DE8524014U1 - Device for forming sewer shafts - Google Patents

Description

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PATENT ATTORNEY D'f P LV-P H YS/ ¹ DR ₁ ¹¹ HERM ANN FAY

Baumgärtner GmbH & Co. Maschinenfabrik KG
Dr. Georg-Spohn-Str. 31
7902 Blaubeuren

7900 Ulm, 14.08.85 File PG/6665 f/sr

Device for forming sewerage shafts.

The invention relates to a device for forming in front of sewerage shafts with at least two connecting sleeves for sewer pipes, consisting of wall filling parts and connecting molded parts that form cylindrical ring sectors in plan, which together form the mold shell and are inserted in the circumferential direction in abutting and displaceable manner in an outer mold that is circular in plan, as well as a mold core arranged coaxially in the mold shell, which together with the mold shell forms a mold space that corresponds to the shape of the molding and is crossed by inserts that are attached to the connecting molded parts, the angular position of which relative to one another can be changed by one or more of the wall filling parts being able to be moved from one of the circumferential areas of the mold shell located between the connecting molded parts to the other circumferential area.

Address! PO Box I767,7900 UfnvDonaU Telephone/', '.'" ,"rdigräitime"» »&iacgr; S Postal Check Account Dankkonlo

finsInjersIfaOeil (0731)6,49*4^ ***« JIoJ(ViIUlWötiaU *. M. Stuttgart 73231 Deutsche Bank AOUlm 184671

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Such a device is known from the literature reference "Betonwerk + Fertigteil-Technik" Issue 3, 1977, p. 157. By appropriately moving the wall filling parts, large angle changes are possible between the connecting mold parts in steps corresponding to the central angle of the moved wall filling parts related to the mold axis, whereby wall filling parts with different central angles are provided for the field gradation, of which the wall filling part with the smallest central angle determines the smallest possible angle change. A continuous angle change is not possible.

Such a stepless angle change is made possible by a device known from DE-PS 27 23 579, in which the connection moldings are provided on both sides with a flange extending in the circumferential direction and one-piece wall segments are provided between the flanges of adjacent connection moldings, the circumferential lengths of which enable angle changes of the connection moldings relative to one another, whereby each wall segment has cover strips projecting in the circumferential direction over its outer edges, which overlap the flanges on their outer sides and thereby close the mold space between the flanges and the wall segments to the outside. However, the mutual fixing of the connection moldings and the wall segments is cumbersome here, which can be achieved, for example, with a base plate and a

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at the height of the upper opening edge of the
Furthermore, it is possible to screw on a larger mounting plate arranged between the moldings.
Angle changes between the connection fittings

essential, a larger number of wall segments |

with correspondingly different central angles i

to be available. 1

The invention is based on the object of |

Device of the type mentioned above to be designed in such a way that

that stepless angle changes between the f

Connection fittings can be made easy. |

This object is achieved according to the invention by |

solved that in both between the connection form- 1

parts of the peripheral areas of the mold shell |

Each of the wall filling parts consists of two circumferential J

direction of the mold shell against each other |

able fittings which can be used in displacement |

direction and with a drive device |

for mutual adjustment in guide direction |

are provided, each fitting having a |

Form space delimiting mold wall and |

the adjacent mold walls of both molds |

pieces to at least their mutual adjustment j

area overlap in the circumferential direction. |

The invention achieves that the f

Continuously variable mutual adjustment of the fittings §

the connection fittings have a corresponding stepless I

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undergo mutual angular adjustment, whereby the shaped pieces of the wall filling parts, which can be changed with regard to their central angle, are adjusted in opposite directions to one another in the two peripheral areas of the mold shell in such a way that the increase in the central angle of one wall filling part is equal to the reduction in the central angle of the other wall filling part. The drive device in the adjustable wall filling parts also makes it possible not only to adjust their shaped pieces against one another, but also to move all the other wall filling parts and at least one of the connecting shaped parts in accordance with the desired change in angle in the peripheral direction of the mold shell within the outer mold, particularly when one of the connecting shaped parts is fixed in the outer mold and can serve as an abutment for this displacement movement.

