Device for passing a cable through a base plate

Abstract

Device for passing a line through a base slab (2) made of at least one layer of concrete (36) for a building, comprising a protective tube (4) comprising at least two parts: an outer pipe (6) that can be permanently embedded in the base plate, and a dimensionally stable inner part (8) that can be moved in the outer tube, characterized in that the protective tube (4) has a dimensionally stable formwork part (10, 10') connected to the outer tube (6), which extends around and along the inner part (8), wherein the formwork part (10, 10') preferably completely surrounds the outside of the dimensionally stable inner part (8), and the formwork part (10, 10') with its inner side (28) facing the inner part (8) is in full contact with the inner part (8).

Description

Revised description pages (fair copy)

[0001] The invention relates to a device for passing a pipe through a base slab made of at least one layer of concrete for a building, comprising a protective pipe consisting of at least two parts, which has an outer pipe that can be permanently embedded in the base slab and a dimensionally stable inner part that is movable within the outer pipe.

[0002] Devices for routing cables through a floor slab are used to introduce cables, such as data or power cables, or utility lines like water or gas pipes, into a building, particularly a building without a basement. Since the actual final height or thickness of the floor slab, especially in the case of a multi-layered slab—particularly the layer thicknesses of, for example, the concrete layer and any further screed layer to be applied above the concrete layer—can vary due to manufacturing tolerances during the slab's production or changes in the possible composition of the floor slab structure, these devices, also known as service penetrations, are typically adjusted to the finished surface of the floor slab after its completion, for example, by removing sections of the device.Precisely separating the device sections is often associated with a correspondingly high amount of work and time.

[0003] From DE 10 2005 041 176 A1, a building entry point for a preferably basementless building is known for routing several cables and / or pipes through the building's foundation slab. The building entry point has several protective pipes extending through the foundation slab, each protective pipe comprising an outer pipe and an inner pipe movable within the outer pipe. A box connected to the upper ends of the outer pipes is also provided, which is embedded in the concrete layer of the foundation slab and partially surrounds the protective pipes. The box consists of a base segment and several frame segments that can be placed on and above it. During the construction of the foundation slab, more frame segments are used than are ultimately required for the final assembly of the box; the number of these is subsequently adjusted according to the finished height of the foundation slab.Due to the many individual parts, especially in the case of, for example, only a single or double house entry, the assembly and manufacturing effort for such a device is disproportionately high.

[0004] EP 0 246 219 A1, US 6 305 133 B1, and US 6 792 726 B1 disclose devices for passing conduits through a wall or floor of a building using a protective conduit. The protective conduits comprise an outer tube and an inner part movable relative to and within the outer tube. After the concrete layer is created, the outer tube and inner part are enclosed by the wall or floor material in such a way that the inner part is no longer movable relative to the outer tube.

[0005] The present invention was therefore based on the objective of demonstrating a device for passing a cable through a base plate that is easy and inexpensive to manufacture and can also be easily adapted to the respective local conditions.

[0006] The invention solves the underlying problem in a device for routing a conduit through a concrete base slab of at least one layer for a building, with the features of claim 1. In particular, the protective tube has a dimensionally stable formwork element connected to the outer tube, which extends around and along the inner part. Dimensionally stable means that the formwork element has a stiffness sufficient to absorb the lateral forces generated by the base slab material during its production and acting upon the formwork element. The formwork element is dimensionally stable in such a way that relative movement between the inner part and the formwork element is ensured even after the base slab has hardened.

[0007] The invention utilizes the fact that the dimensionally stable formwork component creates a physical separation between the base plate to be produced and the inner part, which is movable within the outer tube fixed in the base plate and the formwork component. Thus, if the inner part is a pre-used inner tube of the device, it can be adjusted to the final height of the base plate by moving it, in particular by sliding it within the outer tube. The dimensionally stable formwork component is preferably made of a material that can be cut manually, for example, with the aid of a knife.Small lateral support forces are applied by the dimensionally stable formwork component, which ensures that a sufficiently large free cross-section is created in the concrete layer or a screed layer, for example in a multi-layered floor slab, within which the inner part can be moved.

