Abstract
A dosing system for cleaning liquids in the field of commercial cleaning having a storage volume and a dosing device arranged on the storage volume as well as a corresponding dosing method.
Claims
1. A dosing system (1) for cleaning liquids in the field of commercial cleaning having a storage volume (2) and a dosing device (3) arranged on the storage volume (2), wherein the dosing device (3) has a pipe section (4), which communicates with the storage volume (2), and a hollow piston (5), which is movably guided in said pipe section, wherein a hollow space (6) of the hollow piston (5), which is in the first position (7), can be accessed from the storage volume (2), and the hollow space (6) of the hollow piston (5), which is in a second position (8), communicates with a surrounding area of the dosing system (1), wherein the hollow piston (5) has two front face covers (10, 11), which are spaced apart from one another by means of a spacer (9) and which define a dosing volume (33) between one another, characterized in that the spacer (9) is embodied as cylinder jacket section (12) and/or as a column-like web (13), wherein the web (13) is embodied so as to be connected to a front face cover (10, 11), wherein the hollow piston (5) is interchangeable, wherein a front face cover (10, 11) has a compensation weight (38), in particular a compensation weight (38), which is arranged in such a way that, in the second position (8), it rests on a storage volume-side edge (39) of the pipe section (4).
2. The dosing system (1) according to claim 1, characterized in that the pipe section (4) is embodied cylindrically and has at least one first wall opening (35) on its end (34), which faces away from the storage volume, and/or has at least one second wall opening (37) on its end (36) on the storage volume side.
3. The dosing system (1) according to claim 1, characterized in that it has more than one hollow piston (5), in particular several hollow pistons (5), which each differ in their dosing volume (33), preferably due to different spacer volumes.
4. The dosing system (1) according to claim 1, characterized in that the spacer (9) is embodied in a column-like manner.
5. The dosing system (1) according to claim 1, characterized in that it has a collection tray (14), which is spaced apart from the storage volume (2).
6. The dosing system (1) according to claim 5, characterized in that an actuating element (15), which acts on the hollow piston (5), is provided, in particular a mechanically acting actuating element (15), preferably one, which acts purely mechanically, wherein the actuating element (15) is arranged in the collection tray (14), and has an active end (16) acting on the hollow piston (5), wherein the collection tray (14) is preferably embodied so as to be spaced apart from an end (17) of the pipe section (4), which is at a distance from the storage volume (2), and wherein the actuating element (15) is preferably embodied so as to be articulated on the collection tray (14), in particular a tilt lever (18) is arranged between actuating element (15) and active end (16).
7. The dosing system (1) according to claim 6, characterized in that the remote end (17) has an outlet opening (19) in the pipe section (4).
8. The dosing system (1) according to claim 1, characterized in that it is embodied for wall assembly, and/or has a cover and/or a pressure compensation device.
Description
(1) The invention will be described in an exemplary manner in a preferred embodiment with reference to a drawing, wherein further advantageous details can be gathered from the figures of the drawing.
(2) Parts with identical function are thereby provided with identical reference numerals.
(3) In detail, the figures of the drawing:
(4) FIG. 1 shows a device according to the invention in first embodiment on a cleaning system trolley,
(5) FIG. 2 shows the actuation according to the invention of the device in first embodiment,
(6) FIGS. 3a, 3b and 3c show a first embodiment of the hollow piston according to the invention in three partial figures,
(7) FIGS. 4a, 4b and 4c show a second embodiment of the hollow piston according to the invention in three partial figures,
(8) FIGS. 5a and 5b show a third embodiment of the hollow piston according to the invention in two partial figures,
(9) FIG. 6 shows a detailed view of the storage volume according to the invention,
(10) FIG. 7 shows a preferred embodiment of the invention on a cleaning system trolley,
(11) FIG. 8 shows a preferred embodiment of the pipe section, and
(12) FIG. 9a and FIG. 9b show a fourth and preferred embodiment of the hollow piston according to the invention in two partial figures.
