JPH033588Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a winding amount control device for a multicolor freely exchangeable loom, and in particular to a motor that drives the weft length measuring and storage device, and a motor control circuit that controls the motor. related to technology for controlling connections.

Prior Art A multi-color freely exchangeable loom is provided with a length measuring storage device for each weft yarn, but if the driving source is a motor, it is necessary to control the winding amount.

A conventional winding amount control device 1 of this type was constructed as shown in FIG.

That is, the timing generator 3, which generates one pulse per revolution of the main shaft 2, supplies this pulse to the weft selection device 4. This weft selection device 4 receives control signals Sa, Sb, Sc, and Sd via a data line 6 to one input terminal of an AND gate array 5 consisting of AND gates 5a, 5b, 5c, and 5d.
are supplied to the main nozzle injection control device 8 via the data line 7, and control signals Sa′,
Supply Sb′, Sc′, and Sd′. Therefore, the main nozzle injection control device 8 supplies drive signals to the on-off valves 15a, 15b, 15c, and 15d via the data line 9.

On the other hand, the rotation of the spindle 2 is detected by a rotation detector 10 which operates in conjunction with the rotation and generates, for example, 60 pulses per rotation of the spindle 2, and the pulses are transmitted to the AND gates 5a, 5b, 5c, 5d.

The signals supplied from the AND gate array 5 are the motor control circuits 11a, 11b, 11c,
11d, and the motor control circuits 11a, 11
The output signals of b, 11c, and 11d are supplied to motor drive circuits 12a, 12b, 12c, and 12d,
Furthermore, motor drive circuits 12a, 12b, 12c,
The output signal of 12d is the motor 13a, 13b, 13
c and 13d, respectively.

In addition, each motor 13a, 13b, 13c, 13
The rotation amount of d is determined by, for example, an encoder (not shown) in the motor control circuits 11a, 11b, 11c,
11d.

The motors 13a, 13b, 13c, and 13d move each weft thread 14 by a rotating yarn guide (not shown).
a, 14b, 14c, 14d, for example, one pick each in the storage drums 17a, 17b, 17c, 17d.
to be stored. Here, the above motors 13a, 13
b, 13c, 13d and storage drums 17a, 17
b, 17c, and 17d constitute a length measurement storage device together with a rotating yarn guide and the like.

And the on-off valves 15a, 15b, 15c, 15
d according to a predetermined order,
Control signal output by the weft selection device 4
The weft threads 14a, 14b, 14c, 14d are opened and closed in sequence based on Sa', Sb', Sc', Sd', and the unwound weft threads 14a, 14b, 14c, 14d are fed through the weft insertion nozzles 16a, 16b, 16c, 16d.
is inserted into the opening of the warp threads together with the jet fluid. Of course, the unwinding of the weft yarns 14a, 14b, 14c, 14d in the stored state and the weft insertion nozzles 16a, 16b, 16c, 16d
The injection operation is performed in synchronization with the rotation of the loom based on the timing obtained by the timing generator 3.

In addition, the weft yarn selection device 4 supplies a control signal Sa to one input of the AND gate 5a in order to replenish the weft yarn 14a that has been subjected to the weft insertion operation. The pulse signal from the rotation detector 10, which is supplied to the other input of the motor control circuit 1, for a predetermined period of time is
1a. In addition, here motor control circuit 1
The number of pulses supplied to the motor 13a is determined by the number of pulses supplied to the motor 13a necessary for storing one pick of weft yarn 14a.
It is determined according to the amount of rotation. The configuration and operation of this motor control circuit 11a are disclosed in Japanese Patent Application No. 60-105588.
Details and examples are given in the issue.

Similar control is performed for the other weft yarns 14b, 14c, and 14d, and the winding amount control device 1 for a multicolor freely exchangeable loom that can use four types of weft yarns as a whole is configured.

Problems to be Solved by the Invention In the conventional device as shown in FIG. 1, one motor drive circuit 12a, 12b,
12c and 12d are required. However, since the horizontal insertion operation is performed only once per rotation of the spindle 2, the motor drive circuits 12a, 12b, 12
The operations of c and 12d are also performed sequentially in accordance with a predetermined weft insertion order. Therefore, while one motor drive circuit 12a is operating, other motor drive circuits 12b, 12c, 12d
is not working. Therefore, when considering the device as a whole, the circuit usage efficiency was poor.

Moreover, the motor drive circuits 12a, 12b, 12
The area occupied by the inverter (when using an induction motor), servo circuit, etc. that is actually used as c, 12d is so large that it cannot be ignored considering the installation area of the loom, and this places restrictions on the design of the loom or the location where the loom is installed. I'll give it away. of course,
They are installed according to the number of colors, so
It becomes expensive.

