DE102012004575A1 - Spray gun and accessories - Google Patents

Abstract

The invention relates to a spray gun with accessories, which is intended for spraying paints, varnishes, adhesives or other flowable materials, with a body (1) having an inlet (100) and an outlet (7) for the material, and with a reservoir (30) for the material, which can be connected to the inlet (100), which is characterized in that in the region of the inlet (100) an air supply into the reservoir (30) is provided.

Description

Spray guns for paints, varnishes, adhesives or other flowable materials have long been used. The reservoir for the material to be sprayed are usually under pressure during operation. On reservoirs for the material to be sprayed, among other things, so-called gravity cup, which operate on the principle of gravity, and hanging cup, which operate on the principle of suction, known. In recent years, so-called "upside-down cups", which are designed for one-time use, have become very popular in gravity-fed flow cups in practice. Such a cup is for example from the European patent EP 1 718 415 B1 known. It consists of a container made of plastic and a lid can be placed on it to close the cup. At the top of the cover connecting means for mounting and securing the cup on a spray gun or on the spray gun attached or attachable adapter are provided. In order to allow a smooth flow of the ink, a pressure equalization between the interior of the cup and the environment is required. For this purpose, a preferably resealable ventilation opening or a corresponding valve can preferably be provided in the cup bottom.

In so-called suspension cup guns so far pressure cup made of relatively high-quality metallic materials are used as a reservoir. These reservoirs are usually cylindrical and provided with a screw cap, which is connected to a downwardly projecting connecting piece of the spray gun via a screw connection. The connecting piece acts as an inlet for the material to be sprayed, which is then passed through the spray gun body to an outlet, a resealable vent or a corresponding valve may be present in the lid. In addition. a locking clip can be stretched over the lid. Such storage containers are not intended for single use. It would be desirable, however, from the European patent EP 1 718 415 B1 known cup or other disposable cup for hanging guns use. Namely, the valve provided in the bottom of the cup is not suitable for supplying the required air to the material to be sprayed; In the case of suspended beakers, the material would run downwards out of the beaker with the valve open.

The object of the invention is to provide a spray gun, in particular a Hängebecherpistole with a reservoir or a reservoir itself and accessories with the simplest possible design, but a reliable operation of the spray gun must be guaranteed.

This object is achieved by a spray gun with the features listed in claim 1. Characterized in that an air supply is provided in the reservoir in the region of the inlet, the reservoir can be used easily even with hanging guns.

The task relating to the reservoir is achieved with the features listed in claim 14.

As an accessory, a dowel is proposed as an air supply element according to claim 25.

Further advantageous details and embodiments of the invention are apparent from the subclaims and the embodiments described below with reference to drawings.

In the drawings shows:

1 A section through a spray gun with hanging cup,

2 a section from 1 .

3 a detail 1 .

4 to 9 another detail in different views,

10 a first schematic diagram,

11 and 12 a second schematic sketch in section and in top view,

13 to 14 a third schematic sketch in section and in top view,

15 an accessory to the third schematic diagram
and

16 a fourth schematic sketch in section.

The spray gun after 1 and 2 and is an air-powered paint spray gun and has a gun body 1 with a grip area 2 and a head 3 , These two subareas 2 and 3 run as usual at an angle of about 100 degrees to each other. The grip area 2 has at its lower end a compressed air connection 20 on. Through the handle area 2 and through the head 3 extend from the compressed air connection 20 from several air channels 21 at the front end 8th Of the head 3 the spray gun ends. The amount and pressure of these air channels 21 air flowing through can be in usual Way by means of an air micrometer 22 be regulated. The front end 8th Of the head 3 is with an air nozzle 23 be equipped, the protruding horns 24 with openings 25 having. An air nozzle ring 26 holds the air nozzle 23 on the head 3 of the gun body 1 ,

The material to be sprayed is through the front end 8th Of the head 3 led the spray gun, in the middle of a passage opening 9 for a color needle 10 is provided. The front end 8th Of the head 3 is closed by a mechanism when not operating the spray gun. The mechanism is by means of a trigger guard 11 operable; The amount of material can be regulated by means of a regulating screw 12 having.

The mechanism for the trigger guard 11 and the color needle 10 are about springs 13 . 14 non-positively actuated.

The components described so far consist in the present embodiment, for quality reasons of high-quality metals.