(13) FIG. 1 shows the arrangement of the invention on a cleaning system trolley 22, which is illustrated in a simplified manner, in the case of which, for the sake of clarity, only one embodiment of the dosing system 1 according to the invention is illustrated. The arrangement on a larger cleaning system trolley 22, which would then have further containers, appliances and devices, would also be in accordance with the invention. Instead of an arrangement on such a cleaning system trolley 22, a wall assembly of the dosing device would also be in accordance with the invention, if the latter is required, for example, in a stationary manner, due to the local conditions or the desired cleaning sequences. In this case, the described cover would not be optional, the cleaning solution in the storage volume, which is covered and is largely closed off against the surrounding area in this way, would thus possibly be available for days. According to the invention, a pressure compensating option would also be arranged on the cover and/or storage volume in this case, possibly also comprising air filter, so as not to obstruct the removal of the cleaning liquid, when the storage volume empties slowly.
(14) The dosing system 1 according to the invention has essentially two assembly groups, namely on the one hand, the storage volume 2, which is illustrated in a partially cut manner here, comprising pipe section 4 and a hollow piston 5, which is arranged so as to slide in said pipe section, and, on the other hand, a collecting tray 14, arranged at a distance below a lower end 17 of the pipe section 4, which is spaced apart from the storage volume 2. In the collection tray 14, an actuating element 15 can be seen, which is inserted in a recess 23 of the front wall 24 of the collection tray 14 and is thus articulated therein in a releasable manner. This actuating element 15 is a wire frame made of stainless steel, which is embodied so as to be connected to a tilt lever 18 via plastic connectors or wire brackets per frame 25. A user actuates the dosing system 1, in that his moves the mop plate of a mop holder, which is covered with a mop cover, between these two assembly groups and pushes on the actuating element 15. The latter then moves the hollow piston 5 into a first position, in which the hollow space 6 of the hollow piston is accessible for a cleaning solution located in the storage volume 2 in the use case. When the user no longer exerts pressure, the hollow piston 5 slides in a gravity-driven manner back into a second position, which represents its normal or initial position, respectively. In this position, the hollow space 6 thereof is embodied so as to be connected to a surrounding area of the device 1. FIG. 1 shows this very clearly. In other words, the first position in the case of this embodiment is that, in which the hollow piston 5 is raised, so that its front face cover 10, which is visible here, is located significantly above the bottom of the storage volume 2 and cleaning agent can flow into the hollow space. It goes without saying that the storage volume 2 can be provided with a cover, which closes it to the top, in particular so as to form a seal, so that no dirt and no objects can fall into it. An embodiment, in the case of which for example one or several channels lead from the storage volume 2 to the pipe section 4 and penetrate the wall thereof, so that they lead laterally to the hollow piston 5 and a lateral flow-in is made possible, is also in accordance with the invention. First and foremost, a position, which is sealed against the entrance of cleaning solution into the hollow space 6 and which can be accessed for this purpose, of the hollow piston 5 relative to the storage volume 2 is important for the invention.
(15) FIG. 2 shows the collection tray 14 as section, comprising recess 23 in the front wall 24, into which the actuating element 15, here in the form of a wire bracket, is inserted and articulated. The wire brackets forms a pressure plate, which is embodied so as to be connected to a tilt lever 18, here in each case by means of plastic connectors 27, via a frame 25. The tilt lever 18 is mounted in a lead-through 27 of the pipe jacket 20 so as to be rotatable about an axis of rotation, and acts with an active end 16 on the hollow piston 5, in particular on the lower front face cover 11 thereof, more exactly on a contact element 21, which is embodied here as guide groove 32. The hollow piston 5 is illustrated in a cut manner in FIG. 2, wherein the sectional plane runs through the guide groove 32, and wherein the lower front face cover 11 is embodied integrally to the hollow piston 5. The sealing situation between bottom of the storage volume 2, which is illustrated in a cut manner, the upper front face cover 10, and the transition between pipe section 4 and this bottom can also be seen well. Seals, which may be present, are omitted.
