DE102007063061A1 - Dip treatment system i.e. cataphoretic dip painting system, for vehicle body, has transport trolley with carriage, where pivot pin defining rotation axis is supported at carriage such that total motion sequence for object is achieved - Google Patents

Abstract

The invention relates to a dip treatment plant, in particular an electrophoretic dip painting plant (1), which has, in a known manner, at least one dip tank (2) which can be filled with a treatment liquid. A conveyor system (4) leads the articles to be painted (3) to the dip tank (2), into the interior of the dip tank (2), out of the dip tank (2) and away from it. It comprises at least one trolley (5) on which a vertically movable carriage (21) is arranged. At this a rotational axis defining component (24) is mounted, which carries a fastening device (29) for the object to be treated (3). In this way, a movement sequence for the object (3) can be achieved, which is a superposition of a horizontal linear movement, a vertical linear movement and a rotational movement about the axis of rotation.

Description

• a) mindestens einem Tauchbecken, welches mit einer Behandlungsflüssigkeit füllbar ist, in welche die zu behandelnden Gegenstände, insbesondere Fahrzeugkarosserien, eingetaucht werden können;
• b) einem Fördersystem, welches die zu behandelnden Gegenstände an das Tauchbecken heran, in den Innenraum des Tauchbeckens hinein, aus dem Tauchbecken heraus und von diesem wegbewegen kann und welches mindestens einen Transportwagen umfasst, der eine um eine Drehachse verdrehbare Befestigungseinrichtung aufweist, an welcher mindestens ein Gegenstand befestigbar ist.

The invention relates to a dip treatment plant with

• a) at least one dip tank, which can be filled with a treatment liquid into which the objects to be treated, in particular vehicle bodies, can be immersed;
• b) a conveyor system which can approach the objects to be treated to the plunge pool, into the interior of the dip tank, out of the plunge pool and away from this and which comprises at least one trolley having a rotatable about an axis fastening device to which at least an object is attachable.

Such a dip treatment plant in the special form of an electrophoretic dip painting is from the DE 101 03 837 B4 known. Here, each trolley comprises at least one swivel arm, which is pivotable at one end about a first axis of rotation traveling with the trolley and at the other end via a second axis of rotation carries the fastening device to which the object to be painted is attached. The movement with which the vehicle body dives here in the dip tank, can be understood as a superposition of two rotational movements about the two said axes of rotation and a translational linear movement in the horizontal direction. This known Tauchlackieranlage has extremely large variability in the achievable motion kinematics and high flexibility. This must all be bought with a certain amount of equipment, since the various, the fastening device and thus the object to be painted bearing components are exposed to relatively high loads.

An older Tauchlackieranlage is in the DE 196 41 048 C2 described. In this, the conveyor is designed so that the objects to be treated are immersed under superimposition of a pure translational motion and a pure rotational movement about an axis oriented perpendicular to the transport direction in the baths and lifted out of these again. The axis of rotation must be relatively far outside the contour of the vehicle body and thus far from the center of gravity. For objects to be painted, which have a considerable weight, very complex mounting racks are required here, since large forces arise. In addition, only a single kinematics when entering and exiting the objects is possible.

task The present invention is a dip treatment plant of initially designed type so that while maintaining the greatest possible variability of Motion kinematics and flexibility of the equipment is reduced.

• c) der Transportwagen einen vertikal verfahrbaren Schlitten umfasst, an dem das die Drehachse definierende Bauteil gelagert ist, derart, dass insgesamt für den mindestens einen Gegenstand ein Bewegungsablauf erzielbar ist, der eine Überlagerung aus einer horizontalen Linearbewegung, einer vertikalen Linearbewe gung und einer Drehbewegung um die Drehachse ist.

This object is achieved in that

• c) the trolley comprises a vertically movable carriage, on which the axis of rotation defining member is mounted, such that overall for the at least one object a movement can be achieved, the supply of a horizontal linear movement, a vertical Linearbewe movement and a rotational movement to the axis of rotation is.

According to the invention, therefore, not two rotational movements and a linear translational movement as in the aforementioned DE 101 03 837 B4 superimposed, but two perpendicular to each other directed linear movements and a single rotational movement. This has the advantage that there are virtually no elements subjected to bending; the structures carrying the vertically movable carriage, as well as the vertically movable carriage itself, are essentially only subjected to tensile stresses under their own weight as well as the weight of the object to be painted. The axis of rotation can be placed so that it passes through the center of gravity of the object to be painted or at least in its vicinity, so that the rotational movement about the axis of rotation can be done with low torques.

