JPS62289620A - Drafting apparatus for spinning machine - Google Patents

Abstract

PURPOSE:To obtain the titled apparatus without affecting the adjacent slivers even when winding around bottom rollers, etc., occurs during spinning, by dividedly providing top rollers, in each spindle, supporting both ends with a shaft supporting member and keeping the parallelism to the bottom rollers. CONSTITUTION:Each bottom roller (1a), (1b)... is provided with each facing top roller (6a), (6b)... and supporting mechanism 12 for the top toller. Each top roller is dividedly provided for each spindle and supporting arms 13 and 13 and shaft supporting member 14 are installed in the supporting mechanism 12. The shaft supporting member 14 supports the supporting shaft 9 of each top roller and the supporting shaft 9 is pressed to the side of the bottom roller by a pressing spring 25.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a draft device for supplying fiber bundles such as sliver or fleece (hereinafter simply referred to as sliver) in a spinning machine.

[Prior Art] In general, as a drafting device in a spinning frame, a method is widely used in which a plurality of bottom rollers with different surface speeds are arranged in parallel, a top roller is pressed against each bottom roller, and the supplied sliver is drafted. .

An example of this method is shown in FIGS. 8 and 9. The figure shows a drafting device 50 of three pairs of rollers and equipped with one set of apron bands.This drafting device 50 includes front bottom rollers 51. Top rollers 54 and 5 facing each of the middle bottom roller 52 and the back bottom roller 53
5.58 and a support arm 57 that supports the top roller and presses it toward the bottom roller. In this case, two top rollers (for two spindles) form a set, and the support shaft 54a.

The center portions of 55a, 58a are fixed to the tips of swinging arms 80, 61.62, each of which has one end pivotally supported, and springs 83, 84.
85 is used. However, 5 in the diagram
8 and 59 are lower and upper apron bands, respectively.

[Problems to be Solved by the Invention] With the above configuration, when one of the slivers being spun is wound around, for example, the front bottom roller 51, the diameter of the bottom roller becomes large, and the top roller 54 is therefore tilted. However, there are problems such as uneven load distribution on the other sliver being spun, resulting in yarn unevenness. Furthermore, each top roller is only supported at the center of the support shafts 54a, 55a, and 58a, and due to vibrations during rotation of the bottom roller, the axis of the top roller is slightly crossed with the axis of the bottom roller. There is a risk of migration.

Also, the swing arm H, 131, which supports each support shaft 54a...
The fulcrums 68, 87, 68 of I32 are normally located on the sliver supply side with respect to each top roller, and therefore there is a risk that the running sliver will push it up and make gripping unstable. Particularly in recent years, there has been a demand for higher speed spinning machines, and as the sliver moves at higher speeds, there are problems such as gripping becomes uncertain.

In view of the above, it is an object of the present invention to provide a draft device that securely grips the sliver even when the speed of a spinning frame is increased, prevents the occurrence of draft irregularities, and is easy to handle.

[Means for solving problems]

The present invention for achieving the above object will be explained using FIGS. 1 to 6 which correspond to embodiments.

The draft device 5 of the present invention includes each bottom roller la.

Top rollers 6a, 6b facing respectively 1b...
...and a support mechanism 1 that supports each of these top rollers.
2. Each of the above top rollers 8a, 8b...(
(hereinafter referred to collectively as 6) has a structure divided into each tumor, and the support mechanism 12 includes a pair of support arms 13.1 disposed on both sides of the top roller 6, perpendicular to its axis.
3, and a shaft support member 14 that is attached to each support arm 13 and supports the support shaft 9 of each top roller. This shaft support member 14 is provided with a pressing spring 25 that presses the support shaft 9 of the top roller 6 toward the bottom rollers la, lb, . . . .

