JPS596927B2 - New automatic clearer device in spinning machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic clearer device in a spinning machine, and in particular, to an improved filter box so that a cage filter can be effectively used as a dust collector in a precision machine. .

In general, pneumatic clearer devices for spinning machines include those that have a fixed screen that acts as a dust collector, and those that have a rotating cage filter.

However, although the fixed screen simplifies the equipment because a part of the drive mechanism is omitted, the collected cotton dust has to be removed from the box again and again by hand, which is cumbersome.

On the other hand, in the case of a cage filter, it rotates while adsorbing and collecting cotton dust, and the delivery roller sequentially peels off the adsorbed cotton dust from the cage surface, so dust is collected and discharged automatically without the need for human intervention. Work can be done efficiently, but the drawback is that the equipment becomes more complex and power consumption increases.

By the way, Seibo machines have often used fixed screens,
The cage filter was hardly used.

However, in the case of this fixed screen, not only is the workability inferior due to the removal of the collected cotton dust as described above, but also the suction power weakens as the amount of cotton dust adsorbed to the screen increases, resulting in a reduction in the collection efficiency. In order to prevent a decrease in the amount of collected dust, excessive suction force must be applied, which has the drawback of increasing power consumption.

Therefore, it was considered that cage filters with better workability could be used instead of fixed screens in spinning machines, but in this case, cotton dust removal would be carried out automatically, and the air resistance of the suction air passing through the cage would be reduced. Although this reduces the required static pressure of the fan and saves the driving power cost, in this case as well, as in the case of a fixed screen, the floating fleece cotton generated due to thread breakage is passed through the flute nozzle into the cage. Since the work of collecting on the surface is added to the other cotton dust collection and discharge, it is necessary to rotate the fan that acts on the intake air to the cage filter as a power source and to continuously rotate the cage filter, and the power consumption is relatively low. It was inevitable that there would be more.

That is, conventionally, the fan of the filter box was rotated by a separate motor separate from the driving of the spinning machine main body so as to always generate the maximum suction force while the spinning machine was operating.

Therefore, a large amount of power is consumed, and since the continuous rotation of the cage filter by a separate drive motor is added to this, the power consumption of the pneumatic clearer device is high.

The present invention uses a cage filter in a dust collector while reducing power consumption, and also fully demonstrates its excellent workability, so that it can be particularly effectively applied to spinning machines.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below based on embodiments shown in the drawings.

In Figures 1 to 3, 1 is the front bottom roller, 2 is the flute, 3 is the duct, 4 is the fan box, and 5 is the front bottom roller.
is the motor for driving the fan 1, e.g., the pole number conversion motor; 6 is the fan; 7 is the partition plate; 8 is the cage filter; 8a is the cage; 9 is the drive motor for the cage filter 8 and the delivery roller 10; 11 is the exhaust Wind opening, 12 is tube thread, 12
' is a spun yarn, and the pneumatic clearer device of the present invention includes these flutes, ducts, fan boxes,
It consists of a cage filter, delivery roller, fan, pole number conversion motor, cage filter drive motor, etc.

First, the fan 6 acts on the cage filter 8 to take in air.
The zero configuration and its power consumption saving drive will be explained.

In order to reduce the power consumption of this fan, the present inventor first inserted and installed a pole number changing motor in the fan motor circuit for each spinning machine, and thereby changed the rotation speed of the motor at any time. 55-118060).

That is, a low-voltage three-phase squirrel cage induction motor with two speeds is used as the pole number changing motor 5, and the fan 6 is connected to the fan 6 so that its rotational speed can be switched between two stages, so that two types of strong and weak suction forces are applied to the flute 2.

That is, while the machine is in operation, the motor 5 is rotated at a low speed to apply the minimum suction force to the flute 2 necessary for normal operation.

And a thread breakage detection device (
(not shown) detects thread breakage, that signal causes motor 5 to
is switched to high speed, and a strong suction force is applied to the flute 2.

This will be explained using the motor control circuit shown in FIG. 4 as follows.