In principle, it may be sufficient to guide the molded parts on the outer mold and, if necessary, on their adjacent mold walls. In a preferred embodiment, however, the molded parts are guided together in such a way that at least one guide rod is provided on one molded part within the wall filling part and guide receptacles for the guide rod are provided on the other molded part. Of course, there is the possibility, especially in the case of wall filling parts that are high in the direction of the mold axis, of

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the height above one another, several such guide rods and associated guide receptacles are provided in order to prevent mutual tilting of the molded parts. According to a further, particularly advantageous proposal of the invention, the &Agr;&tgr;&idigr; + &tgr;*·! öl·* &ogr; ö 4 &eegr;&ggr;*·&idigr;&lgr; Vi 4*i in tr -in Aav* A mr\ 7^&eegr;+&ngr;«·&iacgr; **tA viI^äT A^a

The adjustment direction of both molded parts, which increases the width of the wall filling part, serves as a clamping device, by means of which all wall filling parts and the connecting molded parts within the outer mold can be clamped against each other by pressure in the circumferential direction. Further fastening measures between the wall filling parts and the connecting molded parts on the one hand and the outer mold on the other hand are then unnecessary. In addition, it is sufficient that the central angle of the adjustment area of both molded parts relative to each other is at least equal to the central angle of the narrowest of all wall filling parts in the circumferential direction of the mold shell. The continuous angle change then takes place in the area of this adjustment area, while larger angle changes can easily be implemented by moving the wall filling parts, which cannot be changed with regard to their central angle, from one circumferential area between the two connecting molded parts to the other circumferential area.

-With regard to the drive device for the molded parts, various embodiments are possible within the scope of the invention. A preferred embodiment is characterized in that the

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Drive device consists of a drive spindle mounted axially immovably on one molded part with a spindle nut, the adjustment movement of which along the spindle axis is converted directly or via a gear into the adjustment movement of the two molded parts against each other; In particular, it is possible to arrange the drive spindle essentially tangentially to the circumferential direction of the mold shell.

to be kept in a warehouse that is designed for forming I

axis parallel axis rotatable on one fitting &psgr;

is mounted, and the spindle nut is also connected to the other molded part so that it can rotate about an axis parallel to the mold axis. Another very practical and favorable embodiment with regard to the accessibility of the drive spindle from the outside is characterized in that, when the drive spindle is arranged essentially radially to the mold axis, it is held in a bearing which is mounted on one molded part so that it can rotate about an axis parallel to the mold axis, and that the spindle nut engages a drive lever of an adjustment gear acting between the two molded parts so that it can rotate about an axis also parallel to the mold axis. In this case, the drive lever can be mounted at one end of the lever on the molded part which also supports the drive spindle so that it can pivot about an axis parallel to the axis of rotation of the spindle bearing and can engage with a guide piece in an adjustment guide on the other molded part, whereby the course of the adjustment guide can be changed.

The distance between the two molded parts is increased when the drive lever is pivoted. It is also possible for the drive lever to be a toggle lever, which is mounted with its pivot axis in the lever knee, parallel to the axes of the spindle bearing or spindle nut, on the molded part that also supports the drive spindle, and with one lever arm connected to the spindle nut, and with the other lever arm, each rotatable parallel to the axis, to a pull and push rod that is also rotatable parallel to the axis on the other molded part. In particular, the lever arms forming the toggle levers can be seated in a rotationally fixed manner on a shaft that is rotatably mounted on the molded part and can be arranged at a distance from one another in the axial direction of the shaft. This design is particularly recommended for mold shells that are high in the direction of the mold axis. In this case, the shaft can extend over the height of the wall filling part and, when adjusting the molded pieces relative to one another, enable the adjusting force to be applied to the molded pieces in a largely uniform manner over the height. Another, also very advantageous embodiment is characterized in that, when the drive spindle is arranged essentially parallel to the mold axis, the spindle nut engages one lever arm of a toggle lever which is mounted on the molded piece, which also supports the drive spindle, so that it can rotate about an axis perpendicular to the spindle axis, and whose other lever arm can be rotated parallel to the axis on a lever which can also be rotated parallel to the spindle.

