DE60110603T2 - DEVICE FOR ASSEMBLING AND REMOVING FROM ONE OF TWO SUCCESSIVE BOWS MOVING IN A TRANSPORT DIRECTION - Google Patents

Abstract

Apparatus for separating and moving away from each other two independent consecutive sheets (1) movable in a given feeding direction (A), which comprises separating means which are stably arranged in the end-of-travel zone of the outward path (11) and can be actuated by means of associated actuator means (62, 63) for insertion/extraction of the separating finger (31) between/from the two consecutive sheets and relative movement away thereof in the longitudinal direction.

Description

The The present invention relates to a device for separating successive leaves, the straight in a feed direction are movable and for moving a sheet away from it subsequent sheet in this feed direction.

in the The field of paper technology are machines for the production of paper napkins known in which the napkins from a continuous strip are produced, which in the longitudinal direction (parallel to the feed direction) folded and a pair of oppositely rotating cylinders supplied which is equipped with means, this strip in the opposite Direction to create a continuously folded arrangement, which is guided in the direction of a fixed blade, which bisects the folded arrangement in the direction of the longitudinal axis, making two rows of folded napkins, which are separated from each other are and which run parallel along the machine arise.

It It is also known that two rows of napkins in two different Pack must be subdivided each of which has a specific and defined number of napkins which is removed from the molding apparatus and to a packing device for wrapping this led Need to become.

Around the number of napkins forming a single pack on the Starting point from the two cylinders to be able to count, two consecutive To separate packing and then move away the latter so that there is a gap between this is formed to remove one pack at a time intends to use a device that is in use based on slider-mounted fingers, which so procured are that they are parallel to the feed direction the napkins along a substantially annular path glide, which has an exit area and a return path area having.

At the Beginning of the exit area and then directly to the folding cylinder are Devices are provided which, after counting the number of napkins press the slide, this being encountered transversely becomes, so an insertion of the finger along the career of the napkins is caused.

These Fingers run from this moment translatorisch either through a associated Carrying device or through the napkins themselves to a predefined position, where the fingers, which in reality consist of two parts - d. H. from a part which is attached to the slider, and from a Part which can perform rotational movements with respect to the first part - itself Separate the two subsequent packs of napkins move to separate, the first of these packs by associated gripping devices is removed for unloading.

Devices of this kind are for example off EP 0 294 675 and WO 9728076.

Even though These machines fulfill their function, these machines have certain disadvantages stemming from their respective construction, and consist of a large one Number of parts requiring precise operation and are prone to significant wear because of the relative friction resulting in high production and assembly costs and downtime of facilities for the necessary Maintenance.

Additionally own the known devices have specific limitations with regard to the possibility to reduce the minimum number of napkins per pack, so it is not possible the thickness of the finger in the feed direction below a certain limit to reduce.

The The technical problem that arises is therefore a device for the To provide separation of two consecutive sheets, wherein the leaves a part of a variety of leaves are that a predetermined translational in the feed direction Perform movement, and for moving one sheet of paper from the following sheet so that a gripping by associated Distance devices allows is, with the device has a high precision, a simple Construction has and both their wear and that of the moving Components and the minimum number of sheets per pack reduced which separate them compared to the known devices can.

in the It is also a requirement of this task the device damages the leaves at the moment of separation and / or in the relative motion of two leaves of successive ones Packing away from each other reduces, and that even with existing ones Machines can be used without having to specially customize them have to.

These Technical problems are inventively by a device for Separation and moving away from each other by two independent following sheets in a predetermined feed direction solved according to the features of claim 1.

Further Details can by the following description of a non-limiting embodiment of the invention, including the accompanying Drawings in which

1 shows a perspective view of the device, which is arranged in the direction of movement of the cylinder pair for folding paper napkins;

2 a plan view of the device according to 1 shows;

3a . 3b . 3c show a plan view of a section of the zone for the separation of the napkins during the subsequent steps on arrival and the introduction of the separating finger;

4 a section along the plane IV-IV in 3c shows;

5 Figure 12 shows the plan view of a section of the relative separation movement zone away from two successive napkin groups;

6a . 6b . 6c show a plan view of the zone of relative separation movement during the associated working sequence;

6'a . 6'b partly schematic sections along the planes VI'a-VI'a and VI'b-VI'b of 6a respectively. 6b demonstrate;

7 a plan view of the device for the movement of the slider, which carries the separation finger shows;

8a - 8d a plan view of the recovery sequence of the slider having the separating finger show.

