mechanical angle θ of the loom at that time, the speed command value V to be given to the drive motor M is determined as v=f(0) according to the setting data given by the setting device 12, and this is inputted to the summing point 17 as the speed command signal 32a, compared with the output signal S4 of the speed generator TG, and inputted to the control amplifier 15 to determine the speed for controlling the drive motor M. It forms the control system.

At this time, the content of the function generator 16 is to generate a speed command signal S2a according to the speed curve of the drive motor M in each of the aforementioned drive patterns.

On the other hand, in FIG. 1, the drive motor M may be a pulse motor, the control amplifier 15 may be a pulse amplifier, and the speed generator TG may be omitted. At this time, it is assumed that the target value counter 14 can variably control both the number of pulse trains output to the pulse amplifier and the pulse rays 1 to 1 with the content J:. , both the rotation amount ψ and the speed V are controlled in accordance with the drive pattern given by the rotation 8 command calculator 11.

Further, when a pulse motor is used as the drive motor M, it is also possible to use FIG. 8 as the basis.

That is, the control amplifier 15 is replaced with a pulse amplifier with an A/D converter, the speed generator TG and the summing point 17 are deleted, and the speed command signal S2a is output from the pulse amplifier.
A motor M drives a pulse train with a number and pulse rate corresponding to
By feeding the pulse motor into the motor, an open loop control system using a pulse motor can be formed.

As described in detail, according to the first invention of this application,
By driving the sun gear of the selvage device, the frontage movement of the selvage yarn is performed to form the selvage tissue of the fli cloth.
The selvage setting device synchronizes with the mechanical angle of the loom and performs variable speed drive according to a predetermined drive pattern, so that the opening curve of the selvage thread is changed from a simple sine waveform to a longer full width state. Since it can be made into a form, it is possible to easily maintain the necessary and sufficient frontage
Therefore, J′3 that/of the occurrence of weft selvage catching:
This has an excellent effect in that it can be kept to a minimum and the operation rate of fA 8M can be improved. After that,
By appropriately setting the shape of the drive pattern, the influence of tension applied to the selvage yarn can be minimized, which reduces the chance of selvage yarn breakage, and roughly speaking, The practical effect is that it is easy to realize multiple twists.

Further, according to the second invention of this application, a drive motor for driving the selvage assembly device, an encoder for detecting the mechanical angle of the loom, and a mechanical angle of the loom using the fil +A angle signal from the encoder as input. By providing a control device that performs variable speed drive between upper and lower speeds according to a predetermined drive pattern synchronized with Since it is not mechanically interlocked with the selvage thread, it is easy to perform reverse control of the selvage device if necessary, and therefore the direction of rotation of the selvage device can be optimally set according to the twisting direction of the selvage yarn. There is also the practical effect of being able to

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment, Figure 1 is an overall electrical system diagram, Figure 2 (A> or [) is a schematic diagram explaining the operating order of the ear assembly device, and Figure 3 is a drive It is a pattern explanatory diagram. 4 to 7 are views corresponding to FIG. 3 showing other embodiments, respectively. FIG. 8 is a diagram corresponding to FIG. 1 roughly showing another embodiment. a, b...Selvage thread W...Weft thread 0...Machine angle of the loom M...Drive motor EN...
・Encoder Sl...Mechanical angle signal 1...F1 Star gear type ear assembly device 2...Sun gear 3a, 3b...Planetary gear A4a
, 4b... Yarn guide 10... Control device

Claims (1)

[Scope of Claims] 1) A planetary gear type selvedge in which two planetary gears, which are pivoted on a sun gear and rotate together with the sun gear, each carry a selvedge yarn bobbin and a yarn guide. Driving the sun gear of the assembling device causes an opening movement of the selvage thread unwound from the selvage thread bobbin, and engages the selvage thread with the end of the weft thread of the woven fabric to form a selvage tissue. A method for driving a planetary gear type selvage device for a shuttleless loom, characterized in that the planetary gear type selvage device performs variable speed drive according to a predetermined drive pattern in synchronization with the mechanical angle of the loom. 2) A drive for driving a planetary gear type selvage assembly device in which two planetary gears, which are pivoted on the sun gear and rotate together with the sun gear, each carry a selvage yarn bobbin and a yarn guide. A control device consisting of a motor, an encoder that detects the mechanical angle of the loom, and a control device that receives the mechanical angle signal from the encoder and drives the drive motor at variable speeds according to a predetermined drive pattern synchronized with the mechanical angle of the loom. A drive device for a planetary gear type selvedge device for a shuttle loom.