EP3426574B1 - Manual dosing gun - Google Patents

Description

The invention relates to a hand-dispensing gun for mixing individual components and dispensing the resulting multicomponent mass. The hand dispensing gun has a handle portion for holding the hand dispensing gun and a delivery assembly having for each individual component one of these associated channel with an inlet opening and an outlet opening, each outlet opening with a needle valve comprising a valve seat and a plug stem is provided lockable and releasable. The hand-dispensing gun also has a mixing chamber unit which is detachably arranged on the feed arrangement and has a mixing chamber for mixing individual components flowing out of the outlet openings and a nozzle for exiting the multicomponent mass adjoining the mixing chamber. The hand dispensing gun also includes an operating element by which the plug rods are movable out of their valve seats.

Such Handdosierpistole is eg from the WO 87/01680 known.

From the DE 20 2014 006 023 U1 is also a Handdosierpistole with a valve assembly having at least a first and a further adjacent in a housing arranged shut-off valve whose Absperrkörper are simultaneously brought by a single operating lever from a closed position to an open position. The shut-off are doing as a shaft with holes or as with each other firmly connected balls formed with holes. The training as needle valves is not described.

The invention has for its object to provide a hand dispensing gun of the type mentioned with improved properties.

The invention is solved by a hand dispensing gun according to claim 1. A change in position of the operating element from a rest position to a release position is thus either transmitted differently to the individual plug bars or exactly the same for each plug stem. To what extent the transmission of the change in position of the operating element takes place on each of the plug rods is individually adjustable. Thus, for example, a change in position of the operating element of its rest position in its maximum deflected release position one of the plug rods completely shift from its valve seat and open the needle valve maximum while leaving another cone rod still half in the valve seat. The volume flow through the differently wide open needle valves can be adjusted individually. If, in the case of two individual components, both individual components are equally viscous and, moreover, are introduced into the supply arrangement with the same pressure, the mixing ratio of the individual components can be regulated by means of the differently wide-open needle valves. Conversely, with different viscous individual components or with different pressure in the feed arrangement introduced individual components Balancing takes place via differently wide open needle valves in such a way that in the mixing chamber the individual components are mixed in the same proportion. By means of the hand-dispensing gun according to the invention, it is thereby possible to mix individual components with one another which previously could not be mixed with one another to give multicomponent masses with the aid of hand-dispensing guns. The operating element is preferably designed as an operating lever.

In a preferred embodiment of the invention, each of the plug rods on one end adapted to the shape of the associated valve seat cone and the change in position of the cone relative to the valve seat is upon actuation of the control element, so its change in position from a rest position with closed valves in a release position with at least a partially open valve, individually adjustable for each plug stem and associated cone via an adjustment of the transmission element. The adjustment arrangement provides an adjustment, to what extent a change in position of the operating element affects the individual taper rods and on the cones associated with the cones.

Advantageously, the hand-dispensing pistol has a movement limiter delimiting the range of movement of the operating element. Particularly preferably, the degree of movement limitation of the movement limiter is configured adjustable, in particular as a set screw. By providing the movement limiter, a maximum possible release position is defined. The operating element can be moved from a rest position, in which the valves are closed, into a movement limiter limited release position are shifted with fully or partially opened needle valves. The movement limiter defines the maximum opening of the individual needle valves present at the maximum deflected operating element.

In a preferred embodiment of the invention, the opening area of at least one of the needle valves through which a single component enters the mixing chamber, at a change in position of the control element from its rest position in its limited by the movement limiter trigger position, from 0% in the rest position to 100% in the Triggering position opening formed. By the adjustment arrangement while a limitation of the opening area is adjustable to a range between 10% and 100%. The opening area is formed by an annular gap between the valve seat and the cone of the plug stem. The further the cone moves away from the valve seat, the larger the annular gap and thus the opening area of the needle valve become. With the aid of the adjustment arrangement, it is now possible to set a limitation of the opening area to a range between 10% and 100% relative to the maximum possible opening area with the needle valve fully open for at least one of the needle valves. Particularly preferably, the adjustment arrangement is designed to be infinitely fixable to the maximum possible opening area of at least one of the needle valves.

