Closure for a wall element or floor element

Abstract

The invention relates to a use of a closure (1), which closure (1) has an elastomer body (10), wherein the elastomer body (10) is a generatively constructed part and is provided with an interior space (50), for sealing against a wall or floor element (2) of a building.

Description

 CLOSURE FOR A WALL ELEMENT OR FLOOR ELEMENT The present invention relates to a closure for sealing against a wall or floor element and / or against a line. In some variants, the closure has an elastomer body for sealing, which in use can be inserted, for example, axially into an opening in the wall or floor element. With the closure or elastomer body, a seal can be created both towards the wall or floor element and also towards a line passing through the opening. For this purpose, the elastomer body can be provided with a passage opening through which the line is laid. By biasing / tensioning / bracing or pressing, the elastomer body can then, for example, lie radially inward sealingly against the line and radially outward sealingly against a wall delimiting the opening in the wall or floor element, for example the wall of a core bore or of a casing which is embedded in concrete. This is intended to illustrate a typical application environment. The present invention is based on the technical problem of specifying an advantageous closure for sealing against a wall or floor element or a line. This is achieved with the closure according to claim 1. As explained in detail below, the closure body can, on the one hand, be an elastomer body which, for example, can be produced / manufactured generatively / additively or can be assembled from elastomer body parts. Alternatively, however, the closure body can also be formed (proportionally) from a harder material. Specifically, an elastomer part can form a lateral wall of the closure body, whereas a pressing body which is harder in comparison therewith forms an end face wall. Irrespective of this configuration which differs in detail, the closure body is preferably provided with an interior space in all variants, that is to say is constructed with a hollow space or empty space in its interior. The interior space can, for example, reduce the material consumption / requirement or also the weight, which can be advantageous, for example, with regard to the transport etc. By contrast, a conventional closure body, in particular elastomer body, is cut, for example, from a comparatively thick plate, that is to say, is hence present as a solid body with a comparatively high weight, especially since there can be scrap / waste. If the elastomer body is constructed generatively / additively in the present case, that is to say, for example, is constructed or is manufactured in layers from a previously shapeless / neutral material on the basis of a computer model, the production may indeed be to some extent more complicated. Owing to the freedom of geometric configuration, the elastomer body with the interior space can, however, be configured such that the advantages realized with the new geometry predominate (for example lower material consumption or scrap / waste or less weight or also possible “additional function(s)”, see below in detail). The interior space of the closure body, in particular elastomer body, can, for example, in contrast to a passage opening for the line, be closed axially on both sides, for example at least over a region. The interior space therefore does not necessarily have to be hermetically closed per se; there can, for example, be an opening / openings for emptying non-solidified material. Furthermore, there can also be one or more injection openings, for example if the interior space is acted upon by a fluid / injection material for mounting the closure (see below in detail). In summary, there can therefore also be locations of the interior space at which the latter is open toward an axial side; but conversely, there is at least one region in which the interior space is closed in both axial directions. In other words, the interior space is delimited axially on both sides by in each case one end wall of the closure body, in particular elastomer body, at least in regions. As discussed in detail below, an outer shell / casing wall can enclose the interior space radially to the outside, wherein in the case of a closure body, in particular elastomer body, with a passage opening for the line, there can also be an inner shell wall (which delimits the interior space radially to the inside). The reference to the “closure body” or “elastomer body” relates, for example, to a part which is integrally connected per se and which is constructed from the layers and cannot be separated in a non-destructive manner. Generally, within the scope of the present disclosure, the specifications “axial”, “radial” or “circumferential”, and also the associated directions (“axial direction” etc.) relate, for example, to a longitudinal axis of the opening in the wall or floor element or to an axis about which, for example, an outer lateral wall surface of the outer shell wall is at least rotationally symmetrical or in particular axisymmetric. In this case, however, the term “radial” generally does not have to imply a circular shape; the closure body, in particular elastomer body, can also have, for example, a polygonal, in particular rectangular, outer shape in cross section (and, for example, be inserted into a frame together with further “block-shaped” closure bodies, in particular elastomer bodies); alternatively or in addition thereto, for example, the line can also have an outer shape which deviates from the circular shape, for example in the case of a flat cable. Nevertheless, a circular geometry can be preferred, that is to say, the radially outer lateral wall surface of the outer shell wall and / or the radially inner lateral wall surface can have a circular shape in a section perpendicular to the axial direction. The closure body, in particular elastomer body, can be smaller, for example, in the axial direction than in the radial direction. Its (the closure body's) axial length, taken between the end faces, can make up, for example, at most 90%, 80%, 70%, 60%, or 50% of its diameter, taken radially (with possible lower limits at, for example, 5%, or 10%). In other words, the closure body / elastomer body can have a substantially flat disk shape. In this case, the reference to a “diameter” does not have to imply a circular shape, but rather is to be read generally as an average value of smallest and largest extent which, in the preferred case of the circular shape, corresponds to the circular diameter. The interior space can represent a volume which is connected per se, that is to say fluidically connected, or can also be subdivided into a plurality of detail / smaller volumes which are decoupled from one another (compare, for example, the variants discussed below with / having a “cavity”). In relation to an outer volume of the closure body, in particular elastomer body, which is taken, for example, axially between its end face surfaces and radially to the outside with respect to the outer shell / lateral surface, with the removal of a passage opening for the line (if present), the volume of the interior space can make up, for example, at least 5%, 10%, 20%, 30%, 40%, or 50% (with possible upper limits at, for example, at most 90% or 80%). In detail, the volume enclosed can in this case also depend on the function or use of the interior space, that is to say, for example, also on the type of biasing / pressing of the closure body, in particular elastomer body. The “elastomer material” of the elastomer body or elastomer part or elastomer body part is quite generally a plastic with elastic behavior. Its Shore hardness (Shore A) can be, for example, at most 90 Shore, 80 Shore, 75 Shore, or 70 Shore and (irrespective thereof), for example, at least 20 Shore, 25 Shore, or 30 Shore. It can be, for example, a polymerized resin, compare in particular the remarks on stereolithography, but also a thermoplastic elastomer (TPE) or a silicone-based material, for example silicone elastomer. In a preferred configuration, the interior space is provided such that the closure body, in particular elastomer body, can be widened more easily radially / in the radial direction than axially / in the axial direction. In other words, the structure of the closure body, in particular elastomer body, delimiting or passing through the interior space is provided such that, under an internal and / or external action of force, a radial expansion can be achieved more easily than an axial expansion. With the radial expansion, the closure body, in particular elastomer body, lies sealingly (in a sealing manner) against, for example with its outer lateral wall surface against a wall delimiting the opening and / or with its inner lateral wall surface against the line. By virtue of the inner / internal structure of the closure body, in particular the elastomer body, the expansion in this direction is promoted, whereby the force required for applying the necessary pressing force during biasing / pressing can be lower, which can, for example, also permit a finer setting of the pressing force or prevent damage (for example to the line). For this purpose, with the inner structure of the closure body, in particular elastomer body, for example, more and / or stronger connections can be provided between the end walls than, for example, between the inner and outer lateral walls. According to a preferred embodiment, the closure body, in particular elastomer body, has an axial strut which extends axially through the interior space. In this case, it generally does not necessarily have to lie parallel to the axial direction, but rather it can, for example, additionally be inclined in the radial and / or circumferential direction. In comparison with the other