Purpose of the invention and means for solving the same The present invention has been made in view of the drawbacks of the prior art, and its purpose is to solve 1 or 2.
The above motor drive circuit is shared by a large number of length measurement storage devices.

Therefore, in the present invention, an appropriate motor drive circuit is selectively connected to one of the length measurement and storage devices based on a weft selection command from the weft selection device. Therefore, since the motor drive circuit is commonly used for a large number of motors, the number of installed motor drive circuits can be smaller than the number of length measurement storage devices, that is, the number of multicolors.

Embodiment 1 Hereinafter, the structure and operation of Embodiment 1 of the present invention will be specifically explained based on the drawings.

In addition, the same parts as the conventional example are represented by the same symbols,
The explanation will be omitted. Also, parts that are not important for explanation are not illustrated.

In this first embodiment, as shown in FIG. 2, one motor drive circuit 12a and each motor control circuit 11a,
11b, 11c, and 11d, a first signal selection device 18 is arranged to selectively supply one of the output signals to the motor drive circuit 12a. In addition, the motor drive circuit 12a and each motor 13a, 1
3b, 13c, and 13d, the output signal of the motor drive circuit 12a is selectively connected to one of the motors 1
A second signal selection device 19 is arranged to supply signals 3a, 13b, 13c, and 13d.

The first signal selection device 18 includes relay contacts _Ra1 , _Rb1 , _Rc1 ,
Rd ₁ is provided. Similarly, the second signal selection device 19 includes motors 13a, 13b, 13c,
Relay contact to turn on/off signal transmission to 13d
Ra ₁ , Rb ₁ , Rc ₁ , and Rd ₁ are provided. Relay contacts Ra ₁ , Rb ₁ , Rc ₁ , with the same symbols included in the first signal selection device 18 and the second signal selection device 19
Rd ₁ is a plurality of relays Ra, which are opened and closed simultaneously for each pair by selection signals Sa, Sb, Sc, and Sd supplied from the weft selection device 4, respectively.
It is composed of Rb, Rc, and Rd.

The operation of this embodiment will be explained. For example, motor 13
When storage is required in the length measurement storage device including a, the first and second storage devices are selected based on the selection signal Sa.
A pair of relay contacts in the signal selection device 18, 19 of
Ra ₁ is closed, and the other relay contacts Rb ₁ , Rc ₁ , Rd ₁ are
open. Therefore, only the output signal of the motor control circuit 11a is supplied to the motor drive circuit 12a, and the output signal of the motor drive circuit 12a is supplied to the motor 13.
Therefore, desired storage becomes possible.

Similarly, for other length measurement storage devices, selection signals Sb, Sc, and Sd are used to control motor control circuits 11b,
Based on the output signals of 11c and 11d, corresponding motors 13b, 13c, and 13d are driven, respectively.

That is, the motor drive circuit 12a selectively drives the motors 13a, 13b, 13c, and 13d in a time-sharing manner, and the weft selection device 4 also functions as a control device that selects the signal that passes through the motor drive circuit 12a. It's working.

In this embodiment, since the motor control circuits 11a, 11b, 11c, and 11d are specified by the AND condition, the first signal selection device 18 can be omitted. According to this omission, the AND gate array 5 is
This corresponds to the first signal selection device. However, the second signal selection device 19
This is essential for identifying 13b, 13c, and 13d.

Example 2 Next, regarding the second example, FIGS.
This will be explained based on the diagram.

This second embodiment is a further improvement of the winding amount control device 1 according to the first embodiment, and is superior in the following points.

That is, motors 13a, 13b, 13c, 13
Depending on the type of d and its drive timing, the motor continues to rotate due to inertia even after the selection signals Sa, Sb, Sc, and Sd disappear, and the necessary braking is not applied. this is,
Even though the motor drive circuit 12a has finished driving the motor 13a and is under deceleration control, the next selection signal Sb, for example, is generated.
This is because the driving of another motor 13b, for example, must be started, and therefore the original motor 13a will not be able to complete braking due to rotational inertia.
Since the so-called overrun amount of such a motor is not constant for each motor, as a result, the amount of weft yarns 14a, 14b, 14c, 14d stored in the storage drums 17a, 17b, 17c, 17d becomes non-uniform. It ends up.

On the other hand, in order to eliminate such inconveniences, it is conceivable to use a brake motor, but this actually poses a problem in response speed.

