JP2003105643A - Holding device for clamp roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the change of a nip line position. SOLUTION: In a clamp roller-holding device held in a pressing device with a holding element and pressed to a counter element for forming a nip like, the holding element is adjustably mounted on the press device to change the position of the nip line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for a clamping roller which is held by a holding element in a crimping device and is crimped against an opposing element to form a nip line.

[0002]

2. Description of the Related Art In particular, a clamp roller held in this manner passes a roving thread (lobe) that advances from a front spinning machine (draft device) first through a compression zone, and then twists the roving thread to form one yarn. Is required in the context of the so-called "compression spinning" method. The compression zone is limited by the clamp roller and the counter element in the direction close to the element to which the spinning twist is applied (particularly the ring spinning device), and the clamp roller and the counter roller cooperate with each other to twist the spinning twist into the compression zone. Forming a nip line that prevents the return movement of the. A number of different methods and devices are known for compression spinning, in which case the counter element is, for example, a suction drum with perforations (German Patent Publication 442).
6278, German Patent Publication No. 442
6249 and EP0947614), guided forms of breathable belts (DE 19837179) or as rollers for circulating perforation belts (Germany). Federal Patent No. 1974144
No. 1 specification).

[0003]

[Patent Document 1] German Patent Publication No. 44262
No. 78

[Patent Document 2] German Patent Publication No. 44262
Specification No. 49

[Patent Document 3] European Patent Publication No. 0947614

[Patent Document 4] German Patent Application Publication No. 198
37179 Specification

[Patent Document 5] German Patent No. 1974144
Specification No. 1

[0004]

SUMMARY OF THE INVENTION The object of the invention is to improve a holding device of the type mentioned at the beginning of the specification to allow a change in the nip line position.

[0005]

The first component of the present invention for solving the above-mentioned problems resides in that the holding element is adjustably mounted on the crimping device in order to change the nip line position. .

A second aspect of the present invention that solves the above-mentioned problems is that a clamp roller is adjustably mounted on the holding element to change the position of the nip line.

Front spinning machine (draft device) for ring spinning machine
In the case of, the crimping element is the load arm (B
elastungsarm).

In another embodiment of the invention, a clamping U-shaped member is provided as a holding element, the clamping U-shaped member being divided into two parts, one of which is mounted on the crimping device. , And the other part has a mounting for the clamping roller, and both parts of said clamping U-shaped member are connectable to one another in at least two different positions. In that case, it is advantageous in an embodiment of the invention that one part of the clamp U-shaped part is held pivotably and with an adjustable crimping force.

Due to the fact that the clamp U-shaped member is divided into a part having a pivot axis and a part for mounting the clamp roller, it is possible to connect the two parts to each other at different positions. It is possible to vary the spacing of the nip line of the exit roller pair of the drafting device with respect to the nip line formed by the clamp rollers.

In an embodiment of the invention, both parts of the clamp U-shaped member have moldings which are guided in and out of each other. As a result, it is sufficient to fasten the two parts to each other, for example by means of only one screw. This is because both parts cannot rotate relative to each other on the basis of the molding part.

According to another embodiment of the present invention, the clamp U-shaped member, together with the additional arm (Zusatzarm), is constructed as one component unit which can be mounted on the load arm of the draft device. The additional drafting unit allows the conventional drafting device to be modified in a relatively simple manner into a drafting device suitable for compression spinning. In that case, it is advantageous if the load spring is integrated in the component unit. With this configuration, it is not necessary to take any modification measures on other draft devices.

According to a further advantageous embodiment, the clamp U
A preloadable compression spring is arranged between the profile and the additional arm. This makes it possible to accurately adjust the load force for pressing the clamp roller against the opposing element to the set value. In that case, in a further advantageous embodiment, the maximum pivoting stroke of the clamp U-shaped member with respect to the additional arm is limited by the stop device. In this way, the pre-assembled components are in operation (even if the clamping roller is not in contact with its counter element), since the stroke required for the clamping roller to function is relatively small. Is guaranteed to take a form approximately equal to.

In another embodiment of the invention, the additional arm is covered by a cover hood. This cover hood can be configured, for example, as a grip that can hold the load arm when opening the draft device.

In another embodiment of the invention, the additional arm or cover hood is formed as a holder for the cleaning roller. This makes it possible to add another function to the additional arm or the cover hood fixed to the additional arm.

Other advantages and components of the invention will be apparent on the basis of the following description of an embodiment shown in the drawing.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

The draft device shown in FIG. 1 is associated with a pneumatic compression device. The draft device comprises a pair of pull-in rollers consisting of one bottom roller 10 and one top roller 11 extending in the machine longitudinal direction, and one bottom roller 12 and one top roller 13 extending in the machine longitudinal direction. Position roller pair and one bottom roller 14 and 1
It has an exit roller pair consisting of a book top roller 15. Although it is specified especially for the ring spinning machine, in the draft device which can be used also in, for example, a flyer roving machine, the roving yarn (not shown) includes a bottom roller 12 and a top roller 13 from a bottom roller 10 and a top roller 11. By rotating the bottom roller 14 and the top roller 15 faster than the bottom roller 12 and the top roller 13, the draft is made to have a desired fineness.

