EP0172351A1 - Safety catch - Google Patents

Abstract

1. Catching device for a single- or multi-part closure leaf for a building, such as a door leaf, more particularly in lifting doors, up-and-over doors or the like, said door being substantially vertically movable, at least in the closing area, said device being held on both sides preferably in the lower side region, by means of tensionable tensioning means (14), such as wire cables in particular, on a manually operated or motor-driven drive mechanism and/or weight equalising device, having a catching member (23) for each tensioning means, said member being controlled as a function of the tensile stress thereon, such that when the tensioning means are subjected to tensile stress said catching member is held in a release position (25) which does not impede the operating movement of the door and when there is no tension on the tensioning means the catching member is movably guided, under spring-loaded biasing force, into a catching position (26) in which the catching member acts in positive or frictional engagement on a catching rail (7) arranged to extend parallel to the direction of the movement of the door, characterized in that a catching member housing (10) is provided on which the catching member (23) is movably guided between the release position (25) and the catching position (26), said housing containing the catching member (23) in the release position (25) and having a lateral opening (19) through which an engagement portion (24) of the catching member (23) passes in the course of the transition from the release position (25) into the catching position (26) and outside the catching member housing (10) into the region of the catching rail (7), in the catching member housing (10) receives the tensioning means (14) at one (16) of its two opposite end faces (16, 17) and in that the catching member housing (10) has, at its other end face (17), a guide opening (28) through which a pin (12) passes in longitudinally movable manner, said pin being adapted to be secured to the door (1) by its end (13) located outside the catching member housing (10) and said pin acting on the catching member (23) by its end portion (29) located within the catching member housing (1) and said pin being biased by a spring (32) arranged inside the catching member housing (10) into a position of displacement (40) into the inferior of the catching member housing (10).

Description

The invention relates to a fishing gear with the features of the preamble of claim 1.

Such fishing gear, which often work with catch pawls, are known in a wide variety of designs, for example from DE-AS 27 35 123.

A quick and reliable response is expected from these fishing devices if the respectively assigned traction cable strand becomes slack, for example because the weight compensation device or the drive device fails or the traction cable strand itself breaks. However, the known fishing gear often works too slowly, is too expensive to build or is not safe from damage and has to be serviced frequently, which is sometimes very difficult.

The invention has for its object to provide a gear of the type mentioned, which works quickly and safely, is protected against dirt and damage and in particular can also be easily maintained and checked for functionality.

Starting from a gear with the features of the preamble of claim 1, this object is achieved according to the invention by its characterizing features.

By arranging practically all the parts to be moved in the course of a catching process inside a housing, the catching device is initially protected against dirt and damage, the arrangement being such that the catching member gets into the catching position before the associated traction cable strand slackens or tears due to its inertia, the shutter leaf or door leaf moves downwards to a significant extent. The spring used in this context is also located within the housing, so it is primarily protected against the fact that its effective spring length is restricted by foreign bodies that are unwantedly stored in the spring travel.

In principle, the catching element can be transferred from the release position to the catching position along a translational path by the spring-loaded bolt in the case of slackening of the rope. In a particularly preferred manner, the catch member is designed as a catch pawl which is pivotably mounted within the housing and engages with an inclined surface seen in the longitudinal direction of the bolt on the bolt end lying inside the housing, so that the bolt pivots the catch toward the outside of the housing into the catch position due to its spring load, as soon as the spring can work due to a broken rope or the like.

The spring arranged between the closure sheet and the traction element strand has the advantage that accelerations of the closure leaf applied in manual operation, in particular, are transmitted in a dampened manner to the weight compensation device, so that the traction element strands, which are designed in particular as ropes, cannot jump off the cable drums. So far, a separate spring arm has been provided for this. Characterized in that the catching device designed according to the invention also fulfills this function, one can do without the spring lever which is otherwise to be provided in the same place.

