EP2871314B1 - Piece of furniture and monitoring system for sliding doors of the piece of furniture - Google Patents

Description

The present invention relates to a piece of furniture with two parallel sliding doors and with a monitoring system for monitoring the closed position of parallel sliding doors.

Furniture, such as cabinets, showcases and showcases, usually have a space for storing or presenting items. The space is usually closed by doors to prevent access to the room and thus to the object. A known variant of furniture has parallel sliding doors.

Further, it is known to provide a lock device which allows a closing of the sliding doors, so that unauthorized access to the space of the furniture is not possible. This is essential for furniture used in a publicly accessible area, such as museum showcases, showcases or generally shop furniture, in order to protect the items stored in the furniture. In particular, in connection with a lock device, it is known to provide a monitoring system for monitoring the closed position of the sliding doors, so that, for example, an automatic closing operation can be performed via the monitoring system.

Out DE 103 23 696 B4 is a furniture with sliding glass doors known in which a closed system parallel sliding doors are lockable. The sliding doors are guided over running profiles in rails. Below the rails, a locking system is arranged, which engages with a latch recesses in the rails and engages with the latch in recesses in the running profiles to lock the sliding doors. The locking system has a magnetic switch which cooperates with encoder elements in the running profiles and determines the closed position of the running profiles. The The previously known locking system interacts with the sliding doors from the underside of the room, so that the entire locking system is arranged below the space of the piece of furniture embedded in the floor. Such an arrangement of the locking system is not possible for furniture with glass shelves, such as showcases, since in a glass bottom no recess for the lock device can be created. An arrangement of the lock device would therefore possibly be possible below the ground, which, however, no security against manipulation is given. In addition, such a locking system would be visible on the underside of the showcase, which is unfavorable for aesthetic reasons.

In addition, the magnetic switch, which can act as a monitoring device, can be easily manipulated by external magnets. Furthermore, the closing position of the running profiles is determined with the monitoring device. However, it can not be determined whether a lock can take place if, for example, by tilting one of the doors, the locking elements are not in position for the locking operation, but the magnetic switch detects the closing position. In particular, in the use of a locking mechanism which locks the sliding doors against each other, such a monitoring system is unfavorable, since it can not be determined with sufficient certainty whether a locking of the sliding doors can take place against each other. Therefore, the previously known monitoring device is only conditionally usable and error-prone.

It is therefore an object of the present invention to provide a piece of furniture with monitoring system for monitoring the closed position of parallel sliding doors of the piece of furniture, which is of simple construction and is particularly tamper-resistant. In particular, the monitoring system should be used advantageously for furniture with glass shelves.

The furniture according to the invention with monitoring system is defined by the features of claim 1.

The furniture according to the invention with two parallel sliding doors for closing a room of the piece of furniture and with a monitoring system for monitoring the closed position of parallel sliding doors of a piece of furniture, wherein the sliding doors partially overlap in the closed position, has a first sensor element for a first sliding door and a second Sensor element for a second sliding door and a sensor, wherein the sensor senses a covering of the first and the second sensor element in the presence of the closed position of the first and the second sliding door. The first and the second sensor element are thus arranged in the first and the second sliding door in the areas which partially overlap in the closed position. Since in these areas can also engage a lock device which locks the first and the second sliding door against each other, can be advantageously determined with the monitoring system, whether the sliding doors are in a closed position in which a closure by means of a lock device is possible. The monitoring system can thus advantageously be combined with an automatic lock device by generating a signal for triggering the lock device when the closed position is detected by the monitoring system. In addition, the monitoring system is particularly tamper-proof, since the position of the first and the second sensor element is sensed to one another. The sensor can be arranged, for example, advantageously within the piece of furniture, whereby the monitoring system is protected against external access.

The monitoring system can be used advantageously for furniture in the form of showcases or shop furniture in which, for example, during normal business operations, the sliding doors are not closed in order for the sales staff to allow simplified access to stored in the piece of furniture goods. To ensure that no unauthorized access to the goods takes place, the monitoring system monitors the closed position of the sliding doors and can cooperate with an optical or acoustic warning signal generator. In case of unauthorized opening of the sliding doors can be generated in this way a warning signal. Depending on the accuracy requirement of the detection of the closed position, the sensor can sense an at least partial covering of the sensor elements or an exact alignment. The high accuracy present in the case of exact alignment of the sensor elements is necessary in particular in the interaction of the monitoring system with an automatic locking system, in which an exact position of the sliding doors is required for carrying out the closing operation.

