DE202009015378U1 - Arrangement by which during assembly of a device loosely assembled parts of the device can be brought into a proper relative position - Google Patents

Abstract

Arrangement by which during assembly of a device loosely assembled items (2) of the device can be brought into their intended relative position, with
- a frame (1) for storing the loosely assembled items (2),
- A clamping device (41-44) for bringing the items (2) in the intended relative position, and
- A jig holding device (91, 92) for holding the clamping device (41-44) in the position that they must hold to bring the items (2) in the intended relative position,
characterized,
in that a tensioning device moving device (11, 12, 11-1, 11-2) is provided, by means of which the tensioning device (41-44), together with the tensioning device holding device (91, 92) holding the same, can be brought into the position they must have to bring the items (2) in the intended relative position.

Description

The The present invention relates to a device according to the preamble of the protection claim 1.

A Such device may be used, for example, in the manufacture of motor vehicles, more precisely in the manufacture of the body of motor vehicles be used.

The Production of the bodyshell takes place at least in mass production step for Step in several workstations in each workstation on the previously manufactured body shell a certain further car body manufacturing step is performed. Between The workstations are conveyors provided by which the previously finished body shells be transported from workstation to workstation. The transport is timed. That is to say, the body shells completed so far stay in the workstations for a specific amount of time, the retention time for all Workstations is the same, so everyone is just in the making located Rohkarossen can be moved synchronously. The in the respective Workstations running Shell carving steps preferably take approximately the same amount of time. Under no circumstances This time may be longer as the length of stay of the previously completed bodyshells in the workstations, because one in a workstation is not completed car body manufacturing step may be in the subsequent workstation not continue. The entire arrangement is referred to as Rohkarossenstraße.

In one of the provided along the Rohkarossenstraße workstations become the sidewalls the manufactured body with the hitherto assembled connected to other components of the body shell. This connection usually takes place by welding. Due to the usually relatively short residence time of the bodyshells in however, the workstations generally do not fully weld. Rather, usually only a pointwise fixation is performed. Independent of this it is of the utmost importance that the side walls and the rest of the previously assembled body shell exactly the intended relative position take each other and be fixed in this position. In this Workstation misalignment may occur in subsequent workstations no longer be corrected. The maximum tolerances are in the range by a few tenths of a millimeter, preferably even below it.

For this will be including appropriately trained (sidewall) clamping devices needed. These jigs are in the example considered on the side walls of Body-in-white adapted (sidewall) tenter frames, through which the side walls in the intended form as well as the intended position and the intended location in relation to the rest of the previously finished body shell to be brought.

The processes taking place in the relevant workstation are as follows:
First, the previously finished body shell (by moving in the x direction) is transported to the workstation in question. Once there, the body shell is placed in a precisely predetermined position on a frame referred to below as Presision Steel Construction and the bottom of the body shell clamped on it. Then who moved (by a movement in the y direction) simultaneously from the left and from the right in each case a (side wall) clamping frame to the body shell. The approach is made by two gantry carriages (one gantry carriage per tenter frame) running on a bridge extending across the body shell. The gantry carriages and the tenter frames carried by them are moved in the y direction until the tenter frames are docked to a tenter restraint. When docked to the clamping frame holding device state, the clamping frames are no longer moved, but held immovably by the clamping frame holding device in the then assumed position. The clamping frame holding device is formed in the example considered by belonging to Präzisionsstahlbau, non-movable columns or other Präzisionsstahlbau components. The arrangement is designed so that the clamping frames in the docked to the precision steel construction automatically state the position and the position they must take to bring the side walls of the body shell in the desired shape and the desired relative position with respect to the rest of the body shell. For the sake of completeness, it should be noted that it may additionally be provided to be able to move the clamping frames up and down through the gantry carriages, more precisely through appropriately designed z-axes (move in the z-direction).

After this the side walls the body shell reaches its intended shape, position, and position have what's from the time of docking the tenter to the Clamping frame holding device is automatically the case side walls and the rest of the previously finished body shell, for example by welding together connected.

In the 1 shows the part of precision steel construction to which the clamping frames are docked. The above-mentioned columns, to which the clamping frames are docked with the reference numerals 191 . 192 . 193 , and 194 designated. The in the 1 The body shell, not shown, is approximately in the middle between the columns 191 - 194 discontinued. Subsequently, the in the 1 not shown (side wall) tenter frame as described above from outside of the columns 191 to 194 enclosed area moved by a movement in y-direction to the body shell and finally to the columns 191 to 194 docked. Im at the pillars 191 to 194 docked state is the one clamping frame between the columns 191 and 192 and is on the pillars 191 and 192 docked (connected to these), and is the other clamping frame between the columns 193 and 194 and is on the pillars 193 and 194 docked (connected to these).

Im at the pillars 191 to 194 docked state of the clamping frame, the clamping frame come into contact with the body shell and can even protrude into the space enclosed by the body shell and / or engage around certain body work components. Therefore, before the removal of the last processed body shell from the workstation and the transport of the next to be machined body shell in the workstation, the clamping frames must be managed out of the way. For this, the tenter frames of the columns 191 to 194 undocked and moved by a movement in the y-direction of the body shell laterally (in y-direction). The latter happens again through the gantry carriages, which have previously brought the clamping frames into the position now to be left.

In the Rohkarossenstraße can Body shells for different vehicle models and different types of vehicles produced become. Different vehicle models and different vehicle types have at least partially different side walls. Different side walls but require the use of different, to the respective side walls and the rest of the body shell customized tenter. So if in the Rohkarossenstraße successively manufactured car bodies with different side walls who should, must Also different clamping frames can be used.

If alternately different clamping frames are needed, for example be provided that at each portal sled not just one single z-axis with a tenter attached, but two z-axes each provided with an attached clamping frame are. Then the particular required clamping frame be selected from two different tenter frames and the respectively not needed Clamping frame (for example, by raising the not required tenter supporting z-axis) be driven out of the way. Alternatively or additionally, can be provided on each side of the bodyshell not just one but two portal slides to provide, each gantry one or two tenter can carry. In this case, the required clamping frame can be up to four different clamping frames are selected and each not required Tentering frame (for example, by a corresponding method of just not needed Portal slide and a startup of the unneeded tenter bearing z-axis of the needed Portal slide) are driven out of the way.

