JPH042826A - Apron-pressing device for drafting device in spinner - Google Patents

Abstract

PURPOSE:To apply nipping pressure to belts by attaching rollers made of a magnetic material on a rear face of an apron belt and providing every magnets on a rear face of the other apron belt and controlling each magnet with turning electricity on. CONSTITUTION:Rollers 12, 13, 14 and 15 made of a magnetic material are attached on a rear face of an apron belt 5 and magnets 19, 20, 21, 22 and 23 are provided on a rear face of an apron belt 9, then pole of each adjacent magnet is neighbored, thus the rollers 12, 13, 14 and 15 made of a magnetic material are located between adjacent poles.

Description

[Detailed description of the invention]

(Industrial Application Field 1) The object of the present invention is to obtain a contact pressure device for an apron belt that is hung on a middle roller of a draft device used in a spinning machine.

[Means for Solving the Problems] In order to solve the above-mentioned drawbacks of the conventional ones, the present invention provides fiber bundles between the top apron belt of the top middle roller and the bottom apron belt of the bottom middle roller. In an apron contacting device for a spinning tram that drafts an aH bundle between a pair of middle rollers and a pair of front rollers, a plurality of O-rollers made of a magnetic material are brought into contact with the back surface of one apron belt, and the other side facing each other is used. A plurality of magnets were arranged on the back side of the apron belt facing the roller, and by controlling the energization of each magnet, nip pressure was applied to the belt, thereby obtaining the optimal Nitsubuka curve according to the fiber bundle. . 1 Effect] By changing the magnet and current to be energized according to the fiber length of the SH bundle to be spun, and by changing the roller that presses against the belt and the pressing force, the tension between the front roller and the middle roller is reduced. In general, it is desirable that the fiber length be slightly shorter than the distance between the middle roller and the front roller. However, the fiber lengths are not necessarily uniform, and if the fiber lengths are considerably short, the nip force exerted between the front roller and the middle roller will be reduced. In this way, even if the floating man is not pinched between the front roller and the middle roller, it is desirable that it be pinched by the nipping force between the upper apron belt and the bottom apron belt. However, the lengths of the fiber bundles that make up the actual S-shaped fibers vary considerably, and as a result, the nipping force that each fiber receives is not uniform, causing draft unevenness. In response to this, various types of draft devices are prepared depending on the type of IIA fiber, and they are replaced as necessary, but this not only increases equipment costs but also requires time and effort to replace. was there.

[Problem to be solved by the invention]

In view of the above points, it is an object of the present invention to obtain a nip force curve between the apron belts that is most suitable for the 41-length of the sliver. [Means for Solving the Problems] In order to solve the above-mentioned drawbacks of the conventional method, the present invention sandwiches 1ill1 bundle between the top apron belt of the top middle roller and the bottom apron belt of the bottom middle roller, In apron contact pressure equipment for a spinning machine that drafts an m distance between a pair of middle rollers and a pair of front rollers, a plurality of rollers made of magnetic material are brought into contact with the back surface of one apron belt, and the apron belt on the other side facing each other is A plurality of magnets were arranged on the back side facing the roller, and nip pressure was applied to the belt by energizing and unloading each magnet, thereby obtaining an optimal nip force curve suitable for the fiber bundle.

[For production]

The nip pressure between the front roller and the middle roller can be adjusted by changing the magnet to be energized and the amount of energization according to the 1#4 rough length of the fiber bundle to be spun, and by changing the roller that presses against the belt and the pressing force. Change the curve arbitrarily.

