U.S. patent number 3,602,567 [Application Number 04/832,743] was granted by the patent office on 1971-08-31 for collapsible cabinets.
This patent grant is currently assigned to Firma Faitz Schafer GmbH. Invention is credited to Manfred Schafer, Manfred Schnell, Carl Adolf Weidt.
United States Patent |
3,602,567 |
Schnell , et al. |
August 31, 1971 |
COLLAPSIBLE CABINETS
Abstract
A collapsible cabinet, preferably made of sheet metal, consists
of a base, a top, rear wall, sidewalls, and a door frame. The
sidewalls are located relative to the base and top by projecting
angle portions which fit around the corners of the base and top,
and the rear wall and door frame are secured in position by
interlocking hooks which extend lengthwise thereof and of the
sidewalls.
Inventors: |
Schnell; Manfred (Baden-Baden,
DT), Weidt; Carl Adolf (Siegen, DT),
Schafer; Manfred (Salchendorf, DT) |
Assignee: |
Firma Faitz Schafer GmbH
(Bahnhofstrasse, DT)
|
Family
ID: |
5703691 |
Appl.
No.: |
04/832,743 |
Filed: |
June 12, 1969 |
Foreign Application Priority Data
|
|
|
|
|
Jun 28, 1969 [DT] |
|
|
P 17 790 26.0 |
|
Current U.S.
Class: |
312/257.1;
312/198 |
Current CPC
Class: |
A47B
17/00 (20130101); A47B 47/03 (20130101) |
Current International
Class: |
A47B
47/03 (20060101); A47B 17/00 (20060101); A47B
47/00 (20060101); A47b 043/00 (); A47b
047/00 () |
Field of
Search: |
;312/257,240-241,257S,263,264,350,111,198,108,265 ;217/12-16 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Franklin; Jordan
Assistant Examiner: Larkin; Geo. V.
Claims
We claim:
1. A collapsible cabinet, comprising a base, a cover, a door frame
and lateral sidewalls the longitudinal edges of which are arranged
for interlocking engagement, wherein the longitudinal edges are
provided with portions bent over through approximately 180.degree.
to form hooks for interlocking engagement, two opposed sidewalls, a
rear element and an opposed front element are provided with
abutment angles arranged to enflank the corner areas of the base
and of the cover, and wherein horizontal bent over portions are
provided on the sidewalls and the rear element and base and cover
relative to the walls and frames.
2. A cabinet according to claim 1 made of sheet metal, wherein the
elements provided with the abutment angles are either bent over at
right angles along their vertical sides.
3. A cabinet according to claim 1, wherein the distance between the
upper end of an abutment angle and a bent over portion associated
therewith is less than the height of the cover, said distance being
preferably one-half that of the cover.
4. A cabinet according to claim 3, wherein the lower abutment
angles project beyond the underside of the base by a distance equal
to that by which the cover projects above the upper ends of the
upper abutment angles.
5. A cabinet according to claim 3, wherein the cover for a deep
cabinet is provided with slots arranged to receive base abutment
angles of less deep cabinets.
6. A cabinet according to claim 1, wherein the sidewalls and the
door frame have identical upper and lower edges so that they may be
installed in positions turned through 180.degree. around horizontal
axes.
7. A cabinet according to claim 1, wherein the door frame has a
central post and the rear wall has a guide rail, the central post
and the guide rail having portions bent over through 180.degree.
for insertion of partitions constructed to be identical to the
sidewalls.
8. A cabinet according to claim 1, wherein a lower member and
preferably also an upper member of the door frame is an angle
section which enflanks the front edge of the base of the
cabinet.
9. A cabinet according to claim 1, wherein the sidewalls are bent
over to Z-shape in cross section to form guide rails for drawers,
an upwardly directed freestanding limb of the bent over portion
acting as a guiding rail and preferably being doubly bent.
10. a cabinet according to claim 1, wherein a door is journaled by
means of bearing pins secured to the door frame by means of bolts,
the bolts being countersunk into the outer surface of the frame by
the sheet metal being drawn into depressions on the bearing
pins.
