JPS6099022A - Draft apparatus for spinning machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to a drafting device for drafting stable fiber fleeces, stable fiber bundles or stable rovings, comprising at least two pressure cylinders. the pressure cylinder is supported on both sides in journal bearings and is received in the drafting device frame, and the journal bearing is arranged on one of the pressure cylinders by a power means loadable by a pressure medium. It relates to a type that can be crimped onto a lower cylinder.

In the drafting device 4, the staple fiber fleece, the staple fiber bundle or the staple roving is drafted in a draft zone formed by two roller pairs in each case. Each such roller pair consists of a lower roller and a pressure roller for pressing onto the lower roller. Since more than one drafting zone is usually provided in drafting devices, two or more pairs of rollers are installed one after the other with a distance corresponding to the length of this drafting zone. ing.

The pressure roller is arranged 61 in the drafting device frame so that it can pivot in the direction away from the troller. The pressing of the pressure roller against the lower roller is effected by a power medium, which acts on journal supports provided on both sides of the pressure roller.

BACKGROUND OF THE INVENTION It is known from European Patent Application No. 0 062 185 that journal bearings generate a force that is sufficient to press the pressure roller against the troller whenever the compressed air cylinder presses the pressure roller against the roller.

In this type, a drafting device with a large number of drafting zones requires a considerable number of pressure cylinders, which increases the production costs of such a drafting device.

Such drawbacks have been eliminated by the invention as defined by the features of claim 1.

Advantageous embodiments of the drafting device according to the invention as defined in claim 1 are obtained by the measures set forth in the following claims.

The invention provides the advantage that the production costs for the drafting device are not only reduced, but also that the permissive force of each pressure roller can be varied pair by pair in a very simple manner.

The drafting device 1 according to the embodiment has a predetermined number of lower rollers 2 and a number of pressure rollers 3 which come into contact with the lower rollers 2 at the working position.

The lower roller 2 is rotatably supported on a fixed portion (not shown) of the machine frame 4 and is driven by a drive means (not shown).

The pressure rollers 3 are each mounted in journal bearings 6 via their shafts 5. This journal bearing 6 itself is guided in a U-shaped support 7 and is fixed to this support 7 by means of a plate 8, as shown in FIGS. 1 to 4.
It is held in the position shown above. Furthermore, this journal bearing 6 has a square shape of 911. ; part jS
The support body 70 is guided within the guiding slit 10 so as to have a reciprocating interlock hJ function with respect to the lower roller.

The support 7 is itself mounted on a yoke 11 on both sides of the pressure roller 3 and is placed at a stop 1' for movement at this point 2 and is secured to a selected position via a fixing screw 12. This 1-selected position means that the pressure roller 3
is at the lower roller 2 and the turning position 1i'+, and if both j'; 7 - by moving the troller and pressure roller, as is known per se, the length of the draft area defined by the spacing of the rollers to the relative lL can be increased by 1. The yokes 11 on the left and right sides of the pressure roller 3 are connected by a U-shaped coupling member 13 on the rear side of the drafting device 1.
On the front side, they are fixedly connected to each other by a flat connecting member 14, and the frame as a whole (not shown)
to accomplish. On the rear side of the drafting device, this frame has an arm 15 arranged on both sides on a support 16 fixed to the machine frame 4 so as to be able to pivot about a pivot bin 17 in each case.
It is arranged so that it can turn in the direction of arrow S through.

On the front side of this drafting device, this frame is fixed to a yoke 11 and two drafts, known per se, which are arranged on one finger, each pivotable about a pivot pin 18, are connected by means of a device 19 shown in FIG. Fixed in the indicated working position. This fastening takes place in that the device 19 is suspended at its end opposite the yoke on a hook 20 which is fixedly connected to the machine frame. To release the tightening, move the grip 21 in the direction of the arrow E. To tighten the persimmon, do this by moving the grip 21 in the direction opposite to the arrow (C). It will be done.

Furthermore, a pressure hose 22 is embedded in each yoke 11 along the entire length of the yoke. This pressure port 22 is connected to the compressed air pipe 24 via a connecting member 23 on the rear side of the draft device.

The journal bearing 6 is located at the upper side +4111
・This, that is, ψ directed toward the pressure hose 22::,;
! 31) This journalllll1llreceptor6
It has a pressure plate 25 fixedly connected to or cast in one piece, which pressure plate 25 is brought into contact with the pressure port. Now, F rat apparatus 1°′1
Working position 1i'+tl [capose 22
Compressed air is supplied from Ryo 26 to Kani Jr', t
71゛Through 27, H [is brought to the desired pressure, and the
When the compressed air released by the boat 2-position directional valve 28 is delivered, all journals belonging to this pressure port 722 'I! III Uke wa ITh Kahorse 2
2 and the pressure plate 25 receives a force corresponding to the pressing force between the pressure roller 3 and the lower roller 2.

