SK6452001A3 - A screening arrangement - Google Patents

Abstract

The screening arrangement comprises a flexible length of screening material, a tubular rod (13), along which one end of the length is fastened, and around which the length can be wound, and a driving device for moving the length towards or away from the tubular rod. The driving device comprises an input shaft driving a driver member in driving engagement with the length. The tubular rod (13) is connected with one end of a torsion spring (35), the other end of which is connected with a drive shaft (31) driven by the input shaft in such a manner that in connection with rewinding and unwinding, the drive shaft has the same direction of rotation as the tubular rod (13).

Description

Technical field

The invention relates to a drainage trough for draining water through an opening in a roofing substrate comprising at least one longitudinal trough member comprising a first substantially U-shaped cross-section.

BACKGROUND OF THE INVENTION

Such gutters can be used, for example, when the window is to be mounted in a roof structure with a roof underlay.

In order to make room for the window to be mounted in the roof structure, the horizontal battens between the two rafters are cut and a hole is made in the roof underlay following the rafters.

In order to prevent water from melting ice, penetrating windblown snow or other kinds of moisture from dripping on the top surface of the roofing and getting to the window through this opening, it is necessary to create a trough that can drain this water from the opening to the intact roofing outside the opening.

This is typically done by terminating the end of the roof substrate above the window in such a way that it overlaps with the end located below in which the window opening has been cut.

The uppermost end of the roof substructure is then provided with two slits extending substantially perpendicular to its lower edge along the two rafters between which the window is positioned so as to form a tongue between the ends where the ends are fastened to the respective rafters.

The gutter may be formed in situ from the cut tongue by bending the free end of the tongue into a U-shape upstream of the mounted roof support, after which the free end is fastened to a rail mounted between the rafters above the tongue.

For this trough to work satisfactorily, it should be done with great care, since on the one hand the trough must have a suitable slope and on the other it must be so tightly attached to the rail so that the trough does not bend in ·· ·

·············································· 2Centre, not even deformed. This is a special problem with very flexible roof substrates.

Alternatively, a substantially U-shaped prefabricated gutter may be used, the gutter being mounted with a suitable inclination transversely between respective rafters, one U-shaped arm penetrating through the cuts in the upper membrane so that the tongue ends down in a U-shape.

In this connection, there is a problem that the flexible roof underlay can bend, creating a pocket behind the trough in which water can accumulate. If enough water accumulates in your pocket, it can make it difficult to pull your tongue out of the trough and beyond. This is particularly problematic in connection with very flexible roof substrates.

To avoid this problem, it is necessary to provide a trough with a lath support which allows the roofing to be fixed with nails or the like that penetrate the roofing, the trough and the lath.

Attaching the tongue in the trough with adhesive tape or the like is not practicable in practice due to prevailing ambient conditions, as the trough is on the one hand exposed to temperature variations from, for example, -20 ° C to +70 ° C and on the other air humidity too low.

The necessary support is a problem because the craftsman to install the chute must have a piece of wood of appropriate length at hand. This piece of wood typically has to be lifted or walked to the ground, which costs valuable time. Often, pieces of wood on the support will be available in the form of fabrics that have been carved to provide space for the window. However, these pieces of wood are necessarily shorter than the distance between the two rafters and thus cannot be used directly, but must be joined to form a single support, which in turn takes time.

Since the gutter is additionally designed to be penetrated by nails or the like, partly in order to attach it to the roofing substrate, partly in order to be able to mount itself on the support, the gutter is typically made of plastic or thin aluminum due to Which is not strong enough to be self-supporting.

In addition, as a result of fixing the roof underlay to the gutter, the roof underlay will not be movable. Should it occur during nailing

- unwanted sagging of the roofing, the nails must first be removed using tools, the sagging must be smoothed and the roofing must be nailed again.

It is an object of the present invention to provide a drainage trough of the kind mentioned in the introduction, which does not have the above drawbacks.

SUMMARY OF THE INVENTION

This object is achieved by a drainage channel for draining water through an opening in the roofing, which comprises at least one longitudinal gutter member comprising a first profile having a substantially U-shaped cross-section which comprises at least one retaining means which can retain without damaging the roofing roof underlay in the drain channel.

