METHOD AND DEVICE FOR FEEDING ITEMS OF LAUNDRY TO A LAUNDRY TREATMENT APPARATUS, PREFERABLY A MANGLE
20220380970 · 2022-12-01
Assignee
Inventors
Cpc classification
International classification
Abstract
Laundry items are spread out by input machines having loading stations with a belt conveyor. The laundry item is placed on a front region of the belt conveyor and pulled further onto the belt conveyor. It is necessary to smooth the laundry item upstream of the belt conveyor using a smoothing machine, which can hinder the pulling of the laundry item onto the belt conveyor. The invention provides a pivotable smoothing means which is in an inactive position for initially pulling the laundry item onto the belt conveyor and is pivoted into an active position only after the laundry item has been initially pulled onto the lower belt conveyor. The laundry item is placed on the smoothing means only after it has been initially pulled onto the lower belt conveyor. Thus, when the laundry item is initially pulled onto the lower belt conveyor, it is prevented from slipping down therefrom.
Claims
1. A method for feeding items of laundry (10) to a mangle or another laundry treatment apparatus, comprising transferring one respective item of laundry (10) to a belt conveyor (21) of at least one loading station (12) and a smoothing means (37) for smoothing the item of laundry (10) is arranged upstream of the belt conveyor (21), transferring the item of laundry (10) from the at least one loading station (12) onto a spreading apparatus (13), from which the item of laundry (10) is spread out transversely to the feed direction (11) in which the item of laundry (10) is able to be fed to the laundry treatment apparatus, and feeding the spread-out item of laundry (10) at least by at least one feed conveyor (17) to the laundry treatment apparatus, wherein the smoothing means (27) is brought from an inactive position into an active position after the item of laundry (10) has been initially pulled onto the belt conveyor (21) in the feed direction (11), wherein in the active position the smoothing means (27) is supported below the item of laundry (10) for smoothing the part of the item of laundry (10), which is still located upstream of the belt conveyor (21), when pulled further onto the belt conveyor (21).
2. The method as claimed in claim 1, wherein the respective item of laundry (10) is placed or deposited on a placement region (26) on the starting portion of the belt conveyor (21) when the smoothing means (27) is in the inactive position, wherein the item of laundry (10) does not yet slide along the smoothing means (27).
3. The method as claimed in claim 1, wherein when the smoothing means (27) is located in the inactive position the respective item of laundry (10) is placed or deposited onto the placement region (26) of the belt conveyor (21) with a starting portion of a longitudinal strip (35) between opposing longitudinal edges (36) running in the feed direction (11).
4. The method as claimed in claim 1, wherein the smoothing means (27) is pivoted from the active position into the inactive position and vice-versa.
5. The method as claimed in claim 4, wherein in the active position an upper edge (34) or an upper sliding surface of the smoothing means (27) is located upstream of the placement region (26) and in the inactive position of the smoothing means (27) this upper edge (34) or the upper sliding surface is located below the placement region (26) or the front end region of the lower belt conveyor (21).
6. The method as claimed in claim 1, wherein the item of laundry (10) is pulled onto the belt conveyor (21) by driving the belt conveyor (21) with the upper run (25) thereof running in the feed direction (11).
7. The method as claimed in claim 6, wherein when the item of laundry (10) is pulled onto the belt conveyor (21), at least the longitudinal strip (35) of the item of laundry (10) is increasingly deposited on the upper run (25), whilst edge portions with the longitudinal edges (36) adjoining the longitudinal strip (35) on either side hang down on either side of the belt conveyor (21).
8. The method as claimed in claim 1, wherein after the item of laundry (10) has been deposited onto the placement region (26) of the belt conveyor (21), at least the longitudinal strip (35) is increasingly pulled by the driven belt conveyor (21) onto the upper run (25) of the belt conveyor (21).
9. The method as claimed in claim 1, wherein after the item of laundry (10) has been deposited onto the placement region (26) of the belt conveyor (21), at least the longitudinal strip (35) is increasingly pulled onto the upper run (25) of the belt conveyor (21) until a portion of the front transverse edge (16) of the item of laundry (10) which is located in the region of the longitudinal strip (35) is located in the region of an upper belt conveyor (22), which is arranged set back above the belt conveyor (21) in a sandwich-like manner, or after at least one part of the longitudinal strip (35) has been initially pulled onto the belt conveyor (21) the smoothing means (27) is transferred, preferably pivoted, into the active position for smoothing the rear part of the item of laundry which is still located upstream of the belt conveyor (21) and/or the smoothing means (27) thereof.
