DE8704304U1 - Prefabricated roller shutter box made of abutting brick blocks - Google Patents

Abstract

In a prefabricated roller shutter box (1) of moulded bricks (2, 3, 4, 5) which have in cross section a roller shutter box profile in the form of an inverted U of two side webs (6, 7) and a centre web connecting these and are connected to one another by bonding agents and reinforcements, the reinforcements consist of rails (14, 15) resting against the ends (12, 13) of the two side webs (6, 7), extending essentially over the entire length of the roller shutter box (1) and connected to the ends by means of bonding agents, which reduces production time and manual effort. Independently of this, reinforcement rods can be used, particularly in the case of slotted moulded bricks. <IMAGE>

Description

Prefabricated roller shutter box made of abutting brick blocks ^?

The invention relates to a prefabricated roller shutter box made of abutting brick blocks, which in cross section form a roller shutter box profile in the shape of an upside-down U made up of two side webs and a central web connecting them and are connected to one another by reinforcements.

A prefabricated roller shutter box of this type is known (DE-PS 25 36 086), in which reinforcement slots are provided on the end surfaces of the side webs and on the inner surfaces of the brick blocks that form the roller shutter box profile. The disadvantage of this type of construction is that the naturally relatively narrow reinforcement slots have to be laboriously filled by hand using a trowel with binding agent, primarily cement mortar, in order to embed the reinforcement bars. This form of manual work is also time-consuming and therefore labor-intensive.

The object underlying the invention is, in contrast, to create a roll-top shelf that can be manufactured more easily and in a more time-saving manner with less manual effort.

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This object is achieved by the features mentioned in the characterizing features of claims 1 or 10.

According to claim 1, the rails forming the reinforcements can be applied to the ends of the side webs quickly and easily, even by unskilled workers, or the rails underneath can be coated with binding agent and the bricks can then be placed on top. Since the rails are subjected to tensile stress in the installed position of the roller shutter box, they ensure sufficient strength, particularly when the rails are designed as profile rails and the ends of the side webs overlap at least on one of their sides. A profile rail in an angle or U-shape is known to be more rigid than a flat rail that would only be attached to the end surfaces of the side webs using thin-bed or plastic mortar, quite apart from the fact that the strength of the arrangement is increased due to the increase in the area available for connection to the bricks with a profile rail. A further increase in the strength of the connection between brick and rail or profile rail or angle rail is achieved by breaking through the same, such that the binding agent enters and possibly passes through these breakthroughs in the form of punchings or the like, which not only causes a further increase in surface area, and thus an increase in the binding surface, but also anchors the reinforcement to the brick blocks.

In the known design described above, it is also necessary/additionally to install a bucket rail on the

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outside of the roller shutter box if the roller shutter box is to be inserted into masonry that is to be plastered, which naturally leads to a further increase in the manufacturing effort due to time-consuming manual work. In contrast, according to the invention, a plaster strip extending essentially vertically from the side webs of the brick moldings can be arranged on the outside of one of the rails or profile rails in such a way that it forms part of the profile, which can be extruded, for example, regardless of which suitable rust-proof material the profile is made of, for example stainless steel, galvanized steel, aluminum or plastic. A one-piece design of the respective profile can also be produced by bending a flat material, e.g. sheet metal.

To further increase the strength of the connection between rails and bricks, the openings or cutouts in the rails can be opposite recesses in the brick blocks, which are preferably molded and can be groove-shaped. It is also possible to provide the profile rails with webs running in their lengthwise direction, projecting towards the side webs, which fit into correspondingly molded slots in the brick blocks.

If you want to increase the bending strength of the roller shutter box, especially against the stresses that occur when transporting it to the construction site, then additional reinforcements in the form of continuous/essentially smooth reinforcements over the entire roller shutter can be installed in the two inner corners and/or on the outside of the central web of the brick blocks forming a roller shutter box.

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provide rails extending the length of the box and connected to the bricks using a binding agent. It is advisable for both the corners mentioned and the angle rails fitted to them to be rounded. The rails on the outside of the central web can be made of flat or T-shaped material, whereby in the latter case a corresponding continuous slot is formed in the bricks.

As is well known, roller shutter boxes are not only used for plastered masonry, but also for exposed masonry, so that in such a case, for aesthetic reasons alone, rails of the type described, which are placed on the ends of the side webs of the brick blocks, cannot be used, as they are openly visible and look unsightly.