According to the invention, the sensor is designed as a distance sensor.

It is provided that in the closed position of the first and the second sliding door, the sensor measures a distance of the second sensor element from the sensor through the first sensor element.

By means of a distance measurement, the covering of the first and the second sensor can be determined in a particularly advantageous manner. In the event that the first sliding door, which faces the sensor designed as a distance sensor, is not in the closed position, the sensor detects too short a distance, namely the distance between the first sliding door and the sensor. In the case where the first sliding door is in the closed position, but the second door is not in the closed position, the sensor also detects too short a distance, namely the distance between the second sliding door and the sensor passing through the first sensor element is measured. Of course, the second sensor element must have a different distance from the surrounding area of the second sliding door to the sensor in order to enable a reliable measurement.

The sensor can be designed, in particular, as an optical sensor, for example as an IR diode with a receiver, wherein the first sensor element is optically transparent. By "optically transparent" is meant a transparency of, for example, at least 90%. Of course, the first sensor element only has to have a corresponding transparency for the wavelength of the optical sensor.

By such a design of the first sensor element, a possibility can be created in a simple manner that the distance of the second sensor element is optically measured through the first sensor element.

The first sensor element may be formed in particular as a through hole.

The second sensor element may be formed as a blind hole. Such a design of the first and second sensor element enables the optical detection of the closed position of the sliding doors in a particularly simple manner, since an optical measurement signal of the sensor can be sent to the second sensor element in an advantageous manner by the first sensor element designed as a through hole. As a result of the design of the second sensor element as a blind hole, the bottom of the blind hole is set back relative to the remaining part of the second sliding door, so that there is a different distance from the sensor in the optical distance measurement, whereby the closed position of the second sliding door is detected in a particularly advantageous manner can be.

It can be provided in an advantageous manner that the blind hole has a bottom which has a electromagnetic radiation diffusely reflecting or absorbing coating. This coating is diffusely reflecting or absorbing in particular for electromagnetic radiation with the wavelength of the optical signal of the optical sensor. This will achieve that the optical sensor in the distance measurement to the second sensor element receives a very weak return signal, whereby a clear difference to the signal is produced by the distance measurement of the second sensor element surrounding part of the second sliding door in the absence of a closed position of the second sliding door. As a result, a particularly accurate determination of the closed position is possible. In one embodiment of the invention can also be provided that the second sensor element is formed as a through hole. As a result, the sensor designed as a distance sensor receives no or only a very weak return signal when a measurement signal is emitted by the first and second sensor elements, as a result of which the covering of the first and the second sensor element and thus the determination of the closed position of the first and the second sliding door are advantageous Way can be sensed.

The monitoring system of the piece of furniture according to the invention may have a first profile for the first sliding door and a second profile for the second sliding door, wherein the first sensor element is arranged in the first profile and the second sensor element in the second profile. It can be provided that the first profile is formed by a first closing profile of a lock device and the second profile by a second closing profile of the lock device, wherein the lock device, the first and the second closing profile against each other are locked.

In this way, the monitoring system can be integrated in a structurally simple manner in the already existing closing profile of a lock device. Moreover, such a construction allows the first and second sensor elements to be located in the vicinity of the lock device of the lock device, whereby the monitoring system can be advantageously used for automatic control of a lock device, since the detection of the closed position of the sliding doors in the area, in which the lock device acts, is detected. This avoids the possibility of a faulty control, which could arise, for example, with a slight tilting of the sliding doors, if the sensor elements have a large distance from the lock device.

In a particularly preferred embodiment of the invention, a first reflective strip for the first sliding door and / or a second reflective strip for the second sliding door is provided, wherein the first and / or the second bar in the sliding direction of the sliding door extend, and wherein the first bar and / or the second strip cooperates or interacts with the sensor in a position deviating from the closed position of the first and / or the second sliding door. A "reflective strip" is understood to be a strip with a surface reflecting the wavelength of the signal of the sensor. This ensures that the sensor receives a clear signal in a deviating from the closed position position of the first and / or the second sliding door, which is not distorted by a diffuse scattering or absorption of the optical signal. As a result, a particularly reliable and accurate monitoring by means of the monitoring system is possible.