The previously described possibility of alternately different To be able to use clamping frames is with a very big one Expenses connected, opened but at least the possibility to be able to use different clamping frames alternately.

Independent of this is the possibility in the respective workstation alternately different To produce / edit body shells, strong restrictions subjected. As understood without further explanation likely, allowed to both the lengths as well as the widths of the bodies to be manufactured / machined do not exceed certain maximum values and should not fall below certain minimum values, and should neither the lengths even the widths of successive to produce / edit Body shells too different from each other. Otherwise it can the relevant body shells either not at all or only with a disproportionate effort manufactured / edited in this workstation.

Of the The present invention is therefore based on the object, the arrangement according to the generic term of the protection claim 1 in such a way that these easier, faster and cheaper manufacturable / buildable, and easier and more flexible operable is.

These The object is achieved by the characterizing part of the protection claim 1 claimed features solved.

Different expressed this means that the jig holding device is no longer as before through fixed columns or the like, but together with the attached thereto Clamping device can be moved.

The movability of the chuck fixture allows the chucks held by them to be as desired can be moved towards each other, and thus the width of the manufactured / machined body shell is no longer subject to restrictions.

The Mobility of the jig-holding device makes it possible Furthermore, that the clamping devices and the jig holding devices unlike previously associated with each other. The Namely, the jig holding device can move away from the body shell which makes the jig no longer just a movement the tensioning device in the y direction in conjunction with the jig holding device can be brought, but in other ways.

For example can the tensioning device from above, so by a movement in the z-direction associated with the jig holding device become. Because the jig holding device is not It must be more directly on the body shell, it is beyond also possible, the jig so on the jig holding device to arrange that the tensioning device between the body shell and Clamping fixture comes to rest. this in turn allows it that the length of the Tenter frame should be larger may be the distance of the jig holder forming columns or the like and thus also the length of the manufactured / zu Machining body is no longer subject to restrictions.

By the inherently greater flexibility of the arrangement in terms of length and the width of the body shell eliminates the need for exceptional lengths and widths of body shells, or large length and / or width differences successive bodies to be produced / machined the clamping devices on unusual Resort to custom-made products to have to, which imposed by the tensioner fixture restrictions some could still be lifted. Such custom-made products were, for example, but not exclusively required if under Use of an original for special wide body shells designed precision steel construction a special narrow bodyshell should be manufactured / processed; there the the jig holding device forming columns not movable were, had the big one Distance between jig fixture and body shell through appropriately trained clamping devices are bridged. Such and other custom-made products were common especially large, required the use of special materials or were correspondingly difficult, were cumbersome to handle, led to an unfavorable Weight or moment distribution, and were also particularly expensive.

That the tensioning device between the body shell and the tensioning device holding device comes to rest, allows it is further to arrange the jig holding device such that as much as possible of the work to be done in the workstation little handicapped. Alone the fact that the clamping device no longer as before between the jig-holding device forming columns or the like must come to rest, so the columns themselves not necessarily on the side next to the tensioning device have to, open the welding robots at previously particularly difficult to access Give a greater freedom of movement.

Furthermore This simplifies the connection of the clamping device with the chuck fixture. The at the beginning described usual Arrangement to be carried out Dock the tensioner to the side of the tenter frame Tensioners Latches coming to lay required one very elaborate and correspondingly expensive docking mechanism, on in the inventive arrangement can be waived. The tensioning devices can, as already above mentioned was, for example, by a movement in the z direction with the Clamping fixture to be associated, which makes it possible with very little effort, the clamping device automatically to their intended position and without one special docking mechanism with the chuck fixture to connect.

The Possibility, the tensioning device in the moving away from the body shell state of the clamping device holding device allows to attach to the jig holding device allows Furthermore, possibly required clamping device change too simplify.

A such trained arrangement is easier, faster and cheaper manufacturable and buildable, and easier and more flexible to operate than conventional Arrangements.

advantageous Further developments of the invention and further advantages of the invention are the following description, the dependent claims, and the figures removable.

The Invention will now be described with reference to exemplary embodiments with reference closer to the figures explained. Show it

1 a perspective view of a portion of the conventional arrangement described above, through which during assembly of a device loosely assembled items of the device can be brought into a proper relative position,

2 a side view of a first embodiment of the arrangement presented here, through which during assembly of a device loosely assembled individual parts of the device can be brought into a predetermined relative position,

3 a side view of a second embodiment of the arrangement presented here, through which during assembly of a device loosely assembled items of the device can be brought into a proper relative position,

4 a side view of a third embodiment of the arrangement presented here, through which during assembly of a device loosely assembled items of the device can be brought into a proper relative position, and

5 a perspective view of an applicable in all embodiments clamping device holding device of the arrangement presented here, through which during assembly of a device loosely assembled items of the device can be brought into a proper relative position.

The Arrangement, based on which the present invention hereinafter is described in more detail, is an arrangement by which during the manufacture of a Motor vehicle loosely assembled Individual parts of the motor vehicle body shell in a proper relative position can be brought. More specifically, by the described arrangement the side walls the body shell in the desired Relative position relative to the rest of the previously completed Body shell brought. It is already explicitly stated here noted that this arrangement is only a specific embodiment the type of arrangement presented here is. The arrangement according to the invention can also for the manufacture of any other devices be designed composed of several items to be aligned with each other are.

The in the following described arrangement has exactly the same function as the beginning described conventional Arrangement. D. h., Through them, the side walls of a body shell of a Motor vehicle in the desired Relative position relative to the rest of the previously completed Body shell brought.

to Avoid misunderstandings It should be noted that the figures are only highly schematic Show representations and above In addition, only those components of the illustrated Arrangements are shown and described, which in the present case of particular Interest are.

In the 2 a first embodiment of the arrangement presented here is shown. The arrangement shown comprises a frame 1 and two on the rack 1 reciprocable carriages 11 and 12 , The frame 1 also serves as a support for a hitherto completed body shell 2 , To the sledges 11 and 12 It should be noted at this point that it may prove advantageous, instead of a sled 11 provide several synchronously moving carriage, and also instead of a carriage 12 provide several synchronously moved carriage. This will be discussed later.

