EP1205623A2 - Safety cabinet - Google Patents

Abstract

The first folding door (26) is joined to a lever that can be (in)directly rotated by the action of a door closing fixture. The lever is joined at one end to an axle shaft rotatably mounted inside the fixture or a cabinet wall (16), or to a part protruding from this shaft. The opposite end of the lever is joined to the second folding door (28).

Description

The invention relates generally to a safety cabinet with at least one regardless of their position self-closing folding door comprising at least two articulated connected folding wings, of which a (first) folding wing preferably in the range of one Side wall of the safety cabinet can be swiveled around a vertical axis is mounted and preferably along along between the articulated with each other connected folding wings forming a cover element covering this extends.

Known safety cabinets with folding doors, whose door movement via a linear guide the top edge of the door is controlled. Due to the through guide rail and The elaborate mechanics required for linear guidance are corresponding Cupboards expensive. In addition, there is the disadvantage that the usual thick-walled door gives only a small clear opening of the cabinet, especially when the door segments or folding wings are not fully on top of each other.

Doors of safety cabinets can be kept open by a locking device a trigger mechanism releases the door in the event of a fire, in order to then use a Locking mechanism to close the door.

In a further construction of a cabinet with a folding door, fittings are used for which the edge opposite the hinge side by means of a steering lever on a Circle segment is guided. The doors correspond to the construction of customary furniture doors Twist the entire construction. This creates the impression of a unreliable door suspension especially when the mechanism is designed that the steering lever on the door is not with a pivot, but with a plastic guide is smoothly realized.

A safety cabinet with self-closing folding doors can be found in DE 29 45 547 A1. The gap that forms between the folding wings when the door is opened is by means of a Covered, the non-positively or positively applied to at least one of the folding wings is trained. For this purpose, the cover can be form-fitting by a folding wing outgoing guide element are guided. A related construction is complex and also harbors the danger that when opening or closing the folding door Operator can injure because the panel protrudes from the outer surface of the folding door.

A protective cover for a door is known from US 5,778,601. One is curved cover with an edge attached to a door frame, whereas the other edge is contained in a slotted slot, that of one Door wing runs out.

DE 15 29 652 C2 relates to a foldable around a horizontal axis Cupboard door, in which a door part is connected via a handlebar, which in turn is hinged assumes that a spring element can be rotated in such a way that the folding door is in the open position overcomes a dead center position in which an automatic closing of the door is impossible.

A folding door for a television receiver according to DE-AS 11 14 292 comprises several Door parts that are hinged together, with the exception of that on the door frame attached door part the rest connected with swivel levers to guide enable.

In the case of a folding door for a cabinet according to GB 908 598, on the one hand there is a lever and on the other hand, a spring element is provided, so that when an open door leaf over its dead center position is pivoted out, the door is held in the open position.

In general, doors are also front doors with oil-hydraulically damped door closers known, the closing force of the door closer is built up via a compression spring, the is tensioned by opening the door. Thus, the greatest tension of the spring is when it is open Given the door. As the closing movement increases, the force decreases so that when it is reached of the closed state, the force is zero or almost zero. This is the reason Disadvantage given that the compression spring is not the required only when the door is slightly open Traction creates that small openings can be closed.

Closer with slide rail linkage for doors or windows are from DE 40 38 720 C2 or DE 19 822 498 A1 known.

The present invention is based on the problem of a security cabinet at the beginning to further develop the described type in such a way that safe, constructive measures are taken Closing the folding door is possible.

According to the invention, the problem is essentially solved in that one of the folding wings the folding door is connected to a lever arm that indirectly or directly via one Door closer is rotatable, one end of the lever arm of one Axle shaft is interspersed, which is rotatable in the door closer or with a wall of the Security cabinet or an element emanating from it is stored, and other End of the lever is connected to the (second) folding wing, which is indirect or direct is hingedly connected to the (first) folding wing, which is hinged to the safety cabinet. In particular, the lever with the second folding wing is in the area of its free to the first folding door connected to the distant longitudinal edge area.

The lever, which is designed as a one-arm lever, is either directly itself by the The door closer is set in rotation or can be started from the door closer Carriers are taken away. Through these measures, that of the door closer caused closing force transferred to the folding door, the driver or the Lever arm in particular via pinion and rack with a compression spring of the door closer connected is.

