Kitchen corner cupboard

A kitchen corner cupboard comprises a housing (12) having an upper cover plate (11) and a carousel (13) mounted therein. The carousel is provided with a vertical rotation shaft (15) which mounts at least one circular horizontal carrier plate (14a, 14b), in particular concentric to the rotation shaft (15) and a front element (18) made of two front panels (19, 20) arranged preferably at right angles or at an angle of 180.degree. to each other. The rotation shaft (15) lies at a substantial distance behind the intersection line of the imaginary extension of the front panels (41, 42) of adjacent cupboard housings. For the opening of the housing (12) the rotation shaft (15) is rotatably journalled about a vertical axis (17) at its lower end region on a diagonal translation body (25) which is diagonally translatably mounted on a base body (16) of the housing (12). In the closed rotary position of the front element (18), the rotation shaft is translatable diagonally, i.e. at an angle of preferably 45.degree., with respect to the front panels (41, 42) of adjacent cupboard housings between the closed position in which the front element (18) adjoins on either sides the front panels (41, 42) of the adjacent cupboard housings, and a position ready for rotation in which the carousel (13) can be rotated without the risk of a collision of the vertical edges (23, 24) of the cornered front (18) against the side walls (21, 22) of the housing (12).

BACKGROUND OF THE INVENTION 
The invention relates to a corner cupboard, in particular a kitchen corner 
cupboard according to the preamble of claim 1. 
In a known kitchen corner cupboard of this kind (DE-PS 27 22 629), in order 
to avoid a collision of the vertical edges with the side walls, provision 
is made that the vertical edges extend up to the lateral boundaries in the 
closed state of the cupboard, and the rotation shaft or rotary column is 
inwardly translatable from the closed position along the diagonal of the 
corner to allow the side edges to remain within the lateral boundaries 
during rotation. In this case the rotation shaft is hollow and a 
synchronization shaft extends therethrough, the synchronization shaft 
being in engagement both at the top and the bottom in guides which extend 
along the diagonal of the corner and are fixed to the floor or the cover 
plate, in the manner of a rack-and-pinion connection. In this manner a 
collision of the vertical edges of the front panels of the front element 
with the side walls of the housing of the corner cupboard is indeed 
avoided, but for this purpose, the side walls of the housing must be cut 
out in the region of their front half. Moreover, the rack-and-pinion 
connections are very expensive to manufacture. Furthermore, the rotation 
shaft must be guided on the housing both at its bottom and at its upper 
ends. 
A further drawback of the known kitchen corner cupboard resides in the fact 
that the cam tracks which ensure the diagonal displacement must be shaped 
very abruptly so that a comparatively high linear diagonal displacement 
can be initiated even by very small rotary displacements, which requires 
comparatively high rotation forces and leads to an increased wear of the 
cam tracks. In addition, a certain degree of rotation is a precondition 
for the diagonal displacement, such that corresponding slits must be left 
along the vertical edges of the front element. 
SUMMARY OF THE INVENTION 
The object of the present invention is to provide a corner cupboard, in 
particular a kitchen corner cupboard, of the kind mentioned at the 
beginning, in which the rotation shaft need not be journalled or guided at 
the top, so that it does not need to project upwardly above the uppermost 
carrier plate and a reception space uninterrupted by the rotation shaft is 
achieved in this area, and in which the diagonal displacement necessary 
for liberating the vertical edges of the front panels of the front element 
is possible independently of a rotary movement of the carousel. 
This problem is solved by the rotary and the diagonally displaceable 
mounting of the rotation shaft exclusively at its lower end. The rotation 
shaft terminates therefore at its upper end at the height of the uppermost 
carrier plate, such that a free reception space uninterrupted by the 
rotation shaft is at disposal between the uppermost carrier plate and the 
cover plate of the corner cupboard housing placed thereabove. Since the 
diagonal displacement body is displaceable linearly diagonally 
independently of a rotation movement of the rotation shaft, and indeed 
preferably in a manner locked against rotation, the slit between the 
vertical edges of the front panels of the front element and of the front 
panels of the adjacent cupboards can therefore be kept extremely narrow. 
It is only necessary that the side walls of the housing be each provided 
at their forward ends with a chamfer which extends parallel to the 
diagonal and allows the diagonal displacement of the vertical edges along 
the chamfers. 
