Treatment plant for treating workpieces, and method for treating workpieces

Abstract

The present invention relates to a treatment plant (100) for treating workpieces (102), in particular a painting plant (104) for painting vehicle bodies (106), wherein at least one access region (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) is provided which is arranged at least partially outside or inside at least one treatment region (110, 112, 114, 136, 138, 140), wherein fresh air and / or circulating air can be fed from the at least one treatment region (110, 112, 114, 136, 138, 140) to the at least one access region (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) and can be conveyed, in particular conveyed back, into the at least one treatment region.

Description

[0001] Treatment system for treating workpieces and method for treating workpieces

[0002] The present invention relates to a treatment system for treating workpieces. Such a treatment system can be intended, for example, for treating vehicle bodies. In particular, a treatment system for treating workpieces can be a painting system for painting vehicle bodies. Furthermore, the invention relates to a corresponding method for treating workpieces.

[0003] It is known from practice that action devices such as painting robots, which are usually designed as robot arms, are used in the painting areas of a treatment plant. These painting robots are typically equipped with one or more rotary atomizers, paint spray guns, or other treatment tools, which must be regularly maintained and / or cleaned to ensure high-quality treatment of the workpieces.

[0004] In the case of a rotary atomizer, for example, cleaning the bell cup or the external charging ring is necessary, especially when changing colors or after extended production periods. It may also be necessary to replace the external charging ring.

[0005] For such maintenance and / or cleaning operations, the treatment of the affected workpiece is interrupted.

[0006] In particular, the maintenance and repair of the action devices of a painting area is carried out from so-called access areas or maintenance areas, which are located in the respective painting area.

[0007] On the one hand, the associated safety technology upstream and downstream of the painting area, through which the workpieces are conveyed, is complex, primarily to avoid crushing hazards. Additional space must also be provided for a user to access the painting area to avoid endangering them. On the other hand, some of the action devices must be guided on rails to ensure accessibility via the access areas, especially during treatment. The corresponding rails are usually arranged on the side walls of the paint booth in a painting area and thus prevent direct or unobstructed view into the paint booth.

[0008] WO 2021 / 063443 and WO 2021 / 063444 already disclose a treatment system for treating workpieces, comprising a treatment area for receiving workpieces to be treated and a plurality of action devices for performing one or more actions on the workpieces to be treated. The treatment system comprises at least one access area, from which and / or at which the one or more action devices are accessible in an access state. The access area is spatially separated from the actual treatment area and is arranged stationary within the treatment chamber, preferably in a corner area of ​​the treatment chamber.

[0009] By arranging one or more access areas entirely within the treatment area, the cross-sectional area of ​​the treatment area, which runs perpendicular to the conveying direction of the workpieces, is reduced, which means additional effort in terms of safety technology.

[0010] The present invention is therefore based on the object of providing a treatment plant which is simple in design and can be used efficiently.

[0011] This object is achieved according to the invention by a treatment plant having the features according to claim 1.

[0012] The treatment plant is, in particular, a painting plant for vehicle bodies.

[0013] The treatment system comprises the following: a conveying direction along which the workpieces can be conveyed through the treatment system; at least one treatment area for receiving workpieces to be treated; one or more action devices for carrying out one or more actions on the workpieces to be treated; and at least one access area from which and / or at which the one or more action devices are accessible, wherein the at least one access area is arranged at least partially outside or inside the at least one treatment area, and wherein fresh air and / or recirculated air from the at least one treatment area can be supplied to the at least one access area and guided, in particular recirculated, into the at least one treatment area.

[0014] The invention is based on the idea that an alternative arrangement of the access areas from which the action devices are accessible can, on the one hand, reduce the number of access areas and, on the other hand, counteract a reduction in the cross-sectional area, which runs perpendicular to the conveying direction, at the level of the access areas, so that, among other things, the crushing hazard zones and the associated required safety technology can be minimized. Furthermore, an improved air guidance concept through the access areas according to the invention makes it possible, for example, to eliminate the need for separate circular ducts for supplying air to the individual access areas.

[0015] A treatment area is, for example, a processing area and / or coating area for processing and / or treating workpieces.

[0016] An action to be carried out on the workpieces to be treated is in particular a treatment action, for example a coating process and / or treatment process.

