JPS59223323A - Drafting apparatus for spinning frame - Google Patents

Abstract

PURPOSE:To provide the titled apparatus capable of stopping the supply of fiber bundle in the case of end-breakage, by stopping the back bottom roller of the end breakage spindle according to the breakage signal, thereby reducing the loss of the raw material and preventing the winding of the yarn around the roller. CONSTITUTION:When the coil 31 is energized by the signal transmitted from an end-breakage detector or abnormality detector, a magnetic flux is formed between the field core 32 and the armature 28, and the armature 28 is attracted together with the transmission gears 24 toward the field core 32. The connection of the engaging clutch is released, and the protrusion 27 of the transmission gear 24 is intermeshed with the protrusion of the flange 26 to stop the transmission gear 24, back bottom roller shaft 15 and the back bottom roller 3, without fail. The fiber bundle is broken between the middle bottom roller 2 and the back bottom roller 3, and the supply of the yarn is stopped.

Description

[Detailed description of the invention] Technical field This invention relates to a draft device for a spinning machine.

In general, in spinning machines such as roving frames, spinning frames, and drawing machines, two or more sets of rollers with different surface speeds are installed, and the so-called roller draft is used to sequentially thin the fiber bundle by using the difference in surface speed. type draft devices are widely used. Furthermore, in roving frames and drawing machines, when the thread breaks, the entire machine is stopped and the thread splicing operation is performed, which is disadvantageous in that the rake efficiency of the machine becomes poor. Furthermore, in the drawing machine, when the machine is stopped, the entire machine must be stopped instantaneously, so there is a problem in that a large-capacity brake is required. On the other hand, in a ring spinning machine, the fiber bundle is continuously fed without stopping even when the thread breaks, and the fiber bundle is sucked up and discarded using a new machining mechanism until the operator completes the splicing. There is an inconvenience that there is a lot of loss of raw stone.

If the above-mentioned method of constantly supplying fiber bundles and suctioning and discarding them using new machining even during thread breakage is applied to high-speed spinning machines such as binding spinning machines, which have made remarkable progress in recent years, the loss of raw materials will be large, resulting in waste. In addition to being economical, there is a problem in that when the pneumatic suction fails, the fiber bundle gets wrapped around the rotating part, leading to accidents such as breakage. In order to solve the above-mentioned problems, in the equity ++ (5B-1210 publication) published on January 10, 1981, the back bottom roller can be stopped at every -C@spindle via a clutch, and when the thread breaks, A device has been proposed in which the clutch is disengaged to stop the bank roller and cut the fiber bundle of rough stone between the back roller and the next downstream roller.However, due to the importance of the clutch, the back roller is stopped. When stopping the drive of the bottom roller, even if the clutch is disengaged, the back bottom roller does not stop immediately; it rotates due to inertia, so the stopping time varies depending on the type of fiber. When performing splicing work, be sure to accurately and reliably stop the supply of fiber bundles.
Since it is necessary to perform this at a fixed timing, there will be a problem if the stopping time of the back bottom roller is not constant as described above. In addition, if the back roller rotates due to resistance to pulling out the fibers after the clutch is released, the fibers will be pulled out more and more (wrapped around the Freon h roller,
There is also the possibility that J3 could lead to an accident.

Purpose This invention was made in order to solve the above-mentioned problems of the conventional art.
It is possible to immediately stop the supply of fiber bundles to eliminate raw material loss and prevent accidents caused by winding the fiber bundles around rollers. Moreover, the operation of supplying and stopping the fiber bundles can be stopped for a specified period of time. Our goal is to provide a draft device for spinning machines that can reliably and timely cover.

Structure of the Invention In order to achieve the above-mentioned object, in the present invention, a back roller is arranged so as to be drivable for each spindle.

A drive gear is driven by meshing with a gear installed on the back 71ζ tom roller drive shaft, and a drive gear is rotatably supported coaxially with the drive gear and movable in the axial direction. A clutch mechanism is provided between a transmission gear that transmits rotation to a driven gear, and the transmission gear is provided with an engagement member that can engage with a fixed brake member disposed on the opposite side of the clutch mechanism. An electromagnet is provided which biases the transmission gear with a spring so that the clutch is connected, and disconnects the clutch when energized to attract and hold the transmission gear toward the brake member.