To generate sufficient closing force even when the door is almost closed is to be emphasized a self-discovery advanced training that also one of the Folding wing is connected to a spring element that with maximum preload fully opened folding door acts on it. The spring element can be a pull-like Coil spring, the longitudinal axis of which is vertical or nearly when the door is fully open runs perpendicular to the plane spanned by the closed folding door. The longitudinal axis of the When the door is closed, the spring element then runs parallel or essentially parallel the lever arm.

Through the additional connection of the folding door with a spring element such as a tension or coil spring, which is hinged at one end to a folding wing, in particular the folding wing, which is stored in the safety cabinet, and with its other end at the opposite Wall of the safety cabinet, especially in the immediate vicinity of the door closer is set, the steadily decreasing force of the door closer is determined by the Tension spring compensated, the spring element being arranged so that its force at increasing closing path becomes stronger, so that the folding door closes securely low open position is guaranteed.

In a further development of the invention it is provided that the lever arm when fully open The folding door can be fixed and locked in place. This can be done from an inner side wall of the safety cabinet or a holding element such as a claw from an inner surface of one of the folding wings go out, which keeps the door open, as long as it is not closed manually or by an im Fire thermal release device is released.

Further details, advantages and features of the invention result not only from the Claims, the features to be extracted from these - individually and / or in combination -, but also from the following description of the drawing preferred embodiments.

Fig. 1

eine Vorderansicht eines Sicherheitsschrankes,

Fig. 2

eine Prinzipdarstellung des Sicherheitsschrankes gemäß Fig. 1 in Draufsicht mit unterschiedlichen Falttürpositionen,

Fig. 3

einen Schnitt durch den Sicherheitsschrank gemäß Fig. 1,

Fig. 4

ein Detail des Sicherheitsschrankes gemäß Fig. 1,

Fig. 5

einen Schnitt durch eine weitere Ausführungsform eines Sicherheitsschrankes,

Fig. 6

einen Längsschnitt des Sicherheitsschrankes gemäß Fig. 7 im Ausschnitt und

Fig. 7

eine Prinzipdarstellung eines Türschließers mit von diesem ausgehendem Hebel.

Show it:

Fig. 1

a front view of a safety cabinet,

Fig. 2

2 shows a basic illustration of the safety cabinet according to FIG. 1 in plan view with different folding door positions,

Fig. 3

2 shows a section through the safety cabinet according to FIG. 1,

Fig. 4

2 shows a detail of the safety cabinet according to FIG. 1,

Fig. 5

2 shows a section through a further embodiment of a safety cabinet,

Fig. 6

a longitudinal section of the safety cabinet according to FIG. 7 in the detail and

Fig. 7

a schematic diagram of a door closer with this starting lever.

In the figures, in which basically the same elements are provided with the same reference symbols are preferred configurations of a safety cabinet 10 are shown, the DIN 12925 should correspond.

In Fig. 1, the safety cabinet 10 is shown in front view. This includes Side walls 12, 14, top wall 16, bottom wall 18 and back wall 19. Die Front front can be closed by two folding doors 20, 22, each made of door leaves or Folding wings 24, 26, 28, 30 exist. The outer folding wings 24, 30 are in the area of Side walls 12, 14 are pivotally mounted and articulated about a vertical axis connected to the inner folding wings 26, 28. Which is articulated between them connected folding wings 24, 26 and 28, 30 forming gap 32, 34 is each one Cover element 36, 38 closed.

To close, regardless of the folding door position, i.e. an automatic one To enable the folding doors 20, 22 to be closed, be it in the event of a fire due to automatic Triggering, whether by manual intervention, a steering lever guide is provided, wherein each a one-armed steering lever - hereinafter referred to as lever 40, 42 - one of each Folding doors 20, 22 is assigned. The respective lever 40, 42 is either indirect or directly from a door closer 43, 45. This is in FIG. 3 in relation to the folding door 20 shown. The lever 40, 42 goes from the inner free longitudinal or corner edge region 46, 48 of the inner folding wing 26, 28, which is articulated to the outer folding wing 24, 30 is.

Furthermore, a tension spring 50, 52 is provided, each of which is one of the folding doors 20, 22 is assigned, the tension spring 50, 52 in the articulation area between the folding wings 24, 26, 28, 30 engages on the respective folding door 20, 22. It is particularly provided that the respective tension spring 50, 52 extends from the respective outer folding leaf 24, 30, and from its longitudinal edge area 54, which is close to the inner folding wing 26, 28.