[0017] In particular, it can be provided that from the at least one access area and / or at the at least one access area, the one or more action devices are accessible to a person, for example a worker, and / or mechanically, in particular to a maintenance machine and / or setup machine.

[0018] Preferably, one or more, in particular all, action devices are arranged permanently or at least approximately permanently and / or completely or at least approximately completely within the treatment area, in particular between the two side walls of the treatment area.

[0019] The action devices are preferably not removed from the treatment area to carry out maintenance and / or setup actions.

[0020] Preferably, all action devices remain within the treatment area while treatment operations are carried out on the workpieces.

[0021] The treatment system preferably comprises a conveying device for conveying workpieces, wherein the workpieces can preferably be conveyed in a conveying direction into the treatment area, through the treatment area and / or out of the treatment area.

[0022] Preferably, at least one access area is assigned to multiple action devices. It may be advantageous if each access area is assigned to multiple action devices.

[0023] It may be advantageous if one or more action devices each have one or more action elements, in particular one or more application elements and / or handling elements.

[0024] One or more of the action elements, in particular all of the action elements, can preferably be moved partially and / or completely and / or simultaneously and / or sequentially into and / or towards one or more access areas.

[0025] It can further be provided that the at least one access area is spatially separated from the at least one treatment area.

[0026] By spatially separating the two areas, each can be provided with its own airflow. It is also advantageous if at least two, preferably exactly two, access areas are assigned to the at least one treatment area.

[0027] By means of a lateral arrangement centrally with respect to the conveying direction, preferably several, in particular all, action devices of one side of the associated treatment area can be assigned to an access area.

[0028] It is advantageous if the fresh air and / or the recirculated air can be supplied to at least one access area by means of a fan and / or a duct system.

[0029] In a further embodiment of the invention, it can be provided that the air from the at least one access area can be discharged horizontally and / or vertically.

[0030] Furthermore, it can be provided that the at least one access area comprises at least one access opening to at least one treatment area through which one or more action devices are accessible.

[0031] The access opening can be used to exchange, change or store elements of the action devices, in particular the action elements thereof.

[0032] In this description and the appended claims, the term "replacement part" refers to a replaceable or interchangeable element of the action device that is to be replaced, changed, or removed before, during, or after the treatment of the workpieces. For example, an external charging electrode of a rotary atomizer of a painting robot arm.

[0033] It can further be provided that the at least one access opening comprises a movable pane, in particular an automatically movable pane, or is designed as such.

[0034] By providing a movable pane, an air curtain device, which forms an air curtain in the area of ​​the access opening to atmospherically separate the treatment area from the access area, is no longer necessary. Alternatively or additionally, the access opening can include or be designed with a roller shutter mechanism.

[0035] It is further advantageous if the at least one access opening comprises a turntable, a drawer system or a storage table, via which replacement parts, in particular electrode rings or bell cups or even entire atomizers, can be transferred between the at least one access area and the one or more action devices of at least one treatment area.

[0036] It is advantageous if the one or more action devices are arranged in a fixed location in the respective treatment area or are movable along a guide device, in particular a rail device, within the respective treatment area.

[0037] Preferably, several, in particular all, action devices are arranged locally in the respective treatment area, whereby not only the guide devices can be saved, but also the view into the treatment area is maintained.

[0038] In a further embodiment of the invention, it can be provided that the at least one treatment area has a walkable floor, in particular a grating floor, above and / or below which the air from the at least one access area can be guided, in particular recirculated, into the at least one treatment area.

[0039] It can further be provided that the at least one access area has a door through which the at least one access area can be entered.

[0040] A worker can therefore enter the access area through the door to service, maintain, repair, clean, or similarly perform tasks on the assigned action devices. If only fresh air is supplied, the worker can enter the access area without protective equipment, whereas protective equipment is required if recirculated air is supplied from one of the treatment areas.

[0041] It is also advantageous if the fresh air and / or the recirculated air can be supplied above the door via a supply area.

[0042] It is advantageous if the supply area comprises a plenum for homogeneous air introduction into the access area and / or a filter device, in particular a filter ceiling, for filtering the supplied fresh air and / or recirculated air.

[0043] In a further embodiment of the invention, it can be provided that the at least one access area is not accessible and has at least one exchange opening for removing replacement parts from the at least one access area and / or introducing them into the at least one access area.

