DE102015000903B4 - Ejection line arrangements for a bottle attachment device - Google Patents

Abstract

The invention relates to an ejection line arrangement for a bottle attachment device (1) for handling liquids, the bottle attachment device (1) having a cylinder-piston arrangement (5) for sucking in and ejecting a liquid, a valve block arrangement (4), possibly a valve block arrangement ( 4) accommodating outer housing (6), a fastening arrangement (3) for fastening the outer housing (6) and/or the valve block arrangement (4) on a storage bottle (2) or the like. and a discharge line arrangement (7'), wherein the discharge line arrangement (7') is attached to the valve block arrangement (4) and/or to the outer housing (6) and from the valve block arrangement (4) and/or the outer housing (6) protrudes forwards, with a cantilever-like holder (8), an ejection line (7) arranged and guided in the holder (8) and ending in a tip (9), and a preferably made of plastic attached to the ejection line arrangement (7'). existing retaining tab (10) with a closure cap (11) attached to it at the end, with which the tip (9) of the ejection line (7) can be closed, with the closure cap (11) preferably being captive on the retaining tab (10), but around its longitudinal axis is rotatably mounted. This is designed particularly expediently in that the retaining tab (10) is pivoted at its end attached to the ejection line arrangement (7') by means of a rotary joint (17) which has a physical axis of rotation (18).

Description

The invention relates to discharge line arrangements for a liquid handling bottle attachment device having the features of the preamble of claim 1 and claim 11. The invention also relates to a liquid handling bottle attachment device having the features of the preamble of claim 12.

When bottle attachment devices for handling liquids is about the exact measurement and delivery of liquids from a storage bottle or other storage container, the exact measurement when recording a liquid partial volume from the storage bottle or the like. into the device and/or when dispensing a partial volume of liquid from the device to the outside into a container.

Bottle-top devices of the type in question are, in particular, bottle-top dispensers and burettes. Bottle attachment devices of this type are used extensively in chemistry, biology and pharmacy, in the laboratory and in production.

In the present context, the term “liquid” preferably designates liquids such as are used in chemistry, biology, pharmacy, etc. in the laboratory and in production. These are preferably liquids with a relative viscosity of up to about 300 (viscosity based on the viscosity of water, measured under standard conditions). Colloquially, the liquids are preferably those in the range from very thin to slightly viscous.

In the case of bottle attachment devices of the type in question, high demands are placed on the volumetric accuracy of liquid intake and/or liquid dispensing and on operator safety. The bottle attachment devices are usually operated by hand or driven by an actuator.

A typical example of a bottle top device in the form of a bottle top dispenser is from EP 0 542 241 A2 known. The present invention is based on this state of the art. For bottle-top devices in the form of bottle-top dispensers, the disclosure content of the EP 0 542 241 A2 referenced.

A bottle attachment device in the form of a burette is an example from EP 2 799 141 A2 known. A bottle-top device in the form of a burette has many structural details in common with a bottle-top device in the form of a bottle-top dispenser. In this respect, too, the disclosure content of the EP 2 799 141 A2 referred.

Here and in the following, a bottle attachment device is always described in its operating position, ie in its position attached to a storage bottle or the like. and substantially plumb. Correspondingly, a valve block arrangement for such a bottle attachment device is also described, ie also in its operating position, ie installed in a bottle attachment device which is in its operating position.

An essential part of a bottle attachment device of the type in question is the cylinder-piston arrangement, with the help of which the liquid can be sucked in and ejected again. This has a cylinder defining a longitudinal direction and a piston that is guided in a sealed, longitudinally displaceable manner in the cylinder. In an upward movement of the piston out of the cylinder, the liquid is sucked in by creating a vacuum in the cylinder. In a downward movement, the liquid in the cylinder is expelled from the cylinder again. The flow of the liquid, on the one hand during intake and, on the other hand, during discharge, is directed by valves in the valve block arrangement. The cylinder-piston assembly is sealingly connected to the valve block assembly and the lines therein. The valve block assembly itself is in turn with the help of the mounting assembly on the storage bottle or the like. appropriate.

