EP3568516B1 - Verfahren und vorrichtung zum ausbreiten von wäschestücken - Google Patents
Verfahren und vorrichtung zum ausbreiten von wäschestücken Download PDFInfo
- Publication number
- EP3568516B1 EP3568516B1 EP18700632.5A EP18700632A EP3568516B1 EP 3568516 B1 EP3568516 B1 EP 3568516B1 EP 18700632 A EP18700632 A EP 18700632A EP 3568516 B1 EP3568516 B1 EP 3568516B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spreading
- clamps
- laundry
- sensor device
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007480 spreading Effects 0.000 title claims description 148
- 238000000034 method Methods 0.000 title claims description 39
- 238000005259 measurement Methods 0.000 claims description 38
- 238000007665 sagging Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 description 21
- 238000012546 transfer Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F67/00—Details of ironing machines provided for in groups D06F61/00, D06F63/00, or D06F65/00
- D06F67/04—Arrangements for feeding or spreading the linen
Definitions
- the invention relates to a method for spreading out items of laundry according to the preamble of claim 1.
- the invention also relates to a device for spreading out items of laundry according to the preamble of claim 8.
- Items of laundry are fed from an input machine to a downstream laundry treatment device, in particular a mangle.
- the items of laundry are first spread out by the input machine and fed into the downstream laundry treatment machine in the spread out state.
- the feeder has a spreading device with one or more pairs of spreading clamps.
- Each pair of spreader clamps has two spreader clamps that can be moved apart and together transversely to the feed direction of the spread-out items of laundry to the downstream laundry treatment device.
- the spreading clamps are also moved in such a way that they center the respective item of laundry in the middle of the respective input path of the input machine.
- the items of laundry may only be spread out in such a way that an edge of the adjacent corners of the item of laundry held between the expanding clamps of the respective pair of expanding clamps is not excessively stretched, so that the respective item of laundry is not damaged.
- so-called sag sensors are according to the DE 41 43 069 A1 in front of the item of laundry to be spread out, so that they determine the deepest point of the sagging of the edge of the item of laundry located between the spreading clamps of the pair of spreading clamps on the front side of the item of laundry. It has been shown that objects in the background falsify the measurement result and/or lead to measurement errors when the sag sensors of known input machines are viewed horizontally.
- the invention is based on the object of creating a method and a device for spreading out items of laundry, with which the items of laundry can be spread out gently and reliably and within a very short time.
- a method for solving this problem has the features of claim 1. Accordingly, the sensor device views or measures the edge of the item of laundry located between the spreading clamps of the respective pair of spreading clamps from above. This eliminates background interference. In particular, it is prevented that another item of laundry located in front of and/or behind the respective item of laundry to be spread out cannot or not unambiguously measure the sagging of the upper edge when the item of laundry is spread out.
- the at least one sensor device determines the edge located below it between adjacent spreader clamps of the respective pair of spreader clamps without contact, preferably multiple times and/or continuously.
- the edge is measured by the sensor device from above without contact.
- the sagging of the upper edge of the laundry item is measured by the respective sensor device via the adjacent corner regions of the laundry item held by the spreading clamps by at least one rapid non-contact distance measurement. In this way, at least the deepest point of the edge sagging between the expansion clamps is preferably determined.
- the method on the basis of the sag line determined by the at least one sensor device and/or maximum sag of the upper edge of the item of laundry hanging on the spreader clamps and/or the associated distance of the spreader clamps of the respective pair of spreader clamps measured by the respective sensor device to calculate the time of the end of the spreading, in particular the pre-spreading, of the item of laundry and to brake the spreading clamps in a targeted manner at this point in time.
- This procedure allows an exact determination of the point in time at which the expanding clamps are braked, even if the expanding clamps are rapidly moved apart, specifically also at the end of the pre-expansion, in which the expanding clamps are moved apart at high speed. In particular, measurement errors, measurement inaccuracies and/or incorrect measurements are also excluded.
- a further possible embodiment of the method provides for the spreading clamps to continue to be moved apart at a predefinable, lower speed after the item of laundry has been pre-spread. In the process, a final spreading or final spreading of the respective item of laundry takes place.
- the spreading clamps of the respective spreading device can be moved apart, and thus the process of spreading the laundry item out, in a targeted manner and at an exact distance between the spreading clamps. In this way, despite short cycle times, the spreading process can be ended exactly without the risk of damage or destruction of the respective item of laundry when it is spread out.