According to the invention, the transmission element is designed as a driver arrangement. According to the invention, the transmission element has a first driver connected to a pin bolt and on each plug stem is a first stopper member arranged, wherein the first stop elements are contactable in the sense of by pressing the operating element by the first driver. The positioning of the first driver and / or at least one of the first stop elements in the direction of the longitudinal extent of the associated plug stem is designed to be adjustable. If, therefore, the first stop elements of two adjacent plug bars are arranged at the same height in the direction of the longitudinal extent of these plug bars, then the first driver takes on actuation of the control element both stop elements and thus the respectively associated two plug bars at the same time and to the same extent. If, on the other hand, the first stop element of a first plug stem is positioned differently relative to the first stop element of another plug stem in the direction of the longitudinal extension, then the first driver initially carries the one first stop element and only then the further first stop element. Accordingly, at first only one plug stem is moved out of its valve seat and only with a time delay the further plug stem. This makes it possible that one of the needle valves is fully open and the other needle valve, for example, only half. This allows the volumetric flows of the two individual components to be regulated in a targeted manner.

In a particularly preferred embodiment of the invention, the adjustment arrangement in this case has a scale for positioning the first driver and / or at least one of the first stop elements. With the aid of scaling, it is easier for an operator to define the desired volume flows of the individual components. For example, the manufacturer of the individual components indicate on the outer packaging that a component A relative to the component B in the ratio 1: 2 should be mixed and according to the scale of the adjustment also an opening ratio of the needle valves of 1: 2 should provide. The scaling is linear to the opening area of the respective needle valves.

Advantageously, at least one of the first stop elements is configured as a thumbscrew running on the associated plug stem. The combination of running on the plug stem thumbscrew and the first driver forms the adjustment of the transmission element. With the help of the thumbscrew a simply designed, but very reliable functioning change in position of the first stop member in the direction of the longitudinal extension of the associated plug stem is possible.

In a particularly preferred embodiment of the invention, the hand-dispensing gun has a return element acting on the plug bars with a force in the direction of its respective valve seat. Particularly preferably, the restoring element is designed as a return spring.

According to the invention, a further, immovable driver and on each plug stem another, immovable stop member are arranged on the pin bolt, which can be contacted by the further driver and via which a force from the restoring element on the plug bars in the direction of its valve seat is transferable. When transferring the control element from the release position in its rest position of the other driver exercises on the other stop elements of the plug bars a restoring force by which the plug rods are acted upon by the restoring element force pressed into the respectively associated valve seats. By providing the return element, the plug rods are thereby pressed into the valve seats as soon as the operating element is released by an operator. There is a kraftbeaufschlagte provision in the rest position.

In a preferred embodiment of the invention, the stop elements are secured against a change in position by an adjustment. The adjustment is preferably formed by springs, the one-sided force the first stop elements in the longitudinal extent of the plug bars in the direction of the cone. The adjustment ensures that the positioning of the first stop elements remain unchanged even with a vibration of Handdosierpistole.

Advantageously, the mixing chamber unit can be fixed via a securing element in an operating position on the feed arrangement. To determine serve preferably locking projections on the mixing chamber unit are engaged behind by the fuse element. Particularly preferably, the securing element also has an ejection device which removes the mixing chamber unit from its operating position determined at the feed arrangement. The ejection device is advantageously designed as a lever which pushes out the mixing chamber unit from its positioning on the feed arrangement as soon as the ejection device is operated. By moving the securing element in a first direction, the mixing chamber unit is preferably fixed to the feed arrangement. By moving the fuse element in the opposite direction, the ejector of the fuse element is then activated, actively removing the mixing chamber unit from the feed assembly.

Advantageously, the securing element is subjected to force in the direction of the mixing chamber unit. The application of force ensures that the securing element still secures the mixing chamber unit in its operating position determined at the feed arrangement even if the securing element has been removed from its securing position due to mechanical influences. By the application of force in the direction of the mixing chamber unit, the securing element is moved back into its securing position in such a case.