[0008] Due to its dimensionally stable design, the formwork part does not collapse, so that at least in sections a gap remains between the inside of the formwork part and the outside of the inner part, which allows the inner part to be moved by hand.

[0009] The formwork component completely surrounds the inner part of the protective tube, i.e., over its entire circumference, and extends at least along a section of the inner part. A rubber material, for example, could be used as the material for the formwork component.

[0010] Preferably, the formwork component is firmly connected to the outer tube via a section at its upper end. In particular, the formwork component is bonded to the outside of the outer tube. In another embodiment, the dimensions of the formwork component and the outer tube are coordinated so that the contact surfaces achieve a clamping effect.

[0011] A preferred embodiment of the invention provides that the formwork part, with its inner surface facing the inner part, is in full contact with the inner part. The inner part is held clamped relative to the outer tube of the device by means of the formwork part, which is also held in position by the base plate.

[0012] Preferably, the formwork element has, in the connection area with the outer tube, particularly at its end associated with the connection area, a shoulder on its inner side that increases the free cross-section of the formwork element, preferably circumferential, and by means of which the formwork element is attached to the upper end of the outer tube. Preferably, the lower end of the formwork element, with its enlarged cross-section, overlaps the upper end of the outer tube on the outside.

[0013] In a further development of the device according to the invention, the inner part with its outer surface and the outer tube with its inner surface are brought into contact with each other along a connecting section. This ensures that the inner part, preferably designed as an inner tube, is held within the outer tube embedded in the concrete layer. A frictional connection is created in the connecting section, which is designed to counteract any unintentional movement of the inner part relative to the outer tube. The frictional connection fixes the inner part to or within the outer tube in such a way that it can be moved, and in particular slid, relative to the outer tube with relatively little effort.

[0014] In one embodiment of the invention, the inner diameter of the outer tube and the outer diameter of the inner part have dimensions that are matched to each other. Preferably, the inner part has a slightly larger outer diameter compared to the inner diameter of the outer tube, thereby forming a kind of interference fit, which ensures frictional engagement between the surfaces in contact with each other.

[0015] In a further embodiment of the device according to the invention, a sealing element is arranged in the connecting section between the inner part and the outer tube. This sealing element provides a seal in the connecting section between the inner part and the outer tube, thereby preventing the ingress of contaminants or moisture into the interior of the protective tube and the escape of media flowing within the protective tube, such as gases or liquids. The sealing element, which can be designed as a sealing ring, is arranged on at least one of the components of the protective tube, i.e., on the inner part or on the outer tube. In an alternative embodiment, the inner part and the outer tube each have a sealing element arranged thereon, which creates a seal with the surface of the respective other part of the protective tube.A sealing function may be particularly necessary if the dimensionally stable formwork part is unintentionally perforated during the production of the concrete layer or screed layer, so that moisture could enter the connection area of ​​the outer pipe and inner part via the perforation on the formwork part, or gases or liquids could escape from the protective pipe.

[0016] Preferably, the inner part is an inner tube with a cylindrical inner and outer diameter, or a cylindrical mounting body, preferably made of solid material. In one embodiment, the inner tube has an outer diameter that preferably corresponds to the inner diameter of the outer tube over its entire length. This allows for a preferably large adjustment range of the inner tube relative to the outer tube, enabling the inner tube to be moved within the outer tube to align with the finished surface of the manufactured base plate. Instead of the inner tube, a cylindrical mounting body, preferably made of solid material, can be used, at least during assembly and manufacturing of the base plate. This mounting body seals the protective tube during base plate production without the need for additional aids.