The tension spring 50, 52 goes in the exemplary embodiment - like the door closer 43, 45 - from the Rear wall 19 of the safety cabinet 10. The tension spring 52 runs completely opened door 20, 22 parallel or substantially parallel to the side wall 12, 14, that is perpendicular or substantially perpendicular to the closed folding door 20, 22 spanned level. In the closed state, the tension spring 50, 52 runs parallel to the Levers 40, 42, as shown in FIG. 4. These measures ensure that the Folding doors 20, 22 do not show an accordion effect, i.e. folding leaves 24, 26 and 28, 30, respectively with the folding doors 20, 22 running in a common plane. This is the respective spring element 50, 52 provided, the function with reference to FIG. 6 and thus the spring element 52 is explained.

When the folding door 22 is fully open, the spring element 52 assumes position A, whereas position B is reached when the folding door 22 is closed. In position A it is Spring element 52 fully tensioned and can have a tensile force of 28 N, for example. In position B, the spring element 52 is more relaxed and can, for example, apply a force of 11 N show. The spring element 52 now supports the closing movement such that in the position A no closing force acts because the spring element 52 with its longitudinal axis in the Plane runs in which the folding wings 28, 30 lie one on top of the other in the open state or run parallel to each other. Regardless of this, the spring element 52 is in position A. a maximum preload. If the closing movement is initiated, the closing force stronger, since that between the longitudinal axis of the spring element 52 and that of the closed Folding wing 22 spanned plane included angles á of initially 90 ° (cosine 90 ° = 0) in position A to approx. 66 ° (cosine 66 ° = 0.4) in position B, i.e. with closed Folding door 22 decreases. The effective spring force in position B thus increases from 0 x 28 N = 0 to 0.4 x 11 N = 4.4 N. At the same time, a force of cosine (90 ° - 66 °) x 11 N = 0.9 x acts 11 N ≈ 10 N at right angles to the closed door 22 in the direction of the interior of the cabinet ensures that the accordion effect mentioned above does not occur.

Due to these measures, the declining tensile force of the Door closer 45 with the result that the folding door 22 closes completely even when it is opened with a small opening angle.

The door closer 43, 45 is of such a conventional construction, whereby however, the lever 40, 42 is formed with one arm. Regardless of this, the door closer includes 43, 45 a cylinder 58 in which a piston 60 is axially displaceable, the cylinder 58 in Sub-chambers 62, 64 divided. A rack 66 also passes from the piston 60 Piston rod, which has a pinion 68 rotating bearing 70 with the lever 40, 42 or a driver 72 according to FIGS. 5 and 6, which in turn on the Lever 40, 42 acts to pivot this.

The piston rod or rack 66 is inside the cylinder 58 from a spring element 74 surrounded, which is then tensioned when the lever 40, 42 when opening the folding door 20, 22nd is pivoted. Furthermore, the chambers 62, 64 are filled with oil and through the outlets 76, 78 connected to each other. In other words, the door closers 43, 55 have a conventional one Construction on.

3 illustrates, the folding wing 20, 22 on the lever 40, 42 on one Circular arc with a radius R, the distances between the door closer side Pivot point 80 of the lever 40, 42 and articulation point 82 on the inner folding wing 26, 28 corresponds.

5 and 6 that when the lever 40, 42 is not directly from the door closer 43, 44 is rotated, from the door closer 43, 45 the driver 42 extends, which is articulated to the lever 40, 42. The lever 40, 42 can then in the area of Head wall 76 of the safety cabinet 10 can be mounted, as shown in the sectional view Fig. 8 illustrates.

The safety cabinet 10 according to the invention is consequently characterized by a lever-guided mechanism Folding doors 20, 22, wherein the decrease in the closing force of the door closers 43, 45 through suitable and correctly positioned tension springs 50, 52 is at least partially compensated.

The folding doors 20, 22 do not protrude at any time during the opening or closing movement substantially beyond the contour of the cabinet 10, so that the cabinet 10 for example in a deep niche or in a corner of a room.

The respective steering lever 40, 42 for controlling the folding door movement is at the same time one-armed Closing arm of a hydraulically damped closing element in the form of a door closer 43, 45, wherein one end of the closing arm 40, 42 forms the fulcrum 30, while the the other end on the hinged half of the folding door 20, 22, that is to say on the inner folding leaf 26, 28 is articulated. The articulation point 82 executes a circular arc movement.

Furthermore, the lever 40, 42 can be used as a locking lever for the respective folding door 20, 22 in the open position Serve position, so form part of a well-known door locking system.