The monitoring system may include a signal generator that generates a control signal for an automatic lock device when the sensor senses the closed position of the sliding door.

The sensor can be arranged in a sensor housing, which can be arranged in an advantageous manner in the interior of the piece of furniture. The sensor housing may, for example, have a vertical extension that is equal to or less than a vertical height of the first and / or second strip. This ensures that at least in a viewing direction orthogonal to the bar, the sensor housing is covered by the bar.

The furniture according to the invention with monitoring system can advantageously with the German patent application 10 2013 216 360.6 "Locking system for sliding doors of a piece of furniture, as well as piece of furniture" Applicant (Willach) described lock device can be combined. In this lock device is provided that partially overlap the first and the second closing profile in the closed position of the sliding doors. The lock device is formed automatically or remotely operable and has a locking device, wherein the locking device engages in a closed position in the first and the second locking profile. The lock device is arranged on the furniture piece facing side of the sliding doors and the locking device penetrates in the closed position from this side, the first locking profile and engages in the second locking profile. The arrangement of the lock device on the space-facing side of the closing profiles prevents access from the outside to the lock device. The lock device may comprise a locking device, which is formed in two parts, wherein a first latch member is drivable and a second latch member is mounted in the first closing profile. The first latch part is driven to reach the closed position and causes the second latch part mounted in the first latching profile to be pressed in the direction of the second latching profile, so that the second latching part engages in the second latching profile in the closed position. The lock device may comprise a drive which is arranged in a drive housing. The drive housing of the lock device can for example also form the sensor housing of the sensor according to the invention.

Further embodiments of such a lock device are in the patent application DE 10 2013 216 360.6 described in detail.

The combination of the monitoring system with the lock device described above has the particular advantage that they can be arranged very close to each other and can act in a parallel direction, ie that the signal emitted by the monitoring system is parallel to the drive direction of the locking device. As a result, a particularly reliable control of the lock device is possible.

Under furniture in the invention are understood in addition to conventional furniture and showcases showcases that are used in public areas, such as museum showcases and the like. The pieces of furniture can also be shop furniture, which are used for example in retail.

In one embodiment of the invention it is provided that the piece of furniture is a glass cabinet with glass bottom.

The monitoring system may be located on a floor of the room. It is preferably provided that two parallel rails are arranged, wherein the first and the second profile and / or the reflective strips are formed by running profiles of the sliding doors, which engage in the rails.

In some lock devices, there is a problem that by pushing the first sliding door toward the inside of a piece of furniture, the first sliding door can be pushed away from the lock device of the lock device, thus allowing unauthorized opening of the sliding door. However, the closing profile is pressed in the direction of the interior of the piece of furniture. About the monitoring system of the furniture according to the invention, such a manipulation can be detected, since the distance of the closing profile when pressing in the direction of the interior of the piece of furniture and moving towards the open position below the distance is the closing profile in a deviating from the closed position position of the first sliding door from Sensor has. The monitoring system can thus detect manipulation attempts by measuring an impermissibly small distance. Also, a lifting one of the sliding doors can be detected by the monitoring system, as this can get the sensor elements from their coverage area.

In the following an embodiment of the invention will be explained in more detail with reference to the following figures.

Figur 1

eine schematische, perspektivische Ansicht einer erfindungsgemäßen Ausführungsform eines Möbelstücks,

Figur 2

eine schematische Detailansicht der Profile der Schiebetüren des Möbelstücks gemäß Fig. 1,

Figur 3

eine schematische Schnittdarstellung des Überwachungssystems des Möbelstücks und

Figuren 4a und 4b

eine schematische Schnittdarstellung durch eine Riegelvorrichtung einer Schlossvorrichtung, mit der das Überwachungssystem zusammenwirkt.

Show it:

FIG. 1

a schematic, perspective view of an embodiment of a piece of furniture according to the invention,

FIG. 2

a schematic detail view of the profiles of the sliding doors of the furniture according to Fig. 1 .