[Function] The top roller 6 has one spindle at a time, and both ends are connected to the shaft supporting member 14.
Therefore, the parallelism with respect to the bottom roller will not be disturbed. Further, even if the sliver wraps around the bottom roller or the like during spinning, it will not affect the sliver in the adjacent draft. Furthermore, the shaft support member 14 is attached to the support arm 1.
By attaching the center line connecting the top roller and the bottom roller to the appropriate position in step 3, the top roller can be placed opposite the bottom roller at any position depending on the spinning conditions, such as at a position perpendicular to the center line connecting the top roller and the bottom roller, or at a position before or after it. be able to.

〔Example] FIG. 1 is a plan view of the present invention, and FIG. 2 is a front view thereof.

The figure shows an example in which the draft device of the present invention is applied to a 5-wire system equipped with two double aprons, where la is the front bottom roller, 1b is the back bottom roller, lc, l.
d and 1e are first, second, and third intermediate bottom rollers (hereinafter, they will be simply referred to as 1 when collectively referred to), and the first and third intermediate bottom rollers lc and le are provided with well-known means. The lower apron band 2.3 is attached.

In contrast, the draft device 5 of the present invention includes top rollers Ba, [fb...8e (hereinafter collectively referred to simply as 6) for each bottom roller 1, and a support mechanism 12 that supports each top roller.

However, 6a is the front top roller, 6b is the pack roller, 6c, 6d, and Be are the first, second, and third intermediate top rollers, and the first and third intermediate top rollers are provided with an appropriately structured apron mounting frame. 7a and 7b, around which upper apron bands 8a and 8b are wrapped.

Each top roller 6 is formed in units of one spindle, and is made up of a cell 10 wrapped with rubber and rotatably attached to the middle part of a fixed support shaft 9.

The support mechanism 12 is perpendicular to the axis of each top roller 6,
and left and right support arms 13 provided on both sides thereof.
13, and a shaft support member 14 that is attached to each support arm and supports the support shaft 9 of each top roller 6.

The support arms 1s and ta are connected by a connecting rod 15 at a predetermined interval, and their rear ends are rotatably supported by a bracket 17 fixed to a mounting bar 18 provided at the rear of each bottom roller 1. The top roller 6 is locked at the pressing position against the bottom roller 1.

18 is an operation handle.

The shaft support member 14 is detachably attached to the support arm 13 at a proper location, and supports the support shaft 9 of the top roller 6 at its lower end so that it can move up and down.
The left and right shaft support members that support... have the same structure, and will be explained below based on FIGS. 3 to 6.

The shaft support member 14 is a shaft support body 20 attached to the support arm 13.
and a contact plate 2I, and supports the support arm 13 with a tightening bolt 22. A support shaft 9 is provided at the bottom of the main body 20 and the contact plate 21.
A vertical groove 23 is formed into which the main body 20 is slidably inserted in the vertical direction, and a vertical hole 24 communicating with the vertical groove 23 is bored in the main body 20. Insert the contacting stop 26. Although the stopper 26 is shown as having a structure that simply presses the support shaft 9, it may have a structure that supports the support shaft 9 in a detachable manner.

A spring pressure adjusting means 27 is provided on the upper part of the pressing spring 25, and a mounting cap 28 is attached thereto. This spring pressure adjusting means 27 can have various structures, and the figure shows one example. That is, the spring pressure adjustment means 2T has two adjustment pieces 30.3.
1, each horizontally arranged in the shape of a prismatic column, with spring contact surfaces 30a on the upper and lower surfaces.

30b, 31a, and 31b are formed. These adjustment pieces 30
．． 31 have different thicknesses, and the contact surfaces have different heights from the center line of the adjustment piece, and as shown in FIG. To,
Moreover, the spring compression length is changed to Y or Z by changing the adjustment pieces 30 and 31 up and down and selecting the mounting direction of the adjustment pieces 31, and the mounting cap 28 is fixedly mounted.

In FIG. 2, 35 is a trumpet for introducing the sliver, and 3B, 37 and 38 are collectors, respectively.

