EP0114041B1 - Door - Google Patents

Abstract

1. Door, especially up-and-over articulated door (1), with door panels which are arranged one above the other and are connected pivotably to one another, with a counterforce which balances out the weight of the door and which counteracts the closing of the door, and acts on a counter weight shaft (4) which is connected to the door and on which a anti-fall device (9) is arranged which consists of a ratchet wheel (12) arranged on the counterweight shaft (4) to be fast in rotation therewith and having radially open spaces (15), formed by supporting surfaces (14), for detent elements (16) mounted therein, and which comprises a stationary housing (11) motionless relatively to the counterweight shaft (4), the inner side of said housing covering the ratchet wheel (12) at a spacing which is smaller than the radial diameter of each detent element (16), and said housing comprising abutments for the detent elements (16), characterized in that a) the abutments are constructed as recesses (23) in the form of quater-sphere sections, b) on the inner side of the housing (11) there are arranged grooves (21) which are open towards the inner surface (20) of the housing (11) and in the rear wall (22) of which the forwardly and radially open quarter-sphere recesses (23) are formed, c) a counterhousing (18) is provided which is connected to the counterforce (5) and which is freely rotatable on the counterweight shaft (4), d) on the inner surface (19) of the counterhousing (18) projections (24) are provided, with radially inwardly open quater-sphere-shaped recesses (25) for the detent elements (16), theses engaging in the grooves (21) of the housing (11) and having a shorter length (1) as viewed in the circumferential direction than the grooves (21), and e) the arrangement of the recesses (23, 25) in the grooves and in the projections (24) is such that when the counterhousing (18) rotates relatively to the housing (11) the quarter-sphere recesses (23, 25) can form a hemispherical recess, the circumference of the ratchet wheel (12) from the lowest part of the hemispherical recesses (23, 25) to the entry of the detent elements (16) in the event of the locking of the counterweight shaft (4) having a distance which is smaller than the diameter of the detent elements (16).

Description

The invention relates to a gate, esp. A sectional ceiling gate, according to the preamble of the main claim.

FR-A-24 65056 describes a sectional ceiling door of the aforementioned type which is equipped with a fall protection device, the fall protection device being operated by centrifugal force. Such a device is intended to prevent the gate from falling in the event of a break in the winding shaft or the elevator shaft, thereby causing damage to material and endangering people. The fall protection is arranged on a counterweight shaft, which is common for large gates and which to absorb a counterforce, for. B. counterweight, torsion springs, leaf springs or the like. Is determined. The counterweight shaft has the task of ensuring that the door can also be operated by human hands despite its heavy weight and that when the door is lowered, the increasing door weight is automatically balanced by the counterforce. Centrifugal force fall protections have the disadvantage in this device that the fall protection engages when the gates are operated by hand when the predetermined rotational speed of the shaft is slightly exceeded, so that the gate is no longer manageable. It is therefore not possible to open or close these gates particularly quickly, for example in the event of danger.

Centrifugal fall protection for roller shutters or the like, in which the stops arranged on the inside of the housing are formed as recesses for receiving the locking bodies, are also known from DE-C-24 41 522 and DE-UM-81 35 654. These two known devices also work exclusively dependent on centrifugal force.

Finally, from DE-C-620 566 a centrifugal force-independent fall protection for sliding windows is known, in which the control force acting on the fall protection is the counterforce that balances the window. This known device is not suitable for very heavy gates, since a considerable structural effort is required in the side guides of the known side guides of the known sliding windows in order to absorb the pressures that occur when the fall protection device is activated.

The invention is based, a centrifugal fall protection for gates, d. H. So to create heavy vertically movable components that can be easily attached to the counterweight shaft and therefore does not require any serious structural changes to the building.

Starting from the generic device, this object on which the invention is based is achieved by the features of the characterizing part of the main claim.

The fall protection according to the invention is controlled by the counterforce balancing the door weight, so it is independent of the opening and closing speed of the door, although the fall protection is still housed in a housing that can be retrofitted, so that interventions in the structure through the door od. Like. Is closed, are not required.

Advantageous embodiments of the arrangement according to the invention are covered in the subclaims.