Therefore, in this second embodiment, two motor drive circuits 12a and 12b are used, and motors 13a and 13
When stopping the motors b, 13c, and 13d, sufficient deceleration control is possible.

That is, the first signal selection device 18 includes relay contacts Ra ₁ , Rb ₁ , Rc ₁ , Rd ₁ and relay contacts Ra ₂ ,
Rb ₂ , Rc ₂ , and Rd ₂ are provided, and their common connection points are connected to motor drive circuits 12a and 12b, respectively.
It is connected to the. In addition, the motor drive circuit 12b
The output of is supplied to one of the relay contacts Ra ₂ , Rb ₂ , Rc ₂ , Rd ₂ provided in the second signal selection device 19, and the output of the relay contact Ra ₂ , Rb ₂ , Rc ₂ , Rd ₂ is The other relay contacts Ra ₁ , Rb ₁ , Rc ₁ , Rd ₁ each have one end connected to the output of the motor drive circuit 12a.
motors 13a, 13b,
It supplies signals to 13c and 13d. That is, motor control circuits 11a, 11b, 11c, 1
1d and the motors 13a, 13b, 13c, and 13d, a connection can be selectively made to form a route including either the motor drive circuit 12a or the motor drive circuit 12b.

The control of each signal selection device 18, 19 is as follows.
The weft thread selection device 4 is operated by a pair of latches 20a, 20b for setting the condition.

Each latch 20a, 20b receives a selection signal Sa, Sb,
They are set alternately by Sc and Sd.
The selector switch 21 selectively supplies the selection signal supplied to the common terminal X to either terminal a or b. The switching operation is performed by a switching control circuit 22 such as a relay. The output signal of the switching control circuit 22 changes when the selection signals Sa, Sb, Sc, and Sd supplied from the weft selection device 4 are switched.

Next, the operation of this embodiment will be explained based on a more specific example with reference to the timing chart of FIG.

Here, four types of weft threads 14a, 14b, 14
The motors 13a, 14d are placed in the weft sequentially, and the motors 13a,
An example in which 13b, 13c, and 13d are also sequentially driven in accordance with this will be explained.

The weft selection device 4 generates a selection signal Sa in synchronization with the rotation of the main shaft 2. In response to the rising edge of this selection signal Sa, the switching control circuit 22 sends a switching signal to set the switching switch 21 to the contact a side.
Sx is set to "H" level, and therefore selection signals Sa, Sb, Sc, and Sd from the weft thread selection device 4 are supplied to the latch 20a via the changeover switch 21.

The latch 20a receives the obtained selection signals Sa, Sb,
Sc, Sd, only the selection control signal Sa ₁ is set at "H" level, and the other selection control signals Sb ₁ , Sb ₁ ,
Sc ₁ and Sd ₁ close only the relay contact Ra ₁ corresponding to the selected weft thread 14a to output "L" level.

Next, when the weft thread 14b is selected, the selection signal
Sa changes to "L" level, selection signal Sb becomes "H" level, and selection signals Sc and Sd maintain "L" level.

At this time, the switching control circuit 22 outputs the selection signal Sb
The rising edge of is detected, and the state of the switching signal Sx is inverted and set to "L" level. Therefore, the changeover switch 21 is switched to the contact b side, and the selection signals Sa, Sb, Sc, and Sd are supplied to the latch 20b side.

At this time, the latch 20a still maintains the state before the signal switching, so the selection control signal
Sa ₁ , Sb ₁ , Sc ₁ , and Sd ₁ are not reversed and maintain their previous states. Then, new selection signals Sa, Sb, Sc, and Sd are supplied to the latch 20b, so that the previous state is reset (released), and the selection control signal Sb ₂ is set to "H" level, and other selection control signals are Signals Sa ₂ , Sc ₂ , and Sd ₂ are set to "L" level.

Next, when the selection signal Sc is generated, based on the same operation, the latch 20a sets only the selection control signal Sc ₁ to "H" level, and the other selection control signals Sa ₁ , Sb ₁ , Sd ₁
becomes “L” level. Therefore, the selection signal
The state set when Sa occurs will be held until the selection signal Sc arrives at the latch 20a.

Upon generation of the selection signal Sd, a similar state change occurs in the latch 20b, and until that point the selection control signals Sa ₂ , Sb ₂ , Sc ₂ , Sd ₂ retain the state set at the generation of the selection signal Sb. ing.

