EP2940221A1 - Plastic shaft - Google Patents

Abstract

In a plastic shaft (S) with square cross section, circumferentially same height (H1, H2), open bottom and top sides and four side walls bounding the cross section, the side walls are separately manufactured and identical side parts (1 to 4, 1 'to 4 '), which at the high edges (7, 8) at least via connectors (V) at right angles to each other to the plastic shaft (S) are connectable.

Description

The invention relates to a plastic shaft according to the preamble of claim 1.

For example, such square shafts are installed in which installations or connected to which pipes, for a variety of purposes in wastewater, rainwater harvesting systems or the like. Used. Thus, it is known in infiltration and containment systems to use a square shaft, which serves as inlet, throttle, inspection or filter shaft, and is space-saving because of the square shape incorporated into the respective system, e.g. on an outside or inside of the system. In a high infiltration and containment system, several such square shafts may be stacked. As a rule, the shaft is closed at the lower open end by a bottom plate, a cover is installed at the upper open end, for example, leads from the at least one attachment part to the ground level. For example, access to the interior of the system is possible. These square plastic shafts are dimensionally stable and light, require one-piece training bulky and expensive tools for manufacturing and result mainly in logistics, transportation and storage problems, as they require considerable storage space.

The invention has for its object to provide a plastic shaft of the type mentioned, with respect to the known logistics, storage and transport problems are reduced, and which is inexpensive to produce and yet comfortable to handle.

The stated object is achieved with the features of claim 1.

Since the plastic shaft of four identical and even identical side parts is created, which can be connected at any time at right angles to the shaft and dismantled, flat and have a low strength, are advantages in terms of logistics, transportation, storage and the Production achieved. The side panels can be stacked lying comfortably and space-saving and, for example, only connect to the shaft on site. The connections are easy to handle even by untrained (DIY) to create the dimensionally stable shaft. In storage or transport package of several side panels also a bottom plate and / or a cover can also be incorporated to save space, as these are also relatively flat components. Finally, the tool for making the side part is relatively simple, and because flat cost. Also, the dismantling is designed easy. Despite these advantages, the plastic shaft made of the connected side parts at least substantially fulfills the same requirements as one-piece shafts.

Without limiting the invention are suitable for connecting the side parts particularly plug, staple, screw, Spreizniet-, adhesive or welded joints. For this purpose, the side parts can e.g. be prepared in terms of shape in the field of high edges, so that no or a few loose parts are additionally required for the compounds, and the compounds are dimensionally stable.

In an expedient embodiment, tabs and pockets are integrally formed on the opposite high edges of each side part, which in each case form the plug connection between two side parts. Since the lugs and pockets mate with each other in the shaft, they can in the direction of insertion and transverse to have considerable dimensions and thus form a stable and resilient connector in which the rectangular joint area is stiffened. If necessary, the connections can be secured by screws or rivets.

In a further embodiment, a high edge of the side part only plug-in nose and the other high edge only on pockets. These are aligned with each other in the side part, so that for the production of the plug-in connector, the lugs of a side part can be introduced into the pockets of the next side part. It may be expedient to provide between the sockets or pockets in the vertical direction gaps to provide sufficient load-bearing plastic material in the active region of the connector. Alternatively, each high edge, preferably alternately, lugs and pockets, which are offset from one another at the two high edges in the vertical direction, and, preferably, are distributed with intermediate intervals.

Particularly useful the identical side parts are made in the same injection mold to minimize tooling costs. For large numbers, however, several identical injection molds, possibly even simultaneously, can be used.

In order to improve the usability of the plastic shaft for different conditions of use, four side parts with a first height and four side parts with at least one second height are expediently provided for at least two shafts of different heights. In this case, the second height correspond to about half the first height, and are, suitably, all the side parts made with the same width.

Even for the side members in the first and second heights, a single injection mold can be used, e.g. an upper transverse edge of the second height side members is formed using a tool change insert in the injection molding tool designed for the higher side portions.