[0044] Furthermore, it can be provided that the treatment system comprises at least two treatment areas, each comprising one or more action devices and which are arranged one behind the other and / or parallel to each other with respect to the conveying direction, wherein at least one access area is assigned to at least two treatment areas.

[0045] In other words, the treatment system can comprise two or more treatment lines, each comprising treatment areas arranged one behind the other in the conveying direction. The treatment lines are preferably aligned parallel to each other, and access areas can be arranged between the lines, whereby action devices of both lines can be assigned to an access area arranged between the lines.

[0046] The object of the present invention is further achieved by a method for treating workpieces, in particular for painting vehicle bodies.

[0047] The method according to the invention comprises the following steps:

[0048] Supplying fresh air and / or recirculated air from a treatment area to an access area; opening an access opening in the access area;

[0049] Maintenance of one or more action devices of the treatment area via the access opening of the access area

[0050] Closing the access opening of the access area; and

[0051] Leading, in particular returning, the air from the access area to the treatment area.

[0052] It can further be provided that the access opening of the access area comprises a turntable, a drawer system or a storage table, via which replacement parts of the one or more action devices are changed during maintenance.

[0053] It is also advantageous if the air is discharged horizontally and / or vertically from the access area and supplied to the treatment area above and / or below a walkable floor, in particular a grating floor, of the treatment area.

[0054] The method preferably has one or more of the features and / or advantages described in connection with the treatment plant. Furthermore, the treatment plant preferably has one or more of the features and / or advantages described in connection with the method.

[0055] Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

[0056] The figures show:

[0057] Fig. 1 is a schematic representation of a first embodiment of a treatment plant according to the invention;

[0058] Fig. 2 is a schematic representation of a second embodiment of a treatment plant according to the invention; and

[0059] Fig. 3 is a schematic representation of an access area of ​​the prior art; Fig. 4 is a schematic representation of a first embodiment of an access area according to the invention;

[0060] Fig. 5 is a schematic representation of a second embodiment of an access area according to the invention; and

[0061] Fig. 6 is a schematic representation of a third embodiment of an access area according to the invention.

[0062] Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

[0063] A first embodiment of a treatment system, designated as a whole by 100, shown in Fig. 1, is used to treat workpieces 102.

[0064] The treatment system 100 is in particular a painting system 104 for painting vehicle bodies 106.

[0065] The workpieces 102 are conveyed in the treatment system 100 along a conveying direction 108.

[0066] The treatment plant 100 in the first embodiment in Fig. 1 comprises three treatment areas 110, 112, 114, which are arranged one behind the other in the conveying direction 108.

[0067] In the treatment area 112 arranged centrally in Fig. 1, first action devices 116 and second action devices 118 are arranged laterally of the workpiece 102, wherein the first and second action devices 116, 118 are each arranged symmetrically to the conveying direction 108.

[0068] The first and second action devices 116, 1118 are, in particular, painting robots in the form of robot arms, preferably six-axis robot arms. Furthermore, the treatment system 100 comprises at least one of the possible access areas 120 to 134, from which and / or at which one or more action devices 116, 118 are accessible for maintenance, servicing, and / or repair.

[0069] Fig. 1 illustrates several possible configurations for an access area, which are briefly presented below, with reference primarily to the treatment area 112 as an example. The possible configurations are accordingly transferable to any treatment area of ​​the treatment system 100 and apply to them equally.

[0070] The arrangement of an access area 120 corresponds to the arrangement previously known from the prior art, ie, completely within the treatment area 110 in one of the four corners of the area, whereby the cross-sectional area of ​​the treatment area 110, which runs transversely to the conveying direction 108, is correspondingly reduced there. The cross-sectional area reduced by the transverse dimension of the access area 120 results, among other things, in an increased number of crushing hazard zones, which is why additional safety technology such as light barriers or swing doors must be provided.

[0071] An access area 122 may be located entirely outside the treatment area 112 and centrally between the action devices 116, 118 of the corresponding side of the treatment area 112.

[0072] An access area 124 may be arranged entirely outside the treatment area 112 and at least partially outside the treatment area 114; with respect to the latter, in particular in the area of ​​one of the corners adjacent to the treatment area 112.

[0073] An access area 126 may be arranged partially outside the treatment area 112 between the action devices 116, 118 of one side of the treatment area 112.

