EP1246213B1 - Power switch block of size 00 - Google Patents

Abstract

A casing (1) has an underpart (4) with sidewalls (5) fastened on it and connectors (6) for current bus bars. A switch cage (7) moves crosswise to the casing's longitudinal (2) and lateral (3) axes and has fuse cutout inserts and guiding fixed links. A switch lever (11) has bogie pins (15) and journals (14) guided in the sidewalls in complementary, parallel first and second recesses.

Description

The invention relates to a power strip, consisting of a housing with a lower part and side walls attached thereto and with connections for busbars, from a relative to the housing, transversely to the longitudinal and transverse axis movable switching cage arranged thereon with fuse links and guide webs and a lever in the Spaced apart pivot and journal, which are guided in complementary and parallel first and second recesses in the side walls of the housing, the second recess is open to the outside of the switching lever side upper edge of the housing and at the opposite, inner end of the second recess a bearing pocket is provided for non-positive support of the journal on the shift lever and the switching cage a plate-shaped shift lock with at least one inner locking cam is arranged, which is guided in a sliding groove in the side wall of the housing i st.

These circuit-breakers are used to switch NH fuse-links and are used in low-voltage distributions of power companies in industrial plants and large buildings. In addition to protecting the connected circuits, these devices also have the task of disconnecting certain systems or power supplies via a safe isolation route during maintenance work.

In a NH fuse-switch-disconnector strip of the type mentioned three fuse links are switched simultaneously. The load switch panel is installed in control cabinets. Thus, the depth can be kept small, and the load switch bar with their shifter must require little depth. Parts of the appliance that protrude too far into the service corridor in front of the control cabinets can have a disruptive or even accident-causing effect. On the other hand, one sees to achieve low actuation forces a long shift lever. If you want to bring the load switch bar from the operating or switch-on in the off position to switch consumers free, this is done by swinging out the shift lever. In older known Lastschaltleisten the shift lever is at a disadvantage approximately at right angles from the strip body. This results in a very large and correspondingly unfavorable depth.

A contrast improved load bar of the aforementioned type has provided by a favorable arrangement of the pivot and journal on the one hand and the complementary recesses in the side walls of the housing on the other hand measures that in the off state, a small footprint is achieved and switching with low actuation forces is possible although, for example, three fuse links can be switched simultaneously.

In this known switching strip is provided by a shift of the center of rotation from the pivot to the journal and back the opportunity to come from a switch-off in a parking position in which the shift lever can be pivoted back parallel to the switching cage resting, so that the safety edge in the control cabinet only a small depth needed and also can be secured with a lock.

However, it has been shown that the mechanism required for switching from one position to the other position with the pins and recesses works particularly well with load switch bars of sizes 1 to 3. Guide rails of size 00 now and then leadership problems may occur, and in particular the measures for locking the switching cage, for example in the parking position, not be ensured with the known locking unit with the movable buttons and latches. The dimensions are halved in the direction of the transverse axis of the load switch bar when changing from size 1 to 3 to the smaller size 00 version. Known switching strips size 1 to 3, for example, have a width of 100 mm, while the corresponding width is only 50 mm with a safety edge of size 00. The necessary elements for the mechanics, such as rotors and journals, guides and the like, are then approximately proportionally smaller, with the result that it can lead to jamming inappropriate operation especially by non-professionals. The switching paths for bars of size 00 have remained about the same size as for devices of size 1 to 3. Inappropriate operation of a proportionally reduced mechanism could be said that the mechanics is too unstable.

Will a user, for example, only replace fuse links and not get out of the off position in the park position, then it may happen to an untrained user that he unintentionally enters the third parking position when opening from the closed position by the momentum of its switching movement on the off position. To avoid this, a locking unit with movable keys and locking lugs has been articulated in the known switching strip of the type described above on the switching cage. The locking lugs can be brought into engagement with recesses in the side wall of the housing in latching engagement. The known plate-shaped shift lock, also called locking unit, is parallel and flat adjacent to a phase partition of the shift cage and is supported by this. The known Schalttsperreinheit is articulated for their operation via pivot points even on this phase partition.

Understandably, in a load switch bar with three fuse links, two phase barriers must be provided so that each fuse link is sufficiently isolated from its adjacent insert. It has now been found that in the size 1 to 3 space is enough to install a plate-shaped shift lock parallel to the phase separation wall. In the case of size 20 switch-disconnectors, this space is not available for two plates, namely the switching blocking unit on the one hand and the phase partition on the other hand. In a load switch bar size 00 so the desired lock could not be made.

