FR2887264A1 - Card e.g. nonwoven card, machine for manufacturing e.g. cotton type natural fiber based nonwoven voile, has component mounting and dismounting system with carriage mounted on rails to guide carriage in translation with respect to ground - Google Patents

Abstract

The machine has a card component e.g. false floor, mounting and dismounting system (2) comprising a moving carriage (20) which is mounted on two parallel guide rails (21). The guide rails permit to guide the carriage in translation with respect to the ground and are positioned under cylinders of the card e.g. cotton card. The carriages comprise castors (201) and rests on the guide rails by utilizing the castors. The system has a carrier unit (22) which is adjustable in height and supports the card component.

Description

SYSTEM FOR MOUNTING / REASSEMBLING AN ELEMENT OF

  This invention relates to the field of the textile industry and relates to a novel system facilitating the assembly or disassembly of heavy and bulky card elements, such as false bottoms or cylinders. BACKGROUND OF THE INVENTION a card, especially during maintenance operations of the card.

  PRIOR ART In a usual manner, a card comprises a plurality of cylinders, at least one carding cylinder (commonly referred to as a large drum) which is provided on its periphery with an aggressive lining and on the periphery of which carding members are mounted at the top. In operation, the fibers are introduced at the entrance of the card in the form of a fiber mat, and are individualized at the periphery of the carding cylinder (carding action) by the combined actions of the carding members and the trim peripheral of the carding cylinder.

  Generally, and by way of non-limiting example, carding members are composed of one or more successive carding groups, each carding group being composed of a first roller commonly called worker associated with second roller commonly called stripper or sweeper. In another embodiment, the carding members may be in the form of a fixed upper work element (also called carding plate) having a plurality of fixed carding points at the periphery of the carding cylinder.

  In order in particular to prevent the fibers which are recycled to the periphery of the carding cylinder from leaving the cylinder by falling by gravity to the ground, it is customary to mount, in the lower part of the carding cylinder, a fixed curved fairing, commonly referred to as a false bottom, which is positioned in close proximity to the cylinder. This false bottom also makes it possible to prevent external elements (dirt, dust, etc.) from polluting the fibers at the periphery of the carding cylinder. More generally, false bottoms can also be mounted in the lower part of any card roll which carries fibers in the lower part. For example, it is customary to implement a false bottom on a communicating cylinder ensuring for example a function of transfer of fibers between two successive carding cylinders.

  As part of the maintenance of a card, it is necessary to dismantle regularly and then reassemble each false bottom of the card.

  These disassembly / reassembly operations of false funds of a card are justified by various causes.

  It is necessary to regularly clean the false bottoms of the card in order to remove the deposited fiber dust, and for this purpose to provisionally remove each false bottom from the card.

  Also, as part of the maintenance of a card, it is necessary to check the good condition of the cylinders and their peripheral lining, as well as the adjustment distances between cylinders. To be able to more easily access these organs of the card and to check them, it is necessary beforehand to temporarily remove each false bottom.

  In addition, the condition of the false bottoms of a card should be regularly checked. For this purpose we dismount each false bottom, we clean it and if necessary when the false bottom is damaged, it is repaired or replaced.

  To date, these operations of mounting / dismounting false funds of a card are manually performed by at least two people who must move each false bottom relative to the card frame by wearing it. Given the significant weight of each false bottom, these operations are so far painful and long. The difficulty of these operations is all the more important that the working width of the card, which is in practice the length of a false bottom, is important, To try to overcome this drawback, it has already been proposed to implement works false funds that are wholly or partially mounted pivoting relative to the frame of the card. Thanks to this technical solution, it is possible to separate each false bottom pivoting from its cylinder without having to wear it, the false bottom remaining supported by the card frame. However, this solution is not completely satisfactory for at least two reasons. On the one hand, in the open position of the false bottom, access to the cylinder is more limited and less easy compared to a solution in which the false bottom is completely removed. On the other hand, this solution does not replace or send to repair a false bottom damaged.

  OBJECT OF THE INVENTION The object of the present invention is to propose a new technical solution which makes it easier and more difficult to assemble / dismantle a heavy and / or voluminous card element, such as a false bottom. .

  SUMMARY OF THE INVENTION The solution of the invention is based on the implementation of a mobile maintenance trolley which is equipped with carrying means which are designed to support the card element and which are adjustable in height.

  The invention thus has for its first object a system for mounting or dismounting a card element, such as in particular a false card bottom, which system comprises a movable carriage equipped with carrying means, which are designed to support said element of the card. card, and which are adjustable in height.