In a preferred embodiment of the invention, the mixing chamber unit and the feed arrangement have at least one groove and spring for the rotation-proof arrangement the mixing chamber unit on the feed arrangement. A defined positioning of the mixing chamber unit on the feed arrangement is possible beyond this.

In a particularly preferred embodiment of the invention, receiving devices for receiving aerosol cans filled with the individual components are arranged directly on the hand-dispensing gun. Particularly preferably, the receiving means thread for screwing aerosol cans with a corresponding mating thread, wherein a first receiving means an internal thread or a left-hand thread and a further receiving means have an external thread or a right-hand thread. The arrangement of the recording devices directly on the hand dispensing a very compact design of Handdosierpistole with associated aerosol cans is possible. By providing the aforementioned thread arrangement, it can be ensured that each aerosol can is inserted into the receptacle provided for it. An insertion of an aerosol can into the wrong receiving device is made impossible. In this way it can be prevented that the mixing ratios indicated on the aerosol cans are set incorrectly by an operator on the hand-dispensing gun with the aid of the setting arrangement. In addition, it can be prevented that the aerosol can of a first individual component is first used in a receiving device and then the aerosol can of a further individual component which reacts with the first individual component. Otherwise, this could result in the hand dispensing gun being destroyed due to individual components reacting with each other.

For optimum operation of the hand dispensing pistol, the aerosol cans accommodated in the receiving devices are advantageously fixable upside down, with a valve opening downwards, in the horizontal working position of the hand dispensing gun. Thus, in the horizontal working position of the hand-dispensing gun, individual components containing the aerosol cans are always located in the area of the outlet valve of the aerosol can. Particularly preferably, the receiving devices are arranged mirror-symmetrically to a longitudinal center axis of the hand-dispensing gun. This arrangement makes it easier to work with the hand dispensing gun, since this design is on the one hand very compact and on the other hand, the hand dispensing gun is balanced with inserted aerosol cans.

The invention further relates to a device for dispensing multicomponent compositions comprising a hand-dispensing gun with one or more of the aforementioned features and at least one first and one of the aforementioned aerosol cans.

Fig. 1

eine erfindungsgemäße Handdosierpistole, jedoch ohne Mischkammereinheit in einer Darstellung schräg von unten,

Fig. 2

den Gegenstand aus Fig. 1 in einer Darstellung schräg von vorne,

Fig. 3

eine erfindungsgemäße Handdosierpistole in stark vereinfachter geschnittener Darstellung den Mechanismus der Zuführanordnung zeigend,

Fig. 4

eine erfindungsgemäße Handdosierpistole in stark vereinfachter Schnittdarstellung in einer Aufsicht mit geschlossenen Nadelventilen,

Fig. 5

den Gegenstand aus Fig. 4 mit vollständig geöffneten Nadelventilen,

Fig. 6

den Gegenstand aus Fig. 4 mit teilweise geöffneten Nadelventilen,

Fig. 7

den Gegenstand aus Fig. 4, jedoch mit anders eingestellter Einstellanordnung,

Fig. 8

den Gegenstand aus Fig. 7 mit einem ersten noch geschlossenen Nadelventil und einem weiteren bereits teilweise geöffneten Nadelventil und

Fig. 9

den Gegenstand aus Fig. 7 mit einem ersten teilweise geöffneten Nadelventil und einem weiteren vollständigen geöffneten Nadelventil.

Further advantages and details of the invention are the dependent claims 2 to 14 and described below, schematically illustrated embodiment removed; show it:

Fig. 1

a manual metering gun according to the invention, but without mixing chamber unit in a representation obliquely from below,

Fig. 2

the object out Fig. 1 in a representation obliquely from the front,

Fig. 3

a Handdosierpistole invention in a highly simplified sectional view showing the mechanism of the feed arrangement,

Fig. 4

a Handdosierpistole invention in a greatly simplified sectional view in a plan view with closed needle valves,

Fig. 5

the object out Fig. 4 with fully opened needle valves,

Fig. 6

the object out Fig. 4 with partially opened needle valves,

Fig. 7

the object out Fig. 4 , but with differently adjusted setting arrangement,

Fig. 8

the object out Fig. 7 with a first still closed needle valve and another already partially opened needle valve and

Fig. 9

the object out Fig. 7 with a first partially opened needle valve and another full open needle valve.

