U.S. patent number 3,918,225 [Application Number 05/372,752] was granted by the patent office on 1975-11-11 for modular floor system.
Invention is credited to Jules Fisher, Olaf Soot.
United States Patent |
3,918,225 |
Fisher , et al. |
November 11, 1975 |
Modular floor system
Abstract
A modular floor system comprises a plurality of modular floor
elements, each of which can be individually lifted to and supported
at preset heights to change the configuration of the floor. The
modular floor elements can be placed, either individually or in
groups, at different levels relative to each other, to form stages,
stairs, seating areas, display areas, grandstands, and balconies.
Each modular floor element substantially comprises a floor panel, a
sliding post, a sliding post guide, and an air cylinder assembly.
Each sliding post includes a low position stop pin located at the
post's upper portion, a plurality of radially directed uniformly
spaced positioning pin holes, a longitudinally directed keyway, and
an air seal assembly located at the post's lower portion. The
sliding post guide, which is rigidly set into a concrete slab,
includes a key which interacts with the sliding post keyway, a pin
support seat, and leveling means. The floor panel is fastened to
the top of the sliding post, which, in turn, is vertically guided
and laterally supported by the sliding post guide. The sliding post
can be supported at any preset height by a positioning pin which is
placed through a positioning hole on the sliding post. The
positioning pin bears against the pin support seat located on the
upper portion of the sliding post guide. The pin, in addition to
the action of the combination comprising the key and keyway, also
prevents rotation of the sliding post about its longitudinal axis
by coacting with the pin support seat. The air cylinder assembly,
which is fastened to the lower portion of the sliding post guide,
is adapted to receive the sliding post and its air seal assembly.
The sliding post is raised or lowered by introducing air pressure
into the cylinder at a location below the lowermost position of the
air seal assembly. The air supply system, which provides this air
pressure, includes an orifice which, upon deactivation of the air
system, allows air to controllably escape from the cylinder. This,
of course, allows the sliding post to drop until the positioning
pin rests upon the guide's pin support seat. Alternatively, the air
cylinder and air seal assemblies can be deleted, in which case the
sliding post can be raised or lowered by an overhead hoist or by a
portable lift device located below the sliding post.
Inventors: |
Fisher; Jules (New York,
NY), Soot; Olaf (Greenwich, CT) |
Family
ID: |
23469498 |
Appl.
No.: |
05/372,752 |
Filed: |
June 22, 1973 |
Current U.S.
Class: |
52/125.1; 52/29;
52/7; 52/115 |
Current CPC
Class: |
E04H
3/26 (20130101); E04H 3/126 (20130101) |
Current International
Class: |
E04H
3/26 (20060101); E04H 3/12 (20060101); E04H
3/10 (20060101); E04B 005/43 (); B66B 009/04 () |
Field of
Search: |
;52/126,7,111,122,114,29,115 ;248/354H,354P |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
622,047 |
|
Jun 1961 |
|
IT |
|
1,551,170 |
|
Oct 1968 |
|
FR |
|
93,277 |
|
Jun 1923 |
|
OE |
|
128,627 |
|
Jan 1932 |
|
OE |
|
1,125,589 |
|
Nov 1956 |
|
FR |
|
1,030,040 |
|
May 1966 |
|
UK |
|
711,417 |
|
Sep 1931 |
|
FR |
|
Primary Examiner: Purser; Ernest R.
Assistant Examiner: Braun; Leslie A.
Attorney, Agent or Firm: Oliveras; Rene
Claims
What is claimed is:
1. In a modular floor system, a plurality of modular floor elements
each of which can be lifted to and retained at a predetermined
height and each comprising:
a vertically directed hollow cylindrical guide member including
first vertical guide means, and seating means on the upper portion
thereof;
a hollow cylindrical post adapted to be vertically slidable along
the interior portion of said guide member, said post including
second vertical guide means adapted to interact with said first
vertical guide means, a plurality of uniformly spaced radially
directed holes located along the post's length and 90.degree. away
from said first and second vertical guide means, first pin means
fixedly attached to the post's upper external portion, and an air
seal assembly located on the post's bottom portion, said first pin
means being adapted to rest upon said seating means when said post
is at its lowermost position;
a vertically directed hollow cylinder attached to the bottom
portion of said guide member and having one closed end and one open
end, said post's air seal assembly being slidable along the
interior portion of said cylinder; and
means for supplying air to said cylinder, said cylinder including
orifice means for allowing air to controllably escape from said
cylinder;
activation of said supplying means causing said post to be
vertically raised relative to said guide member slightly above said
predetermined height and said orifice means allowing said post to
vertically drop to said predetermined height, second pin means
being insertable into the hole corresponding to said predetermined
height for resting on said seating means thereby retaining said
post at said predetermined height.