At the bottom of the front end 8th Of the head 3 the spray gun is the inlet area 100 for the material to be sprayed. In the present embodiment, here is a downwardly projecting, hollow connection piece 15 for a storage container 30 integrally formed for the material to be sprayed. The connecting piece 15 is provided in the present embodiment inside with a screw thread, in which a known per se separate connector 16 is screwed from a sealing plastic material. On such a connector 16 Under certain circumstances, for example, when the spray gun is made of more or less elastic plastic material, be waived. At the connector 16 is a suction hose 17 releasably secured as a conveying element for the material to be sprayed. He could also be unsolvable with the connector 16 , the connecting piece 15 or another component.

The suction hose 17 is made in the present embodiment of a transparent, flexible plastic. On the other hand, but a more or less rigid, transparent, translucent or opaque intake pipe made of plastic, metal or other material could be used. At its lower, free end is the intake hose 17 with a sieve 18 fitted. The sieve 18 is here bag-shaped and consists of regions reinforced by ribs plastic material. At its free end is a perforated plate 19 provided, in which the suction hose 17 fittingly intervenes. An insoluble, possibly one-piece connection between the sieve 18 and the intake hose 17 or the like may also be provided. The suction hose 17 dives far into the material, not shown, to be sprayed in the reservoir 30 one.

Of course, could also be a different shaped sieve on or in the suction hose 17 be provided. If desired, a sieve may also be present elsewhere in the flow of material or not at all.

The in the 1 and 3 shown reservoir 30 has a frustoconical paint cup 31 as well as a similarly shaped, on top of the color cup 31 attached lid 32 , The color cup 31 has a volume content of about 300, 600 or 900 ml, is thin-walled, due to the small wall thickness and the selected material slightly elastically deformable, transparent and on its side wall 33 provided with mixing scales (not shown). The lid 32 Here is about half the height of the color cup 31 , Both the color cup 31 , as well as the lid 32 is made of plastic; usually injection molded. The lid 32 can, but does not have to be transparent or translucent. For manufacturing reasons and for mechanical stabilization of the lid on its inside 34 some undercuts, columns and paragraphs 35 exhibit.

The well-proven in practice color cup 31 has a circular disk-shaped bottom 36 on, to the a support edge 37 is preferably integrally formed, by means of which the paint cup 31 can stand independently on a surface. In the ground 36 of the color cup 31 is a ventilation mechanism in the present embodiment 38 provided with a ventilation opening, which can be closed by means of a valve. The valve of the ventilation mechanism 38 must of course when filling the paint cup 31 , during mixing of the material to be sprayed and during use of the paint cup 31 always be closed on a hanging gun, so that no unwanted material leakage takes place. For tight closure, one of several cap elements 70 help, in the present embodiment, a film hinge 71 in one piece on the cup lid 32 sprayed, which can be torn through manually.

But it could also any other, arbitrarily shaped cup or container made of any plastic or any metal as a base for the reservoir 30 can be used, given the aforementioned positive characteristics of the color cup described 31 want to give up.

In the area of the upper cup opening 38 is the color cup 31 according to this embodiment with multiple external thread segments 39 equipped with a detachable, liquid and airtight screw connection between paint cups 31 and lid 32 enable.

The lid 32 owns to the connection with the cup 31 an annular rim 40 , on the inside of several thread segments 41 are provided, in which the external thread segments 39 of the mug 31 can intervene appropriately.

The cup 31 can with the cover removed 32 through the opening 37 with a liquid, in particular a paint or paint components filled. Subsequently, the lid 32 on the upper edge 38 of the color cup 31 turned up and thereby over the thread segments 39 . 41 and the sealing edge of the lid 32 , which then at the upper edge of the cup 38 supports, a liquid-tight connection between cups 31 and lid 32 and thus ultimately the reservoir 30 produced.

The lid 32 has a tubular extension on top 42 , If the reservoir 30 is to be used in a so-called flow cup gun, the tubular extension 42 directly or via an adapter in the above-arranged connection opening of the spray gun or be inserted after it has been turned upside down. For spraying, the spray gun is turned over. The valve of the ventilation mechanism 38 will be opened. The liquid to be sprayed then flows over the tubular extension 42 of the lid 32 evenly in usually operated with compressed air spray gun, which is operated in the present embodiment with compressed air. The storage tank 30 thus owns in the lid 32 an outlet for the material to be sprayed, namely the tubular extension 42 , for the paint or the paint. The extension 42 can after removing the reservoir 30 from the spray gun with a second cap member 70 to be closed; the complete reservoir 30 can then be easily disposed of or, under certain circumstances, if there are still usable material leftovers, simply and safely stored.

