NO822663L - DOER. - Google Patents

Description

The invention relates to sound-absorbing doors and especially doors of the type called "double construction" without mechanical connections.

in accordance with Swedish design document no. 330,250, consisting of slats of e.g. wood fibres, a construction is achieved which is absorbent for lateral resonances. A further step towards improved sound attenuation is achieved if the j known door is arranged with a split frame, in accordance with, for example, Swedish interpretation document no. 349.093. However, the known technique does not indicate an optimal solution to the sound attenuation problem by a specific available material combination or weight. The purpose of the present invention is therefore to provide such a solution! by simultaneously taking into account practical and economically feasible manufacturing possibilities. The invention therefore, in its broadest sense, includes a door with a frame and core construction and a lamella arrangement included in the core construction, as well as on different sides of the frame and core an arrangement of cover-s-<j ikt, whereby the door is distinguished by--the slats in the core are arranged mainly close to each other and are discontinuous in the longitudinal direction therein;

the smallest over the majority of the cross-section of this. The slats can in principle be arranged either in the door's height direction or in its width direction. One after the other;

lamellas preferably consist of alternating porous or hard material, for example wood fiber material. whereby lamellar- i

in the angement is doubled and each slat setting is fixed

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The miider layer is preferably included in the cover layer arrangement, which consists of a pair of discs, for example discs of hard wood material. The discontinuities in the slats are suitably made in the form of saw marks or similar that extend from , the side of the slats facing away from the supporting substrate and cuts through most of the respective lamella.

The lamella pieces have substantially the same saw length, which is less than twice the height of the lamella (the height is measured perpendicular to the plane of the door surface). J

The invention also includes a procedure for manufacturing the door, whereby in one variant the door core is manufactured j

in that at least one set of slats is laid essentially squarely against each other on a substrate and fixed on this, after which the slat pack is sawed through in the desired manner using a slat saw or similar to create the aforementioned discontinuities.

In another variant, the frame is sawed through, preferably in the plane of the existing sealing strip groove, to a so-called ii double construction without mechanical connections, after which the slatted installation in each door half is sawed through with a slat saw or equivalent.

The invention is exemplified in the following description with reference to the attached drawings where

Fig.1 shows a perspective drawing of a door core or a cross-section of such, Fig.2 shows a wide vertical section of a door with a core in

accordance with fig.l fig. 3 schematically shows a partially unused view of the manufacturing forging for a core section of a double construction, and fig. 4 shows in a partial view how the core in accordance with fig. 3

is inserted in a frame and also suggests how a "double construction" is also understood

Fig. 1 thus shows a partially unbroken perspective view of a door core

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which in the embodiment shown consists of two layers 11

and 12, where each constitutes an arrangement of wooden fiber lamellas or the corresponding statement of wooden fiber discs, where on every other following lamellas, e.g. 14 and 13, alternately consisting of porous or hard wood fiber material. The slat arrangements are centrally separated by a disc 15

of, for example, hard wood fiber material, but not fixed to the disc, which in and of itself is not absolutely necessary, but of i.a. from a fire safety point of view and to a certain extent also from a sound reduction point of view have certain qualities. On the other side of each lamellar arrangement of the cover layer, each of which consists of glued or otherwise joined together hard wooden fiber discs 16, 17 or.

In each of the lamellar arrangements 11, 12, there are designed interruptions, in the embodiment shown in the form of saw grooves j 21, which extend from the central plane of the core 10 all the way to the inner cover layer 16. The interruption or ! however, the discontinuities in the lamellae 13,14 can be

in another way, for example by only partially sawing the slats through, which may be preferable from a handling point of view, or alternatively, pre-cut slat pieces can be placed close to each other and suitably placed in the door frame between the cover discs.

The slats. 13, 14 are loosely placed in relation to each, second and center plate 15, but attached to the cover layer, over the entire surface or alternatively partially. The "free" relatively short slat pieces, which are obtained in this way, !

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with its degree of freedom makes an unexpectedly large contribution to the material's sound-absorbing properties, which i.a. means that with one and the same sound reduction figure, you have been able to lower the door's total weight to a not inconsiderable extent.

