INSTALLATIONSDOSE

Description

[0001] The invention relates to an installation box for electrical installations, in particular lamps. BACKGROUND OF THE INVENTION

[0002] In buildings, installation boxes are used to attach electrical switches, sockets, lamps, appliances, or for branch connections at designated locations in the building. These boxes are often encased in concrete. Installation boxes include, for example, inlet boxes, ceiling anchors, flush-mounted boxes, distribution boxes, and the like. The installation of the installation box in a concrete surface (walls, ceilings, floors) takes place before concreting. Conventional installation boxes are attached to a formwork element of the concrete wall to be poured using nails, hot glue, or magnets, for example, in such a way that a front-facing installation opening of the box faces the formwork and is thus accessible to an installer after pouring for further installation of electrical devices, such as lamps and switches, etc.

[0003] EP1961093 relates to a ceiling box with at least one cable entry and one device opening as well as device holders for fastening a cover or a device, wherein the inner cross-sectional area of ​​the ceiling box is larger at the upper part of the ceiling box than at the device opening.

[0004] DE19825115 refers to a box whose side wall includes radial openings for electrical conduits at a defined height. This box is divided transversely to its longitudinal axis and consists of two subsequently connectable box sections, one of which is attached to the formwork wall. To facilitate handling, it is proposed to arrange the dividing plane between the two box sections at the height of the radial openings, so that each radial opening is divided into two opening sections. Each of the two opening sections is a component of one of the two associated box sections.

[0005] Installation boxes are known from the prior art. These typically have a cylindrical or cuboid-shaped housing and form an installation space accessible via the installation opening. The installation opening is usually closed by a cover or similar during the casting process. In addition, the installation boxes often have a plurality of conduit entries distributed around the perimeter of the side wall. These conduits are intended for attaching electrical conduits, particularly corrugated conduits, and for routing connecting cables routed therein into the installation space. The electrical conduits (conduits) are usually attached to the installation box before the concrete is poured and after the installation box has been positioned on the formwork wall.

[0006] A disadvantage of the prior art boxes is the time-consuming installation of the electrical conduits before pouring the concrete. Due to the limited access to the installation space from the back of the installation box, the corresponding conduits are often inserted too deeply into the box, necessitating subsequent shortening of the conduits from the front after pouring. PRESENTATION OF THE INVENTION

[0007] One object of the invention is to provide an improved installation box that further simplifies the installation of electrical conduits and subsequent electrical installation. In particular, an installation box is to be provided that simplifies installation in a small installation space.

[0008] An installation box for electrical installations according to the invention comprises a cover, a tubular intermediate piece, and a base. The base can be used to fasten the installation box to a building wall surface. For example, the base can be used to fasten it to a formwork wall of a concrete wall to be cast. The cover is operatively connectable to a first end of the intermediate piece. The base is advantageously operatively connectable to a second end of the tubular intermediate piece. Alternatively, the second end of the intermediate piece can also be integrally connected to the base. An installation opening can be arranged in the base, which allows an installer access to an installation space of the installation box for the installation of electrical installations. However, the installation opening is advantageously closed by a cover in an initial state before the electrical installations are installed.The intermediate piece and the cover can together form a base body of the installation box. The intermediate piece and the cover can also be connected to each other via a type of hinge or at least one retaining strap and / or be molded together via this.

[0009] The cover comprises at least one insertion opening for inserting an electrical conduit into the installation space. In the initial state (before the conduit is inserted), the insertion opening is closed by a detachable wall section. Furthermore, when the wall section is removed and the cover is operatively connected to the intermediate piece, the insertion opening adjoins the intermediate piece, at least in part. When the cover is not operatively connected to the intermediate piece, a conduit can be inserted from the side (perpendicular to a central axis of the conduit) into the insertion opening of the cover. There, it can subsequently be secured using the intermediate piece. The intermediate piece can additionally have at least one sealing lip at its first end for fixing and sealing the conduit against the cover.This design of the base body enables quick installation, allowing the pipe to be inserted to fit precisely. Subsequent cutting of the pipe to length after installation is also avoided, further reducing the work required by the installer. The pipe can be secured in the insertion opening quickly and easily by means of a functional connection between the cover and the tubular intermediate piece. This assembly can also be carried out (if the base is designed separately from the intermediate piece or the base body) before the base body is effectively connected to the base, or before the installed installation box is positioned on the formwork wall. This facilitates installation, particularly in tight spaces and / or hard-to-reach areas.

