U.S. patent number 3,864,886 [Application Number 05/387,708] was granted by the patent office on 1975-02-11 for cover assembly for structural joints.
This patent grant is currently assigned to Architectural Art Mfg., Inc.. Invention is credited to Wenzel W. Thom.
United States Patent |
3,864,886 |
Thom |
February 11, 1975 |
COVER ASSEMBLY FOR STRUCTURAL JOINTS
Abstract
A low cost cover assembly for structural joints is provided
having base structure adapted to be mounted on one structural
section and serving as an anchor for an overlying joint cover
plate. Unique connector components are provided on the face and
cover, respectively, permitting easy press fit installation of the
cover in conforming relationship to the structural sections even
though there may be slight elevational and spacing irregularities
therebetween. The components and cover plate are capable of flexing
as necessary to insure a tight fit of the cover over the joint
regardless of the direction of subsequent relative movement of the
structural sections. The connector components of the base structure
include an integral outwardly facing channel which slidably
receives a number of yieldable, spring metal, U-shaped clips which
are held in position within the channel by I-shaped retainers. An
elongated, continuous, longitudinally serrated connection tongue
projecting from the inner face of the cover plate is adapted to be
received in and held by the clips so that adequate tension is
maintained on the cover plate to bias the latter toward the
structural sections.
Inventors: |
Thom; Wenzel W. (Wichita,
KS) |
Assignee: |
Architectural Art Mfg., Inc.
(Wichita, KS)
|
Family
ID: |
23531056 |
Appl.
No.: |
05/387,708 |
Filed: |
August 13, 1973 |
Current U.S.
Class: |
52/469; 52/466;
52/396.04 |
Current CPC
Class: |
E04B
1/6804 (20130101) |
Current International
Class: |
E04B
1/68 (20060101); E04b 001/68 () |
Field of
Search: |
;52/466,468,469,396,760
;85/79,80 ;404/56,57,58 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Abbott; Frank L.
Assistant Examiner: Friedman; Carl D.
Attorney, Agent or Firm: Schmidt, Johnson, Hovey &
Williams
Claims
Having described the invention, what is claimed as new and desired
to be secured by Letters Patent is:
1. An assembly for complementally covering the open joint defined
by a pair of elongated, spaced, adjacent, relatively shiftable
structural members comprising:
base structure adapted to be fixedly secured to one of said
structural members and presenting a section having an elongated,
continuous channel substantially parallel to said joint and defined
by a pair of spaced, substantially parallel, upstanding sidewalls,
each of the latter being provided with an elongated, continuous,
integral, inwardly extending lip along the top thereof;
yieldable connector means comprising a plurality of yieldable
metallic spring clips positioned within said channel and spaced
along the length thereof, said clips being of lesser transverse
dimensions than the distance between said lips;
means for retaining said springs clips within said channel and
permitting limited shifting and tilting therein by the spring
clips;
cover means disposed in covering relationship to said spring clips
and joint and having connection structure attached to the inner
face thereof and extending therefrom into secure interlocking
relationship with the underlying springs clips; and
support structure adapted to engage the other of said structural
members for supporting the end of said cover means remote from said
base structure.
2. The assembly of claim 1, wherein each of said spring clips is an
integral body of spring steel having a transverse bight portion
engaging the transverse portion of said channel, and a pair of
spaced, upstanding sidewalls each having an inwardly extending,
downwardly sloping portion along the length thereof cooperatively
defining an elongated slot therebetween.
3. The assembly of claim 2, wherein said retainer means for each of
said spring clips comprises an integral locking member of spring
steel having a relatively narrow body portion of a length at least
as long as said spring clip and dimensioned to be inserted between
the upstanding sidewalls of the latter, and ear portions on the
distal ends of said body portion operable to be slidably inserted
within said channel and under the opposed, inwardly extending lips
of the latter.