In a preferred embodiment, the retaining means comprises a second substantially U-shaped cross-section, said retaining means being adapted to engage securely with the gutter member and retain the roof substrate in a secure engagement, the roof substrate being clamped between respective U-arms of the gutter member; holding means.

This makes fixing the roof substructure simple and easy.

It is particularly advantageous if the first U-arm of the retaining means is made of a resilient and flexible material, so that the roof substrates of different thicknesses can be clamped.

It is further preferred that the second U-arm of the trough member terminates in a bend or fold facing inwardly of the U-shape, and that the second U-arm of the retaining means is designed to be resiliently engaged beyond the bend or fold.

In this way, a good locking is achieved between the trough member and the retaining means.

Advantageously, the second U-arm of the retaining means may also end in a bend or fold.

This offers the advantage that the retaining means are easy to insert and remove, for example if the roof substrate is not placed as planned in the drain. ·································································

-4žľabe. This is particularly feasible without the risk of injury to the fingers. It is also immediately feasible even when gloves are worn.

In a preferred embodiment of the drain channel, the respective first U-arms are longer than the respective second U-arms of the drain channel and the retaining means.

In this way, it is easy to mount the retaining means and at the same time there is considerable freedom of choice regarding the location of the roof substrate with respect to the drain member.

In another preferred embodiment of the drain channel, the two U-arms of the retaining means have substantially the same length.

In this way, the retaining means with a symmetrical U-shaped cross-section are obtained such that the retaining means can be rotated 180 ° in the longitudinal direction without any problem, without any effect on their function.

In one preferred embodiment of the invention, the trough member forms a telescopic element and therefore also comprises at least one third profile with a substantially U-shaped cross-section, said profile being adapted for longitudinally sliding engagement with the first profile.

In yet another preferred embodiment, the trough member and / or the retaining means comprise slip protection. According to a preferred embodiment, the non-slip protection comprises a coating of a non-slip material or, in another embodiment, embossed formations in the trough member.

This provides the advantage that thin and / or smooth types of roofing are better maintained.

A further object of the present invention is to indicate the use of a drain trough characterized in that it has such rigidity that, at least in the case of mounted retaining means, it can be mounted in a roof structure comprising at least two rafters and a roof substrate laid thereon without any further supports except adjacent rafters at respective ends of the drain channel.

In this connection, the time required for assembly is reduced in view of the above-mentioned prior art.

The invention will now be described in detail by way of example and with reference to the schematic drawings.

· · · ··· ··· · ·· ·· ·· ···

-5Drawing of Figures in the Drawings

Fig. 1 is a perspective view of a telescopic embodiment of a drain channel according to the present invention, but without a securing member mounted thereon;

Fig. 2 is a perspective view of the retaining means of the present invention;

Fig. 3 is a cross-sectional view of the telescopic drain channel of FIG. 1 with the retaining means of FIG. 2

Fig. 4 is a cross-sectional view of another embodiment of a drain channel according to the present invention with retaining means mounted and a roof substrate retained;

Fig. 5 is a sectional view of the drain channel of FIG. 4 with retaining means fitted but with a thicker roof underlay, and

Fig. 6 is an alternative embodiment of the retaining means.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1 is a perspective view of a telescopic embodiment of a drain channel according to the present invention; The telescopic drain channel comprises two substantially U-shaped longitudinal profiles 3 and 4, hereinafter referred to as the third and first profiles, which are designed to be displaceable relative to one another in the longitudinal direction. By shifting the two profiles 3 and 4 relative to each other, the overall length of the drain channel can be adapted to the installation conditions without the use of tools for this purpose. In practice, this means that the length can be adapted to the distance between the two rafters to which the drain channel is to be mounted.

The U-shaped arms 31, 41, which will be referred to hereinafter as the rear Uramens to be adjacent to the rafters, are designed in such a way that they are longer than the U-arms 32, 42 facing away from the rafters, said U-arms 32, 42 being hereafter called the front U-arms. This facilitates the installation of the trough using, for example, nails over the rear U-arms 31, 41. Furthermore, the placement of the tongue cut in the roof underlay in the trough is facilitated because the tongue rests on top of relatively long rear U-arms and easy to hold with fingers, while you · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

2. The relatively long U-arms further facilitate the placement of the tongue by its usually horizontally cut bottom end into a drain trough, which must necessarily be mounted obliquely, without the risk that the tongue on one side does not reach far enough while on the other too long.