10. The method as claimed in claim 1, wherein after the item of laundry (10) has been deposited onto the placement region (26) of the belt conveyor (21), at least the longitudinal strip (35) is increasingly pulled onto the upper run (25) of the belt conveyor (21) and, after the at least one part of the longitudinal strip (35) has been initially pulled onto the belt conveyor (21), the smoothing means (27) is pivoted into the active position for smoothing the rear part of the item of laundry (10) which is still located upstream of the belt conveyor (21) and/or the smoothing means (27) thereof.
11. A device for feeding items of laundry to a mangle or another laundry treatment apparatus with at least one loading station (12) which has at least one belt conveyor (21) transporting one respective item of laundry (10) in the feed direction (11), and a smoothing means (27) is arranged on the starting portion thereof, with a spreading apparatus (13) which is arranged downstream in the feed direction (11) of the at least one loading station (12) for spreading out the item of laundry (10) transversely to the feed direction (11), and with at least one feed conveyor (17) for feeding the spread-out item of laundry (10) to the laundry treatment apparatus, wherein the smoothing means (27) of the at least one loading station (12) is able to be brought from an inactive position into an active position and vice-versa.
12. The device as claimed in claim 11, wherein the smoothing means (27) is pivotably arranged at a front end (24) of the belt conveyor (21) of the respective loading station (12), when viewed in the feed direction.
13. The device as claimed in claim 11, wherein the smoothing means (27) is pivotable at a front end (24) of the belt conveyor (21) of the respective loading station (12), when viewed in the feed direction, by driving about a horizontal pivot axis (28) running transversely to the feed direction (11).
14. The device as claimed in claim 11, wherein the at least one smoothing means (27) is pivotable in the inactive position below the belt conveyor (21) and is pivotable in the active position upstream of the front end (24) of the belt conveyor (21).
15. The device as claimed in claim 11, wherein the or each smoothing means (27) is configured in a C-shaped or horseshoe-shaped manner, by being pivotably mounted on the pivot axis (28) with parallel limbs (31) on opposing sides of a stationary support frame of the respective belt conveyor (21).
16. The device as claimed in claim 15, wherein the smoothing means (27) which is configured in a C-shaped manner has a U-shaped, omega-shaped or horseshoe-shaped design and in the active position an upper edge (34), or also at least one part of its outer face, serves as a support surface, bearing surface or sliding surface for the item of laundry (10).
17. The device as claimed in claim 11, wherein the narrow belt conveyor (21) has a width which is less than the width of the item of laundry (10) to be fed to the laundry treatment apparatus.
18. The device as claimed in claim 11, wherein the narrow belt conveyor (21) has a width which corresponds to the width of the longitudinal strip (35) between opposing outer longitudinal edges (36) of the respective item of laundry (10).
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Preferred exemplary embodiments the invention are described in more detail hereinafter with reference to the drawing. In the drawings:
[0023]
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
[0030]
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0031]
[0032] The device or input machine shown here has three loading stations 12 which are configured, in particular, identically. The three loading stations 12 are arranged adjacent to one another with the same spacing to one another in a row running transversely to the feed direction 11 on the front face of the device. The central loading station 12 is located, in the case of the three loading stations 12 shown here, in the center of the device or input machine. The two other loading stations 12 are arranged eccentrically on opposing sides of the central loading station 12. The invention is not limited to the three loading stations 12. It is also suitable for devices with a larger or smaller number of loading stations 12, including just one single loading station 12.
[0033] When viewed in the feed direction 11, a spreading apparatus 13 follows the loading station 12. The spreading apparatus 13 has at least two spreading clamps 14 forming a spreading clamp pair. The spreading clamps 14 are arranged on carriages which may be moved toward one another and apart on a horizontal rail 15 running transversely to the feed direction 11. In the device shown, the spreading apparatus 13 has two spreading clamp pairs, with in each case two spreading clamps 14. It is also conceivable that the spreading apparatus 13 has just one spreading clamp pair or more than two spreading clamp pairs.