directions, however, the extent of the axial strut has, for example, at least the largest proportion in the axial direction; particularly preferably, it lies parallel thereto. Also, independently of its specific orientation in detail, the axial strut can, on the one hand, be rod-shaped, that is to say extend in principle in one dimension. On the other hand, however, it can, for example, also have a lamellar shape, for instance be provided as a wall passing through or also dividing the interior space. As viewed in a section perpendicular to the axis, the rod-shaped strut can be substantially point-shaped / point-like, by contrast, the lamellar strut describes a linear shape. Irrespective of these details, the axial strut is part of the closure body, in particular elastomer body, that is to say it is, for example, constructed generatively together with the remaining closure body, in particular elastomer body, (or produced in another way in one piece or monolithically therewith). Preferably, a plurality of such axial struts can be provided distributed over the interior space, for example distributed in the circumferential and / or radial direction. Within the scope of this disclosure, “a” and “an” are to be read without an explicit indication to the contrary as an indefinite article and therefore always also as “at least one”. The closure body, in particular elastomer body, can thus, for example, also be provided with a plurality of passage openings, that is to say be designed for passing through a plurality of lines. The two axial ends of the axial strut(s) is / are preferably each connected to an end wall of the closure body, in particular elastomer body. In detail, the respective axial strut runs in this case into an inner wall surface of the respective end wall, which inner wall surface delimits the interior space axially. According to a preferred embodiment, the axial strut extends in this case between its two axial ends, by means of which it is connected to the respective end wall, without being connected to a lateral wall of the closure body, in particular elastomer body. The axial strut is then thus not connected to the outer shell wall and, if present, also not to an inner shell wall which delimits a passage opening for the line. If a plurality of struts are provided, this criterion can be satisfied, for example, for at least the larger part of the struts, that is to say, for example, for at least 60%, 70%, or 80% of the struts (100% are also possible). The embodiments discussed above relate to all closure body variants, whereas the variants which now follow primarily relate to the elastomer body variant. In the latter, the elastomer body itself forms the interior space, which is thus a cavity in the elastomer body. In other words, the elastomer body can delimit the cavity radially and also axially. As mentioned at the outset, such an elastomer body can, on the one hand, be produced by additive manufacturing, that is to say by selective solidification in layers of a previously shapeless / neutral material. Alternatively, however, the elastomer body can also be assembled from a plurality of elastomer body parts which are beforehand produced separately and then connected to one another. The individual elastomer body parts can in this case be produced in a manner which is conventional per se, for instance by pressing into a mold or injection molding. In this manner too, if the elastomer body is subdivided into elastomer body parts with one or more parting planes, complex geometries with undercuts etc. can be produced. Accordingly, all the following embodiments which relate to geometric details of the interior space can be of interest for the elastomer body, irrespective of whether the latter is produced additively or by assembling parts. According to a preferred embodiment, the interior space has a circumferential cavity. The latter can preferably be closed circumferentially per se, that is to say form a circumferential, fluidically connected volume. The elastomer body preferably has a passage opening for a line, wherein the cavity extends circumferentially around the latter (in the case of a plurality of passage openings preferably around this plurality). The circumferential cavity can preferably be used for the biasing / pressing of the elastomer body, namely can be subjected to pressure, such that the outer lateral wall surface is pressed outward and, if present, the inner lateral wall surface is pressed radially inward. In this case, the pressure can be applied, for example, by introducing gas or else a liquid / injection material, see below in detail. With the interior space, it is then possible, for example, not only to realize a material / weight saving, but alternatively or additionally also another form of biasing / pressing (application of pressure from the inside instead of from the outside). According to a preferred embodiment, an outer intermediate space is provided radially between the circumferential cavity and the outer lateral wall surface and / or an inner intermediate space is provided radially between the circumferential cavity and the inner lateral wall surface. In this case, the intermediate space / spaces is / are likewise part of the interior space, but are offset radially in comparison with the circumferential cavity. With the intermediate space / spaces, it is possible, for example, to set the radial pressing force or else to reduce the amount of fluid required for biasing / pressing, see below in detail. According to a preferred embodiment, the elastomer body comprises a radial strut which is constructed generatively / additively in one piece with the remaining elastomer body. The radial strut extends radially through a respective intermediate space, that is to say through the inner or outer intermediate space. It can generally also have a certain tilt with respect to the corresponding radial direction or preferably lie parallel thereto. Preferably, there is a plurality of radial struts, for example at least 4, 8, or 12 radial struts, distributed circumferentially in the respective intermediate space, with the result that a pressing force can be transmitted uniformly radially inward or outward (the number of radial struts can also depend in detail on the size of the elastomer body; possible upper limits per intermediate space can lie, for example, at 500, 400, 300, or 200 radial struts). In order to promote its radial expansion, the circumferential cavity can be provided, for example, in relation to a respective intermediate space with a smaller number of radial struts; preferably, it has no radial strutting at all. In a preferred configuration, the circumferential cavity and a respective intermediate space are fluidically decoupled, that is to say they do not form a connected volume. In the case of, for example, a pressure application with a gas or a liquid of low viscosity, only the circumferential cavity has to be filled with this gas / liquid, for example, which reduces the need for fluid required for biasing / pressing. By contrast, in the case of a viscous injection material as fluid, for example, in spite of a certain fluidic connection, substantially only the circumferential cavity can be filled when the curing injection material closes the connection itself to a certain extent. According to a preferred embodiment, the cavity comprises a chamber structure. The latter can comprise a plurality of chambers, that is to say partial volumes which, however, are still fluidically connected to one another. For this purpose, a respective chamber can be surrounded by elastomer body material, for example, over the larger part of its outer circumference, but not completely. By virtue of, for example, connecting channels still remaining between the individual chambers, non-solidified material can be emptied, for example, during generative build-up and / or a pressure distribution can be set, for example, during biasing / pressing (a desired direction can be predefined for instance for expanding injection material). In a preferred embodiment, the build direction of the elastomer body lies tilted with respect to the axial direction, for example, by at least 5° or 10° and not more than 45° or 35°. In the build direction, for example, the individual layers are arranged one after the other, that is to say, a respective layer lies, for example, perpendicularly to the build direction. The tilt with respect to the axial direction can be advantageous, for example, to the effect that the proportion to be solidified per layer then does not become too large at the end face. According to a preferred embodiment, a stiffening element is provided, in particular integrated into the elastomer material, in at least one end face wall of the elastomer body. It can, for example, be converted from the elastomer material during generative production or, for example, be injection-molded as an insert part during injection-molding production. The stiffening element is provided from a harder material than the elastomer body, for example metal or preferably hard plastic (cf. the definition below). According to a preferred embodiment, the closure has a pressing body on at least one end face of the elastomer body. Said pressing body can be provided from a harder material than the elastomer body, that is to say, for example, a material of greater Shore hardness. The pressing body can protect the end face (for example from insect feed) and / or stabilize it, for example prevent axial bulging. The pressing body can, for example, be provided from a hard plastic or generally also from metal. A “hard plastic” can, for example, have a Shore hardness (D) of at least 50 Shore, 60 Shore, or 70 Shore, with possible upper limits at at most 85 Shore or 80 Shore. Possible materials are, for example, acrylonitrile-butadiene-styrene (ABS) or polypropylene (PP). Independently of the material in detail, a pressing body