In the valve block of the valve block arrangement there is a suction valve which allows liquid to be sucked in from the storage bottle by means of a suction pipe. The intake pipe, usually in the form of an attached hose, extends deep down into the storage bottle. A discharge line extends approximately horizontally from the valve block. A discharge valve is located in the discharge line or in the valve block at the beginning of the discharge line. The ejection line sometimes has an additional switching valve, via which a return line back into the storage bottle can be opened or closed. The ejection line can have a closure at the orifice where the liquid exits.

Since the ejection line protrudes approximately horizontally from the valve block and often also carries the switching valve explained above, this is the side from which an operator works with the bottle attachment device. This side can be referred to as the "front side" of the bottle attachment device. The opposite side is the "back" of the bottle attachment device. At a Electronic design of a bottle attachment device is a display with appropriate controls preferably on the front of the bottle attachment device.

In the fastening arrangement for fastening the outer housing and/or the valve block arrangement of the bottle attachment device on a storage bottle or the like. it is often a thread arrangement similar to a union nut or an internal thread worked into the valve block itself for screwing onto the external thread on a bottle neck of the storage bottle (see the prior art mentioned at the outset). However, other fastening arrangements such as bayonet systems or short-stroke chucks can also be used in principle, as can systems based on the type of ground-bevel connection customary in the laboratory.

The issue at hand is the ejection line arrangement for a bottle attachment device of the type in question. As mentioned, this ejection line arrangement is attached to the valve block arrangement and/or to the outer housing in an exchangeable manner and protrudes forward overall. The ejection line arrangement includes a cantilever-like, usually arc-shaped holder, an ejection line that is arranged and guided in the holder and ends in an ejection tip, and a retaining tab, usually attached to the holder, with a closure cap attached to it at the end, with which the tip of the ejection line can be closed, see above that no further liquid can accidentally drip off the ejection tip.

In the state of the art on which the present invention is based ( EP 2 799 141 A2 ), the retaining tab is a narrow, elongated, easily bendable strip of material made of a suitable plastic material. This strip of material is attached to the holder of the ejection tube assembly so that when the cap is removed from the tip of the ejection tube, it hangs substantially vertically downward (with the cap attached at the bottom). The closure cap itself is captively attached to this strip of material, but can be rotated about its longitudinal axis if the closure cap has to be attached to the tip of the ejection line with a rotary movement. For this purpose, the strip of material has an eyelet, which is located with play in a circumferential annular groove in the cap. This is the most secure design of tip and closure cap that is customary today. If this is a simple plug-in connection, which is also known per se, the closure cap does not have to be rotatably mounted on the retaining tab.

The retention tab of the ejection conduit assembly is typically made of a plastic suitable for the application, preferably a chemical resistant plastic. So that the closure cap is outside of the flow area of the liquid flowing out of the tip when the tip is open, the retaining tab is attached to the holder in such a way that the retaining tab folds down automatically when the closure cap is loosened and hangs essentially vertically downwards. To close the tip, the cap is moved upwards and the retaining tab is deformed in an arc.

If the closure cap remains on the tip for a long period of time, the retaining tab, which is made of plastic, begins to deform plastically to a certain extent. The retaining tab then maintains a slightly curved shape even when the cap has been removed from the tip of the discharge tube. Contrary to what was originally intended, the closure cap at the lower end of the retaining tab then moves closer to the area in which the liquid flows out of the tip, the working area. This interferes with the handling of the bottle attachment device.

If the cap hits something in an uncontrolled manner, the liquid that is stuck to the cap and may be toxic or corrosive may be sprayed out. At least the closure cap protrudes into the work area in which the container holding the dispensed liquid is located and is yieldingly and resiliently pushed aside. The liquid can get to the outside of the container and consequently also to the grip area of the closure cap. The unintended result is that the operator's hand gets dirty and the liquid is carried over to other objects.

Due to the fact that the retaining tab is deformed more or less in an arc, bending stress also occurs in the retaining tab when the cap is in the closed position on the tip, which causes friction in the eyelet/groove connection and prevents the cap from rotating at the end of the retaining tab. The friction can be so strong that the eyelet is rotated, the strip of material twists and the ability to rotate is blocked entirely.

