U.S. patent number 3,697,034 [Application Number 05/002,106] was granted by the patent office on 1972-10-10 for locking shelf bracket support structure.
Invention is credited to Irving W. Shell.
United States Patent |
3,697,034 |
Shell |
October 10, 1972 |
LOCKING SHELF BRACKET SUPPORT STRUCTURE
Abstract
A lockable coupling is provided for shelving assemblies
employing bracket members and upright members which are assembled
to each other in a cantilever fashion. The coupling incorporates
hook-shaped projections at the end of the bracket members which
engage receiving slots in the upright members, and in addition, a
spring biased bar is provided at the end of the bracket member
which springs outward into one of the receiving slots in the
upright member upon completion of assembly of the two members.
Inventors: |
Shell; Irving W. (Chicago,
IL) |
Family
ID: |
21699274 |
Appl.
No.: |
05/002,106 |
Filed: |
January 12, 1970 |
Current U.S.
Class: |
248/243; 211/192;
248/222.13; 248/225.21 |
Current CPC
Class: |
A47B
57/42 (20130101) |
Current International
Class: |
A47B
57/00 (20060101); A47B 57/42 (20060101); A47g
029/02 () |
Field of
Search: |
;248/73,224,241,243
;211/176 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Schultz; William H.
Claims
I claim:
1. A locking coupling for shelving assemblies including an upright
member having one wall with vertically spaced slots located therein
and a bracket member including a hollowed end portion having at
least two outwardly extending hook-shaped members vertically
positioned one above the other, said hook-shaped members being
dimensioned to be receivable into successive ones of said slots and
provide an engagement with said one wall upon relative vertical
downward movement of the bracket member into a position of
engagement with said upright member, whereupon an opening is left
at the upper portion of each of said successive ones of said slots
above said received hook shaped members, comprising:
a rectangular bar member having a cross section dimensioned to
substantially fill the opening left at the upper portion of one of
said slots when one of said hook-shaped members has been inserted
and the bracket member moved into said position of engagement;
and
means including a spring member secured to said bracket member for
positioning said rectangular bar member within said bracket member
while allowing said bar member to move axially within said bracket
member in a plane perpendicular to said wall in said upright
member, said rectangular bar member being positioned above one of
said hook-shaped members so as to be receivable with the opening
provided after said one hook shaped member has been moved to said
position of engagement, said bar member being outwardly biased by
said spring member to cause said rectangular bar to project beyond
said hollowed end portion of said bracket member and to allow said
bar member to retract to a position within said hollowed end
portion when said bar member is urged against a solid portion of
said upright member upon entry of said hook-shaped members into
said vertically spaced slots and prior to interlocking therewith,
and wherein said means including a spring member is located within
said hollowed end portion of said bracket member.
Description
BACKGROUND OF THE INVENTION
This invention relates to display and shelving assemblies held
together by interlocking upright and bracket components and more
particularly to a lockable coupling for such assemblies.
Shelving systems using interlocking components are commonly used to
support commercial merchandising displays as well as in home decor
arrangements where ease of installation, flexibility, portability,
and cost are important factors. The basic components of such
systems comprise slotted upright members which are usually mounted
vertically, and structural members such as brackets equipped for
engaging said upright members in a cantilever fashion. These
interlocking members form the skeleton of the shelving system. They
are used to support shelves, cabinets and various other fixtures
which are used to make up integrated merchandising and storage
units.
A disadvantage of many such shelving systems has been the tendency
for the interlocking uprights and bracket members to loosen and
move relative to one another. This was especially troublesome
wherein a particular bracket was used to form a pedestal at the
base of an upright to make a free standing shelving unit. In such
an arrangement, the forces acting on the bracket leg member are
opposite to the usual loading forces and tend to uncouple the
bracket from the upright. For this and other reasons it is
desirable to have bracket members which are capable of being locked
to the upright members to prevent their accidental separation after
assembly.
One method of locking the members in the past has been to bolt the
upright and bracket members together. However this defeated the
major advantages of such shelving systems, as they were more
difficult to assemble and disassemble and were therefore rendered
more complex and less flexible. Also the holes drilled in the
various system members and the necessary additional hardware tended
to weaken the structure as well as to make it more expensive.
Another disadvantage is that most methods of providing lockable
couplings which use additional hardware are incompatible with
existing systems using the basic bracket and upright members
described.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a locking bracket
support which requires no hardware to effect locking.
A further object is to provide a locking bracket support which is
readably unlocked for disassembly.
A still further object is to provide a locking bracket support
which is compatible with existing shelving systems and upright
members.
In accordance with my invention a locking coupling is provided for
shelving assemblies including at least one upright member having at
least one wall with vertically spaced slots located therein and a
bracket member having hook-shaped projections adapted to enter and
interlock said slots upon vertical movement therein. The bracket
member includes a moveable projection both positioned and outwardly
biased so that upon assembly of said bracket member to said upright
member said moveable projection is caused to enter one of said
slots to thereby prevent substantially all relative vertical
movement between said bracket member and said upright member.