can also be arranged on both mutually axially opposite end faces of the elastomer body, quite generally also independently of an axial relative clamping capability of the mutually opposite pressing bodies. Even if the pressing bodies are, for example, arranged statically / stationary with respect to one another at a defined relative distance from one another (that is to say are not moved towards one another for biasing / pressing), they can then, for example, counteract an axial expansion of the elastomer body if the clamping force is applied by applying fluid to the interior space. In a preferred configuration, the pressing body is also a generatively / additively constructed part, preferably it is constructed in one piece with the elastomer body. According to a preferred embodiment, the pressing body is part of a clamping device with a clamping bolt, wherein the pressing body can be biased / pressed by tightening the clamping bolt. The clamping bolt can generally also be arranged, for example, radially outside the elastomer body and can be screwed, for example, to / with the wall or floor element. The clamping bolt preferably extends at least into the elastomer body, where it can generally engage, for example, in an integrated nut. It particularly preferably passes through the elastomer body and is operatively connected / coupled to a further pressing body which is arranged on the opposite end face of the elastomer body. By tightening the clamping bolt, the pressing bodies can then be moved towards one another and the elastomer body can thus be axially compressed, such that said elastomer body extends radially outward and lies / presses sealingly against the wall and, in the case of the passage opening, said elastomer body extends radially inward an lies / presses sealingly against the line. According to a preferred embodiment, the elastomer body has an injection opening via which at least a part of the interior space can be acted on / is acted on with a fluid for pressing the elastomer body. The latter can be, for example, a gas or a liquid, in particular also injection material. The fluid can be supplied to the entire interior space or else only a part thereof, for example to the circumferential cavity discussed above. The invention also relates to a production method in which the elastomer body is generatively / additively constructed. This can be carried out, for example, in a stereolithography method which is based in principle on a selective / targeted polymerization. For this purpose, a liquid resin can be provided which is solidified selectively layer by layer by irradiation in regions, for instance by UV irradiation. The irradiation can be carried out, for example, with a laser, wherein the region to be irradiated per layer can then be scanned with the laser beam. As an alternative to stereolithography, production can also be carried out, for example, by polymer printing or by selective joining / adhesive bonding, for instance in a powder binder method, or by selective use of thermally activatable phases (fused layer manufacturing). Furthermore, the invention relates to a use of the closure for sealing against a wall or floor element and / or against a line. The wall or floor element can be, for example, a building wall or a building floor, in particular a building outer wall or a floor slab of the building, that is to say a foundation slab. In this case, the term “building” can also comprise technical buildings, for example transformer stations or the like. Independently of these details, the wall or floor element can be provided, for example, from stone or in particular concrete, wherein the opening which is then sealed with the closure can be drilled in or cut into or also kept free during production of the wall or floor element, for instance can be formed by a casing or a feed-through. The line can be, on the one hand, the media-carrying line itself or, for example, also an empty pipe in which the actual line is then laid. A media-carrying line can be, for example, a pipe, for instance for water, district heating or gas, or else a cable, for instance for electrical / data. According to a preferred embodiment, the elastomer body is clamped by tightening a clamping bolt. This can interact in particular with a pressing body or pressing bodies (see above), but alternatively it can also be, for example, part of a radial clamping device. The latter can, for example, be placed together with a plurality of elastomer bodies which are each polygonal or rectangular in cross section into a frame and then pressed radially against the elastomer bodies which are stacked on or next to one another. According to a preferred embodiment, the elastomer body is biased / pressed by introducing a fluid into at least a part of the interior space, compare the preceding remarks in detail. After the introduction of the fluid, it is possible, for example, to close an injection nozzle (for example pressed closed with a clamp). Likewise, the fluid can be introduced, for example, via a valve which then automatically closes the interior space. In a preferred configuration, the fluid is an injection material which hardens after introduction. During introduction, it can therefore be flowable, and after introduction its flowability decreases. This hardening can be carried out, for example, in reaction to temperature or as a result of a reaction with a further component, for instance in the case of a two component material, for instance based on polyurethane. Irrespective of these details, the action of the fluid and the biasing / pressing by means of clamping bolts can represent alternatives or else be combined. The variants with a generatively constructed elastomer body can also be combined in the form of the following aspects: 1. Closure (1) for sealing against a wall or floor element (2) and / or against a line (3), havingan elastomer body (10),wherein the elastomer body (10) is a generatively constructed part and is preferably provided with an interior space (50). 2. Closure (1) according to aspect 1, in which the interior space (50) is provided such that the elastomer body (10) can be widened more easily radially / in the radial direction than axially / in the axial direction. 3. Closure (1) according to one of the preceding aspects, in which the elastomer body (10) has an axial strut (25) which extends axially through the interior space (50). 4. Closure (1) according to aspect 3, in which the two axial ends of the axial strut (25) are each connected to an end wall (11a, b) of the elastomer body (10). 5. Closure (1) according to aspect 4, in which the two axial ends of the axial strut (25) extend without being connected to a lateral wall (15, 16) of the elastomer body (10). 6. Closure (1) according to one of the preceding aspects, in which the interior space (50) is provided with a circumferential cavity (55). 7. Closure (1) according to aspect 6, in which the interior space (50) comprises an outer intermediate space (57) which is arranged radially between the circumferential cavity (55) and an outer lateral wall surface (16.2). 8. Closure (1) according to aspect 6 or 7, in which the elastomer body (10) has a passage opening (9) for passing through a line (3), wherein the interior space (50) comprises an inner intermediate space (56) which is arranged radially between the circumferential cavity (55) and an inner lateral wall surface (15.1). 9. Closure (1) according to aspect 7 or 8, in which the elastomer body (10) has a radial strut (26, 27) which extends radially through the outer intermediate space (57) and / or the inner intermediate space (56). 10. Closure (1) according to one of aspects 7 to 9, in which the circumferential cavity (55) is fluidically decoupled from the outer intermediate space (56) and / or the inner intermediate space (56). 11. Closure (1) according to one of the preceding aspects, in which the interior space (50) comprises a chamber structure (60), namely a plurality of chambers (61) which, however, are still fluidically connected to one another. 12. Closure (1) according to one of the preceding aspects, in which a build direction (300) of the elastomer body (10) lies tilted with respect to an axial direction. 13. Closure (1) according to one of the preceding aspects, in which a pressing body (105a, b) made of a harder material than the elastomer body (10) is provided on at least one end face (10a, b) of the elastomer body (10). 14. Closure (1) according to aspect 13, in which the pressing body (105a, b) is also a generatively constructed part, in particular is constructed in one piece with the elastomer body (10). 15. Closure (1) according to aspect 13 or 14, in which the pressing body (105a, b) is part of a clamping device (100) with a clamping bolt (106) and the pressing body (105a, b) and thus the elastomer body (10) can be biased / pressed by tightening the clamping bolt (106). 16. Closure (1) according to one of the preceding aspects, in which the elastomer body (10) has an injection opening (45) via which at least a part of the interior space (50) can be acted on with a fluid for pressing the elastomer body (10). 17. Method for producing a closure (1) according to one of the preceding aspects, in which the elastomer body (10) is generatively constructed. 18. Use of a closure (1) according to one of aspects 1 to 16 for sealing against a wall or floor element (2) and / or against a line (3). 19. Use according to aspect 18, in which the elastomer body (10) is biased / pressed by tightening a clamping bolt (106). 20. Use according to aspect 18 or 19, in which the elastomer body (10) is biased / pressed by introducing a fluid into at least a part of the interior space (50). 