DE1610289A1 - Folding device - Google Patents

Description

Dr. ~ lng. Herbert Moser Patent attorney

Karlsruhe ffltogvttrrie 2ο 1610289

Applicant; Henry. John Weir, Sedbury, UK

FaI t before r i c Ii tion

The invention relates to folding devices, and in particular s αι.! Folding laundry items that can be spread flat, such as laypeople, Towels and the like. The main field of application of the invention is the folding of cloths, and the term "cloth" »the following used in the description is intended to be all equal Include various treatable items.

It is known to guide a cloth which is to be ironed in a laundry ironer, for example, on a conveyor belt through a folding device, which executes one or more folds along lines-transverse to the conveying direction of the cloth and then to guide the cloth through a transverse folding device, which has a or several folds transversely to the folds already made. · ■ - "■ '*' ■ '.

JJi e currently known folding devices; the hinduroh (; r et end cloths after two ancestors: In the first method •, / ii-'i 'Hh . leading edge of the cloth between a pair of holding

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clamps clamped, either before or after the conveyor belt achieved. The retaining clip !! are then raised whereby the remaining part of the cloth is transported on the goalkeeper conveyor belt. Then the holding clasps are opened, whereby the previously held edge falls down and is usually placed on the rear edge of the cloth, which thereby becomes Is folded in half. In the second folding process, the cloth is folded along a given line in the transverse direction (halfway along, if the cloth is half-spread should be!), whereby the edge is guided between two opposing, counter-rotating U-rollers, which pull the cloth between yourself.

Each of these procedures has! Laughs hurry, which are particularly troublesome appear when the cloth has already been folded once, so that its thickness becomes noticeable. The more folds in the previous one Work processes have been carried out, the more these disadvantages appear. In the transverse folding stage if a towel is generally desired to be folded, which was folded three times in previous operations and thus has a uniform thickness that corresponds to the eight times the cloth thickness. In this case join The first method of the Kachteil on that the retaining clips grasp the front edge evenly with difficulty, v / eil these is too thick, and the process also becomes difficult to control, because it is necessary to compensate for the noticeable difference in length with regard to the sheet pieces at the fold. Therefore, it follows that the end folds of a towel, which is already folded by the first-mentioned method, inaccurate

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are executed. On the other hand, an attempt will be made to use an already folded Tuqh. ..with a fourfold, "eightfold or sixth": niaclien same thickness to be folded again, namely iiD.ch ueii in the previous writing - second procedure, ■. so it tends, 'that the jerk of the orphans rotating against each other In a folding device of this kind, the cloth, uurca ien Drucl: ζ v. ^R isehen den. Vialsen liindurcli-jesogen and for that reason. Can. inpreßdruc-h cannot be orniedri ^ t below a certain value. ■ ..'- ■■ '■. \ V

A gate stand of the present invention is an improved one Folding device, which essentially - for folding towels is suitable, the solion in / preceding work steps .insbesonclore have been folded several times, but without limitation to this special application.

As the invention contains a capability arrangement ■ a conveying device, which has an essentially horizontal end roller or guide, - as well as at least one conveyor belt, which is driven around the end roller or guide so that a The upper run of the conveyor belt is created, and the conveyor belt is so arranged that a cloth is placed on its upper course and trai ^ orted by this without touching it from above, that further a free space is arranged above the Oberla.uf, which it allows the cloth to be placed in such a way and without touching contact is transported, also hanging means - for hanging a to be folded cloth in front of the conveyor belt, in parallel

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in relation to the conveyor belt, v / o this moves the end roller or the guide and also means which can be placed against a hanging cloth along a provided horizontal fold line and place the cloth on the upper run in such a way that it is on the conveyor belt with the fold line first is properly transported. Hit this device is that? El • processing without detecting the cloth corners and ο line pressure on the folded towel conducted exercise.

The means for hanging up the cloth preferably include Means for progressively lowering the sheet in relation to the end roller or guide, and the Litt el for action on the cloth include a timer, which then triggers the action when the intended fold line is in the intended place. "Usually, but not necessary, the fold line is half the length of the cloth.