- a device for the task mentioned at the outset has the features of claim 8 .
- This device provides for the at least one sensor device to be arranged vertically above an imaginary horizontal connecting line between the two spreader clamps of the spreader clamp pair in question. Unlike before, the at least one sensor of the sensor device looks from above along a vertical path onto the edge of the item of laundry to be spread out. As a result, objects located behind and in front of the item of laundry, in particular other items of laundry, do not impede the sensor device.
- the at least one sensor device is preferably arranged just above the connecting line between each two spreader clamps of a spreader clamp pair.
- the at least one sensor device has at least one sensor for generating an analog measured value. This allows the edge of the laundry can be determined reliably and unambiguously even if there is initially a large sag from the sensor.
- the at least one sensor of the or each sensor device has an output measuring frequency that is below 20 ms, preferably below 10 ms.
- Such an initial measurement frequency enables successive measurements to be taken at very short time intervals.
- the point in time at which the spreading clamps must be decelerated and/or stopped can be reliably determined so that the edge of the item of laundry is stretched sufficiently but not excessively.
- Such a sensor thus contributes effectively to the best possible protection of the items of laundry, even when the items of laundry spread out very quickly.
- the figures show a device that is designed as an input machine.
- this input machine is shown in full.
- the input machine serves only in the Figures 2 to 5 laundry items 10 shown, in particular flat laundry items such as sheets, duvet covers, pillowcases, towels, tablecloths or the like, in the feed direction 10 one in the figures supply defect not shown.
- the device can also be used to feed items of laundry to other laundry treatment devices, for example folding machines.
- the items of laundry 10 are spread out, in particular stretched out or spread apart, by the input machine before being fed to a downstream laundry treatment device.
- the device or input machine shown here has three identically designed loading stations 12.
- the loading stations 12 are arranged at the same distance from one another in a row running transversely to the feed direction 11 on the front side of the input machine.
- the invention is also suitable for input machines with a larger or smaller number of loading stations 12, and also for input machines with only a single loading station 12.
- the spreading device 13 has a horizontal rail 14 running transversely to the feeding direction 11. It is also conceivable that the spreading device 13 has several pairs of spreading clamps, which can be moved on the same rail 14 or on parallel rails 14 lying one behind the other.
- the two expanding clamps 15 of the pair of expanding clamps hold adjacent corners 16 of a front transverse edge 17 of the item of laundry 10 leading in the feed direction 11.
- the transverse edge 17 or also called transverse edge is consequently held between the two expanding clamps 15 of the pair of expanding clamps.
- the expanding clamps 15 can be moved together and apart transversely to the feed direction 11 .
- the two spreading clamps 15 take over the adjacent corners 16 of the transverse edge 17 of the item of laundry 10.
- the spreading clamps 15 apart laterally the respective item of laundry 10 is spread out under the spreading device 13 and the upper transverse edge 17 is spread or stretched between the spreading clamps 15.
- the item of laundry 10 can be removed from the spreading clamps 15 of the respective pair of spreader brackets relative to the center of the device or the respective input path of the same.
- Each loading station 12 has a loading conveyor 18 which transports the item of laundry 10 in the feed direction 11 .
- the loading conveyor 18 is followed by two corner finders 19 which grip adjacent corners 16 of the transverse edge 17 of the item of laundry 10 that is still at the rear during loading from the loading conveyor 18 .
- This transverse edge 17 thus becomes the front transverse edge 17 of the item of laundry 10 to be stretched or spread by the spreading device 13.
- a pair of transfer clamps 20 follows the corner finder 19 of each loading station 12.
- the pair of transfer clamps 20 takes the corners 16 of the item of laundry 10 from the corner finders 19 and transports it to the spreading clamps 15.
- the corners 16 of the item of laundry 10 are then taken over by the pair of transfer clamps 20 from the spreading clamps 15 or from the pair of transfer clamps 20 the corners 16 delimiting the transverse edge 17 of the item of laundry 10 are transferred to the spreading clamps 15 .
- the pairs of transfer clamps 20 can also be moved on rails transversely to the feed direction 11 . These rails run at a small parallel distance in front of or behind the rail 14 of the spreading device 13. As a result, the respective pair of transfer clamps 20 can overtake the spreading clamps 15 of the pair of spreading clamps of the spreading device 13.
