DE1872723U - FOLDING DEVICE FOR CROSS-FOLDING PIECES OF LINEN BEHIND WASHING ARRANGERS DGL. - Google Patents

Description

Folding device for transverse folding of items of laundry behind ironers or the like.

guiding devices! For the transverse folding of items of laundry, esp. Sheets, towels, tablecloths or the like. In which above a laying table provided with conveyor belts guided across these bridges movable clamping plates are provided to grasp and hold the leading edge of the item of laundry and are provided by rolling of the item of laundry "when this item of laundry is pushed across by the conveyor belts are known. It is proposed to provide switching means in front of the clamping plates by which electromagnets or the like are actuated which bring the clamping plates into clamping or releasing motion. 2 _{U For} this purpose, in front of the bridges, pivotable switching levers, which serve as buttons and which actuate an electrical contact., Are provided, while the movable Kiemm- plates are actuated by an electrical switching means, for example a lifting magnet, this lifting magnet by a special contact lever is switched on. In devices of this type, it is also proposed to effect the release movement with a delay in that a second lifting magnet, switched on by a special contact lever, actuates a safety lever which holds the clamping plates in the clamping position. "'-—._

Finally, it is proposed to provide several bridges arranged one behind the other with clamping plates around the workpiece to be folded across several times.

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Bs is already known for controlling a folding device the light beam of a light source on a photo, cell to act in order to operate the clamping bar to control the folding device.

You also have two light rays for the actuation of the clamping device in the clamping position and used for the release of the clamping bar.

It is also already known to use ramp-like guide means in front of the clamping bar for lifting the laundry.

Sometimes there are only grippers that are between grasp the conveyor belts for the transport of the laundry, applied.

While in the first-mentioned device, the compartment part is that a second solenoid to secure the Clamping plates must be provided, and in addition there is still no proper folding of the workpiece in this way it is achieved that the beginning and end edges of the item of laundry are exactly on top of each other after folding, as in the case of the above-mentioned also in the case of the other devices, the subject part consists in the fact that through the use of switching levers serving as buttons, a friction is exerted on the item of laundry, which is all the more The thicker the item of laundry is, the larger it is. One has tried to remedy this by making the shift lever elastic trained. - ■ ---

|} Another disadvantage is that the spacing between the first switching means located in front of the switching bridge and the second switching means cannot be regulated is. So you could not adjust the device so that the protruding end piece was trapped Corresponds to the beginning of the laundry item. Bs was necessary additional safety levers, which were electric must be operated and a third gear lever

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request to provide. around the laundry - only then through Release the clamping device when the end edge of the folded Tföschestückes is in the vicinity of the clamped Leading edge. But here, too, there was the disadvantage that regulation was not possible, so that an exact superimposition of the beginning and end edge could not be achieved.

The invention makes it its task to eliminate these disadvantages and to create a folding device, in which a perfect folding and stacking of the beginning and end edge of the item of laundry is possible without causing any friction on the item of laundry, and with which no special switching means are necessary that require a special operable switch. It is merely using two in different Switching means arranged on the level ensure a safe function when jamming and when releasing the Clamping plate achieved * Irregularities occurring during operation can be easily corrected.

The firing consists in the fact that the switching means, e.g. switching lever, Light beam or the like. through an opening located behind the front edge of the clamping plate.

Another new feature is that for switching the solenoid that controls the upward and downward movement of the clamping plate or Relay, which actuates a valve for the pressure medium supply of a pressure cylinder, with interconnection an amplifier and transformer, two photocells are provided, one of which is in front of the clamping plate and

the other in the Wasehe direction behind the leading edge the clamping plate is arranged.

Another innovation is that the beginning edge the light beam scanning the folded goods and the light beam scanning the end edge are each the same

Have a distance from the front edge of the clamping plate »

Further innovations exist in the special training the passage opening and in the subdivision of the Kienmeinrichtung rlni; mehrerea single clamping plates.