The means for acting on the cloth preferably include a rectangular plate that extends across the width of the conveyor belt extends and -in the xiuhelage in a vertical plane in the area of the hanging cloth, namely on the side facing away from the conveyor belt, this rectangular plate being suspended on a horizontal edge in such a way that it can be pivoted, that it can be pivoted in the direction of the conveyor belt when the action on the cloth is to be triggered. The rectangular one Plate is preferably articulated so that it can pivot at its upper edge and is driven by a known pneumatic drive, which engages at its lower edge at the given / time deflected. The time switch can be in the most varied! (Eise be constructed, but preferably of the embodiment of

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UK patent application. Ir. 15 543/64, which a mechanical timer describes in the time switch. elements at speeds proportional to the transport. speed of the cloth to be folded are driven. The movement of these time switch elements is dependent on this controlled by spaced switches, which respond to the passage of the leading edge and the trailing edge of the cloth.

As already noted above, the device according to the invention is then advantageously used, if the previous folds of the cloth have already been carried out. Accordingly, practice of the invention is preferable part of a cross folder. Such Cross folding device preferably contains a longitudinally divided Table, and the folding device is below a dividing recess arranged in this table so that they have a cloth, which through the dividing recess in the direction of gravity passes through, can take up. The cloth is placed on the table so that its longitudinal line of symmetry is immediate is above the dividing recess, and a preceding one Folding is achieved by pinching the cloth along this longitudinal line of symmetry reached between awei mutually rotating rollers below the dividing recess. The cloth will then pulled down between the counter-rotating rollers, which in this case the means for hanging the cloth form. The swiveling folding plate is attached below the rollers.

ordered, and also the conveyor belt on which the Tuen is to be placed is provided below the table and It extends to one side from the center of the table, this one

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Conveyor belt is preferably slightly inclined downwards against the conveying direction, so that the folded articles in one appropriate altitude.

The cross folding device can have a number of parallel Be equipped folding tracks, one or more, the same or similar folding devices are provided and the Table has a number of recesses arranged at a distance in the longitudinal direction transversely to its width, each of which iir. The center of a corresponding path. The conveyor belts of the various folding devices can preferably be arranged so that transversely folded towels from one to the other conveyor belt and delivered to a common delivery table.

In one embodiment of the invention, the transverse folding device have three folding devices in a symmetrical arrangement on the table, making an adjustment to either one web of tissues which, prior to transverse folding, occupy the full width of the transverse folding device, or two webs of Tissues that extend over half the width of the transverse folding device before the transverse folding is possible. There are switching organs provided, which disable the outer folding devices for operation as a one-way machine and which accordingly make the middle folding device ineffective for operation as a double-lane machine.

The timer, which is included in the British patent application * Ur. 13 543/64 requires two switching stations. ' * In the above arrangement according to the invention, at

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Use of such a timer, preferably one Switching station formed by a micro switch arrangement, which is arranged above the Irish, and by the Presence of a cloth "located on the table" switched is .. Uenii the back parts of the cloth "from the opposite- ' a ^ ider rotating rollers are sucked rom the table, loosens This micro switch arrangement switches the desired time according to the passage of the rear edge of the cloth. the other time switch status is preferably "from a photo line anorunj formed below 'the lobes or guides on the conveyor belt. The leading edge of the cloth can be below the Hang down the end roller or guide, and this affects the Photoselle arrangement in such a way that the required switching process is triggered in the timer device «, Der mechanical drive of the timer can be direct or are indirectly removed from the drive of the counter-rotating bolts. In this way, the mechanical drive of the ■ Timer with the actual transport speed of a cloth. "-", "-.---, .-." '- "-

The invention is intended below with reference to the attached Drawing to be described; show it;

Fig. 1 is a plan view of a transverse folding device,

which includes the features of the invention "-. Fig. 2 is a sectional front view of a transverse folding device according to Fig. 1, -: 3 is a plan view showing the drive of the time switch mechanism in the case of a cross folding device. Fi- "1. and 2 shows. ; - -.

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4 is a plan view of a photocell arrangement, as it is used as a second time switch station in a cross folding device according to FIG. 1,

Fig. 5 is a sectional view corresponding to Fig. 2, which "shows the first stage of cross-folding,

FIG. Β is a view similar to FIG. 5 in the second Folding step

7 is a schematic, sectional front view

a multi-lane transverse folding device with the i. Features of the invention.

