EP2451586B1 - Paint spray gun - Google Patents

Description

The invention relates to a paint spray gun according to the preamble of claim 1 and an associated compressed air distributor insert according to the preamble of claim 18.

A generic paint spray gun is from the EP 0 706 832 B1 known. This has a compressed air distributor, which is connected to a compressed air supply line and distributes the compressed air of the compressed air supply line to a horn air supply line and an omnidirectional supply line. The amount of compressed air supplied to the horn air supply line can be adjusted by screw adjustment of a plug, which has a terminal sealing plug for the continuous opening or closing of the horn air supply line. In order to limit the pressure occurring in the round jet area to a maximum value, when the pressure in the omnidirectional zone rises above the maximum value permitted for paint spray guns when closing the horn air, the chick, viewed from its end, has a larger diameter area after sealing plug, which closes the horn air supply line also the airway between compressed air supply line and round jet supply line continuously narrowed. The chick is moved there via a rotating knurled knob in the axial direction. The solution described there has the disadvantage that due to the axial adjustment kinematics of the plug for opening or closing the lines in the compressed air distributor, the knurled knob must be turned beyond one revolution. Also, the formation of the chick with the sealing cup and the disc-like plate, the air distribution in the compressed air manifold predetermine or calculate inaccurately. In addition, the multi-part structure is unfavorable there manufacturing technology. In addition, the distance between the knurled knob and the gun body changes during adjustment, which is often perceived as disadvantageous.

The invention is therefore based on the object to provide a paint spray gun and a compressed air distributor, which overcome the above-mentioned disadvantages and allow easy to use adjustment of the pressure and an easily calculable compressed air distribution in the paint spray gun.

This object is achieved by a paint spray gun with the features of claim 1 and a compressed air distribution insert with the features of claim 18. Advantageous embodiments and preferred developments of the invention can be taken from the dependent claims.

An aforementioned paint spray gun according to the invention is characterized in that the actuating element is designed as a rotatably held in the axial direction of the axis of rotation in the compressed air distribution space and rotatable about the rotation axis rotary distributor for opening or closing the mouths of the round jet line and the broad jet line. By means of this exclusively radial adjustment kinematics of the rotary distributor, a significantly smaller adjustment angle of completely closed to completely open wide-jet opening can be made possible in the present case. In the solution after the EP 0 706 832 B1 However, the adjustment angle is about 410 °, the local knurled knob must therefore be rotated from the open to the closed horn air opening by more than a full turn. This prevents among other things a simple position indication of the current opening of the horn air opening. Further, the design of the rotary distributor and thus the setting of the correct ratio of the different orifices in the compressed air distribution chamber to each other can be relatively easily simulated, calculated or determined empirically. Another advantage is that the handle for the rotary distributor always occupies the same distance from the gun body.

In a preferred embodiment of the invention, the compressed air distribution chamber is designed as a compressed air distributor cylinder having an opening and walls formed by a bottom and a lateral surface, wherein the rotary distributor has at its end facing away from the rotary handle and / or facing end having a voltage applied to the lateral surface guide. In this way, a simple structure can be ensured with good guidance of the rotary distributor in the compressed air distribution cylinder. In terms of manufacturing technology, the guide can be a circular disk and / or a circular ring with an outer diameter adapted to the inner diameter of the compressed air distributor cylinder.

Preferably, the rotary distributor can be formed by a lateral surface portion of a cylinder about the axis of rotation, which slides on the lateral surfaces of the compressed air distributor cylinder rotationally and conclusively along.

The round jet orifice, the broad jet orifice and / or the compressed air supply orifice can preferably open into the lateral surface of the compressed air distribution cylinder and the round jet adjustment region, the wide jet adjustment region or the compressed air supply adjustment region can be rotatable along the lateral surface of the compressed air distribution cylinder. Alternatively or additionally, the round jet orifice, the broad jet orifice and / or the compressed air supply orifice can also open into the bottom of the compressed air distributor cylinder, in which case the respective adjustment range can then be provided there.

In order to enable a simple indication of the position of the rotary distributor in the compressed air distribution chamber, a position indicator for indicating the position of the rotary distributor in the compressed air distribution chamber can be provided on the rotary handle.