Before the drafted roving advances from the draft device, pneumatic compression is performed in the surface area of the bottom roller 14 which is behind the top roller 15. For this purpose, the bottom roller 14 is embodied as a perforated roller, as is known, for example, from DE-A 44 26 249. Inside the perforated roller, a suction insert body is arranged which is connected to a negative pressure source and which is oriented in the rear region of the top roller 15 in a suction slot, in particular a peripheral slot. It has a suction slot extending obliquely to the direction. A clamp roller 16 is provided correspondingly on the outer circumference of the bottom roller 14, and the clamp roller forms a nip line together with the bottom roller 14.
The nip line is a twisting mechanism (not shown), for example, a spin twist added to the roving by a ring spinning device is returned in an intermediate region between the top roller 15 and the clamp roller 16, that is, a pneumatic compression zone. Prevent it from returning to the realm.

The bottom rollers 10, 12 as well as the bottom roller 14 configured as a perforated drum are driven in a manner not shown. Top rollers 11, 13, 15
The clamp roller 16 is frictionally driven by the bottom rollers 10, 12, and 14, which are driven respectively.

The top rollers 11, 13, 15 and the clamp roller 16 have a rubber elastic coating.

The drafting device is usually constructed as a twin unit, that is to say the top rollers 11, 13, 15
The clamp roller 16 is a twin roller having a shaft held by the load arm 17. Since the load arm 17 can swivel around a single swivel shaft 18, the top rollers 11, 13, 15 and the clamp roller 16 are bottom rollers 10, 12, 14 in order to open the draft device.
Can be separated from. Top rollers 11, 13,
As is well known, 15 is loaded by a load spring that determines the pressing force against the bottom rollers 10, 12, 14 when the load arm 17 is held by the lock lever 19 in the operating position shown in FIG.

For the clamp roller 16, that is to say for the clamp roller pair as usual, a unique holding device 20 fixed to the load arm 17 is provided. The holding device 20 has an additional arm 21 of U-shaped cross section, which covers the end region of the load arm 17 from above and which is screw 2
2 and a holding disc 23 having an internal thread, are fixed to the load arm 17.

A screw thread sleeve 25 is fixed to the additional arm 21 by means of two screws 24, which thread sleeve is used as a pivot for a clamp U-shaped member 26. The clamp U-shaped member 26 consists of two parts, namely a pivot lever 27 supported by a thread sleeve 25 and a pressure saddle 28 mounted on the pivot lever. The swiveling lever 27 bears with one arm against the transverse web of the U-shaped additional arm 21 and, together with this transverse web, forms a stopper device which limits the pivoting movement of the clamp U-shaped member 26. The swiveling lever 27 has a housing 30 for a compression spring 31, which comprises a thread pin 32 screwed into the housing 30 and an additional arm 21.
Being supported by the horizontal web. By adjusting the thread pin 32, it is possible to set the preload of the compression spring 31, which acts as a load spring for the clamp roller 16, to a desired spring force.

Pressure saddle 2 fixed to the swivel lever 27
8 has a spring clip 33, which secures the shaft of the clamp roller (pair) 16 in the pressure saddle 28. The pressure saddle 28 has a substantially U-shaped cross section, and the transverse web joining the two legs has a longitudinal profile in the form of a prism or the like. The pressure saddle 28 is guided in the corresponding molding of the swiveling lever 27 by this vertical molding. The pressure saddle 28 is positioned at a prescribed position by a screw 34 screwed into the screw hole of the turning lever 27. As can be seen from FIG. 3, the swivel lever 27 has at least one further threaded hole 35, so that it is possible to fix the pressure saddle 28 in at least one second position of the swivel lever 27. . In this way, the relative position of the clamp roller 16 with respect to the position of the top roller 15 can be changed in the direction of the double arrow A shown in FIG.

In the closed position of the drafting device shown in FIG. 1, the arm of the swiveling lever 27 supporting the pressure saddle 28 is
Since it extends substantially parallel to the tangent of the bottom roller 14, the pressure saddle 28 is adjustable in a substantially tangential direction with respect to the bottom roller 14. In order to obtain the correct crimping force on the clamping roller 16 in any position, the thread pin 32 is readjusted accordingly.

In this embodiment, the pressure saddle 28, and hence the clamp roller 16, can be adjusted with respect to the bottom roller 14 only at two specified positions. Setting a fixed position has the advantage that the error rate is relatively low when adjusting the machine. The point to be considered in this case is that one ring spinning machine has 500 to 600 spinning parts on each machine side, and all the spinning parts must be adjusted as equally as possible.

