EP0261268B1 - Locking device made of bars with locking bolts carried by the bar, the locking bolt especially containing two rollers - Google Patents

Abstract

1. Bar closure for installation - preferably in the fillet gap (10) - of sheet metal cabinet doors (12) consisting of a lock (16) with an actuating device such as a handle, pivot handle, key or the like led through the door leaf (12) to the outside, and of at least one bar (18) extending parallel to the door edge in the fillet gap (10) or the like and consisting of flat strip material, which is supported on at least one place outside the lock (16) standing upright on the door leaf (12) and displaceable longitudinally by means of guide elements having corresponding cross section (20) and with at least one holding element (38) located on the door frame for receiving the bar (18) which locks the door in the closed position, characterised in that the holding element (38) located on the door frame (24) consists of a U-section trestle (80), which is fastened with its U-section web (82) on the frame (24) in such a way, that the bar section extends between the legs (84, 86) of the U-section (88), and that the U-legs (84, 86) of the trestle (80) have cuts (92) opening in one of the axial directions of the bar (18) for receiving locking pins (40) carried by the bar (18) forming a lock.

Description

The invention relates to a rod lock for assembly preferably in the canting space of sheet metal cabinet doors, consisting of a lock with an actuating device guided through the door leaf to the outside, such as a handle, swivel handle, key or the like. rod made of flat strip material, which is mounted in an upright position on at least one point outside the lock on the door leaf by means of guide elements with a corresponding cross section, and with at least one holding element located on the door frame for. locking the door in the closed position receiving the rod.

Rod closures for assembly in the canting space of sheet metal cabinet doors with rods consisting of flat strip material, which are also mounted on the door leaf so as to be longitudinally displaceable outside the lock, are known, for example, from European patent application with publication number 0 176 890. In sheet metal cabinets with leaf-shaped cabinet doors, which are provided with an angled edge and thereby form a canting space, the requirements for the closing action of the rod lock are particularly high, because such doors have only limited stability. Such cabinet doors can warp and twist under certain circumstances, moreover, these doors are exposed to particularly high loads in certain applications. For example, if the doors of electrical control cabinets also have high-voltage switches, arcs occasionally occur inside the cabinet, which lead to the explosive release of arc gases, which leads to a high pressure load on the door.

It is therefore important to provide rod closures provided for such sheet metal cabinets in such a way that they securely connect the door to the cabinet body, so that the door can also absorb the loads described. This means that, especially in high control cabinets, locking at three points of the door, namely in the area of the lock and at the top and bottom, as is the case with most rod locks, in which the locking elements from the lock itself and from the rod ends are not sufficient. If you want to provide further locking points, these must be arranged in the middle of the rod area, which brings with it various problems. For one thing, it becomes difficult to make the arrangement so that the rods remain axially symmetrical. However, such an axial symmetry is advantageous because it ensures interchangeability of the rods, which is of crucial importance for cheap manufacture and simple assembly. Another problem lies in the fact that, depending on the arrangement of the closing means, there may be a one-sided loading of the flat ribbon rods and thus tilting, which is detrimental to the ease of movement. Subsequent changes to the structure of the rod locks, such as can occur when relocating a control cabinet, after changing the door hinging conditions or the like, are also only possible to a limited extent with known locks.

The problems of canting are particularly serious in the case of bars made of flat strip material. On the other hand, such flat strip rods are of particular advantage in control cabinets with sheet metal cabinet doors that have a tilting space, because they take advantage of the otherwise dead space in the tilting area and thus do not take up any useful space within the control cabinet. This arrangement also has the advantage that, in the case of switch cabinets to be sealed, the closure lies outside of this sealing area and therefore the openings required for the rod closure do not have to be included in the sealing measures, which saves sealing material, simplifies assembly and reduces the risk of leakage in certain operating applications .