21. Use according to aspect 20, in which the fluid is an injection material which hardens after introduction into at least the part of the interior space (50). Closure body variants are discussed below, in which an elastomer part and a pressing body which is harder in comparison therewith together form the closure body, that is to say the interior space is (also) delimited by the harder pressing body. The interior space can be advantageous, for example, with regard to the assembly possibilities of the closure body; the latter can be pressed on, for example, via a pressure application of the / a pressure applied to the interior space. Alternatively or additionally, however, the interior space can also be of interest, for example, for weight reasons, and can, for example, also reduce transport costs in the case of large quantities. In the variant discussed below, the closure body has an elastomer part which is provided from elastomer material (cf. the definition above). This elastomer part can be constructed / manufactured generatively or can preferably be produced in a molding method, for instance by pressing into a mold or injection molding. Irrespective of these details, the closure body additionally has a pressing body which is provided from a harder material than the elastomer part. In a preferred configuration, the pressing body delimits the interior space axially, that is to say is not placed onto an end face wall from the outside (in contrast to the variants above). In other words, the harder pressing body forms the axial end face wall of the closure body, whereas the inner and / or outer lateral wall is / are formed by (an) elastomer part(s). Thus, for example, a deformation characteristic described above can be achieved, for instance a stronger expansion radially than axially. In general, the pressing body / bodies can, for example, also be provided from metal. However, a hard plastic is preferred, cf. the definition above and possible material details. The pressing body / bodies is / are preferably provided as injection-molded part(s). As viewed in the axial direction, the pressing body can have a shape corresponding to the opening in the wall or floor element, for example generally be polygonal (for example rectangular) or in particular round, preferably circular. Furthermore, if the closure is designed for passing through a line, a passage opening can be provided in the pressing body (an elastomer part can be arranged therein, see below). As mentioned at the outset, the closure can also be designed for a plurality of lines, that is to say there can be a plurality of passage openings. According to a preferred embodiment, both end faces of the closure body are respectively formed by a pressing body made of a harder material than the elastomer part, that is to say the interior space is preferably delimited axially on both sides by in each case one pressing body. For differentiation below, these pressing bodies are also referred to as front and rear pressing bodies, the front pressing body can then delimit the interior space in an axial direction and the rear pressing body in the opposite axial direction. The elastomer part can form an outer lateral wall of the closure body, that is to say can be pressed on or sealed in the course of assembly toward a wall. However, it can likewise form an inner lateral wall, that is to say can be arranged in a passage opening of the pressing body or pressing bodies and can seal or be pressed on toward the line. In general, a variant is also conceivable in which exclusively an inner elastomer part is provided, wherein the closure body is sealed in another way toward the wall or floor element, for example by direct abutment of filling material introduced into the interior space. However, there is preferably at least one elastomer part which forms the outer lateral wall, particularly preferably in combination with a further elastomer part which forms an inner lateral wall. Generally, the pressing bodies are preferably fixed in their relative position, preferably also beyond their mounting on the elastomer part. In other words, the elastomer part alone can generally also provide relative positioning of the pressing bodies, but there is preferably a further positioning means. In a preferred configuration, the pressing bodies are connected to one another via a strut, which is preferably provided from a hard plastic. Overall, a plurality or plurality of struts can be provided via which the pressing bodies are connected to one another. Reference is explicitly made to the above specifications relating to a possible shaping, the strut or a respective strut can be formed, for example, in a rod-shaped or also wall-like manner etc. In a preferred configuration, the strut(s) is / are provided from the same material as at least one of the pressing bodies, preferably hard plastic. Said struts is / are preferably formed monolithically / in one piece with one of the pressing bodies, that is to say from the same continuous material. In this case, the strut as a whole or else only one axial portion can be monolithic with the pressing body. In the latter case, the adjacent axial portion of the strut can be formed monolithically with the other pressing body (that is to say a parting plane passes through the strut, see in detail below). Irrespective of the exact position of the parting plane, the pressing bodies can preferably be connected to one another. This can be carried out in a form-fitting manner, that is to say with an axial undercut (for example by latching). Alternatively or additionally, a cohesive connection is possible; the pressing body parts can, for example, be welded to one another, for instance by friction welding or ultrasonic welding; adhesive bonding is likewise possible. This applies analogously to the fastening of the elastomer part to the pressing bodies; it can, for example, be adhesively bonded or vulcanized thereon. The elastomer part is preferably held axially in a form-fitting manner on the pressing body / bodies, that is to say it engages around the pressing body / bodies. As viewed axially, the elastomer part then forms, for example, a radially inwardly protruding collar, the inner diameter of which is smaller than the outer diameter of the respective pressing body. Preferably the elastomer part, irrespective of whether it is an inner or outer elastomer part, is additionally held radially in a form-fitting manner, that is to say there is also an undercut in relation to the radial directions. For this purpose, for example, an axially protruding collar which engages in a complementary groove of the elastomer part can be formed on the respective pressing body, for instance on the radially outer end thereof. In the preferred embodiment which relates to the inner elastomer part (which forms the inner lateral wall), this elastomer part has a radially outwardly protruding collar. The latter can be closed circumferentially per se, but this is not mandatory (which likewise applies to the collars discussed above). The collar serves for fastening or relative positioning to the pressing body; it can, for example, bear against the side face thereof facing the interior space and / or be cohesively connected thereto (for example vulcanized or adhesively bonded thereon). The inner elastomer part preferably has a front and a rear collar, wherein the front collar bears against / is fastened to the front pressing body and the rear collar bears against / is fastened to the rear pressing body. The collar or collars can generally also be arranged here outside the interior space (in each case on the outer end face wall surface), but an arrangement in the interior space (on the inner end face wall surface) is preferred. In a preferred configuration, an injection opening via which the interior space is accessible is provided in at least one pressing body. This can serve for the pressure application; alternatively or additionally, however, a pressure measurement is also possible. A valve insert which serves, for example, as a connection and / or contains a non-return valve and / or has an actuable closing function (for example a screw closure / blockage) can be arranged in the injection opening. In a preferred production of the closure body with elastomer part and pressing body, these are produced separately and then assembled. The pressing body / bodies is / are preferably injection-molded. The elastomer part / parts can likewise be injection-molded (for example from TPE); alternatively, however, production as an extrusion part (which is then brought into a ring shape and the ends of which are connected to one another, for example adhesively bonded) is also possible, for example. According to a preferred embodiment, the pressing bodies are produced separately, particularly preferably as injection-molded parts. They are then assembled and preferably connected to one another, in particular in a materially integral and / or form-fitting manner. Combinations are also possible here; a form fit can, for example, determine the correct assembly position in which the form-fitting connection then hardens (for example an adhesive). With regard to a preferred assembly of the closure body in a wall or floor element, reference is explicitly made to the above disclosure. The variants with a closure body from elastomer part and pressing body / bodies can also be combined in the form of the following aspects: 1. Closure for sealing against a wall or floor element and / or against a line, havinga closure body,wherein the closure body is provided with an interior space. 2. Closure according to aspect 1, in which the closure body has an elastomer part which forms at least one outer lateral wall of the closure body or at least one inner lateral wall of the closure body. 3. Closure according to aspect 2, in which at least one end face wall of the closure body is formed by a pressing body made of a harder material than the elastomer part. 4. Closure according to aspect 3, in which the pressing body delimits the interior space axially. 