U.S. patent number 3,596,425 [Application Number 05/012,969] was granted by the patent office on 1971-08-03 for ceiling tile support grid system.
This patent grant is currently assigned to Keene Building Products Corporation. Invention is credited to Michael J. Kodaras.
United States Patent |
3,596,425 |
Kodaras |
August 3, 1971 |
CEILING TILE SUPPORT GRID SYSTEM
Abstract
A suspended ceiling structure including a grid system defining a
rigid, interconnected series of transversely and longitudinally
extending ceiling tile support elements, characterized by the
support elements mounting adjacent ceiling tiles at disparate
heights. The structure has sufficient rigidity to form the upper
anchor portion for a vertical partition wall.
Inventors: |
Kodaras; Michael J. (Scarsdale,
NY) |
Assignee: |
Keene Building Products
Corporation (N/A)
|
Family
ID: |
21757619 |
Appl.
No.: |
05/012,969 |
Filed: |
February 20, 1970 |
Current U.S.
Class: |
52/665;
52/506.06; 52/241; 52/775; 403/201; 52/DIG.8; 52/476; 52/781 |
Current CPC
Class: |
F16B
7/0406 (20130101); E04B 9/127 (20130101); F16B
7/0486 (20130101); E04B 9/064 (20130101); E04B
9/008 (20130101); E04B 2009/062 (20130101); Y10S
52/08 (20130101) |
Current International
Class: |
E04B
9/06 (20060101); E04B 9/12 (20060101); E04B
9/00 (20060101); E04b 005/57 () |
Field of
Search: |
;52/488,484,144,145,241,495,476,475,665,489 ;287/189.36A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Murtagh; John E.
Claims
Having thus described the invention and illustrated its use, what I
claim as new and desire to be secured by Letters Patent is:
1. A ceiling system for holding ceiling boards in displaced
horizontal planes, comprising a structurally rigid grid suspended
at its perimeter and at intermediate support positions, said grid
including a plurality of first and second types of horizontal,
intersecting ceiling tile support components, rigidly connected at
their junctions to define a multiplicity of rectangular
tile-receiving pockets, the components of said first type having
along each of their side edges longitudinally extending upper and
lower ledge support channels spaced apart a predetermined vertical
distance, said second type of board support components including
upper and lower board support flange portions projecting
horizontally in opposite directions from opposite sides thereof,
said flanges being spaced apart said predetermined vertical
distance, means for rigidly securing components of said second type
in end-abutting, perpendicular relation against a side of
components of said first type, ledge means including channel anchor
portions disposed in said channels, and board support portions
extending in a direction opposite said anchor portions and disposed
in coplanar alignment with said flange portions, thereby to define
a horizontal support frame for a board.
2. A device in accordance wtith claim 1 wherein said flanges of
said second-type component are vertically displaced by a set amount
from the channels of said first-type component, the anchor portions
of said ledge means being vertically displaced from said board
support portions said set amount, whereby when said anchor portions
are disposed in said channels, said board support portions are in
coplanar alignment with one of said flange portions.
3. A device in accordance with claim 1 wherein said channels are
arcuate in vertical section and said anchor portions of said ledge
mean are of complemental arcuate conformation, said ledge means
including stop-shoulder means beneath said anchor portions for
limiting downward pivotal movement of said board support portions
beyond the horizontal when said anchor portions are disposed in
said channels.
4. A device in accordance with claim 1 and including clip means for
maintaining said support components in said connected relation,
said clip means including spaced shoulder portions engaging spaced
portions of said first support component and limiting transverse
relative movement of said clip and component, at least one
extension leg on said clip projected beyond the lateral sides of
said first component, a bendable tab extending normal to said leg,
a slot formed in said second component of a size to receive said
tab therethrough, said slot being disposed in registry with said
tab when the end portion of said second component is pressed
against a side portion of said first component, said tab being
adapted to be bent from said normal position after said tab has
been passed through said slot, thereby to lock said first and
second components against relative movement.
5. A device in accordance with claim 4 wherein said clip is
received within a transverse slot portion formed on said first-type
component, thereby to limit relative vertical movement between said
clip and said component.
