DE1916806A1 - Method and device for changing rolls in a rolling mill - Google Patents

Description

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• Bahrpalente Hern · PATENTANWÄLTE Babetzpat Munich

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Bayrlidi · Verainibank Munich 952287 Drsidnar Bank AG Hern · 202434 Poiticbaddcontp Dortmund 558 & 8

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ISHIKAVAJD4A-HAHIMA JUXOGIO EABUSHIEI EAISHA _f 3) olcyo-to, JAPAN

"Procedure and device for the orphan change of a

Rolling mill "

The invention relates to a method and a device for changing rolls in a rolling mill.

In contrast to the rolling of sheet metal and steel of more general shapes, vertical rolling must be in addition to horizontal rolling oeim the rolling of Η-profiles. Di © s does such a thing In addition, the rolling mill must of course be complicated the horizontal rollers should be replaced when a product of a different size is to be rolled wtxd®n.

Vm. To shorten the time "which is necessary for such a roller change, and to increase the performance of the plant" has been developed so far for changing the rollers. One of these methods is the one which, in the early stages of the Walzwerk® for Η-profiles

00 9810/0399 bad original

is and turns which kit works by crane to like & s rolling mill roll change ziuD raise. This process worked satisfactorily as long as only rolled products of small dimensions were required from the Harkt; Here it was possible to lift each roll stand using a crane to change the rolls. This method has proven to be impractical and uneconomical in the past few years anyway 1 since the length of the rolled product is now up to 1000 mm and the weight of the roll is 15 tons, that of the roll stand even exceeds 500 tons., For these reasons, the following two methods have mainly been used. In this process, the rolls and the roll chocks are pulled out or lifted out of the roll stand to replace the rolls »

Bas one of these two procedures is intended _? to change the horizontal rolls immediately, since the horizontal rolls have to be changed far more often than the vertical rolls when in operation pulled out or inserted into the roll stand; The replacement of the Tertikaien waltz takes place with a C-hook or another special wire rope clamping device. Tuck;? WeehseleinspaHETOÄieJatraiig Is special design is used after the horizontal rock © a in the housing has been lifted according to the figures 7 and δ, the Terticaien W & lssea c and d valued Ms see below the Stell © sram exchange using a bucket special device wß.g®fa ®la® & _$ an-. The interchangeable chipboard device is closed in i @ m. X ^; JsIs © a = ~, stand introduced after the position of this Weehseleia · = SpannTorrichtung Mittel® © iaer © ©! Equals or sliding. Mfe -.- nrag g- and ti © ¥ © sMmiäung with the Tertikal @ a kerg @@ t @ llt wurä.® ₉ so & sM üle vertical roller c on

the Tertical WelsQ S. on the drive side 009810/03 99

BATH ORIGINAL

can be pulled out separately on the Hollentisch f

The other process orders in it, both the horizontal ones how to exchange the vertical orphans at the same time, while scaffolding the horizontal and vertical orphans inside be installed on the slide and these in the outside The framework can be pulled out or inserted into it. These The usual Yeirfahren such as the whale scaffolding substitution have the following Xoch parts:

(1) - They are uneconomical because there is an extra framework for replacement, the Yalasen must be prepared *

(2) - They are uneconomical because a large crane capacity is required to heal into the roll stand »what to a great maritime office size, both of the building and of Iran leads.

(3) - How you work when storing or removing the Roll stand from Yalzenstrasse is tedious.

(4) - Me & r5Be des ¥ alzenetänders must by capacity of the crowns are limited.

(5) - In the case of the type in which the roller stand, the one with the the rolls to be replaced is equipped, must be pulled out and transported to the roll factory and the rest of the frame, in which the new orphans have already been employed and in the Roller factory has been set up, the positions of the horizontal and vertical rollers in the roller train must be readjusted.