The object of the invention is to improve a rod closure of the type mentioned in such a way that it enables the use of symmetrically constructed flat ribbon rods, without having to do without locking points in the course of the rod, and without the ease of movement or the risk being increased that the closure unintentionally loosens again due to vibrations. In addition, the rod lock should be convertible if necessary, for example, a right-hinged door should be easily converted into a left-hinged door.

The object is achieved in that the holding element located on the door frame consists of a U-shaped frame which is fastened to the frame with its U-shaped web in such a way that the rod profile runs between the legs of the U-shaped profile, furthermore in that the U-legs of the bracket in one of the axial directions of the rod opening incisions for the locking reception of locking pins carried by the rod.

These measures make the rod symmetrical on the one hand, and on the other hand the arrangement of a large number of locking points on the rod is made possible, nevertheless the rod lock is relatively simple in construction and therefore inexpensive to manufacture and easy to assemble.

Particularly advantageous is an embodiment in which the locking pins carried by the rod represent double roller pins, which are formed in that a bearing bolt or pin is rigidly guided through the rod profile on the central axis of the rod and rotatably holds a roller on both sides of the rod profile . This arrangement is extremely smooth and low in torsion.

Another advantage of the invention is that the construction enables embodiments which have further advantages. The U-shaped trestles can also act as a stop for the door when it is closed before it is locked serve serve and thereby make other anchor devices unnecessary or prevent damage to the paintwork of doors in which the stop would otherwise be done by placing the door edge on the door frame. (This happens with ventilated cabinets without seals). It is also advantageous that an embodiment is possible with the trestle according to the invention which is extremely stable and in particular prevents the hook from bending open even under high loads, which loads can occur, for example, in switch cabinets for mixed low and high voltage devices due to arcing gases. So far, such cabinets containing both low and high voltage devices had to be provided with very complex locking devices.

Because of its symmetry, the arrangement according to the invention also avoids canting effects on the flat ribbon rod and thus allows a very low-friction mounting and therefore enables the closure to be actuated with very little force. Finally, the construction according to the invention also enables a door leaf construction that is largely or completely symmetrical, also with regard to the fastening holes for the rod fastening means and also for the hinge straps arranged on the other side.

The invention is explained in more detail below on the basis of exemplary embodiments which are illustrated in the drawings.

• Fig. 1 von hinten den Verkantungsraum einer Blechschranktür mit einem in diesen Verkantungsraum eingebauten Stangenverschluß mit Rollzapfen und Halteelementen gemäß einer ersten Ausführungsform des erfindungsgemäßen Stangenverschlusses;
• Fig. 2 eine Axialschnittansicht entlang der Linie A-A der Fig. 1;
• Fig. 3 eine Axialschnittansicht entlang der Linie B-B der Fig. 1;
• Fig. 4 eine Schnittansicht entlang der Linie D-D der Fig. 1;
• Fig. 5 eine Schnittansicht entlang der Linie C-C der Fig. 1;
• Fig. 6 eine Ansicht auf einen Schaltschrank mit einem Stangenverschluß gemäß Fig. 1 bis 5;
• Fig. 7 eine Einzelteildarstellung des Verschlußhakens gemäß Fig. 1 bis 5;
• Fig. 8 in einer ähnlichen Darstellung wie Fig. 7 eine andere Ausführungsform des Verschlußhakens;
• Fig. 9 in einer ähnlichen Darstellung wie Fig. 7 und 8 eine noch andere Ausführungsform eines Verschlußhakens, hier als Stanzteil ausgeführt; und
• Fig. 10 die in Fig. 6 eingesetzte einteilige Flachbandstange in Draufsicht sowie in Seitenansicht in zwei unterschiedlichen Schloßlagermöglichkeiten.