[0017] A further development of the invention provides a connecting piece arranged at the free end of the inner tube, preferably for an anchor body that can be coupled to the inner tube. The connecting piece, attached to the upper end of the inner tube, forms an extension in the cross-section of the inner tube, which is preferably placed on the surface of the base plate after completion. The connecting piece serves in particular as a stop for the movable inner tube of the protective tube. This prevents the inner tube from sliding too far into the base plate in an unacceptable manner. The inner tube is preferably locked to the base plate after completion by means of an anchor body that can be coupled to the connecting piece. The anchor body has at least one anchor plate that can be coupled to the connecting piece of the inner tube and whose underside rests on the surface of the base plate.

[0018] Preferably, at least one receptacle for a fastening element that connects the inner tube to the top of the base plate is provided on the anchor body. Preferably, two receptacles for corresponding fastening elements, such as the head of a fastening screw, are provided, by means of which the anchor body is attached to the base plate. Preferably, the at least two receptacles for the fastening elements are arranged at opposite corner regions of the anchor body, which has an anchor plate. In a possible embodiment of the invention, the connecting piece can be reversibly coupled to the anchor body via a positive-locking connection, similar to a bayonet connection. The connection between the inner tube and the anchor body can thus be disconnected and re-established as often as necessary.

[0019] Preferably, a locking element for a rod body is arranged on the outer tube. This rod body holds the outer tube in its alignment before the concrete layer of the base slab is poured. The locking element has a bracket that interacts with a rod body and is attached to the outer tube of the protective tube connecting to the formwork section via a fastening element. The bracket has a receptacle for the upper end of the rod body, which is preferably designed as a ground spike. The device according to the invention is placed in the ground using the ground spike before the concrete layer of the base slab is poured, with the upper end of the rod body and the locking element coupled to it being positioned within the concrete layer of the base slab to be poured.Preferably, parts molded onto the outer tube, material-bonded connections, a clamp with a variable diameter, or the like are used as fastening elements for the bracket on the outer tube.

[0020] In another embodiment of the invention, the end of the outer tube that protrudes from the base plate on the underside during installation has a connection for a preferably flexible pipe element. The flexible pipe element, attached via the connection, allows the pipe to be deflected under the base plate with a predetermined bending radius. In a preferred embodiment of the invention, the flexible pipe element is designed to prevent deflection below a minimum bending radius. This prevents kinks in the pipes routed through the pipe elements.

[0021] According to a further development of the device according to the invention, the inner and outer tubes are made of a dimensionally stable plastic. This ensures that a minimum diameter is maintained for the pipes to pass through the base plate when creating a penetration within the base plate. Dimensionally stable plastics, such as polypropylene, polyvinyl chloride, polyamide, or acrylonitrile butadiene styrene, are preferably used as materials for the inner and outer tubes.

[0022] In a particularly preferred embodiment, the dimensionally stable formwork component is polygonally shaped at least partially along its outer circumference. The polygonal section preferably extends completely or at least substantially completely along the longitudinal direction of the formwork component, so that a portion of the polygonal section is always cast into the base plate.

[0023] The polygonal perimeter is preferably designed to form a recess with several corners in the base plate, wherein the device has an anchor body connected at its end to the inner tube for fastening the device to the base plate, which has one or more recesses for passing through a suitable fastening element, preferably a rod.

[0024] The recesses are preferably located internally and aligned adjacent to each corner of the opening in such a way that, when the device is twisted, the rods are held in the respective corner of the opening. This provides a simple method of preventing rotation, eliminating the need for drilling or dowels in the base plate: Due to the non-circular geometry of the formwork component, the resulting recess in the base plate has a corresponding negatively non-circular shape. The rods engage in the corners of this recess, so that when the device twists, they are pressed against the corner or one of the flanks of the recess that converge at the corner. In this way, the torque acting on the device can be transferred into the base plate.