An aforementioned compressed air distributor insert according to the invention is characterized in that at a usable in the compressed air distribution chamber end of the distributor spindle is not provided opposite the rotary handle in the axial direction of the axis of rotation and rotatable about the rotation axis rotary distributor.

Fig. 1

zwei Schnittansichten durch eine erfindungsgemäßen Farbspritzpistole mit vollständig geöffneten Rund- und Breitstrahlleitungen entlang einer

1. a) Rundstrahlleitung mit Einzelheit Z;
2. b) Breitstrahlleitung mit Einzelheit Y;

Fig. 2

mehrere Ansichten eines Druckluftverteilers mit vollständig geöffneten Rund- und Breitstrahlleitungen, nämlich

1. a) eine frontale Draufsicht auf einen Rändelknopf des Druckluftverteilers;
2. b) eine seitliche Draufsicht auf den Druckluftverteiler aus Fig. 2 a) von links;
3. c) einen Schnitt durch den Druckluftverteiler aus Fig. 2 a) längs der Linie A-A;
4. d) einen Schnitt durch den Druckluftverteiler aus Fig. 2 b) längs der Linie B-B;
5. e) einen Schnitt durch den Druckluftverteiler aus Fig. 2 b) längs der Linie C-C;

Fig. 3

zwei Schnittansichten ähnlich Fig. 1 mit teilweise geöffneten Rund- und Breitstrahlleitungen;

Fig. 4

die Ansichten aus Fig. 2 mit teilweise geöffneten Rund- und Breitstrahlleitungen;

Fig. 5

zwei Schnittansichten ähnlich Fig. 1 mit vollständig geschlossenen Rund- und Breitstrahlleitungen;

Fig. 6

die Ansichten aus Fig. 2 mit vollständig geschlossenen Rund- und Brei tstrahlleitungen;

Fig.7

eine schematische dreidimensionale Ansicht einer Druckluft-Verteilerspindel
und

Fig. 8

eine frontale Draufsicht auf einen anderen Rändelknopf des Druckluftverteilers.

Other features and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the accompanying drawings. These show:

Fig. 1

Two sectional views through a paint spray gun according to the invention with fully open round and wide beam lines along a

1. a) round jet line with detail Z;
2. b) wide beam line with detail Y;

Fig. 2

several views of a compressed air distributor with fully open round and wide beam lines, namely

1. a) a frontal plan view of a knurled knob of the compressed air distributor;
2. b) a lateral plan view of the compressed air distributor Fig. 2 a) from the left;
3. c) a section through the compressed air distributor Fig. 2 a) along the line AA;
4. d) a section through the compressed air distributor Fig. 2 b) along the line BB;
5. e) a section through the compressed air distributor Fig. 2 b) along the line CC;

Fig. 3

similar to two sectional views Fig. 1 with partially opened round and wide beam lines;

Fig. 4

the views Fig. 2 with partially opened round and wide beam lines;

Fig. 5

similar to two sectional views Fig. 1 with completely closed round and wide beam lines;

Fig. 6

the views Fig. 2 with completely closed round and pulp jet lines;

Figure 7

a schematic three-dimensional view of a compressed air distributor spindle
and

Fig. 8

a frontal plan view of another knurled knob of the compressed air distributor.

Fig. 1 a) shows a section through a paint spray gun 1 with a handle 2 and a paint nozzle head 3. The paint nozzle head 3 has a central round jet 4 and two horns arranged on broad-jet nozzles 5. The round jet 4 is an in Fig. 1 a) shown round jet line 6 supplied with compressed air, while the wide jet nozzles 5 via an in Fig. 1 b) shown wide jet line 7 are supplied with compressed air. This embodiment of the paint spray gun 1 is known per se. The round jet line 6 as well as the broad jet line 7 open at their ends remote from the paint nozzle head 3 with a Rundstrahlleitungsmündung 6 'and Breitstrahlleitungsmündung 7' in a form of compressed air distribution cylinder 8 compressed air distribution chamber of a compressed air distributor. 9

The compressed air distribution cylinder 8 is acted upon via a compressed air supply port 10 'of a compressed air supply line 10 and a known valve device 11 from the compressed air supply 12 with compressed air. The valve device 11 is operated in a known manner by means of a trigger 11a, so that via the compressed air supply 12 from a compressed air source, not shown, for example, a compressor, compressed air can be introduced into the compressed air distribution cylinder 8.

