JPH08260256A - Combed - Google Patents

Abstract

(57) An object of the present invention is to provide a comber capable of simultaneously ensuring a good combing ability and a long operation time of the comber, and enabling a simple mechanical and electronic structure. A minimum spacing between an envelope circle E of a volume segment passed by a cleaning device 30 and a first axis 14 is greater than a maximum radius R of a circular comb 10.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a comb,
A circular comb rotatable about a first axis is provided, the circular comb extending in a circumferential direction of a circumferential surface of a cylindrical body extending coaxially with the first axis. And a cleaning device drivable to rotate along a predetermined track to remove fiber contaminants from the comb segment.

[0002]

BACKGROUND OF THE INVENTION Combers of this type are used in the treatment of textile fibers for the purpose of removing contaminants such as staple fibers and noils from already carded fibril material. The fiber length of the raw fiber material is unified by the treatment with the comb. For this reason, the comb is usually placed between the card and the drafting device during the fiber treatment.

In the comb, a fiber tuft (Faserbart) of already carded fibers is held by the nippers of a reciprocating rocking nipper device and passed through the teeth of a circular comb located below it, which ,
It is mixed with the already combed fiber sliver. Alternatively, it is also possible to use a comb which only combs after the fiber tufts have been mixed.

The short fibers and noils removed by combing from the fiber tufts are mostly carried by the comb segments. In order to avoid blockage of the comb segments, these fiber contaminants removed by combing must be removed therefrom again. For this purpose, a cleaning device with a large number of cleaning brushes is usually used, in which case the cleaning brushes are rotatable about a second axis extending parallel to the first axis. It is fixed to the holder.

To clean the comb segment, a cleaning brush passes through the comb segment,
This makes it possible to take out and remove the staple fibers and the noils carried by the comb segments. Therefore, comb segments that are exposed to high friction during cleaning due to such fiber treatments will be significantly worn, resulting in a reduced useful life of the comb segments. For that reason, the comb segments often have to be replaced, i.e. every 2-4 years.

Furthermore, the bristles of a cleaning brush, which are generally made of plastic, are subject to high wear, also by cleaning the comb segments. As a result,
To compensate for bristles wear, it is necessary to adjust the rotation axis of the cleaning brush towards the rotation axis of the circular comb. Furthermore, the wear of the bristles reduces the peripheral speed of the cleaning brush when the rotational speeds are equal. Therefore, in order to ensure equal cleaning capacity, a unique motor for the cleaning brush, i.e., a controllable motor for automatically compensating the wear of the bristles of the cleaning brush by increasing the speed of rotation of the cleaning brush is required. make use of,
Need to drive. This in turn increases the mechanical and electronic manufacturing costs of the universal comb cleaning device.

Furthermore, when operating a general-purpose comb,
The short fibers or noils removed from the comb segments with the aid of a cleaning device are mostly debris and collect in the area where the fiber tufts are treated by the comb segments. As a result, the combing ability deteriorates. Because the short fibers and noils thus debris are also deposited in the tufts that have already been passed by the circular comb, the staples of the fibril material, which have already been improved by the combing action, are restored. to degrade.

[0008]

SUMMARY OF THE INVENTION The object of the invention is therefore to obtain a combing system which at the same time guarantees a good combing capacity and a long running time of the comber, while still allowing a simple mechanical and electronic construction. Is to provide.

[0009]

SUMMARY OF THE INVENTION In order to solve this problem, the invention provides a comber of the type mentioned at the outset between the envelope of the volume segment passed by the cleaning device and the first axis. Has a minimum spacing greater than the maximum radius of the circular comb.

[0010]

By arranging the circular comb and the cleaning device in this way, it is possible to reliably avoid direct contact between the circular comb and the cleaning device when the comb is operating. Therefore, the additional wear of the comb segments and the cleaning device caused by the direct contact of the circular comb with the cleaning device during the operation of a universal comb is avoided during the operation of the comb according to the invention. This prolongs the useful life of the comb segment and thus extends the effective combing time as a whole. Furthermore, the comb according to the invention can be realized with a simple mechanical structure. Because the comb segments are contactlessly cleaned, there is no need to readjust the position and rotational speed of the cleaning device during the combing operation.

