JPH06346344A - Apparatus for winding woven cloth of loom - Google Patents

Abstract

PURPOSE:To enable the separate control of a winding shaft and the control of an automatic winding operation at a constant torque in the operating state as well as in the standing state of a loom. CONSTITUTION:A differential reduction gear 20 is placed in a transmission system between a roller 38a of a weaving density controlling apparatus 38 of a loom and a winding shaft 2 for a woven fabric 1. The output shaft 3 of the differential reducing gear 20 is detachably connected to the winding shaft 2 and the roller 38a is connected to the input shaft 21 via a sprocket 5 and a chain 4. The control shaft 24 of the differential reduction gear 20 is connected with a control motor 7 through a shaft coupling 6. The control motor 7 generates a constant brake torque independently of the rotational speed of the rotary shaft 7a. The rotational speed of the output shaft 3 is gradually decreased when the torque of the winding shaft increases above a preset torque by the gradual increase of the winding diameter of the winding shaft 2 during the operation of the loom. The rotational speed difference between the input shaft 21 and the output shaft 3 increases by this process to rotate the control shaft 24 against the brake torque of the control motor 7 according to the speed difference to enable the automatic winding control at a constant torque of the winding shaft 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven cloth winding device for a loom, and more particularly to a winding machine which can be controlled by a non-contact small capacity brake torque.

[0002]

2. Description of the Related Art Conventionally, as a woven cloth winding device, those disclosed in, for example, Japanese Utility Model Publication No. 51-23718 and Japanese Patent Publication No. 5-9532 are known. These are equipped with a friction clutch on the take-up shaft of the woven fabric and take up the woven fabric while slip control is performed by the friction clutch to control the increase in tension due to changes in the winding thickness of the woven fabric, or the woven fabric take-up outer diameter is mechanically adjusted. It detects it and feeds it back to the friction clutch and presses it. Further, recently, there is also a device in which a servo motor speed reducer is provided exclusively for the winding shaft and the winding control is performed while synchronizing with the loom.

[0003]

In the conventional woven cloth winding device, since the friction clutch is provided in the winding shaft transmission system and the winding is controlled by utilizing the slip, the friction clutch plate is worn. However, the control becomes unstable. Further, although an oil film is required for the friction clutch plate, the environment is bad, and it may be absorbed by cotton dust and the like to cause intermittent slip (stick slip). Further, since the device has a complicated structure, maintenance work is difficult. Further, in the servomotor speed reducer control device, electric noise is apt to enter the control system, a countermeasure is required, and the whole device is expensive.

[0004]

In order to achieve the above object, the present invention provides a differential reduction gear having three input / output shafts and a control shaft in a transmission system of a rotary drive unit of a loom and a winding shaft of a cloth. A differential reducer, the output shaft of the differential reducer and the winding shaft are detachably connected, and the input shaft of the differential reducer is connected to the rotary drive unit of the loom via a power transmission member. The control shaft of the differential speed reducer is connected to the rotary shaft of a control motor having a constant brake torque, and the control motor is connected to a control panel.

[0005]

The braking torque of the control motor is set to an appropriate value in advance. When the loom is started and enters the operating state, when the initial winding diameter is small, the rotational speed difference between the input shaft and the winding shaft of the differential speed reducer is small, so the rotational speed of the control motor is also low. When the winding diameter of the winding shaft gradually becomes thicker and torque is applied to exceed the set torque, the rotation speed of the winding shaft gradually decreases. As a result, the rotational speed difference between the output shaft and the input shaft of the differential reduction gear increases, and the control shaft rotates accordingly. Since the brake torque of the control motor generates a constant brake torque regardless of the rotation speed, automatic winding control with a constant winding shaft torque becomes possible.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 5, 31 is a warp beam of the loom, 32 is a warp yarn, 38 is a guide roll, 39 is an easing roll, 33 is a heddle, 34 is a weave, 37 is a cloth fell, 40 is a breast beam, 38 is a weaving density adjustment. apparatus,
Reference numeral 35 is a loom drive motor, 4 is a chain, 1 is a woven cloth, and 2 is a winding shaft. In FIG. 1, 9 is a frame of the loom, 10
Is a bearing housing fixed to the frame 9, on which the tubular portions 21a before and after the input shaft 21 of the differential speed reducer 20,
21b is rotatably supported.

The operating principle of the differential speed reducer 20 is as follows. When the control shaft 24 rotatably supported by the tubular portion 21b of the input shaft 21 makes one revolution, the eccentric roller bearing 25 engaged with the control shaft 24 also makes one revolution in the same direction. The wheel 23, which is in a rolling state with the eccentric roller bearing 25, meshes with the internal pin 22 in sequence while performing eccentric motion (revolution). Thus, when the input shaft 9 makes one rotation as shown in FIG. 2D, the wheel 23 deviates from the origin (FIG. 2A) by the difference in the number of teeth from the internal pin 22, and the wheel 23 rotates in the opposite direction to the control shaft 24. (Rotate).

That is, the wheel 23 revolves at a high speed and simultaneously rotates at a low speed. Then, this decelerated rotation (rotation of the foil 23) is transmitted by the carrier pin 26 and becomes rotation of the output shaft 3. The above operation is based on the input shaft 2
Although 1 is fixed, as shown in FIG. 1, when the input shaft 21 rotates, the output shaft 3 becomes a differential output of the rotation of the input shaft 21 and the control shaft 24. Therefore, by appropriately controlling the rotation of the control shaft 24, the rotation of the output shaft 3 can be controlled from zero to any rotation speed in the rotating state of the input shaft 21. In the above-mentioned differential reduction gear, for example, when the torque of the control shaft 24 is T, the torque of the output shaft 3 is TW, the reduction gear ratio of the differential reduction gear is R, and the efficiency is N, the following equation is established. T = TW · (R + 1) / 1 · N / 1 ………… (1) Further, the rotation speed of the control shaft 24 is different from the difference between the rotation of the input shaft 21 and the rotation of the output shaft 3. , (R + 1) / 1.

