JPH0527057U - Draft device for long fiber spinning machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a simplified drafting device in which the drafting ratio between the rollers in the drafting device can be set easily, quickly and freely. [Structure] A draft roller mounted with an apron and a draft roller positioned upstream thereof are driven by the same motor at a constant speed ratio, and a draft roller mounted with the apron and downstream thereof are positioned. The draft roller is driven by a motor different from the above motor, and the rotation of each motor is controlled to change the draft ratio.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a draft device for a long fiber spinning machine.

[0002]

[Prior Art]

 In the long fiber spinning machine, it is necessary to change the draft ratio according to the spinning conditions. Therefore, in the past, this was dealt with by changing the gear ratio between the main motor and each draft roller. In the short fiber spinning machine, each roller is driven by a different motor.

However, these methods have the drawbacks that the apparatus becomes complicated and that the optimum draft ratio cannot be set easily and quickly.

[0004]

[Problems to be solved by the device]

 The present invention aims to obtain a draft device in which the draft ratio can be set easily, quickly and freely and is still simplified.

[0005]

[Means for Solving the Problems]

 A draft roller mounted with an apron and a draft roller positioned upstream thereof are driven by the same motor at a constant speed ratio, and a draft roller mounted with the apron and a draft roller positioned downstream thereof. Is configured to be driven by a motor different from the above motors and control the rotation of each motor to change the draft ratio.

[0006]

[Action]

 The draft ratio can be changed quickly and easily by controlling the rotation of each motor provided in the draft device.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings by taking a case of a five-wire type super high draft device of a spinning machine for long fibers such as wool as an example.

The draft device in this spinning device comprises a front roller 1, a second roller 2 having an apron band mounted thereon, a third roller 3, a force roller 4 having an apron band mounted thereon, and a back roller 5, which drive the front roller 1. The apparatus comprises a pulley 6 for the bottom roller 1a, a front roller driving pulley 7, idle pulleys 8 and 9 for maintaining belt tension, and an endless belt 10 wound around these pulleys.

The drive device for the second roller 2 and the third roller 3 includes a wheel 11, 12 attached to each bottom roller 2a, 3a thereof, a drive wheel 13, an idle wheel 14 for maintaining belt tension, and these. It consists of 15 endless belts that are stretched over.

The driving device for the force roller 4 and the back roller 5 includes wheels 16 and 17 attached to the bottom rollers 4a and 5a, a driving wheel 18, an idle wheel 19 for maintaining belt tension, and these wheels. It consists of 20 endless belts. Then, the power transmission to the draft device is performed by an endless toothed belt, that is, a timing belt, which is wound between the wheel fixed to each roller and the driving side wheel, and the front roller driving wheel 7, Each drive wheel 13 and 18 is directly driven by a separate motor 7M, 13M, 18M.

The third roller 3, the force roller 4, the back roller 5, and the idle wheels 14 and 19 are movable in the front-rear direction (direction of arrow AB in FIG. 1).

Further, as shown in FIG. 2, each of the top rollers 2b and 4b of the second roller 2 and the force roller 4 mounted with an apron band are provided with flange portions 21a and 21b at both ends. 22 is an apron band mounted on the top roller. In other words, the top rollers 2b and 4b are so-called hollow rollers, and the portion (the center portion in the width direction) of the apron band 22 that sandwiches the fiber bundle S is in a state of floating from the top rollers 2b and 4b. There is. Therefore, the fiber bundle S is nipped by the front roller 1, the third roller 3, and the back roller 5, and substantially between the back roller 5 and the third roller 3 and between the third roller 3 and the front roller 1. Each is to be drafted. Further, the apron bands 22 and 23 act as a guide for holding the fiber bundle S.

Reference numeral 23 is an air spinning nozzle for twisting the yarn delivered from the front roller 1, 24 is a delivery roller for delivering the yarn delivered from the air spinning nozzle 22, and includes a pulley 25, a delivery roller driving pulley 26, and these. A motor 26M is directly connected to the drive pulley 26 by an endless belt 27 that is stretched around.

In the present invention, therefore, in the draft device having the above-mentioned structure, the second roller 2 and the third roller 3 which are rotated by the drive pulley 13 are rotated by the motor 13M and the drive pulley 18 to rotate the force. The roller 4 and the back roller 5 are driven by a motor 18M at a predetermined constant speed ratio, for example, a ratio of 1.1 to 1.5: 1, and the motor M of the front roller 1 which is rotated by the drive pulley 7 and each of the above-mentioned motors are driven. The draft ratio is changed by changing the rotations of the motors 13M and 18M. Then, the draft ratio between the front roller 1 and the second roller 2 mounted with an apron band, and the draft ratio between the third roller 3 and the force roller 4 mounted with an apron band are changed to about 10: 1 respectively. It was confirmed that it could be transformed.

In the above embodiment, the five-wire type super high draft device is described as an example, but the force roller 4 and the back roller 5 are omitted, and the so-called three-wire type in which the third roller 3 is a back roller is used. Of course, it can be applied to a draft device.

[0016]

[Effect of the device]

 As described in detail above, in the draft device of the present invention, the draft roller mounted with the apron and the draft roller positioned on the upstream side are driven by the same motor at a constant speed ratio, and the apron is driven. Since the mounted draft roller and the draft roller located on the downstream side are driven by a motor different from the above-mentioned motor, the draft ratio is changed by controlling the rotation of each motor. By performing a simple operation such as controlling the rotation of each motor provided in the draft device, it is necessary to change the draft ratio by changing the gear between the main motor and each draft roller as in the past. Instead, the draft ratio could be set easily and quickly and freely, and the draft device could be simplified.

[Brief description of drawings]

FIG. 1 is a schematic side view of a draft device of a spinning device of the present invention.

FIG. 2 is a perspective view of a top roller on which an apron belt is mounted.

[Explanation of symbols]

 1 Front Roller 2 Second Roller 3 Third Roller 4 Force Roller 5 Back Roller 7,13,18 Drive Wheel 7M, 13M, 18M Motor 10,11,20 Endless Belt

Claims (1)

[Scope of utility model registration request] 1. A draft roller mounted with an apron,
The draft roller located on the upstream side is driven by the same motor at a constant speed ratio, and the draft roller mounted with the apron and the draft roller located on the downstream side are driven by a motor different from the motor. A draft device for a long fiber spinning machine configured to control the rotation of each motor and change the draft ratio.