EP2822700A1

EP2822700A1 - Spray gun and accessory

Info

Publication number: EP2822700A1
Application number: EP13719372.8A
Authority: EP
Inventors: Jens Brose
Original assignee: SATA GmbH and Co KG
Current assignee: SATA GmbH and Co KG
Priority date: 2012-03-09
Filing date: 2013-02-28
Publication date: 2015-01-14
Anticipated expiration: 2033-02-28
Also published as: EP2822700B1; DE202012002310U1; WO2013131626A1; CN203342981U; CN204396227U; DE102012004575A1

Abstract

The invention relates to a spray gun with an accessory, which is intended for spraying paints, coatings, adhesives or other flowable materials, comprising a body (1), which has an inlet (100) and an outlet (7) for the material, and comprising a reservoir (30) for the material, which can be connected to the inlet (100), which gun is characterized in that an air supply (63) into the reservoir (30) is provided in the region of the inlet (100).

Description

description

Spray gun and accessories

The invention relates to a spray gun with accessories.

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. At 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 suction principle known. In recent years, so-called "upside-down cups", which are designed for single use, have become very popular in gravity-fed flow cups, for example, such a cup is known from European patent EP 1 718 415 B1 consists of a container made of plastic and a lid which can be placed thereon for closing the cup The connection on the top of the lid provides connection means for attaching and fixing the cup to a spray gun or an adapter which can be fastened or attached to the spray gun. For example, pressure equalization between the interior of the cup and the environment may be required, preferably in the cup bottom

reclosable ventilation opening or a corresponding valve may be provided.

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. However, it would be desirable to be able to use the cup known from the European patent EP 1 718 415 B1 or other cups suitable for single use also for hanging guns. 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.

CONFIRMATION COPY 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 without any problems in hanging spray 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 known from the

Subclaims and those described below with reference to drawings

Embodiments can be seen.

In the drawings shows:

1 shows a section through a spray gun with suspension cup,

2 shows a detail from FIG. 1,

3 is a detail of FIG. 1,

4 to 9 another detail in different views,

10 is a first schematic diagram,

1 1 and 12 a second schematic diagram in section and in top view,

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

Fig. 15 shows an accessory to the third schematic diagram

and

Fig. 16 is a fourth schematic diagram in section.

The spray gun of Fig. 1 and 2 and is a compressed air driven paint spray gun and has a gun body 1 with a handle portion 2 and a head 3. These two sections 2 and 3 are as usual at an angle of about 100 degrees to each other. The grip area 2 has a compressed air connection 20 at its lower end. By the grip area 2 and through the head 3 extend from the compressed air connection 20 from a plurality of air channels 21 which terminate at the front end 8 of the head 3 of the spray gun. The quantity and the pressure of the air flowing through these air ducts 21 can be regulated in the usual way by means of an air micrometer 22. The front end 8 of the head 3 is provided with an air nozzle 23 having protruding horns 24 with openings 25. 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 guided through the front end 8 of the head 3 of the spray gun, in the center of which a passage opening 9 for a paint needle 10 is provided. The front end 8 of the head 3 is in non-operation of the spray gun by a

Mechanism closed. The mechanism is by means of a trigger guard 1 1

operable; The amount of material can be regulated by a device that has a

Regulating screw 12 has.

The mechanism for the trigger guard 11 and the paint needle 10 are frictionally actuated by springs 13, 14.

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

At the bottom of the front end 8 of the head 3 of the spray gun is the inlet portion 100 for the material to be sprayed. In the present embodiment, here a downwardly projecting, hollow connection piece 15 is integrally formed for a reservoir 30 for the material to be sprayed. The connecting piece 15 is provided in the present embodiment, inside with a screw thread into which a known per se, separate connector 16 is screwed from a sealing plastic material. In some circumstances, for example, when the spray gun is made of more or less elastic plastic material, such a connecting piece 16 can be dispensed with. At the connector 16 is a suction hose 17 as

Delivery element for the material to be sprayed releasably attached. However, it could also be permanently connected to the connecting piece 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 could also be a more or less stiff, transparent, translucent or opaque intake pipe Plastic, metal or other material can be used. At its lower, free end of the suction hose 17 is equipped with a sieve 18. The screen 18 is bag-shaped here and consists of regions reinforced by ribs plastic material. At its free end, a perforated plate 19 is provided in which the suction hose 17 engages fitting. An insoluble, possibly one-piece connection between the sieve 18 and the suction hose 17 or the like can also be provided. Of the

Intake hose 17 dives far into the material, not shown, to be sprayed in the reservoir 30 a.