【Example】

An embodiment of the present invention will be described based on FIGS. 1 and 2. Each figure shows only the middle roller 1 and front roller 2, and since the other configurations of the spinning machine A are the same as those of the conventional spinning machine, their explanation will be omitted. The middle roller 1 consists of a top middle roller unit 6 consisting of a top middle roller 3, a top tensioner 4, and a top apron 5 stretched between them, a bottom middle roller 7, a bottom tensioner 8, and a bottom apron belt 9 stretched between them. It is composed of a bottom middle roller unit 10. On the side of the top apron belt 5 facing the bottom apron belt 9, there are four rollers made of magnetic material, that is, the first to 40th rollers 12.13, so as to contact the apron belt 5 on the back side of the apron belt 5. .1
4.15 each. Each roller has a shaft 16 at its center, and each shaft 16 is loosely fitted into a longitudinal hole 17 in a support member provided on the side. On the other hand, on the side of the bottom apron belt 9 facing the top apron belt 5, there are five electromagnetic magnets each having a U-shaped cross section so as to contact the bottom apron belt 9 on the back side of the bottom apron belt 9. Fifth magnet 19, 20.21.
22 and 23 respectively. First to fifth coils 25, 26, 27, 28, and 29 are wound around each magnet, and each coil is wound in the same direction and has the same configuration. As shown in FIG. 2, the positive and negative poles of each magnet are connected in the same direction. Therefore, adjacent poles are opposite magnetic poles of the north and south poles. Further, the poles of each adjacent magnet are close to each other, and the magnets are distributed so that the first to fortieth poles 12, 13, and 14 are placed between the adjacent poles. Each roller is made of a magnetic material, and is guided by a shaft 16 and magnet 19 within the range of an elongated hole 17.
Since the magnets 19 to 23 are provided so as to be movable in directions 1 to 23, when each magnet 19 to 23 is energized, the lines of magnetic force between the magnetic poles of adjacent magnets pass through the apron belt 5.9 and reach the roller 1.
2 to 15, each roller is attracted to the magnet. As a result, the top apron belt 5 and bottom apron belt 9, which are in contact with each other, are held between the rollers 12 to 15 and the magnets 19 to 23. Moreover, by applying separate control currents to each of the magnets 19 to 23, the attraction force to each roller 12 to 15 can be made different. , the rollers are nipped at nip points depending on the position of each roller. That is, if only the coil 25 of the first magnet 19 and the coil 26 of the second magnet are energized as shown in FIG.
Only the nip force curve 12 is suctioned, so the top front 0-
A point at a distance β1 from the pressure contact point P of the rubber 32 becomes the nip point. Next, when the coil 26 of the second magnet 20 and the coil 27 of the third magnet are energized, the #I20-ra 13 is attracted, and therefore, as shown in the curve sb, the distance 12 from the pressure contact P is
The point is the nip point. Similarly, when the coil 27 of the third magnet 21 and the coil 28 of the fourth magnet 22 are energized, the 30th magnet 22 is attracted, and a point at a distance of 3°C from the point P becomes the nip point, and the coil 2
When the coil 29 of the 8th and 5th magnets is energized, the 40th-
15 is attracted, and a point at a distance of 14 from point P becomes a nip point. In the above embodiment, there are 4 rollers and 5 magnets.
I showed an example of switching the magnet that is used individually and energized.
The number of rollers and corresponding magnets can be changed arbitrarily. In addition, by changing the current flowing through the coils of the magnet in addition to turning on and off, the shape of the nip force curve shown in Figure 2 can be changed as appropriate, and the shape of the nip force curve shown in Fig. 2 can be changed as appropriate. The nip condition can also be changed arbitrarily depending on the properties.

【Effect of the invention】

Since the present invention is configured as described above, by controlling the energization to each magnet coil in accordance with the optimum nip force determined in advance through experiments for the properties of each IIk fiber, it is possible to It is possible to change the distance and the distribution of the nipping force as desired. Therefore, unlike in the past, there is no need to replace the draft device even if the S miscellaneous changes, reducing equipment costs and saving labor and time for replacement.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a perspective view including a cross section of a main part, FIG. 2 is a sectional view, and FIG. 3 is a sectional view of a conventional spinning frame. Figure 3 1...Middle roller, 2...Front roller. 3...Top middle roller. 5...Top apron belt. 7...Bottom middle roller. 9...Bottom apron belt. 12, 13, 14, 15... Laura. 19, 20.21.22.23...Magnet. 30...sH bundle patent applicant Murata Machinery Co., Ltd. agent Patent attorney Katsu Ohno Agent Patent attorney Shizuko Ohno

Claims (1)

[Claims] 1. An apron pressure device for a spinning machine that sandwiches the fiber bundle between the top apron belt of the top middle roller and the bottom apron belt of the bottom middle roller, and drafts the fiber bundle between the middle roller pair and the front roller pair. In this method, a plurality of rollers made of a magnetic material are brought into contact with the back surface of one apron belt, and a plurality of magnets are arranged opposite to the rollers on the back surface of the apron belt on the other side, and the energization of each magnet is controlled. This apron contact pressure device is characterized by applying nip pressure to the belt.