[0034] Each spreading clamp 14 serves for holding one of the adjacent corners of a front transverse edge 16 of the respective item of laundry 10. By moving apart the two spreading clamps 14 of the respective spreading clamp pair the front transverse edge 16 of the item of laundry 10 is stretched by the spreading apparatus 13 in order to spread out the item of laundry 10 below the spreading apparatus 13. Preferably, the two spreading clamps 14 of the respective spreading clamp pair are moved such that they center at least large items of laundry 10, which have to be mangled in a single track, relative to the center of the device.
[0035] When viewed in the feed direction 11, a feed conveyor 17 follows the spreading apparatus 13. The item of laundry 10 which has been spread out and centered by the spreading apparatus 13 is deposited with the leading, stretched-out front transverse edge 16 by the spreading clamps 14 of the respective spreading clamp pair on a front starting portion of the feed conveyor 17 with a front spread-out transverse edge region of the item of laundry 10 adjacent to the stretched-out front transverse edge 16.
[0036] Alternatively, it is conceivable to arrange a so-called depositing strip on the starting portion of the feed conveyor 17. Then the spread-out or stretched front transverse edge region of the item of laundry 10 is deposited by the respective spreading clamp pair onto the depositing strip, which then deposits this front transverse edge region onto the feed conveyor 17.
[0037] The device shown has just one feed conveyor 11. It is also conceivable that the device has a plurality of successive feed conveyors, wherein it is also conceivable that one feed conveyor located upstream of the mangle of another laundry treatment apparatus is formed form two superimposed partial conveyors.
[0038] The item of laundry 10 lying spread-out and/or stretched-out on the upper run of the feed conveyor is transported from the feed conveyor 17 to the mangle, not shown in the figures, or another laundry treatment apparatus and at the same time introduced into the mangle or the laundry treatment apparatus.
[0039] Each loading station 12 has a loading conveyor 18 which transports the item of laundry 10 in the feed direction 11. Two corner locators 19 are assigned or arranged downstream of the respective loading station 12. Each corner locator 19 serves for determining and for holding one of the adjacent corners or corner regions of a second, originally rear, transverse edge of the item of laundry 10.
[0040] In the device or input machine shown here, transfer clamps 20 are provided between the two corner locators 19 of each loading station 12 and the spreading apparatus 13. The transfer clamps 20 assigned to each loading station 12 are combined to form a transfer clamp pair. The transfer clamps 20 form thereby a double clamp respectively for one of the opposing corners of the transverse edge of the item of laundry.
[0041] The transfer clamp pair of each loading station 12 is able to be moved by a carriage on a rail. The rail of the central loading station 12 runs in a linear manner in the feed direction 11 along the center of the input machine and the feed conveyor 17. Starting from the outer loading stations 12, longer rails run obliquely upward in the direction of the spreading apparatus 13. These two rails are of identical length, but oriented differently, so that their rear ends are oriented toward the center of the input machine but terminate upstream of the center, when viewed in the feed direction 11. The relevant item of laundry 10 is able to be transferred onto the spreading clamps 14 of the spreading apparatus 13 by the respective transfer clamp pair.
[0042] Each of the loading conveyors 18 of the loading stations 12 which are configured identically has two narrow belt conveyors 21 and 22 of identical width, with in each case at least one endless conveyor belt 23 which is able to be driven in a revolving manner. The belt conveyors 21 and 22 are arranged one above the other in order to form a sandwich conveyor, wherein the runs of the conveyor belts 23 of the belt conveyors 21 and 22, which are oriented toward one another, overlap in some regions. The lower belt conveyor 21 is longer than the upper belt conveyor 22. These belt conveyors 21 and 22 of different lengths are arranged one above the other in a sandwich-like manner such that, when viewed in the feed direction 11, the upper belt conveyor 22 is located downstream of a front end 24 of the lower belt conveyor 21 in order to form an exposed front region of an upper run 25 of the lower belt conveyor 21. This exposed front region of the upper run 25 of the lower belt conveyor 21 forms a placement region 26 for one respective item of laundry 10.