4. The assembly of claim 3, wherein said locking members are bowed
along the length thereof with the concave faces of the bows facing
the transverse portion of the channel.
5. The assembly of claim 4, wherein said locking members are
composed of spring steel of approximately 0.026 inches
thickness.
6. The assembly of claim 2, wherein connection means comprise an
integral, elongated, connection tongue extending from said cover
means.
7. The assembly of claim 6, wherein said tongue is provided with a
series of elongated, spaced, continuous, upwardly inclined teeth
along the opposed faces thereof, the latter being adapted to
simultaneously interlock with adjacent edges of the respective
downwardly sloping portions of the sidewalls of said spring clips
to thereby tensionably lock the cover means in said covering
relationship.
8. The assembly of claim 1, wherein said base structure is adapted
to be secured to said structural member by means of externally
serrated expansion fasteners.
9. The assembly of claim 1, wherein said covering means is an
elongated, integral plate dimensioned to cover said base structure
and joint, said plate being provided with integral, elongated
support structure along the longitudinal edges thereof adapted to
slidingly engage with the respective structural members.
10. The assembly of claim 9, wherein an elongated, continuous strip
of resilient material is connected to each of said support
structures for engaging with said respective structural
members.
11. The assembly of claim 10, wherein each of said strips has a
series of integral, laterally spaced, elongated, substantially
parallel fins located to directly engage said structural
members.
12. The assembly of claim 9, wherein said base structure is
provided with an integral, elongated, upstanding stop wall adapted
to abut the proximal support structure of said plate and thereby
limit the sliding movement thereof along the underlying structural
member.
13. The assembly of claim 9, wherein the surface planes of said
structural members are substantially perpendicular to define a
corner joint, said covering means being substantially L-shaped in
cross-section and dimensioned to cover both the base structure and
joint.
14. An assembly for complementally covering the open joint defined
by a pair of elongated, spaced, adjacent, relatively shiftable
structural members comprising:
first and second base structures adapted to be securely affixed to
said structural members and each including a section having a
transverse portion and defined by spaced, upstanding sidewalls;
yieldable connector means seated within each of said sections and
of lesser transverse dimensions than the latter;
means for retaining said connector means within said sections and
permitting limited shifting and tilting therein by the connection
means;
separate cover plates disposed in spaced covering relationship to
said first and second base structures, and connection structure
attached to the inner faces of said cover plates and extending into
secure interlocking relationship with the underlying connector
means; and
a joint covering plate overlying said joint and moveably engaging
each of said cover plates.
15. The assembly of claim 14, wherein each of said sections is an
elongated, continuous channel defined by a pair of spaced,
substantially parallel, upstanding sidewalls, said channels being
generally parallel to the joint.
16. The assembly of claim 15, wherein said sidewalls are each
provided with an elongated, continuous, integral, inwardly
extending lip along the top thereof.
17. The assembly of claim 16, wherein said connector means
comprises a plurality of yieldable metallic spring clips positioned
with each of said channels and spaced along the length thereof,
said clips being of lesser transverse dimensions than the distance
between said lips.
18. The assembly of claim 17, wherein each of said spring clips is
an integral body of spring steel having a transverse bight portion
engaging the transverse portions of said channels, and a pair of
spaced, upstanding sidewalls each having an inwardly extending,
downwardly sloping portion along the length thereof cooperatively
defining an elongated slot therebetween.
19. The assembly of claim 18, wherein said retainer means for each
of said spring clips comprises an integral locking member of spring
steel having a relatively narrow body portion of a length at least
as long as said spring clip and dimensioned to be inserted between
the upstanding sidewalls of the latter, and ear portions on the
distal ends of said body portion operable to be slidably inserted
within said channels and under the opposed, inwardly extending lips
of the latter.
20. The assembly of claim 19, wherein said locking members are
bowed along the length thereof with the concave faces of the bows
facing the transverse portions of the channels.
21. The assembly of claim 18, wherein said connection structure
comprises integral, elongated, connection tongues extending from
the inner faces of said cover plates.