In the prior art, one also finds bottle attachment devices whose tip is arranged very high on the holder. The cap that is put on is higher than the arc-shaped material strip. The sheet of material strips then even hinders the manual release of the cap and the back of the hand can hit the sheet during the turning movement.

The teaching of the invention is based on the problem of improving the prior art discharge line arrangement provided with a closable tip and a bottle attachment device equipped with such a discharge line arrangement in terms of user-friendliness of handling.

The problem indicated above is solved by the features of the characterizing part of claim 1 and claim 11 in an ejection line arrangement having the features of the preamble of claim 1 and claim 11, respectively. Preferred refinements and developments are the subject matter of the dependent claims.

The problem indicated above is also solved by the features of the characterizing part of claim 12 in a bottle attachment device with the features of the preamble of claim 12 .

The invention is based on the idea of realizing the manipulation for closing the tip by moving the closure cap in a targeted manner by means of a holding tab.

According to the invention, according to a first teaching, it is provided that the retaining tab is pivoted at its end fastened to the ejection line arrangement by means of a rotary joint, which has a physically present axis of rotation.

The swivel joint in the sense of the present invention is a joint that enables a rotary movement of the two components connected by means of the swivel joint relative to one another around a physically existing axis of rotation from the basic construction through any angle, even more than 360°. Due to other design specifications, for example adjacent components, the relative rotational movement that can actually be performed by the components can be limited to an angle of less than 360°. Such an angle limitation can also be designed as an additional structural measure in the rotary joint itself. In terms of the basic construction, however, the swivel joint is one that allows the said relative rotatability of the two components connected to one another at any desired angle.

The pivot joint having the physical axis of rotation at the indicated location causes the retaining tab to follow the operator's movement of the closure cap from its hanging rest position to the tip to the closed position with virtually no resistance. Apart from the minimal influence of its own weight, the retaining lug is not subject to any bending stress, so there is no relevant plastic deformation. The closure cap together with the holding tab can be moved back and forth between its closed position on the one hand and its rest position on the other hand with practically no resistance. In the rest position, the holding tab hangs from the holder of the ejection line arrangement, following the dead weight of the holding tab together with the closure cap, essentially vertically downwards. This does not change even if the ejection line arrangement is used for a long time. The locking cap always remains outside the working area below the tip of the expulsion line.

With the arrangement of a swivel joint realized according to the invention, the holding tab can easily be designed as a straight, elongated material strip made of a relatively stiff plastic material. With this construction, the safe position of the closure cap in the rest position is ensured particularly efficiently. When the closure cap is in place, the strip of material forming the retaining tab is preferably essentially straight, that is to say not bent, and does not interfere with the manual loosening or putting on of the closure cap.

In order to achieve the most horizontal possible position of the retaining tab in the closed position of the sealing cap, which in turn least hinders the rotation of the sealing cap at the end of the retaining tab, it is advisable to arrange the swivel joint on the holder at the level of the tip of the ejection line.

Specifically, the swivel joint can be constructed from a combination of bearing journals and bearing lugs, with the bearing journal or journals preferably being arranged on the ejection line arrangement, while the bearing lug or bearing lugs are arranged on a bracket-like end of the retaining strap. However, a reverse arrangement is also conceivable. The bearing pin or pins form the physical axis of rotation of the rotary joint according to the invention.

The pivoting movement of the retaining tab with the closure cap can mean that when the closure cap hits the tip of the ejection line, the radial distance to the swivel joint is slightly different than when the closure cap is in the final closed position on the tip. In order to achieve an optimization of the construction here and to keep the closure cap on the tip free of disturbing forces even under these circumstances, it is recommended that a length compensation is provided between the swivel joint and the closure cap. The effective length of the retaining tab between the swivel joint and the closure cap can change slightly depending on the position of the retaining tab. You can do this, for example realized by a limited telescopic design of the strip of material forming the retaining tab. However, this can be implemented particularly simply and expediently on the rotary joint and/or on the closure cap.

According to the preferred teaching, it is now provided that the advantageous longitudinal displaceability of the holding bracket is realized in that the bearing eyelet is designed as a slotted eyelet. If the bearing eyelet, according to the preferred teaching, is arranged on the holding strap, the slotted eyelet should extend in the direction of the longitudinal axis of the holding strap.