The firing can be carried out in various ways. It is illustrated in the drawing in several exemplary embodiments, namely shows:

Figure 1: a folding device in a longitudinal view with several Folding bridges arranged thereon and containing the folding mechanism and the conveyor belts,

Fig. 2i. a front view of Fig. 1 in the direction seen the arrow A,

show on a larger scale, partly schematically, the photocell control with solenoid or Eelais and the item of laundry to be folded in "different positions,

Fig. 9 * shows another embodiment of the printing cylinder using a solenoid valve, partly in cross-section,

FIG. 10i shows an example of a holding scheme.

The laying table, which can be adjusted to various inclines 10, which can be pivoted, for example, about the shaft 11 and adjustable in height by means of adjustable feet 12 is, is with adjacent, over rollers 13, 14 running conveyor belts 15 provided.

The folding table 10 is, for example, behind a Laundry ironer 16 so 'arranged that the of this

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Fig. 3: Jj ig. 4: Fig. 5: Fig. 6: Fig. 7: Fie. 8th:

dispensed read piece, get onto the conveyor belts 15. The conveyor belts 15 are driven, for example by a motor 17 by means of an endless pulling element 18.

Above the table 10 are at a distance across Box-shaped bridges 19, 20 running around the table, which are expediently provided with hinged lids, provided that carry the folding mechanism. This Faltmachanismus is in Figs. 3 to 8 in larger Scale illustrated in one embodiment.

Below the bridge 19, a plurality of clamping plates 22 pivotable about bolts 21 are provided next to one another, the front edge 22a of which faces the direction of advance of the item of laundry 23, -Am the bridge box there are also several stops 24 for the clamping plates, which are expediently made of elastic material 22 provided.

Behind the front edge 22a of each clamping plate 22, a photocell 25 is provided, which is through a light beam 26 of a light source 27 arranged below the table 10 can be influenced. The clamp plate 22 has an expediently elongated or oval opening 28 for the light beam 26.

Instead of a light beam 26 passing through the opening 28, it may also be possible above the clamping plate 22 behind the front edge 22a of the same, a switch lever, for example microswitch, may be provided, its Lever arm engages in the opening.

The clamping plate 22 is by means of an arm 29 to the Piston rod of a piston. 30 of a pressure cylinder 31 is connected in an articulated manner. @er piston 30 is means Compressed air influences and can be pushed back and forth. Lines 32, 33 are provided for this purpose, which are controlled, for example, by a multi-way valve 34. Of the. Actuating lever 35 of the valve 34 is connected to the displaceable core 3.6 of a solenoid and is under the action of a spring 38.

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The photocell 25 is inside the bridge box, which can be open at the bottom, for example on a pole

39 longitudinally displaceable in the conveying direction of the laundry items 23 and for example by means of an adjusting screw

40 detectable.

Yor the jumper is conveniently on a pole a second photocell 42 - also in the conveying direction displaceable - lockable by means of adjusting screw 40. This photocell 42 is also activated by the light beam from a light source 43 installed below the table 10 44 influenced.

For the passage of the light rays from both light sources 24, 43 the table 10 has openings 45.

In the release position, i.e. when the clamping plate 22 is moved downwards, the front edge 22a is in such a position Distance from the conveyor belts 15 set that the item of laundry 23 - after being pushed onto the clamping plate 22 - still under the clamping plate 22 by the conveyor belts 15 can be advanced.

The position of the solenoid 37 for actuating the valve 34? which can be connected to a compressed air line 46, for example, takes place with the interposition an amplifier 47 and a transformer 48 by means of of the two photocells 25? 42, one of which is a photocell 42 in front of the clamping plate 22 and the other photocell 25 in the laundry feed direction behind the front edge 22a the clamping plate 22 is arranged. The circuit has been omitted from the drawing for the sake of clarity.

In front of the clamping plates 22 are a plurality of inclined ones Guide means 51, for example wire hangers, are provided through which the items of laundry are pushed forward raised and fed to the released, that is to say folded down, clamping plates 22.

These guide means 51 are expedient on the table 10 arranged between the conveyor belts 15.

The photocell 25 is in this way in the area of the clamping plate 22 - that is, a sufficient distance behind the front edge 22a - arranged that the solenoid 37 for actuating the clamping plate 22 in the clamping position only after sufficient further pushing the item of laundry 23 responds by light beam interruption.