In this case, the invention offers a further solution to the problem mentioned at the beginning according to claim 10 in that the brick blocks of a roller shutter box have, at least in their corners, where the side walls and the central web meet, continuous, aligned elongated holes in which reinforcing rods embedded in binding agents are inserted. These inserted reinforcing rods ensure the required strength of the roller shutter box and can also be used, for example, in roller shutter boxes intended for plaster masonry, possibly in addition to existing rails or profile rails, where a particularly long length of the roller shutter box makes additional reinforcements seem expedient. In addition, the brick blocks can also have channels in the area of the ends of the two side webs that are aligned with one another and in which reinforcements are arranged.

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The brick blocks used to construct the prefabricated roller shutter box can also be so-called brick blocks, and can be reinforced before assembly if necessary, whereby a brick board forms the central web and two brick boards form the side webs of the upside-down U. The brick boards can be connected by edge grooves in the brick board forming the central web on the one hand and in the brick boards forming the side webs on the other hand, which form channels for the holding of reinforcing bars and binding agents when joined together. In addition, metal end plates can be attached to the front sides of a roller shutter box according to the invention by means of dowels or bushings that sit on the reinforcing bars, or spring clips or the like ₍ on the brick blocks in such a way that a particularly stable connection is produced. It is particularly advantageous that these end plates can already have bearings for the respective roller shutter shaft.

The use of cuboid bricks enables thinner walls, as U-shaped or angled bricks require thicker walls to avoid warping during the firing process. Brick boards are much less prone to warping and are therefore cheaper in terms of both material consumption and production costs. The brick boards can of course be made in advance from a series of cuboids and reinforced before a roller shutter box is made from three brick boards. Preferably, however, the cuboid bricks forming the central web and the side webs, preferably slotted bricks, are placed in a U-shaped form lying on their backs, whereby the bricks forming the central web and the side webs have grooves on their edges that form channels with each other, and then the reinforcements are attached or inserted, after which the binding agent is pressed in.

In addition, regardless of the shape of the individual bricks, which ultimately lead to a roller shutter box profile with a U-shaped cross section, U-shaped stiffening plates can be installed between two front

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abutting brick blocks of the box can be inserted as reinforcement, in which openings are provided for the necessary reinforcement, if necessary, which are aligned with the corresponding channels or holes in the brick blocks. In particular with longer roller shutter boxes, this prevents deformation of the side webs as a result of greater stresses and the roller shutter box is given greater dimensional rigidity. If these reinforcement panels are provided with at least one eyelet protruding upwards on their central web _between the sheet metal, this also makes it easier to transport the prefabricated roller shutter boxes or to install them on the building site, not to mention that these protruding suspension eyes can be mortared in on the building site and thus provide additional strength to the connection between the roller shutter box and the wall of the building in question.

The stiffening plates or sheets serving as reinforcements give the prefabricated roller shutter box according to the invention such rigidity that it is possible to replace the brick board forming the central web with a rigid foam molding, for example made of polystyrene or polyurethane, so that additional, particularly good thermal insulation is provided, in particular if the foam molding has an extension on one side which lies along the inside of one of the two side webs, preferably the side web inside the building.

The usual structural steels can be used as reinforcement for use in the channels or hole channels of the brick blocks.

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of a prefabricated roller shutter box according to the invention, the brick moldings, each of which forms a roller shutter box, are put together with or without an intermediate layer of binding agent and then the reinforcing bars are inserted into the aligned channels of the brick moldings, after which binding agent is pressed into the channels. Since the binding agent, for example cement mortar, can dry out too early due to the absorbency of the brick and the friction of the binding agent on the perforated channel wall would be relatively high, which would require considerable pressure, the binding agent is expediently introduced using a lance, which is inserted parallel to a reinforcing bar into the same channel and is withdrawn accordingly during the filling process. It has proven useful to withdraw the lance in stages so that the space between the reinforcing bar and the channel wall is only exposed to pressure in the area of the moldings, but not in the area of their joints. It is also possible to proceed in such a way that the binding agent flows into the joints between two molded blocks without any spraying out between the end faces of two abutting molded blocks.