[0010] The installation space is advantageously also formed in some areas by the cover. For this purpose, the cover can have a recess that at least partially surrounds or forms a receiving space. The recess, or the receiving space, can be accessible via a mounting opening in the cover. When the installation box is mounted, the recess, or the receiving space, forms part of the installation space. To form the recess, the cover can be thin-walled and, as seen from the installation space, can be designed to bulge or protrude outwards, so that the recess is formed on the side of the cover facing the installation space.

[0011] The cover is advantageously designed in the shape of a truncated pyramid. The cover can have a cover section and a plurality of angled side sections which form the truncated pyramid-like cover. For example, a base surface of the truncated pyramid (at the end of the cover facing the intermediate piece) can be designed in the shape of a polygon. A cover surface of the cover opposite the base surface can also have the shape of a polygon. The above-described recess in the cover is advantageously arranged on the base surface, so that the cover has a thin-walled design. The cover surface is arranged on a (thin-walled) cover section of the truncated pyramid-like cover. The cover section is advantageously arranged substantially perpendicular to the axial direction. The cover section can be arranged at a distal end of the installation box when the installation box is in its assembled state.The distal end is arranged opposite the base in the axial direction. Furthermore, the truncated pyramid-shaped cover can have several side sections arranged at an angle to one another. The side sections and the cover section are advantageously thin-walled and polygonal in shape. For example, some side sections can be triangular and others quadrangular. The at least one detachable wall region can be arranged, at least in part, on an angled side section. This results in a space-saving (in the axial direction) insertion of the pipe into the cover. Advantageously, however, only one pipe insertion is provided per side section. Alternatively or additionally, the cover can be designed, at least in part, to be dome-shaped, conical, in the form of a multi-sided pyramid, or in another way that bulges away from the installation space.

[0012] The cover advantageously has an edge. The edge can be tubular in the axial direction. This is advantageous because, when the installation box is in the assembled state, it can be arranged so as to overlap the intermediate piece at least partially in the axial direction. If the cover is truncated pyramid-shaped, the side sections can adjoin the edge. In an initial state, in which the at least one insertion opening is closed by a detachable wall region, the edge can be designed to run all the way around the cover. In this case, the detachable wall region extends over the edge up to the mounting opening. When the at least one wall region is detachably removed, the edge is thus interrupted over the circumference of the cover (with respect to a central axis of the installation box extending in the axial direction).At least one insertion opening then borders on the mounting opening.

[0013] Depending on the application, a fastening receptacle for attaching electrical installations can be arranged on the inside of the cover (facing the installation space). The fastening receptacle is advantageously arranged at the distal end of the cover, such as the cover section. The fastening receptacle can be designed as a recess, eyelet, or similar. The fastening receptacle can, for example, be a blind hole into which a suspension can be screwed. Furthermore, the fastening receptacle can comprise an insert, in particular a metallic insert. The insert advantageously comprises a thread for receiving the suspension. The insert can be injection-molded or pressed in. For example, the insert can be a press-in bushing or press-in nut. Depending on the design, the fastening receptacle can extend through the cover section.

[0014] The tubular intermediate piece can have at least one step in the axial direction. The step can be arranged between the first end and the second end. The step allows for different configurations of the first and second ends. For example, the tubular intermediate piece can have a substantially round cross-section at the second end and a square cross-section at the first end. The substantially round cross-section can correspond to the cross-section of the installation opening. Advantageously, a cross-sectional area of ​​the tubular intermediate piece increases across the step and from the second end to the first end in the axial direction.