The attachment of the retaining lug to the holder of the ejection line arrangement is particularly useful if the bearing lug is designed to be open on one side with an opening whose opening dimension is smaller than the diameter of the bearing pin in such a way that the bearing lug can be pushed onto the bearing pin in a latching manner using its own elasticity . The openings are dimensioned in such a way that the force to be applied for assembly and disassembly exceeds the weight of the retaining clip with the sealing cap many times over. The retaining lug with sealing cap is therefore securely suspended in the swivel joint, while the retaining lug with sealing cap can be efficiently assembled and disassembled. The design of the bearing eyelet or bearing eyelets as a slotted eyelet or slotted eyelets ensures a length tolerance of the interacting components that is expedient for practical use.

In order to be able to accommodate the bearing lug or lugs or, in the alternative design, the bearing journal or journals, it can be provided that the end of the retaining lug assigned to the swivel joint is designed in the manner of a bow or a fork. In the end, the retaining tab is no longer the straight, elongated strip of material, but has a shape that is adapted to the function in the swivel joint.

However, the design can also be chosen such that the holding tab is provided with an additional connection piece, which in turn is designed like a bow or fork and in which the at least one bearing eyelet is located or on which the at least one bearing pin is located in the alternative.

According to a further independent teaching of the invention, in particular relating to the geometry of the retaining tab, which is of particular importance in combination with the teaching of the invention described above, when the closure flap is released and hanging downwards, the retaining tab points between its end attached to the ejection line arrangement and its cap-bearing end has a spacing which corresponds to the distance between the end of the retaining pocket attached to the discharge line assembly and the longitudinal axis of the tip of the discharge line. The distance at the retaining tab is therefore the same before and in the closed position. When attaching the cap, the tip is always hit. A deformation of the retaining tab for attaching the closure cap to the tip can be omitted.

In the above-described independent teaching of the invention, the retaining tab is designed to be essentially rigid. By adapting the length to the predetermined distance, this gauge can also be implemented with a joint other than a rotary joint at the end of the retaining tab attached to the ejection line arrangement, for example with a thin film hinge that forms little resistance to bending. A length compensation can also be integrated in such a system if you still need it.

The subject matter of the invention is not only the above-described ejection line arrangement for a bottle attachment device for handling liquids, but also and in particular a bottle attachment device for handling liquids, the ejection line arrangement of which is designed according to the invention in the manner described above.

• 1 in perspektivischer Ansicht ein Flaschenaufsatzgerät zur Handhabung von Flüssigkeiten in Form eines Flaschenaufsatzdispensers,
• 2 in 1 entsprechender Darstellung ein Flaschenaufsatzgerät ohne Umschaltventil,
• 3 das Flaschenaufsatzgerät aus 1 mit Verschlusskappe und Haltelasche in Verschlussstellung,
• 4 in vergrößerter Darstellung, ausschnittweise, die Ausstoßleitungsanordnung des Flaschenaufsatzgerätes aus 1 und
• 5 in vergrößerter Darstellung, ausschnittweise, die Ausstoßleitungsanordnung des Flaschenaufsatzgerätes aus 3.

The invention will now be explained in more detail below with reference to a drawing that merely shows a preferred exemplary embodiment. In the drawing shows

• 1 a perspective view of a bottle-top device for handling liquids in the form of a bottle-top dispenser,
• 2 in 1 according to the illustration, a bottle top device without a switching valve,
• 3 the bottle attachment device 1 with locking cap and retaining tab in closed position,
• 4 in an enlarged view, in detail, the ejection line arrangement of the bottle attachment device 1 and
• 5 in an enlarged view, in detail, the ejection line arrangement of the bottle attachment device 3 .

1 shows a preferred embodiment of a bottle-top device 1 according to the invention for handling liquids, here in the form of a bottle-top dispenser.

In general, reference may be made to the general catalog of the applicant (BRAND general catalog 900 (June 2013)) for bottle attachment devices for handling liquids, so-called “liquid handling” devices. There bottle attachment devices of the type in question are explained in detail in construction and application. For the rest, for bottle attachment devices of the type in question, reference may also be made to the sources from the prior art mentioned in the introduction.