The idea of the invention thus resides in that a particular component is 
provided in the lower region of the housing for the diagonal displacement, 
the vertical rotation shaft being rotatably journalled in a suitable 
manner on this component. Thereby all diagonal translation displacements 
and rotation displacements can be controlled largely independently of each 
other in the manner necessary for the ideal occupation of space. 
In the preferred embodiment only a diagonal translation of the carousel is 
possible from the closed rotary position, and with the exception of the 
rearmost displaced position, a rotation of the carousel is not possible. 
The rotary movement of the carousel is released only when the vertical 
edges of the front element have come free away enough from the side walls 
of the housing such that during the following rotation a collision of the 
vertical edges with the side walls is no longer possible. 
This can in particular be achieved by the fact that a blocking pin mounted 
at a fixed place on the base body of the housing, preferably on the side 
of the rotation shaft facing the front element, engages in a suitable 
transverse bore in the rotation shaft and restrains the latter against 
rotation, if the carousel is not in the position ready for rotation or a 
rotated position. Starting from the position ready for rotation the 
transverse bore is progressively displaced over the blocking pin by 
translation of the carousel towards the closed position, either 
immediately or just after a very small translation, whereby a rotation of 
the carousel is prevented in all corresponding intermediate positions and 
in the closed position, and otherwise a rotation of the carousel is 
possible when the transverse bore is fully displaced away from the 
blocking pin. 
In order to make it possible to attain easily and exactly the position 
ready for rotation from any rotary position of the carousel for thereafter 
closing the corner cupboard, a latch device as provided. This latch device 
comprises preferably a finger fixed to the rotation shaft and therefore 
rotating therewith, the finger being provided with a depression or a 
groove, in which the ball of a ball snap mounted on the diagonal 
translation body catches in the closed rotary position of the carousel and 
thereby defines this position. 
Since the distance of the diagonal translation of the carousel towards the 
interior is only limited by the diameter of the circular carrier plates 
used, the diagonal translation of the carousel can extend without 
restriction, by corresponding dimensioning of the carrier plates, as long 
as during the subsequent rotation a collision of the vertical edges with 
the side walls of the housing, which are not cut out, is avoided. 
According to the invention the inward translation of the carousel on the 
translation body is thus limited to a value, preferably by means of an 
abutment, for which during the subsequent rotation displacement the 
vertical edges of the front element do not collide with the side walls of 
the housing. 
Basically, a compulsory rotation guidance for the carousel could be 
provided after the diagonal translation has occurred until the abutment, 
such that the carousel is then compulsorily guided on a circular track, 
until a 360.degree. rotation is achieved, whereafter the carousel can then 
again be translated diagonally outwardly to the closed position. 
However, the vertical edges of the front element must then project radially 
from the rotation shaft somewhat further than the carrier plates, and 
preferably by about 10-15% further, such that if during the diagonal 
translation the carrier plates arrive in the region of the rear wall of 
the housing and for a rotation of the carousel of about 90.degree. the 
vertical edges of the front element could collide against the rear wall of 
the housing, and indeed in particular when the diagonal translation range 
of the diagonal translation body limited by the diameter of the carrier 
plates is reduced to zero. 
Another important aspect of the invention resides in that firstly the 
diagonal translation path of the translation body limited by the circular 
carrier plates is entirely reduced to zero in such a manner that the 
periphery of the carrier plate comes as close as possible to the rear wall 
of the housing, which is preferably correspondingly curved. In this case a 
nonrestrained and friction-free rotation of the carousel is still 
possible. 
As soon as the first of the two vertical edges comes so close to the rear 
wall, after a rotation of for example about 90.degree., that a collision 
can occur, the translation body is displaced again in opposite direction 
toward the front, together with the rotation shaft, by means of a 
corresponding cam-and-cam track guide, to avoid a collision of the 
vertical edges with the rear wall. In other words, the carousel is thus 
again slidably displaced forwardly, and this forward translation is 
limited by the diameter of the carrier plates, which should thereby come 
closer to the side walls of the housing to only such an extent that a 
non-restricted and friction free rotatability is still possible. Since 
however, for reasons of construction, the diameter of the carrier plates 
can only be so large that they do not come into contact with the side 
walls of the housing when the rotation shaft is in the closed position, 
the rotation shaft can practically be returned again to its forward 
starting position after a rotation of for example 90.degree. to one or the 
other side. This brings not only the advantage that the vertical edges 
projecting further radially can be moved past the curved rear wall of the 
housing without risk of collision, but also that the carrier plates also 
take their foremost position, such that they provide the best 
accessibility for the user. 