5. Closure according to one of the preceding aspects, in which both end face walls of the closure body are respectively formed by a pressing body made of a harder material than the elastomer part, wherein the pressing bodies are preferably connected to one another via a strut which extends through the interior space. 6. Closure according to aspect 5, in which the strut is formed from the same material as at least one of the pressing bodies, preferably is monolithic with the at least one pressing body. 7. Closure according to one of aspects 2 to 6, in which both end face walls of the closure body are respectively formed by a pressing body made of a harder material than the elastomer part, wherein the elastomer part forms at least the outer lateral wall of the closure. 8. Closure according to aspect 7, in which the elastomer part sits on at least one of the pressing bodies in a form-fitting and / or force-fitting manner, preferably forms an axial and / or radial form fit with the at least one pressing body as viewed in an axial section. 9. Closure according to one of aspects 2 to 6, in which both end face walls of the closure body are respectively formed by a pressing body made of a harder material than the elastomer part, wherein the elastomer part forms at least the inner lateral wall of the closure. 10. Closure according to aspect 9, in which the elastomer part has a radially protruding collar which bears against at least one of the pressing bodies and / or is cohesively connected thereto. 11. Closure according to one of aspects 3 to 10, in which at least one pressing body has an injection opening via which at least a part of the interior space can be acted on with a fluid for pressing the elastomer part. 12. Method for producing a closure according to one of aspects 3 to 11, in which the elastomer part and the at least one pressing body are produced separately and then assembled. 13. Method according to aspect 12 for producing a closure according to one of aspects 5 to 8, wherein- the pressing bodies are produced separately and then assembled;- the elastomer part is assembled with the pressing bodies. 14. Method according to aspect 13, in which the pressing bodies are cohesively connected to one another and / or latch to one another. 15. Use of a closure according to one of aspects 1 to 14 for sealing against a wall or floor element and / or against a line. 16. Use according to aspect 15, in which the closure body is biased / pressed by introducing a fluid into at least a part of the interior space, in particular the elastomer part is pressed on radially outward or inward. 17. Use according to aspect 16, in which the fluid is an injection material which hardens after introduction into at least the part of the interior space. In more general terms, various closure body variants which can then relate both to structural forms with elastomer body (for example produced additively or from assembled parts) and also to structural forms with elastomer part and pressing bodies can be combined in the form of the following aspects: 1. Closure (1) for sealing against a wall or floor element (2) and / or against a line (3), havinga closure body (600),wherein the closure body (600) is provided with an interior space (50). 2. Closure (1) according to aspect 1, in which the interior space (50) is provided such that the closure body (600) can be widened more easily radially / in the radial direction than axially / in the axial direction. 3. Closure (1) according to one of the preceding aspects, in which the closure body (600) has an axial strut (25, 625) which extends axially through the interior space (50). 4. Closure (1) according to aspect 3, in which the two axial ends of the axial strut (25) are each connected to an end wall (11a, b) of the closure body (600). 5. Closure (1) according to aspect 4, in which the two axial ends of the axial strut (25) extend without being connected to a lateral wall (15, 16) of the closure body (600). 6. Closure (1) according to one of the preceding aspects, in which the closure body (600) is an elastomer body (10). 7. Closure (1) according to aspect 6, in which the elastomer body (10) is a generatively constructed part. 8. Closure (1) according to aspect 7, in which a build direction (300) of the elastomer body (10) lies tilted with respect to an axial direction. 9. Closure (1) according to aspect 6, in which the elastomer body (10) is assembled from a first elastomer body part (10.I) and a second elastomer body part (10.II). 10. Closure (1) according to one of aspects 6 to 9, in which the interior space (50) is provided with a circumferential cavity (55). 11. Closure (1) according to aspect 10, in which the interior space (50) comprises an outer intermediate space (57) which is arranged radially between the circumferential cavity (55) and an outer lateral wall surface (16.2). 12. Closure (1) according to aspect 10 or 11, in which the elastomer body (10) has a passage opening (9) for passing through a line (3), wherein the interior space (50) comprises an inner intermediate space (56) which is arranged radially between the circumferential cavity (55) and an inner lateral wall surface (15.1). 13. Closure (1) according to aspect 11 or 12, in which the elastomer body (10) has a radial strut (26, 27) which extends radially through the outer intermediate space (57) and / or the inner intermediate space (56). 14. Closure (1) according to one of aspects 11 to 13, in which the circumferential cavity (55) is fluidically decoupled from the outer intermediate space (56) and / or the inner intermediate space (56). 15. Closure (1) according to one of aspects 6 to 14, in which the interior space (50) comprises a chamber structure (60), namely a plurality of chambers (61) which, however, are still fluidically connected to one another. 16. Closure (1) according to one of aspects 6 to 15, in which a stiffening element (505a, 505b) made of a harder material than the elastomer body (10) is provided in at least one end face wall (11a, b) of the elastomer body (10). 17. Closure (1) according to one of aspects 6 to 16, in which a pressing body (105a, b) made of a harder material than the elastomer body (10) is provided on at least one end face (10a, b) of the elastomer body (10). 18. Closure (1) according to aspect 17, in which the pressing body (105a, b) is also a generatively constructed part, in particular is constructed in one piece with the elastomer body (10). 19. Closure (1) according to aspect 17 or 18, in which the pressing body (105a, b) is part of a clamping device (100) with a clamping bolt (106) and the pressing body (105a, b) and thus the elastomer body (10) can be biased / pressed by tightening the clamping bolt (106). 20. Closure (1) according to one of aspects 6 to 19, in which the elastomer body (10) has an injection opening (45) via which at least a part of the interior space (50) can be acted on with a fluid for pressing the elastomer body (10). 21. Closure (1) according to one of aspects 1 to 5, in which the closure body (600) has an elastomer part (610, 710) and a pressing body (620, 620a, 620b), wherein the elastomer part (610, 710) forms at least one outer lateral wall (16) of the closure body (600) or at least one inner lateral wall (15) of the closure body (600), and wherein the pressing body (620, 6201, 620b) delimits the interior space (50) axially. 22. Closure (1) according to aspect 21, in which both end face walls (11a, 11b) of the closure body (600) are respectively formed by a pressing body (620, 620a, 620b) and an outer elastomer part (610) forms the outer lateral wall (16) of the closure (1) and an inner elastomer part (710) forms the inner lateral wall (15) of the closure (1). 23. Method for producing a closure (1) according to one of aspects 6 to 20, with the exception of aspect 9, in which the elastomer body (10) is generatively constructed. 24. Use of a closure (1) according to one of aspects 1 to 22 for sealing against a wall or floor element (2) and / or against a line (3). 25. Use according to aspect 24 of a closure (1) according to one of aspects 6 to 20, in which the elastomer body (10) is biased / pressed by tightening a clamping bolt (106). 26. Use according to aspect 24 or 25, in which the closure body (600), in particular elastomer body (10), is clamped by introducing a fluid into at least a part of the interior space (50). 27. Use according to aspect 26, in which the fluid is an injection material which hardens after introduction into at least the part of the interior space (50). The invention is explained in more detail below on the basis of exemplary embodiments, wherein a distinction is also not made in detail between the different claim categories. In detail, Fig. 1 shows a closure having an elastomer body in an opening in a wall or floor element through which a line passes;Fig. 2 shows a closure having an elastomer body and a device biased / pressed as an alternative to Fig. 1;Fig. 3 shows a further closure having an elastomer body, in a configuration modified to Fig. 2;Fig. 4a shows a first elastomer body in a sectional side view (longitudinal section);Fig. 4b shows the first elastomer body in a section perpendicular to the axis;Fig. 5a shows a second elastomer body in a sectional side view (longitudinal section);Fig. 5b shows the second elastomer body in a section perpendicular to the axis;Fig. 6a shows a third elastomer body in a sectional side view (longitudinal section);Fig. 6b shows the third elastomer body in a section perpendicular to the axis;Fig. 7 shows in a schematic representation, a method for producing one of the elastomer bodies of Figs. 4a-6b;Fig. 8 shows an elastomer body in an axial section, which is likewise provided with an interior space, but has been produced alternatively;Fig. 9 shows an intermediate step during the production of the elastomer body according to Fig. 8;Fig. 10 shows an intermediate step during the production of an elastomer body which is