The inventive concept does not mean that always all movements of the object from an overlay must be composed of all degrees of freedom of movement. It suffices if the device has the option offers to use all three degrees of freedom of movement simultaneously.

• a) einen an einer Antriebsschiene motorisch verfahrbaren Antriebswagen;
• b) einen an den Antriebswagen angekoppelten Tragwagen, an dem der Schlitten befestigt ist.

Advantageously, each transport cart comprises:

• a) a motorized on a drive rail drive carriage;
• b) a coupled to the drive car wagon to which the carriage is attached.

By This configuration makes it possible to drive carriages and drive rails, as used in other applications are known. It can thereby all already used there Use technologies and control methods that are tried and tested and proven.

This especially applies if the drive rail and the drive carriage in the manner of a conventional electric overhead conveyor are formed.

Of the Tragwagen may have a guide frame, the at least a guide rail extending in the direction of movement is guided. In this way, the dolly is against stabilizes unwanted movements. The guide rail can be a smaller or larger part of the weight of the carriage and the object attached thereto.

at a particularly preferred embodiment of the invention the drive carriage has at least one motor-rotatable winding roller auf, on which at least one flexible traction means on or from this is unwound, the lower end with the vertically movable Carriage is connected. This is a particularly simple way to move the carriage vertically.

alternative can also be the wagon on a non-vertically moving part having the motor rotatable winding roll.

When flexible traction means come in particular tapes or Chains in question. The latter can be designed that they stiffen under pressure, so that they transmit compressive forces can. Then, if necessary, the attached Subject also actively pressed under the liquid level if he otherwise floats on the liquid would. Corresponding chains are commercially available.

Of the Motor, with which the component defining the axis of rotation rotatable is preferably arranged on the carriage and together vertically movable with this. The geometric relative arrangement of rotary motor and axis of rotation remains during vertical movements of the carriage so unchanged, what the torque transmission facilitated.

If the wagon opposite the drive carriage to a substantially vertical axis is rotatable, the dolly can on the way back from the exit of the dip painting shop, where the treated objects be taken to the entrance, where the objects to be treated be placed in a position in which Requires less space perpendicular to the direction of movement becomes.

there can along the return path of the trolley from the exit to the entrance of the dipping treatment plant at least one Guide rail run, which provided with a wagon on the Leadership member works together. This guide device need only take in a few forces that are sufficient an uncontrolled oscillation of the carrier opposite the Drive carriage to avoid.

embodiments The invention will be described below with reference to the drawing explains; show it:

1 in side view a section of a cataphoretic dip painting system for vehicle bodies;

2 to 8th perspectively different phases when immersing a vehicle body in the dip tank of the cataphoretic Tauchlackieranlage of 1 ;

9 the cataphoretic dip painting plant of 1 , but equipped with holding cages for small items to be painted;

10 in a side view, similar to the 1 a second embodiment of a cataphoretic Tauchparackieranlage for vehicle bodies;

11 to 17 perspectively different phases when immersing a vehicle body in the dip tank of the cataphoretic Tauchlackieranlage of 10 ;

18 in perspective, a trolley, as he used to transport the objects to be painted in the Tauchlackieranlage the 10 to 17 is used during the return operation from the output of the system to its input;

19 the Tauchlackieranlage the 10 to 18 , but equipped with holding baskets for small items to be painted;

20 the Tauchlackieranlage the 1 , but with a different kinematics in the passage of the vehicle bodies.

First, it will open 1 Referenced. The illustrated here and in total by the reference numeral 1 characterized cataphoretic dip painting is a special example of a dip treatment plant. It includes a plunge pool 2 , which is filled in a known manner with liquid paint to a certain level. In an electric field, which is between the objects to be painted, in the illustrated embodiment, vehicle bodies 3 , and anodes, along the path of movement of the vehicle bodies 3 arranged and not shown for reasons of clarity, the color particles migrate to the vehicle bodies 3 to and are deposited at this. Details of this process are well known and will not be explained here.