Hereinafter, equivalent elements will be given a single reference number, if appropriate. The features described below with reference to the embodiment can also be in other combinations as illustrated subject of the invention.

Fig. 1 and Fig. 2 show a Handdosierpistole 2 according to the invention for mixing individual components and discharging the resulting multicomponent mass with a handle part 4 for holding the hand-dose gun. 2

The inside of Handdosierpistole 2 is in the Fig. 3 to 9 shown schematically simplified. The hand dispensing gun 2 has a feeding assembly 6, which is for each individual component one of these associated channel 8, 10, each having an inlet opening 12, 14 and an outlet opening 16, 18 has. In this case, each outlet opening 16, 18 with a needle valve 20, 22 comprising a valve seat 24, 26 and a plug stem 28, 30 provided closable and releasable. At the feed assembly 6, a removable mixing chamber unit 32 is arranged. The mixing chamber unit 32 is in the Fig. 1 to 3 not shown, but only in the Fig. 4 to 9 , The mixing chamber unit has a mixing chamber 34 for mixing individual components flowing out of the outlet openings 16, 18 and a nozzle 36 adjoining the mixing chamber 34 for exiting the multicomponent mass. The Handdosierpistole 2 has an operating element 38 through which the plug rods 28, 30 from their valve seats 24, 26 are movable. The control element 38 is formed in the embodiment as an operating lever.

The hand-dispensing gun 2 has at least one transmission element 40, which transmits a movement of the operating element 38 to each of the conical rods 28, 30 in an individually adjustable manner.

Each plug stem 28, 30 has at one end a cone 42, 44 adapted to the shape of the associated valve seat 24, 26. The change in position of the cones 42, 44 relative to the valve seat 24, 26 upon actuation of the control element 38 is individually adjustable for each plug stem 28, 30 and associated cone 42, 44 via an adjustment assembly 46 of the transmission element 40.

The hand-dispensing gun 2 has a movement limiter 48 delimiting the range of movement of the operating element 38, which is formed by an adjusting screw in the exemplary embodiment.

The opening area 50, 52 of at least one of the needle valves 20, 22, through which a single component enters the mixing chamber 34, is at a change in position of the control element 38 from its rest position in its limited by the movement limiter trigger position, from 0% in the rest position to 100% formed in the release position opening. Due to the adjustment arrangement 46, a limitation of the maximum possible opening area 50, 52 in the release position can be set to a range between 30% and 100%.

The transmission element 40 is formed in the embodiment as a driver assembly. The transmission element 40 has a first driver 56 connected to a pin bolt 54. At each plug stem 28, 30, a first stop element 58, 60 is arranged. The positioning of the first driver 56 and / or at least one of the first stop elements 58, 60 in the direction of the longitudinal extent 62 of the associated plug stem 28, 30, adjustable and the first stop elements 58, 60 are contacted by the first driver 56 upon actuation of the control element 38. The entrainment of the first stop elements 58, 60 is clearly in the FIGS. 4 to 6 and 7 to 9 illustrated. The first stop elements 58, 60 are configured in the embodiments as running on the associated plug stem 28, 30 thumbscrews. In Fig. 4 are both first stop elements 58, 60 in the longitudinal extent 62 of the plug bars 28, 30th arranged at the same height. In a change in position of the control element 38, in the Fig. 4 to 9 not shown, from the rest position accordingly Fig. 4 , in a release position, accordingly Fig. 5 , the first driver 56 at the same time with both first stop members 58, 60 in the longitudinal direction and in the direction of the valve seats 24, 26 away with. The extent of entrainment can be limited by the movement limiter 48 as shown in FIG Fig. 6 in relation to Fig. 5 the case is.