It shows:

• Figure 1 from behind the canting space of a sheet metal cabinet door with a rod lock built into this canting space with rolling pin and holding elements according to a first embodiment of the rod lock according to the invention.
• FIG. 2 is an axial sectional view along the line AA of FIG. 1;
• Fig. 3 is an axial sectional view along the line BB of Fig. 1;
• Fig. 4 is a sectional view taken along line DD of Fig. 1;
• Fig. 5 is a sectional view taken along the line CC of Fig. 1;
• 6 shows a view of a control cabinet with a rod lock according to FIGS. 1 to 5;
• FIG. 7 shows an individual part of the locking hook according to FIGS. 1 to 5;
• FIG. 8 shows a different embodiment of the locking hook in a representation similar to FIG. 7;
• FIG. 9 shows, in a representation similar to FIGS. 7 and 8, yet another embodiment of a locking hook, here designed as a stamped part; and
• Fig. 10, the one-piece flat ribbon rod used in Fig. 6 in plan view and in side view in two different lock storage options.

Fig. 1 shows a view of the canting space 10 of a sheet metal cabinet door 12 a rod lock 14 arranged in this space, consisting of a lock 16, from which a rod 18 extending in the canting space 10 extends, which on the one hand inside the lock 16, but on the other is also slidably mounted on the door leaf 12 in a rod bearing 20. The sheet metal cabinet door 12 is hinged to the cabinet body 24 via hinge straps 22, see FIG. 2, which in turn utilize the other canting space 11, which is formed between the outer bend 26 and a profile sheet 30 which is welded to the inside of the door leaf and receives a seal 28. Usually, a rectangular opening 32 or 34 is arranged in the tilting space for the lock in sheet metal cabinets which have such tilting spaces 10, 11; when planned use of retractable pivot lever locks, there are two rectangular openings 32 and 34 arranged symmetrically to the horizontal door center 36.

As can be seen from FIG. 3, an axial sectional view along the line BB of FIG. 1, there is also a hook-like projection 38 on the cabinet body 24, into which a double roller pin 40 carried by the locking rod 18 penetrates when the rod lock is closed and so on forms a lock 42. In the sectional view C-C through this lock 32, see FIG. 5, it can be seen that the rod 18, which is rectangular in cross section and made of flat strip material, carries a pin 44 in an interference fit, which rotatably carries rollers 46 on both sides. The roles have so much play that they are easily rotatable, but can not slide off the pin 44, due to a head 48 on one side of the pin 44 and a flare 52 on the other side of the pin, which after mounting the pin and Rolling on the corresponding side of the pen is created. Instead, the scooters can also be mounted with a snap ring and in this case can be dismantled, possibly together with the pin. This would have the advantage that closed rod guides 20 can be used, which require the rod to be pushed axially.

The hook or holding element 38 is provided with a slot 50 for receiving the rod 18, the section CC, FIG. 5, the hook having a U-shape in profile, the web of the U having a threaded bore into which a fastening screw 51 can be screwed in to fix the hook 38, wherein the hook can also have a rotation lock, for example in the form of a prismatic opening in the cabinet body 24, into which corresponding projections of the hook can be inserted in a rotationally secure manner.

One possibility for the rod guide is shown in section DD, Fig. 4, which rod guide is here arranged in a rotationally secured manner by means of a stud arrangement in the corner space of the bending space 10 and is designed in such a way that the ribbon rod 18 is inserted into the guide by bending a projection or nose 54 beforehand can, after which the fastening nut 56 of the welding bolt 58 is tightened, whereby the nose 54 presses securely against the rod 18.

From Fig. 3 it can be seen that the lock 32 may comprise a lock nut and rod bearing 60 which rotatably holds a lock nut 64 carrying a pinion 62. The lock nut 64 can be rotated with the aid of an actuating device guided through the door leaf 12, such as a handle, pivoting lever, socket wrench or the like. The pinion 62, which engages in corresponding perforations or serrations 66 on the rod 18, pushes it up and down.

As shown in FIG. 3, the lock nut and rod bearing 60 consists of a base part 68, in which one end of the lock nut 64 is supported, and a cap part 70 which can be placed on the base part 68 and is fixed to the base part by means of screws 72 and the other 2, the lock nut and rod bearing 60 also forms guide slots 74 and 76 for the optional insertion of the rod 18 either in the manner shown, in which the closing direction follows the clockwise direction, or in channel 74, which results in a reverse closing direction for the actuating device.