In Fig. 1 a) the section through the spray gun passes through the round jet line 6, while he Fig. 1 b) passes through the wide beam line 7. As shown in particular the details Z and Y, the round beam line 6 is from the viewer of Fig. 1 seen before and in the paint spray gun 1 above the wide beam line. 7

The paint spray gun 1 according to the invention differs significantly from conventional paint spray guns by the compressed air distributor 9 according to the invention, which is based on Fig. 2 and Fig. 7 is described in detail. Fig. 2 a) shows a plan view of the pressure distributor 9 from Fig. 1 , Fig. 2 b) shows a side view of a section of the paint spray gun of Fig. 2 a) on the left with easily recognizable round jet line 6 and wide jet line 7. Fig. 2c) shows a section along the line AA in Fig. 2 a), Fig. 2 d) a section along the line BB in Fig. 2 b) and Fig. 2 e) a section along the line CC in Fig. 2 b) ,

In order to adjust the compressed air distribution in the compressed air distribution cylinder 8 and the pressure in the round jet line 6 and wide jet line 7, in the compressed air distribution cylinder 8 is an in Fig. 7 shown radially adjustable distributor spindle 13 is used with a rotary distributor 14.

The distributor spindle 13 and thus the rotary distributor 14 can be rotated radially around a rotation axis D in the compressed air distributor cylinder 8 by means of a rotary handle designed as a knurled knob 15, which serves as a handle. The knurled knob 15 may vary from the one shown in FIG Fig. 2 a) shown position with open Breitstrahlleitungsmündung 7 'clockwise on the in Fig. 4 a) shown position with partially open wide jet line mouth 7 'in the in Fig. 6 a) shown position with closed broad jet line mouth 7 'are rotated. As a result, the compressed air supply to the wide jet nozzles 5 at the horns of the paint nozzle head 3 is successively reduced to the non-pressurized state. Turn knurled knob 15 clockwise over in Fig. 6 a) shown position or counterclockwise on the in Fig. 2 a) shown position is prevented by stops 21, which are formed in one piece with the spray gun body 1 in the present embodiment (see Fig. 2d . 4d . 6d and 2e, 4e and 6e) This ensures that, in particular in the in Fig. 6 a) shown fully closed wide jet port 7 'not by accidentally continued rotation in a clockwise direction again compressed air is passed into the broad jet line 7 and the minimum amount or reduced amount of air in the round jet line 6 is not increased or further reduced.

The knurled knob 15 always assumes the same distance 22 to the gun body 1. The distance is chosen so that penetration of overspray or the like to the distributor spindle 13 can not take place. In the exemplary embodiment, it is about 1.2 mm. The inventive design thus has a high reliability. In addition, possible irritation due to an upright handle can be avoided.

In Fig. 2c) is the area of the paint spray gun 1 can be seen, in which the compressed air distribution cylinder 8 is introduced in the form of a cylindrical bore. The bottom 8a of the bore is flat and is substantially at an angle of 90 ° to a lateral surface 8b of the compressed air distribution cylinder 8. The bottom 8a and lateral surface 8b form the walls of the compressed air distribution cylinder 8. From in Fig. 2c) below, the bore of the compressed air supply line 10 can be seen, while the round jet line 6 and the wide jet line 7 offset by substantially 90 ° in the circumferential direction of the compressed air distribution cylinder 8 to the compressed air supply line 10 open into the compressed air distribution cylinder 8. The rotary distributor 14 can be inserted from an opening 8c of the compressed air distribution cylinder 8 in this.

The rotary distributor 14 has at its in Fig. 7 lower and in Fig. 2c) right end of a circular bottom plate 16. At the opposite end of the rotary distributor 14, the distributor spindle 13 has a circular cover plate 17 which largely seals the interior of the compressed air distributor cylinder 8 to the outside. Both the bottom plate 16 and the cover plate 17 serve as a rotary guide of the rotary distributor 14 in the compressed air distribution cylinder 8 and provide a contact pressure of the rotary distributor 14 to the shell inner surfaces of the Druckluftverteilerzylinders 8. For this purpose, the bottom plate 16 as well as the cover plate 17 to the inner diameter of the Druckluftverteilerzylinders. 8 adapted to allow an exact centric rotation without much play and at the same time a good contact of the rotary distributor 14 is ensured to the shell inner surfaces to allow a defined coverage of the round jet port 6 ', the wide jet port 7' and the compressed air supply port 10 '.