When further rotating the carousel over an angle of for example 
270.degree., there occurs again a rearward translation of the rotation 
shaft, such that a collision of the vertical edges with the other side 
wall of the housing is also avoided during this portion of the rotation 
movement. This retracted position of the rotation shaft remains until the 
closed rotary position is reached, whereafter the carousel can be then 
displaced again forwardly in the closed position, together with the front 
element. 
The preferred embodiment of the invention consists thus in that the 
rearwardly diagonally displaced position of the carousel is held only as 
long as it is necessary for the vertical edges to go past the side walls 
of the housing, whereas in all other angular positions of the carousel the 
rotation shaft generally occupies the most forwardly displaced diagonal 
position. 
The further displacement of the carousel in the closed rotary position in 
forward direction and preferably also in the rearward direction is 
determined by abutments. 
In a particularly preferred constructional embodiment, the entire 
translation mechanism is covered below the base plate and thereby safely 
arranged against soiling. From above, only the elongated hole with the 
upwardly projecting rotation shaft are apparent. A risk of hurting the 
user by the translation mechanism is also thereby safely excluded. The 
forward end and preferably also the rear end of the elongated hole form 
the abutments. 
The diagonal guides can preferably be formed by linearly displaceable 
bearings arranged at the four corners of a rectangle or of a square, 
diagonally translatable translation rods being engaged in these bearings, 
and the diagonal translation plate is in turn fixed to the translation 
rods, for example by welding. 
In order to ensure a sufficient stability of the carrier plates against 
tilting, there is provided in particular a carrier spigot. Although 
fundamentally the free diagonal translatability in the closed rotary 
position could alone be sufficient, it is nevertheless preferred to 
provide the compulsory guidance features guides a cam body. 
For the constructional realization of these compulsory guides, the cam body 
according to the preferred is particularly advantageous. 
The several forward and rearward translations within a 360.degree. rotation 
are carried out in a particularly advantageous manner. 
Another feature of the invention provides dimensions which are particularly 
advantageous. 
By means of the arrangement of the front panels, one can attain that the 
front element is adjusted particularly well and suitably in the cornered 
intermediate space between two adjacent cupboard elements.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
According to FIGS. 1 to 3, the kitchen corner cupboard of the invention 
comprises a housing 12 having two side walls 21, 22 arranged at an angle 
of 90.degree. and defining an opening 45 between their front edges, as 
well as a curved rear wall 26, a cover plate 11, a base plate 16 spaced 
from the floor 27, and a carousel 13 rotatable about a vertical axis 17, 
the structure of the carousel being described in detail hereinafter. 
The carousel 13 comprises a front element or cornered front 18 which 
occupies the opening 45 in the closed rotary position, the front element 
comprising two front panels 19, 20 arranged at a mutual angle .alpha. of 
90.degree., one panel 19 extending parallel to the side wall 22 and the 
other panel 20 extending parallel to the side wall 21. The corner 43 of 
the cornered front 18 is located in the closed rotary position on the 
diagonal 37 which is produced when one imagines that the mutually 
perpendicular extending side walls 21, 22 of the housing 12 are completed 
to form a rectangle. In this embodiment, the corner 43 coincides with the 
intersection line of the imaginary extensions of the front elements 41, 42 
of adjacent cupboard housings and is located, like this intersection line, 
at a clear spacing in front of the axis of rotation 17. 
The cornered front 18 which forms the closure of the kitchen corner 
cupboard of the invention is fixed in corresponding right angled cutouts 
of the horizontal carrier plates 14a, 14b by means of appropriate fittings 
46. The carrier plates 14a, 14b have a circular shape, with the exception 
of the right angled cutouts for the reception of the cornered front 18, 
and are mounted with a vertical spacing on a vertically extending rotation 
shaft or column 15. The vertical rotation shaft 15 extends only downwardly 
and not upwardly from the uppermost horizontal carrier plate 14b, such 
that a continuous reception space 47 uninterrupted by the rotation shaft 
15 is defined above the uppermost carrier plate 14b. 