2. In a modular floor system, a plurality of modular floor elements
each of which can be lifted to and retained at a predetermined
height and each comprising:
a vertically directed hollow cylindrical guide member including
seating means on the upper portion thereof;
a hollow cylindrical post adapted to be vertically slidable along
the interior portion of said guide member, said post including a
plurality of uniformly spaced radially directed holes located along
the post's length, first pin means fixedly attached to the post's
upper external portion, and an air seal assembly located on the
post's bottom portion, said first pin means being adapted to rest
upon said seating means when said post is at its lowermost
position;
a vertically directed hollow cylinder attached to the bottom
portion of said guide member and having one closed end and one open
end, said post's air seal assembly being slidable along the
interior portion of said cylinder; and
means for supplying air to said cylinder;
activation of said supplying means causing said post to be
vertically raised relative to said guide member slightly above said
predetermined height and deactivation of said supplying means
causing said post to vertically drop to said predetermined height,
second pin means being insertable into the hole corresponding to
said predetermined height for resting on said seating means thereby
retaining said post at said predetermined height and means for
allowing air to controllably escape from said cylinder.
Description
FIELD OF THE INVENTION
This invention relates to a modular floor system and, in
particular, to such a system whose elements can be individually
lifted to and stably supported at predetermined heights.
BACKGROUND OF THE INVENTION
Stage and theater design techniques require economy and flexibility
of floor space. One approach to this problem is the modular floor
system concept. Prior Modular floor systems have relied on
conventional hydraulic, pneumatic, and mechanical lifting
machinery. These systems have been expensive and, consequently,
their construction has not been economically feasible. Some prior
systems, especially those of the pneumatic type, have exhibited
slow leaks and therefore unstable height control.
Objects of the present invention are therefore to:
provide a modular floor system;
provide such a system of the pneumatic type which is not
susceptible to unstable height control;
allow for a variety of seating and stage arrangements which suit
the specific requirements of a particular performance; and
provide for flexibility of space by using vertically adjustable
floor elements.
SUMMARY OF THE INVENTION
According to the present invention, a modular floor system
comprises a plurality of modular floor elements, each of which can
be individually lifted to and supported at preset heights to change
the configuration of the floor. Each floor element substantially
comprises a floor panel, a sliding post, a sliding post guide, and
an air cylinder assembly. The floor panel is rigidly fastened to
the upper portion of the sliding post and is perpendicular to the
post's longitudinal axis. The floor panel incorporates anchors for
mounting removable seats, hand rails, fascias, and other
components. A removable cover is provided on one side of the floor
panel for ready access to the quick disconnect air coupling located
below on the concrete slab. In addition, the floor panel is
removable and can be replaced by a variety of structures, such as a
turntable. These structures, of course, can be fastened to the
upper portion of the sliding post at any desired angular position.