With reference to FIG. 1, the folding device illustrated therein includes a table 1, which has two half-parts which are separated by a slot recess 2 in its central area are. Above the table 1 and in contact with its surface is a conveyor, which consists of a number of separate Conveyor belts 3 is composed. The conveyor belts 3 are moved over the table 1 by a drive roller 4 in the direction of the arrow emotional. At the delivery end of the table 1, the conveyor belts 3 pass in a transverse slot 5 through the surface of the table The towels to be folded are placed on this table by a donation efördervorrichtung an upstream folding machine (not shown in the drawing!) delivered, which this twice folds along lines across the direction of transport. Hence come the folded towels on the table 1 with a width which is greater than its length.

As soon as a cloth is placed on the table, the operating conveyor belts 3 on the table surface moved forward. The leading edge of the cloth comes first in contact with a pair of micro switches, whose Switch arms from below through the table in slots at item 6

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reach through and then with a microswitch, the trigger arm from below the table through a slot at Pos »? reaches through. The circuit arrangement for driving the End roller 4 is chosen so that the drive is maintained is as long as the switching arms from pos. 6 by the presence a cloth, and that this drive immediately stogtv when the trailing edge of the cloth exceeds the area indicated at 6 provided slots, provided that the cloth the The switch arm at pos. 7 is still actuated. In this way the cloth is stopped in a position in which its trailing edge is between pos. 6 and 7 is located. It also appears useful in the event that such cloths are put on Take precaution, which one to the folding mechanism not have more adjustable overlengths. There are two more to this Microswitch with switching arms at pos. 8 at the end of the table provided, and if this microswitch from the leading edge of the cloth must be actuated before its rear edge reaches Pos.β releases, the folding device is inhibited, and this cloth can can now be removed from the folding table by hand.

If the cloth is not too long for the intended cross-fold is, i.e. if it is not longer than the slot recess 2, the transport belts 3 are stopped as described above. The center line of the cloth, 'which is then just above the Slot recess 2 is located by an air flow that starting from an outlet line 9, pressed downwards. This outlet line 9 is in the same direction-directly above the Slot recess 2 arranged. The outlet line 9 is on Perforated on the underside and one not in the drawing illustrated «valve can be connected to a compressed air collecting tank 10, which is tubular and extends over the

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Width of the table extends. The compressed air collecting container 10 is in turn connected to a compressed air source via a connecting line 11.

As can best be seen from Fig. 2, are located below the Schiitzausnahm 2 a pair of counter-rotating rollers 12, in whose clamping edge the center line of the cloth through the Air flow from the outlet line 9 is blown. The rollers 12 then pull the cloth through with the center line first.

At a certain distance below the rollers 12 is located on one side of the center line a conveyor belt 13, which has a number of individual sub-belts around an end roller 14 on the inside and around another end roller 15 on the outside. Above the upper run of the conveyor belt 13 there is a free space which makes it possible to place a cloth on the upper course in such a way that those as free of contact with parts above should be described. The conveyor belt is slightly downwards inclined so that the wipes are dispensed at a corresponding height will. However, it is ensured that the inclination and the material of the conveyor belt are selected in such a way that that the towels are transported in any case, ohm that under the influence of their own weight on the upper reaches Slip occurs. In connection with the conveyor belt 13 is an auxiliary transport roller 14a disposed on its surface is provided with a friction coating, which prevents slipping of the towels, and with the end roller 14 over a 1: 1 chain gear drive 14 is connected. The auxiliary transport roller In this way, 14a supports the transport of the wipes on the conveyor belt and prevents them from moving backwards

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Slipping »The speed of the conveyor belt 13 and the Circumferential speed of the auxiliary transport roller 14a agree the peripheral speed of the rollers 12 match. '...

Between the rollers 12 and the conveyor belt 13 is on the side viewed from the center line, which is opposite from the conveyor belt, a folding plate 16 in a rectangular shape provided, which extends over the full width of the conveyor belt extends. Its length corresponds to the slot recess 2, which is adapted to the maximum permissible cloth length. The folding plate 16 is pivotable in the area of its upper edge 17 stored and in the area of their lower edge with the piston rod 18 of a pneumatic drive 19 coupled * The end of the pneumatic drive 19 * which from its piston rod 18 is turned away, in turn, has a pivotable bearing compared to the base frame of the cross folding device by a horizontal one Axis up. The control of a control valve for the pneumatic drive 19 is designed such that'die piston rod 18 is pushed to the outside when switched on, and thereby the folding plate 16 in its pivotable position -

how
tion so that / this is shown in Fig. 2 by dashed lines.