In order to be able to concentrate on several of the plastic shafts centered for larger installation heights and secure to each other, or even for attaching a cover or for setting up the plastic shaft on a bottom plate, it may be expedient if each side part at a connecting the high edges transverse edge an outer fold and on the opposite transverse edge has an inner fold. Such, formed from the plug-connected side parts shaft can be positively combined with at least one similar plastic shaft, which lies above and / or below. The cover is placed on the outer rabbet with an edge and centered. The bottom plate may be inserted into the inner folds e.g. be used flush.

Furthermore, it is expedient if the respective rectangular connector is positively and / or non-positively lockable, preferably via at least one restoring deformable latching tongue. Although the pockets and sockets are already available for fixing only by appropriate matching the lock offers the advantage that an educated plastic shaft no longer fall apart under load. Additional backups may be appropriate on a case-by-case basis.

Since it can arrive with regard to the dimensional stability of the plastic shaft formed from the plug-connected side panels on stable connectors, it is expedient if each connector is stabilized at least at right angles at right angles. In this case, for example, one of the plug adjacent, parallel to the inside of the side part fitting surface may be formed on the inside of the side part, which cooperates with one of the insertion pocket, projecting from the inside of the side member with nose perpendicular to the inside counter-surface, as soon as the connector is made.

In order to disassemble the shaft when needed, if the connectors are locked, it may be appropriate to provide in the outer side of the side part in the region of the pocket an opening for introducing a locking release tool so that the locking latching tongue is released when pulling the connector ,

It is also favorable if each side part is ribbed in terms of shape and / or structure for stiffening. Circular cut-out markings may also be preformed or applied, eg with references to the respective nominal width of, for example, a connection to be made Tube. In order to cut out an opening with the aid of such a marking, it may be expedient to provide there cutting attachment openings, eg for a jigsaw. In the side part high rigidity is achieved with ribs and / or structures with low weight, which would not be feasible alone with large wall thickness.

In the inner rabbet of the plug-connected side parts, a corresponding outer rabbet having shaft bottom can be used.

Further, it is possible to put over the outer folds of the side parts a circumferential Aufsetzrand having cover, which is centered by positive engagement on the plastic shaft.

In a specific embodiment, at a height of the side parts of about 600 mm to 700 mm, for example 660 mm, four regularly spaced tabs and four regularly spaced pockets are provided, however, at a height of the side parts of about 300 mm to 400 mm, e.g. 355 mm, only two pockets and two lugs.

Each side panel is appropriate, as well as possibly the bottom plate or the cover made of glass fiber reinforced polypropylene, which guarantees excellent performance over long periods and yet ensures high dimensional stability with low weight of the side panel. However, other plastics proven in this technology are also useful, such as e.g. PE, and not necessarily a fiber reinforcement must be provided. Injection molding is a convenient manufacturing process, as well as rotational molding, casting, blow molding and the like.

Fig. 1

einen Kunststoff-Schacht in einer Seitenansicht, konstruiert mit einer Bodenplatte und einer Abdeckung,

Fig. 2

eine Seitenansicht eines Kunststoff-Schachtes mit anderer Höhe als in Fig. 1,

Fig. 3

eine Draufsicht auf den Kunststoff-Schacht der Fig. 1 oder Fig. 2,

Fig. 4

eine Draufsicht eines Seitenteiles des Schachts der Fig. 1,

Fig. 5

einen Schnitt in der Ebene V - V in Fig. 4,

Fig. 6

einen Schnitt in der Ebene VI - VI in Fig. 4,

Fig. 7

einen Schnitt in der Ebene VII - VII in Fig. 4,

Fig. 8

eine Perspektivdarstellung des Seitenteiles der Fig. 4 bis 7, in Blickrichtung auf dessen Innenseite,

