DE1460852A1 - Control device for controlling machine work processes - Google Patents

Description

Patent attorney Karlsruhe Etilingerstraße Ze A.

Applicant: British Laundry Machinery (Jo. Ltd., Middlesex / England

Dr. Expl

Control device for controlling mechanical

Operations

The invention relates to control devices and arrangements for controlling machine operations in relation to an article carried by a conveyor.

A preferred field of application of the invention can be found in the control of the folding operations in folding machines, which have a movable conveyor device for receiving the laundry items dispensed from a platter. In such machines the laundry items (usually;

00 * 818/0295

flat pieces such as cloths, towels, sheets, etc.) two principal liethodes aged. At the first i.iethode the front edge of the article is clamped between a pair of jaws, either "before or after that front edge reached the conveyor. The jaws are then raised to remove the remainder of the article from the Conveyor can be transported forward. After a certain distance the jaws and the jaws open The held edge of the order can fall down, which is usually the case this in the way that it falls on the rear edge of the article, which is thereby folded in half.

The second method of folding consists of tucking the article along its width at a predetermined outline (this yuer line is halfway along, tails a fold should be achieved in half). The folding edge is then pushed between two contacting folding rollers, which pull the article folded through their rotational movement.

ienn the conveyor is moving quickly and when for the folds have an accuracy of about. 1 f ° is required there are difficulties in controlling the .din clamping jaws or the Umschlagelementes. The mechanical work processes can be done by photoelectric devices or mechanically with the help of nilKro switches on the conveyor path of the conveyor device and triggered depending on the passage of the article which is to be folded. In general however, it is uncommon to arrange these devices at the point where the folding process is to be carried out.

90981 S / 0295

For this reason it seems desirable to provide the switch arrangement in the movement path in front of the work station and a delay between the actuation of the holder and the start of the workflow for the folding movement. ;:. the use liierfür unknown Verzörorun ssTe'uervorrichtuii ^ ⁱ ~ en uenutzen electronic and electromechanical 'components which · relatively complicated and störunjsonfälli-; Nina ier addition, there is further disadvantage of not directly · on .lie Transnortgeschwindirkeit of Artikels'bezogenen delay. If, therefore, no complicated prerequisites are met in order to ensure that a constant machine speed is achieved regardless of different loads, errors occur.

The characteristic of the invention "is seen in that at least one drive part which can be driven synchronously with the transport movement of the article is provided, in connection with a coupling part which can be pressed against the periphery of the drive part and thereby with a speed dependent on the peripheral speed of the drive part is drivable that switching means are also provided, with the aid of which the drive part can be coupled to the associated coupling part at a reference position depending on the passage of the article, and that finally a switch element is attached which is in operative connection with the coupling part stands, and is switched from this to trigger the mechanical work process. _: ,

If the second method of folding is the length of the

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folded article is unknown and may change from one to the next, it is necessary to die'necessary delay according to the length of each to specify the article to be folded. In a further embodiment, the present invention aims at a simple device indicate which takes on this additional function without it being necessary to adjust the transport speed of the Stabilize conveyor in unusual Liaße.

According to this development of the invention is a control device for controlling machine operations at a half-length point of a lengthwise one Article of unknown length carried on a conveyor, characterized in that a first and a second drive part are provided so that they can be driven synchronously with the conveying device and are in operative connection with one are first and a second coupling part, each of which can be coupled independently to peripheral parts of the first and second drive part, the drive in the same direction takes place, and that the second coupling part in the coupled state by the second drive part at twice the speed of the first coupling part drivable by the first drive part is drivable, that actuating means are also provided are to the first coupling part with the first drive part depending on the first occurrence of two signals to be coupled, whereby the second coupling part is taken along by the first coupling part at a low speed, furthermore further actuating means to couple the second coupling part to the second drive part in dependence on the

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second appearance of the two signals, and that one of the two signals by passing the trailing edge of the Article at one point and the other by moving the leading edge of the article past another point is generated forward in the direction of transport of the article, and that finally 'the switch element in connection with the second coupling part is arranged and can be actuated by this when the second coupling part assumes such a position, at which the mechanical work process is to be triggered.

Although the features of the invention can be applied to a wide variety of machine operations, is their use in connection with v / ash folding operations is a preferred one Area of application.