The frame 1 is attached in the example considered on the ground and in the example considered is preferably made of metal. More specifically, as in the conventional arrangement described above, it is a precision steel construction, which, however, as will be explained in more detail later, has a different construction than the precision steel construction used in the conventional arrangement.

The body shell 2 is by a perpendicular to the drawing plane movement (a movement in the x direction) to that in the 2 transported shown arrangement. Once there, she is in a precisely predetermined position on the frame 1 discontinued. Preferably, along with it, the floor of the body shell on the frame 1 curious; excited. Through the frame 1 and the settling and stretching of the body shell on the frame 1 involved further components of the arrangement will ensure that on the frame 1 attached Rohkarossen with at least in the range of tenths of a millimeter accuracy, but preferably with even smaller deviations / tolerances always exactly the same (default) position on the frame 1 taking.

The sledges 11 and 12 are in the 2 only highly schematized as a block. From the two sledges 11 and 12 is the sled 11 to the left of the body shell 11 , and the sled 12 right of the body shell 2 arranged. The sledges 11 and 12 are, as in the 2 indicated by double arrows on rails mounted on the frame or on the ground in the y-direction back and forth. On every sled 11 . 12 is one in the 2 not ge showed (fixture) holding device provided by which a in the 2 also not shown clamping device is held exactly in a predetermined position. This fixture is in the example considered a sidewall clamping frame, which is needed to one on the body shell 2 Loose attached side wall in the desired shape and the desired relative position in relation to the rest of the body shell 2 bring to. The clamping frame largely corresponds to the clamping frame of the conventional arrangement described above. However, there are differences in the handling of the tenter and its attachment to the fixture, which may also affect the structure of the tenter. The tenter is only, if another tenter must be used for body-in-white production, released from the holding device arranged on the carriage, and is permanently connected to the holding device at all other times.

The on the sled 11 and 12 located and attached to their fixtures clamping frame are by the carriage 11 and 12 brought into the position that must hold the clamping frame so that they can bring the side walls of the body shell in the desired shape and the desired relative position to the rest of the body shell. The clamping frames are already on the holding devices of the carriage 11 and 12 attached, that no change is required during operation of the arrangement here. So it's enough, the sledges 11 and 12 Move in the y-direction to bring the tenter in the required for the proper operation of the arrangement position and location. The sledges 11 and 12 be simultaneously to the body shell 2 moved up and (after the fixation of the side walls on the rest of the previously manufactured body shell) moved away again.

As later in particular with reference to 5 will be explained in more detail, replace in the arrangement presented here on the carriage 11 . 12 provided and thus movable holding devices in accordance with the conventional arrangement 1 rigidly connected to the precision steel construction holding device, more precisely, these forming pillars 191 - 194 ,

The sledges 11 and 12 are manufactured in machine tool quality. That's why and because they're on the frame designed as precision steel 1 or driving on the ground, they can approach the desired position with the highest accuracy and minimum tolerances.

The sledges 11 and 12 or the plurality of carriages provided in place of these carriages, the tenter frame holding devices provided on the carriages, and the tenter frames carried by the tenter frame holders are shown in FIG 5 illustrated in more detail.

The moving through the carriage tenter are in the 5 with the reference numerals 43 and 44 designated. To avoid any misunderstanding, it should be noted that the using the tenter 43 . 44 body to be manufactured / machined during production / processing between the tenter 43 . 44 must be located. Each of these clamping frames is held by a clamping frame holding device already mentioned above in a defined position. The clamping frame holding devices are formed in the example considered by columns, with which the clamping frame can be brought into connection. Although the realization of the stretcher fixtures by columns is currently considered to be advantageous, there is no compelling need to form the stretcher fixtures in this way; The clamping frame holding devices could also be designed differently. In the example considered, each clamping frame is held by two columns, of which in the 5 only the tenter 43 holding columns 91 and 92 are shown; the two of the tenter 44 holding columns are behind the tenter 44 and are therefore in the 5 not visible. For the sake of completeness, it should be noted that there is no compelling need to provide two columns per tenter. If required, more than two columns per tenter can be provided; Under certain circumstances, a single column per tenter may be sufficient.

In the in the 5 shown example are for the movement of the clamping frame 43 . 44 two sleds each provided. The sledges holding the tenter 43 and the tenter frame 43 supporting pillars 91 and 92 wear and move, are in the 5 with the reference numerals 11-1 and 11-2 designated. The sledges ride on rails 13 placed directly on the ground or on a rack mounted on the ground, for example on the ground 2 with the reference number 1 designated frame, or another frame are mounted. For the movement of the other tenter 44 and these supporting columns are also provided two carriages, which, however, in the 5 are not visible.

Each of the carriages carries a portion of the tenter frame supporting jigs. In the example considered, each carriage carries one of the columns forming the clamping frame holding device 91 . 92 , If more than two columns per tenter are provided or - more generally - if a tenter frame carrying clamping frame-holding device of more If there are two parts, more carriages can be provided per tenter frame. The plurality of carriages are preferably not mechanically interconnected. However, they are preferably moved synchronously with each other.

By the carriages will be the tenter frames together with the ones holding them Tensioning frame fixtures moved to the position they must have so that they are the side walls of the Body shell in the desired Shape and the desired Can bring relative position to the rest of the body shell.

Preferably, the arrangement contains

• - one Detection device, which detects whether the moving Carriage and / or the part of the tenter frame holding device provided thereon, and / or the tenter held thereby in position, in which they must be so that moving through the carriage tensioning device in the Position is that they have to bring the items in the intended relative position must, and
• - one Control device adapted to drive a respective one Stop sledging and keep the sled in that position, though is detected by the associated detection device that the An arrangement component whose position by the detection device who has reached the position in which they are located must, so that moved through the carriage tensioner located in the position that they use to bring the items into the intended relative position must have.

Possible practical Implementations of detection device and control device are known and required by the person skilled in the art none nearer Explanation.

As can be seen from the above explanations, in the arrangement presented here, the clamping frame holding devices 91 - 94 not like the one in the 1 shown conventional arrangement formed by fixed columns, but can together with the clamping device attached thereto 43 . 44 to be moved.