22. The assembly of claim 21, wherein said tongues are provided
with a series of elongated, spaced, continuous, upwardly inclined
teeth along the opposed faces thereof, the latter being adapted to
simultaneously interlock with adjacent edges of the respective
downwardly sloping portions of the sidewalls of said spring clips
to thereby tensionably lock the cover plates in said covering
relationship to the underlying base structure.
23. The assembly of claim 14, wherein said first and second base
structures are adapted to be secured to said structural member by
means of externally serrated expansion nails.
24. The assembly of claim 14, wherein said covering means is an
elongated, integral plate dimensioned to cover said base structure
and joint, said plate being provided with integral, elongated,
support structure along the longitudinal edges thereof adapted to
slidingly engage with the respective structural members.
25. The assembly of claim 14, wherein said first and second base
structure each include upwardly facing support sections adapted to
engage the inner face of said joint covering plate.
26. The assembly of claim 25, wherein an upwardly facing resilient
pad is attached to each of said support sections.
27. The assembly of claim 26, wherein said cover plates include
depending ledges along the longitudinal edge thereof proximal to
said joint adapted to engage the outer face of said joint covering
plate.
28. The assembly of claim 27, wherein said ledges and resilient pad
are configured and positioned to cooperatively slidably grip said
joint covering plate therebetween.
29. The assembly of claim 28, wherein said joint is defined by a
pair of structural members whose surface planes are generally
perpendicularly aligned, said support sections being positioned at
relatively different vertical distances with respect to the
underlying support members therebelow, said joint covering plate
being generally L-shaped in cross-section and having stop structure
along the distal longitudinal edges thereof adapted to limit the
sliding of said base structures and associated cover plates
therealong.
30. An assembly for complementally covering the open joint defined
by a pair of elongated, spaced, adjacent, relatively shiftable
structural members and comprising:
base structure adapted to be secured to one of said members and
presenting a section defined by a pair of spaced upstanding
sidewalls;
connector means comprising at least one yieldable spring clip
positioned within said section and of lesser transverse dimensions
than the latter;
means for retaining said spring clip within said section and
permitting limited shifting and tilting therein by the spring
clip;
cover means disposed in covering relationship to said spring clip
and joint and having connection structure attached to the inner
face thereof and extending therefrom into secure interlocking
relationship with the underlying spring clip; and
support structure adapted to engage the other of said structural
members for supporting the end of said cover means remote from said
base structure.
Description
BACKGROUND
This invention relates to a cover assembly for use in covering the
joint defined by elongated, adjacent, spaced, shiftable structural
sections. More particularly, it is concerned with such an assembly
that is capable of maintaining an effective covering function
during all normal relative shifting movements of the structural
sections, and may be manufactured at relatively low cost and easily
installed in the field.
In the art, cover assemblies which are adapted to maintain their
complemental engagement with the underlying structural sections
defining an expansion joint during coplanar as well as transverse
relative movements of the structural sections are commonly referred
to as "four-way" joint covers. These typically have included
relatively expensive components such as leaf and coil springs in
order to provide a continuously applied bias to the cover plate
associated therewith in covering relationship to the joint. For
example, one such prior device employs a covering plate having a
series of centrally positioned, spaced depending studs. A leaf
spring is slidably journaled on each stud and extends into
engagement with separate connection structure attached to each of
the laterally spaced structural sections. Additionally, a coil
spring is positioned about the stud below the leaf spring in order
to insure that the cover plate is operatively biased to shift and
tilt in unison with the structural sections therebelow.
Thus, four-way cover assemblies heretofore provided have been
expensive to manufacture and tedious and time-consuming to install.