The method described above has become known as the "upside-down method"; the reservoir described 30 is sold under the name "RPS cup" in various sizes by the applicant of this patent.

This very advantageous reservoir 30 Because of the invention it is now also possible to use hanger guns without problems. Reason is that in the area of the inlet 100 for the material to be sprayed into the spray gun an air supply into the reservoir 30 is provided.

The storage tank 30 is here with the ground 36 pointing downwards, the tubular extension 42 of the lid 32 then lies in the area of the inlet 100 the spray gun.

In the case of the 1 to 3 apparent particularly preferred embodiment, the air supply takes place in the region of the inlet via a separate component 50 , which is designed as a kind of dowel.

The from the 4 to 10 especially well-known dowels 50 is made of a plastic with resilient properties and formed substantially hollow cylindrical. He has an outside diameter 51 that fits the inside diameter 43 of the tubular extension 42 of the lid 32 is designed. At the upper end 52 of the dowel 50 are several, preferably four longitudinal webs 53 provided, preferably uniformly over the circumference of the dowel 50 are distributed. Between the longitudinal bars 53 are thus groove-like recessed material recesses 54 , Through the recesses 54 can during the use of the spray air in the reservoir 30 flow, whereby a trouble-free flow of material is always guaranteed.

Of course, this also works if there are more or fewer than four recesses 54 be provided; basically a single recess is enough 54 ,

The recess 54 can also be designed as a through hole.

In the present embodiment, the dowel 50 , from its lower end 55 looked at, slotted. Four slots 56 extend about half the length of the anchor 50 , The one between the slots 56 lying rag 57 are at their free end with a latch 58 provided, which protrude outwards and fitting under a paragraph 35 in the extension 42 the cup lid 32 to grab. By means of the inner sides of the cloths 42 he fixes a conveying element for the material to be sprayed, namely the suction hose 17 ,

Of course, this also works if there are more or fewer than four, shorter or longer slots 56 and rags 57 or other embodiments may be provided with a holding function.

At the upper end 52 is the dowel 50 with a torus 59 fitted. If the reservoir 30 connected to the spray gun, seals the torus 59 the assembly at the gun connection.

In the present embodiment, the reservoir 30 not directly, but via a standard adapter 60 connected to the spray gun.

The adapter 60 is essentially hollow cylindrical with an internal thread 61 formed and on the outside of the tubular extension 42 screwed on, this with an external thread 44 is provided. With the help of or any other adapter 60 can the components 15 . 42 . 60 , which have different diameters, easily and safely connected to each other. Of course, adapters are unnecessary for other dimensional conditions.

In the present embodiment, the dowels 50 , the adapter 60 and the reservoir 30 very particularly advantageous dimensionally coordinated so that a perfect at any time stop and interaction of the one component with the other component or all components is guaranteed. In particular, here is the dowel 50 at its upper end 52 designed relatively short, so that in the assembled state at most slightly above the tubular extension 42 on the cup lid 32 survives. The torus 59 is designed chilled around. This will allow the reservoir 30 safe after use with a cap element 50 can be closed.

In the in the 11 and 12 indicated embodiment is in the lid 32 of the rest, not shown, moreover 30 laterally next to a tubular extension 42 which performs the same function as in the previously described embodiments, a tube 62 provided, the cavity fulfills the function of a material recess for the supply of air into the reservoir, in the inlet region 100 the overall assembly of spray gun and reservoir, not shown. The tube 62 is in the present embodiment in one piece with the cup lid 32 injected. In another conceivable embodiment could laterally adjacent to a tubular extension 42 z. B. only one hole can be provided in the z. B. a tube could be inserted. If necessary, the hole and / or the tube could be closed with a stopper, cap or the like.

In the present embodiment, the diameter of the tube 62 about half the size of the extension 42 and the tube 62 is as long as the extension 42 , Of course, also less large tubes 62 possible.