[0074] In particular, the arrangement of the access areas 122 and 126 makes it possible for only two access areas to be required per treatment area, whereas in the prior art, four access areas 120 were previously arranged in the four corners of the respective treatment area, which was accompanied by a considerable reduction in the cross-sectional area in the inlet and outlet area of ​​the respective treatment area.

[0075] An arrangement outside or at least partially outside the respective treatment area, such as in the case of the access areas 122, 124, 126, accordingly results in a significantly small or even no reduction in the associated cross-sectional area of ​​the respective treatment area.

[0076] An access area 128 may be arranged between the treatment areas 110 and 112 or alternatively between the treatment areas 112 and 114; it is arranged entirely within the respective treatment area at the corresponding transition.

[0077] As a result, action devices 116, 118 from the treatment areas 110, 112 can be assigned to the access area 128 in Fig. 1.

[0078] An access area 130 can be arranged at any location within the treatment area 112. Such an arrangement is preferably coordinated with the conveying device (not shown) that conveys the workpieces 102 through the treatment system 100, ie, in particular through the treatment areas 110, 112, 114, and the arrangement of the action devices 116, 118.

[0079] An access area 132 can be arranged outside between two treatment areas, ie at the transition between them.

[0080] As a result, action devices 116, 118 from the treatment areas 110, 112 can be assigned to the access area 132 in Fig. 1.

[0081] An access area 134 can be arranged at the transition between two treatment areas in such a way that it is arranged at least approximately equally in the treatment areas and outside them.

[0082] As a result, action devices 116, 118 from the treatment areas 112, 114 can be assigned to the access area 134 in Fig. 1. The access areas 122, 124, 126 are preferred arrangement options for access areas of a treatment facility to be newly constructed or set up, whereas the access areas 120, 128, 130 are arrangement options for access areas of an existing facility.

[0083] The action devices 116, 118 are either arranged in a fixed location within the respective treatment area or are movable along a guide device (not shown), such as a rail device, preferably linearly horizontally and / or vertically movable.

[0084] Fig. 2 shows a second embodiment of a treatment system 100 according to the invention, in which a second treatment line comprises the treatment areas 136, 138, 140 arranged one behind the other in the conveying direction 108. The second treatment line is arranged parallel to the first treatment line, which comprises the treatment areas 110, 112, 114.

[0085] The parallel, adjacent treatment areas 112, 138 shown in Fig. 2 are preferably equipped identically to the action devices 116, 118.

[0086] Fig. 2 shows three further possibilities for arranging access areas.

[0087] An access area 142 may be arranged between two parallel, adjacent treatment areas, such as areas 112, 138, and preferably extends at least partially into them.

[0088] As a result, action devices 116, 118 from the treatment areas 112, 138 can be assigned to the access area 142 in Fig. 2.

[0089] An access area 144 can be arranged centrally between two parallel, adjacent treatment areas, such as areas 112, 138, with respect to the conveying direction 108, and preferably extends at least partially into them. Furthermore, the access area is preferably arranged centrally between the action devices 116, 118 of the affected area sides. This allows action devices 116, 118 from the treatment areas 112, 138 to be assigned to the access area 144 in Fig. 2.

[0090] An access area 146 can be arranged between four adjacent treatment areas of the parallel treatment lines, ie on the adjacent transitions of two treatment areas of the two treatment lines arranged one behind the other, and preferably projects at least partially into them.

[0091] As a result, action devices 116, 118 from the treatment areas 112, 114, 138, 140 can be assigned to the access area 146 in Fig. 2.

[0092] The possible access areas 120, 122, 124, 126, 128, 130, 132, 134, 142, 144 and 146 are preferably spatially separated from the affected treatment areas.

[0093] It should be understood that with a central arrangement of the access areas, as with the access areas 122, 126, 144 in the first and second embodiments in Figs. 1 and 2, the action devices 116, 118 of a complete side of the affected treatment area or those of the two affected, adjacent treatment area sides can be assigned to the centrally arranged access area.

[0094] Furthermore, it should be understood that the different access areas shown can be combined with one another, so that the available installation space of the treatment system 100 can be taken into account when arranging the access areas required for each treatment area.