Particularly advantageous, but more complex, is the use of pipes as reinforcing rods, whose outer diameter is smaller than the inner diameter of the !channels and whose walls have perforations distributed along the circumference of the pipe. On the one hand, this results in improved stability of the roller shutter box, corresponding to better dimensional stability of a pipe compared to a solid rod, on the other hand, the pipes themselves can also be

as so-called lost lances, which then leaves no possibility of filling the pipe in stages and the gap between the reinforcing pipe and the channel walls. Only by using an additional lance, which is inserted into the respective pipe and then withdrawn accordingly during the filling process, can it be ensured that binding agent is pressed into the pipe in stages and enters through its openings into the space between the pipe and the ^target stone, and in each case where this is desired.

A mortar press can be used easily and advantageously to introduce the binding agent or mortar into the hole channels of the shaped blocks that form the roller shutter box.

According to the invention, either end rails or reinforcing rods or tubes embedded in channels are used to reinforce the free ends of the side webs of the U-profile of the prefabricated roller shutter box, as already explained. In both cases, rails made of metal or plastic can be provided, with or without plaster strips, whereby the ends of the side webs or the reinforcing rails already present there and these one plaster strip or plaster strips or rails that do not have them are each shaped in such a way that the rails can be snapped onto the ends of the shaped blocks or as second rails onto the already present reinforcing rails. These rails expediently have two elastically bendable webs that span the ends of the side webs and have inward-pointing projections at their ends that fit into corresponding recesses at the ends of the side webs.

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of the shaped blocks. If a reinforcement rail is already present at these ends, the corresponding

Recesses naturally present on this first rail, |

wherein the snap-on rail represents a second rail. |

The use of slotted bricks generally leads to |

better thermal insulation properties, weight reduction and material savings. |

The invention and its advantageous embodiments are explained in more detail below with reference to embodiments shown in the drawing.

It shows: j

Fig. 1 shows a first embodiment of the roller shutter box ' according to the invention;

Fig. 2 a detail of the embodiment according to the

Fig. 1 in section;

Fig. 3 shows a further detail of Fig. 1 in section;

Fig. 4 is a sectional view of a further embodiment corresponding to Fig. 2;

Fig. 5 is a sectional view corresponding to Fig. 3 of a further embodiment;

Fig. 6 is a sectional view of a further embodiment corresponding to Figs. 2 and 4;

Fig. 7 is a sectional view of a further embodiment corresponding to Fig. 6;

Fig. 8 is a plan view of a section of a

further embodiment; Jt

Fig. 9 a side view of the embodiment according to Fig. 1

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Fig. 10 is a plan view of another embodiment;

Fig. 11 is a side view of the embodiment of Fig. 10;

Fig. 12 Front views of two halves of roller shutter boxes which have been manufactured using the embodiments according to Figs. 8 to 11;

Fig. 13 a detail of the roller shutter box shown on the right in Fig. 12;

Fig. 14 a detail of the roller shutter box shown on the left in Fig. 12;

Fig. 15 shows a detail of Fig. 13 in perspective view;

Fig. 16 shows a detail of a cover plate holder in the roller shutter box according to Fig. 17;

Fig. 17 another embodiment of the roller shutter box.

Fig. 18 Cross-section of the end of a side web with a first, mortared, metal rail serving as reinforcement and a second, snap-on rail having a plaster strip, on an enlarged scale;

Fig. 19 is a front plan view of a cover plate of a roller shutter box;

Fig. 20 is a side view of the embodiment of Fig. 19, partially in section;

Fig. 21 is a plan view corresponding to Fig. 19 of a different embodiment;

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Fig. 22 is a side view of the embodiment according to Fig. 20;

Fig. 23 is a plan view of a stiffening plate;

Fig. 24 a cross-section through a roller shutter box constructed from brick boards;

Fig. 25 a cross-section through a roller shutter box according to Fig. 23, in which the brick board forming the central web is replaced by a foam molding.

The prefabricated roller shutter box 1 shown in Fig. 1 consists of brick blocks 2, 3, 4 and 5 which abut one another at the end and which, in cross section, have a roller shutter box profile in the form of an upside-down U ¹ S made up of two side webs 6 and 7 and a central web connecting them. They are connected to one another by binding agent and reinforcements introduced between their abutting surfaces, which are indicated in Fig. 1 by lines 9, 10 and 11.

The reinforcements consist of rails 14 and 15 which are located at the ends 12 and 13 of the two side webs 6 and 7 of each of the brick blocks 2, 3, 4 and 5 forming the respective roller shutter box 1, extend essentially over the entire length of the roller shutter box 1 and are connected to the side webs 6 and 7 by means of a binding agent.