EXAMPLE Hereinafter, an example embodying the present invention will be described according to the drawings.
I'll explain. Trough] Hepart is Freon 1 ~ Bo 1 ~ M []
- roller 1, middle bottom roller 2 around which apron 2a is wound, back bottom roller 3, and each of the above-mentioned balls 1 to 1 [1-ra 1
, 2.3, the top roller 4-, and the middle top roller 5 around which the apron 5a is wound.
, a back roller 1 to a tube roller 6, and as shown in FIG. 2, the front bottom roller 1 and the middle bottom roller 2 are fixed to both ends of the front 1-bottom roller shaft 7 and the middle bottom roller shaft 8 as a set of two spindles. has been done.

Front bottom roller shaft 7 and middle bottom roller shaft 8
Gears 9 and 10 are fitted and fixed to the intermediate gears 13 and 13, respectively, which are driven by a front bottom roller drive shaft 11 and a middle bottom roller drive shaft 12, as shown in FIG.
14 so that it is constantly rotated.

As shown in FIG. 2.3, the back bottom roller shafts 15 are rotatably supported by the frame 17 via bearings 16, one spindle at a time.

A driven gear 18 is fixed to each back bottom roller shaft 15 so as to be rotatable therewith. A drive gear 21 that meshes with a gear 20 fitted on a back bottom roller drive shaft 19 common to all the spindles is rotatably supported by a shaft 22 in the center of the back rollers, which are composed of a set of two spindles. There is.

A large number of pawls 23 constituting a dog clutch are protruded from both sides of the drive gear 21. On both sides of the drive gear 21 are transmission gears 24 that transmit rotation to the driven gear 18.
is supported rotatably and movably in the axial direction.

A pawl 25 that meshes with a pawl 23 numbered on the drive gear is provided on one side of the transmission gear 24, and a pawl 25 with a pawl 26 as a brake member fixed to the frame 17 is provided on the other side. An engaging claw portion 27 is provided in a protruding manner. The transmission gear 24 is a support cylinder 2 into which an armature 28 is fitted and fixed.
A coil spring 30 interposed between the clutch 4a and the stopper 29 urges the pawls 23 and 25 of the dog clutch into a state of tight engagement. An electromagnet consisting of a field 32 with a built-in coil 31 is installed inside the molded 7-flange 26 in order to disconnect the clutch and attract and hold the transmission gear 24 to the pawl flange 26 side when energized. The coil 31 is energized based on a signal from a thread breakage detector or an abnormality detector.

Next, the operation of the apparatus constructed as described above will be explained. Normally, during spinning, the coil 31 is not energized, so the transmission gear 24 is biased toward the drive gear 21 and the clutch is held in a connected state, and rotated together with the drive gear 21, so that the back bottom The roller 3 is rotationally driven via a driven gear 18. When the coil 31 is energized by the detection signal from the thread breakage detector or abnormality detector, the field core 32
, a magnetic flux is generated between Noah-711728, and armature 2
8 is sucked and held on the field core 32 side together with the transmission gear 24. As a result, the dog clutch is disconnected, and the pawl portion 27 of the transmission gear 24 meshes with the pawl flange 26, causing the transmission gear 2. 4 will surely stop,
Back bottom roller shaft 15 and pack bottom 1 to roller 3
will also stop. After the back bottom roller 3 stops, the front bottom roller 1 and the middle bottom roller 2 continue to rotate, so when the back bottom roller 3 stops, the fiber bundle is transferred to the middle bottom roller 1 to the middle bottom roller 2 and the back bottom roller 3. When the coil 31 is de-energized, the magnetic flux disappears and the transmission gear 24 is moved toward the drive gear 21 by the spring force of the coil spring 30, and the claws 23 and 25 mesh with each other. The transmission gear 24 is rotated integrally with the drive gear 21, and the back bottom roller 3 is again rotationally driven via the driven gear 18.Since the clutch is held in the connected state by the spring force of the coil spring 30, normally Unlike electromagnetic clutches, electricity is not used to maintain the clutch connection, which helps reduce power consumption.Also, since the power transmission mechanism is a gear mechanism, there is no need to worry about how much gear grease gets in the clutch or brake mechanism. However, in the device of this embodiment, a dog clutch is used as the clutch mechanism, and the brake mechanism is also constituted by a combination of the 7 flange 26 with pawls and the pawl portion 27. Transmission of rotational force or cutting action can be performed without any trouble.

