DE8328992U1 - Buffer device for dampening the impact of doors, especially sliding doors - Google Patents

Description

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DiPL-PHYS. BUSE · DiPL-PHYS. MENTZEL · dipl-ing. LUDEWIG

Unterdörnen 114 ■ PO Box 200210 · 5600 Wuppertal 2 ■ Telephone (0202) 557022/23/24 · Telex 8591606 wpat

37 5600 Wuppertal 2, the

Password; "expansion buffer"

Dorma-Baubeschlag GmbH 6 Co. KG* Breekerfeider Str. 42-48» 5828 Ennepetal

Buffer device for dampening the impact of doors» especially sliding doors

The invention relates to a buffer device for dampening the impact of doors, in particular sliding doors, with a stop plate and an elastic buffer piece which brakes the impact of the door leaf.

In the known buffer devices, the stop element usually hits an outer surface of the elastic buffer piece / whereby a certain area of the door leaf often serves as the stop / while the stationary buffer piece can either consist of an elastic material such as rubber, plastic or similar, or is also formed from a spring arrangement. In this case, it is often also common to attach the elastic buffer piece to the door leaf and let it hit the door frame, a stop piece or even the wall. Regardless of the arrangement and assignment of the buffer piece or the stop element, when the stop element and buffer piece come together, the buffer piece initially undergoes elastic deformation, whereby when the buffer piece springs back, the door leaf is pushed back from the stop more or less depending on the impact energy.

To avoid such springbacks, it is also known to use mechanical friction brakes as buffer devices, in which brake wedges are used as stop elements, which form a frictional connection with corresponding counter wedges that are fixed to abutments. However, with such friction brakes, the stop element is often set relatively firmly, so that large release forces are required.

The object of the present invention is to create a buffer device of the type mentioned above / in which, on the one hand, the stop movement is dampened without springback and, on the other hand, in which the door can be released from its

1* ^r stop position can be moved.

This object is achieved according to the invention in that the stop member is designed as a rearward-expanding mandrel that can be inserted into an elastically expandable recess in the buffer piece. As a result, the axial force released upon impact is converted into a radial force, which elastically expands the buffer piece. The door leaf therefore remains in its stop position and does not spring back, although the mandrel can be pulled out of the buffer piece without any particular effort. Both the mandrel and the buffer piece advantageously have a circular cross-section.

For reasons of ease of manufacture and assembly as well as for the purpose of compensating for assembly inaccuracies, according to a design feature of the invention, the mandrel advantageously has the shape of a truncated cone, while

the buffer piece is designed as an annular sleeve, the inner diameter of which is equal to or slightly larger than the smallest diameter of the frustoconical dome.

S In order to be able to securely fix the elastic buffer piece, it is preferably firmly connected to a solid insert that enables it to be attached. It is conceivable, for example, to form the elastic buffer piece from rubber or a plastic, such as a cross-linkable polyurethane known under the trade name Vulkollan.

Although it is possible to attach the buffer piece to the door leaf and to use the pin forming the stop member as a wall-mounted abutment, it is nevertheless advantageous for manufacturing reasons if, according to a further design feature of the invention, the pin forming the stop member is permanently assigned to the carriage and the buffer piece is permanently assigned to an adjustable stop.

The invention is shown in the drawing, for example on a sliding door unit, and is explained in more detail below. Shown are:

Fig. 1 a sliding door suspension with the

buffer device according to the invention in a view,

Fig. 2 the buffer device in active position in a longitudinal section.

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Above a sliding door, a guide rail 11 is arranged on which carriages 12 and 13 are guided so as to be displaceable and to which the sliding door leaf 14 is fastened in a height-adjustable manner via support screws 15. An adjustable stop 16 which limits the opening end position of the door leaf 14 is fastened to the guide rail 11 and against which the carriage 13 strikes after the door leaf 14 has been moved into its open position. In order to prevent the door leaf 14 from springing back when it is thrown open with momentum , a buffer device is arranged between the adjustable stop 16 and the approaching carriage 13. This buffer device consists of a stop member 17 and an elastic buffer piece 18. The stop member 17 is fastened to the carriage 13, while the buffer piece 18 is fixed to the adjustable stop 16. As can be seen from the figures, the stop member 17 consists of a rear-widening mandrel 19, which has the shape of a truncated cone with a circular cross-section and is penetrated in the axial direction by a receiving bore 20 for a fastening screw 21. The buffer piece is designed as a ring sleeve with a circular cross-section and has a central recess 22 running in the axial direction, into which the mandrel 19 can be pressed. In the area of one end face, a solid insert 23 is connected to the buffer piece 18.