The second approach, which works with a C-hook or a special design clamping device, also shows the Disadvantage that the Arbeltswelse is complicated that a Considerable things can be done in handling the jig in special design or the C-hook is required and that a crane must necessarily be used.

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BATH ORIGINAL

The other method, the bit works on the inner rolling frame ■ "offers the following components'

(s) - A remainder in the & eree scaffolding wheel © in Sehlitten gnaa Ims = change ctes orphans should be provided? . ■■ '"■"'

(b) == ■ eka the length of the lined framework is fixed eier Äfestssäl between the sawing of the horizontal W @ 2s @ a © bun = » if firm? - - .-. '.. ■ ■, _

(e) »the furthest scaffolding ©! must naeh iaat © a ¥ @ ^ Ilag © Et or üe Yossiclitiing ziaa Insteilen ä © r Yöstikalea I? ®1s © b atai _: enthQsat weräeBg da di @ upper wheel mt © £ QB ifelz © n imfi .i ± @ t @ s = vertical roller »al © stacked on top of one another" ®infi _p Kittels fi © s slide pulled out or © ing @ fütet weränen Hiss © a ₉ ä®T ia rope dee Eeneters äee & ehäu @ e © "^ @ γ ^ 9 © θΙι © β "i @ t | ('■■■ - the possibility of all h © rigOBtal © n orphans mll®ia © 2-aweehsel» !, weä not considered.'

A ride. besides the

also applied. J) i @ this method! Consists of upper and lower horizontal rolls and tertical a ¥ alg © &. sueaajsen be put on a cart _? äi © Torricht ^ ag % wm. instal the vertical rollers to the side and support the taps for the device for adjusting the vertical rollers, thereby facilitating the passage of the vertical roller; It is then a carriage provided to these horizontal and vertical rollers to push to the side and replace it as the horizontal and vertical orphans through new · However, this method is disadvantageous in many respects.

(1) - Since both the horizontal and the vertical Wals®n have to be exchanged internally at the same time? it is not possible igt alone © replace the horizontal rollers while the vertical rolls expectant left in tact @ _'s

(2) - Ss is necessary to move the supporting webs for you vertical roller, which is the main tension force, the & n £ the

0098 10/0 3 99

vertical rolling is exercised, must withstand;

(3) - The distance between the centers of the bearings for the horizontal roller is fixed because of the carriage on which both the horizontal and vertical rollers are placed be loaded at the same time. For this reason, when products with a wide range of dimensions are to be hardened, an extra length is also required to be given to the body of the horizontal roller.

According to the invention, a new method for replacing the rollers is now to be proposed in which these disadvantages of the conventional methods, as described above, do not occur. The invention relates to a method and a device for changing the roll of a rolling mill, in which the upper and lower horizontal rolls and the vertical rolls are contained in a housing and in which the upper and lower horizontal rolls are rotatably supported on their bearings by means of chocks and mounted on the lower and upper whale beams, which can be moved vertically with the vertical adjustment device. According to the invention, while the vertical rollers are rotatably supported on the bearings by means of the chock © sitting on the lateral cross rail, they can be moved vertically by means of this cross rail which is moved vertically by the hydraulic cylinder located at a suitable Stell® on Housing is attached and can also be moved horizontally using the horizontal © adjusting device; If the rollers are exchanged, the vertical rollers are set up in a horizontal and vertical position and arranged on the chocks of the umter @ n horiseatal Wals® in such a way that the vertical rollers are introduced together with the horizontal roller can be fl & rt by the upper and lower lioEliSöntalexä, rollers from the working side clss Waljstisches her- © iagefttat © isa? be pulled out köimea. The upper and ¹ ^ sehieaea on the working rope are wtei * one