- a sensor device 21 is arranged vertically above the spreading device 13 .
- the sensor device 21 is designed to determine, in particular to measure, the sag of the transverse edge 17 of the item of laundry 10 held by the spreading clamps 15 at adjacent corners 16 without contact from above.
- the spreading clamps 15 of the pair of spreading clamps for taking over the adjacent corners 16 of the item of laundry 10 delimiting the transverse edge 17 are located at equal distances to the left and right of the center 22 of the device or feeding machine.
- the spreader brackets are included 15 retracted as far as possible, so that the upper transverse edge 17 of the accepted item of laundry 10 has a maximum sag in the starting position of the spreading clamps 15 ( 2 ).
- the deepest point 23 of the sagging transverse edge 17 is approximately in the middle between the expanding clamps 15, ie on the center 22 of the input machine. However, the deepest point 23 of the item of laundry 10 can also (as in 2 shown) slightly off center 22.
- the sensor device 21 is also arranged on the center 22 of the device or feeding machine at the corners 16 of the transverse edge 17 of the item of laundry 10 to be taken over by the spreading clamps 15 in the center 22 of the feeding machine, specifically vertically above the spreading clamps 15. It is also conceivable to arrange the single sensor device 21 off-centre or to provide several sensor devices 21, which are correspondingly distributed over the working width of the input machine.
- the sensor device 21 is also located above the item of laundry 10 to be spread out in such a way that a vertical central axis 24 of the sensor device 21 perpendicularly intersects an imaginary horizontal connecting line 25 of the spreader clamps 15 of the spreader clamp pair ( 3 and 4 ) and the sensor device 21 or its at least one sensor are located above the connecting line 25 so that they do not touch the upper transverse edge 17 of the item of laundry under any circumstances.
- the vertical center axis 24 of the sensor device 21 lies in the plane of the spread out item of laundry 10 hanging in the spreading clamps 15, the vertical center axis 24 of the sensor device 21 running centrally through the spread out item of laundry 10 ( Figures 4 and 5 ).
- the sensor device 21 is always located at a distance vertically above the lowest point 23 of the transverse edge 17 of the item of laundry 10 held between the spreading clamps 15 sagging transverse edge 17.
- the sensor device 21 arranged at a distance vertically above the spreading device 13 and the item of laundry 10 held thereon has, in the simplest case, a single non-contact measuring sensor.
- the sensor device 21 can also have several sensors located next to one another in the direction of the transverse edge 17 of the item of laundry 10, which not only measure the deepest point 23 of the sagging transverse edge 17 without contact, but at least a large part of the course of the sag of the transverse edge 17.
- the at least one sensor of the sensor device 21 is designed as a distance measuring sensor. It measures the distance from the sensor to the deepest point 23 of the sagging transverse edge 17 without contact, preferably on a vertical measuring path. If there are several adjacent sensors, adjacent distance measurements are carried out, which allow conclusions to be drawn about the course of the sagging of the transverse edge 17 .
- the distance measurement of the respective sensor can be done acoustically or optically.
- the sensor of the sensor device 21 emits a sensor beam 26 that diverges slightly toward the transverse edge 17 . It can also be a conical jet or a planar slit jet, which also spreads slightly diverging in the direction of the transverse edge 17 .
- the at least one sensor of the sensor device 21 is designed to generate an analog measurement signal or measurement value, but in particular a vertical distance measurement value.
- the measured distance can be related to the connecting line 25 between the spreading clips 15 or the corners 16 of the transverse edge 17 of the item of laundry 10 held by them.
- the at least one sensor of the sensor device 21 is also designed in such a way that it supplies the measurement results very quickly, in particular measurement signals that follow closely in time.
- the sensor delivering analog measurement signals is designed in such a way that its measurement signals deliver an output measurement frequency of less than 20 ms, preferably less than 10 ms or even less than 5 ms.
- Such a sensor provides rapid analog measurement signals, in particular length and/or distance measurement values.
- the method according to the invention is explained below with reference to the device or input machine described above:
- the sagging of the transverse edge 17 is measured by the sensor device 21 arranged above the item of laundry 10, in particular above the transverse edge 17 thereof. This measurement takes place without contact using an optical and/or acoustic distance measurement.