According to the present invention, the short fibers can be reliably and sufficiently removed from the comb segment in spite of the contactless operation of the cleaning device. Because the majority of the staple fibers entrained by the comb segment partially protrude from the comb segment on the side of the comb segment opposite to the first axis, these staple fibers are therefore circular. It can also be gripped and removed from the comb segment by a cleaning device that rotates away from the comb.

Furthermore, during operation of the comb according to the invention, the spring-elastic return movement of the bristles of the cleaning brush, which occurs after the comb segments have been released during operation of a general-purpose comb, is avoided. Such a spring-elastic return movement of the cleaning brush blows away the short fibers removed from the comb segment from the cleaning brush immediately after the comb segment is released during operation of a general-purpose comb. This is the reason for the high short fiber waste condensation in the natural combing range of the universal comb. On the other hand, when operating the comb according to the present invention,
Since the short fibers are entrained by the cleaning device over a large range of a given trajectory, the condensation of short fiber debris in the combing range is small and therefore the combing capacity is improved.

Even if the distance between the circular comb and the cleaning device, which further guarantees a satisfactory cleaning effect, depends on the type of textile material to be treated, of the volume segment passed by the cleaning device. The best cleaning effect is achieved if the minimum distance between the envelope circle and the first axis exceeds the maximum radius of the circular comb by at most approximately 0.5 mm, advantageously at most 0.1 mm. can get.

If the predetermined trajectory is a circular trajectory centered on the second axis, the comb according to the invention can be realized structurally particularly simply. In this case, if the circular comb and the cleaning device are rotatable in mutually opposite directions, condensation of short fibers in the original combing range can be sufficiently avoided. In this case, the peripheral speed of the cleaning device is higher than the peripheral speed of the circular comb. With this configuration, it is possible to avoid an uncontrollable vortex-like air flow in the cleaning range while simultaneously maintaining a high cleaning effect.
This is because such an arrangement makes it possible to keep the relative speed of the cleaning device with respect to the comb segment in the cleaning range to a particularly small value.

If the cleaning device is provided with a saw-tooth wire, instead of the commonly used cleaning brush, a given trajectory can be maintained particularly accurately and thus the volume segment passed by the cleaning device. The spacing between the enveloping circle and the circular comb can be reduced to a value of 0.05 mm or less in order to enhance the cleaning effect. By using a saw-toothed wire having a regular structure, not only the cleaning effect can be enhanced, but also the spiral airflow generated in the cleaning range can be further reduced. This helps to further reduce the condensation of short fiber waste in the combing range.

In order to carry out a rotation along a circular path, a saw-tooth wire is provided on a cylindrical carrier which extends coaxially with respect to the second axis and is rotatable about this axis. It is advantageous if it is fixed. The holder is 14 in this case
It can have a diameter of 0 mm or less.

Furthermore, in this case, if the saw-toothed wire is helically mounted on the holder, then a complete cleaning of the comb segments can be achieved particularly easily. During operation of the comb according to the invention, the sawtooth of the sawtooth wire is approximately 105 ° between the front surface and the wire base.
With a rake angle of, even if the relative speed between the cleaning device and the comb segment is small,
It has been found that the fibers can be taken out and carried particularly well. In order to increase this relative speed, it is advantageous if the sawteeth of the sawtooth wire have a rake angle of less than 90 ° and the sawtooth is inclined in the direction of rotation of the cleaning device. is there.

In order to increase the operational reliability of the comb according to the invention, it is necessary to discharge the short fibers from the comb, and for such discharge of the short fibers, a cleaning device removes them from the comb segment. It is advantageous if a suction device for absorbing the short fibers is assigned.

When the cleaning device rotates along a circular orbit, the suction device has a cylinder having a radius larger than the radius of the envelope circle of the cleaning device and extending coaxially with the second axis. A particularly great suction effect can be obtained if the suction opening is in the form of a section of the peripheral surface of the shape. It is also advantageous for the suction openings to be covered by a grid with continuous slots or holes in order to guide the air flow in order to further enhance the suction effect.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described with reference to the drawings.

In FIG. 1, only a portion of the combs necessary to understand the invention are shown, namely the circular comb 10 and the cleaning device 30.