11. A cabinet according to claim 1, wherein the sidewalls and door
frames are secured to the base and to the cover, preferably by
means of bolts and wing nuts.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to collapsible cabinets comprising a base, a
top, a door frame, a rear wall, and sidewalls the longitudinal
edges of which are arranged for interlocking engagement.
Such cabinets may be employed for many purposes. Their special
advantage reside in that the cabinets may be carried to the place
of assembly in the collapsed state, and need not be assembled until
after arrival. Great saving can thereby be obtained on transport
charges, since the very great amount of space required in
comparison to weight in the case of hollow units, in no longer
needed. Economical shipping over long distances, e.g. overseas is
also becoming possible.
2. Description of the Prior Art
In a known collapsible shelving assembly of sheet material (British
Pat. Specifications Nos. 925,756 and 942,739), the vertical edges
of the lateral sides are bent over twice at right angles to form a
U-shaped element open towards the interior of the shelving
assembly, and the engaging portions of the connecting elements
possessing the corresponding detention elements correspond to the
size of the opening of the U-shaped elements into which they are
inserted with a friction fit at right angles to the longitudinal
extension of the U-shaped elements. Extensive welding is
unavoidable in order that the engaging elements may be adapted to
the size of the aperture of the U-shaped elements for a shelving
assembly or cupboard of this nature. The choice of material is
restricted considerably by this requirement. High-grade sheet
steel, which is difficult to weld, can be employed only with
considerable labor costs. Plastic-coated sheet metal cannot be
employed at all, since the plastic layer would be destroyed during
welding.
It is an object of the invention to provide a stable cabinet the
structure of which is such as to eliminate welding as far as
possible, and which can be assembled with other similar cabinets in
an interlocking manner.
SUMMARY
According to the invention there is provided a collapsible cabinet,
comprising a base, a cover, a door frame and lateral sidewalls, the
longitudinal edges of which are arranged for interlocking
engagement, wherein the longitudinal edges are provided with
portions bent over through approximately 180.degree.to form hooks
for interlocking engagement, two opposed sidewalls, a rear wall and
an opposed door frame or two opposed door frames are provided with
abutment angles arranged to enflank the corner areas of the base
and of the cover, and wherein horizontal bent over portions are
provided on the sides and frames to determine the position of the
base and cover relative to the walls and frames.
In a cabinet as just set forth the sidewalls and the door frame or
frames are braced relative to each other by the base and the top.
This is accomplished by virtue of the fact that the corners of the
base and top are enflanked by abutment angles or the like which
prevent the walls and door frames from falling inwards. With this
kind of cabinet it is unnecessary for the sides and the frame to be
secured along their vertical edges and the hooks merely have to
prevent the sides from being pulled apart. By appropriate
dimensioning of the sidewalls relative to the base and top, a
predetermined tension can easily be established, so that a fully
shakeproof cohesion is established. The sides are of relatively
simple form and can therefore be produced by sheet-metal working,
by simple bending processes, without welding. Welding is thus
needed only for door frames, and this is acceptable since it is
applied to only a small part of the cabinet. The substantial
elimination of welding has the advantage that it is possible, for
example, to employ high-grade sheet steel or plastic-coated sheet
metal, so that, for example, laboratory furniture can be built in
the form of cabinets according to the invention. The invention is
not limited to application to sheet-metal structures. In a wooden
structure, the interlocking parts and the abutment angles can be
formed by special metal fittings.
Because the cabinet is collapsible it is easily transportable, and
a plurality of the cabinets can be employed for erection of
assemblies of lockers which may be set up in self-service stores.
Such lockers are of special advantage in supermarkets having two
halls, between which a vestibule with entries and exits is
situated. The lockers can be set up on the vestibule. The customers
can then place their bags, etc., in the lockers. After making
purchases in one hall, baskets or trolleys carrying the goods can
be locked up, leaving the hands free for purchases in the other
hall.