In the document " EP-A-0 563 530 "A load breaker strip according to the preamble of claim 1 is disclosed.

It is therefore an object of the present invention to reshape a load switch bar of the type mentioned so that the desired switching and locking positions can be achieved with the size 00 with good ease of use and reliable.

1. a) die Schaltsperreinheit eine außen angebrachte Kipptaste hat und eine weiter innen befindliche Kippachse hat, welche durch einen äußeren, im Abstand vom inneren Rastnocken befestigten Rastnocken und ein Loch in der Seitenwandung des Schaltkäfigs verläuft, und
2. b) daß am äußeren Ende der Schiebenut eine gegabelte Verriegelungsführung mit Anschlägen gegen die Bewegung des inneren Rastnockens in Richtung der Schiebenut vorgesehen ist.

This object is achieved in that

1. a) the shift lock has an externally mounted rocker button and has a further inboard tilt axis, which extends through an outer, spaced from the inner locking cam locking cam and a hole in the side wall of the switching cage, and
2. b) that at the outer end of the sliding groove a forked locking guide is provided with stops against the movement of the inner locking cam in the direction of the sliding groove.

With the help of the shift lever, the shift cage can be pulled out of the closed position in the off position and then in a parking position even with a load switch bar size 00 and there set so that the shift lever in particular in the parking position parallel to the housing, i. is arranged parallel to the shift lever side upper edge of the housing. As a result, the switching strip requires only a relatively small overall depth both in the on and in the parked state. Moving into the individual positions by means of pivots and journals, which can be moved in the complementary recesses in the side walls of the housing. As a result, the switching cage is moved substantially perpendicular to the longitudinal and transverse axis of the housing, because the recesses are open or closed slots in this direction of movement. To achieve the preferred low depth with open circuit switched by pulling the switching cage with the help of the shift lever from the off position to the parking position in which the bearing pin, as will be explained, passes out of his leadership and thus disengaged from the side wall, so that the shift lever can be pivoted so that it is arranged parallel to the longitudinal axis of the housing and resting on its upper edge. This shift of the shift lever is achieved by shifting the center of rotation of the shift lever from the journal to the pivot. As a result of the compact design, you can again achieve the advantage of a small overall depth with a similar mechanism as with the size 1 to 3 safety edge.

Surprisingly, according to the invention, however, it is also possible to use a switching lock of similar type as in the case of bar size 1 to 3. Namely, the phase separation wall is left at the place where the plate-shaped switching blocking unit is to be arranged. It is then arranged at this point so only the plate-shaped shift lock on the switching cage and movable relative to this. The shift lock takes advantage of the effects of a phase separation wall. As a result, surprisingly, only one of the two elements is needed, in this case the switching blocking unit and not the phase separation wall. At a distance may be provided for isolating a third fuse link a phase separation wall, which is not combined with a shift lock. According to the invention, only a single switching blocking unit of the type described here is provided for a load-switching strip.

Due to the switching lock the user does not switch without authorization into the switch-off position, parking position or switch-on position. Thus, the possibility is provided, even from the off position, for example, when a machine has been switched off, an accidental restart To prevent, for example, to prevent injury to a worker working on the machine.

The pivot may be attached to the shift lever or the shift cage. It is guided in a first elongate recess in the form of a long hole in the side wall. At a distance from the pivot is the bearing pin, for example on the shift lever and is guided in a second recess with the bearing pocket for non-positive support of the journal. The bearing pocket extends from the second recess a little way in the direction of the longitudinal axis of the housing, while the second recess in the direction of movement of the switching cage extends a distance and then ends, so that the bearing pin out of the second recess and can move freely, namely to apply the shift lever to the top of the case and back. Therefore, the second recess is also open to the outside. Outside is the outer, front side, which the user first sees when opening the control cabinet. Therefore, the storage bag is in the direction of the user further inside.

In the same way, the plate-shaped shift locking unit extends substantially in the direction of the user, ie from outside to inside. Consequently, the at least one inner locking cam is located at the inner end of the plate-shaped shift locking unit which is the farthest away from the observer. Perpendicular to the direction of movement of the switching cage engages the inner locking cam in a sliding groove in the side wall or comes into snap engagement with the same by a stop or the like. Before the locking engagement or after the inner locking cam slides in the sliding groove, which is located in the side wall and also extends in the direction of movement of the switching cage, i. perpendicular to the longitudinal and transverse axis of the housing.