[0043] In the exemplary embodiment of
[0044] The drive of the two belt conveyors 21 and 22 may be implemented in different ways. For example, both belt conveyors 21 and 22 may be driven synchronously, but also just one of the belt conveyors 21 and 22 may be driven, wherein the other belt conveyor 21 or 22 is then entrained by being pulled along by the driven belt conveyor 21 or 22.
[0045] A smoothing means 27 is provided at the starting portion, namely a front end 24, of the lower belt conveyor 21 of each loading station 12. Preferably, the smoothing means 27 of all of the loading stations 12 are configured identically and arranged identically.
[0046] The respective smoothing means 27 is arranged or mounted in the region of the front end 24 upstream of the lower belt conveyor 21. In the exemplary embodiment shown, the respective smoothing means 27 is arranged so as to be pivotable with the front end 24 or in the region of the front end of the lower belt conveyor 21. Alternatively, the respective smoothing means 27 may be also displaceably arranged in the region of the front end 24 of the lower belt conveyor 21.
[0047] In the exemplary embodiment shown in the figures, the smoothing means 27 of each loading station 12 is pivotably arranged and/or mounted upstream of the lower belt conveyor 21 such that the smoothing means 27 is pivotable about a horizontal pivot axis 28 running transversely to the feed direction 11, and namely by a suitable actuating means, for example a pneumatic cylinder, not shown in the figures. The pivot axis 28 is located adjacent to and/or below an axis of rotation 29 of an optionally driven deflection roller 30 at the front end 24 of the lower belt conveyor 21. Alternatively, the pivot axis 28 of the smoothing means 27 may also be located on the axis of rotation 29 of the deflection roller 30. The smoothing means 27 is not then pivotable about the pivot axis 28 but pivotable about the axis of rotation 29 on a concentric path.
[0048] The respective smoothing means 27 is pivotable via the actuating means or the drive about the pivot axis 28 from an inactive position into an active position and back again. The inactive position is shown in
[0049] The smoothing means 27 of each loading station 12 shown in the figures is configured in a C-shaped, for example U-shaped (
[0050] In the exemplary embodiment of
[0051] The smoothing means 27 configured according to
[0052] In the exemplary embodiment shown, the upper edge 34 of the smoothing means 27 runs approximately parallel to the placement region 26 or upper run 25 of the lower belt conveyor 21. Alternatively, however, it may also run slightly obliquely and namely rising slightly in the feed direction 11.
[0053] In the inactive position, the respective smoothing means 27 is pivoted below the front end 24 of the lower belt conveyor 21 (
[0054] The method according to the invention is described hereinafter with reference to the above-described device (input machine):
[0055] One respective item of laundry 10 is placed automatically, or by an operator, with a front part onto the placement region 26, in particular the exposed upper part of the upper run 25 on the lower belt conveyor 21. In this case, the smoothing means 27 is located in the inactive position, in particular below a front end region of the lower belt conveyor 21.
[0056] Only a starting portion of the longitudinal strip 35 of the item of laundry 10, starting from the front transverse edge 16 running transversely to the feed direction 11, is placed on the placement region 26 of the lower belt conveyor 21. The longitudinal strip 35 has a width which approximately corresponds to the width of the loading conveyor 18, in particular its lower belt conveyor 21. The longitudinal strip 35 is located between the opposing longitudinal edges 36 of the item of laundry 10. These longitudinal edges 36 run in the feed direction 11. At the end of the item of laundry 10 is located a rear transverse edge 37 thereof. Preferably, the longitudinal strip 35 extending in the feed direction 11 is located centrally or at least approximately centrally between the longitudinal edges 36 on opposing sides of the item of laundry 10. This results in a U-shaped configuration of the item of laundry 10 after a front part of the longitudinal strip 35 has been placed on the placement region 26. In this case, the outer edge portions 38 of the item of laundry 10 hang down on opposing sides from the narrow belt conveyor 21. Due to the narrow lower belt conveyor 21 which preferably only corresponds to approximately a tenth, up to a twentieth, of the width of large items of laundry 10, the longitudinal strip 35 between the longitudinal edges 36 also has a relatively small width so that with large items of laundry 10 relatively large edge portions 38 hang down in any case on opposing sides from the lower belt conveyor 21 (
[0057] The loading conveyor 18 of each loading station 12 is either continuously driven or already driven when the front part of the longitudinal strip 35 of the item of laundry 10 has been placed on the placement region 26, or it is driven only after the front part of the longitudinal strip 35 has been placed on the placement region 26. When the loading conveyor 18 is driven, the upper run 25 of the conveyor belt 23 of the lower belt conveyor 21 and also an upper run of the belt 23 of the upper belt conveyor 22 move synchronously in the feed direction 11.