[0095] For example, in the first embodiment in Fig. 1 for the maintenance, servicing and repair of the action devices 116, 118 of the

[0096] Treatment area 112, an access area 122 can be provided which is arranged to the right of the workpiece 102 outside the treatment area 112 with respect to the conveying direction 108 (i.e. above the area 112 with respect to Fig. 1), to which the action devices 116, 118 arranged at the top in Fig. 1, i.e. to the right of the workpiece 102 with respect to the conveying direction 108, are assigned. In addition, two access areas 134 can be provided, the first of which is arranged in the transition area between the treatment areas 110, 112 and the second, as shown in Fig. 1, is arranged in the area of ​​the transition between the treatment areas 112, 114, wherein logically both access areas are arranged to the left of the workpiece 102 with respect to the conveying direction 108.

[0097] Accordingly, the first access area 134 is assigned the front action devices 116, 118 in the conveying direction 108, ie the left-hand devices on the lower side of the area 112 in Fig. 1, and the second access area is assigned the rear action devices 116, 118 in the conveying direction 108.

[0098] In addition, action devices 116, 118 or the like can be assigned to the first access area 134 on the left side of the treatment area 110 with respect to the conveying direction 108, and action devices 116, 118 or the like can be assigned to the second access area 134 on the left side of the treatment area 114 with respect to the conveying direction 108.

[0099] Thus, all action devices 116, 118 of the treatment area 112 in the example described are assigned to only three access areas.

[0100] Analogously, for example, all action devices 116, 118 in Fig. 2 of the treatment areas 112, 138 can be assigned to two access areas 122, of which, with reference to Fig. 2, one is arranged above area 138 and one below area 112, and to an access area 144 which is arranged as shown in Fig. 2, whereby only three access areas are required for all action devices 116, 118 of the two areas 112, 138, which together - compared to the prior art - reduce the affected cross-sectional area of ​​the areas 112, 138 significantly less.

[0101] In Fig. 3, an access area 148 is shown in a schematic side view, which corresponds to the prior art and which is arranged entirely within a treatment area.

[0102] In Fig. 3, the access area 148 shown in the prior art is arranged, by way of example, in the treatment area 112 of Fig. 1 or 2. In the following Figs. 4 to 6, it is also assumed that the access area shown in each case is arranged in or at the treatment area 112.

[0103] The illustrated access area 148 comprises a door 150 through which the access area can be entered by a user.

[0104] Above the door 150, the access area 148 comprises a supply area 152 in which a fan (not shown) is arranged, which supplies a circular duct 154 and a circular duct 156 with fresh air.

[0105] The circular duct 154 supplies fresh air to the access area 148, whereas the circular duct 156 supplies an air curtain device 158 with fresh air.

[0106] The circular ducts 154, 156 each have a throttle valve by means of which the respective fresh air supply can be controlled and / or regulated.

[0107] The access area 148 further comprises an access opening 160 through which the action devices 116, 118 of the treatment area 112 adjacent to the right thereof are accessible.

[0108] A storage table can be arranged in the area of ​​the access opening 160 or the access opening 160 can comprise a storage table via which replacement parts of the action devices 116, 118 can be replaced, maintained, repaired or cleaned.

[0109] By means of the air curtain device 158, a fresh air curtain is formed in front of the access opening 160, which atmospherically separates the circulating air in the treatment area 112 from the air in the access area 148.

[0110] The air from the access area 148 is guided vertically out of the access area 148 via an exhaust air duct 162 and, for example, fed back to the treatment area 112 below a grating floor 164 to be mixed with the circulating air of the treatment area 112. Fig. 4 shows a first embodiment of an access area according to the invention in a schematic side view, which is also accessible via a door 150 and has a modified air duct.

[0111] The access area shown in Fig. 4 is preferably the access area 122 shown in Fig. 1, which is arranged at least approximately completely outside the treatment area 112.

[0112] The following explanations can nevertheless be applied analogously to the other access areas arranged at least partially outside one or more treatment areas, which were previously described in connection with Figs. 1 and 2.

[0113] The access area 122 is spatially separated from the treatment area 112 by a side wall 166, which is bounded vertically at the bottom by the grating floor 164 and at the top by a ceiling 168.

[0114] Fresh air and / or recirculated air from the treatment area 112 is supplied to the supply area 152 via a fan (not shown) and / or a duct system (not shown).

[0115] The supply area 152 of the access area 122 has a plenum 170, whereby the supplied air 172 can be distributed homogeneously and then flows vertically through the access area 122 through an optional filter ceiling 174 of the supply area 152.

[0116] The access opening 160 comprises a movable window, preferably an automatic movable window.