Relay contacts Ra ₁ , Rb ₁ , Rc ₁ , Rd ₁ are opened and closed by selection control signals Sa ₁ , Sb ₁ , Sc ₁ , Sd _1, respectively, and relay contacts Ra ₂ , Rb ₂ , Rc ₂ , Rd ₂ are opened and closed by selection control signals Sa ₂ , Sb ₂ , Sc ₂ and Sd ₂ , respectively. That is, motors 13a, 13
b, 13c, and 13d are connected to corresponding motor control circuits 11a, 11b, 11c, and 11d, respectively, and motor drive circuit 12a and motor drive circuit 12b operate alternately.

Therefore, the motors 13a, 13b, 13c,
Focusing on the rotation of 13d, for example, when the selection signal Sa is generated, driving is started and the number of rotations increases, and when the selection signal Sa ends, the number of rotations decreases. At this time, since the motor 13a is at a high speed, it cannot be stopped suddenly, but the selection control signal Sa ₁ is changed by the action of the latch 20a, for example.
Since the "H" level is maintained, even after the selection signal Sa changes to "L" level, the motor drive circuit 1
The deceleration control signal 2a is supplied to the motor 13a as a signal for reducing the rotation and applying braking. Therefore, at high speeds, the rotation of the motor 13a is braked with sufficient margin, and overrun operation is eliminated, so that the above-mentioned problem does not occur. This deceleration signal changes from a certain frequency to a lower frequency in the case of the inverter-type motor drive circuits 12a, 12b, or acts as DC braking in the case of the servo-type motor drive circuits 12a, 12b. This braking method is determined by the type of motor.

In addition, motors 13a, 13b, 13c, 13d
The rotational speeds are shown as Ma, Mb, Mc, and Md, respectively, in the timing chart shown in FIG.

Modifications of the invention In the two embodiments described above, examples were shown in which one or two motor drive circuits were used, but as long as fewer motor drive circuits than the number of motors are used, various modifications may be made to the above embodiments. is possible.

Further, in the above embodiment, a relay is used as the signal selection device, but a non-contact switch such as a transistor or a triac may also be used depending on the level of the signal passing through.

Furthermore, although the embodiment has been described with respect to a four-color loom, the number of weft threads is not limited to this, and it goes without saying that the number of weft threads can be arbitrarily determined.

Effects of the invention According to the invention, since the motor drive circuit is shared by a plurality of motors, its usage efficiency is increased. Furthermore, by reducing the number of parts, it is possible to downsize the entire loom or reduce the installation space.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a winding amount control device in a conventional multicolor free exchange loom, and FIGS. 2 and 3 show essential parts of a winding amount control device in a multicolor free exchange loom according to the present invention. Block diagram, Figure 4 is the 3rd
FIG. 3 shows timing charts for the embodiments shown in the figures, respectively. 1... Winding amount control device, 2... Main shaft, 4... Weft selection device, 5a, 5b, 5c, 5d... AND
Gate, 11a, 11b, 11c, 11d...Motor control circuit, 12a, 12b, 12c, 12d
...Motor drive circuit, 13a, 13b, 13c,
13d...Motor, 14a, 14b, 14c, 1
4d... weft, 18... first signal selection device,
19...Second signal selection device, 20a, 20b...
... latch, 21 ... changeover switch, 22 ... changeover control circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of length measuring and storing devices that measure and store a plurality of weft threads by winding them around each other, a motor drive circuit that drives a motor included in the length measuring and storing device, and the above. a plurality of motor control circuits that control a motor drive circuit for each of the plurality of length measurement storage devices; a first signal selection device that selectively supplies output signals of the plurality of motor control circuits to the motor drive circuit; a second signal selection device that selectively supplies the output drive signal of the motor drive circuit to any of the motors included in the plurality of length measurement and storage devices, the first signal selection device and the second signal selection device; 1. A winding amount control device for a multi-color freely exchangeable loom, comprising: control means for determining a selection state of a selection device. (2) The winding amount control device for a polygonal free exchange loom according to claim 1, wherein the motor drive circuit is constituted by a single drive circuit. (3) The motor drive circuit has a pair of drive circuits, and even when one of the drive circuits is controlling the motor deceleration of the plurality of length measurement storage devices,
The winding amount control device for a multi-color freely exchangeable loom according to claim 1, wherein the other drive circuit is configured to be able to drive the motor of the other length measurement storage device. (4) The winding amount control device for a multi-color freely exchangeable loom according to claim 3, wherein the control means includes a pair of latch circuits that are alternatively selected. (5) Utility model registration claim 1, characterized in that the first and second signal selection devices are comprised of relays having a plurality of contacts that operate in conjunction with each other.
4. A winding amount control device for a multi-color freely exchangeable loom according to one of the items 1 to 4.