JPH0610231A - Back-up power source controller for weaving machines - Google Patents

Abstract

PURPOSE:To properly control the capacity of the back-up power source for the opening selector. CONSTITUTION:The opening selector is connected through a switch means 12 to the back-up power source 11 and a controller 13 is set for controlling the switch means 12. When the power source AC is lost, the switch means 12 is set on by the signal S1 of power off from the power off detector to connect the selector W to the back-up power source 11. The controller 13 breaks the switch means 12, after the idling rotation of the weaving machine completes, to remove the opening selector from the back-up power source 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup power supply control device for a loom which can minimize the capacity of a backup power supply attached to an electric shed selection device.

[0002]

2. Description of the Related Art Generally, an electronic dobby device and an electronic jacquard device (hereinafter, simply referred to as an opening selection device) are usually provided with a backup power source in case the power source of the loom is lost. These shed selection devices drive the heddle frame or heddle according to a predetermined warp shed pattern by an electric actuator such as a solenoid.Therefore, when the power is lost and the loom rotates with the electric actuator not operating, the warp shed pattern This is because continuity cannot be maintained and so-called misalignment occurs.

A power loss occurs due to an artificial power interruption in addition to a power failure. For the rotation of the loom when the power is lost, there is a case where the running loom is inertially rotated even after the power is lost. This includes a case where the loom that is stopped rotates in a direction in which the unbalance between the warp tension and the mechanical load such as the warp shedding device and the reed is eliminated (hereinafter referred to as balance rotation).

Further, in general, the shed selecting device is one type of loom.
During rotation, the electric actuator is operated at a predetermined timing (hereinafter referred to as selection timing), a predetermined heald frame or the like is connected to a drive mechanism, and the heald frame or the like is driven in accordance with the warp shedding pattern. When the loom passes the selection timing in the middle or in the balance rotation, all the heald frames and the like are uniformly reset to the selected state or the non-selected state, and the pattern shift occurs.
Therefore, if a backup power supply is attached to the aperture selection device, the electric actuator of the aperture selection device can operate during both inertial rotation and balance rotation, so that such an inconvenience can be effectively prevented. .

[0005]

According to the conventional technique, the backup power supply always supplies power to the aperture selection device when the power supply is lost, so that its capacity tends to be excessive and uneconomical. There was a problem that was. That is, the backup power supply is simply connected to the aperture selection device in parallel with the normal power supply, and the period for performing the backup operation for the aperture selection device has not been set.

In view of the problems of the prior art, the object of the present invention is to provide a harmful pattern by connecting the backup power source and the aperture selecting device through the opening / closing means and providing the control means for controlling the opening / closing means. It is an object of the present invention to provide a backup power supply control device for a loom that can appropriately suppress the capacity of the backup power supply without causing a deviation.

[0007]

The structure of the present invention for achieving the above object comprises a backup power supply, an opening / closing means for connecting the opening selection device to the backup power supply when the power is lost, and an opening at a predetermined time after the power is lost. The gist of the present invention is to include control means for controlling the opening / closing means so as to disconnect the selection device from the backup power supply.

A braking device is connected to the backup power source via the opening / closing means, and the control means opens / closes the opening selecting device and the braking device from the backup power source at a predetermined time after releasing the braking device. Can be controlled.

[0009]

According to the structure of the present invention, when the power supply is lost, the opening selection device is connected to the backup power supply through the opening / closing means, so that it is possible to prevent the pattern displacement due to the inertial rotation. On the other hand, the aperture selection device is disconnected from the backup power supply at a predetermined time after the power supply is lost, so that the backup power supply has a proper capacity. Here, the predetermined time is, for example, when a certain time has elapsed from the time of power loss, when the main shaft of the loom actually stops rotating after power loss, or if there is a fixed position stop function by the inching circuit, inching is performed. After the operation, the time when the main shaft reaches a fixed position and stops, etc. is referred to, and the loom can maintain the stopped state after these times. If the loom is actually stopped at the time of power loss, the opening selection device may be disconnected from the backup power source at the same time as the power loss without waiting for such a predetermined time.

When the braking device is also connected to the backup power supply, the control means controls the opening / closing means so as to disconnect both the opening selection device and the braking device from the backup power supply at a predetermined time after releasing the braking device. . Therefore, the shed selection device will be disconnected from the backup power source after the balance rotation occurs in the loom due to the release of the braking device, and the handle based on the balance rotation as well as the inertia rotation. It is also possible to prevent the risk of misalignment.