In order to make this turning of the rod 18 and in this way a change in the direction of rotation with respect to the actuating device possible without having to make any other changes, the rod 18, see also FIG. 10, is designed to be twice axially symmetrical, namely once around the longitudinal axis 78, on the other hand, about the transverse axis 79. The symmetry also covers punched-out stop lugs 83, which lie on the outer surface of the lock 16, and thereby limit the path of movement of the rod, as well as the crankings 82, which provide the space for the arrangement of the pinion 62 result, as well as the bores 86, 88, which are provided for receiving the double roller pin 40 already described. In Fig. 10, the two described arrangements of the ribbon bar 18 are shown, which also show the mounted double roller pin 40.

The holding element in the form of the hook 38 will now be discussed in more detail. This holding element located on the door frame, which is preferably arranged near the corresponding rod guides 20, see FIG. 6, in order to make the lever arm between the guide 20 and the lock 42 as small as possible and thus to minimize the bending stress on the flat bar 18 is in FIG. 7 in a first embodiment explained in more detail, wherein this embodiment corresponds to the embodiment shown in FIGS. 1 to 5. The holding element 38 consists of a two-way U-shaped frame, the U-shaped profile 88 which surrounds the rod, see the figure at the bottom right of FIG. 7, is fastened to the door frame with its U-shaped profile 82, see Fig. 5 that the bar profile of the ribbon bar 18 extends between the legs 84, 86 of the U-profile 88. However, the U-legs 84, 86 in turn form a U-profile 90, which resulted from the fact that the U-legs of the U-profile 88 have incisions 92 which open in the axial direction of the rod 12 for the locking reception of the rollers 46, as shown in FIG 3 shows. The trestle 80 has a threaded bore 94 arranged centrally on the U-web 82 of the U-profile 88 and a polygonal projection 98 which extends around the bore 94 and projects beyond the outer surface 96 of the U-web 82, here designed as a square projection, around Bock 80 with respect to the cabinet body 24 secured against rotation by means of a screw bolt 51, see FIG. 5. For this purpose, the body or door frame 24 has corresponding punch-outs 102 (FIG. 3) which have the same cross-section as the polygonal projection 98.

As can be seen in FIG. 6, the individual locks 42 consisting of the trestles are arranged symmetrically to the horizontal door bisector 36 on the cabinet body. This has the advantage that, as already described, a symmetrical flat ribbon rod can be used. 6, the arrangement of the rod guides 20 with respect to the door bisector 36 is symmetrical on the door leaf 12, which has the further advantage that the door leaf can be used both left and right, without the arrangement of the holder of the welding studs (or screw hole openings) serving for the rod guides would have to change.

For the same reason, it is advantageous if 22 fastening holes are provided in the cabinet body for the hinge straps, which are identical to those for the locks 42. These are, for example, the rectangular openings 102 provided for receiving the projection 98, the center of which is at a distance 100 from the outer cabinet plate, which is then also valid for the corresponding openings for fastening the hinge band 22, see FIG. 2. In this way, simplified the installation of a door leaf either as a right or left-hinged door on the cabinet body. In a corresponding manner, the door leaf could have fastening means, for example stud bolts 58 for the other end of the hinge band, see reference number 104, near the prismatic opening for fastening the hinge band to the cabinet body (reference number 102). Alternatively, and shown in Fig. 2 is a fastening of the hinge band part for the door leaf by means of clamping screw 106. The pivot point 108 of the hinge band is such that the cabinet door can be opened by 180 _° even when the row cabinet is installed.