[0025] In a further aspect, the invention relates to an arrangement of several devices arranged side by side for routing a cable through a building's floor slab. Such an arrangement is particularly necessary when a multi-utility service entry has to be made through a floor slab.

[0026] The invention also solves the problem underlying the device according to the invention, in that each device of the arrangement has a protective tube comprising at least two parts according to one of the preferred embodiments of the invention described above.

[0027] In the arrangement according to the invention, the formwork component surrounding a respective inner part can be easily detached, for example, by tearing it off or cutting it through, and the inner part can be lowered to the desired height above the finished base slab. The devices for routing the cables in the arrangement according to the invention are arranged in a row, running one behind the other or side by side. In another embodiment, more rows of devices arranged one behind the other or side by side can also be provided, with each such row comprising one or more devices. In one embodiment, the distance between the center axes of two adjacent devices for routing cables is less than three times the outer diameter of the protective tube.In one embodiment of the invention, the distance between the devices is defined by the anchor plates to be coupled to the protective tubes, wherein two anchor plates of immediately adjacent devices either touch each other at their end faces or are arranged at a distance of a few millimeters from each other. Preferably, one formwork part is completely wrapped around the respective outer tubes of the arrangement with its lower end and preferably connected to their outer surfaces.

[0028] The preferred embodiments or further developments described for the device according to the invention for passing a line through a base plate are also preferred embodiments of the arrangement according to the invention.

[0029] The invention is described in more detail below with reference to a preferred embodiment and the accompanying figures. These figures show: Fig. 1: a view of a device for passing a line; Fig. 2: a detailed view of the device in section according to the encirclement I from Fig. 1; Fig. 3 and Fig. 4: Detailed views of a formwork component according to Fig. 2; Fig. 5 and Fig. 6: Illustrations of a formwork component according to an embodiment of the invention; Fig. 7 and Fig. 8: Schematic representations of various embodiments of arrangements of several devices for forming a multi-utility house entry.

[0030] In Fig. 1 is a device 1 for passing a cable through a base plate 2 ( Fig. 4, Fig. 5) shown for a building not shown in detail. The device 1 comprises a protective tube 4 which extends through the entire base slab 2. The protective tube 4 has an outer tube 6 which can be permanently embedded in the base slab. The protective tube 4 also comprises a dimensionally stable inner part 8 which is movable within the outer tube and a dimensionally stable formwork part 10 connected to the outer tube 6, which extends around and along the inner part 8. A connecting port 12 is provided at the end of the outer tube 6 that protrudes from the base slab 2 on the underside, to which a flexible pipe element 14 is attached. The flexible pipe element is designed to bend only through a predetermined minimum bending radius. In one embodiment, the dimensionally stable formwork part 10 is surrounded by a preferably dimensionally unstable protective casing 15, which is shown by the dashed line in Fig. 1. This should be clarified; see also the following. Fig. 2 and Fig. 5.

[0031] Furthermore, two securing elements 16 are arranged on the outer tube, each of which is attached to a rod body 18, in particular a ground spike. The rod body 18 is used to position the device in the ground on which the foundation slab 2 for the building is to be poured. The securing element 16 has a bracket 20 arranged on the rod body 18 and a fastening element 22, which in this embodiment is designed as a securing clamp and clamps at least partially around the outer circumference of the outer tube 6.

[0032] Fig. Figure 2 shows an enlarged view of the in Fig. In detail 1 shown, the outer tube 6 and inner part 8 form a connecting section 24 along which the outer surface 27 of the inner part 8 and the inner surface of the outer tube 6 are aligned. The dimensions of the outer tube 6 and inner part 8 are selected such that the inner part 8, which is preferably a cylindrical inner tube, can move within the outer tube 6, in particular in the longitudinal direction of the outer tube 6. The formwork part 10, which is preferably designed as a tube made of one of the materials mentioned above, forms a connecting area 26 with the outer tube 6. Furthermore, the formwork part 10 has a shoulder 32 on its inner surface 28 at the end associated with the connecting area 26 and the outer tube 6, preferably circumferential, which increases the free cross-section of the formwork part 10. The formwork part 10 is attached to the upper end of the outer tube 6 via the shoulder 32.The dimensionally stable formwork element 10, in its assembled state and extending outwards around the inner part 8, exhibits sufficient dimensional stability such that, provided no forces act upon the formwork element, a sleeve is formed around sections of the outer tube 6 and the inner part 8. The dimensionally stable formwork element 10 is surrounded by the protective casing 15.