This movement is triggered at such a point in time which is half the length of the cloth that is already through the rollers is folded, the lower edge der.Faltplatte 16 reached and is then released onto the conveyor belt 13 .. The conveyor belt 13 pulls the remaining length forward and causes thereby the desired final fold. The folding plate 16 is while in the position 16a held so that they the upper part of the cloth on the conveyor belt. The trigger signal to retract the folding plate 16 in its rest position is of a photocell arrangement 25 (described below!) given ^

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If the lower part of the cloth has the photocell assembly 25 releases by being sucked upward from the conveyor belt will.

A corresponding timing of the pneumatic drive 19 * can be achieved by a timer of the type described in the British patent application Mr. 13 543/64 as well as in of the German patent application amtl.As: B 81 267 VIIa / 8d is described. Such a time switch device contains oin Pair of mechanically driven engagement pieces which can be coupled to drive pieces in a correspondingly adapted manner with one engaging piece being driven at twice the speed of the other once engaged. The mechanical drive of the time holding device is with the Anirieb connected, which transports the cloths. The time switching is effected by two switching stations, soft in are arranged one behind the other at a corresponding distance in the transport direction of the cloth. The arrangement works with two signals, one by passing the trailing edge of the cloth in the first switching station and the other by passing the leading edge in the second switching station is triggered. The clutch of the slower egg piece with its associated drive is established when these two signals appear for the first time, and the coupling of the faster engagement piece with its associated drive takes place by the second occurrence of these two signals. The switching process is triggered when the faster engaging piece triggers a fixed switch at the end of its movement path. It is possible in this way to prevent delays occurring in the overall device connected to the timer compensate that the total length of the path of movement on the

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faster movable engagement piece / for example by an end position adjustment, "is adapted accordingly".

Figure 3 shows the way in which in the embodiment -der. present invention, the drive required for the side switch is removed. The end roller 14 of the conveyor belt 13 has at one end a shoulder with a belt pulley 20 and a drive belt connected to it drives a further belt pulley 21 _s which supplies the timing device enclosed in the housing 22 with the mechanical input variable. The SnO.rolie 14 has the same diameter as the rollers 12 and is in such a connection with these that a drive with 1: 1 translation (not shown in the drawing) is achieved. Therefore, “the drive of the further belt pulley 21 is directly synchronous with the downward movement of the cloth through 'the bolls' 12, this movement being dependent on the drive speed of the rollers 12.

The first switching station of the time switch mechanism described is formed by two micro switches 23 (see FIG. 2), which at the same distance from the center line on both sides of the compressed air tank 10 are attached above the table. The micro scarf t he 23 have switching arms 24, which are from the bodies of the Microswitch go out and through slots provided in the table "The presence of the cloth on the table below the -Kikro switch ensures that the switch arms 24 are above the table level rest on the cloth, and this switches off the contacts of the connected microswitches. The microswitches 23 are connected in series, and as soon as the Trailing edge of the cloth driven by the action of the rollers,

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the switching arms 24 happened, these switching arms 24 can be in their collapse associated slots. When both switching arms 24 have assumed this position, a switching occurs which one of the two signals for the timer is triggered.

The second of the switching stations, which responds to the length of the leading edge of the cloth, is formed by a photocell and lamp assembly 25 which is located in the middle below the end roller 14. FIG. 4 shows a print of this arrangement, from which it can be seen that it is a lesson arrangement. A lamp 26 redirects a light beam 27 in the direction of the light, and only when a tube - shown at item 2C in FIG. At this point, the other of the named Ό egg! ¹ -en Sijn ^r il = j generated and thereby networked the Zeitsc-ialtwerk in a position to determine the length of the cloth which is folded by the rollers 12, and for. adjusted time to trigger the action of the pneumatic drive 19.