As shown in the drawing, two folding bridges 19 , 20 can be provided one behind the other. It would be possible to provide additional folding bridges above the folding table - if this is long enough.

According to the invention, when using several folding bridge Above the folding table, each bridge can be individually removed from the table and exchanged if necessary. Each folding bridge then carries a number of clamping plates and the associated stops, pressure media and photocells.

The way it works is as follows

In FIG. 3 it is shown that the item of laundry 23 was pushed up to about the light beam 44 by the conveyor belts 15. The clamping plate 22 is located is in the released position, so it has folded down. This was caused by the photocell 42 influences the solenoid 37 in such a way that, against the spring action 38, the actuating lever 35 moves into the drawn position arrives. The valve 34 opened the compressed air line 32 so that the piston 30 of the Printing cylinder 31 was pushed to the left. The photocell 25 is also switched on here.

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If now - as shown in Fig. 4 - the item of laundry -23 advanced further, it reaches the clamping plate via guide means 51 with its front edge 22, Although the light beam 44 is now interrupted, the light beam 26 is for the photocell 25 not yet interrupted; so that the clamping plate j 22 remains in the release position.

In Fig. 5 it is shown that the piece of laundry 23 _come: has been advanced that even the light beam 26 was 25 for the photocell interrupted. This results in the solenoid 37 being switched over. It is currentless and the switching lever 35 - influenced by the spring 38 - · switches the valve 34 so that the compressed air j

is fed via the line 46 and the line 33 to the other piston side of the pressure cylinder 31. The clamp 22 is swiveled up and uras laundry item 23 is clamped.

With further advance of the item 23 of laundry this will rolled to form a fold 52 - see FIG. 6.

Is the end edge 23b advanced so far that the light source 43 can act on the photocell 42 by means of the light beam 44, the solenoid 37 is excited and the valve 34 is switched over so that compressed air flows through the line 32 to the piston 30 in this way acts that the clamping plate 22 is pivoted downwards and. so that the item of laundry 23 is released, see Fig. 7th

The photocell 42 is arranged at a distance from the photocell 25 such that the edge 23a of the on the clamping plate 22 pushed-on and jammed laundry items exactly with the edge 23b "at the end of the item of laundry on top of one another, see Fig. 8.

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The fact that the photocells can be moved lengthways makes it possible to adjust the length of these protruding items of laundry Adjust exactly at the beginning and end of the laundry. For example, the photocell is used for this purpose 42 can be displaced by approximately 155 mm in the longitudinal direction of the laying table 10. For the purpose of precise adjustment the photocell 25 can also be displaced by a certain amount. The light sources 27, 43 are on the Table 10 can be adjusted in its longitudinal direction so that it can be adjusted precisely to the photocells 25, 42 can.

The same device is shown in FIG. 9, the only difference being that a compressed air cylinder 31 is hinged to the piston 30 rotatably about the bolt 49, while the piston rod 30a with hinge 50 on the clamping plate 22 engages. The piston 30 is under the action of a spring 53 · He is acted upon by the hoof of a solenoid valve 54 with compressed air. Pressure cylinder 31 and solenoid valve 54 can be arranged coaxially. The photocell 25 above the clamping plate 22 lies next to the pressure cylinder 30. There is also an additional relay 58 provided.

In Fig. 10 an exemplary circuit diagram is illustrated, the transformer 48, the amplifier 47, a special switching relay 55 and the Magnetvantil 54, terminals 56 and a fuse 57 illustrated.

It happens that - when the clamping plate 22 goes up - the pocket pieces 23 are retracted a little and the light beam 26 breaks through again. The clamping plate 22 would then begin to flutter. To prevent this, a delay relay for the photocell 25 is provided. The clamp 22 remains - if the photocell 25

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was dark - at the top until the next impulse comes from the photocell 42. The great adjustability of the Photocell 42 is only necessary for the adjustment in order to adapt it to the conveyor belt speed.

The adjustability of the photocell 25 is only for the Drain length on the clamping plate 22 required. Therefore a short adjustment of 30 mm is sufficient.