The rotation shaft 15 rests on a vertical carrier spigot 30 so that it is 
rotatable about a vertical axis 17. The spigot 30 is fixed to a 
horizontally disposed diagonal translation plate 25 arranged below the 
base plate 16 and extends upwardly through a diagonally disposed elongated 
hole 28 of the base plate 16 until slightly above the lower carrier plate 
14a. In turn, the rotation shaft 15 which is arranged radially outwardly 
of the carrier spigot 30 also extends through the diagonal elongated hole 
28 up to a point slightly above the diagonal translation plate 25, where 
the rotation shaft 15 is also conveniently supported directly on the 
diagonal translation plate 25 by means of an axial support bearing 48. 
According to FIGS. 1 to 3, the diagonal translation plate 25 is 
rectangularly shaped, the short sides extending parallel to the diagonal 
37. Carrying and guiding rods are attached, e.g. welded, to the diagonal 
translation plate parallel to the short sides, the guiding rod extending 
on either side of the diagonal translation plate 25 a significant distance 
beyond its long sides. The two end regions of each rod 49 extending beyond 
the long sides of the diagonal translation plate 25 are diagonally 
displaceable mounted in diagonal guide blocks 29. The displacement 
movement is limited by the ends of the diagonal elongated hole 28. 
Relatively weak return springs 31 can be provided between the rear bearing 
blocks 29 and the diagonal translation plate 25, in order to bias the 
rotation shaft 15 against the front border of the elongated hole 28. 
The bearing blocks 29 are fixed to the base plate 16 from below by means of 
appropriate fittings 50. 
Owing to the described arrangement, the carousel can be translated 
diagonally within the diagonal elongated hole 28 together with the 
components which are fixed to the carousel 13, whereby the vertical edges 
23, 24 of front panels 19, 20 of the cornered front 18 can be translated 
inwardly from the closed rotary position apparent in FIG. 1 inwardly until 
the position 1 indicated in broken lines, along corresponding chamfers 44 
of the front edges of the side walls 21, 22. By the subsequent rotational 
movement in one direction 2 or the other 3, the vertical edges 23 or 24 
reach the closest distance from the side walls 21, 22 at 4 or 5, without 
colliding with the side walls 21, 22 because the diagonal translation of 
the rotation shaft 15 until the rear end of the diagonal elongated hole 28 
has been effected before the rotational movement in the direction of the 
arrow 2 or 3. 
The carousel 13 could then basically be rotated up to an angle of 
360.degree. starting from the closed rotary position, if the rear wall 26 
was at a sufficiently great distance from the carousel 13. However, with 
ideal use of the concept of the invention, the rear wall 26 is only spaced 
from the rotation axis 17 by a distance such that when further rotating 
the carousel and the vertical edges 23, 24 have finally reached the 
positions indicated by 6 or 7, where a collision of the vertical edge 23 
(6) with the rear wall 26 could directly occur, a return forward 
translation of the rotation shaft 15 within the diagonal elongated hole 28 
takes, place shortly before arriving at this position. Thus the vertical 
edges 23, 24 in fact adopt the positions 6', or 7' respectively. The same 
occurs--as also indicated by 6, 6', or 7, 7' respectively--when the 
carousel is rotated in the direction of the arrow 3 starting from the 
closed rotary position. 
After the vertical edges 23, 24 have come to the positions 6', 7', in which 
the rotation shaft 15 has been translated forwardly in the diagonal 
elongated hole 28, a further rotation of the carousel can now occur, 
during which the vertical edges 23, 24 move along the rear wall 26 between 
the two illustrated positions 6, 6', without coming into contact with the 
rear wall. By this the carrier plates 14a, 14b reach their foremost 
position, such that the objects placed on the carrier plate are ideally 
accessible. 
As soon as the vertical edges 23, 24 have again reached the positions 6', 
7', after a rotation in the range of about 270.degree., the rotation shaft 
is again steadily rearwardly translated within the elongated hole 28, 
until the vertical edges 23, 24 come again to the positions 6, 7. Then the 
further rotation can take place until the closed position, without a 
collision with the side walls 21 or 22 occurring. 
Although it is basically possible to manually control this sequence of 
movements, it is however preferred when this sequence of movements occurs 
largely in a compulsorily guided or constrained manner. 