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on the other molded part is connected to a pull and push rod mounted on the other molded part. Here there is the very advantageous possibility of providing several spindle nuts running in the same direction along the drive spindle and assigning each spindle nut its own toggle lever and its own pull and push rod. Obviously, this design is also particularly suitable for wall filling parts that are high in the direction of the mold axis, since the spindle nuts with their toggle levers and pull and push rods can be arranged one above the other in several in the direction of the height of the wall filling part. In yet another design, the two molded parts are connected to one another in their adjustment direction by a scissor gear, with two of the scissor levers being rotatably mounted on the opposite molded parts and the other lever ends being rotatably connected to two spindle nuts, which rotate in opposite directions on a drive spindle that is aligned perpendicular to the parallel lever rotation axes on one or the other molded part. This design is particularly recommended for wall filling parts that are low in the direction of the mold axis, because the drive spindle can then be aligned radially to the mold axis and is easily accessible and operated from the outside. Instead of a drive spindle, the drive device can also consist of at least one hydraulically or pneumatically operated device arranged between the mold pieces and effective in their adjustment direction.

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The

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Cylinder-piston arrangement. The cylinder-piston arrangement can be acted upon from both sides, so that it is possible to pull the two molded parts closer together or push them further apart.

In the following, the invention is explained in more detail using embodiments shown in the drawing; showing:

Fig. 1 is a plan view of a device for forming sewer shafts according to the invention,

Fig. 2 is a section in direction II - II through the object of Fig. 1,

Fig. 3 is a horizontal section through one of the wall filling parts of the device according to Figs. 1 and 2, which are adjustable in terms of their central angle,

Fig. 4 is a side view of the object of Fig. 3, wherein Fig. 3 shows the section A-B shown in Fig.

Fig. 5 shows the section C-D through the object of Fig. 4,

Fig. 6 to 9 show different embodiments of the

Wall filling part in a representation corresponding to Fig. 3,

Fig. 10 shows a further embodiment of the wall filling part in a representation corresponding to Fig. 4.

The device shown schematically in Fig. 1 and 2 consists in detail of a base plate 1» which with its outer edge 2 and an axially above it

arranged mold ring 3 forms an outer mold 4, into which a mold shell, generally designated 5, is inserted, in which a cylindrical mold core 7 is located coaxially to the mold axis 6, which, together with the mold shell 5, forms a bottom-

\ denring 8 forms a closed mold space 9. This

Form space is only indicated by dashed lines

\ Inserts 10, which are connected to connection fittings

11, which are used to create two connections for sewer pipes. These two connection mold parts 1*1 together with wall filling parts 12, 13 form the mold shell 5, whereby the wall filling parts 12, 13 and the connection mold parts 11 abut one another in the circumferential direction of the mold shell 5 via radial surfaces 14 and are slidably inserted into the outer mold 4, which is circular in plan. In the embodiment, one of the connection mold parts 11, namely the left connection mold part in Fig. 1, is arranged fixedly in the outer mold 4, while the

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other, in Pig« 1 right connection mold part 11 can be changed in its angular position relative to the fixed connection mold part in that one or more of the wall filling parts 12 can be moved from one of the circumferential areas of the mold shell 5 lying between the two connection mold parts 11 to the other circumferential area. Furthermore, in both circumferential areas of the mold shell 5 lying between the connection mold parts 11, one of the wall filling parts, namely the wall filling parts 13, consists of two mold pieces 13.1, 13.2 which can be displaced relative to one another in the circumferential direction of the mold shell , which are guided in the displacement direction and are provided with a drive device for mutual adjustment in the guide direction. Each of these molded parts 13.1, 13.2 has a mold wall 15 which delimits the mold space 9 to the outside, whereby the adjacent mold walls 15 of both molded parts 13.1, 13.2 overlap in the circumferential direction by at least their mutual adjustment range. The same applies to the upper end faces 16 of the molded parts 13.1, 13.2. In Fig., the wall filling part 13 shown in the upper half of the figure is shown in its position pushed together to the smallest central angle, and the wall filling part 13 shown in the lower half of the figure is shown in its position pushed apart the furthest in the central angle. The molded parts 13.1, 13.2 are guided not only on the outer mold 4 but also on each other. For this purpose, inside the wall filling parts 13 on one mold

