JPH0585867U - Roller draft device of spinning machine - Google Patents

Abstract

(57) [Summary] [Purpose] The material supply can be stopped independently for each weight, assembly and maintenance are simple, and the inspection cycle is extended. [Structure] The back bottom roller 7 of each weight is directly connected to an individual back bottom roller driving motor 6. The front bottom roller 2 and the middle bottom roller 3 are formed in common for all weights. A yarn breakage signal from a yarn breakage detection device provided for each weight is input to the driver. When the thread break signal is input to the driver, the driver immediately stops driving the back bottom roller driving motor 6 of the weight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drafting device for a spinning machine, and more particularly, to a roller drafting device in which all rollers other than a back roller arranged on the most upstream side of a raw material supply side are interlocked with each other.

[0002]

[Prior Art]

 Generally, in a spinning machine, a so-called roller draft type draft device is used in which two or more sets of rollers having different surface velocities are provided and the fiber bundles are successively thinned by utilizing the difference in the surface velocities. In a spinning machine equipped with multiple spindles such as a rough spinning machine or a fine spinning machine, the rollers of each spindle are driven by a roller shaft or line shaft common to all spindles. In the ring spinning machine, even when the yarn is broken, the fiber bundle (coarse yarn) is continuously supplied to the draft device without stopping, so that the worker sucks and removes it with the numerator until the yarn splicing is completed. Is becoming

If the pneumatic device is used to suck and remove the fiber bundle at all times even during yarn breakage, there is a problem that the raw material is lost and it is uneconomical. In addition, when the pneumatic device has a suction failure, there is a problem that the fiber bundle is wound around the rotating part or the yarn breaks in the adjacent weight. These problems become more significant as the spinning speed of the ring spinning machine increases.

In order to solve the above-mentioned problem, a draft device in which the upstream bottom roller before the second bottom roller can be stopped independently of other weights is proposed in Japanese Patent Laid-Open No. 51-149934. ing. In this device, as shown in FIG. 5, a second bottom roller 31 and a back bottom roller 32 are supported by bearings 33 and 34 for each weight, and both bottom rollers 31 and 32 are operatively connected via gears 35, 36 and 37. ing. Then, the rotation of the line shaft 38 common to all the weights is transmitted to the electromagnetic clutch 41 via the gears 39 and 40, and the bottom clutches 31 and 32 are driven and stopped by the demagnetization of the electromagnetic clutch 41. It is supposed to be. We also proposed a draft device that transmits the rotation of the front bottom roller shaft common to all weights to the back bottom roller via gears, electromagnetic clutches, etc., so that only the back bottom roller can be independently driven and stopped for each weight. Is being proposed.

[0005]

[Problems to be solved by the device]

 However, the back bottom roller can be driven for each weight, and the line shaft 38 common to all weights or the conventional device driven from the back bottom roller shaft via the gears and the electromagnetic clutch has a large number of parts. The work and maintenance work become troublesome. Also, if the line shaft and the back bottom roller shaft are not arranged completely parallel to the other bottom rollers, there is a problem that uneven rotation occurs between the weights and the product quality varies. Further, when an electromagnetic clutch is used, wear due to repeated turning on and off is likely to occur, and there is a problem that inspection must be performed in a relatively short cycle.

The present invention has been made in view of the above-mentioned problems, and the purpose thereof is to independently stop the supply of raw material for each weight, simplify the assembling and maintenance, and inspect the inspection cycle. (EN) Provided is a roller draft device for a spinning machine capable of lengthening the length.

[0007]

[Means for Solving the Problems]

 To achieve the above object, in the present invention, in a spinning machine having a large number of spindles, the back roller of the roller draft mechanism is configured to be driven for each spindle, and each backbottom roller is directly connected to an individual backbottom roller driving motor. A thread breakage detection device is provided for each weight, and a control unit that stops the drive of the back bottom roller drive motor of the weight based on a thread breakage signal from the thread breakage detection device is provided.

[0008]

[Action]

 The back rollers of the roller draft mechanism are driven by individual back bottom roller driving motors for each spindle. When a thread breakage occurs, a thread breakage detection signal is output from the thread breakage detection device of the weight, and based on the detection signal, the control unit outputs a stop command to the motor for driving the back bottom roller of the thread breakage weight. As a result, the back bottom roller of the weight is stopped, and the supply of the fiber bundle to the weight is stopped.

[0009]

【Example】

 (First Embodiment) A first embodiment embodying the present invention will be described below with reference to FIGS. As shown in FIG. 3, roller stands 1 are arranged on a roller beam (not shown) at predetermined intervals. A front bottom roller 2 and a middle bottom roller 3, which are common to all spindles, are rotatably supported on a roller stand 1 while extending along the longitudinal direction of the spinning machine stand. Both bottom rollers 2 and 3 are operatively connected at one end through a gear train 4 and are interlocked with the driving of a main motor 5. The middle bottom roller 3 is equipped with an apron 3a (shown in FIG. 1) for each weight.

Behind the middle bottom roller 3, an individual back bottom roller driving motor 6 is fixedly arranged for each weight via a bracket (not shown), and the back bottom roller 7 is connected to the back bottom roller driving motor 6. It is directly connected. A support rod 8 is fixed to the rear part of the roller stand 1 (upper part in FIG. 3) in parallel with the bottom roller. A weighting arm 12 that supports a front top roller 9, a middle apron 10 and a back top roller 11 is rotatably supported at the base end of the support rod 8. That is, the back roller is configured to be driven for each spindle, and the front roller and the middle roller are driven for all spindles simultaneously.