Fig. 9

eine Draufsicht eines Seitenteiles des Kunststoff-Schachtes der Fig. 2,

Fig. 10

einen Schnitt in der Schnittebene X - X in Fig. 9,

Fig. 11

einen Schnitt in der Schnittebene XI - XI in Fig. 9,

Fig. 12

eine Draufsicht der in den Fig. 1 und 2 verbauten Bodenplatte,

Fig. 13

einen Schnitt in der Ebene XIII - XIII in Fig. 12,

Fig. 14

eine Draufsicht der in den Fig. 1 und 2 verbauten Abdeckung,

Fig. 15

einen Schnitt in der Schnittebene XV - XV in Fig. 14, und

Fig. 16

eine Perspektivansicht eines Transport- oder Lagergebindes aus mehreren Seitenteilen, beispielsweise jeweils entsprechend Fig. 4.

Embodiments of the subject invention will be explained with reference to the drawings. Show it:

Fig. 1

a plastic shaft in a side view, constructed with a bottom plate and a cover,

Fig. 2

a side view of a plastic shaft with a different height than in Fig. 1 .

Fig. 3

a top view of the plastic shaft of the Fig. 1 or Fig. 2 .

Fig. 4

a plan view of a side part of the shaft of the Fig. 1 .

Fig. 5

a section in the plane V - V in Fig. 4 .

Fig. 6

a section in the plane VI - VI in Fig. 4 .

Fig. 7

a section in the plane VII - VII in Fig. 4 .

Fig. 8

a perspective view of the side part of the Fig. 4 to 7 , looking towards the inside,

Fig. 9

a plan view of a side part of the plastic shaft of Fig. 2 .

Fig. 10

a section in the section plane X - X in Fig. 9 .

Fig. 11

a section in the sectional plane XI - XI in Fig. 9 .

Fig. 12

a top view of the in the Fig. 1 and 2 built-in floor plate,

Fig. 13

a section in the plane XIII - XIII in Fig. 12 .

Fig. 14

a top view of the in the Fig. 1 and 2 built-in cover,

Fig. 15

a section in the section plane XV - XV in Fig. 14 , and

Fig. 16

a perspective view of a transport or Lagergebindes of several side parts, for example, respectively accordingly Fig. 4 ,

An in Fig. 1 shown plastic tray S a first height H1 is made of four identical and separately manufactured side parts 1, 2, 3 and 4 provided in the corner regions connections V, eg connectors V created. The plastic shaft S has an at least approximately square cross section and an outer corner dimension D (FIG. Fig. 3). Fig. 1 shows the outer side 15 of the side part 1, which is substantially flat and continuous, possibly cut-out marks 5 for cutting round openings for connecting pipes or passages, wherein, optionally, recessed at the outlines of the markings 5 cut-neck openings 6 can be, for example for a jigsaw.

However, the plastic shaft S, which is used for example as inspection, filter, inlet or throttle shaft in infiltration and containment systems, but also in other applications, for example in wastewater or rainwater harvesting and the like., Usable where a Square shaft is needed.

In Fig. 1 is the plastic shaft S combined with an attached to the open top cover T and a bottom plate inserted into the open bottom B. The plastic shaft S could alternatively be combined with similar plastic manholes by plugging or plugging to a specific shaft overall height to form of individual sections. The connectors V in the corner regions of the plastic shaft secure its side parts 1 to 4 at right angles to each other, stabilize the angular integrity and allow the construction of the plastic shaft S on site, as well as, if necessary, the disassembly at any time. The bottom plate B and the cover T are optional pieces of equipment of the plastic shaft S, and may be omitted occasionally or replaced by other functions fulfilling components. The connectors V can be secured by screws or rivets or the like.

The cover T has a central, here circular, opening 30, which can act as a manhole, or for inserting a top piece, not shown, which bridges the distance to the ground, for example, in underground installation of the plastic shaft S. As Fig. 3 indicated by the caption of the bottom part B, here has the plastic shaft S the function of an inspection shaft.