The definitions of top and bottom as well as of front and back that were given in the introduction to the description apply to the bottle attachment device that is described here in the preferred exemplary embodiment. The bottle attachment device 1 is always in the in 1 illustrated position on a storage bottle 2 explained as a preferred example of a storage container, even if it should not be shown in this position in the individual representations.

This in 1 Bottle attachment device 1 shown is attached to a storage bottle 2 during operation. More precisely, the bottle attachment device 1 is attached to the neck of the storage bottle 2 with the aid of a fastening arrangement 3 . If the bottleneck of the storage bottle 2 has an external thread, then the fastening arrangement 3 can be, for example, a type of cap with an internal thread, which is attached to the bottom of the bottle attachment device 1 . However, the fastening arrangement 3 can also be designed in the form of a plug-like plug-in arrangement or assume other forms. The only important thing is that the bottle attachment device 1 can be securely fastened to the storage bottle 2 or another suitable storage container by means of the fastening arrangement 3 .

In 1 At the top of the bottle attachment device 1 you can see its cylinder-piston arrangement 5. In the present case, the bottle attachment device 1 has a cylinder-piston arrangement 5 with an outer cylinder sleeve 5' encompassing the cylinder. There is a mechanical, adjustable stroke length stop on this.

A valve block arrangement 4 carries the cylinder-piston arrangement 5, but is itself located here, in accordance with the preferred teaching, in an outer housing 6 of the bottle attachment device 1, i.e. it is in 1 not immediately recognizable. The fastening arrangement 3 itself is located on the valve block arrangement 4 or, as here, on the outer housing 6.

From the outer housing 6 of the bottle attachment device 1, a discharge line 7 protrudes forwards, which is arranged and guided in a cantilever-like, angled holder 8 in the exemplary embodiment shown. The ejection line 7 ends in a tip 9. Attached to the holder 8 is a retaining tab 10, which holds a closure cap 11, with which the tip 9 of the ejection line 7 can be closed and protected against dripping of liquid.

A suction line 12 for liquid extends downwards from the valve block arrangement 4 hidden in the outer housing 6 into the storage bottle 2 . A return line 13 can be seen next to the suction line 12, through which liquid can be fed back into the storage bottle 2 instead of through the discharge line 7, if required.

A switching valve 14 suitable for liquid to flow back into the storage bottle 2, which can be actuated by means of a toggle 15 on the top of the holder 8, is located here outside the valve block arrangement 4 and the outer housing 6 and is part of the holder 8 in the illustrated and preferred exemplary embodiment for the discharge line 7.

There are also bottle-top devices 1 in the form of bottle-top dispensers without a switching valve 14, i.e. without the “re-dosing” function, which is explained in detail in the prior art ( EP 0 542 241 A2 ). Then, of course, the return line 13 is also omitted (see 2 ).

1 shows the bottle attachment device 1 with the switching valve 14 as part of the holder 8 and with the retaining tab 10 together with the closure cap 11 in the rest position, ie hanging down from the discharge line arrangement 7'.

3 shows the same arrangement as 1 , Now only the closure cap 11 is seated on the tip 9 of the ejection line 7 and closes it, so that the retaining tab 10 extends essentially horizontally from the switching valve 14 of the holder 8 to the closure cap 11.

4 Fig. 12 shows the ejection pipe assembly 7' 1 , but now a cover belonging to the holder 8 has been removed. Thereby, the inside of the ejection pipe assembly 7' can be seen. It can be seen that the retaining tab 10 is suspended from the switching valve 14 housing. If the holder 8 does not have a switching valve 14, the retaining tab 10 can be hung up at another point on the ejection line arrangement 7', for example on the cover (see above in 2 ).

Typically, and also envisaged here, the closure cap 11 is captively attached to the retaining tab 10, but is attached such that it can rotate about its longitudinal axis. That is in the illustrated embodiment example realized in that there is an annular eyelet on the retaining tab 10, which is rotatably guided in an annular groove of the closure cap 11 and is limited axially by the groove walls.