Contact 114 between this pressure hose 22 and pressure plate 25
1 is defined by the contact width B and length L of the pressure plate 25. Furthermore, it is clear that by adjusting the length of the pressure plate, the pressing force between the pressure roller 3 and the lower roller 2 can be adapted to the requirements in a very simple manner. be. Furthermore, if necessary, different pressing forces can be selected for each pair of rollers without changing the pressure in the pressure hose 22.

As already mentioned, - the support 7 is disposed movably on the yoke 11 and has a guide groove 30 provided on each side of the yoke and a guide groove 30 attached to the support T; 1. going upwards via the guide bin 31 which enters into the guide bin 30; In other words, movement in the direction away from the troller 2 is prevented. It is reliably avoided that the support body 7 is moved upwards as it is being held.

Pressure hose 2 in the air outlet 1 between the pressure plates 25
In order to extend the bulge of 2 to approximately 1 (negative 1, this pressure hose 22 is reinforced or this 1llll plus 1.11, the total length of the pressure hose 22 is equal to u: = r). ,
And, on this pressure hose 22, a journal bearing 6 (4c) corresponding to the journal bearing 6 (4c) is mounted, and at least the contact jflJB width 1 is mounted on this pressure hose 22.
It is also possible to provide this pressure hose 22 with a thin plate for IJ. The thickness of this thin plate must be determined on a case-by-case basis depending on each drafting device.

In order to rotate the above-mentioned frame in the correct direction, pull the tightening grip 021 in the direction of arrow E and remove the tightening device 19 from the hook 20. There must be. Next is the flat j117 FXII4A
' 14 In some cases, the grip 029, which has been used in a number of cases, can be used to rotate the frame upwards. A spring, an air spring may or may not be provided.

First and foremost, however, the six-boat two-position directional valve 28 must be brought to the shutoff position IN shown in FIG.

[Brief explanation of the drawing]

FIG. 1 shows a partial vertical cross-section of the draft device according to the present invention along the cut IJ5raL shown in FIG. 2, and FIG. 2 shows the draft device shown in FIG. (A front view seen from the direction of (); FIG. 6 is an enlarged cross-sectional view of the draft device shown in FIG. 1 taken along cutting line ■;
FIG. 4 is a partial vertical sectional view of this draft device taken along the cutting line 1v in FIG. 6. DESCRIPTION OF SYMBOLS 1... Draft device, 2... Lower roller, 3... Pressure roller, 4... Machine frame, 5... Shafts 5, 6...
Journal bearing, 1...Support, 8...Plate, 9
...End portion, 10...Guiding slit, 11...
・Yoke, 12...Fixing screw, 13.14...Fixing screw, 15...Arm, 16...Support, 17.18
Rotating bottle, 19... Tightening device, 20 Hook, 21
...Tighten with the grip, 22...car hose, 23.
Connection connecting member, 24...Compressed air guide σ, 25...Couple plate, 26...Compression image source, 21...Pressure adjustment valve, 28...6 boat 2nd position f4 direction switching valve, 29
...Grip, 30...For guidance? +4.31 ・Guidance bottle

Claims (1)

[Claims] 1. A drafting device for a spinning machine for drafting staple fiber fleeces, staple fiber bundles or stable rovings, comprising at least two pressure cylinders, the pressure cylinders comprising: It is supported on journal bearings on both sides and is received in the drafting device frame and can be crimped onto a lower cylinder arranged below the pressure cylinder by power means that can be loaded by the journal bearings or by a pressure medium. of the type characterized in that the power means is a pressure hose extending over all pressure cylinder journal bearings on the pressure cylinder side thereof, a stesol fiber fleece, a stesol fiber bundle or a stable roving. Draft device for spinning machine to draft? '1゜2, the pressure hose is mounted on a contact surface of the journal bearing, and this contact surface is adaptable to the force to be applied to each pressure cylinder journal bearing;
Particularly 5'1 The draft device according to item 1. 6. The pressure cylinder moves, ii.
, 7 ii'1 Draft device K according to claim 1
(4. On the side of the pressure hose facing the contact surface, a support strip 11 is provided, by means of which support strip 11 is provided between the contact surfaces of two journal bearings arranged one after the other f3. A draft device (f'i:) according to claim 1 or 2, in which bulging of the pressure hose is substantially avoided. 6. A pressure regulating valve connected to the pressure hose and the compressed air source is provided, and the operation is controlled via the pressure regulating valve. The draft device according to claim 1, wherein the pressure required for the draft is adjusted to a certain level.