For example, in the assembly described above, it is necessary to
include threaded anchoring structure in the respective structural
members during manufacture of the latter, this being required so
that the connection components of the cover assembly may be
securely affixed thereto. The provision of such anchoring structure
extending from the structural members also makes it necessary to
carefully handle and mount the latter so that the outwardly
extending bolts do not become bent or broken, and, thus,
inoperative. Moreover, by virtue of the complexity of such devices,
it has heretofore been necessary to make certain that skilled
workers properly install the assemblies in the field.
Hence, there is a need in the art for a structural joint cover
assembly which is fabricated from relatively inexpensive
components, is capable of maintaining a complemental covering
function under all normal movements of underlying structural
sections, and can quickly be installed in the field by personnel
with ordinary skills.
SUMMARY
Accordingly, it has been found that a cover assembly exhibiting the
characteristics outlined above can be produced by provision of a
base structure designed to be fixedly secured to at least one of
the structural sections or members presenting the joint and having
an elongated channel or track defined by spaced, upstanding
sidewalls. Yieldable connector means of lesser transverse
dimensions than the channel are seated therewithin and are
shiftably and tiltably retained therein by means of separate
retainer structure. A cover is disposed above the base structure
and joint and includes an elongated connection tongue extending
from the inner face thereof. The cover is tensionably maintained in
complemental covering disposition over the joint by the unique
connector means covered by the base structure.
As the adjacent structural sections shift and move with respect to
one another, the orientation of the cover plate relative to the
base structure is altered accordingly, and the forces developed
thereby are, in turn, harmlessly transmitted to the yieldable
spring clip connector means. The latter are capable of shifting,
tilting or deflecting within the channel therefor, and, hence,
these components safely absorb potentially damaging forces. In this
manner, the assembly is not prone to buckling or breaking during
relative shifting of the structural members, but rather it shifts
and tilts in unison therewith in order to provide the desired
complemental covering function.
In particular, the device preferably comprises an elongated,
generally flat base structure configured to be secured to one of
the structural sections by means of conventional fasteners such as
externally serrated expansible nails. The base structure includes
an elongated, continuous channel portion adapted to be disposed in
substantially parallel relationship to the joint and defined by a
pair of laterally spaced, elongated, integral, upstanding walls
having a continuous, inwardly extending lip along the top thereof.
Retainer means are removably and sidably positioned in the channel
and include a series of separate, integral clip members composed of
spring metal, each having a transverse bight segment which seats
within the described channel structure and is of lesser transverse
dimensions than the latter. These members also include upstanding
sidewalls along the distal longitudinal edges of the bight segment,
and each sidewall is further provided with an inwardly extending,
downwardly inclined portion which cooperatively define an elongated
connection slot therebetween.
A plurality of such clip members are positioned within the channel
structure at spaced intervals and are each retained therein by a
generally I-shaped retainer preferably fabricated from aluminum
stock. The relatively narrow, elongated body portion of the
retainer is adapted to be inserted within a corresponding spring
clip member with the distal ear portions of the retainer being
dimensioned to fit beneath the separate opposed lip portions of the
channel portion. In this fashion, the respective spring clips are
retained against removal within the channel, but can shift and tilt
as required to absorb the forces developed by relative movement of
the structural sections.
In one embodiment, the cover means comprises an integral plate
which is adapted to cover both the base structure and joint. The
plate is provided with a longitudinally serrated connection tongue
extending from its inner face and positioned to interlock with the
separate, spaced spring clips retained within the channel as
described. The plate also includes integral longitudinal support
structure along the respective longitudinal edges thereof which
slidably engage the underlying structural sections to provide
additional support and sealing for the plate.
In another preferred embodiment, separate, elongated base
structures are fixedly secured to each structural section adjacent
the joint, each base having parallel channel-defining portions as
previously described, in conjunction with a series of spaced spring
clip connector means therealong. A separate cover plate is then
snapped into place over each of the base structures in conjunction
with a separate joint-covering plate operatively positioned and
maintained between the separate cover plates in order to shift and
tilt in unison therewith. In all of the aforementioned embodiments,
it is also possible to cover a corner or wall-to-ceiling expansion
joint by merely providing a generally L-shaped cover means which is
identical in all other respects to the generally flat cover plates
described.