In a further embodiment of the invention, a control device to control the folding of 'i / ash articles thereby be characterized in that the conveying device, which is provided with a conveyor belt, which transports the articles to the end of the conveying process conveyed, on this iünde has a conveyor drum, in the area of which two drop rollers with horizontal axes are arranged which are one above the other and in mutual contact so that they can be driven in opposite directions of rotation are, these folding rollers below the reversal point of the conveyor belt and in the immediate vicinity of the reversal line certain vertical plane are arranged that also horizontally movable finger or G-hoop elements opposite the line of contact of the folding rollers are arranged, and that a drive element preferably designed as a coil

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OMGlNAL

is provided in order to push the pinger elements between the folding rollers when switching on, that also a. first and a second container are arranged on the upper run of the conveyor, which can be actuated by the passage of the rear edge and the front edge of the article to be folded, the second switch being arranged closer to the conveyor end of the conveyor than the first, that further means for generating two signals are attached depending on the actuation of the two switches, au? he eiern the first and second drive parts in connection with, learn the first and second coupling part, which can be independently coupled to the respectively assigned circumference of aes first and two Leu drive parts and can thus be driven in the same direction, the second coupling part from the second drive part at twice the speed of the first clutch, when it receives its drive from the first drive part, furthermore means to couple the first drive part: Coupling part then connected to the first v / ira in such a way that the second coupling part is taken along by the first at the same speed v / ira, also means to couple the second coupling part with the second drive part in dependence on the second appearance of the two signals mentioned, v / obei the switch element actuated by the second coupling part w If this has been moved far enough to switch the drive element, and the arrangement is so designed that the article to be folded is conveyed beyond the end of this conveyor belt and then hangs down between the finger elements and the folding rollers, and that the actuation of the drive element

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mente.g, preferably the coil, is triggered in such a way that a, halfway; · I? ä «ge _; . of the article located transverse line through di-e. Fingepel ^ merite -between the ^l: d is above 'altrollen, through which .the pull umgiefaltet) .- product.

Preferably the drive part or both drive parts designed as a drive wheel or drive wheels and with horizontal ones Axles attached. When it comes into contact with the drive wheels, the associated part is cev / ogt upwards, the coupling part or parts being essentially in the form of a sector disk can be designed. The confirmation then takes place expedient in the area of the circle centers on horizontal axes, and the doge-shaped edge of the coupling part can with the circumference of the respective drive wheel are brought into contact.

ns appears advantageous to articulate the coupling part or the • coupling parts in the area of a lever arm mounted on one side, and to connect actuating means for pivoting movement in the area of the other end of the lever arm, in the course of which the coupling part came into contact with the associated drive part. These actuation means can be designed hydraulically, pneumatically in the form of cylinders with pistons or in a similar manner, the use of a coil as such actuation is preferred.

According to the explained health aspects of the invention The second drive part, designed as a drive wheel, preferably has twice the circumference and therefore the drive is twice as large

909815/0295

Peripheral speed of the harvested drive part. Each of the two coupling parts are expediently designed so that they are "moved by the drive shaft against the direction of gravity. The second element is advantageously driven by the first by the fact that a recess open on one side in the ochwerkkraftrichtung is provided in the inside. in. which a Uitnehn'jrrtii t or another. kns (\ tzrV> \ ck of the first coupling; divider a matures, ¹ VoLeI the arrangement is designed in such a way, "ia.?. when coupling the second Eu; -; plungT: part with the second drive. ⁰ part of the first Kuivlimgteil "is detached from the first drive part and can fall down.

In the following, two embodiments of the invention are under Schematic reference to the attached drawings shown; show it:

Figure 1 is a schematic side view of a control device according to the invention,

Figure 2 is a side and a front view of an oteuer ^un device according to a development of the invention,

FIG. 4 shows a schematic representation of further parts in FIG Connection to a switched by the control device shown in Figures 2 and 3 Conveyor.