As shown, the device according to the invention is on a napkin folding machine 1 arranged, which after having a pair of counter rotating cylinders 2 Having come from a multiply folded sheet, leaving it along a support surface 4 in the feed direction A to the fixed blade 3 is moved so that it is cut by the following longitudinally in two rows F1 and F2 of folded napkins, which are arranged separately in packages P1 ... Pn containing a certain number of napkins and are moved away from each other, so that the insertion of a subsequent gripping device (not shown), which removes any pack that unloads the forming machines and loads the packing machine.

bands 4a are also on the surface 4 ( 2 ) to initiate the feeding of the two rows of napkins in the feed direction.

The device according to the invention ( 2 ) has a carrier plate 10 on, through which the exit path 11 , parallel in the feeding direction "A" of the napkins 1 (hereinafter referred to as "longitudinal direction" for short) is defined, with the longitudinally aligned edges of the path 11 inward through a tightly mounted channel 10a and outward through a section of the first band 12 are limited, which endlessly around two roles 12a . 12b are driven, which are driven by a motor with a sufficiently high transmission (not shown), which connect the band with the shaft of the driving motor M.

A second volume 12 is also on each of the plates 10 arranged, which runs along and parallel to the first, so that the two parallel and facing each other areas of each of the bands 12 altogether a second way 13 which is central and parallel to the first define.

For simplicity, and as it becomes clearer in the following, the way lies between the band 12 and the leadership 10a and make an exit path while the path 13 between the two bands 12 lies and the way back the slider 30 forms, each of which has a finger 31 carries, which shows substantially in the direction perpendicular to the feeding direction of the napkins (hereinafter referred to as "transverse direction").

As in 4 shown, owns the finger 31 essentially a C-shaped cross-section.

Every band 12 has elastically deformable elements inside 12c which allow the band to be pressed against the slider, which on the other side against the longitudinally oriented guide 10a pushes, this being the area 10 form, so that the friction between the belt and slider causes the latter is driven by the first.

The 1 and 2 further show an alternative embodiment of the device to the slider 30 Restrict along the return path: In this embodiment, the second band 12 , which is the outermost with respect to the napkins, through a fixed side wall 112 replaced, against which the slider by the impact force of the elastic device 12c , which are in the band 12 stays in contact.

In the initial zone of the lead outwards the areas ( 3a and 4 ), where the zone directly adjoins the folding cylinder 2 connects are slides 30 attached, which are in a receiving position, and devices 40 . 50 provided to the finger 31 between two successive sheets forming the last sheet of a package Pn and the first sheet of the subsequent package Pn + 1 ( 4 ).

More specifically ( 3a - 4 ) is the device 40 from a cylinder 41 , which on a plate 10 and at the bar 41a attached, each slide 30 translationally in the direction parallel to the feed direction from said receiving position (end of the return journey 13 ) is moved to a holding position for insertion between the napkins, this finger 31 in a seat 2a the folding cylinder 2 is introduced, but outside the transport path of the napkins 1 leaving the cylinder.

This holding position is defined by a moving end position through an end portion of the guide 10a certainly ( 3a ).

The device 50 for inserting the finger 31 between the napkins consists of a plate-like part 51 ( 4 ), which translationally parallel to the longitudinal direction in the interior of an associated guide slot 51a which is in the plate 10 is arranged, is movable; this plate-like part 51 is driven by a connected device - for example consisting of a cylinder 52 , which can be activated by appropriate devices - which with the cylinders 2 communicate a signal as soon as the given number of napkins 1 reached, who have to form a pack.

On the other side are at the end of the exit route ( 5 ) Devices 60 arranged, with which a pack Pn can be moved by the subsequent packing Pn + 1 relative to each other, and devices 70 for gripping the slider 30 from the exit route and introducing this along the return journey 13 which ends in the bend of the receiving zone where the operation described below begins.

More specifically ( 7 ) the devices consist of moving two consecutive packs from a pointer 61 which is arranged in a transverse direction with respect to the feed direction of the napkins and with a flange 61a connected with a slide block 61b communicating in the transversal direction on guides 61c and in the longitudinal direction on guides 61d slides; this slide block is moved in two directions, in the transverse direction and in the longitudinal direction, by associated pistons 62a . 63a with a corresponding number of cylinders 62 . 63 , That's why the pointer will 61 through the piston 63a driven in both directions, so that it is moved parallel to the feeding direction of the napkins, while the moving in both directions piston 62a the pointer 61 translated in translation, in the transverse direction of the feed direction.