In the present embodiment, the rotary distributor 14 is formed in two parts. In his in Fig. 7 The area shown above 25, which extends from the thread 27 up to and including the cover plate 17, the rotary distributor 14 is made of metal, namely brass. This ensures a particularly high material strength as well as a precise guidance. On the other hand, the lower region 26, which extends up to and including the bottom disk 16, is made of plastic, namely polyamide. It is made slightly larger in the width dimension, so that it is slightly squeezed after insertion into the spray gun 1. This ensures excellent sealed guidance. In addition, despite the relatively complicated design, he could easily be finished by injection molding due to the specified choice of material. Because of the chosen combination of materials, the production costs of the rotary distributor 14 can accordingly be kept within the desired limits.

Of course, however, a one- or multi-part production of the rotary distributor 14 for any other metal or any other plastic or any other material combinations possible.

At its upper end, the distributor spindle 13 is held rotatably in the compressed air distributor cylinder 8 by means of a threaded sleeve 18, so that the rotary distributor 14 is rotatable about the axis of rotation D in the compressed air distributor cylinder 8, but not slidable in the axial direction of the axis of rotation D in the compressed air distributor cylinder 8. The threaded sleeve 18 is screwed by means of an external thread into a corresponding internal thread at the outer end of the compressed air distribution cylinder 8. The rotary distributor 14 facing away from annular area of the cover plate 17 serves as a stop for a compressed air distributor cylinder 8 facing end side of the threaded sleeve 18. The threaded sleeve 18 thus ensures a secure fit of the distributor spindle 13 and thus the rotary distributor in the compressed air distribution cylinder 8 and seals in cooperation with one here ring-shaped seal 23 in addition to the cover plate 17, the interior of the compressed air distribution cylinder 8 against air leakage to the outside.

In addition, the threaded sleeve 18 is sealed relative to the gun body 1.

The knurled knob 15 is rotatably on a in Fig. 2c) Threaded screw 19 shown connected to the distributor spindle 13. The threaded screw 19 engages in the head of the Rotary distributor 14, which is provided with a thread 27. Through the inner collar 24 on the knurled knob 15, the seal 23 is biased when tightening the threaded screw 19 to effect a secure seal.

The inner collar 24 on the knurled knob 15 cooperates with the stops 21 on the gun body 1. In the present embodiment, a respective stop 21 is provided at the opening position and at the closing position. The two positions include an angle of 95 degrees in the present embodiment. As a result, the adjustment is very visually perceptible.

In other conceivable embodiments, larger angles, for example between 90 and 180 degrees, but preferably always less than 360 degrees, could be provided.

As in Fig. 2 a) recognizable, the knurled knob 15 has a position indicator 20 in the form of a notch, which in the in Fig. 2 shown fully open Breitstrahlleitungsmündung 7 'points vertically upwards, while at fully closed Breitstrahlleitungsmündung 7', the position indicator 20 in the in Fig. 6 a) shown rotated position by about 95 ° clockwise.

Alternatively, instead of the indentation, an individual printed mark or a scale, for example printed on it, could be provided as a position indicator 20. Of course, the position indicator 20 could be provided instead of the knurled knob 15 on the gun body 1.

At the in Fig. 8 illustrated variant of the knurled knob 15, the position indicator 20 is formed as an integrally formed on the knurled knob 15, raised position marker 28. The position marker 28 is formed in this embodiment particularly long and extends laterally of the imaginary diameter line over the entire surface of the knurled knob 15; with the exception of the central region 29. On the gun body 1, a raised on the position marker 28, raised position marker 30 is provided. In this variant, the adjustment is particularly visually perceptible.

The structure of the distributor spindle 13 and the rotary distributor 14 will now be described with reference to Fig. 7 explained. Due to the mouth of the broad jet line 7 in the lower floor area of the Compressed air distribution cylinder 8 is a Breitstrahleinstellbereich 146 of the rotary distributor 14 adjacent to the bottom plate 16 is arranged. The wide-beam adjustment area 146 has a broad-jet closure area 146a for completely closing the round-jet line mouth 7 'and a wide-jet opening area 146b for the successive opening or closing of the wide-jet line mouth 7'.