The slats 13 or 14 divided by the saw grooves 21 are preferably of mutually equal dimensions, where the rule of thumb applies that the sawn length is smaller than the . twice the height of the lamella (the height is measured perpendicular to the plane of the door surface, in lamella form the disc is perpendicular) on the decks. j

i The orientation of the slats 13,14 in the finished door is; preferably so that the slats are oriented in the direction of the door's height, but an orientation in the width is in principle not impossible.

The core structure 10 is equipped so that it can be inserted into a door frame 18, shown in vertical section in fig.2 and equipped at the top and bottom with reinforcements 19, 20. The door has, in a known manner, a groove 22 for receiving a sealing strip 23, which together with additional sealing strips 24, 25 provides a permanent seal against a door frame 26 and threshold 27.

Fig.3 shows how a section in a door core 10 can be produced by tightly inserting and fixing slats 13,14 against a supporting base 29 between a pair of wooden slats 28, after which the package is sawn through with a slat saw to create dividing grooves 21, for finally to be covered with a further disc 30 to create a finished door core package which with or without center disc 15 can be inserted into a door frame 26 (fig. 4). The discs 29, 30 thereby form the inner discs corresponding to discs 16, 17 in the cover layer arrangement in accordance with fig.l. J

Dashed lines 31 in Fig. 4 show how the existing sealing strip groove 22 can be extended to extend completely through the frame. With such an operation it is thus possible to separate an ordinary door of "double construction type" and with a lamella saw or similarly cut the slats 13*14 to the desired lengths and then join the door halves together, for example as shown in Swedish design document no. 340.093.

Claims (1)

PATENT REQUIREMENTS: ,iron„Qg 1. Door, comprehensive frame and M construction vi. ikij ernekonstruks j onen incoming slat arrangement, as well as on; different sides of the frame and core placed arrangement of tire layer, characterized the lamellae (13, .14) in the core (10) are placed mainly close to each other and are discontinuous in the longitudinal direction, at least over the majority of the cross-section thereof. \ i 2. Door in accordance with claim 1, character i—j s e r t in that consecutive slats (13,14) fold, even consist of hard or porous maf4iale, for example tref iberma^iale. 3. Door in accordance with claim 1 or 2, where the core of the door basically consists of a so-called double construction without mechanical connections and where the lamellar arrangement is doubled, characterized by the fact that each lamella set-up (ll, 12) is attached to a supporting base £16) or equivalent. j 4. Door in accordance with claim 3, characterized in that the supporting substrate (16) is included in the cover layer arrangement, which consists of a pair of plates (16,17), for example plates of hard wood fiber material. i 5. Door in accordance with claim 4, character i—: s e r t that the discontinuities are produced by saw marks (21) or similar extending from that side, of the slats (13,14) facing from the supporting substrate (16) and cuts through most of the respective lamellae.; 6. Door in accordance with claim 5, characterized in that the discontinuously divided lamellas (13,14)' exhibit substantially identical lamella pieces with a sawn length less than twice the height of the lamella. 7. Door in accordance with claim 6, characterized in that between the discontinuous slats (13,14) in the respective slat arrangement (11,12) a hard wood fiber plate (15) or equivalent is loosely placed. 8. Procedure for manufacturing a door in accordance with some or all of the requirements 1-7, including frame and j in the core construction and the lamella arrangement included in the core construction, as well as on various sides of the frame and core-placed arrangement of the tire layer, characterized by the fact that the core is manufactured by at least one set of lamellas being laid, mainly lamella brick against lamella, on a substrate and is attached to this, after which the slat pack is sawed through in the desired way using a slat saw or similar to create the discontinuities. I 9. Procedure for the production of a door in a delicate response with one or some of the requirements 1-7 comprising frame-j and core construction and in the core construction a lamella arrangement, as well as on various sides about the frame and core-placed arrangement of the cover layer, characterized by the fact that the frame of a door of so-called double construction without mechanical connections is sawed through, preferably in the plane of existing sealing strip grooves, and that the slat installation in each door half is then sawed through with a slat saw or equivalent.