FIG. 3

a schematic sectional view of the monitoring system of the piece of furniture and

FIGS. 4a and 4b

a schematic sectional view through a locking device of a lock device with which cooperates the monitoring system.

In Fig. 1 an inventive piece of furniture 100 is shown in a schematic perspective view. The piece of furniture 100 is designed as a display case, which has glass walls 102, a glass ceiling 104 and a glass bottom 106, which enclose a space 108. At the front, the space 108 is bounded by a first sliding door 110 and a second sliding door 112 formed as sliding glass doors. The first sliding door 110 and the second sliding door 112 are parallel over rails 114, which are best in Fig. 2 are recognizable, guided. For this purpose, the first sliding door 110 and the second sliding door 112 on running profiles 116, which engage in the rails 114. The running profiles 116 may be formed, for example, as aluminum profiles, which surround the glass panes of the sliding glass doors.

In the room 108 of the furniture, a monitoring system 1 is arranged. How best Fig. 2 it can be seen from the tread 116 of the first sliding door 110, a first profile 3 is formed, whereas from the running profile 116 of the second sliding door 112, a second profile 5 is formed. The first profile 3 and the second profile 5 are parts of the monitoring system 1.

How best Fig. 3 it can be seen, the monitoring system 1 has a first sensor element 4 for the first sliding door 110 and a second sensor element 6 for the second sliding door 112. The first sensor element 4 is arranged in the profile 3. The second sensor element 6 is arranged in the profile 5. Furthermore, the monitoring system 1 has a sensor 8 which interacts with the first and second sensor element 4, 6. The sensor 8 is designed as an optical distance sensor and transmits an optical measurement signal in the direction of the sliding doors 110, 112. The first sensor element 4 is formed as a through hole. The second sensor element is designed as a blind hole. In the closed position of the sliding doors 110,112, the in Fig. 3 is shown, the first and the second sensor element 4,6 overlap, so that the optical signal of the sensor 8 can penetrate the first sensor element 4 and reaches the second sensor element 6. From the bottom 6a of the second sensor element 6, the signal is reflected, so that the distance sensor 8 can measure a distance to the bottom 6a. The optical signal may be an electromagnetic radiation emitted by the sensor 8.

The sensor 8 detects the light reflected from the bottom 6a of the second sensor element 6 in the direction of the sensor 8 and thus determines a distance.

If the second sliding door 112 is in a position deviating from the closed position, the optical signal of the sensor 8 is reflected by the surface 5a of the profile 5 surrounding the sensor element 6, so that a different distance is detected. As a result, the monitoring system can determine that not both sliding doors 110, 112 are arranged in the closed position. If the first sliding door 110 is not in the closed position, detects the Sensor 8 the distance of the surface 3a of the profile 3 from the sensor and thus determines that the first sliding door 110 is not in the closed position.

The bottom 6a of the second sensor element 6 can have a coating that is diffusely reflecting or absorbing for the electromagnetic radiation of the measuring signal of the sensor 8. This ensures that the sensor 8 receives only a very low return signal, whereby the sensor 8 receives a significantly different from the return signal of the surface 5a of the profile 5 return signal, so that the closed position can be detected by the sensor 8 with very high reliability.

The sensor 8 is arranged in the space 108 of the piece of furniture and thus protected against access from the outside.

The sensor 8 may be arranged in a sensor housing 11 which is covered by the running profiles 116. The running profiles 116 may form a first reflective strip for the first sliding door 110 and a second reflective strip for the second sliding door 112, which interact with the sensor 8 in a position deviating from the closed position of the first and the second sliding door 110,112. Of the reflective strips, the optical signal of the sensor 8 is reflected in an advantageous manner to the sensor 8, so that this receives a well evaluable return signal. As a result, a deviating from the closed position position of the sliding door 110,112 can be determined in a particularly advantageous manner and with high security.

The monitoring system 1 can interact with a lock device 7.

The lock device 7 may be formed automatically or remotely operable. The lock device 7 has a locking device 9, the best of the FIGS. 4a and 4b is apparent. The locking device 9 cooperates in the closed position with the first and the second profile 3.5 to the Complete sliding doors in their closed position and thus to prevent unauthorized access to the space 108 of the piece of furniture 100. The profiles 3.5 are formed as closing profiles.