(16) The axis of rotation is formed by the two sections, which face one another, of the tilt lever 18, which is embodied as wire bracket, and which each permeate the pipe jacket 20. The illustrated position of the hollow piston 5 corresponds to its second position, which is to also be identified as lower dead point, or as rest position.
(17) The alternative according to the invention is not illustrated, in the case of which the actuating element 15 is a mechanical actuating element, which is guided below the storage volume and which in particular protrudes laterally, for example like in shaft comprising cams and operating handle, like lever or wheel, or an actuating element, which is guided downward, like a pedal or foot switch. The exact embodiment of the actuating element is not mandatorily significant for the invention, as long as it is preferably one, which can be actuated mechanically, so as not to have to provide an electrical supply. Further aspects, which need to be considered, are a secure footing of a user, a least possible position change of the operator to the device during the operation thereof, and, if possible, also a hand contact-free operation, in order to be able to also meet demands of clean rooms. Even a motorized actuating element would be in accordance with the invention, if it takes into account the other aspects as completely as possible in spite of the disadvantages.
(18) FIGS. 3a, 3b, and 3c show an embodiment of the hollow piston according to the invention in three partial figures. In the case of this embodiment, the dosing device 1 has three hollow pistons 5a, 5b and 5c, which are interchangeable, and which are each constructed identically, but have hollow spaces 6a to 6c, which are dimensioned differently to one another. A lower front face cover 11a-c is in each case connected to a two-piece spacer 9a-c by means of a substance-to-substance bond here, each part of which is embodied as cylinder jacket section 12a-c comprising wall thicknesses, which differ from one another. Viewed in the cross section, these cylinder jacket sections are in each case embodied as segment of a circle. A chute 28a-c provides for a controlled outflow of cleaning solution contained in the hollow space 6, wherein the size of the hollow spaces 6a-c is in each case defined by the different wall thicknesses of the cylinder jacket sections 12a-c. A seal 29, which is embodied so as to seal the hollow piston 5a-c against the non-illustrated inner wall of the pipe section 4, is in each case arranged in the area of the lower and of the upper front face cover 11, 10. The upper front face cover 10a-c is made of high-grade steel or a high-alloyed, rust-free and autoclavable steel, respectively, and, according to the invention, in each case shows a marking 30 for specifying volume.
(19) FIGS. 4a, 4b and 4c show a second embodiment of the hollow piston 5 according to the invention in three partial figures, in three positions each. In the case of this embodiment, the dosing device 1 according to the invention only has one hollow piston 5, the size of the hollow space 6 of which is embodied so as be capable of being set. This is attained according to the invention in that three spacers 9 are provided, which are embodied so as to be divided differently in their length and which, by means of a rotation of the two front face covers 10, 11 against one another, simultaneously change the distance thereof to one another. In the illustrated embodiment, a larger part of the axial length of the spacer 9 and thus of the distance between the two front face covers 10, 11, is realized by means of first spacer sections 9-1, which are integrally molded to the upper front face cover 10 and which are embodied of identical length to one another. Second spacer sections 9-2 are integrally molded to the lower front face cover 11 and have different lengths to one another, in particular more lower spacer sections 9-2 than upper spacer sections 9-1 are provided, wherein n spacers 9-1 and 2n or 3n lower spacers 9-2 are provided in each case. Two or three volumes can thereby be realized in an advantageous manner. According to the invention, a rotation lock of the two front face covers 10, 11 against one another is provided, which, in the preferred simplest case, is formed in that a lower spacer 9-2 of shorter axial length is embodied so as to be framed by two axially longer spacers 9-2. A stop can be integrally molded as rotation lock on the end side for the lower spacer 9-2 comprising the greatest axial length. The setting of the size of the hollow space 6 is thereby made possible in upper dead-center position of the hollow piston, thus in the first position 7 thereof, in the case of which the upper front face cover 10 can be seized by a user in the storage volume 2.