[0033] In a preferred embodiment, the formwork part has a coefficient of friction µ of less than 0.4, preferably less than 0.25, on its inner surface 28 facing the inner part 8. In a further embodiment, a coating reducing the coefficient of friction can be applied to the inner surface 28 of the formwork part 10. As shown in the figure below. Fig. As can be seen in Figure 2, a connecting piece 30 is arranged at the upper free end of the inner tube 8', which in one embodiment is used as a stop for the inner tube 8' which is placed on the top of the finished base plate 2.

[0034] Furthermore, how from Fig. 2 evident and in Fig. As shown in detail in Figure 3, the formwork part 10, designed as a sleeve, has, in addition to the shoulder 32 for receiving the outer tube 6 at its lower end, an annular shoulder 32' at its upper end. Furthermore, the formwork part 10, with its inner surface 28 facing the inner part, is fully in contact with the inner part 8, see Figure 3. Fig. 2. In an embodiment not shown in detail, a gap is formed between the inner surface 28 of the formwork part 10 and the outer surface 27 of the inner part 8. In this embodiment, the inner part 8, with its outer surface 27 in contact with the inner surface 28 of the formwork part 10, is held clamped relative to the outer tube 6 of the device 1 by means of the formwork part 10, which is also fixed vertically via the base plate 2. Due to the dimensionally stable design of the formwork part 10, the inner part 8 can still be moved relative to the formwork part 10 and thus also relative to the outer tube 6.

[0035] How further Fig. Figure 4 shows that the cross-section of the formwork part 10 is cylindrical, with recesses 34 being provided on the top side of the sleeve part 10 for a positive locking of the inner part 8 with the formwork part 10 for a rotationally fixed connection.

[0036] The Fig. 5 and Fig. Figure 6 shows an embodiment of a formwork part 10' according to the invention. The cross-section of the formwork part 10' is preferably non-cylindrical along substantially its entire length, or at least along that section which, in the cast state, is still enclosed by the base plate. Preferably, the cross-section is polygonal, and particularly preferably rectangular. On the upper side of the sleeve part 10', recesses 34 are provided for a positive locking of the inner part 8 with the formwork part 10 for a rotationally fixed connection.

[0037] A dimensionally stable plastic is used to form the inner and outer tubes 6, 8'. This ensures that forces acting on the protective tube 4 during the construction of the base slab are reliably absorbed, resulting in minimal to no deformation due to external forces acting on the protective tube 4. The outer tube 6 and the formwork element 10 are connected in such a way that, during the construction of a concrete layer for the base slab 2, the outer tube and the formwork element are positioned section by section within the concrete layer. In addition to the material and / or force-fit connection acting between the outer tube 6 and the formwork element 10, both components are further secured relative to each other by the concrete layer. The construction of the base slab 2 is described here using the example of a multi-layered base slab.The same procedure basically applies to a single-layer base plate made of only one layer of concrete when using the device.