However, it is also possible to fix the pressure saddle to the swivel lever 27 in a continuously adjustable manner, for example by providing a slot in the transverse web of the pressure saddle 28. In this case, it is advantageous to use an appropriate gauge when adjusting the pressure saddles 28 of all spinning parts.

The additional arm 21 is covered with a cover hood 36, which is preferably made of plastic. The cover hood 36 is used as a grip portion 38, and it is possible to lift the unit including the load arm 17 and the additional arm 21 by gripping the grip portion in order to open the draft device. On the other side, the cover hood 36 is
The mounting means for the cleaning roller (not shown) is formed.

The holding device 20 for the clamp roller 16 is
When used in the context of one drafting device and a trailing compression device with its own bottom roller, rather than in the context of the drafting device shown in FIG. Can be configured equally. The arm of the swiveling lever 27, to which the pressure saddle 28 is fixed, is then configured to be oriented parallel to the tangent of the bottom roller.

In one variation, the additional arm is omitted so that the clamp U-shaped member is attached directly to the load arm.

In a further variant, the clamp U-shaped member is mounted, as a whole, on the load arm 17 or on the additional arm 21 in order to change the position of the nip line.

Furthermore, another solution is conceivable in which, for example, the top roller 15 and the clamp roller 16 are held by a swing arm supported by a load arm or the like, in which case the clamp roller 16 is adjustably mounted on the swing arm. It

[Brief description of drawings]

FIG. 1 is a schematic side view of a draft device including a pneumatic compression device.

FIG. 2 is a perspective view of a holding device for a clamp roller of a compression device.

FIG. 3 is a vertical sectional view of the holding device shown in FIG.

[Explanation of symbols]

10 bottom roller, 11 top roller, 1
2 bottom roller, 13 top roller, 14
Bottom roller, 15 Top roller, 16 Clamp roller, 17 Load arm, 19 Lock lever, 20 Holding device, 21 Additional arm, 22
Screws, 23 retaining discs, 24 screws,
25 thread sleeve, 26 clamp U-shaped member as holding element, 27 swivel lever,
28 pressure saddle, 30 housing part, 31 compression spring, 32 thread pin, 33 spring clip,
34 screws, 36 cover hood, 38
Grip part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Rudec Marina             Switzerland Kloten Gartenstra             1 (72) Inventor Daniel Dietrich             Switzerland Schaffhausen Spiegel             Gutstraße 43 F-term (reference) 4L056 BC06 BC44

Claims (13)

[Claims] 1. A holding device for a clamping roller, which is held by a holding element in a crimping device and is crimped against a counter element to form a nip line, wherein the holding element changes the position of the nip line. A holding device for a clamp roller, which is adjustably attached to a crimping device. 2. A holding device for a clamping roller, which is held by a holding element in a crimping device and is crimped against an opposing element to form a nip line, wherein the clamping roller changes the position of the nip line. A holding device for a clamp roller, characterized in that it is adjustably mounted on a holding element (26). 3. Retaining device according to claim 1, wherein the crimping element is the load arm (17) of the drafting device. 4. A clamping U-shaped member (26) is provided as a holding element, the clamping U-shaped member being divided into two parts (27, 28), one part (27) being crimped. Both parts (27, 28) of the clamp U-shaped member (26) are mounted to the device (17) and the other part (28) has a mounting for the clamp roller (16). Holding device according to claim 2 or 3, which is connectable to each other in at least two different positions. 5. The holding device according to claim 4, wherein one part (27) of the clamp U-shaped member (26) is pivotably held. 6. Both parts (2) of the clamp U-shaped member (26).
7. The holding device according to claim 4 or 5, characterized in that (7, 28) have moldings which are guided in and out of each other. 7. The clamp U-shaped member (26) has an additional arm (2).
7. The holding device according to any one of claims 4 to 6, which together with 1) is configured as one component unit that can be mounted on a crimping device (17). 8. The holding device as claimed in claim 7, wherein the load spring (31) is integrated in the component unit. 9. A clamp U-shaped member (26) and an additional arm (2).
9. Holding device according to claim 8, characterized in that a compression spring (31) with which a preload can be set is arranged between it and 1). 10. The holding device as claimed in claim 7, wherein the maximum swivel stroke of the clamp U-shaped member (26) with respect to the additional arm (21) is limited by a stopper device. 11. The holding device according to claim 7, wherein the additional arm (21) has a U-shaped cross section. 12. The additional arm (21) has a cover hood (3).
Holding device according to any one of claims 7 to 11, which is covered by 6). 13. An additional arm (21) or a cover hood (3).
13. The holding device according to claim 7, wherein 6) is formed as a holder for a cleaning roller.