The suspension and design of the folding mechanism of the folding wings 24, 26 and 28, 30 takes place in such a rigid construction that a play-free, solid door control and movement is ensured. This can be done, for example, by means of correspondingly precise pintle belts in Connection with continuous bar hinges using a sufficient rigid construction of the door core can be achieved. The bending stiffness of the door core can either by gluing sandwich elements or - in the case of a monolithic structure Choice of material can be realized with a correspondingly high flexural modulus.

Claims (9)

Security cabinet (10) with at least one folding door (20, 22) that is basically self-closing regardless of its position, comprising at least two articulated folding wings (24, 26; 28, 30), one of which (first) folding wing (24, 30) preferably in the area is pivotally mounted about a vertical axis from a side wall (12, 14) of the safety cabinet, and preferably a cover element (84, 86) covering this runs along a gap (32, 34) formed between the hingedly connected folding wings,
characterized in that one of the folding wings (26, 28) of the folding door (20, 22) is connected to a lever (40, 42) which can be rotated indirectly or directly via a door closer (43, 45), one end of the lever is connected to an axle shaft which is rotatably mounted in the door closer or a wall (19) of the safety cabinet or an element emanating therefrom, and the other end of the lever is connected to the (second) folding leaf (26, 28) which is directly or indirectly articulated to the (first) folding wing (24, 30) which is articulated on the safety cabinet (10). Safety cabinet according to claim 1,
characterized in that one of the folding wings (24, 30) is connected to a spring element (50, 52), which preferably acts on the latter with a maximum preload when the folding door (20, 22) is fully open. Safety cabinet according to at least claim 2,
characterized in that the spring element (50, 52) is a tension and coil spring, the longitudinal axis of which when the folding door (20, 22) is fully open is perpendicular or substantially perpendicular to the plane spanned by the closed folding door and / or the longitudinal axis is parallel when the folding door is closed or runs essentially parallel to the lever (40, 42) and / or its longitudinal axis runs parallel or substantially parallel to the lever (40, 42) when the folding door is closed. Safety cabinet according to at least one of the preceding claims,
characterized in that the lever (40, 42) and the spring element (50, 52) are assigned to one another and matched to one another in such a way that when the closing force of the door closer (43, 45) transmitted via the lever decreases, the spring element compensates at least partially decreasing closing force takes place. Safety cabinet according to at least one of the preceding claims,
characterized in that the lever (40, 42) can be locked and locked when the door (20, 22) is fully open. Safety cabinet according to claim 1,
characterized in that the second folding leaf (26, 28) is connected in the region of its free longitudinal edge region remote from the first folding leaf (24, 30) to the lever (42, 44), which is designed in particular with one arm. Safety cabinet according to at least claim 1,
characterized in that the door closer (43, 45) extends from a rotatable driver (72) which engages with the lever (42, 44) in such a way that the closing force can be transmitted during the closing movement. Safety cabinet according to at least one of the preceding claims,
characterized in that the door closer (43, 44) comprises a cylinder (58) with an adjustable piston (60) with a piston rod (66) which, at least in sections, is designed as a toothed rack on the outside of the cylinder, which meshes with a pinion (78) that the lever (42, 44) or the driver (72) is pivotable. Security cabinet (10) with at least one folding door (20, 22) that is basically self-closing regardless of its position, comprising at least two articulated folding wings (24, 26; 28, 30), one of which (first) folding wing (24, 30) preferably in the area is pivotally mounted about a vertical axis from a side wall (12, 14) of the safety cabinet, and preferably a cover element (84, 86) covering this runs along a gap (32, 34) formed between the hingedly connected folding wings,
characterized in that one of the folding wings (26, 28) of the folding door (20, 22) is connected to a lever (40, 42) which can be rotated indirectly or directly via a door closer (43, 45), one end of the lever is connected to an axle shaft which is rotatably mounted in the door closer or a wall (16) of the safety cabinet or an element emanating therefrom, and the other end of the lever is connected to the (second) folding leaf (26, 28) which is connected directly or indirectly to the (first) folding wing (24, 30), which is hinged to the safety cabinet (10), that one of the folding wings is connected to a spring element (50, 52) and that the lever (40, 42 ) and the spring element (50, 52) are assigned to one another and coordinated with one another in such a way that when the closing force of the door closer (43, 45) is reduced by the lever, the spring element compensates at least partially closing force.

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