In contrast, there is a Rundstrahleinstellbereich 147 above the Breitstrahleinstellbereichs 146 and in the vicinity of the cover plate 17, since the round jet line 6 opens in the upper region of the compressed air distribution cylinder 8. Since the round jet line opening 6 'is also offset slightly in the circumferential direction of the compressed air distribution cylinder 8 to the wide jet line opening 7', the Rundstrahleinstellbereich 147 is also correspondingly circumferentially offset from the Breitstrahleinstellbereich 146. The Rundstrahlejuststellbereich 147 has an approximately rectangular in the present embodiment Rundstrahleinstellöffnung 147a, which is offset from the wide jet closure region 146a, that with completely closed wide jet line 7 and simultaneously fully opened compressed air supply line 10, the maximum permissible pressure in the round jet line 6 and thus at the round jet 4 not exceeded becomes.

It goes without saying that the Rundstrahleinstellbereich 147 can also be designed as a slot or similar.

The in Fig. 7 left edge of the rotary distributor 14, the Rundrayseinstellöffnung 147a and also the wide jet closure portion 146a form a Druckluftzuleitungseinstellbereich and are formed so that in the in Fig. 6 shown position of the rotary distributor 14, the compressed air supply port 10 'is completely open to the compressed air distribution cylinder 8 and is covered by any of the above components of the rotary distributor 14.

In the in Fig. 2 On the other hand, both the broad-jet shutter area 146a and the one in FIG Fig. 7 left edge of the Rundstrahleeingstellbereichs 147 and the short, lying between them area 148 so far into the compressed air supply port 10 'that at fully open Rundstrahlleitungsmündung 6' and broad jet mouth 7 'of the maximum prevailing in the round jet line 6 and the wide jet line 7 pressure does not exceed the maximum permissible pressure ,

Fig. 1 and Fig. 2 show the position of the rotary distributor 14 at fully open Rundstrahlleitungsmündung 6 'and Breitstrahlleitungsmündung 7', ie maximum pressure on the round jet 4 and the wide jet nozzles 5. The rotary distributor 14 are here the. Rundstrahlleitungsmündung 6 'and Breitstrahlleitungsmündung 7' in the compressed air distribution cylinder 8 completely free. The compressed air supply port 10 ', however, is maximally covered by the Druckluftzuleitungseinstellbereich the rotary distributor 14 in order to limit the pressure in the compressed air distribution cylinder 8 to the maximum permissible pressure.

In order to reduce the supply of compressed air to the broad jet nozzle 5 and, consequently, to reduce the pressure at the wide jet line mouth 7 'in the compressed air distribution cylinder 8, the knurled knob 15 is moved from the in Fig. 2 a) in a clockwise direction at about 45 ° in the direction of Fig. 4 a) rotated position shown. This is recognizable to the user directly on the position indicator 20. This will make the in Fig. 7 shown wide-beam opening portion 146b of the Breitstrahleinstellbereichs 146 with its tapering side flanks over the wide jet port 7 'rotated. At the same time the Rundstrahleinstellbereich 147 is rotated over the Rundstrahlleitungsmündung 6 ', which thereby partially by the in Fig. 7 right leading edge of the Rundstrahleinstellbereichs 147 hidden and partially released by the Rundstrahleinstellöffnung 147a. At the same time the rotation of the rotary distributor 14, the compressed air supply port 10 'successively released, but remains at the in Fig. 4 shown still partly covered by the rotary distributor 14. Since at the same time the round jet line mouth 6 'and wide jet line mouth 7' are reduced, but the access of compressed air through the compressed air supply port 10 'is increased, set pressure conditions in the compressed air distributor 9 so that the maximum permissible pressure on and in the round jet line 6 and the wide beam line. 7 is not exceeded.

If the knurled knob 15 and thus the rotary distributor 14 then by another approximately 45 ° clockwise from the in Fig. 4 a) shown position in the in Fig. 6 a) turned position shown, the position is achieved with fully closed wide jet line mouth 7 '. How out Fig. 6 c) and Fig. 6 b) recognizable, the broad jet line mouth 7 'is then completely closed, while the Rundstrahlleitungsmündung 6' nor through a part of the Rundstrahleinstellöffnung 147a with compressed air from the now fully open Compressed air supply port 10 '( Fig. 6 c) to e) is charged. By the rotary distributor 14 and its special shape, ie the conically narrowing course of Breitstrahlöffnungsbereichs 146b, the Rundstrahlöffnungsbereichs 147a, adjoining the Rundstrahleinstellbereichs 147 and the Druckluftzuleitungseinstellbereichs it is ensured that during the entire closing of the wide jet line mouth 7 'neither on and in the round jet line. 6 still on and in the broad jet line 7 and thus at the associated nozzles (round jet 4 and wide jet 5) a predetermined maximum pressure exceeding pressure is achieved.