008110/0399

ORIGINAL BATHROOM

right winding to the rolling train of the rolling mill and below *. arranged at a suitable distance from the housing, which is movably arranged on one side or sliding displacement device of the slide rail wheel of the housing at right angles from the slide rail. The new horizontal and vertical spare rolls are placed on the SeitenverscMebungseinricfrtiimg initially ⁰ by means of the import and puller for AEIE roll, which are movable along the guide rail and the S © I ^ enverschiebusgsvorrichtung "The worn horizontal and vertical rolls are sucked out from the Gehämss and the side shifting device g @@@ tzt ₉ the new horizontal and vertical rollers are introduced, which were previously put on the side shifting device ^ next the side shifting device © is inserted into the housing so that it is moved so that.äi © ¥ © Rsellisseneii horizontal and vertical rolling ia the "position would be shifted ₉ di® asr TarliageEiaag der G-leitechiea © © ntsprickt ₉ Weian die limfülir« = umä Aufgiehvorrichtime, for Äi © Wala © m im «ine desired © Lag © räekge @ t © llt! The worn; äosizonralaa and vertical rolling are on the sliding rails by means of the pull-out = how the introducer is pulled »

The method for replacing the rollers xmd the 'To2 3? Iclitung for implementing this method will now aahant example "embodiment with reference to the drawings will be explained in more detail, with di © Anwendiang £ UEX the Pail" of Walseaa of steel H-section shown is _β

Show in the drawings

and 2 soliematically a Walswerk with the Walzenwsefc = »

according to the inventor di @

3 Isis β give scfe®sa ©, tlsefe © S-esamtdarstellimgen mm Aiaswaehsela & @ s Wsls © a, © ines rolling mill

0098 10/0399 "BATH _{0 FIiGiNAL}

7 land 8 of the S «i © lsaiiagsn explain the usual yer-

Fahreii aias changing the rolls äea Walzwerk®® «=

The scaffolding 15 and others 16 with windows läagiicl?. @ N are arranged vertically on the side of the building ¹ , imä ti © © bere horizontal orphan 1 waä the under © && 7izontale "roller 2 are Oberhall) and untexiaaUb in the üemstertell lieser G-eMat® 15 uad 16. The üagerzapien tile ^ © Iseren 'horizontal Walsse go to

Working rope © X xsmä. ζ, ίάτ J ^ -feriefesseite Y ₅ , where tie Ifage ^ img in store 3 ^ srni. 5 ^s using fi © r Eiafesaastaeke 5 and 6 takes place · This built-in sieve 5 ws & 6 3isS connected with iron ¥ alsfealk © a 9, the at ^ atesesa Sad © ait -Sefesmläspinaela 11 imi 11 'on the work elasai. .Mtrielbsseits -g-esaeMea is, these MSOE vertically by means Hrnttsm 15 15 ^s are Isweglicii, "© fii fixed aa-15 to Sehäusen TSMI. 16 aitsen. BL® © Isere hoiraontale orphan 1 is vertically ssnsaiaineia with the beam 9 and the Einbaustücksn 5 and 6 cLiircii the YertikaUfswagang OCE Spiadeia 11 w ä 11 ^f moved, this VertikaXbewegimg ^ sam ^ sarsh Anstellvorrichtimgen 31 and 31 -Be set '. In Uiailialaer Weis © sini you bearing journal of the lower horizontal WAIS ^ ₉ to work and intriebsseite extends, bearings 4 and 4 * rotatably mounted by means of the mounting pieces 7 and 8. These mounting pieces 7 and 8 are arranged on the top of the carrier 10, which are mounted on the upper end of the lead screw !! 12 and 12 *, which are mutually aligned move vertically by means of the nut: m 14 and 14 ^f , which are firmly connected to the stands 15 and 16. The lower horizontal roller 2 is moved vertically together with the roller beam 10 and the components 7 and 8 by the vertical movement The spindles 12 and 12 »move.