  The invention finds its application primarily in the assembly or disassembly of false funds of a card, but is not limited to this single application. The assembly / disassembly system of the invention may be more generally used to disassemble or mount any heavy and / or bulky card element and may for example and non-exhaustively also be used to assemble or disassemble a cylinder or roll of card , or an element (crossbar) of the frame of a card.

  More particularly, the invention comprises the following additional and optional features, taken separately or, where appropriate, in combination: the system comprises means for guiding the truck to the ground; the load-bearing means comprise rotatably articulated support arms; the carrying means comprise at least one pair of carrying arms, each pair of carrying arms forming an X, one of the carrying arms of one pair being articulated in rotation with respect to the carriage, and the two carrying arms of the same pair being articulated in rotation relative to each other; the carrier means comprise actuating means for articulating the carrier arms between a folded low position and an extended position of height (H) adjustable; the actuating means comprise at least one pneumatic cylinder.

  The invention also has for its second object a card equipped with a aforementioned system for mounting or dismounting a card element, such as in particular false card funds, the carriage of the assembly / disassembly system being movable below cylinders of the card.

  The third object of the invention is the use of the above-mentioned assembly / disassembly system for mounting and / or dismounting an element of a card, and in particular (but not exclusively) a false card bottom or a card roll or an element of the frame of the card.

Short description of the fictures

  Other features and advantages of the invention will appear more clearly on reading the detailed description below of a card for the manufacture of a nonwoven, said card being equipped with a mounting / dismounting system. false fund made according to a preferred variant of the invention. This detailed description is given by way of nonlimiting and non-exhaustive example of the invention, and with reference to the accompanying drawings in which: - Figure 1 is a schematic representation, seen from the side, of a card equipped with a false bottom mounting / dismounting system of the invention; FIG. 2 is a perspective representation of an example of a false card bottom; Figure 3 is a side view of a preferred embodiment of a mounting system / disassembly of the invention, the support arms being folded down; Figure 4 is a top view of the assembly / disassembly system of Figure 3; - Figure 5 is a schematic representation of the mounting / dismounting system of Figures 3 or 4, the support arms being in the deployed position and supporting the load of a false bottom card; - Figure 6 is a schematic representation of the mounting / dismounting system of Figure 5, the support arms being folded in the low position against the carriage; FIG. 7 is a diagrammatic representation of a card roll equipped with a false bottom and of the mounting / dismounting system of FIGS. 3 and 4, the carrying arms being in the deployed position and positioned relative to the false bottom of this cylinder. ; - Figures 8 to 11 show the main successive steps of disassembly operations of the false bottom of the main carding cylinder of the card of Figure 1.

detailed description

  There is shown in the accompanying figures a card 1 which comprises a set of cylinders 10 to 17 supported by a carrier frame B. The set of cylinders of the card 1 is known per se and will therefore very briefly described. It comprises from the inlet to the card outlet: a food roll 10, a breaker cylinder 11, a first transfer cylinder 12, still commonly called a communicator, a first rotary carding cylinder 13, more commonly called a front end, a second communicating cylinder 14, a second carding cylinder 15, commonly called large drum, sail forming cylinders 16 and 17 (for example rollers of the doffer or condenser type) each forming a card output. The card 1 also comprises, in the usual manner, a plurality of satellite carding units which are mounted at the periphery and in the upper part of the front end 13 and the large drum 15. In the accompanying figures, for the sake of simplification, these carding units do not are not represented. Each carding group is for example composed of a brush roll associated with a worker roller.

  This card 1 makes it possible to manufacture in parallel two non-woven webs, for example based on synthetic fibers of the polypropylene, polyethylene, ... type, and / or natural fibers of the cotton type, and / or of viscose-type artificial fibers. ...

  Some cylinders of the card 1, including in particular the carding cylinders 13 and 15 are, in a manner known per se, equipped in the lower part with false bottoms F, such as for example that illustrated in Figure 2. Also, the communicating cylinders 12 and 14 may advantageously be equipped with a false bottom F. The false bottom F of Figure 2 is given by way of non-limiting example, it being specified that there are other possible structures to achieve a false bottom.