[0015] The tubular intermediate piece is advantageously designed to be operatively connectable to the cover at its first end. For example, the cover can be designed to be pluggable and / or snap-in onto the first end of the tubular intermediate piece. However, other designs are also possible. The second end of the intermediate piece, opposite the first end, can, as described above, either be integrally connected to the base or be operatively connectable to the base via the second end. A non-integral design offers the above-described advantage of simple assembly of the tubes independent of the base. In order to connect the base and the intermediate piece to one another, further (first) operative connecting means can be arranged on the base and / or on the intermediate piece. Furthermore, (second) operative connecting means can be provided to connect the intermediate piece to the cover.The second operative connection means can be arranged on the cover and / or on the intermediate piece. Advantageously, the second operative connection means are arranged at least partially on the edge of the cover, if present. The second operative connection means also ensure that the pipe inserted between the intermediate piece and the cover is secured in the installation space. Advantageously, the first and / or second operative connection means are locking elements.

[0016] Depending on the design of the installation box, the intermediate piece may have a small axial extension compared to the base or cover. When the installation box is assembled, the base and cover preferably extend together over 80%, in particular over 90%, of the installation box in the axial direction. This enables a low installation height for the box and space-saving installation. When the installation box is assembled, the first end of the intermediate piece is advantageously located within the cover and the second end of the intermediate piece is located within the base.

[0017] The detachable wall section of the cover can be cut out along at least one defined contour. When the at least one wall section is cut out, the insertion opening running along the contour for inserting an electrical conduit into the installation space is formed. At least one predetermined breaking element is advantageously arranged along this contour. The at least one predetermined breaking element can, for example, be formed by a thin section of the cover. A different material can also be used, at least in some areas, to create a predetermined breaking point. When manufacturing the installation box by injection molding, a two-component process can be used for this purpose, for example.

[0018] The insertion opening is divided into a first zone for receiving a pipe and a second zone for inserting the electrical pipe laterally into the first zone.

[0019] A contour of the first zone is advantageously designed such that it follows the outer circumference of the pipe to be inserted, i.e., the contour of the first zone is preferably round. The edge of the insertion opening of the first zone can, for example, engage in the trough of a corrugated pipe and form a sealing contact therewith. At the same time, this pipe is thus fixed, for example, perpendicular to the local section of the cover and can no longer slip out of the insertion opening during assembly.

[0020] In order to further fix the electrical conduit in the insertion opening or in the first zone, the contour or the insertion opening has at least one undercut after the wall area has been cut out, so that a conduit pushed into the first zone of the insertion opening locks behind the undercut. For good positioning of the conduit, the at least one undercut is advantageously arranged between the first and the second zone. In one variant, an undercut can be arranged on both sides of the insertion opening, so that an omega-shaped insertion opening is created. The omega-shaped insertion opening can be designed such that the second zone of the insertion opening borders on a circular contour of the first zone over an angle of 130° - 170° (degrees). To make it easier to cut out the wall area, it can be surrounded at least partially by at least one stiffening element.If the at least one insertion opening is arranged in a side section, as described above, at least one undercut can be formed in a plane of the side section, so that a pipe inserted there locks behind the undercut.

[0021] In order to be able to insert different pipes with different diameters into the installation box or into the insertion opening, the cover can have several contours that are arranged at least partially around one another. For example, the detachable wall section can be divided into an inner detachable wall section and at least one outer detachable wall section. When the inner wall section is removed along a first contour, an insertion opening for smaller pipe diameters is formed, while when the inner and outer wall sections are removed along a second contour, a larger insertion opening for inserting larger pipes is formed. The outer wall section advantageously borders the inner wall section at least in part.The area between two directly adjacent wall sections is advantageously reinforced separately by a stiffening element so that the unwanted breakage of an adjacent wall section is avoided as far as possible.

