EP0631019A1 - Manhole or container - Google Patents

Abstract

In a manhole or container (B) composed of plastic sections, in particular for sewage engineering, in which two adjacent sections each with radial, annular flanges meet, which can be pressed together with at least one releasable and detachable clamping member each, recesses (13) defining a locating passage (P) are provided at both flanges (6, 7), and the clamping member (G) has a shank (18), insertable in the locating passage (P) and having an abutment part (19) supportable against a first flange surface (7b) and a clamping head (20) with at least one supporting surface (21), as well as a clamping wedge (E, E') which can be driven in transversely to the shank longitudinal axis between the supporting surface (21) and a second flange surface (7a). <IMAGE>

Description

The invention relates to a manhole or container composed of manhole or container sections made of plastic according to the preamble of protection claim 1.

In a shaft known from DE-OS 41 22 299, the abutting flanges of two sections are pressed against one another by means of a clamping ring which encompasses the flanges and runs around the outside or a plurality of holding clips located on the outside. Attaching or removing the clamping ring or the retaining clips requires skill and is time-consuming, especially with two flanges pointing inwards. When assembling the clamping ring, the large diameter of the sections usually means that several workers have to work together. With holding clips only low contact forces can be generated or essentially single connection zones are created, which are critical for plastic sections.

In the case of a sludge trap made of sheet metal tube sections known from EP-A-0 456 958, a circumferential, double-conical clamping ring is fitted on the outside in each joint area.

In a container known from AT-PS 29 00 78, FIG. 20, the sections are tensioned against one another by a large number of tie rods extending over the entire container height.

The invention has for its object to provide a shaft or container of the type mentioned, in which plastic sections easily, quickly, with high tightness, are firm and easy to install.

The object is achieved with the features contained in claim 1.

Even with large sections, a man can assemble the shaft or container quickly and easily. Each abutment part creates relatively large contact areas with the clamping wedge. Using the clamping wedge, high contact forces can be built up and maintained with relatively little effort. The tendons are easy to use and do not require any notable skill. A high level of tightness and good structural strength of the shaft or container is achieved. The tendons can be mass-produced at low cost. No special tools are required; a hammer or other simple striking tool is sufficient to drive in the clamping wedge. The disassembly is also easy, convenient and quick to carry out, since the clamping wedge can be easily removed, even when the shaft of the shaft is dirty or when access is restricted.

Each receiving channel can be a bore through which the shaft is inserted approximately parallel to the outer wall of the shaft or container. However, the embodiment according to claim 2 is expedient because the shaft can then simply be inserted into the receiving channel from the outside.

In order that the tendon in the receiving channel is secured against sliding outward, the embodiment according to claim 3 is advantageous.

A simple assembly and intrinsic securing of the tendon accommodated in the receiving channel is given in the embodiment according to claim 4. The tendon is snapped into the receiving channel from the outside and can no longer fall out. The clamping wedge can already be inserted under the clamping head, so that the other part no longer slides out when the tendon is still loose. However, it is also conceivable to slide the clamping wedge into the receiving channel only after the shaft has been introduced and then to drive it in. All tendons are expediently used first, the tensioning wedges being plugged in at the time of insertion or being attached subsequently, before the tensioning wedges are driven in successively or crosswise. The dimensional coordination between the shaft and the inlet slot can be chosen strictly, so that a good intrinsic securing of the tendon is achieved. When snapping in by twisting the shaft, both the elongated abutment part and the clamping wedge can be used to have favorable lever arms for twisting. The holding force generated with each tendon can be precisely predetermined by the manufacturer, so that overall a uniform pressing of the flanges is ensured.

In the embodiment according to claim 5, there is an intrinsic safety of the loose tendon.

A structurally simple and leading to a firm hold embodiment emerges from claim 6. The clamping wedge works with both finger joints, the wedge surfaces of which can generate high contact forces with little effort.

The embodiment according to claim is particularly expedient 7, because the undercut support surfaces and the rising wedge surfaces pull the finger joints against each other and prevent spreading and loosening of the clamping wedge. Furthermore, the frictional engagement of the clamping wedge is increased.