The vehicle bodies 3 be with help a conveyor system 4 through the plant and in particular through the plunge pool 2 and the paint contained therein. This conveyor system 4 includes a variety of trolleys 5 , which in turn is a drive car 6 and a holding car coupled thereto 7 exhibit. Approximately in the middle above the plunge pool 2 extends a drive rail 41 with an I-profile, as used in conventional overhead monorail systems. Slightly below the drive rail 41 Parallel to this run two guide rails 8th especially in the 2 to 8th are clearly recognizable.

At the drive car 6 is in principle a construction that is familiar from conventional electric monorail systems. Each of these drive cars 6 has a forward leading in the direction of travel chassis 9 , in technical language called "precursor", as well as a lagging in the direction of motion another chassis 10 , which is called in the jargon "Nachläufer". precursor 9 and followers 10 are in known manner with guide and support rollers (not shown) equipped on different surfaces of the I-shaped profile of the drive rail 7 roll. At least one of the roles of the precursor 9 serves as a drive roller and is for this purpose by an electric motor 11 rotatable.

precursor 9 and followers 10 every drive car 6 are through a connection structure 12 connected with each other. This in turn carries a control device in a known manner 13 , which with the central control of Tauchlackieranlage 1 and if necessary with the control directions 13 the other in the Tauchlackieranlage 1 existing drive carriages 6 can communicate. In this way is a largely independent movement of the various dolly 5 possible.

Between the precursor 9 and the trailer 10 every drive car 6 extends a wave 14 that only in the 2 to 8th can be seen and on the two bobbins 15 are rotationally fixed. The wave 14 is at its opposite ends in the connection structure 12 in the area of the precursor 9 and the Nachläufers 10 stored and leaves by a winding motor 16 set in rotation again only in the 2 to 8th represented and in the range of the precursor 9 at the connection structure 12 is attached. By turning the shaft 14 with the help of the winding motor 16 can be two straps 17 on the bobbins 15 winding up or winding up, whose function will be discussed below.

Every wagon 7 includes a guide frame 18 in the form of a rectangle whose longer side is perpendicular to the direction of movement. The narrow sides of the guide frame 18 carry guide rollers at their opposite ends 19 , which on the inner surfaces of the C-shaped profile of the two guide rails 8th expire.

Approximately in the middle region of these two narrow sides is in each case a vertically downwardly extending guide rail 20 attached. On these guide rails 20 is a sled 21 vertically movably guided. The sled 21 is also substantially rectangular; its two vertical sides are made of hollow guide profiles 22 formed at its upper ends by a crossbar 45 connected to each other.

At the lower ends of the two guide profiles 22 is each a pivot 24 mounted, which are coaxially aligned and define in this way a rotation axis.

At the bottom of the upper crossbeam 45 of the sled 21 , approximately in the middle below the drive rail 7 , is a short side member 25 attached, which is visible in the figures and to which the lower ends of the straps 17 are fixed. The side member 25 also carries a geared motor 26 , whose output shaft via two transmission devices 27 with the outer ends of the pivot 24 connected is. The transmission devices 27 each comprise a propeller shaft extending from the geared motor 26 to one of the two hollow guide profiles 22 extends and is coupled there to a drive mechanism, not shown, within the hollow Führungsprofiles 22 runs down and at its lower end with the rotary shaft 24 is coupled. By actuating the geared motor 26 can be in this way the pivot 24 twist in both directions.

On the outside of the guide profiles 22 In each case rollers are mounted, which from the inside into the guide rails 20 engage, allowing the guide carriage 21 low friction between the guide rails 20 is vertically movable.

Every drive car 6 is with the accompanying wagon 7 through a diagonal drive rod 28 connected at its lower end hinged with a crossbeam 23 of the guide frame 18 and at its upper end with the connection structure 12 of the drive carriage 6 in the area of the precursor 9 is hinged.

At the pivot 24 is each about two tabs 42 a total with the reference numeral 29 provided fastening device, at which in a known manner to be painted vehicle body 3 can be releasably attached. The dimensions of the tabs 42 are doing so that the common axis of the pivot 24 to at least approximately by the center of gravity of the vehicle body 3 proceeds.

