DE29809193U1 - Electrically operated cabinet doors - Google Patents

Description

Roland Heinke, Fischbach 13 a, D-35418 Buseck

and

Wolfgang Klemm, Buchenstrasse 16, D-35708 Haiger

Electrically operated cabinet doors

Description:

The invention relates to a piece of furniture, in particular a cupboard or a shelf, which is closed with a folding door according to the preamble of claim 1. Such a piece of furniture is described in EP 0 433 726 B1 with its advantages, in particular compared to cupboards with rollable cover devices.
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Such pieces of furniture are often used in lecture halls to store screens, video and audio playback devices. Screens and projectors can also be built into such pieces of furniture. It is also possible to integrate a (mobile) service station into such a piece of furniture.

Lectures are usually used to present a product or a piece of work and the speaker is interested in appearing as professional as possible in order to leave the best possible impression on the audience. In order to make the presentation as interesting and understandable as possible, media (films, videos, audio documents, graphics, statistic) are often used.

stiken, ...)/ but also computers (program demonstrations, computer simulations).

To enable a single speaker to manage a lecture that involves a variety of technical equipment alone and without major interruptions, a high degree of automation of the equipment and the technical facilities in the lecture hall has been implemented. The speaker can often operate all the equipment *from a single source ⁷ from the lecture desk.

Nowadays, screens, projectors and other devices are ready for use in their cabinets from the beginning of the presentation to the end of the event. However, the open pieces of furniture, especially if there are several, spoil the overall impression of an otherwise successful and professional presentation. However, a presentation assistant who opens and closes the cabinets is too expensive. This, in conjunction with the advantages of folding doors mentioned in EP 0 433 726 Bl, creates a need for automatically opening and closing folding doors.

In addition, it is conceivable that automatically opening and closing pieces of furniture could be used in automated warehousing and in work areas with a high risk potential for people (e.g. genetic engineering laboratories).

The invention is based on the object of designing pieces of furniture with electrically operated folding doors in such a way that they are simple to construct, inexpensive to manufacture and safe to operate.

According to the invention, the object is achieved in that a rod is mounted between two sides of two door leaves of a pair of door leaves that can be pivoted towards one another, which rod can be rotated on one door leaf in a plane perpendicular to the axis of the joint connection and on the other door leaf

is mounted so that it can move along it, and that a first drive is mounted in one of the two bearings. The first drive causes the rod to move on one of the door leaves and to rotate the rod in the pivot bearing. The forces and torques applied by the first drive act in the two bearings of the rod and thus lead to a relative movement of the two door leaves of the door leaf pair. By mounting a door leaf on the piece of furniture, the relative movement of the door leaves leads to the opening and closing of the folding door. The design of the invention is the subject of subclaims 2 to 18.

According to the invention, the drive-rod system can be designed in such a way that the first drive is a servomotor that is attached to one of the two leaves of a pair of door leaves so that its shaft is parallel to the pivot axis of the door leaves. The rod is attached to the shaft in such a way that it reaches over to the other door leaf and is slidably mounted on it. For this purpose, the rod can be guided through one or more brackets.

According to the invention, the drive-rod system can be designed in such a way that the first drive causes a linear displacement of the rod in a guide on the door leaf and the rod is articulated on the other door leaf. The drive can be designed as a linear motor for this purpose.

To ensure that the opened folding doors do not protrude into the room, they can be pushed into the cupboard in a guide when folded up.

For this purpose, the support can be attached to the back of the piece of furniture using scissors, and these scissors can be used to extend and retract the scissors using a second drive. A partition can separate the inserted folding door from the inside of the piece of furniture.

According to the invention, the rod can be bent and/or resilient and/or designed as a rack.

Furthermore, according to the invention, a first sensor system, which can be attached to a pair of door leaves, can cause the first drive to be switched off when the folding door is in the open position, and a second sensor system, which can also be attached to the door leaf, can do the same if the door leaves of the pair are approximately 180° apart. Both sensor systems can form a structural unit.