- the perpendicular distance of the sensor device 21 or of the at least one sensor thereof to the transverse edge 17 is measured. As a result, the distance from the sensor device 21 to the transverse edge 17 of the item of laundry 10, in particular the lowest point 23, can be determined directly perpendicularly from above.
- the sensor device 21 has a single sensor which determines the deepest point 23 of the sagging transverse edge 17 of the item of laundry 10 .
- the sensor beam 26 of the sensor expands toward the transverse edge 17 in a conical or fan-shaped manner.
- one sensor of the sensor device 21 determines the deepest point 23 of the sagging transverse edge 17 once while the item of laundry 10 is being spread out. Provision is preferably made, however, for several successive or ongoing measurements to be carried out on point 23, which gradually moves upwards as the item of laundry 10 spreads out as a result of the spreading clamps 15 being spread apart, i.e. by constant and/or continuous measurements of the distance from the sensor of the sensor device 21, the respective position of the lowest point 23 and also to evaluate the measured values obtained in this way.
- the length of the transverse edge 17 of the item of laundry 10 is calculated arithmetically together with the likewise measured spacing of the expanding clamps 15 at least at the time of the or each measurement of the lowest point 23.
- the distance between the expanding clamps 15, like the sag, is continuously determined by displacement sensors or rotational angle measurements assigned to the expanding clamps 15 or their drives or carriages.
- Other common measurement methods for determining the current distance between the expansion clamps 15 of the expansion clamp pair during the expansion process can also be used.
- That spacing of the spreading clamps 15 can be determined, in particular calculated, at which the process of spreading out the item of laundry 10 and the spreading of the transverse edge 17 must be ended, so that there is no overstretching of the transverse edge 17 and/or damage to the item of laundry 10 occurs.
- the expanding clamps 15 are braked in a targeted manner, either reducing their speed when moving apart or bringing them to a complete standstill.
- the spreading of the laundry item 10 takes place in two steps, namely a pre-spreading and a final spreading. After the final spreading, the entire spreading process is over.
- the expanding clamps 15 are already slowed down at the end of the pre-spreading process when the sag of the transverse edge 17 has only been largely eliminated. This is an adjustable and predeterminable sag dimension.
- the pre-spreading process is terminated as soon as this amount of sag is reached. This can be done in different ways:
- the sensor device 21 arranged vertically at a distance above the transverse edge 17, in particular its sensor, measures the vertical distance of the lowest point 23 of the transverse edge 17 from the sensor at least once, preferably continuously, without contact. If the predetermined minimum sag is determined by the distance measurement, the drive of the expanding clamps 15 is braked, specifically reduced to a lower spreading speed.
- the expanding clamps 15 are decelerated to a lower speed when they move apart, as a result of which the rest of the spreading, ie the final spreading, takes place more slowly after the pre-spreading.
- the drive of the spreading clamps 15 is stopped completely and the item of laundry 10 is released from the spreading clamps 15 and placed on a deposit bar or a feed conveyor of the input machine.
- the spreading clamps 15 can be stopped completely when the final spreading position is reached in the same way as the spreading clamps 15 can be braked at the end of the pre-spreading process, i.e. depending on the vertical distance values of the lowest point 23 of the transverse edge 17 to the sensor of the sensor device 21 or the connecting line 25 between the spreading clamps 15 and the positions of the spreading clamps 15 calculated from this at the time of the end of the final spreading process.
- the sensor device 21 with a plurality of sensors lying next to one another on the connecting line 25 between the expanding clamps 15 .
- a distance profile of at least a part, preferably a central part, of the transverse edge 17 to the sensors or the connecting line 25 can be determined. This can make the calculation of the completion of the pre-propagation process and/or the final propagation process more accurate.
- Another possible embodiment of the method provides for the spreading clamps 15 to be moved apart when the item of laundry 10 is spread out, using a predefinable speed profile. Then the at least one sensor of the sensor device 21 continuously and/or continuously determines the current position of the deepest point 23 of the transverse edge 17 during at least a large part of the spreading process /or drives of the expanding clamps 15 are controlled or regulated in such a way that the desired speed profile is achieved. In this case, the expanding clamps 15 do not need to be driven at the same speed, in particular at the same high speed, until the end of the pre-spreading process. There is a smooth transition of the speed change, so that one can no longer speak of a pre-propagation process and a final propagation process. The boundaries between the two are then fluid.