The main motor 5 is connected to the control device 13. Each back bottom roller driving motor 6 is connected to a control device 13 via a driver 14 as a control unit. The control device 13 outputs a speed command signal for rotating the back bottom roller 7 at a predetermined speed corresponding to the spinning condition to the driver 14, and the driver 14 outputs the back bottom at a speed corresponding to the speed command from the control device 13. The roller drive motor 6 is driven and controlled.

A thread breakage detection device 15 is provided for each weight, and an output signal thereof is input to the driver 14. The driver 14 stops the driving of the back bottom roller driving motor 6 when the yarn break signal is input, and restarts the back bottom roller driving motor 6 by the reset signal.

Next, the operation of the device configured as described above will be described. The main motor 5 and each back bottom roller driving motor 6 are driven by a control signal from the controller 13, and the fiber bundle is continuously supplied to each weight as the back roller rotates. A common speed command signal corresponding to the spinning conditions is output from the control device 13 to each driver 14, and each back bottom roller 7 is rotationally driven at the same speed. When the draft rate is changed, the back bottom roller 7 outputs a speed command signal, which is a rotation speed corresponding to the draft rate, from the control device 13, so that the draft rate can be easily changed. Therefore, unlike the conventional device, when changing the draft ratio, it is not necessary to replace the change gear for the back bottom roller.

When the yarn breakage detecting device 15 detects the yarn breakage, the detection signal is output to the driver 14 of the weight. When the driver 14 receives the yarn breakage detection signal, it immediately stops driving the back bottom roller drive motor 6. The back bottom roller 7 is immediately stopped when the driving of the back bottom roller driving motor 6 is stopped, and the supply of the raw material fiber bundle is stopped. Since the back bottom roller 7 is driven by the back bottom roller driving motor 6 for each weight individually, the back bottom rollers 7 other than the thread breaking weight continue to be driven and spinning is continued.

When the operator or the yarn splicing machine pushes the reset button to perform the yarn splicing work, a reset signal is input to the driver 14. Based on the reset signal, the driver 14 drives the back bottom roller driving motor 6 at the same speed as the back bottom roller driving motors 6 of the other weights. Then, as the back bottom roller 7 is driven, the supply of the fiber bundle is restarted.

Since each back bottom roller 7 is directly connected to the back bottom roller driving motor 6, the number of parts is larger than that of a conventional device driven from a line shaft common to all spindles through a gear train and an electromagnetic clutch. Is less. Therefore, the assembly work and the maintenance work are simplified. Further, since the position of the back bottom roller 7 can be adjusted individually, even if the parallelism of one weight with respect to the other bottom rollers slightly shifts, it does not affect the other weights. Also, when an electromagnetic clutch is used, wear is likely to occur due to repeated turning on and off, and it is necessary to inspect the electromagnetic clutch in a relatively short cycle, but this is eliminated by using an individual motor. ..

Second Embodiment Next, a second embodiment will be described with reference to FIG. This embodiment is different in that an outer rotor type motor having a fixed motor shaft and rotating on the frame (casing) side is used as the back bottom roller driving motor 16 similarly to a so-called pulley motor. The back bottom roller driving motor 16 is configured for two weights, and a motor shaft 18 is fixed to the support block 17 so as to penetrate the support block 17 and project symmetrically from both sides thereof. A coil 19 is wound around each motor shaft 18 protruding from the support block 17. A cylindrical casing 20 is rotatably supported by a motor shaft 18 via a bearing 21, and the casing 20 constitutes a back bottom roller 7. A rotor 22 is integrally rotatably attached to the inner surface of the casing 20 at a position corresponding to the coil 19.

In this embodiment, the support block 17 of the back bottom roller driving motor 16 is fixed at a predetermined position below the weighting arm 12, so that the back bottom rollers 7 for two weights are arranged at the predetermined position. Therefore, the labor of assembling is half that in the case of the above embodiment. In addition, since the fixed motor shaft 18 is common to the two spindles and is symmetrically arranged about the support block 17, the back bottom roller 7 is loaded from the back top roller 11 to the back bottom roller 7 in comparison with the case of the cantilever of the above embodiment. The parallelism is maintained with high accuracy even when is added.

It should be noted that the present invention is not limited to the above-described embodiment, and for example, when an outer rotor type motor is used, the motor shaft may be independently provided for each weight. Further, the front bottom roller and the middle bottom roller may not be operatively connected by a gear train but may be driven by separate motors.

[0020]

[Effect of the device]

 As described above in detail, according to the present invention, only the supply of the raw material to the weight can be reliably stopped when the yarn is broken, and the loss of the raw material and the winding of the raw material around the draft roller can be reliably prevented. In addition, assembly and maintenance are simplified and the inspection cycle can be extended.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an arrangement of bottom rollers.

FIG. 2 is a block circuit diagram showing an electrical configuration.

FIG. 3 is a schematic view of a draft device.

FIG. 4 is a partially cutaway front view of a back bottom roller driving motor of a second embodiment.

FIG. 5 is a schematic front view of a conventional device.

[Explanation of symbols]

6, 16 ... Back bottom roller drive motor, 7 ... Back bottom roller, 13 ... Control device, 14 ... Driver as control unit, 15 ... Thread breakage detection device.

Claims (1)

[Scope of utility model registration request] 1. In a spinning machine having a large number of spindles, a back roller of a roller draft mechanism is configured to be driven for each spindle, and each back bottom roller is directly connected to an individual back bottom roller drive motor, and each spindle is driven. A roller draft device for a spinning machine, which is provided with a yarn breakage detection device, and is provided with a control unit that stops driving of a back bottom roller driving motor of the weight based on a yarn breakage signal from the yarn breakage detection device.