To that effect, a cam plate 32 is mounted on the rotation shaft below the 
base plate 16 but above the diagonal translation plate 25, the cam plate 
32 having generally the triangular shape shown in FIG. 1. At a distance 
behind the rotation shaft 15 the cam plate 32 comprises an upwardly 
directed main cam 34 which is received in the closed rotary position 
within a diagonal compulsory guide track 35 formed in a guide plate 52, 
which is fixed to the base plate 16 from below. In this manner the 
carousel 13 can be displaced starting from the closed condition 
illustrated in FIG. 1 at first only in direction of the diagonal 37 until 
the main cam 34 reaches the position ready for rotation indicated at 34' 
in FIG. 1, in which the rotation shaft 15 has reached the rear end of the 
diagonal elongated hole 28. The main cam 34 is now located within a 
circular compulsory guide track 36 provided in the plate 52 which only 
permits a rotational movement of the rotation shaft to both sides up to an 
angle of about 90.degree. about the fully rearwardly translated vertical 
axis 17. Basically, this circular compulsory guide track 36 could extend 
over an angle of 360.degree., as indicated in dash and dot lines 51', in 
order to compel the carousel 13 to execute a corresponding rotational 
movement until its return to the position in which it is ready to rotate. 
This would however only be possible if the rear wall 26 was placed at a 
somewhat larger distance from the rotation axis 17 as illustrated in FIG. 
1, or if the carousel 13 with the cornered front 18 had a somewhat lower 
diameter as in FIG. 1, which could in practice occur by a certain off-set 
of the rotation axis 17 and of the elongated hole 28 in the direction of 
the cornered front 18. However, in order to ideally use the available 
space, the front and rear halves of the circular compulsory guide track 36 
are interrupted by linear guide sections 38 which extend parallel to the 
diagonal 37 and allow a return translation of the rotation shaft 15 over 
those angular ranges where the vertical edges 23, 24 are in the region of 
the rear wall 26. 
In order to now stabilize the guidance of the rotation shaft 15 also in 
those regions where it takes place parallel to the diagonal 37 and to 
control the diagonal to and fro movement of the rotation shaft 15, 
auxiliary auxiliary guide tracks 33, 33' are provided in front of or 
behind the ends of the diagonal elongated hole 28, and cooperate with 
auxiliary cams 40, 40' of the cam plate 32 which are angularly displaced 
by 90.degree. with respect to the vertical axis 17. The cams 34, 40, 40' 
are all placed in different planes. The compulsory guide tracks 35, 36 are 
in the same plane, whereas the tracks 33, 33' are placed in different 
planes both with respect to each other and with respect to the tracks 35, 
36. 
The arrangement described operates as follows: 
Starting from the closed position illustrated in FIGS. 1 to 3, the carousel 
is firstly displaced by exerting a diagonal pressure on the cornered front 
18 until the rotation shaft 15 reaches the rear end of the diagonal 
elongated hole 18. The carousel can then be rotated in one direction or 
the other. During about the first 40.degree. to 50.degree. of the 
rotational movement, the circular compulsory guide track 36 compels the 
carousel to execute a circular movement. 
After a rotation angle of about 40.degree. to 50.degree. in one direction 
or the other either the auxiliary cam 40 reaches the auxiliary compulsory 
guide track 33 or the auxiliary cam 40' reaches the auxiliary compulsory 
guide track 33' behind the elongated hole 28. Owing to the curved shape of 
these auxiliary compulsory guide tracks 33, 33' apparent from FIG. 1, the 
rotation shaft 15 is again forwardly translated within a comparatively 
small rotation angle of about 30.degree., such that the vertical edges 23, 
24 reach the positions 6', 7' instead of the positions 6, 7 which they 
would reach without the auxiliary compulsory guide tracks 33, 33'. During 
this displacement the guidance of the rotation shaft 15 is ensured 
exclusively by the auxiliary cam 40 or 40', whereas the main cam 34 is 
received with sufficient play within one of the straight sections 38. 
As soon as the positions 6', 7' have been reached, the main cam 34 enters 
the lower half of the circular compulsory guide track 36, whereby the 
rotation shaft 15, which has now reached its forward position, is rotated 
over an angle of about 130.degree. to 140.degree.. Hereafter either the 
auxiliary cam 40 or the auxiliary cam 40' enters to the associated front 
auxiliary compulsory guide track 33 or 33' and initiates the return 
translation of the rotation shaft 15 towards the rear position, and the 
main cam 34 is again received with sufficient play in one of the straight 
sections 38. 
