EP2017418A1 - Cabinet, in particular security cabinet with folding doors - Google Patents

Abstract

The cabinet has a control device including an angle element (5), a push element (6) and blade bars (7, 8), arranged in a parallelogram-like position for door closing and in a triangular-like position for door opening. The control device is formed with the angle element pivotable around a pivot point, and with the push element attached to a door side. The push element operates on inner and outer wings of folding doors (2, 3). A connecting element (4) is angularly arranged in comparison with a door closing plane. The angle element is designed in the form of a triangular element.

Description

The invention relates to a cabinet, in particular folding door security cabinet, with at least two folding doors, each with outer wing and inner wing, and with a two folding doors coupling connecting element, which operates via a respective adjusting device on the associated folding door.

Such a cabinet is in the utility model DE 20 2004 004 855 U1 described. At this point each door is equipped with a synchronous lever and additionally with a steering lever. The synchronizer levers are hinged together via a connecting element, which can be moved in a guide. The guide extends perpendicular to a plane spanned by the doors in their cabinet body closing position and centrally between the axes of the doors.

In addition, one of the doors in the direction of the closed position kraftbeaufschlagendes spring element is realized, which extends along the guide and is included in this. In this way, a real synchronous movement of the doors is to be made possible without one of the doors of the other must lag or vice versa. In addition, the possibility should be created to lock the doors in the open position.

Although the known teaching has proven itself, which concerns the possibility of one-handed operation of the two folding doors as a result of the connecting element. However, the mechanical complexity is relatively large and the known kraftbeaufschlagende spring element is used throughout for the door closure. This spring element is a scroll spring, which cooperates with a fixing element. The fixing is a temperature-dependent fusible link with the Cabinet connected, so that in case of fire for an automatic door closure is taken care of. Here, however, functional impairments can not always be ruled out, because the well-known spring roll unfolds effect during every closing process and possibly shows or shows signs of fatigue. This is especially true for the temperature-dependent meltable connection element, so that in summary the reliability can not always be guaranteed especially in case of fire. This is where the invention starts.

The invention is based on the technical problem of further developing such a cabinet, in particular a folding-door safety cabinet, so that the reliability is increased on the basis of a simple mechanism.

To solve this technical problem, the invention proposes in a generic cabinet that the coupled via the connecting element and each acting on the folding doors two actuators in their respective parallelogram-like position for a door closure and in their respective triangular position provide for a door opening.

In contrast to the state of the art after the DE 20 2004 004 855 U1 Thus, a so-called synchronous movement of the adjusting devices takes place at the transition from the door closure to the door opening and back not directly, but changes the actuator here their topological shape. Thus, the adjusting device assumes a parallelogram-like position when the doors are closed or the door is closed. In contrast, the door opening corresponds to a triangular-like position of the respectively associated adjusting device.

In this context, it goes without saying that the transition from the parallelogram-like position to the triangular-like position and back again of both adjusting devices is of course simultaneous or nearly simultaneous, ie synchronous, takes place because both adjusting devices are coupled together by the connecting element. However, unlike the prior art, as described, the actuator changes its respective topological shape.

Overall, favorable leverage ratios are provided. For in the transition from the door closure to the door opening or to transfer the closed folding doors in the open position, is initially worked with relatively large lever arms in consequence of the parallelogram-like position of the actuating device, so that a large torque can be transmitted to the associated double door. As the door opening increases, the lever arms and consequently torques become smaller. At the same time, the finally achieved door opening corresponds to a particularly compact form of the adjusting device, namely its triangular-like position, so that the cabinet body is accessible practically unhindered, for example, to store chemicals or other safety-relevant substances.

That is, the placement and removal of stored in the cabinet liquids and solids is not hindered by any mechanical elements. In addition, the cabinet according to the invention, in particular safety cabinet, can be opened and closed with one hand, so that the other hand is available for loading or for removal. Here are the main benefits.

It has proven useful if the adjusting device is formed at least in two parts with a pivotable about a pivot angle element and on the door side connected thrust element. The angle element is advantageously designed as a triangular element. Consequently, the angle element or triangular element provides a total of three corner areas. In this case, the connecting element is connected to a corner region of the angle element. On another corner area provides the connection with the push element. The finally remaining corner region advantageously has the pivot point.