  In the usual way, a false bottom F has a geometry and dimensions adapted to the card roll with which it is associated. In particular, the false bottom extends longitudinally over the entire length of the card roll and has a curved surface S whose radius of curvature is substantially equal to the radius of curvature of the outer surface of the roll. With reference to FIGS. 8 and 9, the false bottom F is intended to be fixed in a removable manner to the support frame of the card, by any appropriate fastening means, and for example by means of a fastening system comprising threaded rods. T and nuts E, below the card roll (carding cylinder 15 in the example of Figures 8 and 9), so that the curved surface S of the false bottom is positioned nearby and covers a portion of its periphery the card cylinder. Thanks to this false bottom F, the fibers which are transported by this cylinder on its periphery, and which escape in the lower part of this cylinder under the effect of gravity, are advantageously retained by the false bottom F. The card 1 of the accompanying figures is equipped with a system 2 of the invention which allows a quick and effortless assembly and disassembly of false funds F of the card. This system 2 for mounting / dismounting the false bottoms illustrated in the accompanying figures is made according to a preferred embodiment of the invention.

  It should be emphasized that all the cylinders of the card 1 of the attached figures is given by way of example only, and is not limiting of the invention. The false bottom mounting / dismounting system 2 of the invention, of which a preferred variant embodiment will now be detailed, can be implemented on any cardboard structure equipped with at least one false bottom F. In particular, the system 2 of assembly / disassembly the invention can be implemented not only on any type of nonwoven card, but also on any other type of card, including wool card or cotton card.

  The system 2 for mounting / disassembling false bottoms comprises a mobile carriage 20 mounted on two parallel guide rails 21, for guiding the carriage in translation relative to the ground.

  More particularly, the carriage 20 is equipped at its base with rollers 201 and rests on the two guide rails 21 via the rollers 201.

  In the context of the invention, the rollers 201 and the guide rails 21 may be replaced by any equivalent means for making the carriage 20 movable and to guide it in translation relative to the ground.

  With reference to FIGS. 1 and 7, the two guide rails 21 are positioned under the rolls of the card, and extend, parallel to the machine direction MD of the card 1, between a zone Z1 upstream of the card which is free of any cylinder, and a zone Z2 under the cylinders of the card which extends at least to the last cylinder of the card 1 equipped with a false bottom F, that is to say in the illustrated example the second cylinder Also, the largest lateral dimension L1 of the carriage 20 (dimension measured in the direction perpendicular to the guide axis of the rails 21) is less than the length L2 of the rolls of the card. It follows that the carriage 20 can be moved between the upstream zone Z1 released from any cylinder and the downstream zone Z2 located under the rolls of the card 1, being guided in translation by the rails 21 and without encountering any obstacle with the support frame B. On the carriage 20 are carried carrying means 22, which are designed to support a false bottom card, and which are adjustable in height.

  More particularly, in the preferred embodiment illustrated in the accompanying figures, these carrier means 22 comprise two pairs of X-shaped identical bearing arms 220. One of the two carrying arms of each pair X is articulated in rotation by relative to the carriage 20 according to a first axis 220a, the other carrier arm being slidable relative to the carriage 20 (FIG. 5 / double arrow D). The two carrying arms 220 of the same pair are further articulated in rotation relative to each other along a second axis 220b, substantially parallel to the first axis 220a. The second axis 220b is preferably substantially central with respect to the support arms 220. In this way, the support arms 220b can be articulated in a low position (FIG. 6) by being folded against the carriage 20 and in an extended position (FIG. ) which depends on the mounting height H relative to the ground of the false bottom F. In the folded position (Figure 6), the support arms 220 advantageously occupy a small footprint in height (height h relative to the ground in Figure 6 below at height H of Figure 5).

  Also, in this folded position of FIG. 6, the lateral space requirement L3 of the support arms 220 is maximum but remains smaller than the lateral space requirement L1 of the carriage 20.

  To adjust the height with respect to the ground of the two support arms 220, the system 2 comprises actuating means 221 which are embedded on the carriage 20, and which, in a general way, on the one hand enable the support arms to be pivoted 220 along their axes of rotation 220a and 220b, and secondly allow to operate the two support arms 220, when they support the load of a false bottom F, so as to bring them in the folded position against the carriage 20 In the particular embodiment illustrated in the figures, these actuating means 221 comprise, for each pair of carrying arms 220 in X, a pneumatic cylinder 221a controlled by an air circuit. The jack 221a acts on the carrier arm 220 articulated in rotation (axis 220a) with respect to the carriage 20, and makes it possible to deploy or fold the X formed by the pair of carrying arms 220.

  Referring to Figures 2 to 7, each carrier arm 220 is equipped at its upper end with a roller 220c mounted free to rotate. Also, the false bottom F comprises four U-shaped grooves G which each extend from one of the lateral faces of the false bottom F along the longitudinal axis A of the false bottom F and over a limited length. (I). These grooves are intended to receive the rollers 220c of the support arms 220, and allow positioning of the support arms 220 relative to the false bottom F. The implementation of the mounting / dismounting system 2 which has just been described to disassemble the false Bottom F of the carding cylinder 15 of the card 1 will now be detailed with reference to FIGS. 8 to 11. Disassembly of the false bottom F FIGURE 8 The carriage 20 (and its onboard carrier means 22) is moved to the plumb with the cylinder carding 15.