• Figur 1 schaubildlich ein Deckengliedertor mit als Torsionsfedern ausgebildeter Gegenkraft,
• Figur 2 einen Vertikalschnitt durch eine Absturzsicherung,
• Figur 3 in einem größeren Maßstab eine Ansicht auf die Stellung der auf der Innenseite des Gehäuses angeordneten Ausnehmungen in der Blockierstellung,
• Figur 4 eine Fig. 3 entsprechende Ansicht auf die Ausnehmungen an der Innenseite des Gehäuses in der Freigabestellung,
• Figur 5 eine Schnittdarstellung entsprechend Fig. 2 aber in der Blockierstellung der Einrichtung entsprechend der Linie 2-2 in Fig. 6,
• Figur 6 einen Schnitt gemäß der Linie 6-6 in Fig. 2 und
• Figur 7 eine auseinandergezogene Darstellung der einzelnen Bauteile der Absturzsicherung.

An embodiment of the invention is explained below with reference to the drawings. In the drawings shows

• FIG. 1 shows a sectional sectional door with a counterforce designed as torsion springs,
• FIG. 2 shows a vertical section through a fall protection device,
• FIG. 3 shows, on a larger scale, the position of the recesses arranged on the inside of the housing in the blocking position,
• FIG. 4 shows a view corresponding to FIG. 3 of the recesses on the inside of the housing in the release position,
• 5 shows a sectional view corresponding to FIG. 2 but in the blocking position of the device according to line 2-2 in FIG. 6,
• 6 shows a section along the line 6-6 in Fig. 2 and
• Figure 7 is an exploded view of the individual components of the fall protection.

In Fig. 1, 1 denotes a large gate, which is designed as a sectional ceiling gate. In the exemplary embodiment shown in FIG. 1, the gate runs in corresponding guide rails 2 and 3 and is moved up and down by hand or by means of a motor drive (not shown in the drawing). To balance the gate weight, a counterweight shaft 4 is provided, on which two torsion springs 5 and 6 are arranged. The counterweight shaft, which is also the rotary shaft of the door, is connected to the door in the exemplary embodiment shown in FIG. 1 via cables 7 and 8, so that when the door moves from the closed position shown in FIG. 1 into the not shown Open position, the torsion springs are relaxed and the torsion springs are tensioned when the door moves from the open position that opens the opening to the closed position shown in FIG. 1, thereby balancing the weight of the door 1. Instead of the torsion springs 5 and 6 shown, counterweights or leaf springs can of course also be provided. The fall protection device to be described below is indicated purely schematically at 9, it being understood that two such fall protection devices 9 - assigned to each torsion spring 5 or 6 - can of course be provided.

The structure of the fall protection 9 goes its details are clearer from FIGS. 6 and 7. With 10, a mounting plate is designated, which carries a housing 11 fixed in the assembled state of the fall protection 9. A ratchet wheel 12 is arranged in this housing and is equipped with spaces 15 forming open support surfaces 14 in the radial direction, ratchet bodies 16 being mounted in these spaces. Each of these rooms 15 can be assigned its own locking body 16. The ratchet wheel 12 is rotatably connected to the counterweight shaft 4, for example in that the counterweight shaft is polygonal and the ratchet wheel 12 has a correspondingly adapted polygonal receiving opening 17 for the counterweight shaft.

18 with a counter housing is designated, which is arranged freely rotatable on the counterweight shaft 4. While the ratchet wheel 12 is arranged in a correspondingly shaped receiving space inside the housing 11, the counter housing 18 closes this receiving space from the outside and, with its surface 19 recognizable in FIG. 7, lies against the surface 20 of the housing 11.

Incisions 21 are provided in the housing 11, which are elongated and whose space thus formed lies above the circumference of the ratchet wheel 12, with recesses 23 being provided in these incisions 21 in the respective rear wall, which are quarter-spherical in shape, as is most evident 3 and 4 can be seen. In the exemplary embodiment shown, five incisions 21 are provided, and the recess 23 is formed in each of these incisions 21 on the respectively assigned rear wall 22.

The counter housing 18 has projections 24 corresponding to the shape of the incisions 21, the length I of which, however, is less than the length of the incisions 21, so that these projections 24 correspond to the length difference. Can perform movement within the incisions 21, which can be clearly seen when comparing FIGS. 2 and 5.

The projections 24 also have recesses 25 on their radial inside, which are designed in the shape of a quarter sphere and thus correspond to the cutouts 23 of the housing 11. The height h of the projections 24 corresponds to the depth t of the incisions 21.