[0011]

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

The backup power supply control device of the loom comprises a backup power supply 11, an opening / closing means 12 and a control means 13 as main members (FIG. 1), and is different from the electric opening selection device W fed by the power supply AC. Even when the power supply AC is lost, the proper backup operation can be realized.

The backup power source 11 is connected to a power source AC, and the opening / closing means 12 is a backup power source 11.
And the aperture selection device W. In addition, the power supply AC includes a power failure detector 14 that detects a loss of the power supply AC.
Are connected. The output of the power failure detector 14 is branched and input to the opening / closing means 12 and the control means 13 as the power failure detection signal S1, and the output of the control means 13 is the confirmation signal S2.
Is input to the opening / closing means 12.

When the power supply AC is normal, the aperture selection device W is directly powered by the power supply AC. At this time, it is preferable that the backup power supply 11 be floatingly charged by the power supply AC.

When the power supply AC is lost, the power failure detector 14 is activated. That is, the power failure detector 14 generates the power failure detection signal S1 to make the opening / closing means 12 conductive, and connects the aperture selection device W to the backup power supply 11. Therefore, the aperture selection device W can maintain its function as it is. it can. That is, when the power supply AC is lost, the loom in operation shifts to inertial rotation, but the shedding selection device W can drive the heddle frame and the like according to a predetermined warp shed pattern even during inertial rotation, which is harmful. It does not cause a misalignment.

On the other hand, since the power failure detection signal S1 from the power failure detector 14 is also input to the control means 13, the control means 13 generates the confirmation signal S2 at a predetermined time after the power failure detection signal S1 is generated. can do. That is, the control means 13 controls the opening / closing means 1 at a predetermined time after the loss of the power supply AC.
A confirmation signal S2 is sent to the switch 2, the opening / closing means 12 is shut off, and the aperture selection device W can be disconnected from the backup power supply 11.

The control means 13 is, for example, the timer 1
3a (FIG. 2A). Here, the set time of the timer 13a is
The timer 13a generates a confirmation signal S2 after the power failure detection signal S1 is generated and then after the loom is completely stopped, provided that the time required for the running loom to stop is somewhat longer. Therefore, the aperture selection device W is supplied with power from the backup power supply 11 in all the periods during inertial rotation, and does not cause a pattern shift.

The control means 13 can also be constituted by a stop detector 13b for inputting the output of an encoder EN connected to the main shaft A of the loom (FIG. 2 (B)). The stop detector 13b detects that the spindle A has completely stopped after the power failure detection signal S1 is generated and generates the confirmation signal S2. During the period, power is supplied from the backup power supply 11 and can be disconnected from the backup power supply 11 by the confirmation signal S2.

Further, the control means 13 is a fixed position detector 13
Alternatively, a combination of c and the inching circuit 13d may be used ((C) in the figure). The inching circuit 13d uses the power failure detection signal S
When 1 occurs, after the loom stops, the main motor of the loom (not shown) is actively inching-controlled to drive the main shaft A to a fixed position. On the other hand, the fixed position detector 13c is
When the spindle A driven in this way reaches a fixed position, a confirmation signal S2 is generated and the aperture selection device W is disconnected from the backup power supply 11. It should be noted that the inching circuit 13d may operate a braking device (not shown) at a predetermined time to stop the main shaft A of the loom at a fixed position when the loom stops.

The confirmation signal S2 from the control means 13 is ANDed by the AND gate 15a between the stop signal St from the loom control circuit (not shown) and the power failure detection signal S1, and then the OR gate 15b. Alternatively, it may be sent to the opening / closing means 12 as the correction confirmation signal S2a (FIG. 3). When the loom is not in operation, the correction confirmation signal S2a is supplied to the power source A without waiting for the generation of the confirmation signal S2.
Occurred at the same time as the loss of C, the aperture selection device W can be disconnected from the backup power supply 11.

The overall operation described above can be represented by the flowchart of FIG. That is, when the power outage detector 14 detects the loss of the power supply AC (see FIG.
The program step (1), which will be simply referred to as (1)), makes the opening / closing means 12 conductive by the power failure detection signal S1 and connects the aperture selection device W to the backup power supply 11 (2). Then, when the control means 13 generates the confirmation signal S2, it can be confirmed that the loom has stopped (3). Therefore, the opening / closing means 12 may be shut off (4) and the opening selecting means W may be disconnected from the backup power supply 11.