The operation of the cataphoretic Tauchlackieranlage described above 1 is the following:
The vehicle bodies to be painted 3 be in 1 from the left in a substantially horizontal orientation (arrow 60 ) supplied from a pretreatment station, in which the vehicle bodies 3 be prepared in a known manner by cleaning, degreasing, etc. on the painting. The sled 21 is moved in its uppermost position, in which the straps 17 according to the bobbins 15 are wound on. The corresponding position is in perspective 2 to recognize. The drive car 6 of the corresponding transport vehicle 5 is with the help of the electric motor 11 along the drive rail 41 on the plunge pool 2 fed, the associated wagon 7 with the help of the drive rod 28 is retraced. The guide rollers roll 19 of the trolley 7 on the corresponding surfaces of the guide rails 8th from.

What proportion of the weight of the trolley 7 and the vehicle body attached thereto 3 over the straps 17 and ultimately from the drive rail 41 on the one hand and on the guide rails 8th On the other hand, can be decided on the basis of convenience. Basically, it is both denbkar, this weight exclusively on the drive rail 41 as well as exclusively on the guide rails 8th as well as mixed over the drive rail 41 and over the guide rails 8th take.

When the dolly 5 the front wall of the diving basin located on the entrance side 2 approaching, the sledge becomes 21 on which the vehicle body 3 is progressively lowered by using the winding motor 16 the straps 17 according to the bobbins 15 be unwound. Once the front of the vehicle body 3 over the front wall of the diving basin 2 out into the interior of the diving basin 2 projects, simultaneously with the help of the geared motor 26 the pivots 24 and thus the whole fastening device 29 including vehicle body 3 twisted. In this area, so the total movement of the vehicle body 3 as superposition of three movements to understand, namely a horizontal linear movement (arrow 60 ) along the rails 7 . 8th , a vertical linear movement along the guide rails 20 and a rotational movement in the view of 1 clockwise about the axis of the pivot 24 , This "wraps" the vehicle body 3 on the input side end wall of the dip tank 2 , The corresponding position is in perspective 3 shown.

With continued lowering of the carriage 21 and continued rotation of the vehicle body 3 about the axis of the pivot 24 Finally, a position is reached in which the vehicle body 3 is essentially vertical, as in 4 is shown. This is the vehicle body 3 still relatively close to the input-side end wall of the dip tank 2 , To the extent that the transport vehicle 5 moved and thus the distance between the center of the vehicle body 3 and the input-side end wall of the dip tank 2 grows, the pivots become 24 and thus the vehicle body 3 further twisted clockwise, leaving the vehicle bodywork 3 begins to lay on his back. The speed of movement in the horizontal direction and the rotational speed can be coordinated so that the front of the vehicle body 3 in this immersion about the same distance from the input side end of the dip tank 2 reserves.

At the latest in the moment in which the vehicle body 3 completely "on the back" and thus again lying horizontally and the in 5 is shown, the vehicle body 3 completely immersed in the liquid paint. The vehicle body 3 First, in this position with the help of the trolley 5 continue through the plunge pool 2 transported until they are closer to the exit-side end wall of the dip tank 2 has moved on.

Then begins the Austauchvorgang the vehicle body 3 , This in turn represents as a superposition of three movements, namely the horizontal linear movement in the conveying direction 60 , the vertical movement along the guide rails 20 and the rotational movement about the axis of the pivot 24 , First, the vehicle body 3 , as in 6 represented by further rotation of the pivot 24 placed vertically in a clockwise direction. Then the vehicle body "wraps" itself 3 pulling the carriage up 21 and continuing the rotational movement over the exit-side end wall of the dip tank 2 away (cf. 7 ), until then again in the conveying direction 60 behind the plunge pool 2 a horizontal position of the freshly painted vehicle body 3 is achieved in 8th is shown.

The described movement of the vehicle body 3 when passing through the plunge pool 2 is only an example. The constructive design of the trolley 5 allows a variety of other kinematics, each to the nature of the vehicle body 3 can be adjusted.

The described Tauchlackieranlage 1 Can also be used for dip painting smaller items (small items), as shown schematically table in 9 is shown. Instead of the vehicle bodies 3 there are holding baskets 40 at the fastening device 29 the trolley 5 moored, containing the (not shown) small-scale, to be painted objects, for example, in bulk. These holding baskets 40 , which allow penetration of the liquid paint, are in a similar manner by the liquid paint in the dip tank 2 led, as above for the vehicle bodies 3 has been described. However, the holding baskets 40 not "on your back". They reach their in 9 middle position in the plunge pool 2 in which they are again aligned horizontally, by a directed counterclockwise rotation, so that is the top of the baskets 40 after immersion in the paint continues to show up. In this way it is possible the top of the holding baskets 40 to leave open without the contents of the holding baskets 40 could fall out. This is when loading and unloading the holding baskets 40 advantageous.