6. A device in accordance with claim 5 wherein said clip includes
extension legs projecting beyond both lateral edges of said first
component, each said extension leg including one of said bendable
tabs whereby a single said clip is adapted to connect a pair of
said second components to a first component.
7. A device in accordance with claim 1 wherein said grid structure
includes intersecting board support components of said first type,
and clip means for holding severed sections of said component in
butt-joint relation, said clip means including stop shoulder
portions adapted to engage spaced portions of one said first
component for limiting transverse movement of said clip and said
first component, extension arms projecting from said stop shoulder
portions and bendable tabs extending normal to said extension arms,
said tabs extending through complementally formed slots in a second
component section of said first type, and adapted to be bent over
after passing though said slot, thereby to hold said two sections
of components of said first type in butt-joint relation.
8. A ceiling system for holding ceiling boards in displaced
horizontal planes, comprising a structurally rigid grid suspended
at its perimeter, said grid including a plurality of horizontally
extending, intersecting board support components rigidly connected
together to define a series of rectangular components, said
sections being of substantial vertical extent, at least two support
means on said intersecting sections for supporting ceiling boards
at one of two selected vertical positions, said support means
including a pair of vertically spaced-apart channels on said
sections and ledge means including channel anchor portions
selectively mountable in one or the other of said channels, and
tile support portions connected to said anchor portions, said ledge
portions defining a frame for supporting a ceiling board, the
height of said frame being variable in accordance with the channel
into which said ledge means are inserted.
9. A device in accordance with claim 8, and including an extruded
partition support section in the form of an inverted U, and
fastener means extending between and connecting said partition
support section to an undersurface of said ceiling support
section.
10. A device in accordance with claim 9 wherein said undersurface
of said ceiling support section includes a longitudinally extending
groove, and said connector means comprises a threaded member
including threaded portions in engagement with sidewall portions of
said groove.
11. A device in accordance with claim 10 wherein said ceiling
support sections are generally U-shaped in vertical section,
inwardly projecting ribs extending along the length of said
sections, inverted T-hangers including a branch portion disposed
beneath said ribs and a stem extending upwardly within said channel
section, said stem being adapted to be connected to depending
hanger means for supporting said T-sections and, hence, said
ceiling support sections.
12. A device in accordance with claim 10 wherein said wall portions
are provided with lengthwisely extending teeth, said teeth being
engageable with said threaded means.
13. A hung ceiling installation comprising a plurality of spaced,
parallel, elongated supporting members extending across a room,
means coacting with said elongated members to suspend the latter
from an overhead portion of such room, each of said supporting
members having a pair of vertically spaced-apart, parallel,
longitudinal channels associated with each side thereof plurality
of spaced transverse members extending between pairs of supporting
members, a spaced pair of said transverse and longitudinal members
including adjacent rectangular areas, means at the terminal ends of
said transverse members for releasable engagement of said
transverse members and said longitudinal members, said transverse
members having an outstanding flange projecting adjacent the upper
and lower extremities thereof in opposite directions, said flanges
lying substantially in the same horizontal plane as one of said
longitudinal channels of an adjacent supporting member, whereby the
flanges in adjacent rectangular areas are disposed in disparate
planes such that ceiling members in adjacent rectangular areas will
be supported at differing heights.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention is in the field of ceiling structures, and relates
particularly to the so-called "hung" or suspended ceiling which is
used in new buildings or in the remodeling of old buildings to
conceal existing overhead areas.
2. The Prior Art
It is known, in new constructions or in the remodeling of existing
constructions, to provide a skeletal metallic grid work, to which
grid work may be mounted ceiling tile sections which, in their
assembled position, conceal air-conditioning ducts, wiring and the
like.
Typically, a separate ceiling grid is installed in each partitioned
room or area. Such ceiling grids are usually flimsy, functioning
merely as tile supports. Where it is desired to subdivide an area
having a "hung" ceiling, it is imperative, for structural rigidity,
that at least a portion of the grid work of the hung ceiling be cut
away, to provide access to the hidden structural support members or
building ceiling.