The vertical rollers 17 groove 18 on the working and drive sides are adjustable between the horizontal rollers 1 and so arranged that their lotation waves in the plane that going through the upper and lower horizontal roller bearings. As Sigor 2 shows, the vertical roller 17 is on the

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BATH ORIGINAL

The working side is mounted in the chock 21 by means of a shaft 20 and a bearing 19, the chock 21 is on the top the lateral cross rail 25 is arranged, which is supported on its lower part by a hydraulic cylinder 28, the is firmly connected to the housing 35. The vertical roller 18 on the driven side is in the chock 21 'means the shaft 20 'and the bearing are supported in the same way as the vertical roller 17 on the working side. Both vertical Orphans 17 and 18 are mounted in such a way that they can be moved vertically with respect to the frameworks 15 and 16. They are like that too stored that they edge in the horizontal direction with respect to the frame 15 and 16 by means of the adjusting devices 29 30, the screw spindles 22 and 22 'and nuts, dleJLn the drawing are not shown and hooks 23 and 23 'are carried. A part 27 is arranged in such a way that it moves in the passage of the lateral cross rail 25 by means of the hydraulic cylinder 26 can be stored, whereby the lower part of the lateral cross rail 25 is stored · This part is moved when the position of the vertical rollers 17 and 18 has been set in order to secure the lateral cross rail 25 to the stands 15 and 16. When the cross rail 25 is lowered by the hydraulic cylinder 28, the vertical rollers 17 and 18 become simultaneously lowered because they sit on the lateral cross rail 25 and finally on the chocks 7 and 8 for di® lower horizontal Roller 2 stored.

On one side of a rolling train of the rolling mill (left working side According to Figure 1) a slide or side rail 35 is arranged at a suitable distance from the stand 15 and in the direction normal to the rolling line of the rolling mill; these Slide rail 35 is used to slide the lower horizontal roller 2, the top of which is essentially the has the same height as the top of the roll bar 10. In a desired position directly above the slide rail 35 is the slide 34 for moving the upper horizontal

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Roller 1 is provided, the space between the slide rail 54 the frame 15 is slightly larger than between the slide rail

and the scaffolding 15. '

An insertion and removal device 56 ait rotatably mounted Jaws 43 and 44 at the end are provided and designed so that the upper horizontal roller 1 is inserted and pulled out; the lower horizontal roller 2 is arranged on the slide 35 so that the device is driven by the drive means can be moved, causing the upper and lower horizontal rollers 1 and 2 to slide. Between the scaffolding 15 and the slide rail 35, the rails 59 and 40 are provided in a direction normal to the slide rail 35 and one Sliding device 57 sits on a rail surface 42 or 42 ', the height of which corresponds to that of the slide rails 54 and 55, is movably arranged on Sen rails 59 and 40, sliding displacement means 57 in the direction normal to slide rails 34 and 55 by means of of the hydraulic cylinder 58 is movable, the parallel to the rails 59 and 40 is arranged. The upper horizontal roller 1 and the lower horizontal roller 2, which are on the slide rails 54 and 35 are slidable, slide by means of the import and removal device from the sliding surface 42 'and 42 of the displacement device 37 to the sliding surface 9 * of the beam at the window of the stands 15 and 16 and the change rail 35. Also the upper horizontal roller 1 and the lower horizontal one Roller 2 is positioned on the window and opposed on the rails 54 and 55 by means of the sliding surfaces 42! and 42 of the side shifting device 37 is moved. The gate direction for changing the rollers of the invention has the above features. The vertical rollers 17 and 18 are in a suitable position on the chocks 7 and 8 dtr lower horizontal bee 2 by means of adjusting spindles 22 around 22 * btwegt, driven by the action of the horizontal adjustment drives will; then the wedge

OOSS10 / 0399

.. ■ ■ 1

- ίο -

moved by the hydraulic cylinder 26 to the outside ₉ s © äaB the side cross rail 25 by the hydraulic cylinder 28 by a full stroke dee hydraulic cylinder is abgesenlrl ι the vertical rolls 17 and 18 are albgesenkt simultaneously and placed on the side © cross rail 25th So weräem € ie the undersides of chocks # 21 and 21 ^f , which are the vertical. Rolls 17 and 18 encompass housing-like, mounted on the upper sides via chocks 7 and 8 of the lower horizontal roller 2? after the cross rail 25 has been lowered a desired amount.