In the 10 to 19 a second embodiment of a cataphoretic Tauchlackieranlage is shown, the above with reference to the 1 to 9 described embodiment is very similar. Corresponding parts therefore bear the same reference numeral plus 100. The following description is limited to the differences that exist between the two embodiments.

The embodiment of the 10 to 19 is characterized in particular by the fact that the wagon 107 every trolley 105 opposite the associated drive carriage 106 is rotatable about a vertical axis. The meaning of this design feature becomes clear below. This additional rotational degree of freedom, which in the embodiment of 1 to 9 is not present, is made possible by the following constructive measures, which are particularly good in 18 to recognize are:
In the middle between the narrow sides of the guide frame 119 is on the two long sides a longitudinal beam 150 attached. On this longitudinal beam 150 is the wave 114 stored in the embodiment of the 1 at the connection structure 12 of the drive carriage 6 was attached. Also the winding motor 116 is at the top of the longitudinal beam 150 arranged. Also attached to the top of the longitudinal beam 150 is a portal-like driving structure 151 which the wave 114 bridged and at the top of the lower end of a pivot 152 is attached, which is difficult to see in the figures themselves. The pivot 152 in turn is in a warehouse 153 stored, in a recess of an approximately triangular drive plate 154 at the bottom of the connection structure 112 of the drive carriage 106 is attached. Not visible in the drawing is a drive motor, with the help of the pivot 152 can be twisted about its axis.

At one corner of the guide frame 118 is an upwardly projecting guide member 155 attached, which is particularly evident in the 10 to 17 and 19 can be seen and its function is clear below.

The function of the second embodiment of Tauchlackieranlage 101 is the following:
The passage of the vehicle bodies 103 through the plunge pool 102 in the 10 to 17 is done in the same way as described above with reference to 1 to 8th for the first embodiment is described. The pivot 152 which the drive car 106 with the wagon 107 connects, is preferably in the camp 153 locked; the orientation of the guide frame 118 is such that its narrow sides are the guide rails 108 are adjacent and the leadership roles 119 in the guide rails 118 intervention.

The additional degree of freedom that the Transportwa gene 105 in the second embodiment, becomes relevant only when the vehicle bodies 103 have left the dip and from the dolly 105 are accepted for further processing. The dolly 205 then have to go back to the entrance of the Tauchlackieranlage 101 be returned, so they there again with to be painted vehicle bodies 103 can be loaded. To do this, leave the leadership framework 118 the trolley 105 the guide rails 108 that can easily end up in an appropriate place. Now the wagon can 107 opposite the trolley 105 90 ° motor about the vertical axis of the pivot 152 be rotated so that now the long sides of the rectangular guide frame 118 parallel to the direction of movement, as in 18 is shown. The guide member 155 at the top of the guide frame 119 comes into engagement with a (single) guide rail 156 , which are parallel to the continued drive rail 107 along the return path of the trolley 105 extends. Through the mutual engagement of the guide member 155 and the guide rail 156 become unwanted and uncontrolled movements of the carrier 107 opposite the drive carriage 106 prevented.

By the rotation of the trolley 107 opposite the drive carriage 106 is the space required for the trolley 105 on the way back from the exit of the Tauchlackieranlage 101 reduced to its input. This space saving is all the greater, the shorter the narrow sides of the rectangle gene management frame 119 are.

Of course, the second embodiment of a Tauchlackieranlage 101 instead of with vehicle bodies 103 with holding baskets 140 for small-scale, to be painted de objects are provided, as shown schematically in 19 is shown.

In the two examples described above, the translation drive (linear movement in the horizontal direction according to arrow 60 in 1 ) as a drive car 6 ; 106 essentially conventional drive cars used by overhead monorail systems. These have the advantage of a particularly great variability in operation, that they can be moved independently of each other, stopped, if necessary. In their direction of movement can be reversed, the necessary control means are developed and proven. Of course, for the wagons 7 ; 107 but other drive means are provided, in principle, all subsidies come into consideration, in which the wagons 7 ; 107 can be hung down.