Suitable connections V of the side parts 1 to 4 are also clamped, screwed, riveted, glued or welded joints, wherein the side parts 1 to 4 can be prepared for this purpose at least in the region of the high edges 7, 8 to form no or few loose parts to be blocked for this.

Fig. 2 shows a plastic well S of a second height H2, which may be about half of the first height H1. The plastic shaft S in Fig. 2 also consists of four, here for example via connectors V ( Fig. 3 ) in the corner areas interconnected side parts 1 'to 4', which are identical to each other and made separately. Also in Fig. 2 is the plastic shaft S with the same or the plastic shaft of Fig. 1 stackable or, as shown, combined with a cover T and / or a bottom plate B.

The side parts 1 to 4 of the plastic shaft S of Fig. 1 can be made in one and the same tool, for example an injection mold, and consist for example of polypropylene with a glass fiber reinforcement.

The side parts 1 'to 4' of the plastic shaft S of Fig. 2 can be made in the same tool. It is even possible and expedient, both the side parts 1 to 4 and the side parts 1 'to 4' of the plastic shafts S of Fig. 1 and 2 produce in the same injection mold, which can reduce tooling costs drastically, for example by the second height H2 of the Fig. 2 the injection mold is used with an interchangeable insert which covers a part of the mold cavity so that, like the comparison of the Fig. 1 and 2 shows, the upper transverse edge 10 of each side part 1 'to 4' comes to rest where in the side parts 1 to 4 is a running in the middle of the height ribbing, so that in the side part 1 'to 4', the two larger circular markings 5 are cut off.

Fig. 4 shows in plan view the side part 1 (1 to 4) for creating the plastic shaft S of Fig. 1 with the first height H1. Fig. 4 is a plan view of the outer side 15 of the rectangular or square side part with opposite high edges 7, 8 and upper and lower transverse edges 10, 9. At the high edge 7 are in the embodiment in Fig. 4 four tabs 11 formed (the side part is made in one piece), of which at least one latching tongue 12 may include for locking the connector V. The number of lugs 11 may be larger or smaller than shown. Optionally, a single strong and expansively sized plug-in nose 11 at the high edge 7 is sufficient. In the area of the opposite high edge 8, the number of plug-in lugs 11 corresponding to, and aligned to this, molded-in pockets 13 which are perpendicular to the main plane of the side member here on the inside 16 (FIG. Fig. 5 ) are open and correspond to the shape of the lugs 11. The lugs 11 may be double-walled and contain the latching tongue 12 adjacent to the underside of a parallel to the main plane mating surface 20. Each plug-in pocket 13 extends perpendicular to the main plane of the side member and may be accessible from the substantially outer side 15 of the side member through an opening 14 through which, for example, a locking release tool is to be inserted.

As is clear from the 4 and 5 results, the lugs 11 of a side part are inserted into the pockets 13 of another side part until they are positively fitted into the pockets 13, wherein the locking tongues 12 initially give restoring when they pass a projection 18, and then spring back behind and the connector V. lock. Optionally, adjacent to each plug-in pocket 13 there is provided a counter-fit surface 19 perpendicular to the main plane of the side part, for example on a nose 17 projecting over the inner side 16, which optionally can also be used to position a plurality of flat stacked side parts. Once the connector V is properly made, the mating surface 20 may cooperate with the mating fitting surface 19 to further stabilize the right angle connector V between two side members.

In the sectional view in Fig. 6 In addition, ribs and structures 21 of the side part are also indicated.

In the sectional view in Fig. 7 are also ribbed and structures 21 of the side panel indicated. Further, at the upper transverse edge 10, an outer fold 23 and at the bottom Transverse edge 9 an inner fold 22 shaped. Taking advantage of the inner and outer rabbets 22, 23 not only a plurality of plastic wells S can be stacked and centered in each other, but can be brought to the created plastic tray S the cover T with a Aufsetzrand 31 on the outer seams 23, and is the Bottom plate B inside, for example, flush with the inner folds 22 and centered.