In one embodiment of the invention made of sheet metal, the
elements are provided with abutment angle members which are either
bent over at right angles at their vertical sides or alternatively
in the case of a door frame it is provided with vertical sections
each having a portion bent over at right angles. In a structure of
this kind, the longitudinal reinforcements of the sidewalls have
their upper extremities acting as abutment angles. A structure of
this kind is extremely simple and offers great rigidity.
According to an advantageous form of the invention, the distance
between the upper end of an abutment angle and a bent over portion
associated therewith is less than the height of the cover, said
distance being preferably one-half that of the cover. In a cabinet
having this structure, the lower abutment angles preferably project
over the underside of the base by a distance equal to that by which
the cover projects above the upper ends of the upper abutment
angles. This structure of the cabinets renders it possible to stack
them on each other, since the lower projecting abutment angles can
fit over the top projecting beyond the upper abutment angles, thus
providing a very satisfactory immobilization.
The cover for a deep cabinet may be provided with slots arranged to
receive base abutment angles of less deep cabinets.
The vertical sidewalls and the door frames may have identical upper
and lower edges so that they may be installed in positions turned
through 180.degree. around horizontal axes. This has the advantage
that a frame made as a door frame can be employed for doors
intended to open to the left as well as for doors intended to open
to the right, since the door hinges are positioned at the other
side by rotation of the cabinet through 180.degree.. This ability
to turn a cabinet also has the advantage that a lock arranged at
the middle cannot be displaced to different vertical levels.
The term "door frame" when used herein is intended to include a
frame surrounding an opening, which may, for example, be an opening
for a drawer and which may be secured, as by screws, to the base
and/or the top, preferably by means of bolts with wing nuts.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a cabinet system in which are
combined a number of cabinets of different size constructed in the
form of lockers;
FIG. 2 is a perspective view of a cabinet during assembly;
FIG. 3 is a plan view of a cabinet before a top is fitted
thereto;
FIG. 4 is a perspective view of a lower corner of a door frame with
a central post;
FIG. 5 is an end view of the cabinet system shown in FIG. 1;
FIG. 6 is a perspective view of the portion shown in the dotted
circle VI, FIG. 5;
FIG. 7 is a section through the position of connection between two
cabinets placed one on the other;
FIG. 8 is a diagrammatic front view of a cabinet with a drawer;
FIG. 9 is a perspective view of a cabinet side formed as a guide
rail for a drawer;
FIG. 10 is a section through the mounting of a door;
FIG. 11 is a front view of a cabinet arranged as a double
wardrobe;
FIG. 12 is a front view of a cabinet arranged as a set of
shelves;
FIG. 13 is a front view of a writing desk comprising two cabinet
units constructed according to the invention;
FIG. 14 is a diagrammatic view of the desk of FIG. 3 packaged for
storage or transit, and
FIG. 15 is a front view of shelves having fitted therebetween a
cabinet according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings, the cabinet system according to FIG. 1
comprises two identical and relatively large bottom cabinets 1a,
1b, adjoined laterally by smaller cabinets 2a to 2d. The cabinet 1
a supports cabinets 3 and 4, of which the cabinet 3 has two
compartments and the cabinet 4 has three compartments, each
compartment being closed by a door. The cabinet 3 is of slightly
greater height that the cabinet 4. The cabinet 1b carries small
cabinets 5a, 5b which contain drawers, one of which is shown in the
pulled out condition. The cabinet 5a supports a cabinet 6 of the
same size as that of the cabinets 2a to 2d. All the cabinets are
assembled according to the principle illustrated in FIGS. 2 to 10,
irrespective of size, which is described in detail below.
Each cabinet has a base 7 (see FIG. 2), a rear wall 8, a front door
frame 9 and sidewalls 10, only one such sidewall, as well as a top
panel 11 (see FIG. 6) being illustrated in FIG. 2.
In the sheet metal structures illustrated in the drawings, the base
7 is formed from a plane sheet metal panel by bending the edges
over twice at right angles, as apparent from the cross section
according to FIG. 5. If need be, the base 7 may also have
reinforcements. The rear wall 8 has the shape shown in FIGS. 2 and
3. In essence, it consists of the actual wall surface 12 which has
a bent over portion 13, FIG. 2, at the bottom and a bent over
portion 14 at the top. The vertical edges are bent over to form
hooks as illustrated in FIG. 3, that is firstly through 90.degree.