(20) In the three rows V1, V2 and V3, FIGS. 4a, 4b and 4c show a sequence of hollow piston positions in the case of three different hollow space sizes. The first column in each case shows the second position, in the case of which the inner hollow space 6 is in contact with a surrounding area, while the upper front face cover 10 seals the cleaning agent volume located above. It can be seen well that the hollow piston 5 according to the invention consists of two independent parts here, which can be released from one another, which define the hollow space 6 between one another. The second column in each case shows an intermediate position, in the case of which an operator actuates the non-illustrated actuating element 15 and has thus moved the lower front face cover 11 by means of the active end 16, guided in the guide groove 32 (see FIG. 2) in the pipe in the direction of the upper front face cover 10. The lower front face cover 11 thus seals the pipe section 4 against the surrounding area. In the third, right-hand column, the first position is illustrated, in the case of which the hollow space 6 from the non-illustrated storage volume 2 is can be accessed for cleaning solution. This is suggested by means of an arrow. It can also be seen that volume V1 is smaller than the volume V2, which is smaller than the volume V3, in each case created by the setting of the axial total length of the three spacers 9, which are radially spaced apart identically and which in each case consist of an upper and a lower partial spacer 9-1, 9-2, which each have an axial partial length.
(21) FIGS. 5a and 5b show a third embodiment of the hollow piston 5 according to the invention in two partial figures. In the case of this embodiment, the spacer 9 between the upper and the lower front face cover 10, 11 is embodied as web, which is branched in a star-shaped manner in the cross section, and which divides the hollow space 6 into identical or non-identical partial volumes V.sub.n, two identical and one different partial volume are illustrated, the latter is not visible behind the rearward wall of the spacer 9. This web extends across the entire distance between the two front face covers 10, 11 and has closed walls. This hollow piston 5 thus has an unchangeable distance between upper and lower front face cover 10, 11. One sealing 29 can in each case be seen in the transition area of the upper or lower front face cover 10, 11, respectively, to the spacer 9.
(22) All embodiments of the hollow piston 5 have in common that the respective hollow volume 6 is defined by the front face covers 10, 11, which are in each case embodied so as to form a seal, and an inner wall of the pipe section 4, in which the hollow pistons 5 are embodied so as move in a sliding manner. Even though a hollow piston 5 cannot be used on its own with this, material is saved and the covers can be embodied as simple turned parts comprising closed, smooth surfaces. In the case of this embodiment, the dosing volume can also be set by means of rotation, but this time of the entire hollow piston 5 relative to an outlet opening 19 of the pipe jacket 20 of the pipe section 4: If the hollow piston 5 is rotated by a user in such a way that the outlet opening 19 covers two partial volumes, the respective partial volumes thereof add up to a total cleaning agent volume, as illustrated in partial figure FIG. 5b).
(23) Partial figure FIG. 5b) shows a schematic cross section through the star-shaped spacer 9. Three partial volumes V1 to V3 can be seen, which add to a total volume and which, together, form the hollow space 6. Five cleaning agent volumes, namely V1, V2, V3, V1+V2 and V2+V3, for example 50 ml, 150 ml, 200 ml, and 300 ml, can thus be realized with these three partial volumes, which is suggested by means of boxes. In the case of this embodiment, the upper front face cover 10 also has a marking 30 of the individual position, which releases the respective volume.
(24) FIG. 6 shows this once again from a different perspective. The marking 31, which is arranged on the bottom of the storage volume 2, can be seen, to which the marking 30 is to be arranged so as to be aligned, in order to dispense the desired volume of cleaning solution. The hollow piston 5 is illustrated in its second position, in the case of which the hollow space 6 is in communication with the surrounding area. The lower sealing ring 29 as well as the outlet opening 19 in the pipe jacket 20, the active end 16 of the tilt lever 18, and a part of the frame 25 can be seen. Collection tray 14 and storage volume 2 are suggested in a cut manner.