This mobility of the clamping frame holding devices 91 - 94 allows the tenter to be held by them 43 . 44 can be moved as far as desired to each other, and thus the width of the manufactured / machined body shell is no longer subject to restrictions.

The movability of the tenter holding devices 91 - 94 it also allows the tenter frame 43 . 44 and the tenter holding devices 91 - 94 unlike previously associated with each other. The clamping frame holders 91 - 94 Namely, as described above, by a corresponding method of the carriage 11 . 12 respectively. 11-1 . 11-2 . 12-1 . 12-2 be moved laterally away from the body shell, causing the tenter 43 . 44 no longer just by a movement of the clamping frame in the y-direction in conjunction with the clamping frame holding devices 91 - 94 can be brought, but also in other ways. For example, the tenter frame 43 . 44 from above, so by a movement in the z-direction with the clamping frame holding devices 91 - 94 be associated. This would be the case in the 1 shown conventional arrangement is not possible because the clamping frame are connected there with a non-movable clamping frame holding device and the clamping frame in the connected to the clamping frame holding device state with the body shell in contact and even protrude into the space enclosed by the body shell and / or specific Can surround body components. Because in the arrangement presented here, the clamping frame holding devices 91 - 94 while attaching the tenter 43 . 44 In addition, it is also possible to have the tenter frame directly on the body shell 43 . 44 so on the tentering fixtures 91 - 94 to arrange that the clamping frame come to lie between the body shell and tenter-holding devices. This, in turn, allows the length of the tenter frame 43 . 44 can be greater than the distance of the columns forming the jig holding device 91 and 92 respectively. 93 and 94 or the like, and thus the length of the manufactured / machined body shell is no longer subject to restrictions.

Due to the inherently greater flexibility of the arrangement presented here in terms of the length and width of the bodies, eliminating the need for exceptional lengths and widths of bodyshells, or large differences in length and / or width in succession to be produced / machined bodyshell in the To have to resort to unusual custom-made tenter frame, through which the restrictions imposed by the tenter-holding device could still be partially lifted. Such custom-made products were, for example, but not exclusively required, when a particularly narrow bodyshell was to be manufactured / machined using a precision steel construction originally designed for particularly wide body shells; there the Tensioning frame holding device forming columns were not movable, the large distance between the clamping frame holding device and body shell had to be bridged by appropriately trained clamping devices. Such and other custom designs were often particularly large, required the use of special materials or were correspondingly heavy, were cumbersome to handle, resulted in an unfavorable weight or moment distribution, and were also particularly expensive.

That the tenter frame 43 . 44 between the body shell and the tenter-holding devices, it also makes it possible to arrange the tenter-holding devices so that they hinder the work to be performed in the workstation as little as possible. Alone the fact that the tenter 43 . 44 no longer between the pillars holding device forming columns 91 - 94 or the like must come to rest, so the columns 91 - 94 not necessarily laterally next to the tenter 43 . 44 must find the welding robots used for welding at previously particularly difficult to access places a greater range of motion.

In addition, this simplifies the connection of the clamping frame with the clamping frame holding devices. The docking of the clamping frame to be carried out at the side of the clamping frame to be carried out in the conventional arrangement described above and the clamping frame between them receiving columns required a very complex and expensive docking mechanism. As follows, in particular, with reference to FIGS 3 and 4 will be explained in more detail, can be dispensed with in the arrangement presented here on such a complicated and expensive docking mechanism. The clamping frames 43 . 44 For example, by a movement in the z-direction with the clamping frame holding devices 91 - 94 be brought into connection, whereby it is possible with very little effort, the tenter 43 . 44 automatically to guide in its intended position and without a special docking mechanism with the tenter-holding devices in conjunction.

The possibility of the clamping frame 43 . 44 in moving away from the body shell state of the clamping frame holding device 91 - 94 To be able to attach to the jig holding device, it also makes it possible to simplify any necessary tenter frame changes. This will be explained below with reference to the 3 and 4 explained in more detail.

As can be seen from the above explanations, in the 2 shown and described with reference thereto arrangement, despite the advantages thereby achievable a much simpler and cheaper to implement construction than the conventional arrangement described above.

With the in the 2 shown arrangement and described above with reference thereto, no change of the clamping frame can take place during the ongoing body-in-white manufacturing operation. The arrangement will thus generally be suitable only for the production of a single type of motor vehicle.

These Arrangement can however (if necessary also subsequently) to that extent extended be made that alternately motor vehicle types with different side walls can be.

An arrangement in which the clamping frames are interchangeable if necessary, is in 3 illustrated.

The in the 3 The arrangement shown contains all the components that also in the 2 shown arrangement (identical or corresponding components are denoted by the same reference numerals), and additionally has a on the frame 1 extending bridge 3 and two gantries riding on it 31 and 32 on.

The first portal sled 31 has two independently movable up and down z-axes 311 and 312 each of which is capable of receiving and supporting a tenter; in the in the 3 shown state carries the first z-axis 311 a (only schematically shown) tenter 41 whereas the second z-axis 312 does not carry a tenter.

The situation is similar with the second portal slide 32 , This has two independently movable up and down z-axes 321 and 322 each of which is capable of receiving and supporting a tenter; in the in the 3 shown state carries the first z-axis 321 a (only schematically shown) tenter 42 whereas the second z-axis 322 does not carry a tenter.

The z-axes 311 . 312 . 321 , and 322 are movable up and down in their entirety and / or include several members that are telescopically extendable and contractible.

Through the portal carriages 31 and 32 and de ren z-axes 311 . 312 . 321 , and 322 can the on the respective sled 11 and 12 be replaced by other clamping frames. More precisely, the one on the sled 11 Tensioning frame located by the z-axis of the portal slide, which does not support a tenter 31 that is, through the z-axis 312 from the holding frame of the carriage carrying the respective clamping frame 11 removed and moved up out of the way, and then (by a corresponding method of the portal slide 31 and / or the sled 11 ) on the other z-axis 311 hanging tenter frame 41 on the sled 11 drained and thus with the on the sled 11 provided holding device intended to be engaged. At the same time, that can be on the sled 12 Tensioning frame located by the z-axis of the portal slide, which does not support a tenter 32 that is, through the z-axis 322 from the holding frame of the carriage carrying the respective clamping frame 12 removed and moved up out of the way, and then (by a corresponding method of the portal slide 32 and / or the sled 12 ) on the other z-axis 321 hanging tenter frame 42 on the sled 12 drained and thus with the on the sled 12 provided holding device intended to be engaged.