[0022] For improved fixation of a pipe inserted into the insertion opening, a fixing collar can be arranged, alternatively or additionally, at least in part around the insertion opening. The fixing collar advantageously protrudes substantially perpendicularly from the corresponding section of the cover. When installed, the fixing collar engages a (wave) valley of an installed, corrugated pipe. The wider fixing collar prevents the pipe from slipping on the narrower separation edge of the removable wall section, thus enabling better positioning of the pipe.

[0023] The hinge for attaching the cover to the intermediate piece is advantageously designed in two parts, with a first part arranged to the left of an insertion opening and a second part arranged to the right of the same insertion opening. Alternatively, two retaining straps can be provided. The retaining straps are advantageously arranged circumferentially to the left and right of an insertion opening. The retaining straps are advantageously designed, or long enough, so that a pipe can be mounted between the retaining straps in the insertion opening located between them.

[0024] The base advantageously has a peripheral edge or bead around the installation opening or around the cover of the base, which prevents concrete from flowing into the installation opening or onto the cover when the installation box is in contact with a formwork wall. The cover is advantageously molded onto the base via a thin peripheral section so that it can be removed for assembly and after the pipes and installation box have been installed in the concrete wall. Areas located further outwards radially (in relation to a central axis of the installation opening or next to the cover) are advantageously offset further back in the axial direction towards the cover. In this way, the installation box is only minimally visible in the concrete surface.If necessary, the base can have additional support elements on a side facing away from the cover (and thus, when installed in the concrete wall, on a side facing the formwork wall). These support elements, however, only rest on the formwork wall at specific points and better position or align the installation box. Furthermore, the base can have an indicator in the area of ​​the cover, such as one or more pins, to make it easier for an installer to locate a cast-in installation box in the concrete wall.

[0025] The base advantageously includes fasteners for attaching the installation box to a formwork wall. These fasteners can, for example, be receptacles for nails and / or screws. Alternatively, the fastener can be a magnet arranged in the base, which positions the installation box against a metal formwork wall. However, positioning via an adhesive film, adhesive layer, or similar is also possible. Depending on the design of the installation box, the fasteners can be arranged on the cover of the base, which can close the installation opening.

[0026] Aspects of the invention are explained in more detail with reference to the exemplary embodiments shown in the following figures and the associated description. They show: Fig. 1A first variant of an installation box according to the invention in an assembled state in a perspective view; Fig. 2The installation box according to Figure 1 in a sectional view from the side; Fig. 3The installation box according to Figure 1 in an unassembled state with the wall section removed and with a lid.

[0027] Figure 1 to Figure 3 show a first variant of an installation box 1 according to the invention. Figure 1 and Figure 2 show an assembled state, while Figure 3 shows an unassembled state.

[0028] The installation box 1 according to the invention comprises a base body 3 with a tubular intermediate piece 4 and a cover 5, which can be operatively connected to one another. The installation box 1 further comprises a base 2 for supporting the installation box on a formwork wall (not shown) and advantageously has fastening means 22 for fastening the installation box 1 to the formwork wall. The cover 5 can be fastened to a first end 8 of the intermediate piece 4. The base 2 can be operatively connected to a second end 9 of the tubular intermediate piece 4. The tubular intermediate piece 4 is also attached and / or molded onto the cover 5 via two retaining straps 21.