The device for receiving the slider 30 for the train this from the exit route and the introduction in the return route consists of a pair of cylinders 71 . 72 ( 5 ), which are transversal or parallel to the feed direction of the napkins 1 are aligned.

The piston 71a of the transverse cylinder 71 owns a magnet 71b who, when this with the slider 30 is attracted by, attracted by, and during recoil, moves it back in the transverse direction away from the position of the end of the exit path to a position with the piston 72a of the cylinder 72 forming a line which, from the cylinder, presses the slider in the return path, which is between the two aligned return zones of the rotating belts 12 (or band 12 / solid sidewall 112 ), which by acting on them tension with the opposite sides of the slider 30 transport the latter to the receiving zone at the end of the return journey.

• – Davon ausgehend, dass die Schieber 30 in einer Reihe mit der Aufnahmezone (3a) angeordnet sind, wird der Zylinder 41 angetrieben und gegen einen Schieber 30 in die transversale Richtung (3b) gedrückt, wobei dieser in die Halteposition des Fingers 31, der in den speziellen Kanal 2a des Zylinders 2 eingeführt ist, ausgerichtet wird, jedoch außerhalb der Laufbahn der von dort kommenden Servietten 1.
• – Ist die Zählung erfolgt, aktiviert eine Kontrollvorrichtung den Zylinder 52, der den Schieber 30 in Längsrichtung bewegt, sodass der Finger 31 in die Laufbahn der Servietten 1 zwischen der letzten Serviette (Ende der Zählung) des Packens Pn und der folgenden Serviette, welche die erste (Beginn der Zählung) des Packens Pn + 1 bildet, eingeschoben wird (3c, 4).
• – Von dem Moment an, in dem der Schieber 30 quer zwischen der Kontaktoberfläche 10a und dem Band 12 verharrt, werden die Servietten weiterbewegt, wobei sie auch durch die zugehörigen Laufbänder 4a bewegt werden, welche in den entsprechenden Lücken in der Oberfläche 4 sitzen (2).

The operation of the device is as follows:

• - Assuming that the slide 30 in a row with the receiving zone ( 3a ), the cylinder becomes 41 driven and against a slider 30 in the transversal direction ( 3b ), this being in the holding position of the finger 31 that in the special channel 2a of the cylinder 2 is introduced, but outside the career of coming from there napkins 1 ,
• - When counting has taken place, a control device activates the cylinder 52 who is the slider 30 moved in the longitudinal direction, so that the finger 31 into the career of the napkins 1 between the last napkin (end of count) of the pack Pn and the following napkin forming the first (beginning of counting) of the pack Pn + 1 ( 3c . 4 ).
• - From the moment in which the slider 30 across the contact surface 10a and the band 12 while the napkins are moved on, they also move through the associated treadmills 4a be moved, which in the corresponding gaps in the surface 4 to sit ( 2 ).

• – wenn das Ende des Ausfahrtswegs erreicht ist (5, 6a), wird der Schieber 30 mittels eines magnetischen Elements 35a, das sich auf einem am Zylinder 35 befestigten Kolben 35b befindet, welcher an der Oberfläche 10 befestigt ist, hochgehoben und in Kontakt mit einem mechanischen Ende-der-Bewegung-Punkt 36 gebracht; einmal in Kontakt mit dem Ende-der-Bewegung-Punkt signalisiert ein entsprechender Sensor die Anwesenheit des Schiebers 30, der den Zylinder 62 aktiviert, welcher den Zylinder 63 und deshalb auch der Zeiger 61 in Querrichtung bewegt (6a, 6'a), welcher, wenn er die quer ausgerichtete Ende-der-Bewegung-Position erreicht hat, wobei dies durch einen entsprechenden Sensor detektiert wird, einen Schlag des Kolbens 63 auslöst, der den Zeiger 61 in Bezug auf den Finger 31 vorwärts bewegt, welcher sich im Ruhezustand befindet, wodurch die Trennung der zwei aufeinander folgenden Packen bewirkt wird;
• – wenn eine Trennung nicht mehr nötig ist (8a–8d), d. h. die Packen durch die Greifvorrichtung entfernt worden sind, wird der Zylinder 71 aktiviert und, indem sein Kolben 71a zurückgezogen wird, der Magnet 71b mit dem Schieber 30 in Kontakt gebracht, wobei dieser durch den Kolben angezogen wird und ihm entlang des Rückfahrtswegs folgt (8b), wobei der Schieber in eine Position gebrht wird, wobei eine Reihe mit dem Rückfahrtsweg gebildet wird und in Kontakt mit einem Mitnehmer 10b kommt, der den Schieber zurückhält, während der Kolben 71a seinen Stoß fortsetzt und vom Schieber getrennt wird;
• – der Zylinder 72 ist aktiviert und zieht seinen Kolben 72a zurück, drückt den Schieber 30 in den Rückfahrtsweg 13 zwischen zwei sich gegenüberliegenden Bändern 12, die den Schieber in die Aufnahmezone drücken, sodass der Arbeitsgang erneut von vorne beginnen kann.