The fishing gear is particularly preferably designed such that the direction of movement of the catch member runs approximately perpendicular to the plane of the closure leaf, so that the catch member engages in the catch position on a catch rail which can advantageously be arranged close to the surf of the gate opening to be closed. This allows the forces that occur when catching, which may be considerable, to be dissipated well into the masonry; the rest of the construction can be carried out correspondingly more easily. For this purpose, the catch member housing, which moves in relation to the locking sheet in the event of a catch, is supported at least on its side facing away from the catch rail. The catching device basically works over the entire path that the closing sheet travels between its open position and its inclined position. In overhead gates, especially overhead sectional gates, the forces that drive and / or weight disappear same device exerts on the door leaf when it is in the open position, that is, the lower edge is located in the region of the arcuate transitions of the guide rails. This practical disappearance of the rope tension can be used to transfer the catch from the release position to the catch position without it engaging in catch with the catch rail, since catch is not necessary in this area. This has the particular advantage that the catch is kept common. A similar situation can be achieved with a manually operated door if the door leaf runs into the open position against a stop.

Usually only one rope breaks or only one weight compensation spring breaks, so that the door is caught on one side and can tilt when the shaft is separated. In addition, the door leaf makes lateral movements within a certain scope. With appropriately wide catch openings you can ensure that no jamming occurs in all these cases. You often have the need to open or close a trapped door leaf. This is done simply by reaching under and lifting the door leaf with a forklift or the like. For lowering, in a particularly preferred embodiment of the invention, the catch member can be locked in the release position, for example fixed in this position by a screw. In this way, the door leaf can be opened and closed. In the normal case, the catch member can be actuated particularly simply through this locking opening with the aid of a pin or the like to check the functionality.

The gear can be easily attached to building locks of the type in question. With existing, cable-borne door leaves, all you have to do is loosen the cable attachment to the laterally protruding fastening bolts and attach them to the bolts of the safety gear housing, while the cable end is laid in the safety gear housing and fastened there, which is preferably done on the pivot axis of the safety catch. In the case of a motorized door leaf, the catch member can be moved into the catch position for actuation of a supply current switch. In a preferred embodiment of the invention, a second movement under the force of a second spring is provided for this purpose, which works following the spring that triggers the catching element.

Further embodiments of the invention result from the subclaims in connection with the exemplary embodiments shown in the drawing, to which particular reference is made and the following description of which explains the invention in more detail.

• Fig. 1 einen unteren Seitenbereich eines Torblattes mit Rollenführungsschiene und Fanggerät in Draufsicht auf den Torblattbereich;
• Fig. 2 denselben Eckbereich, jedoch in Richtung des Drahtseiles gesehen;
• Fig. 3 eine Ansicht auf die Schmalseite des Torblattes mit geschnittenem Fanggliedgehäuse und der Fangklinke in Freigabestellung;
• Fig. 4 eine der Fig. 3 entsprechende Darstellung mit der Fangklinke in Fangstellung.

Show it

• 1 shows a lower side area of a door leaf with roller guide rail and safety gear in a top view of the door leaf area;
• Figure 2 seen the same corner area, but in the direction of the wire rope.
• 3 shows a view of the narrow side of the door leaf with a cut catch housing and the catch pawl in the release position;
• Fig. 4 is a representation corresponding to FIG. 3 with the catch pawl in the catch position.

As can be seen in particular from FIGS. 1 and 2, rollers 3, which are embedded in a guide rail 4, are fastened to the door leaf via roller holders. A large number of these roller holders and rollers are available, in particular in a so-called sectional door, as is known. Furthermore, of course, one has to imagine the components and construction measures provided for the right edge area in the image in mirror symmetry for the left edge area (not shown) of the door leaf. The guide rails 4 are fixed by means of brackets 5 in the area of the side edge of the building opening in a manner not shown. To the stops stanchions 5 are at the same time fixed rails 7, which are thus also located in the area of the side building opening 6 and can support them there accordingly. As can be seen in particular in Figure 1, the fong rails 7 are provided with a series of longitudinally arranged catch openings 8 which are relatively wide, in the present case wider than the side of a catch member housing 10 facing them, which is arranged in the narrow side area of the door leaf, such as this reveals above all Fig. 2. A guide fitting 11 engages on the housing side opposite the catch rail 7, so that the catch member housing 10 with catch member located in the catch position - FIG. 4 - does not move from the catch rail - as described later - when the catch member 10 moves along its narrow side with respect to the door leaf 1 7 can avoid evasive.