Preferably, the folding door consists of an even number of door leaves.

According to the invention, the piece of furniture can be designed as a chest because the opening to be closed by the folding door faces upwards.

An embodiment of the invention is described in more detail below with reference to the drawing. It shows a schematic representation:

Fig. 1 a piece of furniture designed according to the invention
a partially unfolded
Folding door

Fig. 2 shows a rod drive system on a
trained door leaf pair

Fig. 3 a top view corresponding to Fig. 2

Fig. 4 a top view of the piece of furniture 1 with
with the lid lifted and the
Folding door
40

Fig. 5 corresponding to Fig. 4 with extended but

folded folding door

Fig. 6 corresponding to Fig. 5 with partially unfolded
Folding door
10

Fig. 7 corresponding to Fig. 8 with fully unfolded
folding door.

A pair of scissors 10 is attached to the rear wall (not shown) of the piece of furniture (1) shown in Fig. 1. This pair of scissors can be extended and retracted using the drive 11. A support 4 is attached to it, to which in turn an outer door leaf 3 of a pair of door leaves 3, 5 is articulated. The direction of the axis formed by this articulated connection is referred to below as the pivot axis 20. A second articulated door leaf is attached to the outer door leaf parallel to the pivot axis 20. This is guided by a roller 18 in a rail 22 (not shown) perpendicular to the pivot axis 20 and perpendicular to the side wall 23 of the piece of furniture 1. A servomotor 7 is attached in a first recess 16 on the second door leaf 5 of the pair of door leaves, the shaft 8 of which is parallel to the pivot axis. A second recess 17 is mounted on the outer door leaf 3 in such a way that it partially accommodates the actuator 7 when the pair of door leaves is folded together. A rod 6 is attached to the shaft 8 of the actuator 7, the free end of which is freely movable in brackets 12 mounted on the first door 3. The torques applied in the actuator 7 are transmitted to one door leaf 3 by the fastening of the actuator 7 and to the other door leaf 5 by the rod 6, so that a relative movement occurs between the door leaves of the pair of door leaves. This relative movement of the door leaves of the pair of door leaves is converted into an opening and closing of the folding door 2 by the mounting of the outer door leaf 3 on the support 4. A

The first sensor system 13 applied to the pair causes the actuator 7 to switch off when the two door leaves are at about 180° to each other. If the door leaves of the pair of door leaves are folded towards each other, a second sensor system 14 switches off the actuator 7. The two sensor systems 13 and 14 and the actuator 7 are supplied via lines 19.

In Fig. 2, the rod-actuator system on the pair of door leaves can be seen. In detail, the guide of the rod 6 in the brackets 12 on one of the door leaves 3 and the fastening of the rod 6 to the shaft 8 of the actuator 7 are shown. Also visible are the two recesses 16 and 17, which serve to accommodate the actuator when the pair of door leaves is folded together.

In Fig. 3, you can clearly see a bend in the rod 6. This bend serves to prevent the rod from jamming when opening or closing the folding door.

Fig. 4 to 7 show the process of closing the piece of furniture 1 using the folding door 2. Fig. 4 and 5 show the folding door 2 being extended from the piece of furniture 1 using the second drive, in the end positions. Fig. 6 shows the folding door 2 in a partially opened state. Compared to Fig. 4 or 5, the shaft 8 of the actuator 7 with the rod 6 attached to it is rotated relative to the door leaf. Fig. 7 shows the folding door in its closed end position.