The thrust element is usually connected in each case via an outer wing rod and an inner wing rod with the outer wing respectively inner wing of the associated folding door and works on the relevant wing rods on the said folding door. The push element performs the change from the door lock to the door opening and back - like the angle element - a pivoting movement and additionally undergoes a parallel displacement out of the cabinet body. The pivoting movement is determined on the one hand by the angle element and on the other hand by a stationary body-side pivot point. The body-side fulcrum corresponds to the respective folding door and is located inside the associated cabinet body.

For this purpose, the folding door is equipped with a boom, which acts on the stationary body-side pivot point. In most cases, the boom and the pivot point in question are located on the bottom side or on the head side of the cabinet body in order not to limit the usable volume within the cabinet body. Of course, it is also conceivable and is within the scope of the invention to work with both a bottom-side and a head-side boom and associated pivot point. In contrast, the respective adjusting device and with it the connecting element is received predominantly in the head region of the cabinet body. For this purpose, the head area may be equipped with appropriate bearing blocks.

Usually, one bearing block is provided for each folding door and arranged in the head region of the cabinet body. In this case like the respective bearing block, the adjusting device and the two adjusting devices coupling element are arranged in total in a separate head portion of the cabinet body, but this is not mandatory.

The wing bars, d. H. the outer wing rod and the inner wing rod for the associated folding door, are advantageously connected at each end to the thrust element. The respective wing bars go from a nearly parallel course in an angled course to each other when changing from the door closure to the door opening. Of particular importance is still a door closer, which is connected directly or indirectly to the connecting element. The door closer may ensure that the respective folding door is transferred from its open state to the closed position, respectively, or that process (which is usually initiated manually) experiences mechanical support. In addition, the door closer usually ensures that the closing movement of the folding doors is damped.

In the context of the invention now comes the fact of independent importance that at least one element of the door closer is held by means of a triggering device in a biased position. The design can continue to be made so that the door closer provides only after pressing the triggering device for an automatic door closing and otherwise is not used. The element in question may be a connected to the door closer arm, which in turn works directly on the connecting element or is connected to one of the two actuating devices.

In the case of actuation of the triggering device and open folding doors now ensures the biased element or the mentioned locking arm that the door closer on the connecting element, respectively, an actuator acts and this acts in the direction of door closure. Characterized in that the two adjusting devices by the connecting element coupled with each other, this ensures an automatic and uniform closure of both folding doors.

The triggering device may in principle be one which holds the element in the prestressed position, for example by means of an electromagnet, which can be triggered individually or centrally controlled. In most cases, however, as a triggering device, a temperature-varying melting solder is used, which ensures that the element in question leaves its biased position and the voltage energy stored in the element or the energy gained in the door closer is used to the automatic door closing to accomplish.

Figuren 1a und 1b

den erfindungsgemäßen Schrank, perspektivisch (Fig. 1a) und im schematischen Schnitt (Fig. 1b) in geschlossener Stellung und

Figuren 2a und 2b

den zugehörigen Schrank in geöffneter Stellung perspektivisch (Fig. 2a) und in schematischem Schnitt (Fig. 2b).

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:

FIGS. 1a and 1b

the cabinet according to the invention, in perspective ( Fig. 1a ) and in schematic section ( Fig. 1b ) in the closed position and

FIGS. 2a and 2b

the associated cabinet in the open position in perspective ( Fig. 2a ) and in schematic section ( Fig. 2b ).

In the figures, a cabinet is shown, which is present and not restrictive to a folding door security cabinet. This cabinet may be used to hold hazardous substances, liquid and solid chemicals or be designed as a laboratory cabinet. But there are also designs as a tool cabinet conceivable. In any case, security-relevant substances are usually stored in the cabinet in question, which are often explosive, so that in certain cases, an automatic closure must be provided. Even a comfortable operation with only one hand is desirable.

For this purpose, the described cabinet is present and not restrictive designed as a folding door security cabinet and has in its basic structure a merely indicated cabinet body 1 and at least two folding doors 2, 3. The folding doors 2, 3 each have an outer wing 2 and an inner wing 3. In addition, a two folding doors 2, 3 coupling connection element 4 is realized.

The connecting element 4 operates via an associated adjusting device 5, 6, 7, 8 on the connected folding door 2, 3. The adjusting device 5, 6, 7, 8 is in turn at least two parts. It is basically composed of an angle element 5 and a push element 6 connected thereto. The pushing element 6 is on the door side, d. H. in the direction of the folding doors 2, 3, connected to the respective angle element 5.

