EP0790338B1 - Adjustment means on a carding machine - Google Patents

Description

In a first aspect, the invention relates to an adjusting device on a card according to the preamble of claim 1.

State of the art for the adjusting device

Fig. 1 shows an arrangement known from EP-A-432430. It embraces itself below and along the drum roll 1 extending element 4 in the transition zone between the drum 1 and the customer 2. This element 4 is used for air guidance in the diverging gap between drum 1 and customer 2.

From the applicant's earlier application, EP-A-432430, is an adjustment device 4, which is below and along the drum roll 1 on the side of the customer 2 extends (cf. FIGS. 1, 2 of EP-A-432430). The adjustment device comprises a baffle, also called a tongue, and has the task of guiding the air in the diverging gap, to optimally control between the reel and the customer. Another solution is shown in JP 51-36011.

Depending on the fleece passing from the reel to the customer, or on the fiber material becomes the gap A (Fig. 1, EP-A-432430) between the drum and the tongue fixed so that the air flow from the gap in directions of rotation II and III of the reel and customer is distributed in a certain proportion. With cotton fibers of approx. It must be 25 to 30 mm smaller so that the tongue can block the air currents leads from the gap in the direction of the customer 2 to the transfer of the fleece in front Support drum on the customer. In contrast, with synthetic fibers of approx. 38 mm and longer, which should pass to the customer more easily than the short ones Air flow to a greater extent in the direction of rotation II of the drum.

The tongue 4 has a foot part 6, which is fastened to a support 8 by means of screws is, which in turn is firmly connected to a machine frame part 9 at a foot end is. The tongue is adjusted with screws 7, which are in slots 10 in the foot part 6 are performed. EP-A-432430 is not concerned with the question of access to the screws 7. Because of the sheathing of the card, which is necessary for a modern Machine is essential, access to the parts to be adjusted is difficult and at least requires that the sheathing in the lower area of the drum beforehand must be removed.

Furthermore, an adjustment device is from the prior art according to FIGS. 3 and 4 known, which is built into the applicant's card C50. The tongue 4 is on one End arranged on a so-called convertible top segment 14, this segment forms an element of the corresponding drum shield, as described in more detail below is explained with reference to FIG. 5. The segments 14, each provided on one side of the card are used to carry roof elements, e.g. from US 5142742 or EP-A-431482 can be found. In the area of the tongue is the segment 14 divided into two legs 11, 12, where their adjustment takes place. The adjustment takes place by means of two screws 30, 40. The screw 30 comprises a first part 30A, which is screwed into a threaded bore in the leg 11 and with a locking nut is provided. The part 30A serves as a bearing surface for the second part 30B, which is shown in FIG a threaded hole in the leg 12 is screwed. Part 30B is used for Spreading the legs 11 and 12, which are designed to be elastically bendable. Screw 40 serves as a fastening or clamping screw.

The tongue 4 is by means of a separate screw (not shown) on the lower leg 12 attached. The gap A to be set is between the tongue 4 and the cylindrical surface 1A of the mounted on the drum (not shown) Set. The adjustment with screw 30 causes a displacement of the lower one Leg 12 and thus also the tongue 4 with respect to the drum surface 1A. The gap A in FIG. 4 is thus adjusted at one end. It's on the other end the tongue provided the same arrangement, so that the gap A below the Drum roll across the entire working width of the drum using the two adjustment devices can be adjusted.

This setting is disadvantageous. One is access to each adjustment screw 30B and clamping screw 40 more difficult, since these are tightened below the convertible top segments 14 or must be solved. The segments 14 are through the side walls of the frame and these walls cannot be dismantled, only around the Adjust gap. The adjustment is therefore a lot of trouble. You have to go with it Calculate incorrect settings. The setting is very good for optimal carding important, i.e. in many cases you work sub-optimally.

If screw 30B is screwed in too much, it creates plastic (permanent) deformation, which may no longer allow a correct setting. Furthermore, the Clamp screw 40 deform leg 12.