[0117] The exhaust air from the access area 122 is discharged horizontally from the access area 122 via an exhaust air duct 176 and / or an exhaust air duct 178 and is returned to the treatment area 112 above or below the level of the grating floor 164 and mixed with the recirculated air there.

[0118] Such an access area 122 is particularly suitable for new treatment systems 100. By means of such a modified air flow, several access areas 122 or comparable with a fan can be supplied with air.

[0119] In Fig. 5, a second embodiment of an access area according to the invention is shown in a schematic side view, which is also accessible via a door 150 and has a modified air duct.

[0120] The access area shown in Fig. 5 is preferably the access area 130 shown in Fig. 1, which is arranged at least approximately completely within the treatment area 112.

[0121] The following explanations can nevertheless be applied analogously to the other access areas arranged inside a treatment area, which were previously described in connection with Figs. 1 and 2.

[0122] The supply area 152 of the access area 130 shown is open at the top, so that circulating air, which flows in particular vertically through the treatment area 112, can also flow through the access area 130.

[0123] The exhaust air duct 162 here guides the air of the access area 130 vertically out of it and preferably from below the grating floor 164 back into the treatment area 112.

[0124] The use of such an access area 130 is particularly suitable for existing treatment systems 100 which already have a fresh air and exhaust air concept.

[0125] In Fig. 6, a third embodiment of an access area according to the invention is shown in a schematic side view, which is not accessible.

[0126] The access area shown in Fig. 5 is preferably the access area 122 shown in Fig. 1, which is arranged at least partially outside the treatment area 112. The following explanations can nevertheless be applied analogously to the other access areas, which are partially arranged outside one or more treatment areas and which were previously described in connection with Figs. 1 and 2.

[0127] The access area 122 in Fig. 6 is variably adjustable in its height 180 above the level of the grating floor 164.

[0128] Three exemplary air supplies 182 for fresh air and / or recirculated air from one or more treatment areas are shown, with an air supply 182 from above into the access area 122 being preferred.

[0129] The access opening 160 further comprises a turntable, a drawer system or a storage table, via which, for example, replacement parts of the action devices 116, 118 of the treatment area 112 can be transferred between the non-accessible access area 122 and the corresponding action device 116, 118.

[0130] The non-accessible access area 122 in Fig. 6 also has a change opening 184, with various possible positions for such a change opening being indicated in Fig. 6.

[0131] The replacement parts or the like can be removed from the access area 122 via the exchange opening 184 or new parts can be inserted into the access area 122 so that they can be transferred to the action devices 116, 118 via the access opening 160.

[0132] The exhaust air from the non-accessible access area 122 in Fig. 6 can be discharged horizontally or vertically via one or more exhaust air ducts 186 and returned to the treatment area 112 above and / or below the grid floor 164. List of reference symbols

[0133] Treatment plant

[0134] Workpieces

[0135] Painting system

[0136] Vehicle bodies

[0137] Conveying direction

[0138] Treatment area

[0139] Treatment area

[0140] Treatment area

[0141] Action device

[0142] Action device

[0143] Access area

[0144] Access area

[0145] Access area

[0146] Access area

[0147] Access area

[0148] Access area

[0149] Access area

[0150] Access area

[0151] Treatment area

[0152] Treatment area

[0153] Treatment area

[0154] Access area

[0155] Access area

[0156] Access area

[0157] Access scope of the state of the art

[0158] door

[0159] Feeding area

[0160] Round canal

[0161] Round canal

[0162] Air curtain device

[0163] Access opening

[0164] Exhaust air duct Grating floor Side wall Ceiling Plenum Supplied air Filter ceiling Exhaust air duct