Fig. 8 shows a perspective view of the side part 1 (1 to 4) with a view, for example, on the inside 16. The outer fold 23 at the upper transverse edge 10 is clearly visible and is offset from individual, the upper transverse edge 10 defining ribs. The lugs 11 are open to the inside 16, but double-walled with the molded locking tongues 12, which are recessed on three sides and resiliently resetting. In alignment with the in the Fig. 1, 2 and 4 Cutting marks 5 shown may be formed inside ribs, or other structures. The pockets 13 are like the lugs 11 separated by intervals between each other and distributed, for example, regularly. The side part 1 of Fig. 8 is design-proof yet lightweight, so it can easily be carried and manipulated by one person.

Alternatively, at both high edges 7, 8, e.g. alternating plug-in lugs 11 and pockets 13 may be provided (not shown), with which the connectors V can be produced.

Similar to the 4 to 6 , show the Fig. 9 to 11 a plan view and two sectional views of the side part 1 '(1' to 4 ') for the plastic shaft S of Fig. 2 with the second height H2. The first height H1 may be between about 600 mm and 700 mm, for example 660 mm, while the second height H2 may be between about 300 mm and 400 mm, and in the shown embodiment 355 mm.

Fig. 9 illustrates that the side part 1 'of the lower half of the side part 1 of Fig. 4 corresponds, which, as mentioned, for example, by means of a tool change insert is achievable in an injection mold, in which also the side parts 1 to 4 could be produced. Of course, a separate tool could be used only for the production of the side parts 1 'to 4'. The further construction of the side part 1 'corresponds to that in the Fig. 4 to 7 shown. In addition, it is possible to provide a projection 33 (possibly several) projecting on the inner side 16, which effect mutual positioning when stacking flat side parts 1 'to 4'.

Fig. 12 is the top view of the bottom plate B, which is formed as a one-piece plastic molded part 24 and with a peripheral support rim 25 fits into the inner rabbet 22 of Fig. 7 is provided, wherein in the corners 26 recesses are formed with the correspondingly shaped Can interact elements positioning at the lower corners of the plastic shaft S. The top of the bottom plate B is continuous, high arched and appropriately labeled, while the bottom plate B according to Fig. 13 ribbed at the bottom (ribs 27) can be.

The cover T according to Fig. 14 For example, is a one-piece plastic molding 28 with an outer corner measure corresponding to, for example, the corner D in Fig. 3 , and a lower-side circumferential Aufsetzrand 31, with which the cover T on the outer folds 23 (FIGS. Fig. 7 ) and can be centered on the plastic shaft S. The plastic molding 28 is formed at least on the top with ribs 29, which increase the dimensional stability with low weight, and has a circular cylindrical centric opening 30 here, which can serve as a seat of an attachment, not shown, or optionally receives a manhole cover.

Fig. 16 illustrates how a plurality of side panels 1 to 4 lying flat stacked form a storage and / or transport package G eg on a pallet 32, wherein the inner side 16 of each side part 1 to 4 and the tabs 11 and the vertically oriented pockets 13 are illustrated more clearly. The container G can be easily supplemented by several bottom plates B and / or covers T, which can also be integrated flat lying in the container, if they are needed.