The invention (aspect 1)

The object of the invention in its first aspect is an adjusting device for a card, the adjustment of which is simplified. This task will solved with the features of claim 1. The arrangement can be made in this way that access from the outside of the drum shield is guaranteed.

However, the invention also enables a simplified assembly of the adjusting device.

Embodiments of the invention have the advantage that access to the adjusting screw is simplified because this is turned on by the drum shield. Likewise is fixing the setting e.g. simplified with a lock nut of the adjusting screw, because the mother can lie on the drum shield.

Another advantage of a preferred embodiment is that access to the Tongue fixing screw i.e. to the screw, with which the tongue on the thigh attached, is simplified because this screw through an opening in the drum shield is easily accessible with a tool.

State of the art for the guiding element

Fig. 1 und 2

eine aus der EP-A-432430 bekannte Zunge,

Fig. 3 und 4

eine andere bekannte Zunge, die in der Karde C50 der Anmelderin eingebaut ist,

Fig. 5

schematisch in Seitenansicht eine Wanderdeckelkarde, z.B. die Karde C50 der Anmelderin,

Fig. 6

schematisch eine Seitenansicht von Teilen eines Kardengestells,

Fig. 7

einen Bereich eines Trommelschildes in der Unterkardierzone,

Fig. 8

einen Teil (den sogenannten Verdecksegment), der am Trommelschild in der Unterkardierzone befestigt ist,

Fig. 9

eine schematische Darstellung zur Erläuterung der Montage von der Verstellschraube in einer ersten, relativ einfachen Variante nach der Erfindung, wobei diese Variante sich zur Erklärung des Grundprinzipes der neuen Einstellvorrichtung eignet,

Fig. 10

im Querschnitt ein Detail aus der Anordnung nach Fig. 7 in einer bevorzugten Lösung der Einstellung nach der Erfindung,

Fig. 11

eine weitere vorteilhafte Modifikation der Anordnung nach Fig 10.

Embodiments of the invention will now be explained with reference to the examples shown in the drawings. It shows:

1 and 2

a tongue known from EP-A-432430,

3 and 4

another known tongue built into the applicant's C50 card,

Fig. 5

schematically in side view a revolving flat card, for example card C50 from the applicant,

Fig. 6

schematically a side view of parts of a card frame,

Fig. 7

an area of a drum shield in the sub-carding zone,

Fig. 8

a part (the so-called convertible top segment) that is attached to the drum shield in the sub-carding zone,

Fig. 9

1 shows a schematic illustration to explain the assembly of the adjusting screw in a first, relatively simple variant according to the invention, this variant being suitable for explaining the basic principle of the new adjusting device,

Fig. 10

in cross section a detail from the arrangement according to FIG. 7 in a preferred solution of the setting according to the invention,

Fig. 11

a further advantageous modification of the arrangement according to FIG. 10.

Figures 1 to 4 are explained in the context of the explanation of the prior art Service. The figures mentioned are not discussed in more detail below.

FIG. 5 shows a revolving flat card 100 known per se, for example the card C50 by the applicant, shown schematically. The fiber material is in the form of dissolved flakes are fed into the filling shaft 102 by a licker-in 103 (also called "Briseur") adopted as a wadding and as a largely open and conveyed cleaned material to a drum 104 (also called "drum"). The drum is driven so that it is on its own axis in the direction indicated by the arrow. The fiber material forms on the cylindrical, with a surface (not shown) of the drum 104 Fleece that is in the "main carding zone" (between the drum 104 and a revolving cover set 105) is carded, with both short fibers and finer dirt particles removed and nits dissolved or removed. The revolving covers are from a traction means and move around pulleys 106 in the opposite direction Direction of rotation of the drum 104, or in the same direction.

Fibers from the nonwoven fabric located on drum 104 are taken from a pick-up roll 107 removed and in a consisting of different rollers The outlet section 108 is formed into a card sliver 109. This tape is from one Tape storage 110 stored in cycloidal turns in a transport can 111.