Forming the height of the shift lock unit to be equal to the height of the side wall causes the surprisingly simple function that the disk-shaped shift lock unit itself becomes a phase partition wall. As well as the spaced apart and approximately parallel actual phase separation wall is the plate-shaped Schalttsperreinheit, guided with the switching cage, always between two fuse links, if they are used.

In contrast to the known, also called locking unit switching lock the Schalttsperreinheit according to the invention simpler yet highly effective designed. It is provided at its outer end with a tilt button. The user only needs to grasp them and can thus move the plate-shaped shift lock unit in the permitted direction, namely pivoting about a tilting axis. The holder of the outer locking cam of the shift lock is bendable, so that a tilting movement is made possible. Held is the shift lock by a hole in the side wall of the switching cage, through which extends the outer locking cam. If one with tolerance or small distance of 0.1 to 2 mm, preferably 0.5 to 1 mm, can engage in the hole in the cage wall, you can pan or tilt the shift lock to the resulting tilting axis.

The load switch strip according to the invention has at the outer end of the sliding groove a forked locking guide with stops. The sliding groove is located in the side wall on the lower part. It is easy to attach stops at desired locations of Schniebenut in this. The at least one inner locking cam of the shift lock is guided on the one hand in the sliding groove, but on the other hand can only move up to the intended stop because it is in the way of its sliding movement. The locking guide is forked to provide alternative movement possibilities. The tilting axis allows namely a tilting of the shift lock in both the one and in the other direction. This allows a displacement of the inner latching cam to one or the other side of the locking guide, which of course is in communication with the sliding groove. In this way it is possible to extend the switching cage to a certain height (for example, switch-off position), wherein the inner locking cam then moves against the first stop and is stopped there. By tilting the shift lock unit in one direction, the inner locking cam can then allow a further withdrawal movement of the shift cage, for example in a parking position. There, further stops may be provided to prevent further withdrawal and / or pushing the locking cam and thus the switching cage. For example, these stops can be used to define the parking position.

It can be seen how the measures according to the invention also make it possible to connect a load-switching strip of size 00 comfortably, whereby switching and locking positions can be achieved reliably and very comfortably.

It is expedient according to the invention further when two guide tongues are mounted on the inside of the switching cage at a distance greater than the thickness of the plate-shaped shift lock unit from each other. The plane spanned by each of the two guide tongues lies parallel to the farther away phase separation wall. It is also parallel to the plate-shaped shift lock, which is inserted between the two guide tongues spaced apart and held in a form-fitting manner. It is not just one, but there are two guide tongues, so that the switching lock can be inserted between both and held by them. In addition, small projections on the inner surfaces of the two guide tongues may be provided to allow the tilting with the interposed inserted plate-shaped shift lock. The two guide tongues extend inwardly from the underside or inside of the switching cage only a small distance from, for example, 5 to 25 mm, preferably 10 to 15 mm. It must be ensured that none of the two guide tongues reaches into the space inside between two fuse links, because this space already from the plate-shaped Schalttsperreinheit is taken, whose height is approximately equal to the height of the side wall of the housing, as described above. Arrangement, mounting and operation options of the plate-shaped shift lock are guaranteed by the two guide tongues excellent even with a load switch bar in size 00.

A further advantageous embodiment of the invention is characterized in that the forked locking guide in continuation of the sliding groove has two groove branches forming the fork, one of which ends in a bearing pocket. In plan view of the sliding groove, the bifurcated locking guide can be referred to as a V-shaped, wherein the lower tip of the V is to be considered at the transition point between the locking guide and the sliding groove. The inner locking cam can slide in this way along the sliding groove to the outside or alternatively inward and can in the case of sliding outwards when the switch cage is pushed from the switch-on in the off or even in the park position, from the sliding groove directly into slip on one or the other Nutenast the locking guide. In which of the Nutenäste he slides into, depends on the position of the plate-shaped shift lock, which can be tilted forward or alternatively back in the longitudinal direction of the housing. On one of the two Nutenäste a bearing pocket is arranged in continuation of the Nutenastes, which extends parallel to the longitudinal axis of the 'housing and is open to one side, i. opens at this open side in the Nutenast. The locking cam can thus get out of the sliding groove on the Nutenast in the storage bag and vice versa.

It is also advantageous according to the invention, when both Nutenäste extend at least partially in the outward direction to the switching lever-side upper edge of the housing and a grooved open expires outwardly to this upper edge. The latter is the notch that does not end in a storage bag. Rather, this notch on the outside of the upper edge of the housing is open so that the locking cam when sliding outward from the sliding groove on this Nutenast completely slide out of the locking guide with the result that you can remove the switching cage of the housing.