[0165] Exhaust air duct

[0166] Height of the access area Air supply Change opening Exhaust air duct

Claims

Patent claims Treatment system (100) for treating workpieces (102), in particular a painting system (104) for painting vehicle bodies (106), comprising: a conveying direction (108) along which the workpieces (102) can be conveyed through the treatment system (100); at least one treatment area (110, 112, 114, 136, 138, 140) for receiving workpieces (102) to be treated; one or more action devices (116, 118) for carrying out one or more actions on the workpieces (102) to be treated; and at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) from which and / or at which the one or more action devices (116, 118) are accessible, wherein the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) is arranged at least partially outside or inside the at least one treatment area (110, 112, 114, 136, 138, 140),and wherein fresh air and / or recirculated air from the at least one treatment area (110, 112, 114, 136, 138, 140) can be supplied to the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) and preferably can be guided, in particular recirculated, into the at least one treatment area. Treatment system (100) according to claim 1, characterized in that the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) is spatially separated from the at least one treatment area (110, 112, 114, 136, 138, 140). Treatment system (100) according to claim 1 or 2, characterized in that at least two, preferably exactly two, access areas (122, 126, 144) are assigned to the at least one treatment area (110, 112, 114, 136, 138, 140). Treatment system (100) according to one of claims 1 to 3, characterized in that the fresh air and / or the recirculated air are circulated by means of a fan, and / or a duct system to which at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) can be fed. Treatment plant (100) according to one of claims 1 to 4, characterized in that the air from the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) can be discharged horizontally and / or vertically. Treatment system (100) according to one of claims 1 to 5, characterized in that the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) comprises at least one access opening (160) to at least one treatment area (110, 112, 114, 136, 138, 140), through which one or more action devices (116, 118) are accessible. Treatment system (100) according to claim 6, characterized in that the at least one access opening (160) comprises a movable disc, in particular an automatically movable disc, or is designed as such.Treatment system (100) according to claim 6 or 7, characterized in that the at least one access opening (160) comprises a turntable, a drawer system or a storage table, via which replacement parts, in particular electrode rings, can be transferred between the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) and the one or more action devices (116, 118) of at least one treatment area (110, 112, 114, 136, 138, 140). Treatment system (100) according to one of claims 1 to 8, characterized in that the one or more action devices (116, 118) are arranged in a fixed location in the respective treatment area (110, 112, 114, 136, 138, 140) or are movable along a guide device, in particular a rail device, within the respective treatment area (110, 112, 114, 136, 138, 140).Treatment plant (100) according to one of claims 1 to 9, characterized in that the at least one treatment area (110, 112, 114,. 136, 138, 140) has a walkable floor, in particular a grating floor (164), above and / or below which the air from the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) can be guided into the at least one treatment area (110, 112, 114, 136, 138, 140). Treatment system (100) according to one of claims 1 to 10, characterized in that the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) has a door (150) through which the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) can be entered. Treatment system (100) according to claim 11, characterized in that the fresh air and / or the recirculated air can be supplied above the door (150) via a supply area (152).Treatment plant (100) according to claim 12, characterized in that the supply area (152) comprises a plenum (170) for homogeneous air introduction into the access area (122, 124, 126, 132, 134, 142, 144, 146) and / or a filter device, in particular a filter ceiling (174), for filtering the supplied fresh air and / or recirculated air. Treatment plant (100) according to one of claims 1 to 10, characterized in that the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) is not accessible and has at least one exchange opening (184) for removing exchange parts from the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) and / or introducing them into the at least one access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146).Treatment plant (100) according to one of claims 1 to 14, characterized in that the treatment plant (100) comprises at least two treatment areas (110, 112, 114, 136, 138, 140), each comprising one or more action devices (116, 118) and which are arranged one behind the other and / or parallel to one another with respect to the conveying direction (108). wherein at least one access area (142, 144, 146) is assigned to at least two treatment areas (110, 112, 114, 136, 138, 140). A method for treating workpieces (102), in particular for painting vehicle bodies (106), the method comprising the following steps: Supplying fresh air and / or recirculated air from a treatment area (110, 112, 114, 136, 138, 140) to an access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146); Opening an access opening (160) of the access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146); Maintaining one or more action devices (116, 118) of the treatment area (110, 112, 114, 136, 138, 140) via the access opening (160) of the access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) Closing the access opening (160) of the access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146); and - guiding the air from the access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146), in particular, into the treatment area (110, 112, 114, 136, 138, 140). The method according to claim 16, characterized in that the access opening (160) of the access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) comprises a turntable, a drawer system, or a storage table, via which replacement parts of the one or more action devices (116, 118) are exchanged during maintenance. Method according to claim 16 or 17, characterized in that the air is discharged horizontally and / or vertically from the access area (120, 122, 124, 126, 128, 130, 132, 134, 142, 144, 146) and is supplied to the treatment area above and / or below a walkable floor, in particular a grating floor (164), of the treatment area (110, 112, 114, 136, 138, 140).

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