The present invention is concerned with the design of the so-called "Sub-carding zone", i.e. with the drum section between the pickup roller 107 and the licker 103, and in particular with the transition zone drum / take-off roller. It is known that this transition is particularly delicate because can not be clearly predetermined whether a fiber on the drum with the Drum continues or detaches from it and combined with the removed fleece. As has already been explained with reference to FIGS. 1 to 4, it is therefore known To provide tools in the transition zone that are able to take the conditions in to influence the transition zone. It is important that the tool is adapted can be to adjust the ratios and that continuously during the Operation the set conditions over the entire working width of the transition zone (approx. 1 m) are observed.

FIG. 6 schematically shows a side view of a card frame with a substructure 112 and a drum shield 113. The substructure 112 comprises two side walls 114 (only one of which can be seen in FIG. 6), each of which has an upwardly directed support surface 115 offer. The assemblies, which are supported on this support surfaces 115 which contain working elements (such as drum 104, licker 103, etc.). In FIG. 6 only the assembly comprising the invisible drum 104 is indicated, since the other modules play no role in the invention.

The drum shield 113 includes a hub 116, in which the axis 117 of the drum is rotatably mounted. The hub 116 is in one piece with a plate-shaped wall 118 cast, the various reinforcing ribs protruding outwards 6, for the sake of clarity only the ribs 119 are shown, those in two Skip support elements 120. The elements 120 sit snugly on the support surfaces 115 and they are attached to the side walls of the base 114. On the other On the side of the card is the second drum shield, a mirror image of that Shield 113 arranged. The edge portion 121 of the wall 118 of each drum shield serves for fastening or positioning various elements that are connected to the Cooperate directly or indirectly in the processing of the fibers, i.e. extend over the working width of the drum. In the main carding zone e.g. is the Edge portion 121 provided with a so-called flex bend (not shown), which as Serves as a sliding surface for the revolving cover in their workplaces - see e.g. in this context EP 787841 from 2.2.96. In the sub-carding zone the edge section 121 is provided with the so-called convertible top segment 14 (FIGS. 3 and 4), which is used to fasten the aforementioned elements. The segment 14 extends over the entire sub-carding zone, since apart from the tongue 4 (FIG. 3) must wear different top elements (e.g. elements 50 according to US PS 5142742). The following description only deals with a part of the drum shield 113, namely area 122 (FIG. 6) in the sub-carding zone on the take-off roller (not shown in Fig. 6).

The area 122 is shown isometrically but still schematically in FIG. 7. How one as can be seen is the outside of wall 118 (i.e. the side that also during remains accessible to the user during operation) between the ribs 119 and subsequently provided at the edge part 121 with a recess 123. In this recess 123 are adjustable elements according to the invention.

In the now preferred arrangement, the convertible top segment 14 is designed as an arc and recorded in a receiving groove, which is in the edge section 121 in the sub-carding zone provided but is not visible in Figures 6 and 7. The attachment of the bow 14A on the shield 113 is carried out by means of two bolts 126 which are mounted in respective threaded bores in lugs formed in one piece with the bow 14A 125 can be screwed (see also Fig. 9). The bolts 126 pass through one each Opening in the bottom of the receiving groove, the opening being close to the take-off roller mouths in the recess 123 (Fig. 7). The corresponding bolt 126 extends differ from its approach 125 to a rib 124 (Fig. 7) which acts as an anchor for serves the bow. The arrangement of the recess or anchoring rib is also in close to the licker-in (not shown in Fig. 7), so that the two fastening bolts 126 can be attached to the sign in the same way. Accordingly, the bolts 126 are very easily accessible for adjustment units without dismantling convertible top parts or the like.

The bow 14A is largely designed as a rigid structure. The setting of the bow 14A opposite the drum is therefore determined by the bolts 126, the arc 14A having a predetermined radius of its outer surface 14B is provided. The convertible top elements are attached to this surface, but this is here is not described because it does not play a role for the invention in and of itself.