In the embodiment according to claim 8, the clamping wedge can be introduced from each side of the clamping head. If the clamping wedge is properly driven in, there is a non-positive and positive locking, so that the clamping wedge can no longer be released automatically.

A particularly convenient handling is given in the embodiment according to claim 9. After insertion, the shaft is supported on the flange surface with the support shoulders so that the clamping wedge can be pushed in without holding the shaft. The clamping head is held at a distance from the flange surface that allows easy insertion of the clamping wedge.

The embodiment according to claim 10 is technically simple because the shape of the wider shaft section creates the support shoulders used to support the clamping head. In addition, the widened shaft section ensures good guidance of the finger prongs of the clamping wedge when driving in.

A particularly expedient and easy-to-use embodiment is set out in claim 11. The clamping wedge can no longer fall off the tendon even when it is loose. Although the tendon consists of two parts, it can be handled as a unit. Because the clamping wedge is in the right place from the start Is tied to the shaft, the wedge surfaces and the support surfaces can be easily formed for cooperation. For example, each support surface, such as the wedge surfaces of the clamping wedge, can run obliquely in order to generate a high contact force with little effort.

An alternative embodiment is set out in claim 12. Here, the shaft is pushed through the receiving channel with the clamping wedge removed and then held by the clamping wedge pushed in before it is driven in. This enables a simple design of the receiving channel, which can be designed as a closed bore or shaft-like passage.

The embodiment according to claim 13 is also inexpensive because impact-resistant plastics can be processed easily and true to shape, and ensure high and constant holding forces of the tendon.

The shaft or container section according to claim 14 can be connected by means of several tendons with similar or only with respect to the flange same sections firmly. Using the tendons, manholes and containers, such as grease separator containers or inspection ducts, can be assembled or prefabricated on site. The circumferential distances are chosen so that there is a uniform pressure between the flanges lying one on top of the other.

In the embodiment according to claim 15, the alternating curved and flat wall areas with the stepped transitions increase the buckling and buckling strength of the section. The flat wall areas are good for connecting cables and / or attaching insert parts, the required opening being cut out. The two tendon recesses near the transitions are located at structurally favorable locations on the flange. In addition, there is the important advantage of simplified demolding in the manufacture of the shaft or container section as an injection molded part, because slides or movable core parts of the molds for flat wall areas are cheaper for molding these elements of the section. The flange widenings create the space required for attaching the tendons and enable good power transmission.

In order to be able to align the recesses to form the receiving channels cleanly with one another and also to exclude relative movements between the sections during use under loads, the embodiment according to claim 16 is advantageous. The centering parts interlock, i.e. the centering projections engage in the centering openings as soon as the flanges are properly placed on top of one another. Via the interlocking centering parts, both radial forces and forces acting in the circumferential direction are absorbed between the adjacent sections and held by the sealing ring and the tendons.

In the embodiment according to claim 17, the tendons are mounted on the inside facing flange of the shaft or container section, for example from the outside. With the tendons, high holding and contact forces can be achieved in large areas. The power transmission is cheap near the transitions. The cavities for the abutment parts of the tendons are molded in the section wall from the outset, which is what the manipulation with simplified the tendons and placed them as close as possible to the inward-facing flange. The arrangement of the flange parts in the flat wall parts also has the advantage of better demoldability when forming the sections as injection molded parts. The flat and curved wall areas with their transitions noticeably increase the structural strength of the sections or section walls.

In the embodiment according to claim 18, a uniform connection structure is achieved in a shaft or container by the regularly arranged and aligned tendons in the recesses. The shaft or container maintains the static properties and the tightness of a one-piece container or shaft. The sections are light and easy to transport and can be assembled on site to the desired container or shaft size. The shaft or container must be dismantled or redesigned at any time. An additional stiffening of the sections is achieved by the longitudinal ribs arranged in the curved wall areas.