In this way, the slider 30 during the outward movement led to a jamming or the like, while also helping to keep the packs of napkins 1 are properly ranked;

• - when the end of the exit route is reached ( 5 . 6a ), the slider becomes 30 by means of a magnetic element 35a that is on a cylinder 35 attached pistons 35b which is at the surface 10 is fixed, raised and in contact with a mechanical end-of-movement point 36 brought; Once in contact with the end-of-movement point, a corresponding sensor signals the presence of the slider 30 who is the cylinder 62 activated, which the cylinder 63 and therefore also the pointer 61 moved in the transverse direction ( 6a . 6'a ) which, when it has reached the transversely oriented end-of-travel position detected by a corresponding sensor, hits the piston 63 triggers the pointer 61 in relation to the finger 31 moved forward, which is at rest, whereby the separation of the two successive packs is effected;
• - if a separation is no longer necessary ( 8a - 8d ), ie the packs have been removed by the gripping device, becomes the cylinder 71 activated and by putting his piston 71a is withdrawn, the magnet 71b with the slider 30 which is attracted by the piston and follows it along the return path ( 8b ), wherein the slider is brewed in a position, wherein a row is formed with the return path and in contact with a driver 10b comes, which restrains the slide, while the piston 71a continues its push and is separated from the slider;
• - the cylinder 72 is activated and pulls his piston 72a back, press the slider 30 in the way back 13 between two opposite bands 12 , which push the slider into the receiving zone, so that the operation can start all over again.

It is therefore clear from the above description how the elements which produce the relative separation movement of the two successive sheets are arranged in the zone in which the actual relative movement takes place, and that these are not continuous with the slider 30 be moved together, whereby small parts of complex machines and wear due to continuous movement along the circular path are avoided.

In addition will achieved by that, that the element for mutual separation movement in introduced the thickness of the finger can be, this two consecutive leaves can separate, this one guided is, resulting in a reduction of the device in the longitudinal direction which reduces the minimum number of napkins is reached, which form the pack to be separated, wherein the same time also a high reliability and repeatability of the work process and the likelihood of damage to the napkins is reduced.

Claims (31)