additionally equipped with stiffening elements;Fig. 11 shows a part of the elastomer body according to Fig. 10 in an axial view;Fig. 12 shows a closure constructed from pressing bodies and an elastomer part in an axial section;Fig. 13 shows a closure which, in comparison with Fig. 12, has a further elastomer part and forms a passage opening. Fig. 1 shows a closure 1 for sealing against a wall or floor element 2 and against a line 3. The closure 1, constructed as a so-called press seal in Fig. 1, is inserted into an opening 5 in the wall or floor element 2 and seals radially outward against a wall 2.1 radially delimiting the opening 5 and radially inward against an outer wall surface 3.1 of the line 3. For this purpose, the closure 1 has an elastomer body 10 and a clamping device 100, with which the elastomer body 10 can be axially compressed and consequently pressed on radially. In this case, the elastomer body 10 is a generatively / additively constructed part, that is to say constructed in layers from a previously shapeless / neutral material, see below in detail. In this case, the elastomer body 10 is constructed with an interior space 50, that is to say it has a cavity in its interior. In the course of production, this cavity can still be filled with non-solidified material which is then emptied at the end of the generative build-up via an opening (not illustrated here) which is then closed. In the present example, the interior space 50 is placed relatively closer to the line 3 than to the wall 2.1, which can, for example, reduce the pressing force acting on the line 3 (and can, for example, prevent damage in the case of a sensitive line 3). In the variant according to Fig. 1, the clamping device 100 has in each case one pressing body 105a, 105b on each end face 10a, b of the elastomer body 10, and a clamping bolt 106 connecting the pressing bodies 105a, 105b to one another. By tightening the clamping bolt 106, the pressing bodies 105a, b can be moved axially towards one another and the elastomer body 10 can thus be axially compressed and thus pressed on radially. As can also be seen from the sectional illustration / section view, there can be a plurality of clamping bolts distributed circumferentially; likewise, the pressing bodies 10a, b can be segmented circumferentially (not illustrated or visible in Fig. 1). Fig. 2 also shows a closure 1 having an elastomer body 10, on the end faces 10a, b of which in each case one pressing body 105a, b is arranged. These pressing bodies 105a, b are likewise connected to one another via bolts 107, but in contrast to Fig. 1 in a static arrangement. The bolt 107 therefore predefines a defined axial distance from the pressing bodies 105a, b; by contrast, the pressing force is achieved via a pressure application of the interior space 50. For this purpose, the clamping device 100 has a pressure application means 120 shown schematically here, which is connected via a connecting piece 125 to an injection opening 45 of the elastomer body 10. The pressure application means 120 can be, for example, a pump via which a defined overpressure can be set in the interior space 50. Alternatively, however, a gas cartridge (not shown here) can also be provided, for example, as the pressure application means 120, which can be connected via the connecting piece 125 and then activated, for example, by breaking open a predetermined breaking point. As an alternative to an action with air / gas, a liquid can generally also be introduced into the interior space 50. Irrespective of the fluid in detail, the connecting piece 125 can be provided, for example, in the form of a one-way valve which then automatically closes the pressurized interior space 50. A further possibility for pressure application consists in introducing an injection material which is still flowable during introduction, but hardens in the interior space 50. For this purpose, for example, a two-component material, for instance based on hard or polyurethane, can be provided, the components of which are brought together directly before introduction into the interior space 50 and then harden in the interior space 50. In comparison with Fig. 1, the interior space 50 from Fig. 2 has a greater volume in relation to the elastomer body 10. In this case, however, structures not shown in the schematic representation according to Fig. 2 can be present in the interior space 50, see below in detail. This likewise applies to the elastomer body 10 of the closure 1 according to Fig. 3, on the end faces 10a, 10b of which no pressing bodies 105a, 105b are arranged. However, a structure 20 indicated only schematically here passes through the interior space 50 of the elastomer body 10 and brings about a directed deformation of the elastomer body 10 during the pressure application of the interior space 50. The structure 20 provides a stronger connection between the two end walls 11a, 11b of the elastomer body 10 than between the inner lateral wall 15, which forms the passage opening 9 for the line 3, and the outer lateral wall 16, the outer lateral wall surface 16.2 of which is pressed against the wall, not shown here, of the opening 5. Fig. 4a shows a possibility for configuring an elastomer body 10 having an inner structure 20 in detail. A sectional side view is shown, wherein the sectional plane contains an axis 200 about which the outer lateral wall surface 16.2 is axisymmetric (representation analogous to Figs. 1-3). The elastomer body 10 has a plurality of axial struts 25 which pass through the interior space 50, wherein some of the axial struts 25 can be seen in FIG. 4a in section and others in side view. The axial struts 25 are each connected to the end walls 11a, 11b, but not to the lateral walls 15, 16. Accordingly, the axial expansion is delimited and the radial expansion is promoted. Fig. 4b shows the same elastomer body 10, wherein the sectional plane in this case lies perpendicularly to the axis 200. The view therefore falls axially into the interior space 50, and the individual axial struts 25 can each be seen in section as substantially point-shaped. Alternatively, however, a respective axial strut 25 could also have, for example, an elongated shape in the section, for instance an elliptical or linear shape, that is to say extend in a lamella-like manner / lamella-shaped between the end walls 11a, b. In the section according to Fig. 4b, the inner and the outer lateral wall 15, 16 can furthermore be seen as walls which are each self-contained in the circumferential direction 201. The front end face wall 11a according to Fig. 4a cannot be seen in Fig. 4b, the view falls onto the rear end face wall 11b. Generally, within the scope of the present disclosure, the same reference signs designate the same parts or parts with a comparable function and reference is in this respect always also made to the description of the respective other figures. Fig. 5a shows an elastomer body 10 in a sectional side view analogous to Fig. 4a. The interior space 50 is constructed in a subdivided manner in this case, namely comprises, on the one hand, a circumferentially self-contained cavity 55, wherein reference is made below at the same time to the section perpendicular to the axis according to Fig. 5b for illustration. In addition to the cavity 55, the interior space 50 comprises an inner intermediate space 56 and an outer intermediate space 57. In relation to the radial directions 202 perpendicular to the axis 200 (illustrated in Fig. 5a), the inner intermediate space 56 is arranged between the inner lateral wall surface 15.1 and the cavity 55 and the outer intermediate space 57 is arranged between the cavity 55 and the outer lateral wall surface 16.2. The intermediate spaces 56, 57 are fluidically decoupled from the cavity 55, that is to say when a fluid is applied to the cavity 55, the latter does not pass into the intermediate spaces 56, 57. For a transmission of the pressing force radially inward and radially outward, the respective intermediate space 56, 57 in each case passes through a plurality of radial struts 26, 27. These, like the axial struts 25 of Figs. 4a, b, are constructed in one piece with the remaining elastomer body, that is to say in the course of generative production from the same elastomer material. In the variant according to Fig. 6a, the interior space 50 of the elastomer body 10 comprises a chamber structure 60, namely a plurality of chambers 61. These are connected to one another via connecting channels 62, specifically both axially (cf. the section parallel to the axis according to Fig. 6a) and also in the circumferential direction 201 (cf. the section perpendicular to the axis according to Fig. 6b). Since the chambers 62 are also connected circumferentially, they likewise form a circumferential cavity 55 (which otherwise also applies in Figs. 4a / 4b). Furthermore, there is also an inner intermediate space 56 and an outer intermediate space 57 in the variant according to Figs. 6a, b. However, in contrast to the variant according to Figs. 5a, b, these intermediate spaces 56, 57 are not fluidically decoupled from the circumferential cavity 55 or the chamber structure 60, but are connected thereto via radial channels 63. Fig. 7 illustrates in a schematic representation a possibility for producing an elastomer body 10 discussed here. The build-up of the elastomer body 10 is carried out on a build-up platform 310 which can be raised and lowered relative to a trough 315. The trough 315 is filled with a liquid resin which hardens under the action of UV radiation. The UV irradiation is carried out here through the transparent trough base, wherein the irradiation unit 325 is represented only schematically here. It comprises a laser source 326 and a tiltably mounted mirror 327. With the latter, the laser beam 330 can be moved in a scanning manner over the trough base, that is to say over the lowered build-up platform 