(at 15) and secondly through 180.degree. (at 16). As can be seen
from FIG. 2, the bent over portions 13, 14, are inset relative to
the upper edges 17 and the lower edges 18.
The door frame 9 has the shape shown in FIGS. 2 to 4. The lower
member 19 of the frame 9 is an angle section, FIG. 2, and the upper
frame member 19' is an identical angle section. The vertical
members are formed by identical sections 20, 20', shaped as shown
in FIGS. 3 and 4. FIG. 3 shows that the frame sections 20, 20' each
have a portion bent over at 90.degree. corresponding to the bent
over portion 15 of the wall 8, and a bent over portion 22 at
180.degree. corresponding to the bent over portion 21 (see FIG. 4).
A limb 220 is incorporated moreover, so that the vertical profiles
20, 20' each have a J-shaped cross section with a flat base 24. The
frames 9 may also have a central post 23 which has the same cross
section as that of sections 20, 20'. The base 24 is extended to
form a weld-on lug 25, FIG. 4.
The sidewalls 10 each have a lower horizontal bent over portion 26
(see FIG. 2) and an upper horizontal bent over portion 27. The
configuration of the vertical edges is also shown in FIG. 3 from
which it will be seen that the vertical edges are bent over through
180.degree. to form hooks 28.
The cabinet is assembled in the following manner. The rear wall 8
and the door frame 9 are initially placed on the base 7. The two
sidewalls 10 are then inserted from above, so that the 180.degree.
bends on the rear wall and door frame on the one hand and on the
side walls on the other hand, interlock as shown in FIG. 3. During
this insertion, the bent over portions 13 of the rear wall 8 and 26
of the sidewalls are placed on the upper side of the base, whereas
the lower frame member 19 enflanks the front edge of the base. The
top or cover 11 is then placed in position, being of analogous form
to that of the base 7 i.e. being produced from a flat metal sheet
or plate the edges of which are bent over at right angles twice.
After the cover has been placed in position, the abutment angles
29, FIG. 2, which project above the bent over portions 14, enflank
the corners of the cover 11, as shown in FIG. 6. The lower abutment
angles enflank the corners of the base 7 in the same manner. As
will be understood from the drawings, the base 7 and the cover 11
hold the sidewalls in spaced relation in such manner that they
cannot fall inwards. The base 7 and the cover 11 also have the
effect that the interlocking hooks 16, 28 (see FIG. 3) cannot be
pulled apart. The dimensions may easily be chosen in such manner
that a definite state of stress is induced after insertion of the
cover, which ensures that all parts of the cabinet are held
together in wobbleproof manner.
Small guiding angles 30, FIG. 3, may be provided on the inner sides
of the frame sections, to facilitate the assembly of the cabinet by
preventing the sidewalls from falling inwards before positioning of
the cover 11. Screw-holes 31, FIG. 2, may be provided in the
abutment angles, to make it possible to connect the interlocked
cabinet parts by means of bolts.
For securing partitions 65 (see FIG. 3) the rear wall 8 may carry a
rail 64 having hooks corresponding to the hooks 16, 22.
FIGS. 5 and 6 show a system consisting of several cabinets, the
cabinets shown in section in FIG. 5 being the cabinets 3 and 4 of
FIG. 1. As will be seen from FIG. 6 the height h of the cabinet
cover 11 is greater than the distance a (see FIG. 2) by which the
bent over portion 14 lies below the upper extremities 17 of the
abutment angles. As a result, the cover 11 extends above the upper
extremities 17 by approximately the height h. The cabinet 3 placed
on top of cabinet 1a is so constructed that its lower abutment
angles 29' project below the underside of the base of the cabinet,
so that the front abutment angles 29' of the upper cabinet 33
enflank the cover 11 of the cabinet 1a at the corners, see also
FIG. 1.