During installation of the assemblies, the worker first secures the
base structure to the structural members as required with the
spring clips and associated retainers positioned therealong at
spaced intervals. Installation is completed simply by placing the
cover plate over the base structure and joint with the internal,
serrated connection tongue proximal to the slotted spring clips.
The worker then press fits the plate into place by forcibly
inserting the connection tongue within the spring clips along the
length of the joint, as by hammering with a non-damaging tool such
as a rubber or plastic headed hammer. In this manner, the
downwardly sloping portions of the sidewalls of the respective
clips thus engage the upwardly tilted shoulders of the connection
tongue serrations, thereby insuring a tensioned holding of the
plate in its proper covering disposition. Moreover, because of the
yieldable nature of the connector clips, any tilting or shifting
thereof required to compensate for previously misaligned structural
members is automatically accomplished by the forcible insertion of
the connection tongue therewithin. Hence, the cover assemblies
disclosed herein are capable of automatically conforming upon
installation to the relative positions of the adjacent structural
members thereunder.
DRAWINGS
FIG. 1 is a fragmentary, top plan view of a cover assembly in
accordance with the invention, partially cut away to show the base
and channel structure of the assembly with yieldable spring clips
retained within the channel;
FIG. 2 is a vertical sectional view of the assembly taken along
line 2--2 of FIG. 1 showing the normal relative position of the
structural sections to be covered and defining a joint
therebetween;
FIGS. 3 and 4 are vertical sectional views similar to FIG. 2,
showing the compensatory shifting and tilting action of the spring
clips caused by relative shifting of the structural members;
FIG. 5 is a vertical sectional view of an assembly in accordance
with the invention adapted for use in covering a corner joint or
the like;
FIGS. 6 and 7 are vertical sectional views similar to that of FIG.
5, showing the manner in which the corner joint cover assembly
compensates for two other types of relative shifting of the
structural sections;
FIG. 8 is an oblique, vertical sectional view of another embodiment
of the present invention wherein identical base structures are
secured to each of the structural sections adjacent the joint
defined thereby, with a separate joint plate located between the
base structures;
FIG. 9 is an oblique, vertical sectional view of a corner joint
cover assembly similar to that shown in FIG. 8, with a generally
L-shaped joint plate engaging the respective base structures;
FIG. 10 is a perspective view of the preferred spring clip
connector means for use with the present invention, with a
generally I-shaped retainer element inserted within the spring clip
prior to installation along the channel of a base structure.
FIG. 11 is a front elevational view of the retainer element shown
perspectively in FIG. 10, and showing the preferred longitudinal
bow formed in the element; and
FIG. 12 is a perspective view of the spring clip as shown in FIG.
10, prior to insertion of the retainer element therein.
DETAILED DESCRIPTION
One type of joint cover assembly as contemplated by the present
invention is shown in plan in FIG. 1 and generally designated by
the numeral 20. It includes elongated, generally flat, plate-like
base structure 22 constructed in a manner for mounting on
elongated, structural section or member 24. The latter and the
adjacent structural member 26 cooperatively define an expansion
joint 28 therebetween which is necessary to accommodate the
relative shifting of members 24 and 26 due to thermal expansion and
contraction or the like.
The assembly shown is particularly adapted for use in covering wall
or ceiling joints, but the assembly can be modified for floor use
without difficulty, primarily by simply making the component of
slightly heavier material than shown.
Integral base structure 22 includes an elongated, relatively flat
planar mid-segment 32 with an elongated, apertured, upstanding
ridge 34 for the reception of fasteners such as expansion nails 30
which are adapted to securely affix the base structure to section
24.