Each sliding post includes a low position stop pin located at the
post's upper portion, a plurality of radially directed uniformly
spaced positioning pin holes, a longitudinally directed keyway, and
an air seal assembly located at the post's lower portion. The
positioning pin holes are located 90.degree. from the keyway. The
air seal assembly is mounted so as to permit a small amount of
lateral motion. This, of course, allows the air seal to center
itself inside the air cylinder in order to prevent binding. The
sliding post guide, which is rigidly set into the above-mentioned
concrete slab, includes; a key which interacts with the post's
keyway to constrain the post's motion to the vertical direction; a
pin support seat; and leveling means. The sliding post guide
provides lateral support to the sliding post when the sliding post
is at a predetermined position or while it is being lifted or
lowered. The pin support seat is also positioned 90.degree. from
the keyway. The sliding post guide provides both vertical and
rotational support to the sliding post whenever the positioning pin
rests on the pin support seat. The leveling means allows for
accurately controlling the vertical alignment of the sliding post
guide and therefore of the sliding post. The lower portion of the
sliding post guide is adapted for mounting the air cylinder
assembly. The longitudinal axes of the sliding post guide, the
sliding post, and the air cylinder assembly are concentric. The air
cylinder assembly includes a relief valve and hose connections at
the bottom portion thereof. The air supply utilized for lifting or
lowering the sliding post is connected to the air cylinder by means
of a quick disconnect coupling and associated air hoses. The quick
disconnect coupling includes an orifice which allows air to escape
from the cylinder via the orifice when the compressed air supply is
disconnected from the quick disconnect coupling. This, of course,
allows for lowering of the sliding post until the positioning pin
rests on the pin support seat.
According to another embodiment of the present invention, an
overhead hoist or other mechanical means such as a portable lifting
device located beneath the sliding post can be used to vertically
raise the sliding post. In this embodiment, the air seal and
cylinder assemblies are not required. The sliding post, floor
panel, positioning pin, and sliding post guide interact
substantially as before.
Features of the present invention are therefore that:
it utilizes a combination pneumatic-mechanical system for lifting
and stably maintaining the floor panel at a predetermined
height;
it utilizes a controlled air leak via an orifice to lower the
sliding post until the positioning pin engages the pin support seat
located on the sliding post guide;
it utilizes a non-precision pneumatic lift system in conjunction
with a positive mechanical support means;
the air supply means is connected to the cylinder via a removable
side element located on the floor panel;
a positioning pin is inserted into the sliding post to maintain the
floor panel at a fixed predetermined height;
the sliding post guide maintains the vertical alignment of the
sliding post, prevents rotation of the sliding post, and supports
the sliding post via its pin support seat;
the sliding post and its associated guide are the only precision
elements of the system; and
only the sliding post guide must be accurately positioned and
leveled.
Advantages of the present invention are therefore that:
it allows for economy and flexibility of theater and stage floor
space;
it is adaptable for use with simple pneumatic lift means, a
portable jack assembly, or an overhead hoist;
it is safe and economical;
the floor panel can be adapted to receive seats or other desired
structures;
it is not susceptible to slow air leaks; and
field installation costs thereof are minimized.
BRIEF DESCRIPTION OF THE DRAWING
Other objects, features, and advantages of the present invention
will be better appreciated by a consideration of the following
detailed description and the drawing in which:
FIG. 1 is a partially cross-sectional front view of a modular floor
element in the raised configuration according to the present
invention;
FIG. 2 is an exploded perspective view of a modular floor element
in the raised configuration and associated handrails, seats, lights
and anchoring devices; and
FIG. 3 is a detailed cross-sectional view of an air seal assembly
according to the present invention.
DETAILED DESCRIPTION
FIGS. 1 and 2 show a modular floor element according to the present
invention. Modular floor element 200 substantially comprises floor
panel assembly 10, sliding post assembly 20, sliding post air seal
assembly 30, sliding post guide assembly 40, air cylinder assembly
50, and quick disconnect coupling and air hose assembly 60.
Associated with modular floor element 200 are portable compressed
air supply with gun 70 and removable furnishings 100 mounted to
floor panel assembly 10. A plurality of modular floor elements 200
make up a modular floor system.
According to the present invention, floor panel assembly 10
includes steel X-shaped frame 11 having associated therewith
threaded studs 17 welded to its underside, for rigidly and
removably connecting floor panel assembly 10 to sliding post top
plate 22. Flooring 12 and associated side stiffening members 13 and
toe guard 14 form a rigid panel, which panel is fastened on top of
frame 11. Bumper strip 15 is fastened on all sides of the floor
panel assembly at its top edge. Removable side element or plug 16
is placed into an opening at the side of the floor panel assembly.