A particularly important embodiment with independent meaning emerges from claim 19. The circumferential wall shoulder divides the flat and curved wall areas into smaller and therefore more stable fields and increases the overall structural strength of the section. Furthermore, the flat wall areas are relatively steep, which simplifies the connection of lines and is advantageous when stacking the same sections. A regular, integrated stiffening skeleton is created in each section, which is filled by the wall areas.

In the embodiment according to claim 20, a high degree of tightness is achieved between the flanges lying one on top of the other because the tendons press the flanges firmly against one another by means of the sealing ring.

Fig. 1

einen schematischen Längsschnitt eines aus Sektionen zusammengesetzten Behälters,

Fig. 2

einen Längsschnitt eines Schachts, der aus mehreren Sektionen zusammensetzbar ist,

Fig. 3

eine Perspektiv-Phantom-Ansicht einer Behälter- oder Schacht-Sektion,

Fig. 4

einen Horizontal-Teilschnitt in der Ebene IV-IV von Fig. 3 bzw. Fig. 6,

Fig. 5

eine Draufsicht auf die Sektion von Fig. 3 in Blickrichtung V,

Fig. 6

einen Vertikalschnitt in der Ebene VI-VI in Fig. 3,

Fig. 6a

einen Vertikalschnitt einer Detailvariante von Fig. 6,

Fig. 7

ein zweiteiliges Spannglied vor der Montage,

Fig. 8

das Spannglied beim Zusammensetzen zweier Sektionen in einem ersten Montageschritt,

Fig. 9

das Spannglied von Fig. 8 in montiertem Zustand,

Fig. 10

eine weitere Ausführungsform eines zweiteiligen Spanngliedes, und

Fig. 11

eine Draufsicht in der Richtung XI zu Fig. 8.

Exemplary embodiments of the subject matter of the invention are explained with the aid of the drawing. Show it:

Fig. 1

2 shows a schematic longitudinal section of a container composed of sections,

Fig. 2

a longitudinal section of a shaft, which can be assembled from several sections,

Fig. 3

a perspective phantom view of a container or shaft section,

Fig. 4

6 shows a horizontal partial section in the plane IV-IV of FIG. 3 or FIG. 6,

Fig. 5

3 shows a plan view of the section of FIG. 3 in the viewing direction V,

Fig. 6

a vertical section in the plane VI-VI in Fig. 3,

Fig. 6a

6 shows a vertical section of a detailed variant of FIG. 6,

Fig. 7

a two-part tendon before assembly,

Fig. 8

the tendon when assembling two sections in a first assembly step,

Fig. 9

8 in the assembled state,

Fig. 10

a further embodiment of a two-part tendon, and

Fig. 11

8 shows a plan view in the direction XI to FIG. 8.

A container B according to FIG. 1, composed of a plurality of plastic sections, for example a grease separating container, consists of a cup-shaped base section 1 onto which a frustoconical section 2, which is open at both ends, is fitted. An identical frustoconical section 2 is placed in the opposite position on the lower section 2, on which a cover section 3 is placed. In the lid section 3 there is a height-adjustable attachment part 4. Longitudinal stiffening ribs 5 are formed on the outside of the sections 2. The bottom section 1 and the cover section 3 have radially outwardly directed circumferential flanges 7, which correspond to the flanges 7 arranged on the sections 2 at the large-diameter opening edge and facing outwards. At the small-diameter opening edges the sections 2 are integrally formed flanges 6. The sections are clamped to one another with the aid of tendons G which are regularly distributed over the circumference (indicated by arrows). The joint areas are sealed by sealing rings 9 (FIG. 2) inserted in receiving grooves 8.

The shaft S according to FIG. 2 consists of a base section 5 and two frustoconical sections 2 corresponding to those of FIG. 1, as well as a cover section 3 'and an attachment part 4. The sections 2 in turn have the flanges 6, 7. They are placed on one another with their flanges 7 facing outwards, while the bottom section 5 is placed on the inner flange 6 and the cover part 3 'on the inner flange 6 of the upper section 2. The sections are connected as in FIG. 1 with tendons, for example of the type shown in FIGS. 7 to 11 and with the interposition of sealing rings 9. A circumferential wall shoulder 10 is formed at approximately half the height of each section 2.