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

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

The very well-proven in practice paint cup 31 has a circular disk-shaped bottom 36, to which a support edge 37 is preferably integrally formed, by means of which the paint cup 31 can stand independently on a base. In the bottom 36 of the

Farbbechers 31, a ventilation mechanism 38 is provided with a ventilation opening in the present embodiment, which can be closed by a valve. The valve of the ventilation mechanism 38 must of course always be closed when filling the paint cup 31, when mixing the material to be sprayed and during use of the paint cup 31 on a hanging gun gun, so that no unwanted material leakage takes place. For tight closure, one of several cap elements 70 can help, in the present embodiment via a Film hinge 71 are molded integrally on the cup lid 32, which can be torn through manually.

It could also be any other, arbitrarily shaped cup or container made of any plastic or any metal used as a base for the reservoir 30, if you want to dispense with the aforementioned positive properties of the ink cup 31 described.

In the area of the upper cup opening 38, the color cup 31 is in accordance with this

Embodiment equipped with a plurality of external thread segments 39, which allow a detachable, liquid and airtight screw connection between paint cup 31 and lid 32.

The lid 32 has for connection to the cup 31 has an annular edge 40, on the inside of a plurality of thread segments 41 are provided, in which the

External thread segments 39 of the cup 31 can engage appropriately.

The cup 31 can be filled with the lid 32 removed through the opening 37 with a liquid, in particular a paint or paint components. Subsequently, the lid 32 is turned on the upper edge 38 of the paint cup 31 and thereby on the thread segments 39, 41 and the sealing edge of the lid 32, which is then supported on the upper cup rim 38, a liquid-tight connection between cup 31 and lid 32 and thus ultimately the reservoir 30 is made.

If the reservoir 30 is to be used in a so-called flow cup gun, the tubular extension 42 can be used or inserted directly or via an adapter in the above-arranged connection opening of the spray gun, after this on the Head was put. For spraying, the spray gun is turned over. The valve of the vent mechanism 38 is then opened. The liquid to be sprayed then flows through the tubular extension 42 of the lid 32 uniformly in usually operated with compressed air spray gun, which is operated in the present embodiment with compressed air. Of the

Reservoir 30 thus has in the lid 32 an outlet for the sprayed

Material, namely the tubular extension 42, for the paint or the paint. The extension 42 can be closed by removing the storage container 30 from the spray gun with a second cap member 70 .; the complete reservoir 30 can thereafter easily disposed of or, under certain circumstances, when there are still usable scraps of material, easily and safely stored.

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

Due to the invention, this very advantageous storage container 30 can now also be used without any problem with suspended spray guns. The reason for this is that in the region of the inlet 100 for the material to be sprayed into the spray gun, an air supply into the reservoir 30 is provided.

The reservoir 30 is used here with the bottom 36 facing down, the tubular extension 42 of the lid 32 is then in the region of the inlet 100 of the spray gun.

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

The particularly apparent from FIGS. 4 to 10 dowel 50 is made of a plastic material with resilient properties and formed substantially hollow cylindrical. It has an outer diameter 51 which is designed to match the inner diameter 43 of the tubular extension 42 of the lid 32. At the upper end 52 of the dowel 50 a plurality, preferably four longitudinal webs 53 are provided, which are preferably distributed uniformly over the circumference of the dowel 50. Between the longitudinal webs 53 are thus groove-like recessed material recesses 54. Through the recesses 54 can flow during use of the spray gun air into the reservoir 30, whereby a trouble-free material flow is always guaranteed.

Of course, this also works if more or less than four

Recesses 54 are provided; basically a single recess 54 is sufficient.

The recess 54 can also be designed as a through hole. In the present embodiment, the dowel 50, viewed from its lower end 55, slotted. Four slots 56 extend approximately over half the length of the anchor 50. The lying between the slots 56 tabs 57 are provided at its free end with a locking lug 58 which project outwardly and fitting under a paragraph 35 in

Extension 42 of the cup lid 32 engage. By means of the inner sides of the tabs 42, it fixes a conveying element for the material to be sprayed, namely the suction hose 17.

Of course, the whole also works if more or fewer than four, shorter or longer slots 56 and lobes 57 or other embodiments with holding function are provided.

At the upper end 52 of the dowel 50 is equipped with a torus 59. When the reservoir 30 is connected to the spray gun, the annular bead 59 seals the assembly at the gun port.