Reference numeral 7 denotes a control motor fixed to the frame 9. FIG. 4 shows a rotational speed-torque characteristic curve due to eddy current braking of the motor 7, and FIG. 3 shows a control circuit diagram. In FIG. 3, KM is a motor operating magnet, KF is a forward rotating magnet, KR is a reverse rotating magnet, KB is a brake operating magnet, and PBF is
Forward push button switch, PBR is reverse push button switch, PBM is motor start push button switch, PBO1 is motor OFF push button switch, P
BB is a push button switch for brake activation, PBO2
Is a brake OFF push button switch. As is clear from FIG. 4, the brake torque (eddy current) of the control motor 7 generates a constant brake torque regardless of the rotation speed of the rotary shaft 7a.

The rotary shaft 7a of the control motor 7 is connected to the control shaft 24 by a shaft coupling 6. The control motor 7 is connected to the control panel 30 via an electric wire 8. The control motor 7 is a high resistance type AC motor,
When a direct current is applied, an eddy current is generated and acts as a brake. A sprocket 5 is fixed to the tubular portion 21b of the input shaft 21, and an endless chain 4 is stretched between the sprocket 5 and the sprocket 38b fixed to the roller 38a of the weaving density adjusting device 38. There is.
The output shaft 3 of the differential speed reducer 20 includes the winding shaft 2
Is detachably connected.

Next, the operation of this embodiment will be described.
The brake torque of the control motor 7 is calculated based on the above formula 1, and the control panel 30 is operated to set it to an appropriate value in advance. Then, the starting operation of the loom is started. When the initial winding diameter of the woven cloth 1 of the winding shaft 2 is small, the rotational speed difference between the input shaft 21 of the differential speed reducer 20 and the winding shaft 2 is small, so the rotational speed of the control shaft 24 is also low. . The diameter of the woven cloth 1 wound around the winding shaft 2 gradually increases, and a torque is applied to the winding shaft 2. When this torque exceeds a set torque, the winding shaft 2, that is, the output shaft 3 The rotation speed gradually decreases. This means that the rotational speed difference between the input shaft 21 and the output shaft 3 increases, and as a result, the rotational speed 7a of the control motor 7, that is, the control shaft 24, becomes (R + 1) / 1 times the speed difference between them. Output in rotation.

Since the brake torque of the control motor 7, that is, the eddy current, produces a constant brake torque regardless of the rotation speed of the rotary shaft 7a, the torque on the winding shaft 2 becomes constant and the woven fabric 1 is wound. The tension can be kept almost constant to prevent winding wrinkles. Further, when the winding shaft 2 is independently controlled to rotate regardless of whether the loom is running or stopped, the control board 30 is operated to apply an alternating current to the control motor 7 so that the motor 7 functions as a speed change motor. The rotation of the winding shaft 2 can be controlled. When an AC voltage is applied to the control motor 7, the motor 7 outputs rotation proportional to the AC voltage, and variable speed control is possible. Therefore, when the fully wound woven fabric 1 is removed from the loom, this function can be used to stop the winding shaft 2 even during the loom operation, that is, even when the input shaft 21 is rotating.

When the loom is rotated in reverse for the purpose of repairing the woven damage on the woven cloth, the torque TW of the winding shaft 2 acts as a brake at that value, and the winding tension is maintained while the woven cloth tension is maintained. Axis 2 reverses. In the present embodiment, the differential reducer 20 having the structure shown in FIG. 2 is used. However, known differential reducers having various structures such as a structure having a differential mechanism using a planetary gear may be used. Can be used. Further, instead of the control motor 7, a variable torque type electromagnetic brake, a permanent magnet type brake, a mechanical brake, or a DC motor may be used.

[0014]

As described above, according to the present invention, since the differential speed reducer and the control motor are used in the transmission system of the woven cloth winding shaft, automatic winding control with a constant torque can be performed in synchronization with the loom speed.
Further, since the variable speed can be input from the control motor, the winding shaft can be independently controlled regardless of whether the loom is running or stopped. Further, since there are no wear or transmission torque instability elements such as a friction clutch, there is an effect that maintenance is unnecessary, the number of constituent parts is small, the mounting is easy and the cost is low.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an internal structure of a differential speed reducer.

FIG. 3 is a control board circuit diagram.

FIG. 4 is an eddy current braking torque characteristic diagram of a control motor.

FIG. 5 is a schematic view showing a weaving process of the loom.

[Explanation of symbols]

 1 Woven cloth 2 Winding shaft 3 Output shaft 4 Chain 5 Sprocket 6 Shaft joint 7 Control motor 8 Electric wire 9 Frame 10 Bearing housing 21 Input shaft 22 Internal pin 23 Wheel 24 Control shaft 26 Carrier pin

Claims (1)

[Claims] 1. A differential speed reducer having three axes, an input / output shaft and a control shaft, is provided in a transmission system of a rotary drive unit of a loom and a winding shaft of a cloth, and an output shaft of the differential speed reducer. And the take-up shaft are detachably connected, the input shaft of the differential speed reducer is connected to the rotary drive section of the loom via a power transmission member, and the control shaft of the differential speed reducer is brake torque. A woven fabric winding device for a loom, which is connected to a rotary shaft of a control motor having a certain characteristic, and the control motor is connected to a control board.