According to FIG. 3, each section 2 of FIGS. 1 and 2 has in its closed section wall W in the circumferential direction alternately flat wall areas F and curved or conical wall areas K, between which stepped transitions U are formed. The wall shoulder 10 divides the flat and curved wall areas F, K in the vertical direction. The inward-facing flange 6, the outward-facing flange 7, the approximately vertical transitions U, the circumferential wall shoulder 10 and the vertical stiffening ribs 5 form an integrated stiffening skeleton, which is filled by the flat and curved wall areas F, K. Section 2 is a plastic injection molded part made of PVC, PV, PP or PEHD and can have a height of approx. 500 mm and a mean diameter of approx. 750 to 1200 mm with a wall thickness of 1 to 2 cm.

Section 2 is shown with the flange 6 facing inwards and the flange 7 pointing outwards. However, it would also be conceivable to design the section 2 in a pot shape and to provide either the flange 6 or the flange 7 at the opening edge.

Centering parts 11a, 11b distributed in the circumferential direction are provided for each flange 6, 7, expediently alternately a conical centering pin 11a and a conical centering opening 11b. If two flanges 7 or two flanges 6 are placed one on top of the other when assembling a shaft or container, then the centering pins 11a enter the centering openings 11b in order to exactly center the flanges against one another. Flange extensions 12 are formed on the outwardly facing flange 7 at regular circumferential intervals. In each flange widening 12, in this embodiment, an outwardly open tendon recess 13 is formed, on the two sides of which centering parts 11a, 11b are provided. The flange widenings 12 extend the flange 7 outwards and are located in pairs below a flat wall area F near its transitions U to the curved wall areas K. In the embodiment shown, the cutouts 13 are provided with a regular, e.g. 22.5 ° division over the circumference.

With the inward-facing flange 6, outward-facing flange widenings 14 are arranged above the flat wall regions F near their transitions U, and although also with a, for example 22.5 ° division. Depending on the size of section 2, the division of may vary. The smaller the section 2, the fewer recesses 13 can be provided in the flanges 6, 7. A laterally open tendon recess 13 is formed in each flange widening 14 and a centering part 11a or 11b is arranged. The flange widenings 14 are expediently combined in pairs in a strip-shaped flange part 16. Adjacent to the flange extensions 14, the section wall W is drawn inwards in order to define cavities 15 below the flange extensions 14, which are expedient for the assembly of the tendons.

The cavities 15 can be clearly seen in section in FIG. 4. They have an approximately trapezoidal cross section and extend over a height (FIG. 11) which is slightly greater than the thickness of the flange parts 14. In FIG. 4, the transitions U, the wall shoulder 10 and the flat and curved wall regions F, K can be seen, as well as the outwardly extending flange widenings 12 with the cutouts 13 and the vertical stiffening ribs 5 running out in the flange 7. The inwardly facing flange 6 is cut away in FIG. 4.

5 (top view in the direction of arrow V in FIG. 3), the flange widenings 14 formed in the bar-shaped flange parts 16 on the inward-pointing flange 6 with their recesses 13 and the alternating centering parts 11a, 11b can be seen, and 5 ° division indicated. The recesses 13 in the flange widenings 14 are axially aligned approximately with the recesses 13 of the flange widenings 12.

Fig. 6 shows that the flange widenings 14 extend the inward-facing flange 6 outwards and lie above the cavities 15, in which the section wall W is drawn in further than the depth of the recess 13 corresponds. To each recess (FIGS. 5 and 6) 13 there is an inlet slot 27 with an inlet width f that is smaller than the width of the recess 13. This is achieved by locking lugs 17 pointing inwards in the cutouts 13, which extend approximately over half the height of the flange widenings 14.

Fig. 6a shows that the flange extensions 14 with the recesses 13 can also be directed inwards, so that the tendons G are to be installed from the inside. The cavities 15 are then not absolutely necessary. This design could also be chosen for flange 7.