The opening is used for connecting portable air gun 70 into quick
disconnect coupling 61 for raising or lowering sliding post
assembly 20 and associated panel assembly 10, when floor panel
assembly 10 and sliding post assembly 20 are at their lowest
position. Flush anchoring devices with slotted key holes 117 are
located at the end of each side of floor panel assembly 10.
Anchoring sleeves 18, which are perpendicular to the top surface of
floor panel assembly 10 and located at each corner thereof, are
mounted within floor panel assembly 10. Anchoring sleeves 18 are
furnished with cover plugs 19 for closing the sleeve openings when
sleeves 18 are not used for anchoring furnishings 100 to floor
panel assembly 10.
Sliding post assembly 20 is used for raising and lowering floor
panel assembly 10 and for supporting floor panel assembly 10
through positioning pin 27 on sliding post guide assembly 40 when
floor panel assembly 10 is placed at any of its raised positions.
Sliding post assembly 20 includes tubular member 21 having a
circular cross section when viewed perpendicular to its
longitudinal axis. Top plate 22 is rigidly welded or otherwise
rigidly connected onto the extreme top end of tubular member 21
perpendicular to the longitudinal axis of such tubular member. Top
plate 22 is used for mounting floor panel assembly 10 to the top
end of sliding post assembly 20. Circular cap 26 is welded or
otherwise rigidly mounted onto the extreme bottom end of tubular
member 21, perpendicular to the longitudinal axis of such member.
Circular cap 26 is used for providing support and connection for
sliding post air seal assembly 30. Pin 23 is inserted through the
tubular member near its top end and welded to the tubular member
with both its ends protruding through to the outside of tubular
member 21. This pin is located at the longitudinal center-line of
the tubular member and perpendicular to that center-line, in line
with positioning pin holes 24. The purpose of pin 23 is to support
sliding post assembly 20 vertically on top of sliding post guide
assembly 40, thereby bearing against groove 43, and to prevent its
rotation relative to sliding post guide assembly 40, when floor
panel assembly 10 and sliding post assembly 20 are at their extreme
lowermost positions. Sliding post assembly 20 is vertically
supported on top of sliding post guide 40 at any pre-set use
position by removable positioning pin 27, which pin is inserted
through positioning hole 24 which corresponds to the desired
elevation of floor panel assembly 10. Positioning pin 27 also
prevents rotation of the sliding post assembly relative to sliding
post guide assembly 40, when such pin is bearing on top of sliding
post guide assembly 40 within groove 43.
Positioning holes 24 on sliding post tubular member 21 are drilled
through both sides of tubular member 21 through the center-line
thereof and at right angles to the longitudinal axis thereof.
Positioning holes 24 are spaced parallel to the longitudinal axis
of tubular member 21 so as to correspond to desired pre-set
elevations of floor panel assembly 10 use positions. The outside
edges of positioning holes 24 are beveled so as to prevent
distortion of the outside face of tubular member 21 from possible
impact forces resulting from positioning pin 27 hitting the top of
the sliding post guide assembly during the lowering operation.
Continuous keyway 25 is cut into one side of tubular member 21,
keyway 25 being parallel to the longitudinal axis of member 21. In
this embodiment, keyway 25 is located at right angles to
positioning pin holes 24; however, any other relative positioning
of keyway 25 and positioning pin holes 24 can be used. Keyway 25 is
used to prevent the rotation of sliding post assembly 20 relative
to sliding post guide 40 while sliding post assembly 20 is being
raised or lowered and otherwise when it is not being supported by
pin 23 or positioning pin 27. Keyway 25 engages a key 42 which is
part of sliding post guide assembly 40.
The functions of sliding post guide assembly 40 are as follows:
a. to rotationally and laterally guide and support sliding post and
floor panel assemblies 20 and 10, respectively;
b. to vertically support, via pin 23, positioning pin 27, or via
compressed air in cylinder space 56, sliding post and floor panel
assemblies 20 and 10, respectively;
c. to support air cylinder assembly 50;
d. to support the entire modular floor element on permanent
structure 80; and
e. to provide simple means for positioning and leveling the entire
modular floor element relative to permanent structure 80 before
rigidly fastening it to the structure.
