Door Provided With a Curtain Which is Raisable by Winding and Has an Improved Lateral Tightness

Abstract

The inventive door comprises two lateral posts each of which is provided with a slide (9) bounded by two wings (8), a transversal element connecting the top ends of the lateral posts, a flexible curtain (5) whose lateral edges are inserted into the slides (9) and means for winding said curtain (5) in the open door position. According to said invention, each slide (9) is provided with a sealing profile (7) comprising a bottom wall (10) and two lateral walls (11) which substentially form an U-shape. Each lateral wall (11) rests against the wing (8) adjacent thereto.

Description

FIG. 1 represents a door in perspective,

FIG. 2 is a view in section taken along II-II of FIG. 1,

FIG. 3 is a view in section taken along III-III of FIG. 1,

FIG. 4 is a plan view of the post, and

FIG. 5 is an exploded perspective view of the upper part of a door post.

With reference first of all to FIG. 1, it can be seen that the door has two lateral posts 2 which border an opening made in a partition wall. A bracket 3 is placed a the upper end of each post. These two brackets 3 support a shaft which, in the example represented, is concealed by a transverse housing 4.

A curtain 5 is secured to the shaft. The curtain 5 consists of butt-welded horizontal strips of flexible material.

It will also be observed that the curtain 5 has stiffening bars 6.

As can be seen from FIG. 2, which shows a post 2 in cross section, this post is provided on its face directed toward the curtain 5 with two wings 8 bounding a slideway 9 between them. Depending on the particular case, the wings 8 bounding the slideway may form integral parts of the posts 2, for example in the case of extruded posts as can be seen from the drawing. In other embodiments, these wings may also be added as separate items to the posts 2.

Each lateral edge of the curtain 5 is inserted into the slideway 9 which is adjacent to it.

The essential feature of the door according to the invention is that a sealing profile 7 is placed in the back of each slideway 9.

The sealing profile 7 has a back wall 10 and two lateral walls 11 forming a U. Each lateral wall 11 bears against the wing 8 which is adjacent to it.

It will also be observed that the mutually facing faces of each of the lateral walls 11 are provided with a lip 12.

As can be seen from FIG. 2, each lip 12 as well as the ends of each of the lateral walls 11 are tapered so as to be very flexible.

The sealing profile 7 is secured to the interior of the slideway 9 by adhesively bonding its back wall 10 against the back wall of the slideway 9.

With regard to the curtain 5, a particular feature thereof is that it has a continuous flattened lateral edge 14 formed by high-frequency welding.

FIG. 4 shows the upper part of the door posts 2. It can be seen from this figure that a guide head 15 is placed in the slideway 9 in the continuation of the sealing profile 7.

The guide head 15 is a molded plastic element having a U-shaped cross section comprising a back wall 17 and two lateral walls 18.

FIG. 5 shows that, moreover, each lateral wall 11 of the head is equipped with a rib 19.

The door operates in a conventional manner, that is to say by winding the curtain 5 around the shaft to allow passage through the door and by unwinding the curtain 5 to obtain closure of the door.

Where the door provides access to a space which is at superatmospheric pressure, this door, when in the closed position, is subjected to a pressure over the whole of the surface of its curtain 5.

The lateral edges of the curtain 5 then press, under the effect of the pressure, against one of the lips 12 of the sealing profile 7 depending on which face of the curtain 5 is subjected to a superatmospheric pressure. In the upper part of the posts 2, the edges of the curtain 5 bear against the ribs of the guide head 15.

A very low leakage rate via the lateral edges of the curtain 5 is then observed. The sealing created by the profile is thus essentially static.

When winding up the curtain 5, the latter is no longer subjected to any kind of pressure by virtue of the massive leakage flow occurring in the region of the sill bar of the curtain 5. The lateral edges of the curtain 5 are therefore no longer bearing against the lips 12. Thus, minimum rubbing occurs between the curtain 5 and the sealing profile 7, the resulting advantage being that the profile has a very long service life and there is less debris formation due to friction.

Nevertheless, the profile is subject to wear. When it no longer performs its functions, the profile can be replaced extremely easily since all that is required is to raise the curtain 5, detach the worn profile and then refit a new profile into the slideways 9. This operation may take place in a very short time period and by maintenance personnel who do not have any specific qualification.

Of course, the invention is not limited to the embodiment described above by way of example, but rather encompasses all the embodiments thereof.

Claims

1. A door comprising: two lateral posts each having a slideway bounded by two wings,a transverse element connecting upper ends of the lateral posts,a flexible curtain having lateral edges engaging in each of the slideways, andmeans for winding the curtain into a door-opening position, wherein each of the slideways is equipped with a sealing profile having a back wall and two lateral walls substantially forming a U-shape, each of the lateral walls bearing against the wing which is adjacent to it.

2. The door as claimed in claim 1, wherein each of the lateral walls is provided with at least one lip which is able to come into contact with a lateral edge of the curtain.

3. The door as claimed in claim 1, wherein each lateral wall of the sealing profile is dimensioned to bear against the wing of the slideway which is adjacent to it.

4. The door as claimed in claim 1, wherein the curtain has a continuous lateral edge flattened by high-frequency welding.

5. The door as claimed in claim 2, wherein each of the lateral walls and each lip are tapered at their ends.

6. The door as claimed in claim 1, wherein in a region of the upper end of each post, a guide head has a U-shaped cross section comprising a back wall and two lateral walls, each lateral wall being provided with a guide rib, the guide head being positioned in a continuation of each sealing profile.