Fig. 1 shows - like the figures 3 and 4 - a bolt 12 which engages at 13 on a fastening bolt 27, 13 may be an eye within a tab. This bolt 12 engages through the lower end face 17 of the housing 10 in its interior. A clamping sleeve 15 is passed through the upper end face 16 opposite this end face, with which the wire rope 14 serving as a traction means strand is combined to form a loop.

The partial sectional views according to FIGS. 3 and 4 clearly show the design of the catching member housing 10 and the components assigned to it. Within its longitudinal side wall 18 facing the catch rail 7, the housing has a lateral opening 19 which lies opposite the housing side 20, on which the guide fitting 11 engages in a supporting manner. The further lateral housing walls 21, which extend perpendicular to the landings 18 and 20 and of which only the rear one can be seen due to the housing cut, hold between them a pivot axis 22 about which the catch pawl 23 is pivotably mounted. As can be seen in FIG. 3, the swivel pawl together with the pawl nose is located within the catch member housing 10 when the catch pawl 23 is in the associated is _h örigen cable 14 in the release position, which represents the normal operation with intact rope properly working weight balancer and the like.. The bolt 12 held in the lower side region of the door leaf by means of the use 13 and the fastening bolt 27 passes through the lower end face 17 through a through opening 28. In its end region located inside the housing, the bolt 12 is provided with a head 29 which is widened in such a way that the side surfaces of the bolt head are guided on the inner walls of the housing. Between the inner wall of the lower end face 17 of the housing 10 and the lower surface of the head 29 opposite this, a helical compression spring 32 is provided, through which the bolt shaft is passed. Arranged around the helical spring is an _n- shaped stop 33, which in turn is supported at one end on the inner surface of the side 17 and at the other end on the lower surface of the head 29 facing it. As shown in Fig. 3, the bolt 12 is in tension with the rope 14 with its head 29 in contact with the stop 33, so that the helical compression spring 32 has its greatest possible compression.

On the bolt head 29, a bevel 30 is formed which, with respect to the bevel, corresponds to the course of an inclined surface 31 against which the bevel 30 rests and which, starting from the pawl nose 24, is formed on the catch pawl in the region of the catch pawl opposite the pivot axis 22. This system is shown in FIG. 3 for the release position 25 of the catch.

If the cable 14 breaks or loses its tension for other reasons, the housing 10 moves downwards relative to the bolt 12, namely under the force of the compressed and now relaxing spring 32, much faster than the initial speed of the door leaf, which is now at risk of falling. In Fig. 4 the relative position between the solid line 10 housing 10 and the dash-dotted head 29 of the bolt 12 is shown, so that the spring 32 relaxing in this dotted end shift position 40 gets into the interior of the housing. The head 29 presses its bevel 30 along the inclined surface 31 of the catch pawl 23, sliding the catch pawl in rotary motion around the pivot axis 22 with the pawl nose 24 first through the lateral opening 19, so that the pawl nose 24 into the catch opening 8 next to the bottom Catch rail 7 engages, as shown in Fig. 4. The catch pawl 23 is thus in the catch position 26 in this position.

The clamping sleeve 15 of the cable 14 passes through a passage opening 34 in the upper end face 16 of the housing 10, and also in a longitudinally displaceable manner. The rope loop lying inside the housing 10 engages in a thimble 35, which in turn comprises the pivot axis 22, with a certain amount of play in such a way that when the rope slackens a compression spring arranged between the inner wall of the end face 16 and the thimble 35, the engages around the rope 14 and its end returned through the sleeve 15, displaces the thimble 35 by a small distance with respect to the pivot axis 22 into the housing interior. On the thimble 35, an actuator 38 of an electrical switch 39 engages with which a drive motor provided here is switched off. Since the helical compression spring 32, which comprises the bolt 12, is designed to be harder or stiffer than the compression spring 36, which encompasses the cable 14, the housing 10 first moves relative to the bolt 12, so that the catch pawl 23 moves into its catch position 26, whereupon the displacement of the thimble 35 for actuating the switch 39 takes place.