After completing these actions

• - originally hanging on the sled 11 located clamping frame on the z-axis 312 .
• - is originally located on the z-axis 311 hanging tenter frame 41 on the sled 11 .
• - originally hanging on the sled 12 located clamping frame on the z-axis 312 .
• - is originally located on the z-axis 321 hanging tenter frame 42 on the sled 12 , and
• - hang on the z-axes 311 and 321 no tenter.

So it's a substitution on the sled 11 and 12 Tensioning frame is located so that the next body shell using other tenter frames (using the previously on the z-axis 311 and 321 hanging tenter 41 and 42 ) can be edited. Of course, if necessary, a renewed tenter frame change is possible at any time. The clamping frames which are not required hang on one of the z-axes of the gantry carriages 31 and 32 and will be stored there until their next use.

The on the sled 11 and 12 provided holding devices for holding the clamping frame respectively located on the carriage are preferably designed so that new to the carriage 11 and 12 offset tenter come along with the release of the clamping frame on the carriage automatically in the intended clamping frame position (in the x-, y-, and z-direction) in relation to the fixture. One possibility for this is that guide devices are provided on the holding devices, via which the clamping frames are driven or forced automatically into their intended position when driven on the slides by the weight of the clamping frames. The guide devices preferably have insertion aids at their upper end, ie they are widened, for example, so that the clamping frames are captured by the guide device, as it were, through a funnel and are guided / forced into the intended position.

• – dass die am Spannrahmenwechsel beteiligten Anordnungskomponenten, also insbesondere die Brücke 3, die Portalschlitten 31 und 32, sowie deren z-Achsen 311, 312, 321 und 322 nicht mit höchster Präzision arbeiten müssen, und
• – dass auf spezielle Andockvorrichtungen zum Andocken der Spannrahmen an einer Komponente des Gestells 1 oder der Schlitten 11 und 12 verzichtet werden kann.

This makes it possible

• - That involved in the tenter frame assembly components, ie in particular the bridge 3 , the portal sled 31 and 32 , as well as their z-axes 311 . 312 . 321 and 322 do not have to work with the highest precision, and
• - That on special docking devices for docking the tenter on a component of the frame 1 or the sled 11 and 12 can be waived.

Of the for the Interchangeability of the clamping frame to driving extra effort is thus relatively low and, above all, much lower than it was at the beginning described conventional Arrangement of the case.

By in the 3 As shown and described with reference thereto, a tenter frame of two different tenter frames may be selected for use, respectively, so that alternately two types of motor vehicles with different side walls may be manufactured.

For the sake of completeness it should be mentioned that there is no compelling need, two gantry carriages 31 . 32 provided. It could also be provided that there is a separate portal slide for each z-axis. In principle, any number of gantry carriages can be provided, and any number of z-axes can be provided on each of the existing gantry carriages.

The 4 shows an arrangement by which alternately more types of vehicles with different side walls can be produced.

The in the 4 The arrangement shown contains all the components that also in the 3 shown arrangement (identical or corresponding components are denoted by the same reference numerals). However, the bridge extends 3 right and left further out, and are under the left bridge extension 5 and under the right bridge extension 6 one clamping frame bearing each 7 respectively. 8th provided, in which further clamping frames are stored, through the portal slide 31 and 32 if necessary can be picked up from there.

To avoid misunderstanding, it should be noted that the bridge extensions 5 and 6 are no separate parts or at least not have to be separate parts, but only the difference to that in the 3 to illustrate the arrangement shown.

The tension frame bearings 7 and 8th are each formed in the example considered by a pedestal, but can of course also be formed by any device designed differently. On this pedestal each unused tenter frame from above are deductible. The tenter bearing may (but need not necessarily) include means of transport by which the tenter can be moved to a desired location within the tenter frame. Due to this transport option eliminates the need for the tenter frame just under the bridge 3 . 5 . 6 to store. As a result, on the one hand can keep short the paths that the portal slide 31 . 32 have to go back to bring a tenter frame from the tenter frame or back there, and on the other hand exist more Freihei th in the spatial dimensioning of the tenter frame bearing, especially in determining the length, width and length / width ratio of the tenter frame.

The For example, in the tenter frame provided transport means be formed by movable rails on rails.

• – dass, wenn nicht gerade ein Spannrahmenwechsel stattfindet, an jeweils einer der beiden z-Achsen 311, 312 bzw. 321, 322 der Portalschlitten 31 und 32 kein Spannrahmen hängt, und
• – dass an der jeweils anderen z-Achse spätestens dann, wenn die gerade auf den Schlitten 11 und 12 befindlichen Spannrahmen gewechselt werden müssen, diejenigen Spannrahmen hängen, durch die die gerade auf den Schlitten 11 und 12 befindlichen Spannrahmen ersetzt werden müssen, wobei die Spannrahmen, durch die die gerade auf den Schlitten 11 und 12 befindlichen Spannrahmen ersetzt werden müssen, durch die Portalschlitten 31 und 32 rechtzeitig vorher aus den Spannrahmenlagern 7 und 8 geholt werden, wenn sie nicht schon an einer der z-Achsen 311, 312 bzw. 321, 322 der Portalschlitten 31 und 32 hängen.

If body shells with different sidewalls are alternately produced in the production of body shells, it is generally known in advance in advance which sidewalls have the next body shells to be produced next or which stenter frame is required in each case for this purpose. The arrangement contains a control device which ensures

• - That, if not a tenter frame change takes place, in each case one of the two z-axes 311 . 312 respectively. 321 . 322 the portal sled 31 and 32 no tenter hangs, and
• - that on the other z-axis at the latest when the straight on the slide 11 and 12 Tensioning frame must be replaced, those tensioning frames hang, through which the straight on the slide 11 and 12 located tenter must be replaced, with the tenter, through which the straight on the slide 11 and 12 must be replaced by the gantry slides 31 and 32 timely before from the tenter frames 7 and 8th to be fetched if they are not already on one of the z-axes 311 . 312 respectively. 321 . 322 the portal sled 31 and 32 hang.