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90981 5/02 ¹ JS 6ADORiGlNAL

With reference to Figure 1, the control device contains a coupling part 1, which is made of plates ^: > r ^v ; 'i; on, tissue reinforced. System made of plastic material essentially in the shape of a sector of a circle and is movably mounted in a pin 2 in the center of the circle. The pin 2 is fastened to a lever arm 3 which is supported by a pin bearing 4 at one end and is connected to a drive coil 6 at the other end with the interposition of a spring 5. When switching on the AntriebosouTe 6, (caused by a not shown in the drawing switch in response to the passage of the article) of the coupling part 1 comes into contact with the periphery of a drive wheel 7, the arrow inclined direction of rotation continuously rings in the ¹ URGH exaggerated vri. rd, the drive being carried out synchronously with the / tab oiler by a friction wheel which rests on the circumference of the drum of the filter, not shown, from which the articles are delivered to the conveyor device of the folding machine, also not shown in this illustration. The coupling part 1 is moved upwards by the drive wheel 7 against the direction of gravity, and after a predetermined number of revolutions of the drive wheel (corresponding to a predetermined transport path of the article) the upper end of the coupling part hits? 1 against the arm of a microswitch 8, which triggers the operation of the folding machine in such a way that a pair of jaws clamp the order edge of the article between them. At the same time, the drive coil β is de-energized. The coupling part 1 then falls down on a stop 9, the height of which is adjustable, whereby the amount of delay can be varied.

-1Q-909815/0295 ^8A * ^ "

FIGS. 2 and 3 show a control device which ensures that the working process of the machine is triggered by an article extending towards the lungs. The disorder is similar to that shown in FIG. 1, but here there are two sektorf.hvii-e Kunolung parts 1a, 1b pivotably articulated on pins 2a, 2b, which lie on a common axis. The coupling parts Im, 1b are mounted on zuge'iori ^ en lever arms 3a, 3b, v / which iiiL-orseits in Za ^r fo;: iagern 4a, 4b are articulated, the ends of the lever arms 3a, 3b with drive coils 6a whether under Zvisohen ^ c-ialtung von Feder .; 5a, 5b connected si no .. 3 ei Jrre; un · the "^ belonging. Drive coil 6a, 6b is the coupling part" la or 1o re .-; eu den Umlari ^ from jüv / eils zureL'Jr.i _; An ;; s ration tr ^r:; /j.ern 7α or 7t pulled. The two drive wheels 7a, 7b are arranged on a ^; e: iieein? Anen axis and .ireher: towards? A:.: R.ien. in the red direction of rotation indicated by the arrow; synchronous ; Ai ler Fordervori direction from which your drive from, -; eleitat int. The drive wheel 7b has twice the diameter .less drive wheel it 7a, and the second ί · "" χν. part 1b is lüi: iGnis-; calculating with et-.van lower "iadius than the first Kr.:r:lun "c Leil 1a. The Liikro switch 8a is located at the upper end of the movement path of the coupling part 1b and v: is actuated by touching this coupling part 1b. The starting point of the movement of the first and second coupling parts 1a and Ib Ir; t is determined by the adjustable stop 9a, on which the first coupling part 1a rests in the starting position.

When the drive coil 6a is switched on, the coupling part 1a with the drive wheel 7a in -> contact and v / ird against the

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■ · ■ - '' - 11 -

Gravity moves upwards, the clutch. ⁰ part 1b is taken in the same way. This is mediated by a .litnehmerstift 10 in the coupling part 1a, which engages in a recess 11 open on one side in the coupling part 1b. The arrangement is therefore not reciprocal, because when the drive coil 6b is switched on, only the coupling part 1b moves upwards and that at twice the speed at which the coupling part la moves in the associated coupling process.

A typical workflow for the control device according to FIGS. 2 and 3 is to be explained in connection with its use for folding ash articles in half. Figure 4 shows schematically the associated parts of such a folding device. With reference to FIG. 4, a conveyor device can be seen which moves continuously in the direction of rotation determined by the arrow on the conveyor drum 13. The article 14 to be folded is at the end in the area of the conveyor drum 13 conveyed so far that it protrudes beyond the reversal line and hangs down in front of av / ei mutually rotatable and in contact folding rollers 15, because the point corresponding to half the length of the article, ie the assigned Fold line, with the line of contact of the two folding rollers 15 is at the same level, a release coil 16 provided as a drive element is switched on, and this pushes an envelope strip 17 arranged in the area of the folding rollers 15 behind the ashes article in the direction of the folding rollers 15, whereby the center line of the article between the folding rollers' if. The article is then folded and pulled through between the folding rollers 15.