As shown in FIG. 3, the catch pawl 23 has on its side facing away from the catch rail 7 a threaded blind hole 41 which, in the release position 25 of the pawl 23, is aligned with a bore 42 in the housing side 20 with respect to its input opening. By means of a screw inserted from the outside of the housing through the bore 42 into the threaded blind hole 41, the catch pawl 23 can be held in the release position or returned to it and locked there if the door leaf is not only to be opened after a fall - the catch pawl would be like a ratchet - but also lockable should be, for example with the help of a forklift, until the defective rope or the fault leading to the rope becoming slack has been eliminated.

As already briefly mentioned at the beginning, the catch openings 8 are very wide transversely to the direction of movement of the door leaf 1, namely by a multiple of the width of the latch nose 24, so that the door can be caught safely in any possible lateral displacement movement. A one-sided error, such as a rope break, does not result in the door jamming in such a way that it cannot be lifted.

Claims (22)

1.Gear for an at least in the closing area approximately vertically movable, one-part or multi-part building closure leaf, such as gate leaf, in particular lifting gates, overhead sectional gates or the like, which on both sides, preferably in the lower side region, by means of a tensile member train that can withstand tensile loads, such as in particular wire rope, is held on a manually operated or motor-driven drive device and / or weight compensation device, with a catch element provided for each traction element strand and controlled in dependence on its tensile load, which, when the traction element strand is tensioned, is held in a release position that leaves the operating movement of the closure leaf unimpeded and is untensioned when the strain relief is released Traction means strand is guided displaceably into a catch position under a spring-related pretensioning force, in which the catch member engages positively or non-positively on a catch rail that runs parallel to the direction of movement of the closure leaf t, characterized in that a catch member housing (10) is provided, on which the catch member (23) is displaceably guided between the release position (25) and the catch position (26), in which the catch member (23) is in the release position (25 ) is accommodated and which has a lateral opening (19) through which an engagement section (24) of the safety catch of (23) in the course of the transition from the release position (25) to the catch position (26) outside the catch member housing (10) in the area of the catch rail (7) that the catch member housing (10) on a 16) of both of them opposite end faces (16, 17) receives the traction element strand (14) and
that the catch member housing (10) has on its other end face (17) a through opening (28) which is penetrated by a bolt (12) which is longitudinally displaceable, the end (13) of the catch leaf (1) outside the catch member housing (10) on the closure sheet (1 ) is to be defined, which engages with its end region (29) located inside the catch member housing (10) on the catch member (23) and which is arranged by a spring (32) arranged inside the catch member housing (10) into an inside of the catch member housing (10 ) directed displacement position (40) is applied. 2. gear according to claim 1,
characterized in that the catch member (23) is displaceably guided approximately perpendicular to the plane of the closure leaf in the attachment area of the catch member housing (10) between the release position (25) and the catch position (26) and in the catch position (26) on the side edge area in the installed position ( 6) which engages with the catch rail (7) to be arranged through the closure sheet (1) to be closed. 3. gear according to claim 1 or 2,
characterized in that the catch member housing (10) and the fixing formation (13) of the end of the bolt (12) on the closure leaf side are designed to be arranged in the narrow side region (9) of the closure leaf (1). 4. Gear according to one of claims 1 to 3,
characterized in that the catch member is designed as a catch pawl (23) which is pivotably mounted on the catch member housing (10) and which is in the release position (25) is located practically completely inside the catch member housing (10) and engages in the catch position (26) with its engagement section designed as a latch nose (24) in a catch opening (8) of the catch rail (7). 5. gear according to claim 4,
characterized in that the bolt (12) is provided at its end region located inside the catching member housing (10) with a head (29) which engages on an inclined surface (31) of the catching pawl (23) which adjoins the pawl nose (24) is trained. 6. gear according to claim 5,