The lock device 7 is arranged in the space 108, wherein the locking device 9 from the space 108 facing side of the sliding doors 110,112 cooperates with the first and the second profile 3,5.

The lock device 7 is designed as a structural unit with the monitoring system 1. In the common housing 11, a drive, for example a servomotor, for the locking device 9 is arranged. Further, for the monitoring system 1 and the lock device 7, a receiver for a remote control unit, a control electronics, a battery, a warning sensor, which may be formed, for example, optically or acoustically, may be provided. The lock device 7 may further include a closing sensor which checks whether the locking device 9 is extendable. Signals can be output via the warning transmitter if the sliding doors 110, 112 are moved out of the closed position, or if the lock device 7 could be switched to the closed position. The housing 11 is preferably elongated and narrow and arranged parallel to the rails 114, wherein the vertical extent is smaller than the vertical height of the first and the second profile 3,5 and the running profiles 116. Thereby, the housing 11, as in Fig. 2 It can be seen, in a viewing direction orthogonal to the running profiles 116 of the running profiles 116 hidden in an aesthetically advantageous manner.

The running profiles 116 have on their underside grooves 118, via which the running profiles 116 can be placed on the running rail 114. In this case, in the vertical direction, an overlap H between the running profiles 116 and the rails 114, wherein the cover H describes the vertical distance that a running profile 116 must be raised in order to be lifted out of the running rail 114.

How best of the FIGS. 4a and 4b it can be seen, the locking device 9 is formed in two parts and consists of a first latch member 13 and a second latch member 15. The first latch member 13 is driven by the drive of the lock device 7.

The second latch part 15 is mounted in a through-opening 17 of the first profile 3 and can from the first latch part 13 of the in Fig. 4a shown opening position against the spring force of a spring 19 in the in Fig. 4b shown closed position to be pressed. In the closed position, the second latch part engages in a blind hole 21 in the second profile 5, so that the first and the second profile 3.5 are locked against each other.

When unlocking the lock device 7, the first latch part 13 of the drive of the lock device 7 in the in Fig. 4a shown open position, wherein the spring 19, the second latch member 15 in the in Fig. 4a pushed back position shown. In this position, the second latch member 15 is flush with both sides of the first profile 3 from.

Like from the FIGS. 4a and 4b can be seen, the first latch member 13 has a smaller dimension than the second latch member 15 and the through hole 17. In the embodiment shown, the first latch member 13, the second latch member 15 and the through hole 17 have a round cross section, so that the diameter of first latch member 13 is smaller than the diameter of the second latch member 15 and the through hole 17. A tilting of the first latch member 13 in the through hole 17 can thus be avoided. Furthermore, it is prevented that assembly inaccuracies lead to malfunction.

The dimension D of the through hole 17 in the vertical direction and the dimension d of the first bolt part 13 in the vertical direction are selected such that the difference in the dimension D and the dimension d is smaller than the overlap H of the running profiles 116 and the rails 114 in the vertical direction , In other words: D - d <H. This ensures that the maximum possible clearance between the passage opening 17 and the first latch part 13 is not sufficient to lift the first sliding door 110 and the running profile 116 so far from the rail 114 that the first sliding door 110 can be excavated. The lifting is thus prevented by the first latch member 13.

The blind hole 21, in which the second latch member 15 engages, can, as in Fig. 2 is indicated, be designed as a slot. In this way it can be achieved that an intervention of the second latch member in the blind hole 21 can be made already before the second sliding door 112 is fully in its closed position. As a result, it can be ensured that the second sliding door 112 can be closed, even if, for example, due to soiling on the rail 114, the second sliding door 112 can not be completely moved into the closed position, but for example stops a few millimeters before.

It can be provided that the dimension S of the blind hole opening 21 in the vertical direction is greater than the vertical dimension s of the second latch part 15. It is preferably provided that the vertical dimension S of the blind hole 21 is adapted to the vertical dimension s of the second latch part 15 , Of course, it is also possible that the vertical dimension S of the blind hole 21 is a few millimeters larger than the vertical dimension of the second latch member 15, so that in the vertical direction between the second latch member 15 and the blind hole 21 a game arises. It can thereby be achieved that any offset in the vertical direction, which can be caused for example by contamination of the running rail 114, does not lead to a malfunction of the lock device 7.