Adjacent to ridge 34 is a generally vertical stop wall 36 which is
important for purposes to be made clear hereinafter. An elongated,
continuous channel structure 38 is laterally spaced from stop wall
36 and is in generally parallel disposition with respect to joint
28. Channel structure 38 is defined by a pair of spaced, upstanding
sidewalls 40 which are integral with the overall base structure 22
and have an inwardly extending, continuous lip 42 along top
thereof.
A series of spaced spring clip connector means 44 are positioned
within channel structure 38 and are of lesser transverse dimensions
than the distance defined by the opposed, inwardly extending lips
42. spring clips 44 are preferably composed of spring steel and as
best shown in FIG. 12, they each include a transverse bight portion
46 with a pair of integral, elongated upstanding sidewalls 48. Each
adjacent sidewall 48 is also provided with an inwardly extending,
downwardly sloping segment 50 which cooperatively define a slot 52
centrally disposed between the sidewalls 48.
Each of the spaced clips 44 are shiftably and tiltably retained
within the channel structure 38 by means of a generally I-shaped
retainer element 54. Referring specifically to FIG. 10, the element
54 comprises an integral member having an elongated, relatively
narrow body segment 56 which is adapted to be inserted within clip
44 by slipping the segment 56 through slot 52 provided in the
latter. Integral, relatively wider eared portions 58 provided at
opposed distal ends of the body segment 56 are adapted to be
slidingly inserted beneath the opposed lips 42 of the channel
structure 38 to provide the requisite hold-down function for the
respective spring clips 44. As depicted in FIG. 11, the element 54
preferably is fabricated of spring steel of 0.026-inch thickness
and having a slight bow referred to by the numeral 60 along the
length thereof.
During installation procedures, an element 54 is inserted within a
clip 44 in the manner described, with the concave face of element
54 facing downwardly. The associated components are then slidably
inserted within channel structure 38 and shifted into a desired
operative position. For this purpose, it has been found
advantageous to dimension the eared portions 58 of retainer element
54 to facilitate such sliding insertion and positioning. As will be
more fully explained below, a somewhat loose-fitting, slidable,
arrangement of these components does not detract from the overall
integrity of the cover assembly, and, in fact, can enhance the
ultimate fastened integrity of the cover plate.
After the spring clips 44 have been positioned within the channel
structure 38 as described, a cover plate 62 is positioned thereover
and snapped into its final operative position. Plate 62 is
preferably composed of extruded aluminum material and includes an
integral, elongated connection tongue 64 extending from the inner
face thereof and positioned to interlock with the respective spring
clips 44. For this purpose, tongue 64 is provided with a series of
elongated, continuous, spaced, upwardly inclined serrations 66. As
can be appreciated from a study of FIGS. 2-4, these serrations are
adapted to interengage with the respective slot-defining segments
50 of the spring clips 44. In this manner, plate 62 can be
initially positioned in covering relationship to base structure 22
and joint 28 with tongue 64 proximal to the elongated slots 52 in
each of the spring clips 44. Attachment of plate 62 is completed by
forcing tongue 64 into connective interengagement with each of the
clips 44. This can be accomplished most easily by holding the plate
in the position described and forcing the latter into its
completed, locked position.
It is to be understood that by virtue of the slight flexibility of
cover 62 and the yieldable nature of the spring clips 44,
misaligned structural members can be complementally covered without
difficulty. That is, as the connection tongue 64 is forced into its
operative position, the inwardly extending, downwardly inclined
portions 50 of spring clips 44 can engage different levels of the
upwardly disposed serrations 66 on the respective sides of the
tongue. In this manner the clips 44 shift or tilt as necessary to
compensate for previous misalignment of the adjacent structural
members. Hence, the cover assemblies automatically align themselves
in conformity to the configuration of the underlying structural
sections by the expedient of simply forcing the cover toward the
joint throughout its length with force applied therealong being
sufficient to cause the cover to complementally engage the
structural sections regardless of their relative positions.