Alternatively, the omnidirectional orifice 6 'could be completely closed if the geometrical shape of the omnidirectional orifice 147a were selected accordingly.

In addition, either exponential or linear or degressive shutter characteristics may be achieved, depending on the shape of the wide-beam aperture region 146b.

That in the embodiment of the invention, the rotary distributor 14 and the mouth 10 'of the compressed air supply line 10 can close, is due to the above-described constructive, congruent adapted to the surfaces of the compressed air supply line 10 embodiment of the rotary distributor 14, in alternative embodiments without such adaptation, the compressed air supply line 10th accordingly not or not completely closed. However, there are no great dangers for the desired function of the paint spray gun. In any case, it is possible according to the invention to supply either the total amount of air or a reduced amount of air to the rotary distributor 14

A significant advantage over the solutions known from the prior art is that in the present invention by the radial adjustment kinematics of the rotary distributor 14, a significantly smaller adjustment angle is made possible. In the solution after the EP 0 706 832 B1 If the adjustment angle is, for example, around 410 °, the knurled knob there must therefore be rotated from the open to the closed homeal opening by more than one turn of the wool. This prevents among other things a simple position indication of the current opening of the horn air opening. In addition, with the chick with sealing pin the EP 0 706 832 B1 adjusting the correct ratio of the different openings in the compressed air manifold extremely difficult to each other, a corresponding simulation or calculation possible only with great effort. Also, a linear adjustment kinematics is not possible here and the knurled knob changes its distance to the body. If it rises undesirably far, overspray may possibly be introduced into the gun, which is not the case with the solution according to the invention.

Another advantage of the invention is that easily one-handed operation of the rotary distributor 14 is possible.

In an alternative embodiment of the distributor spindle 13, the rotary distributor can also be designed differently. For example, can be used as a rotary distributor, a hollow cylinder, have its divided in the axial direction lateral surface halves symmetrical, merging into each other round jet, wide jet and Druckluftzuleitungseinstellbereiche. In this way, the hollow cylinder could be rotated with a rotation of 180 ° from the fully open to the fully closed position of the wide jet line mouth 7 ', then by wide rotation in the same direction the wide jet line mouth 7' could then be opened again in a corresponding manner. Instead of a half division of the hollow cylinder can also be divided into quarters, which again have correspondingly symmetrical and merging round jet, wide jet and Druckluftzuleitungseinstellbereiche. It can then be changed with a rotation of 90 ° between the open and closed position of the broad jet line mouth 7 ', and indeed within a full revolution of the hollow cylinder four times. These alternatives have the advantage that no stops are necessary to prevent over-rotation of the distributor spindle in which direction whatsoever. Although the omnidirectional, wide jet and compressed air supply adjustment ranges in the alternatives are merging into one another but not symmetrical to one another, different characteristics of the compressed air distribution between the fully opened and closed position of the broad jet line opening could advantageously be made possible.

In a further alternative, a solid cylinder may be used instead of the rotary distributor 14, which has an inlet opening which serves for partially opening or closing the compressed air supply line 10, then from this inlet opening in the solid cylinder then two channels to the broad jet line mouth 7 'and the Rundstrahlleitungsmündung 6 'branch off. The channels then point at the other end Openings in the solid cylinder, which are so formed with respect to the broad jet line mouth 7 'or round jet line mouth 6', that at fully closed wide jet line mouth 7 'at the round jet line mouth 6' is still the maximum pressure allowed. Similarly, all openings in the solid cylinder are designed so that during the closing process, the maximum pressure allowed on or in the round jet line 6 or the broad jet line 7 is never exceeded.