[0029] In Figure 2it can be seen that the base 2 and the cover 5 extend over 80%, in particular over 90%, of the installation box 1 in the axial direction when the installation box 1 is in the assembled state. The first and second ends 8, 9 of the intermediate piece 4 are each arranged in the cover 5 and in the base 2, respectively, so that the intermediate piece 4 is arranged almost completely in the cover 5 and in the base 2. For the operative connection of the cover 5 to the intermediate piece 4, the cover 5 has an edge 19 which, when the installation box 1 is in the assembled state, can be plugged onto the first end 8 of the intermediate piece 4. The section shown also shows that the cover 5 forms a recess 13 with a receiving space 30 which, when assembled, makes up a substantial part of the installation space 7. This is made possible by the curved shape of the cover 5.The receiving space 30 is accessible via a mounting opening 29 in the cover 5. The cover 5 is essentially designed in the shape of a truncated pyramid with several side sections 12 arranged at an angle to one another and a cover section 15 at a distal end 14. On the inner side 17 of the cover section 15, a fastening receptacle 18 is provided for receiving, for example, a hook or the like for attaching electrical installations. The fastening receptacle 18 is accessible from the receiving space 30, or from the installation space 7. In the case shown, the fastening receptacle is a blind hole 18 which extends through the cover section. However, the fastening receptacle can also be designed as a different type of recess, eyelet, or the like. For a material-saving design, the fastening receptacle 18 can have ribs 31 on the inner side 17 and / or the outer side 16 of the cover 5 for reinforcement.In the case shown, multiple ribs 31 are arranged on the cover section 15 on the inner side 17 and the outer side 16 (see . Figure 1 and Figure 3 ). In Figure 1 It is also apparent that the cover 5 may have additional stiffening elements 28 along the outer side 16.

[0030] Several removable wall areas 11 are arranged in the cover 5. Figure 3illustrates the removed state of a wall region 11. In the removed state of the wall region 11, it releases an insertion opening 10 for inserting a pipe into the receiving space 30. The insertion opening 10, or the at least one detachable wall region 11, borders on the mounting opening 29 and extends over the edge 19 of the cover 5. In a removed state of the wall region 11 and a mounted state of the cover 5 on the intermediate piece 4, the insertion opening 10 adjoins the intermediate piece 4 at least in part. Thus, in the mounted state, the pipe is clamped and fixed between the cover 5 and the intermediate piece 4. First operative connecting means 23 are provided for the operative connection of the intermediate piece 4 to the base 2. Second operative connecting means 24 are provided for the operative connection of the intermediate piece 4 to the cover 5 and for fixing the pipe.The intermediate piece 4 also has a sealing lip 20 at its first end 8 for sealing the pipe against the cover 5. The removable wall region 11 can be removed along at least one defined contour 26, 27. At least one predetermined breaking element can be arranged along a contour 26, 27 for removal. In . Figure 3the removed wall region 11 is visible, which was cut out along a contour 27. The wall region 11 essentially has an omega shape, which forms an undercut on both sides of the insertion opening 10, behind which the pipe can lock. In order to be able to insert different pipes with different diameters into the installation box 1 or into the insertion opening 10, the cover 5 can have a plurality of contours 26, 27 arranged at least partially around one another. This forms an inner and an outer detachable wall region 11 that partially surrounds the inner one. When the inner wall region 11 is cut out along the first contour 26, an insertion opening 10 for smaller pipe diameters is formed, while when the inner and outer wall regions are cut out along the second contour 27, a larger insertion opening 10 for inserting larger pipes is formed.

[0031] As also in Figure 3As can be seen, the base 2 has an installation opening 6. In its initial state, this is closed by a cover 25. In the case shown, fastening means 22 in the form of blind holes for fastening by means of nails are arranged on this, which serve to fasten the installation box 1 to a formwork wall (not shown). Other fastening types are also conceivable, however. Furthermore, the cover 5 has radially further outwardly located regions (with respect to a central axis of the installation opening, or the cover 25), which are arranged further back in the axial direction towards the cover 5. In this way, the installed installation box 1 is only minimally visible on a concrete surface.To ensure stable positioning of the installation box on the formwork wall, the base 2 has four support elements 33 on a side facing away from the cover 5 (and thus, when mounted in the wall, on a side facing the formwork wall), which, however, only rest on the formwork wall at specific points. As shown in . Figure 2 As can be seen, there is also an indicator 32 on the cover 25, which can more easily indicate to a fitter the position of the installation box 1 in a plastered concrete surface. LIST OF REFERENCE SYMBOLS 1 Installation box 18 Mounting bracket 2 base 19 edge 3 Basic body 20 sealing lip 4 side wall 21 Retaining strap 5 cover 22 Fasteners 6 Installation opening 23 first effective bonding agents 7 Installation room 24 Second active connection means 8 First end 25 Lid 9 Second ending 26 First contour 10 Insertion opening 27 Second contour 11 Wall area 28 stiffening element 12 Page section 29 Mounting opening 13 Deepening 30 recording room 14 Distal end 31 rib 15 Deck section 32 Display means 16 outside 33 Support element 17 inside