Elongated, integral, continuous support structure 68 is provided
along the distal longitudinal edges of plate 62 and is adapted to
slidingly engage with each of the respective structural sections 24
and 26. For this purpose, a resilient pad member 70 is interposed
between support structure 68 of plate 62 and the exterior surfaces
of the structural members. Pad 70 is preferably composed of
synthetic rubber-like material and has a relatively stiff upper
flange 72 which is adapted to be slidably inserted within
complementary slot structure provided along each of the supports
68. The lower flexible portion of pad 70 is provided with a series
of elongated, continuous ribs 74 which are in direct engagement
with the surfaces of structural members 24 and 26.
As outlined previously, the cover assemblies of the present
invention are capable of maintaining a fully complemental covering
function during vertical as well as horizontal shifting of the
underlying structural members. Referring now to FIG. 2, it can be
seen that during horizontal shifting of structural sections 24 and
26, the leftmost support structure 68 associated with plate 62 will
slide along the surface of structural member 26, thus insuring that
the joint 28 remains covered at all times. Relative sliding
movement of right-hand support structure 68 is effectively
precluded by means of the attachment between tongue 64 and spring
clips 44, as well as the abutment of this stop structure against
upstanding wall 36.
During relative vertical shifting of the adjacent structural
sections, the following is believed to occur. As shown in FIGS. 3
and 4, the plate 62 is first altered from its generally horizontal
alignment by virtue of the forces developed during such shifting
transmitted through the respective support structures 68. Such
forces, which would normally cause buckling or perhaps even
breakage of plates 62, are in turn safely and effectively
transmitted to the yieldable spring clips 44. In response, the
clips 44 are deflected or can shift or tilt as necessary within
channel structure 38 in order to absorb the potentially destructive
forces. Because each spring clip 44 is of lesser transverse
dimension than the distance between the opposed lips 42, transverse
shifting is possible; moreover, because the elongated body segment
56 of retainer element 54 is of substantially lesser width than the
spring clips 44, the latter can twist and tilt about the axis
defined by elongated, relatively narrow body segment 56. Thus, the
separate spring clips 44 can assume any orientation necessary to
maintain a continuing tight covering function of the assembly.
In this connection, it should be noted that longitudinal shifting
of clips 44 along channel structure 38 is effectively precluded
after installation of plate 62. This results from the fact that
when tongue 64 thereof is inserted within the clips 44, an upwardly
directed biasing force is imparted to the latter. This biasing
force is, in turn, transmitted to the retainer elements 54, causing
the eared portions thereof to snugly engage the underside of the
opposed lips 42. This causes a secure frictional fit of the
elements 54 and thus insures that the associated clips 44 cannot be
moved a significant distance longitudinally with respect to channel
structure 38.
When it is desired to cover a corner joint 76 (FIGS. 5-7) defined
by structural sections 78 and 80 having generally perpendicular
surface planes, it has been found advantageous to employ an
elongated generally L-shaped cover plate 82. In this embodiment of
the invention, base structure 84 is attached to vertically
extending structural member 80 adjacent joint 76. Base structure 84
is identical in all respects to that of structure 22 and,
therefore, a detailed description thereof is omitted. However,
L-shaped cover plate 82 includes a relatively short leg 86 having
integral support structure 88 including pad 89 engaging structural
member 80. An integral, relatively elongated leg 90 with
accompanying identical support structure 92 is also provided and a
continuous, elongated laterally extending serrated connection
tongue 94 extends from leg 86 into operative interlocking
relationship with the spring clips 44 received by base structure
84.
As depicted in FIGS. 6 and 7, the L-shaped cover plate 82 is
similarly maintained in its operative covering disposition during
all normal horizontal and vertical shifting of the structural
members 78 and 80. In general, this is accomplished in a manner
identical to that described above in that the spring clips 44 serve
to absorb the displacement forces transmitted to the cover plate
during relative movements of the structural members.
