JPS6145184Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a speed controlling operation device for a cloth processing machine.

The finishing process of cloth consists of many unit processes such as washing, dyeing, drying, etc. These various unit processes can be carried out consecutively, or even when only the washing process is taken up, it can be carried out sequentially by lining up a large number of washing tanks. When washing continuously with water, for each unit process,
Or, since the degree of stretch of the cloth is different for each washing tank,
In order to eliminate looseness and excessive tension of the cloth due to the difference in the degree of expansion and contraction, speed regulating operation is performed.

An example of this speed regulating operation will be explained with respect to the water washer shown in FIG. A dancer roller 5 is provided above the cloth advancing side of the roller 4. The dancer roller 5 is attached to one end of a swing lever 7 having a support shaft 6 at the center, and a balance weight 8 is attached to the other end of the swing lever 7. The above-mentioned support shaft 6 is connected to a drive sprocket 12 of a displacement detector 11 via a chain sprocket 9 and an endless chain 10 fixed to the support shaft 6. The displacement detector 11 has a built-in synchronizer for detecting angular position, and when the drive sprocket 12 is fixed to the shaft of this synchro and a constant voltage power source is connected to its primary side (input end), the secondary A voltage proportional to the voltage on the primary side and the rotation angle of the synchronizer is generated on the next side (output end), and the secondary side of this displacement detector 11 is connected to the input end of the field adjuster 13. The output end thereof is connected to the field coil of the DC motor 2 for driving the cloth feed roller 3 in the next stage, so that the speed of the DC motor 2 in the next stage is changed according to the rotation angle of the support shaft 6. ing. On the other hand, the cloth F supplied to the nip between the cloth feed roller 3 and the presser roller 4 passes through the dancer roller 5, a large number of submerged guide rollers 14 and an upper guide roller 15 arranged in a staggered manner in the washing tank 1. The cloth is then sent to the cloth feed roller 3 of the washing tank 1 at the next stage. When the tension of the cloth F changes, the dancer roller 5 is displaced up and down, the drive sprocket 12 of the displacement detector 11 is rotated clockwise or counterclockwise, and the voltage of the current flowing through the field coil of the DC motor 2 is increased. Then, the speed of the next stage DC motor 2 is changed so that the cloth tension returns to the standard value.

However, the above-mentioned conventional speed regulating operation device for a fabric processing machine always applies a constant voltage to the primary side of the displacement detector 11 regardless of the speed of the fabric processing machine, that is, regardless of the speed of the fabric feed roller 3. Because I was
Both when the fabric treatment machine is operated at low speed and when it is operated at normal speed,
When the displacements of the dancer rollers 5 are equal, the gear ratio of the DC motor 2 (the ratio between the speed difference due to the shift and the speed before the shift) is equal, and the shift width (the speed difference before and after the shift) is extremely small in the case of low-speed operation. Therefore, when changing the type of fabric or processing conditions while operating the fabric processing machine at low speed, even if the dancer roller 5 is displaced, this displacement is not resolved and gradually increases, causing the fabric F to sag. There were disadvantages such as the cloth F being wrapped around the cloth feed roller 3, the tension of the cloth F being excessive, and the cloth processing machine being damaged.

This invention allows the speed change range of the DC motor 2 to be set larger during low-speed operation than during normal operation for the same displacement of the dancer roller 5, thereby making it possible to smoothly change the type or conditions during low-speed operation. It was made so that it could be done.

That is, in this invention, the displacement of the dancer roller is detected by a displacement detector equipped with a synchronizer for detecting the angular position, and the voltage applied to the field coil of the DC motor for driving the cloth feed roller is adjusted based on the detection signal. In the fabric processing machine in which the speed of the fabric feed roller is changed by using
A speed detection relay coil that operates when the speed of the DC motor is below or above a predetermined value is connected in parallel to the armature of the above DC motor, and when the speed of the DC motor is less than a predetermined value, the primary side of the displacement detector is set to high voltage. to the circuit,
The speed regulating operation device for a cloth processing machine is characterized in that when the speed is above a predetermined value, the primary sides are respectively connected to a low pressure circuit.

An embodiment of this invention will be described below with reference to FIGS. 2 and 3. However, the same parts as in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

In FIG. 2, 2a is a field coil of the DC motor 2, 2b is an armature, and the field coil 2a
The output side of the field adjuster 13 is connected to both ends of the field adjuster 13, and the secondary side of the displacement detector 11 is connected to the input side of the field adjuster 13, as in the conventional case. The primary side circuit of the displacement detector 11 is a grounding circuit 16 that is grounded.
It consists of a low voltage circuit 17 connected to a 110V power supply, and a high voltage circuit 18 branched from this low voltage circuit 17 and connected to a 220V power supply. Break contacts 19b are interposed as respective changeover switches. On the other hand, a relay coil 19 for speed detection is connected in parallel with the armature 2b. This relay coil 19 is connected to the above-mentioned make contact 19a.
Together with break contact 19b, it constitutes a relay, and when the input voltage exceeds a certain value, the contacts 19a and 19b are operated. Note that 20 is an armature power source.