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piece 13.2 (Fig. 3 Ms 5) at least one guide rod 17 and on the other shaped piece 13.1 guide receptacles 18 for these guide rods 17 are provided. The guide rods 17 run in a circle around the mold axis 6 with respect to their guide direction, as can be seen in particular from Fig. 3, where the guide rods 17 and the guide receptacles 18 associated with them are shown in dashed lines. The central angle of the adjustment range of both shaped pieces 13.1, 13.2 against each other is at least equal to the central angle of the \n circumferential direction of the mold shell 5 narrowest of all wall filling parts 12. Larger angle changes between the connecting shaped parts

can then be used in the manner described above

by moving the wall filling parts 12, which are unchangeable with regard to their central angle, between the two wall areas of the Ferramantel 5 between the connecting molded parts 11. Furthermore, in all embodiments, the drive device is designed as a clamping device in the adjustment direction of both molded parts 13.1, 13.2, which increases the central angle of the wall filling part 13, so that not only the molded parts 13.1, 13.2 can be adjusted relative to one another by means of the drive device, but also all wall filling parts 12, 13 and the movable connecting molded part within the outer mold 4 can be adjusted in the circumferential direction and clamped against one another by pressure. Therefore, separate connection measures between the wall filling parts 12, 13 and the connecting molded part on the one hand and the outer mold 4 on the other hand are unnecessary. The relative

The fixing of the wall filling parts 12, 13 and the connection mold part 11 in the outer mold 4 is carried out solely by bracing using the two wall filling parts 13, which are adjustable with respect to their central angle.

In the embodiments according to Fig. 3 to 6 and 9, the drive device consists of a drive spindle 19 mounted axially immovably on one molded part 13.1 with a spindle nut 20, the adjustment movement of which along the spindle axis is converted directly or via a gear into the adjustment movement of the two molded parts 13.1» 13.2 relative to one another. In the embodiment according to Fig., the drive spindle 19 is arranged essentially tangentially to the circumferential direction of the mold shell 5. It is held axially immovably in a bearing 21, which is mounted on a bracket 22 of the molded part 13.2 on the right in the drawing so as to be rotatable about an axis parallel to the mold axis 6. The spindle nut 20 is also connected to a bracket 23 of the other molded part 13.1 so as to be rotatable about an axis parallel to the mold axis. If the drive spindle 19 is actuated at its polygon 24, the two shaped pieces 13.1, 13.2 are adjusted closer together or further apart, depending on the direction of rotation of the drive spindle.

In the embodiments according to Figs. 3 to 9, the drive spindle 19 is essentially

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arranged radially to the mold axis 6. It is in turn held axially immovable in the bearing 21, which is mounted on the left mold piece 13.1 in the drawing so that it can rotate about an axis parallel to the mold axis 6 in a bracket 25. The spindle nut 20 is connected to a drive lever 26 of an adjustment gear acting between the two mold pieces 13.1, 13.2 so that it can rotate about an axis that is also parallel to the mold axis 6. In the embodiment according to Fig. 9, the drive lever 26 is mounted at one end of the lever on the left mold piece 13.1, which also supports the drive spindle 19, in a bracket 27 so that it can pivot about an axis parallel to the axis of rotation of the spindle bearing 21. At the other end, the drive lever 26 engages with a link piece 28 in an adjustment link 29 in a link plate 30 on the other molded piece 13.2 on the right in the drawing, whereby the course of the adjustment link 29.30 is designed so that a change in the distance between the two molded pieces 13.1, 13.2 results when the drive lever 26 is pivoted with the aid of the drive spindle 19.