It is also advantageous according to the invention, when in the plate-shaped shift lock next to the at least one outer locking cam to form a support web a recess is freely mounted for easy bending of the support web. The switching lock has a plate shape. In plan view perpendicular to the plate is seen as a main part of a rectangular plate with two longer, opposite narrow edges and two shorter, perpendicular thereto narrow edges. In addition to the outer narrow edge is at least one outer locking cam. This protrudes beyond the longer narrow edge perpendicular to this in the plane of the plate, approximately in the region of the outer short, narrow edge. By just these outer locking cam and the tilting axis runs, which has already been described above.

Preferably, located on the outer narrow edge of the switching lock a retaining tongue, via which a tilt button can be clamped and / or locked. If the user presses the tilting key vertically in the viewing direction perpendicular to the plate of the shift lock, then the larger lower or inner part of the disk, namely below the tilt axis, pivots toward the observer. This is the tilting of the shift lock in one direction.

Thus, the shift lock can be mounted very easily, the outer locking cam sits on a support web, and this is formed by a recess in the plate of the shift lock in the region of the outer locking cam. When mounting the support bar can easily bend, so that the outer locking cam by a fraction of a millimeter, possibly up to 2 mm, can be offset from the narrow longer edge outside to the inside. This can additionally be promoted by an insertion be outside of the locking cam. This makes it easier to introduce the outer locking cam in the mentioned hole in the side wall of the switching cage. About the locking cam, the shift lock is securely held in this way in the side wall of the switching cage. The outer locking cam extends in the same direction as the inner locking cam or parallel to this direction of extension.

In a further advantageous embodiment of the invention in each case an inner and an outer locking cam are attached to two opposite narrow edges of the plate-shaped shift lock. In principle, although an outer and an inner locking cams on the switching lock, it is particularly favorable if, however, four locking cams are provided, one outer and one inner latching cams on each of the two longer, opposite narrow edges. The attacking forces are then halved and prevent by the symmetrical structure of any jamming.

It is also useful if in a further embodiment of the invention on the inside of the cage in the longitudinal direction of the load switch bar at a distance from the two guide tongues, which is equal to the distance between two fuse links, a bendable phase partition is attached, the free, inner end carries a stop which is in the outermost, the parking position of the switching cage engageable with a cover attached to the base in locking engagement, and when at least one cheek of the shift lever, an actuating projection such that upon pivoting of the shift lever, the stopper of the cover is disengaged. It is understood that the phase separation wall on the inside of the switching cage is fixed thereto along a plane which is parallel to the plane of the two guide tongues. Between the plate-shaped shift lock and thus the two guide tongues on the switching cage on the one hand and the phase separation wall on the switching cage on the other hand comes a fuse link to lie; and on the outside each a further fuse link, if it is a safety edge with three fuse links is. This is satisfied under the condition that the two guide tongues on the one hand and the phase separation wall on the other hand are arranged in the longitudinal direction of the load switching strip at the same distance from each other as two centers of adjacent fuse links. The phase separation wall according to the invention is advantageously bendable. On the inside of the switch cage, one side of the phase partition is fixed, and the end of the phase partition opposite this side can be bent freely to some degree and also carries a stop. If the phase separation wall is not bent, but in the unloaded state straight or flat, then the stop abuts during the movement of the switching cage from outside to inside on a cover attached to the lower part such that the switching cage can not be moved further inward in the direction switch position. This is a lock intervention. It is of course important to ensure that the cover attached to the base sits at the correct height, so that the blocking effect occurs at the right moment. It has been found in a practical embodiment to be preferred when using the already attached in the safety edge on the lower part contact covers, against which this stop on the phase separation wall starts to lock.

The bending of the phase separation wall to bring the stop out of locking engagement, achieved by an actuating lug, which is attached to at least one cheek of the shift lever and secured so above that when pivoting the lever and thus the cheek, the actuating lug against the phase separation wall starts and this bends so that the stop is brought out of the cover out of locking engagement. In this way, in the blocking position, it is possible to relieve the forces acting on the switching blocking unit, for example to distribute them in half. Had you only provided the locking guide with a stop, for example, a stop in the storage bag, for locking by the inner locking lugs of the shift lock, then the lock against pulling out and pushing the switch cage would be asymmetric, so that tilting of the cage in the one or other direction would not be excluded. Due to the advantageous arrangement of the phase separation wall with the stop, the support forces are balanced in unauthorized or unintentional switching on or attempted switching off. The cover on the lower part of the housing is like a counter-stop against the stop on the phase separation wall, thereby preventing movement of the switching cage relative to the housing.