The push element 6 in turn is connected to the folding doors 2, 3 via respective wing rods 7, 8. In this case, the wing rods 7, 8 each end connected to the thrust element 6. The wing rods 7, 8 are on the one hand an outer wing rod 7 and on the other hand an inner wing rod 8. It can be seen that the outer wing rod 7 is connected to the outer wing 2 of the folding door 2, 3. In contrast, the inner wing rod 8 ensures that adjusting movements of the thrust element 6 are transmitted to the associated inner wing 3 of the folding door 2, 3.

The angle element 5 is executed in the example as a triangular element 5. It therefore has three corner areas 5a, 5b and 5c. At the corner region 5a, the connecting element 4 is connected. The corner region 5b is connected to the push element 6. It is also within the scope of the embodiment in the corner region 5b, one end of the inner wing rod 8 is connected to both the push element 6 and the angle element 5. The remaining corner region 5 c of the angle element or triangular element 5 has a stationary pivot point 9, by which the angle element or triangular element 5 when changing from a door closure according to the FIGS. 1a and 1b to the door opening according to the FIGS. 2a and 2b is pivoted, in the present case in the counterclockwise direction by an angle α of about 60 °. This is of course not restrictive to understand. To start from the FIGS. 2a, 2b with the folding doors 2, 3 in the open position the door lock according to the Fig. 1a and 1b Consequently, the angle element or triangular element 5 must be pivoted in the clockwise direction around the pivot point 9 in question, taking into account in turn the angle α.

Also, the pusher 6 performs when changing from the door closing to the door opening and back a pivoting movement. This pivoting movement of the thrust element 6 is predetermined on the one hand by its connection with the angle element 5 in the corner region 5b and on the other hand by a fixed body-side pivot point 10. This pivot point 10 is located in the interior of the cabinet body 1. The respective folding door 2, 3 is connected via a boom 11 with the pivot point 10 in question.

When changing from the door lock to the FIGS. 1a, 1b to the door opening according to the FIGS. 2a, 2b performs the thrust element 6 a pivoting movement by an angle β of about 15 ° clockwise. Of particular importance is the additional fact that the thrust element 6 undergoes a parallel displacement compared to an associated bearing block 12 at the same time, and as it were out of the cabinet body 1 out. In fact, the bearing block 12 is primarily for storage of the entire adjusting device 5, 6, 7, 8, wherein in the embodiment of the bearing block 12 the Defined pivot point 9 and additionally has a stop 14, which limits the rotational movement of the right adjusting device 5, 6, 7, 8 and consequently both folding doors 2, 3rd

In particular, the schematic sectional views of the Figures 1b and 2 B make it clear that the connecting element 4 when changing from the door closing to the door opening and back substantially performs a linear movement along its longitudinal direction and additionally undergoes a slight parallel offset. Overall, the connecting element 4 is arranged at an angle in comparison to a door closing plane T spanned by the folding doors 2, 3. In the present case, the angle γ in question of the skew is in the range of approximately 20 to 30 °.

The change from the door closure to the door opening is now accomplished according to the invention that the two adjusting devices 5, 6, 7, 8 in their parallelogram-like position after the FIGS. 1a, 1b provide for the relevant door closure and in their triangular position after the FIGS. 2a, 2b cause a door opening. This is achieved in detail in such a way that the respective wing rods 7, 8 connected at the end to the associated push element 6 have a nearly parallel course in the position corresponding to the door closing. However, if the thrust element 6 is slightly pivoted to the door opening by the angle β and at the same time moved in the direction of the folding doors 2, 3 relative to the associated bearing block 12, as it were parallel, leave the respective wing rods 7, 8 their nearly parallel course according to the FIGS. 1a, 1b , Because they go in an angular course according to the representation of the FIGS. 2a, 2b over.

As a result, the two wings 2, 3 of the respective hinged door 2, 3 cascade parallel and juxtaposed in its open position positioned. As a result, a maximum access area provided by the folding doors 2, 3 to the interior of the cabinet body 1 is available, which facilitates the removal and assembly of, for example, safety-relevant materials.

In the exemplary embodiment, the right-hand folding door 2, 3 is still associated with a door closer 15, 16. This door closer 15, 16 is connected directly or indirectly to the connecting element 4. In principle, the door closer 15, 16 in question can also work on one of the two adjusting devices 5, 6, 7, 8, for example the angle element 5. In the present case, the door closer 15, 16 is designed in two parts and has a pretensioned element 15 and a triggering device 16 the trigger 16, the element 15 is held in its biased position. After actuation of the triggering device 16, the element 15 ensures that the two (opened) folding doors 2, 3 are automatically closed.