List of reference symbols:

1 furniture 2 Folding door 3 outer door leaf 4 carrier 5 inner door leaf 6 pole Actuator 8th Actuator shaft 9 guide 10 Scissors 11 second drive 12 Brackets 13 first sensor system 14 second sensor system 15 Partition wall 16 first deepening 17 second deepening 18 role 19 cables 20 Swivel axis 21 Back wall 22 rail 23 Side wall

Claims (18)

Roland Heinke, Fischbach 13 a, D-35418 Buseck and Wolfgang Klemm, Buchenstraße 16, D-35708 Haiger Electrically operated cabinet doors Claims: 1. Piece of furniture (1), in particular a shelf or cupboard, with a folding door (2) consisting of at least two door leaves, the outer door leaf (3) of which is hinged to a side support (4), that a second door leaf (5) is hinged to the outer door leaf, which is guided on the side opposite the axis of the hinge connection with the outer door leaf in a direction perpendicular to the axis of the hinge connection, the pivot axis (20), and that any number of further correspondingly designed and arranged door leaf pairs can be connected to it, 40 characterized in that a rod (6) is mounted between two sides of two door leaves (3, 5) of a pair of door leaves that can be pivoted towards one another, which rod is rotatable on one door leaf (5) in a plane perpendicular to the pivot axis (20) and is mounted (12) on the other door leaf (3) so that it can be displaced along the same, and that a first drive (7) is mounted in one of the two bearings. 2. Piece of furniture according to claim 1, characterized in that on one of the two door leaves of this pair of door leaves (3, 5) a servomotor (7) is attached as the first drive, the shaft of which is parallel to the pivot axis (20) of the door leaf, that the rod (6) is attached to the motor shaft (8) of the servomotor (7), which engages over the two door leaves and is guided on the door leaf (3) perpendicular to the pivot axis. 3. Piece of furniture according to claim 1, characterized in that on one of the two door leaves (3, 5) that can be pivoted towards each other, a motor that moves the rod (6) along the door leaf (5) is mounted as the first drive and the rod (6) is rotatably mounted on the other door leaf (3). 4. Piece of furniture according to claim 3, characterized in that the motor is designed as a linear motor. 5. Piece of furniture according to one of claims 1 to 4, characterized in that the support (4) with the folded folding door (2) can be pushed in and out of the cupboard in a guide (9). 6. Piece of furniture according to claim 2, characterized in that the support is attached to the rear wall (21) of the piece of furniture (1) via scissors (10). 7. Piece of furniture according to claim 3, characterized in that between the scissors (10) and the piece of furniture (1) a second drive (11) causes the support (4) to be extended and retracted. 8. Piece of furniture according to one of claims 1 to 3, characterized in that the rod (6) is bent away from the folding door (3) at its displaceably mounted end. 9. Piece of furniture according to one of claims 1 to 8, characterized in that the rod (6) is guided in at least one holder (12). 10. Piece of furniture according to one of claims 1 to 9, characterized in that the rod (6) is designed as a rack. 11. Piece of furniture according to one of claims 1 to 10, characterized in that the rod (6) is resilient. 12. Piece of furniture according to one of claims 1 to 11, characterized in that a first sensor system (13) is mounted between each two door leaves (3, 5), which detects whether the door leaves (3, 5) are folded together and causes the first drive to be switched off. 13. Piece of furniture according to one of claims 1 to 12, characterized in that between each two door leaves (3, 5) a second sensor system (14) is mounted, which detects whether the door leaves (3, 5) are at an angle of approximately 180° to each other and causes the first drive to be switched off. 14. Piece of furniture according to one of claims 12 and 13, characterized in that the first (13) and the second sensor system (14) form a structural unit. 15. Piece of furniture according to one of claims 1 to 14, characterized in that the folding door (2) consists of an even number of door leaves. 16. Piece of furniture according to claim 5, characterized in that the inserted folding door (2) is separated from the interior of the piece of furniture by an intermediate wall (15). 17. Piece of furniture according to one of claims 1 to 16, characterized in that the first drive is embedded in a first recess (16) in the door leaf (5). 18. Piece of furniture according to claim 17, characterized in that a second recess (17) is formed on the door leaf (3) opposite the first drive (7), which receives the first drive when the pair of door leaves is folded together.