In the present embodiment, the reservoir 30 is not directly, but connected via a commercially available adapter 60 with the spray gun.

The adapter 60 is substantially hollow cylindrical with an internal thread 61

formed and screwed onto the outside of the tubular extension 42, which is provided for this purpose with an external thread 44. With the help of or any

other adapter 60, the components 15, 42, 60, the different

Have diameter, easily and safely connected to each other.

Of course, adapters are unnecessary for other dimensional conditions.

In the present embodiment, the dowel 50, the adapter 60 and the

Reservoir 30 very particularly advantageous dimensionally matched to one another that a perfect at any time stop and interaction of one component with the other component or all components is guaranteed. In particular, here the dowel 50 is designed relatively short at its upper end 52, so that he mounted in the

Condition possibly slightly beyond the tubular extension 42 on the cup lid 32 protrudes. The annular bead 59 is designed chamfered round. This will allow the reservoir 30 to securely secure with a cap member 50 after use

can be closed. In the embodiment indicated in FIGS. 1 and 12, in the lid 32 of the storage container 30, which is otherwise not shown, is located laterally next to a tubular extension 42, which has the same function as in the previously described

Embodiments meets, a tube 62 is provided, the cavity fulfills the function of a material recess for the supply of air into the reservoir, in the inlet portion 100 of the overall assembly of spray gun and reservoir, not shown. The tube 62 is in the present

Embodiment molded in one piece with the cup lid 32. In another conceivable embodiment, laterally next to a tubular extension 42, e.g. only a hole may be provided into which e.g. 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 is about half the diameter of the extension 42 and the tube 62 is as long as the extension 42. Of course, less large tubes 62 are possible.

Another variant according to the invention is indicated in FIGS. 13 to 15. Here, too, around the entire circumference of the tubular extension 42 of the lid 32, not shown here reservoir 30 extends an opening 64, which fulfills the function of a material recess for the air supply into the reservoir. The aperture 64 extends near the lower end 45 of the extension 42;

its constant connection with the remaining portions of the lid 32 is ensured by means of a plurality of webs 65 which extend through the opening 64. The breakthrough 64 basically fulfills the function of a

Material recess for the air supply to the reservoir, in the

Inlet area 100 of the unrepresented overall assembly of spray gun and reservoir. In the present embodiment, the opening 64 in the radial direction is about as large as the interior of the extension 42. Fully or partially closed, the opening 64 by means of a closure ring 66 which is provided on its underside with a plurality of grooves 67, in number and

Design is matched to the webs 65 in the lid 32. Between the grooves 67, the locking ring has a plurality of lugs 68 which are matched to the spaces 69 formed by the opening 64 in the lid 32. It is envisaged that the locking ring 66 is pushed in the present embodiment, prior to assembly of the reservoir on the extension 42 and constantly there remains. After a movement along the longitudinal axis of the extension 42 of the locking ring 66 can engage with its noses 68 in the interstices 69 of the opening 64 and are removed with an opposite movement of the opening 64. This will provide a simple and safe air supply in the

Reservoir allows, even if it is used on a hanging gun gun.

Of course, the breakthrough 64 does not have to extend around the entire circumference of the extension 42 to fulfill the air supply function and can in

Radial direction more or less large than previously described.

Likewise, the closure of the aperture 64 or another

Breakthrough not done via the described locking ring 66; 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 required closure of the opening 64, another breakthrough or in the embodiment of FIGS. 1 1 and 12, the required closure of the tube 62nd

enable.

In Fig. 16 a modified example of Fig. 2 is shown; the same components are provided with the same reference numerals. In this embodiment, no dowel or the like is present and the air is not supplied via the lid 32 of the reservoir 30. The air supply is accomplished here via a through hole 63 in the spray gun associated fitting 16, here the function of a material recess for the air supply filled in the reservoir, in the inlet region 100 of the unrepresented overall assembly of spray gun and reservoir. The bore 63 has a fairly small diameter compared to the fitting 16. It could be closed with a plug or the like if necessary. A labyrinth seal or the like could also be provided.

In another embodiment, a bore 63 or the like could be provided in the connection piece 15 of the spray gun or at another point of the spray gun for supplying air into the reservoir. The bore 63 could have a Hose or the like connected to 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 comprises, the 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 in the spray gun, an air supply is provided in the reservoir. This is a universal substitution of the

Guaranteed reservoir, both with flow cup guns, as well as with hanging guns.