Another variant of the invention is in the 13 to 15 indicated. Here extends around the entire circumference of the tubular extension 42 of the lid 32 Incidentally, also not shown here reservoir 30 a breakthrough 64 , which fulfills the function of a material recess for the supply of air into the reservoir. The breakthrough 64 runs near the lower end 45 of the extension 42 ; its permanent connection with the remaining sections of the lid 32 is by means of a variety of webs 65 ensured by the breakthrough 64 extend. The breakthrough 64 here basically fulfills the function of a material recess for the supply of air into the reservoir, in the inlet area 100 the overall assembly of spray gun and reservoir, not shown. In the present embodiment, the breakthrough 64 in the radial direction about as large as the interior of the extension 42 , Fully or partially closable is the breakthrough 64 by means of a locking ring 66 standing on its underside with a variety of grooves 67 is provided, in number and design on the webs 65 in the lid 32 is tuned. Between the grooves 67 The locking ring has a variety of noses 68 on the spaces between 69 are matched by the breakthrough 64 in the lid 32 be formed. It is envisaged that the locking ring 66 in the present embodiment, prior to assembly of the reservoir on the extension 42 is deferred and stays there permanently. After a movement along the longitudinal axis of the extension 42 can the lock ring 66 with his noses 68 in the interstices 69 the breakthrough 64 intervene and with an opposite movement from the breakthrough 64 be removed. This allows a simple and safe air supply into the reservoir, even if it is used on a hanging gun gun.

Of course, the breakthrough must be 64 not to the entire circumference of the extension to fulfill the air supply function 42 extend and may be more or less large in the radial direction than previously described.

Likewise, the closure of the breakthrough 64 or another breakthrough not on the described locking ring 66 respectively; There are also other embodiments for the closure conceivable, for. B. single pin or peelable sticker or the like.

Likewise, a labyrinth seal or the like, the on-demand closure of the opening 64 , another breakthrough or in the embodiment of the 11 and 12 the required closure of the tube 62 enable.

In 16 is a modified example of 2 shown; the same components are provided with the same reference numerals. In this embodiment, no dowel or the like is present and the air supply does not take place via the lid 32 of the storage container 30 , The air supply is here via a through hole 63 in the fitting belonging to the spray gun 16 accomplished, this fulfills the function of a material recess for the supply of air into the reservoir, in the inlet area 100 the overall assembly of spray gun and reservoir, not shown. The hole 63 has a fairly small diameter compared to the fitting 16 , You could, if necessary, for example, be closed with a stopper or the like. A labyrinth seal or the like could also be provided.

In another embodiment, for the supply of air into the reservoir could be a bore 63 or the like in the connection piece 15 the spray gun or be provided at another point of the spray gun. The hole 63 could be connected via a hose or the like with the reservoir or connectable. The hose could be inserted, screwed or adhesively glued or welded in one of the two components or welded.

Of course, all conceivable modifications of the described objects of the invention are encompassed, whose core is that not in the bottom or in the side walls of the reservoir for the material to be sprayed, but the inlet of the inlet for the material to be sprayed into the spray gun, an air supply in the Reservoir is provided. As a result, a universal applicability of the reservoir is guaranteed, both in flow cup guns, as well as in hanging guns.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1718415 B1 [0001, 0002]

Claims (30)