The partition must be extended upwardly beyond the suspended
ceiling in order that it may be firmly attached to the under
surface of the building structure thereabove. This arrangement is
time consuming and costly, and does not lend itself to ready
relocation of the partitions when it is desired to rearrange the
subdivisions in the chamber or room.
Heretofore, suspended ceiling installations have embodied tile
support structures wherein the tiles are held in coplanar
alignment, providing an appearance which is relatively
uninteresting and not in conformity with the requirements of modern
architectural design which leans toward the use of
three-dimensional concepts in interior surfaces of the
building.
SUMMARY OF THE INVENTION
The invention may be summarized as relating to an improved
suspended ceiling grid construction which may be readily fabricated
at a relatively low cost, which may be installed with no special
tools or equipment, and which, when installed, will provide an
extremely rigid frame or structure capable of supporting the upper
edges of partitions against lateral deflecting forces and thereby
eliminating the need for obtaining access to the areas above the
ceiling for initial installation of the partitions or when it is
desired to repartition the room area.
The partition grid structure is adapted to support adjacent ceiling
boards in different planes, thus providing an interesting ceiling
treatment.
The interrelationship of the displacement of the support structures
for the boards at different heights and the rigidifying effect of
the boards themselves, when positioned, results cumulatively in an
unusually rigid grid, permitting the grid structure itself to act
as the upper receiver of a partition in the manner aforesaid.
It is accordingly an object of the invention to provide an improved
suspended ceiling grid construction.
It is a further object of the invention to provide a construction
of the type described in which installation of individual boards
within the grid structure may be readily effected and wherein
removal of individual boards, if required for temporary access to
wiring or the like, may be readily effected.
It is still a further object of the invention to provide a
suspended ceiling grid structure of the type described which
incorporates novel connector means for linking the transverse and
longitudinal structural elements against relative movement.
Still a further object of the invention is the provision of a
suspended ceiling of the type described in which a variety of
heightwise arrangements of tile may be accomplished, as desired by
the installer.
According to the invention, these objects are accomplished by the
arrangement and combination of elements hereinafter described and
more particularly recited in the claims.
To attain these objects and such further objects as may appear
herein or be hereinafter pointed out, references is made to the
accompanying drawings, forming a part hereof, in which:
FIG. 1 is a perspective view of a partitioned area incorporating a
suspended ceiling of the type described, parts of the building
superstructure being cut away better to illustrate detail;
FIG. 2 is an enlarged perspective view of certain of the components
of the grid, including several types of connectors for linking
structural components;
FIG. 3 is an enlarged top perspective view of a completed
installation;
FIG. 4 is a vertical section taken on the line 4-4 of FIG. 3;
FIG. 5 is a foreshortened section showing details of the manner in
which a partition may be located, utilizing the grid structure as
its upper anchor point;
FIG. 6 is a horizontal section taken on line 6-6 of FIG. 3,
illustrating a type of junction encountered and the means of
connecting the same;
FIG. 7 is a magnified section taken on the line 7-7 of FIG. 6;
FIG. 8 is a horizontal section taken on the line 8-8 of FIG. 3.
Referring now to the drawings, there is diagrammatically
illustrated a building configuration 10 having a grid structure 11
in accordance with the invention. The complete structure 11
comprises a series of intersecting, extruded, metallic grid-forming
members. In the illustrated embodiment, two types of members are
disclosed. A first board support member 12, the structure of which
is best shown in FIG. 2, is generally formed in the configuration
of a U. As also best seen from FIG. 2, the board supports 13 of the
second type are L-shaped in conformation and incorporate a vertical
web 14 having a lower board support ledge 15 extending at right
angle therefrom. The members 13 include an upper board support
ledge 16, which is also horizontally disposed and extends in a
direction opposite to the ledge 15 from the face of the web 14
opposite the face which carries the ledge 15.
As will be appreciated from the more detailed description to
follow, the two types of board supports 13 and 12 may be
interconnected in a multiplicity of different intersecting
positions, to provide an almost endless variety of board supporting
configurations. As shown in FIG. 3, for instance, at point A a pair
of supports of the first type 12 are connected in end-to-end
relation, to define an essentially continuous section. At junction
point B an end portion of a board support of the second type 13 is
connected against a side portion of a board support of the first
type. At junction point C, two end portion of board supports of the
first type 12 are connected against the opposite side portions of a
connector of said first type.