4 and 5 now show the core of the invention particularly well, namely that the retaining tab 10 is pivoted at its end attached to the ejection line arrangement 7 ′ by means of a rotary joint 17 . This is a rotary joint 17 that has a physical axis of rotation 18, not a joint that is based in any way on material deformation, for example similar to a film hinge. With the swivel joint 17, the holding tab 10 can pivot about the swivel axis 18 with practically no resistance. The function of such a swivel joint 17 has been explained in detail in the general part of the description. Reference may be made to these explanations here.

The axis of rotation 18 runs parallel to the front of the bottle attachment device 1 and transversely to the longitudinal axis of the closure cap 11. This results in the pivoting movement of the retaining tab 10, guided in a plane perpendicular to the front of the bottle attachment device 1 and transverse to the longitudinal axis of the closure cap 11.

Provision is preferably made for the retaining tab 10 to be designed as a substantially straight, elongated strip of material. As already stated, the retaining tab 10 is preferably made of a suitable plastic. The arrangement of the retaining tab 10 on a swivel joint 17 now gives the possibility that the retaining tab 10 can be made relatively stiff, significantly stiffer than the retaining tabs in the prior art known so far, if one so desires. It then assumes a constant, loadable position relative to the closure cap 11, which has a positive effect in particular in the closed position with the retaining tab 10 aligned essentially horizontally and in a straight line.

In order to ensure a substantially horizontal alignment of the holding tab 10 in the closed position of the closure cap 11 in practice, it is recommended that the rotary joint 17 is arranged on the ejection line arrangement 7 ′ at the level of the tip 9 of the ejection line 7 . This is also implemented in the illustrated embodiment. The retaining tab 10 is located above the grip area on the closure cap 11 and its loosening/unscrewing is not disturbed.

With regard to the configuration of the swivel joint 17, the exemplary embodiment shown and in this respect preferred shows that the swivel joint 17 has two bearing journals 18 arranged on the ejection line arrangement 7' and forming the axis of rotation 18, and one bearing eye 19 arranged on the retaining bracket 10 and encompassing the bearing journal 18 for each bearing journal 18 . This design makes it possible to pivot the holding tab 10 in a plane in the direction of the ejection line arrangement 7'. When the hanging closure cap 11 is manually attached or lifted, it is guided straight towards the tip 9 and hits it exactly.

In the present embodiment it is provided that in 4 a bearing pin 18 is arranged at the front and rear of the housing of the switching valve 14 and that each of the bearing pins 18 is assigned a bearing eyelet 19 on an end flank of a fork-like connecting piece 10 ′ of the retaining bracket 10 . The bearing journals 18, which are arranged here on the housing of the changeover valve 14 so as to project outwards, rest against the inner wall of the cover when the cover of the holder 8 is in place. This ensures that the retaining bracket 10 with its bearing eyes 19 in the connection piece 10' cannot slip off the bearing pins 18 to the side. A guide for the bearing lugs 19 of the rotary joint 17 can also be present inward, towards the housing of the changeover valve 14 .

In principle, it is conceivable that the bearing lugs 19 of the connection piece 10' are snapped onto the bearing pins 18 from the outside using the inherent elasticity of the plastic material. The illustrated and preferred exemplary embodiment shows a more expedient solution in this regard, which allows assembly and disassembly, in particular even when the cover of the holder 8 is in place. For this purpose it is provided that the bearing eyelet 19 is designed to be open on one side with an opening 20 whose clearance is smaller than the diameter of the bearing pin 18 in such a way that the bearing eyelet 19 can be pushed onto the bearing pin 18 in a latching manner using its own elasticity. You can do that in 4 and 5 recognize very well.

In 5 it becomes clear that it is expedient to provide length compensation between the swivel joint 17 and the closure cap 11, not only to compensate for the given trigonomic deviation of the pivot bearing, but also to compensate for tolerances. In the exemplary embodiment shown, this is made possible with a length compensation on the fastening section on the swivel joint 17 . In addition or as an alternative, it would also be conceivable to design the fastening section on the closure cap 11 with a length compensation. Here, too, other design options for the length compensation have been pointed out in the general part of the description, for example to a telescopic design of the retaining tab 10.