Tendons G, G 'according to FIGS. 7 to 11 are used to assemble the sections to form the desired container or shaft. 7 consists of two elements made separately from impact-resistant plastic (for example PVC, PP, PEHD or PA), namely a part D and a clamping wedge E. Part D has an abutment part 19 with an approximately central shaft 18, from which the abutment part 19 protrudes on both sides in the manner of a hammer head. The shaft 18 carries at the upper end a clamping head 20 with two support surfaces 21 on the underside, which run parallel to the longitudinal direction of the abutment part 19. In this embodiment of part D, the support surfaces 21 are for Undercut 18 and symmetrically designed, that is, each support surface 21 has an initial rise 21a, a central peak 21c with an inflection point and a final fall 21b. Two support shoulders 22 are formed on the shaft 18, the purpose of which will be explained later. The support shoulders 22 form the transitions from an upper, wider shaft section 23 to the stepped shaft 18, which extends as far as the abutment part 19.

The clamping wedge E consists of a driving head 24 of a cube-shaped shape, from which two finger tines 25 extend in parallel with an intermediate distance corresponding approximately to the shaft width. Each finger 25 has a flat lower surface and an upper wedge surface 26, which is intended to engage a support surface 21. Each wedge surface 26 (FIG. 8) consists of an initial section 26a, a crest 26b with an inflection point and a depression 26c located at the drive head 24, the depression 26c being designed approximately negatively to the support surface 21. The height of the finger tines 25, at their free ends, corresponds approximately to the height of the shaft section 23 of the shaft 18.

8, the flanges 7 (with the interposition of the sealing ring 9, not shown) are placed one on top of the other and aligned such that the cutouts 13 form a continuous receiving channel P for the shaft 18 of the part D of the tendon G. The shaft 18 is held with a play in the receiving channel P. The support shoulders 22 are wider than the width of the receiving channel P, so that the shaft 18 is secured against sliding down by resting the support shoulders 22 on a flange surface 7a. The abutment part 19 lies on the other flange surface 7b opposite. The clamping wedge E is inserted along the shaft 18 under the clamping head 20 and moved by pressing or hitting the driving head 24 until the support surfaces 21 are engaged in the depressions 26c of the wedge surfaces 26. Due to the symmetry of the support surfaces 21, the clamping wedge 24 could also be inserted and fixed from the other side.

11, the width f of the inlet slot 27 to the receiving channel P is smaller than the length 1 of the cross section Q of the shaft 18. On the other hand, the width b of the shaft 18 is smaller than the width f. This means that in order to insert the part D into the receiving channel P, the shaft 18 must first be inserted with one edge and then rotated past the locking lug 17 by rotation about the shaft axis with the other cross-sectional edge. The dimensions are expediently coordinated with one another in such a way that a certain resistance to movement is overcome for insertion. This leads to an intrinsic securing effect of part D in the receiving channel. As soon as it is snapped in, the part D can no longer fall out automatically. In the exemplary embodiment shown, the shaft has a rectangular cross section Q with rounded edges. However, any other cross-sectional shape would be conceivable that is narrower than the inlet slot 27 in a dimension direction that allows insertion and can then be secured in the receiving channel P by a rotational movement about the shaft axis.

9, the clamping wedge E is driven into its end position, so that the support part 19 is supported on the flange surface 7b and the clamping wedge E on the flange surface 7a and the flanges press against one another. The undercut of the support surfaces 21 and the slope of the Wedge surfaces 26 (FIG. 7) prevent the finger tines 25 from spreading apart, which are pressed firmly against the shaft sides when the tensioning wedge E is driven in, which increases the frictional connection of the connection.

The tendon G can be released at any time. It is only necessary to press or hit the free ends of the finger tines 25 to release the clamping wedge E before the shaft 18 is subsequently removed from the receiving channel P by unscrewing it.