In this embodiment, the side and middle webs of the brick blocks 3, 4 and 5 are not designated separately, since all brick blocks are designed the same.

.../12

The rails 14, 15 (Fig. 2 and 3) are expediently designed as profile rails which overlap the ends 12, 13 of the side webs 6, 7 at least on one of their sides. In the case of the profile rail 14 shown on the left in Fig. 1 according to Fig. 2, it overlaps with an angled web 16 the side 18 of the end 12 facing the interior 17 of the roller shutter box 1. In the case of the profile rail 15 shown in the foreground in Fig. 1, which sits on the end 13 of the side web 7, it overlaps the end 13 on both sides 19 and with side webs 21 and 22.

In the embodiment shown, a plaster strip 23 or 24 extending essentially vertically away from the side web 6 or 7 is arranged in one piece on the outer sides of the two profile rails 14 and 15, which means that the roller shutter box shown in perspective in Fig. 1 is intended for installation in plastered masonry.

The profile rails are attached using a binding agent, which can be plastic-based adhesive or cement mortar or a combination of both, in such a way that an intimate connection between the bricks and the profile rails is achieved.

Rails used for reinforcement are made of a rust-proof material such as stainless steel, galvanized steel, aluminum or plastic and can be manufactured, for example, by bending (Fig. 2) or by extrusion (Fig. 3).

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The rails or profile rails or angle rails (the profile rail 14 according to Fig. 2 can be referred to as such) are preferably perforated, which is particularly clear from Fig. 3; see punched holes 25. It goes without saying that when the profile rails 14 or 15 are placed on top, the introduced binding agent (not shown) penetrates the holes 25 to the outside and creates additional anchoring between the profile rails 14, 15 and the ends 12, 13 of the sixth webs 6, 7. The strength of the connection is further improved by recesses 26 in the brick blocks 2 to 5, which are opposite the perforations or holes 25, the recesses 26 expediently having the shape of continuous grooves, which thus extend over the entire length of the adjoining brick blocks 2 to 5.

The embodiments according to Figs. 4 and 5 show profile rails 14' and 15', which essentially correspond to the embodiments according to Figs. 2 and 3, but each have an additional

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Fig. 6 shows a fourth embodiment with a profile rail 29 which corresponds to the profile rail 15' according to Fig. 5 in the arrangement of its webs 30 and 31 and its support strips 32 and 33, but unlike the latter, it is not extruded but is made from bent flat material. Furthermore, the webs 30 and 31 each have two continuous grooves 26 lying one above the other. The holes in the webs 30 and 31 are only indicated by dot-dash lines. On the underside of the end 13 of the side web 7, the grooves shown in Fig. 3 are omitted.

The embodiment of a side web 7' shown in Fig. 7 again shows a similar design to Figs. 3 and 6 of a bent profile rail 34 with plaster strips 35 and 36, which, in addition to webs 37 and 38 laterally adjacent to the end 13' of the side web ⁷¹ , also has a central web 39 which engages in a corresponding slot 40 formed in the middle of the end 13' and, moreover, as the dash-dotted line 41 indicates, is also perforated, which makes the resulting locking by the binding agent particularly clear.

In Figs. 8 to 12, further designs of extruded profile rails 42 and 43 are shown. While the profile rail 42 essentially corresponds to the embodiment according to Fig. 7, but has additional holes 25', while otherwise the same reference numerals as in Fig. 7 have been used, in the profile rail 43, in addition to the projecting web 39', a projecting web 44 is provided, furthermore only one plaster strip 45 is present. Fig. 12 shows the installation of the profile rails 42 and 43, whereby in the case of the profile

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rail 42 only one slot 40 as in the embodiment according to Fig. 7 ■, in the case of the profile rail 43" however two slots 46 and 47 are provided in the ends 48 and 49 of the side webs 10 and 51 of the brick halves 52 and 53 shown on the front. A dividing line 54'. illustrates the difference between the two brick halves.