Claims (15)

Plastic shaft (S), in particular for infiltration and retention systems, with at least approximately square cross-section, circumferentially the same height (H1, H2), open bottom and top sides and four side walls bounding the cross-section, characterized in that the side walls in one piece produced and identical side parts (1 to 4, 1 'to 4') are perpendicular to each other at the high edges (7, 8) connected to one another. Plastic shaft according to claim 1, characterized in that the side parts (1 to 4, 1 'to 4') by plug, staple, screw, Spreizniet-, adhesive or welded joints (V) connectable, and, preferably, at least in the area of their high edges (7, 8) are technically prepared for the respective type of compound (V). Plastic shaft according to claim 2, characterized in that at the opposite high edges (7, 8) of the side part (1 to 4, 1 'to 4') in each case at least one plug-in nose (11) and a plug-in pocket (13) is integrally formed, which interfaced a right-angled connector (V) between two of the side parts (1 to 4, 1 'to 4') form. Plastic shaft according to claim 3, characterized in that either a high edge (7) only lugs (11) and the other high edge (8) only on the lugs (11) aligned plug-in pockets (13), preferably each with a gap in the vertical direction or that each high edge (7, 8), preferably alternately, plug-in lugs (11) and pockets (13), preferably each with an intermediate distance in the vertical direction, which are offset from each other at the two high edges (7, 8) in the vertical direction. Plastic shaft according to one of the preceding claims, characterized in that the side parts (1 to 4) are made in the same tool, preferably an injection mold. Plastic shaft according to at least one of claims 1 to 4, characterized in that for at least two different height shafts (S) four side parts (1 to 4) having a first height (H1) and four side parts (1 'to 4') at least a second height (H2) are provided, the second height (H2) corresponds to approximately half the first height (H1), and all side parts (1 to 4, 1 'to 4') have the same width. Plastic shaft according to claim 6, characterized in that the side parts (1 to 4, 1 'to 4') with the first and second heights (H1, H2) in the same tool, in particular Injection mold, are produced, wherein for the second height (H2) at least one tool change insert is provided in the tool, preferably for forming at least the transverse edge (10) of the side part (1 'to 4') with the second height (H2). Plastic shaft according to at least one of the preceding claims, characterized in that each side part (up to 4, 1 'to 4') on one of the high edges (7, 8) connecting transverse edge (10) has an outer fold (23) and at the opposite transverse edge ( 9) has an inner fold (22), such that the plastic shaft (S) created from the connected side parts (1 to 4, 1 'to 4') can be plugged together in a form-fitting manner with at least one similar shaft arranged above or below it. Plastic shaft according to claim 3, characterized in that the rectangular connector (V) positive and / or non-positively lockable, preferably via at least one resiliently deformable locking tongue (12). Plastic shaft according to claim 3, characterized in that the rectangular connector (V) is stabilized at least form-fitting at right angles, preferably via one of the plug (11) adjacent, to the inside (16) parallel mating surface (20) on the inside (16 ) of the side part (1 to 4, 1 'to 4') and one of the plug pocket (13) adjacent, from the inside (16) projecting nose (17) with the inside (16) perpendicular GegenPassfläche (19). Plastic shaft according to claim 3, characterized in that the outer side (15) of the side part (1 to 4, 1 'to 4') in the region of the plug-in pocket (13) has an opening (14) for a locking release tool. Plastic shaft according to at least one of the preceding claims, characterized in that each side part (1 to 4, 1 'to 4') is ribbed and structured for stiffening and, preferably circular, cut-out markings (5) and / or cut Having attachment openings (6). Plastic shaft according to claim 8, characterized in that in the Innenfalze (22) of the connected side parts (1 to 4, 1 'to 4') of the plastic shaft (S), a bottom plate (B) can be inserted. Plastic shaft according to claim 8, characterized in that on the outer rabbet (23) of the connected side parts (1 to 4, 1 'to 4') of the plastic shaft (S) a cover (T) with a Aufsetzrand (31) can be applied is. Plastic shaft according to at least one of the preceding claims, characterized in that at a first height (H1) of about 600 mm to 700 mm of the side part (1 to 4) four regularly spaced tabs (11) and / or pockets (13) and at a second height (H2) of about 300 mm to 400 mm of the side part (1 'to 4') two plug-in projections (11) and two plug-in pockets (13) are provided.

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