Sliding post guide assembly 40 includes cast or welded metal
cylindrical housing 41, further including finished cylindrical
guiding surfaces 46 inside thereof, near its top and bottom ends;
means for mounting key 42 near its top end; and means for mounting
air cylinder assembly 50 to its bottom end. Cylindrical housing 41
further includes support flange or flanges 47 on the outside
portion thereof and groove 43 for engaging and supporting fixed pin
23 or removable positioning pin 27. The purpose of cylindrical
guiding surfaces 46 is to provide lateral support to sliding post
assembly 20 at any position, while in motion or while stationary.
The purpose of groove 43 is to provide vertical support to sliding
post assembly 20, through fixed pin 23 or through removable
positioning pin 27 when either of these pins bears against the
surfaces of groove 43. Groove 43 also prevents rotation of sliding
post assembly 20 and floor panel assembly 10, when either pin 23 or
27 engages such groove.
Key 42 engages keyway 25 and rotationally guides sliding post
assembly 20 and floor panel assembly 10 while they are in motion.
Key 42 is fastened to cylindrical housing 41 so as to permit its
initial alignment with relation to groove 43 during assembly. Key
42 is accurately positioned when pin 27 bears against groove 43 so
that the sides of keyway 25 are free to slide in relation to key
42. After this alignment is accomplished, key 42 connection is
tightened to prevent movement thereof relative to cylindrical
housing 41. This alignment prevents possible binding, which can
otherwise be caused by the jamming of keyway 25 against key 42
whenever the alignment of either pin 23 or pin 27 to groove 43 is
not precise. Sliding post guide assembly 40 is supported during
installation by leveling bolts 45 and nuts 44. After it is properly
leveled and positioned, sliding post assembly 40 is rigidly grouted
in place with non-shrink grout 82. It is apparent that means other
than concrete slab 80 could be used for fastening sliding post
guide assembly 40 to the permanent support structure.
Air cylinder assembly 50 includes tubular cylinder 51, bottom cap
53, pressure relief valve 54, and air pipe 55. The top end of air
cylinder assembly 50 is fastened to the bottom end of sliding post
guide assembly 40, their longitudinal axes being concentric. Air
cylinder assembly 50 also includes pressure in cylinder space 56
whenever sliding post assembly 20 overtravels in the upward
direction. A compressed air source, not shown, and air gun 70 are
connected to air cylinder assembly 50 via quick disconnect coupling
61, by piping, and by flexible hose 60. Air gun 70 includes raising
and lowering valves, not shown. Quick disconnect coupling 61, or
its housing 63, includes a positioning device, not shown, which
permits connecting air gun 70 to quick disconnect coupling 61 only
in one position. This is done so that the operator's hand 71 would
be out of the way of floor panel assembly 10 as it travels upward.
Quick disconnect coupling 61 further includes an orifice, not
shown, which relieves the pressure in cylinder space 56 whenever
air gun 70 is removed from quick disconnect coupling 61. The
controlled escape rate of air from cylinder space 56 through this
orifice slowly lowers sliding post assembly 20 until either pin 27
or pin 23 engages groove 43 on top of sliding post guide assembly
40 thereby setting the height of floor panel assembly 10. The
orifice in quick disconnect coupling 61 guarantees that floor panel
assembly 10 is always positively supported by either positioning
pin 27 or pin 23.
FIG. 3 shows air seal assembly 30 according to the present
invention. Neoprene cup 31 is supported by retainer plate 32 and
connected to circular cap 26 through shoulder bolt 33, which bolt
is rigidly connected or welded to circular cap 26. Retainer plate
32 and cup 31 are free to move laterally within the limits of hole
36, which hole is larger than the diameter of bolt 33. This
movement permits neoprene cup 31 to align with air cylinder
assembly 50 and eliminates binding in case of minor misalignment
between air cylinder assembly 50 and sliding post assembly 20.
Circular bumper plate 34 is placed in between cap 26 and retainer
plate 32 and held in place by shoulder bolt 33. Bumper plate 34
prevents the bottom end of sliding post assembly 20 from leaving
sliding post guide assembly 40 in case of overtravel in the upward
direction. Circular neoprene ring 35 is placed on top of the bumper
plate to absorb the impact between bumper plate 34 and sliding post
guide assembly 40 during their contact.