In the inner corners 55, 56 of the brick blocks, additional reinforcements can be provided in the form of continuous angle rails 57 that extend essentially over the entire length of the roller shutter box and are connected to the brick blocks by means of a binding agent (Figs. 12 and 13). As Fig. 13 shows particularly clearly, both the corners and the angle rails 57 that are adapted to them can be rounded. Here too, the angle rails 57 can have openings, as indicated by dash-dot lines, opposite which are continuous grooves 58 formed in the brick. Fig. 15 shows such an angle rail 57 in a diagrammatic view, where the holes 59 can also be seen. Even where these rails 57 are not required for static reasons in the installed position of the respective roller shutter boxes, since the profile rails 14, 15, 42, 43, which are subject to tensile stress and sit on the ends 12, 13, 48 and 49 of the side webs 6, 7, 50, 51, are easily sufficient to absorb the loads, the additional rails 57, which are seated in the corners 55, 56 according to Fig. 12, may be required to absorb the changing loads that occur during transport, for example loads where the profile rails are subjected to compression, so that the angle rails 57, subject to tensile stress, can absorb these additional bending forces. These tasks can also be performed by T-profile rails 57' fastened with binding agent to the top of the roller box or to the outside of the central web 58 or 58' (Fig. 12), the webs 68 of which engage in appropriately formed grooves 56' of the brick moldings.

A further solution to the problem of the invention, which can also be used in addition to the profile scribing,

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the left half of Fig. 12 rises. It is also already indicated in the roller shutter box j shown in Fig. 1, rear half of the quarter, as well as in Figs. 2 and 4. It is important that exclusively or additionally the brick blocks of a roller shutter box have continuous, aligned hole channels 59 in the statically advantageous places, thus at least in their corners, where the side webs 6, 7 or 50, 51 and the middle web 8 or 48' merge into one another, in which reinforcing rods 61 embedded in binding agent 60 are inserted (Fig. 12).

When assembling the bricks at the front to form a row that forms the roller shutter box, appropriately shaped wire or sheet metal anchors can be added to form transport suspensions, through which the reinforcement is inserted.

The brick blocks can also have aligned hole channels 68 in the area of the ends of the two side webs, in which reinforcements are arranged, as shown in Figure 24. This figure is a cross-section through an embodiment in which the brick blocks are brick boards 70, 71, 72 provided with hollow holes, which may also be separately reinforced, which is not shown in the present case, but the brick board 70 forms the central web and the two brick boards 71 and 72 form the side webs of the U standing on the head. This embodiment will be discussed in more detail below.

Fig. 16 and 17 show a possibility of providing the respective end brick blocks 2' and 5 ¹ of a roller shutter box 1 * with a circumferentially formed inner fold 65 or 65', into which a

End cap 66, 66" insertable and by means of binding agent \

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existing profile rails are provided |

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The respective end cover 66 or 66' engages in the inner fold 65 or 65' by means of a projecting, circumferential collar 67 or 67".

In contrast, Fig. 19 and 20 on the one hand and Fig. 21 and 22 on the other hand show a further, preferred option for the respective end brick blocks 73 ■

or 74 at the front. For this purpose, end plates 75 and 76, preferably made of metal, are attached to the front sides of the brick 73 using dowels or, as shown in Fig. 20, using bushings 78 sitting on locking rods 77. The end plates 75 and 76 also have holes 79 for attaching the bearings for the respective roller shutter shaft (not shown), as well as further holes 80 for hanging transport hooks, and finally holes 81 for introducing binding agents, which will also be discussed in more detail below.

The embodiment according to Figs. 21 and 22 differs from that according to Figs. 20 and 19 only in that instead of the reinforcing rod 77 a reinforcing tube 82 is used, so that separate holes 81 (see Fig. 19) in the end plate 76 for introducing the binding agent 83 are unnecessary. Instead, the filling can be carried out through the tube 82, which has openings (not shown), which does not need to have any bushings, spring clips or the like at its ends for fastening the end plate 76, since it only has to be ensured that

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a flange 83' is present which holds the end plate firmly to the front side of the brick block 74.

An advantageous embodiment consists in inserting at least one stiffening plate, the outer contour of which essentially follows the outer contour of the roller shutter box, as reinforcement between two brick blocks of the box that abut against one another at the end, which may have openings for additional reinforcements that are required. Such a stiffening plate can be seen in Fig. and is provided with the reference number 85. Such a stiffening plate 85, which is expediently made of sheet metal, can be inserted at 10, for example, in the embodiment according to Fig. and serves to additionally stiffen and stabilize the roller shutter box, in particular in those that extend over a greater length and tend to warp under the influence of the stresses that occur, e.g. bulging of the side webs. These stiffening plates 85 can have at least one upwardly projecting eyelet 87 on their central web 86, which on the one hand serves for transport and on the other hand can be mortared into the masonry above and is thus suitable for a more intimate connection between the roller shutter box and the adjacent masonry.