The possibly required to get later required tenter from the Clamping frame bearing hinders the Rohkarossenherstellung in None Wise. The gantries retrieving the clamping frames from the clamping frame bearing be for the actual Rohkarossenherstellung not needed. Furthermore is for catching up later required tenter Less time is needed from the tenter frame than between the two Tension frame change minimum available time.

After a possibly required to get later required tenter frame from the tenter frame bearing the portal slide 31 . 32 preferably set so that the z-axis carrying no clamping frame is already exactly above the points at which in the case of a tenter frame to be replaced tenter on the carriage 11 and 12 to lie down, leaving the portal slide 31 . 32 no movement in the y-direction before changing the tenter frame.

By in the 4 As shown and described with reference thereto, a tenter frame of three or more different tenter frames may be selected for use, respectively, so that alternately three or more types of dual-side tiller motor vehicles may be manufactured.

As can be seen from the above explanations, with reference to the 2 to 5 presented type of arrangement with little effort to be adapted to changing needs of the user. More specifically, in the 2 shown arrangement simply by adding the bridge 3 and the portal sled 31 and 32 in the in the 3 turn arrangement shown, and in the 3 shown arrangement simply by extending the bridge and adding the tenter frame bearings 7 and 8th in the in the 4 transform the arrangement shown. This is advantageous because initially only a single type of body-in-white is often produced when a new Rohkarossenstraße is put into operation is, and thus in the 2 shown simplest and cheapest variant of the arrangement is sufficient. If then later in the relevant Rohkarossenstraße two different body types are to be produced, this arrangement must be supplemented only to the components that comply with the arrangement 3 additionally has. That means it just has to be the bridge 3 with the portal sleds provided 31 and 32 additionally be built. The situation is similar when more than two different types of bodyshell are to be produced later in the relevant Rohkarossenstraße. For this, the arrangement according to 3 only with a longer bridge or a bridge extension and additional tenter frames 7 and 8th be provided. This modular structure of the type of arrangement presented here makes it possible for the least possible investment costs to be incurred in each production phase, and only that part of the arrangement which is actually required to be built and paid for must be constructed. The type of arrangement presented here is or contains a decoupled assembly system for clamping frames.

The above with reference to the 2 to 5 presented type of arrangement, through which during manufacture of a body shell, the side walls can be brought into a proper shape and a proper position and location with respect to the rest of the previously manufactured body shell, has a number of advantages over the conventional arrangement described above a whole lot of advantages , Several of these benefits have already been mentioned above. In addition to the advantages already mentioned, the arrangement presented here also has the following further, equally significant advantages:
First, the arrangement presented here allows the time required to be on the slide 11 . 12 replace existing clamping frame against other clamping frames, both in the 3 shown arrangement as well as in the in 4 shown arrangement is always the same size. This is the case even if in the case of 4 described arrangement, the new clamping frame would have to be brought before the tenter frame change from the tenter frames, because this can indeed, as already explained above, take place before the time at which the change has to be made. The fact that the tenter frame change time is always the same under all circumstances is advantageous because it does not present any special cases which require special consideration in the design of the relevant workstation or the body shop line. In the conventional arrangement described above, this is not the case. There, the tenter change time depends on which tenter is to be replaced by which other tenter. In addition, the tenter frame change time in the arrangement presented here is also very short, namely only 8 seconds. In the conventional arrangement described above, the tenter changing time is 10-17 seconds.

Secondly, in the arrangement presented here, no portal operating with particularly high accuracy must be provided. Although is also in the in the 3 and 4 shown arrangements a bridge 3 respectively. 3 . 5 . 6 with portal sled 31 . 32 present, but it is sufficient in the arrangement presented here, if at the lower end of the z-axes 311 . 312 . 321 . 322 an accuracy of approx. ± 5 mm is maintained. In the conventional arrangement described above, an accuracy of about ± 0.5 mm, that is a factor of 10 higher accuracy required.

Third, the arrangement presented here is much cheaper to manufacture and operate than a conventional arrangement with the appropriate capabilities and performance. This is especially true for those in the 2 shown arrangement, because there is not even a bridge provided with gantry carriage on it. However, this applies, for example, because of the much lower demands on the working accuracy of bridge and portal slide for the in the 3 and 4 shown arrangements. The modular design of the type of arrangement presented here also makes it possible to construct and pay for only that part of the arrangement that is actually needed, and the arrangement - again with minimal possible investment costs - for the production of more different body types expand.

Fourth are in the arrangement presented here, the installation and commissioning times very much much lower than in the conventional described above Arrangement of the case. This is partly due to the fact that the here presented arrangement already in the manufacturing plant to about 80% can be put into operation, and in the construction of the end customer only relatively few adjustments and adjustments made Need to become.

The The arrangement presented here thus turns out to be independent of the details of the practical realization in multiple Regard as extremely beneficial.

1

frame (Präzsionsstahlbau)

2

to here finished body shell

3

bridge

5

left bridge extension

6

right bridge extension

7

left Tenter camp

8th

right Tenter camp

11

carriage

11-1

carriage

11-2

carriage

12

carriage

13

rail

31

overhead slide

32

overhead slide

41

tenter

42

tenter

43

tenter

44

tenter

91

pillar

92

pillar

93

pillar

94

pillar

191

pillar

192

pillar

193

pillar

194

pillar

311

z-axis

312

z-axis

321

z-axis

322

z-axis

Claims (52)