JJ, this invention is not limited to the above-mentioned embodiment, and for example, a leaf spring may be used instead of the coil spring 30, or the drive gear 21 may be provided on each spindle fυ instead of common to the two spindles. It is also possible to arbitrarily change the shape, structure, etc. of each part without departing from the spirit of the present invention, such as by configuring the front bottom roller 1 and the middle rollers 1 and 2 instead of two rollers.

[Effects] 2. According to the present invention, as described in detail, 1. When the yarn breaks, the back bottom roller with only the yarn breakage spindle is immediately and reliably stopped based on the yarn breakage signal, so the supply of fiber bundles is also stopped immediately, and even when used in high-speed spinning machines such as binding spinning machines, the raw material Not only is the loss reduced, but even if the pneumatic suction fails, the supply of the mi bundle can be immediately stopped, which prevents the fiber bundle from wrapping around the rotating part and causing major trouble. do not have. Also, by not only disengaging the clutch but also applying the brake,
Louis: Since the rotation of the back bottom roller is actually stopped, the back bottom roller does not rotate due to the pull-out resistance of 41 N (t), and the fiber bundle feeding and stopping operations are performed reliably in the specified patent, and the timing Settings are easy and thread splicing work can be easily performed using an automatic machine.

In addition, the clutch connected to the drive gear that is pulled during spinning is connected by a spring, and the electromagnet is energized only when the machine is stopped so that the clutch is released and the transmission gear is attracted and held on the brake side. This has the excellent effect of reducing power consumption as the clutch/brake mechanism becomes more compact.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment embodying the present invention, FIG. 2 is a partially cutaway plan view of the main part, and FIG. 3 is an enlarged sectional view of the main part. back bottom roller 1-m roller 3, back bottom roller shaft 15,
Driven gear 18, back bottom roller drive shaft 19, drive gear 21, pawls 23, 25 as a clutch mechanism, transmission gear 24, 7-lunge 26 with pawls as a brake member, pawl portion 27 as an engaging member, Coil spring 30,] Ile 31
, Field Core 32° Patent Applicant: Toyota Industries Corporation, Acting Representative
Person Patent Attorney On 1) Hironobu

Claims (1)

[Claims] 1. The back rollers (3, 6) are arranged so as to be drivable for each spindle, and the back rollers (3, 6) are provided on the back roller drive shaft (19). A gear (21) is rotatably supported coaxially with the drive gear (21) and movable in the axial direction, and transmits rotation to a driven gear (18) provided on the back bottom roller shaft (15). A clutch mechanism <23.25> is provided between the transmission gear (24), and the transmission gear is engaged with a fixed brake member (26) disposed on the opposite side of the clutch mechanism (23, 25). The matable engaging member (27) is a step (), and the transmission gear (24) is a spring ().
30) to connect the clutch 4"J' 9
j) At the same time, the clutch is disconnected when energized, and the transmission gear (24) is connected to the plate 42 member (26).
A draft device for a spinning machine, characterized in that an electromagnet (31°32) for suction and holding is provided on the ) side. 2. The back rollers (3, 6) are composed of a set of two spindles, and the drive gear (21) is arranged in the center, and clutch mechanisms (23° 25) are provided on both sides thereof. A spinning machine trough 1 to device according to claim 1, characterized in that: 3. The draft device for a spinning machine according to claim 1 or 2, wherein the clutch mechanism is a dog clutch, and the brake portion l and the engaging member are also flanges with claws.