The grid structure is supported at its perimeter on bracket members
17 secured to the walls or bulkheads, the brackets including a
vertical leg 18 and a horizontal support flange 19. The flange 19
forms a seat or support for the end portions of the grid section.
Central portions of the grid structure are suspended from overhead
structural support portions of the building by hangers 20 which are
engaged within supports of the first type, the hangers being
suspended from wires 21 secured to overhead beams or like
structural members.
As will be set out in detail hereinafter, the grid structure is
specifically calculated to support a multiplicity of conventional
rectangular ceiling boards T, which are preferably of lightweight
material. The boards T are supported in a plurality of displaced
planes in a selected or random pattern, as desired. Offsetting the
boards in various plans is unexpectedly considered to add
significantly to the rigidity of the grid structure.
By mounting the boards in the manner aforesaid in horizontal frames
or pockets which are vertically offset from each other, a mutual
rigidifying effect is achieved in which the boards to a degree, act
to augment the structural integrity of the grid, thus permitting
certain exposed lower portions of the grid to act as anchor points
for the uppermost edges of partitions. By this means, a space
having a hung or suspended ceiling in accordance with the invention
may be repartitioned without the requirement of opening the
suspended ceiling to effect a connection between the upper end of
the partition and structural components of the building hidden by
the ceiling.
Referring specifically to FIG. 4 of the drawing, the generally
U-shaped support section 12 of the first type includes upwardly
directed legs 22, 23 and a base 24. The under surface of the base
24 is provided with a central, downwardly opening U configuration
25 which optionally but preferably is extruded with longitudinally
extending teeth or serrations 26, which serrations may, as more
clearly set forth hereinafter, serve as anchor points for threaded
member, which threaded member may be received at any position along
the length of the support member.
The legs 22, 23 of the member 12 are provided with upper and lower,
inwardly extending, arcuate slots S, S'. It will be understood that
the slots S, S' define receiver pockets or channels for support
ledge means 27 which are insertable endwisely into the pockets in
the manner hereinafter described.
The legs 22, 23 incorporate opposed ribs 28, 28, which ribs define
with the inturned portions 29, 29 an upwardly open channel receiver
pocket for the mounting of the branch 30 of the inverted T-hangers
20. It will be appreciated from an inspection of FIG. 4 that the
width of the branch portion is such as to permit the lateral edges
thereof 30', 30' to be disposed within the space between the ribs
28 and portions 29. The fit is a loose one, to enable the T-section
to be slid anywhere along the length of the section 12, where
vertical support is desired.
The stem 31 of the T-hanger 20 is provided with a through aperture
32 for the lower end of a wire support member 33, the upper end of
the support 33 being fixed to any desired form of overhead carrier,
such as the ring member 34.
Support ledge means 27 also comprises extruded sections. The ledge
means 27 includes an anchor portion 35 for reception within the
slots or channels S, S', and a board support portion or flange 36.
An integral vertical connector 37 is disposed between the anchor
and support portions. The anchor portion 35 is arcuate in vertical
section, and it will be appreciated that it is inserted into locked
engagement with the channels or slots S or S' by tilting the
support 37 at an upward angle relative to the horizontal and urging
the anchor portion into the slot with a combined inward and
downward pivotal movement. The portion 38 of the ledge means 27
forms a stop shoulder by its engagement against the outermost edge
portion of the walls 22, 23 adjacent the slots.
From the foregoing it will be appreciated that once inserted into
position in the manner aforesaid, the ledge means cannot be readily
removed except by a reverse upward pivotal and outward movement.
More specifically, a pure horizontal movement will be ineffective
to dislodge the ledge means.
Similarly it ill be understood that when the boards T exert
downward pressure against the ledges, such pressure augments the
locking engagement of the ledge means in the slots or channels S,
S'.