In the above description, the control means 13 and a series of circuits such as the AND gates 15a, OR gates 15b and the like associated therewith are controlled by the backup power supply 11 or another backup power supply even after the power supply AC is lost. It goes without saying that the operation is maintained.

[0023]

[Other Embodiments] The backup power supply 11 includes an opening / closing means 1
The braking device B can also be connected via 2 (FIG. 5). The braking device B is also supplied with power from the power supply AC,
In addition to the power failure detection signal S1 from the power failure detector 14, a release signal S3 from the control means 13 is input to the braking device B.

When the power supply AC is lost (program step (1) in FIG. 6, hereinafter simply referred to as (1)), the power failure detection signal S1 from the power failure detector 14 causes the switching means 12 to conduct (2 ), Aperture selection device W, braking device B
Are connected to the backup power supply 11. At the same time, the braking device B is activated by the power failure detection signal S1 to stop the loom.

When the loom is stopped (3), the control means 13
Sends a release signal S3 to the braking device B to release the braking device B (4). Subsequently, the control means 13 confirms that the loom is stationary (5), shuts off the opening / closing means 12 (6), and disconnects the shed selection device W and the braking device B from the backup power supply 11. Here, the operation of confirming whether the loom is stopped or the loom is stationary by the control means 13 can be performed by either of FIGS. 2A and 2B, respectively. However, when confirming that the loom is stationary, the power failure detection signal S1 in FIGS. 2A and 2B should be read as the release signal S3.

When the braking device B is released after the loom is stopped, the loom may cause balance rotation, but even in such a case, since the shed selecting device W is powered by the backup power source 11, it is harmful. There is no risk of misalignment.

In FIG. 6, the braking device B may be operated only when the power source AC is lost and the loom is in operation (FIG. 7). However, the operation of FIG. 7 is equivalent to the case of using the correction confirmation signal S2a of FIG. 3 in place of the confirmation signal S2 of FIG. When the loom is not in operation, the correction confirmation signal S2a immediately shuts off the opening / closing means 12 and disconnects the shed selecting device W and the braking device B from the backup power source 11 to prevent the braking device B from being unnecessarily operated. Because you can

Further, the operation of confirming the loom stationary (program step (5) in FIG. 6) in FIG. 6 can be realized also in FIG. 2 (C). In addition, as the fixed position at this time, after the loom is rotated in balance, the spindle A should be stationary, or even if the loom is rotated in balance,
It is possible to select a position at which the aperture selection device W does not pass the selection timing. In addition, there is a model of the shed selection device W that causes a misalignment by rotating in the prohibition direction when the loom is in a specific forward rotation prohibition section or reverse rotation prohibition section, even if its power source is not lost. However, in such a case, it is preferable to select a position outside these prohibited sections as the fixed position.

[0029]

As described above, according to the present invention, the backup power supply, the opening / closing means, and the control means are provided, and the control means disconnects the aperture selection device from the backup power supply at a predetermined time after the power supply is lost. By controlling the opening / closing means in such a manner, the opening selection device is surely connected to the backup power supply during the inertia rotation that may cause a pattern shift, and the power can be supplied by the backup power supply. Since it is separated from the backup power supply, there is an excellent effect that the capacity of the backup power supply can be appropriately suppressed while effectively preventing harmful misalignment.

[Brief description of drawings]

[Figure 1] Overall configuration block diagram

[Fig. 2] Block diagram of main parts (1)

[Fig. 3] Block diagram of main parts (2)

[Fig. 4] Operation flowchart

FIG. 5 is a view corresponding to FIG. 1 showing another embodiment.

FIG. 6 is a view corresponding to FIG. 4 showing another embodiment.

FIG. 7 is a main part flowchart showing another embodiment.

[Explanation of symbols]

 AC ... Power supply W ... Opening selection device B ... Braking device 11 ... Backup power supply 12 ... Opening / closing means 13 ... Control means

Claims (2)

[Claims] 1. A backup power supply, opening / closing means for connecting the aperture selection device to the backup power supply when the power supply is lost, and controlling the opening / closing means so as to disconnect the opening selection device from the backup power supply at a predetermined time after the power supply is lost. A backup power supply control device for a loom, comprising a control means. 2. A braking device is connected to the backup power source via the opening / closing means, and the control means disconnects the opening selecting device and the braking device from the backup power source at a predetermined time after releasing the braking device. 2. The backup power supply control device for a loom according to claim 1, wherein the opening / closing means is controlled as described above.