In a further embodiment, the round jet line mouth 6 ', the wide jet line mouth 7' or the compressed air supply mouth 10 'or even several of these mouths open at the bottom of the compressed air distribution cylinder 8. In order to be able to open or close these openings arranged in the bottom, the corresponding adjustment region must then be provided with opening and closing regions in the bottom disk 16 of the distributor spindle 13. If, for example, the broad jet line mouth is located eccentrically in the bottom of the compressed air distribution cylinder 8, ie outside its central longitudinal axis, then advantageously a broad jet line opening adapted to the size of the wide jet line opening could be spirally tapered in the bottom plate 16 up to a wide jet closure area without an opening.

In a further embodiment, the compressed air distribution chamber instead of a continuous compressed air distribution cylinder 8 with a diameter preferably also be arranged axially axially spaced cylinder bores of different diameters, wherein the diameter preferably gradually decreases gradually from the opening of the compressed air distribution chamber to the ground. The distributor device is then advantageously adapted to the diameter change. Instead of a step-shaped change in diameter of the compressed air distribution chamber, the compressed air distribution chamber can advantageously also have a conical shape or have a conical region, whereby the distributor device is also advantageously adapted to this shape of the compressed air distribution chamber.

In order to make the advantages of the invention available to an already existing paint spray gun, a compressed air distributor insert can be formed from the distributor spindle 13 with rotary distributor 14, the threaded sleeve 18, the knurled knob 15 and the threaded screw 19. This compressed air distribution insert can then be used in the compressed air distribution chamber of the existing paint spray gun. This can be in the training and design of the Rotary distributor advantageous the shape of the compressed air distribution chamber are taken into account. Likewise, the other components of the compressed air distribution insert are adapted to the conditions of the existing paint spray gun. Due to the simple design of the rotary distributor, the determination of their shape and the resulting compressed air distribution in the compressed air distribution chamber can be easily determined by the shape of the existing compressed air distribution chamber. The above described in detail in describing the paint spray gun invention further advantages and refinements of the individual components of Druckluftverteilereinsatzes apply of course also for the compressed air distribution insert itself. Instead of a knurled knob, any other suitable rotary handle can be attached to the distributor spindle.

Other alternative embodiments in which the openings of the round jet line 6, the wide jet line 7 and the compressed air supply line 10 in the compressed air distribution cylinder 8 can be adjusted by rotation exclusively about the rotational axis D without axial displacement of rotary distributors, pinhole diaphragms, etc., correspond to the present invention.

LIST OF REFERENCE NUMBERS

1 Spray Gun 146 Breitstrahleinstellbereich 2 handle 146a Wide-angle closure area 3 Color nozzle head 146b Breitstrahlöffnunqsbereich 4 Round nozzle 147 Rundstrahleinstellbereich 5 Wide nozzle 147a Rundstrahleinstellöffnung 6 Omnidirectional line 148 Short range 6 ' Omnidirectional line mouth 7 Wide beam line 7 ' Wide jet pipe mouth 8th Compressed air distributor cylinder 8a ground 8b lateral surface 8c opening 9 Compressed air distribution 10 Compressed air supply 10 ' Compressed air feed line outlet 11 valve means 11a deduction 12 Compressed air supply 13 distribution spindle 14 rotary distributor 15 knurled knob 16 bottom disk 17 cover disk 18 threaded sleeve 19 screw 20 position indicator 21 Ahschlag 22 distance 23 poetry 24 Federation 25 Upper area of 14 26 Lower area of 14 27 thread 28 location marker 29 Middle area 30 mark

Claims (21)