The retaining means 2 is shown in perspective in FIG. 2. The retaining means 2 comprise a substantially U-shaped longitudinal profile, hereinafter referred to as a second profile which is made of a suitable resilient material so as to spring both U-shaped arms. The retaining means is mounted by pressing it downwards into the U-shaped profiles 3, 4, whereby the U-arms of the retaining means come into elastic contact with the rear and front urameters of the channel members. It should be noted, however, that the elastic contact at the rear Uramena will normally not be straight but through the intermediate roof substrate to be attached. In the following, the U-arms of the retaining means will be called front and rear in accordance with the U-arms of the profiles 3,4 to which they are adjacent.

As seen in FIG. 3, both the holding means 2 and the first profile 4 are provided with respective fastening means 22b, 42a for securing the holding means 2 in the profiles 3,4.

In the illustrated embodiment, the fastening means of the first profile 4 comprise a U-shaped inward U-arm bend or fold 42a. Correspondingly, the front U-arm of the retaining means is bent inwardly to the U-shape so as to form a region 22b with suitable rounding or fold 42a. Behind the rounding, the front U-arm 22 of the holding means 2 is bent in the opposite direction so that it extends substantially in the general direction of the U-arm.

The front U-arm 22 of the retaining means is preferably longer than the front U-arm 32.42 of the profiles, so that it projects above these profiles. This makes it possible to remove the retaining means 2 again without the use of tools. This is done by pressing the front U-arm 22 of the retaining means inwardly into the U-shape so as to release the engagement. To ensure a good grip with the fingers that will allow this indentation even when gloves are used, the front U-arm 22 of the retaining means may result in a smooth bend or fold 22a. This bend ··

-7 • · ···· leaves no sharp edges, so the use of the gloves mentioned above is not necessary due to the handling of the gutter, but rather due to other factors such as weather.

In the telescopic embodiment, it is preferable that the bend or fold 42a of the front U-arm 42 of the first profile 4, in addition to forming the retaining means, also engage the front U-arm 32 of the third profile 3 such that relative displacement can only occur in the longitudinal direction of the profiles. In the same way, the rear U-arm 31 of the third profile 3 may have a bend or fold 31a for engagement with the rear U-arm 41 of the first profile 4. However, it should be appreciated that this bend or fold 31a is directed away from the U-shaped interior.

In order to create friction so that the two profiles 3, 4 do not inadvertently move towards each other, the rear U-arm 41 of the first profile is provided at the upper end with a slight bend 41a so that the upper edge of the U-arm is pressed towards the rear side of the rear U-arm 31 a third bend profile 31a.

In FIG. 4 and 5, a non-telescopic drainage trough 1 is shown, which can in principle be designed in exactly the same way as the first profile 4 in the telescopic embodiment of FIG. 1 and 3. Similarly, the holding means 2 shown are identical to those shown in FIG. 2 and 3.

Further, FIG. 4 and 5 illustrate that the retaining means 2 are designed in such a way that they can attach roof substrates 54, 55 of different thicknesses.

In FIG. 4, the attached roofing substrate 54 is, for example, a membrane 54 of a flexible roofing substrate having a thickness of approximately 1 to 2 mm, while in FIG. 5, it is a layer 55 of a rigid roofing substrate with a thickness of, for example, 5 mm.

To allow this attachment of different types of roofing with different thicknesses and properties, the rear U-arm 21 of the retaining means 2 is provided with a sharp bend approximately half the height of the U-arm 21 so that the upper end when the retaining means is already mounted is pushed to the roof substrate 54, 55, which in turn is pushed to the rear U-arm 11 of the drain channel. This attachment at the upper end of the relatively long rear U-arm 21 contributes to eliminating the above problems of placing the horizontally cut tongue in an inclined trough.

· · ·· ·· ··· -8-

In an alternative embodiment, the retaining means 2 may be designed with a substantially symmetrical U-shaped cross-section such that the front U-arm 22 is a mirror image of the rear U-arm 21. Thus, the retaining means 2 can be freely rotated in the longitudinal direction without any effect on them snapping function.

In cases where very thin membranes of roofing substrates are used, for example TYVEK® foils having a thickness of 0.1 to 0.5 mm, the roofing substrate can be placed in the trough member following its U-shape.