For example, if you turn the gear lever outward from the parking position to enter the open position, then the phase separation wall is bent outward by the operating lug and the stop is disengaged from the cover. Only then is a pushing in of the switching cage from the park to the switch-off position possible. This is an increased ease of use, and it defined conditions are created. During this pivoting of the shift lever from the space-saving parking position in the direction of the switch-off position, the bearing pin moves next to the side wall in the direction of the externally open second recess and from there into the area of the bearing shell, because the stop on the phase separation wall is out of locking engagement. By these defined conditions, a shift of the rotation of the shift lever from the pivot back to the journal can again take place. Adhering to these defined conditions avoids jamming or blocking the operation, especially in the case of an untrained user. In order for reliable switching means are provided and locking measures possible to lock the cage in different positions relative to the housing to lock without locking unattachably.

It is understood that preferably not only in a side wall a sliding groove is present, but symmetrically on the opposite side wall, especially since the housing has a U-shape in cross section and thus extend the opposite two inner locking cams in the two then sliding grooves and of these can be controlled in their movement.

An assembly of the new load switch bar and in particular the plate-shaped shift lock is easy and convenient. The two guide plates on the inside of the switching cage serve, for example, a better introduction of the plate-shaped shift lock between the two guide plates.

In operation, the shift lever is flat on the cage, and this rests on the top of the side walls so that the safety edge in the cabinet has an extremely low overall depth. To switch off the user opens the cabinet, takes the lever and pulls this together with the cage to the outside, facing his gaze, in the off position. The shift lock allows pulling up to the open position in that the inner locking cam slide in the sliding groove outwards until the beginning of the locking guide. There, run the inner locking cam against a stop, which is to be thought of arranged at the lower tip of the V of the locking guide. The user must now decide whether he wants to use one or the other Nutenast, ie remove the cage and remove the housing or go into the park position. If the latter is the case, the shift lock is tilted so that the inner locking cam slide in that Nutenast that ends in a bearing pocket. This may be a reverse L-shaped slot guide. The crossbar of the L forms the storage bag. If the inner locking cam has reached the connecting corner and the user does not press further on the tilting key of the shift locking unit, then this pivots back into the vertical zero position, as a result of which the inner locking cam moves into the bearing pocket. This is also the parking position, in which it is possible to pivot the shift lever in space-saving parallel position. The bearing pocket is practically provided on its two opposite sides with stops such that the switching cage without actuation the shift lock unit can neither be pulled out nor pressed inwards in the direction of the switch-on position again.

The measures according to the invention allow an easily manufactured and stable shift lock. This forms at the same time a phase separation wall such that only a single plate is provided as a phase partition for the load switch bar size 00. This allows for the space available. The tilting of the new shift lock represents a very simple operation. In the side wall is due to the measures according to the invention a particularly simple locking guide. To all this is even easier to assemble after the manufacture and / or the replacement of parts of the load bar according to the invention, without tilting or special Einfädelungsbewegung.

Figur 1

eine Seitenschnittansicht des Gehäuses mit Schalthebel in Parallelstellung in der Betriebsposition, welche die Einschaltstellung ist,

Figur2

eine ähnliche Ansicht wie Figur 1, wobei jedoch der Schaltkäfig durch Betätigen des Schalthebels in die Ausschaltstellung aus dem Gehäuse herausgezogen ist,

Figur 3

die gleiche Stellung und Ansicht wie Figur 2, wobei jedoch die Schaltsperreinheit betätigt und so gekippt ist, daß der unten angebracht zu denkende innere Rastnocken in denjenigen Nutenast hinübergeschoben worden ist, der in einer Lagertasche endet,

Figur 4

eine abgebrochene und vergrößerte Position ähnlich wie Figur 3, wobei jedoch der Schaltkäfig die Parkposition erreicht hat, in welcher der Schalthebel flach auf dem Schaltkäfig aufliegt und die inneren Rastnocken sich in der Lagertasche befinden,

Figur 5

eine Position ähnlich Figur 3, wobei jedoch die Schaltsperreinheit anders betätigt, d.h. in die der Figur 3 entgegengesetzte Richtung so gekippt ist, daß der innere Rastnocken längs des anderen Nutenastes, welcher nicht mit einer Lagertasche versehen ist, sondern frei nach außen endet, nach außen oben so gleiten kann, daß man den Schaltkäfig vom Unterteil entnehmen kann,

Figur 6

eine Draufsicht auf die plattenförmige Schaltsperreinheit und

Figur 7

eine perspektivische Ansicht der Schaltsperreinheit.