The monitoring system 1 can also take this circumstance into account by designing the sensor elements 4, 6 accordingly and / or the sensor 8 already detects a partial overlap of the sensor elements 4, 6 as the closed position of the sliding doors 110, 112.

The difference between the vertical dimension S of the blind hole 21 and the vertical dimension s of the second locking part 15 is to be chosen so that it is smaller than the coverage H between the running profiles 116 and the running rail 114, so that between the second locking part 15th and the blind hole 21 maximum play is not sufficient to lift the second sliding door 112 of the rail 114.

In an embodiment in which the lock device 7 does not prevent the lifting can be detected via the monitoring system 1, a lifting of the first or second sliding door 110,112. For this purpose, it can be provided, for example, that the vertical extent of the first and / or the second sensor element 4, 6 is adapted to the coverage H, so that when the first or second sliding door 110, 12 is lifted, the sensor elements 4, 6 fall out of their coverage area and the sensor 8 indicates a deviating from the closed position of the sliding doors 110,112 position.

Characterized in that the monitoring system 1 and the lock device 7 are arranged in the space 108 and act from the space 108 facing side, a particularly tamper-proof arrangement is possible.

Claims (12)

1. Piece of furniture (100), comprising two sliding doors (110,112) guided in parallel for closing a space (108) of the piece of furniture (100), and a monitoring system (1) for monitoring the closing position of the sliding doors (110,112) guided in parallel,
   wherein the sliding doors (110,112) partially overlay in the closing position, comprising a first sensor element (4) for a first sliding door (110) and a second sensor element (6) for a second sliding door (112), and a sensor (8), characterized in that the sensor (8) senses an overlaying of the first und the second sensor elements (4,6) when the first and the second sliding doors (110,112) are in the closing position, wherein the sensor (8) is configured as a distance sensor, and wherein, in the closing position of the first and the second sliding doors (110,112), the sensor measures a distance of the second sensor element (6) from the sensor (8) through the first sensor element (4).
2. Piece of furniture according to claim 1, characterized in that the sensor (8) is configured as an optical sensor, wherein the first sensor element (4) is optically transparent.
3. Piece of furniture according to claim 1 or 2, characterized in that the first sensor element (4) is configured as a through hole.
4. Piece of furniture according to any one of claims 1 to 3, characterized in that the second sensor element (6) is configured as a blind hole or as a through hole.
5. Piece of furniture according to claim 1, characterized in that the blind hole comprises a base (6a) having a coating which diffusely reflects or absorbs electromagnetic radiation.
6. Piece of furniture according to any one of claims 1 to 5, characterized by a first profile (3) for the first sliding door (110) and a second profile (5) for the second sliding door (112), wherein the first sensor element (4) is arranged in the first profile (3) and the second sensor element (6) is arranged in the second profile (5).
7. Piece of furniture according to claim 6, characterized in that the first profile (3) is formed by a first locking profile of a lock device (7) and the second profile (5) is formed by a second locking profile of the lock device (7), wherein the first and the second locking profiles are lockable against one another by means of the lock device (7).
8. Piece of furniture according to any one of claims 1 to 7, characterized by a first reflecting strip for the first sliding door (110) and/or a second reflecting strip for the second sliding door (112), wherein the first and/or the second strips extend in sliding direction of the sliding doors (110,112), and wherein the first strip and/or the second strip cooperate with the sensor (8) in a position of the first and/or the second sliding doors (110,112) deviating from the locking position.
9. Piece of furniture according to any one of claims 1 to 8, characterized in that a signal encoder generates a control signal for an automatic lock device (7) when the sensor (8) senses the closing position of the sliding doors (110,112).
10. Piece of furniture according to any one of claims 1 to 9, characterized in that the piece of furniture (100) is a glass cabinet with a glass bottom.
11. Piece of furniture according to any one of claims 1 to 10, characterized in that the monitoring system (1) is arranged on a bottom (106) of the space (108).
12. Piece of furniture according to any one of claims 6 to 11, characterized by two running rails (114) arranged in parallel, wherein the first and the second profiles (3,5) are formed by running profiles (116) of the sliding doors (110,112) which engage the running rails (114).

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