It will be further appreciated that the support portion 36 of the
ledge means is disposed somewhat below the slots or channels, the
upper surface of the support portion being preferably substantially
aligned vertically with the slots. The stop shoulders 38 engage the
walls 22, 23 of support element 12 at a point below the entrance of
the slots.
Referring now to FIG. 2, it will be seen that the grid structure
defines a series of frames or perimeters within which the boards
may be supported against downward displacement, which frames or
perimeters are formed on support sections 12 of the first type by
the board support portions or flanges 36 and, in the case of board
support sections of the second type, by one or the other of the
support ledges 15 or 16 formed integrally with the second type
sections.
It will be observed that the geometry of the second type sections
is such that when the sections of the second type are fixed in
end-abutting relation against a section of the first type, both of
the ledges 15 and 16 will be precisely in alignment with the upper,
supporting surface of a support ledge means inserted into an upper
lot S or a lower slot S'.
As previously mentioned, sections of the first type may be mounted
in end-to-end relationship to form, in essence, extended lengths,
or in end-to-side relationship.
Turning first to the formation of an end-to-end connection, i.e., a
junction of the type identified as " A" in FIG. 3, there is shown
in FIG. 2 the clip or locking member 40 especially adapted to
secure the sections in the manner stated. The locking member 40
includes a pair of extension legs 41, 42, a central U-shaped link
portion 43 connecting the legs, and bendable tab portions 44,
45.
Sections 12 are prepared to be joined by the clip 40 by forming
each clip receiving portion of the section with a tab-receiver slot
46, a central clearanceway 47 being cut in the two sections
adjacent their abutment line 48, to provide clearance for the
U-shaped link portion 43.
As will be evident from FIG. 2, the opposite sides of the sections
12 to be joined are also slotted and cut away in the manner above
described. A clip 40 is inserted into joining position of each side
of the sections by passing the link portions 43 through the
clearanceways 47 and the tabs 44, 45 through the slots 46, 46 The
tab are thereafter bent over so as to lie parallel with the walls
22 and 23.
It will be understood that when the clips 40 are secured to each of
the two sidewalls of the section 12 in the manner aforesaid the
sections will be securely locked together. When properly bent over,
the tabs 44, 45 will not project inwardly beyond the depth or
thickness of the barbs 49, 49 formed at the upper terminal end of
the legs 22, 23. As will be readily recognized, the clips 40 may be
easily fabricated by severing short lengths of an appropriate
extrusion.
In FIG. 2 there is also shown the means for forming a junction
between the end portion of a section 13 of the second type and a
side portion of a section 12 of the first type, i.e., a junction of
the type "B" as illustrated in FIG. 3.
In the formation of such a junction, a clip member 50 is employed.
The clip member 50 includes an elongated web 51 having a pair of
stop shoulders 52, 53 equally spaced from the longitudinal center
of the web. A pair of locking tabs 54, 54 extend from the web 51
adjacent the lateral terminals ends 55, 55 of the web.
The section 12 is prepared for receiving the clip 50 by cutting
transverse slots 56, 56 at opposed positions downwardly from the
upper terminal ends of the legs 22, 23 of the section 12. A tab
receiver slot 57 is formed in each section 13 of the second type,
in spaced relation to the butt end 58 of the section which lies
against the section 12. The slots 57 are spaced from the end a
distance calculated to permit them to receive a tab 54. The clip is
disposed within the transverse slots 56, 56 of the first connector
12. A tab 54 is inserted through the complementally formed slot 57,
the tab being thereafter bent inwardly over the surface of the
second section 13 so as to lie parallel with the web 51 of the
clip. The position of the parts of a formed joint is shown in FIG.
fig. 8.
It will be appreciated that if desired, and depending upon the grid
structure, one or two of the sections 13 of the second type may be
connected by a single clip 50 to the first type section 12.
It will be further appreciated that in the connected position, the
board-suporting flanges or ledges 15, 16 of the connector 13 are
preferably vertically displaced a slight distance from the channels
S and S' of the section 12. By this construction, the bracing
influence of the end portions of the flanges 15, 16 against solid
components of the section 12 are advantageously employed to limit
or restrict the possibility of any pivotal movement of the second
section relative to the first section about the vertical axis
defined by the end portion of the second section. If the flanges
were disposed in alignment with slots S, S', the bracing effect
would be lost, with a consequent substantial loss of rigidity.