In the Fig. 7 to 9 For example, in the longitudinal extension 62, the adjustment arrangement 46 provides first stop elements 58, 60 arranged at different heights, as in FIG Fig. 7 easy to recognize. In Fig. 7 is the control, not shown, in the rest position. The needle valves 20, 22 are each closed. As a result of the change in position of the operating element 38, the first driver 56 takes along one of the first stop elements 60 in the longitudinal extension 62 in the direction away from the valve seat 26. This changes the positioning of the associated plug stem 30 and the cone 44 of the plug stem 30 is removed from the associated valve seat 26, as in Fig. 8 shown. The further first stop element 58 is not yet contacted by the first driver 56. The further needle valve 20 is thus still closed. By a further change in position of the operating element 38 in the triggering position, the first driver 56 also contacts the further first stop elements 58, so that the further plug stem 28 connected to the further first stop element 58 and the cone 42 arranged thereon are moved out of the associated valve seat 24. In the in Fig. 9 is shown triggering position However, it can be seen that the opening area 52 of the first needle valve 22 is open to the maximum, while the opening area 50 of the further needle valve 20 is significantly lower. The first stop elements 58, 60 are secured by Verstellsicherungen 63, 65 in the form of springs against an unwanted change in position.

The hand-dispensing gun 2 has a return element 64 acting on the plug rods 28, 30 with a force in the direction of its valve seat 24, 26, which is formed by a restoring spring in the exemplary embodiment.

On the pin bolt 54 is a further, non-adjustable driver 66 and on each plug stem 28, 30 another, immovable stop member 68, 70 are arranged, which are contacted by the further driver 66. The force of the return element 64 is transmitted from the further driver 66 to the further stop elements 68, 70 and above on the plug bars 28, 30, so that the plug rods 28, 30 are pressed in the direction of its valve seat 24, 26. In the rest position, the plug rods 28, 30 are pressed with their associated cones 42, 44 via the return element in the respective valve seat 24, 26, in particular from the Fig. 3 . 4 and 7 is recognizable.

The mixing chamber unit 32 can be fixed to the feeding arrangement 6 via a securing element 72 in an operating position. The fuse element is in Fig. 1 and Fig. 2 shown. The securing element 72 has an ejecting device 74 which removes the mixing chamber unit 32 from its operating position which is fixed to the feed arrangement 6. The fuse element 42 is in the embodiment designed as a lever. The securing element 72 is designed to be force-loaded by a spring 76 in the direction of the mixing chamber unit. The feed arrangement 6 has at least one groove 78 for the rotationally secure arrangement of the mixing chamber unit 32 on the feed arrangement 6, as in FIG Fig. 2 shown. The mixing chamber unit 32 has a groove 78 complementary to the formed spring, which is not shown in the embodiment.

references

2

Handdosierpistole

4

handle part

6

feeder

8, 10

channel

12, 14

inlet opening

16, 18

outlet opening

20, 22

needle valve

24, 26

valve seat

28, 30

plug stem

32

Mixing chamber unit

34

mixing chamber

36

jet

38

operating element

40

transmission element

42.44

cone

46

Setting arrangement

48

movement limiter

50, 52

opening area

54

bolts

56

first driver

58, 60

first stop elements

62

Longitudinal extension of the plug stem

63, 65

Verstellsicherungen the first stop elements

64

Return element (return spring)

66

another driver

68, 70

further stop elements

72

ejector

76

groove

Claims (13)