Spray gun for paints, varnishes, adhesives or other flowable materials, with a body ( 1 ), which has an inlet ( 100 ) and an outlet ( 7 ) possesses for the material, and with a reservoir ( 30 ) for the material, which with the inlet ( 100 ), characterized in that in the region of the inlet ( 100 ) an air supply into the reservoir ( 30 ) is provided. Spray gun according to claim 1, characterized in that in the region of the inlet ( 100 ) at least one material recess ( 54 . 62 . 63 . 64 ) is provided. Spray gun according to claim 1 or 2, characterized in that the at least one material recess ( 54 ) on a dowel ( 50 ), which preferably has a holding function for at least one further component ( 16 . 17 . 42 . 60 ) Has. Spray gun according to claim 3, characterized in that the dowel ( 50 ) substantially hollow cylindrical with an outer diameter ( 51 ) is formed, which matches the inner diameter ( 43 ) of a tubular extension ( 42 ) of a closure lid ( 32 ) for the storage container ( 30 ) and that the at least one material recess ( 54 ) as a recess or hole in the dowel ( 50 ) is configured. Spray gun according to claim 3 or 4, characterized in that the dowel ( 50 ) is slotted and at least one locking element ( 58 ) having. Spray gun according to one of claims 3 to 5, characterized in that the dowel ( 50 ) with at least one bead ( 59 ) Is provided. Spray gun according to one of claims 3 to 6, characterized in that the dowel ( 50 ) a conveying element ( 17 ) can hold for the material to be sprayed. Spray gun according to one of the preceding claims, characterized in that an adapter ( 60 ) is present, with the components ( 15 . 42 . 60 ) of the spray gun, which have different diameters, can be easily and safely connected to each other. Spray gun according to one of claims 2 to 8, characterized in that in the region of the inlet ( 100 ) at least one tube ( 62 ) to the air supply in the reservoir ( 30 ) is provided. Spray gun according to one of claims 2 to 8, characterized in that in the region of the inlet ( 100 ) at least one bore ( 63 ) to the air supply in the reservoir ( 30 ) is provided. Spray gun according to one of claims 2 to 8, characterized in that in the region of the inlet ( 100 ) at least one breakthrough ( 64 ) to the air supply in the reservoir ( 30 ) is provided. Spray gun according to one of the preceding claims, characterized in that the air supply into the reservoir ( 30 via a closure lid ( 32 ) of the storage container ( 30 ) he follows. Spray gun according to one of claims 1 to 11, characterized in that the air supply into the reservoir ( 30 ) via an opening ( 63 ) in the body ( 1 ) of the spray gun. Reservoir ( 30 ) for liquid material, in particular for use on a spray gun, with a paint cup ( 31 ), which preferably at least one transparent or translucent, preferably provided with at least one mixing scale side wall ( 33 ) and a floor ( 36 ), which preferably has a ventilation mechanism ( 38 ) and preferably a support edge ( 37 ), one on the color cup ( 31 ) attachable cap ( 32 ), preferably via at least one film hinge ( 71 ) at least one cap element ( 70 ) is releasably attached, and a preferably tubular extension ( 42 ) for direct or indirect connection to the spray gun body ( 1 ) characterized in that in the region of the extension ( 42 ) an air supply into the reservoir ( 30 ) is provided. Reservoir ( 30 ) according to claim 14, characterized in that in the extension ( 42 ) a dowel ( 50 ) or the like, the at least one material recess ( 54 ) having. Reservoir according to claim 15, characterized in that the extension ( 42 ) tubular and the dowel ( 50 ) substantially hollow cylindrical with an outer diameter ( 51 ) is formed, which matches the inner diameter ( 43 ) of the tubular extension ( 42 ) and that the at least one material recess ( 54 ) as a recess or hole in the dowel ( 50 ) is configured. Reservoir ( 30 ) according to claim 15 or 16, characterized in that the dowel ( 50 ) is slotted and at least one locking element ( 58 ) having. Reservoir ( 30 ) according to one of claims 15 to 17, characterized in that the dowel ( 50 ) with at least one sealing bead ( 59 ) Is provided. Reservoir ( 30 ) according to one of claims 15 to 18, characterized in that the dowel ( 50 ) preferably a holding function for at least one further component ( 16 . 17 . 42 . 60 ) Has. Reservoir ( 30 ) according to claim 19, characterized in that the dowel ( 50 ) directly or indirectly a conveying element ( 17 ) can hold for the material to be sprayed. Reservoir ( 30 ) according to claim 19 or 20, characterized in that the conveying element ( 17 ) with a sieve ( 18 ) Is provided. Reservoir ( 30 ) according to one of claims 14 to 21, characterized in that the extension ( 42 ) via an adapter ( 60 ) is connectable to the spray gun. Reservoir ( 30 ) according to claims 19 and 22, characterized in that the dowel ( 50 ) with the adapter ( 60 ) cooperates. Reservoir ( 30 ) according to claim 20 or 23, characterized in that the dowel ( 50 ) with a connection piece ( 16 ) for the conveying element ( 17 ) cooperates. Air supply for a storage container ( 30 ) with a preferably tubular extension ( 42 ) for direct or indirect connection to a spray gun body ( 1 ), characterized in that an air supply element ( 50 ) as a substantially hollow cylindrical of the dowels ( 50 ) is trained. Air supply according to claim 25, characterized in that at least one material recess ( 54 ) as a recess or hole in the dowel ( 50 ) is configured. Air supply according to claim 26, characterized in that the material recess ( 54 ) is designed as a longitudinal groove. Air supply according to one of claims 25 to 27, characterized in that the dowel ( 50 ) at least one slot ( 56 ) having. Air supply according to claim 28, characterized in that in addition to the at least one slot ( 56 ) a rag ( 57 ), which at least at its free end with a detent ( 58 ) or the like. Air supply according to one of claims 25 to 29, characterized in that at least one air supply element ( 50 ) is made of a plastic with resilient properties.

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