FIG. 5 shows a view of the folding device; Rait a towel 30 in the first stage of the transverse fold. Las cloth vrelcl.es between the rollers 12 by the air flow from the ^ uslaßleitung plugged 9 was, is advanced downwardly from this to dec "ilfstransportrolle-14a over. FIG j 2 ^ ei _o t dio -Uchüte stage of the cross-folding, in which the folding plate 16 was moved forwards by the timer at the adjusted time. As a result, the longitudinal edge 31 of the double-folded cloth 30 was placed on the conveyor belt. The cloth is moved forward by the conveyor belt and at a delivery table (not in the drawing

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shown) on the side of the cross folder. For ease of illustration, the cloth is as in front of the The first transverse fold is shown to have only one thickness, although it is sometimes, as explained above, several times the thickness. .-.-. "■ · - .." -. ■■ "" ■■■ · .. "

Figure 7 shows a front old schematiseh Mehrbahnenquerf direction "of the invention * These Mehrbahnenquerfaltvorrichtung .besitzt a folding table 32, which in many ^details: corresponds to the table 1 of the figures 1 and _2: but has a working width of about 3 m and three Längsausnehmungen33 Below each longitudinal recess 33 there is a pair of counter-rotating verochub rollers 34 and a conveyor belt 35, the arrangement being such that a transverse folding station of the type described above is located at each longitudinal recess 33, read "parts one Air flow for triggering the first transverse fold is, however, an arrangement with insert strips vox-seen, with a fold-in strip 36 at 37 de ^ i't pivotally articulated in each FaItstation that it is a dashed position 36ü when folding the cloth between the feedίο11en 34 can take. A further pneumatic drive 33 is provided in each case to drive the folding strip 36. In addition, the second transverse folding in each folding station is not carried out by a pivotably hinged folding plate, but by an air flow from a line 39 designed as an air distribution pipe, which extends over the Width of the conveyor belt. The auxiliary transport roller 14a in connection with each conveyor belt is not provided in this embodiment.

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station used (shown sealed in the drawing).

The three conveyor belts 35ε, b, c run all nit same speed, which corresponds to the peripheral speed of the "V'orschubrollen. 34: They are arranged so, · that the gaps between adjacent conveyor belts located in the horizontal plane sufficient in the folding stations, a Tue ¹ · "to stretch out between the conveyor belts, but little more. I lit · .this arrangement, a cloth, which is folded down on your conveyor belt 35c, for example, can be transferred from this to the conveyor belt 35a and from there on to the conveyor belt 35b and finally to the output table 40. The rigidity of the cross-folded cloths is ensured the possibility of handover at the gap between the conveyor belts.

The cross-folding device can either be used as a one-way machine for cross-folding an article up to approx. 3ei width -, τ: · ^; or as a. two-lane machine in which "in each of the cello :, independent lanes, articles of about 1.5 πι width irl.sr, can be found. In the former case, the single lane is indicated by λ ir used. In the second case: ·: ·. die 'be-iäon Bsilxen durc ":. 3 and G, and only in conjunction with the left and right folding station benutc "." Icroei is a switch ζν.τ .aiin- selecting the operating mode is provided which either the äuJerc .i-folding stations or the average Faltstatio.n shuts down cedarfsweise.

^ s results from the preceding representation Ci. '' Oi ^ ■ • * characteristics of the invention not to the details and from £ iüirn: r ;; sformen bejolviviikt £ .u;: d _e

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: It is possible, for example, to arrange alternative means for generating the air flow or for the swiveling folding plate, -ifi the hit of the cloth, deflecting it and placing it on a conveyor belt -Λpole ^ s. For example, a plate or rod arranged essentially parallel to the overflow of the conveyor belt can be provided, which can be moved parallel to the overflow and initiates the required folding within the specified time. Instead of one of the two end rollers 14 or 15, a stationary guide for the conveyor belts can be provided, with the input coming from the remaining shaft. ;

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Claims (1)