Further advantages, features and applications of the present invention will become apparent from the following description of preferred embodiments in conjunction with the accompanying drawings. In these show:

FIG. 1

a side sectional view of the housing with shift lever in parallel position in the operating position, which is the closed position,

Figur2

a view similar to Figure 1, but with the switching cage is pulled out by pressing the shift lever in the open position of the housing,

FIG. 3

the same position and view as Figure 2, but wherein the shift lock is actuated and tilted so that the attached below to be thought inner locking cam has been pushed over in that Nutenast that ends in a storage bag,

FIG. 4

a broken and enlarged position similar to Figure 3, but wherein the switching cage has reached the parking position in which the shift lever rests flat on the shift cage and the inner locking cams are in the storage bag,

FIG. 5

a position similar to Figure 3, but with the shift lock operated differently, ie in the opposite direction of Figure 3 is tilted so that the inner locking cam along the other Nutenast, which is not provided with a bearing pocket, but free ends to the outside, to the outside can slide up so that you can remove the cage from the lower part,

FIG. 6

a plan view of the plate-shaped shift lock and

FIG. 7

a perspective view of the shift lock.

In the embodiments shown here is an NH fuse load switching strip, the mounting plane as shown in Figures 1 to 5 is perpendicular to the paper plane and extends through the lower horizontal edge of the housing 1, the longitudinal axis 2 is indicated by dash-dotted lines in Figure 1. This is parallel to the mounting plane and perpendicular to the transverse direction 3 of the housing 1, as indicated by the cross point of two cross lines in a circle.

The housing 1 has a lower part 4 and two side walls 5 attached thereto, of which the front side wall is cut off so that the viewer looks at the rear side wall 5. This results in the housing 1 in cross section, the shape of a U, as not visible in the drawings, but for the expert is clearly conceivable.

The generally designated 6 terminal area is not explained in more detail, because it is not essential to the invention here.

In the contact hooks 13, not shown busbars in a conventional manner and are pressed by the contact hooks 13 fixed to the mounting plane of the lower part 4. The connection to the supply contacts is also not shown in these documents, because not essential to the invention. However, the contact covers 19 arranged over the supply contacts are of interest.

Separated from the housing 1, the load switch bar further on the switching cage 7 with attached fuse links, because it does not depend on the fuse links according to the invention, these are not shown in the drawing. However, one recognizes the externally extending (in the drawings above) phase separation wall 20. In the direction 9 of the movement or movement possibility of the switching cage 7 with respect to the housing 1 in the side wall 5 unspecified explained guide grooves 8, in which not shown , guide rails 9 fastened to the switching cage 7 can slide in order to guide the switching cage 7 perpendicular to the fastening plane 9 in the pulling or sliding direction 9.

The load switch bar also has a shift lever 11, which has in its interior cheeks 12 and a transverse web, not shown. At its outer end opposite the gripping inner end not specifically drawn bearing pin and at a distance (small lever) arranged therefrom pivot 15 are provided in the area 14. In each cheek 12, a pivot pin 15 runs, and in each side wall 5, a slot 16 is disposed in the region of a station of a fuse in which the pivot 15 is received, while the bearing pin (in the area 14) in a parallel to the slot 16, elongated , Not shown second recess are guided.

On the inside of the switching cage 7 are located at a distance a two guide tongues 10 from each other. This distance is seen in the longitudinal direction 2 of the housing, so that the plane defined by the respective guide tongue plane is parallel to the plane of the phase separation wall 20. From the outside above is inserted between these guide tongues 10 a shift lock 18, the plate shape has and clearly shown in Figures 6 and 7 drawn out.

The plate-shaped shift locking unit 18 preferably made by injection molding of a solid plastic is substantially rectangular in plan view according to FIG. 6 with two opposite longer narrow edges 21 and at the inner (lower) and outer (upper) ends opposite shorter narrow edges 22. Of the longer narrow ones Edges 21 are in the direction of the extension of the shorter narrow edges 22 inside two opposing inner locking cam 23 out, while in the upper end region in the same direction outer locking cam 24 protrude with employed mounting bevels 25. The latter are attached to support webs 26, which result from recesses 27 which serve to deflect the support webs 26 during assembly and tilting of the shift lock unit 18.

In the upper, outer end region of the plate-shaped shift locking unit 18, a tilting key 29 is attached by clamping on a retaining tongue 28. This tilting key is pivotable about a tilting axis 31 by pushing in one of the two directions shown by the double arrow 30.