In 4 and 5 can also be seen that the bearing lug 19, in the illustrated embodiment, so the two oppositely located bearing lugs 19 is formed as a slotted eyelet. The elongated hole design of the bearing lug 19 results in a path of movement of the bearing lug 19 relative to the bearing pin 18 in the direction of the longitudinal axis of the elongated hole lug. In practice, this is a length compensation. This allows a particularly comfortable, quick, resistance-free attachment and removal of the closure cap 1 at the tip 9 (see Fig 5 in comparison with 4 ).

The embodiment described above is not to be understood as limiting. Alternatives have already been discussed in various respects. Thus, the bearing pins 18 can also be arranged on the retaining bracket 10, whereas the bearing lugs 19 would then be arranged on the holder 8. The connecting piece 10 ′, which is designed here like a fork and is attached to the retaining tab 10 , could also be part of the retaining tab 10 . Then the end of the retaining tab 10 would simply be designed like a bow or fork and would have the bearing eyelet 19 or bearing eyelets 19 or, in the alternative design, the bearing pin 18 or the bearing pins 18.

Contrary to the retaining lugs of the prior art, which compensate for the distance from their suspension to the tip with their flexibility, this is largely given geometrically in the case of the retaining lug 10 according to the invention. In the embodiment according to the invention, the retaining tab 10 has the swivel joint 17 at its end fastened to the ejection line arrangement 7 ′ and the annular eyelet at its end carrying the closure cap 11 . The distance at the retaining tab 10 between the closure cap 11 and the fixed end corresponds to the distance from that end to the longitudinal axis of the tip 9 on the ejection conduit 7. The distance at the retaining tab 10 is thus in the closed position and in the position with detached and after below hanging cap 11 same. The distance is preferably horizontal, as in 5 pictured, measured. When attaching the closure cap 11, the retaining tab 10 does not have to be pulled or bent in order to hit the tip 9.

The retaining tab 10 can be designed in terms of material and cross section in such a way that it is essentially rigid. It can also have additional stiffening elements, e.g. beads.

An embodiment not according to the invention, in which the distance on the retaining tab 10 between the closure cap 11 and the attached end of the retaining tab 10 corresponds to the distance from this end to the longitudinal axis of the tip 9 on the ejection line 7, can also be implemented without a swivel joint 17. For example you can use instead of the swivel joint 17 then a film hinge that can be easily bent. With this construction, too, a considerable advantage is already achieved compared to the retaining tabs 10 used in the prior art.

From the overall presentation in the above statements, it follows that the teaching of the invention not only relates to an ejection line arrangement 7 'for a bottle attachment device 1 as a replacement part, but that the teaching of the invention also relates in particular to a bottle attachment device 1 in which an ejection line arrangement 7' is used according to the invention. In this respect, reference may be made to the above statements.

Reference List

1

bottle attachment device

2

storage bottle

3

mounting arrangement

4

valve block assembly

5

Cylinder-piston arrangement

6

outer casing

7

exhaust line

7'

expulsion line arrangement

8th

holder

9

Top

10

retaining tab

10'

fitting

11

sealing cap

12

intake line

13

return line

14

switching valve

15

gag

17

swivel joint

18

Axis of rotation/pivot

19

bearing eyelet

20

opening

Claims (12)