Sliding post assembly 20 can be moved from sliding post guide
assembly 40 when bumper plate 34 is removed from the bottom of the
sliding post assembly 20.
From FIG. 1 it is apparent that each floor panel assembly can be
raised and set to any pre-set position, higher than its initial
position, by going through the following steps:
a. remove plug 16;
b. insert air gun 70 into quick disconnect coupling 61;
c. release pressured air by opening the valve, not shown, in air
gun 70, into cylinder space 56, thereby lifting pin 27 off groove
43;
d. remove positioning pin 27;
e. raise sliding post assembly 20, together with floor panel
assembly 10, with compressed air, slightly above the desired
elevation so that the corresponding positioning hole 24 is slightly
above groove 43;
f. insert positioning pin 27 into the appropriate positioning
hole;
g. release the compressed air from cylinder space 56 by using the
valve, not shown, which is part of the air gun 70, or remove air
gun 70 from quick disconnect coupling 61. The escape of air from
the cylinder space 56 lowers sliding post assembly 20 until
positioning pin 27 engages groove 43 and supports floor panel
assembly 10 through sliding post assembly 20; and
h. replace the plug 16.
From FIG. 1 it is apparent that each floor panel assembly can be
lowered to any pre-set position lower than the initial position by
going through the following steps:
a. remove plug 16;
b. insert air gun 70 into quick disconnect coupling 61;
c. release pressurized air, by opening the valve, not shown, in air
gun 70, into the cylinder space 56, thereby lifting pin 27 off
groove 43;
d. remove positioning pin 27 and insert it into the appropriate
positioning holes above, corresponding to the desired new lower
position of floor panel assembly 10; and
e. release the compressed air from cylinder space 56 by the use of
the valve, not shown, which is part of air gun 70, or remove air
gun 70 from quick disconnect coupling 61. The escape of air from
cylinder space 56 lowers sliding post assembly 20 until positioning
pin 27 engages groove 43 and supports floor panel assembly 10
through sliding post assembly 20.
It is further apparent from FIG. 1 that each floor panel assembly
10 is positively supported by positioning pin 27 or pin 23 at any
of its positions which are preset by positioning pin holes 24.
Therefore, these modular floor elements do not rely on air pressure
to maintain their positions while in use. Also, no slow or
accidental drift can occur, which is a common problem with
pneumatic or hydraulic systems when not properly maintained. Also
individual floor elements can be placed and positively supported at
one or at various elevations, thereby providing the means for
changing the configuration of the floor to suit particular program
requirements. In addition, each floor element can be used as a
theatrical or display elevator for creating the desired visual or
functional effects for a performance.
As an alternate, the portable air source, not shown, air gun 70,
quick disconnect coupling 61, housing 63, and piping 62 can be
eliminated and replaced by permanent compressed air, a supply,
piping, and appropriate control valves which would effect functions
similar to those described above.
As a further alternate, the entire compressed air operating system
can be eliminated. This would include the deletion of sliding post
air seal assembly 30; air cylinder assembly 50; quick disconnect
coupling; air hose assembly 60; and portable compressed air supply
with air gun 70. The compressed air lifting system can be replaced
with a portable jack or lift engaging the bottom end of sliding
post assembly 20, or by an overhead hoist system connected to the
top end of sliding post assembly 20. The functions and details of
all other components of the modular floor element described above
would remain unchanged.
FIG. 2, in addition to the basic floor element components described
above, shows some of furnishings 100, which can be used in
conjunction with the modular floor elements. Seats 105 are
supported by legs 104 and held in position on top of floor panel
assembly 10 by pins 103 inserted into anchoring sleeves 18. Light
101, can be inserted into anchoring sleeves 18. Guardrail units
102, or fascias, not shown, can be connected to the floor panel
assembly through anchoring devices 117. Many other furnishings,
different floor panel shapes, turntables, or combined structures
supported by one or more sliding post assemblies 20 can be used in
conjunction with the modular floor system.
While the arrangement according to the present invention has been
described in terms of a specific embodiment, it will be apparent to
those skilled in the art that many modifications are possible
within the spirit and scope of the disclosed principle.
* * * * *