The element 15 may be a scroll spring, which is held in the longitudinally extended tensioned position by means of the triggering device 16. If the triggering device 16 is actuated, then the element 15 relaxes or rolls together and ensures that the associated setting device 5, 6, 7, 8 and with it the connected folding door 2, 3 occupy the closed position automatically.

Because the adjusting device 5, 6, 7, 8 is connected via the connecting element or the connecting lever 4 realized at this point to the other adjusting device 5, 6, 7, 8 for the other folding door 2, 3, this folding door 2, 3 in phase and automatically closed. The triggering device 16 in the present case is a fixing element, the two metal plates of which hold the element 15 or the scroll spring in their pretensioned position with the aid of a molten solder which becomes liquid at an elevated temperature. Will the exceeded 50 ° C, for example, the fusible solder goes into its liquid state and takes the spring or the element 15 its or its relaxed position. In this case, the adjusting device 5, 6, 7, 8 taken, if the associated folding door 2, 3 is in the open position. This applies because of the coupling of the two folding doors 2, 3 for both folding doors 2, 3 taken together.

It is understood and it is clear that the door closer 15, 16 is active only in exceptional cases, namely, when the critical temperature of 50 C has been exceeded or the triggering device 16 has experienced an operation to release the element or the scroll spring. Normally, however, the folding doors 2, 3 are operated purely manually, usually with only one hand. That is, the folding doors 2, 3 are both manually opened and closed. The door closer 15, 16 is on the other hand functionally decoupled from the adjusting devices 5, 6, 7, 8 and consequently also the folding doors 2, 3. He comes in the context of the embodiment only used when due to the elevated temperature, the element or the scroll spring 15 with the help of the triggering device 16 can not be kept in a biased position and thus relaxed. If, in this situation, the two folding doors 2, 3 are in their open position, they are automatically closed altogether with the aid of the element or the door closer 15, 16.

In this way, in the event of a fire, the valuable substances and chemicals stored in the associated cabinet are protected against direct fire and possibly an explosion. Of course, the triggering device 16 can also otherwise ensure that the prestressed element 15 unfolds its effect for the automatic door closure. It is conceivable here to work with an electromagnetically actuated release device 16, which receives its signal from a central office, for example.

Claims (10)

Cabinet, in particular folding-door safety cabinet, with at least two folding doors (2, 3) each with outer wings (2) and inner wings (3), and with a connecting element (4) coupling the two folding doors (2, 3) which in each case has an adjusting device ( 5, 6, 7, 8) on the associated folding door (2, 3) operates, characterized in that the two adjusting devices (5, 6, 7, 8) in parallelogrammartiger position for a door closure and in a triangular-like position provide for a door opening. A cabinet according to claim 1, characterized in that the adjusting device (5, 6, 7, 8) is formed at least in two parts with pivotable about a pivot point (9) angle element (5) and the door side connected thrust element (6). Cabinet according to claim 2, characterized in that the thrust element (6) via an outer wing rod (7) and an inner wing rod (8) on the outer wing (2) and inner wing (3) of the associated folding door (2, 3) works. Cabinet according to claim 2 or 3, characterized in that the thrust element (6) by the angle element (5) on the one hand and a fixed body side pivot point (10) on the other hand predetermined pivoting movement and additionally performs a parallel displacement. Cabinet according to one of claims 2 to 4, characterized in that the respective ends of the thrust element (6) connected wing rods (7, 8) when changing from the door closure to the door opening of a nearly parallel course in an angled course to each other. Cabinet according to one of claims 2 to 5, characterized in that the angle element (5) is designed as a triangular element (5), at the corner regions (5a, 5b, 5c) on the one hand the connecting element (4) and on the other hand, the thrust element (6) connected are while the remaining corner region (5c) has the pivot point (9). Cabinet according to one of claims 1 to 6, characterized in that the connecting element (4) performs the change from the door closure to the door opening and back substantially a linear movement with possibly parallel offset. Cabinet according to one of claims 2 to 7, characterized in that the connecting element (4) is arranged at an angle in comparison to a door closing plane (T). Cabinet according to one of claims 1 to 8, characterized in that a door closer (15, 16) is connected directly or indirectly to the connecting element (4). Cabinet according to claim 9, characterized in that at least one element (15) of the door closer (15, 16) by means of a triggering device (16) is held in a biased position and after actuation of the triggering device (16) provides for an automatic door closure.

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