1. Manual dispense gun (2) for mixing individual components and applying the resulting multicomponent compound, having a handle part (4) for holding the manual dispense gun, having a feed-in arrangement (6) which has, for each individual component, a channel (8, 10) associated therewith that has an inlet opening (12, 14) and an outlet opening (16, 18), each outlet opening (16, 18) being provided with a needle valve (20, 22) comprising a valve seat (24, 26) and a plug stem (28, 30) such that said opening can be closed and opened, having a mixing chamber unit (32) which is detachably arranged on the feed-in arrangement (6) and has a mixing chamber (34) for mixing individual components flowing out of the outlet openings (16, 18) and a nozzle (36) attached to the mixing chamber (34) for the outlet of the multicomponent compound, and having an operating element (38) by means of which the plug stems (28, 30) can be moved out of their valve seats (24, 26), the manual dispense gun (2) additionally having at least one transmission element (40) which individually adjustably transmits a movement of the operating element (38) to each of the plug stems (28, 30), characterised in that the transmission element (40) has a first driver (56) connected to a pin bolt (54), a first stop element (58, 60) being arranged on each plug stem (28, 30), the positioning of the first driver (36) and/or of at least one of the first stop elements (58, 60) being displaceable in the direction of longitudinal extension (62) of the associated plug stem (28, 30) and the first stop elements (58, 60) being contactable by the first driver (56) when the operating element (38) is actuated, a further, non-displaceable driver (66) being arranged on the pin bolt (54) and a further, non-displaceable stop element (68, 70) being arranged on each plug stem (28, 30), it being possible for the non-displaceable stop elements (68, 70) to be contacted by means of the further driver (66), and it being possible to transmit the force of a return element (64) to the plug stems (28, 30) in the direction of the valve seat (24, 26) thereof by means of the non-displaceable stop elements (68, 70).
2. Manual dispense gun (2) according to claim 1, characterised in that each plug stem (28, 30) has a plug (42, 44) at one end, adapted to the shape of the associated valve seat (24, 26), and the positional change of the plug (42, 44) relative to its valve seat (24, 26), when the operating element (38) is actuated, is individually adjustable for each plug stem (28, 30) and its associated plug (42, 44) by means of an adjusting arrangement (46) of the transmission element (40).
3. Manual dispense gun (2) according to any of the preceding claims, characterised in that the manual dispense gun (2) has a movement limiter (48) which limits the movement range of the operating element (38).
4. Manual dispense gun (2) according to claim 3, characterised in that the opening surface (50, 52) of at least one of the needle valves (20, 22) through which an individual component passes into the mixing chamber (34), when the operating element (38) changes position from its rest position into its release position limited by means of the movement limiter (48), is designed to open from 0% in the rest position to 100% in the release position and a limit is adjustable to a range between 10% and 100% by means of the adjusting arrangement (46).
5. Manual dispense gun (2) according to any of the preceding claims, characterised in that the transmission element (40) is designed as a driver arrangement.
6. Manual dispense gun (2) according to claim 2, characterised in that the adjusting arrangement (46) has a scale for positioning the first driver (56) and/or at least one of the first stop elements (58, 60).
7. Manual dispense gun (2) according to any of the preceding claims, characterised in that at least one of the first stop elements (58, 60) is designed as a knurled screw leading to the associated plug stem (28, 30).
8. Manual dispense gun (2) according to any of the preceding claims, characterised in that the return element (64) applies a force to the plug stems (28, 30) in the direction of the valve seat (24, 26) thereof.
9. Manual dispense gun (2) according to any of the preceding claims, characterised in that the mixing chamber unit (32) can be fixed on the feed-in arrangement (6) in an operating position by means of a securing element (72).
10. Manual dispense gun (2) according to claim 9, characterised in that the securing element (72) comprises an ejector device (74) which removes the mixing chamber unit (32) from its operating position in which it is fixed on the feed-in arrangement (6).
11. Manual dispense gun (2) according to either claim 9 or claim 10, characterised in that the securing element (72) is designed to have a force applied in the direction of the mixing chamber unit (32).
12. Manual dispense gun (2) according to any of the preceding claims, characterised in that the mixing chamber unit (32) and the feed-in arrangement (6) have at least one groove (78) and a complementary-shaped tongue for arranging the mixing chamber unit (32) on the feed-in arrangement (6) so as to be secured against rotation.
13. Device for applying multicomponent compounds, comprising a manual dispense gun (2) according to any of the preceding claims and at least one first and one further aerosol dispenser.

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