After the rotation shaft 15 has been again translated to the rear position, 
which corresponds approximately to the positions 6, 7 of the vertical 
edges 23, 24, the last portion of the rotation movement can take place 
until 360.degree. are reached. Here the main cam 34 ensures again the 
compulsory guidance until the position ready for rotation 34' is reached. 
The carousel 13 can now be again moved diagonally forwardly into the 
closed position shown in FIG. 1 either by the action of the weak springs 
31 and/or by pulling a handle 53. 
In accordance with FIG. 4, in which the same reference numerals designate 
corresponding parts to those of FIGS. 1 to 3, one can use auxiliary cams 
40, 40" arranged above each other and also placed in different planes, 
instead of using auxiliary cams 40, 40' (FIG. 2) symmetrical to each 
other. The two embodiments are indicated in FIG. 2, but can be used only 
alternatively. 
While the upper cam 40 cooperates with the auxiliary compulsory guide track 
33 in the same manner as in the embodiment of FIGS. 1 to 3, the lower cam 
40" cooperates with an auxiliary compulsory guide track 39, which is 
shaped exactly inversely with respect to the track 33' of FIG. 1, whereby 
the same type of compulsory guidance is achieved as in FIG. 1 owing to the 
inverted arrangement of the second auxiliary cam 42 with respect to FIG. 
1. Attention is to be paid again that the auxiliary compulsory guide 
tracks 33, 39 are placed in different vertically off-set planes 
corresponding to the planes of the auxiliary cams 40, 40". The boundary 
line at either side of which the different auxiliary forced guide tracks 
33, 39 are formed is indicated in FIG. 4 by the reference 54. 
In the closed position illustrated in FIG. 1, the front panels 19, 20 of 
the cornered front 18 are flush with the front panels 41 or 42 of adjacent 
cupboard elements. The slit 55 between the vertical edges 23, 24 of the 
front panels 19, 20 and the opposite vertical edges of the front panels 
41, 42 can be selected extremely narrow. 
The chamfers 44 of the side walls 21, 22 at the front end are so selected 
that when translating the cornered front 18 rearwardly in the direction of 
the diagonal 37, the vertical edges 23, 24 can move along the front edges 
of the side walls 21, 22 without collision. 
The maximum diagonal translation path of the rotation shaft 15 is about 60 
mm. 
As indicated in FIGS. 1 and 4 by the reference 56, the base plate 16 is 
cut-out in correspondence to the cornered front or in general to the front 
element 18, while a pedestal which also has a shape corresponding to that 
of the cornered front 18, in this case a right angled shape, is placed 
below the base plate. This right angled pedestal is placed approximately 
where the cornered front 18 is placed in the rearwardly translated 
position in the diagonal elongated hole 28 (position 1 indicated in broken 
lines in FIG. 1). 
A particularly preferred embodiment of an auxiliary compulsory guide track 
arrangement 57 is shown in FIG. 5. The tracks 33 correspond to those of 
FIG. 1. Continuous junction circular guide regions 58 are however located 
between the tracks 33, and in this embodiment these circular guide regions 
58 receive the sole auxiliary cam 40 which is provided in addition to the 
main cam 34, when the main cam 34 circulates along the circular regions 36 
(FIG. 1). The position of the rotation axis 17 in the rearmost position is 
indicated by 17", the position at which the rotation axis 17 is placed 
when the rotation shaft 15 is translated again forwardly as the vertical 
edges 23 or 24 come closer to the rear wall 26 is indicated by 17'. It is 
thus not necessary that this translation takes place fully into the 
foremost position 17. 
A straight guide track 59 extending forwardly and parallel to the diagonal 
37 branches off from the left circular region 57 and linearly guides the 
auxiliary cam 40 in the position of FIG. 1. In this manner the desired 
sequence of displacement occurs by translation and rotation in the 
direction of the arrow. When the rotation takes place in the opposite 
direction, the return translation occurs angularly somewhat later, which 
can be however taken into account by an appropriate selection of the 
diameter of the carousel 13. For this, one can get away with one auxiliary 
cam 40 and a closed guide track 57. 