In this way, the U-shaped retaining means can be pushed down into the U-shaped trough member, thereby attaching the roofing substrate between the front and rear urameno. In this way, an optimal fastening of the roofing is ensured.

As a complementary or alternative way of ensuring optimal attachment of the film, especially in the case of thin films, the longitudinal channel member of the drain channel or retaining means 2 may be provided with anti-slip means. For example, the anti-skid means may be a friction coating on at least a portion of the inner surface of the trough member, or at least a portion of the outer surface of the retaining means 2. Another example of designing the anti-slip means is roughening on the trough member, preferably in the form of small protrusions or wells.

In the illustrated embodiments, the profiles 1, 3, 4 are made from 1 mm bent aluminum or from 0.5 mm to 0.7 mm spring steel or galvanized steel. These material thicknesses are sufficient to make the drain channel self-supporting and even to be able to walk down. This means that while working on the roof structure to which the drain trough is to be mounted, the drain trough can be climbed without risking that the person doing so will fall.

The retaining means according to the illustrated embodiment have a length which by its size corresponds to the shortest length of the profiles, i.e. the length of the profiles of the trough member in the telescopic embodiment, when they are fully inserted into each other. The retaining means are preferably made of bent aluminum, spring steel or galvanized steel with thicknesses corresponding to the thickness of the trough member and, after mounting, contribute to the strength of the drain trough. Of course, you can also • • • • • • · t · t t · t t t t t t t t t t t t t t t t · ··· · ·· ·· ·· ···

Use retaining means with a size that is adapted to the distance of the actual rafters and thus the length of the drain channel.

In cases where the strength of the drain channel is less important, several shorter retaining means may be used instead of one long, longitudinal retaining means. In particular, it could be holding means with a length that is shorter than the height of the rear U-arm. In practice, they will therefore be similar to terminals. Alternatively, the retaining means may in this case be designed as a spring clip, as shown in FIG. 6th

Claims (12)

A drainage trough for draining water through an opening in a roof underlay (54, 55) comprising at least one longitudinal trough member comprising a first substantially U-shaped cross-section (1, 4), characterized in that it comprises at least one retaining means (2), adapted to attach the roofing substrate (54, 55) within the U-shaped cross-section. A drain channel according to claim 1, characterized in that the retaining means (2) comprise a second substantially U-shaped cross-section, wherein the retaining means (2) are adapted to engage securely with the gutter member and secure the roof a substrate (54, 55), the roof substrate (54, 55) being clamped between respective uramples (11, 31, 41; 21) of the trough member and the retaining means (2). Drainage trough according to claim 2, characterized in that the first The U-arm (21) of the retaining means (2) is made of a resilient and flexible material to allow the roof substrates (54, 55) to be clamped with different thicknesses. A drain channel according to any one of the preceding claims, characterized in that the second U-arm (12, 42) of the gutter member terminates in a U-shaped bend or fold (12a, 42a) and that the second U-arm (22). 1) of the retaining means (2) is designed to be elastically engaged behind this bend or fold (12a, 42a). Drain channel according to any one of the preceding claims, characterized in that the second U-arm (22) of the retaining means (2) terminates in a bend or fold (22a). Drainage trough according to any one of the preceding claims, characterized in that both in the trough member and in the retaining means are: · · E e e e ♦ e e e e · e e e e e e e e e The first U-arms (11; 21, 31, 41) are longer than the respective second U-arms (12; 22, 32, 42). A drain channel according to any one of claims 1 to 5, characterized in that the first U-arm (22) and the second U-arm of the retaining means (2) have substantially the same length. A drain channel according to any one of the preceding claims, characterized in that the channel member and / or the retaining means (2) comprise anti-slip means. A drainage trough according to claim 8, wherein the anti-slip means comprises a coating of a non-slip material. A drainage trough according to claim 8, wherein the anti-slip means comprise roughening in the trough member. Drainage trough according to any one of the preceding claims, characterized in that the trough member forms a telescopic element and therefore also comprises at least one third substantially U-shaped cross-section (3), said profile being adapted for sliding engagement in the longitudinal direction. the first profile (4). A method of installing a drain trough according to any one of the preceding claims in a roof structure, comprising at least two rafters and a roof support laid on top thereof, characterized in that the drain trough is mounted without any support other than the two rafters. • • ·· • · · · • • • · ·· · * · ···. • • ··· ···· • • · · • · ··! s :: · ·