- the vertically directed distance measurements can be taken from above onto the transverse edge 17 of the item of laundry 10 when Spreading can be carried out and evaluated very quickly, so that the deceleration or the change in speed of the spreader clamps 15, which are moved apart when the item of laundry 10 is spread out, can follow directly, in particular in real time, on the determination of the vertical distance to the transverse edge 17.
- a fast evaluation device and/or control are used in addition to fast analog sensors.
- the invention in particular the method according to the invention, is suitable not only for devices designed as input machines for spreading out items of laundry 10, but also for other devices in a laundry that spread out items of laundry 10.
- the invention is also suitable not only for the input machine shown and described, but for input machines of all kinds.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
- Treatment Of Fiber Materials (AREA)
- Control Of Washing Machine And Dryer (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017000209.6A DE102017000209A1 (de) | 2017-01-13 | 2017-01-13 | Verfahren und Vorrichtung zum Ausbreiten von Wäschestücken |
PCT/EP2018/000004 WO2018130418A1 (de) | 2017-01-13 | 2018-01-02 | Verfahren und vorrichtung zum ausbreiten von wäschestücken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3568516A1 EP3568516A1 (de) | 2019-11-20 |
EP3568516B1 true EP3568516B1 (de) | 2022-08-17 |
Family
ID=61002987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18700632.5A Active EP3568516B1 (de) | 2017-01-13 | 2018-01-02 | Verfahren und vorrichtung zum ausbreiten von wäschestücken |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3568516B1 (da) |
DE (1) | DE102017000209A1 (da) |
DK (1) | DK3568516T3 (da) |
WO (1) | WO2018130418A1 (da) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7440378B2 (ja) | 2020-08-28 | 2024-02-28 | 株式会社プレックス | 布類供給装置 |
EP4067563A3 (de) * | 2021-03-11 | 2023-01-18 | Herbert Kannegiesser GmbH | Verfahren und vorrichtungen zum zuführen von wäschestücken zu einer wäschereimaschine, wie insbesondere einer mangel |
DE102021118894A1 (de) | 2021-03-11 | 2022-09-15 | Herbert Kannegiesser Gmbh | Verfahren und Vorrichtung zum Zuführen von Wäschestücken zu einer Wäschereimaschine, wie insbesondere einer Mangel |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2283979A1 (fr) | 1974-09-04 | 1976-04-02 | Bora Sa | Appareil de transfert de pieces de linge |
DE3020428A1 (de) | 1980-05-29 | 1981-12-10 | E. & E. Peters, U. Wenck & Co Vertriebsgesellschaft Mbh, 2000 Hamburg | Vorrichtung zum zufuehren von waeschestuecken zu einer waeschestuecken zu einer waeschebehandlungsmaschine, wie einer mangel o.dgl. |
US4327510A (en) * | 1980-07-28 | 1982-05-04 | Grantham Frederick W | Multi-station laundry feeder |
DE4143069C2 (de) | 1991-12-27 | 2001-10-31 | Kannegiesser H Gmbh Co | Verfahren und Vorrichtung zum Zuführen von Wäschestücken zu einer Mangel |
DE4202380C2 (de) | 1991-12-27 | 1995-07-06 | Kannegiesser H Gmbh Co | Verfahren und Vorrichtung zum Zuführen von Wäschestücken zu einer Mangel |
CH696668A5 (de) | 1996-03-08 | 2007-09-14 | Jensen Ag Burgdorf | Verfahren zum Zuführen von Wäschestücken zu einem Bearbeitungsgerät sowie Zuführvorrichtung. |
DE102015011602A1 (de) * | 2015-09-10 | 2017-03-16 | Herbert Kannegiesser Gmbh | Verfahren und Vorrichtung zum Ausbreiten eines Wäschestücks |
-
2017
- 2017-01-13 DE DE102017000209.6A patent/DE102017000209A1/de not_active Withdrawn
-
2018
- 2018-01-02 DK DK18700632.5T patent/DK3568516T3/da active
- 2018-01-02 WO PCT/EP2018/000004 patent/WO2018130418A1/de unknown
- 2018-01-02 EP EP18700632.5A patent/EP3568516B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3568516A1 (de) | 2019-11-20 |
WO2018130418A1 (de) | 2018-07-19 |
DE102017000209A1 (de) | 2018-07-19 |
DK3568516T3 (da) | 2022-11-14 |
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