Claims

Spray gun and accessories claims

A spray gun for paints, varnishes, adhesives or other flowable materials, comprising a body (1) having an inlet (100) and an outlet (7) for the material, and having a reservoir (30) for the material which can be connected to the inlet (100), characterized in that in the region of the inlet (100) has a

Air supply is provided in the reservoir (30).

2. 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.

3. Spray gun according to claim 1 or 2, characterized in that the at least one material recess (54) on a dowel (50) is provided, which preferably has a holding function for at least one further component (16, 17, 42, 60).

4. Spray gun according to claim 3, characterized in that the dowel (50) is formed substantially hollow cylindrical with an outer diameter (51), which matches the inner diameter (43) of a tubular extension (42) of a

Closure lid (32) for the reservoir (30) is designed and that the at least one material recess (54) as a recess or hole in the dowel (50) is configured.

5. Spray gun according to claim 3 or 4, characterized in that the dowel (50) is slotted and has at least one latching element (58).

6. Spray gun according to one of claims 3 to 5, characterized in that the dowel (50) is equipped with at least one bead (59).

7. Spray gun according to one of claims 3 to 6, characterized in that the dowel (50) can hold a conveying element (17) for the material to be sprayed.

8. Spray gun according to one of the preceding claims, characterized

characterized in that an adapter (60) is provided, with the components (15, 42, 60) of the spray gun, which have different diameters, can be easily and safely connected to each other.

9. 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) for supplying air into the

Reservoir (30) is provided.

10. 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) for supplying air into the

Reservoir (30) is provided.

1 1. Spray gun according to one of claims 2 to 8, characterized in that in the region of the inlet (100) at least one opening (64) for supplying air into the

Reservoir (30) is provided.

12. Spray gun according to one of the preceding claims, characterized in that the air supply into the reservoir (30 via a closure cover (32) of the reservoir (30).

13. 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.

14. Storage container (30) for liquid material, in particular for use on a spray gun, with a paint cup (31), preferably at least one transparent or translucent, preferably provided with at least one mixing scale

Side wall (33) and a bottom (36), preferably a

Ventilation mechanism (38) and preferably a support edge (37), one on the paint cup (31) attachable closure lid (32) on which preferably at least one film hinge (71) at least one cap member (70) is detachably attached, and preferably one 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.

15. Reservoir (30) according to claim 14, characterized in that in the extension (42) a dowel (50) or the like is provided, the at least one

Material recess (54).

16. Reservoir according to claim 15, characterized in that the extension (42) is tubular and the dowel (50) substantially hollow cylindrical with a

Outer diameter (51) is formed, which is designed to match the inner diameter (43) of the rohrformigen extension (42) and that the at least one material recess (54) as a recess or hole in the dowel (50) is configured.

17. Storage container (30) according to claim 15 or 16, characterized in that the dowel (50) is slotted and has at least one latching element (58).

18. Reservoir (30) according to any one of claims 15 to 17, characterized in that the dowel (50) is equipped with at least one sealing bead (59).

19, storage container (30) according to one of claims 15 to 18, characterized in that the dowel (50) preferably has a holding function for at least one further component (16, 17, 42, 60).

20. 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.

21, reservoir (30) according to claim 19 or 20, characterized in that the conveying element (17) is equipped with a sieve (18).

22, reservoir (30) according to any one of claims 14 to 21, characterized in that the extension (42) via an adapter (60) is connectable to the spray gun.

23, reservoir (30) according to claims 19 and 22, characterized in that the dowel (50) with the adapter (60) cooperates.

24, reservoir (30) according to claim 20 or 23, characterized in that the dowel (50) with a connecting piece (16) for the conveying element (17) cooperates.

25. Air supply for a storage container (30) with a preferably rohrformigen extension (42) for direct or indirect connection to a spray gun body (1), characterized in that an air supply element (50) is designed as a substantially hollow cylindrical dowel (50) ,

26. 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.

27. Air supply according to claim 26, characterized in that the material recess (54) is designed as a longitudinal groove.

28. Air supply according to one of claims 25 to 27, characterized in that the dowel (50) has at least one slot (56).

29. Air supply according to claim 28, characterized in that in addition to the at least one slot (56) is a tab (57) which is provided at least at its free end with a latching lug (58) or the like.

30. Air supply according to one of claims 25 to 29, characterized in that at least one air supply element (50) made of a plastic with elastic

Properties is made.