The upper and lower horizontal rollers 1 and 2 are then raised to the desired change position bssv. lowered, namely the position, which corresponds to the sliding surfaces 42 ″ and 42 of the lateral displacement device 37, and. swar by means of "the spindles 11 and 11 'and 12 or 12 · and the beams 3 ma 10, which are driven by the action of the adjusting devices 31 and 31 ^f Tssm« 32 and 32 ·, whereby d ⁴ e vertical Walesa 17 and 18 The upper horizontal roller 1 is supported on the sliding surface 9 * of the beam 9 and the lower horizontal roller 2 as well as the vertical Falsea 17 and 18 are also placed on the interchangeable rail 33 that is eimgelaaut in the bar 10, "supported Eb is therefore possible to the upper Imae umtsren horizontal rolls 1 and 2 to replace" wciTsei gleielizsitlg the vertical rolls 17 and 18 replaced Varies

Bas procedure for replacing the rollers after the is described below with reference to the Piguren 3, 4 »5 sffld 6

will. > - - ^f

In © represents Walznnbearbeitungshall waräem first the new upper and lower - & © risontalen orphans and DI® new vertical Walg © Jir intended ersetsen the old mu £ the 12nd Oleitschienen 34 to 35 d © yes Steep A country B aag® © rdB. © t »Bi © Eiafülnnings— and out =

009810/0399

Pulling device 36 for the rollers is brought into position &.

Then the slide shifting device 37 is pushed onto the rails 59 and 40 by the hydraulic cylinder 38 so that the center can be shifted from the position E, 1 to the position S.E. The insertion and withdrawal device 36 is moved on the slide rail 35 by the drive device 4-t together with the drive device itself. The new lower horizontal roller and the new vertical rollers are slid on the slide 35, while the Heil to which the jaws 43 and 44 are attached is between the position & and the position H and the new upper and lower horizontal rollers and vertical rollers are shifted, while the fastening part for the jaws 43, 44 is located between the position Ξ and the position I on the rails 34, 35, so that these are finally placed on the side shifting device 37 in the position D, E. The central part of the side shifting device 37, which carries the new horizontal rollers and vertical rollers, is moved from the position D, E to the position C, D and the insertion and extraction device 36 is guided by the guidance of the drive device 41 on the sliding surface 42 of the lateral displacement device 37 until the part to which the jaws 43, 44 are attached, is moved from the position I to the position J. The jaw 43 is hooked into the upper chock 5 for the upper horizontal roller 1 and raised by the vertical adjusting devices 31 »31 * and the jaw is hooked under the chock 7 for the lower horizontal roller 2, which is lowered by the vertical adjusting devices 32, 32 * will. If the jaws 43, 44 are correctly attached, the drive device 41 is set in rotation in the opposite direction, as a result of which the insertion and extraction device 36 is reset in such a way that the part to which the jaws 43, 44 are attached moves out of position 3 in position I is reset. The upper and lower horizontal rollers 1 and

009810/0399

and the vertical rollers 17 and 18 together with the chocks 5, 6, 7, 8, 21 and 21 * become in the position L and are pulled onto the side shifting device 37 set. Then, after jaws 43 »44 are removed from chocks 5 and 7, the side shifting device 37 on rails 39 »40 from position C, D, returned to the position D, E by the hydraulic cylinder 38. Then the jaws 43 »44 are attached to the chocks for the new upper and lower horizontal rollers hooked up previously on the side shifting device

