DE8906575U1 - sliding door - Google Patents

Description

Law firm MUNICH · STEINMANN · SCHILLER

MSS Law Firm Telephone 00 49 / (0)89 / 5 80 80 49 ■ Telex 5 28 464 wmuen d Willibaldstraße 36/38 · D-8000 Munich 21 Fax 00 49 / (0)89 / S 80 72 75 (automatic group 3) Patent Attorney: Dr. rer. nat Wilhelm-L. Munich, Dipl.-Phys. A ^{11 the} lawyers: German Patent Office Dr.j.ir,OttoC:.Steinn>.um Dr. jur, Walter O. Sihäer

Munich 2

9.8.1989, Mü/ Our sign: JM 1/8Sg

Use pattern application G 89 06 575.1 Applicant:

Jan Jacob Gerard MARKUS NL-2925 TJ Krimpen aan den Ussel

sliding door

Description

The invention relates to a sliding door for closing a wall opening, which is provided with suspension and guide means formed by a roller arrangement connected to the upper edge of the door, by means of which the door is movable along a suspension rail at a distance from the wall and parallel to it, the rail being arranged above the wall opening and provided with local recesses which are designed in such a way that the door, when it reaches its closed position, moves slightly downwards and towards the wall.

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Such a sliding door is known from US patent 4,404,770. Such sliding doors are used, for example, as hermetically sealed doors in cold and frozen goods warehouses or in hospitals or as fire protection or noise protection doors.

The well-known sliding door is suspended from a series of rollers that run in a V-shaped notch in a guide rail. In practice, it has happened that dirt and dust, e.g. house dust, accumulate in this notch, making the door difficult to slide. This accumulation of dust can also be undesirable for hygiene reasons when using these doors in refrigerated goods warehouses or hospitals.

It is now the object of the invention to provide a sliding door with such a suspension and guide construction that does not allow dust to settle on the supporting surfaces of the guide rail.

According to the invention, this aim is now achieved because the rail essentially consists of two supporting surfaces, which are predominantly inclined downwards from the center of the rail and which each interact with separate rollers which are mounted independently of one another for rotation on a horizontal shaft.

In this way, dirt and dust that may be present on the supporting surfaces of the rail automatically fall down along the downwardly inclined surfaces, so that the sliding door retains its smooth running properties even after a long time and even in dirty environments. When the door has reached its

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closed position is reached, in which the outer roller moves down into a local recess or notch in the rail and the inner roller slides down along the inclined supporting surface towards the wall, the speed difference between the two rollers increases. Because according to the invention these rollers are also rotatably mounted independently of each other during closing and opening of the sliding door, minimal resistance and wear of the structure are ensured.

According to the invention, it is preferred that both supporting surfaces are inclined downwards from the center of the rail at an angle of approximately 45° to the horizontal plane.

According to another embodiment of the invention, it is also possible for the suspension rail to consist of a shaft or a tube with a circular cross-section. In this way, rail profiles with bending strength are obtained which are easy to manufacture and insensitive to dust and dirt.

According to a further feature of the invention, a very simple and compact design is obtained if the roller arrangement consists of several pairs of rollers, both rollers or each pair of rollers being rotatably mounted on a common horizontal shaft.

The invention will now be explained further with reference to the drawing, in which an embodiment of the sliding door according to the invention is shown.

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Fig. 1 shows a schematic side view of the sliding door in the open position.

Fig. 2 shows a schematic side view of the sliding door in the closed position.

Fig. 1 shows a sliding door 1 with a door panel 2 for closing an opening in the wall 3 (not shown in more detail). Near the top edge, the sliding door 1 is suspended at some distance from the wall 3 by a roller arrangement consisting of several pairs of rollers 4, each of which consists of an inner roller 5 and an outer roller 6, which are independently rotatable on a common horizontal shaft 7. The suspension rail 8 is provided with two supporting surfaces 9 and 10, which are inclined downwards from the center of the rail at an angle of 45o to the horizontal plane and interact with the rollers 5 and 6 of the roller pairs.

When the door reaches its "closed position" shown in Fig. 2, the rollers 6 roll down into local recesses or notches 11 in the outer supporting surface 10 of the rail and the inner rollers 5 slide slightly downwards along the inclined supporting surface 9 so that the door panel moves slightly downwards and towards the wall. In this closed position, the door panel 2 can, for example, engage flexible sealing parts (not shown) in the wall and floor to achieve a hermetic seal.

The invention is obviously not limited to the embodiment described, but different

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denartiye changes may be made without departing from the scope of the invention.

For example, the suspension rail 8 can consist of a shaft or a tube with a circular cross-section.

Instead of being mounted on a common horizontal shaft, the rollers 5 and 6 of the roller pairs can be arranged offset in relation to one another, each on a gstjfsnntsn horizontal &ngr;&idiagr;&thgr;&idiagr;&thgr; cirshbsr cjoicicj^rt isi~ - &Agr;&Igr;&Igr;&thgr; However, these possibilities are obvious to the person skilled in the art and do not require any further explanation.

Claims (4)

- 6 - " JM l/89g ·1, Protection claims 1. Sliding door for closing a wall opening, which is provided with suspension and guide means which are formed by a roller arrangement connected to the upper edge of the door, by means of which the door is movable along a suspension rail at a distance from the wall and parallel to it, the rail being arranged above the wall opening and provided with local recesses which are designed in such a way that the door, when it reaches its closed position, moves slightly downwards and towards the wall, characterized in that the rail (8) consists essentially of two supporting surfaces (9, 10) which are inclined predominantly obliquely downwards from the centre of the rail and which each cooperate with separate rollers (5, 6) which are rotatably mounted independently of one another on a horizontal shaft. 2. Sliding door according to claim 1, characterized in that the two supporting surfaces (9, 10) are each inclined downwards from the centre of the rail at an angle of approximately 45o to the horizontal plane. 3. Sliding door according to claim 1, characterized in that the suspension rail (8) consists of a shaft or a tube with a circular cross-section. - 7 - JM l/89g 4. Sliding door according to one of the preceding claims, in which the roller arrangement consists of several pairs of rollers, characterized in that both rollers (5, 6) each
pair of rollers are rotatably mounted on a common horizontal shaft (7).