Such a stiffening plate is particularly advantageous in the embodiments according to Fig. 24 and 25, namely where the U-shaped roller shutter box profile is made up of brick boards, which in turn consist of individual bricks and are either already pre-reinforced or can be placed as individual bricks in a form template during the formation of the roller shutter box profile and then reinforced, after which the binding agent is introduced. There, these stiffening plates or sheets 85 ensure perfect stability, particularly at the joints between the central webs and side webs, such that in the embodiment according to Pig, 25 the brick board forming the central web (Fig. 24) is replaced by a rigid foam molding

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can be replaced, which provides particularly good insulation and reduces weight. Apart from that, the two embodiments according to Figs. 24 and 25 can be made much narrower, provided there is sufficient freedom for the roller shutter to be accommodated, than would be the case with roller shutter boxes made up of angled bricks or U-shaped bricks, so that installation in thinner masonry, e.g. only 30 cm thick, is also possible, whereby the additional insertion of additional thermal insulation in the form of foam is also possible in the embodiment according to Fig. 24. In the embodiment according to Fig. 25, the foam form stack 88 has an extension on one side which lies flat along the inside of one of the two brick boards forming the side webs, in this case the brick board 72. It is understood that in this case the brick board 72 faces the interior of the building in which the finished roller shutter box is to be installed. In the embodiment shown, the foam molding also has molded-on webs 107, 108 which engage in reinforcement channels 109, 110 [ and increase stability even before the binding agent 111 is introduced in addition to the reinforcement rods 112, 113. In the embodiments according to Figs. 24 and 25, the same reference numerals are also used for the same parts.

The foam molding 88 may be made of polystyrene, polyurethane or the like.

Where reinforcement bars 77 or reinforcement tubes 61 (Fig. 12) require this, the stiffening plate 85 must of course have corresponding openings 89 which are essentially congruent with the through-going channels into which the reinforcement bars or tubes are inserted. The method for producing a prefabricated roller shutter box according to the invention is characterized in that the brick blocks forming a roller shutter box are joined together with or without an intermediate layer of binding agent and then the ^!

Armoring rods are inserted into the aligned channels of the bricks, whereupon binding agents

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is pressed into the channels. If necessary, one or more reinforcing plates 85 are inserted when the bricks are joined together and end plates 75 and 76 are also added. The binding agent is preferably introduced using a lance (not shown) which is inserted parallel to the reinforcing bar 77 into the same channel 90 (Fig. 20) through a hole 81 in the end cover 75 and is withdrawn accordingly during the filling process.

In this case, the lance is expediently withdrawn in stages such that the space between the reinforcing bar 77 and the perforated channel wall is only impacted in the area of the shaped blocks, but not in the area of their joints, in order to prevent the binding agent, which is pressed in under considerable pressure using a mortar press (not shown), from spraying out.

If the reinforcing rods are tubes 61 (Fig. 12) or 82 (Fig. 22), their outer diameter d is smaller than the inner diameter D of the hole channels 59 or 84, with the wall of the tubes having perforations distributed along the circumference of the tube, as shown in Fig. 14. It has already been pointed out that when using tubes, the lance is inserted into the mixer to release the binding agent and is withdrawn accordingly during the filling process. However, the tubes can also be left in the channels as lost lances, as shown in the embodiments according to Figs. 12 and 22.

The reinforcement rails described in Fig. 1 to 12 are preferably made of a rust-proof material, such as stainless steel, galvanized steel, aluminum or plastic.

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However, it has now been found that a plastering strip which may be arranged in one piece on such a reinforcement is very easily exposed to damage during transport , installation or the like. In order to avoid such damage, a second rail 93 having a plastering strip can be attached to a first rail 92 intended as reinforcement. This second rail 93 is expediently made of elastic material and can be snapped onto the first rail 92. This second rail 93 is made of plastic in a U-shape as shown in Fig. 10 and has two elastically bendable webs 95 and 96 which overlap the first rail 92 and which have inward-pointing projections 97 and 98 at their ends which can be snapped into corresponding recesses 99 in the first rail 92 in such a way that the second rail at least partially covers the first rail and lies against it.