In the embodiment of the invention shown in FIG. 1,
The circular comb 10 mainly comprises a holder 12 rotatable about an axis 14 in a direction indicated by an arrow 15.
It comprises a comb segment 18 fixed to the holder with screws 16. The comb segment 18 itself comprises a base body 20, on the side of the base body 20 opposite to the holding body 12, a plurality of parallel saw-tooth wires extending in the circumferential direction of the circumferential surface of the cylindrical body. The strips 22 are fixed and these saw wire strips 22 are shown in the drawing.
Only one of them is shown. As can be further seen from the drawings, the saw-tooth wire strip 22 is composed of a plurality of wire segments with different tooth shapes.
This can improve the combing action.

The cleaning device 30 includes a hollow cylindrical holder 36 which rotates about an axis 32 in a direction indicated by an arrow 34, and a sawtooth wire all-steel helically attached to the holder. It is composed of a needle cloth 38. The circular comb 10 and the cleaning device 30 are arranged as follows. The enveloping circle E of the volume segment that is passed by the lining device in contact with the tooth tips of the sawtooth wire all-steel clothing 38 in this case.
And the minimum distance d between the first axis 14 and the maximum radius R of the circular comb, that is, the distance d between the first axis 14 and the tooth tip of the sawtooth wire strip 22. . This ensures that the comb segment 18 is cleaned without contact with the lining device 30.

A suction device 50 is associated with the cleaning device 30 for ejecting the knots removed from the comb segment 18 and entrained by the sawtooth wire all-steel clothing 38 from the comber. In order to optimize the suction effect, the suction device 50 has a suction opening 52 which, with respect to the second axis 32, of the cylinder having a radius greater than the radius of the envelope circle E. It is in the form of a section of a circumferential surface that extends coaxially. In order to further enhance the suction effect, the airflow reaching the suction device 50 is covered by a grid body 5 which covers the suction openings and is penetrated by the slots.
4 is used to guide as indicated by arrow 56.

FIG. 2 shows, in addition to the components of the comber already explained in FIG. 1, a nipper device Z which serves for supplying the fiber tufts to be cleaned.
The nipper device Z includes a lower gripper 101 and an upper nipper 107 that is pivotally mounted so as to be pivotable about a pivot point 108 of the lower gripper and that includes a gripping knife 106. Lower gripper 1
01, a supply cylinder S is rotatably supported,
The supply cylinder S conveys the wrap W supplied to the nipper device Z toward the tearing cylinder pair 110, 111. The lower gripper 101 is rotatably supported by arms 102 and 103. Below the nipper device Z, a circular comb R with a comb segment 109 is rotatably supported. In this embodiment, the comb teeth of the comb segment are formed in the form of a needle 104, the tip of which is the tip of the comb segment 10.
When rotating 9, it moves along a circular orbit 105. In order to clean the comb segments 104, a cleaning device 123 having a rotatable holder 136 and an all-steel clothing 124 attached to the holder is also provided in this embodiment. However, in this embodiment the teeth 125 of the all-steel clothing 124 have an acute angle of inclination and are oriented in the direction of rotation of the cleaning device. The envelope circle 127 of the tooth 125 has a distance X from the circular trajectory of the tip of the needle 104 of the comb segment 109.

The cleaning device 123 is further associated with an adjusting device 118, which adjusts the distance X precisely by means of an arm 116 pivotably mounted on a rotation axis 117. To enable. However, other adjusting devices are also possible. The peripheral speed of the cleaning device 123 is approximately 8 to 10 higher than the peripheral speed of the circular comb R in the range of the tip of the needle 104.
%high. In the cleaning range A, the material (short fibers, noils, etc.) carried by the comb segment 109
Are taken out by the cleaning device. In this case, in order to obtain the desired take-out effect, in particular, an appropriate interval X
The adjustment of (target value of X) and the appropriate air guidance have a great meaning.

The cleaning device 123 is arranged inside the discharge shaft 120.
Negative pressure is applied to 0 in order to discharge the staple fibers and the noils taken out by the needle 104 into the passage 121.