Since the depth t.sub.1 of the cabinet 1a is greater than the depth
t.sub.2 of the cabinet 3, the rear wall of the cabinet 3 is not
situated in the same plane as the rear wall of the cabinet 1a
Accordingly, the cover 11 is provided with slots 31', FIG. 6, into
which are inserted the rear abutment angles of the cabinet 3. The
cabinet 4 also has a depth t.sub.2 and its lower abutment angles
can therefore enflank all four corners of the lower cabinet 3.
As shown in FIG. 7, the superimposed cabinets may be secured one to
another. 11 and 11' are covers of two adjacent cabinets, say of the
cabinets 1a and 1b, FIG. 1, whereas 20' is a frame section of the
lower cabinet 1a, 20" is a frame section of the cabinet 3, 20"' is
a frame section of the cabinet 1b, and 20"' may be a frame section
of the cabinet 5a. The adjacent cabinets are then interconnected by
means of bolts 32 and wing nuts 33. To this end, the bolts 32 are
inserted through holes 31 in the covers 11, 11' and in the frame
sections 20.
FIGS. 8 and 9 illustrate the structure of a cabinet comprising a
drawer. The front opening frame of a cabinet, say of the cabinet
5a, is shown dotted at 34 in FIG. 8. The sidewalls, marked 35 and
36 in this case, and of which the partition 36 is shown in enlarged
perspective in FIG. 6, are bent over at right angles twice, at the
top, namely at 37 and 38, so as to form a Z-shaped cross section.
The upwardly projecting limb is bent over through 180.degree. at 39
and acts as a guiding rail for a drawer 40 whose lateral edges are
bent over to U-shape at the top at 41, and enflank the guiding
rails. The distance b between the upper edge of the guiding rails
and the lower edge of the upper frame member of the door frame is
just sufficient to allow the drawer to be inserted whilst still
leaving a small gap. Since the lateral side 36 acts as a
delimitation for both cabinet compartments, it carries a part 42
acting as a guide rail for the drawer situated in the right-hand
cabinet compartment. This guide rail is shown dotted in FIG. 9.
FIG. 10 shows the mounting of a cabinet door. 7 is a cabinet base,
19 a lower door frame section and 20 a lateral door frame section.
The door 43 has right-angle bends 44, 45. In the lower bend 45 is a
hole 46 which receives a bearing pin 47. The bearing pin 47 has a
bottom flange 48. A cavity 49 is formed in the flange 48. The
bearing pin is held in the frame member 19 by means of the
countersunk screw 50. Since the frame member must lie flush on the
base 7, the screwhead 51 is countersunk. The countersinking is
formed whilst tightening the screw 51, being drawn into the cavity
49.
Complementary to the application shown in FIG. 1, FIGS. 11 to 15
show additional applications, namely an application for a double
cupboard or clothes-locker (FIG. 11), for a set of shelves (FIG.
12), for a writing desk (FIGS. 13 and 14) and for a shelf locker
(FIG. 15). In each case, the fundamental principle is applied,
according to which the sides and the door frame are so braced apart
by the base 7 and the cover 11, that they cannot depart from their
position. As shown in FIG. 14 a writing desk comprises cabinet
units 52 and 53 according to the invention, which before assembly
can be packaged in very space-saving manner. The unit 52 moreover
comprises a smaller lower cabinet 54 and an upper drawer cabinet
55.
FIG. 15 shows that a cabinet according to the invention may also be
a component of a set of shelves, composed of units 56 to 60. In
this case, the cabinet 61 has the same dimensions as the shelf
units 56 to 60.
The structure shown in FIG. 1 represents a locker system, the
larger cabinets 1a, 1b being arranged to receive self-service
trolleys 62.
To facilitate the insertion of the trolleys thereinto the cabinets
have a small ramp 63. The smaller compartments or lockers can be
used to store suitcases, shopping bags or small objects (se
umbrella 64 in cabinet 5b). Such lockers may, for example, be set
up in shops or self-service stores.
* * * * *