"and the insertion and extraction device 36 is moved again by the drive device 41 from position I to position J. The new horizontal and vertical rollers on the side shifting device 37 are thus moved from position L to position £ together with the chock After this insertion is complete, the jaws 43, 44 attached to the end of the infuser and extraction device are removed from the chocks for the new upper and lower horizontal rollers and the infeed and outfeed device 36 is rotated in in the opposite direction of the drive device, so that the part ₉ to which the jaws are attached is moved from position J to position I. The lateral displacement device 37 is again moved by the hydraulic cylinder 38 from position D, E into position C, D moves and the jaws 43, 44 at the end of the insertion and removal Guide devices 36 are hung on the chocks 5-7 for these upper and lower horizontal rolls to bring the upper and lower horizontal and vertical rolls from the side shifting device 37 to the roll manufacturing facility, these rolls being pulled out onto the side shifting device 37. The infeed and outfeed device 36 is further returned from the position I to the position H by turning in the opposite direction of the drive device 41 and the upper and lower horizontal

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Talen rollers and vertical orphans are transferred from the side shifting device 37 to the slide rails 34 »35 and moved from the L position to the A position. The jaw 43 for the upper horizontal roll is removed from the chock 5 in the central position A of the roll, while the lower horizontal rolls and the vertical rolls are returned from position A to position B by the infeed and outfeed device, jaw 44 is released from the chock 7 when the cable of the lead-in and lead-out device to which the jaw 44 is attached is moved from position H to position G. The upper and lower horizontal rollers and the vertical rollers are transferred on the floor in the central position A, B of the rollers by means of the overhead Iran and are serviced here. When the upper and lower horizontal rollers and vertical rollers are transferred from the side shifting device 37 to the slide rails 34, 35 and when their centers are shifted from the position "L to the position A, the side shifting device 37 is moved onto the rails 39» 40 by means of the hydraulic cylinder 38, as a result of which their centers are shifted from position 0, D to position E, P and they are prepared for the rolling process and the part of the infeed and outfeed device to which the ack is attached is reset from position J to position I. Now, to determine the position of the roll in the roll stand, the positions of the lateral cross rail 25 and the vertical rails 17, 18 set where the hydraulic cylinder 38 see upper limit when the lateral Qu appeared 25 is raised by the hydraulic cylinder 28, whereby the vertical rollers 17 »are raised together with the chocks 21, 21 'and the lateral® cross rail 25 is attached to the frames 15» 16, with the cell 27 by the hydraulic cylinder 26

009 810/0399

is operated. Then the top and bottom become horizontal Rolls 1, 2 by means of the bars 9, 10 through the spindles 11, raised or lowered by the vertical adjusting devices 31, 31 'or 32 and 32, whereby the entire replacement process is finished.

In addition to the above-mentioned Ausfünrtmgsformen If it is of course possible to lead out the horizontal rolls and vertical rolls, or to introduce at the operation side at the same time by the vertical orphan W zusaassen be raised with the bearings and Einbauetücken means of Seitenqueraohiene 24, and this sucked to the Artteitsselte by using the sliding surface 9 ¹ for the upper horizontal roller 1.

As above, in the application of the method sum AusweeliseXn of the rolls of a rolling mill and apparatus sur Surenfülming this method according to the invention *> ESEH% elieB _s & b possible products such breitflanschige carrier of large dimensions, smaller carrier and steel with particular Irofilformen feei optimum wavelength thereby reducing the cost of the rollers and improving the accuracy of the products. In addition, it is from Torteil compared to the usual internal frame changing system that the horizontal rolls can be changed easily by themselves ». Sa the two verti & View Wal "zen to work side are pulled sower may select from the operating side with the upper and lower talen rolls can be introduced, the transition easily and accurately performed» Sa. the entire Walzenwelchselvorgang device by means äex alone is carried out and a crane is not necessary ^ »the crane can be used to replace you Mhnmg and the saw blade, etc., or scarcely IMT servicing of other MasQfeiaen be used, making the! Since is reduced to a Minfamm required _e üb the rollers to

00 9 8 10/0399

switch; the working efficiency of the entire rolling mill is so increased. Sa also, after the roll change, the rolls pulled out of the stand by the roll changing device can be moved from the rolling hall directly into the neighboring roll workshop, the process can be simple and can be done quickly. Another advantage of the invention is to be seen in the fact that it is not necessary that Make the window high or remove the vertical roll adjustment device, as there is an internal stand changing system the rolling mill constant can be made larger.