Arrangement by which, during the manufacture of a device, loosely assembled individual parts ( 2 ) of the device in their intended relative position can be brought, with - a frame ( 1 ) for storing the loosely assembled items ( 2 ), - a tensioning device ( 41 - 44 ) for bringing the items ( 2 ) in the intended relative position, and - a tensioning device holding device ( 91 . 92 ) for holding the tensioning device ( 41 - 44 ) in the position that you need to bring the items ( 2 ) in the intended relative position, characterized in that a tensioning device movement device ( 11 . 12 ; 11-1 . 11-2 ) is provided, through which the tensioning device ( 41 - 44 ) together with the clamping device holding device (FIG. 91 . 92 ) can be brought into the position that they need to bring the items ( 2 ) must have in the intended relative position. Arrangement according to claim 1, characterized in that - the tensioning device movement device ( 11 . 12 ; 11-1 . 11-2 ) at least one on the frame ( 1 ) or to the ground reciprocable carriage, - that on the carriage 11 . 12 ; 11-1 . 11-2 ) also the tension device holding device ( 91 . 92 ), and - that the tensioning device ( 41 - 44 ) already while moving through the carriage 11 . 12 ; 11-1 . 11-2 ) in the position that they are to bring the items ( 2 ) in the intended relative position, with the tensioning device holding device ( 91 . 92 ) connected is. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) in the clamping device holding device ( 91 . 92 ) connected state between the by the tensioning device ( 41 - 44 ) in the intended relative position to be brought items ( 2 ) and the fixture holding device ( 91 . 92 ) is arranged. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that in the clamping device with the fixture ( 91 . 92 ) connected state of the tensioning device ( 41 - 44 ) the side of the tensioning device ( 41 - 44 ) passing through the tensioning device ( 41 - 44 ) in the intended relative position to be brought items ( 2 ) and the side of the tensioning device ( 41 - 44 ), the tensioner fixture ( 91 . 92 ), opposing sides of the tensioning device ( 41 - 44 ) are. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that in the clamping device with the fixture ( 91 . 92 ) connected state of the tensioning device ( 41 - 44 ) the side of the tensioning device, the individual to be brought by the tensioning device in the intended relative position items ( 2 facing the side of the tensioning device, adjacent to which the major part of the tensioning device holding device (FIG. 91 . 92 ) is located. Arrangement according to claim 1, characterized in that the arrangement is adapted to the individual parts ( 2 ) with the simultaneous use of several fixtures ( 41 - 44 ) bring in the intended relative position. Arrangement according to claim 6, characterized in that a plurality of jig movement devices ( 11 . 12 ; 11-1 . 11-2 ), each of which is a different one of the plurality of tensioning devices ( 41 - 44 ) into the position that you need to bring the items ( 2 ) must have in the intended relative position. Arrangement according to claim 7, characterized in that the plurality of jig movement devices ( 11 . 12 ; 11-1 . 11-2 ) are designed to handle the respective tensioning devices ( 41 - 44 ) at the same time to the positions required to bring the components ( 2 ) must have in the intended relative position. Arrangement according to claim 7, characterized in that on each jig movement device ( 11 . 12 ; 11- . 11-2 ) a separate jig holding device ( 91 . 92 ) is provided. Arrangement according to claim 1, characterized in that each jig movement device ( 11 . 12 ; 11-1 . 11-2 ) is designed to move only a single clamping device. Arrangement according to claim 1, characterized in that each clamping device holding device ( 91 . 92 ) for holding only a single clamping device ( 41 - 44 ) is designed. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the clamping device ( 41 - 44 ) by a top-mounted on the jig-holding device ( 91 . 92 ) in the intended position with respect to the jig holding device ( 91 . 92 ) can be brought. Arrangement according to claim 12, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) solely by a top-mounted on the jig-holding device ( 91 . 92 ) automatically in the intended position with respect to the jig holding device ( 91 . 92 ) can be brought. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) by a top-mounted on the jig-holding device ( 91 . 92 ) as intended with the chuck fixture ( 91 . 92 ) is connectable. Arrangement according to claim 14, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) solely by a top-mounted on the jig-holding device ( 91 . 92 ) automatically as intended with the chuck fixture ( 91 . 92 ) is connectable. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) by lifting from the chuck fixture (FIG. 91 . 92 ) is solvable. Arrangement according to claim 16, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) solely by lifting from the jig-holding device ( 91 . 92 ) is solvable. Arrangement according to claim 1, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) by lifting from the chuck fixture (FIG. 91 . 92 ) is removable. Arrangement according to claim 18, characterized in that the tensioning device ( 41 - 44 ) and the fixture holding device ( 91 . 92 ) are formed such that the tensioning device ( 41 - 44 ) solely by lifting from the jig-holding device ( 91 . 92 ) is removable. Arrangement according to claim 1, characterized in that a tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) is provided, by which the of the jig-holding device ( 91 . 92 ) held tensioning device ( 41 - 44 ) against another tensioning device ( 41 - 44 ) can be exchanged. Arrangement according to claim 20, characterized in that the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) a bridge ( 3 . 6 . 6 ) and at least one gantry carriage traveling on the bridge ( 31 . 32 ). Arrangement according to claim 21, characterized in that each gantry carriage ( 31 . 32 ) at least one z-axis which can be moved up and down ( 311 . 312 . 321 . 322 ) having. Arrangement according to claim 21, characterized in that each gantry carriage ( 31 . 32 ) two z-axes which can be moved up and down ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) having. Arrangement according to claim 22 or 23, characterized in that the arrangement is designed such that one of the z-axes ( 311 . 312 . 321 . 322 ) of the existing gantry carriages ( 31 . 32 ) just removed from the chuck fixture ( 91 . 92 ) held jig $ 1- 44 ) and another of the z-axes ( 311 . 312 . 321 . 322 ) of the existing gantry carriages ( 31 . 32 ) another tensioning device ( 41 - 44 ) to the jig holding device ( 91 . 92 ) brings. Arrangement according to Claim 24, characterized in that that which is currently in the clamping device holding device ( 91 . 92 ) held tensioning device ( 41 - 44 ) removing z-axis and the other tensioning device ( 41 - 44 ) to the jig holding device ( 91 . 92 ) z-axis z-axes of the same portal slide ( 31 . 32 ) are. Arrangement according to claim 24, characterized in that the arrangement is designed such that at the time, with the removal of the straight from the jig-holding device ( 91 . 