[0038] The inner part 8, which in one embodiment is designed as a cylindrical inner tube 8', is adjusted upwards in height until it forms a sufficiently large connection section 24 with the outer tube 6. Then, an insulating layer and a screed layer are created above the concrete layer. A floor slab 2 produced in this way has a lower concrete layer, an insulating layer as an intermediate layer, and a screed layer as the uppermost layer. Optionally, the uppermost layer of the floor slab 2 above the screed layer can also be formed by an additional floor covering, such as tiles. After completion and curing of the screed layer, the dimensionally unstable formwork part 10, 10' is shortened in height, and the inner tube 8' with its connecting piece 30 is adjusted to the top surface of the floor slab 2 so that the connecting piece 30 rests flush with, for example, the screed layer of the floor slab 2. To secure the inner part 8, or rather theTo fix the inner pipe 8', which remains physically separated from the generated screed layer 40 by the formwork part 10 and is therefore permanently movable, to the base plate 2, for example, the ones in the . Fig. 7 and Fig. The anchor bodies 42, 42' shown in Figure 8 are used. In one embodiment, the anchor bodies 42, 42', each having at least one anchor plate 44, 44', are placed over the connection stub 30 of the inner tube 8' and fixed to the base plate 2 by means of fastening means attachable to the base plate 2, which engage in receptacles 46 for fastening means on the anchor plate 44, 44'.

[0039] The Fig. 7 and Fig. 8 show, in contrast to the one in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. Figure 6 shows individual devices 1 guided through a base plate 2, each consisting of several devices 1 arranged side by side for routing a cable through a building's base plate. Such an arrangement forms a multi-utility service entry point, through which several cables, such as data cables, power cables, gas cables, or water cables, can be routed from below the building through the base plate into the building's interior. As the Fig. 7 and Fig. As illustrated in Figure 8, an arrangement of several devices 1 can comprise a single row of several devices arranged side by side, or several rows of devices arranged at right angles to each other. Fig.Figure 8 shows a multi-row arrangement, consisting of a row with three devices 1 and a row with only one device 1. Such an arrangement of devices can have any number and any pattern of devices 1 arranged side by side, wherein each arrangement can have one, two or three rows with one, two or more devices in a row, and wherein each row can contain a different number of devices.

[0040] Similar or identical components are designated with the same reference numerals. Reference symbol list 1 Device 2 Base plate 4 Protective tube 6 Outer pipe 8 Inner part 8' inner tube 10, 10' formwork section 12 connection port 14 pipe element 16 safety element 18 rod bodies 20 brackets 22 bells 24 Connecting section 26 Connection area 27 Outside 28 Inside 30 connection spigots 32, 32' paragraph 34 Exclusion 36 upper end Section 38 40 cross-section 42, 42' Anchor body 44, 44' Anchor plate 46 Mounting points for fasteners

Claims

Device for passing a conduit through a base slab (2) made of at least one layer of concrete (36) for a building, comprising a protective tube (4) comprising: an outer tube (6) that can be permanently embedded in the base slab, and a dimensionally stable inner part (8) that can be moved within the outer tube, characterized in that the protective tube (4) has a dimensionally stable formwork part (10, 10') connected to the outer tube (6), which extends around and along the inner part (8), wherein the formwork part (10, 10') preferably completely surrounds the outer surface of the dimensionally stable inner part (8), and the formwork part (10, 10') with its inner surface (28) facing the inner part (8) is in full contact with the inner part (8). Device according to claim 1, characterized in that the outer and inner tube (6, 8') are made of a dimensionally stable plastic. Device according to claim 1 or 2, wherein the dimensionally stable formwork part (10') is at least partially polygonal in shape on its outer circumference. Device according to claim 3, wherein the polygonal circumference is configured to form a recess with several corners in the base plate, and wherein the device has an anchor body (42, 42') connected at its end to the inner tube (8) for fastening the device to the base plate (2), which has one or more recesses for passing through each of a fastening means, preferably a rod. Device according to claim 4, wherein the recesses are oriented internally adjacent to each corner of the recess such that the fastening means are held in the respective corner of the recess when the device is torsioned in the inserted state. Arrangement of several devices (1) arranged side by side for passing a line through a base plate (2) of a building, each comprising a protective tube (4) of at least two parts according to one of the preceding claims.

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