1. A paint spray gun (1) with a compressed-air distribution chamber (8), into which a compressed-air feed line (10), a round-jet line (6) and a wide-jet line (7) open, wherein the amount of compressed air that is fed to the compressed-air distribution chamber (8), the round-jet line (6) and the wide-jet line (7) can be set by means of a setting element which is arranged in the compressed-air distribution chamber (8) and can be turned from the outside about an axis of rotation (D) extending through the compressed-air distribution chamber (8) by way of an actuating element (15), characterized in that the setting element is formed as a rotary distributor (14) which is held immovably in the axial direction of the axis of rotation (D) in the compressed-air distribution chamber (8) and can be turned about the axis of rotation (D) for opening and closing entry openings (6', 7', 10') of the round-jet line (6) and/or the wide-jet line (7) and/or the compressed-air feed line (10).
2. The paint spray gun (1) as claimed in claim 1, characterized in that the compressed-air distribution chamber is formed as a compressed-air distributor cylinder (8) with an opening (8c) and walls formed by a base (8a) and a lateral surface (8b).
3. The paint spray gun (1) as claimed in claim 2, characterized in that the rotary distributor (14) has at its end remote from and/or proximate to the rotary grip (15) a guide (16; 17) lying against the lateral surface (8b).
4. The paint spray gun (1) as claimed in claim 3, characterized in that the guide is a circular disk (16; 17) and/or a circular ring with an outside diameter adapted to the inside diameter of the compressed-air distributor cylinder (8).
5. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that the rotary distributor (14) is formed by a lateral surface portion of a cylinder around the axis of rotation (D).
6. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that the rotary distributor (14) has a wide-jet setting region (146), which can be turned about the axis of rotation (D) which lying against the walls (8a, 8b) of the compressed-air distribution chamber (8) and has a wide-jet closing region (146a), for completely closing the wide-jet line entry opening (7'), and a wide-jet opening region (146b) adjoining thereto, for successively opening the wide-jet line entry opening (7').
7. The paint spray gun (1) as claimed in claim 6, characterized in that the wide-jet opening region (146b) permits exponential or linear or degressive opening and/or closing.
8. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that the rotary distributor (14) has a round-jet setting region (147), which can be turned about the axis of rotation (D) while lying against the walls (8a, 8b) of the compressed-air distribution chamber (8), for completely or partially closing and successively opening the round-jet line entry opening (6').
9. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that the rotary distributor (14) can also close the entry opening (10') of the compressed-air feed line (10).
10. The paint spray gun (1) as claimed in claim 9, characterized in that the rotary distributor (14) has a compressed-air feed-line setting region, which can be turned about the axis of rotation (D) while lying against the walls (8b) of the compressed-air distribution chamber (8), for partially closing and successively opening the compressed-air feed-line entry opening (10').
11. The paint spray gun (1) as claimed in one of claims 6 to 10, characterized in that the round-jet entry opening (6), the wide-jet entry opening (7) and/or the compressed-air feed-line entry opening open into the lateral surface (8b) and the round-jet setting region (147), the wide-jet setting region (146) and the compressed-air feed-line setting region can be turned along on the lateral surface (8b).
12. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that at least one position indicator (20, 28, 30) for indicating the position of the rotary distributor (14) in the compressed-air distribution chamber (8) is provided.
13. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that a rotary grip (15), which is provided with at least one position indicator (20, 28) for indicating the position of the rotary distributor (14) in the compressed-air distribution chamber (8), is provided as the actuating element (15) for the rotary distributor (14).
14. The paint spray gun (1) as claimed in claim 12 or 13, characterized in that at least one position indicator (30) in the form of a raised position marking is provided on the paint spray gun (1).
15. The paint spray gun (1) as claimed in one of the preceding claims, characterized in that an actuating element (15), which has at least one stop or interacts with at least one stop (21) on the body of the paint spray gun (1), is provided for the rotary distributor (14).
16. The paint spray gun as claimed in claim 15, characterized in that a stop (21) may dictate at least the opening position and the closing position.
17. The paint spray gun (1) as claimed in claim 16, characterized in that an angle of approximately 90 degrees, preferably of 95 degrees, lies between the opening position and the closing position.
18. A compressed-air distributor insert for a paint spray gun (1) with a distributor spindle (13), which can be inserted into a compressed-air distribution chamber (8) of the paint spray gun (1) and is held rotatably therein by means of a threaded sleeve (18) that can be screwed on the paint spray gun (1), wherein an actuating element (15) is provided for actuating the distributor spindle (13), characterized in that a rotary distributor (14), which is not movable with respect to the actuating element (15) in the axial direction of the axis of rotation (D) and can be turned about the axis of rotation (D), is provided at an end of the distributor spindle (13) that can be inserted into the compressed-air distribution chamber (8).
19. The compressed-air distributor insert as claimed in claim 18, characterized in that the compressed-air distributor (14) is of a two-part form and consists of a different material in a first region (25) than in its second region (26).
20. The compressed-air distributor insert as claimed in claim 19, characterized in that one region (25) consists of metal, preferably of brass.
21. The compressed-air distributor insert as claimed in claim 19, characterized in that one region (26) consists of plastic, preferably of polyamide.

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