[0058] After the placement of the front part of the longitudinal strip 35 of the item of laundry 10 onto the placement region 26 of the lower belt conveyor 21, a large part of the item of laundry 10 is still located upstream of the front end 24 of the lower belt conveyor 21. Primarily with large items of laundry 10, this may lead to the frictional force between the upper run 25 of the lower belt conveyor 21 in the placement region 26 and the part of the item of laundry 10 located thereon, and namely the starting portion of the longitudinal strip 35 which starts from the front transverse edge 16, being insufficient in order to transport the item of laundry 10 in the feed direction 11 and at the same time to pull the item of laundry 10 further onto the upper run 25 of the lower belt conveyor 21. Then a slippage occurs between the item of laundry 10 and the upper run 25. This slippage may lead to the front part of the item of laundry 10 slipping down from the upper run 25 of the placement region 26. In order to avoid such a slippage or the item of laundry 10 possibly slipping down from the front end 24 of the lower belt conveyor 21, when the front part of the longitudinal strip 35 is placed onto the placement region 26 and when the item of laundry 10 is initially pulled onto the lower belt conveyor 21, the smoothing means 27 is in the inactive position below the front end 24 of the lower belt conveyor 21 (
[0059] Only when the item of laundry 10 is pulled sufficiently far onto the lower belt conveyor 21, in particular a part of the longitudinal strip 35 extending beyond the placement region 26 is pulled by a frictional contact on the upper run 25 of the lower belt conveyor 21, is the respective smoothing means 27 pivoted up into the active position (
[0060] Preferably, it is provided that the smoothing means 27 is brought into its active position as soon as the starting portion of the longitudinal strip 35, namely the inner or central portion of the front transverse edge 16 of the item of laundry 10 extending over the longitudinal strip 35, has entered a starting portion of a gap between the runs of the lower belt conveyor 21 and the upper belt conveyor 22 oriented toward one another. Then the item of laundry 10 is pulled by the respective loading conveyor 18 with sufficient force into the gap and thereby continuously advanced in the feed direction 11, wherein the item of laundry 10 is pulled increasingly onto the lower belt conveyor 21. As a result, there is no longer the risk that the item of laundry 10, when pulled over the smoothing means 27 located in the active position, is not able to be transported further or even slips down again from the lower belt conveyor 21 counter to the feed direction 11.
[0061] After the rear transverse edge 37 of the respective item of laundry 10 has moved beyond the smoothing means 27 and/or the rear transverse edge 37 of the item of laundry 10 has passed the front end 34 of the lower belt conveyor 21, the smoothing means 27 is pivoted back again into the inactive position. The loading station 12 is then ready to accept a subsequent item of laundry 10.
LIST OF REFERENCE NUMERALS
[0062] 10 Item of laundry [0063] 11 Feed direction [0064] 12 Loading station [0065] 13 Spreading apparatus [0066] 14 Spreading clamp [0067] 15 Rail [0068] 16 Front transverse edge [0069] 17 Feed conveyor [0070] 18 Loading conveyor [0071] 19 Corner locator [0072] 20 Transfer clamp [0073] 21 Lower belt conveyor [0074] 22 Upper belt conveyor [0075] 23 Conveyor belt [0076] 24 Front end [0077] 25 Upper run [0078] 26 Placement region [0079] 27 Smoothing means [0080] 28 Pivot axis [0081] 29 Axis of rotation [0082] 30 Deflection roller [0083] 31 Limb [0084] 32 Web [0085] 33 Tip [0086] 34 Edge [0087] 35 Longitudinal strip [0088] 36 Longitudinal edge [0089] 37 Rear transverse edge [0090] 38 Edge portion