Claims

0098 10/03 99

Claims (2)

M 01 330 PATENT CLAIMS 1. )) A method for changing the rolls of a rolling mill with upper and lower horizontal rolls and vertical rolls within the stands, characterized in that the chocks are suspended and rotatably mounted that the upper and lower horizontal rolls by means of the bearings on the upper and lower beams, which are vertically movable by the upper and lower vertical adjusting devices in the stand, are supported that storably the chocks of the vertical rolls are placed on the chocks for the lower horizontal roll so that the vertical rolls in and out together with the lower one horizontal roller are moved, while the upper and lower horizontal rollers are introduced and taken out from the working side by vertically moving the chocks for the vertical rollers by vertically moving the chocks for the vertical rollers by means of the cross rail, which is vertical by the action of the Cylinder is movable, which is attached to the desired location on the scaffolding, and that the chocks for the vertical rolls are moved horizontally by means of the horizontal adjusting device, that slide rails are provided on the working side in the direction normal to the working line and at a suitable distance from the scaffolding that a side shifting device is movably arranged between the slide rails and the stand in the direction normal to the slide rail, that the new horizontal rolls and vertical rolls are arranged on the side shifting device with a device for inserting and removing the rolls which are on the slide rail and the Seitenvers cliebungs device are movable, and that then the horizontal and vertical rolls to be replaced in the stand are pulled out on the side shifting device and the 009810/0399 Side shift direction is moved that in the scaffold these new horizontal rollers and vertical rollers are introduced previously placed on the side shifting device were and that the side shifting device is moved again so that the rope on which the horizontal and vertical rollers to be replaced are placed, the slide rails are extended when the insertion and Lead-out device is returned to the desired position, whereby the horizontal rollers to be replaced and vertical ones Rollers can be pulled out onto the slide rails. 2.) Device for changing the rolls of a rolling mill with upper and lower horizontal rolls and vertical rolls in the stands, characterized by chocks that support the upper and lower horizontal rollers by means of the bearings, the chocks being suspended and supported so that they are vertical on the upper and lower roll supports through the vertical Adjusting device are movable, which is mounted at a suitable location on the scaffolding, with the chocks for the vertical Rollers are mounted on the cross rail and are vertically freely movable through the cylinder, which is attached to a suitable Place of the scaffolding is stored and vertically movable by the horizontal adjustment device, with the chock for the vertical rollers are supported on the chocks for the upper and lower horizontal rollers so that the vertical rollers lead in or out on the working side while the horizontal rollers are drawn in or out on the working side, and the Rails for sliding the upper and lower horizontal rollers at the desired heights on the working side in the Direction normal to the working direction are provided with a suitable tree provided between the rails and the scaffolding is; by a side shift device, which is driven by the cylinder or other drive shaft in the direction is arranged to be movable normal to the slide rails, wherein 0098 107039 9 chi enen the Seitenverschiebirngseinriehtung between the slides and the frame is supported in such a way that the sliding surface is at the same height as that of the sliding rails, whereby both the new and the upper and lower ones to be replaced horizontal rollers and vertical rollers are included and the positions of the upper and lower horizontal Rolls and vertical rolls with respect to the slide rails and the stand are changed; and through a facility that movably provided by the drive means to the se upper and lower horizontal rollers on the sliding or Inserting or pulling out the side rails and the side shifting device, the changing of the rollers being carried out by moving the side shifting device together with the movement of the insertion and withdrawal device is carried out. x-x-x-x-x 00981070399