U.S. patent number 3,748,793 [Application Number 05/142,158] was granted by the patent office on 1973-07-31 for intersection construction for movable wall panel system.
This patent grant is currently assigned to American Standard Inc.. Invention is credited to George F. Retz, Melvin W. Tompkins.
United States Patent |
3,748,793 |
Tompkins , et al. |
July 31, 1973 |
INTERSECTION CONSTRUCTION FOR MOVABLE WALL PANEL SYSTEM
Abstract
Overhead tracks for movable wall panels are particularly adapted
to receive one or more intersection-forming inserts which
facilitate fabrication of a plurality of tracks into grid form.
Each intersection-forming insert includes a central corner-forming
body and interlock arms extending outwardly from the body, usually
at right angles to each other. Each arm is engaged in a cooperating
gap, preferably formed on the adjacent tracks, and the body has an
upper surface and a pair of generally vertical side surfaces which
form extensions of the track. The side surfaces converge together
to form an intersection corner, and in one embodiment define a
90.degree. arc and in another embodiment define an arc between
45.degree.-90.degree.. Abutment surfaces are formed on the body for
positioning the body in a corner-forming position, and a vertical
stem-like portion of the body mates against the side walls of
adjacent tracks.
Inventors: |
Tompkins; Melvin W. (New
Castle, IN), Retz; George F. (New Castle, IN) |
Assignee: |
American Standard Inc. (New
York, NY)
|
Family
ID: |
22498766 |
Appl.
No.: |
05/142,158 |
Filed: |
May 11, 1971 |
Current U.S.
Class: |
52/64; 52/241;
52/474; 52/243.1; 52/704; 52/506.06 |
Current CPC
Class: |
E05D
15/0613 (20130101); E05Y 2900/142 (20130101); E04B
2/827 (20130101) |
Current International
Class: |
E05D
15/06 (20060101); E04b 002/78 () |
Field of
Search: |
;52/656,710 ;287/189.36H
;16/95R,96R,97 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Murtagh; John E.
Assistant Examiner: Braun; Leslie A.
Claims
What is claimed is:
1. In a movable wall panel system which includes a plurality of
tracks having parallel spaced-apart side walls and parallel
spaced-apart running surfaces defining slots therebetween, a series
of movable wall panels, and means for movably suspending said wall
panels from said tracks, wherein the ends of said running surfaces
are disposed at right-angles mutually adjacent to each other, the
combination comprising interlock means including lateral flanges
spaced below said running surfaces and defining gaps therebetween,
and a plurality of intersection-forming inserts for connecting said
mutually adjacent tracks together, each insert including an
intermediate corner-forming body and a pair of arms extending
outwardly at right angles from said body for insertion into said
gaps, said body including pairs of abutment surfaces for mating
against adjacent running surfaces and for mating against adjacent
lateral flanges, a vertical stem-like portion having an arcuate
cross-section with abutment surfaces for mating against said side
walls, upper surfaces coplanar with said running surfaces, and
pairs of generally vertical surfaces forming extensions of said
slots and converging to form an intersection corner for
conveniently assembling said tracks in a grid.
2. The system of claim 1 wherein said converging surfaces are
flared outwardly to narrow said slots, and form arcs between
45.degree.-90.degree. in 90.degree. corners.
3. The system of claim 1 wherein said converging surfaces form
90.degree. arcs in 90.degree. corners.
Description
BACKGROUND OF THE INVENTION
In movable wall panel systems of the type adapted for temporary
division of large rooms into small rooms or the like, wall panels
are commonly suspended from overhead tracks. A relatively common
form of track includes a metal sheet formed with a C-shaped
cross-section and which forms a pair of vertical side walls and a
pair of horizontal spaced-apart track sections which define a slot
therebetween, such as shown in U.S. Pat. No. 3,557,499 of 1971.
Other similar constructions are shown in U.S. Pat. Nos. 1,889,112
of 1932 and 3,181,274 of 1965.
In wall panel systems particularly adapted for schools to divide
space into classrooms, resource centers, study carrels, and various
other arrangements, it is particularly desirable that the tracks be
assembled in the form of a grid which includes a plurality of
angled corners and/or intersections. The corners and intersections
most commonly employed are either T-shaped, L-shaped, or
X-shaped.
Heretofore, fabrication of track grids of this type has been
inordinately expensive because the tracks which are comprised of
metal have generally been welded or soldered together at their ends
in mitered and abutting joints. This type of joining is relatively
difficult because the track ends must be rather precisely fitted
together. In addition, the welding must also be rather precise, so
that the opposite ends of the tracks will fit together with the end
of another track.