In the embodiment according to Fig. 3 to 5, the drive lever 26 is essentially a toggle lever, which is mounted with its pivot axis in the lever knee, parallel to the axes of rotation of the spindle bearing 21 or the spindle nut 20, on the molded part 13.1 on the left in Fig. 3, which also supports the work spindle 19, on brackets 27. This angle lever is connected to the

a lever arm 26.1 to the spindle nut 20, with the other lever arm 26.2 to a pull and push rod

31, each of which can be rotated parallel to the axis against each other. The .ig and pressure rod 31 can in turn be rotated parallel to the axis on the other, in Fig. 3 right-hand molded part 13.2 in a console

32. In detail, the lever arms 26.1, 26.2 forming the toggle levers are arranged in a rotationally fixed manner on a shaft 33 which is rotatably mounted on the left-hand molded part 13·1 in the brackets 27, and are spaced apart from one another in the axial direction of the shaft 33, whereby the shaft 33 extends parallel to the mold axis 6 over a larger area of the wall filling part 13 and thus the adjusting force between the two molded parts 13.1, 13.2 is equally distributed over the height of the wall filling part 13. If the drive spindle 19 is rotated on its polygon 24 from the outside of the mold shell 5, the spindle nut 20 pivots the lever arms 26.1 _, which in turn rotate the shaft 33, so that the corresponding pivoting of the lever arms 26.2, which are connected to the shaft 33 in a rotationally fixed manner, leads to corresponding mutual adjustment movements of the mold pieces 13.1, 13.2 via the push and pull rods 31. In the embodiment according to Fig. 10, the drive spindle 19 is arranged essentially parallel to the mold axis. The spindle nut 20 engages a lever arm 26.1 of a toggle lever, which is rotatable about an axis perpendicular to the spindle axis in the bracket 27 on which the drive shaft 19 is also mounted, in the

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Drawing left shaped piece 13.1 is mounted. The other lever arm 26.2 of the toggle lever is connected so that it can rotate parallel to the axis to a pull and push rod 31 that is also mounted parallel to the axis on the bracket 32 on the other shaped piece 13.2. Two parallel-rotating spindle nuts 20 are provided along the drive spindle 19 and each spindle nut 20 is assigned its own toggle lever 26.1, 26.2 and its own pull and push rod 31. If the drive spindle 19 is rotated from above on its polygon 24, the spindle nuts 20 pivot the toggle levers 26.1, 26.2, for which purpose the spindle nuts 20 engage with adjusting pins 35 in corresponding pin slots 34 of the lever arm 26.1 connected to the spindle nut 20. The pivoting movements of the toggle levers 26.1, 26.2 lead to corresponding longitudinal adjustments of the pull and push rods 31 and this in turn to corresponding mutual adjustments of both fittings 13.1, 13.2.

In the embodiment according to Fig. 7, the two shaped pieces 13.1» 13.2 are connected to one another in their adjustment direction by a scissor gear 36. Two of the scissor levers 36.1, 36.2 are rotatably mounted on the opposite shaped pieces 13.1, 13.2 in brackets 37. The other lever ends are rotatably connected to two spindle nuts 20, which rotate in opposite directions on a support that is aligned perpendicular to the parallel lever rotation axes.

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drive spindle 19, whereby the spindle nuts 20 with pivot pins 38 engage in corresponding pin receptacles of the lever ends. The drive spindle 19 is essentially aligned radially to the forming axis 6, but it is fundamentally possible to implement a similar drive device with scissor gear 36 even if the drive spindle 19 is arranged parallel to the forming axis 6.

Finally, the embodiment according to Fig. 8 shows the possibility of designing the drive device as one or more hydraulically or pneumatically actuated cylinder-piston arrangements 40 arranged between the molded parts 13.1, 13.2 and acting in their direction of adjustment. Cylinder housing 40.1 and piston rod 40.2 are each pivotably mounted at 41 on brackets 42 of both molded parts 13.1, 13.2. Furthermore, the cylinder-piston arrangement 40 can be acted upon by the working medium on both sides in a manner not shown in detail, so that depending on which side of the piston is acted upon, both molded parts 13.1, 13.2 can be moved towards or away from each other.