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ONGJNAL

To control the "excitation of a trip coil 16" is at an article of unknown length, the device shown in Figures 2 and 3 in conjunction with two micro switches 18,19 used, which are arranged along the conveying path and in each case when passing the leading edge and when Passage of the rear edge of the article can be actuated. The distance between the microscopic ages 18, 19 corresponds to Half of the maximum length of an article to be folded. Of the The distance in the conveying path of the article from the micro switch 18 to the folding part in the form of the fold-over strip 17 becomes so small made as possible. In an arrangement of the type shown, in which the articles to be folded come piece by piece from the conveyor device. This last-mentioned distance can be approximately 15 cm (6 ") and a distance between the Llicro switches 18 and 19 are about 0.b m. Such a device is receptive to articles that have a maximum length of about 1.20 m - usually about 2.40 m long cloths, which are already folded in half - have.

ienn the front edge of the article massaged the Llikrocchalter 18, Nothing happens at first, except that the willingness to work the circuit for the subsequent sequences ensured will. The passage of the front or juncture edge on the microswitch 18 activates this switch, which thereby the drive coil 6a switches on (FIG. 2). The coupling parts la and 1b move at a speed proportional " the drive speed of the conveyor device upwards, because the rear edge of the article passes the microswitch 19, If this switch is activated and the drive coil is switched on, while at the same time the shutdown of the previously

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excited drive coil 6a takes place. The coupling part 1b Dew goes further upwards with its own, double so high propulsion speed compared to the air intake through the coupling part 1b, this speed also being proportional to the speed uer 'j'oro.ervorrich-

tion is. Finally, aer coupling part 1b hits against the i.Iicroswitch 8a, which switches on the release coil 16 and so that the folding process triggers. The drive coil 6ü is de-energized and the coupling part Ib can now iieraoiallen. The distance between the stop 9a and the Liikro switch 8a is set so that the trip coil 16 is then energized, when the point corresponding to half the length of the article passes the impact strip 17.

The microswitches 18 and 19 and the drive coils 6a and 6b are interconnected in such a way that the first of the switches which is operated turns on the drive coil 6a and the second turns off this drive coil 6a, however at the same time the drive coil 6b switches on (it should be noted that the actuation of the Llicro switch 19 from the rear edge and not from the leading edge of the item). In this way the process of measuring and the Delay process, as described above, carried out, even for items whose length is less than the distance between microswitches 18 and 19.

The coupling of the coupling parts 1a and 1b by the driving pin 10 and the recess 11 offers the advantage that the coupling part 1a can return to its starting position, before the coupling part 1b the measuring and delaying operation

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", i.e. before the article has been folded. Thereby it is possible to measure the following article by the upward movement of the coupling part 1a and thus begin before the previous article is folded. This enables the articles to be sequenced quickly. 7 / enn the convolution operation is triggered for the previous article has been, the coupling part 1b goes back only to the position of the coupling part 1a, and the sizing process for the next article proceeds as usual.

Application of the features of the invention is not to the details of the preceding description with reference to the drawings. For example, it is possible to use the two Coupling parts 1a, 1b to be permanently connected to one another, if quickly successive from the easy possibility of measuring Article no use should be made. Furthermore, it is not necessary for the movable coupling parts to be sector-shaped to design. Rather, these can be sliders, which by contact with the associated drive wheel to the Lever arms slide up. The coupling between the two coupling parts can in this case be produced by an arm which starts from a coupling part and engages under the other coupling part. It doesn't require that Lever arms can be actuated by coils, but hydraulic or pneumatic pistons and pistons can also be used for this purpose Cylinders are used, and the return of the coupling parts to the starting position cannot or not exclusively caused by gravity but also by springs, e.g. if it is desired that the coupling

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§AS OVGiNAL 909815/0295

lung parts are arranged for horizontal movement. The drive parts can also be moved instead of rags Blind people or the like are formed.

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Claims (1)