In the area of the doffing device 107 (FIG. 5), the bow 14A has an end part in the Form of an elastically bendable arm 12A. The arm 12A is initially with the same radius as the stiff part of the bend 14A, but subsequently bent inward (biased) such that a tongue carried by arm 12A would strike against the cylindrical outer surface 1A of the drum when attaching the bow 14A, if the countermeasures described below had not been taken. The bias of the arm 12A is shown in Fig. 9 by the broken line of the Armes 12A shown. The arm 12A would take up this "dashed position" if he wasn't prevented from doing so.

The striving of the arm 12A inwards is limited by a stop which is by the end of an adjusting screw 32 is formed. The screw 32 is in a continuous Threaded hole screwed into the edge section 121 (see also Fig. 7) of the shield is provided, in such a way that the threaded bore is radial to the shield 113 between the recess 123 and the aforementioned groove in the Border stretches. The radial position of the stop (i.e. the outer end screw 32) can therefore be turned by rotating the screw relative to its bore can be changed, once a position is set by a lock nut 33 can be fixed.

The tongue, not shown in Figure 9, is still at the end, i.e. on arm 12A attached to the bow. The tongue could be fastened in principle using fasteners similar to the screw 40 in FIG. 4. Such a solution would be but disadvantageous in combination with the new adjustment because it has some advantages of Adjustment itself does not have. There are therefore preferred solutions to the problem the tongue attachment are described below with reference to other figures.

The adjustment in the embodiment according to FIG. 9 thus differs from the arrangement 4 (i.e. according to the closest prior art) in that the upper leg 11 of the convertible top segment according to FIG. 4 has been omitted, so that the adjusting screw 32 (Fig. 9) with the shield (instead, according to Fig. 4, only with the Convertible top segment) works together. This has made it possible to use the screw 32 to perform through the edge portion 121 of the shield and it from the outside to make the shield accessible.

Another difference is that the adjustment is no longer due to spreading the leg 11, 12 (Fig. 4) by means of a screw, but rather by the adjustment of a stop, the element supporting the tongue (the end section 12A, Fig. 9) is biased against this stop. The one acting on the arm 12A Contact pressure in the area that comes into contact with the stop is therefore (for a predetermined contact area) limited by the bias. This pressure can chosen in relation to the properties of the material of the arm 12A that there is no significant deformation of the contact surfaces. The preload itself can be predetermined depending on the dimensioning of the arm 12A become.

It is not necessary to omit the upper leg 11 shown in FIG. 4 and the bow harness to achieve the benefits of accessibility. It would be in principle possible, the outer end of the screw 32 in this way with a lower leg 12 4 to connect that when adjusting the screw 32 of the leg 12th would still be bent. Such a solution is not excluded from the scope of protection, but has serious disadvantages compared to the solution according to FIG. 9. The arrangement according to FIG. 9 itself is only the beginning for the preferred solution which is explained below with reference to FIG. 10.

In Fig. 10 the tongue 4A is also shown, this tongue in the form of a Continuous casting profile is formed. The profile 4A is secured by means of a fastening means 34 (in 10, a screw 34) on the underside or outside of the arm 12A assembled. The screw 34 extends through a bore (without thread) in the arm 12A and it is freely rotatable in it. When removing the tongue 4A, the screw 34 is held on the arm 12A by a hood 36, the Hood 36 itself is attached to arm 12A by a screw 37 such that it fits in groove 130 when installed. The hood 36 is provided with an opening 39, to allow access to the screw head and the bottom 131 of the Edge section 121 is provided with a corresponding opening 41 so that access is guaranteed during operation. The opening 41 can be provided with a closure 35 so that they are not contaminated by (e.g.) flight or even during operation is clogged. The arrangement according to FIG. 10 is also clear with the conventional one Tongue construction can be used.

1. Die Schraube 32 wird in einer vorbestimmten Stellung gebracht.

2. Das Verdecksegment (der Bogen) 14A, und somit die davon getragenen Verdeckelemente werden im Unterkardierbereich durch Verdrehen der Muttern 126A (Fig.10) eingestellt, Der Arm 12A steht auf der Schraube 32 auf, ohne dass die Zunge 4A die Mantelfläche der Trommelgarnitur durchstösst.