In the embodiment of the tensioning member G 'according to FIG. 10, the tensioning wedge E' is captively and positively held on the part D ', which facilitates assembly. For this purpose, two inwardly facing lugs 28 are formed on the inner sides of the finger tines 25 near the ends thereof, which push the finger tines 25 apart for a short time in order to snap the clamping wedge E 'onto the shaft 18. Since the tendon G 'can be preassembled after the manufacture of its parts D' and E 'and the tensioning wedge E' no longer falls automatically, the support surfaces 21 can be designed with a straight rise and therefore simpler than in FIG. 7. It is also conceivable to connect the finger prongs 25 by a cross connection near the free ends and to use the elasticity of the material to spread the finger prongs 25 apart and to snap them over the clamping head 29. In this case, it would not be necessary to undercut the support surfaces 21 and to incline the wedge surfaces 26. These surfaces could then be left horizontal because the finger prongs 25 are prevented from spreading apart when driving in by the connecting piece. Furthermore, it would be conceivable to use the recesses for the shaft 18 in the flange widenings 12 or 14 Form closed passages in a size in which the shaft 18 is inserted with the clamping head 20 from the bottom up and held by the clamping wedge E or the captive clamping wedge E 'of Fig. 10 until the tendon G, G' is fixed. In this case, the support shoulders 22 and the shaft section 23 would be unnecessary. The shaft 18 could also be round or square. Instead of the outer support surfaces 21, a passage could be provided in the shaft end or in the clamping head 20 for a simple clamping wedge to be inserted there.

Claims (20)