The arrangement of the rod guide 20 and the lock 42 close to one another has the further advantage that, if necessary, the components used for the rod guide, as shown for example in FIGS. 1 and 4, have a contact surface 110 which faces the lock 42 designed as a hook 38 to which a further contact surface 112, FIG. 1, which is formed by the hook 38, is placed with the door closed (however, a distance is maintained in FIG. 1!). In this case, there is a jamming of the hook 38 between the roller pin 40 and the surface 110 of the rod guide 20 and thus a particularly secure fixation, particularly in the case of a strong pressure load The sheet metal door is prevented from warping and tilting, and thus possibly becoming leaky if it is a door with a sealing device. This is of advantage, for example, in the case of explosive arc discharges within a high-voltage part of the control cabinet. The lock 42 can also have a contact surface 114 on the other side, see FIG. 1, in order to be able to use a rod guide 20 arranged on this side as a support. B. in the upper half of the cabinet door shown in Fig. 6 would be the case.

In order to make the hook 38 even more stable and, in particular, to secure it against bending open under particularly heavy loads, this hook can be further developed according to FIG. 8. In this embodiment, the incision 92 is not continuous, but there remains a web 116 which secures the normally free end of the hook against bending open in the direction of the arrow 118. The same double roller journals can be used, which are shown in FIGS. 1, 2 and 5, if only the web 116 is added. In addition, however, the incision can narrow towards the center of the base and thereby form an undercut 120 into which a specially shaped pin or double roller pin with a larger outer diameter can then be inserted. This construction provides further protection against bending open in the direction of arrow 122.

The illustration in FIG. 8 also shows small protrusions 124 extending from the outer surface 96, which can provide a rotation lock in addition to or instead of the protruding square 98.

FIG. 9 shows yet another embodiment 138 of a hook, which is punched out of sheet metal here and is equipped with two fastening holes 194 for securing against rotation. This fastening holes 194 are recessed so that a countersunk screw can be used for fastening, which in the space occupied by the flat bar inside the U-. Profile 126 does not protrude. A further special feature can be seen that the web area 182 of the hook 138 is extended in the direction of the hook opening and forms a stop surface 128 for the double roller pin 40 in the unlocked position. In this case, other attachment devices for the door leaf with respect to the door frame are unnecessary. In particular, such a stop device prevents the sheet edge 128 from lying on the outer surface 130 of the cabinet body 24 and scratching the paint there when working without seals 28.

This stop surface can also be formed by the rod guide 20, as can be seen in FIG. 3, where the front surface 134 of the rod guide 20 lies against the outer surface 136 of the cabinet body 24.

With a continuous rod, as shown in Fig. 10, or with rods running in the same direction, all hooks will be arranged in one direction, preferably in such a way that the hooks are open upwards. This has the advantage that the bar is already in the hook by its own weight.

However, you can also use two rods in the opposite direction of actuation and then the lower half of the door leaf is provided with a hook arrangement in which the hooks are towards the middle (i.e. open at the top), and in the upper door half an arrangement in which the hooks are open towards the middle (i.e. downwards). This results in a better distribution of the compressive forces caused by the penetration of the double roller pins into the hooks, so that the load on the hinge devices of the sheet metal cabinet door and thus also on the door leaf itself is greatly reduced.

In the embodiment with the stop formed by the hook, there is the advantage that the size of the incision 92 need only be slightly larger than the diameter of the double rolling pin running into it. For manufacturing reasons, only a tolerance of about 0.3 to 0.5 mm is required. Without this impact action, a larger game is to be provided.

The position of the actuating device (e.g. retractable swivel lever) should be matched to the position of the rod 18 in such a way that when the rod lock is in the closed position of rest, the center of the double roller pin is exactly aligned with the center of the fastening screw 51 according to FIG. 3. Then the correct closed position can always be reached, regardless of whether the hook is open upwards or downwards.