Claims (15)

« · «· re &igr;· µ in ■ ■ · · * ■ * · · ■ &igr; ft ■ ·■·· » · I I I PATENT ATTORNEY D IP L-MiYS. 'D1R-1H E-ICMANN FAY Baumgärtner GmbH & Co. Maschinenfabrik KG Dr. Georg-Spohn-Str. 31 Blaubeuren 7900 Ulm, 14.08.85 File PG/6665 f/sr 1. Device for forming sewer shafts with at least two connecting sleeves for sewer pipes, consisting of wall filling parts (12, 13) forming cylindrical ring sectors in plan and connecting molded parts (11), which together form the mold shell (5) and are inserted in a circular outer mold (4) in plan so as to abut against one another in the circumferential direction, and of a mold core (7) arranged coaxially in the mold shell (5), which together with the mold shell (5) forms a mold space (9) corresponding to the shape of the molded part, which is traversed by inserts (10) which are fastened to the connecting molded parts (11), the angular position of which relative to one another can be changed by one or more of the wall filling parts (12) being able to be moved from one of the circumferential areas lying between the connecting molded parts (11), characterized in that in both between the connecting molded parts (11) lying peripheral areas of the mold shell (5) one of the wall filling parts (13) consists of two in the circumferential direction of the mold shell (5) opposite each other Address; Postfach 1767,7900 Ulm-Donau Telephone,, , &ldquor;,, ,,Tcligrnmm«· · · Postschcckkonlo Bank account I-njIngersIrnOcjl (0731)64946;. ₄ · Jnjspjl UJintlflnnd S ' · Siullgarl 732JI Deutsche Dank&Lgr;&Ogr; Ulm 184671 f C &iacgr; · f S f sliding mold pieces (13.1, 13.2) which are guided in the direction of displacement and provided with a drive device, whereby each mold piece (13.1, 13.2) has a mold wall (15) which delimits the mold space (9) and the adjacent mold walls (15) of both mold pieces (13.1, 15.2) overlap in the circumferential direction by at least their mutual adjustment range. 2. Device according to claim 1, characterized in that the shaped pieces (13.1, 13.2) are guided together and for this purpose, within the wall filling part (13) at least one guide rod (17) is provided on one shaped piece (13.2) and guide receptacles (18) for the guide rod (17) are provided on the other shaped piece (13.1). 3· Device according to claim 1 or 2, characterized in that the drive device in the adjustment direction of both molded parts (13.1, 13.2) that increases the central angle of the wall filling part (13) works as a clamping device by means of which all wall filling parts (12, 13) and the connecting molded parts (11) can be clamped against one another in the circumferential direction within the outer mold (4). 4. Device according to one of claims 1 to 3, characterized in that the central angle of the adjustment range of both molded pieces (13.1, 13.2) is opposite t &igr; * &igr; · t * « I &igr; > I I I &Iacgr; · > Il ·> each other is at least equal to the central angle of the narrowest of all wall filling parts (12) in the circumferential direction of the mold shell (5). 5. Device according to one of claims 1 to 4, dnrhiTvsVi frnlcQrmaio-i chno-k. that riio &Dgr;&eegr;+.r-i »&Tgr;-&idiagr;&Bgr;&ogr;&eeacgr;&tgr;&tgr;&eegr;-&idiagr;nVi&mdash; &mdash;&mdash;&mdash;&mdash;&mdash;&mdash;&mdash; ^j &mdash;&mdash;&mdash;&mdash;&mdash;&mdash;-·&mdash; ^- &mdash; ~~~r &mdash;■"&trade;&mdash; ·" &bgr; ^- &mdash; ^ ^- &mdash;·&mdash;&mdash; ~"~~" "&mdash;&mdash;&trade; consists of a drive spindle (19) mounted axially immovably on one shaped piece (13·&Oacgr;) with a spindle nut (20), the adjustment movement of which along the spindle axis is converted directly or via a gear into the adjustment movement of the two shaped pieces (13.1, 13.2) against each other. 6. Device according to claim 5, characterized in that when the drive spindle (19) is arranged essentially tangentially to the circumferential direction of the mold shell (5), it is held in a bearing (21) which is mounted on one mold piece (13.2) so as to be rotatable about an axis parallel to the mold axis (6), and that the spindle nut (20) is also connected to the other mold piece (13.1) so as to be rotatable about an axis parallel to the mold axis (6). 