The height H of the side wall 5 is approximately equal to the height h of the shift lock 18. The distance between the inner locking cam 23 of the outer locking cam 24 is indicated in Figure 6 with b. The tilting axis 31 of the switching locking unit 18 extends through the outer locking cams 24, which are each arranged in a hole (not shown) in the side wall 32 of the switching cage 7.

The respective one inner locking cam 23 is guided in a sliding groove 33 in the side wall 5 of the housing 1. As shown in FIGS. 2 to 5, a forked locking guide, generally designated 34, is disposed at the upper outer end of the sliding groove 33. This forms a continuation of the sliding groove 33 and has two Nutenäste 35, 36. Like a fork, the two grooved branches 35 and 36 spread up and out from their point of connection. The right-hand Nutenast 35 terminates in a bearing pocket 37. The other Nutenast 36 runs freely upwards and outwards to the upper side 38 of the housing 1 on the switching lever side.

The thickness d of the plate-shaped shift lock unit 18 is slightly smaller than the distance a of the two guide tongues 10 from one another. At a distance A from the plate-shaped shift locking unit 18 is located on the inside of the switching cage 7, a bendable phase separation wall 20, the free, inner end carries a stop 40. This is in the outermost, the parking position of the switching cage 7 (Figure 4) with the contact cover 19 in locking engagement.

A projecting from the cheek 12 of the shift lever 11 actuating lug 39 is at a distance from the pivot 15 so and is so laterally from the cheek 12, that when pivoting the shift lever in its farthest swung-out position of the stopper 40 of the contact cover 19 except locking engagement comes.

By the locking guide 34, a lower stop 41 and opposite a central stop 42 and an outer stop 43 are formed. Between the middle (42) and the outer stop 43 of the locking guide 34 is the already mentioned bearing pocket 37th

The phase separation wall 20 is also relieved and extends straight from the inside to the outside as well as the plate of the shift lock 18. The respective inner locking cam 23 is located at the lower end of the slide groove 33rd

If the user wishes to switch off the consumer, then he takes the shift lever 11 and turns it around the bearing pin in the area 14 in a clockwise direction as shown here in the off position II of Figure 2. Here, the pivot pin 15 moves up and out along the slot , whereby the switch cage 7 is pulled together with the shift lock device 18 upwards and outwards. The inner locking cam 23 abuts against the lower stop 41 of the locking guide 34 at the upper end of this movement possibility.

If the user now desires to bring the switch cage 7 into the parking position, then he must tilt the tilting key 29 of the shift lock unit 18 in the direction shown in FIG. 3 to the left in such a way that the plate-shaped shift lock unit 18 rotates counterclockwise about the tilting axis 31. As a result, the inner locking cam 23 is pushed into the right Nutenast 35, which ends with the bearing pocket 37. Now unlocking has taken place, and the user can by means of the shift lever 11, the switching cage 7 even further upward in the direction of the double arrow 9 pulls outwards until the locking cam 23 anfährt against the bottom of the bearing pocket 37, whereby the switching cage 7 in his in Figure 4 shown parking position III passes. The plate-shaped shift lock unit 18 can tilt in the bearing pocket 37 in its relaxed position back to the left, so that the inner locking cam 23 between the central stop 42 and the outer stop 43 of the bearing pocket 37 are captured. The switching cage 7 can now be pulled neither further up nor pressed down and in, without the switching lock 18 would be actuated.

The user can rather turn the shift lever 11 in the parking position III in a counterclockwise direction by shifting the fulcrum of the bearing pin 14 in the pivot pin 15.

If, on the other hand, the user wishes to leave this parking position, this is by no means possible by simply depressing the switching cage inwards. He does not succeed even when he tilts the shift lock 18 in the unlocked position shown in Figure 3. The reason is that the stopper 40 is on the phase separation wall 20 as shown in FIG 4 with the contact cover 19 in locking engagement. The user must therefore first swing out the shift lever 11, whereby the operating lug 39 bends the bendable phase separation wall in the direction of the longitudinal axis 2 of the housing and thus brings the stop 40 of the contact cover 19 out of locking engagement. Now the user can push the switch cage 7 inwards or downwards, as shown in FIG.

The other movements are reversed as described above when pulling out.

If the user wants to alternatively replace a fuse link, then he must remove the switch cage 7 from the housing 1. For this purpose, the shift locking unit 18 is tilted about the tilting axis 31 in the clockwise direction as shown in FIG. The inner locking cam 23 enters in this way in the left Nutenast, which runs freely upwards in the direction of schalthebelseitiger upper edge 38 of the housing. A withdrawal of the switching cage 7 from the housing 1 is possible.