characterized in that the spring is designed as a helical compression spring (32) which surrounds the shaft of the bolt (12) and between its head (29) and the inner wall of the other end face (which has the passage opening (28) for the bolt (12)) 17) of the catch member housing (10) is arranged. 7. gear according to claim 5 or 6,
characterized in that the head (29) of the bolt (12) is guided so as to be displaceable in the longitudinal direction of the bolt in contact with at least part of the inner side surfaces of the catching member housing (10). 8. Gear according to one of claims 1 to 7,
characterized in that the end of the bolt (12) located in the interior of the catching member housing (10) is provided with a bevel (30) with which it bears on a correspondingly extending inclined surface (31) of the catch pawl (23) in the release position (25) ) is present. 9. Gear according to one of claims 1 to 8,
characterized in that a stop (33) is provided within the catch member housing (10) and limits the movement of the bolt (12) towards the outside of the housing (10). 10. gear according to claim 9,
characterized in that the stop (33) is arranged laterally outside the helical compression spring (32) between the head (29) of the bolt (12) and the inner wall of the other end face (17) of the catching member housing (10) and the compression movement of the helical compression spring (32 ) limited. 11. Gear according to one of claims 1 to 10,
characterized in that the end region of the bolt (12) located outside the catching member housing (10) has a swivel fastening design, in particular in the form of an eyelet (13). 12. Gear according to one of claims 1 to 11,
characterized in that the traction means strand (14) is passed through one end face (16) of the catching member housing (10). 13. gear according to claim 12,
characterized in that the traction element strand (14, 15) is accommodated in a longitudinally displaceable manner within a passage opening (34) in one end face (16) of the catching member housing (10). 14. Gear according to claim 12 or 13,
characterized in that the traction means strand (14) is fastened inside the catching member housing (10). 15. gear according to claim 14,
characterized in that the traction means strand (14) has a certain displaceability in the longitudinal direction relative to its fixing point (22) within the catching member housing (10). 16. Gear according to one of claims 13 to 15,
characterized in that between the fastening-side end of the traction element strand (14), in particular in the form of a rope thimble (35), and the inner wall of one end face (16) of the catching member housing (10) a compression spring (36), in particular encompassing the traction element strand (14) , is arranged that an actuating element (38) of an electrical switch (39) engages at the end of the traction means strand (14) or the thimble (35) and that this compression spring (36) is weaker than the helical compression spring (32). 17. Gear according to one of claims 13 to 16,
characterized in that the end of the traction means strand (14) or the thimble (35) engages around the pivot axis (22) of the catch pawl (23). 18. Gear according to one of claims 1 to 17,
characterized in that the catching member housing (10) is displaced with respect to the closure leaf (1) at least at the side opening (19) with respect to its displacement with respect to the tension member strand (14) becoming loose under the force of the screw compression spring (32) and possibly the compression spring (36) ) for the passage of the catching member (23) having side wall (18) opposite housing side (20) is guided (11). 19. Gear according to one of claims 1 to 18,
characterized in that the catch rail (7) has a series of catch openings (8) which follow one another over their longitudinal extent for the positive engagement of the catch member (23) and which, seen transversely to the direction of movement of the closure leaf (1), are substantially, preferably a multiple, wider design are seen as the pawl nose (24) in the same direction. 20. Gear according to one of claims 1 to 19,
characterized in that the catch member (23) can be fixed in its release position regardless of the tension state of the traction element strand (14). 21. Gear according to claim 20,
characterized in that the catch pawl (23) has on its side opposite the lateral opening (19) of the catching member housing (10) a threaded bore (41) into which a locking screw passes from the outside of the housing side (20) opposite the lateral opening (19) a correspondingly aligned bore (42) can be screwed in. 22. Gear according to one of claims 1 to 21,
characterized in that the catch member housing (10) and the components connected therewith are designed to be mirror-symmetrical with respect to a plane running in the direction of displacement of the catch member (23) such that an optional arrangement in the right or left narrow side region (9) of the closure leaf (1) is possible.

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