The above based on the 1 to 19 manicured species, the vehicle bodies 3 ; 103 through the plunge pool 2 ; 102 Leading is just one example of many different kinematics associated with the dip painting facility 1 ; 101 can be realized. Another example is shown schematically in FIG 20 shown. Here are the supplied vehicle bodies 3 even at a certain distance from the plunge pool 2 inclined at an angle of about 45 ° to the horizontal. The "winding" of the vehicle body 3 on the input side end wall of the dip tank 2 then happens from this tilt similar to in 1 , Before, however, the horizontal supine position of the vehicle bodies 3 is achieved, they are a certain distance again at an angle of about 45 ° relative to the horizontal procedure, as well as after passing through the horizontal supine position before the escape. Sense of this inclination is a shortening of the system in the conveying direction.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10103837 B4 [0002, 0006]
• - DE 19641048 C2 [0003]

Claims (12)

Submerged treatment plant with a) at least one dip tank, which can be filled with a treatment liquid into which the objects to be treated, in particular vehicle bodies, can be immersed; b) a conveyor system which can approach the objects to be treated to the plunge pool, into the interior of the dip tank, out of the plunge pool and from this and which comprises at least one trolley having a rotatable about an axis fastening device to which at least an object is attachable; characterized in that c) the trolley ( 5 ; 105 ) a vertically movable carriage ( 21 ; 121 ), on which the component defining the axis of rotation (FIG. 24 ; 124 ) is stored, such that in total for the at least one object ( 3 . 40 ; 103 . 140 ) a movement sequence is achievable, which is an overlay of a horizontal linear movement, a vertical linear movement and a rotational movement about the axis of rotation ( 24 ; 124 ). Dipping treatment plant according to claim 1, characterized in that the trolley ( 5 ; 105 ) comprises: a) one on a drive rail ( 41 ; 141 ) motor-driven drive carriage ( 6 ; 106 ); b) one on the drive carriage ( 6 ; 106 ) coupled wagons ( 7 ; 107 ), on which the carriage ( 21 ; 121 ) is attached. Dipping treatment plant according to claim 2, characterized in that the drive rail ( 41 ; 141 ) and the drive carriage ( 6 ; 106 ) are formed in the manner of a conventional electric monorail system. Dipping treatment plant according to claim 2 or 3, characterized in that the wagon ( 7 ; 107 ) a guide frame ( 18 ; 118 ), which on at least one extending in the direction of movement guide rail ( 8th ; 108 ) is guided. Submersion treatment plant according to one of claims 2 to 4, characterized in that the drive carriage ( 6 ) at least one motor-rotatable winding roll ( 15 ), on which at least one flexible traction means ( 17 ) is unwound or from this, the lower end of the vertically movable carriage ( 21 ) connected is. Dipping treatment plant according to one of claims 2 to 4, characterized in that the wagon ( 107 ) on a non-vertically movable part ( 150 ) at least one motor-rotatable winding roll ( 115 ), to which at least one flexible traction means ( 117 ) is unwound or from this, the lower end of the vertically movable carriage ( 121 ) connected is. Dipping treatment plant according to claim 5 or 6, characterized characterized in that the flexible traction means is a carrier tape. Dipping treatment plant according to claim 5 or 6, characterized characterized in that the flexible traction means is a chain. Dipping treatment plant according to claim 8, characterized in that that the flexible chain is designed so that they are under Pressure stiffens, so they transmit compressive forces can. Submersion treatment plant according to one of the preceding claims, characterized in that the engine ( 26 ; 126 ), with which the component defining the axis of rotation ( 24 ; 124 ) is rotatable on the carriage ( 21 ; 121 ) is arranged and moved vertically together with this. Submersion treatment plant according to one of the preceding claims, characterized in that the wagon ( 107 ) opposite the drive carriage ( 106 ) is rotatable about a substantially vertical axis. Submersion treatment plant according to claim 11, characterized in that along the return path of the trolley ( 105 ) from the exit to the entrance of the dipping treatment plant ( 101 ) at least one guide rail ( 156 ), with one on the wagon ( 107 ) guide member ( 155 ) works together.