310 or the part of the elastomer body 10 already built up at a respective time. The resin 320 polymerizes and solidifies only where UV irradiation takes place. The elastomer body 10 is constructed in layers, that is to say sequentially, from layers 10.1-10.3. The first layer 10.1 lies here on the build-up platform 310, wherein the build-up platform is then raised a distance within the first layer 10.1 after the selective solidification. The second layer 10.2 is then built up before the build-up platform 310 for the third layer 10.3 is raised again, etc. In the present schematic representation, a build direction 300, in which the layers 10.1-10.3 follow one another, lies parallel to the axial direction of the elastomer body 10. However, it is preferably arranged tilted with respect to the axis 200 thereof (cf. the schematic sketch), that is to say the elastomer body 10 accordingly sits on the build-up platform 310 to some extent tilted. In detail, the build-up is carried out on the basis of a computer model 400 of the elastomer body 10, which computer model is broken down into individual layers (slicing) in order to generate the control signals 330 for the production device 350, which results in the region to be solidified in each layer 10.1-10.3 and therefore to be irradiated. Fig. 8 shows an elastomer body 10, which is likewise provided with an interior space 50. An axial section is represented, that is to say, the axis 200 lies in the sectional plane. The elastomer body 10 represented is provided for a blind closure, namely for closing an opening without a line. Alternatively, however, it could also be provided with a passage opening, that is to say, for example, analogously to Fig. 4a, b, additionally have an inner lateral wall (which forms a passage opening for passing through the line). In the assembled state, the elastomer body 10 lies with its outer lateral wall 16, specifically its outer lateral wall surface 16.2, sealingly against a wall delimiting the opening (not represented here, compare Fig. 1 for illustration). In this case, the elastomer body 10 can, for example, be assembled analogously to Fig. 1 by biasing / pressing pressing bodies arranged on the end faces, that is to say axially compressed and consequently pressed on radially. Alternatively, however, the interior space 50 can also be subjected to pressure with a fluid, compare Figs. 2 and 3 with associated description. The interior space 50 is formed as a whole in a connected manner, but in Fig. 8 the sectional plane runs through a plurality of axial struts 25. In the present example, these are each formed in a rod-shaped manner, that is to say, as viewed axially, point-shaped, see Fig. 4b. Alternatively, however, the axial struts 25 can also be provided with a certain extent in the circumferential direction, that is to say in the form of walls. The elastomer body 10 according to Fig. 8 is not constructed generatively from the elastomer material, but is assembled from a first elastomer body part 10.I and a second elastomer body part 10.II, compare also Fig. 9 for illustration. The first elastomer body part 10.I forms the front end face wall 11a. The second elastomer body part 10.II forms the rear end face wall 11b, but additionally also the outer lateral wall 16 and the axial struts 25. In this case, however, the second elastomer body part 10.2 is open away from the rear end face wall 11b, for which reason it can be produced in a molding method. This is preferably carried out by injection molding, for example from TPE. The first elastomer body part 10.I can likewise be produced in a molding method (pressing into a mold or injection molding), but it can also be cut out as a disk from a plate-shaped elastomer. Irrespective of these details, the elastomer body parts 10.I, 10.II are produced separately and then joined together, for example adhesively bonded to one another. This is represented schematically in Fig. 9 by an adhesive layer 500 applied to the first elastomer body part 10.I. Fig. 10 shows an elastomer body 10 or elastomer body parts 10.I, 10.II, reference is in this respect also made to the above description. In Fig. 10, however, stiffening elements 505a, 505b are additionally arranged in the end face walls 11a, 11b. These are surrounded by the elastomer material; they can, for example, be injection-molded as insert parts during the production of the elastomer body parts 10.I, 10.II. Fig. 11 shows the first elastomer body part 10.I in an axial view and illustrates the shape of the stiffening element 505a (embedded in the elastomer material, therefore represented by dotted lines). Instead of the star shape, a lattice or net shape would likewise be possible; alternatively, however, the stiffening element 505a can also be formed as a continuous plate (e.g. circular). Irrespective of the shape in detail, the stiffening elements 505a, 505b which are provided, for example, from a hard plastic can stabilize the end face walls 11a, 11b. In this way, for example if the interior space 50 is acted upon by a fluid, the deformation can be directed primarily onto the lateral wall / walls, that is to say a higher pressure can be built up radially. Fig. 12 shows a closure 1, the closure body 600 of which is not constructed or is not constructed exclusively from elastomer material. Nevertheless, the closure body 600 forms an interior space 50 which can be acted upon by a fluid for mounting the closure 1, compare the preceding description in detail. The closure body 600 has an elastomer part 610 which forms an outer lateral wall 16. With this or the outer lateral wall surface 16.2, the closure body 600 lies during assembly against a wall delimiting the opening, compare Figs. 2 and 3 with associated description. Furthermore, the closure body 600 has pressing bodies 620, in the present example a front pressing body 620a and a rear pressing body 620b. The pressing bodies 620 are provided from a harder material than the elastomer part 610, in this example from hard plastic (for example ABS). The pressing bodies 620 delimit the interior space 50 axially, and additionally they carry the elastomer part 610. The front pressing body 620a forms the front end face wall 11a of the closure body 600, the rear pressing body 620b forms the rear end face wall 11b. Struts 625, which are likewise provided from hard plastic in the present case, extend through the interior space 50. With regard to a possible shaping, reference is made to the above description of the struts from elastomer material, the hard plastic struts can be formed in a rod-shaped or also wall-like manner etc. In the exemplary embodiment according to Fig. 12, the struts 625 are formed monolithically with the rear pressing body 620b, and the component can be produced as an injection-molded part. This applies analogously to the front pressing body 620a. After the injection molding, the pressing bodies 620 are assembled and connected to one another, for example in a materially integral manner. This can be carried out, for example, by ultrasonic welding or also adhesive bonding. As an alternative to the representation shown, a parting plane arranged axially centrally is also possible, and the two pressing bodies 620 can then be produced using the same molding tool. The elastomer part 610 is pulled onto the assembled pressing bodies 620, that is to say is expanded to some extent radially and then brought axially into position. As can be seen from the axial section according to Fig. 12 (axis 200 lies in the sectional plane), the elastomer part 610 is held axially in a form-fitting manner on the pressing bodies 620, that is to say with an undercut in relation to the axial direction. Furthermore, an axially protruding collar 621a, 621b is formed in each case on the radially outer, circumferential-side ends of the pressing bodies 620, which collar engages in each case in a complementary groove of the elastomer part 610. A radial form fit is thus additionally created. The interior space 50 is accessible via an injection opening 645, which is formed in the present case in the rear pressing body 620b. A valve insert 650, via which, for example, a pressure application means can be connected, for example a pump or cartridge gun (see above), is arranged in the injection opening 645. However, the valve insert 650 can also be used for the pressure measurement in order to check the correct action of the interior space 50. The valve body 650 can be constructed more complexly than represented here, for example have a non-return valve and / or a closure. Fig. 13 shows a further closure 1 with a closure body 600, which is in principle comparable to that according to Fig. 12 (reference is in this respect made to the above description). However, the closure body 600 according to Fig. 13 is not designed as a blind closure, but for passing through a line (not represented). In this respect, the closure body 600 forms a passage opening 9. For this purpose, a further elastomer part 710 is provided which forms an inner lateral wall 15 which delimits the passage opening 9. During assembly, the line can be guided through the passage opening 9, it can be guided here with some play and / or be covered with a lubricant. If the interior space 50 is then subjected to pressure with a fluid, the lateral wall 15 is pressed toward the line. The inner lateral wall surface 15.1 lies sealingly against the line. At the same time, the outer lateral wall 16 is pressed radially outward against a wall, see above in detail. The elastomer part 710 has a front collar 711a and a rear collar 711b. With these collars 711a, 711b, it lies in each case on the inside against the respective pressing body 620a, 620b. The collars 711a, 711b can, for example, be pressed into the sealing abutment solely by the pressure application of the interior space 50; alternatively or additionally, however, a cohesive connection is also possible.