M1 is a pole number conversion motor for driving the fan, MS
1 is an electromagnetic relay for high-speed operation, MS2 is an electromagnetic relay for low-speed operation, MC is a motor terminal at high speed, electromagnetic relay for U1v1W1 connection, OC1 is an overload relay, FU fuse, P
B1 is a normally open push button switch for starting, PB2 is a normally closed push button switch for stopping, TD is a timer relay to set the time limit for high speed operation regardless of whether there is a thread breakage at startup, and TD2 is a switch from high speed to low speed. A timer relay that sets the time limit until the motor reaches a rotation speed close to the low speed due to inertia when switching, R, X, and Y are auxiliary relays, and A is a contact that closes when the thread breakage detection device detects thread breakage. When there is a thread breakage, it is closed, and when there is no thread breakage, it is open.

The control circuit for the pole number conversion motor shown in the drawing is in a stopped state, but when the push button switch PB1 is turned on in this state, the retrieval relay R is energized and the normally open contacts r1 and r2 are turned O.
The circuits of NL and auxiliary relay R are self-maintained, and the electromagnetic relay MC, timer relay TD, and electromagnetic relay MS
1 is excited.

When electromagnetic relays MC and MS1 are energized, normally open contacts mc.
, mS1 are turned on, and the motor M1 rotates at high speed.

When the timer relay TD1 reaches the time limit, the normally open contact td of the timer relay TD1 is ONL, and the second timer relay TD2 and the auxiliary relay Y are energized.

When auxiliary relay Y is energized, normally closed contacts y1 and y2 turn OFF.
L, electromagnetic relays MC, MS1 are demagnetized, contacts mc, ms
1 is OFF, the drive circuit of the motor M1 is cut off, and the motor M1 enters inertial rotation.

The inertia rotation time of this motor M1 is determined by timer relay TD2.
controlled by

That is, when the time elapses for the motor M1 to rotate at a low speed, the normally open contact td2 excites ONL and the electromagnetic relay MS2.

By energizing this electromagnetic relay MS2, the normally open contact rn S
2 is ONL, and motor M1 enters low speed rotation.

That is, the motor M1 continues to rotate at a low speed until a thread breakage or the like occurs and the contact A of the thread breakage detection device closes, and applies the minimum necessary suction force to the flute 2.

In this state, when the thread breakage detection device detects thread breakage and issues a signal, contact A turns ONL and energizes auxiliary relay X with this detection signal.

This operation of auxiliary relay X causes normally closed contact X to turn OFF and timer relay TD1 to be demagnetized.

And when this timer relay TD1 is demagnetized, the torture point td1 becomes O.
FFL, electromagnetic relay MS2, timer relay TD2, and auxiliary relay Y are demagnetized, and contacts td2 and ms2 are OFF.
, contact y1y2 is turned on.

Therefore, the drive circuit of the motor M1 is switched, the motor M1 starts rotating at high speed, and a strong suction force is applied to the flute 2.

Next, when the operator cancels the thread breakage state, that is, the abnormal operation state, the signal from the thread breakage detection device is interrupted and contact A is turned off.
f L, auxiliary relay X is demagnetized.

That is, contact X is ONL, timer relay TD1 is energized,
Thereafter, M1 enters low-speed rotation by the operation of each relay, etc. similar to that after the start of operation described above, and continues in this state until the next yarn breakage occurs, and applies the minimum necessary suction force to the flute 2.

As described above, the suction fan rotates at high and low speeds as needed in connection with the occurrence of thread breakage, thereby eliminating wasteful power consumption.

Next, a configuration for driving the cage filter 8 and the delivery roller 10 while reducing power consumption will be described.

As shown in FIGS. 1 to 3, the cage filter 8 and the delivery roller 10 consisting of a pair of pressure rollers are simultaneously driven by a drive motor 9 via a gear mechanism, a belt pulley, etc., and the cage 8a of the cage filter 8 is The fleece-like cotton and other cotton dust adsorbed and collected are peeled off by a delivery roller 10, gripped, led out of the fan box 4, and stored.

The cage filter 8 detects the pressure difference inside and outside the cage that occurs depending on the amount of cotton dust accumulated on the surface of the cage 8a of the cage filter 8, and rotates the cage filter 8 only when the amount of accumulated dust increases, so that there is no accumulation. The delivery roller 10 is rotated and stopped accordingly, and power is saved by intermittent driving of the delivery roller 10.

For this purpose, a differential pressure switch 13 is provided in the circuit of the drive motor 9 as shown in FIG. 3, and the drive motor 9 is rotated or stopped by detecting the pressure difference inside and outside the cage.