  In the particular case of the card of FIG. 1, the rolls are discarded downstream of the carding cylinder 15 by sliding towards the rear of the card (arrow F ') the corresponding part of the support frame B, so as to disengage the false bottom F of the carding cylinder. This operation of clearing the false bottom is not mandatory in the context of the invention, and is justified only for certain types of card.

  FIG. 9 The pneumatic cylinder 221a is actuated so as to deploy the support arms 220 upwards, until the rollers 220c of the arms are housed in the corresponding U-shaped grooves G of the false bottom F. The false bottom F is detached. of the support frame, by removing in the particular example illustrated the fastening nuts E. Once completely detached from the carrier frame B of the card, the false bottom F is carried only by the deployed carrying arms 220. Figure 10 actuates the cylinder pneumatic 221a so as to lower the carrier arms 220 and bring them in their folded position of Figure 6, which allows to lower the false bottom F by bringing it to the carriage 20. Figure 11 It moves the carriage 20 supporting the false bottom F towards the rear of the card into the upstream zone Z1 clear of any cylinder.

  The false bottom F can then if necessary be cleaned and / or repaired or replaced.

  Also, it is possible to access under the carding cylinder 15 without its false bottom F to carry out the usual operations of maintenance, cleaning, checking and adjustment of this cylinder.

  Installation of the false bottom F Once the maintenance operations are completed, the false bottom F is repositioned with respect to the carding cylinder 15 by using the carriage 20 and its carrier means on board.

  For this purpose, the false bottom F is positioned under the carding cylinder 30 by means of the carriage 20.

  The pneumatic cylinder 221a is actuated so as to mount the false bottom carried by the support arms 220 and position the false bottom with respect to the carding cylinder 15.

  The false bottom F is fixed on the frame B of the card by replacing the fixing nuts E. The support arms 220 are lowered by folding them against the carriage 20. The cylinders are repositioned, if necessary, downstream of the carding cylinder. 15.

  The system 2 for mounting / dismounting false bottom is ready for a new use.

  The displacement of the carriage 20 on the guide rails 21 can be obtained manually, the operator pushing or pulling on the carriage 20. In another variant embodiment, it is also conceivable to provide means for actuating the carriage, such as for example a linear jack, allowing an operator to control the movement of the carriage 20 during assembly / disassembly of a false bottom.

  The system 2 for mounting / disassembling false card bottom can be used in the same way to proceed with the assembly / disassembly of the false bottom of other cylinders of the card, and for example the false bottom of the front train 13, the false bottom of the first communicating cylinder 12, or the false bottom of the second communicating cylinder 14.

  The mounting / dismounting system 2 is mainly used during maintenance operations of the card. But it can also be advantageously used during the initial operations of mounting the card.

  Also, the mounting / dismounting system 2 can be used in the same way for mounting or dismounting any other type of element of the card, and for example a cylinder or roller of the card or a member of the support frame of the card. that a cross.

Claims (9)

  1. System (2) for mounting or dismounting an element of a card, characterized in that it comprises a movable carriage (20) equipped with carrying means (22), which are designed to support the element of the card, and which are adjustable in height.   2. System according to claim 1 characterized in that it comprises means (21) for ground guidance of the carriage (20).   3. System according to claim 1 or 2 characterized in that the carrier means comprise support arms (220) articulated in rotation.   4. System according to claim 3 characterized in that the carrier means comprise at least one pair of carrier arms (220), each pair of carrier arms (220) forming an X, a carrier arm (220) of a pair being articulated in rotation relative to the carriage (20), and the two support arms (220) of the same pair being articulated in rotation relative to each other.   5. System according to one of claims 1 to 4 characterized in that the carrier means (22) comprise actuating means (221) for articulating the support arms (220) between a folded low position and a deployed position height (H) adjustable.   6. System according to one of claims 1 to 5 characterized in that the actuating means (221) comprise at least one pneumatic cylinder (221 a).   7. Carde characterized in that it is equipped with a system (2) for mounting or dismounting a card element according to one of claims 1 to 6, the carriage (20) being movable below the cylinders of the card.   8. Use of the assembly / disassembly system referred to in one of claims 1 to 6 for mounting and / or disassembling an element of a card. 1. 3   9. Use according to claim 8 characterized in that the element of the card is one of the elements of the following list: false bottom (F), cylinder, roller, element of the frame of the card.