The embodiment of the present invention has the above-described configuration, in which the shaft support member 14 is fixed at a proper position on the support arm 13, and each top roller 6a,
8b... are supported by bottom rollers la, lb... opposite to each other. In this case, the center line connecting the bottom roller 1 and the top roller 6 may be positioned perpendicular to the flow direction of the sliver, or the top roller 6 may be positioned slightly forward or backward from the center line, so-called forwarding or It may also be positioned at a post-extrusion position, which is determined depending on the required spinning conditions. Please press further.

The pressure springs 25 are each adjusted by a spring pressure adjusting means 27 to adjust the respective pressing forces against the top rollers 6a, 6b, . . . to a required pressure, and to uniformly regulate the left and right pressing forces.

Next, FIG. 7 shows various types of draft devices to which the present invention is applied, and the draft device 40 shown in FIG.
It has a structure with paired rollers and one set of apron bands. Figure (b) shows a 4-pair roller type without an apron band, and figure (C) also shows a 5-pair type without an apron band. It is a roller type. In each case, the top rollers Ba, 6b, etc. are formed separately for each bed, and the support mechanism that supports the top rollers has the same structure as the previous example, and the same parts are given the same reference numerals. The explanation will be omitted.

[Effects of the Invention] According to the present invention, since the top roller is provided separately for each tumor, even if a problem occurs in the spinning operation such as winding of the sliver on the bottom roller or top roller, the adjacent It does not affect the draft of the sliver. In addition, since the shaft supporting member can be attached to any position on the support arm, the top roller axis can always be reliably kept parallel to the bottom roller axis, and the front and back position relative to the bottom roller can also be freely adjusted. can. Furthermore, since each top roller applies pressure on both sides, the sliver can be held with uniform pressure over the entire width of the sliver held between the bottom roller and the sliver, which has the effect of preventing draft unevenness.

[Brief explanation of the drawing]

1 to 6 relate to an embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a front view, and FIGS. 3 to 5 are related to a shaft support member, and FIG. 3 is a front view, and FIG. 4 is a longitudinal sectional view, FIG. 5 is a plan view, FIG. 6 is an explanatory diagram of the action of the spring pressure adjusting means, FIG. 7 is an explanatory diagram of various draft devices showing modified examples of the present invention, and FIG.
9 and 9 relate to a conventional example, FIG. 8 is a plan view thereof, and FIG. 9 is an explanatory diagram of the pressure applied to the top roller. la, lb... are bottom rollers, 5 is a draft device for a spinning frame, 6a, 6b... are top rollers, 9 is a top roller support shaft, 12 is a support mechanism, 13 is a support arm, 1
4 is a shaft support member, 25 is a pressure spring, 27 is a spring pressure adjustment means, and 30.31 is an adjustment piece.

Claims (5)

[Claims] (1) Equipped with a top roller that faces each of the bottom rollers arranged in parallel, and a support mechanism that supports the top roller. It consists of a pair of support arms arranged perpendicular to the center and on both sides, and a shaft support member attached to each support arm and supporting the support shaft of each top roller. A draft device for a spinning machine, characterized in that it is equipped with a pressure spring that applies pressure to a bottom roller side. (2) The drafting device for a spinning frame according to claim 1, wherein the shaft support members for each top roller have independent and identical structures and are attached to the support arm so as to be adjustable in the longitudinal direction thereof. (3) The pressure spring is located above the spindle of the top roller,
A draft device for a spinning frame according to claims 1 and 2, which is provided perpendicularly to the support shaft. (4) The draft device for a spinning frame according to claims 1 to 3, wherein the pressure spring is provided with a spring pressure adjusting means. (5) The spring pressure adjusting means includes a reversible adjustment piece, and the adjustment piece has a plurality of spring contact surfaces, and each spring contact surface is set at a different distance from the axis of the adjustment piece. A draft device for a spinning frame according to scope 4.