This will be explained with reference to the motor control circuit shown in FIG. 4 in accordance with the above-mentioned fan motor.

That is, the circuit of the drive motor is attached to the circuit of the motor for changing the number of poles of the fan, as shown by the encircling two-dot chain line in the drawing.

M2 is a drive motor for the cage filter and delivery roller; D. P. S is a differential pressure switch, MS3 is an electromagnetic relay for driving the motor, OC2 is an overload relay, and TD3 is a timer relay for setting the time limit for driving the drive motor.The intermittent rotation drive of the drive motor is performed as follows. It will be done.

First, the auxiliary relay R is energized by turning on the push button switch PB when driving the motor for changing the number of poles of the fan.

and differential pressure switch D. P. S is set to detect and operate when the pressure difference between the inside and outside of the cage filter reaches a predetermined value.

As a result, the cotton dust adsorbed to the cage accumulates, and when the pressure difference increases to a predetermined value, the differential pressure switch D. P. S is closed, and the electromagnetic relay MS3 and timer relay TD3 are energized due to the self-holding of the circuit accompanying this.

Accordingly, the contact ms3 turns ON and the motor M2 rotates.

When the time limit of timer relay TD3 is reached, normally closed contact td3 of TD3 goes OFF, electromagnetic relay MS3 is demagnetized, and contact mS3 goes OFF. , M2 are cut off, and motor M2 stops.

Also, when the pressure difference between the inside and outside of the cage becomes 0 or small, the differential pressure switch D. P. When S is opened, the first drive circuit is cut off and the motor M2 is stopped.

In this way, the motor rotates intermittently by opening and closing the differential pressure switch, thereby saving power for driving the cage filter.

Note that the activation time of timer relay TD3 is set considering the range in which the cage filter makes one rotation or the like, and the cotton dust is at the position where it is removed by the delivery roller, but in some cases this may be omitted. , it may be possible to rely only on a differential pressure switch.

Further, instead of this differential pressure switch, a timer may be used to rotate the cage filter intermittently.

As explained above, the present invention has a cage filter installed in the fan box that absorbs and collects cotton dust and discharges it to the outside of the machine. The minimum necessary suction force is applied to the cage filter during normal operation, and a strong suction force is applied when the thread breaks, and the cage filter is rotated or stopped by detecting the pressure difference between the inside and outside of the filter due to cotton dust absorbed on the cage surface. A rotating suction-type cage filter is provided to ensure cotton dust is absorbed and collected, and its discharge from the fan box is also smoothly carried out by a delivery roller attached to the cage filter. This automatic cotton dust collection and discharge can improve work efficiency.

In addition, according to the present invention, the suction force of the fan can be much smaller than that of conventional fixed screens by sequentially stripping off cotton dust using a rotating cage filter, and the power required to drive the fan can be saved. Since the fan is operated at a high speed when the yarn breaks by using a pole number changing motor, and is set at a low speed during normal operation for a long time, power consumption can be further reduced.

Furthermore, in the present invention, the cage filter is rotated and stopped intermittently depending on the pressure difference between the inside and outside of the cage depending on the amount of cotton dust absorbed.This also reduces the power consumption of the pneumatic clearer device as a whole. It becomes noticeably a dog.

The present invention is extremely effective when applied to information machines, and can improve dust collection efficiency and significantly reduce power consumption.

[Brief explanation of drawings]

1 to 3 show an example in which the device of the present invention is applied to a spinning frame, in which FIG. 1 is a plan view thereof, FIG. 2 is a front view, and FIG. 3 is a side view of the device of the present invention. FIG. 4 is a control circuit diagram of the pole number conversion motor that drives the device of the present invention, the cage filter, and the motor that drives the delivery roller. 4...Fun box, 5, M1...
Pole conversion motor, 6...Fan, 8...
- Cage filter, 8a... Cage (filter), 9, M2... Drive motor for cage filter and delivery roller.

Claims (1)

[Claims] 1. A fan that applies intake air to a cage filter that attracts and collects cotton dust, a fan drive motor that can be switched from low speed to high speed in response to a thread breakage detection signal, a drive motor that drives the cage filter and delivery roller, and a cage filter. A pneumatic clearer device for a spinning machine, comprising a differential pressure switch that detects a pressure difference between the inside and outside of the cage due to cotton dust adsorbed on the surface, and the cage filter is rotated or stopped by the differential pressure switch.