The laying table and the bridges can be such a width have that, for example, two large sheets can be folded side by side at the same time. Behind The table is provided with a second laying table (not shown in the drawing) on which an operator can sit can fold or fold the laundry lengthways again.

With the device it is possible at the same time, different sized fish / ashes, for example on the one half large sheets or the like, and on the other Half small pieces such as towels, napkins, pillow cases or the like. to fold.

Claims (11)

RA. 2-6 G 525 * 22. K Bi protection claims 1.) Folding device for transverse folding of items of laundry behind ironers or the like., In which above a conveyor at least one grasping the starting edge of the folded item guided over a lifting device Clamping device is arranged and wherein the tightening and falling of the clamping device of on the Switching means acting on the start or end edge of the folded item, for example multi-beam controls, is actuated and wherein the clamping device is actuated by electrical, pneumatic or hydraulic means is characterized in that the edge of the ibifangs of the folded item (23) detecting switching means, for example lever, light beam or the like. through a behind the front edge of the clamping plate (22) lying through the opening. 2.) Folding device according to claim 1, characterized in that for the switching of the upward and downward movement the clamping plate (22) controlling solenoids' "(37 (or relay, which is a valve for the pressure medium supply a pressure cylinder (31) actuated, with the interposition of an amplifier and transformer two photocells are provided, one of which (25) in front of the clamping plate (22) and the other (42) in the laundry feed direction is arranged behind the front edge (22a) of the clamping plate (22). 3.) Folding device according to claim 1 and 2, characterized in that the light beam (26) scanning the starting edge of the folded item (23) and the light beam (44) scanning the end edge each have the same distance from the clamping plate front edge (22a). _ 2 - f ■. - 2 - RA.ZGB 525 * 22. Ί- 4.) folding device according to claim 1 to 3 _? characterized in that the passage opening (28) for the light beam (26) capturing the starting edge of the folded item (23) through the clamping plate (22) is elongated in the conveying direction, both light beam control devices (42, 43, 44, 25, 26, 27 ) are adjustable (40) in a known manner, 5.) Folding device according to claim 1 to 4, .due to this marked that the entire width of the conveyor or The clamping device is subdivided in a known manner into several independent controlled and actuated individual clamping plates, 6.) Folding device according to claim 1 to 5> characterized in that the clamping devices are detachably attached to the conveyor device * 7.) Folding device according to claim 1 to 6, characterized in that the photocell (25) for actuation the clamping plate (22) is arranged in the clamping position in the region of the clamping plate (22) is that the solenoid (37) or relay for actuating the clamping plate (22) is in the clamping position only after the item of laundry has been pushed on sufficiently (23) responds by interrupting the light beam. 8.) Folding device according to claim 1 to 7, characterized in that the for releasing the clamping plate (22) serving photocell (25) in the loading direction Is longitudinally adjustable, for example the photocell (25) on a carrier of the folding bridge (19, 20) is slidably arranged while P.A. 266 525 * 22. Ί.63 the light source (27) below the table (10) lengthways. is adjustable » 9.) Folding device according to claim 1 to 8, characterized in that that the second photocell (42) above the clamping plate (22) and its light source (43) on the folding table (10) can also be adjusted in the longitudinal direction. 10. folding device according to claim 1 to 9, characterized in that that the back stroke of the piston (30) of the pressure cylinder (31) through a leather (53) and only the clamping is effected by pressure medium. 11.) Folding device according to claim 1 to 10, characterized in that that the pressure cylinder (31) is pivotably mounted and the piston rod (-3Oa) is articulated, on the extension engages the clamping plate (22). 12,) Folding device according to claim 1 to 11, characterized in that that for the control of the pressure medium supply and ventilation, a -.- connected to a compressed air line nes solenoid valve (54) is used. 13 «-) folding device according to claim 1 to 12, characterized in that that the solenoid valve (54) and the pressure cylinder (31) are arranged coaxially. For the applicant: April 17, 1963 Note: Bjnar Jensen and S / zin i / S
Bjanne (Denmark) -Aktz.i B 43 753 / 8d Gm