In the above structure, a voltage proportional to the rotational speed is generated across the armature 2b, so when the cloth processing machine is started, the input voltage of the relay coil 19 gradually increases as the speed increases. .
Therefore, the break contact 19b of the high voltage circuit 18 remains closed until the speed of the cloth processing machine reaches a predetermined speed, and 220V is applied to the primary side of the displacement detector 11.
voltage is applied. When the speed of the cloth processing machine reaches a predetermined speed, the break contact 19
b opens, and at the same time the make contact 19 of the low voltage circuit 17
a is closed, the voltage applied to the primary side of the displacement detector 11 is switched from 220V for low-speed operation to 110V for high-speed operation, and the voltage applied to the field coil 2a of the DC motor 2 is accordingly reduced. The voltage applied to the field coil 2a of the DC motor 2, that is, the field voltage, is determined by the displacement of the dancer roller 5, that is, the synchronized rotation angle of the displacement detector 11, and the synchronized rotation angle of the displacement detector 1.
It is proportional to the primary voltage of 1. As shown in Fig. 3, when the horizontal axis represents the displacement of the dancer roller 5 and the vertical axis represents the field voltage, the field voltage will have a steep slope when the primary voltage of the displacement detector 11 is set to 220V. It is shown by a straight line 220, and the field voltage when the primary voltage is set to 110V is shown by a straight line 110 with a gentle slope. The range of change in the field voltage due to the displacement of the dancer roller 5 is indicated by the vertical distance between the horizontal line H indicating the standard of the field voltage and the above-mentioned inclined straight line 220 or 110, and the primary voltage of the displacement detector 11 is set to a high voltage. (220V), the change in the field voltage accompanying the displacement of the dancer roller 5 becomes larger than when the primary voltage is set to a low voltage (110V). That is, when the break contact 19b on the primary side of the displacement detector 11 is closed and low-speed operation is performed, the displacement of the dancer roller 5 is equal compared to when the make contact 19a is closed and high-speed operation is performed. However, when the speed change range of the DC motor 2 increases, the cloth processing machine shifts from low speed operation to high speed operation, the make contact 19a is closed and the primary voltage of the displacement detector 11 is switched to low voltage, the DC motor 2 The gear shift width is returned to normal. Moreover, since the relay coil 19 is provided as a speed detector and is interlocked with the make contact 19a and the break contact 19b, the primary voltage of the displacement detector 11 can be automatically switched in accordance with changes in cloth speed.

As explained above, in this invention, the primary voltage of the displacement detector of the dancer roller can be changed in two steps, high and low, so the primary voltage of the displacement detector during low-speed operation is set higher than during high-speed operation. Therefore, the speed change width of the DC motor for driving the cloth feed roller can be made larger during low-speed operation as compared to during high-speed operation due to the displacement of the dancer roller. Therefore, during start-up or low-speed operation due to lot change, the slack and excessive tension of the fabric caused by the insufficient speed change range of the DC motor for driving the fabric feed roller can be promptly corrected. This prevents damage to the cloth and cloth processing machine, allowing for smooth operation. Then, in the case of normal operating speed, by setting the primary voltage of the displacement detector to the same low voltage as before, the speed change width of the DC motor is returned to the same size as before, and the operation as before is resumed. can do.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional water washer, FIG. 2 is a circuit diagram of an embodiment of this invention, and FIG. 3 is a graph for explaining the operation. 2: DC motor, 2a: Field coil, 2b: Armature, 3: Cloth feed roller, 5: Dancer roller, 1
1: Displacement detector, 13: Field adjuster, 17: Low voltage circuit, 18: High voltage circuit, 19: Relay coil for speed detection.

Claims (1)

[Scope of utility model registration request] The displacement of the dancer roller is detected by a displacement detector equipped with a synchronizer for detecting the angular position, and the voltage applied to the field coil of the DC motor for driving the cloth feed roller is adjusted based on the detection signal to drive the cloth feed roller. In a cloth processing machine with variable speed, a high voltage circuit and a low voltage circuit that can be switched by a changeover switch are connected to the primary side of the displacement detector, and the armature of the DC motor is connected to the primary side of the displacement detector to detect whether the speed of the DC motor is below a predetermined value or above a predetermined value. Relay coils for speed detection that operate in parallel are connected in parallel, and when the speed of the DC motor is less than a predetermined value, the primary side of the displacement detector is connected to a high voltage circuit, and when the speed is above a predetermined value, the primary side is connected to a low voltage circuit. A speed regulating operation device for a cloth processing machine, characterized in that the respective speeds are connected to each other.