It is understood that both rails 92 or 93 can be made of metal or plastic, with or without a plaster strip, and that the ends 101 of the side webs 102 of the respective embodiments of the roller shutter boxes according to the invention are each formed in connection with these rails in such a way that the rails can be snapped onto the ends. This applies independently of the embodiment according to Fig. 18 in that, for example, in the embodiments according to Figs. 24 and 25, no first rails 92 need to be provided at all, but rather, for example, the ends 103 and 104 of the brick boards and 72 in the embodiment according to Fig. 24 can have the recesses and 100 in the embodiment according to Fig. 18 can have corresponding recesses in the brick material, into which in a manner also not shown, but in the embodiment

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comparable to Fig. 18/ rails made of metal or plastic can be snapped on/ whether with or without plaster strips»

In any case, it is advantageous that the plastering strips can be installed on site, i.e. after the roller shutter boxes have been installed, for example shortly before the actual plastering takes place, so that the risk of damage to the plastering strips is kept to a minimum.

For this purpose, the snap-on S

Rails two the ends 102, 1Ö3, 104 or the like of the |

elastically bendable webs 105, 106 overlapping the respective side webs, for example 71 or 72 (Fig. 24), as shown for example in Fig. 18, which can each lock into corresponding recesses at the ends, regardless of whether these recesses are formed in the brick material itself or in the manner shown in Fig. 18 on a reinforcing rail.

In this context, it is expressly pointed out that the rails 114, 115 in the embodiments according to Figs. 24 and 25 can be both reinforcement rails, regardless of whether the reinforcement rods 69 are present or not, and also simply snap-on rails, optionally having plaster strips 116 as here. A support strip for foam moldings is also provided at 117.

It is also pointed out that in the embodiment according to Fig. 25, instead of the webs 107/108, grooves can also be provided in the molded piece, comparable to the grooves 118 and 119 in the edges of the brick board 70 forming the central web, such that the binding agent 111 flows into the channel 109, 118 or 110, 119 that is formed (see Fig. 24) and thus into both the side webs and the central web.

Claims (1)