Claims

1. Use of a closure (1), which closure (1) has an elastomer body (10),wherein the elastomer body (10) is a generatively constructed part and is provided with an interior space (50),for sealing against a wall or floor element (2) of a building.

2. Use according to claim 1, in which the interior space (50) is provided such that the elastomer body (10) can be widened more easily radially than axially.

3. Use according to one of the preceding claims, in which the elastomer body (10) has an axial strut (25) which extends axially through the interior space (50).

4. Use according to claim 3, in which the two axial ends of the axial strut (25) are each connected to an end wall (11a, b) of the elastomer body (10).

5. Use according to claim 4, in which the two axial ends of the axial strut (25) extend without being connected to a lateral wall (15, 16) of the elastomer body (10).

6. Use according to one of the preceding claims, in which the interior space (50) is provided with a circumferential cavity (55).

7. Use according to claim 6, in which the interior space (50) comprises an outer intermediate space (57) which is arranged radially between the circumferential cavity (55) and an outer lateral wall surface (16.2).

8. Use according to claim 6 or 7, in which the elastomer body (10) has a passage opening (9) for passing through a line (3), wherein the interior space (50) comprises an inner intermediate space (56) which is arranged radially between the circumferential cavity (55) and an inner lateral wall surface (15.1). 9. Use according to claim 7 or 8, in which the elastomer body (10) has a radial strut (26, 27) which extends radially through the outer intermediate space (57) and / or the inner intermediate space (56).

10. Use according to one of claims 7 to 9, in which the circumferential cavity (55) is fluidically decoupled from the outer intermediate space (56) and / or the inner intermediate space (56).

11. Use according to one of the preceding claims, in which the interior space (50) comprises a chamber structure (60), namely a plurality of chambers (61) which, however, are still fluidically connected to one another.

12. Use according to one of the preceding claims, in which a build direction (300) of the elastomer body (10) lies tilted with respect to an axial direction.

13. Use according to one of the preceding claims, in which a pressing body (105a, b) made of a harder material than the elastomer body (10) is provided on at least one end face (10a, b) of the elastomer body (10).

14. Use according to claim 13, in which the pressing body (105a, b) is also a generatively constructed part, in particular is constructed in one piece with the elastomer body (10).

15. Use according to claim 13 or 14, in which the pressing body (105a, b) is part of a clamping device (100) with a clamping bolt (106) and the pressing body (105a, b) and thus the elastomer body (10) can be biased by tightening the clamping bolt (106).

16. Use according to one of the preceding claims, in which the elastomer body (10) has an injection opening (45) via which at least a part of the interior space (50) can be acted on with a fluid for pressing the elastomer body (10).

17. Use according to one of the preceding claims for sealing against a line (3) laid through the wall or floor element (2).

18. Use according to one of the preceding claims, in which the elastomer body (10) is biased by tightening a clamping bolt (106).

19. Use according to one of the preceding claims, in which the elastomer body (10) is biased by introducing a fluid into at least a part of the interior space (50).

20. Use according to Claim 19, in which the fluid is an injection material which hardens after introduction into at least the part of the interior space (50).

21. Method for producing a closure (1) for a use according to one of the preceding claims, in which the elastomer body (10) is generatively constructed. 

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