SUMMARY OF THE INVENTION
The present invention is directed to an improved movable wall
system and to an improved track construction which substantially
facilitates the fabrication and assembling of tracks in the form of
a suspended grid. The invention includes a novel corner connection
in which an intersection-forming insert cooperates with the
adjacent tracks.
In accordance with the invention, each intersection-forming insert
includes an intermediate, corner-forming body and a pair of arms
extending outwardly from the body for insertion into interlock
channels or voids formed adjacent the running surfaces of the
track. In the preferred embodiment, the running surfaces of the
track are bent downwardly a short distance, and then laterally
outwardly to form lateral support flanges which define with the
running surfaces narrow voids which receive one of the arms of an
insert. The other arm is inserted into an adjacent void of an
adjacent track.
The body provides a continuous surface with the adjacent running
surfaces, and preferably includes abutment surfaces for mating
against the ends of the adjacent running surfaces and for
positioning the body in its corner-forming position. In addition,
the body preferably includes a vertical stem-like portion for
mating against and for forming a smooth and rounded corner with
side walls of adjacent tracks. The upper surface of the body is
coplanar with the running surfaces of the adjacent track sections,
and also includes a pair of converging corner-forming surfaces
which define extensions of the adjacent slots. These principles are
described herein with reference to 90.degree. intersections, but
may be applied to other intersections as well, for example a
"V"-shaped intersection with one track intersecting the other at
60.
In one embodiment, the converging surfaces define a 90.degree. arc
and form a 90.degree. corner with the slots. In another embodiment,
the converging surfaces are flared outwardly to narrow the slots in
the region of the intersection and define an arc between
45.degree.-90.degree.. The intersection-forming inserts may be
formed of metal or plastic material, and in the preferred
embodiments are formed of a low-friction material such as nylon or
PTFE or the like.
In assembling a corner or an intersection, the tracks are first cut
to desired lengths with simple butt ends. The ends of the tracks
are then positioned mutually adjacent to each other so as to allow
a cornering space, and the inserts are put in place.
DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view, showing a plurality of movable wall
panels suspended from a track grid having intersections formed
according to the present invention;
FIG. 2 is a partially broken away and exploded view showing a pair
of tracks disposed at right angles and mutually adjacent to each
other, and showing an intersection insert positioned for connecting
adjacent track sections and forming a portion of an
intersection;
FIG. 3 is a top view of a preferred embodiment of the intersection
insert according to the present invention;
FIG. 4 is an end view taken along line 4--4 in FIG. 3;
FIG. 5 is a top view of another embodiment of intersection insert
according to the present invention;
FIG. 6 is a schematic bottom view of an X-shaped intersection
showing the parts in exploded position and in assembled position;
and
FIG. 7 is a schematic bottom view of a T-shaped intersection
showing the parts in exploded position and in assembled
position.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1, a large room such as a classroom has a grid 10
of tracks 12 suspended from the ceiling. The grid 10 includes a
plurality of intersections 14 formed according to the present
invention. A series of wall panels 15 are suspended from disc-like
glides or pucks 16 (FIG. 2) which are slidably supported by the
tracks 12 and which are connected to the panels 15 by pendant bolts
18. Generally, one such puck and bolt assembly is connected to each
end of each panel.
The tracks 12 include sheets of formed metal having C-shaped cross
sections defining pairs of vertical side walls 20 and pairs of
parallel and inwardly extending running surfaces 22. In the
preferred form, the running surfaces 22 have extensions which are
bent downwardly and then outwardly to form bent slot-forming
portions 24 and lateral support flanges 26. The bent portions 24
define central longitudinal slots 27 through which the pendant
bolts 18 travel and the lateral flanges 26 preferably extend
outwardly a distance beyond the vertical planes defined by the side
walls 20 to form lips 28 on which ceiling tiles 29 are supported.
In addition, each support flange 26 defines with its corresponding
running surface 22 a narrow void or gap 30 for purposes described
hereafter.
The tracks 12 may be hung in any number of ways. In one method,
pairs of Z-shaped hanger brackets 31 are spaced along the length of
the tracks and have lower legs 32 received within the gaps 30 and
upper legs 34 connected to a cross member 36. Support rods 37 are
suspended from the ceiling and are connected to both the cross
member 36 and the hanger brackets 31.
The tracks 12 are suspended from the ceiling with their butt-ends
disposed mutually adjacent to each other, so that one gap 30 from
each track is also disposed adjacent a gap from an adjacent track.