(25) FIG. 7 shows a preferred embodiment of the invention on a cleaning system trolley 22. In the case of this embodiment, the collection tray 14 comprising actuating element 15 arranged thereon is also arranged spaced apart from a storage volume 2. In the case of this embodiment, the actuating element 15 also has an active end 16, which acts on the hollow piston 5. The pipe section 4, which is cylindrical here, ends in the area of the collection tray, thus below the edge thereof. This prevents a splashing of cleaning solution and thus provides for clean work. The actuating element 15 is inserted into recesses of the edge of the collection tray 14 and can thus be removed easily for cleaning. The collection tray 14 is embodied with a bent bottom surface, the inclined part of which is arranged in the area of the end 34 of the cylindrical pipe section 4 facing away from the storage volume, so that the cleaning liquid escaping there flows in the direction of a mop cover, which actuates the device. This ensures clean work as well as a consistent wetting capacity, because the cleaning solution always flows to the mop cover. Details with regard to the preferred embodiment of the pipe section are illustrated in more detail in FIG. 8, but it can already be seen in FIG. 7 that it can be releasably fastened to a storage container bottom from below, in particular fastened so as to clamp this bottom, by means of a nut 40. This nut 40 can also be a cap nut. A fastening by means of quick coupling, bayonet closure and the like would also be in accordance with the invention.
(26) FIG. 8 shows a preferred embodiment of the pipe section 4 in the longitudinal section. The lower end 34, which faces away from the storage volume, has three first wall openings 35, which are embodied as through bores and have an angular distance of 120 to one another. The cross sectional surface sum thereof, which is rather low as compared to the dosing volume, advantageously ensures a rather slow emptying of the dosing volume, so that clean work is made possible. These first wall openings 35 are located so close to the end 34, which faces away from the storage volume that they are flush with the upper edge of a lower front face cover 11 (see FIGS. 9a) and 9b)), whereby a dead volume is advantageously avoided. In other words, no cleaning solution exits through the lower axial opening of the cylindrical pipe section 4, the latter is embodied so as to be sealed by the hollow piston 5. The number, the angular distance, and the size of these first wall openings can thereby be selected variably according to the invention, as long as a sufficiently slow outflow is ensured.
(27) The upper end 36 on the storage volume side has an external thread 41, onto which the cap nut 40 can be screwed. A circumferential support web 42 and a plurality of second wall openings 37 are arranged above the external thread 41. This embodiment of the pipe section 4 can be inserted into a storage volume 2 from the top and rests with the support web 42 on the bottom thereof, in particular so as to form a seal, in the inserted state. To releasably fasten the pipe section 4, the nut 40 can be slid on from the opposite, lower end and can be screwed-connected in the direction of the support web 42. As already mentioned, a bayonet closure, a quick coupling or any other connecting device, which can be released and cleaned easily, instead of a nut is also in accordance with the invention.
(28) In the use state, the end 36 on the storage volume side protrudes with its edge and its two wall openings 37 into the storage volume. An upper front face cover 10 bears on the edge, but a cleaning solution cannot yet reach into the hollow piston 5 in this position (see FIGS. 9a) and 9b)). A quick inflow of the cleaning solution is ensured according to the invention by means of the plurality of second wall openings 37 and the upper axial opening of the pipe section 4, because cleaning solution can flow through all of these openings in the first position of the hollow piston into the dosing volume thereof.