Expectations Prefabricated roller shutter box (1) made of abutting brick blocks, which in cross-section form a roller shutter box profile in the shape of an upside-down ü made up of two side webs and a central web connecting them and are connected to one another by reinforcements, characterized in that the reinforcements have rails (14, 15) that rest against the ends (12, 13; 48, 49; 102; 103, 104) of the two side webs (6, 7), extend essentially over the entire length of the roller shutter box (1) and are connected to the ends (12, 13; 48, 49; 102; 103, 104) by means of binding agents. 2. Prefabricated roller shutter box according to claim 1, characterized in that the rails (14, 15) are designed as profile rails and the ends (12, 13) of the side webs (6, 7) overlap at least on one of their sides (18, 19, 20). 3. Prefabricated roller shutter box according to claim 1 or 2, characterized in that on the outside of at least one of the rails or profile rails (14, 15) a .../A2 A2 a plaster strip (23, 24) extending essentially vertically away from the side web (6, 7) is arranged in one piece. 4. Prefabricated roller shutter box according to claim 1, 2 or 3, characterized in that the rails or profile rails (14, 15) or angle rails are perforated. 5. Prefabricated roller shutter box according to claim 4, characterized in that the openings 0 ^or ;) are each opposite recesses (26) in the brick blocks (&lgr;, 4, 5). 6. Prefabricated roller shutter box according to claim 5, characterized in that the recesses (26) have the shape of grooves. 7. Prefabricated roller shutter box according to claim 2, characterized in that the profile rails (34) have webs (39) extending in their longitudinal direction, projecting in the direction of the side webs (6, 7, 7 ¹ ) and fitting into correspondingly formed slots (40) in the shaped bricks. 8. Prefabricated roller shutter box according to claim 1 or 2, characterized in that in the inner corners (55, 56) and/or on the outside of the central web (58, 58' - Fig. 12) of the brick blocks forming a roller shutter box, additional reinforcements in the form of continuous angle rails (57) extending essentially over the entire length of the roller shutter box and connected to the brick blocks by means of a binding agent and/or rails made of flat or T-material (57 ·) are provided, whereby the latter can engage in recesses (56'} on the brick blocks. .../A3 *4 4Wl 4« 4 ** «« 44 · I · 444« «4|« Il Il «41 Il · I I I 4 4 t «4441 I < « 4 * ·4 A3 9« Prefabricated roller boxes according to claim 8 j characterized in that both the corners (55, 56) and the angle rails (57) adapted thereto are rounded. 1Oi Prefabricated roller shutter box made of abutting shaped bricks which , in cross section, form a roller shutter box profile in the shape of an upside-down ü made up of two side webs and a central web connecting them and reinforcements, in particular according to one or more of the preceding claims, characterized in that the shaped bricks of a roller shutter box (1) have, at least in their corners, at which the side webs (6, 7; 50, 51) and the central web (8; 58, 58') meet, continuous, aligned channels (59) in which reinforcing bars (61) embedded in binding agents (60) are inserted. 11. Prefabricated roller shutter box according to claim 10, characterized in that the brick blocks also have aligned hole channels (68) in the area of the ends of the two side webs, in which reinforcements (69) are arranged. 12. Prefabricated roller shutter box according to claim 10 or 11, characterized in that the brick blocks are brick boards (70, 71, 72), possibly already reinforced, with one brick board (70) forming the central web and two brick boards (71, 72) forming the side webs of the upside-down ü. 13. Prefabricated roller shutter box according to claim 12, characterized in that the brick board forming the central web is replaced by a rigid foam molding (88). .../A4 ₄₄ * .i *· &iacgr;&iacgr;&diams;·' A4 14* Prefabricated roller shutter box according to claim 13, characterized in that the foam molding (88) has on one side an extension lying flat along the inside (90) of one of the two brick boards (72) forming the side webs. 15* Prefabricated roller shutter box according to claim 14, characterized in that the foam molding (88) consists of polystyrene or polyurethane* 16. Prefabricated roller shutter box according to one of the preceding claims, characterized in that the respective end brick blocks (2', 3', 4', 5') of a roller shutter box ( ¹¹ ) have a circumferentially formed inner fold (65, 65') into which a respective end cover (66, 66') can be inserted and fastened by means of a binding agent. 17. Prefabricated roller shutter box according to one or more of the preceding claims, characterized in that the rails used for reinforcement are made of a rust-proof material, such as stainless steel, galvanized steel, aluminum or plastic. 18i Prefabricated roller shutter box according to claim 2, characterized in that a second rail (93) having a cleaning strip (94) can be fastened to a first rail (92) provided as reinforcement. 19. Prefabricated roller shutter box according to claim 18, characterized in that the second rail (93) consists of elastic material and can be snapped onto the first rail (92). A5 &bull; * 20. Prefabricated roller shutter box according to claim 9, characterized in that the second rail (93) is made of plastic in an IH shape and has two webs (95, 96) which overlap the first rail (92) and can be bent elastically, which have inward-pointing projections (97, 98) at their ends, which can be snapped into corresponding recesses (99, 100) on the first rail (92) in such a way that the second rail at least partially covers the first, resting against it. 21 k Prefabricated roller shutter box according to one of claims 10 to 15, characterized in that rails (92, 93) made of metal or plastic are provided, with or without plaster strips, and that the ends (101) of the side webs (102) and these rails are each shaped in such a way that the rails can be snapped onto the ends. 22. Prefabricated roller shutter box according to claim 21, characterized in that the rails have two elastically bendable webs which overlap the ends (102, 103, 104) of the side webs (71, 72) and which have inward-pointing projections (105, 106) at their ends, which can be snapped into corresponding recesses at the ends. 23. Prefabricated roller shutter box according to one of claims 1, 10, 11 or 12, characterized in that on its end faces end plates (75, 76) are fastened to the brick blocks (73) by means of dowels or bushings (78) or spring clips or the like sitting on reinforcing rods (77), and that the end plates have bearings for the respective roller shutter shaft. .. ./A6 OM SUM Ä6 * 24. Prefabricated roller shutter boxes made of abutting bricks, which in cross section form a roller shutter profile in the shape of a head-standing frame made of two side webs and a central web and reinforcements, in particular according to one or more of the preceding claims, characterized in that at least one U-shaped stiffening plate (B5) is inserted as reinforcement between two bricks of the box which abut against one another on the side, which optionally has openings for any additional reinforcements that may be required. 25. Prefabricated roller shutter box according to claim 24, characterized in that the stiffening plate (85) has at least one upwardly projecting eyelet (87) on its central web (86). 26. Prefabricated roller shutter box according to claim 25, characterized in that the stiffening plate (85) is made of sheet metal. 27. Prefabricated roller shutter box according to one of the preceding claims, characterized in that the bricks or shaped bricks are perforated bricks.