7. Device according to claim 5, characterized in that when the drive spindle (19) is arranged substantially radially to the mold axis (7), it is held in a bearing (21) which is rotatable about an axis parallel to the mold axis (7) on one 4 &Lgr; *· * t ft t · I t till I > I I I I I I ·· >■ Form piece (13.1) is mounted, and that the spindle nut (20) is rotatable about an axis also parallel to the mold axis (7) and engages a drive lever (26) of an adjustment gear acting between the two mold pieces (13.1, 13*2). 8. Device according to claim 8, characterized in that the drive lever (26) is pivotably mounted at one end of the lever on the shaped piece (13.1) which also supports the drive spindle (19) about an axis parallel to the axis of rotation of the spindle bearing (21) and engages with a link piece (28) in an adjustment link (29) on the other shaped piece (13.2), the course of the adjustment link (29) resulting in a change in the distance between the two shaped pieces (13.1, 13.2) when the drive lever (26) is pivoted. 9. Device according to claim 7, characterized in that the drive lever (26) is a knee lever which is mounted with its pivot axis located in the lever knee, parallel to the axis of rotation of the spindle bearing (21) or the spindle nut (20) on the shaped piece (13.1) which also supports the drive spindle (19) and with one lever arm (26.1) on the spindle nut (20), with the other lever arm (26.2) in each case rotatably parallel to the axis to a likewise parallel to the axis > I Il «· ) I !»111· &bull; It) »ill · · I I I «111 Il H) &igr; &igr; · j &igr;&igr;&igr; · a hit in) ti )r ti &igr; » j a pull and push rod (31) rotatably mounted on the other fitting (13.2) is connected. 10. Device according to claim 9, characterized in that the lever arms forming the toggle levers (26.1, 26.2) are seated in a rotationally fixed manner on a shaft (33) rotatably mounted on the molded piece (13.1) and are arranged at a distance from one another in the axial direction of the shaft (33). 11. Device according to claim 5, characterized in that when the drive spindle (19) is arranged essentially parallel to the mold axis (7), the spindle nut (20) engages a lever arm (26.1) of a toggle lever which is mounted so as to be rotatable about an axis perpendicular to the spindle axis on the mold piece (13.1) which also supports the drive spindle (19) and whose other lever arm (26.2) is connected so as to be rotatable parallel to the axis to a pull and push rod (31) which is also mounted so as to be rotatable parallel to the axis on the other mold piece (13.2). 12. Device according to claim 11, characterized in that several synchronously rotating spindle nuts (20) are provided along the drive spindle (19) and each spindle nut (20) is assigned its own toggle lever (26.1, 26.2) and its own pull and push rod (31). 13. Device according to one of claims 1 to 4, characterized in that the two shaped pieces (13.1, 13.2) are connected to one another in their adjustment direction by a scissor gear (36), wherein _{two two} scissor _levers (36.1, 36.2) are rotatably mounted on the oppositely located shaped pieces (13.1, 13.2) and are rotatably connected with the other lever ends to two spindle nuts (20) which run in opposite directions on a drive spindle (19) aligned perpendicular to the parallel lever rotation axes. 14. Device according to claim 13, characterized in that the drive spindle (19) is aligned radially to the mold axis (7). 15. Device according to one of claims 1 to 4, characterized in that the drive device consists of at least one hydraulically or pneumatically actuated cylinder-piston arrangement (40) arranged between the molded pieces (13.1f 13.2) and effective in their adjustment direction. 16« Device according to claim 15, characterized in that the cylinder-piston arrangement (40) can be acted upon from both sides.