An intersection-forming insert 45, which may be formed of metal but
is preferably molded of a low-friction plastic material such as
nylon or PTFE, forms a corner for each pair of mutually adjacent
tracks. As shown, the insert 45 includes an intermediate
corner-forming body 46 and a pair of arms 47 extending outwardly at
right-angles from the body giving the insert 45 the general form of
an "L". The arms 47 are dimensionally formed for insertion into the
gaps 30.
The body 46 is formed to provide a continuation of each adjacent
track. Referring more specifically to FIGS. 3-4 the body 46
includes pairs of abutment surfaces 54 for mating against the
running surfaces 22, and pairs of abutment surfaces 55 for mating
against the lateral flanges 26. In addition, the body 46 includes a
vertical stem-like portion 58 having an arcuate cross-section and
end surfaces 59 for mating against the side walls 20 of the
adjacent tracks.
The upper surface 60 of the insert 45 is coplanar with the running
surfaces 22, and the body 46 includes a pair of generally vertical
and preferably radiused surfaces 62 coterminous with the
slot-defining bent portions 24 and forming extensions of the slots
27. In one embodiment, the surfaces 62 are flared outwardly to
narrow the slots 27 in the region of the intersection and converge
to define an arc between 45.degree.-90.degree.. Another embodiment,
shown in FIG. 5 as intersection insert 65, is identical with the
embodiment shown in FIG. 3, with the exception that it includes
converging surfaces 66 which define a 90.degree. corner-forming
arc. Both embodiments include an integral portion 67 for mating
against the lip portions 28 of the lateral flanges 26.
Referring to FIG. 6, it can be seen that an X-shaped right-turn
intersection 70 may be constructed by using four of the inserts of
the present invention. Either the flared inserts 45 or the
right-angle inserts 65 may be used. When the flared inserts 45 are
used, as shown in FIG. 6, they reduce the effective width of the
slots 27 in the region of the intersection and facilitate location
of the cross-track. They also provide additional support for the
circular pucks 16 which support the panels. Referring to FIG. 7, a
T-shaped intersection 71 is formed by two of the inserts 45 of the
present invention.
The corner connections provided by the present invention have been
described with reference to right-turn intersections, which are the
most common type of intersection used in moving wall panel systems.
It should be apparent, however, that the principles of the
invention could be employed and appropriate inserts could be molded
to interlock with tracks forming intersections less or greater than
90.degree..
The intersection forming inserts 45 and 65 of the present invention
facilitate fabrication of a grid of tracks as follows. With
reference to FIG. 6, individual tracks 12 suspended from the
ceiling are moved apart to form a generally square space 80. The
insert arms 47 are then fitted into mutually adjacent gaps 30 and
the tracks 12 are moved together until all of them mate against the
abutment surfaces 54, 55, and 59 of the respective inserts. If
necessary, the suspension of the tracks may then be adjusted so as
to maintain the inserts in their intersection forming
positions.
A T-shaped intersection 71 (FIG. 7) may be formed with two tracks
12a formed with notches 82 for receiving the bodies 46 of a pair of
inserts 45. The notches 82 form a rectangular space with the track
12, by constrast to the square space for an X-shaped intersection,
and the insert arms are fitted into the gaps of the adjacent tracks
12a in like manner.
From the foregoing description and the accompanying drawing, it is
apparent that construction of a track grid in accordance with the
present invention provides desirable features and advantages. For
example, in the case of X-shaped intersections, the tracks may be
severed at right angles to their longitudinal center-lines, to form
butt-ends, and this significantly minimizes the problem of forming
mitered joints. The inserts do not require gluing and remain in
position, without falling out or being moved by movement of the
pucks, because of the inter-lock between the lateral flange
supports and running surfaces. They may also be readily
disassembled, if desired, merely by moving the tracks apart.
In addition, an X-shaped intersection may, for example, be
interchanged with a T-shaped intersection merely by substituting a
pair of the notched tracks 12a in FIG. 7 for a pair of the butt-end
tracks 12 in FIG. 6. The same inserts may be used for the
interchanged intersections.
In the case of the flared inserts 65, the flared portions reduce
the space where four slots meet (see FIG. 6), and this has been
found to aid a person standing on the floor to pinpoint the
intersection when the panels are being moved. This is a significant
advantage because it helps teachers to quickly rearrange the wall
panels in classroom situations.
As noted, the invention is not limited to a movable wall panel
system in which inserts are used to form 90.degree. intersections.
For example, the invention may be used with track installations
where intersections are at other than 90.degree., an example being
the division of a hexagonal or pentagonal building in which the
tracks run from the corners to a common center intersection.
While the forms of apparatus herein described constitute preferred
embodiments of the invention, it is to be understood that the
invention is not limited to these precise forms of apparatus, and
that changes may be made therein without departing from the scope
of the invention.
* * * * *