The housing 11, the ratchet wheel 12 and the counter housing 18 are fixed via a hood-shaped end ring 26, for example via the connecting screws 27 shown in FIG. 6, while the housing 11 is connected to the fastening plate 10 via the connecting screws 28 shown in FIGS. 6 and 7 is set.

The recesses 23 and 25 are chamfered in the running direction so that the locking bodies 16 are made easier to lead out.

The further required ball bearings, mounting rings etc. are shown in the drawing, but do not need to be explained below.

The housing 11 also has a groove 29 which extends in the circumferential direction and into which a nose 30 arranged on the counter housing 18 engages, which protrudes beyond the surface 19 and creates a contact edge 31 against which a return spring 32 comes to rest the other end is supported on the end wall of the groove 29. This position can be clearly seen from FIG. 5, in which the lug 30 bears against the end of the groove 29 opposite the abutting end of the return spring 32 and is guided into this position by the return spring 32.

The locking body 16 are formed as balls in the illustrated embodiment.

The width of the raceway formed within the housing 11 for the locking body 16 corresponds approximately to the diameter of the locking body 16 and the depth t of the incisions 21 and the height h of the projections 24 each correspond to approximately half the width of the raceway formed and thus approximately half the diameter of the locking body 16.

In Fig. 6 one end of the torsion spring creating the counterforce is shown at 5 and it can be seen that this end is connected to the counter housing 18, so that the torsional force caused by the torsion spring acts on the counter housing 18 and strives to counter the counter housing 18 always lead to an end position in which the nose 30 has overcome the restoring force of the spring 32, d. H. to lead into a position, as can be seen in Fig. 2. Here, the return spring 32 is compressed and the rotatable counter housing 18 has rotated relative to the fixed housing 11 by a certain angle, which corresponds to the size of the free space which results from the length difference between the projections 24 and the incisions 21.

• In der Normalstellung bewirkt - wie vorstehend bereits ausgeführt - die Torsionsfeder 5 eine Drehbewegung des Gegengehäuses 18 derart, daß die Rückstellfeder 32 komprimiert wird und die Vorsprünge 24 mit ihrer Stirnkante 34 zur Anlage an der Stirnkante 35 der ihnen jeweils zugeordneten Einschnitte 21 gelangen. Diese Stellung ist in einem größeren Maßstab in Fig. 4 dargestellt und es ist erkennbar, daß hierdurch die jeweils viertelkugelförmigen Ausnehmungen 25 des Gegengehäuses 18 und 23 des Gehäuses 11 so gegeneinander verschoben sind, daß sie keine gemeinsame Öffnung bilden, wodurch die Möglichkeit gegeben wird, daß die Sperrkörper diese Ausnehmungen 23 und 25 problemlos überlaufen können. Die als Wendelfeder ausgebildete Rückstellfeder 32 ist wie Fig. 2 zeigt komprimiert. Tritt ein Wegfall der durch die Torsionsfeder 5 geschaffenen Gegenkraft ein, kann nunmehr die Rückstellfeder 32 wirksam werden und führt die von ihr beaufschlagte Nase 30 des Gegengehäuses 18, so wie dies in Fig. 5 dargestellt ist, zur Anlage an der Stirnwand 36 der Nut 29 und bewegt dadurch das Gegengehäuse 18 in die in Fig. 5 dargestellte Stellung, bei welcher nunmehr, wie dies Fig. 3 verdeutlicht, die viertelkugelförmigen Ausnehmungen 23 und 25 in eine koinzidierende, d. h. fluchtende Stellung gelangen, so daß-sie in ihrer Zusammenwirkung eine halbkugelförmige Ausnehmung schaffen, in die nunmehr ein Sperrkörper einrasten kann, so wie dies in Fig. 5 dargestellt ist.