Disassembly is effected by using a suitable tool, such as an
ordinary screwdriver, to retract the locking bar.
BRIEF DESCRIPTION OF THE DRAWING
These as well as other features and advantages of the present
invention will be better understood by reading the following
detailed description together with the accompanying drawings in
which:
FIG. 1 is a perspective view of a bracket member engaged in an
upright support member.
FIG. 2 is a perspective view of a bracket incorporating the locking
feature of the present invention.
FIGS. 3a and 3b show a cutaway plan view of a bracket member
incorporating the invention respectively as it is being inserted
into the upright member and as it appears when in a locked
position.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, a bracket member 1 is shown assembled to an
upright member 2. Hook-shaped projections 5 and 6 (FIG. 2) engage
one wall of the upright member 2 to form a secure coupling
therewith. The bracket member 1 is first positioned so that the
projections 5 and 6 extend through slots 3 located in the said one
wall and then is pushed downward so that the projections engage
said one wall. Without my invention the bracket could be released
from the upright member by an upward force to disengage the hooked
projection from the one wall of the upright and allow the removal
of said projections from the slots.
Referring to FIG. 2, the details of my invention will now be
described. In the end of the bracket member 1, a third projection 7
is provided. This projection is called a locking bar. The locking
bar 7 is preferably of the said width as the projections 5 and 6 so
that it may enter one of the slots 3 provided in the standard
upright member 2. Unlike the hook-shaped projections 5 and 6, the
locking bar 7 is dimensioned lengthwise so that it substantially
fills one of the slots 3 in the upright member 2. In the preferred
embodiment illustrated the bar 7 is the same width as the
projections 5 and 6. The vertical dimension of the bar 7 together
with that of projection 6 is slightly smaller than the vertical
dimension of a slot 3.
In an alternate embodiment (not illustrated) the locking bar 7 has
a vertical dimension which itself substantially fills a slot 3.
Such a bar is positioned on the end of a bracket member so that it
is aligned with a slot in an upright member upon assembly, i.e.,
when the bracket member is pushed downward to engage the wall of
the upright with one or more of the conventional hooked shaped
projections also located on the end of the bracket member.
FIGS. 3a and 3b show the operational and structural details of the
preferred bracket structure embodiment described above and
illustrated in FIG. 2. FIG. 3a shows the bracket member 1 as it
appears when it is inserted into the upright 2. The maximum
vertical dimension of hook-shaped projections 5 and 6 is limited to
the vertical dimension of the slots 3 in the wall of the upright 1.
The locking bar projection 7 is attached to a flexible strip 8,
preferably constructed from a strip of spring steel. One end of the
strip 8 is attached to the rear end of the locking bar and the
other end is attached to any suitable portion of the bracket by
fastening means such as rivet 9.
FIG. 3b depicts the bracket in its locked position. Locking is
achieved by applying a downward force to the bracket member once it
is in position shown in FIG. 3a. When the hook-shaped projections 5
and 6 engage the wall of the upright member 2 and are positioned in
the lower portion of the slots 3, the locking bar 7 springs outward
into the unoccupied portion of the same slot that is partially
occupied by projection 6. The effect of this is many fold. First,
the bracket is securely locked in the upright member as the
hook-shaped projections can no longer be moved upwards to release
the bracket. Secondly, the bracket becomes equally capable of
supporting upwardly directed loading forces as well as downwardly
directed loading forces. This result is achieved because the
locking bar transfers any upward loading force to the upper portion
of the hooked shape projection 6. Third, the locking and support
action described above is achieved without the need of special
upright members, additional hardware, or assembly tools of any
kind.
To unlock the assembly shown in FIG. 3 the locking bar is depressed
so that it is clear of the slot 3. Most upright members are
constructed with one side having an open portion. This portion 4,
shown in FIGS. 1 and 3, greatly facilitates the insertion of a
suitable tool, such as a screwdriver, to depress the locking bar
and thereby unlock the bracket 1 from the upright 2.
It is apparent that the locking bar may be of different design than
the one shown in this embodiment. For example it may consist of an
outwardly biased resilient strip formed by cutting an
inverted-shaped slit in a portion of the end part of the bracket
member itself. The upper end of such a strip would engage the top
edge of a slot 3 in an upright member upon complete engagement of
the upright unconventional hooked shaped projections. Also the
locking bar may be a separate member, or it can be formed integral
with the spring bias means used to urge said means in an outward
axial direction along said bracket member.
The primary use of this lockable coupling is in the area of
shelving assemblies of cantilever construction. Other uses and
embodiments of my invention are possible without departing from the
concept disclosed herein as set forth in the following claims.
* * * * *