' which is plate-shaped and has a central bore 24 for receiving a fastening screw 25. The conical stop member 17, which forms a mandrel 19, has a diameter on its end face 26 facing away from the carriage 13 that is equal to or slightly smaller than the inner diameter of the recess 22. The inclination runs towards the carriage 13.

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of the truncated cone-shaped dome 19, so that the area of the dome that comes into contact with the carriage 13 has a larger diameter than the inner diameter of the recess 22 of the buffer piece 18.

While the mandrel 19 is made of a hard material, such as metal and possibly steel, the buffer piece 18, which is designed as an annular sleeve, is made of an elastic material, such as rubber or plastic. The plate-shaped solid insert 23, however, also consists of a solid material, such as metal. When the mandrel 19 attached to the carriage 13 comes into contact with the fixed buffer piece 18 when the door leaf 14 is thrown open, this mandrel 19 penetrates the buffer piece 18 more or less deeply depending on the kinetic energy imparted to the door leaf, the axial force exerted by the door leaf being converted into a radial force which serves to expand the buffer piece 18. As the depth of penetration of the dome 19 into the buffer piece 18 increases, the mandrel is subjected to an increasing resistance force resulting from the elasticity of the buffer piece 18, so that the kinetic energy of the door leaf is completely destroyed and the door leaf comes to a stop before the front surface 26 of the dome 19 hits the solid insert 23 in the buffer piece 18. After the opened door leaf has come to a standstill, the buffer piece 18 encloses the mandrel 19 with an elastic force and holds this mandrel and thus the door leaf in the open position. It is understood that the angle of inclination of the dome 19 must be above the self-locking, but must not be so great that the door leaf 14 springs back. If the angle of inclination of the mandrel 19 is selected accordingly, the door leaf can also be

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move again slightly in the opposite direction, whereby the mandrel 19 leaves the recess 22 of the buffer piece.

In the embodiment shown in the drawing, the mandrel is movable due to its attachment to the carriage 13, while the buffer piece 13 attached to the stop plate 16 remains stationary. However, it is also possible to arrange the buffer piece 18 on the carriage and to attach the mandrel 19 to the adjustable stop 16. The embodiment shown and described above only represents the invention as an example, and is by no means limited to this. For example, it is also possible to use the buffer device not only for sliding doors but also for swing doors, swinging doors, etc. In addition, it is also possible to dampen the closing movement of a door leaf with the buffer device according to the invention in addition to the opening movement.

DiPL.-PHYs. BUSE · DiPL.-PHYS. MENTZEL · dipl.-ing. LUDEWIG Unterdörnen 114 · PO Box 200210 · 5600 Wuppertaf 2 . Telephone (0202) 557022/23/24 - Telex 8591 öO6 wpat

37 5600 Wuppertal 2, the

Password: "expansion buffer"

Dorma-Baubeschlag GmbH & Co. KG, Breckerfeider Str. 42-48, 5828 Ennepetal

List of reference symbols:

11 Track 12 Carriage 13 Carriage 14 Door leaf 15 Lifting screw 16 adjustable stop 17 Stop link 18 Buffer piece 19 mandrel 20 Mounting hole 21 Fixing screw 22 Recess 23 Solid body insert 24 drilling 25 Fixing screw 26 Frontal area

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Claims (5)

dipl.-phys.BUSE · DiPL-PHYS.MENTZEL · dipl.-ing. LUDEWIG Unterdörnen 114 · PO Box 200210 · 5600 Wuppertal 2 - Telephone (0202) 557022/23/24 . Telex 8591606 wpat 5600 Wuppertal 2, the Password; "expansion buffer" Dorma-Baubeschlag GmbH & Co. KG/ Breckerfeider Str. 42-48, 5828 Ennepetal Expectations : 1.) Buffer device for dampening the impact of doors, in particular sliding doors, with a stop member and an elastic buffer piece that slows down the impact of the door leaf, 5 characterized, that the stop member 17 is designed as a rearwardly expanding mandrel 19 which can be inserted into an elastically expandable recess 22 of the buffer piece 18. 2.) Buffer device according to claim 1, characterized in that both the mandrel (19) and the buffer piece (18) each have a circular cross-section. 3.) Buffer device according to claim 1 and/or 2, characterized in that the mandrel (19) has the shape of a truncated cone and that the buffer piece (18) is designed as an annular sleeve whose inner diameter is equal to or slightly larger than the smallest diameter of the truncated cone-shaped mandrel (19). &bull;# 4.) Buffer device according to one or more of the preceding claims, characterized in that the elastic buffer piece (18) is firmly connected to a solid body insert (23) enabling its fastening. 5.) Buffer device according to one or more of the preceding claims, characterized in that the mandrel (19) is fixedly assigned to the carriage (13) and the buffer piece (18) is fixedly assigned to an adjustable stop (16).