(29) FIGS. 9a) and 9b) show a fourth and preferred embodiment of the hollow piston according to the invention in two partial figures, each in side view. Upper front face cover 10, lower front face cover 11, spacer 9, here as web 13, namely as column-like web 13, which is round in the cross sectional surface, can be seen here. FIG. 9a) shows a hollow piston 5 comprising small dosing volume 33, formed between the column-like spacer 9 and a wall surface of the cylindrical pipe section 4, here suggested in a dashed manner. An upper and a lower sealing ring 43, which seal the dosing volume 33 against the wall surface, can further be seen. The upper front face cover 10 is thereby divided into two axial areas comprising different radii, the radially greater one of which rests on the edge of the pipe section, and the radially smaller one of which is arranged in the interior of the pipe section, for instance in the area of the second wall openings 37. The upper front face cover 10 is thus embodied with a significantly greater axial length than the lower front face cover 11, because, in addition to the sealing function, it also fulfills a weight compensation function and a quick inflow function. FIG. 9b) shows this.
(30) FIG. 9b) shows a hollow piston 5 according to the invention comprising greater dosing volume 33, effected by a column-like spacer 9 comprising smaller diameter. In particular the embodiment of the upper front face cover 10 with a compensation weight 38 can be seen here. In the case of this embodiment, the density of the piston material is significantly greater than that of the cleaning solution, so that the lower volume of the column-like spacer 9 is compensated by the compensation weight 38 according to the invention, so that the total weight of a filled hollow piston 5 across all different hollow pistons is identical. The sinking behavior thereof in the pipe section 4 is thereby also identical, a user of the device according to the invention thus always experiences the same behavior of the system, regardless of the size of the dosing volume. In the empty state, the hollow piston thereby also sinks into the second position, in a gravity-driven manneror, in other words, also every hollow piston of a different weightbut a similarity of the pistons is advantageous for a user.
(31) As cylindrical body, such a hollow piston 5 can be produced as injection molded part or as turned and/or milled part in a simple manner.
(32) The invention thus specifies a dosing system comprising changeable dosing volume, in that either a single hollow piston can be changed in its dosing volume by means of a settable distance of its front face covers to one another by changing the length of the spacer or spacers, orpreferablyby providing a plurality of hollow pistons, which preferably do not differ in their relevant external dimensions, but in their respective spacer volume and thus in the respective dosing volume, and which, however, thereby have an identical total mass of hollow piston and dosing amount to the greatest possible extent. In an advantageous manner, this embodiment allows for the use of the same device for wetting a large variety of mop covers or, more generally, surfaces, which are to be contacted with cleaning solution, which require different amounts of cleaning solution. As a result of the change according to the invention of the dosing volumes of the hollow piston, structurally complex dosing volume setting mechanism, which are difficult to clean, are avoided in an advantageous manner, in particular also those comprising rotating parts, drives, displays, time-dependent opening times, etc. The simplest structural solutions are often the preferred ones, especially in the field of commercial cleaning.
(33) In a highly advantageous manner, the hollow spaces of the hollow bodies, which are to be cleaned, can be accessed easily, the device avoids all active drives in the form of motors, springs or similar return elements and eliminates the operating time dependency of the dosing by using the force of gravity in an advantageous manner: A user can push the actuating element as he pleases for as long as he wants, without resulting in a cleaning agent overdosage. In a highly advantageous manner, the entire device can be autoclaved and thus meets the highest demands on hygiene. In a highly advantageous manner, the dosing volume according to the invention is automatically self-filling by means of a purely linear movement of the hollow piston according to the invention into a first position, and self-emptying in its second position.
LIST OF REFERENCE NUMERALS
(34) 1 dosing system 2 storage volume 3 dosing device 4 pipe section 5 hollow piston 6 hollow space 7 first position 8 second position 9 spacer 10 front face cover 11 front face cover 12 cylinder jacket section 13 web 14 collection tray 15 actuating element 16 active end 17 farthest end 18 tilt lever 19 outlet opening 20 pipe jacket 21 contact element 22 cleaning system trolley 23 recess 24 front wall 25 frame 26 connector 27 lead-through 28 chute 29 seal 30 marking 31 marking 32 guide groove 33 dosing volume 34 end facing away from the storage volume 35 first wall opening 36 end on the storage volume side 37 second wall opening 38 compensation weight 39 edge on the storage volume side 40 nut 41 external thread 42 support web 43 sealing ring