Expectations 1β) Folding device, especially for towels and flat ones that can be spread out Items of laundry using at least one conveyor belt, characterized in that that the cloth to be folded (30) is suspended in front of and parallel to a conveyor belt (13), and that a hanging one Piece of the cloth on the conveyor belt (13) depositing deflection means (16,39) is provided, which longitudinal a provided horizontal fold line against the cloth ('3O) and this on the upper run of the conveyor belt (13) so that the cloth is picked up by the conveyor belt (13) and transported with the folding line first. 2.) Folding device according to claim 1, characterized ge k e η nzeich, that the suspension of the piece to be folded (30) is designed so that the piece to be folded is continuously lowered and hanging over an end roller (14) or guide, and that when deflected along the Fold line of the bottom hanging part can be placed over the end roll or guide. 3o) folding device according to claim 2, characterized in that that the deflection means (16, 39) from a time switch mechanism (22) as a function of the transport the hanging cloth (30) is triggered, ^ΒΑε > ORlGWAL 2 0 9811/0430 4) Folding device according to one of the preceding claims, thereby g e k e η η ζ e i c h η e t that the Auslenkernent physically as essentially rectangular Folding plate (16) ..- is formed, which extends over the Width of the conveyor belt (13) extends and a queuing 'position in "vertical plane directly in the area of the suspended, to be held cloth (30) assumes, and that this folding plate (16) on the away from the conveyor belt (13) Side of the cloth to be folded (30) along a horizontal one Edge (14) is pivotably articulated and with a drive · element (19) for deflection in the direction of this conveyor belt (13) is equipped. 5o) folding device according to claim 4 e η H-Z ei ob η e t that the folding plate (16.) to .ibrer upper edge (17) is pivotably mounted. 6.) Folding device according to claims 4 and 5, d ad u r e Ii characterized in that the folding plate (16) with a pneumatic drive (19) is connected. Tc) folding device according to claim 2, d a d u r c h g β ~ indicates that the take-up end roll (14) the conveyor belt (13) is preceded by an auxiliary conveyor roller (14a) in the conveying direction » 8.-) Folding device according to claim 1, characterized in that the deflection means from at least one nozzle of a line (39) exiting air flow is ο "BAD ORIGINAL" 3 _ - "20981 1/0430 ..." ■ .. 9.) Cross folding device using a folding device according to one of the preceding claims 1 to 8, d a d u raw characterized in that a table (1) with at least one slot recess (2) is provided, and that the folding device is attached below the slot recess (2) of the table (1) so that it passes through the slot recess (2) picks up penetrating cloths (30). 10.) Cross folding device according to claim 9, characterized that to accommodate the fold line of a on the table (1) lying cloth, which through the Slot recess (2) is pulled down, a pair of mutually rotatable rollers (12,12) below the Slit recess (2) is provided, which pull the cloth to be folded in its fold line and continuously downwards' promote, these mutually rotatable lobes (12, 12) the suspension means of the cloth (30) for the following Form folding process. 11.) Cross folding device according to claim 10, characterized that a timer (22) for Actuation of the deflecting means (16, 39) with respect to the one to be folded Cloth (30) is constructed in such a way that it is on the The passage of the trailing edge of the cloth in a certain position responds to the passage of this trailing edge in another position further forward in the transport direction of the cloth and also on the leading edge of the cloth, and that a microswitch above the table (1) and arranged to be actuatable by the cloth, which has a switch responsive to the cloth in said position forms, as well as a photocell arrangement (25) maintain BATH ORIGINAL 2098 11/0430 ^L - 4 - XA the counter-rotating rollers (12,12), which one the switch that responds to the cloth in the other position forms, 12 ·) Cross folding device according to one of the preceding claims, since you rc hgeke η η ζ ei ch η et that a plurality of parallel folding tracks (A ₁ B, C.) Is provided, which have one or more other similar folding devices, and that the table (1) has a corresponding plurality of sliding recesses (33) along its width, each lying in the central region of the associated track (Α, Β, Ο. 13 *) transverse folding device according to one of the preceding claims, thereby geke η η ζ e i s h η e t that the conveyor belts (35a, b, c) of the various folding devices like this are arranged that the sheets folded across in the individual webs each in Biohtung on a common Output table (40) are handed over. ; 14 ·) Cross folding device according to claim 15, d a d u'r c Ii characterized that on the folding table (1) in a symmetrical transverse position three folding devices (Α, Β, Ο such are arranged that optionally a web (A) of towels, which before the transverse folding of the full width of the table (D occupy, can be edited or two lanes (B, C) of Towels that are half the width of the Tables (1) occupy, and that a switching device is provided, which accordingly selectively the outer folding devices in the one-way mode * »machine or the central folding device in the operating mode as "switch off two-lane engine, ' BAD ORIGINAL 209811/0430 Empty soap