In another embodiment of the present invention shown in FIGS. 8 and
9, separate identical base structures 96 are secured to each of the
adjacent structural sections along the length of the joint defined
thereby. Each base structure 96 includes a pair of longitudinally
ribbed pads 98 identical to the pads 70 inserted within
complementary slot structure provided along the bottom face of base
structure 96. The latter is provided with a series of apertures
along the length of the structure between the laterally spaced pads
98 which are adapted to receive externally serrated expandable
fasteners 30 which securely mount the base structure to the
respective structural sections. In this manner, the longitudinal
ribs in pads 98 are in direct engagement with the surface of the
structural members and are compressed somewhat to insure a tight
sealing therebetween. At the end of the base structures 96 removed
from joint 100 there is provided an elongated, continuous channel
structure 102 which is likewise identical in all respects to
channel structure 38 described previously, and is adapted to
receive a spaced series of spring clips 44 and related componets
employed in the present invention. A ledge 104 forms the outermost,
upstanding edge of the base structure 96, and is adapted to
abuttably engage with integral depending skirt 106 of cover plate
108. An elongated support section 110 vertically spaced from the
underlying structural section is provided along the length of base
structure 96 adjacent joint 100, and is provided with an upwardly
facing ribbed pad 112 identical to pads 70 and 98.
Each of the described base structures 96 is covered by a separate
plate 108. The latter are connected to the respective base
structures by means of a serrated tongue 114 extending from the
inner surface thereof into locking engagement with the spaced
spring clips 44. A depending skirt 106 is provided along the
longitudinal edge of plates 108 removed from joint 100 which is
adapted to abut ledge 104 of the underlying base structure 96 to
thereby preclude relative sliding movement of cover plate 108.
Thus, each base structure 96 and associated cover plate 108 are in
effect a unit which moves in unison with the structural member to
which they are connected.
The required four-way flexibility of this assembly is achieved by
means of a separate joint covering plate 116 which is slidably
gripped by the respective upwardly facing pads 112 associated with
support structures 110 and the proximal, angularly depending ledges
120 of the plates 108. An inclined stop ledge 118 is also provided
along the distal longitudinal edges of plate 116 and serves to
limit horizontal movement of the respective base structures 96 with
respect to plate 116.
Hence, during horizontal movements of the underlying structural
members, plate 116 remains essentially stationary, while the units
defined by the respective base structures 96 and cover plates 108
move in a horizontal direction relatively. During vertical or
angular shifting of the structural members, the orientation of
plate 116 is first altered in response thereto. The twisting or
buckling forces transmitted to plate 116 are, in turn, transmitted
to the respective plates 108 which cause the spring clips
interconnected therewith to deflect, twist or shift as required in
order to maintain the integrity of the overall assembly. Thus, as
with the embodiment discussed above, an assembly is provided which
is capable of maintaining a tensioned covering of a structural
joint during all normal movements of the respective structural
members.
Referring now to FIG. 9, it will be seen that the present
embodiment can also be adapted to cover a joint 122 defined by
generally perpendicular structural members 126 and 128. Base
structure 96 identical to that discussed is secured to member 126,
with a cover plate 108 secured thereover. A modified base structure
196 is affixed to member 128, the former differing from base
structure 96 only in the vertical spacing of the support section
210 from the underlying structural member and the configuration of
cover 208.
In particular, support section 210 is relatively closer to member
128 than is corresponding section 110 of base structure 96 from
member 126. Additionally, cover 208 has an elongated depending leg
220 which is adapted to engage the outer face of joint-covering
plate 124. By provision of such a modified base structure 196,
sufficient space results between the perpendicularly aligned base
structures to permit coverage of joint 122 during all normal
expansion and contraction of members 126 and 128. If it were
attempted to employ identical base structures 96 in this instance,
too little spacing therebetween would result, thereby severely
limiting the relative sliding movements thereof along the plate
124. This, of course, would diminish the effectiveness of the
overall cover assembly.
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