Device for separating leaves ( 1 ) movable in a straight line in a given feed direction (A), and for moving apart two independent successive sheets to allow removal of at least one pack of sheets by associated removal means, comprising: - an exit path ( 11 ) and a way back ( 13 ) which are parallel to the feed direction; Wherein at least one longitudinal side of the paths is driven by drive means ( 12 ), - release agent, which at least one slide ( 30 ) with one finger ( 31 ) which extends in a direction substantially transverse to the feed direction from the slider; - where the slider ( 30 ) is movable • along the exit route ( 11 ) from a cycle start position to the introduction between two consecutive leaves ( 1 to a travel end position to move the two successive sheets apart in the feed direction; • along the way back ( 13 ) from the motion end position to the cycle start position; - first resources ( 40 . 50 ) for actuating the slide ( 30 ) located in the cycle start area for inserting the finger ( 31 ) between two successive leaves; - Medium ( 60 . 61 ) to move the two successive sheets away from each other; - second means ( 70 ) for receiving the slider ( 30 ) from the movement end position of the exit route ( 11 ) and inserting the slider in the return path; characterized in that: the means ( 60 . 61 ) for moving apart two consecutive leaves a straight element ( 61 ) fixed in the travel end area of the exit route ( 11 ) is arranged and actuated by - actuating means ( 62 . 63 ) fixed at the movement end position ( 60 . 61 ) are arranged; for inserting / removing the straight element ( 61 ) between / from the two successive sheets and moving the straight element ( 61 ) inserted between two successive leaves, forward with respect to the finger ( 31 ) of the slider ( 30 ), which at the end of movement Po position, which causes the movement apart of the two successive sheets in the feeding direction. Device according to claim 1, characterized in that the means ( 60 . 61 ) makes linear movements to move the two successive leaves apart. Device according to claim 2, characterized in that the means ( 60 . 61 ) which cause the movement apart, a translational movement in the direction transverse to the feed direction for insertion of the straight element ( 61 ) between two consecutive sheets. Device according to claim 2, characterized in that the means ( 60 . 61 ), which cause the movement apart, a translational movement of the straight element ( 61 ) in a direction parallel to the feeding direction for relative disengagement of two consecutive sheets (Pn, Pn + 1). Apparatus according to claim 1, characterized in that the with the slide ( 30 ) connected separating fingers ( 31 ) has a C-shaped cross-section. Device according to claim 5, characterized in that the straight element ( 61 ), which causes the movement apart, has a thickness which is less than the thickness of the separating finger ( 31 ). Device according to claim 1, characterized in that the means ( 62 . 63 ) for actuating the straight element ( 61 ) are linear. Device according to claim 7, characterized in that the actuating means ( 62 . 63 ) Comprise elements which generate a transverse impact and elements which generate a longitudinal impact. Device according to Claim 7, characterized in that the elements which produce a transverse impact are made of a cylinder ( 62 . 62a ) consist. Apparatus according to claim 7, characterized in that the elements which produce a shock in the longitudinal direction, from a cylinder ( 72 . 72a ) consist. Device according to claim 1, characterized in that that the launching agent connected to a power-on sensor associated with the sheet counting devices connected is. Device according to claim 1, characterized in that the first means ( 40 . 50 ) for inserting the finger ( 31 ) are linear along the path of the two consecutive leaves. Apparatus according to claim 12, characterized in that the first introduction means ( 40 . 50 ) Elements ( 41 . 41a ), which produce a transverse impact, and elements ( 51 . 52 ) which generate a shock in the longitudinal direction. Apparatus according to claim 13, characterized in that the elements which generate a shock in the transverse direction, from a cylinder ( 41 . 41a ) consist. Apparatus according to claim 13, characterized in that the means which generate a shock in the longitudinal direction, from a flat piece ( 51 ) on an associated guide ( 51a ) a solid support plate ( 10 ) is movable. Device according to claim 1, characterized in that the introduction means ( 40 . 50 ) are connected to turn-on means connected to the sheet counting devices. Device according to claim 1, characterized in that the second means ( 70 . 71 . 72 ) for picking up the slides ( 30 ) from the movement end area of the exit route ( 11 ) are linear. Device according to claim 17, characterized in that the second means ( 71 . 72 ) Elements ( 71 . 71a . 71b ), which perform thrust in the transverse direction, and elements ( 72 . 72a ) which generate a shock in the longitudinal direction. Apparatus according to claim 18, characterized in that the elements which perform a thrust in the transverse direction, from a cylinder ( 71 . 71a ) consist. Device according to claim 19, characterized in that a magnet ( 71b ) at the free end of the rod ( 71a ) of the cylinder ( 71 ) is attached. Apparatus according to claim 17, characterized in that the means which generate a shock in the longitudinal direction, from a cylinder ( 72 . 72a ) consist. Apparatus according to claim 1, characterized in that the device on a support surface ( 10 ) is arranged. Apparatus according to claim 22, characterized in that the support surface of a surface ( 4 ) for feeding the sheets ( 1 ) is disconnected. Device according to claim 1, characterized in that the exit route ( 11 ) the slider ( 30 ) in the transverse direction through a guide ( 10a ) with the surface ( 10 ) and a band area ( 12 ) is limited, Apparatus according to claim 1, characterized in that the return path of the slide ( 30 ) in the transverse direction through a band area ( 12 ) and through a solid side wall ( 112 ) is limited. Device according to claim 1, characterized in that elastic means ( 12a ) for producing a shock in the transverse direction within the exit and return ribbons ( 12 ) are arranged. Device according to claim 1, characterized in that it comprises means for gripping the slider ( 30 ) which are arranged in the movement end region of the exit path of the slider and the latter in the feed direction from the exit of the exit path to a movement end stop (FIG. 36 ) can move. Apparatus according to claim 27, characterized in that the gripping means by a cylinder ( 35 ) are formed. Apparatus according to claim 28, characterized in that a member for gripping the slider ( 30 ) at the free end of the rod ( 35b ) of the cylinder ( 35 ) is attached. Device according to claim 29, characterized in that that the gripping element is magnetic. Machine for forming and folding in a feeding direction (A) movable leaves, characterized in that it comprises at least one device Claim 1 for separating and moving apart of two consecutive following sheets in the feeding direction (A).