The effective degree of penetration depends on the current position of the stop, which is formed before by the end of the screw 32. You can therefore proceed as follows during assembly:

1. The screw 32 is brought into a predetermined position.

2. The convertible top segment (the arch) 14A, and thus the convertible top elements carried by it, are adjusted in the sub-carding area by turning the nuts 126A (FIG. 10). The arm 12A stands on the screw 32 without the tongue 4A touching the outer surface of the drum set penetrates.

With screw 32, the tongue is now by deforming (bending) the arm 12A adjusted, which sets the conditions in the transition area drum / customer become.

Fig. 11 basically shows the same elements as Fig. 10 and they are again if possible, the same reference numerals have been used. In this case, however, is additional a spring assembly 38 between the head of the screw 34 and the one facing it Surface of the end portion 12A is provided. The spring assembly is the Contact pressure between the tongue 4A (or 4) and the underside of the section 12A (especially near the screw 34). In other words, the pull the screw 34 in the fastening point becomes independent of the tightening torque, that is exerted on the screw. This allows the tongue to move during operation in its longitudinal direction (i.e. in the direction of the working width of the Machine) without expanding due to distortion from the selected adjustment deflect. Such an expansion of the tongue must be expected since it is subjected to the entire width of the heated air of the carding area.

The present invention is by no means limited to the explanations given only as examples the setting and assembly limited.

The tongue 4 has a nose 5, about which (according to EP-A-432430) more or less large air overflow in the direction of rotation of the customer 2 should arise. The direction and intensity of the overflowing air could be adjusted by adjusting the "opening angle" α and can be changed by changing the distance A. No matter which adjustment device the same arrangement is provided at both ends of the tongue. so that the gap A below the drum roll over the entire working width of the drum can be set as precisely as possible using the two adjustment means can.

Claims (11)

1. Setting apparatus for influencing the air flow conditions in the main drum/ doffer roller zone of a card, in which arrangement the setting apparatus is arranged on the main drum support member and comprises setting means for changing the flow conditions, characterised in that the setting means (32, 12, and 12A respectively) is brought in through the main drum support member in such a manner that it is accessible from the outside of the main drum support member (shield).
2. Setting apparatus according to claim 1, characterised in that on the main drum support member (shield) a cover segment (14) is provided, on which cover elements can be mounted, and that the setting apparatus is arranged on the cover segment (14).
3. Setting apparatus according to claim 2, characterised in that the apparatus comprises a tongue (4; 4A), which is fastened on the cover segment (14).
4. Setting apparatus according to claim 3, characterised in that access for fastening the tongue (4; 4A) on the cover segment (14) through the main drum support member (shield) is ensured, in particular through an opening (41).
5. Setting apparatus according to one of the claims 2 through 4, characterised in that the setting means (32, 12, and 12A respectively) comprises an elastically bending part (12, 12A) of the cover segment (14), in such a manner that setting can be effected by bending the part (12, 12A).
6. Setting apparatus according to claim 5, characterised in that the cover segment (14) is laid out as an arc, which with the exception of said elastically deformable part is rigidly stiff.
7. Setting apparatus according to the claims 5 or 6, characterised in that the elastically deformable part (12A) is pre-tensioned radially inward.
8. Setting apparatus according to one of the preceding claims, characterised in that the setting means (32, 12 and 12A respectively) comprises an element (32), which is arranged adjustably on the main drum support member (shield).
9. Setting apparatus according to the claim 8 and one of the claims 5 through 7, characterised in that the adjustable element (32) serves as a stop for the bendable part (12, 12A) of the cover segment (14).
10. Setting apparatus according to claim 3, characterised in that the tongue (4, 4A) is fastened on the cover segment (14) using a fastening means (34).
11. Setting apparatus according to claim 10, characterised in that the fastening means contains a spring pack.

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