Claims (16)

1. Bar closure for installation - preferably in the fillet gap (10) - of sheet metal cabinet doors (12) consisting of a lock (16) with an actuating device such as a handle, pivot handle, key or the like led through the door leaf (12) to the outside, and of at least one bar (18) extending parallel to the door edge in the fillet gap (10) or the like and consisting of flat strip material, which is supported on at least one place outside the lock (16) standing upright on the door leaf (12) and displaceable longitudinally by means of guide elements having corresponding cross section (20) and with at least one holding element (38) located on the door frame for receiving the bar (18) which locks the door in the closed position, characterised in that the holding element (38) located on the door frame (24) consists of a U-section trestle (80), which is fastened with its U-section web (82) on the frame (24) in such a way, that the bar section extends between the legs (84, 86) of the U-section (88), and that the U-Iegs (84, 86) of the trestle (80) have cuts (92) opening in one of the axial directions of the bar (18) for receiving locking pins (40) carried by the bar (18) forming a lock.

2. Bar closure according to claim 1, characterised in that the locking pins (40) carried by the bar (18) represent double roll pins, which are formed by a bearing bolt or peg (44) being rigidly led through the bar section on the centre axis of the bar, said bearing bolt or peg (44) holding a roller (46) rotatably on each side of the bar section (18).

3. Bar closure according to claim 2, characterised in that the bearing pin (44) for the double roll pin (40) is held in press fit in a bore of the bar (18) and the pin (44) is widened at its ends beyond the end of the slid-on roller (46) through graining (52) or flanging of the front face of the pin and, in this way, forms a stop to prevent the roller (46) from sliding off.

4. Bar closure according to one of claims 1 to 3, characterised in that the trestle (80) has one or two threaded bores (94) or through bores (194) arranged in the U-section web (82), in the centre if need be.

5. Bar closure according to one of claims 1 to 4, characterised in that the U-section web (82) (is provided with) a polygon (98), in particular a square, reaching around the bore (94), projecting beyond the outer surface (96) of the U-section web (82) for safeguarding the trestle (80) against rotation in a correspondingly formed punch-out (102) in the door frame (24).

6. Bar closure according to one of claims 1 to 4, characterised in that near the outer corners of the outer surface (96) of the U-section web (82) projection lugs (124) are provided for increasing friction.

7. Bar closure according to one of claims 1 to 6, characterised in that the cuts (92) for receiving the pins or double roll pins (40) carried by the bar (18) are formed as grooves sunk from the inside into the U-Iegs (84, 86) with undercut (120) if need be.

8. Bar closure according to one of claims 1 to 7, characterised in that the hook-shaped holding element (138) is a stamping.

9. Bar closure according to one of claims 1 to 8, characterised in that the web region of the hook-shaped holding element (138) having the U-section is extended in the direction of the hook opening and forms a stopping surface (128) for the pin or double roll pin (40) of the bar (18) in its unlocked position.

10. Bar closure according to one of claims 1 to 9, characterised in that the holding elements (38) are arranged symmetrically to the horizontal door bisector (36) on the cabinet body or door frame (24).

11. Bar closure according to claim 10, characterised in that the holding elements (38) are arranged at the same level as the opposing joint hinges (22).

12. Bar closure according to claim 11, characterised in that the punch-outs (102) for receiving the joint hinges (22) have the same shape and arrangement as those for the holding elements (34).

13. Bar closure according to one of claims 1 to 12, characterised in that the bar guiding elements (20) are - in each instance - arranged near a holding element (38) and likewise symmetrically with respect to the door bisector (36).

14. Bar closure according to claim 13, characterised in that the bar guiding elements (20) form a contact surface (110) pointing to the holding element (38) and are arranged in such a way, that when the door is closed one contact surface (112; 114) of the holding element (38) rests against the contact surface (110) of the bar guiding element (20).

15. Bar closure according to one of claims 1 to 12, characterised in that in the case of bars (18) operating in the same direction or in the case of a one- piece bar (18) all hook-shaped holding elements (38) point in one direction, preferably opened upwards.

16. Bar closure according to one of claims 1 to 14, characterised in that in the case of two bars (18) operating in opposing directions the hook-shaped holding elements (38) in the lower half of the door are opened upwards and in the upper half of the door downwards.

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