There is disclosed in junction C, as shown in FIG. 3, a connection
defined by the intersection of two sections 12 of the first type.
Details of the connection are shown in FIGS. 6 and 7.
It will be appreciated that the connection of FIG. 6 is effected by
using two of the clip structures 50. In the formation of a type
C-junction, cross slots 59, 59, 59', 59' are formed in the
continuous section 60. The end-abutting sections 61, 62 are formed
with cutout slots 63 for receipt of the bendable tabs 54, the tabs
being bent over as shown in FIGS. 6 and 7 after positioning of the
various sections 12.
It will be observed that in the form of both the type B- and the
type C-connections, the stop shoulder 52, 53 engage against the
inner surfaces of the walls 22, 23 to fix the transverse position
of the clip. Then, when the tabs are bent over, an extremely tight
locking against each side of the continuous section 12 is
effected.
In FIG. 5 there is shown, in somewhat oversimplified form, the
means by which a partition may be mounted, utilizing the under
surface of the grid to provide lateral support for the upper edge
of the partition.
In this embodiment, 65 is an extended base channel of general
U-shape, mounted to the floor by fastening means 66 and forming the
lower support portion for the partition structure 67. The upper
support 68 for the partition is defined by an inverted U-shaped
extrusion 69, the branch portion 70 of which is affixed to the
under surface of an extended length of section 12 of the first
type.
For purposes of attachment, holes 71 are cut through the branch 70
at selected intervals. Machine screws 72 are passed through the
holes 71, the shank portion of the screws being tightly threaded
into the teeth or serrations 26 which line the walls of the
downwardly open U-configuration 25. Obviously, the upper support 68
should be in precise registry with the lower support 65.
The partition 67 is mounted by angularly disposing the partition--
see dot and dash position, FIG. 5--forcing the partition upwardly
to its maximum extent, i.e., until the lower partition edge is
above the uppermost limiting ends of the vertical portions of base
channel 65. The panel may then be swung to its solid-line position
and dropped downwardly so that its lower edge enters the U-channel
of the lower support 65. Optionally, transverse fasteners may be
driven through the upper and lower sections 68 and 65 into the
edges of the partition to prevent any relative movement between the
partition and the sections.
From the foregoing it will be evident that with a minimum of stock
sections and clips there may be formed a grid construction for a
suspended-ceiling device of substantial rigidity. In the normal
sequence of installation, it is preferred that all of the sections
12 and 13 be affixed in the desired position and that the support
ledge means 27 be subsequently installed within the appropriate
channels of sections 12 of the first type, to complete in each
instance a downwardly facing perimeter or support frame for ceiling
boards, the ledge means 27 extending between the flanges 15, 16 of
sections 13 of the second type, or between adjacent ledge means
carried within the slots or channels of intersecting sections 12 of
the first type. By displacing adjacent ceiling boards in one of two
selected planes, a highly decorative and rigid ceiling structure is
obtained.
As indicated previously, the ledge means may be inserted into or
removed from receiving channels in the sections 12 only by a
combined pivotal and horizontal movement. Once the boards are
positioned, however, it will be observed that the side edges of the
boards prevent pivotal movement of the magnitude required for
releasing the ledge means. Accordingly, there is no likelihood of
accidental dislodgment or disassociation of a ledge means from its
inserted position after the tiles have once been positioned.
However, should it be desired to obtain access to a space above the
tiles, it will be readily perceived that there is no constraint
against a purely upward movement of a board and a ledge means can
be readily removed after such boar removal.
To expedite formation of the various cutouts, slots and grooves for
interfit of the clips and sections, there may be provided dies,
punches or like expedients which may be used to form and
automatically locate the same.
While the drawings disclose one embodiment of the invention, they
are not to be construed in a limitative sense, as it will be
appreciated by those skilled in the art that modifications or
variations of the structure may be made without departing from the
spirit of the invention as set forth in the appended claims.
* * * * *