The invention is not limited to the embodiments shown. For example, in the comb according to the invention, if the peripheral speed of the comb segment is higher than the peripheral speed of the cleaning device, an all-steel clothing with teeth opposite to the direction of rotation of the cleaning device is attached to the cleaning device. May be. Furthermore, it is also possible for the suction opening 52 of the suction device 50 to extend over a larger or smaller circumferential section of the envelope circle E.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a first embodiment of a comb according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of a comb according to the present invention.

[Explanation of symbols]

10 circular combs, 12 holders, 14 axes,
15 arrows, 16 screws, 18 comb segments,
30 cleaning device, 32 axis line, 34 arrow, 36 holding body, 38 saw tooth wire / all-steel clothing, 50 suction device, 52 suction opening, 54 lattice, 56 arrow, 101 lower gripper, 102, 103 arm, 104 needles, 105 circular orbits, 106 gripping knives, 107 upper nippers, 108 turning points, 1
09 comb segment, 110,111 tearing cylinder, 116 arm, 117 rotational axis, 1
18 adjusting device, 120 discharge shaft, 121 passage, 123 cleaning device, 124 all-steel cloth, 125 teeth, 127 envelope circle, 13
6 Holder, E Envelope circle, R Maximum radius of circular comb, W wrap, X interval, Z nipper device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 595178106 Graf Und Company Actien Gesellschaft Rapperswil, Switzerland (no street number) (72) Inventor Peter Gneggie Stefa Auf Saarleinline, Switzerland 10 (72) Ralf Graf Switzerland Freienbach Strandweg 4

Claims (14)

[Claims] 1. A comb, comprising a circular comb (10; 100) rotatable about a first axis (14), the circular comb (10; 100) comprising:
Comb segments (18, 2) extending in the circumferential direction of the cylindrical peripheral surface extending coaxially with respect to the axis (14) of the.
0,22; 109) and is drivable to rotate along a predetermined track to remove fiber contaminants from the comb segment (18,20,22; 109). (30; 123) is provided, the cleaning device (30;
123) that the minimum distance between the envelope circle (E; 127) of the volume segment passed by 123) and the first axis (14) is greater than the maximum radius (R) of the circular comb (10; 100). Characterized comb. 2. A minimum distance between circular combs (10; 10).
2. The comb according to claim 1, wherein the maximum radius (R) of 0) is exceeded by approximately 0.05 to 0.5 mm, preferably at most 0.1 mm. 3. The comb according to claim 1, wherein the predetermined trajectory is a circular trajectory centered on the second axis (32). 4. The comb according to claim 3, wherein the circular comb (10; 100) and the cleaning device (30; 123) are rotatable in opposite directions. 5. The comb according to claim 4, wherein the peripheral speed of the cleaning device (30; 123) is greater than the peripheral speed of the circular comb (10; 100). 6. Comber according to claim 1, wherein the cleaning device (30; 123) comprises a saw-tooth wire (38; 124). 7. A sawtooth wire (38; 124) is provided with a second
Extending coaxially with respect to the axis (32) of the
7. The comb according to claim 6, which is fixed to a cylindrical holder (36) rotatable about 2). 8. The comb according to claim 7, wherein the saw-toothed wire (38; 124) is helically attached to the holding body (36). 9. A saw wire (38) having about 10 saw teeth.
9. The comb according to claim 6, which has a rake angle of 5 °. 10. The comb according to claim 6, wherein the saw teeth of the saw-toothed wire have a rake angle of less than 90 °. 11. The cleaning device (30) according to any one of claims 1 to 10, wherein a suction device (50) for sucking short fibers removed from the comb segments (18, 20, 22) is assigned to the cleaning device (30). Or the comb according to item 1. 12. A cylinder, the suction device (50) of which has a radius greater than the radius of the envelope circle (E) of the cleaning device (30) and which extends coaxially with respect to the second axis (32). A comb according to claim 10, characterized in that it has a suction opening (52) in the form of a section of the peripheral surface of the profile. 13. The comb according to claim 11, wherein the suction opening (52) is covered by a grid (54) having continuous slots or holes. 14. On the circular comb (10; 100),
14. A comb according to any one of claims 1 to 13, wherein a reciprocating rocking nipper device is provided for supplying the tufts to be combed.