Shaft or container (B) composed of plastic sections, in particular for wastewater and separation technology, in which two adjacent sections meet with radial, annular flanges that can be pressed together with at least one releasable and removable tendon, characterized in that Both flanges (6, 7) between their flange surfaces (7a, 7b) are aligned with each other, a common receiving channel (P) defining recesses (13) are provided, and that the clamping member (G) an elongated shaft insertable into the receiving channel (P) (18) with an abutment part (19) which can be supported against a first flange surface (7b) in one shaft end region and with a clamping head (20) with at least one support surface (21) in the other shaft end region and one transverse to the longitudinal axis of the shaft between the support surface (21) and one has a second flange surface (7a) of a drivable clamping wedge (E, E '). Shaft or container according to claim 1, characterized in that an inlet slot (27) extending from the flange edges into the receiving channel (P) is provided. Shaft or container according to claim 2, characterized in that the inlet slot (27) is narrower than the receiving channel (P). Shaft or container according to claims 1 to 3, characterized in that the shaft cross-section (Q) is narrower than the inlet slot in a dimensioning area (b) (27), and that the tendon (G) can be snapped into the receiving channel (P) by inserting the shaft (18) through the inlet slot (27) and rotating it around the shaft axis, the narrower dimensioning range (b) preferably in the longitudinal direction of the abutment part (19) and the clamping wedge (E, E ') runs. Shaft or container according to at least one of Claims 1 to 4, characterized in that a locking lug (17) for the shaft (18) is provided in the inlet slot (27) on both sides and adjacent to a flange surface (7a, 7b), which preferably is extends over almost half the flange thickness. Shaft or container according to at least one of Claims 1 to 5, characterized in that the abutment part (19) of the tensioning member (G) projects over the shaft (18) on both sides in the manner of a hammer head, that the shaft cross-section (Q) is approximately rectangular is that on the underside of the clamping head (20) two supporting surfaces (21) lying on both sides of the shaft (18) are provided, and that the clamping wedge (E, E ') has a driving head (24) and two of them projecting approximately parallel and the Shank (18) has interlocking finger joints (25), on the upper sides of which the support surfaces (21) face wedge surfaces (26) are formed. Shaft or container according to Claim 6, characterized in that the support surfaces (21) undercut in the direction of the shaft (18) and the wedge surfaces (26) of the finger tines (25) are designed to rise towards the shaft (18). Shaft or container according to at least one of Claims 1 to 7, characterized in that each support surface (21) - viewed in the sliding direction of the clamping wedge (E, E ') - has an initial rise (21a), a central dome (21b) and an end fall ( 21c), the initial rise (21a) and the final fall (21c) being symmetrical with respect to the crest (21b), and that each wedge surface (26) - viewed in the sliding direction of the tensioning wedge (E, E ') - one towards the driving head (24) rising starting section (26a), a subsequent crest (26b) with an inflection point and a subsequent depression (26c), which preferably corresponds to the shape and size of the support surface (21). Shaft or container according to at least one of claims 1 to 8, characterized in that the shaft (18) at a distance from the clamping head (20) corresponding approximately to the height of the finger prongs (25) has at least one support shoulder (22) with which the Clamping wedge (E) inserted into the receiving channel (P) can be supported on the second flange surface (7a) facing the clamping head (20) against sliding into the receiving channel (P). Shaft or container according to claim 9, characterized in that two support shoulders (22) are provided on the shaft (18), of which a shaft section (23) which is wider than the receiving channel (P) extends as far as the clamping head (20). Shaft or container according to at least one of Claims 1 to 8, characterized in that the clamping wedge (E ') between the abutment part (19) and the clamping head (20) on the shaft (18) is form-fitting and captive is supported. Shaft or container according to claim 11, characterized in that an inwardly facing nose (28) is formed on the clamping wedge (E) in at least the free end region of one of the finger tines (25) and is preferably with the other finger tine (25) or one , also formed on the nose (28) a gap with a gap width smaller than the narrower dimensioning range (b) of the shaft (18), and that the clamping wedge (E ') with elastic spreading of the finger teeth (25) onto the shaft (18) can be snapped on. Shaft or container according to claims 1 to 12, characterized in that the clamping member (G) consists of impact and tear-resistant plastic, and that the shaft (18) with the abutment part (19) and the clamping head (20 ') on the one hand and the Clamping wedge (E, E ') on the other hand are one-piece injection molded parts. Manhole or container section made of plastic for assembling a shaft or container according to at least one of claims 1 to 13, wherein a radial flange facing outwards or inwards is provided on at least one opening edge of the section, characterized in that the flange ( 6, 7) has formed tendon recesses (13) at approximately regular circumferential intervals, preferably with a 22.5 ° division. Shaft or container section according to claim 14, characterized in that the section wall (W) has alternating curved and flat wall areas (F, K) alternately in the circumferential direction, between which stepped transitions (U) are provided, and that on the flange (6, 7) at each flat wall area (F) near its transitions (U) there is an outward or inward-facing flange widening (12) with a molded-in tendon recess (13 ) is provided. Shaft or container section according to Claim 15, characterized in that at least one centering part (11a, 11b) is provided in the flange widening (12), preferably a centering opening (11a) on one side and a centering projection (11b) on the other side the recess (13). Manhole or container section made of plastic for assembling a manhole or container according to at least one of claims 1 to 13, with a radial flange pointing inwards at least at an opening edge, characterized in that the section wall (W) is adjacent to the flange (6 ) has alternating curved and flat wall areas (F, K) alternating in the circumferential direction, are provided between the step-like transitions (U), and that on the inward-pointing flange (6) for each flat wall area (F) outward or inward flange widenings ( 14) and the transitions (U) of the flat wall area (F) adjacent tendon recesses (13), and, preferably centering parts (11a, 11b) are formed, preferably in each case in a beam-shaped flange part (16), and preferably in the outward direction Pointing flange widening 12, the section wall (W) adjacent to the tendon recess (13) is deformed and laterally open Hoh laces (15) for the abutment parts (19) of the tendons (G) forms. Shaft or container section, in particular according to claims 14 to 17, characterized in that the recesses (13) in both flanges (6, 7) are aligned approximately axially with one another, and that on the outside on each curved wall area (K) there is a longitudinal one Stiffening rib (5) is formed, which extends from the outward-facing flange (7) to the free opening edge of the section (2) between adjacent flange parts (16) in the inward-facing flange (6). Shaft or container section according to claims 15 to 18, characterized in that the wall areas (F, K) adjoining one flange (6) are opposite the wall areas (F, K) adjoining the other flange (7) in the section wall (W) are arranged offset inwards or outwards and are connected to one another by at least one wall shoulder (10) which runs parallel to the two flanges (6, 7). Manhole or container section according to at least one of Claims 14 to 19, characterized in that at least one circumferential receiving groove (8) for a sealing ring (9) is provided in each flange (6, 7) separately from the tendon recesses (13) is.

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