Claims

1. Installation box (1) for electrical installations, comprising a. a base (2) for fastening the installation box (1) to a formwork wall, with an installation opening (6) arranged in the base (2), b. a tube-shaped intermediate part (4) and a cover (5) interconnected with a first end (8) of the tube-shaped intermediate part (4), wherein c. at least one insertion opening (10) for inserting an electrical tube into an installation space (7) of the installation box (1) is arranged in the cover (5), and d. the at least one insertion opening (10) is closed in an initial state by a detachable wall area (11), and in a detached state of the wall area (11) and an interconnected state of the cover (5) to the intermediate part (4) adjoins at least in some areas the intermediate part (4), e. characterized in that the insertion opening (10) has at least one undercut after detaching the wall area (11), in order to fix an electrical tube in the insertion opening (10), wherein the undercut divides the insertion opening into a first zone for receiving a tube and a second zone for laterally inserting the electrical tube into the first zone, such that a tube inserted into the first zone of the insertion opening (10) latches behind the undercut.

2. Installation box (1) according to patent claim 1, characterized in that the cover (5) has a depression (13) which, in the installed state, forms part of the installation space (7).

3. Installation box (1) according to one of the preceding patent claims, characterized in that the cover (5) is designed in the shape of a truncated pyramid.

4. Installation box (1) according to patent claim 3, characterized in that the cover (5) in the shape of a truncated pyramid has a cover section (15) and a plurality of angled side sections (12).

5. Installation box (1) according to patent claim 4, characterized in that the at least one insertion opening (10) is arranged in a side section (12).

6. Installation box (1) according to patent claim 4 or 5, characterized in that a fastening receiver (18) for the fastening of electrical installations is arranged on an inner side (17) of the cover section (15).

7. Installation box (1) according to one of the preceding patent claims, characterized in that the intermediate part (4) has a sealing lip (20) at its first end (8) for sealing the tube against the cover (5).

8. Installation box (1) according to one of the preceding patent claims, characterized in that the cover (5) is formed on the intermediate part (4) by means of a hinge or at least one retaining band (21).

9. Installation box (1) according to one of the preceding patent claims, characterized in that the installation opening (6) is closed in an initial state by a cap (25).

10. Installation box (1) according to one of the preceding patent claims, characterized in that the base (2) and the cover (5) extend in an assembled state of the installation box (1) over 80%, in particular over 90%, of the installation box (1) in the axial direction.

11. Installation box (1) according to one of the preceding patent claims, characterized in that the tube-shaped intermediate part (4) can be interconnected to the base (2) with a second end (9) opposite the first end (8).

12. Installation box (1) according to patent claim 11, characterized in that, in an assembled state of the installation box (1), the first end (8) of the intermediate part (4) is arranged inside the cover (5) and the second end (9) of the intermediate part (4) is arranged inside the base (2).

13. Installation box (1) according to one of the preceding patent claims 11 or 12, characterized in that the tube-shaped intermediate part (4) has at least one stage in the axial direction, which is arranged between the first end (8) and the second end (9).

14. Installation box (1) according to one of the preceding patent claims 11 to 13, characterized in that the tube-shaped intermediate part (4) has a cross-section in the form of a polygon at the first end (8) and a substantially round cross-section at the second end (9).

15. Installation box (1) according to patent claim 13 or 14, characterized in that the tube-shaped intermediate part (4) increases in cross-sectional area over the stage and from the second end (9) to the first end (8).

16. Installation box (1) according to one of the preceding patent claims 1 to 10, characterized in that the tube-shaped intermediate part (4) and the base (2) are integrally connected to one another.