Ejection line arrangement for a bottle attachment device (1) for handling of liquids, the bottle attachment device (1) having a cylinder-piston arrangement (5) for sucking in and expelling a liquid, a valve block arrangement (4), a fastening arrangement (3) for fastening the valve block arrangement (4) on a storage bottle (2) or the like .like and a discharge line arrangement (7'), the discharge line arrangement (7') being attached to the valve block arrangement (4) and/or to an outer housing (6) accommodating the valve block arrangement (4) and from the valve block arrangement (4) and/or a the outer housing (6) accommodating the valve block arrangement (4) protrudes forward, with a cantilever-like holder (8), an ejection line (7) arranged and guided in the holder (8) and ending in a tip (9), and one on the Ejection line arrangement (7') fastened retaining tab (10) with a closure cap (11) attached thereto at the end, with which the tip (9) of the ejection line (7) can be closed, characterized in that the retaining tab (10) at its end on the ejection line arrangement ( 7') fixed end by means of a swivel joint (17) which has a physically present axis of rotation (18). Ejection line arrangement according to claim 1 , characterized in that the retaining tab (10) is designed as a substantially straight, elongate strip of material and when the closure cap (11) is fitted, the strip of material forming the retaining tab (10) is arranged substantially straight. Ejection line arrangement according to claim 1 or 2 , characterized in that the swivel joint (17) is arranged on the holder (8) at the level of the tip (9) of the discharge line (7). Ejection line arrangement according to one of Claims 1 until 3 , characterized in that the swivel joint (17) has at least one, preferably two, arranged on the ejection line arrangement (7') and forms the axis of rotation (18) bearing journal (18) and each bearing journal (18) has at least one arranged on the holding tab (10). , has a bearing eyelet (19) surrounding the bearing journal (18) or that the rotary joint (17) has at least one, preferably two, bearing journals (18) arranged on the holding bracket (10) and forming the axis of rotation (18), and each bearing journal (18) has at least a bearing lug (19) which is arranged on the ejection line arrangement (7') and encompasses the bearing pin (18). Ejection line arrangement according to claim 4 , characterized in that between the swivel joint (17) and the closure cap (11) a length compensation is provided, which is preferably formed on the swivel joint (17) and / or on the closure cap (11). Ejection line arrangement according to claim 5 , characterized in that the bearing eyelet (19) or the bearing eyelets (19) is or are designed as a slotted eyelet. Ejection line arrangement according to one of Claims 4 until 6 , characterized in that the bearing eyelet (19) is designed to be open on one side with an opening (20) whose opening dimension is smaller than the diameter of the bearing journal (18) in such a way that the bearing eyelet (19) can be fitted onto the bearing journal (18 ) can be snapped on. Ejection line arrangement according to one of Claims 4 until 7 , characterized in that the end of the retaining lug (10) assigned to the swivel joint (17) is constructed in the manner of a bow or fork or is provided with a bow-like or fork-like connection piece (10') in which the at least one bearing eye (19) or at least one bearing pin is located (18) is located. Ejection line arrangement according to one of Claims 1 until 8th , characterized in that the closure cap (11) on the retaining tab (10) captive, but rotatable about its longitudinal axis is attached. Ejection line arrangement according to one of Claims 1 until 9 , characterized in that the retaining tab (10) when the closure cap (11) is released from the holder (8) hangs essentially vertically downwards. Ejection line arrangement for a bottle attachment device (1) for handling liquids, the bottle attachment device (1) having a cylinder-piston arrangement (5) for sucking in and ejecting a liquid, a valve block arrangement (4), a fastening arrangement (3) for fastening and/or or the valve block assembly (4) on a storage bottle (2) or the like. and a discharge line arrangement (7'), the discharge line arrangement (7') being attached to the valve block arrangement (4) and/or to an outer housing (6) accommodating the valve block arrangement (4) and from the valve block arrangement (4) and/or a the outer housing (6) accommodating the valve block arrangement (4) protrudes forward, with a cantilever-like holder (8), an ejection line (7) arranged and guided in the holder (8) and ending in a tip (9), and one on the Ejection line assembly (7') attached to Hal telasche (10) with a closing cap (11) attached to it at the end, with which the tip (9) of the ejection line (7) can be closed, in particular according to one of Claims 1 until 10 , characterized in that , when the closure cap (11) is loosened and hanging downwards, the retaining tab (10) has a distance between its end attached to the ejection line arrangement (7 ') and its end carrying the closure cap (11) which is the distance between the the end of the retaining tab (10) fastened to the ejection line arrangement (7') and corresponds to the longitudinal axis of the tip (9) of the ejection line (7). Bottle attachment device for handling liquids with a cylinder-piston arrangement (5) for sucking in and expelling a liquid, a valve block arrangement (4), a fastening arrangement (3) for fastening the valve block arrangement (4) on a storage bottle (2) or the like. and a discharge line arrangement (7'), wherein the discharge line arrangement (7') is attached to the valve block arrangement (4) and/or to an outer housing (6) accommodating the valve block arrangement (4) and from the valve block arrangement (4) and/or a die Valve block arrangement (4) receiving the outer housing (6) protrudes forward, characterized in that the discharge line arrangement (7 ') according to one or more of Claims 1 until 11 is trained.

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