FIG. 6 shows schematically the relationships between the guide track 57 and 
the tracks 35, 36, 38 and the cams 34, 40. 
As shown in FIG. 7, the front panels 19, 20 can also form an angle .alpha. 
of 180.degree. and form thus a plane front element 18, whereby a 
particularly high usable surface of the carrier plates 15a and 15b is 
achieved. This surface is then located at an obtuse angle, of about 
135.degree. in the shown example, with respect to the front panels 41 and 
42 of the adjacent cupboard elements. The vertical connection center line 
43 of the front panels 19, 20 lies therefore in the same plane as their 
vertical edges 23 and 24. The front panels can thus be realized in piece 
in the form of a plate. In the closed condition of the carousel 13 each of 
the vertical edges 23 and 24 further lay in the plane of one of the front 
panels 41 or 42 of the adjacent cupboard elements; in other words they 
adjoin the latter while suitably leaving a small distance for a sufficient 
freedom of movement. 
The front panels 19, 20 can also be curved as shown in FIG. 8 and form a 
curved front element 18 which makes a transition between the planes of the 
front panels 41 and 42 of the adjacent cupboard elements, such that the 
vertical edges 23 and 24 of the front panels 19 and 20 of the corner 
cupboard comes flush with a respective front panel 41 or 42 respectively. 
The front element 18 has therefore a concave cylindrical curved shape 
which matches to certain styles of furniture. The front panels 18, 19 
adjoin in this case under an angle .alpha. of 180.degree. at the vertical 
connection center line 43. 
FIGS. 9 and 10 show a rotation lock and a latching device for the rotation 
shaft 15. The rotation lock comprises a blocking pin 60 mounted at a fixed 
place on the base body 16 and extending in the diagonal direction 37. The 
blocking pin is positioned in such a manner that it engages into a 
transverse bore 61 in the rotation shaft 16 when the latter is not in the 
position ready for rotation or close to this position, or in any desired 
rotary position. In the closed position of the rotation shaft 15 
illustrated in FIGS. 9 and 10 the transverse bore 61 is engaged to the 
greatest extent over the locking pin 60. On translation of the rotation 
shaft 15, or of the carousel 13 from the closed position into the position 
ready for rotation, the transverse bore 61 is also translated with respect 
to the blocking pin 60, Which is equivalent to an extraction of the latter 
out of the transverse bore 61. When the position ready for rotation is 
reached, or eventually shortly before this, the blocking pin 60 is fully 
extracted out of the bore 61 and the carousel 13 or the rotation shaft 15 
can then be freely rotated, in order to allow a corresponding displacement 
of the rotation shaft 15 by cam control of the latter. 
In order to simply and precisely set the position ready for rotation from 
any desired rotary positions of the carousel 13, there is provided a latch 
device 63. The latter comprises a transversely projecting finger 64 which 
is attached to the rotation shaft 15 in the vicinity of the diagonal 
translation plate 25 and can be rigidly rotated together with the rotation 
shaft 15. The finger 64 is provided at its underside and in a longitudinal 
direction with a groove 66 into which the ball 67 of a ball snap 65 
engages when the carousel 13 occupies the closed rotary position. The ball 
snap 65 represents a key and is mounted at a corresponding position on the 
diagonal translation plate 25. 
If the carousel 13 is in any rotation position and is to be brought into 
the position ready for rotation, it need only be rotated until the ball 67 
of the ball snap 65 engages the groove 66 of the finger 64. The rotation 
shaft 15 then occupies the closed rotary position or position ready for 
rotation and the carousel 13 can be displaced to the closed condition, 
while the simultaneously aligned transverse bore 61 can be engaged in a 
problem-free manner over the blocking pin 60 and prevents a rotation of 
the carousel 13 during the translation into the closed condition and when 
in the latter. 
The groove 66 can be made in the finger 64 in a particularly simple manner 
and permits a certain compensation of manufacturing tolerances. Instead of 
the groove 66 a depression having another shape can also be provided in 
the finger 64, such as for example a detent into which the ball 67 can 
engage. 
As it can further be seen from FIG. 10, rubber pads 72 and 73 are provided 
as abutments at the ends 70 and 71 of the diagonal elongated hole 28 in 
order to limit the diagonal translation path of the rotation shaft 15. 
This can also be achieved by additional or alternative stops directly for 
the diagonal translation plate 25.