92 ) held tensioning device ( 41 - 44 ) is started, the other tensioning device ( 41 - 44 ) already at the other clamping device ( 41 - 44 ) to the jig holding device ( 91 . 92 ) bringing z-axis is located. Arrangement according to claim 24, characterized in that the arrangement is designed such that the other clamping device ( 41 - 44 ) associated with bringing it to the fixture holding device ( 91 . 92 ) in the proper connection with the jig holding device 91 . 92 ). Arrangement according to claim 1, characterized in that the clamping device holding device ( 91 . 92 ) comprises a guide device through which a tensioning device ( 41 - 44 ) automatically to its intended position in relation to the fixture holding device ( 91 . 92 ) to be led. Arrangement according to claim 28, characterized in that the guide device is flared above, so that a momentarily lowered tensioning device ( 41 - 44 ) is almost captured by a funnel and directed / forced into the intended position. Arrangement according to claim 20, characterized in that the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) a tensioner bearing ( 7 . 8th ) in which one or more tensioners ( 41 - 44 ) be stored. Arrangement according to claim 30, characterized in that the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) in the jig bearing ( 7 . 8th ) mounted clamping devices ( 41 - 44 ) from the jig bearing and that just from the chuck fixture ( 91 . 92 ) held tensioning device ( 41 - 44 ) through the out of the tensioner bearing ( 7 . 8th ) to be retrieved. Arrangement according to claim 31, characterized in that the arrangement is adapted to the in the tensioner bearing ( 7 . 8th ) mounted clamping device ( 41 - 44 ) from the jig bearing before the jig ( 91 . 92 ) held tensioning device ( 41 - 44 ) by the fetched clamping device ( 41 - 44 ) must be replaced. Arrangement according to claim 31, characterized in that the arrangement is adapted to the in the tensioner bearing ( 7 . 8th ) mounted clamping device ( 41 - 44 ) to get out of the jig-bearing so early that the picking is completed before the jig-holding device ( 91 . 92 ) held tensioning device ( 41 - 44 ) by the fetched clamping device ( 41 - 44 ) must be replaced. Arrangement according to claim 1, characterized in that the tensioning device movement device ( 11 . 12 ) is manufactured in machine tool quality and the jig movement device ( 11 . 12 ) can thereby approach and maintain the respective desired position with an accuracy and a tolerance, as they can be realized with machine tools. Arrangement according to claim 1, characterized that the device to be produced by the arrangement is a motor vehicle body shell. Arrangement according to claim 35, characterized that the tensioning device is a tensioning frame, through which a Side wall of the hitherto completed body shell in the intended form as well as the intended position and the intended location in relation to the rest of the previously finished body shell can be brought. Arrangement according to claim 36, characterized in that for each of the two side walls of the body shell own tensioning device ( 41 - 44 ) is provided, and that the arrangement is designed to be carried out on the hitherto completed body shell using the two fixtures works at the same time. Arrangement according to claim 20, characterized in that the arrangement is designed such that it can also be used without the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) is able, during the manufacture of a device, the loosely assembled items ( 2 ) bring the device in its intended relative position. Arrangement according to claim 20, characterized in that the arrangement and the clamping device exchange device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) are formed so that the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) is a subsequently buildable extension. Arrangement according to claim 20, characterized in that the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) Contains components whose provision is optional, and the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) without the optional components, one of the jig-holding device ( 91 . 92 ) held tensioning device ( 41 - 44 ) against another tensioning device ( 41 - 44 ). Arrangement according to claim 40, characterized in that the optional components can be retrofitted expansions of the tensioner device ( 3 . 5 . 6 . 7 . 8th . 31 . 32 . 311 . 312 . 321 . 322 ) are. Arrangement according to claim 40 in conjunction with claim 30, characterized in that the tensioner bearing ( 7 . 8th ) belongs to the optional components. Arrangement according to claim 1, characterized in that the clamping device holding device ( 91 . 92 ) vertical columns. Arrangement according to claim 43, characterized in that on the columns ( 91 . 92 ) Connecting devices are provided, by means of which the tensioning device ( 41 - 44 ) as intended with the columns ( 91 . 92 ) is connectable. Arrangement according to Claim 43, characterized in that the tensioning device holding device ( 91 . 92 ) several columns per clamping device ( 41 - 44 ) contains. Arrangement according to Claim 43, characterized in that the tensioning device holding device ( 91 . 92 ) two columns per clamping device ( 41 - 44 ) contains. Arrangement according to claim 2, characterized in that the tensioning device movement device ( 11 . 12 ; 11-1 . 11-2 ) several carriages per tensioning device to be moved ( 41 - 44 ). Arrangement according to claim 47, characterized in that on each of the plurality of carriages ( 11 . 12 ; 11-1 . 11-2 ), which is to be moved per clamping device ( 41 - 44 ) are provided, a part of the relevant clamping device ( 41 - 44 ) holding fixture holding device ( 91 . 92 ) is provided. Arrangement according to claim 48 in conjunction with claim 46 or 47, characterized in that on each of the plurality of carriages ( 11 . 12 ; 11-1 . 11-2 ), which is to be moved per clamping device ( 41 - 44 ) are provided, one of the clamping device holding columns ( 91 . 92 ) is provided. Arrangement according to claim 47, characterized in that the plurality of carriages ( 11 . 12 ; 11-1 . 11-2 ) per fixture to be moved ( 41 - 44 ) are not interconnected and could in principle be moved independently of each other. Arrangement according to claim 2 or claim 47, characterized in that for the existing carriages ( 11 . 12 ; 11-1 . 11-2 ) is provided in each case a detection device, by which it is detected whether the relevant carriage and / or the part of the clamping device holding device provided thereon ( 91 . 92 ), and / or the clamping device held thereby ( 41 - 44 ) in the position in which they must be, so that through the carriage ( 11 . 12 ; 11-1 . 11-2 ) moving clamping device ( 41 - 44 ) is in the position that you need to bring the items ( 2 ) must have in the intended relative position. Arrangement according to claim 51, characterized in that a control device is provided, which is adapted to stop the drive of a respective carriage when it is detected by the associated detection device that the arrangement component whose position is detected by the detection device, reaches the position in which she must be, so that the sledges ( 11 . 12 ; 11-1 . 11-2 ) moving clamping device ( 41 - 44 ) is in the position that you need to bring the items ( 2 ) must have in the intended relative position.