LIST OF REFERENCE NUMBERS

1

casing

2

Longitudinal axis of the housing

3

Transverse direction of the housing

4

lower part

5

sidewall

6

terminal region

7

cage

8th

guide

9

Direction of movement / possibility of the switching cage

10

guide tongues

11

gear lever

12

Wangen

13

Contact hook

14

pivot

15

pivot

16

Long hole

18

Shift lock unit

19

Contact cover

20

phase partition

21

longer narrow edge

22

shorter narrow edge

23

inner locking cam

24

outer locking cam

25

Mounting sloping surface

26

carrying web

27

recess

28

holding tongue

29

Tilt button

30

Pressure / tilting direction

31

tilt axis

32

Sidewall of the switch cage 7

33

sliding groove

34

locking guide

35

Nutenast

36

Nutenast

37

bearing pocket

38

Shifter side upper edge

39

actuating nose

40

attack

41

lower stop of the locking guide 34th

42

middle stop the locking guide 34th

43

outer stop of the locking guide 34th

A

Distance between the switching blocking unit 19 and the phase separation wall 20

a

Distance of the guide tongues 10

b

Distance between the inner and outer locking cams

H

Height of the side wall

H

Height of the shift lock

I

on position

II

off position

III

parking position

Claims (7)

1. A load switching block comprising a housing (1) with a bottom portion (4) and side walls (5) fixed thereto and with connections (6) for current bus bars, a switching cage (7) movable relative to the housing (1) transversely with respect to its longitudinal axis (2) and its transverse axis (3), with arranged thereon fuse cartridges and guide limbs, and a switching lever (11) with mutually spaced rotary (15) and mounting projections (14) which are guided in complementary and parallel first and second openings (16) in the side walls (5) of the housing (1), wherein the second opening is open outwardly to the switching lever-side top edge of the housing (1) and provided at the opposite inner end of the second opening is a mounting pocket for force-lockingly supporting the mounting projection (14) on the switching lever (11) and arranged on the switching cage (7) is a plate-form switching locking unit (18) having at least one inner latching projection (23) guided in a slide groove (33) in the side wall (5) of the housing (1), wherein the height (H) of the side wall (5) is approximately equal to the height (h) of the switching locking unit (18),
   characterised in that

   a) the switching locking unit (18) has an externally mounted tilt button (29) and a further inwardly disposed tilt axis (31) which extends through an outer latching projection (24) fixed at the spacing (b) from the inner latching projection (23), and a hole in the side wall (32) of the switching cage (7), and

   b) provided at the outer end of the slide groove (34) is a forked locking guide (34) having abutments (41-43) to prevent the movement of the inner latching projection (23) in the direction of the slide groove (33).
2. A load switching block according to claim 1 characterised in that two guide tongues (10) are mounted on the inside of the switching cage (7) at the spacing (a) greater than the thickness (d) of the plate-form switching locking unit (18) from each other.
3. A load switching block according to claim 1 or claim 2 characterised in that the forked locking guide (34) in a continuation of the slide groove (33) has two groove branches (35, 36) which form the fork and of which one (35) terminates in a mounting pocket (37).
4. A load switching block according to one of claims 1 to 3 characterised in that both groove branches (35, 36) extend at least partly in a direction outwardly to the switching lever-side top edge (38) of the housing (1) and a groove branch (36) terminates freely outwardly to said surface (38).
5. A load switching block according to one of claims 1 to 4 characterised in that provided in the plate-form switching locking unit (18) beside the at least one outer latching projection (24) forming a carrier limb (26) is an opening (27) for slight flexing of the carrier limb (26).
6. A load switching block according to one of claims 1 to 5 characterised in that an inner and an outer latching projection (23, 24) are respectively fixed to each of two mutually opposite narrow edges (21) of the plate-form switching locking unit (18).
7. A load switching block according to one of claims 1 to 6 characterised in that a bendable phase separation wall (20) is fixed on the inside of the switching cage (7) in the longitudinal direction (2) of the load switching block at a spacing (A) from the two guide tongues (10), which is equal to the spacing of two fuse cartridges, the free inner end of the phase separation wall (20) carrying an abutment (40) which in the outermost parked position of the switching cage (7) can be brought into locking engagement with a cover (19) fixed to the lower portion (4), and that an actuating protrusion (39) projects from at least one side plate portion (12) of the switching lever (11) in such a way that upon pivotal movement of the switching lever (11) the abutment (40) is moved out of locking engagement from the cover (19).

Images