The fall arrester works as follows;

• In the normal position - as already stated above - the torsion spring 5 causes a rotation of the counter housing 18 in such a way that the return spring 32 is compressed and the projections 24 with their end edge 34 come to rest against the end edge 35 of the cuts 21 assigned to them. This position is shown on a larger scale in Fig. 4 and it can be seen that hereby the respective quarter-spherical recesses 25 of the counter housing 18 and 23 of the housing 11 are displaced relative to one another such that they do not form a common opening, which gives the possibility of that the locking body can easily overflow these recesses 23 and 25. The return spring 32 designed as a helical spring is compressed as shown in FIG. 2. If the counterforce created by the torsion spring 5 ceases to exist, the return spring 32 can now take effect and guides the nose 30 of the counter housing 18 which it acts upon, as shown in FIG. 5 is shown, for abutment on the end wall 36 of the groove 29 and thereby moves the counter housing 18 into the position shown in Fig. 5, in which, as shown in Fig. 3, the quarter-spherical recesses 23 and 25 in a coinciding, ie aligned Position, so that - in their interaction they create a hemispherical recess into which a locking body can now snap, as shown in Fig. 5.

Since the inside of the housing 11, i.e. H. So essentially the track for the locking body 16, the ratchet wheel 12 covers a distance which is smaller than the radial diameter of each locking body 16, the blocking wheel 12 can be seen in FIG. 5 from the fixed housing 11, and since the Counterweight shaft 4 is rotatably connected to the ratchet wheel 12, the shaft is also blocked, so that a crash of the gate is avoided.

By simply moving the gate back, this blocking can be removed again and by acting on the counter housing 18 in the sense of the torsion spring 5 which is otherwise present, the gate can be easily guided into one or the other end position and the broken torsion spring 5 can now be repaired.

From the foregoing description it can be seen that the use of a torsion spring 5 is not mandatory for the mode of operation of the fall protection 9, but any counterforce can act here which balances the door weight.

Claims (6)

1. Door, especially up-and-over articulated door (1), with door panels which are arranged one above the other and are connected pivotably to one another, with a counterforce which balances out the weight of the door and which counteracts the closing of the door, and acts on a counterweight shaft (4) which is connected to the door and on which an anti-fall device (9) is arranged which consists of a ratchet wheel (12) arranged on the counterweight shaft (4) to be fast in rotation therewith and having radially open spaces (15), formed by supporting surfaces (14), for detent elements (16) mounted therein, and which comprises a stationary housing (11) motionless relatively to the counterweight shaft (4), the inner side of said housing covering the ratchet wheel (12) at a spacing which is smaller than the radial diameter of each detent element (16), and said housing comprising abutments for the detent elements (16), characterised in that

a) the abutments are constructed as recesses (23) in the form of quarter-sphere sections,

b) on the inner side of the housing (11) there are arranged grooves (21) which are open towards the inner surface (20) of the housing (11) and in the rear wall (22) of which the .forwardly and radially open quarter-sphere recesses (23) are formed,

c) a counterhousing (18) is provided which is connected to the counterforce (5) and which is freely rotatable on the counterweight shaft (4),

d) on the inner surface (19) of the counterhousing (18) projections (24) are provided, with radially inwardly open quarter-sphere-shaped recesses (25) for the detent elements (16), these engaging in the grooves (21) of the housing (11) and having a shorter length (1) as viewed in the circumferential direction than the grooves (21), and

e) the arrangement of the recesses (23, 25) in the grooves and in the projections (24) is such that when the counterhousing (18) rotates relatively to the housing (11) the quarter-sphere recesses (23, 25) can form a hemispherical recess, the circumference of the ratchet wheel (12) from the lowest part of the hemispherical recesses (23, 25) to the entry of the detent elements (16) in the event of the locking of the counterweight shaft (4) having a distance which is smaller than the diameter of the detent elements (16).

2. Apparatus according to claim 1, characterised in that the depth (t) of the grooves (21) in the housing (11) corresponds to the height (h) of the projections (24) in the counterhousing (18).

3. Apparatus according to claim 1 or 2, characterised in that at the inner side of the counterhousing (18) there is arranged a nose (30) which projects above the inner surface (19) and which engages in a groove (29) in the stationary housing (11), in which groove there is arranged a restoring spring (32) which bears on the one hand against one end of the groove (29) and on the other hand against an abutment edge (31) of the nose (30).

4. Apparatus according to claim 3, characterised in that the restoring spring (32) is constructed as a helical spring.

5. Apparatus according to one of the preceding claims, characterised in that the counterforce is formed of a torsion spring (5).

6. Apparatus according to claim 5, characterised in that the rotary movement exerted by the torsion spring (5) on the counterhousing (18) is directed oppositely to the restoring force of the restoring spring (32) in the groove (29), and the restoring force of the restoring spring (32) is smaller than the torsion force of the torsion spring (5).

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