A 284 Claims 1) Control device for the control of machine operations in an article transported on a conveyor device, characterized in that at least one drive part which can be driven synchronously with the transport movement of the article is provided, in connection with a coupling part which can be pressed against the circumference of the drive part and thereby ^r1 he peripheral speed of the drive member clcX is IAIT a speed depending driven further scarf are tinittel provided cn with the aid rl or Antriebstoil with the associated coupling part in ibhi'ngigksit from the passage of the article a reference] jsition LuppelL.ir int, and since Finally, a switch element is brought in, which works in conjunction with your Ku ₁ . lmißcteil is, and is switched by this to trigger the m;, i.chinellen work process. 2.) Control device according to claim 1, characterized that for the control of machine work processes, ..eiche at a point half the length of a the length ngch extending article of unknown length are to be used, a first and a second drive part are provided so that they can be driven synchronously with the conveyor device. 'and are in operative connection with a first and a second coupling part, which are each independent with peripheral parts the first and the second drive part can be coupled 8Q981S / 029G are, the drive takes place in the same lease, and that the second coupling part through in the coupled state the second drive part is drivable at twice the speed of the first coupling part drivable by the first drive part, that actuating means are also provided are to the first coupling part with the first drive part depending on the first occurrence of two To couple signals, the second coupling part from first coupling part is taken along at the same speed, furthermore further actuating means around the second Coupling part to couple with the second drive part as a function from the second appearance of the suffering signals, with the entrainment of the cyclic coupling part from the first coupling part ceases, and that the two signals on the transport path of the conveyor device are in the »/ ice derived be that the one of the two signals through switch means when the trailing edge of the article passes a predetermined Point, and the other signal when passing the leading edge of the article is generated at a different point that the article later reaches during its transport movement, and that finally the switch element is arranged in direct connection with the second coupling part and through this can be actuated when the second coupling part assumes such a position as to trigger the mechanical operation is. 3.) Control device according to claim 2 for controlling the folding of laundry items, characterized that the conveyor provided with a conveyor belt has a conveyor drum at one end, in which Area of two folding rollers arranged with horizontal axes - 909816/0295 SABOfttäJNAL / η are, which are one above the other and in mutual "contact, so that they are rotatable in the opposite direction, these Folding rollers below the turning point of the conveyor belt and in the immediate vicinity of the one determined by the turning line vertical plane are arranged that also horizontally movable finger elements opposite the üerührungslinie the Faltroilen are arranged, and da'i a preferably designed as a coil drive element is provided to the To push finger elements between the folding rollers when switching on, that?) Furthermore, a first and a second switch on the The upper run of the conveyor device is arranged, which by the passage of the rear edge and the front edge of the article, which is to be folded, can be actuated, the second switch being closer to the conveying end of the conveying device arranged as the first, that further means for generating two signals in response to the actuation of the two switches are attached, as well as the first and second drive parts in connection with the first and second Coupling part, and that the switch element operable by the second coupling part, said drive element for Actuation of the finger elements turns on, the arrangement being designed so that the article to be folded over the end of the conveyor belt is conveyed out and then hangs down between the finger elements and the folding rollers, the finger elements when the drive element is switched on at a point in time which is half the length of the one to be folded Article corresponds, push the folding edge between the folding rollers, which then pull the article folded over, 909815/0295 SAS 4.) Control device according to one of the preceding claims, characterized in that the g e k e η η ζ e 'i c h η e t Control device in connection "with such a laundry folding machine is provided, in which the work flow of the machine is a folding process which is carried out on an item of laundry running on the conveyor of the machine. 5.) Control device according to one or more of the preceding claims, in which at least one drive part as a drive wheel · 'with horizontal axis is formed, and that when coupling with the drive wheel, the associated coupling part is movable upwards. -: 6.) Device according to claim 5, d ä d u r c h g e k e η η draw t. that a coupling part's sector-shaped like a disk and is rotatably mounted about a horizontal axis arranged in the center of the circle, the arcuate edge of the coupling part with the circumference of the associated drive wheel can be coupled '. 7.) Device according to one or more of the preceding claims, since d, ü r- ch ^c ; e k. e η η indicates that at least one coupling part is articulated movably in the area of one end of a single-sided / mounted lever arm, and that in the area. · Εβ, - other Snde.s of the lever arm _r Betätigungsmit.tel to Sqhwenk.bewegung of the lever arm connected are ,. where; i) e; i -der. Coupling part in contact with the associated JUi drive part reaches _o -; ■ ·. ... 909815/0295 b.) Device according to claim 7, characterized in that g e k e η η -; draw.et that the actuating means are designed as a coil. .- ■ - ■■ 9.) Device according to one or more of the preceding claims, characterized in that the circumference of the second drive part, designed as a drive wheel, is twice as large as the circumference of the first designed as a drive wheel drive part, and that thereby the second drive wheel, at the same drive speed twice the circumferential speed of the first drive wheel • has. 10.) Device according to one or more of the preceding claims, characterized in that the two coupling parts by the drive wheels in the form of a friction drive against the direction of gravity can be raised, the second coupling part having a recess which is open on one side in the direction of gravity, in which engages a driving pin of the first coupling part 11.5 Device according to claim 1O ₁ characterized by such a design that when coupling the second coupling part to the second drive part of the first coupling part; can be disengaged from the first drive part and falls down. * «J, '-. 12 ·) Device according to claim 11, characterized in that 'in Movement path of the first coupling part an adjustable stop is provided. . V. ·, Γ ' Ö09815 / 0295